1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2018-2021 Intel Corporation
10 * Transmit and frame generation functions.
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/skbuff.h>
16 #include <linux/if_vlan.h>
17 #include <linux/etherdevice.h>
18 #include <linux/bitmap.h>
19 #include <linux/rcupdate.h>
20 #include <linux/export.h>
21 #include <linux/timekeeping.h>
22 #include <net/net_namespace.h>
23 #include <net/ieee80211_radiotap.h>
24 #include <net/cfg80211.h>
25 #include <net/mac80211.h>
26 #include <net/codel.h>
27 #include <net/codel_impl.h>
28 #include <asm/unaligned.h>
29 #include <net/fq_impl.h>
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
42 static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
43 struct sk_buff *skb, int group_addr,
46 int rate, mrate, erp, dur, i, shift = 0;
47 struct ieee80211_rate *txrate;
48 struct ieee80211_local *local = tx->local;
49 struct ieee80211_supported_band *sband;
50 struct ieee80211_hdr *hdr;
51 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
52 struct ieee80211_chanctx_conf *chanctx_conf;
55 /* assume HW handles this */
56 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
60 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
62 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
63 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
68 if (WARN_ON_ONCE(tx->rate.idx < 0))
71 sband = local->hw.wiphy->bands[info->band];
72 txrate = &sband->bitrates[tx->rate.idx];
74 erp = txrate->flags & IEEE80211_RATE_ERP_G;
76 /* device is expected to do this */
77 if (sband->band == NL80211_BAND_S1GHZ)
81 * data and mgmt (except PS Poll):
83 * - during contention period:
84 * if addr1 is group address: 0
85 * if more fragments = 0 and addr1 is individual address: time to
86 * transmit one ACK plus SIFS
87 * if more fragments = 1 and addr1 is individual address: time to
88 * transmit next fragment plus 2 x ACK plus 3 x SIFS
91 * - control response frame (CTS or ACK) shall be transmitted using the
92 * same rate as the immediately previous frame in the frame exchange
93 * sequence, if this rate belongs to the PHY mandatory rates, or else
94 * at the highest possible rate belonging to the PHY rates in the
97 hdr = (struct ieee80211_hdr *)skb->data;
98 if (ieee80211_is_ctl(hdr->frame_control)) {
99 /* TODO: These control frames are not currently sent by
100 * mac80211, but should they be implemented, this function
101 * needs to be updated to support duration field calculation.
103 * RTS: time needed to transmit pending data/mgmt frame plus
104 * one CTS frame plus one ACK frame plus 3 x SIFS
105 * CTS: duration of immediately previous RTS minus time
106 * required to transmit CTS and its SIFS
107 * ACK: 0 if immediately previous directed data/mgmt had
108 * more=0, with more=1 duration in ACK frame is duration
109 * from previous frame minus time needed to transmit ACK
111 * PS Poll: BIT(15) | BIT(14) | aid
117 if (0 /* FIX: data/mgmt during CFP */)
118 return cpu_to_le16(32768);
120 if (group_addr) /* Group address as the destination - no ACK */
123 /* Individual destination address:
124 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
125 * CTS and ACK frames shall be transmitted using the highest rate in
126 * basic rate set that is less than or equal to the rate of the
127 * immediately previous frame and that is using the same modulation
128 * (CCK or OFDM). If no basic rate set matches with these requirements,
129 * the highest mandatory rate of the PHY that is less than or equal to
130 * the rate of the previous frame is used.
131 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
134 /* use lowest available if everything fails */
135 mrate = sband->bitrates[0].bitrate;
136 for (i = 0; i < sband->n_bitrates; i++) {
137 struct ieee80211_rate *r = &sband->bitrates[i];
139 if (r->bitrate > txrate->bitrate)
142 if ((rate_flags & r->flags) != rate_flags)
145 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
146 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
148 switch (sband->band) {
149 case NL80211_BAND_2GHZ:
150 case NL80211_BAND_LC: {
152 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
153 flag = IEEE80211_RATE_MANDATORY_G;
155 flag = IEEE80211_RATE_MANDATORY_B;
160 case NL80211_BAND_5GHZ:
161 case NL80211_BAND_6GHZ:
162 if (r->flags & IEEE80211_RATE_MANDATORY_A)
165 case NL80211_BAND_S1GHZ:
166 case NL80211_BAND_60GHZ:
167 /* TODO, for now fall through */
168 case NUM_NL80211_BANDS:
174 /* No matching basic rate found; use highest suitable mandatory
176 rate = DIV_ROUND_UP(mrate, 1 << shift);
179 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
180 if (ieee80211_is_data_qos(hdr->frame_control) &&
181 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
184 /* Time needed to transmit ACK
185 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
186 * to closest integer */
187 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
188 tx->sdata->vif.bss_conf.use_short_preamble,
192 /* Frame is fragmented: duration increases with time needed to
193 * transmit next fragment plus ACK and 2 x SIFS. */
194 dur *= 2; /* ACK + SIFS */
196 dur += ieee80211_frame_duration(sband->band, next_frag_len,
197 txrate->bitrate, erp,
198 tx->sdata->vif.bss_conf.use_short_preamble,
202 return cpu_to_le16(dur);
206 static ieee80211_tx_result debug_noinline
207 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
209 struct ieee80211_local *local = tx->local;
210 struct ieee80211_if_managed *ifmgd;
211 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
213 /* driver doesn't support power save */
214 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
217 /* hardware does dynamic power save */
218 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
221 /* dynamic power save disabled */
222 if (local->hw.conf.dynamic_ps_timeout <= 0)
225 /* we are scanning, don't enable power save */
229 if (!local->ps_sdata)
232 /* No point if we're going to suspend */
233 if (local->quiescing)
236 /* dynamic ps is supported only in managed mode */
237 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
240 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
243 ifmgd = &tx->sdata->u.mgd;
246 * Don't wakeup from power save if u-apsd is enabled, voip ac has
247 * u-apsd enabled and the frame is in voip class. This effectively
248 * means that even if all access categories have u-apsd enabled, in
249 * practise u-apsd is only used with the voip ac. This is a
250 * workaround for the case when received voip class packets do not
251 * have correct qos tag for some reason, due the network or the
254 * Note: ifmgd->uapsd_queues access is racy here. If the value is
255 * changed via debugfs, user needs to reassociate manually to have
256 * everything in sync.
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)
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,
268 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
269 ieee80211_queue_work(&local->hw,
270 &local->dynamic_ps_disable_work);
273 /* Don't restart the timer if we're not disassociated */
274 if (!ifmgd->associated)
277 mod_timer(&local->dynamic_ps_timer, jiffies +
278 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
283 static ieee80211_tx_result debug_noinline
284 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
287 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
288 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
291 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
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_any_nullfunc(hdr->frame_control))
299 * When software scanning only nullfunc frames (to notify
300 * the sleep state to the AP) and probe requests (for the
301 * active scan) are allowed, all other frames should not be
302 * sent and we should not get here, but if we do
303 * nonetheless, drop them to avoid sending them
304 * off-channel. See the link below and
305 * ieee80211_start_scan() for more.
307 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
311 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
314 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
318 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
320 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
321 if (unlikely(!assoc &&
322 ieee80211_is_data(hdr->frame_control))) {
323 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
324 sdata_info(tx->sdata,
325 "dropped data frame to not associated station %pM\n",
328 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
331 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
332 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
334 * No associated STAs - no need to send multicast
343 /* This function is called whenever the AP is about to exceed the maximum limit
344 * of buffered frames for power saving STAs. This situation should not really
345 * happen often during normal operation, so dropping the oldest buffered packet
346 * from each queue should be OK to make some room for new frames. */
347 static void purge_old_ps_buffers(struct ieee80211_local *local)
349 int total = 0, purged = 0;
351 struct ieee80211_sub_if_data *sdata;
352 struct sta_info *sta;
354 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
357 if (sdata->vif.type == NL80211_IFTYPE_AP)
358 ps = &sdata->u.ap.ps;
359 else if (ieee80211_vif_is_mesh(&sdata->vif))
360 ps = &sdata->u.mesh.ps;
364 skb = skb_dequeue(&ps->bc_buf);
367 ieee80211_free_txskb(&local->hw, skb);
369 total += skb_queue_len(&ps->bc_buf);
373 * Drop one frame from each station from the lowest-priority
374 * AC that has frames at all.
376 list_for_each_entry_rcu(sta, &local->sta_list, list) {
379 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
380 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
381 total += skb_queue_len(&sta->ps_tx_buf[ac]);
384 ieee80211_free_txskb(&local->hw, skb);
390 local->total_ps_buffered = total;
391 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
394 static ieee80211_tx_result
395 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
397 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
398 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
402 * broadcast/multicast frame
404 * If any of the associated/peer stations is in power save mode,
405 * the frame is buffered to be sent after DTIM beacon frame.
406 * This is done either by the hardware or us.
409 /* powersaving STAs currently only in AP/VLAN/mesh mode */
410 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
411 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
415 ps = &tx->sdata->bss->ps;
416 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
417 ps = &tx->sdata->u.mesh.ps;
423 /* no buffering for ordered frames */
424 if (ieee80211_has_order(hdr->frame_control))
427 if (ieee80211_is_probe_req(hdr->frame_control))
430 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
431 info->hw_queue = tx->sdata->vif.cab_queue;
433 /* no stations in PS mode and no buffered packets */
434 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
437 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
439 /* device releases frame after DTIM beacon */
440 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
443 /* buffered in mac80211 */
444 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
445 purge_old_ps_buffers(tx->local);
447 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
449 "BC TX buffer full - dropping the oldest frame\n");
450 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
452 tx->local->total_ps_buffered++;
454 skb_queue_tail(&ps->bc_buf, tx->skb);
459 static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
462 if (!ieee80211_is_mgmt(fc))
465 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
468 if (!ieee80211_is_robust_mgmt_frame(skb))
474 static ieee80211_tx_result
475 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
477 struct sta_info *sta = tx->sta;
478 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
479 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
480 struct ieee80211_local *local = tx->local;
485 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
486 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
487 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
488 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
489 int ac = skb_get_queue_mapping(tx->skb);
491 if (ieee80211_is_mgmt(hdr->frame_control) &&
492 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
493 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
497 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
498 sta->sta.addr, sta->sta.aid, ac);
499 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
500 purge_old_ps_buffers(tx->local);
502 /* sync with ieee80211_sta_ps_deliver_wakeup */
503 spin_lock(&sta->ps_lock);
505 * STA woke up the meantime and all the frames on ps_tx_buf have
506 * been queued to pending queue. No reordering can happen, go
507 * ahead and Tx the packet.
509 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
510 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
511 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
512 spin_unlock(&sta->ps_lock);
516 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
517 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
519 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
521 ieee80211_free_txskb(&local->hw, old);
523 tx->local->total_ps_buffered++;
525 info->control.jiffies = jiffies;
526 info->control.vif = &tx->sdata->vif;
527 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
528 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
529 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
530 spin_unlock(&sta->ps_lock);
532 if (!timer_pending(&local->sta_cleanup))
533 mod_timer(&local->sta_cleanup,
534 round_jiffies(jiffies +
535 STA_INFO_CLEANUP_INTERVAL));
538 * We queued up some frames, so the TIM bit might
539 * need to be set, recalculate it.
541 sta_info_recalc_tim(sta);
544 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
546 "STA %pM in PS mode, but polling/in SP -> send frame\n",
553 static ieee80211_tx_result debug_noinline
554 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
556 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
559 if (tx->flags & IEEE80211_TX_UNICAST)
560 return ieee80211_tx_h_unicast_ps_buf(tx);
562 return ieee80211_tx_h_multicast_ps_buf(tx);
565 static ieee80211_tx_result debug_noinline
566 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
568 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
570 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
571 if (tx->sdata->control_port_no_encrypt)
572 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
573 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
574 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
580 static ieee80211_tx_result debug_noinline
581 ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
583 struct ieee80211_key *key;
584 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
585 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
587 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
593 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
595 else if (ieee80211_is_group_privacy_action(tx->skb) &&
596 (key = rcu_dereference(tx->sdata->default_multicast_key)))
598 else if (ieee80211_is_mgmt(hdr->frame_control) &&
599 is_multicast_ether_addr(hdr->addr1) &&
600 ieee80211_is_robust_mgmt_frame(tx->skb) &&
601 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
603 else if (is_multicast_ether_addr(hdr->addr1) &&
604 (key = rcu_dereference(tx->sdata->default_multicast_key)))
606 else if (!is_multicast_ether_addr(hdr->addr1) &&
607 (key = rcu_dereference(tx->sdata->default_unicast_key)))
613 bool skip_hw = false;
615 /* TODO: add threshold stuff again */
617 switch (tx->key->conf.cipher) {
618 case WLAN_CIPHER_SUITE_WEP40:
619 case WLAN_CIPHER_SUITE_WEP104:
620 case WLAN_CIPHER_SUITE_TKIP:
621 if (!ieee80211_is_data_present(hdr->frame_control))
624 case WLAN_CIPHER_SUITE_CCMP:
625 case WLAN_CIPHER_SUITE_CCMP_256:
626 case WLAN_CIPHER_SUITE_GCMP:
627 case WLAN_CIPHER_SUITE_GCMP_256:
628 if (!ieee80211_is_data_present(hdr->frame_control) &&
629 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
631 !ieee80211_is_group_privacy_action(tx->skb))
634 skip_hw = (tx->key->conf.flags &
635 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
636 ieee80211_is_mgmt(hdr->frame_control);
638 case WLAN_CIPHER_SUITE_AES_CMAC:
639 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
640 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
641 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
642 if (!ieee80211_is_mgmt(hdr->frame_control))
647 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
648 !ieee80211_is_deauth(hdr->frame_control)))
651 if (!skip_hw && tx->key &&
652 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
653 info->control.hw_key = &tx->key->conf;
654 } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta &&
655 test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) {
662 static ieee80211_tx_result debug_noinline
663 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
665 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
666 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
667 struct ieee80211_supported_band *sband;
669 struct ieee80211_tx_rate_control txrc;
670 struct ieee80211_sta_rates *ratetbl = NULL;
671 bool encap = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
674 memset(&txrc, 0, sizeof(txrc));
676 sband = tx->local->hw.wiphy->bands[info->band];
678 len = min_t(u32, tx->skb->len + FCS_LEN,
679 tx->local->hw.wiphy->frag_threshold);
681 /* set up the tx rate control struct we give the RC algo */
682 txrc.hw = &tx->local->hw;
684 txrc.bss_conf = &tx->sdata->vif.bss_conf;
686 txrc.reported_rate.idx = -1;
687 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
689 if (tx->sdata->rc_has_mcs_mask[info->band])
690 txrc.rate_idx_mcs_mask =
691 tx->sdata->rc_rateidx_mcs_mask[info->band];
693 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
694 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
695 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
696 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
698 /* set up RTS protection if desired */
699 if (len > tx->local->hw.wiphy->rts_threshold) {
703 info->control.use_rts = txrc.rts;
704 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
707 * Use short preamble if the BSS can handle it, but not for
708 * management frames unless we know the receiver can handle
709 * that -- the management frame might be to a station that
710 * just wants a probe response.
712 if (tx->sdata->vif.bss_conf.use_short_preamble &&
713 (ieee80211_is_tx_data(tx->skb) ||
714 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
715 txrc.short_preamble = true;
717 info->control.short_preamble = txrc.short_preamble;
719 /* don't ask rate control when rate already injected via radiotap */
720 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
724 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
727 * Lets not bother rate control if we're associated and cannot
728 * talk to the sta. This should not happen.
730 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
731 !rate_usable_index_exists(sband, &tx->sta->sta),
732 "%s: Dropped data frame as no usable bitrate found while "
733 "scanning and associated. Target station: "
734 "%pM on %d GHz band\n",
736 encap ? ((struct ethhdr *)hdr)->h_dest : hdr->addr1,
741 * If we're associated with the sta at this point we know we can at
742 * least send the frame at the lowest bit rate.
744 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
746 if (tx->sta && !info->control.skip_table)
747 ratetbl = rcu_dereference(tx->sta->sta.rates);
749 if (unlikely(info->control.rates[0].idx < 0)) {
751 struct ieee80211_tx_rate rate = {
752 .idx = ratetbl->rate[0].idx,
753 .flags = ratetbl->rate[0].flags,
754 .count = ratetbl->rate[0].count
757 if (ratetbl->rate[0].idx < 0)
765 tx->rate = info->control.rates[0];
768 if (txrc.reported_rate.idx < 0) {
769 txrc.reported_rate = tx->rate;
770 if (tx->sta && ieee80211_is_tx_data(tx->skb))
771 tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
773 tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
778 if (unlikely(!info->control.rates[0].count))
779 info->control.rates[0].count = 1;
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;
788 static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
790 u16 *seq = &sta->tid_seq[tid];
791 __le16 ret = cpu_to_le16(*seq);
793 /* Increase the sequence number. */
794 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
799 static ieee80211_tx_result debug_noinline
800 ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
802 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
803 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
807 * Packet injection may want to control the sequence
808 * number, if we have no matching interface then we
809 * neither assign one ourselves nor ask the driver to.
811 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
814 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
817 if (ieee80211_hdrlen(hdr->frame_control) < 24)
820 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
823 if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
827 * Anything but QoS data that has a sequence number field
828 * (is long enough) gets a sequence number from the global
829 * counter. QoS data frames with a multicast destination
830 * also use the global counter (802.11-2012 9.3.2.10).
832 if (!ieee80211_is_data_qos(hdr->frame_control) ||
833 is_multicast_ether_addr(hdr->addr1)) {
834 /* driver should assign sequence number */
835 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
836 /* for pure STA mode without beacons, we can do it */
837 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
838 tx->sdata->sequence_number += 0x10;
840 tx->sta->deflink.tx_stats.msdu[IEEE80211_NUM_TIDS]++;
845 * This should be true for injected/management frames only, for
846 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
847 * above since they are not QoS-data frames.
852 /* include per-STA, per-TID sequence counter */
853 tid = ieee80211_get_tid(hdr);
854 tx->sta->deflink.tx_stats.msdu[tid]++;
856 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
861 static int ieee80211_fragment(struct ieee80211_tx_data *tx,
862 struct sk_buff *skb, int hdrlen,
865 struct ieee80211_local *local = tx->local;
866 struct ieee80211_tx_info *info;
868 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
869 int pos = hdrlen + per_fragm;
870 int rem = skb->len - hdrlen - per_fragm;
872 if (WARN_ON(rem < 0))
875 /* first fragment was already added to queue by caller */
878 int fraglen = per_fragm;
883 tmp = dev_alloc_skb(local->tx_headroom +
885 tx->sdata->encrypt_headroom +
886 IEEE80211_ENCRYPT_TAILROOM);
890 __skb_queue_tail(&tx->skbs, tmp);
893 local->tx_headroom + tx->sdata->encrypt_headroom);
895 /* copy control information */
896 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
898 info = IEEE80211_SKB_CB(tmp);
899 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
900 IEEE80211_TX_CTL_FIRST_FRAGMENT);
903 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
905 skb_copy_queue_mapping(tmp, skb);
906 tmp->priority = skb->priority;
909 /* copy header and data */
910 skb_put_data(tmp, skb->data, hdrlen);
911 skb_put_data(tmp, skb->data + pos, fraglen);
916 /* adjust first fragment's length */
917 skb_trim(skb, hdrlen + per_fragm);
921 static ieee80211_tx_result debug_noinline
922 ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
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;
931 /* no matter what happens, tx->skb moves to tx->skbs */
932 __skb_queue_tail(&tx->skbs, skb);
935 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
938 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
942 * Warn when submitting a fragmented A-MPDU frame and drop it.
943 * This scenario is handled in ieee80211_tx_prepare but extra
944 * caution taken here as fragmented ampdu may cause Tx stop.
946 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
949 hdrlen = ieee80211_hdrlen(hdr->frame_control);
951 /* internal error, why isn't DONTFRAG set? */
952 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
956 * Now fragment the frame. This will allocate all the fragments and
957 * chain them (using skb as the first fragment) to skb->next.
958 * During transmission, we will remove the successfully transmitted
959 * fragments from this list. When the low-level driver rejects one
960 * of the fragments then we will simply pretend to accept the skb
961 * but store it away as pending.
963 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
966 /* update duration/seq/flags of fragments */
969 skb_queue_walk(&tx->skbs, skb) {
970 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
972 hdr = (void *)skb->data;
973 info = IEEE80211_SKB_CB(skb);
975 if (!skb_queue_is_last(&tx->skbs, skb)) {
976 hdr->frame_control |= morefrags;
978 * No multi-rate retries for fragmented frames, that
979 * would completely throw off the NAV at other STAs.
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;
987 hdr->frame_control &= ~morefrags;
989 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
996 static ieee80211_tx_result debug_noinline
997 ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1005 skb_queue_walk(&tx->skbs, skb) {
1006 ac = skb_get_queue_mapping(skb);
1007 tx->sta->deflink.tx_stats.bytes[ac] += skb->len;
1010 tx->sta->deflink.tx_stats.packets[ac]++;
1015 static ieee80211_tx_result debug_noinline
1016 ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
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);
1044 return ieee80211_crypto_hw_encrypt(tx);
1050 static ieee80211_tx_result debug_noinline
1051 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1053 struct sk_buff *skb;
1054 struct ieee80211_hdr *hdr;
1058 skb_queue_walk(&tx->skbs, skb) {
1059 hdr = (void *) skb->data;
1060 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1061 break; /* must not overwrite AID */
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;
1067 group_addr = is_multicast_ether_addr(hdr->addr1);
1070 ieee80211_duration(tx, skb, group_addr, next_len);
1076 /* actual transmit path */
1078 static 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,
1084 bool queued = false;
1085 bool reset_agg_timer = false;
1086 struct sk_buff *purge_skb = NULL;
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)) {
1093 * nothing -- this aggregation session is being started
1094 * but that might still fail with the driver
1096 } else if (!tx->sta->sta.txq[tid]) {
1097 spin_lock(&tx->sta->lock);
1099 * Need to re-check now, because we may get here
1101 * 1) in the window during which the setup is actually
1102 * already done, but not marked yet because not all
1103 * packets are spliced over to the driver pending
1104 * queue yet -- if this happened we acquire the lock
1105 * either before or after the splice happens, but
1106 * need to recheck which of these cases happened.
1108 * 2) during session teardown, if the OPERATIONAL bit
1109 * was cleared due to the teardown but the pointer
1110 * hasn't been assigned NULL yet (or we loaded it
1111 * before it was assigned) -- in this case it may
1112 * now be NULL which means we should just let the
1113 * packet pass through because splicing the frames
1114 * back is already done.
1116 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1119 /* do nothing, let packet pass through */
1120 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1121 info->flags |= IEEE80211_TX_CTL_AMPDU;
1122 reset_agg_timer = 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);
1131 info->control.vif = &tx->sdata->vif;
1132 info->control.flags |= IEEE80211_TX_INTCFL_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);
1138 spin_unlock(&tx->sta->lock);
1141 ieee80211_free_txskb(&tx->local->hw, purge_skb);
1144 /* reset session timer */
1145 if (reset_agg_timer)
1146 tid_tx->last_tx = jiffies;
1152 ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
1153 struct sta_info *sta,
1154 struct sk_buff *skb)
1156 struct rate_control_ref *ref = sdata->local->rate_ctrl;
1159 if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER))
1162 if (!sta || !sta->sta.deflink.ht_cap.ht_supported ||
1163 !sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO ||
1164 skb->protocol == sdata->control_port_protocol)
1167 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1168 if (likely(sta->ampdu_mlme.tid_tx[tid]))
1171 ieee80211_start_tx_ba_session(&sta->sta, tid, 0);
1176 * pass %NULL for the station if unknown, a valid pointer if known
1177 * or an ERR_PTR() if the station is known not to exist
1179 static ieee80211_tx_result
1180 ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1181 struct ieee80211_tx_data *tx,
1182 struct sta_info *sta, struct sk_buff *skb)
1184 struct ieee80211_local *local = sdata->local;
1185 struct ieee80211_hdr *hdr;
1186 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1187 bool aggr_check = false;
1190 memset(tx, 0, sizeof(*tx));
1194 __skb_queue_head_init(&tx->skbs);
1197 * If this flag is set to true anywhere, and we get here,
1198 * we are doing the needed processing, so remove the flag
1201 info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1203 hdr = (struct ieee80211_hdr *) skb->data;
1209 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1210 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1211 if (!tx->sta && sdata->wdev.use_4addr)
1213 } else if (tx->sdata->control_port_protocol == tx->skb->protocol) {
1214 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1216 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) {
1217 tx->sta = sta_info_get(sdata, hdr->addr1);
1222 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
1223 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
1224 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1225 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1226 struct tid_ampdu_tx *tid_tx;
1228 tid = ieee80211_get_tid(hdr);
1229 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1230 if (!tid_tx && aggr_check) {
1231 ieee80211_aggr_check(sdata, tx->sta, skb);
1232 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1238 queued = ieee80211_tx_prep_agg(tx, skb, info,
1241 if (unlikely(queued))
1246 if (is_multicast_ether_addr(hdr->addr1)) {
1247 tx->flags &= ~IEEE80211_TX_UNICAST;
1248 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1250 tx->flags |= IEEE80211_TX_UNICAST;
1252 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1253 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1254 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1255 info->flags & IEEE80211_TX_CTL_AMPDU)
1256 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1260 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1261 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
1262 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1263 ieee80211_check_fast_xmit(tx->sta);
1266 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1271 static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1272 struct ieee80211_vif *vif,
1273 struct sta_info *sta,
1274 struct sk_buff *skb)
1276 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1277 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1278 struct ieee80211_txq *txq = NULL;
1280 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1281 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1284 if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
1285 unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1286 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
1287 ieee80211_is_bufferable_mmpdu(hdr->frame_control) ||
1288 vif->type == NL80211_IFTYPE_STATION) &&
1289 sta && sta->uploaded) {
1291 * This will be NULL if the driver didn't set the
1292 * opt-in hardware flag.
1294 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1297 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1302 txq = sta->sta.txq[tid];
1310 return to_txq_info(txq);
1313 static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1315 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1318 static u32 codel_skb_len_func(const struct sk_buff *skb)
1323 static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1325 const struct ieee80211_tx_info *info;
1327 info = (const struct ieee80211_tx_info *)skb->cb;
1328 return info->control.enqueue_time;
1331 static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1334 struct ieee80211_local *local;
1335 struct txq_info *txqi;
1337 struct fq_flow *flow;
1340 local = vif_to_sdata(txqi->txq.vif)->local;
1343 if (cvars == &txqi->def_cvars)
1344 flow = &txqi->tin.default_flow;
1346 flow = &fq->flows[cvars - local->cvars];
1348 return fq_flow_dequeue(fq, flow);
1351 static void codel_drop_func(struct sk_buff *skb,
1354 struct ieee80211_local *local;
1355 struct ieee80211_hw *hw;
1356 struct txq_info *txqi;
1359 local = vif_to_sdata(txqi->txq.vif)->local;
1362 ieee80211_free_txskb(hw, skb);
1365 static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1367 struct fq_flow *flow)
1369 struct ieee80211_local *local;
1370 struct txq_info *txqi;
1371 struct codel_vars *cvars;
1372 struct codel_params *cparams;
1373 struct codel_stats *cstats;
1375 local = container_of(fq, struct ieee80211_local, fq);
1376 txqi = container_of(tin, struct txq_info, tin);
1377 cstats = &txqi->cstats;
1379 if (txqi->txq.sta) {
1380 struct sta_info *sta = container_of(txqi->txq.sta,
1381 struct sta_info, sta);
1382 cparams = &sta->cparams;
1384 cparams = &local->cparams;
1387 if (flow == &tin->default_flow)
1388 cvars = &txqi->def_cvars;
1390 cvars = &local->cvars[flow - fq->flows];
1392 return codel_dequeue(txqi,
1398 codel_skb_time_func,
1400 codel_dequeue_func);
1403 static void fq_skb_free_func(struct fq *fq,
1405 struct fq_flow *flow,
1406 struct sk_buff *skb)
1408 struct ieee80211_local *local;
1410 local = container_of(fq, struct ieee80211_local, fq);
1411 ieee80211_free_txskb(&local->hw, skb);
1414 static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1415 struct txq_info *txqi,
1416 struct sk_buff *skb)
1418 struct fq *fq = &local->fq;
1419 struct fq_tin *tin = &txqi->tin;
1420 u32 flow_idx = fq_flow_idx(fq, skb);
1422 ieee80211_set_skb_enqueue_time(skb);
1424 spin_lock_bh(&fq->lock);
1426 * For management frames, don't really apply codel etc.,
1427 * we don't want to apply any shaping or anything we just
1428 * want to simplify the driver API by having them on the
1431 if (unlikely(txqi->txq.tid == IEEE80211_NUM_TIDS)) {
1432 IEEE80211_SKB_CB(skb)->control.flags |=
1433 IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1434 __skb_queue_tail(&txqi->frags, skb);
1436 fq_tin_enqueue(fq, tin, flow_idx, skb,
1439 spin_unlock_bh(&fq->lock);
1442 static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1443 struct fq_flow *flow, struct sk_buff *skb,
1446 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1448 return info->control.vif == data;
1451 void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1452 struct ieee80211_sub_if_data *sdata)
1454 struct fq *fq = &local->fq;
1455 struct txq_info *txqi;
1457 struct ieee80211_sub_if_data *ap;
1459 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1462 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1467 txqi = to_txq_info(ap->vif.txq);
1470 spin_lock_bh(&fq->lock);
1471 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1473 spin_unlock_bh(&fq->lock);
1476 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1477 struct sta_info *sta,
1478 struct txq_info *txqi, int tid)
1480 fq_tin_init(&txqi->tin);
1481 codel_vars_init(&txqi->def_cvars);
1482 codel_stats_init(&txqi->cstats);
1483 __skb_queue_head_init(&txqi->frags);
1484 RB_CLEAR_NODE(&txqi->schedule_order);
1486 txqi->txq.vif = &sdata->vif;
1489 sdata->vif.txq = &txqi->txq;
1491 txqi->txq.ac = IEEE80211_AC_BE;
1496 if (tid == IEEE80211_NUM_TIDS) {
1497 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1498 /* Drivers need to opt in to the management MPDU TXQ */
1499 if (!ieee80211_hw_check(&sdata->local->hw,
1502 } else if (!ieee80211_hw_check(&sdata->local->hw,
1504 /* Drivers need to opt in to the bufferable MMPDU TXQ */
1507 txqi->txq.ac = IEEE80211_AC_VO;
1509 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1512 txqi->txq.sta = &sta->sta;
1513 txqi->txq.tid = tid;
1514 sta->sta.txq[tid] = &txqi->txq;
1517 void ieee80211_txq_purge(struct ieee80211_local *local,
1518 struct txq_info *txqi)
1520 struct fq *fq = &local->fq;
1521 struct fq_tin *tin = &txqi->tin;
1523 spin_lock_bh(&fq->lock);
1524 fq_tin_reset(fq, tin, fq_skb_free_func);
1525 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
1526 spin_unlock_bh(&fq->lock);
1528 ieee80211_unschedule_txq(&local->hw, &txqi->txq, true);
1531 void ieee80211_txq_set_params(struct ieee80211_local *local)
1533 if (local->hw.wiphy->txq_limit)
1534 local->fq.limit = local->hw.wiphy->txq_limit;
1536 local->hw.wiphy->txq_limit = local->fq.limit;
1538 if (local->hw.wiphy->txq_memory_limit)
1539 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1541 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1543 if (local->hw.wiphy->txq_quantum)
1544 local->fq.quantum = local->hw.wiphy->txq_quantum;
1546 local->hw.wiphy->txq_quantum = local->fq.quantum;
1549 int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1551 struct fq *fq = &local->fq;
1554 bool supp_vht = false;
1555 enum nl80211_band band;
1557 if (!local->ops->wake_tx_queue)
1560 ret = fq_init(fq, 4096);
1565 * If the hardware doesn't support VHT, it is safe to limit the maximum
1566 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1568 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1569 struct ieee80211_supported_band *sband;
1571 sband = local->hw.wiphy->bands[band];
1575 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1579 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1581 codel_params_init(&local->cparams);
1582 local->cparams.interval = MS2TIME(100);
1583 local->cparams.target = MS2TIME(20);
1584 local->cparams.ecn = true;
1586 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1588 if (!local->cvars) {
1589 spin_lock_bh(&fq->lock);
1590 fq_reset(fq, fq_skb_free_func);
1591 spin_unlock_bh(&fq->lock);
1595 for (i = 0; i < fq->flows_cnt; i++)
1596 codel_vars_init(&local->cvars[i]);
1598 ieee80211_txq_set_params(local);
1603 void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1605 struct fq *fq = &local->fq;
1607 if (!local->ops->wake_tx_queue)
1610 kfree(local->cvars);
1611 local->cvars = NULL;
1613 spin_lock_bh(&fq->lock);
1614 fq_reset(fq, fq_skb_free_func);
1615 spin_unlock_bh(&fq->lock);
1618 static bool ieee80211_queue_skb(struct ieee80211_local *local,
1619 struct ieee80211_sub_if_data *sdata,
1620 struct sta_info *sta,
1621 struct sk_buff *skb)
1623 struct ieee80211_vif *vif;
1624 struct txq_info *txqi;
1626 if (!local->ops->wake_tx_queue ||
1627 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1630 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1631 sdata = container_of(sdata->bss,
1632 struct ieee80211_sub_if_data, u.ap);
1635 txqi = ieee80211_get_txq(local, vif, sta, skb);
1640 ieee80211_txq_enqueue(local, txqi, skb);
1642 schedule_and_wake_txq(local, txqi);
1647 static bool ieee80211_tx_frags(struct ieee80211_local *local,
1648 struct ieee80211_vif *vif,
1649 struct sta_info *sta,
1650 struct sk_buff_head *skbs,
1653 struct ieee80211_tx_control control = {};
1654 struct sk_buff *skb, *tmp;
1655 unsigned long flags;
1657 skb_queue_walk_safe(skbs, skb, tmp) {
1658 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1659 int q = info->hw_queue;
1661 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1662 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1663 __skb_unlink(skb, skbs);
1664 ieee80211_free_txskb(&local->hw, skb);
1669 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1670 if (local->queue_stop_reasons[q] ||
1671 (!txpending && !skb_queue_empty(&local->pending[q]))) {
1672 if (unlikely(info->flags &
1673 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1674 if (local->queue_stop_reasons[q] &
1675 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1677 * Drop off-channel frames if queues
1678 * are stopped for any reason other
1679 * than off-channel operation. Never
1682 spin_unlock_irqrestore(
1683 &local->queue_stop_reason_lock,
1685 ieee80211_purge_tx_queue(&local->hw,
1692 * Since queue is stopped, queue up frames for
1693 * later transmission from the tx-pending
1694 * tasklet when the queue is woken again.
