1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2018-2021 Intel Corporation
10 * Transmit and frame generation functions.
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/skbuff.h>
16 #include <linux/if_vlan.h>
17 #include <linux/etherdevice.h>
18 #include <linux/bitmap.h>
19 #include <linux/rcupdate.h>
20 #include <linux/export.h>
21 #include <linux/timekeeping.h>
22 #include <net/net_namespace.h>
23 #include <net/ieee80211_radiotap.h>
24 #include <net/cfg80211.h>
25 #include <net/mac80211.h>
26 #include <net/codel.h>
27 #include <net/codel_impl.h>
28 #include <asm/unaligned.h>
29 #include <net/fq_impl.h>
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
42 static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
43 struct sk_buff *skb, int group_addr,
46 int rate, mrate, erp, dur, i, shift = 0;
47 struct ieee80211_rate *txrate;
48 struct ieee80211_local *local = tx->local;
49 struct ieee80211_supported_band *sband;
50 struct ieee80211_hdr *hdr;
51 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
52 struct ieee80211_chanctx_conf *chanctx_conf;
55 /* assume HW handles this */
56 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
60 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
62 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
63 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
68 if (WARN_ON_ONCE(tx->rate.idx < 0))
71 sband = local->hw.wiphy->bands[info->band];
72 txrate = &sband->bitrates[tx->rate.idx];
74 erp = txrate->flags & IEEE80211_RATE_ERP_G;
76 /* device is expected to do this */
77 if (sband->band == NL80211_BAND_S1GHZ)
81 * data and mgmt (except PS Poll):
83 * - during contention period:
84 * if addr1 is group address: 0
85 * if more fragments = 0 and addr1 is individual address: time to
86 * transmit one ACK plus SIFS
87 * if more fragments = 1 and addr1 is individual address: time to
88 * transmit next fragment plus 2 x ACK plus 3 x SIFS
91 * - control response frame (CTS or ACK) shall be transmitted using the
92 * same rate as the immediately previous frame in the frame exchange
93 * sequence, if this rate belongs to the PHY mandatory rates, or else
94 * at the highest possible rate belonging to the PHY rates in the
97 hdr = (struct ieee80211_hdr *)skb->data;
98 if (ieee80211_is_ctl(hdr->frame_control)) {
99 /* TODO: These control frames are not currently sent by
100 * mac80211, but should they be implemented, this function
101 * needs to be updated to support duration field calculation.
103 * RTS: time needed to transmit pending data/mgmt frame plus
104 * one CTS frame plus one ACK frame plus 3 x SIFS
105 * CTS: duration of immediately previous RTS minus time
106 * required to transmit CTS and its SIFS
107 * ACK: 0 if immediately previous directed data/mgmt had
108 * more=0, with more=1 duration in ACK frame is duration
109 * from previous frame minus time needed to transmit ACK
111 * PS Poll: BIT(15) | BIT(14) | aid
117 if (0 /* FIX: data/mgmt during CFP */)
118 return cpu_to_le16(32768);
120 if (group_addr) /* Group address as the destination - no ACK */
123 /* Individual destination address:
124 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
125 * CTS and ACK frames shall be transmitted using the highest rate in
126 * basic rate set that is less than or equal to the rate of the
127 * immediately previous frame and that is using the same modulation
128 * (CCK or OFDM). If no basic rate set matches with these requirements,
129 * the highest mandatory rate of the PHY that is less than or equal to
130 * the rate of the previous frame is used.
131 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
134 /* use lowest available if everything fails */
135 mrate = sband->bitrates[0].bitrate;
136 for (i = 0; i < sband->n_bitrates; i++) {
137 struct ieee80211_rate *r = &sband->bitrates[i];
139 if (r->bitrate > txrate->bitrate)
142 if ((rate_flags & r->flags) != rate_flags)
145 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
146 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
148 switch (sband->band) {
149 case NL80211_BAND_2GHZ: {
151 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
152 flag = IEEE80211_RATE_MANDATORY_G;
154 flag = IEEE80211_RATE_MANDATORY_B;
159 case NL80211_BAND_5GHZ:
160 case NL80211_BAND_6GHZ:
161 if (r->flags & IEEE80211_RATE_MANDATORY_A)
164 case NL80211_BAND_S1GHZ:
165 case NL80211_BAND_60GHZ:
166 /* TODO, for now fall through */
167 case NUM_NL80211_BANDS:
173 /* No matching basic rate found; use highest suitable mandatory
175 rate = DIV_ROUND_UP(mrate, 1 << shift);
178 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
179 if (ieee80211_is_data_qos(hdr->frame_control) &&
180 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
183 /* Time needed to transmit ACK
184 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
185 * to closest integer */
186 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
187 tx->sdata->vif.bss_conf.use_short_preamble,
191 /* Frame is fragmented: duration increases with time needed to
192 * transmit next fragment plus ACK and 2 x SIFS. */
193 dur *= 2; /* ACK + SIFS */
195 dur += ieee80211_frame_duration(sband->band, next_frag_len,
196 txrate->bitrate, erp,
197 tx->sdata->vif.bss_conf.use_short_preamble,
201 return cpu_to_le16(dur);
205 static ieee80211_tx_result debug_noinline
206 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
208 struct ieee80211_local *local = tx->local;
209 struct ieee80211_if_managed *ifmgd;
210 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
212 /* driver doesn't support power save */
213 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
216 /* hardware does dynamic power save */
217 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
220 /* dynamic power save disabled */
221 if (local->hw.conf.dynamic_ps_timeout <= 0)
224 /* we are scanning, don't enable power save */
228 if (!local->ps_sdata)
231 /* No point if we're going to suspend */
232 if (local->quiescing)
235 /* dynamic ps is supported only in managed mode */
236 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
239 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
242 ifmgd = &tx->sdata->u.mgd;
245 * Don't wakeup from power save if u-apsd is enabled, voip ac has
246 * u-apsd enabled and the frame is in voip class. This effectively
247 * means that even if all access categories have u-apsd enabled, in
248 * practise u-apsd is only used with the voip ac. This is a
249 * workaround for the case when received voip class packets do not
250 * have correct qos tag for some reason, due the network or the
253 * Note: ifmgd->uapsd_queues access is racy here. If the value is
254 * changed via debugfs, user needs to reassociate manually to have
255 * everything in sync.
257 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
258 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
259 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
262 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
263 ieee80211_stop_queues_by_reason(&local->hw,
264 IEEE80211_MAX_QUEUE_MAP,
265 IEEE80211_QUEUE_STOP_REASON_PS,
267 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
268 ieee80211_queue_work(&local->hw,
269 &local->dynamic_ps_disable_work);
272 /* Don't restart the timer if we're not disassociated */
273 if (!ifmgd->associated)
276 mod_timer(&local->dynamic_ps_timer, jiffies +
277 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
282 static ieee80211_tx_result debug_noinline
283 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
286 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
287 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
290 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
293 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
294 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
295 !ieee80211_is_probe_req(hdr->frame_control) &&
296 !ieee80211_is_any_nullfunc(hdr->frame_control))
298 * When software scanning only nullfunc frames (to notify
299 * the sleep state to the AP) and probe requests (for the
300 * active scan) are allowed, all other frames should not be
301 * sent and we should not get here, but if we do
302 * nonetheless, drop them to avoid sending them
303 * off-channel. See the link below and
304 * ieee80211_start_scan() for more.
306 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
310 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
313 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
317 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
319 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
320 if (unlikely(!assoc &&
321 ieee80211_is_data(hdr->frame_control))) {
322 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
323 sdata_info(tx->sdata,
324 "dropped data frame to not associated station %pM\n",
327 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
330 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
331 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
333 * No associated STAs - no need to send multicast
342 /* This function is called whenever the AP is about to exceed the maximum limit
343 * of buffered frames for power saving STAs. This situation should not really
344 * happen often during normal operation, so dropping the oldest buffered packet
345 * from each queue should be OK to make some room for new frames. */
346 static void purge_old_ps_buffers(struct ieee80211_local *local)
348 int total = 0, purged = 0;
350 struct ieee80211_sub_if_data *sdata;
351 struct sta_info *sta;
353 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
356 if (sdata->vif.type == NL80211_IFTYPE_AP)
357 ps = &sdata->u.ap.ps;
358 else if (ieee80211_vif_is_mesh(&sdata->vif))
359 ps = &sdata->u.mesh.ps;
363 skb = skb_dequeue(&ps->bc_buf);
366 ieee80211_free_txskb(&local->hw, skb);
368 total += skb_queue_len(&ps->bc_buf);
372 * Drop one frame from each station from the lowest-priority
373 * AC that has frames at all.
375 list_for_each_entry_rcu(sta, &local->sta_list, list) {
378 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
379 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
380 total += skb_queue_len(&sta->ps_tx_buf[ac]);
383 ieee80211_free_txskb(&local->hw, skb);
389 local->total_ps_buffered = total;
390 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
393 static ieee80211_tx_result
394 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
396 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
397 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
401 * broadcast/multicast frame
403 * If any of the associated/peer stations is in power save mode,
404 * the frame is buffered to be sent after DTIM beacon frame.
405 * This is done either by the hardware or us.
408 /* powersaving STAs currently only in AP/VLAN/mesh mode */
409 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
410 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
414 ps = &tx->sdata->bss->ps;
415 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
416 ps = &tx->sdata->u.mesh.ps;
422 /* no buffering for ordered frames */
423 if (ieee80211_has_order(hdr->frame_control))
426 if (ieee80211_is_probe_req(hdr->frame_control))
429 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
430 info->hw_queue = tx->sdata->vif.cab_queue;
432 /* no stations in PS mode and no buffered packets */
433 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
436 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
438 /* device releases frame after DTIM beacon */
439 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
442 /* buffered in mac80211 */
443 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
444 purge_old_ps_buffers(tx->local);
446 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
448 "BC TX buffer full - dropping the oldest frame\n");
449 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
451 tx->local->total_ps_buffered++;
453 skb_queue_tail(&ps->bc_buf, tx->skb);
458 static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
461 if (!ieee80211_is_mgmt(fc))
464 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
467 if (!ieee80211_is_robust_mgmt_frame(skb))
473 static ieee80211_tx_result
474 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
476 struct sta_info *sta = tx->sta;
477 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
478 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
479 struct ieee80211_local *local = tx->local;
484 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
485 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
486 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
487 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
488 int ac = skb_get_queue_mapping(tx->skb);
490 if (ieee80211_is_mgmt(hdr->frame_control) &&
491 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
492 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
496 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
497 sta->sta.addr, sta->sta.aid, ac);
498 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
499 purge_old_ps_buffers(tx->local);
501 /* sync with ieee80211_sta_ps_deliver_wakeup */
502 spin_lock(&sta->ps_lock);
504 * STA woke up the meantime and all the frames on ps_tx_buf have
505 * been queued to pending queue. No reordering can happen, go
506 * ahead and Tx the packet.
508 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
509 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
510 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
511 spin_unlock(&sta->ps_lock);
515 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
516 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
518 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
520 ieee80211_free_txskb(&local->hw, old);
522 tx->local->total_ps_buffered++;
524 info->control.jiffies = jiffies;
525 info->control.vif = &tx->sdata->vif;
526 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
527 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
528 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
529 spin_unlock(&sta->ps_lock);
531 if (!timer_pending(&local->sta_cleanup))
532 mod_timer(&local->sta_cleanup,
533 round_jiffies(jiffies +
534 STA_INFO_CLEANUP_INTERVAL));
537 * We queued up some frames, so the TIM bit might
538 * need to be set, recalculate it.
540 sta_info_recalc_tim(sta);
543 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
545 "STA %pM in PS mode, but polling/in SP -> send frame\n",
552 static ieee80211_tx_result debug_noinline
553 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
555 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
558 if (tx->flags & IEEE80211_TX_UNICAST)
559 return ieee80211_tx_h_unicast_ps_buf(tx);
561 return ieee80211_tx_h_multicast_ps_buf(tx);
564 static ieee80211_tx_result debug_noinline
565 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
567 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
569 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
570 if (tx->sdata->control_port_no_encrypt)
571 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
572 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
573 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
579 static ieee80211_tx_result debug_noinline
580 ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
582 struct ieee80211_key *key;
583 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
584 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
586 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
592 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
594 else if (ieee80211_is_group_privacy_action(tx->skb) &&
595 (key = rcu_dereference(tx->sdata->default_multicast_key)))
597 else if (ieee80211_is_mgmt(hdr->frame_control) &&
598 is_multicast_ether_addr(hdr->addr1) &&
599 ieee80211_is_robust_mgmt_frame(tx->skb) &&
600 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
602 else if (is_multicast_ether_addr(hdr->addr1) &&
603 (key = rcu_dereference(tx->sdata->default_multicast_key)))
605 else if (!is_multicast_ether_addr(hdr->addr1) &&
606 (key = rcu_dereference(tx->sdata->default_unicast_key)))
612 bool skip_hw = false;
614 /* TODO: add threshold stuff again */
616 switch (tx->key->conf.cipher) {
617 case WLAN_CIPHER_SUITE_WEP40:
618 case WLAN_CIPHER_SUITE_WEP104:
619 case WLAN_CIPHER_SUITE_TKIP:
620 if (!ieee80211_is_data_present(hdr->frame_control))
623 case WLAN_CIPHER_SUITE_CCMP:
624 case WLAN_CIPHER_SUITE_CCMP_256:
625 case WLAN_CIPHER_SUITE_GCMP:
626 case WLAN_CIPHER_SUITE_GCMP_256:
627 if (!ieee80211_is_data_present(hdr->frame_control) &&
628 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
630 !ieee80211_is_group_privacy_action(tx->skb))
633 skip_hw = (tx->key->conf.flags &
634 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
635 ieee80211_is_mgmt(hdr->frame_control);
637 case WLAN_CIPHER_SUITE_AES_CMAC:
638 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
639 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
640 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
641 if (!ieee80211_is_mgmt(hdr->frame_control))
646 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
647 !ieee80211_is_deauth(hdr->frame_control)))
650 if (!skip_hw && tx->key &&
651 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
652 info->control.hw_key = &tx->key->conf;
653 } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta &&
654 test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) {
661 static ieee80211_tx_result debug_noinline
662 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
664 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
665 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
666 struct ieee80211_supported_band *sband;
668 struct ieee80211_tx_rate_control txrc;
669 struct ieee80211_sta_rates *ratetbl = NULL;
670 bool encap = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
673 memset(&txrc, 0, sizeof(txrc));
675 sband = tx->local->hw.wiphy->bands[info->band];
677 len = min_t(u32, tx->skb->len + FCS_LEN,
678 tx->local->hw.wiphy->frag_threshold);
680 /* set up the tx rate control struct we give the RC algo */
681 txrc.hw = &tx->local->hw;
683 txrc.bss_conf = &tx->sdata->vif.bss_conf;
685 txrc.reported_rate.idx = -1;
686 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
688 if (tx->sdata->rc_has_mcs_mask[info->band])
689 txrc.rate_idx_mcs_mask =
690 tx->sdata->rc_rateidx_mcs_mask[info->band];
692 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
693 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
694 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
695 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
697 /* set up RTS protection if desired */
698 if (len > tx->local->hw.wiphy->rts_threshold) {
702 info->control.use_rts = txrc.rts;
703 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
706 * Use short preamble if the BSS can handle it, but not for
707 * management frames unless we know the receiver can handle
708 * that -- the management frame might be to a station that
709 * just wants a probe response.
711 if (tx->sdata->vif.bss_conf.use_short_preamble &&
712 (ieee80211_is_tx_data(tx->skb) ||
713 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
714 txrc.short_preamble = true;
716 info->control.short_preamble = txrc.short_preamble;
718 /* don't ask rate control when rate already injected via radiotap */
719 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
723 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
726 * Lets not bother rate control if we're associated and cannot
727 * talk to the sta. This should not happen.
729 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
730 !rate_usable_index_exists(sband, &tx->sta->sta),
731 "%s: Dropped data frame as no usable bitrate found while "
732 "scanning and associated. Target station: "
733 "%pM on %d GHz band\n",
735 encap ? ((struct ethhdr *)hdr)->h_dest : hdr->addr1,
740 * If we're associated with the sta at this point we know we can at
741 * least send the frame at the lowest bit rate.
743 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
745 if (tx->sta && !info->control.skip_table)
746 ratetbl = rcu_dereference(tx->sta->sta.rates);
748 if (unlikely(info->control.rates[0].idx < 0)) {
750 struct ieee80211_tx_rate rate = {
751 .idx = ratetbl->rate[0].idx,
752 .flags = ratetbl->rate[0].flags,
753 .count = ratetbl->rate[0].count
756 if (ratetbl->rate[0].idx < 0)
764 tx->rate = info->control.rates[0];
767 if (txrc.reported_rate.idx < 0) {
768 txrc.reported_rate = tx->rate;
769 if (tx->sta && ieee80211_is_tx_data(tx->skb))
770 tx->sta->tx_stats.last_rate = txrc.reported_rate;
772 tx->sta->tx_stats.last_rate = txrc.reported_rate;
777 if (unlikely(!info->control.rates[0].count))
778 info->control.rates[0].count = 1;
780 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
781 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
782 info->control.rates[0].count = 1;
787 static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
789 u16 *seq = &sta->tid_seq[tid];
790 __le16 ret = cpu_to_le16(*seq);
792 /* Increase the sequence number. */
793 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
798 static ieee80211_tx_result debug_noinline
799 ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
801 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
802 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
806 * Packet injection may want to control the sequence
807 * number, if we have no matching interface then we
808 * neither assign one ourselves nor ask the driver to.
810 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
813 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
816 if (ieee80211_hdrlen(hdr->frame_control) < 24)
819 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
822 if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
826 * Anything but QoS data that has a sequence number field
827 * (is long enough) gets a sequence number from the global
828 * counter. QoS data frames with a multicast destination
829 * also use the global counter (802.11-2012 9.3.2.10).
831 if (!ieee80211_is_data_qos(hdr->frame_control) ||
832 is_multicast_ether_addr(hdr->addr1)) {
833 /* driver should assign sequence number */
834 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
835 /* for pure STA mode without beacons, we can do it */
836 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
837 tx->sdata->sequence_number += 0x10;
839 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
844 * This should be true for injected/management frames only, for
845 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
846 * above since they are not QoS-data frames.
851 /* include per-STA, per-TID sequence counter */
852 tid = ieee80211_get_tid(hdr);
853 tx->sta->tx_stats.msdu[tid]++;
855 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
860 static int ieee80211_fragment(struct ieee80211_tx_data *tx,
861 struct sk_buff *skb, int hdrlen,
864 struct ieee80211_local *local = tx->local;
865 struct ieee80211_tx_info *info;
867 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
868 int pos = hdrlen + per_fragm;
869 int rem = skb->len - hdrlen - per_fragm;
871 if (WARN_ON(rem < 0))
874 /* first fragment was already added to queue by caller */
877 int fraglen = per_fragm;
882 tmp = dev_alloc_skb(local->tx_headroom +
884 tx->sdata->encrypt_headroom +
885 IEEE80211_ENCRYPT_TAILROOM);
889 __skb_queue_tail(&tx->skbs, tmp);
892 local->tx_headroom + tx->sdata->encrypt_headroom);
894 /* copy control information */
895 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
897 info = IEEE80211_SKB_CB(tmp);
898 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
899 IEEE80211_TX_CTL_FIRST_FRAGMENT);
902 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
904 skb_copy_queue_mapping(tmp, skb);
905 tmp->priority = skb->priority;
908 /* copy header and data */
909 skb_put_data(tmp, skb->data, hdrlen);
910 skb_put_data(tmp, skb->data + pos, fraglen);
915 /* adjust first fragment's length */
916 skb_trim(skb, hdrlen + per_fragm);
920 static ieee80211_tx_result debug_noinline
921 ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
923 struct sk_buff *skb = tx->skb;
924 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
925 struct ieee80211_hdr *hdr = (void *)skb->data;
926 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
930 /* no matter what happens, tx->skb moves to tx->skbs */
931 __skb_queue_tail(&tx->skbs, skb);
934 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
937 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
941 * Warn when submitting a fragmented A-MPDU frame and drop it.
942 * This scenario is handled in ieee80211_tx_prepare but extra
943 * caution taken here as fragmented ampdu may cause Tx stop.
945 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
948 hdrlen = ieee80211_hdrlen(hdr->frame_control);
950 /* internal error, why isn't DONTFRAG set? */
951 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
955 * Now fragment the frame. This will allocate all the fragments and
956 * chain them (using skb as the first fragment) to skb->next.
957 * During transmission, we will remove the successfully transmitted
958 * fragments from this list. When the low-level driver rejects one
959 * of the fragments then we will simply pretend to accept the skb
960 * but store it away as pending.
962 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
965 /* update duration/seq/flags of fragments */
968 skb_queue_walk(&tx->skbs, skb) {
969 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
971 hdr = (void *)skb->data;
972 info = IEEE80211_SKB_CB(skb);
974 if (!skb_queue_is_last(&tx->skbs, skb)) {
975 hdr->frame_control |= morefrags;
977 * No multi-rate retries for fragmented frames, that
978 * would completely throw off the NAV at other STAs.
980 info->control.rates[1].idx = -1;
981 info->control.rates[2].idx = -1;
982 info->control.rates[3].idx = -1;
983 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
984 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
986 hdr->frame_control &= ~morefrags;
988 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
995 static ieee80211_tx_result debug_noinline
996 ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1004 skb_queue_walk(&tx->skbs, skb) {
1005 ac = skb_get_queue_mapping(skb);
1006 tx->sta->tx_stats.bytes[ac] += skb->len;
1009 tx->sta->tx_stats.packets[ac]++;
1014 static ieee80211_tx_result debug_noinline
1015 ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1020 switch (tx->key->conf.cipher) {
1021 case WLAN_CIPHER_SUITE_WEP40:
1022 case WLAN_CIPHER_SUITE_WEP104:
1023 return ieee80211_crypto_wep_encrypt(tx);
1024 case WLAN_CIPHER_SUITE_TKIP:
1025 return ieee80211_crypto_tkip_encrypt(tx);
1026 case WLAN_CIPHER_SUITE_CCMP:
1027 return ieee80211_crypto_ccmp_encrypt(
1028 tx, IEEE80211_CCMP_MIC_LEN);
1029 case WLAN_CIPHER_SUITE_CCMP_256:
1030 return ieee80211_crypto_ccmp_encrypt(
1031 tx, IEEE80211_CCMP_256_MIC_LEN);
1032 case WLAN_CIPHER_SUITE_AES_CMAC:
1033 return ieee80211_crypto_aes_cmac_encrypt(tx);
1034 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1035 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
1036 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1037 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1038 return ieee80211_crypto_aes_gmac_encrypt(tx);
1039 case WLAN_CIPHER_SUITE_GCMP:
1040 case WLAN_CIPHER_SUITE_GCMP_256:
1041 return ieee80211_crypto_gcmp_encrypt(tx);
1043 return ieee80211_crypto_hw_encrypt(tx);
1049 static ieee80211_tx_result debug_noinline
1050 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1052 struct sk_buff *skb;
1053 struct ieee80211_hdr *hdr;
1057 skb_queue_walk(&tx->skbs, skb) {
1058 hdr = (void *) skb->data;
1059 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1060 break; /* must not overwrite AID */
1061 if (!skb_queue_is_last(&tx->skbs, skb)) {
1062 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1063 next_len = next->len;
1066 group_addr = is_multicast_ether_addr(hdr->addr1);
1069 ieee80211_duration(tx, skb, group_addr, next_len);
1075 /* actual transmit path */
1077 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1078 struct sk_buff *skb,
1079 struct ieee80211_tx_info *info,
1080 struct tid_ampdu_tx *tid_tx,
1083 bool queued = false;
1084 bool reset_agg_timer = false;
1085 struct sk_buff *purge_skb = NULL;
1087 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1088 info->flags |= IEEE80211_TX_CTL_AMPDU;
1089 reset_agg_timer = true;
1090 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1092 * nothing -- this aggregation session is being started
1093 * but that might still fail with the driver
1095 } else if (!tx->sta->sta.txq[tid]) {
1096 spin_lock(&tx->sta->lock);
1098 * Need to re-check now, because we may get here
1100 * 1) in the window during which the setup is actually
1101 * already done, but not marked yet because not all
1102 * packets are spliced over to the driver pending
1103 * queue yet -- if this happened we acquire the lock
1104 * either before or after the splice happens, but
1105 * need to recheck which of these cases happened.
1107 * 2) during session teardown, if the OPERATIONAL bit
1108 * was cleared due to the teardown but the pointer
1109 * hasn't been assigned NULL yet (or we loaded it
1110 * before it was assigned) -- in this case it may
1111 * now be NULL which means we should just let the
1112 * packet pass through because splicing the frames
1113 * back is already done.
1115 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1118 /* do nothing, let packet pass through */
1119 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1120 info->flags |= IEEE80211_TX_CTL_AMPDU;
1121 reset_agg_timer = true;
1124 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1125 clear_sta_flag(tx->sta, WLAN_STA_SP);
1126 ps_dbg(tx->sta->sdata,
1127 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1128 tx->sta->sta.addr, tx->sta->sta.aid);
1130 info->control.vif = &tx->sdata->vif;
1131 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1132 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
1133 __skb_queue_tail(&tid_tx->pending, skb);
1134 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1135 purge_skb = __skb_dequeue(&tid_tx->pending);
1137 spin_unlock(&tx->sta->lock);
1140 ieee80211_free_txskb(&tx->local->hw, purge_skb);
1143 /* reset session timer */
1144 if (reset_agg_timer)
1145 tid_tx->last_tx = jiffies;
1151 ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
1152 struct sta_info *sta,
1153 struct sk_buff *skb)
1155 struct rate_control_ref *ref = sdata->local->rate_ctrl;
1158 if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER))
1161 if (!sta || !sta->sta.ht_cap.ht_supported ||
1162 !sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO ||
1163 skb->protocol == sdata->control_port_protocol)
1166 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1167 if (likely(sta->ampdu_mlme.tid_tx[tid]))
1170 ieee80211_start_tx_ba_session(&sta->sta, tid, 0);
1175 * pass %NULL for the station if unknown, a valid pointer if known
1176 * or an ERR_PTR() if the station is known not to exist
1178 static ieee80211_tx_result
1179 ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1180 struct ieee80211_tx_data *tx,
1181 struct sta_info *sta, struct sk_buff *skb)
1183 struct ieee80211_local *local = sdata->local;
1184 struct ieee80211_hdr *hdr;
1185 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1186 bool aggr_check = false;
1189 memset(tx, 0, sizeof(*tx));
1193 __skb_queue_head_init(&tx->skbs);
1196 * If this flag is set to true anywhere, and we get here,
1197 * we are doing the needed processing, so remove the flag
1200 info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1202 hdr = (struct ieee80211_hdr *) skb->data;
1208 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1209 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1210 if (!tx->sta && sdata->wdev.use_4addr)
1212 } else if (tx->sdata->control_port_protocol == tx->skb->protocol) {
1213 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1215 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) {
1216 tx->sta = sta_info_get(sdata, hdr->addr1);
1221 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
1222 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
1223 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1224 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1225 struct tid_ampdu_tx *tid_tx;
1227 tid = ieee80211_get_tid(hdr);
1228 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1229 if (!tid_tx && aggr_check) {
1230 ieee80211_aggr_check(sdata, tx->sta, skb);
1231 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1237 queued = ieee80211_tx_prep_agg(tx, skb, info,
1240 if (unlikely(queued))
1245 if (is_multicast_ether_addr(hdr->addr1)) {
1246 tx->flags &= ~IEEE80211_TX_UNICAST;
1247 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1249 tx->flags |= IEEE80211_TX_UNICAST;
1251 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1252 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1253 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1254 info->flags & IEEE80211_TX_CTL_AMPDU)
1255 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1259 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1260 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
1261 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1262 ieee80211_check_fast_xmit(tx->sta);
1265 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1270 static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1271 struct ieee80211_vif *vif,
1272 struct sta_info *sta,
1273 struct sk_buff *skb)
1275 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1276 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1277 struct ieee80211_txq *txq = NULL;
1279 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1280 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1283 if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
1284 unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1285 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
1286 ieee80211_is_bufferable_mmpdu(hdr->frame_control) ||
1287 vif->type == NL80211_IFTYPE_STATION) &&
1288 sta && sta->uploaded) {
1290 * This will be NULL if the driver didn't set the
1291 * opt-in hardware flag.
1293 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1296 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1301 txq = sta->sta.txq[tid];
1309 return to_txq_info(txq);
1312 static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1314 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1317 static u32 codel_skb_len_func(const struct sk_buff *skb)
1322 static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1324 const struct ieee80211_tx_info *info;
1326 info = (const struct ieee80211_tx_info *)skb->cb;
1327 return info->control.enqueue_time;
1330 static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1333 struct ieee80211_local *local;
1334 struct txq_info *txqi;
1336 struct fq_flow *flow;
1339 local = vif_to_sdata(txqi->txq.vif)->local;
1342 if (cvars == &txqi->def_cvars)
1343 flow = &txqi->tin.default_flow;
1345 flow = &fq->flows[cvars - local->cvars];
1347 return fq_flow_dequeue(fq, flow);
1350 static void codel_drop_func(struct sk_buff *skb,
1353 struct ieee80211_local *local;
1354 struct ieee80211_hw *hw;
1355 struct txq_info *txqi;
1358 local = vif_to_sdata(txqi->txq.vif)->local;
1361 ieee80211_free_txskb(hw, skb);
1364 static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1366 struct fq_flow *flow)
1368 struct ieee80211_local *local;
1369 struct txq_info *txqi;
1370 struct codel_vars *cvars;
1371 struct codel_params *cparams;
1372 struct codel_stats *cstats;
1374 local = container_of(fq, struct ieee80211_local, fq);
1375 txqi = container_of(tin, struct txq_info, tin);
1376 cstats = &txqi->cstats;
1378 if (txqi->txq.sta) {
1379 struct sta_info *sta = container_of(txqi->txq.sta,
1380 struct sta_info, sta);
1381 cparams = &sta->cparams;
1383 cparams = &local->cparams;
1386 if (flow == &tin->default_flow)
1387 cvars = &txqi->def_cvars;
1389 cvars = &local->cvars[flow - fq->flows];
1391 return codel_dequeue(txqi,
1397 codel_skb_time_func,
1399 codel_dequeue_func);
1402 static void fq_skb_free_func(struct fq *fq,
1404 struct fq_flow *flow,
1405 struct sk_buff *skb)
1407 struct ieee80211_local *local;
1409 local = container_of(fq, struct ieee80211_local, fq);
1410 ieee80211_free_txskb(&local->hw, skb);
1413 static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1414 struct txq_info *txqi,
1415 struct sk_buff *skb)
1417 struct fq *fq = &local->fq;
1418 struct fq_tin *tin = &txqi->tin;
1419 u32 flow_idx = fq_flow_idx(fq, skb);
1421 ieee80211_set_skb_enqueue_time(skb);
1423 spin_lock_bh(&fq->lock);
1425 * For management frames, don't really apply codel etc.,
1426 * we don't want to apply any shaping or anything we just
1427 * want to simplify the driver API by having them on the
1430 if (unlikely(txqi->txq.tid == IEEE80211_NUM_TIDS)) {
1431 IEEE80211_SKB_CB(skb)->control.flags |=
1432 IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1433 __skb_queue_tail(&txqi->frags, skb);
1435 fq_tin_enqueue(fq, tin, flow_idx, skb,
1438 spin_unlock_bh(&fq->lock);
1441 static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1442 struct fq_flow *flow, struct sk_buff *skb,
1445 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1447 return info->control.vif == data;
1450 void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1451 struct ieee80211_sub_if_data *sdata)
1453 struct fq *fq = &local->fq;
1454 struct txq_info *txqi;
1456 struct ieee80211_sub_if_data *ap;
1458 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1461 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1466 txqi = to_txq_info(ap->vif.txq);
1469 spin_lock_bh(&fq->lock);
1470 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1472 spin_unlock_bh(&fq->lock);
1475 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1476 struct sta_info *sta,
1477 struct txq_info *txqi, int tid)
1479 fq_tin_init(&txqi->tin);
1480 codel_vars_init(&txqi->def_cvars);
1481 codel_stats_init(&txqi->cstats);
1482 __skb_queue_head_init(&txqi->frags);
1483 RB_CLEAR_NODE(&txqi->schedule_order);
1485 txqi->txq.vif = &sdata->vif;
1488 sdata->vif.txq = &txqi->txq;
1490 txqi->txq.ac = IEEE80211_AC_BE;
1495 if (tid == IEEE80211_NUM_TIDS) {
1496 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1497 /* Drivers need to opt in to the management MPDU TXQ */
1498 if (!ieee80211_hw_check(&sdata->local->hw,
1501 } else if (!ieee80211_hw_check(&sdata->local->hw,
1503 /* Drivers need to opt in to the bufferable MMPDU TXQ */
1506 txqi->txq.ac = IEEE80211_AC_VO;
1508 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1511 txqi->txq.sta = &sta->sta;
1512 txqi->txq.tid = tid;
1513 sta->sta.txq[tid] = &txqi->txq;
1516 void ieee80211_txq_purge(struct ieee80211_local *local,
1517 struct txq_info *txqi)
1519 struct fq *fq = &local->fq;
1520 struct fq_tin *tin = &txqi->tin;
1522 spin_lock_bh(&fq->lock);
1523 fq_tin_reset(fq, tin, fq_skb_free_func);
1524 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
1525 spin_unlock_bh(&fq->lock);
1527 ieee80211_unschedule_txq(&local->hw, &txqi->txq, true);
1530 void ieee80211_txq_set_params(struct ieee80211_local *local)
1532 if (local->hw.wiphy->txq_limit)
1533 local->fq.limit = local->hw.wiphy->txq_limit;
1535 local->hw.wiphy->txq_limit = local->fq.limit;
1537 if (local->hw.wiphy->txq_memory_limit)
1538 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1540 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1542 if (local->hw.wiphy->txq_quantum)
1543 local->fq.quantum = local->hw.wiphy->txq_quantum;
1545 local->hw.wiphy->txq_quantum = local->fq.quantum;
1548 int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1550 struct fq *fq = &local->fq;
1553 bool supp_vht = false;
1554 enum nl80211_band band;
1556 if (!local->ops->wake_tx_queue)
1559 ret = fq_init(fq, 4096);
1564 * If the hardware doesn't support VHT, it is safe to limit the maximum
1565 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1567 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1568 struct ieee80211_supported_band *sband;
1570 sband = local->hw.wiphy->bands[band];
1574 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1578 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1580 codel_params_init(&local->cparams);
1581 local->cparams.interval = MS2TIME(100);
1582 local->cparams.target = MS2TIME(20);
1583 local->cparams.ecn = true;
1585 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1587 if (!local->cvars) {
1588 spin_lock_bh(&fq->lock);
1589 fq_reset(fq, fq_skb_free_func);
1590 spin_unlock_bh(&fq->lock);
1594 for (i = 0; i < fq->flows_cnt; i++)
1595 codel_vars_init(&local->cvars[i]);
1597 ieee80211_txq_set_params(local);
1602 void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1604 struct fq *fq = &local->fq;
1606 if (!local->ops->wake_tx_queue)
1609 kfree(local->cvars);
1610 local->cvars = NULL;
1612 spin_lock_bh(&fq->lock);
1613 fq_reset(fq, fq_skb_free_func);
1614 spin_unlock_bh(&fq->lock);
1617 static bool ieee80211_queue_skb(struct ieee80211_local *local,
1618 struct ieee80211_sub_if_data *sdata,
1619 struct sta_info *sta,
1620 struct sk_buff *skb)
1622 struct ieee80211_vif *vif;
1623 struct txq_info *txqi;
1625 if (!local->ops->wake_tx_queue ||
1626 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1629 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1630 sdata = container_of(sdata->bss,
1631 struct ieee80211_sub_if_data, u.ap);
1634 txqi = ieee80211_get_txq(local, vif, sta, skb);
1639 ieee80211_txq_enqueue(local, txqi, skb);
1641 schedule_and_wake_txq(local, txqi);
1646 static bool ieee80211_tx_frags(struct ieee80211_local *local,
1647 struct ieee80211_vif *vif,
1648 struct sta_info *sta,
1649 struct sk_buff_head *skbs,
1652 struct ieee80211_tx_control control = {};
1653 struct sk_buff *skb, *tmp;
1654 unsigned long flags;
1656 skb_queue_walk_safe(skbs, skb, tmp) {
1657 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1658 int q = info->hw_queue;
1660 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1661 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1662 __skb_unlink(skb, skbs);
1663 ieee80211_free_txskb(&local->hw, skb);
1668 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1669 if (local->queue_stop_reasons[q] ||
1670 (!txpending && !skb_queue_empty(&local->pending[q]))) {
1671 if (unlikely(info->flags &
1672 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1673 if (local->queue_stop_reasons[q] &
1674 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1676 * Drop off-channel frames if queues
1677 * are stopped for any reason other
1678 * than off-channel operation. Never
1681 spin_unlock_irqrestore(
1682 &local->queue_stop_reason_lock,
1684 ieee80211_purge_tx_queue(&local->hw,
1691 * Since queue is stopped, queue up frames for
1692 * later transmission from the tx-pending
1693 * tasklet when the queue is woken again.
1696 skb_queue_splice_init(skbs,
1697 &local->pending[q]);
1699 skb_queue_splice_tail_init(skbs,
1700 &local->pending[q]);
1702 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1707 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1709 info->control.vif = vif;
1710 control.sta = sta ? &sta->sta : NULL;
1712 __skb_unlink(skb, skbs);
1713 drv_tx(local, &control, skb);
1720 * Returns false if the frame couldn't be transmitted but was queued instead.
1722 static bool __ieee80211_tx(struct ieee80211_local *local,
1723 struct sk_buff_head *skbs, int led_len,
1724 struct sta_info *sta, bool txpending)
1726 struct ieee80211_tx_info *info;
1727 struct ieee80211_sub_if_data *sdata;
1728 struct ieee80211_vif *vif;
1729 struct sk_buff *skb;
1733 if (WARN_ON(skb_queue_empty(skbs)))
1736 skb = skb_peek(skbs);
1737 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1738 info = IEEE80211_SKB_CB(skb);
1739 sdata = vif_to_sdata(info->control.vif);
1740 if (sta && !sta->uploaded)
1743 switch (sdata->vif.type) {
1744 case NL80211_IFTYPE_MONITOR:
1745 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1749 sdata = rcu_dereference(local->monitor_sdata);
1753 vif->hw_queue[skb_get_queue_mapping(skb)];
1754 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1755 ieee80211_purge_tx_queue(&local->hw, skbs);
1760 case NL80211_IFTYPE_AP_VLAN:
1761 sdata = container_of(sdata->bss,
1762 struct ieee80211_sub_if_data, u.ap);
1769 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
1771 ieee80211_tpt_led_trig_tx(local, fc, led_len);
1773 WARN_ON_ONCE(!skb_queue_empty(skbs));
1779 * Invoke TX handlers, return 0 on success and non-zero if the
1780 * frame was dropped or queued.
1782 * The handlers are split into an early and late part. The latter is everything
1783 * that can be sensitive to reordering, and will be deferred to after packets
1784 * are dequeued from the intermediate queues (when they are enabled).
1786 static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1788 ieee80211_tx_result res = TX_DROP;
1790 #define CALL_TXH(txh) \
1793 if (res != TX_CONTINUE) \
1797 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1798 CALL_TXH(ieee80211_tx_h_check_assoc);
1799 CALL_TXH(ieee80211_tx_h_ps_buf);
1800 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1801 CALL_TXH(ieee80211_tx_h_select_key);
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);
1820 * Late handlers can be called while the sta lock is held. Handlers that can
1821 * cause packets to be generated will cause deadlock!
1823 static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1825 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1826 ieee80211_tx_result res = TX_CONTINUE;
1828 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1829 __skb_queue_tail(&tx->skbs, tx->skb);
1834 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1835 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1837 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1838 CALL_TXH(ieee80211_tx_h_sequence);
1839 CALL_TXH(ieee80211_tx_h_fragment);
1840 /* handlers after fragment must be aware of tx info fragmentation! */
1841 CALL_TXH(ieee80211_tx_h_stats);
1842 CALL_TXH(ieee80211_tx_h_encrypt);
1843 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1844 CALL_TXH(ieee80211_tx_h_calculate_duration);
1848 if (unlikely(res == TX_DROP)) {
1849 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1851 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1853 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1855 } else if (unlikely(res == TX_QUEUED)) {
1856 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1863 static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1865 int r = invoke_tx_handlers_early(tx);
1869 return invoke_tx_handlers_late(tx);
1872 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1873 struct ieee80211_vif *vif, struct sk_buff *skb,
1874 int band, struct ieee80211_sta **sta)
1876 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1877 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1878 struct ieee80211_tx_data tx;
1879 struct sk_buff *skb2;
1881 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
1885 info->control.vif = vif;
1886 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1888 if (invoke_tx_handlers(&tx))
1893 *sta = &tx.sta->sta;
1898 /* this function isn't suitable for fragmented data frames */
1899 skb2 = __skb_dequeue(&tx.skbs);
1900 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1901 ieee80211_free_txskb(hw, skb2);
1902 ieee80211_purge_tx_queue(hw, &tx.skbs);
1908 EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1911 * Returns false if the frame couldn't be transmitted but was queued instead.
1913 static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1914 struct sta_info *sta, struct sk_buff *skb,
1917 struct ieee80211_local *local = sdata->local;
1918 struct ieee80211_tx_data tx;
1919 ieee80211_tx_result res_prepare;
1920 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1924 if (unlikely(skb->len < 10)) {
1929 /* initialises tx */
1931 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
1933 if (unlikely(res_prepare == TX_DROP)) {
1934 ieee80211_free_txskb(&local->hw, skb);
1936 } else if (unlikely(res_prepare == TX_QUEUED)) {
1940 /* set up hw_queue value early */
1941 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1942 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1944 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1946 if (invoke_tx_handlers_early(&tx))
1949 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1952 if (!invoke_tx_handlers_late(&tx))
1953 result = __ieee80211_tx(local, &tx.skbs, led_len,
1959 /* device xmit handlers */
1961 enum ieee80211_encrypt {
1967 static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1968 struct sk_buff *skb,
1970 enum ieee80211_encrypt encrypt)
1972 struct ieee80211_local *local = sdata->local;
1976 enc_tailroom = encrypt == ENCRYPT_MGMT ||
1977 (encrypt == ENCRYPT_DATA &&
1978 sdata->crypto_tx_tailroom_needed_cnt);
1981 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1982 tail_need -= skb_tailroom(skb);
1983 tail_need = max_t(int, tail_need, 0);
1986 if (skb_cloned(skb) &&
1987 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1988 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
1989 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1990 else if (head_need || tail_need)
1991 I802_DEBUG_INC(local->tx_expand_skb_head);
1995 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
1996 wiphy_debug(local->hw.wiphy,
1997 "failed to reallocate TX buffer\n");
2004 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
2005 struct sta_info *sta, struct sk_buff *skb)
2007 struct ieee80211_local *local = sdata->local;
2008 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2009 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2011 enum ieee80211_encrypt encrypt;
2013 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
2014 encrypt = ENCRYPT_NO;
2015 else if (ieee80211_is_mgmt(hdr->frame_control))
2016 encrypt = ENCRYPT_MGMT;
2018 encrypt = ENCRYPT_DATA;
2020 headroom = local->tx_headroom;
2021 if (encrypt != ENCRYPT_NO)
2022 headroom += sdata->encrypt_headroom;
2023 headroom -= skb_headroom(skb);
2024 headroom = max_t(int, 0, headroom);
2026 if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) {
2027 ieee80211_free_txskb(&local->hw, skb);
2031 /* reload after potential resize */
2032 hdr = (struct ieee80211_hdr *) skb->data;
2033 info->control.vif = &sdata->vif;
2035 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2036 if (ieee80211_is_data(hdr->frame_control) &&
2037 is_unicast_ether_addr(hdr->addr1)) {
2038 if (mesh_nexthop_resolve(sdata, skb))
2039 return; /* skb queued: don't free */
2041 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2045 ieee80211_set_qos_hdr(sdata, skb);
2046 ieee80211_tx(sdata, sta, skb, false);
2049 static bool ieee80211_validate_radiotap_len(struct sk_buff *skb)
2051 struct ieee80211_radiotap_header *rthdr =
2052 (struct ieee80211_radiotap_header *)skb->data;
2054 /* check for not even having the fixed radiotap header part */
2055 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2056 return false; /* too short to be possibly valid */
2058 /* is it a header version we can trust to find length from? */
2059 if (unlikely(rthdr->it_version))
2060 return false; /* only version 0 is supported */
2062 /* does the skb contain enough to deliver on the alleged length? */
2063 if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data)))
2064 return false; /* skb too short for claimed rt header extent */
2069 bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
2070 struct net_device *dev)
2072 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2073 struct ieee80211_radiotap_iterator iterator;
2074 struct ieee80211_radiotap_header *rthdr =
2075 (struct ieee80211_radiotap_header *) skb->data;
2076 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2077 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2081 bool rate_found = false;
2082 u8 rate_retries = 0;
2084 u8 mcs_known, mcs_flags, mcs_bw;
2086 u8 vht_mcs = 0, vht_nss = 0;
2089 if (!ieee80211_validate_radiotap_len(skb))
2092 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2093 IEEE80211_TX_CTL_DONTFRAG;
2096 * for every radiotap entry that is present
2097 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2098 * entries present, or -EINVAL on error)
2102 ret = ieee80211_radiotap_iterator_next(&iterator);
2107 /* see if this argument is something we can use */
2108 switch (iterator.this_arg_index) {
2110 * You must take care when dereferencing iterator.this_arg
2111 * for multibyte types... the pointer is not aligned. Use
2112 * get_unaligned((type *)iterator.this_arg) to dereference
2113 * iterator.this_arg for type "type" safely on all arches.
2115 case IEEE80211_RADIOTAP_FLAGS:
2116 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2118 * this indicates that the skb we have been
2119 * handed has the 32-bit FCS CRC at the end...
2120 * we should react to that by snipping it off
2121 * because it will be recomputed and added
2124 if (skb->len < (iterator._max_length + FCS_LEN))
2127 skb_trim(skb, skb->len - FCS_LEN);
2129 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2130 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2131 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2132 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2135 case IEEE80211_RADIOTAP_TX_FLAGS:
2136 txflags = get_unaligned_le16(iterator.this_arg);
2137 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2138 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2139 if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO)
2140 info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO;
2141 if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER)
2142 info->control.flags |=
2143 IEEE80211_TX_CTRL_DONT_REORDER;
2146 case IEEE80211_RADIOTAP_RATE:
2147 rate = *iterator.this_arg;
2152 case IEEE80211_RADIOTAP_DATA_RETRIES:
2153 rate_retries = *iterator.this_arg;
2156 case IEEE80211_RADIOTAP_MCS:
2157 mcs_known = iterator.this_arg[0];
2158 mcs_flags = iterator.this_arg[1];
2159 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2163 rate = iterator.this_arg[2];
2164 rate_flags = IEEE80211_TX_RC_MCS;
2166 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2167 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2168 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2170 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2171 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2172 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2173 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2175 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_FEC &&
2176 mcs_flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC)
2177 info->flags |= IEEE80211_TX_CTL_LDPC;
2179 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_STBC) {
2180 u8 stbc = u8_get_bits(mcs_flags,
2181 IEEE80211_RADIOTAP_MCS_STBC_MASK);
2184 u32_encode_bits(stbc,
2185 IEEE80211_TX_CTL_STBC);
2189 case IEEE80211_RADIOTAP_VHT:
2190 vht_known = get_unaligned_le16(iterator.this_arg);
2193 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2194 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2195 (iterator.this_arg[2] &
2196 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2197 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2199 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2200 if (iterator.this_arg[3] == 1)
2202 IEEE80211_TX_RC_40_MHZ_WIDTH;
2203 else if (iterator.this_arg[3] == 4)
2205 IEEE80211_TX_RC_80_MHZ_WIDTH;
2206 else if (iterator.this_arg[3] == 11)
2208 IEEE80211_TX_RC_160_MHZ_WIDTH;
2211 vht_mcs = iterator.this_arg[4] >> 4;
2212 vht_nss = iterator.this_arg[4] & 0xF;
2216 * Please update the file
2217 * Documentation/networking/mac80211-injection.rst
2218 * when parsing new fields here.
2226 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2230 struct ieee80211_supported_band *sband =
2231 local->hw.wiphy->bands[info->band];
2233 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2235 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2236 info->control.rates[i].idx = -1;
2237 info->control.rates[i].flags = 0;
2238 info->control.rates[i].count = 0;
2241 if (rate_flags & IEEE80211_TX_RC_MCS) {
2242 info->control.rates[0].idx = rate;
2243 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2244 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2247 for (i = 0; i < sband->n_bitrates; i++) {
2248 if (rate * 5 != sband->bitrates[i].bitrate)
2251 info->control.rates[0].idx = i;
2256 if (info->control.rates[0].idx < 0)
2257 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2259 info->control.rates[0].flags = rate_flags;
2260 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2261 local->hw.max_rate_tries);
2267 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2268 struct net_device *dev)
2270 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2271 struct ieee80211_chanctx_conf *chanctx_conf;
2272 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2273 struct ieee80211_hdr *hdr;
2274 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2275 struct cfg80211_chan_def *chandef;
2279 memset(info, 0, sizeof(*info));
2280 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2281 IEEE80211_TX_CTL_INJECTED;
2283 /* Sanity-check the length of the radiotap header */
2284 if (!ieee80211_validate_radiotap_len(skb))
2287 /* we now know there is a radiotap header with a length we can use */
2288 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2291 * fix up the pointers accounting for the radiotap
2292 * header still being in there. We are being given
2293 * a precooked IEEE80211 header so no need for
2296 skb_set_mac_header(skb, len_rthdr);
2298 * these are just fixed to the end of the rt area since we
2299 * don't have any better information and at this point, nobody cares
2301 skb_set_network_header(skb, len_rthdr);
2302 skb_set_transport_header(skb, len_rthdr);
2304 if (skb->len < len_rthdr + 2)
2307 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2308 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2310 if (skb->len < len_rthdr + hdrlen)
2314 * Initialize skb->protocol if the injected frame is a data frame
2315 * carrying a rfc1042 header
2317 if (ieee80211_is_data(hdr->frame_control) &&
2318 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2319 u8 *payload = (u8 *)hdr + hdrlen;
2321 if (ether_addr_equal(payload, rfc1042_header))
2322 skb->protocol = cpu_to_be16((payload[6] << 8) |
2329 * We process outgoing injected frames that have a local address
2330 * we handle as though they are non-injected frames.
2331 * This code here isn't entirely correct, the local MAC address
2332 * isn't always enough to find the interface to use; for proper
2333 * VLAN support we have an nl80211-based mechanism.
2335 * This is necessary, for example, for old hostapd versions that
2336 * don't use nl80211-based management TX/RX.
2338 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2340 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2341 if (!ieee80211_sdata_running(tmp_sdata))
2343 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2344 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2346 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
2352 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2353 if (!chanctx_conf) {
2354 tmp_sdata = rcu_dereference(local->monitor_sdata);
2357 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2361 chandef = &chanctx_conf->def;
2362 else if (!local->use_chanctx)
2363 chandef = &local->_oper_chandef;
2368 * Frame injection is not allowed if beaconing is not allowed
2369 * or if we need radar detection. Beaconing is usually not allowed when
2370 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2371 * Passive scan is also used in world regulatory domains where
2372 * your country is not known and as such it should be treated as
2373 * NO TX unless the channel is explicitly allowed in which case
2374 * your current regulatory domain would not have the passive scan
2377 * Since AP mode uses monitor interfaces to inject/TX management
2378 * frames we can make AP mode the exception to this rule once it
2379 * supports radar detection as its implementation can deal with
2380 * radar detection by itself. We can do that later by adding a
2381 * monitor flag interfaces used for AP support.
2383 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2387 info->band = chandef->chan->band;
2389 /* Initialize skb->priority according to frame type and TID class,
2390 * with respect to the sub interface that the frame will actually
2391 * be transmitted on. If the DONT_REORDER flag is set, the original
2392 * skb-priority is preserved to assure frames injected with this
2393 * flag are not reordered relative to each other.
2395 ieee80211_select_queue_80211(sdata, skb, hdr);
2396 skb_set_queue_mapping(skb, ieee80211_ac_from_tid(skb->priority));
2399 * Process the radiotap header. This will now take into account the
2400 * selected chandef above to accurately set injection rates and
2403 if (!ieee80211_parse_tx_radiotap(skb, dev))
2406 /* remove the injection radiotap header */
2407 skb_pull(skb, len_rthdr);
2409 ieee80211_xmit(sdata, NULL, skb);
2412 return NETDEV_TX_OK;
2418 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
2421 static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2423 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2425 return ethertype == ETH_P_TDLS &&
2427 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2430 int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2431 struct sk_buff *skb,
2432 struct sta_info **sta_out)
2434 struct sta_info *sta;
2436 switch (sdata->vif.type) {
2437 case NL80211_IFTYPE_AP_VLAN:
2438 sta = rcu_dereference(sdata->u.vlan.sta);
2442 } else if (sdata->wdev.use_4addr) {
2446 case NL80211_IFTYPE_AP:
2447 case NL80211_IFTYPE_OCB:
2448 case NL80211_IFTYPE_ADHOC:
2449 if (is_multicast_ether_addr(skb->data)) {
2450 *sta_out = ERR_PTR(-ENOENT);
2453 sta = sta_info_get_bss(sdata, skb->data);
2455 #ifdef CONFIG_MAC80211_MESH
2456 case NL80211_IFTYPE_MESH_POINT:
2457 /* determined much later */
2461 case NL80211_IFTYPE_STATION:
2462 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2463 sta = sta_info_get(sdata, skb->data);
2464 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2465 if (test_sta_flag(sta,
2466 WLAN_STA_TDLS_PEER_AUTH)) {
2472 * TDLS link during setup - throw out frames to
2473 * peer. Allow TDLS-setup frames to unauthorized
2474 * peers for the special case of a link teardown
2475 * after a TDLS sta is removed due to being
2478 if (!ieee80211_is_tdls_setup(skb))
2484 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2492 *sta_out = sta ?: ERR_PTR(-ENOENT);
2496 static u16 ieee80211_store_ack_skb(struct ieee80211_local *local,
2497 struct sk_buff *skb,
2501 struct sk_buff *ack_skb;
2505 ack_skb = skb_clone_sk(skb);
2507 ack_skb = skb_clone(skb, GFP_ATOMIC);
2510 unsigned long flags;
2513 spin_lock_irqsave(&local->ack_status_lock, flags);
2514 id = idr_alloc(&local->ack_status_frames, ack_skb,
2515 1, 0x2000, GFP_ATOMIC);
2516 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2520 *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2522 *cookie = ieee80211_mgmt_tx_cookie(local);
2523 IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
2534 * ieee80211_build_hdr - build 802.11 header in the given frame
2535 * @sdata: virtual interface to build the header for
2536 * @skb: the skb to build the header in
2537 * @info_flags: skb flags to set
2538 * @sta: the station pointer
2539 * @ctrl_flags: info control flags to set
2540 * @cookie: cookie pointer to fill (if not %NULL)
2542 * This function takes the skb with 802.3 header and reformats the header to
2543 * the appropriate IEEE 802.11 header based on which interface the packet is
2544 * being transmitted on.
2546 * Note that this function also takes care of the TX status request and
2547 * potential unsharing of the SKB - this needs to be interleaved with the
2550 * The function requires the read-side RCU lock held
2552 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2554 static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2555 struct sk_buff *skb, u32 info_flags,
2556 struct sta_info *sta, u32 ctrl_flags,
2559 struct ieee80211_local *local = sdata->local;
2560 struct ieee80211_tx_info *info;
2562 u16 ethertype, hdrlen, meshhdrlen = 0;
2564 struct ieee80211_hdr hdr;
2565 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2566 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2567 const u8 *encaps_data;
2568 int encaps_len, skip_header_bytes;
2569 bool wme_sta = false, authorized = false;
2573 struct ieee80211_chanctx_conf *chanctx_conf;
2574 struct ieee80211_sub_if_data *ap_sdata;
2575 enum nl80211_band band;
2581 #ifdef CONFIG_MAC80211_DEBUGFS
2582 if (local->force_tx_status)
2583 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2586 /* convert Ethernet header to proper 802.11 header (based on
2587 * operation mode) */
2588 ethertype = (skb->data[12] << 8) | skb->data[13];
2589 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2591 switch (sdata->vif.type) {
2592 case NL80211_IFTYPE_AP_VLAN:
2593 if (sdata->wdev.use_4addr) {
2594 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2596 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2597 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2598 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2599 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2601 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2602 wme_sta = sta->sta.wme;
2604 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2606 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
2607 if (!chanctx_conf) {
2611 band = chanctx_conf->def.chan->band;
2612 if (sdata->wdev.use_4addr)
2615 case NL80211_IFTYPE_AP:
2616 if (sdata->vif.type == NL80211_IFTYPE_AP)
2617 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2618 if (!chanctx_conf) {
2622 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2624 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2625 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2626 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2628 band = chanctx_conf->def.chan->band;
2630 #ifdef CONFIG_MAC80211_MESH
2631 case NL80211_IFTYPE_MESH_POINT:
2632 if (!is_multicast_ether_addr(skb->data)) {
2633 struct sta_info *next_hop;
2634 bool mpp_lookup = true;
2636 mpath = mesh_path_lookup(sdata, skb->data);
2639 next_hop = rcu_dereference(mpath->next_hop);
2641 !(mpath->flags & (MESH_PATH_ACTIVE |
2642 MESH_PATH_RESOLVING)))
2647 mppath = mpp_path_lookup(sdata, skb->data);
2649 mppath->exp_time = jiffies;
2652 if (mppath && mpath)
2653 mesh_path_del(sdata, mpath->dst);
2657 * Use address extension if it is a packet from
2658 * another interface or if we know the destination
2659 * is being proxied by a portal (i.e. portal address
2660 * differs from proxied address)
2662 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2663 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
2664 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2665 skb->data, skb->data + ETH_ALEN);
2666 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2669 /* DS -> MBSS (802.11-2012 13.11.3.3).
2670 * For unicast with unknown forwarding information,
2671 * destination might be in the MBSS or if that fails
2672 * forwarded to another mesh gate. In either case
2673 * resolution will be handled in ieee80211_xmit(), so
2674 * leave the original DA. This also works for mcast */
2675 const u8 *mesh_da = skb->data;
2678 mesh_da = mppath->mpp;
2680 mesh_da = mpath->dst;
2682 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2683 mesh_da, sdata->vif.addr);
2684 if (is_multicast_ether_addr(mesh_da))
2685 /* DA TA mSA AE:SA */
2686 meshhdrlen = ieee80211_new_mesh_header(
2688 skb->data + ETH_ALEN, NULL);
2690 /* RA TA mDA mSA AE:DA SA */
2691 meshhdrlen = ieee80211_new_mesh_header(
2692 sdata, &mesh_hdr, skb->data,
2693 skb->data + ETH_ALEN);
2696 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2697 if (!chanctx_conf) {
2701 band = chanctx_conf->def.chan->band;
2703 /* For injected frames, fill RA right away as nexthop lookup
2706 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2707 is_zero_ether_addr(hdr.addr1))
2708 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2711 case NL80211_IFTYPE_STATION:
2712 /* we already did checks when looking up the RA STA */
2713 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
2717 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2718 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2719 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2721 } else if (sdata->u.mgd.use_4addr &&
2722 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2723 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2724 IEEE80211_FCTL_TODS);
2726 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2727 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2728 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2729 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2732 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2734 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2735 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2736 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2739 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2740 if (!chanctx_conf) {
2744 band = chanctx_conf->def.chan->band;
2746 case NL80211_IFTYPE_OCB:
2748 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2749 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2750 eth_broadcast_addr(hdr.addr3);
2752 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2753 if (!chanctx_conf) {
2757 band = chanctx_conf->def.chan->band;
2759 case NL80211_IFTYPE_ADHOC:
2761 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2762 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2763 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2765 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2766 if (!chanctx_conf) {
2770 band = chanctx_conf->def.chan->band;
2777 multicast = is_multicast_ether_addr(hdr.addr1);
2779 /* sta is always NULL for mesh */
2781 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2782 wme_sta = sta->sta.wme;
2783 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2784 /* For mesh, the use of the QoS header is mandatory */
2788 /* receiver does QoS (which also means we do) use it */
2790 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2795 * Drop unicast frames to unauthorised stations unless they are
2796 * EAPOL frames from the local station.
2798 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2799 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2800 !multicast && !authorized &&
2801 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2802 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
2803 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2804 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2805 sdata->name, hdr.addr1);
2808 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2814 if (unlikely(!multicast && ((skb->sk &&
2815 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) ||
2816 ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS)))
2817 info_id = ieee80211_store_ack_skb(local, skb, &info_flags,
2821 * If the skb is shared we need to obtain our own copy.
2823 if (skb_shared(skb)) {
2824 struct sk_buff *tmp_skb = skb;
2826 /* can't happen -- skb is a clone if info_id != 0 */
2829 skb = skb_clone(skb, GFP_ATOMIC);
2838 hdr.frame_control = fc;
2839 hdr.duration_id = 0;
2842 skip_header_bytes = ETH_HLEN;
2843 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2844 encaps_data = bridge_tunnel_header;
2845 encaps_len = sizeof(bridge_tunnel_header);
2846 skip_header_bytes -= 2;
2847 } else if (ethertype >= ETH_P_802_3_MIN) {
2848 encaps_data = rfc1042_header;
2849 encaps_len = sizeof(rfc1042_header);
2850 skip_header_bytes -= 2;
2856 skb_pull(skb, skip_header_bytes);
2857 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2860 * So we need to modify the skb header and hence need a copy of
2861 * that. The head_need variable above doesn't, so far, include
2862 * the needed header space that we don't need right away. If we
2863 * can, then we don't reallocate right now but only after the
2864 * frame arrives at the master device (if it does...)
2866 * If we cannot, however, then we will reallocate to include all
2867 * the ever needed space. Also, if we need to reallocate it anyway,
2868 * make it big enough for everything we may ever need.
2871 if (head_need > 0 || skb_cloned(skb)) {
2872 head_need += sdata->encrypt_headroom;
2873 head_need += local->tx_headroom;
2874 head_need = max_t(int, 0, head_need);
2875 if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) {
2876 ieee80211_free_txskb(&local->hw, skb);
2878 return ERR_PTR(-ENOMEM);
2883 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2885 #ifdef CONFIG_MAC80211_MESH
2887 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2890 if (ieee80211_is_data_qos(fc)) {
2891 __le16 *qos_control;
2893 qos_control = skb_push(skb, 2);
2894 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2896 * Maybe we could actually set some fields here, for now just
2897 * initialise to zero to indicate no special operation.
2901 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2903 skb_reset_mac_header(skb);
2905 info = IEEE80211_SKB_CB(skb);
2906 memset(info, 0, sizeof(*info));
2908 info->flags = info_flags;
2909 info->ack_frame_id = info_id;
2911 info->control.flags = ctrl_flags;
2916 return ERR_PTR(ret);
2920 * fast-xmit overview
2922 * The core idea of this fast-xmit is to remove per-packet checks by checking
2923 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2924 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2925 * much less work can be done per packet. For example, fragmentation must be
2926 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2929 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2930 * header and other data to aid packet processing in ieee80211_xmit_fast().
2932 * The most difficult part of this is that when any of these assumptions
2933 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2934 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2935 * since the per-packet code no longer checks the conditions. This is reflected
2936 * by the calls to these functions throughout the rest of the code, and must be
2937 * maintained if any of the TX path checks change.
2940 void ieee80211_check_fast_xmit(struct sta_info *sta)
2942 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2943 struct ieee80211_local *local = sta->local;
2944 struct ieee80211_sub_if_data *sdata = sta->sdata;
2945 struct ieee80211_hdr *hdr = (void *)build.hdr;
2946 struct ieee80211_chanctx_conf *chanctx_conf;
2949 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
2952 /* Locking here protects both the pointer itself, and against concurrent
2953 * invocations winning data access races to, e.g., the key pointer that
2955 * Without it, the invocation of this function right after the key
2956 * pointer changes wouldn't be sufficient, as another CPU could access
2957 * the pointer, then stall, and then do the cache update after the CPU
2958 * that invalidated the key.
2959 * With the locking, such scenarios cannot happen as the check for the
2960 * key and the fast-tx assignment are done atomically, so the CPU that
2961 * modifies the key will either wait or other one will see the key
2962 * cleared/changed already.
2964 spin_lock_bh(&sta->lock);
2965 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2966 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2967 sdata->vif.type == NL80211_IFTYPE_STATION)
2970 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2973 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2974 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2975 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2976 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
2979 if (sdata->noack_map)
2982 /* fast-xmit doesn't handle fragmentation at all */
2983 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2984 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
2988 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2989 if (!chanctx_conf) {
2993 build.band = chanctx_conf->def.chan->band;
2996 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2998 switch (sdata->vif.type) {
2999 case NL80211_IFTYPE_ADHOC:
3001 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3002 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3003 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
3006 case NL80211_IFTYPE_STATION:
3007 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
3009 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3010 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3011 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
3016 if (sdata->u.mgd.use_4addr) {
3017 /* non-regular ethertype cannot use the fastpath */
3018 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3019 IEEE80211_FCTL_TODS);
3021 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
3022 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3023 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3024 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3028 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
3030 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
3031 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3032 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3035 case NL80211_IFTYPE_AP_VLAN:
3036 if (sdata->wdev.use_4addr) {
3037 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3038 IEEE80211_FCTL_TODS);
3040 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
3041 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3042 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3043 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3048 case NL80211_IFTYPE_AP:
3049 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
3051 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3052 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3053 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
3057 /* not handled on fast-xmit */
3063 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3066 /* We store the key here so there's no point in using rcu_dereference()
3067 * but that's fine because the code that changes the pointers will call
3068 * this function after doing so. For a single CPU that would be enough,
3069 * for multiple see the comment above.
3071 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3073 build.key = rcu_access_pointer(sdata->default_unicast_key);
3075 bool gen_iv, iv_spc, mmic;
3077 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3078 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
3079 mmic = build.key->conf.flags &
3080 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3081 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3083 /* don't handle software crypto */
3084 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3087 /* Key is being removed */
3088 if (build.key->flags & KEY_FLAG_TAINTED)
3091 switch (build.key->conf.cipher) {
3092 case WLAN_CIPHER_SUITE_CCMP:
3093 case WLAN_CIPHER_SUITE_CCMP_256:
3095 build.pn_offs = build.hdr_len;
3096 if (gen_iv || iv_spc)
3097 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3099 case WLAN_CIPHER_SUITE_GCMP:
3100 case WLAN_CIPHER_SUITE_GCMP_256:
3102 build.pn_offs = build.hdr_len;
3103 if (gen_iv || iv_spc)
3104 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3106 case WLAN_CIPHER_SUITE_TKIP:
3107 /* cannot handle MMIC or IV generation in xmit-fast */
3111 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3113 case WLAN_CIPHER_SUITE_WEP40:
3114 case WLAN_CIPHER_SUITE_WEP104:
3115 /* cannot handle IV generation in fast-xmit */
3119 build.hdr_len += IEEE80211_WEP_IV_LEN;
3121 case WLAN_CIPHER_SUITE_AES_CMAC:
3122 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3123 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3124 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3126 "management cipher suite 0x%x enabled for data\n",
3127 build.key->conf.cipher);
3130 /* we don't know how to generate IVs for this at all */
3131 if (WARN_ON(gen_iv))
3133 /* pure hardware keys are OK, of course */
3134 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3136 /* cipher scheme might require space allocation */
3138 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3141 build.hdr_len += build.key->conf.iv_len;
3144 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3147 hdr->frame_control = fc;
3149 memcpy(build.hdr + build.hdr_len,
3150 rfc1042_header, sizeof(rfc1042_header));
3151 build.hdr_len += sizeof(rfc1042_header);
3153 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3154 /* if the kmemdup fails, continue w/o fast_tx */
3159 /* we might have raced against another call to this function */
3160 old = rcu_dereference_protected(sta->fast_tx,
3161 lockdep_is_held(&sta->lock));
3162 rcu_assign_pointer(sta->fast_tx, fast_tx);
3164 kfree_rcu(old, rcu_head);
3165 spin_unlock_bh(&sta->lock);
3168 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3170 struct sta_info *sta;
3173 list_for_each_entry_rcu(sta, &local->sta_list, list)
3174 ieee80211_check_fast_xmit(sta);
3178 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3180 struct ieee80211_local *local = sdata->local;
3181 struct sta_info *sta;
3185 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3186 if (sdata != sta->sdata &&
3187 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3189 ieee80211_check_fast_xmit(sta);
3195 void ieee80211_clear_fast_xmit(struct sta_info *sta)
3197 struct ieee80211_fast_tx *fast_tx;
3199 spin_lock_bh(&sta->lock);
3200 fast_tx = rcu_dereference_protected(sta->fast_tx,
3201 lockdep_is_held(&sta->lock));
3202 RCU_INIT_POINTER(sta->fast_tx, NULL);
3203 spin_unlock_bh(&sta->lock);
3206 kfree_rcu(fast_tx, rcu_head);
3209 static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3210 struct sk_buff *skb, int headroom)
3212 if (skb_headroom(skb) < headroom) {
3213 I802_DEBUG_INC(local->tx_expand_skb_head);
3215 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
3216 wiphy_debug(local->hw.wiphy,
3217 "failed to reallocate TX buffer\n");
3225 static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3226 struct ieee80211_fast_tx *fast_tx,
3227 struct sk_buff *skb)
3229 struct ieee80211_local *local = sdata->local;
3230 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3231 struct ieee80211_hdr *hdr;
3232 struct ethhdr *amsdu_hdr;
3233 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3234 int subframe_len = skb->len - hdr_len;
3236 u8 *qc, *h_80211_src, *h_80211_dst;
3239 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3242 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3245 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr)))
3248 data = skb_push(skb, sizeof(*amsdu_hdr));
3249 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3251 amsdu_hdr = data + hdr_len;
3252 /* h_80211_src/dst is addr* field within hdr */
3253 h_80211_src = data + fast_tx->sa_offs;
3254 h_80211_dst = data + fast_tx->da_offs;
3256 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3257 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3258 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3260 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3261 * fields needs to be changed to BSSID for A-MSDU frames depending
3262 * on FromDS/ToDS values.
3264 switch (sdata->vif.type) {
3265 case NL80211_IFTYPE_STATION:
3266 bssid = sdata->u.mgd.bssid;
3268 case NL80211_IFTYPE_AP:
3269 case NL80211_IFTYPE_AP_VLAN:
3270 bssid = sdata->vif.addr;
3276 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3277 ether_addr_copy(h_80211_src, bssid);
3279 if (bssid && ieee80211_has_tods(hdr->frame_control))
3280 ether_addr_copy(h_80211_dst, bssid);
3282 qc = ieee80211_get_qos_ctl(hdr);
3283 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3285 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3290 static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3291 struct sta_info *sta,
3292 struct ieee80211_fast_tx *fast_tx,
3293 struct sk_buff *skb)
3295 struct ieee80211_local *local = sdata->local;
3296 struct fq *fq = &local->fq;
3298 struct fq_flow *flow;
3299 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3300 struct ieee80211_txq *txq = sta->sta.txq[tid];
3301 struct txq_info *txqi;
3302 struct sk_buff **frag_tail, *head;
3303 int subframe_len = skb->len - ETH_ALEN;
3304 u8 max_subframes = sta->sta.max_amsdu_subframes;
3305 int max_frags = local->hw.max_tx_fragments;
3306 int max_amsdu_len = sta->sta.max_amsdu_len;
3312 unsigned int orig_len;
3313 int n = 2, nfrags, pad = 0;
3316 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3319 if (sdata->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED)
3322 if (skb_is_gso(skb))
3328 txqi = to_txq_info(txq);
3329 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3332 if (sta->sta.max_rc_amsdu_len)
3333 max_amsdu_len = min_t(int, max_amsdu_len,
3334 sta->sta.max_rc_amsdu_len);
3336 if (sta->sta.max_tid_amsdu_len[tid])
3337 max_amsdu_len = min_t(int, max_amsdu_len,
3338 sta->sta.max_tid_amsdu_len[tid]);
3340 flow_idx = fq_flow_idx(fq, skb);
3342 spin_lock_bh(&fq->lock);
3344 /* TODO: Ideally aggregation should be done on dequeue to remain
3345 * responsive to environment changes.
3349 flow = fq_flow_classify(fq, tin, flow_idx, skb);
3350 head = skb_peek_tail(&flow->queue);
3351 if (!head || skb_is_gso(head))
3354 orig_truesize = head->truesize;
3355 orig_len = head->len;
3357 if (skb->len + head->len > max_amsdu_len)
3360 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3361 nfrags += 1 + skb_shinfo(head)->nr_frags;
3362 frag_tail = &skb_shinfo(head)->frag_list;
3363 while (*frag_tail) {
3364 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3365 frag_tail = &(*frag_tail)->next;
3369 if (max_subframes && n > max_subframes)
3372 if (max_frags && nfrags > max_frags)
3375 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3378 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3382 * Pad out the previous subframe to a multiple of 4 by adding the
3383 * padding to the next one, that's being added. Note that head->len
3384 * is the length of the full A-MSDU, but that works since each time
3385 * we add a new subframe we pad out the previous one to a multiple
3386 * of 4 and thus it no longer matters in the next round.
3388 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3389 if ((head->len - hdrlen) & 3)
3390 pad = 4 - ((head->len - hdrlen) & 3);
3392 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
3397 data = skb_push(skb, ETH_ALEN + 2);
3398 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3400 data += 2 * ETH_ALEN;
3401 len = cpu_to_be16(subframe_len);
3402 memcpy(data, &len, 2);
3403 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3405 memset(skb_push(skb, pad), 0, pad);
3407 head->len += skb->len;
3408 head->data_len += skb->len;
3412 fq->memory_usage += head->truesize - orig_truesize;
3413 if (head->len != orig_len) {
3414 flow->backlog += head->len - orig_len;
3415 tin->backlog_bytes += head->len - orig_len;
3418 spin_unlock_bh(&fq->lock);
3424 * Can be called while the sta lock is held. Anything that can cause packets to
3425 * be generated will cause deadlock!
3427 static ieee80211_tx_result
3428 ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3429 struct sta_info *sta, u8 pn_offs,
3430 struct ieee80211_key *key,
3431 struct ieee80211_tx_data *tx)
3433 struct sk_buff *skb = tx->skb;
3434 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3435 struct ieee80211_hdr *hdr = (void *)skb->data;
3436 u8 tid = IEEE80211_NUM_TIDS;
3438 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL) &&
3439 ieee80211_tx_h_rate_ctrl(tx) != TX_CONTINUE)
3443 info->control.hw_key = &key->conf;
3445 dev_sw_netstats_tx_add(skb->dev, 1, skb->len);
3447 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3448 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3449 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3451 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3452 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3453 sdata->sequence_number += 0x10;
3456 if (skb_shinfo(skb)->gso_size)
3457 sta->tx_stats.msdu[tid] +=
3458 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3460 sta->tx_stats.msdu[tid]++;
3462 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3464 /* statistics normally done by ieee80211_tx_h_stats (but that
3465 * has to consider fragmentation, so is more complex)
3467 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3468 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3472 u8 *crypto_hdr = skb->data + pn_offs;
3474 switch (key->conf.cipher) {
3475 case WLAN_CIPHER_SUITE_CCMP:
3476 case WLAN_CIPHER_SUITE_CCMP_256:
3477 case WLAN_CIPHER_SUITE_GCMP:
3478 case WLAN_CIPHER_SUITE_GCMP_256:
3479 pn = atomic64_inc_return(&key->conf.tx_pn);
3481 crypto_hdr[1] = pn >> 8;
3482 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3483 crypto_hdr[4] = pn >> 16;
3484 crypto_hdr[5] = pn >> 24;
3485 crypto_hdr[6] = pn >> 32;
3486 crypto_hdr[7] = pn >> 40;
3494 static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3495 struct sta_info *sta,
3496 struct ieee80211_fast_tx *fast_tx,
3497 struct sk_buff *skb)
3499 struct ieee80211_local *local = sdata->local;
3500 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3501 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3502 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3504 struct ieee80211_tx_info *info;
3505 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3506 struct ieee80211_tx_data tx;
3507 ieee80211_tx_result r;
3508 struct tid_ampdu_tx *tid_tx = NULL;
3509 u8 tid = IEEE80211_NUM_TIDS;
3511 /* control port protocol needs a lot of special handling */
3512 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3515 /* only RFC 1042 SNAP */
3516 if (ethertype < ETH_P_802_3_MIN)
3519 /* don't handle TX status request here either */
3520 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3523 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3524 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3525 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3527 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3529 if (tid_tx->timeout)
3530 tid_tx->last_tx = jiffies;
3534 /* after this point (skb is modified) we cannot return false */
3536 if (skb_shared(skb)) {
3537 struct sk_buff *tmp_skb = skb;
3539 skb = skb_clone(skb, GFP_ATOMIC);
3546 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3547 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3550 /* will not be crypto-handled beyond what we do here, so use false
3551 * as the may-encrypt argument for the resize to not account for
3552 * more room than we already have in 'extra_head'
3554 if (unlikely(ieee80211_skb_resize(sdata, skb,
3555 max_t(int, extra_head + hw_headroom -
3556 skb_headroom(skb), 0),
3562 memcpy(ð, skb->data, ETH_HLEN - 2);
3563 hdr = skb_push(skb, extra_head);
3564 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3565 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3566 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3568 info = IEEE80211_SKB_CB(skb);
3569 memset(info, 0, sizeof(*info));
3570 info->band = fast_tx->band;
3571 info->control.vif = &sdata->vif;
3572 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3573 IEEE80211_TX_CTL_DONTFRAG |
3574 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3575 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
3577 #ifdef CONFIG_MAC80211_DEBUGFS
3578 if (local->force_tx_status)
3579 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3582 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3583 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3584 *ieee80211_get_qos_ctl(hdr) = tid;
3587 __skb_queue_head_init(&tx.skbs);
3589 tx.flags = IEEE80211_TX_UNICAST;
3593 tx.key = fast_tx->key;
3595 if (ieee80211_queue_skb(local, sdata, sta, skb))
3599 r = ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3607 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3608 sdata = container_of(sdata->bss,
3609 struct ieee80211_sub_if_data, u.ap);
3611 __skb_queue_tail(&tx.skbs, skb);
3612 ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false);
3616 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3617 struct ieee80211_txq *txq)
3619 struct ieee80211_local *local = hw_to_local(hw);
3620 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3621 struct ieee80211_hdr *hdr;
3622 struct sk_buff *skb = NULL;
3623 struct fq *fq = &local->fq;
3624 struct fq_tin *tin = &txqi->tin;
3625 struct ieee80211_tx_info *info;
3626 struct ieee80211_tx_data tx;
3627 ieee80211_tx_result r;
3628 struct ieee80211_vif *vif = txq->vif;
3630 WARN_ON_ONCE(softirq_count() == 0);
3632 if (!ieee80211_txq_airtime_check(hw, txq))
3636 spin_lock_bh(&fq->lock);
3638 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) ||
3639 test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags))
3642 if (vif->txqs_stopped[txq->ac]) {
3643 set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags);
3647 /* Make sure fragments stay together. */
3648 skb = __skb_dequeue(&txqi->frags);
3649 if (unlikely(skb)) {
3650 if (!(IEEE80211_SKB_CB(skb)->control.flags &
3651 IEEE80211_TX_INTCFL_NEED_TXPROCESSING))
3653 IEEE80211_SKB_CB(skb)->control.flags &=
3654 ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
3656 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3662 spin_unlock_bh(&fq->lock);
3664 hdr = (struct ieee80211_hdr *)skb->data;
3665 info = IEEE80211_SKB_CB(skb);
3667 memset(&tx, 0, sizeof(tx));
3668 __skb_queue_head_init(&tx.skbs);
3671 tx.sdata = vif_to_sdata(info->control.vif);
3674 tx.sta = container_of(txq->sta, struct sta_info, sta);
3676 * Drop unicast frames to unauthorised stations unless they are
3677 * injected frames or EAPOL frames from the local station.
3679 if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
3680 ieee80211_is_data(hdr->frame_control) &&
3681 !ieee80211_vif_is_mesh(&tx.sdata->vif) &&
3682 tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3683 !is_multicast_ether_addr(hdr->addr1) &&
3684 !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3685 (!(info->control.flags &
3686 IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3687 !ether_addr_equal(tx.sdata->vif.addr,
3689 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3690 ieee80211_free_txskb(&local->hw, skb);
3696 * The key can be removed while the packet was queued, so need to call
3697 * this here to get the current key.
3699 r = ieee80211_tx_h_select_key(&tx);
3700 if (r != TX_CONTINUE) {
3701 ieee80211_free_txskb(&local->hw, skb);
3705 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3706 info->flags |= IEEE80211_TX_CTL_AMPDU;
3708 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3710 if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
3711 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3712 r = ieee80211_tx_h_rate_ctrl(&tx);
3713 if (r != TX_CONTINUE) {
3714 ieee80211_free_txskb(&local->hw, skb);
3721 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3722 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3727 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3728 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3730 r = ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3732 if (r != TX_CONTINUE) {
3733 ieee80211_free_txskb(&local->hw, skb);
3737 if (invoke_tx_handlers_late(&tx))
3740 skb = __skb_dequeue(&tx.skbs);
3742 if (!skb_queue_empty(&tx.skbs)) {
3743 spin_lock_bh(&fq->lock);
3744 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
3745 spin_unlock_bh(&fq->lock);
3749 if (skb_has_frag_list(skb) &&
3750 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3751 if (skb_linearize(skb)) {
3752 ieee80211_free_txskb(&local->hw, skb);
3757 switch (tx.sdata->vif.type) {
3758 case NL80211_IFTYPE_MONITOR:
3759 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3760 vif = &tx.sdata->vif;
3763 tx.sdata = rcu_dereference(local->monitor_sdata);
3765 vif = &tx.sdata->vif;
3767 vif->hw_queue[skb_get_queue_mapping(skb)];
3768 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3769 ieee80211_free_txskb(&local->hw, skb);
3775 case NL80211_IFTYPE_AP_VLAN:
3776 tx.sdata = container_of(tx.sdata->bss,
3777 struct ieee80211_sub_if_data, u.ap);
3780 vif = &tx.sdata->vif;
3785 IEEE80211_SKB_CB(skb)->control.vif = vif;
3788 wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) {
3789 bool ampdu = txq->ac != IEEE80211_AC_VO;
3792 airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta,
3795 airtime = ieee80211_info_set_tx_time_est(info, airtime);
3796 ieee80211_sta_update_pending_airtime(local, tx.sta,
3806 spin_unlock_bh(&fq->lock);
3810 EXPORT_SYMBOL(ieee80211_tx_dequeue);
3812 struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
3814 struct ieee80211_local *local = hw_to_local(hw);
3815 struct airtime_sched_info *air_sched;
3816 u64 now = ktime_get_boottime_ns();
3817 struct ieee80211_txq *ret = NULL;
3818 struct airtime_info *air_info;
3819 struct txq_info *txqi = NULL;
3820 struct rb_node *node;
3823 air_sched = &local->airtime[ac];
3824 spin_lock_bh(&air_sched->lock);
3826 node = air_sched->schedule_pos;
3830 node = rb_first_cached(&air_sched->active_txqs);
3833 node = rb_next(node);
3839 txqi = container_of(node, struct txq_info, schedule_order);
3840 air_info = to_airtime_info(&txqi->txq);
3842 if (air_info->v_t > air_sched->v_t &&
3843 (!first || !airtime_catchup_v_t(air_sched, air_info->v_t, now)))
3846 if (!ieee80211_txq_airtime_check(hw, &txqi->txq)) {
3851 air_sched->schedule_pos = node;
3852 air_sched->last_schedule_activity = now;
3855 spin_unlock_bh(&air_sched->lock);
3858 EXPORT_SYMBOL(ieee80211_next_txq);
3860 static void __ieee80211_insert_txq(struct rb_root_cached *root,
3861 struct txq_info *txqi)
3863 struct rb_node **new = &root->rb_root.rb_node;
3864 struct airtime_info *old_air, *new_air;
3865 struct rb_node *parent = NULL;
3866 struct txq_info *__txqi;
3867 bool leftmost = true;
3871 __txqi = rb_entry(parent, struct txq_info, schedule_order);
3872 old_air = to_airtime_info(&__txqi->txq);
3873 new_air = to_airtime_info(&txqi->txq);
3875 if (new_air->v_t <= old_air->v_t) {
3876 new = &parent->rb_left;
3878 new = &parent->rb_right;
3883 rb_link_node(&txqi->schedule_order, parent, new);
3884 rb_insert_color_cached(&txqi->schedule_order, root, leftmost);
3887 void ieee80211_resort_txq(struct ieee80211_hw *hw,
3888 struct ieee80211_txq *txq)
3890 struct airtime_info *air_info = to_airtime_info(txq);
3891 struct ieee80211_local *local = hw_to_local(hw);
3892 struct txq_info *txqi = to_txq_info(txq);
3893 struct airtime_sched_info *air_sched;
3895 air_sched = &local->airtime[txq->ac];
3897 lockdep_assert_held(&air_sched->lock);
3899 if (!RB_EMPTY_NODE(&txqi->schedule_order)) {
3900 struct airtime_info *a_prev = NULL, *a_next = NULL;
3901 struct txq_info *t_prev, *t_next;
3902 struct rb_node *n_prev, *n_next;
3904 /* Erasing a node can cause an expensive rebalancing operation,
3905 * so we check the previous and next nodes first and only remove
3906 * and re-insert if the current node is not already in the
3909 if ((n_prev = rb_prev(&txqi->schedule_order)) != NULL) {
3910 t_prev = container_of(n_prev, struct txq_info,
3912 a_prev = to_airtime_info(&t_prev->txq);
3915 if ((n_next = rb_next(&txqi->schedule_order)) != NULL) {
3916 t_next = container_of(n_next, struct txq_info,
3918 a_next = to_airtime_info(&t_next->txq);
3921 if ((!a_prev || a_prev->v_t <= air_info->v_t) &&
3922 (!a_next || a_next->v_t > air_info->v_t))
3925 if (air_sched->schedule_pos == &txqi->schedule_order)
3926 air_sched->schedule_pos = n_prev;
3928 rb_erase_cached(&txqi->schedule_order,
3929 &air_sched->active_txqs);
3930 RB_CLEAR_NODE(&txqi->schedule_order);
3931 __ieee80211_insert_txq(&air_sched->active_txqs, txqi);
3935 void ieee80211_update_airtime_weight(struct ieee80211_local *local,
3936 struct airtime_sched_info *air_sched,
3937 u64 now, bool force)
3939 struct airtime_info *air_info, *tmp;
3943 now = ktime_get_boottime_ns();
3945 lockdep_assert_held(&air_sched->lock);
3947 if (!force && (air_sched->last_weight_update <
3948 now - AIRTIME_ACTIVE_DURATION))
3951 list_for_each_entry_safe(air_info, tmp,
3952 &air_sched->active_list, list) {
3953 if (airtime_is_active(air_info, now))
3954 weight_sum += air_info->weight;
3956 list_del_init(&air_info->list);
3958 airtime_weight_sum_set(air_sched, weight_sum);
3959 air_sched->last_weight_update = now;
3962 void ieee80211_schedule_txq(struct ieee80211_hw *hw,
3963 struct ieee80211_txq *txq)
3964 __acquires(txq_lock) __releases(txq_lock)
3966 struct ieee80211_local *local = hw_to_local(hw);
3967 struct txq_info *txqi = to_txq_info(txq);
3968 struct airtime_sched_info *air_sched;
3969 u64 now = ktime_get_boottime_ns();
3970 struct airtime_info *air_info;
3974 air_sched = &local->airtime[ac];
3975 air_info = to_airtime_info(txq);
3977 spin_lock_bh(&air_sched->lock);
3978 was_active = airtime_is_active(air_info, now);
3979 airtime_set_active(air_sched, air_info, now);
3981 if (!RB_EMPTY_NODE(&txqi->schedule_order))
3984 /* If the station has been inactive for a while, catch up its v_t so it
3985 * doesn't get indefinite priority; see comment above the definition of
3986 * AIRTIME_MAX_BEHIND.
3988 if ((!was_active && air_info->v_t < air_sched->v_t) ||
3989 air_info->v_t < air_sched->v_t - AIRTIME_MAX_BEHIND)
3990 air_info->v_t = air_sched->v_t;
3992 ieee80211_update_airtime_weight(local, air_sched, now, !was_active);
3993 __ieee80211_insert_txq(&air_sched->active_txqs, txqi);
3996 spin_unlock_bh(&air_sched->lock);
3998 EXPORT_SYMBOL(ieee80211_schedule_txq);
4000 static void __ieee80211_unschedule_txq(struct ieee80211_hw *hw,
4001 struct ieee80211_txq *txq,
4004 struct ieee80211_local *local = hw_to_local(hw);
4005 struct txq_info *txqi = to_txq_info(txq);
4006 struct airtime_sched_info *air_sched;
4007 struct airtime_info *air_info;
4009 air_sched = &local->airtime[txq->ac];
4010 air_info = to_airtime_info(&txqi->txq);
4012 lockdep_assert_held(&air_sched->lock);
4015 list_del_init(&air_info->list);
4016 ieee80211_update_airtime_weight(local, air_sched, 0, true);
4019 if (RB_EMPTY_NODE(&txqi->schedule_order))
4022 if (air_sched->schedule_pos == &txqi->schedule_order)
4023 air_sched->schedule_pos = rb_prev(&txqi->schedule_order);
4026 airtime_set_active(air_sched, air_info,
4027 ktime_get_boottime_ns());
4029 rb_erase_cached(&txqi->schedule_order,
4030 &air_sched->active_txqs);
4031 RB_CLEAR_NODE(&txqi->schedule_order);
4034 void ieee80211_unschedule_txq(struct ieee80211_hw *hw,
4035 struct ieee80211_txq *txq,
4037 __acquires(txq_lock) __releases(txq_lock)
4039 struct ieee80211_local *local = hw_to_local(hw);
4041 spin_lock_bh(&local->airtime[txq->ac].lock);
4042 __ieee80211_unschedule_txq(hw, txq, purge);
4043 spin_unlock_bh(&local->airtime[txq->ac].lock);
4046 void ieee80211_return_txq(struct ieee80211_hw *hw,
4047 struct ieee80211_txq *txq, bool force)
4049 struct ieee80211_local *local = hw_to_local(hw);
4050 struct txq_info *txqi = to_txq_info(txq);
4052 spin_lock_bh(&local->airtime[txq->ac].lock);
4054 if (!RB_EMPTY_NODE(&txqi->schedule_order) && !force &&
4055 !txq_has_queue(txq))
4056 __ieee80211_unschedule_txq(hw, txq, false);
4058 spin_unlock_bh(&local->airtime[txq->ac].lock);
4060 EXPORT_SYMBOL(ieee80211_return_txq);
4062 DEFINE_STATIC_KEY_FALSE(aql_disable);
4064 bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
4065 struct ieee80211_txq *txq)
4067 struct airtime_info *air_info = to_airtime_info(txq);
4068 struct ieee80211_local *local = hw_to_local(hw);
4070 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
4073 if (static_branch_unlikely(&aql_disable))
4079 if (unlikely(txq->tid == IEEE80211_NUM_TIDS))
4082 if (atomic_read(&air_info->aql_tx_pending) < air_info->aql_limit_low)
4085 if (atomic_read(&local->aql_total_pending_airtime) <
4086 local->aql_threshold &&
4087 atomic_read(&air_info->aql_tx_pending) < air_info->aql_limit_high)
4092 EXPORT_SYMBOL(ieee80211_txq_airtime_check);
4094 bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
4095 struct ieee80211_txq *txq)
4097 struct txq_info *first_txqi = NULL, *txqi = to_txq_info(txq);
4098 struct ieee80211_local *local = hw_to_local(hw);
4099 struct airtime_sched_info *air_sched;
4100 struct airtime_info *air_info;
4101 struct rb_node *node = NULL;
4106 if (!ieee80211_txq_airtime_check(hw, txq))
4109 air_sched = &local->airtime[txq->ac];
4110 spin_lock_bh(&air_sched->lock);
4112 if (RB_EMPTY_NODE(&txqi->schedule_order))
4115 now = ktime_get_boottime_ns();
4117 /* Like in ieee80211_next_txq(), make sure the first station in the
4118 * scheduling order is eligible for transmission to avoid starvation.
4120 node = rb_first_cached(&air_sched->active_txqs);
4122 first_txqi = container_of(node, struct txq_info,
4124 air_info = to_airtime_info(&first_txqi->txq);
4126 if (air_sched->v_t < air_info->v_t)
4127 airtime_catchup_v_t(air_sched, air_info->v_t, now);
4130 air_info = to_airtime_info(&txqi->txq);
4131 if (air_info->v_t <= air_sched->v_t) {
4132 air_sched->last_schedule_activity = now;
4137 spin_unlock_bh(&air_sched->lock);
4140 EXPORT_SYMBOL(ieee80211_txq_may_transmit);
4142 void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
4144 struct ieee80211_local *local = hw_to_local(hw);
4145 struct airtime_sched_info *air_sched = &local->airtime[ac];
4147 spin_lock_bh(&air_sched->lock);
4148 air_sched->schedule_pos = NULL;
4149 spin_unlock_bh(&air_sched->lock);
4151 EXPORT_SYMBOL(ieee80211_txq_schedule_start);
4153 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
4154 struct net_device *dev,
4159 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4160 struct ieee80211_local *local = sdata->local;
4161 struct sta_info *sta;
4162 struct sk_buff *next;
4164 if (unlikely(skb->len < ETH_HLEN)) {
4171 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
4177 if (local->ops->wake_tx_queue) {
4178 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4179 skb_set_queue_mapping(skb, queue);
4183 ieee80211_aggr_check(sdata, sta, skb);
4186 struct ieee80211_fast_tx *fast_tx;
4188 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
4190 fast_tx = rcu_dereference(sta->fast_tx);
4193 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
4197 if (skb_is_gso(skb)) {
4198 struct sk_buff *segs;
4200 segs = skb_gso_segment(skb, 0);
4208 /* we cannot process non-linear frames on this path */
4209 if (skb_linearize(skb)) {
4214 /* the frame could be fragmented, software-encrypted, and other
4215 * things so we cannot really handle checksum offload with it -
4216 * fix it up in software before we handle anything else.
4218 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4219 skb_set_transport_header(skb,
4220 skb_checksum_start_offset(skb));
4221 if (skb_checksum_help(skb))
4226 skb_list_walk_safe(skb, skb, next) {
4227 skb_mark_not_on_list(skb);
4229 if (skb->protocol == sdata->control_port_protocol)
4230 ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
4232 skb = ieee80211_build_hdr(sdata, skb, info_flags,
4233 sta, ctrl_flags, cookie);
4235 kfree_skb_list(next);
4239 dev_sw_netstats_tx_add(dev, 1, skb->len);
4241 ieee80211_xmit(sdata, sta, skb);
4250 static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
4255 err = skb_ensure_writable(skb, ETH_HLEN);
4259 eth = (void *)skb->data;
4260 ether_addr_copy(eth->h_dest, sta->sta.addr);
4265 static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
4266 struct net_device *dev)
4268 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4269 const struct ethhdr *eth = (void *)skb->data;
4270 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
4273 if (likely(!is_multicast_ether_addr(eth->h_dest)))
4276 switch (sdata->vif.type) {
4277 case NL80211_IFTYPE_AP_VLAN:
4278 if (sdata->u.vlan.sta)
4280 if (sdata->wdev.use_4addr)
4283 case NL80211_IFTYPE_AP:
4284 /* check runtime toggle for this bss */
4285 if (!sdata->bss->multicast_to_unicast)
4292 /* multicast to unicast conversion only for some payload */
4293 ethertype = eth->h_proto;
4294 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4295 ethertype = ethvlan->h_vlan_encapsulated_proto;
4296 switch (ethertype) {
4297 case htons(ETH_P_ARP):
4298 case htons(ETH_P_IP):
4299 case htons(ETH_P_IPV6):
4309 ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4310 struct sk_buff_head *queue)
4312 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4313 struct ieee80211_local *local = sdata->local;
4314 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4315 struct sta_info *sta, *first = NULL;
4316 struct sk_buff *cloned_skb;
4320 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4321 if (sdata != sta->sdata)
4322 /* AP-VLAN mismatch */
4324 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4325 /* do not send back to source */
4331 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4334 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4335 dev_kfree_skb(cloned_skb);
4338 __skb_queue_tail(queue, cloned_skb);
4341 if (likely(first)) {
4342 if (unlikely(ieee80211_change_da(skb, first)))
4344 __skb_queue_tail(queue, skb);
4346 /* no STA connected, drop */
4353 __skb_queue_purge(queue);
4354 __skb_queue_tail(queue, skb);
4360 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4361 * @skb: packet to be sent
4362 * @dev: incoming interface
4364 * On failure skb will be freed.
4366 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4367 struct net_device *dev)
4369 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4370 struct sk_buff_head queue;
4372 __skb_queue_head_init(&queue);
4373 ieee80211_convert_to_unicast(skb, dev, &queue);
4374 while ((skb = __skb_dequeue(&queue)))
4375 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4377 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4380 return NETDEV_TX_OK;
4383 static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4384 struct sk_buff *skb, int led_len,
4385 struct sta_info *sta,
4388 struct ieee80211_local *local = sdata->local;
4389 struct ieee80211_tx_control control = {};
4390 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4391 struct ieee80211_sta *pubsta = NULL;
4392 unsigned long flags;
4393 int q = info->hw_queue;
4396 sk_pacing_shift_update(skb->sk, local->hw.tx_sk_pacing_shift);
4398 if (ieee80211_queue_skb(local, sdata, sta, skb))
4401 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4403 if (local->queue_stop_reasons[q] ||
4404 (!txpending && !skb_queue_empty(&local->pending[q]))) {
4406 skb_queue_head(&local->pending[q], skb);
4408 skb_queue_tail(&local->pending[q], skb);
4410 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4417 if (sta && sta->uploaded)
4420 control.sta = pubsta;
4422 drv_tx(local, &control, skb);
4427 static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
4428 struct net_device *dev, struct sta_info *sta,
4429 struct ieee80211_key *key, struct sk_buff *skb)
4431 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4432 struct ieee80211_local *local = sdata->local;
4433 struct tid_ampdu_tx *tid_tx;
4436 if (local->ops->wake_tx_queue) {
4437 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4438 skb_set_queue_mapping(skb, queue);
4442 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) &&
4443 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
4446 memset(info, 0, sizeof(*info));
4448 ieee80211_aggr_check(sdata, sta, skb);
4450 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
4451 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
4453 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
4454 /* fall back to non-offload slow path */
4455 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4459 info->flags |= IEEE80211_TX_CTL_AMPDU;
4460 if (tid_tx->timeout)
4461 tid_tx->last_tx = jiffies;
4464 if (unlikely(skb->sk &&
4465 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS))
4466 info->ack_frame_id = ieee80211_store_ack_skb(local, skb,
4467 &info->flags, NULL);
4469 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
4471 dev_sw_netstats_tx_add(dev, 1, skb->len);
4473 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
4474 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
4476 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4477 sdata = container_of(sdata->bss,
4478 struct ieee80211_sub_if_data, u.ap);
4480 info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP;
4481 info->control.vif = &sdata->vif;
4484 info->control.hw_key = &key->conf;
4486 ieee80211_tx_8023(sdata, skb, skb->len, sta, false);
4494 netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
4495 struct net_device *dev)
4497 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4498 struct ethhdr *ehdr = (struct ethhdr *)skb->data;
4499 struct ieee80211_key *key;
4500 struct sta_info *sta;
4502 if (unlikely(skb->len < ETH_HLEN)) {
4504 return NETDEV_TX_OK;
4509 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4514 if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded ||
4515 !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
4516 sdata->control_port_protocol == ehdr->h_proto))
4519 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4521 key = rcu_dereference(sdata->default_unicast_key);
4523 if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) ||
4524 key->conf.cipher == WLAN_CIPHER_SUITE_TKIP))
4527 ieee80211_8023_xmit(sdata, dev, sta, key, skb);
4531 ieee80211_subif_start_xmit(skb, dev);
4535 return NETDEV_TX_OK;
4539 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4540 struct sk_buff *skb, u32 info_flags)
4542 struct ieee80211_hdr *hdr;
4543 struct ieee80211_tx_data tx = {
4544 .local = sdata->local,
4547 struct sta_info *sta;
4551 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4553 skb = ERR_PTR(-EINVAL);
4557 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0, NULL);
4561 hdr = (void *)skb->data;
4562 tx.sta = sta_info_get(sdata, hdr->addr1);
4565 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4568 return ERR_PTR(-EINVAL);
4577 * ieee80211_clear_tx_pending may not be called in a context where
4578 * it is possible that it packets could come in again.
4580 void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4582 struct sk_buff *skb;
4585 for (i = 0; i < local->hw.queues; i++) {
4586 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4587 ieee80211_free_txskb(&local->hw, skb);
4592 * Returns false if the frame couldn't be transmitted but was queued instead,
4593 * which in this case means re-queued -- take as an indication to stop sending
4594 * more pending frames.
4596 static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4597 struct sk_buff *skb)
4599 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4600 struct ieee80211_sub_if_data *sdata;
4601 struct sta_info *sta;
4602 struct ieee80211_hdr *hdr;
4604 struct ieee80211_chanctx_conf *chanctx_conf;
4606 sdata = vif_to_sdata(info->control.vif);
4608 if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) {
4609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4610 if (unlikely(!chanctx_conf)) {
4614 info->band = chanctx_conf->def.chan->band;
4615 result = ieee80211_tx(sdata, NULL, skb, true);
4616 } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
4617 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4622 if (IS_ERR(sta) || (sta && !sta->uploaded))
4625 result = ieee80211_tx_8023(sdata, skb, skb->len, sta, true);
4627 struct sk_buff_head skbs;
4629 __skb_queue_head_init(&skbs);
4630 __skb_queue_tail(&skbs, skb);
4632 hdr = (struct ieee80211_hdr *)skb->data;
4633 sta = sta_info_get(sdata, hdr->addr1);
4635 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
4642 * Transmit all pending packets. Called from tasklet.
4644 void ieee80211_tx_pending(struct tasklet_struct *t)
4646 struct ieee80211_local *local = from_tasklet(local, t,
4647 tx_pending_tasklet);
4648 unsigned long flags;
4654 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4655 for (i = 0; i < local->hw.queues; i++) {
4657 * If queue is stopped by something other than due to pending
4658 * frames, or we have no pending frames, proceed to next queue.
4660 if (local->queue_stop_reasons[i] ||
4661 skb_queue_empty(&local->pending[i]))
4664 while (!skb_queue_empty(&local->pending[i])) {
4665 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
4666 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4668 if (WARN_ON(!info->control.vif)) {
4669 ieee80211_free_txskb(&local->hw, skb);
4673 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4676 txok = ieee80211_tx_pending_skb(local, skb);
4677 spin_lock_irqsave(&local->queue_stop_reason_lock,
4683 if (skb_queue_empty(&local->pending[i]))
4684 ieee80211_propagate_queue_wake(local, i);
4686 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4691 /* functions for drivers to get certain frames */
4693 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4694 struct ps_data *ps, struct sk_buff *skb,
4699 int i, have_bits = 0, n1, n2;
4701 /* Generate bitmap for TIM only if there are any STAs in power save
4703 if (atomic_read(&ps->num_sta_ps) > 0)
4704 /* in the hope that this is faster than
4705 * checking byte-for-byte */
4706 have_bits = !bitmap_empty((unsigned long *)ps->tim,
4707 IEEE80211_MAX_AID+1);
4709 if (ps->dtim_count == 0)
4710 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
4715 tim = pos = skb_put(skb, 6);
4716 *pos++ = WLAN_EID_TIM;
4718 *pos++ = ps->dtim_count;
4719 *pos++ = sdata->vif.bss_conf.dtim_period;
4721 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
4724 ps->dtim_bc_mc = aid0 == 1;
4727 /* Find largest even number N1 so that bits numbered 1 through
4728 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4729 * (N2 + 1) x 8 through 2007 are 0. */
4731 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4738 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4745 /* Bitmap control */
4747 /* Part Virt Bitmap */
4748 skb_put(skb, n2 - n1);
4749 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
4751 tim[1] = n2 - n1 + 4;
4753 *pos++ = aid0; /* Bitmap control */
4754 *pos++ = 0; /* Part Virt Bitmap */
4758 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4759 struct ps_data *ps, struct sk_buff *skb,
4762 struct ieee80211_local *local = sdata->local;
4765 * Not very nice, but we want to allow the driver to call
4766 * ieee80211_beacon_get() as a response to the set_tim()
4767 * callback. That, however, is already invoked under the
4768 * sta_lock to guarantee consistent and race-free update
4769 * of the tim bitmap in mac80211 and the driver.
4771 if (local->tim_in_locked_section) {
4772 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4774 spin_lock_bh(&local->tim_lock);
4775 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4776 spin_unlock_bh(&local->tim_lock);
4782 static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
4783 struct beacon_data *beacon)
4785 struct probe_resp *resp;
4787 size_t beacon_data_len;
4789 u8 count = beacon->cntdwn_current_counter;
4791 switch (sdata->vif.type) {
4792 case NL80211_IFTYPE_AP:
4793 beacon_data = beacon->tail;
4794 beacon_data_len = beacon->tail_len;
4796 case NL80211_IFTYPE_ADHOC:
4797 beacon_data = beacon->head;
4798 beacon_data_len = beacon->head_len;
4800 case NL80211_IFTYPE_MESH_POINT:
4801 beacon_data = beacon->head;
4802 beacon_data_len = beacon->head_len;
4809 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; ++i) {
4810 resp = rcu_dereference(sdata->u.ap.probe_resp);
4812 if (beacon->cntdwn_counter_offsets[i]) {
4813 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[i] >=
4819 beacon_data[beacon->cntdwn_counter_offsets[i]] = count;
4822 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4823 resp->data[resp->cntdwn_counter_offsets[i]] = count;
4828 static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon)
4830 beacon->cntdwn_current_counter--;
4832 /* the counter should never reach 0 */
4833 WARN_ON_ONCE(!beacon->cntdwn_current_counter);
4835 return beacon->cntdwn_current_counter;
4838 u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif)
4840 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4841 struct beacon_data *beacon = NULL;
4846 if (sdata->vif.type == NL80211_IFTYPE_AP)
4847 beacon = rcu_dereference(sdata->u.ap.beacon);
4848 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4849 beacon = rcu_dereference(sdata->u.ibss.presp);
4850 else if (ieee80211_vif_is_mesh(&sdata->vif))
4851 beacon = rcu_dereference(sdata->u.mesh.beacon);
4856 count = __ieee80211_beacon_update_cntdwn(beacon);
4862 EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
4864 void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
4866 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4867 struct beacon_data *beacon = NULL;
4871 if (sdata->vif.type == NL80211_IFTYPE_AP)
4872 beacon = rcu_dereference(sdata->u.ap.beacon);
4873 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4874 beacon = rcu_dereference(sdata->u.ibss.presp);
4875 else if (ieee80211_vif_is_mesh(&sdata->vif))
4876 beacon = rcu_dereference(sdata->u.mesh.beacon);
4881 if (counter < beacon->cntdwn_current_counter)
4882 beacon->cntdwn_current_counter = counter;
4887 EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
4889 bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif)
4891 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4892 struct beacon_data *beacon = NULL;
4894 size_t beacon_data_len;
4897 if (!ieee80211_sdata_running(sdata))
4901 if (vif->type == NL80211_IFTYPE_AP) {
4902 struct ieee80211_if_ap *ap = &sdata->u.ap;
4904 beacon = rcu_dereference(ap->beacon);
4905 if (WARN_ON(!beacon || !beacon->tail))
4907 beacon_data = beacon->tail;
4908 beacon_data_len = beacon->tail_len;
4909 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4910 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4912 beacon = rcu_dereference(ifibss->presp);
4916 beacon_data = beacon->head;
4917 beacon_data_len = beacon->head_len;
4918 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4919 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4921 beacon = rcu_dereference(ifmsh->beacon);
4925 beacon_data = beacon->head;
4926 beacon_data_len = beacon->head_len;
4932 if (!beacon->cntdwn_counter_offsets[0])
4935 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
4938 if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
4946 EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
4948 static int ieee80211_beacon_protect(struct sk_buff *skb,
4949 struct ieee80211_local *local,
4950 struct ieee80211_sub_if_data *sdata)
4952 ieee80211_tx_result res;
4953 struct ieee80211_tx_data tx;
4954 struct sk_buff *check_skb;
4956 memset(&tx, 0, sizeof(tx));
4957 tx.key = rcu_dereference(sdata->default_beacon_key);
4962 __skb_queue_head_init(&tx.skbs);
4963 __skb_queue_tail(&tx.skbs, skb);
4964 res = ieee80211_tx_h_encrypt(&tx);
4965 check_skb = __skb_dequeue(&tx.skbs);
4966 /* we may crash after this, but it'd be a bug in crypto */
4967 WARN_ON(check_skb != skb);
4968 if (WARN_ON_ONCE(res != TX_CONTINUE))
4974 static struct sk_buff *
4975 __ieee80211_beacon_get(struct ieee80211_hw *hw,
4976 struct ieee80211_vif *vif,
4977 struct ieee80211_mutable_offsets *offs,
4980 struct ieee80211_local *local = hw_to_local(hw);
4981 struct beacon_data *beacon = NULL;
4982 struct sk_buff *skb = NULL;
4983 struct ieee80211_tx_info *info;
4984 struct ieee80211_sub_if_data *sdata = NULL;
4985 enum nl80211_band band;
4986 struct ieee80211_tx_rate_control txrc;
4987 struct ieee80211_chanctx_conf *chanctx_conf;
4988 int csa_off_base = 0;
4992 sdata = vif_to_sdata(vif);
4993 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4995 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
4999 memset(offs, 0, sizeof(*offs));
5001 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5002 struct ieee80211_if_ap *ap = &sdata->u.ap;
5004 beacon = rcu_dereference(ap->beacon);
5006 if (beacon->cntdwn_counter_offsets[0]) {
5008 ieee80211_beacon_update_cntdwn(vif);
5010 ieee80211_set_beacon_cntdwn(sdata, beacon);
5014 * headroom, head length,
5015 * tail length and maximum TIM length
5017 skb = dev_alloc_skb(local->tx_headroom +
5019 beacon->tail_len + 256 +
5020 local->hw.extra_beacon_tailroom);
5024 skb_reserve(skb, local->tx_headroom);
5025 skb_put_data(skb, beacon->head, beacon->head_len);
5027 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
5031 offs->tim_offset = beacon->head_len;
5032 offs->tim_length = skb->len - beacon->head_len;
5034 /* for AP the csa offsets are from tail */
5035 csa_off_base = skb->len;
5039 skb_put_data(skb, beacon->tail,
5042 if (ieee80211_beacon_protect(skb, local, sdata) < 0)
5046 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
5047 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
5048 struct ieee80211_hdr *hdr;
5050 beacon = rcu_dereference(ifibss->presp);
5054 if (beacon->cntdwn_counter_offsets[0]) {
5056 __ieee80211_beacon_update_cntdwn(beacon);
5058 ieee80211_set_beacon_cntdwn(sdata, beacon);
5061 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
5062 local->hw.extra_beacon_tailroom);
5065 skb_reserve(skb, local->tx_headroom);
5066 skb_put_data(skb, beacon->head, beacon->head_len);
5068 hdr = (struct ieee80211_hdr *) skb->data;
5069 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5070 IEEE80211_STYPE_BEACON);
5071 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5072 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5074 beacon = rcu_dereference(ifmsh->beacon);
5078 if (beacon->cntdwn_counter_offsets[0]) {
5080 /* TODO: For mesh csa_counter is in TU, so
5081 * decrementing it by one isn't correct, but
5082 * for now we leave it consistent with overall
5083 * mac80211's behavior.
5085 __ieee80211_beacon_update_cntdwn(beacon);
5087 ieee80211_set_beacon_cntdwn(sdata, beacon);
5090 if (ifmsh->sync_ops)
5091 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
5093 skb = dev_alloc_skb(local->tx_headroom +
5097 local->hw.extra_beacon_tailroom);
5100 skb_reserve(skb, local->tx_headroom);
5101 skb_put_data(skb, beacon->head, beacon->head_len);
5102 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
5105 offs->tim_offset = beacon->head_len;
5106 offs->tim_length = skb->len - beacon->head_len;
5109 skb_put_data(skb, beacon->tail, beacon->tail_len);
5116 if (offs && beacon) {
5119 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
5120 u16 csa_off = beacon->cntdwn_counter_offsets[i];
5125 offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
5129 band = chanctx_conf->def.chan->band;
5131 info = IEEE80211_SKB_CB(skb);
5133 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5134 info->flags |= IEEE80211_TX_CTL_NO_ACK;
5137 memset(&txrc, 0, sizeof(txrc));
5139 txrc.sband = local->hw.wiphy->bands[band];
5140 txrc.bss_conf = &sdata->vif.bss_conf;
5142 txrc.reported_rate.idx = -1;
5143 if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band])
5144 txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band];
5146 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
5148 rate_control_get_rate(sdata, NULL, &txrc);
5150 info->control.vif = vif;
5152 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
5153 IEEE80211_TX_CTL_ASSIGN_SEQ |
5154 IEEE80211_TX_CTL_FIRST_FRAGMENT;
5162 ieee80211_beacon_get_template(struct ieee80211_hw *hw,
5163 struct ieee80211_vif *vif,
5164 struct ieee80211_mutable_offsets *offs)
5166 return __ieee80211_beacon_get(hw, vif, offs, true);
5168 EXPORT_SYMBOL(ieee80211_beacon_get_template);
5170 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
5171 struct ieee80211_vif *vif,
5172 u16 *tim_offset, u16 *tim_length)
5174 struct ieee80211_mutable_offsets offs = {};
5175 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
5176 struct sk_buff *copy;
5177 struct ieee80211_supported_band *sband;
5184 *tim_offset = offs.tim_offset;
5187 *tim_length = offs.tim_length;
5189 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
5190 !hw_to_local(hw)->monitors)
5193 /* send a copy to monitor interfaces */
5194 copy = skb_copy(bcn, GFP_ATOMIC);
5198 shift = ieee80211_vif_get_shift(vif);
5199 sband = ieee80211_get_sband(vif_to_sdata(vif));
5203 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false,
5208 EXPORT_SYMBOL(ieee80211_beacon_get_tim);
5210 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
5211 struct ieee80211_vif *vif)
5213 struct ieee80211_if_ap *ap = NULL;
5214 struct sk_buff *skb = NULL;
5215 struct probe_resp *presp = NULL;
5216 struct ieee80211_hdr *hdr;
5217 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5219 if (sdata->vif.type != NL80211_IFTYPE_AP)
5225 presp = rcu_dereference(ap->probe_resp);
5229 skb = dev_alloc_skb(presp->len);
5233 skb_put_data(skb, presp->data, presp->len);
5235 hdr = (struct ieee80211_hdr *) skb->data;
5236 memset(hdr->addr1, 0, sizeof(hdr->addr1));
5242 EXPORT_SYMBOL(ieee80211_proberesp_get);
5244 struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
5245 struct ieee80211_vif *vif)
5247 struct sk_buff *skb = NULL;
5248 struct fils_discovery_data *tmpl = NULL;
5249 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5251 if (sdata->vif.type != NL80211_IFTYPE_AP)
5255 tmpl = rcu_dereference(sdata->u.ap.fils_discovery);
5261 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5263 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5264 skb_put_data(skb, tmpl->data, tmpl->len);
5270 EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
5273 ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
5274 struct ieee80211_vif *vif)
5276 struct sk_buff *skb = NULL;
5277 struct unsol_bcast_probe_resp_data *tmpl = NULL;
5278 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5280 if (sdata->vif.type != NL80211_IFTYPE_AP)
5284 tmpl = rcu_dereference(sdata->u.ap.unsol_bcast_probe_resp);
5290 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5292 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5293 skb_put_data(skb, tmpl->data, tmpl->len);
5299 EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl);
5301 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
5302 struct ieee80211_vif *vif)
5304 struct ieee80211_sub_if_data *sdata;
5305 struct ieee80211_if_managed *ifmgd;
5306 struct ieee80211_pspoll *pspoll;
5307 struct ieee80211_local *local;
5308 struct sk_buff *skb;
5310 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5313 sdata = vif_to_sdata(vif);
5314 ifmgd = &sdata->u.mgd;
5315 local = sdata->local;
5317 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
5321 skb_reserve(skb, local->hw.extra_tx_headroom);
5323 pspoll = skb_put_zero(skb, sizeof(*pspoll));
5324 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
5325 IEEE80211_STYPE_PSPOLL);
5326 pspoll->aid = cpu_to_le16(sdata->vif.bss_conf.aid);
5328 /* aid in PS-Poll has its two MSBs each set to 1 */
5329 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
5331 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
5332 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
5336 EXPORT_SYMBOL(ieee80211_pspoll_get);
5338 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
5339 struct ieee80211_vif *vif,
5342 struct ieee80211_hdr_3addr *nullfunc;
5343 struct ieee80211_sub_if_data *sdata;
5344 struct ieee80211_if_managed *ifmgd;
5345 struct ieee80211_local *local;
5346 struct sk_buff *skb;
5349 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5352 sdata = vif_to_sdata(vif);
5353 ifmgd = &sdata->u.mgd;
5354 local = sdata->local;
5357 struct sta_info *sta;
5360 sta = sta_info_get(sdata, ifmgd->bssid);
5361 qos = sta && sta->sta.wme;
5365 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5366 sizeof(*nullfunc) + 2);
5370 skb_reserve(skb, local->hw.extra_tx_headroom);
5372 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
5373 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
5374 IEEE80211_STYPE_NULLFUNC |
5375 IEEE80211_FCTL_TODS);
5377 __le16 qoshdr = cpu_to_le16(7);
5379 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
5380 IEEE80211_STYPE_NULLFUNC) !=
5381 IEEE80211_STYPE_QOS_NULLFUNC);
5382 nullfunc->frame_control |=
5383 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
5385 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
5386 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
5389 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
5390 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
5391 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
5395 EXPORT_SYMBOL(ieee80211_nullfunc_get);
5397 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
5399 const u8 *ssid, size_t ssid_len,
5402 struct ieee80211_local *local = hw_to_local(hw);
5403 struct ieee80211_hdr_3addr *hdr;
5404 struct sk_buff *skb;
5408 ie_ssid_len = 2 + ssid_len;
5410 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
5411 ie_ssid_len + tailroom);
5415 skb_reserve(skb, local->hw.extra_tx_headroom);
5417 hdr = skb_put_zero(skb, sizeof(*hdr));
5418 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5419 IEEE80211_STYPE_PROBE_REQ);
5420 eth_broadcast_addr(hdr->addr1);
5421 memcpy(hdr->addr2, src_addr, ETH_ALEN);
5422 eth_broadcast_addr(hdr->addr3);
5424 pos = skb_put(skb, ie_ssid_len);
5425 *pos++ = WLAN_EID_SSID;
5428 memcpy(pos, ssid, ssid_len);
5433 EXPORT_SYMBOL(ieee80211_probereq_get);
5435 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5436 const void *frame, size_t frame_len,
5437 const struct ieee80211_tx_info *frame_txctl,
5438 struct ieee80211_rts *rts)
5440 const struct ieee80211_hdr *hdr = frame;
5442 rts->frame_control =
5443 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
5444 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
5446 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
5447 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
5449 EXPORT_SYMBOL(ieee80211_rts_get);
5451 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5452 const void *frame, size_t frame_len,
5453 const struct ieee80211_tx_info *frame_txctl,
5454 struct ieee80211_cts *cts)
5456 const struct ieee80211_hdr *hdr = frame;
5458 cts->frame_control =
5459 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
5460 cts->duration = ieee80211_ctstoself_duration(hw, vif,
5461 frame_len, frame_txctl);
5462 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
5464 EXPORT_SYMBOL(ieee80211_ctstoself_get);
5467 ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
5468 struct ieee80211_vif *vif)
5470 struct ieee80211_local *local = hw_to_local(hw);
5471 struct sk_buff *skb = NULL;
5472 struct ieee80211_tx_data tx;
5473 struct ieee80211_sub_if_data *sdata;
5475 struct ieee80211_tx_info *info;
5476 struct ieee80211_chanctx_conf *chanctx_conf;
5478 sdata = vif_to_sdata(vif);
5481 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5486 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5487 struct beacon_data *beacon =
5488 rcu_dereference(sdata->u.ap.beacon);
5490 if (!beacon || !beacon->head)
5493 ps = &sdata->u.ap.ps;
5494 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5495 ps = &sdata->u.mesh.ps;
5500 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
5501 goto out; /* send buffered bc/mc only after DTIM beacon */
5504 skb = skb_dequeue(&ps->bc_buf);
5507 local->total_ps_buffered--;
5509 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
5510 struct ieee80211_hdr *hdr =
5511 (struct ieee80211_hdr *) skb->data;
5512 /* more buffered multicast/broadcast frames ==> set
5513 * MoreData flag in IEEE 802.11 header to inform PS
5515 hdr->frame_control |=
5516 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5519 if (sdata->vif.type == NL80211_IFTYPE_AP)
5520 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
5521 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
5523 ieee80211_free_txskb(hw, skb);
5526 info = IEEE80211_SKB_CB(skb);
5528 tx.flags |= IEEE80211_TX_PS_BUFFERED;
5529 info->band = chanctx_conf->def.chan->band;
5531 if (invoke_tx_handlers(&tx))
5538 EXPORT_SYMBOL(ieee80211_get_buffered_bc);
5540 int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5542 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5543 struct ieee80211_sub_if_data *sdata = sta->sdata;
5544 struct ieee80211_local *local = sdata->local;
5548 lockdep_assert_held(&local->sta_mtx);
5550 /* only some cases are supported right now */
5551 switch (sdata->vif.type) {
5552 case NL80211_IFTYPE_STATION:
5553 case NL80211_IFTYPE_AP:
5554 case NL80211_IFTYPE_AP_VLAN:
5561 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5564 if (sta->reserved_tid == tid) {
5569 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5570 sdata_err(sdata, "TID reservation already active\n");
5575 ieee80211_stop_vif_queues(sdata->local, sdata,
5576 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5580 /* Tear down BA sessions so we stop aggregating on this TID */
5581 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
5582 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
5583 __ieee80211_stop_tx_ba_session(sta, tid,
5584 AGG_STOP_LOCAL_REQUEST);
5587 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
5588 __ieee80211_flush_queues(local, sdata, queues, false);
5590 sta->reserved_tid = tid;
5592 ieee80211_wake_vif_queues(local, sdata,
5593 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5595 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
5596 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
5602 EXPORT_SYMBOL(ieee80211_reserve_tid);
5604 void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5606 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5607 struct ieee80211_sub_if_data *sdata = sta->sdata;
5609 lockdep_assert_held(&sdata->local->sta_mtx);
5611 /* only some cases are supported right now */
5612 switch (sdata->vif.type) {
5613 case NL80211_IFTYPE_STATION:
5614 case NL80211_IFTYPE_AP:
5615 case NL80211_IFTYPE_AP_VLAN:
5622 if (tid != sta->reserved_tid) {
5623 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
5627 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
5629 EXPORT_SYMBOL(ieee80211_unreserve_tid);
5631 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
5632 struct sk_buff *skb, int tid,
5633 enum nl80211_band band)
5635 int ac = ieee80211_ac_from_tid(tid);
5637 skb_reset_mac_header(skb);
5638 skb_set_queue_mapping(skb, ac);
5639 skb->priority = tid;
5641 skb->dev = sdata->dev;
5644 * The other path calling ieee80211_xmit is from the tasklet,
5645 * and while we can handle concurrent transmissions locking
5646 * requirements are that we do not come into tx with bhs on.
5649 IEEE80211_SKB_CB(skb)->band = band;
5650 ieee80211_xmit(sdata, NULL, skb);
5654 int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
5655 const u8 *buf, size_t len,
5656 const u8 *dest, __be16 proto, bool unencrypted,
5659 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5660 struct ieee80211_local *local = sdata->local;
5661 struct sta_info *sta;
5662 struct sk_buff *skb;
5663 struct ethhdr *ehdr;
5667 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
5668 * or Pre-Authentication
5670 if (proto != sdata->control_port_protocol &&
5671 proto != cpu_to_be16(ETH_P_PREAUTH))
5674 if (proto == sdata->control_port_protocol)
5675 ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
5676 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
5679 flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5682 ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
5684 flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX;
5686 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5687 sizeof(struct ethhdr) + len);
5691 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
5693 skb_put_data(skb, buf, len);
5695 ehdr = skb_push(skb, sizeof(struct ethhdr));
5696 memcpy(ehdr->h_dest, dest, ETH_ALEN);
5697 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
5698 ehdr->h_proto = proto;
5701 skb->protocol = proto;
5702 skb_reset_network_header(skb);
5703 skb_reset_mac_header(skb);
5705 /* update QoS header to prioritize control port frames if possible,
5706 * priorization also happens for control port frames send over
5711 if (ieee80211_lookup_ra_sta(sdata, skb, &sta) == 0 && !IS_ERR(sta)) {
5712 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
5714 skb_set_queue_mapping(skb, queue);
5720 /* mutex lock is only needed for incrementing the cookie counter */
5721 mutex_lock(&local->mtx);
5724 __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags, cookie);
5727 mutex_unlock(&local->mtx);
5732 int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
5733 const u8 *buf, size_t len)
5735 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5736 struct ieee80211_local *local = sdata->local;
5737 struct sk_buff *skb;
5739 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
5740 30 + /* header size */
5741 18); /* 11s header size */
5745 skb_reserve(skb, local->hw.extra_tx_headroom);
5746 skb_put_data(skb, buf, len);
5749 skb->protocol = htons(ETH_P_802_3);
5750 skb_reset_network_header(skb);
5751 skb_reset_mac_header(skb);
5754 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
5755 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP,