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16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/bitmap.h>
21#include <linux/rcupdate.h>
22#include <linux/export.h>
23#include <net/net_namespace.h>
24#include <net/ieee80211_radiotap.h>
25#include <net/cfg80211.h>
26#include <net/mac80211.h>
27#include <net/codel.h>
28#include <net/codel_impl.h>
29#include <asm/unaligned.h>
30#include <net/fq_impl.h>
31
32#include "ieee80211_i.h"
33#include "driver-ops.h"
34#include "led.h"
35#include "mesh.h"
36#include "wep.h"
37#include "wpa.h"
38#include "wme.h"
39#include "rate.h"
40
41
42
43static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
44{
45 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
46
47 u64_stats_update_begin(&tstats->syncp);
48 tstats->tx_packets++;
49 tstats->tx_bytes += len;
50 u64_stats_update_end(&tstats->syncp);
51}
52
53static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
54 struct sk_buff *skb, int group_addr,
55 int next_frag_len)
56{
57 int rate, mrate, erp, dur, i, shift = 0;
58 struct ieee80211_rate *txrate;
59 struct ieee80211_local *local = tx->local;
60 struct ieee80211_supported_band *sband;
61 struct ieee80211_hdr *hdr;
62 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
63 struct ieee80211_chanctx_conf *chanctx_conf;
64 u32 rate_flags = 0;
65
66 rcu_read_lock();
67 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
68 if (chanctx_conf) {
69 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
70 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
71 }
72 rcu_read_unlock();
73
74
75 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
76 return 0;
77
78
79 if (WARN_ON_ONCE(tx->rate.idx < 0))
80 return 0;
81
82 sband = local->hw.wiphy->bands[info->band];
83 txrate = &sband->bitrates[tx->rate.idx];
84
85 erp = txrate->flags & IEEE80211_RATE_ERP_G;
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104 hdr = (struct ieee80211_hdr *)skb->data;
105 if (ieee80211_is_ctl(hdr->frame_control)) {
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120 return 0;
121 }
122
123
124 if (0 )
125 return cpu_to_le16(32768);
126
127 if (group_addr)
128 return 0;
129
130
131
132
133
134
135
136
137
138
139
140 rate = -1;
141
142 mrate = sband->bitrates[0].bitrate;
143 for (i = 0; i < sband->n_bitrates; i++) {
144 struct ieee80211_rate *r = &sband->bitrates[i];
145
146 if (r->bitrate > txrate->bitrate)
147 break;
148
149 if ((rate_flags & r->flags) != rate_flags)
150 continue;
151
152 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
153 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
154
155 switch (sband->band) {
156 case NL80211_BAND_2GHZ: {
157 u32 flag;
158 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
159 flag = IEEE80211_RATE_MANDATORY_G;
160 else
161 flag = IEEE80211_RATE_MANDATORY_B;
162 if (r->flags & flag)
163 mrate = r->bitrate;
164 break;
165 }
166 case NL80211_BAND_5GHZ:
167 if (r->flags & IEEE80211_RATE_MANDATORY_A)
168 mrate = r->bitrate;
169 break;
170 case NL80211_BAND_60GHZ:
171
172 case NUM_NL80211_BANDS:
173 WARN_ON(1);
174 break;
175 }
176 }
177 if (rate == -1) {
178
179
180 rate = DIV_ROUND_UP(mrate, 1 << shift);
181 }
182
183
184 if (ieee80211_is_data_qos(hdr->frame_control) &&
185 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
186 dur = 0;
187 else
188
189
190
191 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
192 tx->sdata->vif.bss_conf.use_short_preamble,
193 shift);
194
195 if (next_frag_len) {
196
197
198 dur *= 2;
199
200 dur += ieee80211_frame_duration(sband->band, next_frag_len,
201 txrate->bitrate, erp,
202 tx->sdata->vif.bss_conf.use_short_preamble,
203 shift);
204 }
205
206 return cpu_to_le16(dur);
207}
208
209
210static ieee80211_tx_result debug_noinline
211ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
212{
213 struct ieee80211_local *local = tx->local;
214 struct ieee80211_if_managed *ifmgd;
215
216
217 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
218 return TX_CONTINUE;
219
220
221 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
222 return TX_CONTINUE;
223
224
225 if (local->hw.conf.dynamic_ps_timeout <= 0)
226 return TX_CONTINUE;
227
228
229 if (local->scanning)
230 return TX_CONTINUE;
231
232 if (!local->ps_sdata)
233 return TX_CONTINUE;
234
235
236 if (local->quiescing)
237 return TX_CONTINUE;
238
239
240 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
241 return TX_CONTINUE;
242
243 ifmgd = &tx->sdata->u.mgd;
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
259 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
260 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
261 return TX_CONTINUE;
262
263 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
264 ieee80211_stop_queues_by_reason(&local->hw,
265 IEEE80211_MAX_QUEUE_MAP,
266 IEEE80211_QUEUE_STOP_REASON_PS,
267 false);
268 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
269 ieee80211_queue_work(&local->hw,
270 &local->dynamic_ps_disable_work);
271 }
272
273
274 if (!ifmgd->associated)
275 return TX_CONTINUE;
276
277 mod_timer(&local->dynamic_ps_timer, jiffies +
278 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
279
280 return TX_CONTINUE;
281}
282
283static ieee80211_tx_result debug_noinline
284ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
285{
286
287 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
288 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
289 bool assoc = false;
290
291 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
292 return TX_CONTINUE;
293
294 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
295 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
296 !ieee80211_is_probe_req(hdr->frame_control) &&
297 !ieee80211_is_nullfunc(hdr->frame_control))
298
299
300
301
302
303
304
305
306
307
308
309 return TX_DROP;
310
311 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
312 return TX_CONTINUE;
313
314 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
315 return TX_CONTINUE;
316
317 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
318 return TX_CONTINUE;
319
320 if (tx->sta)
321 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
322
323 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
324 if (unlikely(!assoc &&
325 ieee80211_is_data(hdr->frame_control))) {
326#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
327 sdata_info(tx->sdata,
328 "dropped data frame to not associated station %pM\n",
329 hdr->addr1);
330#endif
331 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
332 return TX_DROP;
333 }
334 } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
335 ieee80211_is_data(hdr->frame_control) &&
336 !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) {
337
338
339
340
341 return TX_DROP;
342 }
343
344 return TX_CONTINUE;
345}
346
347
348
349
350
351static void purge_old_ps_buffers(struct ieee80211_local *local)
352{
353 int total = 0, purged = 0;
354 struct sk_buff *skb;
355 struct ieee80211_sub_if_data *sdata;
356 struct sta_info *sta;
357
358 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
359 struct ps_data *ps;
360
361 if (sdata->vif.type == NL80211_IFTYPE_AP)
362 ps = &sdata->u.ap.ps;
363 else if (ieee80211_vif_is_mesh(&sdata->vif))
364 ps = &sdata->u.mesh.ps;
365 else
366 continue;
367
368 skb = skb_dequeue(&ps->bc_buf);
369 if (skb) {
370 purged++;
371 ieee80211_free_txskb(&local->hw, skb);
372 }
373 total += skb_queue_len(&ps->bc_buf);
374 }
375
376
377
378
379
380 list_for_each_entry_rcu(sta, &local->sta_list, list) {
381 int ac;
382
383 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
384 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
385 total += skb_queue_len(&sta->ps_tx_buf[ac]);
386 if (skb) {
387 purged++;
388 ieee80211_free_txskb(&local->hw, skb);
389 break;
390 }
391 }
392 }
393
394 local->total_ps_buffered = total;
395 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
396}
397
398static ieee80211_tx_result
399ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
400{
401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
402 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
403 struct ps_data *ps;
404
405
406
407
408
409
410
411
412
413
414 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
415 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
416 if (!tx->sdata->bss)
417 return TX_CONTINUE;
418
419 ps = &tx->sdata->bss->ps;
420 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
421 ps = &tx->sdata->u.mesh.ps;
422 } else {
423 return TX_CONTINUE;
424 }
425
426
427
428 if (ieee80211_has_order(hdr->frame_control))
429 return TX_CONTINUE;
430
431 if (ieee80211_is_probe_req(hdr->frame_control))
432 return TX_CONTINUE;
433
434 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
435 info->hw_queue = tx->sdata->vif.cab_queue;
436
437
438 if (!atomic_read(&ps->num_sta_ps))
439 return TX_CONTINUE;
440
441 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
442
443
444 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
445 return TX_CONTINUE;
446
447
448 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
449 purge_old_ps_buffers(tx->local);
450
451 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
452 ps_dbg(tx->sdata,
453 "BC TX buffer full - dropping the oldest frame\n");
454 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
455 } else
456 tx->local->total_ps_buffered++;
457
458 skb_queue_tail(&ps->bc_buf, tx->skb);
459
460 return TX_QUEUED;
461}
462
463static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
464 struct sk_buff *skb)
465{
466 if (!ieee80211_is_mgmt(fc))
467 return 0;
468
469 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
470 return 0;
471
472 if (!ieee80211_is_robust_mgmt_frame(skb))
473 return 0;
474
475 return 1;
476}
477
478static ieee80211_tx_result
479ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
480{
481 struct sta_info *sta = tx->sta;
482 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
483 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
484 struct ieee80211_local *local = tx->local;
485
486 if (unlikely(!sta))
487 return TX_CONTINUE;
488
489 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
490 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
491 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
492 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
493 int ac = skb_get_queue_mapping(tx->skb);
494
495 if (ieee80211_is_mgmt(hdr->frame_control) &&
496 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
497 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
498 return TX_CONTINUE;
499 }
500
501 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
502 sta->sta.addr, sta->sta.aid, ac);
503 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
504 purge_old_ps_buffers(tx->local);
505
506
507 spin_lock(&sta->ps_lock);
508
509
510
511
512
513 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
514 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
515 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
516 spin_unlock(&sta->ps_lock);
517 return TX_CONTINUE;
518 }
519
520 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
521 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
522 ps_dbg(tx->sdata,
523 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
524 sta->sta.addr, ac);
525 ieee80211_free_txskb(&local->hw, old);
526 } else
527 tx->local->total_ps_buffered++;
528
529 info->control.jiffies = jiffies;
530 info->control.vif = &tx->sdata->vif;
531 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
532 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
533 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
534 spin_unlock(&sta->ps_lock);
535
536 if (!timer_pending(&local->sta_cleanup))
537 mod_timer(&local->sta_cleanup,
538 round_jiffies(jiffies +
539 STA_INFO_CLEANUP_INTERVAL));
540
541
542
543
544
545 sta_info_recalc_tim(sta);
546
547 return TX_QUEUED;
548 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
549 ps_dbg(tx->sdata,
550 "STA %pM in PS mode, but polling/in SP -> send frame\n",
551 sta->sta.addr);
552 }
553
554 return TX_CONTINUE;
555}
556
557static ieee80211_tx_result debug_noinline
558ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
559{
560 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
561 return TX_CONTINUE;
562
563 if (tx->flags & IEEE80211_TX_UNICAST)
564 return ieee80211_tx_h_unicast_ps_buf(tx);
565 else
566 return ieee80211_tx_h_multicast_ps_buf(tx);
567}
568
569static ieee80211_tx_result debug_noinline
570ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
571{
572 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
573
574 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
575 if (tx->sdata->control_port_no_encrypt)
576 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
577 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
578 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
579 }
580
581 return TX_CONTINUE;
582}
583
584static ieee80211_tx_result debug_noinline
585ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
586{
587 struct ieee80211_key *key;
588 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
589 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
590
591 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
592 tx->key = NULL;
593 else if (tx->sta &&
594 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
595 tx->key = key;
596 else if (ieee80211_is_group_privacy_action(tx->skb) &&
597 (key = rcu_dereference(tx->sdata->default_multicast_key)))
598 tx->key = key;
599 else if (ieee80211_is_mgmt(hdr->frame_control) &&
600 is_multicast_ether_addr(hdr->addr1) &&
601 ieee80211_is_robust_mgmt_frame(tx->skb) &&
602 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
603 tx->key = key;
604 else if (is_multicast_ether_addr(hdr->addr1) &&
605 (key = rcu_dereference(tx->sdata->default_multicast_key)))
606 tx->key = key;
607 else if (!is_multicast_ether_addr(hdr->addr1) &&
608 (key = rcu_dereference(tx->sdata->default_unicast_key)))
609 tx->key = key;
610 else
611 tx->key = NULL;
612
613 if (tx->key) {
614 bool skip_hw = false;
615
616
617
618 switch (tx->key->conf.cipher) {
619 case WLAN_CIPHER_SUITE_WEP40:
620 case WLAN_CIPHER_SUITE_WEP104:
621 case WLAN_CIPHER_SUITE_TKIP:
622 if (!ieee80211_is_data_present(hdr->frame_control))
623 tx->key = NULL;
624 break;
625 case WLAN_CIPHER_SUITE_CCMP:
626 case WLAN_CIPHER_SUITE_CCMP_256:
627 case WLAN_CIPHER_SUITE_GCMP:
628 case WLAN_CIPHER_SUITE_GCMP_256:
629 if (!ieee80211_is_data_present(hdr->frame_control) &&
630 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
631 tx->skb) &&
632 !ieee80211_is_group_privacy_action(tx->skb))
633 tx->key = NULL;
634 else
635 skip_hw = (tx->key->conf.flags &
636 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
637 ieee80211_is_mgmt(hdr->frame_control);
638 break;
639 case WLAN_CIPHER_SUITE_AES_CMAC:
640 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
641 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
642 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
643 if (!ieee80211_is_mgmt(hdr->frame_control))
644 tx->key = NULL;
645 break;
646 }
647
648 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
649 !ieee80211_is_deauth(hdr->frame_control)))
650 return TX_DROP;
651
652 if (!skip_hw && tx->key &&
653 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
654 info->control.hw_key = &tx->key->conf;
655 }
656
657 return TX_CONTINUE;
658}
659
660static ieee80211_tx_result debug_noinline
661ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
662{
663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
664 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
665 struct ieee80211_supported_band *sband;
666 u32 len;
667 struct ieee80211_tx_rate_control txrc;
668 struct ieee80211_sta_rates *ratetbl = NULL;
669 bool assoc = false;
670
671 memset(&txrc, 0, sizeof(txrc));
672
673 sband = tx->local->hw.wiphy->bands[info->band];
674
675 len = min_t(u32, tx->skb->len + FCS_LEN,
676 tx->local->hw.wiphy->frag_threshold);
677
678
679 txrc.hw = &tx->local->hw;
680 txrc.sband = sband;
681 txrc.bss_conf = &tx->sdata->vif.bss_conf;
682 txrc.skb = tx->skb;
683 txrc.reported_rate.idx = -1;
684 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
685 if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
686 txrc.max_rate_idx = -1;
687 else
688 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
689
690 if (tx->sdata->rc_has_mcs_mask[info->band])
691 txrc.rate_idx_mcs_mask =
692 tx->sdata->rc_rateidx_mcs_mask[info->band];
693
694 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
695 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
696 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
697 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
698
699
700 if (len > tx->local->hw.wiphy->rts_threshold) {
701 txrc.rts = true;
702 }
703
704 info->control.use_rts = txrc.rts;
705 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
706
707
708
709
710
711
712
713 if (tx->sdata->vif.bss_conf.use_short_preamble &&
714 (ieee80211_is_data(hdr->frame_control) ||
715 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
716 txrc.short_preamble = true;
717
718 info->control.short_preamble = txrc.short_preamble;
719
720
721 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
722 return TX_CONTINUE;
723
724 if (tx->sta)
725 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
726
727
728
729
730
731 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
732 !rate_usable_index_exists(sband, &tx->sta->sta),
733 "%s: Dropped data frame as no usable bitrate found while "
734 "scanning and associated. Target station: "
735 "%pM on %d GHz band\n",
736 tx->sdata->name, hdr->addr1,
737 info->band ? 5 : 2))
738 return TX_DROP;
739
740
741
742
743
744 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
745
746 if (tx->sta && !info->control.skip_table)
747 ratetbl = rcu_dereference(tx->sta->sta.rates);
748
749 if (unlikely(info->control.rates[0].idx < 0)) {
750 if (ratetbl) {
751 struct ieee80211_tx_rate rate = {
752 .idx = ratetbl->rate[0].idx,
753 .flags = ratetbl->rate[0].flags,
754 .count = ratetbl->rate[0].count
755 };
756
757 if (ratetbl->rate[0].idx < 0)
758 return TX_DROP;
759
760 tx->rate = rate;
761 } else {
762 return TX_DROP;
763 }
764 } else {
765 tx->rate = info->control.rates[0];
766 }
767
768 if (txrc.reported_rate.idx < 0) {
769 txrc.reported_rate = tx->rate;
770 if (tx->sta && ieee80211_is_data(hdr->frame_control))
771 tx->sta->tx_stats.last_rate = txrc.reported_rate;
772 } else if (tx->sta)
773 tx->sta->tx_stats.last_rate = txrc.reported_rate;
774
775 if (ratetbl)
776 return TX_CONTINUE;
777
778 if (unlikely(!info->control.rates[0].count))
779 info->control.rates[0].count = 1;
780
781 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
782 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
783 info->control.rates[0].count = 1;
784
785 return TX_CONTINUE;
786}
787
788static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
789{
790 u16 *seq = &sta->tid_seq[tid];
791 __le16 ret = cpu_to_le16(*seq);
792
793
794 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
795
796 return ret;
797}
798
799static ieee80211_tx_result debug_noinline
800ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
801{
802 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
803 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
804 u8 *qc;
805 int tid;
806
807
808
809
810
811
812 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
813 return TX_CONTINUE;
814
815 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
816 return TX_CONTINUE;
817
818 if (ieee80211_hdrlen(hdr->frame_control) < 24)
819 return TX_CONTINUE;
820
821 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
822 return TX_CONTINUE;
823
824
825
826
827
828
829
830 if (!ieee80211_is_data_qos(hdr->frame_control) ||
831 is_multicast_ether_addr(hdr->addr1)) {
832
833 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
834
835 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
836 tx->sdata->sequence_number += 0x10;
837 if (tx->sta)
838 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
839 return TX_CONTINUE;
840 }
841
842
843
844
845
846
847 if (!tx->sta)
848 return TX_CONTINUE;
849
850
851
852 qc = ieee80211_get_qos_ctl(hdr);
853 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
854 tx->sta->tx_stats.msdu[tid]++;
855
856 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
857
858 return TX_CONTINUE;
859}
860
861static int ieee80211_fragment(struct ieee80211_tx_data *tx,
862 struct sk_buff *skb, int hdrlen,
863 int frag_threshold)
864{
865 struct ieee80211_local *local = tx->local;
866 struct ieee80211_tx_info *info;
867 struct sk_buff *tmp;
868 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
869 int pos = hdrlen + per_fragm;
870 int rem = skb->len - hdrlen - per_fragm;
871
872 if (WARN_ON(rem < 0))
873 return -EINVAL;
874
875
876
877 while (rem) {
878 int fraglen = per_fragm;
879
880 if (fraglen > rem)
881 fraglen = rem;
882 rem -= fraglen;
883 tmp = dev_alloc_skb(local->tx_headroom +
884 frag_threshold +
885 tx->sdata->encrypt_headroom +
886 IEEE80211_ENCRYPT_TAILROOM);
887 if (!tmp)
888 return -ENOMEM;
889
890 __skb_queue_tail(&tx->skbs, tmp);
891
892 skb_reserve(tmp,
893 local->tx_headroom + tx->sdata->encrypt_headroom);
894
895
896 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
897
898 info = IEEE80211_SKB_CB(tmp);
899 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
900 IEEE80211_TX_CTL_FIRST_FRAGMENT);
901
902 if (rem)
903 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
904
905 skb_copy_queue_mapping(tmp, skb);
906 tmp->priority = skb->priority;
907 tmp->dev = skb->dev;
908
909
910 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
911 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
912
913 pos += fraglen;
914 }
915
916
917 skb_trim(skb, hdrlen + per_fragm);
918 return 0;
919}
920
921static ieee80211_tx_result debug_noinline
922ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
923{
924 struct sk_buff *skb = tx->skb;
925 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
926 struct ieee80211_hdr *hdr = (void *)skb->data;
927 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
928 int hdrlen;
929 int fragnum;
930
931
932 __skb_queue_tail(&tx->skbs, skb);
933 tx->skb = NULL;
934
935 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
936 return TX_CONTINUE;
937
938 if (tx->local->ops->set_frag_threshold)
939 return TX_CONTINUE;
940
941
942
943
944
945
946 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
947 return TX_DROP;
948
949 hdrlen = ieee80211_hdrlen(hdr->frame_control);
950
951
952 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
953 return TX_DROP;
954
955
956
957
958
959
960
961
962
963 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
964 return TX_DROP;
965
966
967 fragnum = 0;
968
969 skb_queue_walk(&tx->skbs, skb) {
970 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
971
972 hdr = (void *)skb->data;
973 info = IEEE80211_SKB_CB(skb);
974
975 if (!skb_queue_is_last(&tx->skbs, skb)) {
976 hdr->frame_control |= morefrags;
977
978
979
980
981 info->control.rates[1].idx = -1;
982 info->control.rates[2].idx = -1;
983 info->control.rates[3].idx = -1;
984 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
985 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
986 } else {
987 hdr->frame_control &= ~morefrags;
988 }
989 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
990 fragnum++;
991 }
992
993 return TX_CONTINUE;
994}
995
996static ieee80211_tx_result debug_noinline
997ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
998{
999 struct sk_buff *skb;
1000 int ac = -1;
1001
1002 if (!tx->sta)
1003 return TX_CONTINUE;
1004
1005 skb_queue_walk(&tx->skbs, skb) {
1006 ac = skb_get_queue_mapping(skb);
1007 tx->sta->tx_stats.bytes[ac] += skb->len;
1008 }
1009 if (ac >= 0)
1010 tx->sta->tx_stats.packets[ac]++;
1011
1012 return TX_CONTINUE;
1013}
1014
1015static ieee80211_tx_result debug_noinline
1016ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1017{
1018 if (!tx->key)
1019 return TX_CONTINUE;
1020
1021 switch (tx->key->conf.cipher) {
1022 case WLAN_CIPHER_SUITE_WEP40:
1023 case WLAN_CIPHER_SUITE_WEP104:
1024 return ieee80211_crypto_wep_encrypt(tx);
1025 case WLAN_CIPHER_SUITE_TKIP:
1026 return ieee80211_crypto_tkip_encrypt(tx);
1027 case WLAN_CIPHER_SUITE_CCMP:
1028 return ieee80211_crypto_ccmp_encrypt(
1029 tx, IEEE80211_CCMP_MIC_LEN);
1030 case WLAN_CIPHER_SUITE_CCMP_256:
1031 return ieee80211_crypto_ccmp_encrypt(
1032 tx, IEEE80211_CCMP_256_MIC_LEN);
1033 case WLAN_CIPHER_SUITE_AES_CMAC:
1034 return ieee80211_crypto_aes_cmac_encrypt(tx);
1035 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1036 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
1037 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1038 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1039 return ieee80211_crypto_aes_gmac_encrypt(tx);
1040 case WLAN_CIPHER_SUITE_GCMP:
1041 case WLAN_CIPHER_SUITE_GCMP_256:
1042 return ieee80211_crypto_gcmp_encrypt(tx);
1043 default:
1044 return ieee80211_crypto_hw_encrypt(tx);
1045 }
1046
1047 return TX_DROP;
1048}
1049
1050static ieee80211_tx_result debug_noinline
1051ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1052{
1053 struct sk_buff *skb;
1054 struct ieee80211_hdr *hdr;
1055 int next_len;
1056 bool group_addr;
1057
1058 skb_queue_walk(&tx->skbs, skb) {
1059 hdr = (void *) skb->data;
1060 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1061 break;
1062 if (!skb_queue_is_last(&tx->skbs, skb)) {
1063 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1064 next_len = next->len;
1065 } else
1066 next_len = 0;
1067 group_addr = is_multicast_ether_addr(hdr->addr1);
1068
1069 hdr->duration_id =
1070 ieee80211_duration(tx, skb, group_addr, next_len);
1071 }
1072
1073 return TX_CONTINUE;
1074}
1075
1076
1077
1078static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1079 struct sk_buff *skb,
1080 struct ieee80211_tx_info *info,
1081 struct tid_ampdu_tx *tid_tx,
1082 int tid)
1083{
1084 bool queued = false;
1085 bool reset_agg_timer = false;
1086 struct sk_buff *purge_skb = NULL;
1087
1088 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1089 info->flags |= IEEE80211_TX_CTL_AMPDU;
1090 reset_agg_timer = true;
1091 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1092
1093
1094
1095
1096 } else if (!tx->sta->sta.txq[tid]) {
1097 spin_lock(&tx->sta->lock);
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1117
1118 if (!tid_tx) {
1119
1120 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1121 info->flags |= IEEE80211_TX_CTL_AMPDU;
1122 reset_agg_timer = true;
1123 } else {
1124 queued = true;
1125 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1126 clear_sta_flag(tx->sta, WLAN_STA_SP);
1127 ps_dbg(tx->sta->sdata,
1128 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1129 tx->sta->sta.addr, tx->sta->sta.aid);
1130 }
1131 info->control.vif = &tx->sdata->vif;
1132 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1133 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
1134 __skb_queue_tail(&tid_tx->pending, skb);
1135 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1136 purge_skb = __skb_dequeue(&tid_tx->pending);
1137 }
1138 spin_unlock(&tx->sta->lock);
1139
1140 if (purge_skb)
1141 ieee80211_free_txskb(&tx->local->hw, purge_skb);
1142 }
1143
1144
1145 if (reset_agg_timer && tid_tx->timeout)
1146 tid_tx->last_tx = jiffies;
1147
1148 return queued;
1149}
1150
1151
1152
1153
1154
1155
1156static ieee80211_tx_result
1157ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1158 struct ieee80211_tx_data *tx,
1159 struct sta_info *sta, struct sk_buff *skb)
1160{
1161 struct ieee80211_local *local = sdata->local;
1162 struct ieee80211_hdr *hdr;
1163 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1164 int tid;
1165 u8 *qc;
1166
1167 memset(tx, 0, sizeof(*tx));
1168 tx->skb = skb;
1169 tx->local = local;
1170 tx->sdata = sdata;
1171 __skb_queue_head_init(&tx->skbs);
1172
1173
1174
1175
1176
1177
1178 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1179
1180 hdr = (struct ieee80211_hdr *) skb->data;
1181
1182 if (likely(sta)) {
1183 if (!IS_ERR(sta))
1184 tx->sta = sta;
1185 } else {
1186 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1187 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1188 if (!tx->sta && sdata->wdev.use_4addr)
1189 return TX_DROP;
1190 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1191 IEEE80211_TX_CTL_INJECTED) ||
1192 tx->sdata->control_port_protocol == tx->skb->protocol) {
1193 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1194 }
1195 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1196 tx->sta = sta_info_get(sdata, hdr->addr1);
1197 }
1198
1199 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
1200 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
1201 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1202 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1203 struct tid_ampdu_tx *tid_tx;
1204
1205 qc = ieee80211_get_qos_ctl(hdr);
1206 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1207
1208 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1209 if (tid_tx) {
1210 bool queued;
1211
1212 queued = ieee80211_tx_prep_agg(tx, skb, info,
1213 tid_tx, tid);
1214
1215 if (unlikely(queued))
1216 return TX_QUEUED;
1217 }
1218 }
1219
1220 if (is_multicast_ether_addr(hdr->addr1)) {
1221 tx->flags &= ~IEEE80211_TX_UNICAST;
1222 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1223 } else
1224 tx->flags |= IEEE80211_TX_UNICAST;
1225
1226 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1227 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1228 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1229 info->flags & IEEE80211_TX_CTL_AMPDU)
1230 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1231 }
1232
1233 if (!tx->sta)
1234 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1235 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
1236 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1237 ieee80211_check_fast_xmit(tx->sta);
1238 }
1239
1240 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1241
1242 return TX_CONTINUE;
1243}
1244
1245static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1246 struct ieee80211_vif *vif,
1247 struct ieee80211_sta *pubsta,
1248 struct sk_buff *skb)
1249{
1250 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1251 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1252 struct ieee80211_txq *txq = NULL;
1253
1254 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1255 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1256 return NULL;
1257
1258 if (!ieee80211_is_data(hdr->frame_control))
1259 return NULL;
1260
1261 if (pubsta) {
1262 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1263
1264 txq = pubsta->txq[tid];
1265 } else if (vif) {
1266 txq = vif->txq;
1267 }
1268
1269 if (!txq)
1270 return NULL;
1271
1272 return to_txq_info(txq);
1273}
1274
1275static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1276{
1277 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1278}
1279
1280static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi)
1281{
1282 IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif;
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 cparams = &local->cparams;
1345 cstats = &txqi->cstats;
1346
1347 if (flow == &txqi->def_flow)
1348 cvars = &txqi->def_cvars;
1349 else
1350 cvars = &local->cvars[flow - fq->flows];
1351
1352 return codel_dequeue(txqi,
1353 &flow->backlog,
1354 cparams,
1355 cvars,
1356 cstats,
1357 codel_skb_len_func,
1358 codel_skb_time_func,
1359 codel_drop_func,
1360 codel_dequeue_func);
1361}
1362
1363static void fq_skb_free_func(struct fq *fq,
1364 struct fq_tin *tin,
1365 struct fq_flow *flow,
1366 struct sk_buff *skb)
1367{
1368 struct ieee80211_local *local;
1369
1370 local = container_of(fq, struct ieee80211_local, fq);
1371 ieee80211_free_txskb(&local->hw, skb);
1372}
1373
1374static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1375 struct fq_tin *tin,
1376 int idx,
1377 struct sk_buff *skb)
1378{
1379 struct txq_info *txqi;
1380
1381 txqi = container_of(tin, struct txq_info, tin);
1382 return &txqi->def_flow;
1383}
1384
1385static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1386 struct txq_info *txqi,
1387 struct sk_buff *skb)
1388{
1389 struct fq *fq = &local->fq;
1390 struct fq_tin *tin = &txqi->tin;
1391
1392 ieee80211_set_skb_enqueue_time(skb);
1393 fq_tin_enqueue(fq, tin, skb,
1394 fq_skb_free_func,
1395 fq_flow_get_default_func);
1396}
1397
1398void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1399 struct sta_info *sta,
1400 struct txq_info *txqi, int tid)
1401{
1402 fq_tin_init(&txqi->tin);
1403 fq_flow_init(&txqi->def_flow);
1404 codel_vars_init(&txqi->def_cvars);
1405 codel_stats_init(&txqi->cstats);
1406 __skb_queue_head_init(&txqi->frags);
1407
1408 txqi->txq.vif = &sdata->vif;
1409
1410 if (sta) {
1411 txqi->txq.sta = &sta->sta;
1412 sta->sta.txq[tid] = &txqi->txq;
1413 txqi->txq.tid = tid;
1414 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
1415 } else {
1416 sdata->vif.txq = &txqi->txq;
1417 txqi->txq.tid = 0;
1418 txqi->txq.ac = IEEE80211_AC_BE;
1419 }
1420}
1421
1422void ieee80211_txq_purge(struct ieee80211_local *local,
1423 struct txq_info *txqi)
1424{
1425 struct fq *fq = &local->fq;
1426 struct fq_tin *tin = &txqi->tin;
1427
1428 fq_tin_reset(fq, tin, fq_skb_free_func);
1429 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
1430}
1431
1432int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1433{
1434 struct fq *fq = &local->fq;
1435 int ret;
1436 int i;
1437 bool supp_vht = false;
1438 enum nl80211_band band;
1439
1440 if (!local->ops->wake_tx_queue)
1441 return 0;
1442
1443 ret = fq_init(fq, 4096);
1444 if (ret)
1445 return ret;
1446
1447
1448
1449
1450
1451 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1452 struct ieee80211_supported_band *sband;
1453
1454 sband = local->hw.wiphy->bands[band];
1455 if (!sband)
1456 continue;
1457
1458 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1459 }
1460
1461 if (!supp_vht)
1462 fq->memory_limit = 4 << 20;
1463
1464 codel_params_init(&local->cparams);
1465 local->cparams.interval = MS2TIME(100);
1466 local->cparams.target = MS2TIME(20);
1467 local->cparams.ecn = true;
1468
1469 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1470 GFP_KERNEL);
1471 if (!local->cvars) {
1472 spin_lock_bh(&fq->lock);
1473 fq_reset(fq, fq_skb_free_func);
1474 spin_unlock_bh(&fq->lock);
1475 return -ENOMEM;
1476 }
1477
1478 for (i = 0; i < fq->flows_cnt; i++)
1479 codel_vars_init(&local->cvars[i]);
1480
1481 return 0;
1482}
1483
1484void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1485{
1486 struct fq *fq = &local->fq;
1487
1488 if (!local->ops->wake_tx_queue)
1489 return;
1490
1491 kfree(local->cvars);
1492 local->cvars = NULL;
1493
1494 spin_lock_bh(&fq->lock);
1495 fq_reset(fq, fq_skb_free_func);
1496 spin_unlock_bh(&fq->lock);
1497}
1498
1499static bool ieee80211_queue_skb(struct ieee80211_local *local,
1500 struct ieee80211_sub_if_data *sdata,
1501 struct sta_info *sta,
1502 struct sk_buff *skb)
1503{
1504 struct fq *fq = &local->fq;
1505 struct ieee80211_vif *vif;
1506 struct txq_info *txqi;
1507 struct ieee80211_sta *pubsta;
1508
1509 if (!local->ops->wake_tx_queue ||
1510 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1511 return false;
1512
1513 if (sta && sta->uploaded)
1514 pubsta = &sta->sta;
1515 else
1516 pubsta = NULL;
1517
1518 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1519 sdata = container_of(sdata->bss,
1520 struct ieee80211_sub_if_data, u.ap);
1521
1522 vif = &sdata->vif;
1523 txqi = ieee80211_get_txq(local, vif, pubsta, skb);
1524
1525 if (!txqi)
1526 return false;
1527
1528 spin_lock_bh(&fq->lock);
1529 ieee80211_txq_enqueue(local, txqi, skb);
1530 spin_unlock_bh(&fq->lock);
1531
1532 drv_wake_tx_queue(local, txqi);
1533
1534 return true;
1535}
1536
1537static bool ieee80211_tx_frags(struct ieee80211_local *local,
1538 struct ieee80211_vif *vif,
1539 struct ieee80211_sta *sta,
1540 struct sk_buff_head *skbs,
1541 bool txpending)
1542{
1543 struct ieee80211_tx_control control = {};
1544 struct sk_buff *skb, *tmp;
1545 unsigned long flags;
1546
1547 skb_queue_walk_safe(skbs, skb, tmp) {
1548 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1549 int q = info->hw_queue;
1550
1551#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1552 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1553 __skb_unlink(skb, skbs);
1554 ieee80211_free_txskb(&local->hw, skb);
1555 continue;
1556 }
1557#endif
1558
1559 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1560 if (local->queue_stop_reasons[q] ||
1561 (!txpending && !skb_queue_empty(&local->pending[q]))) {
1562 if (unlikely(info->flags &
1563 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1564 if (local->queue_stop_reasons[q] &
1565 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1566
1567
1568
1569
1570
1571
1572 spin_unlock_irqrestore(
1573 &local->queue_stop_reason_lock,
1574 flags);
1575 ieee80211_purge_tx_queue(&local->hw,
1576 skbs);
1577 return true;
1578 }
1579 } else {
1580
1581
1582
1583
1584
1585
1586 if (txpending)
1587 skb_queue_splice_init(skbs,
1588 &local->pending[q]);
1589 else
1590 skb_queue_splice_tail_init(skbs,
1591 &local->pending[q]);
1592
1593 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1594 flags);
1595 return false;
1596 }
1597 }
1598 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1599
1600 info->control.vif = vif;
1601 control.sta = sta;
1602
1603 __skb_unlink(skb, skbs);
1604 drv_tx(local, &control, skb);
1605 }
1606
1607 return true;
1608}
1609
1610
1611
1612
1613static bool __ieee80211_tx(struct ieee80211_local *local,
1614 struct sk_buff_head *skbs, int led_len,
1615 struct sta_info *sta, bool txpending)
1616{
1617 struct ieee80211_tx_info *info;
1618 struct ieee80211_sub_if_data *sdata;
1619 struct ieee80211_vif *vif;
1620 struct ieee80211_sta *pubsta;
1621 struct sk_buff *skb;
1622 bool result = true;
1623 __le16 fc;
1624
1625 if (WARN_ON(skb_queue_empty(skbs)))
1626 return true;
1627
1628 skb = skb_peek(skbs);
1629 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1630 info = IEEE80211_SKB_CB(skb);
1631 sdata = vif_to_sdata(info->control.vif);
1632 if (sta && !sta->uploaded)
1633 sta = NULL;
1634
1635 if (sta)
1636 pubsta = &sta->sta;
1637 else
1638 pubsta = NULL;
1639
1640 switch (sdata->vif.type) {
1641 case NL80211_IFTYPE_MONITOR:
1642 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1643 vif = &sdata->vif;
1644 break;
1645 }
1646 sdata = rcu_dereference(local->monitor_sdata);
1647 if (sdata) {
1648 vif = &sdata->vif;
1649 info->hw_queue =
1650 vif->hw_queue[skb_get_queue_mapping(skb)];
1651 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1652 ieee80211_purge_tx_queue(&local->hw, skbs);
1653 return true;
1654 } else
1655 vif = NULL;
1656 break;
1657 case NL80211_IFTYPE_AP_VLAN:
1658 sdata = container_of(sdata->bss,
1659 struct ieee80211_sub_if_data, u.ap);
1660
1661 default:
1662 vif = &sdata->vif;
1663 break;
1664 }
1665
1666 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1667 txpending);
1668
1669 ieee80211_tpt_led_trig_tx(local, fc, led_len);
1670
1671 WARN_ON_ONCE(!skb_queue_empty(skbs));
1672
1673 return result;
1674}
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1685{
1686 ieee80211_tx_result res = TX_DROP;
1687
1688#define CALL_TXH(txh) \
1689 do { \
1690 res = txh(tx); \
1691 if (res != TX_CONTINUE) \
1692 goto txh_done; \
1693 } while (0)
1694
1695 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1696 CALL_TXH(ieee80211_tx_h_check_assoc);
1697 CALL_TXH(ieee80211_tx_h_ps_buf);
1698 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1699 CALL_TXH(ieee80211_tx_h_select_key);
1700 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1701 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1702
1703 txh_done:
1704 if (unlikely(res == TX_DROP)) {
1705 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1706 if (tx->skb)
1707 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1708 else
1709 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1710 return -1;
1711 } else if (unlikely(res == TX_QUEUED)) {
1712 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1713 return -1;
1714 }
1715
1716 return 0;
1717}
1718
1719
1720
1721
1722
1723static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1724{
1725 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1726 ieee80211_tx_result res = TX_CONTINUE;
1727
1728 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1729 __skb_queue_tail(&tx->skbs, tx->skb);
1730 tx->skb = NULL;
1731 goto txh_done;
1732 }
1733
1734 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1735 CALL_TXH(ieee80211_tx_h_sequence);
1736 CALL_TXH(ieee80211_tx_h_fragment);
1737
1738 CALL_TXH(ieee80211_tx_h_stats);
1739 CALL_TXH(ieee80211_tx_h_encrypt);
1740 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1741 CALL_TXH(ieee80211_tx_h_calculate_duration);
1742#undef CALL_TXH
1743
1744 txh_done:
1745 if (unlikely(res == TX_DROP)) {
1746 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1747 if (tx->skb)
1748 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1749 else
1750 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1751 return -1;
1752 } else if (unlikely(res == TX_QUEUED)) {
1753 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1754 return -1;
1755 }
1756
1757 return 0;
1758}
1759
1760static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1761{
1762 int r = invoke_tx_handlers_early(tx);
1763
1764 if (r)
1765 return r;
1766 return invoke_tx_handlers_late(tx);
1767}
1768
1769bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1770 struct ieee80211_vif *vif, struct sk_buff *skb,
1771 int band, struct ieee80211_sta **sta)
1772{
1773 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1774 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1775 struct ieee80211_tx_data tx;
1776 struct sk_buff *skb2;
1777
1778 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
1779 return false;
1780
1781 info->band = band;
1782 info->control.vif = vif;
1783 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1784
1785 if (invoke_tx_handlers(&tx))
1786 return false;
1787
1788 if (sta) {
1789 if (tx.sta)
1790 *sta = &tx.sta->sta;
1791 else
1792 *sta = NULL;
1793 }
1794
1795
1796 skb2 = __skb_dequeue(&tx.skbs);
1797 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1798 ieee80211_free_txskb(hw, skb2);
1799 ieee80211_purge_tx_queue(hw, &tx.skbs);
1800 return false;
1801 }
1802
1803 return true;
1804}
1805EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1806
1807
1808
1809
1810static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1811 struct sta_info *sta, struct sk_buff *skb,
1812 bool txpending)
1813{
1814 struct ieee80211_local *local = sdata->local;
1815 struct ieee80211_tx_data tx;
1816 ieee80211_tx_result res_prepare;
1817 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1818 bool result = true;
1819 int led_len;
1820
1821 if (unlikely(skb->len < 10)) {
1822 dev_kfree_skb(skb);
1823 return true;
1824 }
1825
1826
1827 led_len = skb->len;
1828 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
1829
1830 if (unlikely(res_prepare == TX_DROP)) {
1831 ieee80211_free_txskb(&local->hw, skb);
1832 return true;
1833 } else if (unlikely(res_prepare == TX_QUEUED)) {
1834 return true;
1835 }
1836
1837
1838 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1839 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1840 info->hw_queue =
1841 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1842
1843 if (invoke_tx_handlers_early(&tx))
1844 return false;
1845
1846 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1847 return true;
1848
1849 if (!invoke_tx_handlers_late(&tx))
1850 result = __ieee80211_tx(local, &tx.skbs, led_len,
1851 tx.sta, txpending);
1852
1853 return result;
1854}
1855
1856
1857
1858static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1859 struct sk_buff *skb,
1860 int head_need, bool may_encrypt)
1861{
1862 struct ieee80211_local *local = sdata->local;
1863 int tail_need = 0;
1864
1865 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
1866 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1867 tail_need -= skb_tailroom(skb);
1868 tail_need = max_t(int, tail_need, 0);
1869 }
1870
1871 if (skb_cloned(skb) &&
1872 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1873 !skb_clone_writable(skb, ETH_HLEN) ||
1874 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
1875 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1876 else if (head_need || tail_need)
1877 I802_DEBUG_INC(local->tx_expand_skb_head);
1878 else
1879 return 0;
1880
1881 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
1882 wiphy_debug(local->hw.wiphy,
1883 "failed to reallocate TX buffer\n");
1884 return -ENOMEM;
1885 }
1886
1887 return 0;
1888}
1889
1890void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1891 struct sta_info *sta, struct sk_buff *skb)
1892{
1893 struct ieee80211_local *local = sdata->local;
1894 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1895 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1896 int headroom;
1897 bool may_encrypt;
1898
1899 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
1900
1901 headroom = local->tx_headroom;
1902 if (may_encrypt)
1903 headroom += sdata->encrypt_headroom;
1904 headroom -= skb_headroom(skb);
1905 headroom = max_t(int, 0, headroom);
1906
1907 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
1908 ieee80211_free_txskb(&local->hw, skb);
1909 return;
1910 }
1911
1912 hdr = (struct ieee80211_hdr *) skb->data;
1913 info->control.vif = &sdata->vif;
1914
1915 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1916 if (ieee80211_is_data(hdr->frame_control) &&
1917 is_unicast_ether_addr(hdr->addr1)) {
1918 if (mesh_nexthop_resolve(sdata, skb))
1919 return;
1920 } else {
1921 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1922 }
1923 }
1924
1925 ieee80211_set_qos_hdr(sdata, skb);
1926 ieee80211_tx(sdata, sta, skb, false);
1927}
1928
1929static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1930 struct sk_buff *skb)
1931{
1932 struct ieee80211_radiotap_iterator iterator;
1933 struct ieee80211_radiotap_header *rthdr =
1934 (struct ieee80211_radiotap_header *) skb->data;
1935 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1936 struct ieee80211_supported_band *sband =
1937 local->hw.wiphy->bands[info->band];
1938 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1939 NULL);
1940 u16 txflags;
1941 u16 rate = 0;
1942 bool rate_found = false;
1943 u8 rate_retries = 0;
1944 u16 rate_flags = 0;
1945 u8 mcs_known, mcs_flags, mcs_bw;
1946 u16 vht_known;
1947 u8 vht_mcs = 0, vht_nss = 0;
1948 int i;
1949
1950 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1951 IEEE80211_TX_CTL_DONTFRAG;
1952
1953
1954
1955
1956
1957
1958
1959 while (!ret) {
1960 ret = ieee80211_radiotap_iterator_next(&iterator);
1961
1962 if (ret)
1963 continue;
1964
1965
1966 switch (iterator.this_arg_index) {
1967
1968
1969
1970
1971
1972
1973 case IEEE80211_RADIOTAP_FLAGS:
1974 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1975
1976
1977
1978
1979
1980
1981
1982 if (skb->len < (iterator._max_length + FCS_LEN))
1983 return false;
1984
1985 skb_trim(skb, skb->len - FCS_LEN);
1986 }
1987 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1988 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1989 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1990 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1991 break;
1992
1993 case IEEE80211_RADIOTAP_TX_FLAGS:
1994 txflags = get_unaligned_le16(iterator.this_arg);
1995 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1996 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1997 break;
1998
1999 case IEEE80211_RADIOTAP_RATE:
2000 rate = *iterator.this_arg;
2001 rate_flags = 0;
2002 rate_found = true;
2003 break;
2004
2005 case IEEE80211_RADIOTAP_DATA_RETRIES:
2006 rate_retries = *iterator.this_arg;
2007 break;
2008
2009 case IEEE80211_RADIOTAP_MCS:
2010 mcs_known = iterator.this_arg[0];
2011 mcs_flags = iterator.this_arg[1];
2012 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2013 break;
2014
2015 rate_found = true;
2016 rate = iterator.this_arg[2];
2017 rate_flags = IEEE80211_TX_RC_MCS;
2018
2019 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2020 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2021 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2022
2023 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2024 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2025 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2026 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2027 break;
2028
2029 case IEEE80211_RADIOTAP_VHT:
2030 vht_known = get_unaligned_le16(iterator.this_arg);
2031 rate_found = true;
2032
2033 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2034 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2035 (iterator.this_arg[2] &
2036 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2037 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2038 if (vht_known &
2039 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2040 if (iterator.this_arg[3] == 1)
2041 rate_flags |=
2042 IEEE80211_TX_RC_40_MHZ_WIDTH;
2043 else if (iterator.this_arg[3] == 4)
2044 rate_flags |=
2045 IEEE80211_TX_RC_80_MHZ_WIDTH;
2046 else if (iterator.this_arg[3] == 11)
2047 rate_flags |=
2048 IEEE80211_TX_RC_160_MHZ_WIDTH;
2049 }
2050
2051 vht_mcs = iterator.this_arg[4] >> 4;
2052 vht_nss = iterator.this_arg[4] & 0xF;
2053 break;
2054
2055
2056
2057
2058
2059
2060
2061 default:
2062 break;
2063 }
2064 }
2065
2066 if (ret != -ENOENT)
2067 return false;
2068
2069 if (rate_found) {
2070 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2071
2072 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2073 info->control.rates[i].idx = -1;
2074 info->control.rates[i].flags = 0;
2075 info->control.rates[i].count = 0;
2076 }
2077
2078 if (rate_flags & IEEE80211_TX_RC_MCS) {
2079 info->control.rates[0].idx = rate;
2080 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2081 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2082 vht_nss);
2083 } else {
2084 for (i = 0; i < sband->n_bitrates; i++) {
2085 if (rate * 5 != sband->bitrates[i].bitrate)
2086 continue;
2087
2088 info->control.rates[0].idx = i;
2089 break;
2090 }
2091 }
2092
2093 if (info->control.rates[0].idx < 0)
2094 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2095
2096 info->control.rates[0].flags = rate_flags;
2097 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2098 local->hw.max_rate_tries);
2099 }
2100
2101
2102
2103
2104
2105
2106 skb_pull(skb, iterator._max_length);
2107
2108 return true;
2109}
2110
2111netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2112 struct net_device *dev)
2113{
2114 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2115 struct ieee80211_chanctx_conf *chanctx_conf;
2116 struct ieee80211_radiotap_header *prthdr =
2117 (struct ieee80211_radiotap_header *)skb->data;
2118 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2119 struct ieee80211_hdr *hdr;
2120 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2121 struct cfg80211_chan_def *chandef;
2122 u16 len_rthdr;
2123 int hdrlen;
2124
2125
2126 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2127 goto fail;
2128
2129
2130 if (unlikely(prthdr->it_version))
2131 goto fail;
2132
2133
2134 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2135
2136
2137 if (unlikely(skb->len < len_rthdr))
2138 goto fail;
2139
2140
2141
2142
2143
2144
2145
2146 skb_set_mac_header(skb, len_rthdr);
2147
2148
2149
2150
2151 skb_set_network_header(skb, len_rthdr);
2152 skb_set_transport_header(skb, len_rthdr);
2153
2154 if (skb->len < len_rthdr + 2)
2155 goto fail;
2156
2157 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2158 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2159
2160 if (skb->len < len_rthdr + hdrlen)
2161 goto fail;
2162
2163
2164
2165
2166
2167 if (ieee80211_is_data(hdr->frame_control) &&
2168 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2169 u8 *payload = (u8 *)hdr + hdrlen;
2170
2171 if (ether_addr_equal(payload, rfc1042_header))
2172 skb->protocol = cpu_to_be16((payload[6] << 8) |
2173 payload[7]);
2174 }
2175
2176 memset(info, 0, sizeof(*info));
2177
2178 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2179 IEEE80211_TX_CTL_INJECTED;
2180
2181 rcu_read_lock();
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2192
2193 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2194 if (!ieee80211_sdata_running(tmp_sdata))
2195 continue;
2196 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2197 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2198 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2199 continue;
2200 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
2201 sdata = tmp_sdata;
2202 break;
2203 }
2204 }
2205
2206 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2207 if (!chanctx_conf) {
2208 tmp_sdata = rcu_dereference(local->monitor_sdata);
2209 if (tmp_sdata)
2210 chanctx_conf =
2211 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2212 }
2213
2214 if (chanctx_conf)
2215 chandef = &chanctx_conf->def;
2216 else if (!local->use_chanctx)
2217 chandef = &local->_oper_chandef;
2218 else
2219 goto fail_rcu;
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2238 sdata->vif.type))
2239 goto fail_rcu;
2240
2241 info->band = chandef->chan->band;
2242
2243
2244 if (!ieee80211_parse_tx_radiotap(local, skb))
2245 goto fail_rcu;
2246
2247 ieee80211_xmit(sdata, NULL, skb);
2248 rcu_read_unlock();
2249
2250 return NETDEV_TX_OK;
2251
2252fail_rcu:
2253 rcu_read_unlock();
2254fail:
2255 dev_kfree_skb(skb);
2256 return NETDEV_TX_OK;
2257}
2258
2259static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2260{
2261 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2262
2263 return ethertype == ETH_P_TDLS &&
2264 skb->len > 14 &&
2265 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2266}
2267
2268static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2269 struct sk_buff *skb,
2270 struct sta_info **sta_out)
2271{
2272 struct sta_info *sta;
2273
2274 switch (sdata->vif.type) {
2275 case NL80211_IFTYPE_AP_VLAN:
2276 sta = rcu_dereference(sdata->u.vlan.sta);
2277 if (sta) {
2278 *sta_out = sta;
2279 return 0;
2280 } else if (sdata->wdev.use_4addr) {
2281 return -ENOLINK;
2282 }
2283
2284 case NL80211_IFTYPE_AP:
2285 case NL80211_IFTYPE_OCB:
2286 case NL80211_IFTYPE_ADHOC:
2287 if (is_multicast_ether_addr(skb->data)) {
2288 *sta_out = ERR_PTR(-ENOENT);
2289 return 0;
2290 }
2291 sta = sta_info_get_bss(sdata, skb->data);
2292 break;
2293 case NL80211_IFTYPE_WDS:
2294 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2295 break;
2296#ifdef CONFIG_MAC80211_MESH
2297 case NL80211_IFTYPE_MESH_POINT:
2298
2299 *sta_out = NULL;
2300 return 0;
2301#endif
2302 case NL80211_IFTYPE_STATION:
2303 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2304 sta = sta_info_get(sdata, skb->data);
2305 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2306 if (test_sta_flag(sta,
2307 WLAN_STA_TDLS_PEER_AUTH)) {
2308 *sta_out = sta;
2309 return 0;
2310 }
2311
2312
2313
2314
2315
2316
2317
2318
2319 if (!ieee80211_is_tdls_setup(skb))
2320 return -EINVAL;
2321 }
2322
2323 }
2324
2325 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2326 if (!sta)
2327 return -ENOLINK;
2328 break;
2329 default:
2330 return -EINVAL;
2331 }
2332
2333 *sta_out = sta ?: ERR_PTR(-ENOENT);
2334 return 0;
2335}
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2356 struct sk_buff *skb, u32 info_flags,
2357 struct sta_info *sta)
2358{
2359 struct ieee80211_local *local = sdata->local;
2360 struct ieee80211_tx_info *info;
2361 int head_need;
2362 u16 ethertype, hdrlen, meshhdrlen = 0;
2363 __le16 fc;
2364 struct ieee80211_hdr hdr;
2365 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2366 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2367 const u8 *encaps_data;
2368 int encaps_len, skip_header_bytes;
2369 bool wme_sta = false, authorized = false;
2370 bool tdls_peer;
2371 bool multicast;
2372 u16 info_id = 0;
2373 struct ieee80211_chanctx_conf *chanctx_conf;
2374 struct ieee80211_sub_if_data *ap_sdata;
2375 enum nl80211_band band;
2376 int ret;
2377
2378 if (IS_ERR(sta))
2379 sta = NULL;
2380
2381
2382
2383 ethertype = (skb->data[12] << 8) | skb->data[13];
2384 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2385
2386 switch (sdata->vif.type) {
2387 case NL80211_IFTYPE_AP_VLAN:
2388 if (sdata->wdev.use_4addr) {
2389 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2390
2391 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2392 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2393 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2394 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2395 hdrlen = 30;
2396 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2397 wme_sta = sta->sta.wme;
2398 }
2399 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2400 u.ap);
2401 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
2402 if (!chanctx_conf) {
2403 ret = -ENOTCONN;
2404 goto free;
2405 }
2406 band = chanctx_conf->def.chan->band;
2407 if (sdata->wdev.use_4addr)
2408 break;
2409
2410 case NL80211_IFTYPE_AP:
2411 if (sdata->vif.type == NL80211_IFTYPE_AP)
2412 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2413 if (!chanctx_conf) {
2414 ret = -ENOTCONN;
2415 goto free;
2416 }
2417 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2418
2419 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2420 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2421 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2422 hdrlen = 24;
2423 band = chanctx_conf->def.chan->band;
2424 break;
2425 case NL80211_IFTYPE_WDS:
2426 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2427
2428 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
2429 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2430 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2431 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2432 hdrlen = 30;
2433
2434
2435
2436
2437 band = local->hw.conf.chandef.chan->band;
2438 break;
2439#ifdef CONFIG_MAC80211_MESH
2440 case NL80211_IFTYPE_MESH_POINT:
2441 if (!is_multicast_ether_addr(skb->data)) {
2442 struct sta_info *next_hop;
2443 bool mpp_lookup = true;
2444
2445 mpath = mesh_path_lookup(sdata, skb->data);
2446 if (mpath) {
2447 mpp_lookup = false;
2448 next_hop = rcu_dereference(mpath->next_hop);
2449 if (!next_hop ||
2450 !(mpath->flags & (MESH_PATH_ACTIVE |
2451 MESH_PATH_RESOLVING)))
2452 mpp_lookup = true;
2453 }
2454
2455 if (mpp_lookup) {
2456 mppath = mpp_path_lookup(sdata, skb->data);
2457 if (mppath)
2458 mppath->exp_time = jiffies;
2459 }
2460
2461 if (mppath && mpath)
2462 mesh_path_del(sdata, mpath->dst);
2463 }
2464
2465
2466
2467
2468
2469
2470
2471 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2472 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
2473 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2474 skb->data, skb->data + ETH_ALEN);
2475 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2476 NULL, NULL);
2477 } else {
2478
2479
2480
2481
2482
2483
2484 const u8 *mesh_da = skb->data;
2485
2486 if (mppath)
2487 mesh_da = mppath->mpp;
2488 else if (mpath)
2489 mesh_da = mpath->dst;
2490
2491 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2492 mesh_da, sdata->vif.addr);
2493 if (is_multicast_ether_addr(mesh_da))
2494
2495 meshhdrlen = ieee80211_new_mesh_header(
2496 sdata, &mesh_hdr,
2497 skb->data + ETH_ALEN, NULL);
2498 else
2499
2500 meshhdrlen = ieee80211_new_mesh_header(
2501 sdata, &mesh_hdr, skb->data,
2502 skb->data + ETH_ALEN);
2503
2504 }
2505 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2506 if (!chanctx_conf) {
2507 ret = -ENOTCONN;
2508 goto free;
2509 }
2510 band = chanctx_conf->def.chan->band;
2511 break;
2512#endif
2513 case NL80211_IFTYPE_STATION:
2514
2515 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
2516
2517 if (tdls_peer) {
2518
2519 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2520 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2521 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2522 hdrlen = 24;
2523 } else if (sdata->u.mgd.use_4addr &&
2524 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2525 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2526 IEEE80211_FCTL_TODS);
2527
2528 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2529 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2530 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2531 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2532 hdrlen = 30;
2533 } else {
2534 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2535
2536 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2537 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2538 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2539 hdrlen = 24;
2540 }
2541 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2542 if (!chanctx_conf) {
2543 ret = -ENOTCONN;
2544 goto free;
2545 }
2546 band = chanctx_conf->def.chan->band;
2547 break;
2548 case NL80211_IFTYPE_OCB:
2549
2550 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2551 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2552 eth_broadcast_addr(hdr.addr3);
2553 hdrlen = 24;
2554 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2555 if (!chanctx_conf) {
2556 ret = -ENOTCONN;
2557 goto free;
2558 }
2559 band = chanctx_conf->def.chan->band;
2560 break;
2561 case NL80211_IFTYPE_ADHOC:
2562
2563 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2564 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2565 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2566 hdrlen = 24;
2567 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2568 if (!chanctx_conf) {
2569 ret = -ENOTCONN;
2570 goto free;
2571 }
2572 band = chanctx_conf->def.chan->band;
2573 break;
2574 default:
2575 ret = -EINVAL;
2576 goto free;
2577 }
2578
2579 multicast = is_multicast_ether_addr(hdr.addr1);
2580
2581
2582 if (sta) {
2583 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2584 wme_sta = sta->sta.wme;
2585 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2586
2587 wme_sta = true;
2588 }
2589
2590
2591 if (wme_sta) {
2592 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2593 hdrlen += 2;
2594 }
2595
2596
2597
2598
2599
2600 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2601 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2602 !multicast && !authorized &&
2603 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2604 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
2605#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2606 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2607 sdata->name, hdr.addr1);
2608#endif
2609
2610 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2611
2612 ret = -EPERM;
2613 goto free;
2614 }
2615
2616 if (unlikely(!multicast && skb->sk &&
2617 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
2618 struct sk_buff *ack_skb = skb_clone_sk(skb);
2619
2620 if (ack_skb) {
2621 unsigned long flags;
2622 int id;
2623
2624 spin_lock_irqsave(&local->ack_status_lock, flags);
2625 id = idr_alloc(&local->ack_status_frames, ack_skb,
2626 1, 0x10000, GFP_ATOMIC);
2627 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2628
2629 if (id >= 0) {
2630 info_id = id;
2631 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2632 } else {
2633 kfree_skb(ack_skb);
2634 }
2635 }
2636 }
2637
2638
2639
2640
2641 if (skb_shared(skb)) {
2642 struct sk_buff *tmp_skb = skb;
2643
2644
2645 WARN_ON(info_id);
2646
2647 skb = skb_clone(skb, GFP_ATOMIC);
2648 kfree_skb(tmp_skb);
2649
2650 if (!skb) {
2651 ret = -ENOMEM;
2652 goto free;
2653 }
2654 }
2655
2656 hdr.frame_control = fc;
2657 hdr.duration_id = 0;
2658 hdr.seq_ctrl = 0;
2659
2660 skip_header_bytes = ETH_HLEN;
2661 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2662 encaps_data = bridge_tunnel_header;
2663 encaps_len = sizeof(bridge_tunnel_header);
2664 skip_header_bytes -= 2;
2665 } else if (ethertype >= ETH_P_802_3_MIN) {
2666 encaps_data = rfc1042_header;
2667 encaps_len = sizeof(rfc1042_header);
2668 skip_header_bytes -= 2;
2669 } else {
2670 encaps_data = NULL;
2671 encaps_len = 0;
2672 }
2673
2674 skb_pull(skb, skip_header_bytes);
2675 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689 if (head_need > 0 || skb_cloned(skb)) {
2690 head_need += sdata->encrypt_headroom;
2691 head_need += local->tx_headroom;
2692 head_need = max_t(int, 0, head_need);
2693 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2694 ieee80211_free_txskb(&local->hw, skb);
2695 skb = NULL;
2696 return ERR_PTR(-ENOMEM);
2697 }
2698 }
2699
2700 if (encaps_data)
2701 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2702
2703#ifdef CONFIG_MAC80211_MESH
2704 if (meshhdrlen > 0)
2705 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2706#endif
2707
2708 if (ieee80211_is_data_qos(fc)) {
2709 __le16 *qos_control;
2710
2711 qos_control = (__le16 *) skb_push(skb, 2);
2712 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2713
2714
2715
2716
2717 *qos_control = 0;
2718 } else
2719 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2720
2721 skb_reset_mac_header(skb);
2722
2723 info = IEEE80211_SKB_CB(skb);
2724 memset(info, 0, sizeof(*info));
2725
2726 info->flags = info_flags;
2727 info->ack_frame_id = info_id;
2728 info->band = band;
2729
2730 return skb;
2731 free:
2732 kfree_skb(skb);
2733 return ERR_PTR(ret);
2734}
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757void ieee80211_check_fast_xmit(struct sta_info *sta)
2758{
2759 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2760 struct ieee80211_local *local = sta->local;
2761 struct ieee80211_sub_if_data *sdata = sta->sdata;
2762 struct ieee80211_hdr *hdr = (void *)build.hdr;
2763 struct ieee80211_chanctx_conf *chanctx_conf;
2764 __le16 fc;
2765
2766 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
2767 return;
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781 spin_lock_bh(&sta->lock);
2782 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2783 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2784 sdata->vif.type == NL80211_IFTYPE_STATION)
2785 goto out;
2786
2787 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2788 goto out;
2789
2790 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2791 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2792 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2793 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
2794 goto out;
2795
2796 if (sdata->noack_map)
2797 goto out;
2798
2799
2800 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2801 !local->ops->set_frag_threshold)
2802 goto out;
2803
2804 rcu_read_lock();
2805 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2806 if (!chanctx_conf) {
2807 rcu_read_unlock();
2808 goto out;
2809 }
2810 build.band = chanctx_conf->def.chan->band;
2811 rcu_read_unlock();
2812
2813 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2814
2815 switch (sdata->vif.type) {
2816 case NL80211_IFTYPE_ADHOC:
2817
2818 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2819 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2820 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2821 build.hdr_len = 24;
2822 break;
2823 case NL80211_IFTYPE_STATION:
2824 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2825
2826 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2827 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2828 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2829 build.hdr_len = 24;
2830 break;
2831 }
2832
2833 if (sdata->u.mgd.use_4addr) {
2834
2835 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2836 IEEE80211_FCTL_TODS);
2837
2838 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2839 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2840 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2841 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2842 build.hdr_len = 30;
2843 break;
2844 }
2845 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2846
2847 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2848 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2849 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2850 build.hdr_len = 24;
2851 break;
2852 case NL80211_IFTYPE_AP_VLAN:
2853 if (sdata->wdev.use_4addr) {
2854 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2855 IEEE80211_FCTL_TODS);
2856
2857 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2858 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2859 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2860 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2861 build.hdr_len = 30;
2862 break;
2863 }
2864
2865 case NL80211_IFTYPE_AP:
2866 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2867
2868 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2869 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2870 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2871 build.hdr_len = 24;
2872 break;
2873 default:
2874
2875 goto out;
2876 }
2877
2878 if (sta->sta.wme) {
2879 build.hdr_len += 2;
2880 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2881 }
2882
2883
2884
2885
2886
2887
2888 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2889 if (!build.key)
2890 build.key = rcu_access_pointer(sdata->default_unicast_key);
2891 if (build.key) {
2892 bool gen_iv, iv_spc, mmic;
2893
2894 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2895 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2896 mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC;
2897
2898
2899 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2900 goto out;
2901
2902 switch (build.key->conf.cipher) {
2903 case WLAN_CIPHER_SUITE_CCMP:
2904 case WLAN_CIPHER_SUITE_CCMP_256:
2905
2906 if (gen_iv) {
2907 (build.hdr + build.hdr_len)[3] =
2908 0x20 | (build.key->conf.keyidx << 6);
2909 build.pn_offs = build.hdr_len;
2910 }
2911 if (gen_iv || iv_spc)
2912 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2913 break;
2914 case WLAN_CIPHER_SUITE_GCMP:
2915 case WLAN_CIPHER_SUITE_GCMP_256:
2916
2917 if (gen_iv) {
2918 (build.hdr + build.hdr_len)[3] =
2919 0x20 | (build.key->conf.keyidx << 6);
2920 build.pn_offs = build.hdr_len;
2921 }
2922 if (gen_iv || iv_spc)
2923 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2924 break;
2925 case WLAN_CIPHER_SUITE_TKIP:
2926
2927 if (mmic || gen_iv)
2928 goto out;
2929 if (iv_spc)
2930 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2931 break;
2932 case WLAN_CIPHER_SUITE_WEP40:
2933 case WLAN_CIPHER_SUITE_WEP104:
2934
2935 if (gen_iv)
2936 goto out;
2937 if (iv_spc)
2938 build.hdr_len += IEEE80211_WEP_IV_LEN;
2939 break;
2940 case WLAN_CIPHER_SUITE_AES_CMAC:
2941 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2942 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2943 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2944 WARN(1,
2945 "management cipher suite 0x%x enabled for data\n",
2946 build.key->conf.cipher);
2947 goto out;
2948 default:
2949
2950 if (WARN_ON(gen_iv))
2951 goto out;
2952
2953 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2954 break;
2955
2956 if (iv_spc &&
2957 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2958 goto out;
2959 if (iv_spc)
2960 build.hdr_len += build.key->conf.iv_len;
2961 }
2962
2963 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2964 }
2965
2966 hdr->frame_control = fc;
2967
2968 memcpy(build.hdr + build.hdr_len,
2969 rfc1042_header, sizeof(rfc1042_header));
2970 build.hdr_len += sizeof(rfc1042_header);
2971
2972 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
2973
2974 if (!fast_tx)
2975 goto out;
2976
2977 out:
2978
2979 old = rcu_dereference_protected(sta->fast_tx,
2980 lockdep_is_held(&sta->lock));
2981 rcu_assign_pointer(sta->fast_tx, fast_tx);
2982 if (old)
2983 kfree_rcu(old, rcu_head);
2984 spin_unlock_bh(&sta->lock);
2985}
2986
2987void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
2988{
2989 struct sta_info *sta;
2990
2991 rcu_read_lock();
2992 list_for_each_entry_rcu(sta, &local->sta_list, list)
2993 ieee80211_check_fast_xmit(sta);
2994 rcu_read_unlock();
2995}
2996
2997void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
2998{
2999 struct ieee80211_local *local = sdata->local;
3000 struct sta_info *sta;
3001
3002 rcu_read_lock();
3003
3004 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3005 if (sdata != sta->sdata &&
3006 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3007 continue;
3008 ieee80211_check_fast_xmit(sta);
3009 }
3010
3011 rcu_read_unlock();
3012}
3013
3014void ieee80211_clear_fast_xmit(struct sta_info *sta)
3015{
3016 struct ieee80211_fast_tx *fast_tx;
3017
3018 spin_lock_bh(&sta->lock);
3019 fast_tx = rcu_dereference_protected(sta->fast_tx,
3020 lockdep_is_held(&sta->lock));
3021 RCU_INIT_POINTER(sta->fast_tx, NULL);
3022 spin_unlock_bh(&sta->lock);
3023
3024 if (fast_tx)
3025 kfree_rcu(fast_tx, rcu_head);
3026}
3027
3028static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3029 struct sk_buff *skb, int headroom,
3030 int *subframe_len)
3031{
3032 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3033 int padding = (4 - amsdu_len) & 3;
3034
3035 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3036 I802_DEBUG_INC(local->tx_expand_skb_head);
3037
3038 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3039 wiphy_debug(local->hw.wiphy,
3040 "failed to reallocate TX buffer\n");
3041 return false;
3042 }
3043 }
3044
3045 if (padding) {
3046 *subframe_len += padding;
3047 memset(skb_put(skb, padding), 0, padding);
3048 }
3049
3050 return true;
3051}
3052
3053static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3054 struct ieee80211_fast_tx *fast_tx,
3055 struct sk_buff *skb)
3056{
3057 struct ieee80211_local *local = sdata->local;
3058 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3059 struct ieee80211_hdr *hdr;
3060 struct ethhdr amsdu_hdr;
3061 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3062 int subframe_len = skb->len - hdr_len;
3063 void *data;
3064 u8 *qc;
3065
3066 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3067 return false;
3068
3069 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3070 return true;
3071
3072 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(amsdu_hdr),
3073 &subframe_len))
3074 return false;
3075
3076 amsdu_hdr.h_proto = cpu_to_be16(subframe_len);
3077 memcpy(amsdu_hdr.h_source, skb->data + fast_tx->sa_offs, ETH_ALEN);
3078 memcpy(amsdu_hdr.h_dest, skb->data + fast_tx->da_offs, ETH_ALEN);
3079
3080 data = skb_push(skb, sizeof(amsdu_hdr));
3081 memmove(data, data + sizeof(amsdu_hdr), hdr_len);
3082 memcpy(data + hdr_len, &amsdu_hdr, sizeof(amsdu_hdr));
3083
3084 hdr = data;
3085 qc = ieee80211_get_qos_ctl(hdr);
3086 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3087
3088 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3089
3090 return true;
3091}
3092
3093static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3094 struct sta_info *sta,
3095 struct ieee80211_fast_tx *fast_tx,
3096 struct sk_buff *skb)
3097{
3098 struct ieee80211_local *local = sdata->local;
3099 struct fq *fq = &local->fq;
3100 struct fq_tin *tin;
3101 struct fq_flow *flow;
3102 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3103 struct ieee80211_txq *txq = sta->sta.txq[tid];
3104 struct txq_info *txqi;
3105 struct sk_buff **frag_tail, *head;
3106 int subframe_len = skb->len - ETH_ALEN;
3107 u8 max_subframes = sta->sta.max_amsdu_subframes;
3108 int max_frags = local->hw.max_tx_fragments;
3109 int max_amsdu_len = sta->sta.max_amsdu_len;
3110 __be16 len;
3111 void *data;
3112 bool ret = false;
3113 unsigned int orig_len;
3114 int n = 1, nfrags;
3115
3116 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3117 return false;
3118
3119 if (!txq)
3120 return false;
3121
3122 txqi = to_txq_info(txq);
3123 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3124 return false;
3125
3126 if (sta->sta.max_rc_amsdu_len)
3127 max_amsdu_len = min_t(int, max_amsdu_len,
3128 sta->sta.max_rc_amsdu_len);
3129
3130 spin_lock_bh(&fq->lock);
3131
3132
3133
3134
3135
3136 tin = &txqi->tin;
3137 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3138 head = skb_peek_tail(&flow->queue);
3139 if (!head)
3140 goto out;
3141
3142 orig_len = head->len;
3143
3144 if (skb->len + head->len > max_amsdu_len)
3145 goto out;
3146
3147 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3148 goto out;
3149
3150 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3151 nfrags += 1 + skb_shinfo(head)->nr_frags;
3152 frag_tail = &skb_shinfo(head)->frag_list;
3153 while (*frag_tail) {
3154 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3155 frag_tail = &(*frag_tail)->next;
3156 n++;
3157 }
3158
3159 if (max_subframes && n > max_subframes)
3160 goto out;
3161
3162 if (max_frags && nfrags > max_frags)
3163 goto out;
3164
3165 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3166 &subframe_len))
3167 goto out;
3168
3169 ret = true;
3170 data = skb_push(skb, ETH_ALEN + 2);
3171 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3172
3173 data += 2 * ETH_ALEN;
3174 len = cpu_to_be16(subframe_len);
3175 memcpy(data, &len, 2);
3176 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3177
3178 head->len += skb->len;
3179 head->data_len += skb->len;
3180 *frag_tail = skb;
3181
3182 flow->backlog += head->len - orig_len;
3183 tin->backlog_bytes += head->len - orig_len;
3184
3185 fq_recalc_backlog(fq, tin, flow);
3186
3187out:
3188 spin_unlock_bh(&fq->lock);
3189
3190 return ret;
3191}
3192
3193
3194
3195
3196
3197static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3198 struct sta_info *sta, u8 pn_offs,
3199 struct ieee80211_key *key,
3200 struct sk_buff *skb)
3201{
3202 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3203 struct ieee80211_hdr *hdr = (void *)skb->data;
3204 u8 tid = IEEE80211_NUM_TIDS;
3205
3206 if (key)
3207 info->control.hw_key = &key->conf;
3208
3209 ieee80211_tx_stats(skb->dev, skb->len);
3210
3211 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3212 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3213 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3214 } else {
3215 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3216 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3217 sdata->sequence_number += 0x10;
3218 }
3219
3220 if (skb_shinfo(skb)->gso_size)
3221 sta->tx_stats.msdu[tid] +=
3222 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3223 else
3224 sta->tx_stats.msdu[tid]++;
3225
3226 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3227
3228
3229
3230
3231 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3232 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3233
3234 if (pn_offs) {
3235 u64 pn;
3236 u8 *crypto_hdr = skb->data + pn_offs;
3237
3238 switch (key->conf.cipher) {
3239 case WLAN_CIPHER_SUITE_CCMP:
3240 case WLAN_CIPHER_SUITE_CCMP_256:
3241 case WLAN_CIPHER_SUITE_GCMP:
3242 case WLAN_CIPHER_SUITE_GCMP_256:
3243 pn = atomic64_inc_return(&key->conf.tx_pn);
3244 crypto_hdr[0] = pn;
3245 crypto_hdr[1] = pn >> 8;
3246 crypto_hdr[4] = pn >> 16;
3247 crypto_hdr[5] = pn >> 24;
3248 crypto_hdr[6] = pn >> 32;
3249 crypto_hdr[7] = pn >> 40;
3250 break;
3251 }
3252 }
3253}
3254
3255static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3256 struct sta_info *sta,
3257 struct ieee80211_fast_tx *fast_tx,
3258 struct sk_buff *skb)
3259{
3260 struct ieee80211_local *local = sdata->local;
3261 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3262 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3263 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3264 struct ethhdr eth;
3265 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3266 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3267 struct ieee80211_tx_data tx;
3268 ieee80211_tx_result r;
3269 struct tid_ampdu_tx *tid_tx = NULL;
3270 u8 tid = IEEE80211_NUM_TIDS;
3271
3272
3273 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3274 return false;
3275
3276
3277 if (ethertype < ETH_P_802_3_MIN)
3278 return false;
3279
3280
3281 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3282 return false;
3283
3284 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3285 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3286 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3287 if (tid_tx) {
3288 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3289 return false;
3290 if (tid_tx->timeout)
3291 tid_tx->last_tx = jiffies;
3292 }
3293 }
3294
3295
3296
3297 if (skb_shared(skb)) {
3298 struct sk_buff *tmp_skb = skb;
3299
3300 skb = skb_clone(skb, GFP_ATOMIC);
3301 kfree_skb(tmp_skb);
3302
3303 if (!skb)
3304 return true;
3305 }
3306
3307 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3308 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3309 return true;
3310
3311
3312
3313
3314
3315 if (unlikely(ieee80211_skb_resize(sdata, skb,
3316 max_t(int, extra_head + hw_headroom -
3317 skb_headroom(skb), 0),
3318 false))) {
3319 kfree_skb(skb);
3320 return true;
3321 }
3322
3323 memcpy(ð, skb->data, ETH_HLEN - 2);
3324 hdr = (void *)skb_push(skb, extra_head);
3325 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3326 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3327 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3328
3329 memset(info, 0, sizeof(*info));
3330 info->band = fast_tx->band;
3331 info->control.vif = &sdata->vif;
3332 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3333 IEEE80211_TX_CTL_DONTFRAG |
3334 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3335 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
3336
3337 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3338 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3339 *ieee80211_get_qos_ctl(hdr) = tid;
3340 }
3341
3342 __skb_queue_head_init(&tx.skbs);
3343
3344 tx.flags = IEEE80211_TX_UNICAST;
3345 tx.local = local;
3346 tx.sdata = sdata;
3347 tx.sta = sta;
3348 tx.key = fast_tx->key;
3349
3350 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3351 tx.skb = skb;
3352 r = ieee80211_tx_h_rate_ctrl(&tx);
3353 skb = tx.skb;
3354 tx.skb = NULL;
3355
3356 if (r != TX_CONTINUE) {
3357 if (r != TX_QUEUED)
3358 kfree_skb(skb);
3359 return true;
3360 }
3361 }
3362
3363 if (ieee80211_queue_skb(local, sdata, sta, skb))
3364 return true;
3365
3366 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3367 fast_tx->key, skb);
3368
3369 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3370 sdata = container_of(sdata->bss,
3371 struct ieee80211_sub_if_data, u.ap);
3372
3373 __skb_queue_tail(&tx.skbs, skb);
3374 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3375 return true;
3376}
3377
3378struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3379 struct ieee80211_txq *txq)
3380{
3381 struct ieee80211_local *local = hw_to_local(hw);
3382 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3383 struct ieee80211_hdr *hdr;
3384 struct sk_buff *skb = NULL;
3385 struct fq *fq = &local->fq;
3386 struct fq_tin *tin = &txqi->tin;
3387 struct ieee80211_tx_info *info;
3388 struct ieee80211_tx_data tx;
3389 ieee80211_tx_result r;
3390
3391 spin_lock_bh(&fq->lock);
3392
3393 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
3394 goto out;
3395
3396
3397 skb = __skb_dequeue(&txqi->frags);
3398 if (skb)
3399 goto out;
3400
3401begin:
3402 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3403 if (!skb)
3404 goto out;
3405
3406 ieee80211_set_skb_vif(skb, txqi);
3407
3408 hdr = (struct ieee80211_hdr *)skb->data;
3409 info = IEEE80211_SKB_CB(skb);
3410
3411 memset(&tx, 0, sizeof(tx));
3412 __skb_queue_head_init(&tx.skbs);
3413 tx.local = local;
3414 tx.skb = skb;
3415 tx.sdata = vif_to_sdata(info->control.vif);
3416
3417 if (txq->sta)
3418 tx.sta = container_of(txq->sta, struct sta_info, sta);
3419
3420
3421
3422
3423
3424 r = ieee80211_tx_h_select_key(&tx);
3425 if (r != TX_CONTINUE) {
3426 ieee80211_free_txskb(&local->hw, skb);
3427 goto begin;
3428 }
3429
3430 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3431 info->flags |= IEEE80211_TX_CTL_AMPDU;
3432 else
3433 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3434
3435 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3436 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3437 sta);
3438 u8 pn_offs = 0;
3439
3440 if (tx.key &&
3441 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3442 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3443
3444 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3445 tx.key, skb);
3446 } else {
3447 if (invoke_tx_handlers_late(&tx))
3448 goto begin;
3449
3450 skb = __skb_dequeue(&tx.skbs);
3451
3452 if (!skb_queue_empty(&tx.skbs))
3453 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
3454 }
3455
3456 if (skb && skb_has_frag_list(skb) &&
3457 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3458 if (skb_linearize(skb)) {
3459 ieee80211_free_txskb(&local->hw, skb);
3460 goto begin;
3461 }
3462 }
3463
3464out:
3465 spin_unlock_bh(&fq->lock);
3466
3467 return skb;
3468}
3469EXPORT_SYMBOL(ieee80211_tx_dequeue);
3470
3471void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3472 struct net_device *dev,
3473 u32 info_flags)
3474{
3475 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3476 struct sta_info *sta;
3477 struct sk_buff *next;
3478
3479 if (unlikely(skb->len < ETH_HLEN)) {
3480 kfree_skb(skb);
3481 return;
3482 }
3483
3484 rcu_read_lock();
3485
3486 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3487 goto out_free;
3488
3489 if (!IS_ERR_OR_NULL(sta)) {
3490 struct ieee80211_fast_tx *fast_tx;
3491
3492 fast_tx = rcu_dereference(sta->fast_tx);
3493
3494 if (fast_tx &&
3495 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
3496 goto out;
3497 }
3498
3499 if (skb_is_gso(skb)) {
3500 struct sk_buff *segs;
3501
3502 segs = skb_gso_segment(skb, 0);
3503 if (IS_ERR(segs)) {
3504 goto out_free;
3505 } else if (segs) {
3506 consume_skb(skb);
3507 skb = segs;
3508 }
3509 } else {
3510
3511 if (skb_linearize(skb)) {
3512 kfree_skb(skb);
3513 goto out;
3514 }
3515
3516
3517
3518
3519
3520 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3521 skb_set_transport_header(skb,
3522 skb_checksum_start_offset(skb));
3523 if (skb_checksum_help(skb))
3524 goto out_free;
3525 }
3526 }
3527
3528 next = skb;
3529 while (next) {
3530 skb = next;
3531 next = skb->next;
3532
3533 skb->prev = NULL;
3534 skb->next = NULL;
3535
3536 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3537 if (IS_ERR(skb))
3538 goto out;
3539
3540 ieee80211_tx_stats(dev, skb->len);
3541
3542 ieee80211_xmit(sdata, sta, skb);
3543 }
3544 goto out;
3545 out_free:
3546 kfree_skb(skb);
3547 out:
3548 rcu_read_unlock();
3549}
3550
3551
3552
3553
3554
3555
3556
3557
3558netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3559 struct net_device *dev)
3560{
3561 __ieee80211_subif_start_xmit(skb, dev, 0);
3562 return NETDEV_TX_OK;
3563}
3564
3565struct sk_buff *
3566ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3567 struct sk_buff *skb, u32 info_flags)
3568{
3569 struct ieee80211_hdr *hdr;
3570 struct ieee80211_tx_data tx = {
3571 .local = sdata->local,
3572 .sdata = sdata,
3573 };
3574 struct sta_info *sta;
3575
3576 rcu_read_lock();
3577
3578 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3579 kfree_skb(skb);
3580 skb = ERR_PTR(-EINVAL);
3581 goto out;
3582 }
3583
3584 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3585 if (IS_ERR(skb))
3586 goto out;
3587
3588 hdr = (void *)skb->data;
3589 tx.sta = sta_info_get(sdata, hdr->addr1);
3590 tx.skb = skb;
3591
3592 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3593 rcu_read_unlock();
3594 kfree_skb(skb);
3595 return ERR_PTR(-EINVAL);
3596 }
3597
3598out:
3599 rcu_read_unlock();
3600 return skb;
3601}
3602
3603
3604
3605
3606
3607void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3608{
3609 struct sk_buff *skb;
3610 int i;
3611
3612 for (i = 0; i < local->hw.queues; i++) {
3613 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3614 ieee80211_free_txskb(&local->hw, skb);
3615 }
3616}
3617
3618
3619
3620
3621
3622
3623static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3624 struct sk_buff *skb)
3625{
3626 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3627 struct ieee80211_sub_if_data *sdata;
3628 struct sta_info *sta;
3629 struct ieee80211_hdr *hdr;
3630 bool result;
3631 struct ieee80211_chanctx_conf *chanctx_conf;
3632
3633 sdata = vif_to_sdata(info->control.vif);
3634
3635 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
3636 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3637 if (unlikely(!chanctx_conf)) {
3638 dev_kfree_skb(skb);
3639 return true;
3640 }
3641 info->band = chanctx_conf->def.chan->band;
3642 result = ieee80211_tx(sdata, NULL, skb, true);
3643 } else {
3644 struct sk_buff_head skbs;
3645
3646 __skb_queue_head_init(&skbs);
3647 __skb_queue_tail(&skbs, skb);
3648
3649 hdr = (struct ieee80211_hdr *)skb->data;
3650 sta = sta_info_get(sdata, hdr->addr1);
3651
3652 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
3653 }
3654
3655 return result;
3656}
3657
3658
3659
3660
3661void ieee80211_tx_pending(unsigned long data)
3662{
3663 struct ieee80211_local *local = (struct ieee80211_local *)data;
3664 unsigned long flags;
3665 int i;
3666 bool txok;
3667
3668 rcu_read_lock();
3669
3670 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3671 for (i = 0; i < local->hw.queues; i++) {
3672
3673
3674
3675
3676 if (local->queue_stop_reasons[i] ||
3677 skb_queue_empty(&local->pending[i]))
3678 continue;
3679
3680 while (!skb_queue_empty(&local->pending[i])) {
3681 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
3682 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3683
3684 if (WARN_ON(!info->control.vif)) {
3685 ieee80211_free_txskb(&local->hw, skb);
3686 continue;
3687 }
3688
3689 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3690 flags);
3691
3692 txok = ieee80211_tx_pending_skb(local, skb);
3693 spin_lock_irqsave(&local->queue_stop_reason_lock,
3694 flags);
3695 if (!txok)
3696 break;
3697 }
3698
3699 if (skb_queue_empty(&local->pending[i]))
3700 ieee80211_propagate_queue_wake(local, i);
3701 }
3702 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
3703
3704 rcu_read_unlock();
3705}
3706
3707
3708
3709static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
3710 struct ps_data *ps, struct sk_buff *skb,
3711 bool is_template)
3712{
3713 u8 *pos, *tim;
3714 int aid0 = 0;
3715 int i, have_bits = 0, n1, n2;
3716
3717
3718
3719 if (atomic_read(&ps->num_sta_ps) > 0)
3720
3721
3722 have_bits = !bitmap_empty((unsigned long *)ps->tim,
3723 IEEE80211_MAX_AID+1);
3724 if (!is_template) {
3725 if (ps->dtim_count == 0)
3726 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3727 else
3728 ps->dtim_count--;
3729 }
3730
3731 tim = pos = (u8 *) skb_put(skb, 6);
3732 *pos++ = WLAN_EID_TIM;
3733 *pos++ = 4;
3734 *pos++ = ps->dtim_count;
3735 *pos++ = sdata->vif.bss_conf.dtim_period;
3736
3737 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
3738 aid0 = 1;
3739
3740 ps->dtim_bc_mc = aid0 == 1;
3741
3742 if (have_bits) {
3743
3744
3745
3746 n1 = 0;
3747 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
3748 if (ps->tim[i]) {
3749 n1 = i & 0xfe;
3750 break;
3751 }
3752 }
3753 n2 = n1;
3754 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
3755 if (ps->tim[i]) {
3756 n2 = i;
3757 break;
3758 }
3759 }
3760
3761
3762 *pos++ = n1 | aid0;
3763
3764 skb_put(skb, n2 - n1);
3765 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
3766
3767 tim[1] = n2 - n1 + 4;
3768 } else {
3769 *pos++ = aid0;
3770 *pos++ = 0;
3771 }
3772}
3773
3774static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
3775 struct ps_data *ps, struct sk_buff *skb,
3776 bool is_template)
3777{
3778 struct ieee80211_local *local = sdata->local;
3779
3780
3781
3782
3783
3784
3785
3786
3787 if (local->tim_in_locked_section) {
3788 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
3789 } else {
3790 spin_lock_bh(&local->tim_lock);
3791 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
3792 spin_unlock_bh(&local->tim_lock);
3793 }
3794
3795 return 0;
3796}
3797
3798static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
3799 struct beacon_data *beacon)
3800{
3801 struct probe_resp *resp;
3802 u8 *beacon_data;
3803 size_t beacon_data_len;
3804 int i;
3805 u8 count = beacon->csa_current_counter;
3806
3807 switch (sdata->vif.type) {
3808 case NL80211_IFTYPE_AP:
3809 beacon_data = beacon->tail;
3810 beacon_data_len = beacon->tail_len;
3811 break;
3812 case NL80211_IFTYPE_ADHOC:
3813 beacon_data = beacon->head;
3814 beacon_data_len = beacon->head_len;
3815 break;
3816 case NL80211_IFTYPE_MESH_POINT:
3817 beacon_data = beacon->head;
3818 beacon_data_len = beacon->head_len;
3819 break;
3820 default:
3821 return;
3822 }
3823
3824 rcu_read_lock();
3825 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
3826 resp = rcu_dereference(sdata->u.ap.probe_resp);
3827
3828 if (beacon->csa_counter_offsets[i]) {
3829 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
3830 beacon_data_len)) {
3831 rcu_read_unlock();
3832 return;
3833 }
3834
3835 beacon_data[beacon->csa_counter_offsets[i]] = count;
3836 }
3837
3838 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
3839 resp->data[resp->csa_counter_offsets[i]] = count;
3840 }
3841 rcu_read_unlock();
3842}
3843
3844static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
3845{
3846 beacon->csa_current_counter--;
3847
3848
3849 WARN_ON_ONCE(!beacon->csa_current_counter);
3850
3851 return beacon->csa_current_counter;
3852}
3853
3854u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
3855{
3856 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3857 struct beacon_data *beacon = NULL;
3858 u8 count = 0;
3859
3860 rcu_read_lock();
3861
3862 if (sdata->vif.type == NL80211_IFTYPE_AP)
3863 beacon = rcu_dereference(sdata->u.ap.beacon);
3864 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3865 beacon = rcu_dereference(sdata->u.ibss.presp);
3866 else if (ieee80211_vif_is_mesh(&sdata->vif))
3867 beacon = rcu_dereference(sdata->u.mesh.beacon);
3868
3869 if (!beacon)
3870 goto unlock;
3871
3872 count = __ieee80211_csa_update_counter(beacon);
3873
3874unlock:
3875 rcu_read_unlock();
3876 return count;
3877}
3878EXPORT_SYMBOL(ieee80211_csa_update_counter);
3879
3880bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
3881{
3882 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3883 struct beacon_data *beacon = NULL;
3884 u8 *beacon_data;
3885 size_t beacon_data_len;
3886 int ret = false;
3887
3888 if (!ieee80211_sdata_running(sdata))
3889 return false;
3890
3891 rcu_read_lock();
3892 if (vif->type == NL80211_IFTYPE_AP) {
3893 struct ieee80211_if_ap *ap = &sdata->u.ap;
3894
3895 beacon = rcu_dereference(ap->beacon);
3896 if (WARN_ON(!beacon || !beacon->tail))
3897 goto out;
3898 beacon_data = beacon->tail;
3899 beacon_data_len = beacon->tail_len;
3900 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
3901 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3902
3903 beacon = rcu_dereference(ifibss->presp);
3904 if (!beacon)
3905 goto out;
3906
3907 beacon_data = beacon->head;
3908 beacon_data_len = beacon->head_len;
3909 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
3910 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3911
3912 beacon = rcu_dereference(ifmsh->beacon);
3913 if (!beacon)
3914 goto out;
3915
3916 beacon_data = beacon->head;
3917 beacon_data_len = beacon->head_len;
3918 } else {
3919 WARN_ON(1);
3920 goto out;
3921 }
3922
3923 if (!beacon->csa_counter_offsets[0])
3924 goto out;
3925
3926 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
3927 goto out;
3928
3929 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
3930 ret = true;
3931 out:
3932 rcu_read_unlock();
3933
3934 return ret;
3935}
3936EXPORT_SYMBOL(ieee80211_csa_is_complete);
3937
3938static struct sk_buff *
3939__ieee80211_beacon_get(struct ieee80211_hw *hw,
3940 struct ieee80211_vif *vif,
3941 struct ieee80211_mutable_offsets *offs,
3942 bool is_template)
3943{
3944 struct ieee80211_local *local = hw_to_local(hw);
3945 struct beacon_data *beacon = NULL;
3946 struct sk_buff *skb = NULL;
3947 struct ieee80211_tx_info *info;
3948 struct ieee80211_sub_if_data *sdata = NULL;
3949 enum nl80211_band band;
3950 struct ieee80211_tx_rate_control txrc;
3951 struct ieee80211_chanctx_conf *chanctx_conf;
3952 int csa_off_base = 0;
3953
3954 rcu_read_lock();
3955
3956 sdata = vif_to_sdata(vif);
3957 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3958
3959 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
3960 goto out;
3961
3962 if (offs)
3963 memset(offs, 0, sizeof(*offs));
3964
3965 if (sdata->vif.type == NL80211_IFTYPE_AP) {
3966 struct ieee80211_if_ap *ap = &sdata->u.ap;
3967
3968 beacon = rcu_dereference(ap->beacon);
3969 if (beacon) {
3970 if (beacon->csa_counter_offsets[0]) {
3971 if (!is_template)
3972 __ieee80211_csa_update_counter(beacon);
3973
3974 ieee80211_set_csa(sdata, beacon);
3975 }
3976
3977
3978
3979
3980
3981 skb = dev_alloc_skb(local->tx_headroom +
3982 beacon->head_len +
3983 beacon->tail_len + 256 +
3984 local->hw.extra_beacon_tailroom);
3985 if (!skb)
3986 goto out;
3987
3988 skb_reserve(skb, local->tx_headroom);
3989 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3990 beacon->head_len);
3991
3992 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
3993 is_template);
3994
3995 if (offs) {
3996 offs->tim_offset = beacon->head_len;
3997 offs->tim_length = skb->len - beacon->head_len;
3998
3999
4000 csa_off_base = skb->len;
4001 }
4002
4003 if (beacon->tail)
4004 memcpy(skb_put(skb, beacon->tail_len),
4005 beacon->tail, beacon->tail_len);
4006 } else
4007 goto out;
4008 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
4009 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4010 struct ieee80211_hdr *hdr;
4011
4012 beacon = rcu_dereference(ifibss->presp);
4013 if (!beacon)
4014 goto out;
4015
4016 if (beacon->csa_counter_offsets[0]) {
4017 if (!is_template)
4018 __ieee80211_csa_update_counter(beacon);
4019
4020 ieee80211_set_csa(sdata, beacon);
4021 }
4022
4023 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
4024 local->hw.extra_beacon_tailroom);
4025 if (!skb)
4026 goto out;
4027 skb_reserve(skb, local->tx_headroom);
4028 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4029 beacon->head_len);
4030
4031 hdr = (struct ieee80211_hdr *) skb->data;
4032 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4033 IEEE80211_STYPE_BEACON);
4034 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4035 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4036
4037 beacon = rcu_dereference(ifmsh->beacon);
4038 if (!beacon)
4039 goto out;
4040
4041 if (beacon->csa_counter_offsets[0]) {
4042 if (!is_template)
4043
4044
4045
4046
4047
4048 __ieee80211_csa_update_counter(beacon);
4049
4050 ieee80211_set_csa(sdata, beacon);
4051 }
4052
4053 if (ifmsh->sync_ops)
4054 ifmsh->sync_ops->adjust_tbtt(sdata, beacon);
4055
4056 skb = dev_alloc_skb(local->tx_headroom +
4057 beacon->head_len +
4058 256 +
4059 beacon->tail_len +
4060 local->hw.extra_beacon_tailroom);
4061 if (!skb)
4062 goto out;
4063 skb_reserve(skb, local->tx_headroom);
4064 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4065 beacon->head_len);
4066 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4067
4068 if (offs) {
4069 offs->tim_offset = beacon->head_len;
4070 offs->tim_length = skb->len - beacon->head_len;
4071 }
4072
4073 memcpy(skb_put(skb, beacon->tail_len), beacon->tail,
4074 beacon->tail_len);
4075 } else {
4076 WARN_ON(1);
4077 goto out;
4078 }
4079
4080
4081 if (offs && beacon) {
4082 int i;
4083
4084 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
4085 u16 csa_off = beacon->csa_counter_offsets[i];
4086
4087 if (!csa_off)
4088 continue;
4089
4090 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4091 }
4092 }
4093
4094 band = chanctx_conf->def.chan->band;
4095
4096 info = IEEE80211_SKB_CB(skb);
4097
4098 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
4099 info->flags |= IEEE80211_TX_CTL_NO_ACK;
4100 info->band = band;
4101
4102 memset(&txrc, 0, sizeof(txrc));
4103 txrc.hw = hw;
4104 txrc.sband = local->hw.wiphy->bands[band];
4105 txrc.bss_conf = &sdata->vif.bss_conf;
4106 txrc.skb = skb;
4107 txrc.reported_rate.idx = -1;
4108 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
4109 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
4110 txrc.max_rate_idx = -1;
4111 else
4112 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
4113 txrc.bss = true;
4114 rate_control_get_rate(sdata, NULL, &txrc);
4115
4116 info->control.vif = vif;
4117
4118 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4119 IEEE80211_TX_CTL_ASSIGN_SEQ |
4120 IEEE80211_TX_CTL_FIRST_FRAGMENT;
4121 out:
4122 rcu_read_unlock();
4123 return skb;
4124
4125}
4126
4127struct sk_buff *
4128ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4129 struct ieee80211_vif *vif,
4130 struct ieee80211_mutable_offsets *offs)
4131{
4132 return __ieee80211_beacon_get(hw, vif, offs, true);
4133}
4134EXPORT_SYMBOL(ieee80211_beacon_get_template);
4135
4136struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4137 struct ieee80211_vif *vif,
4138 u16 *tim_offset, u16 *tim_length)
4139{
4140 struct ieee80211_mutable_offsets offs = {};
4141 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
4142 struct sk_buff *copy;
4143 struct ieee80211_supported_band *sband;
4144 int shift;
4145
4146 if (!bcn)
4147 return bcn;
4148
4149 if (tim_offset)
4150 *tim_offset = offs.tim_offset;
4151
4152 if (tim_length)
4153 *tim_length = offs.tim_length;
4154
4155 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4156 !hw_to_local(hw)->monitors)
4157 return bcn;
4158
4159
4160 copy = skb_copy(bcn, GFP_ATOMIC);
4161 if (!copy)
4162 return bcn;
4163
4164 shift = ieee80211_vif_get_shift(vif);
4165 sband = hw->wiphy->bands[ieee80211_get_sdata_band(vif_to_sdata(vif))];
4166 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4167
4168 return bcn;
4169}
4170EXPORT_SYMBOL(ieee80211_beacon_get_tim);
4171
4172struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4173 struct ieee80211_vif *vif)
4174{
4175 struct ieee80211_if_ap *ap = NULL;
4176 struct sk_buff *skb = NULL;
4177 struct probe_resp *presp = NULL;
4178 struct ieee80211_hdr *hdr;
4179 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4180
4181 if (sdata->vif.type != NL80211_IFTYPE_AP)
4182 return NULL;
4183
4184 rcu_read_lock();
4185
4186 ap = &sdata->u.ap;
4187 presp = rcu_dereference(ap->probe_resp);
4188 if (!presp)
4189 goto out;
4190
4191 skb = dev_alloc_skb(presp->len);
4192 if (!skb)
4193 goto out;
4194
4195 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
4196
4197 hdr = (struct ieee80211_hdr *) skb->data;
4198 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4199
4200out:
4201 rcu_read_unlock();
4202 return skb;
4203}
4204EXPORT_SYMBOL(ieee80211_proberesp_get);
4205
4206struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4207 struct ieee80211_vif *vif)
4208{
4209 struct ieee80211_sub_if_data *sdata;
4210 struct ieee80211_if_managed *ifmgd;
4211 struct ieee80211_pspoll *pspoll;
4212 struct ieee80211_local *local;
4213 struct sk_buff *skb;
4214
4215 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4216 return NULL;
4217
4218 sdata = vif_to_sdata(vif);
4219 ifmgd = &sdata->u.mgd;
4220 local = sdata->local;
4221
4222 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
4223 if (!skb)
4224 return NULL;
4225
4226 skb_reserve(skb, local->hw.extra_tx_headroom);
4227
4228 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
4229 memset(pspoll, 0, sizeof(*pspoll));
4230 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4231 IEEE80211_STYPE_PSPOLL);
4232 pspoll->aid = cpu_to_le16(ifmgd->aid);
4233
4234
4235 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4236
4237 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4238 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4239
4240 return skb;
4241}
4242EXPORT_SYMBOL(ieee80211_pspoll_get);
4243
4244struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4245 struct ieee80211_vif *vif)
4246{
4247 struct ieee80211_hdr_3addr *nullfunc;
4248 struct ieee80211_sub_if_data *sdata;
4249 struct ieee80211_if_managed *ifmgd;
4250 struct ieee80211_local *local;
4251 struct sk_buff *skb;
4252
4253 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4254 return NULL;
4255
4256 sdata = vif_to_sdata(vif);
4257 ifmgd = &sdata->u.mgd;
4258 local = sdata->local;
4259
4260 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
4261 if (!skb)
4262 return NULL;
4263
4264 skb_reserve(skb, local->hw.extra_tx_headroom);
4265
4266 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
4267 sizeof(*nullfunc));
4268 memset(nullfunc, 0, sizeof(*nullfunc));
4269 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4270 IEEE80211_STYPE_NULLFUNC |
4271 IEEE80211_FCTL_TODS);
4272 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4273 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4274 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4275
4276 return skb;
4277}
4278EXPORT_SYMBOL(ieee80211_nullfunc_get);
4279
4280struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
4281 const u8 *src_addr,
4282 const u8 *ssid, size_t ssid_len,
4283 size_t tailroom)
4284{
4285 struct ieee80211_local *local = hw_to_local(hw);
4286 struct ieee80211_hdr_3addr *hdr;
4287 struct sk_buff *skb;
4288 size_t ie_ssid_len;
4289 u8 *pos;
4290
4291 ie_ssid_len = 2 + ssid_len;
4292
4293 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
4294 ie_ssid_len + tailroom);
4295 if (!skb)
4296 return NULL;
4297
4298 skb_reserve(skb, local->hw.extra_tx_headroom);
4299
4300 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
4301 memset(hdr, 0, sizeof(*hdr));
4302 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4303 IEEE80211_STYPE_PROBE_REQ);
4304 eth_broadcast_addr(hdr->addr1);
4305 memcpy(hdr->addr2, src_addr, ETH_ALEN);
4306 eth_broadcast_addr(hdr->addr3);
4307
4308 pos = skb_put(skb, ie_ssid_len);
4309 *pos++ = WLAN_EID_SSID;
4310 *pos++ = ssid_len;
4311 if (ssid_len)
4312 memcpy(pos, ssid, ssid_len);
4313 pos += ssid_len;
4314
4315 return skb;
4316}
4317EXPORT_SYMBOL(ieee80211_probereq_get);
4318
4319void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4320 const void *frame, size_t frame_len,
4321 const struct ieee80211_tx_info *frame_txctl,
4322 struct ieee80211_rts *rts)
4323{
4324 const struct ieee80211_hdr *hdr = frame;
4325
4326 rts->frame_control =
4327 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
4328 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4329 frame_txctl);
4330 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4331 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4332}
4333EXPORT_SYMBOL(ieee80211_rts_get);
4334
4335void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4336 const void *frame, size_t frame_len,
4337 const struct ieee80211_tx_info *frame_txctl,
4338 struct ieee80211_cts *cts)
4339{
4340 const struct ieee80211_hdr *hdr = frame;
4341
4342 cts->frame_control =
4343 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
4344 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4345 frame_len, frame_txctl);
4346 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4347}
4348EXPORT_SYMBOL(ieee80211_ctstoself_get);
4349
4350struct sk_buff *
4351ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
4352 struct ieee80211_vif *vif)
4353{
4354 struct ieee80211_local *local = hw_to_local(hw);
4355 struct sk_buff *skb = NULL;
4356 struct ieee80211_tx_data tx;
4357 struct ieee80211_sub_if_data *sdata;
4358 struct ps_data *ps;
4359 struct ieee80211_tx_info *info;
4360 struct ieee80211_chanctx_conf *chanctx_conf;
4361
4362 sdata = vif_to_sdata(vif);
4363
4364 rcu_read_lock();
4365 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4366
4367 if (!chanctx_conf)
4368 goto out;
4369
4370 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4371 struct beacon_data *beacon =
4372 rcu_dereference(sdata->u.ap.beacon);
4373
4374 if (!beacon || !beacon->head)
4375 goto out;
4376
4377 ps = &sdata->u.ap.ps;
4378 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4379 ps = &sdata->u.mesh.ps;
4380 } else {
4381 goto out;
4382 }
4383
4384 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
4385 goto out;
4386
4387 while (1) {
4388 skb = skb_dequeue(&ps->bc_buf);
4389 if (!skb)
4390 goto out;
4391 local->total_ps_buffered--;
4392
4393 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
4394 struct ieee80211_hdr *hdr =
4395 (struct ieee80211_hdr *) skb->data;
4396
4397
4398
4399 hdr->frame_control |=
4400 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4401 }
4402
4403 if (sdata->vif.type == NL80211_IFTYPE_AP)
4404 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
4405 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
4406 break;
4407 ieee80211_free_txskb(hw, skb);
4408 }
4409
4410 info = IEEE80211_SKB_CB(skb);
4411
4412 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4413 info->band = chanctx_conf->def.chan->band;
4414
4415 if (invoke_tx_handlers(&tx))
4416 skb = NULL;
4417 out:
4418 rcu_read_unlock();
4419
4420 return skb;
4421}
4422EXPORT_SYMBOL(ieee80211_get_buffered_bc);
4423
4424int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4425{
4426 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4427 struct ieee80211_sub_if_data *sdata = sta->sdata;
4428 struct ieee80211_local *local = sdata->local;
4429 int ret;
4430 u32 queues;
4431
4432 lockdep_assert_held(&local->sta_mtx);
4433
4434
4435 switch (sdata->vif.type) {
4436 case NL80211_IFTYPE_STATION:
4437 case NL80211_IFTYPE_AP:
4438 case NL80211_IFTYPE_AP_VLAN:
4439 break;
4440 default:
4441 WARN_ON(1);
4442 return -EINVAL;
4443 }
4444
4445 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4446 return -EINVAL;
4447
4448 if (sta->reserved_tid == tid) {
4449 ret = 0;
4450 goto out;
4451 }
4452
4453 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4454 sdata_err(sdata, "TID reservation already active\n");
4455 ret = -EALREADY;
4456 goto out;
4457 }
4458
4459 ieee80211_stop_vif_queues(sdata->local, sdata,
4460 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4461
4462 synchronize_net();
4463
4464
4465 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
4466 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4467 __ieee80211_stop_tx_ba_session(sta, tid,
4468 AGG_STOP_LOCAL_REQUEST);
4469 }
4470
4471 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
4472 __ieee80211_flush_queues(local, sdata, queues, false);
4473
4474 sta->reserved_tid = tid;
4475
4476 ieee80211_wake_vif_queues(local, sdata,
4477 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4478
4479 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
4480 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4481
4482 ret = 0;
4483 out:
4484 return ret;
4485}
4486EXPORT_SYMBOL(ieee80211_reserve_tid);
4487
4488void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4489{
4490 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4491 struct ieee80211_sub_if_data *sdata = sta->sdata;
4492
4493 lockdep_assert_held(&sdata->local->sta_mtx);
4494
4495
4496 switch (sdata->vif.type) {
4497 case NL80211_IFTYPE_STATION:
4498 case NL80211_IFTYPE_AP:
4499 case NL80211_IFTYPE_AP_VLAN:
4500 break;
4501 default:
4502 WARN_ON(1);
4503 return;
4504 }
4505
4506 if (tid != sta->reserved_tid) {
4507 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4508 return;
4509 }
4510
4511 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4512}
4513EXPORT_SYMBOL(ieee80211_unreserve_tid);
4514
4515void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4516 struct sk_buff *skb, int tid,
4517 enum nl80211_band band)
4518{
4519 int ac = ieee802_1d_to_ac[tid & 7];
4520
4521 skb_reset_mac_header(skb);
4522 skb_set_queue_mapping(skb, ac);
4523 skb->priority = tid;
4524
4525 skb->dev = sdata->dev;
4526
4527
4528
4529
4530
4531
4532 local_bh_disable();
4533 IEEE80211_SKB_CB(skb)->band = band;
4534 ieee80211_xmit(sdata, NULL, skb);
4535 local_bh_enable();
4536}
4537