1697 skb_queue_splice_init(skbs,
1698 &local->pending[q]);
1700 skb_queue_splice_tail_init(skbs,
1701 &local->pending[q]);
1703 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1708 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1710 info->control.vif = vif;
1711 control.sta = sta ? &sta->sta : NULL;
1713 __skb_unlink(skb, skbs);
1714 drv_tx(local, &control, skb);
1721 * Returns false if the frame couldn't be transmitted but was queued instead.
1723 static bool __ieee80211_tx(struct ieee80211_local *local,
1724 struct sk_buff_head *skbs, struct sta_info *sta,
1727 struct ieee80211_tx_info *info;
1728 struct ieee80211_sub_if_data *sdata;
1729 struct ieee80211_vif *vif;
1730 struct sk_buff *skb;
1733 if (WARN_ON(skb_queue_empty(skbs)))
1736 skb = skb_peek(skbs);
1737 info = IEEE80211_SKB_CB(skb);
1738 sdata = vif_to_sdata(info->control.vif);
1739 if (sta && !sta->uploaded)
1742 switch (sdata->vif.type) {
1743 case NL80211_IFTYPE_MONITOR:
1744 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1748 sdata = rcu_dereference(local->monitor_sdata);
1752 vif->hw_queue[skb_get_queue_mapping(skb)];
1753 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1754 ieee80211_purge_tx_queue(&local->hw, skbs);
1759 case NL80211_IFTYPE_AP_VLAN:
1760 sdata = container_of(sdata->bss,
1761 struct ieee80211_sub_if_data, u.ap);
1768 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
1770 WARN_ON_ONCE(!skb_queue_empty(skbs));
1776 * Invoke TX handlers, return 0 on success and non-zero if the
1777 * frame was dropped or queued.
1779 * The handlers are split into an early and late part. The latter is everything
1780 * that can be sensitive to reordering, and will be deferred to after packets
1781 * are dequeued from the intermediate queues (when they are enabled).
1783 static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1785 ieee80211_tx_result res = TX_DROP;
1787 #define CALL_TXH(txh) \
1790 if (res != TX_CONTINUE) \
1794 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1795 CALL_TXH(ieee80211_tx_h_check_assoc);
1796 CALL_TXH(ieee80211_tx_h_ps_buf);
1797 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1798 CALL_TXH(ieee80211_tx_h_select_key);
1801 if (unlikely(res == TX_DROP)) {
1802 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1804 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1806 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1808 } else if (unlikely(res == TX_QUEUED)) {
1809 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1817 * Late handlers can be called while the sta lock is held. Handlers that can
1818 * cause packets to be generated will cause deadlock!
1820 static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1822 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1823 ieee80211_tx_result res = TX_CONTINUE;
1825 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1826 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1828 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1829 __skb_queue_tail(&tx->skbs, tx->skb);
1834 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1835 CALL_TXH(ieee80211_tx_h_sequence);
1836 CALL_TXH(ieee80211_tx_h_fragment);
1837 /* handlers after fragment must be aware of tx info fragmentation! */
1838 CALL_TXH(ieee80211_tx_h_stats);
1839 CALL_TXH(ieee80211_tx_h_encrypt);
1840 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1841 CALL_TXH(ieee80211_tx_h_calculate_duration);
1845 if (unlikely(res == TX_DROP)) {
1846 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1848 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1850 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1852 } else if (unlikely(res == TX_QUEUED)) {
1853 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1860 static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1862 int r = invoke_tx_handlers_early(tx);
1866 return invoke_tx_handlers_late(tx);
1869 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1870 struct ieee80211_vif *vif, struct sk_buff *skb,
1871 int band, struct ieee80211_sta **sta)
1873 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1874 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1875 struct ieee80211_tx_data tx;
1876 struct sk_buff *skb2;
1878 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
1882 info->control.vif = vif;
1883 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1885 if (invoke_tx_handlers(&tx))
1890 *sta = &tx.sta->sta;
1895 /* this function isn't suitable for fragmented data frames */
1896 skb2 = __skb_dequeue(&tx.skbs);
1897 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1898 ieee80211_free_txskb(hw, skb2);
1899 ieee80211_purge_tx_queue(hw, &tx.skbs);
1905 EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1908 * Returns false if the frame couldn't be transmitted but was queued instead.
1910 static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1911 struct sta_info *sta, struct sk_buff *skb,
1914 struct ieee80211_local *local = sdata->local;
1915 struct ieee80211_tx_data tx;
1916 ieee80211_tx_result res_prepare;
1917 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1920 if (unlikely(skb->len < 10)) {
1925 /* initialises tx */
1926 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
1928 if (unlikely(res_prepare == TX_DROP)) {
1929 ieee80211_free_txskb(&local->hw, skb);
1931 } else if (unlikely(res_prepare == TX_QUEUED)) {
1935 /* set up hw_queue value early */
1936 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1937 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1939 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1941 if (invoke_tx_handlers_early(&tx))
1944 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1947 if (!invoke_tx_handlers_late(&tx))
1948 result = __ieee80211_tx(local, &tx.skbs, tx.sta, txpending);
1953 /* device xmit handlers */
1955 enum ieee80211_encrypt {
1961 static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1962 struct sk_buff *skb,
1964 enum ieee80211_encrypt encrypt)
1966 struct ieee80211_local *local = sdata->local;
1970 enc_tailroom = encrypt == ENCRYPT_MGMT ||
1971 (encrypt == ENCRYPT_DATA &&
1972 sdata->crypto_tx_tailroom_needed_cnt);
1975 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1976 tail_need -= skb_tailroom(skb);
1977 tail_need = max_t(int, tail_need, 0);
1980 if (skb_cloned(skb) &&
1981 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1982 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
1983 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1984 else if (head_need || tail_need)
1985 I802_DEBUG_INC(local->tx_expand_skb_head);
1989 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
1990 wiphy_debug(local->hw.wiphy,
1991 "failed to reallocate TX buffer\n");
1998 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1999 struct sta_info *sta, struct sk_buff *skb)
2001 struct ieee80211_local *local = sdata->local;
2002 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2003 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2005 enum ieee80211_encrypt encrypt;
2007 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
2008 encrypt = ENCRYPT_NO;
2009 else if (ieee80211_is_mgmt(hdr->frame_control))
2010 encrypt = ENCRYPT_MGMT;
2012 encrypt = ENCRYPT_DATA;
2014 headroom = local->tx_headroom;
2015 if (encrypt != ENCRYPT_NO)
2016 headroom += sdata->encrypt_headroom;
2017 headroom -= skb_headroom(skb);
2018 headroom = max_t(int, 0, headroom);
2020 if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) {
2021 ieee80211_free_txskb(&local->hw, skb);
2025 /* reload after potential resize */
2026 hdr = (struct ieee80211_hdr *) skb->data;
2027 info->control.vif = &sdata->vif;
2029 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2030 if (ieee80211_is_data(hdr->frame_control) &&
2031 is_unicast_ether_addr(hdr->addr1)) {
2032 if (mesh_nexthop_resolve(sdata, skb))
2033 return; /* skb queued: don't free */
2035 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2039 ieee80211_set_qos_hdr(sdata, skb);
2040 ieee80211_tx(sdata, sta, skb, false);
2043 static bool ieee80211_validate_radiotap_len(struct sk_buff *skb)
2045 struct ieee80211_radiotap_header *rthdr =
2046 (struct ieee80211_radiotap_header *)skb->data;
2048 /* check for not even having the fixed radiotap header part */
2049 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2050 return false; /* too short to be possibly valid */
2052 /* is it a header version we can trust to find length from? */
2053 if (unlikely(rthdr->it_version))
2054 return false; /* only version 0 is supported */
2056 /* does the skb contain enough to deliver on the alleged length? */
2057 if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data)))
2058 return false; /* skb too short for claimed rt header extent */
2063 bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
2064 struct net_device *dev)
2066 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2067 struct ieee80211_radiotap_iterator iterator;
2068 struct ieee80211_radiotap_header *rthdr =
2069 (struct ieee80211_radiotap_header *) skb->data;
2070 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2071 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2075 bool rate_found = false;
2076 u8 rate_retries = 0;
2078 u8 mcs_known, mcs_flags, mcs_bw;
2080 u8 vht_mcs = 0, vht_nss = 0;
2083 if (!ieee80211_validate_radiotap_len(skb))
2086 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2087 IEEE80211_TX_CTL_DONTFRAG;
2090 * for every radiotap entry that is present
2091 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2092 * entries present, or -EINVAL on error)
2096 ret = ieee80211_radiotap_iterator_next(&iterator);
2101 /* see if this argument is something we can use */
2102 switch (iterator.this_arg_index) {
2104 * You must take care when dereferencing iterator.this_arg
2105 * for multibyte types... the pointer is not aligned. Use
2106 * get_unaligned((type *)iterator.this_arg) to dereference
2107 * iterator.this_arg for type "type" safely on all arches.
2109 case IEEE80211_RADIOTAP_FLAGS:
2110 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2112 * this indicates that the skb we have been
2113 * handed has the 32-bit FCS CRC at the end...
2114 * we should react to that by snipping it off
2115 * because it will be recomputed and added
2118 if (skb->len < (iterator._max_length + FCS_LEN))
2121 skb_trim(skb, skb->len - FCS_LEN);
2123 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2124 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2125 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2126 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2129 case IEEE80211_RADIOTAP_TX_FLAGS:
2130 txflags = get_unaligned_le16(iterator.this_arg);
2131 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2132 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2133 if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO)
2134 info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO;
2135 if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER)
2136 info->control.flags |=
2137 IEEE80211_TX_CTRL_DONT_REORDER;
2140 case IEEE80211_RADIOTAP_RATE:
2141 rate = *iterator.this_arg;
2146 case IEEE80211_RADIOTAP_DATA_RETRIES:
2147 rate_retries = *iterator.this_arg;
2150 case IEEE80211_RADIOTAP_MCS:
2151 mcs_known = iterator.this_arg[0];
2152 mcs_flags = iterator.this_arg[1];
2153 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2157 rate = iterator.this_arg[2];
2158 rate_flags = IEEE80211_TX_RC_MCS;
2160 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2161 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2162 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2164 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2165 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2166 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2167 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2169 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_FEC &&
2170 mcs_flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC)
2171 info->flags |= IEEE80211_TX_CTL_LDPC;
2173 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_STBC) {
2174 u8 stbc = u8_get_bits(mcs_flags,
2175 IEEE80211_RADIOTAP_MCS_STBC_MASK);
2178 u32_encode_bits(stbc,
2179 IEEE80211_TX_CTL_STBC);
2183 case IEEE80211_RADIOTAP_VHT:
2184 vht_known = get_unaligned_le16(iterator.this_arg);
2187 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2188 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2189 (iterator.this_arg[2] &
2190 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2191 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2193 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2194 if (iterator.this_arg[3] == 1)
2196 IEEE80211_TX_RC_40_MHZ_WIDTH;
2197 else if (iterator.this_arg[3] == 4)
2199 IEEE80211_TX_RC_80_MHZ_WIDTH;
2200 else if (iterator.this_arg[3] == 11)
2202 IEEE80211_TX_RC_160_MHZ_WIDTH;
2205 vht_mcs = iterator.this_arg[4] >> 4;
2208 vht_nss = iterator.this_arg[4] & 0xF;
2209 if (!vht_nss || vht_nss > 8)
2214 * Please update the file
2215 * Documentation/networking/mac80211-injection.rst
2216 * when parsing new fields here.
2224 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2228 struct ieee80211_supported_band *sband =
2229 local->hw.wiphy->bands[info->band];
2231 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2233 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2234 info->control.rates[i].idx = -1;
2235 info->control.rates[i].flags = 0;
2236 info->control.rates[i].count = 0;
2239 if (rate_flags & IEEE80211_TX_RC_MCS) {
2240 info->control.rates[0].idx = rate;
2241 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2242 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2245 for (i = 0; i < sband->n_bitrates; i++) {
2246 if (rate * 5 != sband->bitrates[i].bitrate)
2249 info->control.rates[0].idx = i;
2254 if (info->control.rates[0].idx < 0)
2255 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2257 info->control.rates[0].flags = rate_flags;
2258 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2259 local->hw.max_rate_tries);
2265 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2266 struct net_device *dev)
2268 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2269 struct ieee80211_chanctx_conf *chanctx_conf;
2270 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2271 struct ieee80211_hdr *hdr;
2272 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2273 struct cfg80211_chan_def *chandef;
2277 memset(info, 0, sizeof(*info));
2278 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2279 IEEE80211_TX_CTL_INJECTED;
2281 /* Sanity-check the length of the radiotap header */
2282 if (!ieee80211_validate_radiotap_len(skb))
2285 /* we now know there is a radiotap header with a length we can use */
2286 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2289 * fix up the pointers accounting for the radiotap
2290 * header still being in there. We are being given
2291 * a precooked IEEE80211 header so no need for
2294 skb_set_mac_header(skb, len_rthdr);
2296 * these are just fixed to the end of the rt area since we
2297 * don't have any better information and at this point, nobody cares
2299 skb_set_network_header(skb, len_rthdr);
2300 skb_set_transport_header(skb, len_rthdr);
2302 if (skb->len < len_rthdr + 2)
2305 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2306 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2308 if (skb->len < len_rthdr + hdrlen)
2312 * Initialize skb->protocol if the injected frame is a data frame
2313 * carrying a rfc1042 header
2315 if (ieee80211_is_data(hdr->frame_control) &&
2316 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2317 u8 *payload = (u8 *)hdr + hdrlen;
2319 if (ether_addr_equal(payload, rfc1042_header))
2320 skb->protocol = cpu_to_be16((payload[6] << 8) |
2327 * We process outgoing injected frames that have a local address
2328 * we handle as though they are non-injected frames.
2329 * This code here isn't entirely correct, the local MAC address
2330 * isn't always enough to find the interface to use; for proper
2331 * VLAN support we have an nl80211-based mechanism.
2333 * This is necessary, for example, for old hostapd versions that
2334 * don't use nl80211-based management TX/RX.
2336 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2338 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2339 if (!ieee80211_sdata_running(tmp_sdata))
2341 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2342 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2344 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
2350 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2351 if (!chanctx_conf) {
2352 tmp_sdata = rcu_dereference(local->monitor_sdata);
2355 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2359 chandef = &chanctx_conf->def;
2360 else if (!local->use_chanctx)
2361 chandef = &local->_oper_chandef;
2366 * Frame injection is not allowed if beaconing is not allowed
2367 * or if we need radar detection. Beaconing is usually not allowed when
2368 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2369 * Passive scan is also used in world regulatory domains where
2370 * your country is not known and as such it should be treated as
2371 * NO TX unless the channel is explicitly allowed in which case
2372 * your current regulatory domain would not have the passive scan
2375 * Since AP mode uses monitor interfaces to inject/TX management
2376 * frames we can make AP mode the exception to this rule once it
2377 * supports radar detection as its implementation can deal with
2378 * radar detection by itself. We can do that later by adding a
2379 * monitor flag interfaces used for AP support.
2381 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2385 info->band = chandef->chan->band;
2387 /* Initialize skb->priority according to frame type and TID class,
2388 * with respect to the sub interface that the frame will actually
2389 * be transmitted on. If the DONT_REORDER flag is set, the original
2390 * skb-priority is preserved to assure frames injected with this
2391 * flag are not reordered relative to each other.
2393 ieee80211_select_queue_80211(sdata, skb, hdr);
2394 skb_set_queue_mapping(skb, ieee80211_ac_from_tid(skb->priority));
2397 * Process the radiotap header. This will now take into account the
2398 * selected chandef above to accurately set injection rates and
2401 if (!ieee80211_parse_tx_radiotap(skb, dev))
2404 /* remove the injection radiotap header */
2405 skb_pull(skb, len_rthdr);
2407 ieee80211_xmit(sdata, NULL, skb);
2410 return NETDEV_TX_OK;
2416 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
2419 static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2421 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2423 return ethertype == ETH_P_TDLS &&
2425 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2428 int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2429 struct sk_buff *skb,
2430 struct sta_info **sta_out)
2432 struct sta_info *sta;
2434 switch (sdata->vif.type) {
2435 case NL80211_IFTYPE_AP_VLAN:
2436 sta = rcu_dereference(sdata->u.vlan.sta);
2440 } else if (sdata->wdev.use_4addr) {
2444 case NL80211_IFTYPE_AP:
2445 case NL80211_IFTYPE_OCB:
2446 case NL80211_IFTYPE_ADHOC:
2447 if (is_multicast_ether_addr(skb->data)) {
2448 *sta_out = ERR_PTR(-ENOENT);
2451 sta = sta_info_get_bss(sdata, skb->data);
2453 #ifdef CONFIG_MAC80211_MESH
2454 case NL80211_IFTYPE_MESH_POINT:
2455 /* determined much later */
2459 case NL80211_IFTYPE_STATION:
2460 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2461 sta = sta_info_get(sdata, skb->data);
2462 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2463 if (test_sta_flag(sta,
2464 WLAN_STA_TDLS_PEER_AUTH)) {
2470 * TDLS link during setup - throw out frames to
2471 * peer. Allow TDLS-setup frames to unauthorized
2472 * peers for the special case of a link teardown
2473 * after a TDLS sta is removed due to being
2476 if (!ieee80211_is_tdls_setup(skb))
2482 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2490 *sta_out = sta ?: ERR_PTR(-ENOENT);
2494 static u16 ieee80211_store_ack_skb(struct ieee80211_local *local,
2495 struct sk_buff *skb,
2499 struct sk_buff *ack_skb;
2503 ack_skb = skb_clone_sk(skb);
2505 ack_skb = skb_clone(skb, GFP_ATOMIC);
2508 unsigned long flags;
2511 spin_lock_irqsave(&local->ack_status_lock, flags);
2512 id = idr_alloc(&local->ack_status_frames, ack_skb,
2513 1, 0x2000, GFP_ATOMIC);
2514 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2518 *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2520 *cookie = ieee80211_mgmt_tx_cookie(local);
2521 IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
2532 * ieee80211_build_hdr - build 802.11 header in the given frame
2533 * @sdata: virtual interface to build the header for
2534 * @skb: the skb to build the header in
2535 * @info_flags: skb flags to set
2536 * @sta: the station pointer
2537 * @ctrl_flags: info control flags to set
2538 * @cookie: cookie pointer to fill (if not %NULL)
2540 * This function takes the skb with 802.3 header and reformats the header to
2541 * the appropriate IEEE 802.11 header based on which interface the packet is
2542 * being transmitted on.
2544 * Note that this function also takes care of the TX status request and
2545 * potential unsharing of the SKB - this needs to be interleaved with the
2548 * The function requires the read-side RCU lock held
2550 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2552 static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2553 struct sk_buff *skb, u32 info_flags,
2554 struct sta_info *sta, u32 ctrl_flags,
2557 struct ieee80211_local *local = sdata->local;
2558 struct ieee80211_tx_info *info;
2560 u16 ethertype, hdrlen, meshhdrlen = 0;
2562 struct ieee80211_hdr hdr;
2563 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2564 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2565 const u8 *encaps_data;
2566 int encaps_len, skip_header_bytes;
2567 bool wme_sta = false, authorized = false;
2571 struct ieee80211_chanctx_conf *chanctx_conf;
2572 struct ieee80211_sub_if_data *ap_sdata;
2573 enum nl80211_band band;
2579 #ifdef CONFIG_MAC80211_DEBUGFS
2580 if (local->force_tx_status)
2581 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2584 /* convert Ethernet header to proper 802.11 header (based on
2585 * operation mode) */
2586 ethertype = (skb->data[12] << 8) | skb->data[13];
2587 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2589 switch (sdata->vif.type) {
2590 case NL80211_IFTYPE_AP_VLAN:
2591 if (sdata->wdev.use_4addr) {
2592 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2594 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2595 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2596 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2597 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2599 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2600 wme_sta = sta->sta.wme;
2602 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2604 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
2605 if (!chanctx_conf) {
2609 band = chanctx_conf->def.chan->band;
2610 if (sdata->wdev.use_4addr)
2613 case NL80211_IFTYPE_AP:
2614 if (sdata->vif.type == NL80211_IFTYPE_AP)
2615 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2616 if (!chanctx_conf) {
2620 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2622 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2623 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2624 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2626 band = chanctx_conf->def.chan->band;
2628 #ifdef CONFIG_MAC80211_MESH
2629 case NL80211_IFTYPE_MESH_POINT:
2630 if (!is_multicast_ether_addr(skb->data)) {
2631 struct sta_info *next_hop;
2632 bool mpp_lookup = true;
2634 mpath = mesh_path_lookup(sdata, skb->data);
2637 next_hop = rcu_dereference(mpath->next_hop);
2639 !(mpath->flags & (MESH_PATH_ACTIVE |
2640 MESH_PATH_RESOLVING)))
2645 mppath = mpp_path_lookup(sdata, skb->data);
2647 mppath->exp_time = jiffies;
2650 if (mppath && mpath)
2651 mesh_path_del(sdata, mpath->dst);
2655 * Use address extension if it is a packet from
2656 * another interface or if we know the destination
2657 * is being proxied by a portal (i.e. portal address
2658 * differs from proxied address)
2660 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2661 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
2662 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2663 skb->data, skb->data + ETH_ALEN);
2664 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2667 /* DS -> MBSS (802.11-2012 13.11.3.3).
2668 * For unicast with unknown forwarding information,
2669 * destination might be in the MBSS or if that fails
2670 * forwarded to another mesh gate. In either case
2671 * resolution will be handled in ieee80211_xmit(), so
2672 * leave the original DA. This also works for mcast */
2673 const u8 *mesh_da = skb->data;
2676 mesh_da = mppath->mpp;
2678 mesh_da = mpath->dst;
2680 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2681 mesh_da, sdata->vif.addr);
2682 if (is_multicast_ether_addr(mesh_da))
2683 /* DA TA mSA AE:SA */
2684 meshhdrlen = ieee80211_new_mesh_header(
2686 skb->data + ETH_ALEN, NULL);
2688 /* RA TA mDA mSA AE:DA SA */
2689 meshhdrlen = ieee80211_new_mesh_header(
2690 sdata, &mesh_hdr, skb->data,
2691 skb->data + ETH_ALEN);
2694 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2695 if (!chanctx_conf) {
2699 band = chanctx_conf->def.chan->band;
2701 /* For injected frames, fill RA right away as nexthop lookup
2704 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2705 is_zero_ether_addr(hdr.addr1))
2706 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2709 case NL80211_IFTYPE_STATION:
2710 /* we already did checks when looking up the RA STA */
2711 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
2715 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2716 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2717 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2719 } else if (sdata->u.mgd.use_4addr &&
2720 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2721 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2722 IEEE80211_FCTL_TODS);
2724 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2725 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2726 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2727 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2730 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2732 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2733 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2734 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2737 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2738 if (!chanctx_conf) {
2742 band = chanctx_conf->def.chan->band;
2744 case NL80211_IFTYPE_OCB:
2746 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2747 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2748 eth_broadcast_addr(hdr.addr3);
2750 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2751 if (!chanctx_conf) {
2755 band = chanctx_conf->def.chan->band;
2757 case NL80211_IFTYPE_ADHOC:
2759 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2760 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2761 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2763 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2764 if (!chanctx_conf) {
2768 band = chanctx_conf->def.chan->band;
2775 multicast = is_multicast_ether_addr(hdr.addr1);
2777 /* sta is always NULL for mesh */
2779 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2780 wme_sta = sta->sta.wme;
2781 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2782 /* For mesh, the use of the QoS header is mandatory */
2786 /* receiver does QoS (which also means we do) use it */
2788 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2793 * Drop unicast frames to unauthorised stations unless they are
2794 * EAPOL frames from the local station.
2796 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2797 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2798 !multicast && !authorized &&
2799 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2800 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
2801 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2802 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2803 sdata->name, hdr.addr1);
2806 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2812 if (unlikely(!multicast && ((skb->sk &&
2813 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) ||
2814 ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS)))
2815 info_id = ieee80211_store_ack_skb(local, skb, &info_flags,
2819 * If the skb is shared we need to obtain our own copy.
2821 if (skb_shared(skb)) {
2822 struct sk_buff *tmp_skb = skb;
2824 /* can't happen -- skb is a clone if info_id != 0 */
2827 skb = skb_clone(skb, GFP_ATOMIC);
2836 hdr.frame_control = fc;
2837 hdr.duration_id = 0;
2840 skip_header_bytes = ETH_HLEN;
2841 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2842 encaps_data = bridge_tunnel_header;
2843 encaps_len = sizeof(bridge_tunnel_header);
2844 skip_header_bytes -= 2;
2845 } else if (ethertype >= ETH_P_802_3_MIN) {
2846 encaps_data = rfc1042_header;
2847 encaps_len = sizeof(rfc1042_header);
2848 skip_header_bytes -= 2;
2854 skb_pull(skb, skip_header_bytes);
2855 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2858 * So we need to modify the skb header and hence need a copy of
2859 * that. The head_need variable above doesn't, so far, include
2860 * the needed header space that we don't need right away. If we
2861 * can, then we don't reallocate right now but only after the
2862 * frame arrives at the master device (if it does...)
2864 * If we cannot, however, then we will reallocate to include all
2865 * the ever needed space. Also, if we need to reallocate it anyway,
2866 * make it big enough for everything we may ever need.
2869 if (head_need > 0 || skb_cloned(skb)) {
2870 head_need += sdata->encrypt_headroom;
2871 head_need += local->tx_headroom;
2872 head_need = max_t(int, 0, head_need);
2873 if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) {
2874 ieee80211_free_txskb(&local->hw, skb);
2876 return ERR_PTR(-ENOMEM);
2881 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2883 #ifdef CONFIG_MAC80211_MESH
2885 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2888 if (ieee80211_is_data_qos(fc)) {
2889 __le16 *qos_control;
2891 qos_control = skb_push(skb, 2);
2892 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2894 * Maybe we could actually set some fields here, for now just
2895 * initialise to zero to indicate no special operation.
2899 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2901 skb_reset_mac_header(skb);
2903 info = IEEE80211_SKB_CB(skb);
2904 memset(info, 0, sizeof(*info));
2906 info->flags = info_flags;
2907 info->ack_frame_id = info_id;
2909 info->control.flags = ctrl_flags;
2914 return ERR_PTR(ret);
2918 * fast-xmit overview
2920 * The core idea of this fast-xmit is to remove per-packet checks by checking
2921 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2922 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2923 * much less work can be done per packet. For example, fragmentation must be
2924 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2927 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2928 * header and other data to aid packet processing in ieee80211_xmit_fast().
2930 * The most difficult part of this is that when any of these assumptions
2931 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2932 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2933 * since the per-packet code no longer checks the conditions. This is reflected
2934 * by the calls to these functions throughout the rest of the code, and must be
2935 * maintained if any of the TX path checks change.
2938 void ieee80211_check_fast_xmit(struct sta_info *sta)
2940 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2941 struct ieee80211_local *local = sta->local;
2942 struct ieee80211_sub_if_data *sdata = sta->sdata;
2943 struct ieee80211_hdr *hdr = (void *)build.hdr;
2944 struct ieee80211_chanctx_conf *chanctx_conf;
2947 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
2950 /* Locking here protects both the pointer itself, and against concurrent
2951 * invocations winning data access races to, e.g., the key pointer that
2953 * Without it, the invocation of this function right after the key
2954 * pointer changes wouldn't be sufficient, as another CPU could access
2955 * the pointer, then stall, and then do the cache update after the CPU
2956 * that invalidated the key.
2957 * With the locking, such scenarios cannot happen as the check for the
2958 * key and the fast-tx assignment are done atomically, so the CPU that
2959 * modifies the key will either wait or other one will see the key
2960 * cleared/changed already.
2962 spin_lock_bh(&sta->lock);
2963 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2964 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2965 sdata->vif.type == NL80211_IFTYPE_STATION)
2968 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2971 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2972 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2973 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2974 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
2977 if (sdata->noack_map)
2980 /* fast-xmit doesn't handle fragmentation at all */
2981 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2982 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
2986 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2987 if (!chanctx_conf) {
2991 build.band = chanctx_conf->def.chan->band;
2994 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2996 switch (sdata->vif.type) {
2997 case NL80211_IFTYPE_ADHOC:
2999 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3000 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3001 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
3004 case NL80211_IFTYPE_STATION:
3005 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
3007 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3008 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3009 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
3014 if (sdata->u.mgd.use_4addr) {
3015 /* non-regular ethertype cannot use the fastpath */
3016 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3017 IEEE80211_FCTL_TODS);
3019 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
3020 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3021 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3022 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3026 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
3028 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
3029 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3030 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3033 case NL80211_IFTYPE_AP_VLAN:
3034 if (sdata->wdev.use_4addr) {
3035 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3036 IEEE80211_FCTL_TODS);
3038 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
3039 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3040 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3041 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3046 case NL80211_IFTYPE_AP:
3047 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
3049 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3050 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3051 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
3055 /* not handled on fast-xmit */
3061 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3064 /* We store the key here so there's no point in using rcu_dereference()
3065 * but that's fine because the code that changes the pointers will call
3066 * this function after doing so. For a single CPU that would be enough,
3067 * for multiple see the comment above.
3069 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3071 build.key = rcu_access_pointer(sdata->default_unicast_key);
3073 bool gen_iv, iv_spc, mmic;
3075 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3076 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
3077 mmic = build.key->conf.flags &
3078 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3079 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3081 /* don't handle software crypto */
3082 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3085 /* Key is being removed */
3086 if (build.key->flags & KEY_FLAG_TAINTED)
3089 switch (build.key->conf.cipher) {
3090 case WLAN_CIPHER_SUITE_CCMP:
3091 case WLAN_CIPHER_SUITE_CCMP_256:
3093 build.pn_offs = build.hdr_len;
3094 if (gen_iv || iv_spc)
3095 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3097 case WLAN_CIPHER_SUITE_GCMP:
3098 case WLAN_CIPHER_SUITE_GCMP_256:
3100 build.pn_offs = build.hdr_len;
3101 if (gen_iv || iv_spc)
3102 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3104 case WLAN_CIPHER_SUITE_TKIP:
3105 /* cannot handle MMIC or IV generation in xmit-fast */
3109 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3111 case WLAN_CIPHER_SUITE_WEP40:
3112 case WLAN_CIPHER_SUITE_WEP104:
3113 /* cannot handle IV generation in fast-xmit */
3117 build.hdr_len += IEEE80211_WEP_IV_LEN;
3119 case WLAN_CIPHER_SUITE_AES_CMAC:
3120 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3121 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3122 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3124 "management cipher suite 0x%x enabled for data\n",
3125 build.key->conf.cipher);
3128 /* we don't know how to generate IVs for this at all */
3129 if (WARN_ON(gen_iv))
3131 /* pure hardware keys are OK, of course */
3132 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3134 /* cipher scheme might require space allocation */
3136 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3139 build.hdr_len += build.key->conf.iv_len;
3142 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3145 hdr->frame_control = fc;
3147 memcpy(build.hdr + build.hdr_len,
3148 rfc1042_header, sizeof(rfc1042_header));
3149 build.hdr_len += sizeof(rfc1042_header);
3151 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3152 /* if the kmemdup fails, continue w/o fast_tx */
3155 /* we might have raced against another call to this function */
3156 old = rcu_dereference_protected(sta->fast_tx,
3157 lockdep_is_held(&sta->lock));
3158 rcu_assign_pointer(sta->fast_tx, fast_tx);
3160 kfree_rcu(old, rcu_head);
3161 spin_unlock_bh(&sta->lock);
3164 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3166 struct sta_info *sta;
3169 list_for_each_entry_rcu(sta, &local->sta_list, list)
3170 ieee80211_check_fast_xmit(sta);
3174 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3176 struct ieee80211_local *local = sdata->local;
3177 struct sta_info *sta;
3181 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3182 if (sdata != sta->sdata &&
3183 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3185 ieee80211_check_fast_xmit(sta);
3191 void ieee80211_clear_fast_xmit(struct sta_info *sta)
3193 struct ieee80211_fast_tx *fast_tx;
3195 spin_lock_bh(&sta->lock);
3196 fast_tx = rcu_dereference_protected(sta->fast_tx,
3197 lockdep_is_held(&sta->lock));
3198 RCU_INIT_POINTER(sta->fast_tx, NULL);
3199 spin_unlock_bh(&sta->lock);
3202 kfree_rcu(fast_tx, rcu_head);
3205 static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3206 struct sk_buff *skb, int headroom)
3208 if (skb_headroom(skb) < headroom) {
3209 I802_DEBUG_INC(local->tx_expand_skb_head);
3211 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
3212 wiphy_debug(local->hw.wiphy,
3213 "failed to reallocate TX buffer\n");
3221 static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3222 struct ieee80211_fast_tx *fast_tx,
3223 struct sk_buff *skb)
3225 struct ieee80211_local *local = sdata->local;
3226 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3227 struct ieee80211_hdr *hdr;
3228 struct ethhdr *amsdu_hdr;
3229 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3230 int subframe_len = skb->len - hdr_len;
3232 u8 *qc, *h_80211_src, *h_80211_dst;
3235 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3238 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3241 if (!ieee80211_amsdu_realloc_pad(local, skb,
3242 sizeof(*amsdu_hdr) +
3243 local->hw.extra_tx_headroom))
3246 data = skb_push(skb, sizeof(*amsdu_hdr));
3247 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3249 amsdu_hdr = data + hdr_len;
3250 /* h_80211_src/dst is addr* field within hdr */
3251 h_80211_src = data + fast_tx->sa_offs;
3252 h_80211_dst = data + fast_tx->da_offs;
3254 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3255 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3256 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3258 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3259 * fields needs to be changed to BSSID for A-MSDU frames depending
3260 * on FromDS/ToDS values.
3262 switch (sdata->vif.type) {
3263 case NL80211_IFTYPE_STATION:
3264 bssid = sdata->u.mgd.bssid;
3266 case NL80211_IFTYPE_AP:
3267 case NL80211_IFTYPE_AP_VLAN:
3268 bssid = sdata->vif.addr;
3274 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3275 ether_addr_copy(h_80211_src, bssid);
3277 if (bssid && ieee80211_has_tods(hdr->frame_control))
3278 ether_addr_copy(h_80211_dst, bssid);
3280 qc = ieee80211_get_qos_ctl(hdr);
3281 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3283 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3288 static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3289 struct sta_info *sta,
3290 struct ieee80211_fast_tx *fast_tx,
3291 struct sk_buff *skb)
3293 struct ieee80211_local *local = sdata->local;
3294 struct fq *fq = &local->fq;
3296 struct fq_flow *flow;
3297 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3298 struct ieee80211_txq *txq = sta->sta.txq[tid];
3299 struct txq_info *txqi;
3300 struct sk_buff **frag_tail, *head;
3301 int subframe_len = skb->len - ETH_ALEN;
3302 u8 max_subframes = sta->sta.max_amsdu_subframes;
3303 int max_frags = local->hw.max_tx_fragments;
3304 int max_amsdu_len = sta->sta.max_amsdu_len;
3310 unsigned int orig_len;
3311 int n = 2, nfrags, pad = 0;
3314 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3317 if (sdata->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED)
3320 if (skb_is_gso(skb))
3326 txqi = to_txq_info(txq);
3327 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3330 if (sta->sta.max_rc_amsdu_len)
3331 max_amsdu_len = min_t(int, max_amsdu_len,
3332 sta->sta.max_rc_amsdu_len);
3334 if (sta->sta.max_tid_amsdu_len[tid])
3335 max_amsdu_len = min_t(int, max_amsdu_len,
3336 sta->sta.max_tid_amsdu_len[tid]);
3338 flow_idx = fq_flow_idx(fq, skb);
3340 spin_lock_bh(&fq->lock);
3342 /* TODO: Ideally aggregation should be done on dequeue to remain
3343 * responsive to environment changes.
3347 flow = fq_flow_classify(fq, tin, flow_idx, skb);
3348 head = skb_peek_tail(&flow->queue);
3349 if (!head || skb_is_gso(head))
3352 orig_truesize = head->truesize;
3353 orig_len = head->len;
3355 if (skb->len + head->len > max_amsdu_len)
3358 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3359 nfrags += 1 + skb_shinfo(head)->nr_frags;
3360 frag_tail = &skb_shinfo(head)->frag_list;
3361 while (*frag_tail) {
3362 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3363 frag_tail = &(*frag_tail)->next;
3367 if (max_subframes && n > max_subframes)
3370 if (max_frags && nfrags > max_frags)
3373 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3376 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3379 /* If n == 2, the "while (*frag_tail)" loop above didn't execute
3380 * and frag_tail should be &skb_shinfo(head)->frag_list.
3381 * However, ieee80211_amsdu_prepare_head() can reallocate it.
3382 * Reload frag_tail to have it pointing to the correct place.
3385 frag_tail = &skb_shinfo(head)->frag_list;
3388 * Pad out the previous subframe to a multiple of 4 by adding the
3389 * padding to the next one, that's being added. Note that head->len
3390 * is the length of the full A-MSDU, but that works since each time
3391 * we add a new subframe we pad out the previous one to a multiple
3392 * of 4 and thus it no longer matters in the next round.
3394 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3395 if ((head->len - hdrlen) & 3)
3396 pad = 4 - ((head->len - hdrlen) & 3);
3398 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
3403 data = skb_push(skb, ETH_ALEN + 2);
3404 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3406 data += 2 * ETH_ALEN;
3407 len = cpu_to_be16(subframe_len);
3408 memcpy(data, &len, 2);
3409 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3411 memset(skb_push(skb, pad), 0, pad);
3413 head->len += skb->len;
3414 head->data_len += skb->len;
3418 fq->memory_usage += head->truesize - orig_truesize;
3419 if (head->len != orig_len) {
3420 flow->backlog += head->len - orig_len;
3421 tin->backlog_bytes += head->len - orig_len;
3424 spin_unlock_bh(&fq->lock);
3430 * Can be called while the sta lock is held. Anything that can cause packets to
3431 * be generated will cause deadlock!
3433 static ieee80211_tx_result
3434 ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3435 struct sta_info *sta, u8 pn_offs,
3436 struct ieee80211_key *key,
3437 struct ieee80211_tx_data *tx)
3439 struct sk_buff *skb = tx->skb;
3440 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3441 struct ieee80211_hdr *hdr = (void *)skb->data;
3442 u8 tid = IEEE80211_NUM_TIDS;
3444 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL) &&
3445 ieee80211_tx_h_rate_ctrl(tx) != TX_CONTINUE)
3449 info->control.hw_key = &key->conf;
3451 dev_sw_netstats_tx_add(skb->dev, 1, skb->len);
3453 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3454 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3455 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3457 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3458 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3459 sdata->sequence_number += 0x10;
3462 if (skb_shinfo(skb)->gso_size)
3463 sta->deflink.tx_stats.msdu[tid] +=
3464 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3466 sta->deflink.tx_stats.msdu[tid]++;
3468 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3470 /* statistics normally done by ieee80211_tx_h_stats (but that
3471 * has to consider fragmentation, so is more complex)
3473 sta->deflink.tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3474 sta->deflink.tx_stats.packets[skb_get_queue_mapping(skb)]++;
3478 u8 *crypto_hdr = skb->data + pn_offs;
3480 switch (key->conf.cipher) {
3481 case WLAN_CIPHER_SUITE_CCMP:
3482 case WLAN_CIPHER_SUITE_CCMP_256:
3483 case WLAN_CIPHER_SUITE_GCMP:
3484 case WLAN_CIPHER_SUITE_GCMP_256:
3485 pn = atomic64_inc_return(&key->conf.tx_pn);
3487 crypto_hdr[1] = pn >> 8;
3488 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3489 crypto_hdr[4] = pn >> 16;
3490 crypto_hdr[5] = pn >> 24;
3491 crypto_hdr[6] = pn >> 32;
3492 crypto_hdr[7] = pn >> 40;
3500 static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3501 struct sta_info *sta,
3502 struct ieee80211_fast_tx *fast_tx,
3503 struct sk_buff *skb)
3505 struct ieee80211_local *local = sdata->local;
3506 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3507 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3508 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3510 struct ieee80211_tx_info *info;
3511 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3512 struct ieee80211_tx_data tx;
3513 ieee80211_tx_result r;
3514 struct tid_ampdu_tx *tid_tx = NULL;
3515 u8 tid = IEEE80211_NUM_TIDS;
3517 /* control port protocol needs a lot of special handling */
3518 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3521 /* only RFC 1042 SNAP */
3522 if (ethertype < ETH_P_802_3_MIN)
3525 /* don't handle TX status request here either */
3526 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3529 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3530 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3531 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3533 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3535 if (tid_tx->timeout)
3536 tid_tx->last_tx = jiffies;
3540 /* after this point (skb is modified) we cannot return false */
3542 if (skb_shared(skb)) {
3543 struct sk_buff *tmp_skb = skb;
3545 skb = skb_clone(skb, GFP_ATOMIC);
3552 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3553 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3556 /* will not be crypto-handled beyond what we do here, so use false
3557 * as the may-encrypt argument for the resize to not account for
3558 * more room than we already have in 'extra_head'
3560 if (unlikely(ieee80211_skb_resize(sdata, skb,
3561 max_t(int, extra_head + hw_headroom -
3562 skb_headroom(skb), 0),
3568 memcpy(ð, skb->data, ETH_HLEN - 2);
3569 hdr = skb_push(skb, extra_head);
3570 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3571 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3572 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3574 info = IEEE80211_SKB_CB(skb);
3575 memset(info, 0, sizeof(*info));
3576 info->band = fast_tx->band;
3577 info->control.vif = &sdata->vif;
3578 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3579 IEEE80211_TX_CTL_DONTFRAG |
3580 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3581 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
3583 #ifdef CONFIG_MAC80211_DEBUGFS
3584 if (local->force_tx_status)
3585 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3588 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3589 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3590 *ieee80211_get_qos_ctl(hdr) = tid;
3593 __skb_queue_head_init(&tx.skbs);
3595 tx.flags = IEEE80211_TX_UNICAST;
3599 tx.key = fast_tx->key;
3601 if (ieee80211_queue_skb(local, sdata, sta, skb))
3605 r = ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3613 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3614 sdata = container_of(sdata->bss,
3615 struct ieee80211_sub_if_data, u.ap);
3617 __skb_queue_tail(&tx.skbs, skb);
3618 ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false);
3622 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3623 struct ieee80211_txq *txq)
3625 struct ieee80211_local *local = hw_to_local(hw);
3626 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3627 struct ieee80211_hdr *hdr;
3628 struct sk_buff *skb = NULL;
3629 struct fq *fq = &local->fq;
3630 struct fq_tin *tin = &txqi->tin;
3631 struct ieee80211_tx_info *info;
3632 struct ieee80211_tx_data tx;
3633 ieee80211_tx_result r;
3634 struct ieee80211_vif *vif = txq->vif;
3636 WARN_ON_ONCE(softirq_count() == 0);
3638 if (!ieee80211_txq_airtime_check(hw, txq))
3642 spin_lock_bh(&fq->lock);
3644 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) ||
3645 test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags))
3648 if (vif->txqs_stopped[txq->ac]) {
3649 set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags);
3653 /* Make sure fragments stay together. */
3654 skb = __skb_dequeue(&txqi->frags);
3655 if (unlikely(skb)) {
3656 if (!(IEEE80211_SKB_CB(skb)->control.flags &
3657 IEEE80211_TX_INTCFL_NEED_TXPROCESSING))
3659 IEEE80211_SKB_CB(skb)->control.flags &=
3660 ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
3662 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3668 spin_unlock_bh(&fq->lock);
3670 hdr = (struct ieee80211_hdr *)skb->data;
3671 info = IEEE80211_SKB_CB(skb);
3673 memset(&tx, 0, sizeof(tx));
3674 __skb_queue_head_init(&tx.skbs);
3677 tx.sdata = vif_to_sdata(info->control.vif);
3680 tx.sta = container_of(txq->sta, struct sta_info, sta);
3682 * Drop unicast frames to unauthorised stations unless they are
3683 * injected frames or EAPOL frames from the local station.
3685 if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
3686 ieee80211_is_data(hdr->frame_control) &&
3687 !ieee80211_vif_is_mesh(&tx.sdata->vif) &&
3688 tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3689 !is_multicast_ether_addr(hdr->addr1) &&
3690 !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3691 (!(info->control.flags &
3692 IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3693 !ether_addr_equal(tx.sdata->vif.addr,
3695 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3696 ieee80211_free_txskb(&local->hw, skb);
3702 * The key can be removed while the packet was queued, so need to call
3703 * this here to get the current key.
3705 r = ieee80211_tx_h_select_key(&tx);
3706 if (r != TX_CONTINUE) {
3707 ieee80211_free_txskb(&local->hw, skb);
3711 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3712 info->flags |= IEEE80211_TX_CTL_AMPDU;
3714 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3716 if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
3717 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3718 r = ieee80211_tx_h_rate_ctrl(&tx);
3719 if (r != TX_CONTINUE) {
3720 ieee80211_free_txskb(&local->hw, skb);
3727 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3728 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3733 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3734 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3736 r = ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3738 if (r != TX_CONTINUE) {
3739 ieee80211_free_txskb(&local->hw, skb);
3743 if (invoke_tx_handlers_late(&tx))
3746 skb = __skb_dequeue(&tx.skbs);
3748 if (!skb_queue_empty(&tx.skbs)) {
3749 spin_lock_bh(&fq->lock);
3750 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
3751 spin_unlock_bh(&fq->lock);
3755 if (skb_has_frag_list(skb) &&
3756 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3757 if (skb_linearize(skb)) {
3758 ieee80211_free_txskb(&local->hw, skb);
3763 switch (tx.sdata->vif.type) {
3764 case NL80211_IFTYPE_MONITOR:
3765 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3766 vif = &tx.sdata->vif;
3769 tx.sdata = rcu_dereference(local->monitor_sdata);
3771 vif = &tx.sdata->vif;
3773 vif->hw_queue[skb_get_queue_mapping(skb)];
3774 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3775 ieee80211_free_txskb(&local->hw, skb);
3781 case NL80211_IFTYPE_AP_VLAN:
3782 tx.sdata = container_of(tx.sdata->bss,
3783 struct ieee80211_sub_if_data, u.ap);
3786 vif = &tx.sdata->vif;
3791 IEEE80211_SKB_CB(skb)->control.vif = vif;
3794 wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) {
3795 bool ampdu = txq->ac != IEEE80211_AC_VO;
3798 airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta,
3801 airtime = ieee80211_info_set_tx_time_est(info, airtime);
3802 ieee80211_sta_update_pending_airtime(local, tx.sta,
3812 spin_unlock_bh(&fq->lock);
3816 EXPORT_SYMBOL(ieee80211_tx_dequeue);
3818 struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
3820 struct ieee80211_local *local = hw_to_local(hw);
3821 struct airtime_sched_info *air_sched;
3822 u64 now = ktime_get_coarse_boottime_ns();
3823 struct ieee80211_txq *ret = NULL;
3824 struct airtime_info *air_info;
3825 struct txq_info *txqi = NULL;
3826 struct rb_node *node;
3829 air_sched = &local->airtime[ac];
3830 spin_lock_bh(&air_sched->lock);
3832 node = air_sched->schedule_pos;
3836 node = rb_first_cached(&air_sched->active_txqs);
3839 node = rb_next(node);
3845 txqi = container_of(node, struct txq_info, schedule_order);
3846 air_info = to_airtime_info(&txqi->txq);
3848 if (air_info->v_t > air_sched->v_t &&
3849 (!first || !airtime_catchup_v_t(air_sched, air_info->v_t, now)))
3852 if (!ieee80211_txq_airtime_check(hw, &txqi->txq)) {
3857 air_sched->schedule_pos = node;
3858 air_sched->last_schedule_activity = now;
3861 spin_unlock_bh(&air_sched->lock);
3864 EXPORT_SYMBOL(ieee80211_next_txq);
3866 static void __ieee80211_insert_txq(struct rb_root_cached *root,
3867 struct txq_info *txqi)
3869 struct rb_node **new = &root->rb_root.rb_node;
3870 struct airtime_info *old_air, *new_air;
3871 struct rb_node *parent = NULL;
3872 struct txq_info *__txqi;
3873 bool leftmost = true;
3877 __txqi = rb_entry(parent, struct txq_info, schedule_order);
3878 old_air = to_airtime_info(&__txqi->txq);
3879 new_air = to_airtime_info(&txqi->txq);
3881 if (new_air->v_t <= old_air->v_t) {
3882 new = &parent->rb_left;
3884 new = &parent->rb_right;
3889 rb_link_node(&txqi->schedule_order, parent, new);
3890 rb_insert_color_cached(&txqi->schedule_order, root, leftmost);
3893 void ieee80211_resort_txq(struct ieee80211_hw *hw,
3894 struct ieee80211_txq *txq)
3896 struct airtime_info *air_info = to_airtime_info(txq);
3897 struct ieee80211_local *local = hw_to_local(hw);
3898 struct txq_info *txqi = to_txq_info(txq);
3899 struct airtime_sched_info *air_sched;
3901 air_sched = &local->airtime[txq->ac];
3903 lockdep_assert_held(&air_sched->lock);
3905 if (!RB_EMPTY_NODE(&txqi->schedule_order)) {
3906 struct airtime_info *a_prev = NULL, *a_next = NULL;
3907 struct txq_info *t_prev, *t_next;
3908 struct rb_node *n_prev, *n_next;
3910 /* Erasing a node can cause an expensive rebalancing operation,
3911 * so we check the previous and next nodes first and only remove
3912 * and re-insert if the current node is not already in the
3915 if ((n_prev = rb_prev(&txqi->schedule_order)) != NULL) {
3916 t_prev = container_of(n_prev, struct txq_info,
3918 a_prev = to_airtime_info(&t_prev->txq);
3921 if ((n_next = rb_next(&txqi->schedule_order)) != NULL) {
3922 t_next = container_of(n_next, struct txq_info,
3924 a_next = to_airtime_info(&t_next->txq);
3927 if ((!a_prev || a_prev->v_t <= air_info->v_t) &&
3928 (!a_next || a_next->v_t > air_info->v_t))
3931 if (air_sched->schedule_pos == &txqi->schedule_order)
3932 air_sched->schedule_pos = n_prev;
3934 rb_erase_cached(&txqi->schedule_order,
3935 &air_sched->active_txqs);
3936 RB_CLEAR_NODE(&txqi->schedule_order);
3937 __ieee80211_insert_txq(&air_sched->active_txqs, txqi);
3941 void ieee80211_update_airtime_weight(struct ieee80211_local *local,
3942 struct airtime_sched_info *air_sched,
3943 u64 now, bool force)
3945 struct airtime_info *air_info, *tmp;
3949 now = ktime_get_coarse_boottime_ns();
3951 lockdep_assert_held(&air_sched->lock);
3953 if (!force && (air_sched->last_weight_update <
3954 now - AIRTIME_ACTIVE_DURATION))
3957 list_for_each_entry_safe(air_info, tmp,
3958 &air_sched->active_list, list) {
3959 if (airtime_is_active(air_info, now))
3960 weight_sum += air_info->weight;
3962 list_del_init(&air_info->list);
3964 airtime_weight_sum_set(air_sched, weight_sum);
3965 air_sched->last_weight_update = now;
3968 void ieee80211_schedule_txq(struct ieee80211_hw *hw,
3969 struct ieee80211_txq *txq)
3970 __acquires(txq_lock) __releases(txq_lock)
3972 struct ieee80211_local *local = hw_to_local(hw);
3973 struct txq_info *txqi = to_txq_info(txq);
3974 struct airtime_sched_info *air_sched;
3975 u64 now = ktime_get_coarse_boottime_ns();
3976 struct airtime_info *air_info;
3980 air_sched = &local->airtime[ac];
3981 air_info = to_airtime_info(txq);
3983 spin_lock_bh(&air_sched->lock);
3984 was_active = airtime_is_active(air_info, now);
3985 airtime_set_active(air_sched, air_info, now);
3987 if (!RB_EMPTY_NODE(&txqi->schedule_order))
3990 /* If the station has been inactive for a while, catch up its v_t so it
3991 * doesn't get indefinite priority; see comment above the definition of
3992 * AIRTIME_MAX_BEHIND.
3994 if ((!was_active && air_info->v_t < air_sched->v_t) ||
3995 air_info->v_t < air_sched->v_t - AIRTIME_MAX_BEHIND)
3996 air_info->v_t = air_sched->v_t;
3998 ieee80211_update_airtime_weight(local, air_sched, now, !was_active);
3999 __ieee80211_insert_txq(&air_sched->active_txqs, txqi);
4002 spin_unlock_bh(&air_sched->lock);
4004 EXPORT_SYMBOL(ieee80211_schedule_txq);
4006 static void __ieee80211_unschedule_txq(struct ieee80211_hw *hw,
4007 struct ieee80211_txq *txq,
4010 struct ieee80211_local *local = hw_to_local(hw);
4011 struct txq_info *txqi = to_txq_info(txq);
4012 struct airtime_sched_info *air_sched;
4013 struct airtime_info *air_info;
4015 air_sched = &local->airtime[txq->ac];
4016 air_info = to_airtime_info(&txqi->txq);
4018 lockdep_assert_held(&air_sched->lock);
4021 list_del_init(&air_info->list);
4022 ieee80211_update_airtime_weight(local, air_sched, 0, true);
4025 if (RB_EMPTY_NODE(&txqi->schedule_order))
4028 if (air_sched->schedule_pos == &txqi->schedule_order)
4029 air_sched->schedule_pos = rb_prev(&txqi->schedule_order);
4032 airtime_set_active(air_sched, air_info,
4033 ktime_get_coarse_boottime_ns());
4035 rb_erase_cached(&txqi->schedule_order,
4036 &air_sched->active_txqs);
4037 RB_CLEAR_NODE(&txqi->schedule_order);
4040 void ieee80211_unschedule_txq(struct ieee80211_hw *hw,
4041 struct ieee80211_txq *txq,
4043 __acquires(txq_lock) __releases(txq_lock)
4045 struct ieee80211_local *local = hw_to_local(hw);
4047 spin_lock_bh(&local->airtime[txq->ac].lock);
4048 __ieee80211_unschedule_txq(hw, txq, purge);
4049 spin_unlock_bh(&local->airtime[txq->ac].lock);
4052 void ieee80211_return_txq(struct ieee80211_hw *hw,
4053 struct ieee80211_txq *txq, bool force)
4055 struct ieee80211_local *local = hw_to_local(hw);
4056 struct txq_info *txqi = to_txq_info(txq);
4058 spin_lock_bh(&local->airtime[txq->ac].lock);
4060 if (!RB_EMPTY_NODE(&txqi->schedule_order) && !force &&
4061 !txq_has_queue(txq))
4062 __ieee80211_unschedule_txq(hw, txq, false);
4064 spin_unlock_bh(&local->airtime[txq->ac].lock);
4066 EXPORT_SYMBOL(ieee80211_return_txq);
4068 DEFINE_STATIC_KEY_FALSE(aql_disable);
4070 bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
4071 struct ieee80211_txq *txq)
4073 struct airtime_info *air_info = to_airtime_info(txq);
4074 struct ieee80211_local *local = hw_to_local(hw);
4076 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
4079 if (static_branch_unlikely(&aql_disable))
4085 if (unlikely(txq->tid == IEEE80211_NUM_TIDS))
4088 if (atomic_read(&air_info->aql_tx_pending) < air_info->aql_limit_low)
4091 if (atomic_read(&local->aql_total_pending_airtime) <
4092 local->aql_threshold &&
4093 atomic_read(&air_info->aql_tx_pending) < air_info->aql_limit_high)
4098 EXPORT_SYMBOL(ieee80211_txq_airtime_check);
4100 bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
4101 struct ieee80211_txq *txq)
4103 struct txq_info *first_txqi = NULL, *txqi = to_txq_info(txq);
4104 struct ieee80211_local *local = hw_to_local(hw);
4105 struct airtime_sched_info *air_sched;
4106 struct airtime_info *air_info;
4107 struct rb_node *node = NULL;
4112 if (!ieee80211_txq_airtime_check(hw, txq))
4115 air_sched = &local->airtime[txq->ac];
4116 spin_lock_bh(&air_sched->lock);
4118 if (RB_EMPTY_NODE(&txqi->schedule_order))
4121 now = ktime_get_coarse_boottime_ns();
4123 /* Like in ieee80211_next_txq(), make sure the first station in the
4124 * scheduling order is eligible for transmission to avoid starvation.
4126 node = rb_first_cached(&air_sched->active_txqs);
4128 first_txqi = container_of(node, struct txq_info,
4130 air_info = to_airtime_info(&first_txqi->txq);
4132 if (air_sched->v_t < air_info->v_t)
4133 airtime_catchup_v_t(air_sched, air_info->v_t, now);
4136 air_info = to_airtime_info(&txqi->txq);
4137 if (air_info->v_t <= air_sched->v_t) {
4138 air_sched->last_schedule_activity = now;
4143 spin_unlock_bh(&air_sched->lock);
4146 EXPORT_SYMBOL(ieee80211_txq_may_transmit);
4148 void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
4150 struct ieee80211_local *local = hw_to_local(hw);
4151 struct airtime_sched_info *air_sched = &local->airtime[ac];
4153 spin_lock_bh(&air_sched->lock);
4154 air_sched->schedule_pos = NULL;
4155 spin_unlock_bh(&air_sched->lock);
4157 EXPORT_SYMBOL(ieee80211_txq_schedule_start);
4159 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
4160 struct net_device *dev,
4165 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4166 struct ieee80211_local *local = sdata->local;
4167 struct sta_info *sta;
4168 struct sk_buff *next;
4171 if (unlikely(skb->len < ETH_HLEN)) {
4178 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
4184 if (local->ops->wake_tx_queue) {
4185 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4186 skb_set_queue_mapping(skb, queue);
4190 ieee80211_aggr_check(sdata, sta, skb);
4192 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
4195 struct ieee80211_fast_tx *fast_tx;
4197 fast_tx = rcu_dereference(sta->fast_tx);
4200 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
4204 if (skb_is_gso(skb)) {
4205 struct sk_buff *segs;
4207 segs = skb_gso_segment(skb, 0);
4215 /* we cannot process non-linear frames on this path */
4216 if (skb_linearize(skb))
4219 /* the frame could be fragmented, software-encrypted, and other
4220 * things so we cannot really handle checksum offload with it -
4221 * fix it up in software before we handle anything else.
4223 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4224 skb_set_transport_header(skb,
4225 skb_checksum_start_offset(skb));
4226 if (skb_checksum_help(skb))
4231 skb_list_walk_safe(skb, skb, next) {
4232 skb_mark_not_on_list(skb);
4234 if (skb->protocol == sdata->control_port_protocol)
4235 ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
4237 skb = ieee80211_build_hdr(sdata, skb, info_flags,
4238 sta, ctrl_flags, cookie);
4240 kfree_skb_list(next);
4244 dev_sw_netstats_tx_add(dev, 1, skb->len);
4246 ieee80211_xmit(sdata, sta, skb);
4254 ieee80211_tpt_led_trig_tx(local, len);
4258 static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
4263 err = skb_ensure_writable(skb, ETH_HLEN);
4267 eth = (void *)skb->data;
4268 ether_addr_copy(eth->h_dest, sta->sta.addr);
4273 static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
4274 struct net_device *dev)
4276 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4277 const struct ethhdr *eth = (void *)skb->data;
4278 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
4281 if (likely(!is_multicast_ether_addr(eth->h_dest)))
4284 switch (sdata->vif.type) {
4285 case NL80211_IFTYPE_AP_VLAN:
4286 if (sdata->u.vlan.sta)
4288 if (sdata->wdev.use_4addr)
4291 case NL80211_IFTYPE_AP:
4292 /* check runtime toggle for this bss */
4293 if (!sdata->bss->multicast_to_unicast)
4300 /* multicast to unicast conversion only for some payload */
4301 ethertype = eth->h_proto;
4302 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4303 ethertype = ethvlan->h_vlan_encapsulated_proto;
4304 switch (ethertype) {
4305 case htons(ETH_P_ARP):
4306 case htons(ETH_P_IP):
4307 case htons(ETH_P_IPV6):
4317 ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4318 struct sk_buff_head *queue)
4320 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4321 struct ieee80211_local *local = sdata->local;
4322 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4323 struct sta_info *sta, *first = NULL;
4324 struct sk_buff *cloned_skb;
4328 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4329 if (sdata != sta->sdata)
4330 /* AP-VLAN mismatch */
4332 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4333 /* do not send back to source */
4339 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4342 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4343 dev_kfree_skb(cloned_skb);
4346 __skb_queue_tail(queue, cloned_skb);
4349 if (likely(first)) {
4350 if (unlikely(ieee80211_change_da(skb, first)))
4352 __skb_queue_tail(queue, skb);
4354 /* no STA connected, drop */
4361 __skb_queue_purge(queue);
4362 __skb_queue_tail(queue, skb);
4368 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4369 * @skb: packet to be sent
4370 * @dev: incoming interface
4372 * On failure skb will be freed.
4374 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4375 struct net_device *dev)
4377 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4378 struct sk_buff_head queue;
4380 __skb_queue_head_init(&queue);
4381 ieee80211_convert_to_unicast(skb, dev, &queue);
4382 while ((skb = __skb_dequeue(&queue)))
4383 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4385 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4388 return NETDEV_TX_OK;
4391 static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4392 struct sk_buff *skb, struct sta_info *sta,
4395 struct ieee80211_local *local = sdata->local;
4396 struct ieee80211_tx_control control = {};
4397 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4398 struct ieee80211_sta *pubsta = NULL;
4399 unsigned long flags;
4400 int q = info->hw_queue;
4403 sk_pacing_shift_update(skb->sk, local->hw.tx_sk_pacing_shift);
4405 ieee80211_tpt_led_trig_tx(local, skb->len);
4407 if (ieee80211_queue_skb(local, sdata, sta, skb))
4410 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4412 if (local->queue_stop_reasons[q] ||
4413 (!txpending && !skb_queue_empty(&local->pending[q]))) {
4415 skb_queue_head(&local->pending[q], skb);
4417 skb_queue_tail(&local->pending[q], skb);
4419 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4424 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4426 if (sta && sta->uploaded)
4429 control.sta = pubsta;
4431 drv_tx(local, &control, skb);
4436 static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
4437 struct net_device *dev, struct sta_info *sta,
4438 struct ieee80211_key *key, struct sk_buff *skb)
4440 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4441 struct ieee80211_local *local = sdata->local;
4442 struct tid_ampdu_tx *tid_tx;
4445 if (local->ops->wake_tx_queue) {
4446 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4447 skb_set_queue_mapping(skb, queue);
4451 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) &&
4452 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
4455 memset(info, 0, sizeof(*info));
4457 ieee80211_aggr_check(sdata, sta, skb);
4459 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
4460 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
4462 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
4463 /* fall back to non-offload slow path */
4464 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4468 info->flags |= IEEE80211_TX_CTL_AMPDU;
4469 if (tid_tx->timeout)
4470 tid_tx->last_tx = jiffies;
4473 if (unlikely(skb->sk &&
4474 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS))
4475 info->ack_frame_id = ieee80211_store_ack_skb(local, skb,
4476 &info->flags, NULL);
4478 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
4480 dev_sw_netstats_tx_add(dev, 1, skb->len);
4482 sta->deflink.tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
4483 sta->deflink.tx_stats.packets[skb_get_queue_mapping(skb)]++;
4485 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4486 sdata = container_of(sdata->bss,
4487 struct ieee80211_sub_if_data, u.ap);
4489 info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP;
4490 info->control.vif = &sdata->vif;
4493 info->control.hw_key = &key->conf;
4495 ieee80211_tx_8023(sdata, skb, sta, false);
4503 netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
4504 struct net_device *dev)
4506 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4507 struct ethhdr *ehdr = (struct ethhdr *)skb->data;
4508 struct ieee80211_key *key;
4509 struct sta_info *sta;
4511 if (unlikely(skb->len < ETH_HLEN)) {
4513 return NETDEV_TX_OK;
4518 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4523 if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded ||
4524 !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
4525 sdata->control_port_protocol == ehdr->h_proto))
4528 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4530 key = rcu_dereference(sdata->default_unicast_key);
4532 if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) ||
4533 key->conf.cipher == WLAN_CIPHER_SUITE_TKIP))
4536 ieee80211_8023_xmit(sdata, dev, sta, key, skb);
4540 ieee80211_subif_start_xmit(skb, dev);
4544 return NETDEV_TX_OK;
4548 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4549 struct sk_buff *skb, u32 info_flags)
4551 struct ieee80211_hdr *hdr;
4552 struct ieee80211_tx_data tx = {
4553 .local = sdata->local,
4556 struct sta_info *sta;
4560 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4562 skb = ERR_PTR(-EINVAL);
4566 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0, NULL);
4570 hdr = (void *)skb->data;
4571 tx.sta = sta_info_get(sdata, hdr->addr1);
4574 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4577 return ERR_PTR(-EINVAL);
4586 * ieee80211_clear_tx_pending may not be called in a context where
4587 * it is possible that it packets could come in again.
4589 void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4591 struct sk_buff *skb;
4594 for (i = 0; i < local->hw.queues; i++) {
4595 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4596 ieee80211_free_txskb(&local->hw, skb);
4601 * Returns false if the frame couldn't be transmitted but was queued instead,
4602 * which in this case means re-queued -- take as an indication to stop sending
4603 * more pending frames.
4605 static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4606 struct sk_buff *skb)
4608 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4609 struct ieee80211_sub_if_data *sdata;
4610 struct sta_info *sta;
4611 struct ieee80211_hdr *hdr;
4613 struct ieee80211_chanctx_conf *chanctx_conf;
4615 sdata = vif_to_sdata(info->control.vif);
4617 if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) {
4618 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4619 if (unlikely(!chanctx_conf)) {
4623 info->band = chanctx_conf->def.chan->band;
4624 result = ieee80211_tx(sdata, NULL, skb, true);
4625 } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
4626 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4631 if (IS_ERR(sta) || (sta && !sta->uploaded))
4634 result = ieee80211_tx_8023(sdata, skb, sta, true);
4636 struct sk_buff_head skbs;
4638 __skb_queue_head_init(&skbs);
4639 __skb_queue_tail(&skbs, skb);
4641 hdr = (struct ieee80211_hdr *)skb->data;
4642 sta = sta_info_get(sdata, hdr->addr1);
4644 result = __ieee80211_tx(local, &skbs, sta, true);
4651 * Transmit all pending packets. Called from tasklet.
4653 void ieee80211_tx_pending(struct tasklet_struct *t)
4655 struct ieee80211_local *local = from_tasklet(local, t,
4656 tx_pending_tasklet);
4657 unsigned long flags;
4663 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4664 for (i = 0; i < local->hw.queues; i++) {
4666 * If queue is stopped by something other than due to pending
4667 * frames, or we have no pending frames, proceed to next queue.
4669 if (local->queue_stop_reasons[i] ||
4670 skb_queue_empty(&local->pending[i]))
4673 while (!skb_queue_empty(&local->pending[i])) {
4674 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
4675 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4677 if (WARN_ON(!info->control.vif)) {
4678 ieee80211_free_txskb(&local->hw, skb);
4682 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4685 txok = ieee80211_tx_pending_skb(local, skb);
4686 spin_lock_irqsave(&local->queue_stop_reason_lock,
4692 if (skb_queue_empty(&local->pending[i]))
4693 ieee80211_propagate_queue_wake(local, i);
4695 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4700 /* functions for drivers to get certain frames */
4702 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4703 struct ps_data *ps, struct sk_buff *skb,
4708 int i, have_bits = 0, n1, n2;
4710 /* Generate bitmap for TIM only if there are any STAs in power save
4712 if (atomic_read(&ps->num_sta_ps) > 0)
4713 /* in the hope that this is faster than
4714 * checking byte-for-byte */
4715 have_bits = !bitmap_empty((unsigned long *)ps->tim,
4716 IEEE80211_MAX_AID+1);
4718 if (ps->dtim_count == 0)
4719 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
4724 tim = pos = skb_put(skb, 6);
4725 *pos++ = WLAN_EID_TIM;
4727 *pos++ = ps->dtim_count;
4728 *pos++ = sdata->vif.bss_conf.dtim_period;
4730 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
4733 ps->dtim_bc_mc = aid0 == 1;
4736 /* Find largest even number N1 so that bits numbered 1 through
4737 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4738 * (N2 + 1) x 8 through 2007 are 0. */
4740 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4747 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4754 /* Bitmap control */
4756 /* Part Virt Bitmap */
4757 skb_put(skb, n2 - n1);
4758 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
4760 tim[1] = n2 - n1 + 4;
4762 *pos++ = aid0; /* Bitmap control */
4763 *pos++ = 0; /* Part Virt Bitmap */
4767 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4768 struct ps_data *ps, struct sk_buff *skb,
4771 struct ieee80211_local *local = sdata->local;
4774 * Not very nice, but we want to allow the driver to call
4775 * ieee80211_beacon_get() as a response to the set_tim()
4776 * callback. That, however, is already invoked under the
4777 * sta_lock to guarantee consistent and race-free update
4778 * of the tim bitmap in mac80211 and the driver.
4780 if (local->tim_in_locked_section) {
4781 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4783 spin_lock_bh(&local->tim_lock);
4784 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4785 spin_unlock_bh(&local->tim_lock);
4791 static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
4792 struct beacon_data *beacon)
4794 u8 *beacon_data, count, max_count = 1;
4795 struct probe_resp *resp;
4796 size_t beacon_data_len;
4800 switch (sdata->vif.type) {
4801 case NL80211_IFTYPE_AP:
4802 beacon_data = beacon->tail;
4803 beacon_data_len = beacon->tail_len;
4805 case NL80211_IFTYPE_ADHOC:
4806 beacon_data = beacon->head;
4807 beacon_data_len = beacon->head_len;
4809 case NL80211_IFTYPE_MESH_POINT:
4810 beacon_data = beacon->head;
4811 beacon_data_len = beacon->head_len;
4818 resp = rcu_dereference(sdata->u.ap.probe_resp);
4820 bcn_offsets = beacon->cntdwn_counter_offsets;
4821 count = beacon->cntdwn_current_counter;
4822 if (sdata->vif.csa_active)
4823 max_count = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
4825 for (i = 0; i < max_count; ++i) {
4826 if (bcn_offsets[i]) {
4827 if (WARN_ON_ONCE(bcn_offsets[i] >= beacon_data_len)) {
4831 beacon_data[bcn_offsets[i]] = count;
4834 if (sdata->vif.type == NL80211_IFTYPE_AP && resp) {
4835 u16 *resp_offsets = resp->cntdwn_counter_offsets;
4837 resp->data[resp_offsets[i]] = count;
4843 static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon)
4845 beacon->cntdwn_current_counter--;
4847 /* the counter should never reach 0 */
4848 WARN_ON_ONCE(!beacon->cntdwn_current_counter);
4850 return beacon->cntdwn_current_counter;
4853 u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif)
4855 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4856 struct beacon_data *beacon = NULL;
4861 if (sdata->vif.type == NL80211_IFTYPE_AP)
4862 beacon = rcu_dereference(sdata->u.ap.beacon);
4863 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4864 beacon = rcu_dereference(sdata->u.ibss.presp);
4865 else if (ieee80211_vif_is_mesh(&sdata->vif))
4866 beacon = rcu_dereference(sdata->u.mesh.beacon);
4871 count = __ieee80211_beacon_update_cntdwn(beacon);
4877 EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
4879 void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
4881 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4882 struct beacon_data *beacon = NULL;
4886 if (sdata->vif.type == NL80211_IFTYPE_AP)
4887 beacon = rcu_dereference(sdata->u.ap.beacon);
4888 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4889 beacon = rcu_dereference(sdata->u.ibss.presp);
4890 else if (ieee80211_vif_is_mesh(&sdata->vif))
4891 beacon = rcu_dereference(sdata->u.mesh.beacon);
4896 if (counter < beacon->cntdwn_current_counter)
4897 beacon->cntdwn_current_counter = counter;
4902 EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
4904 bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif)
4906 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4907 struct beacon_data *beacon = NULL;
4909 size_t beacon_data_len;
4912 if (!ieee80211_sdata_running(sdata))
4916 if (vif->type == NL80211_IFTYPE_AP) {
4917 struct ieee80211_if_ap *ap = &sdata->u.ap;
4919 beacon = rcu_dereference(ap->beacon);
4920 if (WARN_ON(!beacon || !beacon->tail))
4922 beacon_data = beacon->tail;
4923 beacon_data_len = beacon->tail_len;
4924 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4925 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4927 beacon = rcu_dereference(ifibss->presp);
4931 beacon_data = beacon->head;
4932 beacon_data_len = beacon->head_len;
4933 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4934 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4936 beacon = rcu_dereference(ifmsh->beacon);
4940 beacon_data = beacon->head;
4941 beacon_data_len = beacon->head_len;
4947 if (!beacon->cntdwn_counter_offsets[0])
4950 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
4953 if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
4961 EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
4963 static int ieee80211_beacon_protect(struct sk_buff *skb,
4964 struct ieee80211_local *local,
4965 struct ieee80211_sub_if_data *sdata)
4967 ieee80211_tx_result res;
4968 struct ieee80211_tx_data tx;
4969 struct sk_buff *check_skb;
4971 memset(&tx, 0, sizeof(tx));
4972 tx.key = rcu_dereference(sdata->default_beacon_key);
4977 __skb_queue_head_init(&tx.skbs);
4978 __skb_queue_tail(&tx.skbs, skb);
4979 res = ieee80211_tx_h_encrypt(&tx);
4980 check_skb = __skb_dequeue(&tx.skbs);
4981 /* we may crash after this, but it'd be a bug in crypto */
4982 WARN_ON(check_skb != skb);
4983 if (WARN_ON_ONCE(res != TX_CONTINUE))
4990 ieee80211_beacon_get_finish(struct ieee80211_hw *hw,
4991 struct ieee80211_vif *vif,
4992 struct ieee80211_mutable_offsets *offs,
4993 struct beacon_data *beacon,
4994 struct sk_buff *skb,
4995 struct ieee80211_chanctx_conf *chanctx_conf,
4998 struct ieee80211_local *local = hw_to_local(hw);
4999 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5000 struct ieee80211_tx_info *info;
5001 enum nl80211_band band;
5002 struct ieee80211_tx_rate_control txrc;
5005 if (offs && beacon) {
5008 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
5009 u16 csa_off = beacon->cntdwn_counter_offsets[i];
5014 offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
5018 band = chanctx_conf->def.chan->band;
5019 info = IEEE80211_SKB_CB(skb);
5020 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5021 info->flags |= IEEE80211_TX_CTL_NO_ACK;
5024 memset(&txrc, 0, sizeof(txrc));
5026 txrc.sband = local->hw.wiphy->bands[band];
5027 txrc.bss_conf = &sdata->vif.bss_conf;
5029 txrc.reported_rate.idx = -1;
5030 if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band])
5031 txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band];
5033 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
5035 rate_control_get_rate(sdata, NULL, &txrc);
5037 info->control.vif = vif;
5038 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
5039 IEEE80211_TX_CTL_ASSIGN_SEQ |
5040 IEEE80211_TX_CTL_FIRST_FRAGMENT;
5044 ieee80211_beacon_add_mbssid(struct sk_buff *skb, struct beacon_data *beacon)
5048 if (!beacon->mbssid_ies)
5051 for (i = 0; i < beacon->mbssid_ies->cnt; i++)
5052 skb_put_data(skb, beacon->mbssid_ies->elem[i].data,
5053 beacon->mbssid_ies->elem[i].len);
5056 static struct sk_buff *
5057 ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
5058 struct ieee80211_vif *vif,
5059 struct ieee80211_mutable_offsets *offs,
5061 struct beacon_data *beacon,
5062 struct ieee80211_chanctx_conf *chanctx_conf)
5064 struct ieee80211_local *local = hw_to_local(hw);
5065 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5066 struct ieee80211_if_ap *ap = &sdata->u.ap;
5067 struct sk_buff *skb = NULL;
5068 u16 csa_off_base = 0;
5071 if (beacon->cntdwn_counter_offsets[0]) {
5073 ieee80211_beacon_update_cntdwn(vif);
5075 ieee80211_set_beacon_cntdwn(sdata, beacon);
5078 /* headroom, head length,
5079 * tail length, maximum TIM length and multiple BSSID length
5081 mbssid_len = ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies);
5082 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
5083 beacon->tail_len + 256 +
5084 local->hw.extra_beacon_tailroom + mbssid_len);
5088 skb_reserve(skb, local->tx_headroom);
5089 skb_put_data(skb, beacon->head, beacon->head_len);
5091 ieee80211_beacon_add_tim(sdata, &ap->ps, skb, is_template);
5094 offs->tim_offset = beacon->head_len;
5095 offs->tim_length = skb->len - beacon->head_len;
5096 offs->cntdwn_counter_offs[0] = beacon->cntdwn_counter_offsets[0];
5099 ieee80211_beacon_add_mbssid(skb, beacon);
5100 offs->mbssid_off = skb->len - mbssid_len;
5103 /* for AP the csa offsets are from tail */
5104 csa_off_base = skb->len;
5108 skb_put_data(skb, beacon->tail, beacon->tail_len);
5110 if (ieee80211_beacon_protect(skb, local, sdata) < 0)
5113 ieee80211_beacon_get_finish(hw, vif, offs, beacon, skb, chanctx_conf,
5118 static struct sk_buff *
5119 __ieee80211_beacon_get(struct ieee80211_hw *hw,
5120 struct ieee80211_vif *vif,
5121 struct ieee80211_mutable_offsets *offs,
5124 struct ieee80211_local *local = hw_to_local(hw);
5125 struct beacon_data *beacon = NULL;
5126 struct sk_buff *skb = NULL;
5127 struct ieee80211_sub_if_data *sdata = NULL;
5128 struct ieee80211_chanctx_conf *chanctx_conf;
5132 sdata = vif_to_sdata(vif);
5133 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5135 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
5139 memset(offs, 0, sizeof(*offs));
5141 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5142 struct ieee80211_if_ap *ap = &sdata->u.ap;
5144 beacon = rcu_dereference(ap->beacon);
5148 skb = ieee80211_beacon_get_ap(hw, vif, offs, is_template,
5149 beacon, chanctx_conf);
5150 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
5151 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
5152 struct ieee80211_hdr *hdr;
5154 beacon = rcu_dereference(ifibss->presp);
5158 if (beacon->cntdwn_counter_offsets[0]) {
5160 __ieee80211_beacon_update_cntdwn(beacon);
5162 ieee80211_set_beacon_cntdwn(sdata, beacon);
5165 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
5166 local->hw.extra_beacon_tailroom);
5169 skb_reserve(skb, local->tx_headroom);
5170 skb_put_data(skb, beacon->head, beacon->head_len);
5172 hdr = (struct ieee80211_hdr *) skb->data;
5173 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5174 IEEE80211_STYPE_BEACON);
5176 ieee80211_beacon_get_finish(hw, vif, offs, beacon, skb,
5178 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5179 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5181 beacon = rcu_dereference(ifmsh->beacon);
5185 if (beacon->cntdwn_counter_offsets[0]) {
5187 /* TODO: For mesh csa_counter is in TU, so
5188 * decrementing it by one isn't correct, but
5189 * for now we leave it consistent with overall
5190 * mac80211's behavior.
5192 __ieee80211_beacon_update_cntdwn(beacon);
5194 ieee80211_set_beacon_cntdwn(sdata, beacon);
5197 if (ifmsh->sync_ops)
5198 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
5200 skb = dev_alloc_skb(local->tx_headroom +
5204 local->hw.extra_beacon_tailroom);
5207 skb_reserve(skb, local->tx_headroom);
5208 skb_put_data(skb, beacon->head, beacon->head_len);
5209 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
5212 offs->tim_offset = beacon->head_len;
5213 offs->tim_length = skb->len - beacon->head_len;
5216 skb_put_data(skb, beacon->tail, beacon->tail_len);
5217 ieee80211_beacon_get_finish(hw, vif, offs, beacon, skb,
5231 ieee80211_beacon_get_template(struct ieee80211_hw *hw,
5232 struct ieee80211_vif *vif,
5233 struct ieee80211_mutable_offsets *offs)
5235 return __ieee80211_beacon_get(hw, vif, offs, true);
5237 EXPORT_SYMBOL(ieee80211_beacon_get_template);
5239 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
5240 struct ieee80211_vif *vif,
5241 u16 *tim_offset, u16 *tim_length)
5243 struct ieee80211_mutable_offsets offs = {};
5244 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
5245 struct sk_buff *copy;
5246 struct ieee80211_supported_band *sband;
5253 *tim_offset = offs.tim_offset;
5256 *tim_length = offs.tim_length;
5258 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
5259 !hw_to_local(hw)->monitors)
5262 /* send a copy to monitor interfaces */
5263 copy = skb_copy(bcn, GFP_ATOMIC);
5267 shift = ieee80211_vif_get_shift(vif);
5268 sband = ieee80211_get_sband(vif_to_sdata(vif));
5272 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false,
5277 EXPORT_SYMBOL(ieee80211_beacon_get_tim);
5279 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
5280 struct ieee80211_vif *vif)
5282 struct ieee80211_if_ap *ap = NULL;
5283 struct sk_buff *skb = NULL;
5284 struct probe_resp *presp = NULL;
5285 struct ieee80211_hdr *hdr;
5286 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5288 if (sdata->vif.type != NL80211_IFTYPE_AP)
5294 presp = rcu_dereference(ap->probe_resp);
5298 skb = dev_alloc_skb(presp->len);
5302 skb_put_data(skb, presp->data, presp->len);
5304 hdr = (struct ieee80211_hdr *) skb->data;
5305 memset(hdr->addr1, 0, sizeof(hdr->addr1));
5311 EXPORT_SYMBOL(ieee80211_proberesp_get);
5313 struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
5314 struct ieee80211_vif *vif)
5316 struct sk_buff *skb = NULL;
5317 struct fils_discovery_data *tmpl = NULL;
5318 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5320 if (sdata->vif.type != NL80211_IFTYPE_AP)
5324 tmpl = rcu_dereference(sdata->u.ap.fils_discovery);
5330 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5332 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5333 skb_put_data(skb, tmpl->data, tmpl->len);
5339 EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
5342 ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
5343 struct ieee80211_vif *vif)
5345 struct sk_buff *skb = NULL;
5346 struct unsol_bcast_probe_resp_data *tmpl = NULL;
5347 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5349 if (sdata->vif.type != NL80211_IFTYPE_AP)
5353 tmpl = rcu_dereference(sdata->u.ap.unsol_bcast_probe_resp);
5359 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5361 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5362 skb_put_data(skb, tmpl->data, tmpl->len);
5368 EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl);
5370 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
5371 struct ieee80211_vif *vif)
5373 struct ieee80211_sub_if_data *sdata;
5374 struct ieee80211_if_managed *ifmgd;
5375 struct ieee80211_pspoll *pspoll;
5376 struct ieee80211_local *local;
5377 struct sk_buff *skb;
5379 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5382 sdata = vif_to_sdata(vif);
5383 ifmgd = &sdata->u.mgd;
5384 local = sdata->local;
5386 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
5390 skb_reserve(skb, local->hw.extra_tx_headroom);
5392 pspoll = skb_put_zero(skb, sizeof(*pspoll));
5393 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
5394 IEEE80211_STYPE_PSPOLL);
5395 pspoll->aid = cpu_to_le16(sdata->vif.bss_conf.aid);
5397 /* aid in PS-Poll has its two MSBs each set to 1 */
5398 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
5400 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
5401 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
5405 EXPORT_SYMBOL(ieee80211_pspoll_get);
5407 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
5408 struct ieee80211_vif *vif,
5411 struct ieee80211_hdr_3addr *nullfunc;
5412 struct ieee80211_sub_if_data *sdata;
5413 struct ieee80211_if_managed *ifmgd;
5414 struct ieee80211_local *local;
5415 struct sk_buff *skb;
5418 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5421 sdata = vif_to_sdata(vif);
5422 ifmgd = &sdata->u.mgd;
5423 local = sdata->local;
5426 struct sta_info *sta;
5429 sta = sta_info_get(sdata, ifmgd->bssid);
5430 qos = sta && sta->sta.wme;
5434 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5435 sizeof(*nullfunc) + 2);
5439 skb_reserve(skb, local->hw.extra_tx_headroom);
5441 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
5442 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
5443 IEEE80211_STYPE_NULLFUNC |
5444 IEEE80211_FCTL_TODS);
5446 __le16 qoshdr = cpu_to_le16(7);
5448 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
5449 IEEE80211_STYPE_NULLFUNC) !=
5450 IEEE80211_STYPE_QOS_NULLFUNC);
5451 nullfunc->frame_control |=
5452 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
5454 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
5455 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
5458 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
5459 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
5460 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
5464 EXPORT_SYMBOL(ieee80211_nullfunc_get);
5466 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
5468 const u8 *ssid, size_t ssid_len,
5471 struct ieee80211_local *local = hw_to_local(hw);
5472 struct ieee80211_hdr_3addr *hdr;
5473 struct sk_buff *skb;
5477 ie_ssid_len = 2 + ssid_len;
5479 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
5480 ie_ssid_len + tailroom);
5484 skb_reserve(skb, local->hw.extra_tx_headroom);
5486 hdr = skb_put_zero(skb, sizeof(*hdr));
5487 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5488 IEEE80211_STYPE_PROBE_REQ);
5489 eth_broadcast_addr(hdr->addr1);
5490 memcpy(hdr->addr2, src_addr, ETH_ALEN);
5491 eth_broadcast_addr(hdr->addr3);
5493 pos = skb_put(skb, ie_ssid_len);
5494 *pos++ = WLAN_EID_SSID;
5497 memcpy(pos, ssid, ssid_len);
5502 EXPORT_SYMBOL(ieee80211_probereq_get);
5504 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5505 const void *frame, size_t frame_len,
5506 const struct ieee80211_tx_info *frame_txctl,
5507 struct ieee80211_rts *rts)
5509 const struct ieee80211_hdr *hdr = frame;
5511 rts->frame_control =
5512 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
5513 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
5515 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
5516 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
5518 EXPORT_SYMBOL(ieee80211_rts_get);
5520 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5521 const void *frame, size_t frame_len,
5522 const struct ieee80211_tx_info *frame_txctl,
5523 struct ieee80211_cts *cts)
5525 const struct ieee80211_hdr *hdr = frame;
5527 cts->frame_control =
5528 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
5529 cts->duration = ieee80211_ctstoself_duration(hw, vif,
5530 frame_len, frame_txctl);
5531 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
5533 EXPORT_SYMBOL(ieee80211_ctstoself_get);
5536 ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
5537 struct ieee80211_vif *vif)
5539 struct ieee80211_local *local = hw_to_local(hw);
5540 struct sk_buff *skb = NULL;
5541 struct ieee80211_tx_data tx;
5542 struct ieee80211_sub_if_data *sdata;
5544 struct ieee80211_tx_info *info;
5545 struct ieee80211_chanctx_conf *chanctx_conf;
5547 sdata = vif_to_sdata(vif);
5550 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5555 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5556 struct beacon_data *beacon =
5557 rcu_dereference(sdata->u.ap.beacon);
5559 if (!beacon || !beacon->head)
5562 ps = &sdata->u.ap.ps;
5563 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5564 ps = &sdata->u.mesh.ps;
5569 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
5570 goto out; /* send buffered bc/mc only after DTIM beacon */
5573 skb = skb_dequeue(&ps->bc_buf);
5576 local->total_ps_buffered--;
5578 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
5579 struct ieee80211_hdr *hdr =
5580 (struct ieee80211_hdr *) skb->data;
5581 /* more buffered multicast/broadcast frames ==> set
5582 * MoreData flag in IEEE 802.11 header to inform PS
5584 hdr->frame_control |=
5585 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5588 if (sdata->vif.type == NL80211_IFTYPE_AP)
5589 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
5590 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
5592 ieee80211_free_txskb(hw, skb);
5595 info = IEEE80211_SKB_CB(skb);
5597 tx.flags |= IEEE80211_TX_PS_BUFFERED;
5598 info->band = chanctx_conf->def.chan->band;
5600 if (invoke_tx_handlers(&tx))
5607 EXPORT_SYMBOL(ieee80211_get_buffered_bc);
5609 int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5611 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5612 struct ieee80211_sub_if_data *sdata = sta->sdata;
5613 struct ieee80211_local *local = sdata->local;
5617 lockdep_assert_held(&local->sta_mtx);
5619 /* only some cases are supported right now */
5620 switch (sdata->vif.type) {
5621 case NL80211_IFTYPE_STATION:
5622 case NL80211_IFTYPE_AP:
5623 case NL80211_IFTYPE_AP_VLAN:
5630 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5633 if (sta->reserved_tid == tid) {
5638 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5639 sdata_err(sdata, "TID reservation already active\n");
5644 ieee80211_stop_vif_queues(sdata->local, sdata,
5645 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5649 /* Tear down BA sessions so we stop aggregating on this TID */
5650 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
5651 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
5652 __ieee80211_stop_tx_ba_session(sta, tid,
5653 AGG_STOP_LOCAL_REQUEST);
5656 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
5657 __ieee80211_flush_queues(local, sdata, queues, false);
5659 sta->reserved_tid = tid;
5661 ieee80211_wake_vif_queues(local, sdata,
5662 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5664 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
5665 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
5671 EXPORT_SYMBOL(ieee80211_reserve_tid);
5673 void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5675 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5676 struct ieee80211_sub_if_data *sdata = sta->sdata;
5678 lockdep_assert_held(&sdata->local->sta_mtx);
5680 /* only some cases are supported right now */
5681 switch (sdata->vif.type) {
5682 case NL80211_IFTYPE_STATION:
5683 case NL80211_IFTYPE_AP:
5684 case NL80211_IFTYPE_AP_VLAN:
5691 if (tid != sta->reserved_tid) {
5692 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
5696 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
5698 EXPORT_SYMBOL(ieee80211_unreserve_tid);
5700 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
5701 struct sk_buff *skb, int tid,
5702 enum nl80211_band band)
5704 int ac = ieee80211_ac_from_tid(tid);
5706 skb_reset_mac_header(skb);
5707 skb_set_queue_mapping(skb, ac);
5708 skb->priority = tid;
5710 skb->dev = sdata->dev;
5713 * The other path calling ieee80211_xmit is from the tasklet,
5714 * and while we can handle concurrent transmissions locking
5715 * requirements are that we do not come into tx with bhs on.
5718 IEEE80211_SKB_CB(skb)->band = band;
5719 ieee80211_xmit(sdata, NULL, skb);
5723 int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
5724 const u8 *buf, size_t len,
5725 const u8 *dest, __be16 proto, bool unencrypted,
5728 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5729 struct ieee80211_local *local = sdata->local;
5730 struct sta_info *sta;
5731 struct sk_buff *skb;
5732 struct ethhdr *ehdr;
5736 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
5737 * or Pre-Authentication
5739 if (proto != sdata->control_port_protocol &&
5740 proto != cpu_to_be16(ETH_P_PREAUTH))
5743 if (proto == sdata->control_port_protocol)
5744 ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
5745 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
5748 flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5751 ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
5753 flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX;
5755 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5756 sizeof(struct ethhdr) + len);
5760 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
5762 skb_put_data(skb, buf, len);
5764 ehdr = skb_push(skb, sizeof(struct ethhdr));
5765 memcpy(ehdr->h_dest, dest, ETH_ALEN);
5766 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
5767 ehdr->h_proto = proto;
5770 skb->protocol = proto;
5771 skb_reset_network_header(skb);
5772 skb_reset_mac_header(skb);
5774 /* update QoS header to prioritize control port frames if possible,
5775 * priorization also happens for control port frames send over
5780 if (ieee80211_lookup_ra_sta(sdata, skb, &sta) == 0 && !IS_ERR(sta)) {
5781 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
5783 skb_set_queue_mapping(skb, queue);
5789 /* mutex lock is only needed for incrementing the cookie counter */
5790 mutex_lock(&local->mtx);
5793 __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags, cookie);
5796 mutex_unlock(&local->mtx);
5801 int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
5802 const u8 *buf, size_t len)
5804 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5805 struct ieee80211_local *local = sdata->local;
5806 struct sk_buff *skb;
5808 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
5809 30 + /* header size */
5810 18); /* 11s header size */
5814 skb_reserve(skb, local->hw.extra_tx_headroom);
5815 skb_put_data(skb, buf, len);
5818 skb->protocol = htons(ETH_P_802_3);
5819 skb_reset_network_header(skb);
5820 skb_reset_mac_header(skb);
5823 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
5824 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP,