1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2018-2020 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 <net/net_namespace.h>
22 #include <net/ieee80211_radiotap.h>
23 #include <net/cfg80211.h>
24 #include <net/mac80211.h>
25 #include <net/codel.h>
26 #include <net/codel_impl.h>
27 #include <asm/unaligned.h>
28 #include <net/fq_impl.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
41 static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
42 struct sk_buff *skb, int group_addr,
45 int rate, mrate, erp, dur, i, shift = 0;
46 struct ieee80211_rate *txrate;
47 struct ieee80211_local *local = tx->local;
48 struct ieee80211_supported_band *sband;
49 struct ieee80211_hdr *hdr;
50 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
51 struct ieee80211_chanctx_conf *chanctx_conf;
54 /* assume HW handles this */
55 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
59 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
61 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
62 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
67 if (WARN_ON_ONCE(tx->rate.idx < 0))
70 sband = local->hw.wiphy->bands[info->band];
71 txrate = &sband->bitrates[tx->rate.idx];
73 erp = txrate->flags & IEEE80211_RATE_ERP_G;
75 /* device is expected to do this */
76 if (sband->band == NL80211_BAND_S1GHZ)
80 * data and mgmt (except PS Poll):
82 * - during contention period:
83 * if addr1 is group address: 0
84 * if more fragments = 0 and addr1 is individual address: time to
85 * transmit one ACK plus SIFS
86 * if more fragments = 1 and addr1 is individual address: time to
87 * transmit next fragment plus 2 x ACK plus 3 x SIFS
90 * - control response frame (CTS or ACK) shall be transmitted using the
91 * same rate as the immediately previous frame in the frame exchange
92 * sequence, if this rate belongs to the PHY mandatory rates, or else
93 * at the highest possible rate belonging to the PHY rates in the
96 hdr = (struct ieee80211_hdr *)skb->data;
97 if (ieee80211_is_ctl(hdr->frame_control)) {
98 /* TODO: These control frames are not currently sent by
99 * mac80211, but should they be implemented, this function
100 * needs to be updated to support duration field calculation.
102 * RTS: time needed to transmit pending data/mgmt frame plus
103 * one CTS frame plus one ACK frame plus 3 x SIFS
104 * CTS: duration of immediately previous RTS minus time
105 * required to transmit CTS and its SIFS
106 * ACK: 0 if immediately previous directed data/mgmt had
107 * more=0, with more=1 duration in ACK frame is duration
108 * from previous frame minus time needed to transmit ACK
110 * PS Poll: BIT(15) | BIT(14) | aid
116 if (0 /* FIX: data/mgmt during CFP */)
117 return cpu_to_le16(32768);
119 if (group_addr) /* Group address as the destination - no ACK */
122 /* Individual destination address:
123 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
124 * CTS and ACK frames shall be transmitted using the highest rate in
125 * basic rate set that is less than or equal to the rate of the
126 * immediately previous frame and that is using the same modulation
127 * (CCK or OFDM). If no basic rate set matches with these requirements,
128 * the highest mandatory rate of the PHY that is less than or equal to
129 * the rate of the previous frame is used.
130 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
133 /* use lowest available if everything fails */
134 mrate = sband->bitrates[0].bitrate;
135 for (i = 0; i < sband->n_bitrates; i++) {
136 struct ieee80211_rate *r = &sband->bitrates[i];
138 if (r->bitrate > txrate->bitrate)
141 if ((rate_flags & r->flags) != rate_flags)
144 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
145 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
147 switch (sband->band) {
148 case NL80211_BAND_2GHZ: {
150 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
151 flag = IEEE80211_RATE_MANDATORY_G;
153 flag = IEEE80211_RATE_MANDATORY_B;
158 case NL80211_BAND_5GHZ:
159 case NL80211_BAND_6GHZ:
160 if (r->flags & IEEE80211_RATE_MANDATORY_A)
163 case NL80211_BAND_S1GHZ:
164 case NL80211_BAND_60GHZ:
165 /* TODO, for now fall through */
166 case NUM_NL80211_BANDS:
172 /* No matching basic rate found; use highest suitable mandatory
174 rate = DIV_ROUND_UP(mrate, 1 << shift);
177 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
178 if (ieee80211_is_data_qos(hdr->frame_control) &&
179 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
182 /* Time needed to transmit ACK
183 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
184 * to closest integer */
185 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
186 tx->sdata->vif.bss_conf.use_short_preamble,
190 /* Frame is fragmented: duration increases with time needed to
191 * transmit next fragment plus ACK and 2 x SIFS. */
192 dur *= 2; /* ACK + SIFS */
194 dur += ieee80211_frame_duration(sband->band, next_frag_len,
195 txrate->bitrate, erp,
196 tx->sdata->vif.bss_conf.use_short_preamble,
200 return cpu_to_le16(dur);
204 static ieee80211_tx_result debug_noinline
205 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
207 struct ieee80211_local *local = tx->local;
208 struct ieee80211_if_managed *ifmgd;
209 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
211 /* driver doesn't support power save */
212 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
215 /* hardware does dynamic power save */
216 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
219 /* dynamic power save disabled */
220 if (local->hw.conf.dynamic_ps_timeout <= 0)
223 /* we are scanning, don't enable power save */
227 if (!local->ps_sdata)
230 /* No point if we're going to suspend */
231 if (local->quiescing)
234 /* dynamic ps is supported only in managed mode */
235 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
238 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
241 ifmgd = &tx->sdata->u.mgd;
244 * Don't wakeup from power save if u-apsd is enabled, voip ac has
245 * u-apsd enabled and the frame is in voip class. This effectively
246 * means that even if all access categories have u-apsd enabled, in
247 * practise u-apsd is only used with the voip ac. This is a
248 * workaround for the case when received voip class packets do not
249 * have correct qos tag for some reason, due the network or the
252 * Note: ifmgd->uapsd_queues access is racy here. If the value is
253 * changed via debugfs, user needs to reassociate manually to have
254 * everything in sync.
256 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
257 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
258 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
261 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
262 ieee80211_stop_queues_by_reason(&local->hw,
263 IEEE80211_MAX_QUEUE_MAP,
264 IEEE80211_QUEUE_STOP_REASON_PS,
266 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
267 ieee80211_queue_work(&local->hw,
268 &local->dynamic_ps_disable_work);
271 /* Don't restart the timer if we're not disassociated */
272 if (!ifmgd->associated)
275 mod_timer(&local->dynamic_ps_timer, jiffies +
276 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
281 static ieee80211_tx_result debug_noinline
282 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
285 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
286 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
289 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
292 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
293 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
294 !ieee80211_is_probe_req(hdr->frame_control) &&
295 !ieee80211_is_any_nullfunc(hdr->frame_control))
297 * When software scanning only nullfunc frames (to notify
298 * the sleep state to the AP) and probe requests (for the
299 * active scan) are allowed, all other frames should not be
300 * sent and we should not get here, but if we do
301 * nonetheless, drop them to avoid sending them
302 * off-channel. See the link below and
303 * ieee80211_start_scan() for more.
305 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
309 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
312 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
316 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
318 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
319 if (unlikely(!assoc &&
320 ieee80211_is_data(hdr->frame_control))) {
321 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
322 sdata_info(tx->sdata,
323 "dropped data frame to not associated station %pM\n",
326 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
329 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
330 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
332 * No associated STAs - no need to send multicast
341 /* This function is called whenever the AP is about to exceed the maximum limit
342 * of buffered frames for power saving STAs. This situation should not really
343 * happen often during normal operation, so dropping the oldest buffered packet
344 * from each queue should be OK to make some room for new frames. */
345 static void purge_old_ps_buffers(struct ieee80211_local *local)
347 int total = 0, purged = 0;
349 struct ieee80211_sub_if_data *sdata;
350 struct sta_info *sta;
352 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
355 if (sdata->vif.type == NL80211_IFTYPE_AP)
356 ps = &sdata->u.ap.ps;
357 else if (ieee80211_vif_is_mesh(&sdata->vif))
358 ps = &sdata->u.mesh.ps;
362 skb = skb_dequeue(&ps->bc_buf);
365 ieee80211_free_txskb(&local->hw, skb);
367 total += skb_queue_len(&ps->bc_buf);
371 * Drop one frame from each station from the lowest-priority
372 * AC that has frames at all.
374 list_for_each_entry_rcu(sta, &local->sta_list, list) {
377 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
378 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
379 total += skb_queue_len(&sta->ps_tx_buf[ac]);
382 ieee80211_free_txskb(&local->hw, skb);
388 local->total_ps_buffered = total;
389 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
392 static ieee80211_tx_result
393 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
395 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
396 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
400 * broadcast/multicast frame
402 * If any of the associated/peer stations is in power save mode,
403 * the frame is buffered to be sent after DTIM beacon frame.
404 * This is done either by the hardware or us.
407 /* powersaving STAs currently only in AP/VLAN/mesh mode */
408 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
409 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
413 ps = &tx->sdata->bss->ps;
414 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
415 ps = &tx->sdata->u.mesh.ps;
421 /* no buffering for ordered frames */
422 if (ieee80211_has_order(hdr->frame_control))
425 if (ieee80211_is_probe_req(hdr->frame_control))
428 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
429 info->hw_queue = tx->sdata->vif.cab_queue;
431 /* no stations in PS mode and no buffered packets */
432 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
435 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
437 /* device releases frame after DTIM beacon */
438 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
441 /* buffered in mac80211 */
442 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
443 purge_old_ps_buffers(tx->local);
445 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
447 "BC TX buffer full - dropping the oldest frame\n");
448 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
450 tx->local->total_ps_buffered++;
452 skb_queue_tail(&ps->bc_buf, tx->skb);
457 static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
460 if (!ieee80211_is_mgmt(fc))
463 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
466 if (!ieee80211_is_robust_mgmt_frame(skb))
472 static ieee80211_tx_result
473 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
475 struct sta_info *sta = tx->sta;
476 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
477 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
478 struct ieee80211_local *local = tx->local;
483 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
484 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
485 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
486 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
487 int ac = skb_get_queue_mapping(tx->skb);
489 if (ieee80211_is_mgmt(hdr->frame_control) &&
490 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
491 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
495 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
496 sta->sta.addr, sta->sta.aid, ac);
497 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
498 purge_old_ps_buffers(tx->local);
500 /* sync with ieee80211_sta_ps_deliver_wakeup */
501 spin_lock(&sta->ps_lock);
503 * STA woke up the meantime and all the frames on ps_tx_buf have
504 * been queued to pending queue. No reordering can happen, go
505 * ahead and Tx the packet.
507 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
508 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
509 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
510 spin_unlock(&sta->ps_lock);
514 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
515 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
517 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
519 ieee80211_free_txskb(&local->hw, old);
521 tx->local->total_ps_buffered++;
523 info->control.jiffies = jiffies;
524 info->control.vif = &tx->sdata->vif;
525 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
526 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
527 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
528 spin_unlock(&sta->ps_lock);
530 if (!timer_pending(&local->sta_cleanup))
531 mod_timer(&local->sta_cleanup,
532 round_jiffies(jiffies +
533 STA_INFO_CLEANUP_INTERVAL));
536 * We queued up some frames, so the TIM bit might
537 * need to be set, recalculate it.
539 sta_info_recalc_tim(sta);
542 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
544 "STA %pM in PS mode, but polling/in SP -> send frame\n",
551 static ieee80211_tx_result debug_noinline
552 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
554 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
557 if (tx->flags & IEEE80211_TX_UNICAST)
558 return ieee80211_tx_h_unicast_ps_buf(tx);
560 return ieee80211_tx_h_multicast_ps_buf(tx);
563 static ieee80211_tx_result debug_noinline
564 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
566 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
568 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
569 if (tx->sdata->control_port_no_encrypt)
570 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
571 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
572 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
578 static ieee80211_tx_result debug_noinline
579 ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
581 struct ieee80211_key *key;
582 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
583 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
585 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
591 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
593 else if (ieee80211_is_group_privacy_action(tx->skb) &&
594 (key = rcu_dereference(tx->sdata->default_multicast_key)))
596 else if (ieee80211_is_mgmt(hdr->frame_control) &&
597 is_multicast_ether_addr(hdr->addr1) &&
598 ieee80211_is_robust_mgmt_frame(tx->skb) &&
599 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
601 else if (is_multicast_ether_addr(hdr->addr1) &&
602 (key = rcu_dereference(tx->sdata->default_multicast_key)))
604 else if (!is_multicast_ether_addr(hdr->addr1) &&
605 (key = rcu_dereference(tx->sdata->default_unicast_key)))
611 bool skip_hw = false;
613 /* TODO: add threshold stuff again */
615 switch (tx->key->conf.cipher) {
616 case WLAN_CIPHER_SUITE_WEP40:
617 case WLAN_CIPHER_SUITE_WEP104:
618 case WLAN_CIPHER_SUITE_TKIP:
619 if (!ieee80211_is_data_present(hdr->frame_control))
622 case WLAN_CIPHER_SUITE_CCMP:
623 case WLAN_CIPHER_SUITE_CCMP_256:
624 case WLAN_CIPHER_SUITE_GCMP:
625 case WLAN_CIPHER_SUITE_GCMP_256:
626 if (!ieee80211_is_data_present(hdr->frame_control) &&
627 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
629 !ieee80211_is_group_privacy_action(tx->skb))
632 skip_hw = (tx->key->conf.flags &
633 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
634 ieee80211_is_mgmt(hdr->frame_control);
636 case WLAN_CIPHER_SUITE_AES_CMAC:
637 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
638 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
639 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
640 if (!ieee80211_is_mgmt(hdr->frame_control))
645 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
646 !ieee80211_is_deauth(hdr->frame_control)))
649 if (!skip_hw && tx->key &&
650 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
651 info->control.hw_key = &tx->key->conf;
652 } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta &&
653 test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) {
660 static ieee80211_tx_result debug_noinline
661 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
664 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
665 struct ieee80211_supported_band *sband;
667 struct ieee80211_tx_rate_control txrc;
668 struct ieee80211_sta_rates *ratetbl = NULL;
671 memset(&txrc, 0, sizeof(txrc));
673 sband = tx->local->hw.wiphy->bands[info->band];
675 len = min_t(u32, tx->skb->len + FCS_LEN,
676 tx->local->hw.wiphy->frag_threshold);
678 /* set up the tx rate control struct we give the RC algo */
679 txrc.hw = &tx->local->hw;
681 txrc.bss_conf = &tx->sdata->vif.bss_conf;
683 txrc.reported_rate.idx = -1;
684 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
686 if (tx->sdata->rc_has_mcs_mask[info->band])
687 txrc.rate_idx_mcs_mask =
688 tx->sdata->rc_rateidx_mcs_mask[info->band];
690 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
691 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
692 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
693 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
695 /* set up RTS protection if desired */
696 if (len > tx->local->hw.wiphy->rts_threshold) {
700 info->control.use_rts = txrc.rts;
701 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
704 * Use short preamble if the BSS can handle it, but not for
705 * management frames unless we know the receiver can handle
706 * that -- the management frame might be to a station that
707 * just wants a probe response.
