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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 inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
42{
43 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
44
45 u64_stats_update_begin(&tstats->syncp);
46 tstats->tx_packets++;
47 tstats->tx_bytes += len;
48 u64_stats_update_end(&tstats->syncp);
49}
50
51static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
52 struct sk_buff *skb, int group_addr,
53 int next_frag_len)
54{
55 int rate, mrate, erp, dur, i, shift = 0;
56 struct ieee80211_rate *txrate;
57 struct ieee80211_local *local = tx->local;
58 struct ieee80211_supported_band *sband;
59 struct ieee80211_hdr *hdr;
60 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
61 struct ieee80211_chanctx_conf *chanctx_conf;
62 u32 rate_flags = 0;
63
64
65 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
66 return 0;
67
68 rcu_read_lock();
69 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
70 if (chanctx_conf) {
71 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
72 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
73 }
74 rcu_read_unlock();
75
76
77 if (WARN_ON_ONCE(tx->rate.idx < 0))
78 return 0;
79
80 sband = local->hw.wiphy->bands[info->band];
81 txrate = &sband->bitrates[tx->rate.idx];
82
83 erp = txrate->flags & IEEE80211_RATE_ERP_G;
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102 hdr = (struct ieee80211_hdr *)skb->data;
103 if (ieee80211_is_ctl(hdr->frame_control)) {
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118 return 0;
119 }
120
121
122 if (0 )
123 return cpu_to_le16(32768);
124
125 if (group_addr)
126 return 0;
127
128
129
130
131
132
133
134
135
136
137
138 rate = -1;
139
140 mrate = sband->bitrates[0].bitrate;
141 for (i = 0; i < sband->n_bitrates; i++) {
142 struct ieee80211_rate *r = &sband->bitrates[i];
143
144 if (r->bitrate > txrate->bitrate)
145 break;
146
147 if ((rate_flags & r->flags) != rate_flags)
148 continue;
149
150 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
151 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
152
153 switch (sband->band) {
154 case NL80211_BAND_2GHZ: {
155 u32 flag;
156 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
157 flag = IEEE80211_RATE_MANDATORY_G;
158 else
159 flag = IEEE80211_RATE_MANDATORY_B;
160 if (r->flags & flag)
161 mrate = r->bitrate;
162 break;
163 }
164 case NL80211_BAND_5GHZ:
165 if (r->flags & IEEE80211_RATE_MANDATORY_A)
166 mrate = r->bitrate;
167 break;
168 case NL80211_BAND_60GHZ:
169
170 case NUM_NL80211_BANDS:
171 WARN_ON(1);
172 break;
173 }
174 }
175 if (rate == -1) {
176
177
178 rate = DIV_ROUND_UP(mrate, 1 << shift);
179 }
180
181
182 if (ieee80211_is_data_qos(hdr->frame_control) &&
183 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
184 dur = 0;
185 else
186
187
188
189 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
190 tx->sdata->vif.bss_conf.use_short_preamble,
191 shift);
192
193 if (next_frag_len) {
194
195
196 dur *= 2;
197
198 dur += ieee80211_frame_duration(sband->band, next_frag_len,
199 txrate->bitrate, erp,
200 tx->sdata->vif.bss_conf.use_short_preamble,
201 shift);
202 }
203
204 return cpu_to_le16(dur);
205}
206
207
208static ieee80211_tx_result debug_noinline
209ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
210{
211 struct ieee80211_local *local = tx->local;
212 struct ieee80211_if_managed *ifmgd;
213 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
214
215
216 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
217 return TX_CONTINUE;
218
219
220 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
221 return TX_CONTINUE;
222
223
224 if (local->hw.conf.dynamic_ps_timeout <= 0)
225 return TX_CONTINUE;
226
227
228 if (local->scanning)
229 return TX_CONTINUE;
230
231 if (!local->ps_sdata)
232 return TX_CONTINUE;
233
234
235 if (local->quiescing)
236 return TX_CONTINUE;
237
238
239 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
240 return TX_CONTINUE;
241
242 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
243 return TX_CONTINUE;
244
245 ifmgd = &tx->sdata->u.mgd;
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
261 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
262 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
263 return TX_CONTINUE;
264
265 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
266 ieee80211_stop_queues_by_reason(&local->hw,
267 IEEE80211_MAX_QUEUE_MAP,
268 IEEE80211_QUEUE_STOP_REASON_PS,
269 false);
270 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
271 ieee80211_queue_work(&local->hw,
272 &local->dynamic_ps_disable_work);
273 }
274
275
276 if (!ifmgd->associated)
277 return TX_CONTINUE;
278
279 mod_timer(&local->dynamic_ps_timer, jiffies +
280 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
281
282 return TX_CONTINUE;
283}
284
285static ieee80211_tx_result debug_noinline
286ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
287{
288
289 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
290 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
291 bool assoc = false;
292
293 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
294 return TX_CONTINUE;
295
296 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
297 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
298 !ieee80211_is_probe_req(hdr->frame_control) &&
299 !ieee80211_is_nullfunc(hdr->frame_control))
300
301
302
303
304
305
306
307
308
309
310
311 return TX_DROP;
312
313 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
314 return TX_CONTINUE;
315
316 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
317 return TX_CONTINUE;
318
319 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
320 return TX_CONTINUE;
321
322 if (tx->sta)
323 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
324
325 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
326 if (unlikely(!assoc &&
327 ieee80211_is_data(hdr->frame_control))) {
328#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
329 sdata_info(tx->sdata,
330 "dropped data frame to not associated station %pM\n",
331 hdr->addr1);
332#endif
333 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
334 return TX_DROP;
335 }
336 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
337 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
338
339
340
341
342 return TX_DROP;
343 }
344
345 return TX_CONTINUE;
346}
347
348
349
350
351
352static void purge_old_ps_buffers(struct ieee80211_local *local)
353{
354 int total = 0, purged = 0;
355 struct sk_buff *skb;
356 struct ieee80211_sub_if_data *sdata;
357 struct sta_info *sta;
358
359 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
360 struct ps_data *ps;
361
362 if (sdata->vif.type == NL80211_IFTYPE_AP)
363 ps = &sdata->u.ap.ps;
364 else if (ieee80211_vif_is_mesh(&sdata->vif))
365 ps = &sdata->u.mesh.ps;
366 else
367 continue;
368
369 skb = skb_dequeue(&ps->bc_buf);
370 if (skb) {
371 purged++;
372 ieee80211_free_txskb(&local->hw, skb);
373 }
374 total += skb_queue_len(&ps->bc_buf);
375 }
376
377
378
379
380
381 list_for_each_entry_rcu(sta, &local->sta_list, list) {
382 int ac;
383
384 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
385 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
386 total += skb_queue_len(&sta->ps_tx_buf[ac]);
387 if (skb) {
388 purged++;
389 ieee80211_free_txskb(&local->hw, skb);
390 break;
391 }
392 }
393 }
394
395 local->total_ps_buffered = total;
396 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
397}
398
399static ieee80211_tx_result
400ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
401{
402 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
403 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
404 struct ps_data *ps;
405
406
407
408
409
410
411
412
413
414
415 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
416 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
417 if (!tx->sdata->bss)
418 return TX_CONTINUE;
419
420 ps = &tx->sdata->bss->ps;
421 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
422 ps = &tx->sdata->u.mesh.ps;
423 } else {
424 return TX_CONTINUE;
425 }
426
427
428
429 if (ieee80211_has_order(hdr->frame_control))
430 return TX_CONTINUE;
431
432 if (ieee80211_is_probe_req(hdr->frame_control))
433 return TX_CONTINUE;
434
435 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
436 info->hw_queue = tx->sdata->vif.cab_queue;
437
438
439 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
440 return TX_CONTINUE;
441
442 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
443
444
445 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
446 return TX_CONTINUE;
447
448
449 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
450 purge_old_ps_buffers(tx->local);
451
452 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
453 ps_dbg(tx->sdata,
454 "BC TX buffer full - dropping the oldest frame\n");
455 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
456 } else
457 tx->local->total_ps_buffered++;
458
459 skb_queue_tail(&ps->bc_buf, tx->skb);
460
461 return TX_QUEUED;
462}
463
464static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
465 struct sk_buff *skb)
466{
467 if (!ieee80211_is_mgmt(fc))
468 return 0;
469
470 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
471 return 0;
472
473 if (!ieee80211_is_robust_mgmt_frame(skb))
474 return 0;
475
476 return 1;
477}
478
479static ieee80211_tx_result
480ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
481{
482 struct sta_info *sta = tx->sta;
483 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
484 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
485 struct ieee80211_local *local = tx->local;
486
487 if (unlikely(!sta))
488 return TX_CONTINUE;
489
490 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
491 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
492 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
493 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
494 int ac = skb_get_queue_mapping(tx->skb);
495
496 if (ieee80211_is_mgmt(hdr->frame_control) &&
497 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
498 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
499 return TX_CONTINUE;
500 }
501
502 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
503 sta->sta.addr, sta->sta.aid, ac);
504 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
505 purge_old_ps_buffers(tx->local);
506
507
508 spin_lock(&sta->ps_lock);
509
510
511
512
513
514 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
515 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
516 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
517 spin_unlock(&sta->ps_lock);
518 return TX_CONTINUE;
519 }
520
521 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
522 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
523 ps_dbg(tx->sdata,
524 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
525 sta->sta.addr, ac);
526 ieee80211_free_txskb(&local->hw, old);
527 } else
528 tx->local->total_ps_buffered++;
529
530 info->control.jiffies = jiffies;
531 info->control.vif = &tx->sdata->vif;
532 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
533 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
534 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
535 spin_unlock(&sta->ps_lock);
536
537 if (!timer_pending(&local->sta_cleanup))
538 mod_timer(&local->sta_cleanup,
539 round_jiffies(jiffies +
540 STA_INFO_CLEANUP_INTERVAL));
541
542
543
544
545
546 sta_info_recalc_tim(sta);
547
548 return TX_QUEUED;
549 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
550 ps_dbg(tx->sdata,
551 "STA %pM in PS mode, but polling/in SP -> send frame\n",
552 sta->sta.addr);
553 }
554
555 return TX_CONTINUE;
556}
557
558static ieee80211_tx_result debug_noinline
559ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
560{
561 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
562 return TX_CONTINUE;
563
564 if (tx->flags & IEEE80211_TX_UNICAST)
565 return ieee80211_tx_h_unicast_ps_buf(tx);
566 else
567 return ieee80211_tx_h_multicast_ps_buf(tx);
568}
569
570static ieee80211_tx_result debug_noinline
571ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
572{
573 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
574
575 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
576 if (tx->sdata->control_port_no_encrypt)
577 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
578 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
579 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
580 }
581
582 return TX_CONTINUE;
583}
584
585static ieee80211_tx_result debug_noinline
586ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
587{
588 struct ieee80211_key *key;
589 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
590 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
591
592 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
593 tx->key = NULL;
594 else if (tx->sta &&
595 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
596 tx->key = key;
597 else if (ieee80211_is_group_privacy_action(tx->skb) &&
598 (key = rcu_dereference(tx->sdata->default_multicast_key)))
599 tx->key = key;
600 else if (ieee80211_is_mgmt(hdr->frame_control) &&
601 is_multicast_ether_addr(hdr->addr1) &&
602 ieee80211_is_robust_mgmt_frame(tx->skb) &&
603 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
604 tx->key = key;
605 else if (is_multicast_ether_addr(hdr->addr1) &&
606 (key = rcu_dereference(tx->sdata->default_multicast_key)))
607 tx->key = key;
608 else if (!is_multicast_ether_addr(hdr->addr1) &&
609 (key = rcu_dereference(tx->sdata->default_unicast_key)))
610 tx->key = key;
611 else
612 tx->key = NULL;
613
614 if (tx->key) {
615 bool skip_hw = false;
616
617
618
619 switch (tx->key->conf.cipher) {
620 case WLAN_CIPHER_SUITE_WEP40:
621 case WLAN_CIPHER_SUITE_WEP104:
622 case WLAN_CIPHER_SUITE_TKIP:
623 if (!ieee80211_is_data_present(hdr->frame_control))
624 tx->key = NULL;
625 break;
626 case WLAN_CIPHER_SUITE_CCMP:
627 case WLAN_CIPHER_SUITE_CCMP_256:
628 case WLAN_CIPHER_SUITE_GCMP:
629 case WLAN_CIPHER_SUITE_GCMP_256:
630 if (!ieee80211_is_data_present(hdr->frame_control) &&
631 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
632 tx->skb) &&
633 !ieee80211_is_group_privacy_action(tx->skb))
634 tx->key = NULL;
635 else
636 skip_hw = (tx->key->conf.flags &
637 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
638 ieee80211_is_mgmt(hdr->frame_control);
639 break;
640 case WLAN_CIPHER_SUITE_AES_CMAC:
641 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
642 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
643 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
644 if (!ieee80211_is_mgmt(hdr->frame_control))
645 tx->key = NULL;
646 break;
647 }
648
649 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
650 !ieee80211_is_deauth(hdr->frame_control)))
651 return TX_DROP;
652
653 if (!skip_hw && tx->key &&
654 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
655 info->control.hw_key = &tx->key->conf;
656 }
657
658 return TX_CONTINUE;
659}
660
661static ieee80211_tx_result debug_noinline
662ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
663{
664 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
665 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
666 struct ieee80211_supported_band *sband;
667 u32 len;
668 struct ieee80211_tx_rate_control txrc;
669 struct ieee80211_sta_rates *ratetbl = NULL;
670 bool assoc = false;
671
672 memset(&txrc, 0, sizeof(txrc));
673
674 sband = tx->local->hw.wiphy->bands[info->band];
675
676 len = min_t(u32, tx->skb->len + FCS_LEN,
677 tx->local->hw.wiphy->frag_threshold);
678
679
680 txrc.hw = &tx->local->hw;
681 txrc.sband = sband;
682 txrc.bss_conf = &tx->sdata->vif.bss_conf;
683 txrc.skb = tx->skb;
684 txrc.reported_rate.idx = -1;
685 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
686
687 if (tx->sdata->rc_has_mcs_mask[info->band])
688 txrc.rate_idx_mcs_mask =
689 tx->sdata->rc_rateidx_mcs_mask[info->band];
690
691 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
692 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
693 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
694 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
695
696
697 if (len > tx->local->hw.wiphy->rts_threshold) {
698 txrc.rts = true;
699 }
700
701 info->control.use_rts = txrc.rts;
702 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
703
704
705
706
707
708
709
710 if (tx->sdata->vif.bss_conf.use_short_preamble &&
711 (ieee80211_is_data(hdr->frame_control) ||
712 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
713 txrc.short_preamble = true;
714
715 info->control.short_preamble = txrc.short_preamble;
716
717
718 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
719 return TX_CONTINUE;
720
721 if (tx->sta)
722 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
723
724
725
726
727
728 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
729 !rate_usable_index_exists(sband, &tx->sta->sta),
730 "%s: Dropped data frame as no usable bitrate found while "
731 "scanning and associated. Target station: "
732 "%pM on %d GHz band\n",
733 tx->sdata->name, hdr->addr1,
734 info->band ? 5 : 2))
735 return TX_DROP;
736
737
738
739
740
741 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
742
743 if (tx->sta && !info->control.skip_table)
744 ratetbl = rcu_dereference(tx->sta->sta.rates);
745
746 if (unlikely(info->control.rates[0].idx < 0)) {
747 if (ratetbl) {
748 struct ieee80211_tx_rate rate = {
749 .idx = ratetbl->rate[0].idx,
750 .flags = ratetbl->rate[0].flags,
751 .count = ratetbl->rate[0].count
752 };
753
754 if (ratetbl->rate[0].idx < 0)
755 return TX_DROP;
756
757 tx->rate = rate;
758 } else {
759 return TX_DROP;
760 }
761 } else {
762 tx->rate = info->control.rates[0];
763 }
764
765 if (txrc.reported_rate.idx < 0) {
766 txrc.reported_rate = tx->rate;
767 if (tx->sta && ieee80211_is_data(hdr->frame_control))
768 tx->sta->tx_stats.last_rate = txrc.reported_rate;
769 } else if (tx->sta)
770 tx->sta->tx_stats.last_rate = txrc.reported_rate;
771
772 if (ratetbl)
773 return TX_CONTINUE;
774
775 if (unlikely(!info->control.rates[0].count))
776 info->control.rates[0].count = 1;
777
778 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
779 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
780 info->control.rates[0].count = 1;
781
782 return TX_CONTINUE;
783}
784
785static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
786{
787 u16 *seq = &sta->tid_seq[tid];
788 __le16 ret = cpu_to_le16(*seq);
789
790
791 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
792
793 return ret;
794}
795
796static ieee80211_tx_result debug_noinline
797ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
798{
799 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
800 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
801 int tid;
802
803
804
805
806
807
808 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
809 return TX_CONTINUE;
810
811 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
812 return TX_CONTINUE;
813
814 if (ieee80211_hdrlen(hdr->frame_control) < 24)
815 return TX_CONTINUE;
816
817 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
818 return TX_CONTINUE;
819
820
821
822
823
824
825
826 if (!ieee80211_is_data_qos(hdr->frame_control) ||
827 is_multicast_ether_addr(hdr->addr1)) {
828 if (tx->flags & IEEE80211_TX_NO_SEQNO)
829 return TX_CONTINUE;
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->flags |= IEEE80211_TX_INTFL_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->flags &= ~IEEE80211_TX_INTFL_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 (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1186 IEEE80211_TX_CTL_INJECTED) ||
1187 tx->sdata->control_port_protocol == tx->skb->protocol) {
1188 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1189 }
1190 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1191 tx->sta = sta_info_get(sdata, hdr->addr1);
1192 }
1193
1194 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
1195 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
1196 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1197 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1198 struct tid_ampdu_tx *tid_tx;
1199
1200 tid = ieee80211_get_tid(hdr);
1201
1202 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1203 if (tid_tx) {
1204 bool queued;
1205
1206 queued = ieee80211_tx_prep_agg(tx, skb, info,
1207 tid_tx, tid);
1208
1209 if (unlikely(queued))
1210 return TX_QUEUED;
1211 }
1212 }
1213
1214 if (is_multicast_ether_addr(hdr->addr1)) {
1215 tx->flags &= ~IEEE80211_TX_UNICAST;
1216 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1217 } else
1218 tx->flags |= IEEE80211_TX_UNICAST;
1219
1220 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1221 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1222 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1223 info->flags & IEEE80211_TX_CTL_AMPDU)
1224 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1225 }
1226
1227 if (!tx->sta)
1228 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1229 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
1230 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1231 ieee80211_check_fast_xmit(tx->sta);
1232 }
1233
1234 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1235
1236 return TX_CONTINUE;
1237}
1238
1239static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1240 struct ieee80211_vif *vif,
1241 struct sta_info *sta,
1242 struct sk_buff *skb)
1243{
1244 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1245 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1246 struct ieee80211_txq *txq = NULL;
1247
1248 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1249 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1250 return NULL;
1251
1252 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1253 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
1254 ieee80211_is_bufferable_mmpdu(hdr->frame_control) ||
1255 vif->type == NL80211_IFTYPE_STATION) &&
1256 sta && sta->uploaded) {
1257
1258
1259
1260
1261 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1262 }
1263 } else if (sta) {
1264 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1265
1266 if (!sta->uploaded)
1267 return NULL;
1268
1269 txq = sta->sta.txq[tid];
1270 } else if (vif) {
1271 txq = vif->txq;
1272 }
1273
1274 if (!txq)
1275 return NULL;
1276
1277 return to_txq_info(txq);
1278}
1279
1280static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1281{
1282 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1283}
1284
1285static u32 codel_skb_len_func(const struct sk_buff *skb)
1286{
1287 return skb->len;
1288}
1289
1290static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1291{
1292 const struct ieee80211_tx_info *info;
1293
1294 info = (const struct ieee80211_tx_info *)skb->cb;
1295 return info->control.enqueue_time;
1296}
1297
1298static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1299 void *ctx)
1300{
1301 struct ieee80211_local *local;
1302 struct txq_info *txqi;
1303 struct fq *fq;
1304 struct fq_flow *flow;
1305
1306 txqi = ctx;
1307 local = vif_to_sdata(txqi->txq.vif)->local;
1308 fq = &local->fq;
1309
1310 if (cvars == &txqi->def_cvars)
1311 flow = &txqi->def_flow;
1312 else
1313 flow = &fq->flows[cvars - local->cvars];
1314
1315 return fq_flow_dequeue(fq, flow);
1316}
1317
1318static void codel_drop_func(struct sk_buff *skb,
1319 void *ctx)
1320{
1321 struct ieee80211_local *local;
1322 struct ieee80211_hw *hw;
1323 struct txq_info *txqi;
1324
1325 txqi = ctx;
1326 local = vif_to_sdata(txqi->txq.vif)->local;
1327 hw = &local->hw;
1328
1329 ieee80211_free_txskb(hw, skb);
1330}
1331
1332static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1333 struct fq_tin *tin,
1334 struct fq_flow *flow)
1335{
1336 struct ieee80211_local *local;
1337 struct txq_info *txqi;
1338 struct codel_vars *cvars;
1339 struct codel_params *cparams;
1340 struct codel_stats *cstats;
1341
1342 local = container_of(fq, struct ieee80211_local, fq);
1343 txqi = container_of(tin, struct txq_info, tin);
1344 cstats = &txqi->cstats;
1345
1346 if (txqi->txq.sta) {
1347 struct sta_info *sta = container_of(txqi->txq.sta,
1348 struct sta_info, sta);
1349 cparams = &sta->cparams;
1350 } else {
1351 cparams = &local->cparams;
1352 }
1353
1354 if (flow == &txqi->def_flow)
1355 cvars = &txqi->def_cvars;
1356 else
1357 cvars = &local->cvars[flow - fq->flows];
1358
1359 return codel_dequeue(txqi,
1360 &flow->backlog,
1361 cparams,
1362 cvars,
1363 cstats,
1364 codel_skb_len_func,
1365 codel_skb_time_func,
1366 codel_drop_func,
1367 codel_dequeue_func);
1368}
1369
1370static void fq_skb_free_func(struct fq *fq,
1371 struct fq_tin *tin,
1372 struct fq_flow *flow,
1373 struct sk_buff *skb)
1374{
1375 struct ieee80211_local *local;
1376
1377 local = container_of(fq, struct ieee80211_local, fq);
1378 ieee80211_free_txskb(&local->hw, skb);
1379}
1380
1381static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1382 struct fq_tin *tin,
1383 int idx,
1384 struct sk_buff *skb)
1385{
1386 struct txq_info *txqi;
1387
1388 txqi = container_of(tin, struct txq_info, tin);
1389 return &txqi->def_flow;
1390}
1391
1392static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1393 struct txq_info *txqi,
1394 struct sk_buff *skb)
1395{
1396 struct fq *fq = &local->fq;
1397 struct fq_tin *tin = &txqi->tin;
1398 u32 flow_idx = fq_flow_idx(fq, skb);
1399
1400 ieee80211_set_skb_enqueue_time(skb);
1401
1402 spin_lock_bh(&fq->lock);
1403 fq_tin_enqueue(fq, tin, flow_idx, skb,
1404 fq_skb_free_func,
1405 fq_flow_get_default_func);
1406 spin_unlock_bh(&fq->lock);
1407}
1408
1409static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1410 struct fq_flow *flow, struct sk_buff *skb,
1411 void *data)
1412{
1413 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1414
1415 return info->control.vif == data;
1416}
1417
1418void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1419 struct ieee80211_sub_if_data *sdata)
1420{
1421 struct fq *fq = &local->fq;
1422 struct txq_info *txqi;
1423 struct fq_tin *tin;
1424 struct ieee80211_sub_if_data *ap;
1425
1426 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1427 return;
1428
1429 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1430
1431 if (!ap->vif.txq)
1432 return;
1433
1434 txqi = to_txq_info(ap->vif.txq);
1435 tin = &txqi->tin;
1436
1437 spin_lock_bh(&fq->lock);
1438 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1439 fq_skb_free_func);
1440 spin_unlock_bh(&fq->lock);
1441}
1442
1443void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1444 struct sta_info *sta,
1445 struct txq_info *txqi, int tid)
1446{
1447 fq_tin_init(&txqi->tin);
1448 fq_flow_init(&txqi->def_flow);
1449 codel_vars_init(&txqi->def_cvars);
1450 codel_stats_init(&txqi->cstats);
1451 __skb_queue_head_init(&txqi->frags);
1452 INIT_LIST_HEAD(&txqi->schedule_order);
1453
1454 txqi->txq.vif = &sdata->vif;
1455
1456 if (!sta) {
1457 sdata->vif.txq = &txqi->txq;
1458 txqi->txq.tid = 0;
1459 txqi->txq.ac = IEEE80211_AC_BE;
1460
1461 return;
1462 }
1463
1464 if (tid == IEEE80211_NUM_TIDS) {
1465 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1466
1467 if (!ieee80211_hw_check(&sdata->local->hw,
1468 STA_MMPDU_TXQ))
1469 return;
1470 } else if (!ieee80211_hw_check(&sdata->local->hw,
1471 BUFF_MMPDU_TXQ)) {
1472
1473 return;
1474 }
1475 txqi->txq.ac = IEEE80211_AC_VO;
1476 } else {
1477 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1478 }
1479
1480 txqi->txq.sta = &sta->sta;
1481 txqi->txq.tid = tid;
1482 sta->sta.txq[tid] = &txqi->txq;
1483}
1484
1485void ieee80211_txq_purge(struct ieee80211_local *local,
1486 struct txq_info *txqi)
1487{
1488 struct fq *fq = &local->fq;
1489 struct fq_tin *tin = &txqi->tin;
1490
1491 spin_lock_bh(&fq->lock);
1492 fq_tin_reset(fq, tin, fq_skb_free_func);
1493 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
1494 spin_unlock_bh(&fq->lock);
1495
1496 spin_lock_bh(&local->active_txq_lock[txqi->txq.ac]);
1497 list_del_init(&txqi->schedule_order);
1498 spin_unlock_bh(&local->active_txq_lock[txqi->txq.ac]);
1499}
1500
1501void ieee80211_txq_set_params(struct ieee80211_local *local)
1502{
1503 if (local->hw.wiphy->txq_limit)
1504 local->fq.limit = local->hw.wiphy->txq_limit;
1505 else
1506 local->hw.wiphy->txq_limit = local->fq.limit;
1507
1508 if (local->hw.wiphy->txq_memory_limit)
1509 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1510 else
1511 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1512
1513 if (local->hw.wiphy->txq_quantum)
1514 local->fq.quantum = local->hw.wiphy->txq_quantum;
1515 else
1516 local->hw.wiphy->txq_quantum = local->fq.quantum;
1517}
1518
1519int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1520{
1521 struct fq *fq = &local->fq;
1522 int ret;
1523 int i;
1524 bool supp_vht = false;
1525 enum nl80211_band band;
1526
1527 if (!local->ops->wake_tx_queue)
1528 return 0;
1529
1530 ret = fq_init(fq, 4096);
1531 if (ret)
1532 return ret;
1533
1534
1535
1536
1537
1538 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1539 struct ieee80211_supported_band *sband;
1540
1541 sband = local->hw.wiphy->bands[band];
1542 if (!sband)
1543 continue;
1544
1545 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1546 }
1547
1548 if (!supp_vht)
1549 fq->memory_limit = 4 << 20;
1550
1551 codel_params_init(&local->cparams);
1552 local->cparams.interval = MS2TIME(100);
1553 local->cparams.target = MS2TIME(20);
1554 local->cparams.ecn = true;
1555
1556 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1557 GFP_KERNEL);
1558 if (!local->cvars) {
1559 spin_lock_bh(&fq->lock);
1560 fq_reset(fq, fq_skb_free_func);
1561 spin_unlock_bh(&fq->lock);
1562 return -ENOMEM;
1563 }
1564
1565 for (i = 0; i < fq->flows_cnt; i++)
1566 codel_vars_init(&local->cvars[i]);
1567
1568 ieee80211_txq_set_params(local);
1569
1570 return 0;
1571}
1572
1573void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1574{
1575 struct fq *fq = &local->fq;
1576
1577 if (!local->ops->wake_tx_queue)
1578 return;
1579
1580 kfree(local->cvars);
1581 local->cvars = NULL;
1582
1583 spin_lock_bh(&fq->lock);
1584 fq_reset(fq, fq_skb_free_func);
1585 spin_unlock_bh(&fq->lock);
1586}
1587
1588static bool ieee80211_queue_skb(struct ieee80211_local *local,
1589 struct ieee80211_sub_if_data *sdata,
1590 struct sta_info *sta,
1591 struct sk_buff *skb)
1592{
1593 struct ieee80211_vif *vif;
1594 struct txq_info *txqi;
1595
1596 if (!local->ops->wake_tx_queue ||
1597 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1598 return false;
1599
1600 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1601 sdata = container_of(sdata->bss,
1602 struct ieee80211_sub_if_data, u.ap);
1603
1604 vif = &sdata->vif;
1605 txqi = ieee80211_get_txq(local, vif, sta, skb);
1606
1607 if (!txqi)
1608 return false;
1609
1610 ieee80211_txq_enqueue(local, txqi, skb);
1611
1612 schedule_and_wake_txq(local, txqi);
1613
1614 return true;
1615}
1616
1617static bool ieee80211_tx_frags(struct ieee80211_local *local,
1618 struct ieee80211_vif *vif,
1619 struct ieee80211_sta *sta,
1620 struct sk_buff_head *skbs,
1621 bool txpending)
1622{
1623 struct ieee80211_tx_control control = {};
1624 struct sk_buff *skb, *tmp;
1625 unsigned long flags;
1626
1627 skb_queue_walk_safe(skbs, skb, tmp) {
1628 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1629 int q = info->hw_queue;
1630
1631#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1632 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1633 __skb_unlink(skb, skbs);
1634 ieee80211_free_txskb(&local->hw, skb);
1635 continue;
1636 }
1637#endif
1638
1639 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1640 if (local->queue_stop_reasons[q] ||
1641 (!txpending && !skb_queue_empty(&local->pending[q]))) {
1642 if (unlikely(info->flags &
1643 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1644 if (local->queue_stop_reasons[q] &
1645 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1646
1647
1648
1649
1650
1651
1652 spin_unlock_irqrestore(
1653 &local->queue_stop_reason_lock,
1654 flags);
1655 ieee80211_purge_tx_queue(&local->hw,
1656 skbs);
1657 return true;
1658 }
1659 } else {
1660
1661
1662
1663
1664
1665
1666 if (txpending)
1667 skb_queue_splice_init(skbs,
1668 &local->pending[q]);
1669 else
1670 skb_queue_splice_tail_init(skbs,
1671 &local->pending[q]);
1672
1673 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1674 flags);
1675 return false;
1676 }
1677 }
1678 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1679
1680 info->control.vif = vif;
1681 control.sta = sta;
1682
1683 __skb_unlink(skb, skbs);
1684 drv_tx(local, &control, skb);
1685 }
1686
1687 return true;
1688}
1689
1690
1691
1692
1693static bool __ieee80211_tx(struct ieee80211_local *local,
1694 struct sk_buff_head *skbs, int led_len,
1695 struct sta_info *sta, bool txpending)
1696{
1697 struct ieee80211_tx_info *info;
1698 struct ieee80211_sub_if_data *sdata;
1699 struct ieee80211_vif *vif;
1700 struct ieee80211_sta *pubsta;
1701 struct sk_buff *skb;
1702 bool result = true;
1703 __le16 fc;
1704
1705 if (WARN_ON(skb_queue_empty(skbs)))
1706 return true;
1707
1708 skb = skb_peek(skbs);
1709 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1710 info = IEEE80211_SKB_CB(skb);
1711 sdata = vif_to_sdata(info->control.vif);
1712 if (sta && !sta->uploaded)
1713 sta = NULL;
1714
1715 if (sta)
1716 pubsta = &sta->sta;
1717 else
1718 pubsta = NULL;
1719
1720 switch (sdata->vif.type) {
1721 case NL80211_IFTYPE_MONITOR:
1722 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1723 vif = &sdata->vif;
1724 break;
1725 }
1726 sdata = rcu_dereference(local->monitor_sdata);
1727 if (sdata) {
1728 vif = &sdata->vif;
1729 info->hw_queue =
1730 vif->hw_queue[skb_get_queue_mapping(skb)];
1731 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1732 ieee80211_purge_tx_queue(&local->hw, skbs);
1733 return true;
1734 } else
1735 vif = NULL;
1736 break;
1737 case NL80211_IFTYPE_AP_VLAN:
1738 sdata = container_of(sdata->bss,
1739 struct ieee80211_sub_if_data, u.ap);
1740
1741 default:
1742 vif = &sdata->vif;
1743 break;
1744 }
1745
1746 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1747 txpending);
1748
1749 ieee80211_tpt_led_trig_tx(local, fc, led_len);
1750
1751 WARN_ON_ONCE(!skb_queue_empty(skbs));
1752
1753 return result;
1754}
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1765{
1766 ieee80211_tx_result res = TX_DROP;
1767
1768#define CALL_TXH(txh) \
1769 do { \
1770 res = txh(tx); \
1771 if (res != TX_CONTINUE) \
1772 goto txh_done; \
1773 } while (0)
1774
1775 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1776 CALL_TXH(ieee80211_tx_h_check_assoc);
1777 CALL_TXH(ieee80211_tx_h_ps_buf);
1778 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1779 CALL_TXH(ieee80211_tx_h_select_key);
1780 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1781 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1782
1783 txh_done:
1784 if (unlikely(res == TX_DROP)) {
1785 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1786 if (tx->skb)
1787 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1788 else
1789 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1790 return -1;
1791 } else if (unlikely(res == TX_QUEUED)) {
1792 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1793 return -1;
1794 }
1795
1796 return 0;
1797}
1798
1799
1800
1801
1802
1803static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1804{
1805 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1806 ieee80211_tx_result res = TX_CONTINUE;
1807
1808 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1809 __skb_queue_tail(&tx->skbs, tx->skb);
1810 tx->skb = NULL;
1811 goto txh_done;
1812 }
1813
1814 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1815 CALL_TXH(ieee80211_tx_h_sequence);
1816 CALL_TXH(ieee80211_tx_h_fragment);
1817
1818 CALL_TXH(ieee80211_tx_h_stats);
1819 CALL_TXH(ieee80211_tx_h_encrypt);
1820 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1821 CALL_TXH(ieee80211_tx_h_calculate_duration);
1822#undef CALL_TXH
1823
1824 txh_done:
1825 if (unlikely(res == TX_DROP)) {
1826 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1827 if (tx->skb)
1828 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1829 else
1830 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1831 return -1;
1832 } else if (unlikely(res == TX_QUEUED)) {
1833 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1834 return -1;
1835 }
1836
1837 return 0;
1838}
1839
1840static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1841{
1842 int r = invoke_tx_handlers_early(tx);
1843
1844 if (r)
1845 return r;
1846 return invoke_tx_handlers_late(tx);
1847}
1848
1849bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1850 struct ieee80211_vif *vif, struct sk_buff *skb,
1851 int band, struct ieee80211_sta **sta)
1852{
1853 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1854 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1855 struct ieee80211_tx_data tx;
1856 struct sk_buff *skb2;
1857
1858 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
1859 return false;
1860
1861 info->band = band;
1862 info->control.vif = vif;
1863 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1864
1865 if (invoke_tx_handlers(&tx))
1866 return false;
1867
1868 if (sta) {
1869 if (tx.sta)
1870 *sta = &tx.sta->sta;
1871 else
1872 *sta = NULL;
1873 }
1874
1875
1876 skb2 = __skb_dequeue(&tx.skbs);
1877 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1878 ieee80211_free_txskb(hw, skb2);
1879 ieee80211_purge_tx_queue(hw, &tx.skbs);
1880 return false;
1881 }
1882
1883 return true;
1884}
1885EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1886
1887
1888
1889
1890static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1891 struct sta_info *sta, struct sk_buff *skb,
1892 bool txpending, u32 txdata_flags)
1893{
1894 struct ieee80211_local *local = sdata->local;
1895 struct ieee80211_tx_data tx;
1896 ieee80211_tx_result res_prepare;
1897 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1898 bool result = true;
1899 int led_len;
1900
1901 if (unlikely(skb->len < 10)) {
1902 dev_kfree_skb(skb);
1903 return true;
1904 }
1905
1906
1907 led_len = skb->len;
1908 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
1909
1910 tx.flags |= txdata_flags;
1911
1912 if (unlikely(res_prepare == TX_DROP)) {
1913 ieee80211_free_txskb(&local->hw, skb);
1914 return true;
1915 } else if (unlikely(res_prepare == TX_QUEUED)) {
1916 return true;
1917 }
1918
1919
1920 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1921 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1922 info->hw_queue =
1923 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1924
1925 if (invoke_tx_handlers_early(&tx))
1926 return true;
1927
1928 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1929 return true;
1930
1931 if (!invoke_tx_handlers_late(&tx))
1932 result = __ieee80211_tx(local, &tx.skbs, led_len,
1933 tx.sta, txpending);
1934
1935 return result;
1936}
1937
1938
1939
1940static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1941 struct sk_buff *skb,
1942 int head_need, bool may_encrypt)
1943{
1944 struct ieee80211_local *local = sdata->local;
1945 struct ieee80211_hdr *hdr;
1946 bool enc_tailroom;
1947 int tail_need = 0;
1948
1949 hdr = (struct ieee80211_hdr *) skb->data;
1950 enc_tailroom = may_encrypt &&
1951 (sdata->crypto_tx_tailroom_needed_cnt ||
1952 ieee80211_is_mgmt(hdr->frame_control));
1953
1954 if (enc_tailroom) {
1955 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1956 tail_need -= skb_tailroom(skb);
1957 tail_need = max_t(int, tail_need, 0);
1958 }
1959
1960 if (skb_cloned(skb) &&
1961 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1962 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
1963 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1964 else if (head_need || tail_need)
1965 I802_DEBUG_INC(local->tx_expand_skb_head);
1966 else
1967 return 0;
1968
1969 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
1970 wiphy_debug(local->hw.wiphy,
1971 "failed to reallocate TX buffer\n");
1972 return -ENOMEM;
1973 }
1974
1975 return 0;
1976}
1977
1978void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1979 struct sta_info *sta, struct sk_buff *skb,
1980 u32 txdata_flags)
1981{
1982 struct ieee80211_local *local = sdata->local;
1983 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1984 struct ieee80211_hdr *hdr;
1985 int headroom;
1986 bool may_encrypt;
1987
1988 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
1989
1990 headroom = local->tx_headroom;
1991 if (may_encrypt)
1992 headroom += sdata->encrypt_headroom;
1993 headroom -= skb_headroom(skb);
1994 headroom = max_t(int, 0, headroom);
1995
1996 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
1997 ieee80211_free_txskb(&local->hw, skb);
1998 return;
1999 }
2000
2001 hdr = (struct ieee80211_hdr *) skb->data;
2002 info->control.vif = &sdata->vif;
2003
2004 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2005 if (ieee80211_is_data(hdr->frame_control) &&
2006 is_unicast_ether_addr(hdr->addr1)) {
2007 if (mesh_nexthop_resolve(sdata, skb))
2008 return;
2009 } else {
2010 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2011 }
2012 }
2013
2014 ieee80211_set_qos_hdr(sdata, skb);
2015 ieee80211_tx(sdata, sta, skb, false, txdata_flags);
2016}
2017
2018static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
2019 struct sk_buff *skb)
2020{
2021 struct ieee80211_radiotap_iterator iterator;
2022 struct ieee80211_radiotap_header *rthdr =
2023 (struct ieee80211_radiotap_header *) skb->data;
2024 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2025 struct ieee80211_supported_band *sband =
2026 local->hw.wiphy->bands[info->band];
2027 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2028 NULL);
2029 u16 txflags;
2030 u16 rate = 0;
2031 bool rate_found = false;
2032 u8 rate_retries = 0;
2033 u16 rate_flags = 0;
2034 u8 mcs_known, mcs_flags, mcs_bw;
2035 u16 vht_known;
2036 u8 vht_mcs = 0, vht_nss = 0;
2037 int i;
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 break;
2087
2088 case IEEE80211_RADIOTAP_RATE:
2089 rate = *iterator.this_arg;
2090 rate_flags = 0;
2091 rate_found = true;
2092 break;
2093
2094 case IEEE80211_RADIOTAP_DATA_RETRIES:
2095 rate_retries = *iterator.this_arg;
2096 break;
2097
2098 case IEEE80211_RADIOTAP_MCS:
2099 mcs_known = iterator.this_arg[0];
2100 mcs_flags = iterator.this_arg[1];
2101 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2102 break;
2103
2104 rate_found = true;
2105 rate = iterator.this_arg[2];
2106 rate_flags = IEEE80211_TX_RC_MCS;
2107
2108 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2109 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2110 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2111
2112 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2113 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2114 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2115 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2116 break;
2117
2118 case IEEE80211_RADIOTAP_VHT:
2119 vht_known = get_unaligned_le16(iterator.this_arg);
2120 rate_found = true;
2121
2122 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2123 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2124 (iterator.this_arg[2] &
2125 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2126 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2127 if (vht_known &
2128 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2129 if (iterator.this_arg[3] == 1)
2130 rate_flags |=
2131 IEEE80211_TX_RC_40_MHZ_WIDTH;
2132 else if (iterator.this_arg[3] == 4)
2133 rate_flags |=
2134 IEEE80211_TX_RC_80_MHZ_WIDTH;
2135 else if (iterator.this_arg[3] == 11)
2136 rate_flags |=
2137 IEEE80211_TX_RC_160_MHZ_WIDTH;
2138 }
2139
2140 vht_mcs = iterator.this_arg[4] >> 4;
2141 vht_nss = iterator.this_arg[4] & 0xF;
2142 break;
2143
2144
2145
2146
2147
2148
2149
2150 default:
2151 break;
2152 }
2153 }
2154
2155 if (ret != -ENOENT)
2156 return false;
2157
2158 if (rate_found) {
2159 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2160
2161 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2162 info->control.rates[i].idx = -1;
2163 info->control.rates[i].flags = 0;
2164 info->control.rates[i].count = 0;
2165 }
2166
2167 if (rate_flags & IEEE80211_TX_RC_MCS) {
2168 info->control.rates[0].idx = rate;
2169 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2170 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2171 vht_nss);
2172 } else {
2173 for (i = 0; i < sband->n_bitrates; i++) {
2174 if (rate * 5 != sband->bitrates[i].bitrate)
2175 continue;
2176
2177 info->control.rates[0].idx = i;
2178 break;
2179 }
2180 }
2181
2182 if (info->control.rates[0].idx < 0)
2183 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2184
2185 info->control.rates[0].flags = rate_flags;
2186 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2187 local->hw.max_rate_tries);
2188 }
2189
2190
2191
2192
2193
2194
2195 skb_pull(skb, iterator._max_length);
2196
2197 return true;
2198}
2199
2200netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2201 struct net_device *dev)
2202{
2203 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2204 struct ieee80211_chanctx_conf *chanctx_conf;
2205 struct ieee80211_radiotap_header *prthdr =
2206 (struct ieee80211_radiotap_header *)skb->data;
2207 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2208 struct ieee80211_hdr *hdr;
2209 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2210 struct cfg80211_chan_def *chandef;
2211 u16 len_rthdr;
2212 int hdrlen;
2213
2214
2215 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2216 goto fail;
2217
2218
2219 if (unlikely(prthdr->it_version))
2220 goto fail;
2221
2222
2223 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2224
2225
2226 if (unlikely(skb->len < len_rthdr))
2227 goto fail;
2228
2229
2230
2231
2232
2233
2234
2235 skb_set_mac_header(skb, len_rthdr);
2236
2237
2238
2239
2240 skb_set_network_header(skb, len_rthdr);
2241 skb_set_transport_header(skb, len_rthdr);
2242
2243 if (skb->len < len_rthdr + 2)
2244 goto fail;
2245
2246 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2247 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2248
2249 if (skb->len < len_rthdr + hdrlen)
2250 goto fail;
2251
2252
2253
2254
2255
2256 if (ieee80211_is_data(hdr->frame_control) &&
2257 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2258 u8 *payload = (u8 *)hdr + hdrlen;
2259
2260 if (ether_addr_equal(payload, rfc1042_header))
2261 skb->protocol = cpu_to_be16((payload[6] << 8) |
2262 payload[7]);
2263 }
2264
2265 memset(info, 0, sizeof(*info));
2266
2267 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2268 IEEE80211_TX_CTL_INJECTED;
2269
2270 rcu_read_lock();
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2281
2282 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2283 if (!ieee80211_sdata_running(tmp_sdata))
2284 continue;
2285 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2286 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2287 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2288 continue;
2289 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
2290 sdata = tmp_sdata;
2291 break;
2292 }
2293 }
2294
2295 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2296 if (!chanctx_conf) {
2297 tmp_sdata = rcu_dereference(local->monitor_sdata);
2298 if (tmp_sdata)
2299 chanctx_conf =
2300 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2301 }
2302
2303 if (chanctx_conf)
2304 chandef = &chanctx_conf->def;
2305 else if (!local->use_chanctx)
2306 chandef = &local->_oper_chandef;
2307 else
2308 goto fail_rcu;
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2327 sdata->vif.type))
2328 goto fail_rcu;
2329
2330 info->band = chandef->chan->band;
2331
2332
2333 if (!ieee80211_parse_tx_radiotap(local, skb))
2334 goto fail_rcu;
2335
2336 ieee80211_xmit(sdata, NULL, skb, 0);
2337 rcu_read_unlock();
2338
2339 return NETDEV_TX_OK;
2340
2341fail_rcu:
2342 rcu_read_unlock();
2343fail:
2344 dev_kfree_skb(skb);
2345 return NETDEV_TX_OK;
2346}
2347
2348static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2349{
2350 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2351
2352 return ethertype == ETH_P_TDLS &&
2353 skb->len > 14 &&
2354 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2355}
2356
2357static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2358 struct sk_buff *skb,
2359 struct sta_info **sta_out)
2360{
2361 struct sta_info *sta;
2362
2363 switch (sdata->vif.type) {
2364 case NL80211_IFTYPE_AP_VLAN:
2365 sta = rcu_dereference(sdata->u.vlan.sta);
2366 if (sta) {
2367 *sta_out = sta;
2368 return 0;
2369 } else if (sdata->wdev.use_4addr) {
2370 return -ENOLINK;
2371 }
2372
2373 case NL80211_IFTYPE_AP:
2374 case NL80211_IFTYPE_OCB:
2375 case NL80211_IFTYPE_ADHOC:
2376 if (is_multicast_ether_addr(skb->data)) {
2377 *sta_out = ERR_PTR(-ENOENT);
2378 return 0;
2379 }
2380 sta = sta_info_get_bss(sdata, skb->data);
2381 break;
2382 case NL80211_IFTYPE_WDS:
2383 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2384 break;
2385#ifdef CONFIG_MAC80211_MESH
2386 case NL80211_IFTYPE_MESH_POINT:
2387
2388 *sta_out = NULL;
2389 return 0;
2390#endif
2391 case NL80211_IFTYPE_STATION:
2392 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2393 sta = sta_info_get(sdata, skb->data);
2394 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2395 if (test_sta_flag(sta,
2396 WLAN_STA_TDLS_PEER_AUTH)) {
2397 *sta_out = sta;
2398 return 0;
2399 }
2400
2401
2402
2403
2404
2405
2406
2407
2408 if (!ieee80211_is_tdls_setup(skb))
2409 return -EINVAL;
2410 }
2411
2412 }
2413
2414 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2415 if (!sta)
2416 return -ENOLINK;
2417 break;
2418 default:
2419 return -EINVAL;
2420 }
2421
2422 *sta_out = sta ?: ERR_PTR(-ENOENT);
2423 return 0;
2424}
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2446 struct sk_buff *skb, u32 info_flags,
2447 struct sta_info *sta, u32 ctrl_flags)
2448{
2449 struct ieee80211_local *local = sdata->local;
2450 struct ieee80211_tx_info *info;
2451 int head_need;
2452 u16 ethertype, hdrlen, meshhdrlen = 0;
2453 __le16 fc;
2454 struct ieee80211_hdr hdr;
2455 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2456 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2457 const u8 *encaps_data;
2458 int encaps_len, skip_header_bytes;
2459 bool wme_sta = false, authorized = false;
2460 bool tdls_peer;
2461 bool multicast;
2462 u16 info_id = 0;
2463 struct ieee80211_chanctx_conf *chanctx_conf;
2464 struct ieee80211_sub_if_data *ap_sdata;
2465 enum nl80211_band band;
2466 int ret;
2467
2468 if (IS_ERR(sta))
2469 sta = NULL;
2470
2471#ifdef CONFIG_MAC80211_DEBUGFS
2472 if (local->force_tx_status)
2473 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2474#endif
2475
2476
2477
2478 ethertype = (skb->data[12] << 8) | skb->data[13];
2479 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2480
2481 switch (sdata->vif.type) {
2482 case NL80211_IFTYPE_AP_VLAN:
2483 if (sdata->wdev.use_4addr) {
2484 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2485
2486 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2487 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2488 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2489 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2490 hdrlen = 30;
2491 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2492 wme_sta = sta->sta.wme;
2493 }
2494 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2495 u.ap);
2496 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
2497 if (!chanctx_conf) {
2498 ret = -ENOTCONN;
2499 goto free;
2500 }
2501 band = chanctx_conf->def.chan->band;
2502 if (sdata->wdev.use_4addr)
2503 break;
2504
2505 case NL80211_IFTYPE_AP:
2506 if (sdata->vif.type == NL80211_IFTYPE_AP)
2507 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2508 if (!chanctx_conf) {
2509 ret = -ENOTCONN;
2510 goto free;
2511 }
2512 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2513
2514 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2515 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2516 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2517 hdrlen = 24;
2518 band = chanctx_conf->def.chan->band;
2519 break;
2520 case NL80211_IFTYPE_WDS:
2521 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2522
2523 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
2524 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2525 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2526 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2527 hdrlen = 30;
2528
2529
2530
2531
2532 band = local->hw.conf.chandef.chan->band;
2533 break;
2534#ifdef CONFIG_MAC80211_MESH
2535 case NL80211_IFTYPE_MESH_POINT:
2536 if (!is_multicast_ether_addr(skb->data)) {
2537 struct sta_info *next_hop;
2538 bool mpp_lookup = true;
2539
2540 mpath = mesh_path_lookup(sdata, skb->data);
2541 if (mpath) {
2542 mpp_lookup = false;
2543 next_hop = rcu_dereference(mpath->next_hop);
2544 if (!next_hop ||
2545 !(mpath->flags & (MESH_PATH_ACTIVE |
2546 MESH_PATH_RESOLVING)))
2547 mpp_lookup = true;
2548 }
2549
2550 if (mpp_lookup) {
2551 mppath = mpp_path_lookup(sdata, skb->data);
2552 if (mppath)
2553 mppath->exp_time = jiffies;
2554 }
2555
2556 if (mppath && mpath)
2557 mesh_path_del(sdata, mpath->dst);
2558 }
2559
2560
2561
2562
2563
2564
2565
2566 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2567 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
2568 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2569 skb->data, skb->data + ETH_ALEN);
2570 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2571 NULL, NULL);
2572 } else {
2573
2574
2575
2576
2577
2578
2579 const u8 *mesh_da = skb->data;
2580
2581 if (mppath)
2582 mesh_da = mppath->mpp;
2583 else if (mpath)
2584 mesh_da = mpath->dst;
2585
2586 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2587 mesh_da, sdata->vif.addr);
2588 if (is_multicast_ether_addr(mesh_da))
2589
2590 meshhdrlen = ieee80211_new_mesh_header(
2591 sdata, &mesh_hdr,
2592 skb->data + ETH_ALEN, NULL);
2593 else
2594
2595 meshhdrlen = ieee80211_new_mesh_header(
2596 sdata, &mesh_hdr, skb->data,
2597 skb->data + ETH_ALEN);
2598
2599 }
2600 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2601 if (!chanctx_conf) {
2602 ret = -ENOTCONN;
2603 goto free;
2604 }
2605 band = chanctx_conf->def.chan->band;
2606
2607
2608
2609
2610 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2611 is_zero_ether_addr(hdr.addr1))
2612 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2613 break;
2614#endif
2615 case NL80211_IFTYPE_STATION:
2616
2617 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
2618
2619 if (tdls_peer) {
2620
2621 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2622 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2623 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2624 hdrlen = 24;
2625 } else if (sdata->u.mgd.use_4addr &&
2626 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2627 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2628 IEEE80211_FCTL_TODS);
2629
2630 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2631 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2632 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2633 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2634 hdrlen = 30;
2635 } else {
2636 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2637
2638 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2639 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2640 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2641 hdrlen = 24;
2642 }
2643 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2644 if (!chanctx_conf) {
2645 ret = -ENOTCONN;
2646 goto free;
2647 }
2648 band = chanctx_conf->def.chan->band;
2649 break;
2650 case NL80211_IFTYPE_OCB:
2651
2652 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2653 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2654 eth_broadcast_addr(hdr.addr3);
2655 hdrlen = 24;
2656 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2657 if (!chanctx_conf) {
2658 ret = -ENOTCONN;
2659 goto free;
2660 }
2661 band = chanctx_conf->def.chan->band;
2662 break;
2663 case NL80211_IFTYPE_ADHOC:
2664
2665 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2666 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2667 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2668 hdrlen = 24;
2669 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2670 if (!chanctx_conf) {
2671 ret = -ENOTCONN;
2672 goto free;
2673 }
2674 band = chanctx_conf->def.chan->band;
2675 break;
2676 default:
2677 ret = -EINVAL;
2678 goto free;
2679 }
2680
2681 multicast = is_multicast_ether_addr(hdr.addr1);
2682
2683
2684 if (sta) {
2685 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2686 wme_sta = sta->sta.wme;
2687 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2688
2689 wme_sta = true;
2690 }
2691
2692
2693 if (wme_sta) {
2694 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2695 hdrlen += 2;
2696 }
2697
2698
2699
2700
2701
2702 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2703 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2704 !multicast && !authorized &&
2705 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2706 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
2707#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2708 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2709 sdata->name, hdr.addr1);
2710#endif
2711
2712 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2713
2714 ret = -EPERM;
2715 goto free;
2716 }
2717
2718 if (unlikely(!multicast && skb->sk &&
2719 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
2720 struct sk_buff *ack_skb = skb_clone_sk(skb);
2721
2722 if (ack_skb) {
2723 unsigned long flags;
2724 int id;
2725
2726 spin_lock_irqsave(&local->ack_status_lock, flags);
2727 id = idr_alloc(&local->ack_status_frames, ack_skb,
2728 1, 0x10000, GFP_ATOMIC);
2729 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2730
2731 if (id >= 0) {
2732 info_id = id;
2733 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2734 } else {
2735 kfree_skb(ack_skb);
2736 }
2737 }
2738 }
2739
2740
2741
2742
2743 if (skb_shared(skb)) {
2744 struct sk_buff *tmp_skb = skb;
2745
2746
2747 WARN_ON(info_id);
2748
2749 skb = skb_clone(skb, GFP_ATOMIC);
2750 kfree_skb(tmp_skb);
2751
2752 if (!skb) {
2753 ret = -ENOMEM;
2754 goto free;
2755 }
2756 }
2757
2758 hdr.frame_control = fc;
2759 hdr.duration_id = 0;
2760 hdr.seq_ctrl = 0;
2761
2762 skip_header_bytes = ETH_HLEN;
2763 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2764 encaps_data = bridge_tunnel_header;
2765 encaps_len = sizeof(bridge_tunnel_header);
2766 skip_header_bytes -= 2;
2767 } else if (ethertype >= ETH_P_802_3_MIN) {
2768 encaps_data = rfc1042_header;
2769 encaps_len = sizeof(rfc1042_header);
2770 skip_header_bytes -= 2;
2771 } else {
2772 encaps_data = NULL;
2773 encaps_len = 0;
2774 }
2775
2776 skb_pull(skb, skip_header_bytes);
2777 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791 if (head_need > 0 || skb_cloned(skb)) {
2792 head_need += sdata->encrypt_headroom;
2793 head_need += local->tx_headroom;
2794 head_need = max_t(int, 0, head_need);
2795 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2796 ieee80211_free_txskb(&local->hw, skb);
2797 skb = NULL;
2798 return ERR_PTR(-ENOMEM);
2799 }
2800 }
2801
2802 if (encaps_data)
2803 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2804
2805#ifdef CONFIG_MAC80211_MESH
2806 if (meshhdrlen > 0)
2807 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2808#endif
2809
2810 if (ieee80211_is_data_qos(fc)) {
2811 __le16 *qos_control;
2812
2813 qos_control = skb_push(skb, 2);
2814 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2815
2816
2817
2818
2819 *qos_control = 0;
2820 } else
2821 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2822
2823 skb_reset_mac_header(skb);
2824
2825 info = IEEE80211_SKB_CB(skb);
2826 memset(info, 0, sizeof(*info));
2827
2828 info->flags = info_flags;
2829 info->ack_frame_id = info_id;
2830 info->band = band;
2831 info->control.flags = ctrl_flags;
2832
2833 return skb;
2834 free:
2835 kfree_skb(skb);
2836 return ERR_PTR(ret);
2837}
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860void ieee80211_check_fast_xmit(struct sta_info *sta)
2861{
2862 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2863 struct ieee80211_local *local = sta->local;
2864 struct ieee80211_sub_if_data *sdata = sta->sdata;
2865 struct ieee80211_hdr *hdr = (void *)build.hdr;
2866 struct ieee80211_chanctx_conf *chanctx_conf;
2867 __le16 fc;
2868
2869 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
2870 return;
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884 spin_lock_bh(&sta->lock);
2885 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2886 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2887 sdata->vif.type == NL80211_IFTYPE_STATION)
2888 goto out;
2889
2890 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2891 goto out;
2892
2893 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2894 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2895 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2896 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
2897 goto out;
2898
2899 if (sdata->noack_map)
2900 goto out;
2901
2902
2903 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2904 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
2905 goto out;
2906
2907 rcu_read_lock();
2908 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2909 if (!chanctx_conf) {
2910 rcu_read_unlock();
2911 goto out;
2912 }
2913 build.band = chanctx_conf->def.chan->band;
2914 rcu_read_unlock();
2915
2916 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2917
2918 switch (sdata->vif.type) {
2919 case NL80211_IFTYPE_ADHOC:
2920
2921 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2922 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2923 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2924 build.hdr_len = 24;
2925 break;
2926 case NL80211_IFTYPE_STATION:
2927 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2928
2929 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2930 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2931 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2932 build.hdr_len = 24;
2933 break;
2934 }
2935
2936 if (sdata->u.mgd.use_4addr) {
2937
2938 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2939 IEEE80211_FCTL_TODS);
2940
2941 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2942 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2943 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2944 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2945 build.hdr_len = 30;
2946 break;
2947 }
2948 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2949
2950 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2951 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2952 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2953 build.hdr_len = 24;
2954 break;
2955 case NL80211_IFTYPE_AP_VLAN:
2956 if (sdata->wdev.use_4addr) {
2957 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2958 IEEE80211_FCTL_TODS);
2959
2960 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2961 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2962 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2963 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2964 build.hdr_len = 30;
2965 break;
2966 }
2967
2968 case NL80211_IFTYPE_AP:
2969 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2970
2971 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2972 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2973 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2974 build.hdr_len = 24;
2975 break;
2976 default:
2977
2978 goto out;
2979 }
2980
2981 if (sta->sta.wme) {
2982 build.hdr_len += 2;
2983 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2984 }
2985
2986
2987
2988
2989
2990
2991 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2992 if (!build.key)
2993 build.key = rcu_access_pointer(sdata->default_unicast_key);
2994 if (build.key) {
2995 bool gen_iv, iv_spc, mmic;
2996
2997 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2998 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2999 mmic = build.key->conf.flags &
3000 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3001 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3002
3003
3004 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3005 goto out;
3006
3007
3008 if (build.key->flags & KEY_FLAG_TAINTED)
3009 goto out;
3010
3011 switch (build.key->conf.cipher) {
3012 case WLAN_CIPHER_SUITE_CCMP:
3013 case WLAN_CIPHER_SUITE_CCMP_256:
3014 if (gen_iv)
3015 build.pn_offs = build.hdr_len;
3016 if (gen_iv || iv_spc)
3017 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3018 break;
3019 case WLAN_CIPHER_SUITE_GCMP:
3020 case WLAN_CIPHER_SUITE_GCMP_256:
3021 if (gen_iv)
3022 build.pn_offs = build.hdr_len;
3023 if (gen_iv || iv_spc)
3024 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3025 break;
3026 case WLAN_CIPHER_SUITE_TKIP:
3027
3028 if (mmic || gen_iv)
3029 goto out;
3030 if (iv_spc)
3031 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3032 break;
3033 case WLAN_CIPHER_SUITE_WEP40:
3034 case WLAN_CIPHER_SUITE_WEP104:
3035
3036 if (gen_iv)
3037 goto out;
3038 if (iv_spc)
3039 build.hdr_len += IEEE80211_WEP_IV_LEN;
3040 break;
3041 case WLAN_CIPHER_SUITE_AES_CMAC:
3042 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3043 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3044 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3045 WARN(1,
3046 "management cipher suite 0x%x enabled for data\n",
3047 build.key->conf.cipher);
3048 goto out;
3049 default:
3050
3051 if (WARN_ON(gen_iv))
3052 goto out;
3053
3054 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3055 break;
3056
3057 if (iv_spc &&
3058 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3059 goto out;
3060 if (iv_spc)
3061 build.hdr_len += build.key->conf.iv_len;
3062 }
3063
3064 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3065 }
3066
3067 hdr->frame_control = fc;
3068
3069 memcpy(build.hdr + build.hdr_len,
3070 rfc1042_header, sizeof(rfc1042_header));
3071 build.hdr_len += sizeof(rfc1042_header);
3072
3073 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3074
3075 if (!fast_tx)
3076 goto out;
3077
3078 out:
3079
3080 old = rcu_dereference_protected(sta->fast_tx,
3081 lockdep_is_held(&sta->lock));
3082 rcu_assign_pointer(sta->fast_tx, fast_tx);
3083 if (old)
3084 kfree_rcu(old, rcu_head);
3085 spin_unlock_bh(&sta->lock);
3086}
3087
3088void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3089{
3090 struct sta_info *sta;
3091
3092 rcu_read_lock();
3093 list_for_each_entry_rcu(sta, &local->sta_list, list)
3094 ieee80211_check_fast_xmit(sta);
3095 rcu_read_unlock();
3096}
3097
3098void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3099{
3100 struct ieee80211_local *local = sdata->local;
3101 struct sta_info *sta;
3102
3103 rcu_read_lock();
3104
3105 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3106 if (sdata != sta->sdata &&
3107 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3108 continue;
3109 ieee80211_check_fast_xmit(sta);
3110 }
3111
3112 rcu_read_unlock();
3113}
3114
3115void ieee80211_clear_fast_xmit(struct sta_info *sta)
3116{
3117 struct ieee80211_fast_tx *fast_tx;
3118
3119 spin_lock_bh(&sta->lock);
3120 fast_tx = rcu_dereference_protected(sta->fast_tx,
3121 lockdep_is_held(&sta->lock));
3122 RCU_INIT_POINTER(sta->fast_tx, NULL);
3123 spin_unlock_bh(&sta->lock);
3124
3125 if (fast_tx)
3126 kfree_rcu(fast_tx, rcu_head);
3127}
3128
3129static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3130 struct sk_buff *skb, int headroom)
3131{
3132 if (skb_headroom(skb) < headroom) {
3133 I802_DEBUG_INC(local->tx_expand_skb_head);
3134
3135 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
3136 wiphy_debug(local->hw.wiphy,
3137 "failed to reallocate TX buffer\n");
3138 return false;
3139 }
3140 }
3141
3142 return true;
3143}
3144
3145static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3146 struct ieee80211_fast_tx *fast_tx,
3147 struct sk_buff *skb)
3148{
3149 struct ieee80211_local *local = sdata->local;
3150 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3151 struct ieee80211_hdr *hdr;
3152 struct ethhdr *amsdu_hdr;
3153 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3154 int subframe_len = skb->len - hdr_len;
3155 void *data;
3156 u8 *qc, *h_80211_src, *h_80211_dst;
3157 const u8 *bssid;
3158
3159 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3160 return false;
3161
3162 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3163 return true;
3164
3165 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr)))
3166 return false;
3167
3168 data = skb_push(skb, sizeof(*amsdu_hdr));
3169 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3170 hdr = data;
3171 amsdu_hdr = data + hdr_len;
3172
3173 h_80211_src = data + fast_tx->sa_offs;
3174 h_80211_dst = data + fast_tx->da_offs;
3175
3176 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3177 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3178 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3179
3180
3181
3182
3183
3184 switch (sdata->vif.type) {
3185 case NL80211_IFTYPE_STATION:
3186 bssid = sdata->u.mgd.bssid;
3187 break;
3188 case NL80211_IFTYPE_AP:
3189 case NL80211_IFTYPE_AP_VLAN:
3190 bssid = sdata->vif.addr;
3191 break;
3192 default:
3193 bssid = NULL;
3194 }
3195
3196 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3197 ether_addr_copy(h_80211_src, bssid);
3198
3199 if (bssid && ieee80211_has_tods(hdr->frame_control))
3200 ether_addr_copy(h_80211_dst, bssid);
3201
3202 qc = ieee80211_get_qos_ctl(hdr);
3203 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3204
3205 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3206
3207 return true;
3208}
3209
3210static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3211 struct sta_info *sta,
3212 struct ieee80211_fast_tx *fast_tx,
3213 struct sk_buff *skb)
3214{
3215 struct ieee80211_local *local = sdata->local;
3216 struct fq *fq = &local->fq;
3217 struct fq_tin *tin;
3218 struct fq_flow *flow;
3219 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3220 struct ieee80211_txq *txq = sta->sta.txq[tid];
3221 struct txq_info *txqi;
3222 struct sk_buff **frag_tail, *head;
3223 int subframe_len = skb->len - ETH_ALEN;
3224 u8 max_subframes = sta->sta.max_amsdu_subframes;
3225 int max_frags = local->hw.max_tx_fragments;
3226 int max_amsdu_len = sta->sta.max_amsdu_len;
3227 int orig_truesize;
3228 u32 flow_idx;
3229 __be16 len;
3230 void *data;
3231 bool ret = false;
3232 unsigned int orig_len;
3233 int n = 2, nfrags, pad = 0;
3234 u16 hdrlen;
3235
3236 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3237 return false;
3238
3239 if (skb_is_gso(skb))
3240 return false;
3241
3242 if (!txq)
3243 return false;
3244
3245 txqi = to_txq_info(txq);
3246 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3247 return false;
3248
3249 if (sta->sta.max_rc_amsdu_len)
3250 max_amsdu_len = min_t(int, max_amsdu_len,
3251 sta->sta.max_rc_amsdu_len);
3252
3253 if (sta->sta.max_tid_amsdu_len[tid])
3254 max_amsdu_len = min_t(int, max_amsdu_len,
3255 sta->sta.max_tid_amsdu_len[tid]);
3256
3257 flow_idx = fq_flow_idx(fq, skb);
3258
3259 spin_lock_bh(&fq->lock);
3260
3261
3262
3263
3264
3265 tin = &txqi->tin;
3266 flow = fq_flow_classify(fq, tin, flow_idx, skb,
3267 fq_flow_get_default_func);
3268 head = skb_peek_tail(&flow->queue);
3269 if (!head || skb_is_gso(head))
3270 goto out;
3271
3272 orig_truesize = head->truesize;
3273 orig_len = head->len;
3274
3275 if (skb->len + head->len > max_amsdu_len)
3276 goto out;
3277
3278 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3279 nfrags += 1 + skb_shinfo(head)->nr_frags;
3280 frag_tail = &skb_shinfo(head)->frag_list;
3281 while (*frag_tail) {
3282 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3283 frag_tail = &(*frag_tail)->next;
3284 n++;
3285 }
3286
3287 if (max_subframes && n > max_subframes)
3288 goto out;
3289
3290 if (max_frags && nfrags > max_frags)
3291 goto out;
3292
3293 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3294 goto out;
3295
3296 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3297 goto out;
3298
3299
3300
3301
3302
3303
3304
3305
3306 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3307 if ((head->len - hdrlen) & 3)
3308 pad = 4 - ((head->len - hdrlen) & 3);
3309
3310 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
3311 2 + pad))
3312 goto out_recalc;
3313
3314 ret = true;
3315 data = skb_push(skb, ETH_ALEN + 2);
3316 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3317
3318 data += 2 * ETH_ALEN;
3319 len = cpu_to_be16(subframe_len);
3320 memcpy(data, &len, 2);
3321 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3322
3323 memset(skb_push(skb, pad), 0, pad);
3324
3325 head->len += skb->len;
3326 head->data_len += skb->len;
3327 *frag_tail = skb;
3328
3329out_recalc:
3330 fq->memory_usage += head->truesize - orig_truesize;
3331 if (head->len != orig_len) {
3332 flow->backlog += head->len - orig_len;
3333 tin->backlog_bytes += head->len - orig_len;
3334
3335 fq_recalc_backlog(fq, tin, flow);
3336 }
3337out:
3338 spin_unlock_bh(&fq->lock);
3339
3340 return ret;
3341}
3342
3343
3344
3345
3346
3347static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3348 struct sta_info *sta, u8 pn_offs,
3349 struct ieee80211_key *key,
3350 struct sk_buff *skb)
3351{
3352 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3353 struct ieee80211_hdr *hdr = (void *)skb->data;
3354 u8 tid = IEEE80211_NUM_TIDS;
3355
3356 if (key)
3357 info->control.hw_key = &key->conf;
3358
3359 ieee80211_tx_stats(skb->dev, skb->len);
3360
3361 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3362 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3363 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3364 } else {
3365 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3366 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3367 sdata->sequence_number += 0x10;
3368 }
3369
3370 if (skb_shinfo(skb)->gso_size)
3371 sta->tx_stats.msdu[tid] +=
3372 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3373 else
3374 sta->tx_stats.msdu[tid]++;
3375
3376 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3377
3378
3379
3380
3381 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3382 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3383
3384 if (pn_offs) {
3385 u64 pn;
3386 u8 *crypto_hdr = skb->data + pn_offs;
3387
3388 switch (key->conf.cipher) {
3389 case WLAN_CIPHER_SUITE_CCMP:
3390 case WLAN_CIPHER_SUITE_CCMP_256:
3391 case WLAN_CIPHER_SUITE_GCMP:
3392 case WLAN_CIPHER_SUITE_GCMP_256:
3393 pn = atomic64_inc_return(&key->conf.tx_pn);
3394 crypto_hdr[0] = pn;
3395 crypto_hdr[1] = pn >> 8;
3396 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3397 crypto_hdr[4] = pn >> 16;
3398 crypto_hdr[5] = pn >> 24;
3399 crypto_hdr[6] = pn >> 32;
3400 crypto_hdr[7] = pn >> 40;
3401 break;
3402 }
3403 }
3404}
3405
3406static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3407 struct sta_info *sta,
3408 struct ieee80211_fast_tx *fast_tx,
3409 struct sk_buff *skb)
3410{
3411 struct ieee80211_local *local = sdata->local;
3412 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3413 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3414 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3415 struct ethhdr eth;
3416 struct ieee80211_tx_info *info;
3417 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3418 struct ieee80211_tx_data tx;
3419 ieee80211_tx_result r;
3420 struct tid_ampdu_tx *tid_tx = NULL;
3421 u8 tid = IEEE80211_NUM_TIDS;
3422
3423
3424 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3425 return false;
3426
3427
3428 if (ethertype < ETH_P_802_3_MIN)
3429 return false;
3430
3431
3432 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3433 return false;
3434
3435 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3436 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3437 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3438 if (tid_tx) {
3439 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3440 return false;
3441 if (tid_tx->timeout)
3442 tid_tx->last_tx = jiffies;
3443 }
3444 }
3445
3446
3447
3448 if (skb_shared(skb)) {
3449 struct sk_buff *tmp_skb = skb;
3450
3451 skb = skb_clone(skb, GFP_ATOMIC);
3452 kfree_skb(tmp_skb);
3453
3454 if (!skb)
3455 return true;
3456 }
3457
3458 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3459 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3460 return true;
3461
3462
3463
3464
3465
3466 if (unlikely(ieee80211_skb_resize(sdata, skb,
3467 max_t(int, extra_head + hw_headroom -
3468 skb_headroom(skb), 0),
3469 false))) {
3470 kfree_skb(skb);
3471 return true;
3472 }
3473
3474 memcpy(ð, skb->data, ETH_HLEN - 2);
3475 hdr = skb_push(skb, extra_head);
3476 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3477 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3478 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3479
3480 info = IEEE80211_SKB_CB(skb);
3481 memset(info, 0, sizeof(*info));
3482 info->band = fast_tx->band;
3483 info->control.vif = &sdata->vif;
3484 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3485 IEEE80211_TX_CTL_DONTFRAG |
3486 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3487 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
3488
3489#ifdef CONFIG_MAC80211_DEBUGFS
3490 if (local->force_tx_status)
3491 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3492#endif
3493
3494 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3495 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3496 *ieee80211_get_qos_ctl(hdr) = tid;
3497 }
3498
3499 __skb_queue_head_init(&tx.skbs);
3500
3501 tx.flags = IEEE80211_TX_UNICAST;
3502 tx.local = local;
3503 tx.sdata = sdata;
3504 tx.sta = sta;
3505 tx.key = fast_tx->key;
3506
3507 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3508 tx.skb = skb;
3509 r = ieee80211_tx_h_rate_ctrl(&tx);
3510 skb = tx.skb;
3511 tx.skb = NULL;
3512
3513 if (r != TX_CONTINUE) {
3514 if (r != TX_QUEUED)
3515 kfree_skb(skb);
3516 return true;
3517 }
3518 }
3519
3520 if (ieee80211_queue_skb(local, sdata, sta, skb))
3521 return true;
3522
3523 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3524 fast_tx->key, skb);
3525
3526 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3527 sdata = container_of(sdata->bss,
3528 struct ieee80211_sub_if_data, u.ap);
3529
3530 __skb_queue_tail(&tx.skbs, skb);
3531 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3532 return true;
3533}
3534
3535struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3536 struct ieee80211_txq *txq)
3537{
3538 struct ieee80211_local *local = hw_to_local(hw);
3539 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3540 struct ieee80211_hdr *hdr;
3541 struct sk_buff *skb = NULL;
3542 struct fq *fq = &local->fq;
3543 struct fq_tin *tin = &txqi->tin;
3544 struct ieee80211_tx_info *info;
3545 struct ieee80211_tx_data tx;
3546 ieee80211_tx_result r;
3547 struct ieee80211_vif *vif = txq->vif;
3548
3549begin:
3550 spin_lock_bh(&fq->lock);
3551
3552 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) ||
3553 test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags))
3554 goto out;
3555
3556 if (vif->txqs_stopped[ieee80211_ac_from_tid(txq->tid)]) {
3557 set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags);
3558 goto out;
3559 }
3560
3561
3562 skb = __skb_dequeue(&txqi->frags);
3563 if (skb)
3564 goto out;
3565
3566 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3567 if (!skb)
3568 goto out;
3569
3570 spin_unlock_bh(&fq->lock);
3571
3572 hdr = (struct ieee80211_hdr *)skb->data;
3573 info = IEEE80211_SKB_CB(skb);
3574
3575 memset(&tx, 0, sizeof(tx));
3576 __skb_queue_head_init(&tx.skbs);
3577 tx.local = local;
3578 tx.skb = skb;
3579 tx.sdata = vif_to_sdata(info->control.vif);
3580
3581 if (txq->sta)
3582 tx.sta = container_of(txq->sta, struct sta_info, sta);
3583
3584
3585
3586
3587
3588 r = ieee80211_tx_h_select_key(&tx);
3589 if (r != TX_CONTINUE) {
3590 ieee80211_free_txskb(&local->hw, skb);
3591 goto begin;
3592 }
3593
3594 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3595 info->flags |= IEEE80211_TX_CTL_AMPDU;
3596 else
3597 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3598
3599 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3600 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3601 sta);
3602 u8 pn_offs = 0;
3603
3604 if (tx.key &&
3605 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3606 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3607
3608 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3609 tx.key, skb);
3610 } else {
3611 if (invoke_tx_handlers_late(&tx))
3612 goto begin;
3613
3614 skb = __skb_dequeue(&tx.skbs);
3615
3616 if (!skb_queue_empty(&tx.skbs)) {
3617 spin_lock_bh(&fq->lock);
3618 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
3619 spin_unlock_bh(&fq->lock);
3620 }
3621 }
3622
3623 if (skb_has_frag_list(skb) &&
3624 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3625 if (skb_linearize(skb)) {
3626 ieee80211_free_txskb(&local->hw, skb);
3627 goto begin;
3628 }
3629 }
3630
3631 switch (tx.sdata->vif.type) {
3632 case NL80211_IFTYPE_MONITOR:
3633 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3634 vif = &tx.sdata->vif;
3635 break;
3636 }
3637 tx.sdata = rcu_dereference(local->monitor_sdata);
3638 if (tx.sdata) {
3639 vif = &tx.sdata->vif;
3640 info->hw_queue =
3641 vif->hw_queue[skb_get_queue_mapping(skb)];
3642 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3643 ieee80211_free_txskb(&local->hw, skb);
3644 goto begin;
3645 } else {
3646 vif = NULL;
3647 }
3648 break;
3649 case NL80211_IFTYPE_AP_VLAN:
3650 tx.sdata = container_of(tx.sdata->bss,
3651 struct ieee80211_sub_if_data, u.ap);
3652
3653 default:
3654 vif = &tx.sdata->vif;
3655 break;
3656 }
3657
3658 IEEE80211_SKB_CB(skb)->control.vif = vif;
3659 return skb;
3660
3661out:
3662 spin_unlock_bh(&fq->lock);
3663
3664 return skb;
3665}
3666EXPORT_SYMBOL(ieee80211_tx_dequeue);
3667
3668struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
3669{
3670 struct ieee80211_local *local = hw_to_local(hw);
3671 struct ieee80211_txq *ret = NULL;
3672 struct txq_info *txqi = NULL;
3673
3674 spin_lock_bh(&local->active_txq_lock[ac]);
3675
3676 begin:
3677 txqi = list_first_entry_or_null(&local->active_txqs[ac],
3678 struct txq_info,
3679 schedule_order);
3680 if (!txqi)
3681 goto out;
3682
3683 if (txqi->txq.sta) {
3684 struct sta_info *sta = container_of(txqi->txq.sta,
3685 struct sta_info, sta);
3686
3687 if (sta->airtime[txqi->txq.ac].deficit < 0) {
3688 sta->airtime[txqi->txq.ac].deficit +=
3689 sta->airtime_weight;
3690 list_move_tail(&txqi->schedule_order,
3691 &local->active_txqs[txqi->txq.ac]);
3692 goto begin;
3693 }
3694 }
3695
3696
3697 if (txqi->schedule_round == local->schedule_round[ac])
3698 goto out;
3699
3700 list_del_init(&txqi->schedule_order);
3701 txqi->schedule_round = local->schedule_round[ac];
3702 ret = &txqi->txq;
3703
3704out:
3705 spin_unlock_bh(&local->active_txq_lock[ac]);
3706 return ret;
3707}
3708EXPORT_SYMBOL(ieee80211_next_txq);
3709
3710void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
3711 struct ieee80211_txq *txq,
3712 bool force)
3713{
3714 struct ieee80211_local *local = hw_to_local(hw);
3715 struct txq_info *txqi = to_txq_info(txq);
3716
3717 spin_lock_bh(&local->active_txq_lock[txq->ac]);
3718
3719 if (list_empty(&txqi->schedule_order) &&
3720 (force || !skb_queue_empty(&txqi->frags) ||
3721 txqi->tin.backlog_packets)) {
3722
3723
3724
3725
3726
3727
3728
3729 if (txqi->txq.sta &&
3730 wiphy_ext_feature_isset(local->hw.wiphy,
3731 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
3732 list_add(&txqi->schedule_order,
3733 &local->active_txqs[txq->ac]);
3734 else
3735 list_add_tail(&txqi->schedule_order,
3736 &local->active_txqs[txq->ac]);
3737 }
3738
3739 spin_unlock_bh(&local->active_txq_lock[txq->ac]);
3740}
3741EXPORT_SYMBOL(__ieee80211_schedule_txq);
3742
3743bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
3744 struct ieee80211_txq *txq)
3745{
3746 struct ieee80211_local *local = hw_to_local(hw);
3747 struct txq_info *iter, *tmp, *txqi = to_txq_info(txq);
3748 struct sta_info *sta;
3749 u8 ac = txq->ac;
3750
3751 spin_lock_bh(&local->active_txq_lock[ac]);
3752
3753 if (!txqi->txq.sta)
3754 goto out;
3755
3756 if (list_empty(&txqi->schedule_order))
3757 goto out;
3758
3759 list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac],
3760 schedule_order) {
3761 if (iter == txqi)
3762 break;
3763
3764 if (!iter->txq.sta) {
3765 list_move_tail(&iter->schedule_order,
3766 &local->active_txqs[ac]);
3767 continue;
3768 }
3769 sta = container_of(iter->txq.sta, struct sta_info, sta);
3770 if (sta->airtime[ac].deficit < 0)
3771 sta->airtime[ac].deficit += sta->airtime_weight;
3772 list_move_tail(&iter->schedule_order, &local->active_txqs[ac]);
3773 }
3774
3775 sta = container_of(txqi->txq.sta, struct sta_info, sta);
3776 if (sta->airtime[ac].deficit >= 0)
3777 goto out;
3778
3779 sta->airtime[ac].deficit += sta->airtime_weight;
3780 list_move_tail(&txqi->schedule_order, &local->active_txqs[ac]);
3781 spin_unlock_bh(&local->active_txq_lock[ac]);
3782
3783 return false;
3784out:
3785 if (!list_empty(&txqi->schedule_order))
3786 list_del_init(&txqi->schedule_order);
3787 spin_unlock_bh(&local->active_txq_lock[ac]);
3788
3789 return true;
3790}
3791EXPORT_SYMBOL(ieee80211_txq_may_transmit);
3792
3793void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
3794{
3795 struct ieee80211_local *local = hw_to_local(hw);
3796
3797 spin_lock_bh(&local->active_txq_lock[ac]);
3798 local->schedule_round[ac]++;
3799 spin_unlock_bh(&local->active_txq_lock[ac]);
3800}
3801EXPORT_SYMBOL(ieee80211_txq_schedule_start);
3802
3803void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3804 struct net_device *dev,
3805 u32 info_flags,
3806 u32 ctrl_flags)
3807{
3808 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3809 struct ieee80211_local *local = sdata->local;
3810 struct sta_info *sta;
3811 struct sk_buff *next;
3812
3813 if (unlikely(skb->len < ETH_HLEN)) {
3814 kfree_skb(skb);
3815 return;
3816 }
3817
3818 rcu_read_lock();
3819
3820 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3821 goto out_free;
3822
3823 if (IS_ERR(sta))
3824 sta = NULL;
3825
3826 if (local->ops->wake_tx_queue) {
3827 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
3828 skb_set_queue_mapping(skb, queue);
3829 }
3830
3831 if (sta) {
3832 struct ieee80211_fast_tx *fast_tx;
3833
3834 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
3835
3836 fast_tx = rcu_dereference(sta->fast_tx);
3837
3838 if (fast_tx &&
3839 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
3840 goto out;
3841 }
3842
3843 if (skb_is_gso(skb)) {
3844 struct sk_buff *segs;
3845
3846 segs = skb_gso_segment(skb, 0);
3847 if (IS_ERR(segs)) {
3848 goto out_free;
3849 } else if (segs) {
3850 consume_skb(skb);
3851 skb = segs;
3852 }
3853 } else {
3854
3855 if (skb_linearize(skb)) {
3856 kfree_skb(skb);
3857 goto out;
3858 }
3859
3860
3861
3862
3863
3864 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3865 skb_set_transport_header(skb,
3866 skb_checksum_start_offset(skb));
3867 if (skb_checksum_help(skb))
3868 goto out_free;
3869 }
3870 }
3871
3872 next = skb;
3873 while (next) {
3874 skb = next;
3875 next = skb->next;
3876
3877 skb->prev = NULL;
3878 skb->next = NULL;
3879
3880 skb = ieee80211_build_hdr(sdata, skb, info_flags,
3881 sta, ctrl_flags);
3882 if (IS_ERR(skb))
3883 goto out;
3884
3885 ieee80211_tx_stats(dev, skb->len);
3886
3887 ieee80211_xmit(sdata, sta, skb, 0);
3888 }
3889 goto out;
3890 out_free:
3891 kfree_skb(skb);
3892 out:
3893 rcu_read_unlock();
3894}
3895
3896static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
3897{
3898 struct ethhdr *eth;
3899 int err;
3900
3901 err = skb_ensure_writable(skb, ETH_HLEN);
3902 if (unlikely(err))
3903 return err;
3904
3905 eth = (void *)skb->data;
3906 ether_addr_copy(eth->h_dest, sta->sta.addr);
3907
3908 return 0;
3909}
3910
3911static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
3912 struct net_device *dev)
3913{
3914 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3915 const struct ethhdr *eth = (void *)skb->data;
3916 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
3917 __be16 ethertype;
3918
3919 if (likely(!is_multicast_ether_addr(eth->h_dest)))
3920 return false;
3921
3922 switch (sdata->vif.type) {
3923 case NL80211_IFTYPE_AP_VLAN:
3924 if (sdata->u.vlan.sta)
3925 return false;
3926 if (sdata->wdev.use_4addr)
3927 return false;
3928
3929 case NL80211_IFTYPE_AP:
3930
3931 if (!sdata->bss->multicast_to_unicast)
3932 return false;
3933 break;
3934 default:
3935 return false;
3936 }
3937
3938
3939 ethertype = eth->h_proto;
3940 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
3941 ethertype = ethvlan->h_vlan_encapsulated_proto;
3942 switch (ethertype) {
3943 case htons(ETH_P_ARP):
3944 case htons(ETH_P_IP):
3945 case htons(ETH_P_IPV6):
3946 break;
3947 default:
3948 return false;
3949 }
3950
3951 return true;
3952}
3953
3954static void
3955ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
3956 struct sk_buff_head *queue)
3957{
3958 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3959 struct ieee80211_local *local = sdata->local;
3960 const struct ethhdr *eth = (struct ethhdr *)skb->data;
3961 struct sta_info *sta, *first = NULL;
3962 struct sk_buff *cloned_skb;
3963
3964 rcu_read_lock();
3965
3966 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3967 if (sdata != sta->sdata)
3968
3969 continue;
3970 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
3971
3972 continue;
3973 if (!first) {
3974 first = sta;
3975 continue;
3976 }
3977 cloned_skb = skb_clone(skb, GFP_ATOMIC);
3978 if (!cloned_skb)
3979 goto multicast;
3980 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
3981 dev_kfree_skb(cloned_skb);
3982 goto multicast;
3983 }
3984 __skb_queue_tail(queue, cloned_skb);
3985 }
3986
3987 if (likely(first)) {
3988 if (unlikely(ieee80211_change_da(skb, first)))
3989 goto multicast;
3990 __skb_queue_tail(queue, skb);
3991 } else {
3992
3993 kfree_skb(skb);
3994 skb = NULL;
3995 }
3996
3997 goto out;
3998multicast:
3999 __skb_queue_purge(queue);
4000 __skb_queue_tail(queue, skb);
4001out:
4002 rcu_read_unlock();
4003}
4004
4005
4006
4007
4008
4009
4010
4011
4012netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4013 struct net_device *dev)
4014{
4015 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4016 struct sk_buff_head queue;
4017
4018 __skb_queue_head_init(&queue);
4019 ieee80211_convert_to_unicast(skb, dev, &queue);
4020 while ((skb = __skb_dequeue(&queue)))
4021 __ieee80211_subif_start_xmit(skb, dev, 0, 0);
4022 } else {
4023 __ieee80211_subif_start_xmit(skb, dev, 0, 0);
4024 }
4025
4026 return NETDEV_TX_OK;
4027}
4028
4029struct sk_buff *
4030ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4031 struct sk_buff *skb, u32 info_flags)
4032{
4033 struct ieee80211_hdr *hdr;
4034 struct ieee80211_tx_data tx = {
4035 .local = sdata->local,
4036 .sdata = sdata,
4037 };
4038 struct sta_info *sta;
4039
4040 rcu_read_lock();
4041
4042 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4043 kfree_skb(skb);
4044 skb = ERR_PTR(-EINVAL);
4045 goto out;
4046 }
4047
4048 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0);
4049 if (IS_ERR(skb))
4050 goto out;
4051
4052 hdr = (void *)skb->data;
4053 tx.sta = sta_info_get(sdata, hdr->addr1);
4054 tx.skb = skb;
4055
4056 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4057 rcu_read_unlock();
4058 kfree_skb(skb);
4059 return ERR_PTR(-EINVAL);
4060 }
4061
4062out:
4063 rcu_read_unlock();
4064 return skb;
4065}
4066
4067
4068
4069
4070
4071void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4072{
4073 struct sk_buff *skb;
4074 int i;
4075
4076 for (i = 0; i < local->hw.queues; i++) {
4077 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4078 ieee80211_free_txskb(&local->hw, skb);
4079 }
4080}
4081
4082
4083
4084
4085
4086
4087static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4088 struct sk_buff *skb)
4089{
4090 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4091 struct ieee80211_sub_if_data *sdata;
4092 struct sta_info *sta;
4093 struct ieee80211_hdr *hdr;
4094 bool result;
4095 struct ieee80211_chanctx_conf *chanctx_conf;
4096
4097 sdata = vif_to_sdata(info->control.vif);
4098
4099 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
4100 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4101 if (unlikely(!chanctx_conf)) {
4102 dev_kfree_skb(skb);
4103 return true;
4104 }
4105 info->band = chanctx_conf->def.chan->band;
4106 result = ieee80211_tx(sdata, NULL, skb, true, 0);
4107 } else {
4108 struct sk_buff_head skbs;
4109
4110 __skb_queue_head_init(&skbs);
4111 __skb_queue_tail(&skbs, skb);
4112
4113 hdr = (struct ieee80211_hdr *)skb->data;
4114 sta = sta_info_get(sdata, hdr->addr1);
4115
4116 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
4117 }
4118
4119 return result;
4120}
4121
4122
4123
4124
4125void ieee80211_tx_pending(unsigned long data)
4126{
4127 struct ieee80211_local *local = (struct ieee80211_local *)data;
4128 unsigned long flags;
4129 int i;
4130 bool txok;
4131
4132 rcu_read_lock();
4133
4134 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4135 for (i = 0; i < local->hw.queues; i++) {
4136
4137
4138
4139
4140 if (local->queue_stop_reasons[i] ||
4141 skb_queue_empty(&local->pending[i]))
4142 continue;
4143
4144 while (!skb_queue_empty(&local->pending[i])) {
4145 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
4146 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4147
4148 if (WARN_ON(!info->control.vif)) {
4149 ieee80211_free_txskb(&local->hw, skb);
4150 continue;
4151 }
4152
4153 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4154 flags);
4155
4156 txok = ieee80211_tx_pending_skb(local, skb);
4157 spin_lock_irqsave(&local->queue_stop_reason_lock,
4158 flags);
4159 if (!txok)
4160 break;
4161 }
4162
4163 if (skb_queue_empty(&local->pending[i]))
4164 ieee80211_propagate_queue_wake(local, i);
4165 }
4166 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4167
4168 rcu_read_unlock();
4169}
4170
4171
4172
4173static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4174 struct ps_data *ps, struct sk_buff *skb,
4175 bool is_template)
4176{
4177 u8 *pos, *tim;
4178 int aid0 = 0;
4179 int i, have_bits = 0, n1, n2;
4180
4181
4182
4183 if (atomic_read(&ps->num_sta_ps) > 0)
4184
4185
4186 have_bits = !bitmap_empty((unsigned long *)ps->tim,
4187 IEEE80211_MAX_AID+1);
4188 if (!is_template) {
4189 if (ps->dtim_count == 0)
4190 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
4191 else
4192 ps->dtim_count--;
4193 }
4194
4195 tim = pos = skb_put(skb, 6);
4196 *pos++ = WLAN_EID_TIM;
4197 *pos++ = 4;
4198 *pos++ = ps->dtim_count;
4199 *pos++ = sdata->vif.bss_conf.dtim_period;
4200
4201 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
4202 aid0 = 1;
4203
4204 ps->dtim_bc_mc = aid0 == 1;
4205
4206 if (have_bits) {
4207
4208
4209
4210 n1 = 0;
4211 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4212 if (ps->tim[i]) {
4213 n1 = i & 0xfe;
4214 break;
4215 }
4216 }
4217 n2 = n1;
4218 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4219 if (ps->tim[i]) {
4220 n2 = i;
4221 break;
4222 }
4223 }
4224
4225
4226 *pos++ = n1 | aid0;
4227
4228 skb_put(skb, n2 - n1);
4229 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
4230
4231 tim[1] = n2 - n1 + 4;
4232 } else {
4233 *pos++ = aid0;
4234 *pos++ = 0;
4235 }
4236}
4237
4238static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4239 struct ps_data *ps, struct sk_buff *skb,
4240 bool is_template)
4241{
4242 struct ieee80211_local *local = sdata->local;
4243
4244
4245
4246
4247
4248
4249
4250
4251 if (local->tim_in_locked_section) {
4252 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4253 } else {
4254 spin_lock_bh(&local->tim_lock);
4255 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4256 spin_unlock_bh(&local->tim_lock);
4257 }
4258
4259 return 0;
4260}
4261
4262static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
4263 struct beacon_data *beacon)
4264{
4265 struct probe_resp *resp;
4266 u8 *beacon_data;
4267 size_t beacon_data_len;
4268 int i;
4269 u8 count = beacon->csa_current_counter;
4270
4271 switch (sdata->vif.type) {
4272 case NL80211_IFTYPE_AP:
4273 beacon_data = beacon->tail;
4274 beacon_data_len = beacon->tail_len;
4275 break;
4276 case NL80211_IFTYPE_ADHOC:
4277 beacon_data = beacon->head;
4278 beacon_data_len = beacon->head_len;
4279 break;
4280 case NL80211_IFTYPE_MESH_POINT:
4281 beacon_data = beacon->head;
4282 beacon_data_len = beacon->head_len;
4283 break;
4284 default:
4285 return;
4286 }
4287
4288 rcu_read_lock();
4289 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
4290 resp = rcu_dereference(sdata->u.ap.probe_resp);
4291
4292 if (beacon->csa_counter_offsets[i]) {
4293 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
4294 beacon_data_len)) {
4295 rcu_read_unlock();
4296 return;
4297 }
4298
4299 beacon_data[beacon->csa_counter_offsets[i]] = count;
4300 }
4301
4302 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4303 resp->data[resp->csa_counter_offsets[i]] = count;
4304 }
4305 rcu_read_unlock();
4306}
4307
4308static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
4309{
4310 beacon->csa_current_counter--;
4311
4312
4313 WARN_ON_ONCE(!beacon->csa_current_counter);
4314
4315 return beacon->csa_current_counter;
4316}
4317
4318u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
4319{
4320 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4321 struct beacon_data *beacon = NULL;
4322 u8 count = 0;
4323
4324 rcu_read_lock();
4325
4326 if (sdata->vif.type == NL80211_IFTYPE_AP)
4327 beacon = rcu_dereference(sdata->u.ap.beacon);
4328 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4329 beacon = rcu_dereference(sdata->u.ibss.presp);
4330 else if (ieee80211_vif_is_mesh(&sdata->vif))
4331 beacon = rcu_dereference(sdata->u.mesh.beacon);
4332
4333 if (!beacon)
4334 goto unlock;
4335
4336 count = __ieee80211_csa_update_counter(beacon);
4337
4338unlock:
4339 rcu_read_unlock();
4340 return count;
4341}
4342EXPORT_SYMBOL(ieee80211_csa_update_counter);
4343
4344void ieee80211_csa_set_counter(struct ieee80211_vif *vif, u8 counter)
4345{
4346 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4347 struct beacon_data *beacon = NULL;
4348
4349 rcu_read_lock();
4350
4351 if (sdata->vif.type == NL80211_IFTYPE_AP)
4352 beacon = rcu_dereference(sdata->u.ap.beacon);
4353 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4354 beacon = rcu_dereference(sdata->u.ibss.presp);
4355 else if (ieee80211_vif_is_mesh(&sdata->vif))
4356 beacon = rcu_dereference(sdata->u.mesh.beacon);
4357
4358 if (!beacon)
4359 goto unlock;
4360
4361 if (counter < beacon->csa_current_counter)
4362 beacon->csa_current_counter = counter;
4363
4364unlock:
4365 rcu_read_unlock();
4366}
4367EXPORT_SYMBOL(ieee80211_csa_set_counter);
4368
4369bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
4370{
4371 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4372 struct beacon_data *beacon = NULL;
4373 u8 *beacon_data;
4374 size_t beacon_data_len;
4375 int ret = false;
4376
4377 if (!ieee80211_sdata_running(sdata))
4378 return false;
4379
4380 rcu_read_lock();
4381 if (vif->type == NL80211_IFTYPE_AP) {
4382 struct ieee80211_if_ap *ap = &sdata->u.ap;
4383
4384 beacon = rcu_dereference(ap->beacon);
4385 if (WARN_ON(!beacon || !beacon->tail))
4386 goto out;
4387 beacon_data = beacon->tail;
4388 beacon_data_len = beacon->tail_len;
4389 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4390 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4391
4392 beacon = rcu_dereference(ifibss->presp);
4393 if (!beacon)
4394 goto out;
4395
4396 beacon_data = beacon->head;
4397 beacon_data_len = beacon->head_len;
4398 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4399 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4400
4401 beacon = rcu_dereference(ifmsh->beacon);
4402 if (!beacon)
4403 goto out;
4404
4405 beacon_data = beacon->head;
4406 beacon_data_len = beacon->head_len;
4407 } else {
4408 WARN_ON(1);
4409 goto out;
4410 }
4411
4412 if (!beacon->csa_counter_offsets[0])
4413 goto out;
4414
4415 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
4416 goto out;
4417
4418 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
4419 ret = true;
4420 out:
4421 rcu_read_unlock();
4422
4423 return ret;
4424}
4425EXPORT_SYMBOL(ieee80211_csa_is_complete);
4426
4427static struct sk_buff *
4428__ieee80211_beacon_get(struct ieee80211_hw *hw,
4429 struct ieee80211_vif *vif,
4430 struct ieee80211_mutable_offsets *offs,
4431 bool is_template)
4432{
4433 struct ieee80211_local *local = hw_to_local(hw);
4434 struct beacon_data *beacon = NULL;
4435 struct sk_buff *skb = NULL;
4436 struct ieee80211_tx_info *info;
4437 struct ieee80211_sub_if_data *sdata = NULL;
4438 enum nl80211_band band;
4439 struct ieee80211_tx_rate_control txrc;
4440 struct ieee80211_chanctx_conf *chanctx_conf;
4441 int csa_off_base = 0;
4442
4443 rcu_read_lock();
4444
4445 sdata = vif_to_sdata(vif);
4446 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4447
4448 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
4449 goto out;
4450
4451 if (offs)
4452 memset(offs, 0, sizeof(*offs));
4453
4454 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4455 struct ieee80211_if_ap *ap = &sdata->u.ap;
4456
4457 beacon = rcu_dereference(ap->beacon);
4458 if (beacon) {
4459 if (beacon->csa_counter_offsets[0]) {
4460 if (!is_template)
4461 __ieee80211_csa_update_counter(beacon);
4462
4463 ieee80211_set_csa(sdata, beacon);
4464 }
4465
4466
4467
4468
4469
4470 skb = dev_alloc_skb(local->tx_headroom +
4471 beacon->head_len +
4472 beacon->tail_len + 256 +
4473 local->hw.extra_beacon_tailroom);
4474 if (!skb)
4475 goto out;
4476
4477 skb_reserve(skb, local->tx_headroom);
4478 skb_put_data(skb, beacon->head, beacon->head_len);
4479
4480 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4481 is_template);
4482
4483 if (offs) {
4484 offs->tim_offset = beacon->head_len;
4485 offs->tim_length = skb->len - beacon->head_len;
4486
4487
4488 csa_off_base = skb->len;
4489 }
4490
4491 if (beacon->tail)
4492 skb_put_data(skb, beacon->tail,
4493 beacon->tail_len);
4494 } else
4495 goto out;
4496 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
4497 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4498 struct ieee80211_hdr *hdr;
4499
4500 beacon = rcu_dereference(ifibss->presp);
4501 if (!beacon)
4502 goto out;
4503
4504 if (beacon->csa_counter_offsets[0]) {
4505 if (!is_template)
4506 __ieee80211_csa_update_counter(beacon);
4507
4508 ieee80211_set_csa(sdata, beacon);
4509 }
4510
4511 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
4512 local->hw.extra_beacon_tailroom);
4513 if (!skb)
4514 goto out;
4515 skb_reserve(skb, local->tx_headroom);
4516 skb_put_data(skb, beacon->head, beacon->head_len);
4517
4518 hdr = (struct ieee80211_hdr *) skb->data;
4519 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4520 IEEE80211_STYPE_BEACON);
4521 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4522 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4523
4524 beacon = rcu_dereference(ifmsh->beacon);
4525 if (!beacon)
4526 goto out;
4527
4528 if (beacon->csa_counter_offsets[0]) {
4529 if (!is_template)
4530
4531
4532
4533
4534
4535 __ieee80211_csa_update_counter(beacon);
4536
4537 ieee80211_set_csa(sdata, beacon);
4538 }
4539
4540 if (ifmsh->sync_ops)
4541 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
4542
4543 skb = dev_alloc_skb(local->tx_headroom +
4544 beacon->head_len +
4545 256 +
4546 beacon->tail_len +
4547 local->hw.extra_beacon_tailroom);
4548 if (!skb)
4549 goto out;
4550 skb_reserve(skb, local->tx_headroom);
4551 skb_put_data(skb, beacon->head, beacon->head_len);
4552 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4553
4554 if (offs) {
4555 offs->tim_offset = beacon->head_len;
4556 offs->tim_length = skb->len - beacon->head_len;
4557 }
4558
4559 skb_put_data(skb, beacon->tail, beacon->tail_len);
4560 } else {
4561 WARN_ON(1);
4562 goto out;
4563 }
4564
4565
4566 if (offs && beacon) {
4567 int i;
4568
4569 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
4570 u16 csa_off = beacon->csa_counter_offsets[i];
4571
4572 if (!csa_off)
4573 continue;
4574
4575 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4576 }
4577 }
4578
4579 band = chanctx_conf->def.chan->band;
4580
4581 info = IEEE80211_SKB_CB(skb);
4582
4583 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
4584 info->flags |= IEEE80211_TX_CTL_NO_ACK;
4585 info->band = band;
4586
4587 memset(&txrc, 0, sizeof(txrc));
4588 txrc.hw = hw;
4589 txrc.sband = local->hw.wiphy->bands[band];
4590 txrc.bss_conf = &sdata->vif.bss_conf;
4591 txrc.skb = skb;
4592 txrc.reported_rate.idx = -1;
4593 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
4594 txrc.bss = true;
4595 rate_control_get_rate(sdata, NULL, &txrc);
4596
4597 info->control.vif = vif;
4598
4599 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4600 IEEE80211_TX_CTL_ASSIGN_SEQ |
4601 IEEE80211_TX_CTL_FIRST_FRAGMENT;
4602 out:
4603 rcu_read_unlock();
4604 return skb;
4605
4606}
4607
4608struct sk_buff *
4609ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4610 struct ieee80211_vif *vif,
4611 struct ieee80211_mutable_offsets *offs)
4612{
4613 return __ieee80211_beacon_get(hw, vif, offs, true);
4614}
4615EXPORT_SYMBOL(ieee80211_beacon_get_template);
4616
4617struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4618 struct ieee80211_vif *vif,
4619 u16 *tim_offset, u16 *tim_length)
4620{
4621 struct ieee80211_mutable_offsets offs = {};
4622 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
4623 struct sk_buff *copy;
4624 struct ieee80211_supported_band *sband;
4625 int shift;
4626
4627 if (!bcn)
4628 return bcn;
4629
4630 if (tim_offset)
4631 *tim_offset = offs.tim_offset;
4632
4633 if (tim_length)
4634 *tim_length = offs.tim_length;
4635
4636 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4637 !hw_to_local(hw)->monitors)
4638 return bcn;
4639
4640
4641 copy = skb_copy(bcn, GFP_ATOMIC);
4642 if (!copy)
4643 return bcn;
4644
4645 shift = ieee80211_vif_get_shift(vif);
4646 sband = ieee80211_get_sband(vif_to_sdata(vif));
4647 if (!sband)
4648 return bcn;
4649
4650 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4651
4652 return bcn;
4653}
4654EXPORT_SYMBOL(ieee80211_beacon_get_tim);
4655
4656struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4657 struct ieee80211_vif *vif)
4658{
4659 struct ieee80211_if_ap *ap = NULL;
4660 struct sk_buff *skb = NULL;
4661 struct probe_resp *presp = NULL;
4662 struct ieee80211_hdr *hdr;
4663 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4664
4665 if (sdata->vif.type != NL80211_IFTYPE_AP)
4666 return NULL;
4667
4668 rcu_read_lock();
4669
4670 ap = &sdata->u.ap;
4671 presp = rcu_dereference(ap->probe_resp);
4672 if (!presp)
4673 goto out;
4674
4675 skb = dev_alloc_skb(presp->len);
4676 if (!skb)
4677 goto out;
4678
4679 skb_put_data(skb, presp->data, presp->len);
4680
4681 hdr = (struct ieee80211_hdr *) skb->data;
4682 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4683
4684out:
4685 rcu_read_unlock();
4686 return skb;
4687}
4688EXPORT_SYMBOL(ieee80211_proberesp_get);
4689
4690struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4691 struct ieee80211_vif *vif)
4692{
4693 struct ieee80211_sub_if_data *sdata;
4694 struct ieee80211_if_managed *ifmgd;
4695 struct ieee80211_pspoll *pspoll;
4696 struct ieee80211_local *local;
4697 struct sk_buff *skb;
4698
4699 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4700 return NULL;
4701
4702 sdata = vif_to_sdata(vif);
4703 ifmgd = &sdata->u.mgd;
4704 local = sdata->local;
4705
4706 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
4707 if (!skb)
4708 return NULL;
4709
4710 skb_reserve(skb, local->hw.extra_tx_headroom);
4711
4712 pspoll = skb_put_zero(skb, sizeof(*pspoll));
4713 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4714 IEEE80211_STYPE_PSPOLL);
4715 pspoll->aid = cpu_to_le16(ifmgd->aid);
4716
4717
4718 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4719
4720 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4721 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4722
4723 return skb;
4724}
4725EXPORT_SYMBOL(ieee80211_pspoll_get);
4726
4727struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4728 struct ieee80211_vif *vif,
4729 bool qos_ok)
4730{
4731 struct ieee80211_hdr_3addr *nullfunc;
4732 struct ieee80211_sub_if_data *sdata;
4733 struct ieee80211_if_managed *ifmgd;
4734 struct ieee80211_local *local;
4735 struct sk_buff *skb;
4736 bool qos = false;
4737
4738 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4739 return NULL;
4740
4741 sdata = vif_to_sdata(vif);
4742 ifmgd = &sdata->u.mgd;
4743 local = sdata->local;
4744
4745 if (qos_ok) {
4746 struct sta_info *sta;
4747
4748 rcu_read_lock();
4749 sta = sta_info_get(sdata, ifmgd->bssid);
4750 qos = sta && sta->sta.wme;
4751 rcu_read_unlock();
4752 }
4753
4754 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
4755 sizeof(*nullfunc) + 2);
4756 if (!skb)
4757 return NULL;
4758
4759 skb_reserve(skb, local->hw.extra_tx_headroom);
4760
4761 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
4762 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4763 IEEE80211_STYPE_NULLFUNC |
4764 IEEE80211_FCTL_TODS);
4765 if (qos) {
4766 __le16 qoshdr = cpu_to_le16(7);
4767
4768 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
4769 IEEE80211_STYPE_NULLFUNC) !=
4770 IEEE80211_STYPE_QOS_NULLFUNC);
4771 nullfunc->frame_control |=
4772 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
4773 skb->priority = 7;
4774 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
4775 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
4776 }
4777
4778 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4779 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4780 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4781
4782 return skb;
4783}
4784EXPORT_SYMBOL(ieee80211_nullfunc_get);
4785
4786struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
4787 const u8 *src_addr,
4788 const u8 *ssid, size_t ssid_len,
4789 size_t tailroom)
4790{
4791 struct ieee80211_local *local = hw_to_local(hw);
4792 struct ieee80211_hdr_3addr *hdr;
4793 struct sk_buff *skb;
4794 size_t ie_ssid_len;
4795 u8 *pos;
4796
4797 ie_ssid_len = 2 + ssid_len;
4798
4799 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
4800 ie_ssid_len + tailroom);
4801 if (!skb)
4802 return NULL;
4803
4804 skb_reserve(skb, local->hw.extra_tx_headroom);
4805
4806 hdr = skb_put_zero(skb, sizeof(*hdr));
4807 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4808 IEEE80211_STYPE_PROBE_REQ);
4809 eth_broadcast_addr(hdr->addr1);
4810 memcpy(hdr->addr2, src_addr, ETH_ALEN);
4811 eth_broadcast_addr(hdr->addr3);
4812
4813 pos = skb_put(skb, ie_ssid_len);
4814 *pos++ = WLAN_EID_SSID;
4815 *pos++ = ssid_len;
4816 if (ssid_len)
4817 memcpy(pos, ssid, ssid_len);
4818 pos += ssid_len;
4819
4820 return skb;
4821}
4822EXPORT_SYMBOL(ieee80211_probereq_get);
4823
4824void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4825 const void *frame, size_t frame_len,
4826 const struct ieee80211_tx_info *frame_txctl,
4827 struct ieee80211_rts *rts)
4828{
4829 const struct ieee80211_hdr *hdr = frame;
4830
4831 rts->frame_control =
4832 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
4833 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4834 frame_txctl);
4835 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4836 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4837}
4838EXPORT_SYMBOL(ieee80211_rts_get);
4839
4840void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4841 const void *frame, size_t frame_len,
4842 const struct ieee80211_tx_info *frame_txctl,
4843 struct ieee80211_cts *cts)
4844{
4845 const struct ieee80211_hdr *hdr = frame;
4846
4847 cts->frame_control =
4848 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
4849 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4850 frame_len, frame_txctl);
4851 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4852}
4853EXPORT_SYMBOL(ieee80211_ctstoself_get);
4854
4855struct sk_buff *
4856ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
4857 struct ieee80211_vif *vif)
4858{
4859 struct ieee80211_local *local = hw_to_local(hw);
4860 struct sk_buff *skb = NULL;
4861 struct ieee80211_tx_data tx;
4862 struct ieee80211_sub_if_data *sdata;
4863 struct ps_data *ps;
4864 struct ieee80211_tx_info *info;
4865 struct ieee80211_chanctx_conf *chanctx_conf;
4866
4867 sdata = vif_to_sdata(vif);
4868
4869 rcu_read_lock();
4870 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4871
4872 if (!chanctx_conf)
4873 goto out;
4874
4875 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4876 struct beacon_data *beacon =
4877 rcu_dereference(sdata->u.ap.beacon);
4878
4879 if (!beacon || !beacon->head)
4880 goto out;
4881
4882 ps = &sdata->u.ap.ps;
4883 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4884 ps = &sdata->u.mesh.ps;
4885 } else {
4886 goto out;
4887 }
4888
4889 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
4890 goto out;
4891
4892 while (1) {
4893 skb = skb_dequeue(&ps->bc_buf);
4894 if (!skb)
4895 goto out;
4896 local->total_ps_buffered--;
4897
4898 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
4899 struct ieee80211_hdr *hdr =
4900 (struct ieee80211_hdr *) skb->data;
4901
4902
4903
4904 hdr->frame_control |=
4905 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4906 }
4907
4908 if (sdata->vif.type == NL80211_IFTYPE_AP)
4909 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
4910 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
4911 break;
4912 ieee80211_free_txskb(hw, skb);
4913 }
4914
4915 info = IEEE80211_SKB_CB(skb);
4916
4917 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4918 info->band = chanctx_conf->def.chan->band;
4919
4920 if (invoke_tx_handlers(&tx))
4921 skb = NULL;
4922 out:
4923 rcu_read_unlock();
4924
4925 return skb;
4926}
4927EXPORT_SYMBOL(ieee80211_get_buffered_bc);
4928
4929int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4930{
4931 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4932 struct ieee80211_sub_if_data *sdata = sta->sdata;
4933 struct ieee80211_local *local = sdata->local;
4934 int ret;
4935 u32 queues;
4936
4937 lockdep_assert_held(&local->sta_mtx);
4938
4939
4940 switch (sdata->vif.type) {
4941 case NL80211_IFTYPE_STATION:
4942 case NL80211_IFTYPE_AP:
4943 case NL80211_IFTYPE_AP_VLAN:
4944 break;
4945 default:
4946 WARN_ON(1);
4947 return -EINVAL;
4948 }
4949
4950 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4951 return -EINVAL;
4952
4953 if (sta->reserved_tid == tid) {
4954 ret = 0;
4955 goto out;
4956 }
4957
4958 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4959 sdata_err(sdata, "TID reservation already active\n");
4960 ret = -EALREADY;
4961 goto out;
4962 }
4963
4964 ieee80211_stop_vif_queues(sdata->local, sdata,
4965 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4966
4967 synchronize_net();
4968
4969
4970 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
4971 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4972 __ieee80211_stop_tx_ba_session(sta, tid,
4973 AGG_STOP_LOCAL_REQUEST);
4974 }
4975
4976 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
4977 __ieee80211_flush_queues(local, sdata, queues, false);
4978
4979 sta->reserved_tid = tid;
4980
4981 ieee80211_wake_vif_queues(local, sdata,
4982 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4983
4984 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
4985 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4986
4987 ret = 0;
4988 out:
4989 return ret;
4990}
4991EXPORT_SYMBOL(ieee80211_reserve_tid);
4992
4993void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4994{
4995 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4996 struct ieee80211_sub_if_data *sdata = sta->sdata;
4997
4998 lockdep_assert_held(&sdata->local->sta_mtx);
4999
5000
5001 switch (sdata->vif.type) {
5002 case NL80211_IFTYPE_STATION:
5003 case NL80211_IFTYPE_AP:
5004 case NL80211_IFTYPE_AP_VLAN:
5005 break;
5006 default:
5007 WARN_ON(1);
5008 return;
5009 }
5010
5011 if (tid != sta->reserved_tid) {
5012 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
5013 return;
5014 }
5015
5016 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
5017}
5018EXPORT_SYMBOL(ieee80211_unreserve_tid);
5019
5020void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
5021 struct sk_buff *skb, int tid,
5022 enum nl80211_band band, u32 txdata_flags)
5023{
5024 int ac = ieee80211_ac_from_tid(tid);
5025
5026 skb_reset_mac_header(skb);
5027 skb_set_queue_mapping(skb, ac);
5028 skb->priority = tid;
5029
5030 skb->dev = sdata->dev;
5031
5032
5033
5034
5035
5036
5037 local_bh_disable();
5038 IEEE80211_SKB_CB(skb)->band = band;
5039 ieee80211_xmit(sdata, NULL, skb, txdata_flags);
5040 local_bh_enable();
5041}
5042
5043int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
5044 const u8 *buf, size_t len,
5045 const u8 *dest, __be16 proto, bool unencrypted)
5046{
5047 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5048 struct ieee80211_local *local = sdata->local;
5049 struct sk_buff *skb;
5050 struct ethhdr *ehdr;
5051 u32 flags;
5052
5053
5054
5055
5056 if (proto != sdata->control_port_protocol &&
5057 proto != cpu_to_be16(ETH_P_PREAUTH))
5058 return -EINVAL;
5059
5060 if (unencrypted)
5061 flags = IEEE80211_TX_INTFL_DONT_ENCRYPT;
5062 else
5063 flags = 0;
5064
5065 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5066 sizeof(struct ethhdr) + len);
5067 if (!skb)
5068 return -ENOMEM;
5069
5070 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
5071
5072 skb_put_data(skb, buf, len);
5073
5074 ehdr = skb_push(skb, sizeof(struct ethhdr));
5075 memcpy(ehdr->h_dest, dest, ETH_ALEN);
5076 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
5077 ehdr->h_proto = proto;
5078
5079 skb->dev = dev;
5080 skb->protocol = htons(ETH_P_802_3);
5081 skb_reset_network_header(skb);
5082 skb_reset_mac_header(skb);
5083
5084 local_bh_disable();
5085 __ieee80211_subif_start_xmit(skb, skb->dev, flags, 0);
5086 local_bh_enable();
5087
5088 return 0;
5089}
5090
5091int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
5092 const u8 *buf, size_t len)
5093{
5094 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5095 struct ieee80211_local *local = sdata->local;
5096 struct sk_buff *skb;
5097
5098 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
5099 30 +
5100 18);
5101 if (!skb)
5102 return -ENOMEM;
5103
5104 skb_reserve(skb, local->hw.extra_tx_headroom);
5105 skb_put_data(skb, buf, len);
5106
5107 skb->dev = dev;
5108 skb->protocol = htons(ETH_P_802_3);
5109 skb_reset_network_header(skb);
5110 skb_reset_mac_header(skb);
5111
5112 local_bh_disable();
5113 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
5114 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP);
5115 local_bh_enable();
5116
5117 return 0;
5118}
5119