709 if (tx->sdata->vif.bss_conf.use_short_preamble &&
710 (ieee80211_is_data(hdr->frame_control) ||
711 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
712 txrc.short_preamble = true;
714 info->control.short_preamble = txrc.short_preamble;
716 /* don't ask rate control when rate already injected via radiotap */
717 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
721 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
724 * Lets not bother rate control if we're associated and cannot
725 * talk to the sta. This should not happen.
727 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
728 !rate_usable_index_exists(sband, &tx->sta->sta),
729 "%s: Dropped data frame as no usable bitrate found while "
730 "scanning and associated. Target station: "
731 "%pM on %d GHz band\n",
732 tx->sdata->name, hdr->addr1,
737 * If we're associated with the sta at this point we know we can at
738 * least send the frame at the lowest bit rate.
740 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
742 if (tx->sta && !info->control.skip_table)
743 ratetbl = rcu_dereference(tx->sta->sta.rates);
745 if (unlikely(info->control.rates[0].idx < 0)) {
747 struct ieee80211_tx_rate rate = {
748 .idx = ratetbl->rate[0].idx,
749 .flags = ratetbl->rate[0].flags,
750 .count = ratetbl->rate[0].count
753 if (ratetbl->rate[0].idx < 0)
761 tx->rate = info->control.rates[0];
764 if (txrc.reported_rate.idx < 0) {
765 txrc.reported_rate = tx->rate;
766 if (tx->sta && ieee80211_is_data(hdr->frame_control))
767 tx->sta->tx_stats.last_rate = txrc.reported_rate;
769 tx->sta->tx_stats.last_rate = txrc.reported_rate;
774 if (unlikely(!info->control.rates[0].count))
775 info->control.rates[0].count = 1;
777 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
778 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
779 info->control.rates[0].count = 1;
784 static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
786 u16 *seq = &sta->tid_seq[tid];
787 __le16 ret = cpu_to_le16(*seq);
789 /* Increase the sequence number. */
790 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
795 static ieee80211_tx_result debug_noinline
796 ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
798 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
799 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
803 * Packet injection may want to control the sequence
804 * number, if we have no matching interface then we
805 * neither assign one ourselves nor ask the driver to.
807 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
810 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
813 if (ieee80211_hdrlen(hdr->frame_control) < 24)
816 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
819 if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
823 * Anything but QoS data that has a sequence number field
824 * (is long enough) gets a sequence number from the global
825 * counter. QoS data frames with a multicast destination
826 * also use the global counter (802.11-2012 9.3.2.10).
828 if (!ieee80211_is_data_qos(hdr->frame_control) ||
829 is_multicast_ether_addr(hdr->addr1)) {
830 /* driver should assign sequence number */
831 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
832 /* for pure STA mode without beacons, we can do it */
833 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
834 tx->sdata->sequence_number += 0x10;
836 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
841 * This should be true for injected/management frames only, for
842 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
843 * above since they are not QoS-data frames.
848 /* include per-STA, per-TID sequence counter */
849 tid = ieee80211_get_tid(hdr);
850 tx->sta->tx_stats.msdu[tid]++;
852 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
857 static int ieee80211_fragment(struct ieee80211_tx_data *tx,
858 struct sk_buff *skb, int hdrlen,
861 struct ieee80211_local *local = tx->local;
862 struct ieee80211_tx_info *info;
864 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
865 int pos = hdrlen + per_fragm;
866 int rem = skb->len - hdrlen - per_fragm;
868 if (WARN_ON(rem < 0))
871 /* first fragment was already added to queue by caller */
874 int fraglen = per_fragm;
879 tmp = dev_alloc_skb(local->tx_headroom +
881 tx->sdata->encrypt_headroom +
882 IEEE80211_ENCRYPT_TAILROOM);
886 __skb_queue_tail(&tx->skbs, tmp);
889 local->tx_headroom + tx->sdata->encrypt_headroom);
891 /* copy control information */
892 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
894 info = IEEE80211_SKB_CB(tmp);
895 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
896 IEEE80211_TX_CTL_FIRST_FRAGMENT);
899 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
901 skb_copy_queue_mapping(tmp, skb);
902 tmp->priority = skb->priority;
905 /* copy header and data */
906 skb_put_data(tmp, skb->data, hdrlen);
907 skb_put_data(tmp, skb->data + pos, fraglen);
912 /* adjust first fragment's length */
913 skb_trim(skb, hdrlen + per_fragm);
917 static ieee80211_tx_result debug_noinline
918 ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
920 struct sk_buff *skb = tx->skb;
921 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
922 struct ieee80211_hdr *hdr = (void *)skb->data;
923 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
927 /* no matter what happens, tx->skb moves to tx->skbs */
928 __skb_queue_tail(&tx->skbs, skb);
931 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
934 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
938 * Warn when submitting a fragmented A-MPDU frame and drop it.
939 * This scenario is handled in ieee80211_tx_prepare but extra
940 * caution taken here as fragmented ampdu may cause Tx stop.
942 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
945 hdrlen = ieee80211_hdrlen(hdr->frame_control);
947 /* internal error, why isn't DONTFRAG set? */
948 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
952 * Now fragment the frame. This will allocate all the fragments and
953 * chain them (using skb as the first fragment) to skb->next.
954 * During transmission, we will remove the successfully transmitted
955 * fragments from this list. When the low-level driver rejects one
956 * of the fragments then we will simply pretend to accept the skb
957 * but store it away as pending.
959 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
962 /* update duration/seq/flags of fragments */
965 skb_queue_walk(&tx->skbs, skb) {
966 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
968 hdr = (void *)skb->data;
969 info = IEEE80211_SKB_CB(skb);
971 if (!skb_queue_is_last(&tx->skbs, skb)) {
972 hdr->frame_control |= morefrags;
974 * No multi-rate retries for fragmented frames, that
975 * would completely throw off the NAV at other STAs.
977 info->control.rates[1].idx = -1;
978 info->control.rates[2].idx = -1;
979 info->control.rates[3].idx = -1;
980 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
981 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
983 hdr->frame_control &= ~morefrags;
985 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
992 static ieee80211_tx_result debug_noinline
993 ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1001 skb_queue_walk(&tx->skbs, skb) {
1002 ac = skb_get_queue_mapping(skb);
1003 tx->sta->tx_stats.bytes[ac] += skb->len;
1006 tx->sta->tx_stats.packets[ac]++;
1011 static ieee80211_tx_result debug_noinline
1012 ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1017 switch (tx->key->conf.cipher) {
1018 case WLAN_CIPHER_SUITE_WEP40:
1019 case WLAN_CIPHER_SUITE_WEP104:
1020 return ieee80211_crypto_wep_encrypt(tx);
1021 case WLAN_CIPHER_SUITE_TKIP:
1022 return ieee80211_crypto_tkip_encrypt(tx);
1023 case WLAN_CIPHER_SUITE_CCMP:
1024 return ieee80211_crypto_ccmp_encrypt(
1025 tx, IEEE80211_CCMP_MIC_LEN);
1026 case WLAN_CIPHER_SUITE_CCMP_256:
1027 return ieee80211_crypto_ccmp_encrypt(
1028 tx, IEEE80211_CCMP_256_MIC_LEN);
1029 case WLAN_CIPHER_SUITE_AES_CMAC:
1030 return ieee80211_crypto_aes_cmac_encrypt(tx);
1031 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1032 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
1033 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1034 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1035 return ieee80211_crypto_aes_gmac_encrypt(tx);
1036 case WLAN_CIPHER_SUITE_GCMP:
1037 case WLAN_CIPHER_SUITE_GCMP_256:
1038 return ieee80211_crypto_gcmp_encrypt(tx);
1040 return ieee80211_crypto_hw_encrypt(tx);
1046 static ieee80211_tx_result debug_noinline
1047 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1049 struct sk_buff *skb;
1050 struct ieee80211_hdr *hdr;
1054 skb_queue_walk(&tx->skbs, skb) {
1055 hdr = (void *) skb->data;
1056 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1057 break; /* must not overwrite AID */
1058 if (!skb_queue_is_last(&tx->skbs, skb)) {
1059 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1060 next_len = next->len;
1063 group_addr = is_multicast_ether_addr(hdr->addr1);
1066 ieee80211_duration(tx, skb, group_addr, next_len);
1072 /* actual transmit path */
1074 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1075 struct sk_buff *skb,
1076 struct ieee80211_tx_info *info,
1077 struct tid_ampdu_tx *tid_tx,
1080 bool queued = false;
1081 bool reset_agg_timer = false;
1082 struct sk_buff *purge_skb = NULL;
1084 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1085 info->flags |= IEEE80211_TX_CTL_AMPDU;
1086 reset_agg_timer = true;
1087 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1089 * nothing -- this aggregation session is being started
1090 * but that might still fail with the driver
1092 } else if (!tx->sta->sta.txq[tid]) {
1093 spin_lock(&tx->sta->lock);
1095 * Need to re-check now, because we may get here
1097 * 1) in the window during which the setup is actually
1098 * already done, but not marked yet because not all
1099 * packets are spliced over to the driver pending
1100 * queue yet -- if this happened we acquire the lock
1101 * either before or after the splice happens, but
1102 * need to recheck which of these cases happened.
1104 * 2) during session teardown, if the OPERATIONAL bit
1105 * was cleared due to the teardown but the pointer
1106 * hasn't been assigned NULL yet (or we loaded it
1107 * before it was assigned) -- in this case it may
1108 * now be NULL which means we should just let the
1109 * packet pass through because splicing the frames
1110 * back is already done.
1112 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1115 /* do nothing, let packet pass through */
1116 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1117 info->flags |= IEEE80211_TX_CTL_AMPDU;
1118 reset_agg_timer = true;
1121 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1122 clear_sta_flag(tx->sta, WLAN_STA_SP);
1123 ps_dbg(tx->sta->sdata,
1124 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1125 tx->sta->sta.addr, tx->sta->sta.aid);
1127 info->control.vif = &tx->sdata->vif;
1128 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1129 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
1130 __skb_queue_tail(&tid_tx->pending, skb);
1131 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1132 purge_skb = __skb_dequeue(&tid_tx->pending);
1134 spin_unlock(&tx->sta->lock);
1137 ieee80211_free_txskb(&tx->local->hw, purge_skb);
1140 /* reset session timer */
1141 if (reset_agg_timer)
1142 tid_tx->last_tx = jiffies;
1149 * pass %NULL for the station if unknown, a valid pointer if known
1150 * or an ERR_PTR() if the station is known not to exist
1152 static ieee80211_tx_result
1153 ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1154 struct ieee80211_tx_data *tx,
1155 struct sta_info *sta, struct sk_buff *skb)
1157 struct ieee80211_local *local = sdata->local;
1158 struct ieee80211_hdr *hdr;
1159 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1162 memset(tx, 0, sizeof(*tx));
1166 __skb_queue_head_init(&tx->skbs);
1169 * If this flag is set to true anywhere, and we get here,
1170 * we are doing the needed processing, so remove the flag
1173 info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1175 hdr = (struct ieee80211_hdr *) skb->data;
1181 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1182 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1183 if (!tx->sta && sdata->wdev.use_4addr)
1185 } else if (tx->sdata->control_port_protocol == tx->skb->protocol) {
1186 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1188 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1189 tx->sta = sta_info_get(sdata, hdr->addr1);
1192 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
1193 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
1194 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1195 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1196 struct tid_ampdu_tx *tid_tx;
1198 tid = ieee80211_get_tid(hdr);
1200 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1204 queued = ieee80211_tx_prep_agg(tx, skb, info,
1207 if (unlikely(queued))
1212 if (is_multicast_ether_addr(hdr->addr1)) {
1213 tx->flags &= ~IEEE80211_TX_UNICAST;
1214 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1216 tx->flags |= IEEE80211_TX_UNICAST;
1218 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1219 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1220 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1221 info->flags & IEEE80211_TX_CTL_AMPDU)
1222 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1226 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1227 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
1228 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1229 ieee80211_check_fast_xmit(tx->sta);
1232 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1237 static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1238 struct ieee80211_vif *vif,
1239 struct sta_info *sta,
1240 struct sk_buff *skb)
1242 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1243 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1244 struct ieee80211_txq *txq = NULL;
1246 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1247 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1250 if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
1251 unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1252 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
1253 ieee80211_is_bufferable_mmpdu(hdr->frame_control) ||
1254 vif->type == NL80211_IFTYPE_STATION) &&
1255 sta && sta->uploaded) {
1257 * This will be NULL if the driver didn't set the
1258 * opt-in hardware flag.
1260 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1263 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1268 txq = sta->sta.txq[tid];
1276 return to_txq_info(txq);
1279 static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1281 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1284 static u32 codel_skb_len_func(const struct sk_buff *skb)
1289 static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1291 const struct ieee80211_tx_info *info;
1293 info = (const struct ieee80211_tx_info *)skb->cb;
1294 return info->control.enqueue_time;
1297 static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1300 struct ieee80211_local *local;
1301 struct txq_info *txqi;
1303 struct fq_flow *flow;
1306 local = vif_to_sdata(txqi->txq.vif)->local;
1309 if (cvars == &txqi->def_cvars)
1310 flow = &txqi->tin.default_flow;
1312 flow = &fq->flows[cvars - local->cvars];
1314 return fq_flow_dequeue(fq, flow);
1317 static void codel_drop_func(struct sk_buff *skb,
1320 struct ieee80211_local *local;
1321 struct ieee80211_hw *hw;
1322 struct txq_info *txqi;
1325 local = vif_to_sdata(txqi->txq.vif)->local;
1328 ieee80211_free_txskb(hw, skb);
1331 static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1333 struct fq_flow *flow)
1335 struct ieee80211_local *local;
1336 struct txq_info *txqi;
1337 struct codel_vars *cvars;
1338 struct codel_params *cparams;
1339 struct codel_stats *cstats;
1341 local = container_of(fq, struct ieee80211_local, fq);
1342 txqi = container_of(tin, struct txq_info, tin);
1343 cstats = &txqi->cstats;
1345 if (txqi->txq.sta) {
1346 struct sta_info *sta = container_of(txqi->txq.sta,
1347 struct sta_info, sta);
1348 cparams = &sta->cparams;
1350 cparams = &local->cparams;
1353 if (flow == &tin->default_flow)
1354 cvars = &txqi->def_cvars;
1356 cvars = &local->cvars[flow - fq->flows];
1358 return codel_dequeue(txqi,
1364 codel_skb_time_func,
1366 codel_dequeue_func);
1369 static void fq_skb_free_func(struct fq *fq,
1371 struct fq_flow *flow,
1372 struct sk_buff *skb)
1374 struct ieee80211_local *local;
1376 local = container_of(fq, struct ieee80211_local, fq);
1377 ieee80211_free_txskb(&local->hw, skb);
1380 static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1381 struct txq_info *txqi,
1382 struct sk_buff *skb)
1384 struct fq *fq = &local->fq;
1385 struct fq_tin *tin = &txqi->tin;
1386 u32 flow_idx = fq_flow_idx(fq, skb);
1388 ieee80211_set_skb_enqueue_time(skb);
1390 spin_lock_bh(&fq->lock);
1391 fq_tin_enqueue(fq, tin, flow_idx, skb,
1393 spin_unlock_bh(&fq->lock);
1396 static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1397 struct fq_flow *flow, struct sk_buff *skb,
1400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1402 return info->control.vif == data;
1405 void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1406 struct ieee80211_sub_if_data *sdata)
1408 struct fq *fq = &local->fq;
1409 struct txq_info *txqi;
1411 struct ieee80211_sub_if_data *ap;
1413 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1416 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1421 txqi = to_txq_info(ap->vif.txq);
1424 spin_lock_bh(&fq->lock);
1425 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1427 spin_unlock_bh(&fq->lock);
1430 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1431 struct sta_info *sta,
1432 struct txq_info *txqi, int tid)
1434 fq_tin_init(&txqi->tin);
1435 codel_vars_init(&txqi->def_cvars);
1436 codel_stats_init(&txqi->cstats);
1437 __skb_queue_head_init(&txqi->frags);
1438 INIT_LIST_HEAD(&txqi->schedule_order);
1440 txqi->txq.vif = &sdata->vif;
1443 sdata->vif.txq = &txqi->txq;
1445 txqi->txq.ac = IEEE80211_AC_BE;
1450 if (tid == IEEE80211_NUM_TIDS) {
1451 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1452 /* Drivers need to opt in to the management MPDU TXQ */
1453 if (!ieee80211_hw_check(&sdata->local->hw,
1456 } else if (!ieee80211_hw_check(&sdata->local->hw,
1458 /* Drivers need to opt in to the bufferable MMPDU TXQ */
1461 txqi->txq.ac = IEEE80211_AC_VO;
1463 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1466 txqi->txq.sta = &sta->sta;
1467 txqi->txq.tid = tid;
1468 sta->sta.txq[tid] = &txqi->txq;
1471 void ieee80211_txq_purge(struct ieee80211_local *local,
1472 struct txq_info *txqi)
1474 struct fq *fq = &local->fq;
1475 struct fq_tin *tin = &txqi->tin;
1477 spin_lock_bh(&fq->lock);
1478 fq_tin_reset(fq, tin, fq_skb_free_func);
1479 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
1480 spin_unlock_bh(&fq->lock);
1482 spin_lock_bh(&local->active_txq_lock[txqi->txq.ac]);
1483 list_del_init(&txqi->schedule_order);
1484 spin_unlock_bh(&local->active_txq_lock[txqi->txq.ac]);
1487 void ieee80211_txq_set_params(struct ieee80211_local *local)
1489 if (local->hw.wiphy->txq_limit)
1490 local->fq.limit = local->hw.wiphy->txq_limit;
1492 local->hw.wiphy->txq_limit = local->fq.limit;
1494 if (local->hw.wiphy->txq_memory_limit)
1495 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1497 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1499 if (local->hw.wiphy->txq_quantum)
1500 local->fq.quantum = local->hw.wiphy->txq_quantum;
1502 local->hw.wiphy->txq_quantum = local->fq.quantum;
1505 int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1507 struct fq *fq = &local->fq;
1510 bool supp_vht = false;
1511 enum nl80211_band band;
1513 if (!local->ops->wake_tx_queue)
1516 ret = fq_init(fq, 4096);
1521 * If the hardware doesn't support VHT, it is safe to limit the maximum
1522 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1524 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1525 struct ieee80211_supported_band *sband;
1527 sband = local->hw.wiphy->bands[band];
1531 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1535 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1537 codel_params_init(&local->cparams);
1538 local->cparams.interval = MS2TIME(100);
1539 local->cparams.target = MS2TIME(20);
1540 local->cparams.ecn = true;
1542 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1544 if (!local->cvars) {
1545 spin_lock_bh(&fq->lock);
1546 fq_reset(fq, fq_skb_free_func);
1547 spin_unlock_bh(&fq->lock);
1551 for (i = 0; i < fq->flows_cnt; i++)
1552 codel_vars_init(&local->cvars[i]);
1554 ieee80211_txq_set_params(local);
1559 void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1561 struct fq *fq = &local->fq;
1563 if (!local->ops->wake_tx_queue)
1566 kfree(local->cvars);
1567 local->cvars = NULL;
1569 spin_lock_bh(&fq->lock);
1570 fq_reset(fq, fq_skb_free_func);
1571 spin_unlock_bh(&fq->lock);
1574 static bool ieee80211_queue_skb(struct ieee80211_local *local,
1575 struct ieee80211_sub_if_data *sdata,
1576 struct sta_info *sta,
1577 struct sk_buff *skb)
1579 struct ieee80211_vif *vif;
1580 struct txq_info *txqi;
1582 if (!local->ops->wake_tx_queue ||
1583 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1586 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1587 sdata = container_of(sdata->bss,
1588 struct ieee80211_sub_if_data, u.ap);
1591 txqi = ieee80211_get_txq(local, vif, sta, skb);
1596 ieee80211_txq_enqueue(local, txqi, skb);
1598 schedule_and_wake_txq(local, txqi);
1603 static bool ieee80211_tx_frags(struct ieee80211_local *local,
1604 struct ieee80211_vif *vif,
1605 struct sta_info *sta,
1606 struct sk_buff_head *skbs,
1609 struct ieee80211_tx_control control = {};
1610 struct sk_buff *skb, *tmp;
1611 unsigned long flags;
1613 skb_queue_walk_safe(skbs, skb, tmp) {
1614 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1615 int q = info->hw_queue;
1617 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1618 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1619 __skb_unlink(skb, skbs);
1620 ieee80211_free_txskb(&local->hw, skb);
1625 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1626 if (local->queue_stop_reasons[q] ||
1627 (!txpending && !skb_queue_empty(&local->pending[q]))) {
1628 if (unlikely(info->flags &
1629 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1630 if (local->queue_stop_reasons[q] &
1631 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1633 * Drop off-channel frames if queues
1634 * are stopped for any reason other
1635 * than off-channel operation. Never
1638 spin_unlock_irqrestore(
1639 &local->queue_stop_reason_lock,
1641 ieee80211_purge_tx_queue(&local->hw,
1648 * Since queue is stopped, queue up frames for
1649 * later transmission from the tx-pending
1650 * tasklet when the queue is woken again.
1653 skb_queue_splice_init(skbs,
1654 &local->pending[q]);
1656 skb_queue_splice_tail_init(skbs,
1657 &local->pending[q]);
1659 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1664 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1666 info->control.vif = vif;
1667 control.sta = sta ? &sta->sta : NULL;
1669 __skb_unlink(skb, skbs);
1670 drv_tx(local, &control, skb);
1677 * Returns false if the frame couldn't be transmitted but was queued instead.
1679 static bool __ieee80211_tx(struct ieee80211_local *local,
1680 struct sk_buff_head *skbs, int led_len,
1681 struct sta_info *sta, bool txpending)
1683 struct ieee80211_tx_info *info;
1684 struct ieee80211_sub_if_data *sdata;
1685 struct ieee80211_vif *vif;
1686 struct sk_buff *skb;
1690 if (WARN_ON(skb_queue_empty(skbs)))
1693 skb = skb_peek(skbs);
1694 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1695 info = IEEE80211_SKB_CB(skb);
1696 sdata = vif_to_sdata(info->control.vif);
1697 if (sta && !sta->uploaded)
1700 switch (sdata->vif.type) {
1701 case NL80211_IFTYPE_MONITOR:
1702 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1706 sdata = rcu_dereference(local->monitor_sdata);
1710 vif->hw_queue[skb_get_queue_mapping(skb)];
1711 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1712 ieee80211_purge_tx_queue(&local->hw, skbs);
1717 case NL80211_IFTYPE_AP_VLAN:
1718 sdata = container_of(sdata->bss,
1719 struct ieee80211_sub_if_data, u.ap);
1726 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
1728 ieee80211_tpt_led_trig_tx(local, fc, led_len);
1730 WARN_ON_ONCE(!skb_queue_empty(skbs));
1736 * Invoke TX handlers, return 0 on success and non-zero if the
1737 * frame was dropped or queued.
1739 * The handlers are split into an early and late part. The latter is everything
1740 * that can be sensitive to reordering, and will be deferred to after packets
1741 * are dequeued from the intermediate queues (when they are enabled).
1743 static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1745 ieee80211_tx_result res = TX_DROP;
1747 #define CALL_TXH(txh) \
1750 if (res != TX_CONTINUE) \
1754 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1755 CALL_TXH(ieee80211_tx_h_check_assoc);
1756 CALL_TXH(ieee80211_tx_h_ps_buf);
1757 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1758 CALL_TXH(ieee80211_tx_h_select_key);
1759 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1760 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1763 if (unlikely(res == TX_DROP)) {
1764 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1766 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1768 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1770 } else if (unlikely(res == TX_QUEUED)) {
1771 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1779 * Late handlers can be called while the sta lock is held. Handlers that can
1780 * cause packets to be generated will cause deadlock!
1782 static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1784 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1785 ieee80211_tx_result res = TX_CONTINUE;
1787 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1788 __skb_queue_tail(&tx->skbs, tx->skb);
1793 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1794 CALL_TXH(ieee80211_tx_h_sequence);
1795 CALL_TXH(ieee80211_tx_h_fragment);
1796 /* handlers after fragment must be aware of tx info fragmentation! */
1797 CALL_TXH(ieee80211_tx_h_stats);
1798 CALL_TXH(ieee80211_tx_h_encrypt);
1799 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1800 CALL_TXH(ieee80211_tx_h_calculate_duration);
1804 if (unlikely(res == TX_DROP)) {
1805 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1807 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1809 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1811 } else if (unlikely(res == TX_QUEUED)) {
1812 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1819 static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1821 int r = invoke_tx_handlers_early(tx);
1825 return invoke_tx_handlers_late(tx);
1828 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1829 struct ieee80211_vif *vif, struct sk_buff *skb,
1830 int band, struct ieee80211_sta **sta)
1832 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1833 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1834 struct ieee80211_tx_data tx;
1835 struct sk_buff *skb2;
1837 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
1841 info->control.vif = vif;
1842 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1844 if (invoke_tx_handlers(&tx))
1849 *sta = &tx.sta->sta;
1854 /* this function isn't suitable for fragmented data frames */
1855 skb2 = __skb_dequeue(&tx.skbs);
1856 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1857 ieee80211_free_txskb(hw, skb2);
1858 ieee80211_purge_tx_queue(hw, &tx.skbs);
1864 EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1867 * Returns false if the frame couldn't be transmitted but was queued instead.
1869 static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1870 struct sta_info *sta, struct sk_buff *skb,
1873 struct ieee80211_local *local = sdata->local;
1874 struct ieee80211_tx_data tx;
1875 ieee80211_tx_result res_prepare;
1876 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1880 if (unlikely(skb->len < 10)) {
1885 /* initialises tx */
1887 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
1889 if (unlikely(res_prepare == TX_DROP)) {
1890 ieee80211_free_txskb(&local->hw, skb);
1892 } else if (unlikely(res_prepare == TX_QUEUED)) {
1896 /* set up hw_queue value early */
1897 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1898 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1900 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1902 if (invoke_tx_handlers_early(&tx))
1905 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1908 if (!invoke_tx_handlers_late(&tx))
1909 result = __ieee80211_tx(local, &tx.skbs, led_len,
1915 /* device xmit handlers */
1917 enum ieee80211_encrypt {
1923 static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1924 struct sk_buff *skb,
1926 enum ieee80211_encrypt encrypt)
1928 struct ieee80211_local *local = sdata->local;
1932 enc_tailroom = encrypt == ENCRYPT_MGMT ||
1933 (encrypt == ENCRYPT_DATA &&
1934 sdata->crypto_tx_tailroom_needed_cnt);
1937 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1938 tail_need -= skb_tailroom(skb);
1939 tail_need = max_t(int, tail_need, 0);
1942 if (skb_cloned(skb) &&
1943 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1944 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
1945 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1946 else if (head_need || tail_need)
1947 I802_DEBUG_INC(local->tx_expand_skb_head);
1951 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
1952 wiphy_debug(local->hw.wiphy,
1953 "failed to reallocate TX buffer\n");
1960 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1961 struct sta_info *sta, struct sk_buff *skb)
1963 struct ieee80211_local *local = sdata->local;
1964 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1965 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1967 enum ieee80211_encrypt encrypt;
1969 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
1970 encrypt = ENCRYPT_NO;
1971 else if (ieee80211_is_mgmt(hdr->frame_control))
1972 encrypt = ENCRYPT_MGMT;
1974 encrypt = ENCRYPT_DATA;
1976 headroom = local->tx_headroom;
1977 if (encrypt != ENCRYPT_NO)
1978 headroom += sdata->encrypt_headroom;
1979 headroom -= skb_headroom(skb);
1980 headroom = max_t(int, 0, headroom);
1982 if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) {
1983 ieee80211_free_txskb(&local->hw, skb);
1987 /* reload after potential resize */
1988 hdr = (struct ieee80211_hdr *) skb->data;
1989 info->control.vif = &sdata->vif;
1991 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1992 if (ieee80211_is_data(hdr->frame_control) &&
1993 is_unicast_ether_addr(hdr->addr1)) {
1994 if (mesh_nexthop_resolve(sdata, skb))
1995 return; /* skb queued: don't free */
1997 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2001 ieee80211_set_qos_hdr(sdata, skb);
2002 ieee80211_tx(sdata, sta, skb, false);
2005 bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
2006 struct net_device *dev)
2008 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2009 struct ieee80211_radiotap_iterator iterator;
2010 struct ieee80211_radiotap_header *rthdr =
2011 (struct ieee80211_radiotap_header *) skb->data;
2012 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2013 struct ieee80211_supported_band *sband =
2014 local->hw.wiphy->bands[info->band];
2015 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2019 bool rate_found = false;
2020 u8 rate_retries = 0;
2022 u8 mcs_known, mcs_flags, mcs_bw;
2024 u8 vht_mcs = 0, vht_nss = 0;
2027 /* check for not even having the fixed radiotap header part */
2028 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2029 return false; /* too short to be possibly valid */
2031 /* is it a header version we can trust to find length from? */
2032 if (unlikely(rthdr->it_version))
2033 return false; /* only version 0 is supported */
2035 /* does the skb contain enough to deliver on the alleged length? */
2036 if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data)))
2037 return false; /* skb too short for claimed rt header extent */
2039 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2040 IEEE80211_TX_CTL_DONTFRAG;
2043 * for every radiotap entry that is present
2044 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2045 * entries present, or -EINVAL on error)
2049 ret = ieee80211_radiotap_iterator_next(&iterator);
2054 /* see if this argument is something we can use */
2055 switch (iterator.this_arg_index) {
2057 * You must take care when dereferencing iterator.this_arg
2058 * for multibyte types... the pointer is not aligned. Use
2059 * get_unaligned((type *)iterator.this_arg) to dereference
2060 * iterator.this_arg for type "type" safely on all arches.
2062 case IEEE80211_RADIOTAP_FLAGS:
2063 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2065 * this indicates that the skb we have been
2066 * handed has the 32-bit FCS CRC at the end...
2067 * we should react to that by snipping it off
2068 * because it will be recomputed and added
2071 if (skb->len < (iterator._max_length + FCS_LEN))
2074 skb_trim(skb, skb->len - FCS_LEN);
2076 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2077 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2078 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2079 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2082 case IEEE80211_RADIOTAP_TX_FLAGS:
2083 txflags = get_unaligned_le16(iterator.this_arg);
2084 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2085 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2086 if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO)
2087 info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO;
2088 if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER)
2089 info->control.flags |=
2090 IEEE80211_TX_CTRL_DONT_REORDER;
2093 case IEEE80211_RADIOTAP_RATE:
2094 rate = *iterator.this_arg;
2099 case IEEE80211_RADIOTAP_DATA_RETRIES:
2100 rate_retries = *iterator.this_arg;
2103 case IEEE80211_RADIOTAP_MCS:
2104 mcs_known = iterator.this_arg[0];
2105 mcs_flags = iterator.this_arg[1];
2106 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2110 rate = iterator.this_arg[2];
2111 rate_flags = IEEE80211_TX_RC_MCS;
2113 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2114 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2115 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2117 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2118 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2119 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2120 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2122 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_FEC &&
2123 mcs_flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC)
2124 info->flags |= IEEE80211_TX_CTL_LDPC;
2126 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_STBC) {
2127 u8 stbc = u8_get_bits(mcs_flags,
2128 IEEE80211_RADIOTAP_MCS_STBC_MASK);
2131 u32_encode_bits(stbc,
2132 IEEE80211_TX_CTL_STBC);
2136 case IEEE80211_RADIOTAP_VHT:
2137 vht_known = get_unaligned_le16(iterator.this_arg);
2140 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2141 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2142 (iterator.this_arg[2] &
2143 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2144 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2146 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2147 if (iterator.this_arg[3] == 1)
2149 IEEE80211_TX_RC_40_MHZ_WIDTH;
2150 else if (iterator.this_arg[3] == 4)
2152 IEEE80211_TX_RC_80_MHZ_WIDTH;
2153 else if (iterator.this_arg[3] == 11)
2155 IEEE80211_TX_RC_160_MHZ_WIDTH;
2158 vht_mcs = iterator.this_arg[4] >> 4;
2159 vht_nss = iterator.this_arg[4] & 0xF;
2163 * Please update the file
2164 * Documentation/networking/mac80211-injection.rst
2165 * when parsing new fields here.
2173 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2177 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2179 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2180 info->control.rates[i].idx = -1;
2181 info->control.rates[i].flags = 0;
2182 info->control.rates[i].count = 0;
2185 if (rate_flags & IEEE80211_TX_RC_MCS) {
2186 info->control.rates[0].idx = rate;
2187 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2188 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2191 for (i = 0; i < sband->n_bitrates; i++) {
2192 if (rate * 5 != sband->bitrates[i].bitrate)
2195 info->control.rates[0].idx = i;
2200 if (info->control.rates[0].idx < 0)
2201 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2203 info->control.rates[0].flags = rate_flags;
2204 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2205 local->hw.max_rate_tries);
2211 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2212 struct net_device *dev)
2214 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2215 struct ieee80211_chanctx_conf *chanctx_conf;
2216 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2217 struct ieee80211_hdr *hdr;
2218 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2219 struct cfg80211_chan_def *chandef;
2223 memset(info, 0, sizeof(*info));
2224 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2225 IEEE80211_TX_CTL_INJECTED;
2227 /* Sanity-check and process the injection radiotap header */
2228 if (!ieee80211_parse_tx_radiotap(skb, dev))
2231 /* we now know there is a radiotap header with a length we can use */
2232 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2235 * fix up the pointers accounting for the radiotap
2236 * header still being in there. We are being given
2237 * a precooked IEEE80211 header so no need for
2240 skb_set_mac_header(skb, len_rthdr);
2242 * these are just fixed to the end of the rt area since we
2243 * don't have any better information and at this point, nobody cares
2245 skb_set_network_header(skb, len_rthdr);
2246 skb_set_transport_header(skb, len_rthdr);
2248 if (skb->len < len_rthdr + 2)
2251 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2252 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2254 if (skb->len < len_rthdr + hdrlen)
2258 * Initialize skb->protocol if the injected frame is a data frame
2259 * carrying a rfc1042 header
2261 if (ieee80211_is_data(hdr->frame_control) &&
2262 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2263 u8 *payload = (u8 *)hdr + hdrlen;
2265 if (ether_addr_equal(payload, rfc1042_header))
2266 skb->protocol = cpu_to_be16((payload[6] << 8) |
2270 /* Initialize skb->priority for QoS frames. If the DONT_REORDER flag
2271 * is set, stick to the default value for skb->priority to assure
2272 * frames injected with this flag are not reordered relative to each
2275 if (ieee80211_is_data_qos(hdr->frame_control) &&
2276 !(info->control.flags & IEEE80211_TX_CTRL_DONT_REORDER)) {
2277 u8 *p = ieee80211_get_qos_ctl(hdr);
2278 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
2284 * We process outgoing injected frames that have a local address
2285 * we handle as though they are non-injected frames.
2286 * This code here isn't entirely correct, the local MAC address
2287 * isn't always enough to find the interface to use; for proper
2288 * VLAN support we have an nl80211-based mechanism.
2290 * This is necessary, for example, for old hostapd versions that
2291 * don't use nl80211-based management TX/RX.
2293 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2295 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2296 if (!ieee80211_sdata_running(tmp_sdata))
2298 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2299 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2301 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
2307 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2308 if (!chanctx_conf) {
2309 tmp_sdata = rcu_dereference(local->monitor_sdata);
2312 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2316 chandef = &chanctx_conf->def;
2317 else if (!local->use_chanctx)
2318 chandef = &local->_oper_chandef;
2323 * Frame injection is not allowed if beaconing is not allowed
2324 * or if we need radar detection. Beaconing is usually not allowed when
2325 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2326 * Passive scan is also used in world regulatory domains where
2327 * your country is not known and as such it should be treated as
2328 * NO TX unless the channel is explicitly allowed in which case
2329 * your current regulatory domain would not have the passive scan
2332 * Since AP mode uses monitor interfaces to inject/TX management
2333 * frames we can make AP mode the exception to this rule once it
2334 * supports radar detection as its implementation can deal with
2335 * radar detection by itself. We can do that later by adding a
2336 * monitor flag interfaces used for AP support.
2338 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2342 info->band = chandef->chan->band;
2344 /* remove the injection radiotap header */
2345 skb_pull(skb, len_rthdr);
2347 ieee80211_xmit(sdata, NULL, skb);
2350 return NETDEV_TX_OK;
2356 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
2359 static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2361 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2363 return ethertype == ETH_P_TDLS &&
2365 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2368 int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2369 struct sk_buff *skb,
2370 struct sta_info **sta_out)
2372 struct sta_info *sta;
2374 switch (sdata->vif.type) {
2375 case NL80211_IFTYPE_AP_VLAN:
2376 sta = rcu_dereference(sdata->u.vlan.sta);
2380 } else if (sdata->wdev.use_4addr) {
2384 case NL80211_IFTYPE_AP:
2385 case NL80211_IFTYPE_OCB:
2386 case NL80211_IFTYPE_ADHOC:
2387 if (is_multicast_ether_addr(skb->data)) {
2388 *sta_out = ERR_PTR(-ENOENT);
2391 sta = sta_info_get_bss(sdata, skb->data);
2393 #ifdef CONFIG_MAC80211_MESH
2394 case NL80211_IFTYPE_MESH_POINT:
2395 /* determined much later */
2399 case NL80211_IFTYPE_STATION:
2400 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2401 sta = sta_info_get(sdata, skb->data);
2402 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2403 if (test_sta_flag(sta,
2404 WLAN_STA_TDLS_PEER_AUTH)) {
2410 * TDLS link during setup - throw out frames to
2411 * peer. Allow TDLS-setup frames to unauthorized
2412 * peers for the special case of a link teardown
2413 * after a TDLS sta is removed due to being
2416 if (!ieee80211_is_tdls_setup(skb))
2422 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2430 *sta_out = sta ?: ERR_PTR(-ENOENT);
2434 static u16 ieee80211_store_ack_skb(struct ieee80211_local *local,
2435 struct sk_buff *skb,
2439 struct sk_buff *ack_skb;
2443 ack_skb = skb_clone_sk(skb);
2445 ack_skb = skb_clone(skb, GFP_ATOMIC);
2448 unsigned long flags;
2451 spin_lock_irqsave(&local->ack_status_lock, flags);
2452 id = idr_alloc(&local->ack_status_frames, ack_skb,
2453 1, 0x2000, GFP_ATOMIC);
2454 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2458 *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2460 *cookie = ieee80211_mgmt_tx_cookie(local);
2461 IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
2472 * ieee80211_build_hdr - build 802.11 header in the given frame
2473 * @sdata: virtual interface to build the header for
2474 * @skb: the skb to build the header in
2475 * @info_flags: skb flags to set
2476 * @sta: the station pointer
2477 * @ctrl_flags: info control flags to set
2478 * @cookie: cookie pointer to fill (if not %NULL)
2480 * This function takes the skb with 802.3 header and reformats the header to
2481 * the appropriate IEEE 802.11 header based on which interface the packet is
2482 * being transmitted on.
2484 * Note that this function also takes care of the TX status request and
2485 * potential unsharing of the SKB - this needs to be interleaved with the
2488 * The function requires the read-side RCU lock held
2490 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2492 static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2493 struct sk_buff *skb, u32 info_flags,
2494 struct sta_info *sta, u32 ctrl_flags,
2497 struct ieee80211_local *local = sdata->local;
2498 struct ieee80211_tx_info *info;
2500 u16 ethertype, hdrlen, meshhdrlen = 0;
2502 struct ieee80211_hdr hdr;
2503 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2504 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2505 const u8 *encaps_data;
2506 int encaps_len, skip_header_bytes;
2507 bool wme_sta = false, authorized = false;
2511 struct ieee80211_chanctx_conf *chanctx_conf;
2512 struct ieee80211_sub_if_data *ap_sdata;
2513 enum nl80211_band band;
2519 #ifdef CONFIG_MAC80211_DEBUGFS
2520 if (local->force_tx_status)
2521 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2524 /* convert Ethernet header to proper 802.11 header (based on
2525 * operation mode) */
2526 ethertype = (skb->data[12] << 8) | skb->data[13];
2527 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2529 switch (sdata->vif.type) {
2530 case NL80211_IFTYPE_AP_VLAN:
2531 if (sdata->wdev.use_4addr) {
2532 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2534 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2535 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2536 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2537 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2539 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2540 wme_sta = sta->sta.wme;
2542 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2544 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
2545 if (!chanctx_conf) {
2549 band = chanctx_conf->def.chan->band;
2550 if (sdata->wdev.use_4addr)
2553 case NL80211_IFTYPE_AP:
2554 if (sdata->vif.type == NL80211_IFTYPE_AP)
2555 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2556 if (!chanctx_conf) {
2560 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2562 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2563 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2564 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2566 band = chanctx_conf->def.chan->band;
2568 #ifdef CONFIG_MAC80211_MESH
2569 case NL80211_IFTYPE_MESH_POINT:
2570 if (!is_multicast_ether_addr(skb->data)) {
2571 struct sta_info *next_hop;
2572 bool mpp_lookup = true;
2574 mpath = mesh_path_lookup(sdata, skb->data);
2577 next_hop = rcu_dereference(mpath->next_hop);
2579 !(mpath->flags & (MESH_PATH_ACTIVE |
2580 MESH_PATH_RESOLVING)))
2585 mppath = mpp_path_lookup(sdata, skb->data);
2587 mppath->exp_time = jiffies;
2590 if (mppath && mpath)
2591 mesh_path_del(sdata, mpath->dst);
2595 * Use address extension if it is a packet from
2596 * another interface or if we know the destination
2597 * is being proxied by a portal (i.e. portal address
2598 * differs from proxied address)
2600 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2601 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
2602 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2603 skb->data, skb->data + ETH_ALEN);
2604 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2607 /* DS -> MBSS (802.11-2012 13.11.3.3).
2608 * For unicast with unknown forwarding information,
2609 * destination might be in the MBSS or if that fails
2610 * forwarded to another mesh gate. In either case
2611 * resolution will be handled in ieee80211_xmit(), so
2612 * leave the original DA. This also works for mcast */
2613 const u8 *mesh_da = skb->data;
2616 mesh_da = mppath->mpp;
2618 mesh_da = mpath->dst;
2620 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2621 mesh_da, sdata->vif.addr);
2622 if (is_multicast_ether_addr(mesh_da))
2623 /* DA TA mSA AE:SA */
2624 meshhdrlen = ieee80211_new_mesh_header(
2626 skb->data + ETH_ALEN, NULL);
2628 /* RA TA mDA mSA AE:DA SA */
2629 meshhdrlen = ieee80211_new_mesh_header(
2630 sdata, &mesh_hdr, skb->data,
2631 skb->data + ETH_ALEN);
2634 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2635 if (!chanctx_conf) {
2639 band = chanctx_conf->def.chan->band;
2641 /* For injected frames, fill RA right away as nexthop lookup
2644 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2645 is_zero_ether_addr(hdr.addr1))
2646 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2649 case NL80211_IFTYPE_STATION:
2650 /* we already did checks when looking up the RA STA */
2651 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
2655 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2656 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2657 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2659 } else if (sdata->u.mgd.use_4addr &&
2660 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2661 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2662 IEEE80211_FCTL_TODS);
2664 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2665 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2666 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2667 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2670 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2672 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2673 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2674 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2677 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2678 if (!chanctx_conf) {
2682 band = chanctx_conf->def.chan->band;
2684 case NL80211_IFTYPE_OCB:
2686 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2687 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2688 eth_broadcast_addr(hdr.addr3);
2690 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2691 if (!chanctx_conf) {
2695 band = chanctx_conf->def.chan->band;
2697 case NL80211_IFTYPE_ADHOC:
2699 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2700 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2701 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2703 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2704 if (!chanctx_conf) {
2708 band = chanctx_conf->def.chan->band;
2715 multicast = is_multicast_ether_addr(hdr.addr1);
2717 /* sta is always NULL for mesh */
2719 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2720 wme_sta = sta->sta.wme;
2721 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2722 /* For mesh, the use of the QoS header is mandatory */
2726 /* receiver does QoS (which also means we do) use it */
2728 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2733 * Drop unicast frames to unauthorised stations unless they are
2734 * EAPOL frames from the local station.
2736 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2737 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2738 !multicast && !authorized &&
2739 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2740 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
2741 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2742 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2743 sdata->name, hdr.addr1);
2746 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2752 if (unlikely(!multicast && ((skb->sk &&
2753 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) ||
2754 ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS)))
2755 info_id = ieee80211_store_ack_skb(local, skb, &info_flags,
2759 * If the skb is shared we need to obtain our own copy.
2761 if (skb_shared(skb)) {
2762 struct sk_buff *tmp_skb = skb;
2764 /* can't happen -- skb is a clone if info_id != 0 */
2767 skb = skb_clone(skb, GFP_ATOMIC);
2776 hdr.frame_control = fc;
2777 hdr.duration_id = 0;
2780 skip_header_bytes = ETH_HLEN;
2781 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2782 encaps_data = bridge_tunnel_header;
2783 encaps_len = sizeof(bridge_tunnel_header);
2784 skip_header_bytes -= 2;
2785 } else if (ethertype >= ETH_P_802_3_MIN) {
2786 encaps_data = rfc1042_header;
2787 encaps_len = sizeof(rfc1042_header);
2788 skip_header_bytes -= 2;
2794 skb_pull(skb, skip_header_bytes);
2795 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2798 * So we need to modify the skb header and hence need a copy of
2799 * that. The head_need variable above doesn't, so far, include
2800 * the needed header space that we don't need right away. If we
2801 * can, then we don't reallocate right now but only after the
2802 * frame arrives at the master device (if it does...)
2804 * If we cannot, however, then we will reallocate to include all
2805 * the ever needed space. Also, if we need to reallocate it anyway,
2806 * make it big enough for everything we may ever need.
2809 if (head_need > 0 || skb_cloned(skb)) {
2810 head_need += sdata->encrypt_headroom;
2811 head_need += local->tx_headroom;
2812 head_need = max_t(int, 0, head_need);
2813 if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) {
2814 ieee80211_free_txskb(&local->hw, skb);
2816 return ERR_PTR(-ENOMEM);
2821 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2823 #ifdef CONFIG_MAC80211_MESH
2825 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2828 if (ieee80211_is_data_qos(fc)) {
2829 __le16 *qos_control;
2831 qos_control = skb_push(skb, 2);
2832 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2834 * Maybe we could actually set some fields here, for now just
2835 * initialise to zero to indicate no special operation.
2839 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2841 skb_reset_mac_header(skb);
2843 info = IEEE80211_SKB_CB(skb);
2844 memset(info, 0, sizeof(*info));
2846 info->flags = info_flags;
2847 info->ack_frame_id = info_id;
2849 info->control.flags = ctrl_flags;
2854 return ERR_PTR(ret);
2858 * fast-xmit overview
2860 * The core idea of this fast-xmit is to remove per-packet checks by checking
2861 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2862 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2863 * much less work can be done per packet. For example, fragmentation must be
2864 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2867 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2868 * header and other data to aid packet processing in ieee80211_xmit_fast().
2870 * The most difficult part of this is that when any of these assumptions
2871 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2872 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2873 * since the per-packet code no longer checks the conditions. This is reflected
2874 * by the calls to these functions throughout the rest of the code, and must be
2875 * maintained if any of the TX path checks change.
2878 void ieee80211_check_fast_xmit(struct sta_info *sta)
2880 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2881 struct ieee80211_local *local = sta->local;
2882 struct ieee80211_sub_if_data *sdata = sta->sdata;
2883 struct ieee80211_hdr *hdr = (void *)build.hdr;
2884 struct ieee80211_chanctx_conf *chanctx_conf;
2887 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
2890 /* Locking here protects both the pointer itself, and against concurrent
2891 * invocations winning data access races to, e.g., the key pointer that
2893 * Without it, the invocation of this function right after the key
2894 * pointer changes wouldn't be sufficient, as another CPU could access
2895 * the pointer, then stall, and then do the cache update after the CPU
2896 * that invalidated the key.
2897 * With the locking, such scenarios cannot happen as the check for the
2898 * key and the fast-tx assignment are done atomically, so the CPU that
2899 * modifies the key will either wait or other one will see the key
2900 * cleared/changed already.
2902 spin_lock_bh(&sta->lock);
2903 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2904 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2905 sdata->vif.type == NL80211_IFTYPE_STATION)
2908 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2911 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2912 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2913 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2914 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
2917 if (sdata->noack_map)
2920 /* fast-xmit doesn't handle fragmentation at all */
2921 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2922 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
2926 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2927 if (!chanctx_conf) {
2931 build.band = chanctx_conf->def.chan->band;
2934 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2936 switch (sdata->vif.type) {
2937 case NL80211_IFTYPE_ADHOC:
2939 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2940 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2941 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2944 case NL80211_IFTYPE_STATION:
2945 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2947 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2948 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2949 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2954 if (sdata->u.mgd.use_4addr) {
2955 /* non-regular ethertype cannot use the fastpath */
2956 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2957 IEEE80211_FCTL_TODS);
2959 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2960 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2961 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2962 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2966 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2968 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2969 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2970 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2973 case NL80211_IFTYPE_AP_VLAN:
2974 if (sdata->wdev.use_4addr) {
2975 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2976 IEEE80211_FCTL_TODS);
2978 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2979 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2980 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2981 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2986 case NL80211_IFTYPE_AP:
2987 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2989 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2990 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2991 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2995 /* not handled on fast-xmit */
3001 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3004 /* We store the key here so there's no point in using rcu_dereference()
3005 * but that's fine because the code that changes the pointers will call
3006 * this function after doing so. For a single CPU that would be enough,
3007 * for multiple see the comment above.
3009 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3011 build.key = rcu_access_pointer(sdata->default_unicast_key);
3013 bool gen_iv, iv_spc, mmic;
3015 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3016 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
3017 mmic = build.key->conf.flags &
3018 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3019 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3021 /* don't handle software crypto */
3022 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3025 /* Key is being removed */
3026 if (build.key->flags & KEY_FLAG_TAINTED)
3029 switch (build.key->conf.cipher) {
3030 case WLAN_CIPHER_SUITE_CCMP:
3031 case WLAN_CIPHER_SUITE_CCMP_256:
3033 build.pn_offs = build.hdr_len;
3034 if (gen_iv || iv_spc)
3035 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3037 case WLAN_CIPHER_SUITE_GCMP:
3038 case WLAN_CIPHER_SUITE_GCMP_256:
3040 build.pn_offs = build.hdr_len;
3041 if (gen_iv || iv_spc)
3042 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3044 case WLAN_CIPHER_SUITE_TKIP:
3045 /* cannot handle MMIC or IV generation in xmit-fast */
3049 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3051 case WLAN_CIPHER_SUITE_WEP40:
3052 case WLAN_CIPHER_SUITE_WEP104:
3053 /* cannot handle IV generation in fast-xmit */
3057 build.hdr_len += IEEE80211_WEP_IV_LEN;
3059 case WLAN_CIPHER_SUITE_AES_CMAC:
3060 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3061 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3062 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3064 "management cipher suite 0x%x enabled for data\n",
3065 build.key->conf.cipher);
3068 /* we don't know how to generate IVs for this at all */
3069 if (WARN_ON(gen_iv))
3071 /* pure hardware keys are OK, of course */
3072 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3074 /* cipher scheme might require space allocation */
3076 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3079 build.hdr_len += build.key->conf.iv_len;
3082 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3085 hdr->frame_control = fc;
3087 memcpy(build.hdr + build.hdr_len,
3088 rfc1042_header, sizeof(rfc1042_header));
3089 build.hdr_len += sizeof(rfc1042_header);
3091 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3092 /* if the kmemdup fails, continue w/o fast_tx */
3097 /* we might have raced against another call to this function */
3098 old = rcu_dereference_protected(sta->fast_tx,
3099 lockdep_is_held(&sta->lock));
3100 rcu_assign_pointer(sta->fast_tx, fast_tx);
3102 kfree_rcu(old, rcu_head);
3103 spin_unlock_bh(&sta->lock);
3106 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3108 struct sta_info *sta;
3111 list_for_each_entry_rcu(sta, &local->sta_list, list)
3112 ieee80211_check_fast_xmit(sta);
3116 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3118 struct ieee80211_local *local = sdata->local;
3119 struct sta_info *sta;
3123 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3124 if (sdata != sta->sdata &&
3125 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3127 ieee80211_check_fast_xmit(sta);
3133 void ieee80211_clear_fast_xmit(struct sta_info *sta)
3135 struct ieee80211_fast_tx *fast_tx;
3137 spin_lock_bh(&sta->lock);
3138 fast_tx = rcu_dereference_protected(sta->fast_tx,
3139 lockdep_is_held(&sta->lock));
3140 RCU_INIT_POINTER(sta->fast_tx, NULL);
3141 spin_unlock_bh(&sta->lock);
3144 kfree_rcu(fast_tx, rcu_head);
3147 static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3148 struct sk_buff *skb, int headroom)
3150 if (skb_headroom(skb) < headroom) {
3151 I802_DEBUG_INC(local->tx_expand_skb_head);
3153 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
3154 wiphy_debug(local->hw.wiphy,
3155 "failed to reallocate TX buffer\n");
3163 static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3164 struct ieee80211_fast_tx *fast_tx,
3165 struct sk_buff *skb)
3167 struct ieee80211_local *local = sdata->local;
3168 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3169 struct ieee80211_hdr *hdr;
3170 struct ethhdr *amsdu_hdr;
3171 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3172 int subframe_len = skb->len - hdr_len;
3174 u8 *qc, *h_80211_src, *h_80211_dst;
3177 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3180 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3183 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr)))
3186 data = skb_push(skb, sizeof(*amsdu_hdr));
3187 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3189 amsdu_hdr = data + hdr_len;
3190 /* h_80211_src/dst is addr* field within hdr */
3191 h_80211_src = data + fast_tx->sa_offs;
3192 h_80211_dst = data + fast_tx->da_offs;
3194 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3195 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3196 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3198 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3199 * fields needs to be changed to BSSID for A-MSDU frames depending
3200 * on FromDS/ToDS values.
3202 switch (sdata->vif.type) {
3203 case NL80211_IFTYPE_STATION:
3204 bssid = sdata->u.mgd.bssid;
3206 case NL80211_IFTYPE_AP:
3207 case NL80211_IFTYPE_AP_VLAN:
3208 bssid = sdata->vif.addr;
3214 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3215 ether_addr_copy(h_80211_src, bssid);
3217 if (bssid && ieee80211_has_tods(hdr->frame_control))
3218 ether_addr_copy(h_80211_dst, bssid);
3220 qc = ieee80211_get_qos_ctl(hdr);
3221 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3223 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3228 static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3229 struct sta_info *sta,
3230 struct ieee80211_fast_tx *fast_tx,
3231 struct sk_buff *skb)
3233 struct ieee80211_local *local = sdata->local;
3234 struct fq *fq = &local->fq;
3236 struct fq_flow *flow;
3237 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3238 struct ieee80211_txq *txq = sta->sta.txq[tid];
3239 struct txq_info *txqi;
3240 struct sk_buff **frag_tail, *head;
3241 int subframe_len = skb->len - ETH_ALEN;
3242 u8 max_subframes = sta->sta.max_amsdu_subframes;
3243 int max_frags = local->hw.max_tx_fragments;
3244 int max_amsdu_len = sta->sta.max_amsdu_len;
3250 unsigned int orig_len;
3251 int n = 2, nfrags, pad = 0;
3254 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3257 if (skb_is_gso(skb))
3263 txqi = to_txq_info(txq);
3264 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3267 if (sta->sta.max_rc_amsdu_len)
3268 max_amsdu_len = min_t(int, max_amsdu_len,
3269 sta->sta.max_rc_amsdu_len);
3271 if (sta->sta.max_tid_amsdu_len[tid])
3272 max_amsdu_len = min_t(int, max_amsdu_len,
3273 sta->sta.max_tid_amsdu_len[tid]);
3275 flow_idx = fq_flow_idx(fq, skb);
3277 spin_lock_bh(&fq->lock);
3279 /* TODO: Ideally aggregation should be done on dequeue to remain
3280 * responsive to environment changes.
3284 flow = fq_flow_classify(fq, tin, flow_idx, skb);
3285 head = skb_peek_tail(&flow->queue);
3286 if (!head || skb_is_gso(head))
3289 orig_truesize = head->truesize;
3290 orig_len = head->len;
3292 if (skb->len + head->len > max_amsdu_len)
3295 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3296 nfrags += 1 + skb_shinfo(head)->nr_frags;
3297 frag_tail = &skb_shinfo(head)->frag_list;
3298 while (*frag_tail) {
3299 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3300 frag_tail = &(*frag_tail)->next;
3304 if (max_subframes && n > max_subframes)
3307 if (max_frags && nfrags > max_frags)
3310 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3313 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3317 * Pad out the previous subframe to a multiple of 4 by adding the
3318 * padding to the next one, that's being added. Note that head->len
3319 * is the length of the full A-MSDU, but that works since each time
3320 * we add a new subframe we pad out the previous one to a multiple
3321 * of 4 and thus it no longer matters in the next round.
3323 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3324 if ((head->len - hdrlen) & 3)
3325 pad = 4 - ((head->len - hdrlen) & 3);
3327 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
3332 data = skb_push(skb, ETH_ALEN + 2);
3333 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3335 data += 2 * ETH_ALEN;
3336 len = cpu_to_be16(subframe_len);
3337 memcpy(data, &len, 2);
3338 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3340 memset(skb_push(skb, pad), 0, pad);
3342 head->len += skb->len;
3343 head->data_len += skb->len;
3347 fq->memory_usage += head->truesize - orig_truesize;
3348 if (head->len != orig_len) {
3349 flow->backlog += head->len - orig_len;
3350 tin->backlog_bytes += head->len - orig_len;
3353 spin_unlock_bh(&fq->lock);
3359 * Can be called while the sta lock is held. Anything that can cause packets to
3360 * be generated will cause deadlock!
3362 static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3363 struct sta_info *sta, u8 pn_offs,
3364 struct ieee80211_key *key,
3365 struct sk_buff *skb)
3367 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3368 struct ieee80211_hdr *hdr = (void *)skb->data;
3369 u8 tid = IEEE80211_NUM_TIDS;
3372 info->control.hw_key = &key->conf;
3374 dev_sw_netstats_tx_add(skb->dev, 1, skb->len);
3376 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3377 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3378 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3380 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3381 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3382 sdata->sequence_number += 0x10;
3385 if (skb_shinfo(skb)->gso_size)
3386 sta->tx_stats.msdu[tid] +=
3387 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3389 sta->tx_stats.msdu[tid]++;
3391 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3393 /* statistics normally done by ieee80211_tx_h_stats (but that
3394 * has to consider fragmentation, so is more complex)
3396 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3397 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3401 u8 *crypto_hdr = skb->data + pn_offs;
3403 switch (key->conf.cipher) {
3404 case WLAN_CIPHER_SUITE_CCMP:
3405 case WLAN_CIPHER_SUITE_CCMP_256:
3406 case WLAN_CIPHER_SUITE_GCMP:
3407 case WLAN_CIPHER_SUITE_GCMP_256:
3408 pn = atomic64_inc_return(&key->conf.tx_pn);
3410 crypto_hdr[1] = pn >> 8;
3411 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3412 crypto_hdr[4] = pn >> 16;
3413 crypto_hdr[5] = pn >> 24;
3414 crypto_hdr[6] = pn >> 32;
3415 crypto_hdr[7] = pn >> 40;
3421 static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3422 struct sta_info *sta,
3423 struct ieee80211_fast_tx *fast_tx,
3424 struct sk_buff *skb)
3426 struct ieee80211_local *local = sdata->local;
3427 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3428 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3429 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3431 struct ieee80211_tx_info *info;
3432 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3433 struct ieee80211_tx_data tx;
3434 ieee80211_tx_result r;
3435 struct tid_ampdu_tx *tid_tx = NULL;
3436 u8 tid = IEEE80211_NUM_TIDS;
3438 /* control port protocol needs a lot of special handling */
3439 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3442 /* only RFC 1042 SNAP */
3443 if (ethertype < ETH_P_802_3_MIN)
3446 /* don't handle TX status request here either */
3447 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3450 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3451 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3452 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3454 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3456 if (tid_tx->timeout)
3457 tid_tx->last_tx = jiffies;
3461 /* after this point (skb is modified) we cannot return false */
3463 if (skb_shared(skb)) {
3464 struct sk_buff *tmp_skb = skb;
3466 skb = skb_clone(skb, GFP_ATOMIC);
3473 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3474 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3477 /* will not be crypto-handled beyond what we do here, so use false
3478 * as the may-encrypt argument for the resize to not account for
3479 * more room than we already have in 'extra_head'
3481 if (unlikely(ieee80211_skb_resize(sdata, skb,
3482 max_t(int, extra_head + hw_headroom -
3483 skb_headroom(skb), 0),
3489 memcpy(ð, skb->data, ETH_HLEN - 2);
3490 hdr = skb_push(skb, extra_head);
3491 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3492 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3493 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3495 info = IEEE80211_SKB_CB(skb);
3496 memset(info, 0, sizeof(*info));
3497 info->band = fast_tx->band;
3498 info->control.vif = &sdata->vif;
3499 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3500 IEEE80211_TX_CTL_DONTFRAG |
3501 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3502 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
3504 #ifdef CONFIG_MAC80211_DEBUGFS
3505 if (local->force_tx_status)
3506 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3509 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3510 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3511 *ieee80211_get_qos_ctl(hdr) = tid;
3514 __skb_queue_head_init(&tx.skbs);
3516 tx.flags = IEEE80211_TX_UNICAST;
3520 tx.key = fast_tx->key;
3522 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3524 r = ieee80211_tx_h_rate_ctrl(&tx);
3528 if (r != TX_CONTINUE) {
3535 if (ieee80211_queue_skb(local, sdata, sta, skb))
3538 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3541 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3542 sdata = container_of(sdata->bss,
3543 struct ieee80211_sub_if_data, u.ap);
3545 __skb_queue_tail(&tx.skbs, skb);
3546 ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false);
3550 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3551 struct ieee80211_txq *txq)
3553 struct ieee80211_local *local = hw_to_local(hw);
3554 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3555 struct ieee80211_hdr *hdr;
3556 struct sk_buff *skb = NULL;
3557 struct fq *fq = &local->fq;
3558 struct fq_tin *tin = &txqi->tin;
3559 struct ieee80211_tx_info *info;
3560 struct ieee80211_tx_data tx;
3561 ieee80211_tx_result r;
3562 struct ieee80211_vif *vif = txq->vif;
3564 WARN_ON_ONCE(softirq_count() == 0);
3566 if (!ieee80211_txq_airtime_check(hw, txq))
3570 spin_lock_bh(&fq->lock);
3572 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) ||
3573 test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags))
3576 if (vif->txqs_stopped[ieee80211_ac_from_tid(txq->tid)]) {
3577 set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags);
3581 /* Make sure fragments stay together. */
3582 skb = __skb_dequeue(&txqi->frags);
3586 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3590 spin_unlock_bh(&fq->lock);
3592 hdr = (struct ieee80211_hdr *)skb->data;
3593 info = IEEE80211_SKB_CB(skb);
3595 memset(&tx, 0, sizeof(tx));
3596 __skb_queue_head_init(&tx.skbs);
3599 tx.sdata = vif_to_sdata(info->control.vif);
3602 tx.sta = container_of(txq->sta, struct sta_info, sta);
3604 * Drop unicast frames to unauthorised stations unless they are
3605 * injected frames or EAPOL frames from the local station.
3607 if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
3608 ieee80211_is_data(hdr->frame_control) &&
3609 !ieee80211_vif_is_mesh(&tx.sdata->vif) &&
3610 tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3611 !is_multicast_ether_addr(hdr->addr1) &&
3612 !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3613 (!(info->control.flags &
3614 IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3615 !ether_addr_equal(tx.sdata->vif.addr,
3617 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3618 ieee80211_free_txskb(&local->hw, skb);
3624 * The key can be removed while the packet was queued, so need to call
3625 * this here to get the current key.
3627 r = ieee80211_tx_h_select_key(&tx);
3628 if (r != TX_CONTINUE) {
3629 ieee80211_free_txskb(&local->hw, skb);
3633 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3634 info->flags |= IEEE80211_TX_CTL_AMPDU;
3636 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3638 if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
3641 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3642 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3647 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3648 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3650 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3653 if (invoke_tx_handlers_late(&tx))
3656 skb = __skb_dequeue(&tx.skbs);
3658 if (!skb_queue_empty(&tx.skbs)) {
3659 spin_lock_bh(&fq->lock);
3660 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
3661 spin_unlock_bh(&fq->lock);
3665 if (skb_has_frag_list(skb) &&
3666 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3667 if (skb_linearize(skb)) {
3668 ieee80211_free_txskb(&local->hw, skb);
3673 switch (tx.sdata->vif.type) {
3674 case NL80211_IFTYPE_MONITOR:
3675 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3676 vif = &tx.sdata->vif;
3679 tx.sdata = rcu_dereference(local->monitor_sdata);
3681 vif = &tx.sdata->vif;
3683 vif->hw_queue[skb_get_queue_mapping(skb)];
3684 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3685 ieee80211_free_txskb(&local->hw, skb);
3691 case NL80211_IFTYPE_AP_VLAN:
3692 tx.sdata = container_of(tx.sdata->bss,
3693 struct ieee80211_sub_if_data, u.ap);
3696 vif = &tx.sdata->vif;
3701 IEEE80211_SKB_CB(skb)->control.vif = vif;
3704 wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) {
3705 bool ampdu = txq->ac != IEEE80211_AC_VO;
3708 airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta,
3711 airtime = ieee80211_info_set_tx_time_est(info, airtime);
3712 ieee80211_sta_update_pending_airtime(local, tx.sta,
3722 spin_unlock_bh(&fq->lock);
3726 EXPORT_SYMBOL(ieee80211_tx_dequeue);
3728 struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
3730 struct ieee80211_local *local = hw_to_local(hw);
3731 struct ieee80211_txq *ret = NULL;
3732 struct txq_info *txqi = NULL, *head = NULL;
3733 bool found_eligible_txq = false;
3735 spin_lock_bh(&local->active_txq_lock[ac]);
3738 txqi = list_first_entry_or_null(&local->active_txqs[ac],
3745 if (!found_eligible_txq)
3748 found_eligible_txq = false;
3754 if (txqi->txq.sta) {
3755 struct sta_info *sta = container_of(txqi->txq.sta,
3756 struct sta_info, sta);
3757 bool aql_check = ieee80211_txq_airtime_check(hw, &txqi->txq);
3758 s64 deficit = sta->airtime[txqi->txq.ac].deficit;
3761 found_eligible_txq = true;
3764 sta->airtime[txqi->txq.ac].deficit +=
3765 sta->airtime_weight;
3767 if (deficit < 0 || !aql_check) {
3768 list_move_tail(&txqi->schedule_order,
3769 &local->active_txqs[txqi->txq.ac]);
3775 if (txqi->schedule_round == local->schedule_round[ac])
3778 list_del_init(&txqi->schedule_order);
3779 txqi->schedule_round = local->schedule_round[ac];
3783 spin_unlock_bh(&local->active_txq_lock[ac]);
3786 EXPORT_SYMBOL(ieee80211_next_txq);
3788 void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
3789 struct ieee80211_txq *txq,
3792 struct ieee80211_local *local = hw_to_local(hw);
3793 struct txq_info *txqi = to_txq_info(txq);
3795 spin_lock_bh(&local->active_txq_lock[txq->ac]);
3797 if (list_empty(&txqi->schedule_order) &&
3798 (force || !skb_queue_empty(&txqi->frags) ||
3799 txqi->tin.backlog_packets)) {
3800 /* If airtime accounting is active, always enqueue STAs at the
3801 * head of the list to ensure that they only get moved to the
3802 * back by the airtime DRR scheduler once they have a negative
3803 * deficit. A station that already has a negative deficit will
3804 * get immediately moved to the back of the list on the next
3805 * call to ieee80211_next_txq().
3807 if (txqi->txq.sta && local->airtime_flags &&
3808 wiphy_ext_feature_isset(local->hw.wiphy,
3809 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
3810 list_add(&txqi->schedule_order,
3811 &local->active_txqs[txq->ac]);
3813 list_add_tail(&txqi->schedule_order,
3814 &local->active_txqs[txq->ac]);
3817 spin_unlock_bh(&local->active_txq_lock[txq->ac]);
3819 EXPORT_SYMBOL(__ieee80211_schedule_txq);
3821 DEFINE_STATIC_KEY_FALSE(aql_disable);
3823 bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
3824 struct ieee80211_txq *txq)
3826 struct sta_info *sta;
3827 struct ieee80211_local *local = hw_to_local(hw);
3829 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
3832 if (static_branch_unlikely(&aql_disable))
3838 sta = container_of(txq->sta, struct sta_info, sta);
3839 if (atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
3840 sta->airtime[txq->ac].aql_limit_low)
3843 if (atomic_read(&local->aql_total_pending_airtime) <
3844 local->aql_threshold &&
3845 atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
3846 sta->airtime[txq->ac].aql_limit_high)
3851 EXPORT_SYMBOL(ieee80211_txq_airtime_check);
3853 bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
3854 struct ieee80211_txq *txq)
3856 struct ieee80211_local *local = hw_to_local(hw);
3857 struct txq_info *iter, *tmp, *txqi = to_txq_info(txq);
3858 struct sta_info *sta;
3861 spin_lock_bh(&local->active_txq_lock[ac]);
3866 if (list_empty(&txqi->schedule_order))
3869 list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac],
3874 if (!iter->txq.sta) {
3875 list_move_tail(&iter->schedule_order,
3876 &local->active_txqs[ac]);
3879 sta = container_of(iter->txq.sta, struct sta_info, sta);
3880 if (sta->airtime[ac].deficit < 0)
3881 sta->airtime[ac].deficit += sta->airtime_weight;
3882 list_move_tail(&iter->schedule_order, &local->active_txqs[ac]);
3885 sta = container_of(txqi->txq.sta, struct sta_info, sta);
3886 if (sta->airtime[ac].deficit >= 0)
3889 sta->airtime[ac].deficit += sta->airtime_weight;
3890 list_move_tail(&txqi->schedule_order, &local->active_txqs[ac]);
3891 spin_unlock_bh(&local->active_txq_lock[ac]);
3895 if (!list_empty(&txqi->schedule_order))
3896 list_del_init(&txqi->schedule_order);
3897 spin_unlock_bh(&local->active_txq_lock[ac]);
3901 EXPORT_SYMBOL(ieee80211_txq_may_transmit);
3903 void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
3905 struct ieee80211_local *local = hw_to_local(hw);
3907 spin_lock_bh(&local->active_txq_lock[ac]);
3908 local->schedule_round[ac]++;
3909 spin_unlock_bh(&local->active_txq_lock[ac]);
3911 EXPORT_SYMBOL(ieee80211_txq_schedule_start);
3913 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3914 struct net_device *dev,
3919 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3920 struct ieee80211_local *local = sdata->local;
3921 struct sta_info *sta;
3922 struct sk_buff *next;
3924 if (unlikely(skb->len < ETH_HLEN)) {
3931 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3937 if (local->ops->wake_tx_queue) {
3938 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
3939 skb_set_queue_mapping(skb, queue);
3944 struct ieee80211_fast_tx *fast_tx;
3946 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
3948 fast_tx = rcu_dereference(sta->fast_tx);
3951 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
3955 if (skb_is_gso(skb)) {
3956 struct sk_buff *segs;
3958 segs = skb_gso_segment(skb, 0);
3966 /* we cannot process non-linear frames on this path */
3967 if (skb_linearize(skb)) {
3972 /* the frame could be fragmented, software-encrypted, and other
3973 * things so we cannot really handle checksum offload with it -
3974 * fix it up in software before we handle anything else.
3976 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3977 skb_set_transport_header(skb,
3978 skb_checksum_start_offset(skb));
3979 if (skb_checksum_help(skb))
3984 skb_list_walk_safe(skb, skb, next) {
3985 skb_mark_not_on_list(skb);
3987 if (skb->protocol == sdata->control_port_protocol)
3988 ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
3990 skb = ieee80211_build_hdr(sdata, skb, info_flags,
3991 sta, ctrl_flags, cookie);
3993 kfree_skb_list(next);
3997 dev_sw_netstats_tx_add(dev, 1, skb->len);
3999 ieee80211_xmit(sdata, sta, skb);
4008 static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
4013 err = skb_ensure_writable(skb, ETH_HLEN);
4017 eth = (void *)skb->data;
4018 ether_addr_copy(eth->h_dest, sta->sta.addr);
4023 static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
4024 struct net_device *dev)
4026 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4027 const struct ethhdr *eth = (void *)skb->data;
4028 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
4031 if (likely(!is_multicast_ether_addr(eth->h_dest)))
4034 switch (sdata->vif.type) {
4035 case NL80211_IFTYPE_AP_VLAN:
4036 if (sdata->u.vlan.sta)
4038 if (sdata->wdev.use_4addr)
4041 case NL80211_IFTYPE_AP:
4042 /* check runtime toggle for this bss */
4043 if (!sdata->bss->multicast_to_unicast)
4050 /* multicast to unicast conversion only for some payload */
4051 ethertype = eth->h_proto;
4052 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4053 ethertype = ethvlan->h_vlan_encapsulated_proto;
4054 switch (ethertype) {
4055 case htons(ETH_P_ARP):
4056 case htons(ETH_P_IP):
4057 case htons(ETH_P_IPV6):
4067 ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4068 struct sk_buff_head *queue)
4070 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4071 struct ieee80211_local *local = sdata->local;
4072 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4073 struct sta_info *sta, *first = NULL;
4074 struct sk_buff *cloned_skb;
4078 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4079 if (sdata != sta->sdata)
4080 /* AP-VLAN mismatch */
4082 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4083 /* do not send back to source */
4089 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4092 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4093 dev_kfree_skb(cloned_skb);
4096 __skb_queue_tail(queue, cloned_skb);
4099 if (likely(first)) {
4100 if (unlikely(ieee80211_change_da(skb, first)))
4102 __skb_queue_tail(queue, skb);
4104 /* no STA connected, drop */
4111 __skb_queue_purge(queue);
4112 __skb_queue_tail(queue, skb);
4118 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4119 * @skb: packet to be sent
4120 * @dev: incoming interface
4122 * On failure skb will be freed.
4124 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4125 struct net_device *dev)
4127 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4128 struct sk_buff_head queue;
4130 __skb_queue_head_init(&queue);
4131 ieee80211_convert_to_unicast(skb, dev, &queue);
4132 while ((skb = __skb_dequeue(&queue)))
4133 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4135 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4138 return NETDEV_TX_OK;
4141 static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4142 struct sk_buff *skb, int led_len,
4143 struct sta_info *sta,
4146 struct ieee80211_local *local = sdata->local;
4147 struct ieee80211_tx_control control = {};
4148 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4149 struct ieee80211_sta *pubsta = NULL;
4150 unsigned long flags;
4151 int q = info->hw_queue;
4153 if (ieee80211_queue_skb(local, sdata, sta, skb))
4156 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4158 if (local->queue_stop_reasons[q] ||
4159 (!txpending && !skb_queue_empty(&local->pending[q]))) {
4161 skb_queue_head(&local->pending[q], skb);
4163 skb_queue_tail(&local->pending[q], skb);
4165 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4170 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4172 if (sta && sta->uploaded)
4175 control.sta = pubsta;
4177 drv_tx(local, &control, skb);
4182 static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
4183 struct net_device *dev, struct sta_info *sta,
4184 struct ieee80211_key *key, struct sk_buff *skb)
4186 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4187 struct ieee80211_local *local = sdata->local;
4188 struct tid_ampdu_tx *tid_tx;
4191 if (local->ops->wake_tx_queue) {
4192 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4193 skb_set_queue_mapping(skb, queue);
4197 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) &&
4198 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
4201 memset(info, 0, sizeof(*info));
4203 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
4204 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
4206 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
4207 /* fall back to non-offload slow path */
4208 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4212 info->flags |= IEEE80211_TX_CTL_AMPDU;
4213 if (tid_tx->timeout)
4214 tid_tx->last_tx = jiffies;
4217 if (unlikely(skb->sk &&
4218 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS))
4219 info->ack_frame_id = ieee80211_store_ack_skb(local, skb,
4220 &info->flags, NULL);
4222 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
4224 dev_sw_netstats_tx_add(dev, 1, skb->len);
4226 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
4227 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
4229 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4230 sdata = container_of(sdata->bss,
4231 struct ieee80211_sub_if_data, u.ap);
4233 info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP;
4234 info->control.vif = &sdata->vif;
4237 info->control.hw_key = &key->conf;
4239 ieee80211_tx_8023(sdata, skb, skb->len, sta, false);
4247 netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
4248 struct net_device *dev)
4250 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4251 struct ethhdr *ehdr = (struct ethhdr *)skb->data;
4252 struct ieee80211_key *key;
4253 struct sta_info *sta;
4255 if (unlikely(skb->len < ETH_HLEN)) {
4257 return NETDEV_TX_OK;
4262 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4267 if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded ||
4268 !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
4269 sdata->control_port_protocol == ehdr->h_proto))
4272 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4274 key = rcu_dereference(sdata->default_unicast_key);
4276 if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) ||
4277 key->conf.cipher == WLAN_CIPHER_SUITE_TKIP))
4280 ieee80211_8023_xmit(sdata, dev, sta, key, skb);
4284 ieee80211_subif_start_xmit(skb, dev);
4288 return NETDEV_TX_OK;
4292 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4293 struct sk_buff *skb, u32 info_flags)
4295 struct ieee80211_hdr *hdr;
4296 struct ieee80211_tx_data tx = {
4297 .local = sdata->local,
4300 struct sta_info *sta;
4304 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4306 skb = ERR_PTR(-EINVAL);
4310 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0, NULL);
4314 hdr = (void *)skb->data;
4315 tx.sta = sta_info_get(sdata, hdr->addr1);
4318 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4321 return ERR_PTR(-EINVAL);
4330 * ieee80211_clear_tx_pending may not be called in a context where
4331 * it is possible that it packets could come in again.
4333 void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4335 struct sk_buff *skb;
4338 for (i = 0; i < local->hw.queues; i++) {
4339 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4340 ieee80211_free_txskb(&local->hw, skb);
4345 * Returns false if the frame couldn't be transmitted but was queued instead,
4346 * which in this case means re-queued -- take as an indication to stop sending
4347 * more pending frames.
4349 static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4350 struct sk_buff *skb)
4352 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4353 struct ieee80211_sub_if_data *sdata;
4354 struct sta_info *sta;
4355 struct ieee80211_hdr *hdr;
4357 struct ieee80211_chanctx_conf *chanctx_conf;
4359 sdata = vif_to_sdata(info->control.vif);
4361 if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) {
4362 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4363 if (unlikely(!chanctx_conf)) {
4367 info->band = chanctx_conf->def.chan->band;
4368 result = ieee80211_tx(sdata, NULL, skb, true);
4369 } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
4370 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4375 if (IS_ERR(sta) || (sta && !sta->uploaded))
4378 result = ieee80211_tx_8023(sdata, skb, skb->len, sta, true);
4380 struct sk_buff_head skbs;
4382 __skb_queue_head_init(&skbs);
4383 __skb_queue_tail(&skbs, skb);
4385 hdr = (struct ieee80211_hdr *)skb->data;
4386 sta = sta_info_get(sdata, hdr->addr1);
4388 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
4395 * Transmit all pending packets. Called from tasklet.
4397 void ieee80211_tx_pending(struct tasklet_struct *t)
4399 struct ieee80211_local *local = from_tasklet(local, t,
4400 tx_pending_tasklet);
4401 unsigned long flags;
4407 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4408 for (i = 0; i < local->hw.queues; i++) {
4410 * If queue is stopped by something other than due to pending
4411 * frames, or we have no pending frames, proceed to next queue.
4413 if (local->queue_stop_reasons[i] ||
4414 skb_queue_empty(&local->pending[i]))
4417 while (!skb_queue_empty(&local->pending[i])) {
4418 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
4419 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4421 if (WARN_ON(!info->control.vif)) {
4422 ieee80211_free_txskb(&local->hw, skb);
4426 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4429 txok = ieee80211_tx_pending_skb(local, skb);
4430 spin_lock_irqsave(&local->queue_stop_reason_lock,
4436 if (skb_queue_empty(&local->pending[i]))
4437 ieee80211_propagate_queue_wake(local, i);
4439 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4444 /* functions for drivers to get certain frames */
4446 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4447 struct ps_data *ps, struct sk_buff *skb,
4452 int i, have_bits = 0, n1, n2;
4454 /* Generate bitmap for TIM only if there are any STAs in power save
4456 if (atomic_read(&ps->num_sta_ps) > 0)
4457 /* in the hope that this is faster than
4458 * checking byte-for-byte */
4459 have_bits = !bitmap_empty((unsigned long *)ps->tim,
4460 IEEE80211_MAX_AID+1);
4462 if (ps->dtim_count == 0)
4463 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
4468 tim = pos = skb_put(skb, 6);
4469 *pos++ = WLAN_EID_TIM;
4471 *pos++ = ps->dtim_count;
4472 *pos++ = sdata->vif.bss_conf.dtim_period;
4474 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
4477 ps->dtim_bc_mc = aid0 == 1;
4480 /* Find largest even number N1 so that bits numbered 1 through
4481 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4482 * (N2 + 1) x 8 through 2007 are 0. */
4484 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4491 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4498 /* Bitmap control */
4500 /* Part Virt Bitmap */
4501 skb_put(skb, n2 - n1);
4502 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
4504 tim[1] = n2 - n1 + 4;
4506 *pos++ = aid0; /* Bitmap control */
4507 *pos++ = 0; /* Part Virt Bitmap */
4511 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4512 struct ps_data *ps, struct sk_buff *skb,
4515 struct ieee80211_local *local = sdata->local;
4518 * Not very nice, but we want to allow the driver to call
4519 * ieee80211_beacon_get() as a response to the set_tim()
4520 * callback. That, however, is already invoked under the
4521 * sta_lock to guarantee consistent and race-free update
4522 * of the tim bitmap in mac80211 and the driver.
4524 if (local->tim_in_locked_section) {
4525 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4527 spin_lock_bh(&local->tim_lock);
4528 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4529 spin_unlock_bh(&local->tim_lock);
4535 static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
4536 struct beacon_data *beacon)
4538 struct probe_resp *resp;
4540 size_t beacon_data_len;
4542 u8 count = beacon->cntdwn_current_counter;
4544 switch (sdata->vif.type) {
4545 case NL80211_IFTYPE_AP:
4546 beacon_data = beacon->tail;
4547 beacon_data_len = beacon->tail_len;
4549 case NL80211_IFTYPE_ADHOC:
4550 beacon_data = beacon->head;
4551 beacon_data_len = beacon->head_len;
4553 case NL80211_IFTYPE_MESH_POINT:
4554 beacon_data = beacon->head;
4555 beacon_data_len = beacon->head_len;
4562 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; ++i) {
4563 resp = rcu_dereference(sdata->u.ap.probe_resp);
4565 if (beacon->cntdwn_counter_offsets[i]) {
4566 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[i] >=
4572 beacon_data[beacon->cntdwn_counter_offsets[i]] = count;
4575 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4576 resp->data[resp->cntdwn_counter_offsets[i]] = count;
4581 static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon)
4583 beacon->cntdwn_current_counter--;
4585 /* the counter should never reach 0 */
4586 WARN_ON_ONCE(!beacon->cntdwn_current_counter);
4588 return beacon->cntdwn_current_counter;
4591 u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif)
4593 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4594 struct beacon_data *beacon = NULL;
4599 if (sdata->vif.type == NL80211_IFTYPE_AP)
4600 beacon = rcu_dereference(sdata->u.ap.beacon);
4601 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4602 beacon = rcu_dereference(sdata->u.ibss.presp);
4603 else if (ieee80211_vif_is_mesh(&sdata->vif))
4604 beacon = rcu_dereference(sdata->u.mesh.beacon);
4609 count = __ieee80211_beacon_update_cntdwn(beacon);
4615 EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
4617 void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
4619 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4620 struct beacon_data *beacon = NULL;
4624 if (sdata->vif.type == NL80211_IFTYPE_AP)
4625 beacon = rcu_dereference(sdata->u.ap.beacon);
4626 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4627 beacon = rcu_dereference(sdata->u.ibss.presp);
4628 else if (ieee80211_vif_is_mesh(&sdata->vif))
4629 beacon = rcu_dereference(sdata->u.mesh.beacon);
4634 if (counter < beacon->cntdwn_current_counter)
4635 beacon->cntdwn_current_counter = counter;
4640 EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
4642 bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif)
4644 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4645 struct beacon_data *beacon = NULL;
4647 size_t beacon_data_len;
4650 if (!ieee80211_sdata_running(sdata))
4654 if (vif->type == NL80211_IFTYPE_AP) {
4655 struct ieee80211_if_ap *ap = &sdata->u.ap;
4657 beacon = rcu_dereference(ap->beacon);
4658 if (WARN_ON(!beacon || !beacon->tail))
4660 beacon_data = beacon->tail;
4661 beacon_data_len = beacon->tail_len;
4662 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4663 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4665 beacon = rcu_dereference(ifibss->presp);
4669 beacon_data = beacon->head;
4670 beacon_data_len = beacon->head_len;
4671 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4672 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4674 beacon = rcu_dereference(ifmsh->beacon);
4678 beacon_data = beacon->head;
4679 beacon_data_len = beacon->head_len;
4685 if (!beacon->cntdwn_counter_offsets[0])
4688 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
4691 if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
4699 EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
4701 static int ieee80211_beacon_protect(struct sk_buff *skb,
4702 struct ieee80211_local *local,
4703 struct ieee80211_sub_if_data *sdata)
4705 ieee80211_tx_result res;
4706 struct ieee80211_tx_data tx;
4707 struct sk_buff *check_skb;
4709 memset(&tx, 0, sizeof(tx));
4710 tx.key = rcu_dereference(sdata->default_beacon_key);
4715 __skb_queue_head_init(&tx.skbs);
4716 __skb_queue_tail(&tx.skbs, skb);
4717 res = ieee80211_tx_h_encrypt(&tx);
4718 check_skb = __skb_dequeue(&tx.skbs);
4719 /* we may crash after this, but it'd be a bug in crypto */
4720 WARN_ON(check_skb != skb);
4721 if (WARN_ON_ONCE(res != TX_CONTINUE))
4727 static struct sk_buff *
4728 __ieee80211_beacon_get(struct ieee80211_hw *hw,
4729 struct ieee80211_vif *vif,
4730 struct ieee80211_mutable_offsets *offs,
4733 struct ieee80211_local *local = hw_to_local(hw);
4734 struct beacon_data *beacon = NULL;
4735 struct sk_buff *skb = NULL;
4736 struct ieee80211_tx_info *info;
4737 struct ieee80211_sub_if_data *sdata = NULL;
4738 enum nl80211_band band;
4739 struct ieee80211_tx_rate_control txrc;
4740 struct ieee80211_chanctx_conf *chanctx_conf;
4741 int csa_off_base = 0;
4745 sdata = vif_to_sdata(vif);
4746 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4748 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
4752 memset(offs, 0, sizeof(*offs));
4754 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4755 struct ieee80211_if_ap *ap = &sdata->u.ap;
4757 beacon = rcu_dereference(ap->beacon);
4759 if (beacon->cntdwn_counter_offsets[0]) {
4761 ieee80211_beacon_update_cntdwn(vif);
4763 ieee80211_set_beacon_cntdwn(sdata, beacon);
4767 * headroom, head length,
4768 * tail length and maximum TIM length
4770 skb = dev_alloc_skb(local->tx_headroom +
4772 beacon->tail_len + 256 +
4773 local->hw.extra_beacon_tailroom);
4777 skb_reserve(skb, local->tx_headroom);
4778 skb_put_data(skb, beacon->head, beacon->head_len);
4780 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4784 offs->tim_offset = beacon->head_len;
4785 offs->tim_length = skb->len - beacon->head_len;
4787 /* for AP the csa offsets are from tail */
4788 csa_off_base = skb->len;
4792 skb_put_data(skb, beacon->tail,
4795 if (ieee80211_beacon_protect(skb, local, sdata) < 0)
4799 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
4800 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4801 struct ieee80211_hdr *hdr;
4803 beacon = rcu_dereference(ifibss->presp);
4807 if (beacon->cntdwn_counter_offsets[0]) {
4809 __ieee80211_beacon_update_cntdwn(beacon);
4811 ieee80211_set_beacon_cntdwn(sdata, beacon);
4814 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
4815 local->hw.extra_beacon_tailroom);
4818 skb_reserve(skb, local->tx_headroom);
4819 skb_put_data(skb, beacon->head, beacon->head_len);
4821 hdr = (struct ieee80211_hdr *) skb->data;
4822 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4823 IEEE80211_STYPE_BEACON);
4824 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4825 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4827 beacon = rcu_dereference(ifmsh->beacon);
4831 if (beacon->cntdwn_counter_offsets[0]) {
4833 /* TODO: For mesh csa_counter is in TU, so
4834 * decrementing it by one isn't correct, but
4835 * for now we leave it consistent with overall
4836 * mac80211's behavior.
4838 __ieee80211_beacon_update_cntdwn(beacon);
4840 ieee80211_set_beacon_cntdwn(sdata, beacon);
4843 if (ifmsh->sync_ops)
4844 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
4846 skb = dev_alloc_skb(local->tx_headroom +
4850 local->hw.extra_beacon_tailroom);
4853 skb_reserve(skb, local->tx_headroom);
4854 skb_put_data(skb, beacon->head, beacon->head_len);
4855 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4858 offs->tim_offset = beacon->head_len;
4859 offs->tim_length = skb->len - beacon->head_len;
4862 skb_put_data(skb, beacon->tail, beacon->tail_len);
4869 if (offs && beacon) {
4872 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
4873 u16 csa_off = beacon->cntdwn_counter_offsets[i];
4878 offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
4882 band = chanctx_conf->def.chan->band;
4884 info = IEEE80211_SKB_CB(skb);
4886 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
4887 info->flags |= IEEE80211_TX_CTL_NO_ACK;
4890 memset(&txrc, 0, sizeof(txrc));
4892 txrc.sband = local->hw.wiphy->bands[band];
4893 txrc.bss_conf = &sdata->vif.bss_conf;
4895 txrc.reported_rate.idx = -1;
4896 if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band])
4897 txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band];
4899 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
4901 rate_control_get_rate(sdata, NULL, &txrc);
4903 info->control.vif = vif;
4905 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4906 IEEE80211_TX_CTL_ASSIGN_SEQ |
4907 IEEE80211_TX_CTL_FIRST_FRAGMENT;
4915 ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4916 struct ieee80211_vif *vif,
4917 struct ieee80211_mutable_offsets *offs)
4919 return __ieee80211_beacon_get(hw, vif, offs, true);
4921 EXPORT_SYMBOL(ieee80211_beacon_get_template);
4923 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4924 struct ieee80211_vif *vif,
4925 u16 *tim_offset, u16 *tim_length)
4927 struct ieee80211_mutable_offsets offs = {};
4928 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
4929 struct sk_buff *copy;
4930 struct ieee80211_supported_band *sband;
4937 *tim_offset = offs.tim_offset;
4940 *tim_length = offs.tim_length;
4942 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4943 !hw_to_local(hw)->monitors)
4946 /* send a copy to monitor interfaces */
4947 copy = skb_copy(bcn, GFP_ATOMIC);
4951 shift = ieee80211_vif_get_shift(vif);
4952 sband = ieee80211_get_sband(vif_to_sdata(vif));
4956 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false,
4961 EXPORT_SYMBOL(ieee80211_beacon_get_tim);
4963 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4964 struct ieee80211_vif *vif)
4966 struct ieee80211_if_ap *ap = NULL;
4967 struct sk_buff *skb = NULL;
4968 struct probe_resp *presp = NULL;
4969 struct ieee80211_hdr *hdr;
4970 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4972 if (sdata->vif.type != NL80211_IFTYPE_AP)
4978 presp = rcu_dereference(ap->probe_resp);
4982 skb = dev_alloc_skb(presp->len);
4986 skb_put_data(skb, presp->data, presp->len);
4988 hdr = (struct ieee80211_hdr *) skb->data;
4989 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4995 EXPORT_SYMBOL(ieee80211_proberesp_get);
4997 struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
4998 struct ieee80211_vif *vif)
5000 struct sk_buff *skb = NULL;
5001 struct fils_discovery_data *tmpl = NULL;
5002 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5004 if (sdata->vif.type != NL80211_IFTYPE_AP)
5008 tmpl = rcu_dereference(sdata->u.ap.fils_discovery);
5014 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5016 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5017 skb_put_data(skb, tmpl->data, tmpl->len);
5023 EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
5026 ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
5027 struct ieee80211_vif *vif)
5029 struct sk_buff *skb = NULL;
5030 struct unsol_bcast_probe_resp_data *tmpl = NULL;
5031 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5033 if (sdata->vif.type != NL80211_IFTYPE_AP)
5037 tmpl = rcu_dereference(sdata->u.ap.unsol_bcast_probe_resp);
5043 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5045 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5046 skb_put_data(skb, tmpl->data, tmpl->len);
5052 EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl);
5054 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
5055 struct ieee80211_vif *vif)
5057 struct ieee80211_sub_if_data *sdata;
5058 struct ieee80211_if_managed *ifmgd;
5059 struct ieee80211_pspoll *pspoll;
5060 struct ieee80211_local *local;
5061 struct sk_buff *skb;
5063 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5066 sdata = vif_to_sdata(vif);
5067 ifmgd = &sdata->u.mgd;
5068 local = sdata->local;
5070 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
5074 skb_reserve(skb, local->hw.extra_tx_headroom);
5076 pspoll = skb_put_zero(skb, sizeof(*pspoll));
5077 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
5078 IEEE80211_STYPE_PSPOLL);
5079 pspoll->aid = cpu_to_le16(sdata->vif.bss_conf.aid);
5081 /* aid in PS-Poll has its two MSBs each set to 1 */
5082 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
5084 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
5085 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
5089 EXPORT_SYMBOL(ieee80211_pspoll_get);
5091 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
5092 struct ieee80211_vif *vif,
5095 struct ieee80211_hdr_3addr *nullfunc;
5096 struct ieee80211_sub_if_data *sdata;
5097 struct ieee80211_if_managed *ifmgd;
5098 struct ieee80211_local *local;
5099 struct sk_buff *skb;
5102 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5105 sdata = vif_to_sdata(vif);
5106 ifmgd = &sdata->u.mgd;
5107 local = sdata->local;
5110 struct sta_info *sta;
5113 sta = sta_info_get(sdata, ifmgd->bssid);
5114 qos = sta && sta->sta.wme;
5118 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5119 sizeof(*nullfunc) + 2);
5123 skb_reserve(skb, local->hw.extra_tx_headroom);
5125 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
5126 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
5127 IEEE80211_STYPE_NULLFUNC |
5128 IEEE80211_FCTL_TODS);
5130 __le16 qoshdr = cpu_to_le16(7);
5132 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
5133 IEEE80211_STYPE_NULLFUNC) !=
5134 IEEE80211_STYPE_QOS_NULLFUNC);
5135 nullfunc->frame_control |=
5136 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
5138 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
5139 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
5142 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
5143 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
5144 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
5148 EXPORT_SYMBOL(ieee80211_nullfunc_get);
5150 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
5152 const u8 *ssid, size_t ssid_len,
5155 struct ieee80211_local *local = hw_to_local(hw);
5156 struct ieee80211_hdr_3addr *hdr;
5157 struct sk_buff *skb;
5161 ie_ssid_len = 2 + ssid_len;
5163 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
5164 ie_ssid_len + tailroom);
5168 skb_reserve(skb, local->hw.extra_tx_headroom);
5170 hdr = skb_put_zero(skb, sizeof(*hdr));
5171 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5172 IEEE80211_STYPE_PROBE_REQ);
5173 eth_broadcast_addr(hdr->addr1);
5174 memcpy(hdr->addr2, src_addr, ETH_ALEN);
5175 eth_broadcast_addr(hdr->addr3);
5177 pos = skb_put(skb, ie_ssid_len);
5178 *pos++ = WLAN_EID_SSID;
5181 memcpy(pos, ssid, ssid_len);
5186 EXPORT_SYMBOL(ieee80211_probereq_get);
5188 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5189 const void *frame, size_t frame_len,
5190 const struct ieee80211_tx_info *frame_txctl,
5191 struct ieee80211_rts *rts)
5193 const struct ieee80211_hdr *hdr = frame;
5195 rts->frame_control =
5196 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
5197 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
5199 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
5200 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
5202 EXPORT_SYMBOL(ieee80211_rts_get);
5204 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5205 const void *frame, size_t frame_len,
5206 const struct ieee80211_tx_info *frame_txctl,
5207 struct ieee80211_cts *cts)
5209 const struct ieee80211_hdr *hdr = frame;
5211 cts->frame_control =
5212 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
5213 cts->duration = ieee80211_ctstoself_duration(hw, vif,
5214 frame_len, frame_txctl);
5215 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
5217 EXPORT_SYMBOL(ieee80211_ctstoself_get);
5220 ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
5221 struct ieee80211_vif *vif)
5223 struct ieee80211_local *local = hw_to_local(hw);
5224 struct sk_buff *skb = NULL;
5225 struct ieee80211_tx_data tx;
5226 struct ieee80211_sub_if_data *sdata;
5228 struct ieee80211_tx_info *info;
5229 struct ieee80211_chanctx_conf *chanctx_conf;
5231 sdata = vif_to_sdata(vif);
5234 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5239 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5240 struct beacon_data *beacon =
5241 rcu_dereference(sdata->u.ap.beacon);
5243 if (!beacon || !beacon->head)
5246 ps = &sdata->u.ap.ps;
5247 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5248 ps = &sdata->u.mesh.ps;
5253 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
5254 goto out; /* send buffered bc/mc only after DTIM beacon */
5257 skb = skb_dequeue(&ps->bc_buf);
5260 local->total_ps_buffered--;
5262 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
5263 struct ieee80211_hdr *hdr =
5264 (struct ieee80211_hdr *) skb->data;
5265 /* more buffered multicast/broadcast frames ==> set
5266 * MoreData flag in IEEE 802.11 header to inform PS
5268 hdr->frame_control |=
5269 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5272 if (sdata->vif.type == NL80211_IFTYPE_AP)
5273 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
5274 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
5276 ieee80211_free_txskb(hw, skb);
5279 info = IEEE80211_SKB_CB(skb);
5281 tx.flags |= IEEE80211_TX_PS_BUFFERED;
5282 info->band = chanctx_conf->def.chan->band;
5284 if (invoke_tx_handlers(&tx))
5291 EXPORT_SYMBOL(ieee80211_get_buffered_bc);
5293 int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5295 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5296 struct ieee80211_sub_if_data *sdata = sta->sdata;
5297 struct ieee80211_local *local = sdata->local;
5301 lockdep_assert_held(&local->sta_mtx);
5303 /* only some cases are supported right now */
5304 switch (sdata->vif.type) {
5305 case NL80211_IFTYPE_STATION:
5306 case NL80211_IFTYPE_AP:
5307 case NL80211_IFTYPE_AP_VLAN:
5314 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5317 if (sta->reserved_tid == tid) {
5322 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5323 sdata_err(sdata, "TID reservation already active\n");
5328 ieee80211_stop_vif_queues(sdata->local, sdata,
5329 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5333 /* Tear down BA sessions so we stop aggregating on this TID */
5334 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
5335 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
5336 __ieee80211_stop_tx_ba_session(sta, tid,
5337 AGG_STOP_LOCAL_REQUEST);
5340 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
5341 __ieee80211_flush_queues(local, sdata, queues, false);
5343 sta->reserved_tid = tid;
5345 ieee80211_wake_vif_queues(local, sdata,
5346 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5348 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
5349 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
5355 EXPORT_SYMBOL(ieee80211_reserve_tid);
5357 void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5359 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5360 struct ieee80211_sub_if_data *sdata = sta->sdata;
5362 lockdep_assert_held(&sdata->local->sta_mtx);
5364 /* only some cases are supported right now */
5365 switch (sdata->vif.type) {
5366 case NL80211_IFTYPE_STATION:
5367 case NL80211_IFTYPE_AP:
5368 case NL80211_IFTYPE_AP_VLAN:
5375 if (tid != sta->reserved_tid) {
5376 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
5380 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
5382 EXPORT_SYMBOL(ieee80211_unreserve_tid);
5384 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
5385 struct sk_buff *skb, int tid,
5386 enum nl80211_band band)
5388 int ac = ieee80211_ac_from_tid(tid);
5390 skb_reset_mac_header(skb);
5391 skb_set_queue_mapping(skb, ac);
5392 skb->priority = tid;
5394 skb->dev = sdata->dev;
5397 * The other path calling ieee80211_xmit is from the tasklet,
5398 * and while we can handle concurrent transmissions locking
5399 * requirements are that we do not come into tx with bhs on.
5402 IEEE80211_SKB_CB(skb)->band = band;
5403 ieee80211_xmit(sdata, NULL, skb);
5407 int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
5408 const u8 *buf, size_t len,
5409 const u8 *dest, __be16 proto, bool unencrypted,
5412 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5413 struct ieee80211_local *local = sdata->local;
5414 struct sta_info *sta;
5415 struct sk_buff *skb;
5416 struct ethhdr *ehdr;
5420 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
5421 * or Pre-Authentication
5423 if (proto != sdata->control_port_protocol &&
5424 proto != cpu_to_be16(ETH_P_PREAUTH))
5427 if (proto == sdata->control_port_protocol)
5428 ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
5429 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
5432 flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5435 ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
5437 flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX;
5439 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5440 sizeof(struct ethhdr) + len);
5444 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
5446 skb_put_data(skb, buf, len);
5448 ehdr = skb_push(skb, sizeof(struct ethhdr));
5449 memcpy(ehdr->h_dest, dest, ETH_ALEN);
5450 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
5451 ehdr->h_proto = proto;
5454 skb->protocol = proto;
5455 skb_reset_network_header(skb);
5456 skb_reset_mac_header(skb);
5458 /* update QoS header to prioritize control port frames if possible,
5459 * priorization also happens for control port frames send over
5464 if (ieee80211_lookup_ra_sta(sdata, skb, &sta) == 0 && !IS_ERR(sta)) {
5465 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
5467 skb_set_queue_mapping(skb, queue);
5473 /* mutex lock is only needed for incrementing the cookie counter */
5474 mutex_lock(&local->mtx);
5477 __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags, cookie);
5480 mutex_unlock(&local->mtx);
5485 int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
5486 const u8 *buf, size_t len)
5488 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5489 struct ieee80211_local *local = sdata->local;
5490 struct sk_buff *skb;
5492 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
5493 30 + /* header size */
5494 18); /* 11s header size */
5498 skb_reserve(skb, local->hw.extra_tx_headroom);
5499 skb_put_data(skb, buf, len);
5502 skb->protocol = htons(ETH_P_802_3);
5503 skb_reset_network_header(skb);
5504 skb_reset_mac_header(skb);
5507 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
5508 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP,