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) 2018-2020 Intel Corporation
10 * Transmit and frame generation functions.
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/skbuff.h>
16 #include <linux/if_vlan.h>
17 #include <linux/etherdevice.h>
18 #include <linux/bitmap.h>
19 #include <linux/rcupdate.h>
20 #include <linux/export.h>
21 #include <net/net_namespace.h>
22 #include <net/ieee80211_radiotap.h>
23 #include <net/cfg80211.h>
24 #include <net/mac80211.h>
25 #include <net/codel.h>
26 #include <net/codel_impl.h>
27 #include <asm/unaligned.h>
28 #include <net/fq_impl.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
41 static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
43 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
45 u64_stats_update_begin(&tstats->syncp);
47 tstats->tx_bytes += len;
48 u64_stats_update_end(&tstats->syncp);
51 static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
52 struct sk_buff *skb, int group_addr,
55 int rate, mrate, erp, dur, i, shift = 0;
56 struct ieee80211_rate *txrate;
57 struct ieee80211_local *local = tx->local;
58 struct ieee80211_supported_band *sband;
59 struct ieee80211_hdr *hdr;
60 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
61 struct ieee80211_chanctx_conf *chanctx_conf;
64 /* assume HW handles this */
65 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
69 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
71 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
72 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
77 if (WARN_ON_ONCE(tx->rate.idx < 0))
80 sband = local->hw.wiphy->bands[info->band];
81 txrate = &sband->bitrates[tx->rate.idx];
83 erp = txrate->flags & IEEE80211_RATE_ERP_G;
85 /* device is expected to do this */
86 if (sband->band == NL80211_BAND_S1GHZ)
90 * data and mgmt (except PS Poll):
92 * - during contention period:
93 * if addr1 is group address: 0
94 * if more fragments = 0 and addr1 is individual address: time to
95 * transmit one ACK plus SIFS
96 * if more fragments = 1 and addr1 is individual address: time to
97 * transmit next fragment plus 2 x ACK plus 3 x SIFS
100 * - control response frame (CTS or ACK) shall be transmitted using the
101 * same rate as the immediately previous frame in the frame exchange
102 * sequence, if this rate belongs to the PHY mandatory rates, or else
103 * at the highest possible rate belonging to the PHY rates in the
106 hdr = (struct ieee80211_hdr *)skb->data;
107 if (ieee80211_is_ctl(hdr->frame_control)) {
108 /* TODO: These control frames are not currently sent by
109 * mac80211, but should they be implemented, this function
110 * needs to be updated to support duration field calculation.
112 * RTS: time needed to transmit pending data/mgmt frame plus
113 * one CTS frame plus one ACK frame plus 3 x SIFS
114 * CTS: duration of immediately previous RTS minus time
115 * required to transmit CTS and its SIFS
116 * ACK: 0 if immediately previous directed data/mgmt had
117 * more=0, with more=1 duration in ACK frame is duration
118 * from previous frame minus time needed to transmit ACK
120 * PS Poll: BIT(15) | BIT(14) | aid
126 if (0 /* FIX: data/mgmt during CFP */)
127 return cpu_to_le16(32768);
129 if (group_addr) /* Group address as the destination - no ACK */
132 /* Individual destination address:
133 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
134 * CTS and ACK frames shall be transmitted using the highest rate in
135 * basic rate set that is less than or equal to the rate of the
136 * immediately previous frame and that is using the same modulation
137 * (CCK or OFDM). If no basic rate set matches with these requirements,
138 * the highest mandatory rate of the PHY that is less than or equal to
139 * the rate of the previous frame is used.
140 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
143 /* use lowest available if everything fails */
144 mrate = sband->bitrates[0].bitrate;
145 for (i = 0; i < sband->n_bitrates; i++) {
146 struct ieee80211_rate *r = &sband->bitrates[i];
148 if (r->bitrate > txrate->bitrate)
151 if ((rate_flags & r->flags) != rate_flags)
154 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
155 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
157 switch (sband->band) {
158 case NL80211_BAND_2GHZ: {
160 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
161 flag = IEEE80211_RATE_MANDATORY_G;
163 flag = IEEE80211_RATE_MANDATORY_B;
168 case NL80211_BAND_5GHZ:
169 case NL80211_BAND_6GHZ:
170 if (r->flags & IEEE80211_RATE_MANDATORY_A)
173 case NL80211_BAND_S1GHZ:
174 case NL80211_BAND_60GHZ:
175 /* TODO, for now fall through */
176 case NUM_NL80211_BANDS:
182 /* No matching basic rate found; use highest suitable mandatory
184 rate = DIV_ROUND_UP(mrate, 1 << shift);
187 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
188 if (ieee80211_is_data_qos(hdr->frame_control) &&
189 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
192 /* Time needed to transmit ACK
193 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
194 * to closest integer */
195 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
196 tx->sdata->vif.bss_conf.use_short_preamble,
200 /* Frame is fragmented: duration increases with time needed to
201 * transmit next fragment plus ACK and 2 x SIFS. */
202 dur *= 2; /* ACK + SIFS */
204 dur += ieee80211_frame_duration(sband->band, next_frag_len,
205 txrate->bitrate, erp,
206 tx->sdata->vif.bss_conf.use_short_preamble,
210 return cpu_to_le16(dur);
214 static ieee80211_tx_result debug_noinline
215 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
217 struct ieee80211_local *local = tx->local;
218 struct ieee80211_if_managed *ifmgd;
219 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
221 /* driver doesn't support power save */
222 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
225 /* hardware does dynamic power save */
226 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
229 /* dynamic power save disabled */
230 if (local->hw.conf.dynamic_ps_timeout <= 0)
233 /* we are scanning, don't enable power save */
237 if (!local->ps_sdata)
240 /* No point if we're going to suspend */
241 if (local->quiescing)
244 /* dynamic ps is supported only in managed mode */
245 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
248 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
251 ifmgd = &tx->sdata->u.mgd;
254 * Don't wakeup from power save if u-apsd is enabled, voip ac has
255 * u-apsd enabled and the frame is in voip class. This effectively
256 * means that even if all access categories have u-apsd enabled, in
257 * practise u-apsd is only used with the voip ac. This is a
258 * workaround for the case when received voip class packets do not
259 * have correct qos tag for some reason, due the network or the
262 * Note: ifmgd->uapsd_queues access is racy here. If the value is
263 * changed via debugfs, user needs to reassociate manually to have
264 * everything in sync.
266 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
267 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
268 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
271 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
272 ieee80211_stop_queues_by_reason(&local->hw,
273 IEEE80211_MAX_QUEUE_MAP,
274 IEEE80211_QUEUE_STOP_REASON_PS,
276 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
277 ieee80211_queue_work(&local->hw,
278 &local->dynamic_ps_disable_work);
281 /* Don't restart the timer if we're not disassociated */
282 if (!ifmgd->associated)
285 mod_timer(&local->dynamic_ps_timer, jiffies +
286 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
291 static ieee80211_tx_result debug_noinline
292 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
295 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
296 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
299 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
302 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
303 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
304 !ieee80211_is_probe_req(hdr->frame_control) &&
305 !ieee80211_is_any_nullfunc(hdr->frame_control))
307 * When software scanning only nullfunc frames (to notify
308 * the sleep state to the AP) and probe requests (for the
309 * active scan) are allowed, all other frames should not be
310 * sent and we should not get here, but if we do
311 * nonetheless, drop them to avoid sending them
312 * off-channel. See the link below and
313 * ieee80211_start_scan() for more.
315 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
319 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
322 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
325 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
329 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
331 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
332 if (unlikely(!assoc &&
333 ieee80211_is_data(hdr->frame_control))) {
334 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
335 sdata_info(tx->sdata,
336 "dropped data frame to not associated station %pM\n",
339 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
342 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
343 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
345 * No associated STAs - no need to send multicast
354 /* This function is called whenever the AP is about to exceed the maximum limit
355 * of buffered frames for power saving STAs. This situation should not really
356 * happen often during normal operation, so dropping the oldest buffered packet
357 * from each queue should be OK to make some room for new frames. */
358 static void purge_old_ps_buffers(struct ieee80211_local *local)
360 int total = 0, purged = 0;
362 struct ieee80211_sub_if_data *sdata;
363 struct sta_info *sta;
365 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
368 if (sdata->vif.type == NL80211_IFTYPE_AP)
369 ps = &sdata->u.ap.ps;
370 else if (ieee80211_vif_is_mesh(&sdata->vif))
371 ps = &sdata->u.mesh.ps;
375 skb = skb_dequeue(&ps->bc_buf);
378 ieee80211_free_txskb(&local->hw, skb);
380 total += skb_queue_len(&ps->bc_buf);
384 * Drop one frame from each station from the lowest-priority
385 * AC that has frames at all.
387 list_for_each_entry_rcu(sta, &local->sta_list, list) {
390 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
391 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
392 total += skb_queue_len(&sta->ps_tx_buf[ac]);
395 ieee80211_free_txskb(&local->hw, skb);
401 local->total_ps_buffered = total;
402 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
405 static ieee80211_tx_result
406 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
408 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
409 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
413 * broadcast/multicast frame
415 * If any of the associated/peer stations is in power save mode,
416 * the frame is buffered to be sent after DTIM beacon frame.
417 * This is done either by the hardware or us.
420 /* powersaving STAs currently only in AP/VLAN/mesh mode */
421 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
422 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
426 ps = &tx->sdata->bss->ps;
427 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
428 ps = &tx->sdata->u.mesh.ps;
434 /* no buffering for ordered frames */
435 if (ieee80211_has_order(hdr->frame_control))
438 if (ieee80211_is_probe_req(hdr->frame_control))
441 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
442 info->hw_queue = tx->sdata->vif.cab_queue;
444 /* no stations in PS mode and no buffered packets */
445 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
448 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
450 /* device releases frame after DTIM beacon */
451 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
454 /* buffered in mac80211 */
455 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
456 purge_old_ps_buffers(tx->local);
458 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
460 "BC TX buffer full - dropping the oldest frame\n");
461 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
463 tx->local->total_ps_buffered++;
465 skb_queue_tail(&ps->bc_buf, tx->skb);
470 static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
473 if (!ieee80211_is_mgmt(fc))
476 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
479 if (!ieee80211_is_robust_mgmt_frame(skb))
485 static ieee80211_tx_result
486 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
488 struct sta_info *sta = tx->sta;
489 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
490 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
491 struct ieee80211_local *local = tx->local;
496 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
497 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
498 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
499 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
500 int ac = skb_get_queue_mapping(tx->skb);
502 if (ieee80211_is_mgmt(hdr->frame_control) &&
503 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
504 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
508 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
509 sta->sta.addr, sta->sta.aid, ac);
510 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
511 purge_old_ps_buffers(tx->local);
513 /* sync with ieee80211_sta_ps_deliver_wakeup */
514 spin_lock(&sta->ps_lock);
516 * STA woke up the meantime and all the frames on ps_tx_buf have
517 * been queued to pending queue. No reordering can happen, go
518 * ahead and Tx the packet.
520 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
521 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
522 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
523 spin_unlock(&sta->ps_lock);
527 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
528 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
530 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
532 ieee80211_free_txskb(&local->hw, old);
534 tx->local->total_ps_buffered++;
536 info->control.jiffies = jiffies;
537 info->control.vif = &tx->sdata->vif;
538 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
539 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
540 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
541 spin_unlock(&sta->ps_lock);
543 if (!timer_pending(&local->sta_cleanup))
544 mod_timer(&local->sta_cleanup,
545 round_jiffies(jiffies +
546 STA_INFO_CLEANUP_INTERVAL));
549 * We queued up some frames, so the TIM bit might
550 * need to be set, recalculate it.
552 sta_info_recalc_tim(sta);
555 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
557 "STA %pM in PS mode, but polling/in SP -> send frame\n",
564 static ieee80211_tx_result debug_noinline
565 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
567 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
570 if (tx->flags & IEEE80211_TX_UNICAST)
571 return ieee80211_tx_h_unicast_ps_buf(tx);
573 return ieee80211_tx_h_multicast_ps_buf(tx);
576 static ieee80211_tx_result debug_noinline
577 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
579 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
581 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
582 if (tx->sdata->control_port_no_encrypt)
583 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
584 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
585 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
591 static ieee80211_tx_result debug_noinline
592 ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
594 struct ieee80211_key *key;
595 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
596 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
598 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
604 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
606 else if (ieee80211_is_group_privacy_action(tx->skb) &&
607 (key = rcu_dereference(tx->sdata->default_multicast_key)))
609 else if (ieee80211_is_mgmt(hdr->frame_control) &&
610 is_multicast_ether_addr(hdr->addr1) &&
611 ieee80211_is_robust_mgmt_frame(tx->skb) &&
612 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
614 else if (is_multicast_ether_addr(hdr->addr1) &&
615 (key = rcu_dereference(tx->sdata->default_multicast_key)))
617 else if (!is_multicast_ether_addr(hdr->addr1) &&
618 (key = rcu_dereference(tx->sdata->default_unicast_key)))
624 bool skip_hw = false;
626 /* TODO: add threshold stuff again */
628 switch (tx->key->conf.cipher) {
629 case WLAN_CIPHER_SUITE_WEP40:
630 case WLAN_CIPHER_SUITE_WEP104:
631 case WLAN_CIPHER_SUITE_TKIP:
632 if (!ieee80211_is_data_present(hdr->frame_control))
635 case WLAN_CIPHER_SUITE_CCMP:
636 case WLAN_CIPHER_SUITE_CCMP_256:
637 case WLAN_CIPHER_SUITE_GCMP:
638 case WLAN_CIPHER_SUITE_GCMP_256:
639 if (!ieee80211_is_data_present(hdr->frame_control) &&
640 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
642 !ieee80211_is_group_privacy_action(tx->skb))
645 skip_hw = (tx->key->conf.flags &
646 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
647 ieee80211_is_mgmt(hdr->frame_control);
649 case WLAN_CIPHER_SUITE_AES_CMAC:
650 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
651 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
652 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
653 if (!ieee80211_is_mgmt(hdr->frame_control))
658 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
659 !ieee80211_is_deauth(hdr->frame_control)) &&
660 tx->skb->protocol != tx->sdata->control_port_protocol)
663 if (!skip_hw && tx->key &&
664 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
665 info->control.hw_key = &tx->key->conf;
666 } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta &&
667 test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) {
674 static ieee80211_tx_result debug_noinline
675 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
677 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
678 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
679 struct ieee80211_supported_band *sband;
681 struct ieee80211_tx_rate_control txrc;
682 struct ieee80211_sta_rates *ratetbl = NULL;
685 memset(&txrc, 0, sizeof(txrc));
687 sband = tx->local->hw.wiphy->bands[info->band];
689 len = min_t(u32, tx->skb->len + FCS_LEN,
690 tx->local->hw.wiphy->frag_threshold);
692 /* set up the tx rate control struct we give the RC algo */
693 txrc.hw = &tx->local->hw;
695 txrc.bss_conf = &tx->sdata->vif.bss_conf;
697 txrc.reported_rate.idx = -1;
698 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
700 if (tx->sdata->rc_has_mcs_mask[info->band])
701 txrc.rate_idx_mcs_mask =
702 tx->sdata->rc_rateidx_mcs_mask[info->band];
704 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
705 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
706 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
707 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
709 /* set up RTS protection if desired */
710 if (len > tx->local->hw.wiphy->rts_threshold) {
714 info->control.use_rts = txrc.rts;
715 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
718 * Use short preamble if the BSS can handle it, but not for
719 * management frames unless we know the receiver can handle
720 * that -- the management frame might be to a station that
721 * just wants a probe response.
723 if (tx->sdata->vif.bss_conf.use_short_preamble &&
724 (ieee80211_is_data(hdr->frame_control) ||
725 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
726 txrc.short_preamble = true;
728 info->control.short_preamble = txrc.short_preamble;
730 /* don't ask rate control when rate already injected via radiotap */
731 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
735 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
738 * Lets not bother rate control if we're associated and cannot
739 * talk to the sta. This should not happen.
741 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
742 !rate_usable_index_exists(sband, &tx->sta->sta),
743 "%s: Dropped data frame as no usable bitrate found while "
744 "scanning and associated. Target station: "
745 "%pM on %d GHz band\n",
746 tx->sdata->name, hdr->addr1,
751 * If we're associated with the sta at this point we know we can at
752 * least send the frame at the lowest bit rate.
754 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
756 if (tx->sta && !info->control.skip_table)
757 ratetbl = rcu_dereference(tx->sta->sta.rates);
759 if (unlikely(info->control.rates[0].idx < 0)) {
761 struct ieee80211_tx_rate rate = {
762 .idx = ratetbl->rate[0].idx,
763 .flags = ratetbl->rate[0].flags,
764 .count = ratetbl->rate[0].count
767 if (ratetbl->rate[0].idx < 0)
775 tx->rate = info->control.rates[0];
778 if (txrc.reported_rate.idx < 0) {
779 txrc.reported_rate = tx->rate;
780 if (tx->sta && ieee80211_is_data(hdr->frame_control))
781 tx->sta->tx_stats.last_rate = txrc.reported_rate;
783 tx->sta->tx_stats.last_rate = txrc.reported_rate;
788 if (unlikely(!info->control.rates[0].count))
789 info->control.rates[0].count = 1;
791 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
792 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
793 info->control.rates[0].count = 1;
798 static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
800 u16 *seq = &sta->tid_seq[tid];
801 __le16 ret = cpu_to_le16(*seq);
803 /* Increase the sequence number. */
804 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
809 static ieee80211_tx_result debug_noinline
810 ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
812 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
813 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
817 * Packet injection may want to control the sequence
818 * number, if we have no matching interface then we
819 * neither assign one ourselves nor ask the driver to.
821 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
824 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
827 if (ieee80211_hdrlen(hdr->frame_control) < 24)
830 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
833 if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
837 * Anything but QoS data that has a sequence number field
838 * (is long enough) gets a sequence number from the global
839 * counter. QoS data frames with a multicast destination
840 * also use the global counter (802.11-2012 9.3.2.10).
842 if (!ieee80211_is_data_qos(hdr->frame_control) ||
843 is_multicast_ether_addr(hdr->addr1)) {
844 /* driver should assign sequence number */
845 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
846 /* for pure STA mode without beacons, we can do it */
847 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
848 tx->sdata->sequence_number += 0x10;
850 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
855 * This should be true for injected/management frames only, for
856 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
857 * above since they are not QoS-data frames.
862 /* include per-STA, per-TID sequence counter */
863 tid = ieee80211_get_tid(hdr);
864 tx->sta->tx_stats.msdu[tid]++;
866 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
871 static int ieee80211_fragment(struct ieee80211_tx_data *tx,
872 struct sk_buff *skb, int hdrlen,
875 struct ieee80211_local *local = tx->local;
876 struct ieee80211_tx_info *info;
878 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
879 int pos = hdrlen + per_fragm;
880 int rem = skb->len - hdrlen - per_fragm;
882 if (WARN_ON(rem < 0))
885 /* first fragment was already added to queue by caller */
888 int fraglen = per_fragm;
893 tmp = dev_alloc_skb(local->tx_headroom +
895 tx->sdata->encrypt_headroom +
896 IEEE80211_ENCRYPT_TAILROOM);
900 __skb_queue_tail(&tx->skbs, tmp);
903 local->tx_headroom + tx->sdata->encrypt_headroom);
905 /* copy control information */
906 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
908 info = IEEE80211_SKB_CB(tmp);
909 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
910 IEEE80211_TX_CTL_FIRST_FRAGMENT);
913 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
915 skb_copy_queue_mapping(tmp, skb);
916 tmp->priority = skb->priority;
919 /* copy header and data */
920 skb_put_data(tmp, skb->data, hdrlen);
921 skb_put_data(tmp, skb->data + pos, fraglen);
926 /* adjust first fragment's length */
927 skb_trim(skb, hdrlen + per_fragm);
931 static ieee80211_tx_result debug_noinline
932 ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
934 struct sk_buff *skb = tx->skb;
935 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
936 struct ieee80211_hdr *hdr = (void *)skb->data;
937 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
941 /* no matter what happens, tx->skb moves to tx->skbs */
942 __skb_queue_tail(&tx->skbs, skb);
945 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
948 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
952 * Warn when submitting a fragmented A-MPDU frame and drop it.
953 * This scenario is handled in ieee80211_tx_prepare but extra
954 * caution taken here as fragmented ampdu may cause Tx stop.
956 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
959 hdrlen = ieee80211_hdrlen(hdr->frame_control);
961 /* internal error, why isn't DONTFRAG set? */
962 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
966 * Now fragment the frame. This will allocate all the fragments and
967 * chain them (using skb as the first fragment) to skb->next.
968 * During transmission, we will remove the successfully transmitted
969 * fragments from this list. When the low-level driver rejects one
970 * of the fragments then we will simply pretend to accept the skb
971 * but store it away as pending.
973 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
976 /* update duration/seq/flags of fragments */
979 skb_queue_walk(&tx->skbs, skb) {
980 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
982 hdr = (void *)skb->data;
983 info = IEEE80211_SKB_CB(skb);
985 if (!skb_queue_is_last(&tx->skbs, skb)) {
986 hdr->frame_control |= morefrags;
988 * No multi-rate retries for fragmented frames, that
989 * would completely throw off the NAV at other STAs.
991 info->control.rates[1].idx = -1;
992 info->control.rates[2].idx = -1;
993 info->control.rates[3].idx = -1;
994 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
995 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
997 hdr->frame_control &= ~morefrags;
999 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
1006 static ieee80211_tx_result debug_noinline
1007 ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1009 struct sk_buff *skb;
1015 skb_queue_walk(&tx->skbs, skb) {
1016 ac = skb_get_queue_mapping(skb);
1017 tx->sta->tx_stats.bytes[ac] += skb->len;
1020 tx->sta->tx_stats.packets[ac]++;
1025 static ieee80211_tx_result debug_noinline
1026 ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1031 switch (tx->key->conf.cipher) {
1032 case WLAN_CIPHER_SUITE_WEP40:
1033 case WLAN_CIPHER_SUITE_WEP104:
1034 return ieee80211_crypto_wep_encrypt(tx);
1035 case WLAN_CIPHER_SUITE_TKIP:
1036 return ieee80211_crypto_tkip_encrypt(tx);
1037 case WLAN_CIPHER_SUITE_CCMP:
1038 return ieee80211_crypto_ccmp_encrypt(
1039 tx, IEEE80211_CCMP_MIC_LEN);
1040 case WLAN_CIPHER_SUITE_CCMP_256:
1041 return ieee80211_crypto_ccmp_encrypt(
1042 tx, IEEE80211_CCMP_256_MIC_LEN);
1043 case WLAN_CIPHER_SUITE_AES_CMAC:
1044 return ieee80211_crypto_aes_cmac_encrypt(tx);
1045 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1046 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
1047 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1048 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1049 return ieee80211_crypto_aes_gmac_encrypt(tx);
1050 case WLAN_CIPHER_SUITE_GCMP:
1051 case WLAN_CIPHER_SUITE_GCMP_256:
1052 return ieee80211_crypto_gcmp_encrypt(tx);
1054 return ieee80211_crypto_hw_encrypt(tx);
1060 static ieee80211_tx_result debug_noinline
1061 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1063 struct sk_buff *skb;
1064 struct ieee80211_hdr *hdr;
1068 skb_queue_walk(&tx->skbs, skb) {
1069 hdr = (void *) skb->data;
1070 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1071 break; /* must not overwrite AID */
1072 if (!skb_queue_is_last(&tx->skbs, skb)) {
1073 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1074 next_len = next->len;
1077 group_addr = is_multicast_ether_addr(hdr->addr1);
1080 ieee80211_duration(tx, skb, group_addr, next_len);
1086 /* actual transmit path */
1088 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1089 struct sk_buff *skb,
1090 struct ieee80211_tx_info *info,
1091 struct tid_ampdu_tx *tid_tx,
1094 bool queued = false;
1095 bool reset_agg_timer = false;
1096 struct sk_buff *purge_skb = NULL;
1098 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1099 info->flags |= IEEE80211_TX_CTL_AMPDU;
1100 reset_agg_timer = true;
1101 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1103 * nothing -- this aggregation session is being started
1104 * but that might still fail with the driver
1106 } else if (!tx->sta->sta.txq[tid]) {
1107 spin_lock(&tx->sta->lock);
1109 * Need to re-check now, because we may get here
1111 * 1) in the window during which the setup is actually
1112 * already done, but not marked yet because not all
1113 * packets are spliced over to the driver pending
1114 * queue yet -- if this happened we acquire the lock
1115 * either before or after the splice happens, but
1116 * need to recheck which of these cases happened.
1118 * 2) during session teardown, if the OPERATIONAL bit
1119 * was cleared due to the teardown but the pointer
1120 * hasn't been assigned NULL yet (or we loaded it
1121 * before it was assigned) -- in this case it may
1122 * now be NULL which means we should just let the
1123 * packet pass through because splicing the frames
1124 * back is already done.
1126 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1129 /* do nothing, let packet pass through */
1130 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1131 info->flags |= IEEE80211_TX_CTL_AMPDU;
1132 reset_agg_timer = true;
1135 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1136 clear_sta_flag(tx->sta, WLAN_STA_SP);
1137 ps_dbg(tx->sta->sdata,
1138 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1139 tx->sta->sta.addr, tx->sta->sta.aid);
1141 info->control.vif = &tx->sdata->vif;
1142 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1143 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
1144 __skb_queue_tail(&tid_tx->pending, skb);
1145 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1146 purge_skb = __skb_dequeue(&tid_tx->pending);
1148 spin_unlock(&tx->sta->lock);
1151 ieee80211_free_txskb(&tx->local->hw, purge_skb);
1154 /* reset session timer */
1155 if (reset_agg_timer)
1156 tid_tx->last_tx = jiffies;
1163 * pass %NULL for the station if unknown, a valid pointer if known
1164 * or an ERR_PTR() if the station is known not to exist
1166 static ieee80211_tx_result
1167 ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1168 struct ieee80211_tx_data *tx,
1169 struct sta_info *sta, struct sk_buff *skb)
1171 struct ieee80211_local *local = sdata->local;
1172 struct ieee80211_hdr *hdr;
1173 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1176 memset(tx, 0, sizeof(*tx));
1180 __skb_queue_head_init(&tx->skbs);
1183 * If this flag is set to true anywhere, and we get here,
1184 * we are doing the needed processing, so remove the flag
1187 info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1189 hdr = (struct ieee80211_hdr *) skb->data;
1195 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1196 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1197 if (!tx->sta && sdata->wdev.use_4addr)
1199 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1200 IEEE80211_TX_CTL_INJECTED) ||
1201 tx->sdata->control_port_protocol == tx->skb->protocol) {
1202 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1204 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1205 tx->sta = sta_info_get(sdata, hdr->addr1);
1208 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
1209 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
1210 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1211 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1212 struct tid_ampdu_tx *tid_tx;
1214 tid = ieee80211_get_tid(hdr);
1216 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1220 queued = ieee80211_tx_prep_agg(tx, skb, info,
1223 if (unlikely(queued))
1228 if (is_multicast_ether_addr(hdr->addr1)) {
1229 tx->flags &= ~IEEE80211_TX_UNICAST;
1230 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1232 tx->flags |= IEEE80211_TX_UNICAST;
1234 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1235 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1236 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1237 info->flags & IEEE80211_TX_CTL_AMPDU)
1238 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1242 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1243 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
1244 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1245 ieee80211_check_fast_xmit(tx->sta);
1248 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1253 static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1254 struct ieee80211_vif *vif,
1255 struct sta_info *sta,
1256 struct sk_buff *skb)
1258 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1259 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1260 struct ieee80211_txq *txq = NULL;
1262 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1263 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1266 if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
1267 unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1268 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
1269 ieee80211_is_bufferable_mmpdu(hdr->frame_control) ||
1270 vif->type == NL80211_IFTYPE_STATION) &&
1271 sta && sta->uploaded) {
1273 * This will be NULL if the driver didn't set the
1274 * opt-in hardware flag.
1276 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1279 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1284 txq = sta->sta.txq[tid];
1292 return to_txq_info(txq);
1295 static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1297 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1300 static u32 codel_skb_len_func(const struct sk_buff *skb)
1305 static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1307 const struct ieee80211_tx_info *info;
1309 info = (const struct ieee80211_tx_info *)skb->cb;
1310 return info->control.enqueue_time;
1313 static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1316 struct ieee80211_local *local;
1317 struct txq_info *txqi;
1319 struct fq_flow *flow;
1322 local = vif_to_sdata(txqi->txq.vif)->local;
1325 if (cvars == &txqi->def_cvars)
1326 flow = &txqi->def_flow;
1328 flow = &fq->flows[cvars - local->cvars];
1330 return fq_flow_dequeue(fq, flow);
1333 static void codel_drop_func(struct sk_buff *skb,
1336 struct ieee80211_local *local;
1337 struct ieee80211_hw *hw;
1338 struct txq_info *txqi;
1341 local = vif_to_sdata(txqi->txq.vif)->local;
1344 ieee80211_free_txskb(hw, skb);
1347 static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1349 struct fq_flow *flow)
1351 struct ieee80211_local *local;
1352 struct txq_info *txqi;
1353 struct codel_vars *cvars;
1354 struct codel_params *cparams;
1355 struct codel_stats *cstats;
1357 local = container_of(fq, struct ieee80211_local, fq);
1358 txqi = container_of(tin, struct txq_info, tin);
1359 cstats = &txqi->cstats;
1361 if (txqi->txq.sta) {
1362 struct sta_info *sta = container_of(txqi->txq.sta,
1363 struct sta_info, sta);
1364 cparams = &sta->cparams;
1366 cparams = &local->cparams;
1369 if (flow == &txqi->def_flow)
1370 cvars = &txqi->def_cvars;
1372 cvars = &local->cvars[flow - fq->flows];
1374 return codel_dequeue(txqi,
1380 codel_skb_time_func,
1382 codel_dequeue_func);
1385 static void fq_skb_free_func(struct fq *fq,
1387 struct fq_flow *flow,
1388 struct sk_buff *skb)
1390 struct ieee80211_local *local;
1392 local = container_of(fq, struct ieee80211_local, fq);
1393 ieee80211_free_txskb(&local->hw, skb);
1396 static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1399 struct sk_buff *skb)
1401 struct txq_info *txqi;
1403 txqi = container_of(tin, struct txq_info, tin);
1404 return &txqi->def_flow;
1407 static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1408 struct txq_info *txqi,
1409 struct sk_buff *skb)
1411 struct fq *fq = &local->fq;
1412 struct fq_tin *tin = &txqi->tin;
1413 u32 flow_idx = fq_flow_idx(fq, skb);
1415 ieee80211_set_skb_enqueue_time(skb);
1417 spin_lock_bh(&fq->lock);
1418 fq_tin_enqueue(fq, tin, flow_idx, skb,
1420 fq_flow_get_default_func);
1421 spin_unlock_bh(&fq->lock);
1424 static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1425 struct fq_flow *flow, struct sk_buff *skb,
1428 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1430 return info->control.vif == data;
1433 void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1434 struct ieee80211_sub_if_data *sdata)
1436 struct fq *fq = &local->fq;
1437 struct txq_info *txqi;
1439 struct ieee80211_sub_if_data *ap;
1441 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1444 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1449 txqi = to_txq_info(ap->vif.txq);
1452 spin_lock_bh(&fq->lock);
1453 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1455 spin_unlock_bh(&fq->lock);
1458 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1459 struct sta_info *sta,
1460 struct txq_info *txqi, int tid)
1462 fq_tin_init(&txqi->tin);
1463 fq_flow_init(&txqi->def_flow);
1464 codel_vars_init(&txqi->def_cvars);
1465 codel_stats_init(&txqi->cstats);
1466 __skb_queue_head_init(&txqi->frags);
1467 INIT_LIST_HEAD(&txqi->schedule_order);
1469 txqi->txq.vif = &sdata->vif;
1472 sdata->vif.txq = &txqi->txq;
1474 txqi->txq.ac = IEEE80211_AC_BE;
1479 if (tid == IEEE80211_NUM_TIDS) {
1480 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1481 /* Drivers need to opt in to the management MPDU TXQ */
1482 if (!ieee80211_hw_check(&sdata->local->hw,
1485 } else if (!ieee80211_hw_check(&sdata->local->hw,
1487 /* Drivers need to opt in to the bufferable MMPDU TXQ */
1490 txqi->txq.ac = IEEE80211_AC_VO;
1492 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1495 txqi->txq.sta = &sta->sta;
1496 txqi->txq.tid = tid;
1497 sta->sta.txq[tid] = &txqi->txq;
1500 void ieee80211_txq_purge(struct ieee80211_local *local,
1501 struct txq_info *txqi)
1503 struct fq *fq = &local->fq;
1504 struct fq_tin *tin = &txqi->tin;
1506 spin_lock_bh(&fq->lock);
1507 fq_tin_reset(fq, tin, fq_skb_free_func);
1508 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
1509 spin_unlock_bh(&fq->lock);
1511 spin_lock_bh(&local->active_txq_lock[txqi->txq.ac]);
1512 list_del_init(&txqi->schedule_order);
1513 spin_unlock_bh(&local->active_txq_lock[txqi->txq.ac]);
1516 void ieee80211_txq_set_params(struct ieee80211_local *local)
1518 if (local->hw.wiphy->txq_limit)
1519 local->fq.limit = local->hw.wiphy->txq_limit;
1521 local->hw.wiphy->txq_limit = local->fq.limit;
1523 if (local->hw.wiphy->txq_memory_limit)
1524 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1526 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1528 if (local->hw.wiphy->txq_quantum)
1529 local->fq.quantum = local->hw.wiphy->txq_quantum;
1531 local->hw.wiphy->txq_quantum = local->fq.quantum;
1534 int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1536 struct fq *fq = &local->fq;
1539 bool supp_vht = false;
1540 enum nl80211_band band;
1542 if (!local->ops->wake_tx_queue)
1545 ret = fq_init(fq, 4096);
1550 * If the hardware doesn't support VHT, it is safe to limit the maximum
1551 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1553 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1554 struct ieee80211_supported_band *sband;
1556 sband = local->hw.wiphy->bands[band];
1560 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1564 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1566 codel_params_init(&local->cparams);
1567 local->cparams.interval = MS2TIME(100);
1568 local->cparams.target = MS2TIME(20);
1569 local->cparams.ecn = true;
1571 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1573 if (!local->cvars) {
1574 spin_lock_bh(&fq->lock);
1575 fq_reset(fq, fq_skb_free_func);
1576 spin_unlock_bh(&fq->lock);
1580 for (i = 0; i < fq->flows_cnt; i++)
1581 codel_vars_init(&local->cvars[i]);
1583 ieee80211_txq_set_params(local);
1588 void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1590 struct fq *fq = &local->fq;
1592 if (!local->ops->wake_tx_queue)
1595 kfree(local->cvars);
1596 local->cvars = NULL;
1598 spin_lock_bh(&fq->lock);
1599 fq_reset(fq, fq_skb_free_func);
1600 spin_unlock_bh(&fq->lock);
1603 static bool ieee80211_queue_skb(struct ieee80211_local *local,
1604 struct ieee80211_sub_if_data *sdata,
1605 struct sta_info *sta,
1606 struct sk_buff *skb)
1608 struct ieee80211_vif *vif;
1609 struct txq_info *txqi;
1611 if (!local->ops->wake_tx_queue ||
1612 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1615 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1616 sdata = container_of(sdata->bss,
1617 struct ieee80211_sub_if_data, u.ap);
1620 txqi = ieee80211_get_txq(local, vif, sta, skb);
1625 ieee80211_txq_enqueue(local, txqi, skb);
1627 schedule_and_wake_txq(local, txqi);
1632 static bool ieee80211_tx_frags(struct ieee80211_local *local,
1633 struct ieee80211_vif *vif,
1634 struct sta_info *sta,
1635 struct sk_buff_head *skbs,
1638 struct ieee80211_tx_control control = {};
1639 struct sk_buff *skb, *tmp;
1640 unsigned long flags;
1642 skb_queue_walk_safe(skbs, skb, tmp) {
1643 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1644 int q = info->hw_queue;
1646 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1647 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1648 __skb_unlink(skb, skbs);
1649 ieee80211_free_txskb(&local->hw, skb);
1654 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1655 if (local->queue_stop_reasons[q] ||
1656 (!txpending && !skb_queue_empty(&local->pending[q]))) {
1657 if (unlikely(info->flags &
1658 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1659 if (local->queue_stop_reasons[q] &
1660 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1662 * Drop off-channel frames if queues
1663 * are stopped for any reason other
1664 * than off-channel operation. Never
1667 spin_unlock_irqrestore(
1668 &local->queue_stop_reason_lock,
1670 ieee80211_purge_tx_queue(&local->hw,
1677 * Since queue is stopped, queue up frames for
1678 * later transmission from the tx-pending
1679 * tasklet when the queue is woken again.
1682 skb_queue_splice_init(skbs,
1683 &local->pending[q]);
1685 skb_queue_splice_tail_init(skbs,
1686 &local->pending[q]);
1688 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1693 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1695 info->control.vif = vif;
1696 control.sta = sta ? &sta->sta : NULL;
1698 __skb_unlink(skb, skbs);
1699 drv_tx(local, &control, skb);
1706 * Returns false if the frame couldn't be transmitted but was queued instead.
1708 static bool __ieee80211_tx(struct ieee80211_local *local,
1709 struct sk_buff_head *skbs, int led_len,
1710 struct sta_info *sta, bool txpending)
1712 struct ieee80211_tx_info *info;
1713 struct ieee80211_sub_if_data *sdata;
1714 struct ieee80211_vif *vif;
1715 struct sk_buff *skb;
1719 if (WARN_ON(skb_queue_empty(skbs)))
1722 skb = skb_peek(skbs);
1723 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1724 info = IEEE80211_SKB_CB(skb);
1725 sdata = vif_to_sdata(info->control.vif);
1726 if (sta && !sta->uploaded)
1729 switch (sdata->vif.type) {
1730 case NL80211_IFTYPE_MONITOR:
1731 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1735 sdata = rcu_dereference(local->monitor_sdata);
1739 vif->hw_queue[skb_get_queue_mapping(skb)];
1740 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1741 ieee80211_purge_tx_queue(&local->hw, skbs);
1746 case NL80211_IFTYPE_AP_VLAN:
1747 sdata = container_of(sdata->bss,
1748 struct ieee80211_sub_if_data, u.ap);
1755 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
1757 ieee80211_tpt_led_trig_tx(local, fc, led_len);
1759 WARN_ON_ONCE(!skb_queue_empty(skbs));
1765 * Invoke TX handlers, return 0 on success and non-zero if the
1766 * frame was dropped or queued.
1768 * The handlers are split into an early and late part. The latter is everything
1769 * that can be sensitive to reordering, and will be deferred to after packets
1770 * are dequeued from the intermediate queues (when they are enabled).
1772 static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1774 ieee80211_tx_result res = TX_DROP;
1776 #define CALL_TXH(txh) \
1779 if (res != TX_CONTINUE) \
1783 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1784 CALL_TXH(ieee80211_tx_h_check_assoc);
1785 CALL_TXH(ieee80211_tx_h_ps_buf);
1786 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1787 CALL_TXH(ieee80211_tx_h_select_key);
1788 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1789 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1792 if (unlikely(res == TX_DROP)) {
1793 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1795 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1797 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1799 } else if (unlikely(res == TX_QUEUED)) {
1800 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1808 * Late handlers can be called while the sta lock is held. Handlers that can
1809 * cause packets to be generated will cause deadlock!
1811 static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1813 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1814 ieee80211_tx_result res = TX_CONTINUE;
1816 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1817 __skb_queue_tail(&tx->skbs, tx->skb);
1822 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1823 CALL_TXH(ieee80211_tx_h_sequence);
1824 CALL_TXH(ieee80211_tx_h_fragment);
1825 /* handlers after fragment must be aware of tx info fragmentation! */
1826 CALL_TXH(ieee80211_tx_h_stats);
1827 CALL_TXH(ieee80211_tx_h_encrypt);
1828 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1829 CALL_TXH(ieee80211_tx_h_calculate_duration);
1833 if (unlikely(res == TX_DROP)) {
1834 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1836 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1838 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1840 } else if (unlikely(res == TX_QUEUED)) {
1841 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1848 static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1850 int r = invoke_tx_handlers_early(tx);
1854 return invoke_tx_handlers_late(tx);
1857 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1858 struct ieee80211_vif *vif, struct sk_buff *skb,
1859 int band, struct ieee80211_sta **sta)
1861 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1862 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1863 struct ieee80211_tx_data tx;
1864 struct sk_buff *skb2;
1866 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
1870 info->control.vif = vif;
1871 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1873 if (invoke_tx_handlers(&tx))
1878 *sta = &tx.sta->sta;
1883 /* this function isn't suitable for fragmented data frames */
1884 skb2 = __skb_dequeue(&tx.skbs);
1885 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1886 ieee80211_free_txskb(hw, skb2);
1887 ieee80211_purge_tx_queue(hw, &tx.skbs);
1893 EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1896 * Returns false if the frame couldn't be transmitted but was queued instead.
1898 static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1899 struct sta_info *sta, struct sk_buff *skb,
1902 struct ieee80211_local *local = sdata->local;
1903 struct ieee80211_tx_data tx;
1904 ieee80211_tx_result res_prepare;
1905 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1909 if (unlikely(skb->len < 10)) {
1914 /* initialises tx */
1916 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
1918 if (unlikely(res_prepare == TX_DROP)) {
1919 ieee80211_free_txskb(&local->hw, skb);
1921 } else if (unlikely(res_prepare == TX_QUEUED)) {
1925 /* set up hw_queue value early */
1926 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1927 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1929 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1931 if (invoke_tx_handlers_early(&tx))
1934 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1937 if (!invoke_tx_handlers_late(&tx))
1938 result = __ieee80211_tx(local, &tx.skbs, led_len,
1944 /* device xmit handlers */
1946 enum ieee80211_encrypt {
1952 static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1953 struct sk_buff *skb,
1955 enum ieee80211_encrypt encrypt)
1957 struct ieee80211_local *local = sdata->local;
1961 enc_tailroom = encrypt == ENCRYPT_MGMT ||
1962 (encrypt == ENCRYPT_DATA &&
1963 sdata->crypto_tx_tailroom_needed_cnt);
1966 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1967 tail_need -= skb_tailroom(skb);
1968 tail_need = max_t(int, tail_need, 0);
1971 if (skb_cloned(skb) &&
1972 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1973 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
1974 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1975 else if (head_need || tail_need)
1976 I802_DEBUG_INC(local->tx_expand_skb_head);
1980 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
1981 wiphy_debug(local->hw.wiphy,
1982 "failed to reallocate TX buffer\n");
1989 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1990 struct sta_info *sta, struct sk_buff *skb)
1992 struct ieee80211_local *local = sdata->local;
1993 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1994 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1996 enum ieee80211_encrypt encrypt;
1998 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
1999 encrypt = ENCRYPT_NO;
2000 else if (ieee80211_is_mgmt(hdr->frame_control))
2001 encrypt = ENCRYPT_MGMT;
2003 encrypt = ENCRYPT_DATA;
2005 headroom = local->tx_headroom;
2006 if (encrypt != ENCRYPT_NO)
2007 headroom += sdata->encrypt_headroom;
2008 headroom -= skb_headroom(skb);
2009 headroom = max_t(int, 0, headroom);
2011 if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) {
2012 ieee80211_free_txskb(&local->hw, skb);
2016 /* reload after potential resize */
2017 hdr = (struct ieee80211_hdr *) skb->data;
2018 info->control.vif = &sdata->vif;
2020 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2021 if (ieee80211_is_data(hdr->frame_control) &&
2022 is_unicast_ether_addr(hdr->addr1)) {
2023 if (mesh_nexthop_resolve(sdata, skb))
2024 return; /* skb queued: don't free */
2026 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2030 ieee80211_set_qos_hdr(sdata, skb);
2031 ieee80211_tx(sdata, sta, skb, false);
2034 static bool ieee80211_validate_radiotap_len(struct sk_buff *skb)
2036 struct ieee80211_radiotap_header *rthdr =
2037 (struct ieee80211_radiotap_header *)skb->data;
2039 /* check for not even having the fixed radiotap header part */
2040 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2041 return false; /* too short to be possibly valid */
2043 /* is it a header version we can trust to find length from? */
2044 if (unlikely(rthdr->it_version))
2045 return false; /* only version 0 is supported */
2047 /* does the skb contain enough to deliver on the alleged length? */
2048 if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data)))
2049 return false; /* skb too short for claimed rt header extent */
2054 bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
2055 struct net_device *dev)
2057 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2058 struct ieee80211_radiotap_iterator iterator;
2059 struct ieee80211_radiotap_header *rthdr =
2060 (struct ieee80211_radiotap_header *) skb->data;
2061 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2062 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2066 bool rate_found = false;
2067 u8 rate_retries = 0;
2069 u8 mcs_known, mcs_flags, mcs_bw;
2071 u8 vht_mcs = 0, vht_nss = 0;
2074 if (!ieee80211_validate_radiotap_len(skb))
2077 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2078 IEEE80211_TX_CTL_DONTFRAG;
2081 * for every radiotap entry that is present
2082 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2083 * entries present, or -EINVAL on error)
2087 ret = ieee80211_radiotap_iterator_next(&iterator);
2092 /* see if this argument is something we can use */
2093 switch (iterator.this_arg_index) {
2095 * You must take care when dereferencing iterator.this_arg
2096 * for multibyte types... the pointer is not aligned. Use
2097 * get_unaligned((type *)iterator.this_arg) to dereference
2098 * iterator.this_arg for type "type" safely on all arches.
2100 case IEEE80211_RADIOTAP_FLAGS:
2101 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2103 * this indicates that the skb we have been
2104 * handed has the 32-bit FCS CRC at the end...
2105 * we should react to that by snipping it off
2106 * because it will be recomputed and added
2109 if (skb->len < (iterator._max_length + FCS_LEN))
2112 skb_trim(skb, skb->len - FCS_LEN);
2114 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2115 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2116 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2117 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2120 case IEEE80211_RADIOTAP_TX_FLAGS:
2121 txflags = get_unaligned_le16(iterator.this_arg);
2122 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2123 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2124 if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO)
2125 info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO;
2128 case IEEE80211_RADIOTAP_RATE:
2129 rate = *iterator.this_arg;
2134 case IEEE80211_RADIOTAP_DATA_RETRIES:
2135 rate_retries = *iterator.this_arg;
2138 case IEEE80211_RADIOTAP_MCS:
2139 mcs_known = iterator.this_arg[0];
2140 mcs_flags = iterator.this_arg[1];
2141 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2145 rate = iterator.this_arg[2];
2146 rate_flags = IEEE80211_TX_RC_MCS;
2148 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2149 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2150 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2152 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2153 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2154 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2155 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2158 case IEEE80211_RADIOTAP_VHT:
2159 vht_known = get_unaligned_le16(iterator.this_arg);
2162 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2163 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2164 (iterator.this_arg[2] &
2165 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2166 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2168 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2169 if (iterator.this_arg[3] == 1)
2171 IEEE80211_TX_RC_40_MHZ_WIDTH;
2172 else if (iterator.this_arg[3] == 4)
2174 IEEE80211_TX_RC_80_MHZ_WIDTH;
2175 else if (iterator.this_arg[3] == 11)
2177 IEEE80211_TX_RC_160_MHZ_WIDTH;
2180 vht_mcs = iterator.this_arg[4] >> 4;
2183 vht_nss = iterator.this_arg[4] & 0xF;
2184 if (!vht_nss || vht_nss > 8)
2189 * Please update the file
2190 * Documentation/networking/mac80211-injection.rst
2191 * when parsing new fields here.
2199 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2203 struct ieee80211_supported_band *sband =
2204 local->hw.wiphy->bands[info->band];
2206 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2208 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2209 info->control.rates[i].idx = -1;
2210 info->control.rates[i].flags = 0;
2211 info->control.rates[i].count = 0;
2214 if (rate_flags & IEEE80211_TX_RC_MCS) {
2215 info->control.rates[0].idx = rate;
2216 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2217 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2220 for (i = 0; i < sband->n_bitrates; i++) {
2221 if (rate * 5 != sband->bitrates[i].bitrate)
2224 info->control.rates[0].idx = i;
2229 if (info->control.rates[0].idx < 0)
2230 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2232 info->control.rates[0].flags = rate_flags;
2233 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2234 local->hw.max_rate_tries);
2240 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2241 struct net_device *dev)
2243 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2244 struct ieee80211_chanctx_conf *chanctx_conf;
2245 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2246 struct ieee80211_hdr *hdr;
2247 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2248 struct cfg80211_chan_def *chandef;
2252 memset(info, 0, sizeof(*info));
2253 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2254 IEEE80211_TX_CTL_INJECTED;
2256 /* Sanity-check the length of the radiotap header */
2257 if (!ieee80211_validate_radiotap_len(skb))
2260 /* we now know there is a radiotap header with a length we can use */
2261 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2264 * fix up the pointers accounting for the radiotap
2265 * header still being in there. We are being given
2266 * a precooked IEEE80211 header so no need for
2269 skb_set_mac_header(skb, len_rthdr);
2271 * these are just fixed to the end of the rt area since we
2272 * don't have any better information and at this point, nobody cares
2274 skb_set_network_header(skb, len_rthdr);
2275 skb_set_transport_header(skb, len_rthdr);
2277 if (skb->len < len_rthdr + 2)
2280 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2281 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2283 if (skb->len < len_rthdr + hdrlen)
2287 * Initialize skb->protocol if the injected frame is a data frame
2288 * carrying a rfc1042 header
2290 if (ieee80211_is_data(hdr->frame_control) &&
2291 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2292 u8 *payload = (u8 *)hdr + hdrlen;
2294 if (ether_addr_equal(payload, rfc1042_header))
2295 skb->protocol = cpu_to_be16((payload[6] << 8) |
2300 * Initialize skb->priority for QoS frames. This is put in the TID field
2301 * of the frame before passing it to the driver.
2303 if (ieee80211_is_data_qos(hdr->frame_control)) {
2304 u8 *p = ieee80211_get_qos_ctl(hdr);
2305 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
2311 * We process outgoing injected frames that have a local address
2312 * we handle as though they are non-injected frames.
2313 * This code here isn't entirely correct, the local MAC address
2314 * isn't always enough to find the interface to use; for proper
2315 * VLAN/WDS support we will need a different mechanism (which
2316 * likely isn't going to be monitor interfaces).
2318 * This is necessary, for example, for old hostapd versions that
2319 * don't use nl80211-based management TX/RX.
2321 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2323 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2324 if (!ieee80211_sdata_running(tmp_sdata))
2326 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2327 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2328 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2330 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
2336 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2337 if (!chanctx_conf) {
2338 tmp_sdata = rcu_dereference(local->monitor_sdata);
2341 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2345 chandef = &chanctx_conf->def;
2346 else if (!local->use_chanctx)
2347 chandef = &local->_oper_chandef;
2352 * Frame injection is not allowed if beaconing is not allowed
2353 * or if we need radar detection. Beaconing is usually not allowed when
2354 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2355 * Passive scan is also used in world regulatory domains where
2356 * your country is not known and as such it should be treated as
2357 * NO TX unless the channel is explicitly allowed in which case
2358 * your current regulatory domain would not have the passive scan
2361 * Since AP mode uses monitor interfaces to inject/TX management
2362 * frames we can make AP mode the exception to this rule once it
2363 * supports radar detection as its implementation can deal with
2364 * radar detection by itself. We can do that later by adding a
2365 * monitor flag interfaces used for AP support.
2367 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2371 info->band = chandef->chan->band;
2374 * Process the radiotap header. This will now take into account the
2375 * selected chandef above to accurately set injection rates and
2378 if (!ieee80211_parse_tx_radiotap(skb, dev))
2381 /* remove the injection radiotap header */
2382 skb_pull(skb, len_rthdr);
2384 ieee80211_xmit(sdata, NULL, skb);
2387 return NETDEV_TX_OK;
2393 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
2396 static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2398 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2400 return ethertype == ETH_P_TDLS &&
2402 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2405 int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2406 struct sk_buff *skb,
2407 struct sta_info **sta_out)
2409 struct sta_info *sta;
2411 switch (sdata->vif.type) {
2412 case NL80211_IFTYPE_AP_VLAN:
2413 sta = rcu_dereference(sdata->u.vlan.sta);
2417 } else if (sdata->wdev.use_4addr) {
2421 case NL80211_IFTYPE_AP:
2422 case NL80211_IFTYPE_OCB:
2423 case NL80211_IFTYPE_ADHOC:
2424 if (is_multicast_ether_addr(skb->data)) {
2425 *sta_out = ERR_PTR(-ENOENT);
2428 sta = sta_info_get_bss(sdata, skb->data);
2430 case NL80211_IFTYPE_WDS:
2431 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2433 #ifdef CONFIG_MAC80211_MESH
2434 case NL80211_IFTYPE_MESH_POINT:
2435 /* determined much later */
2439 case NL80211_IFTYPE_STATION:
2440 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2441 sta = sta_info_get(sdata, skb->data);
2442 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2443 if (test_sta_flag(sta,
2444 WLAN_STA_TDLS_PEER_AUTH)) {
2450 * TDLS link during setup - throw out frames to
2451 * peer. Allow TDLS-setup frames to unauthorized
2452 * peers for the special case of a link teardown
2453 * after a TDLS sta is removed due to being
2456 if (!ieee80211_is_tdls_setup(skb))
2462 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2470 *sta_out = sta ?: ERR_PTR(-ENOENT);
2474 static u16 ieee80211_store_ack_skb(struct ieee80211_local *local,
2475 struct sk_buff *skb,
2479 struct sk_buff *ack_skb;
2483 ack_skb = skb_clone_sk(skb);
2485 ack_skb = skb_clone(skb, GFP_ATOMIC);
2488 unsigned long flags;
2491 spin_lock_irqsave(&local->ack_status_lock, flags);
2492 id = idr_alloc(&local->ack_status_frames, ack_skb,
2493 1, 0x2000, GFP_ATOMIC);
2494 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2498 *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2500 *cookie = ieee80211_mgmt_tx_cookie(local);
2501 IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
2512 * ieee80211_build_hdr - build 802.11 header in the given frame
2513 * @sdata: virtual interface to build the header for
2514 * @skb: the skb to build the header in
2515 * @info_flags: skb flags to set
2516 * @sta: the station pointer
2517 * @ctrl_flags: info control flags to set
2518 * @cookie: cookie pointer to fill (if not %NULL)
2520 * This function takes the skb with 802.3 header and reformats the header to
2521 * the appropriate IEEE 802.11 header based on which interface the packet is
2522 * being transmitted on.
2524 * Note that this function also takes care of the TX status request and
2525 * potential unsharing of the SKB - this needs to be interleaved with the
2528 * The function requires the read-side RCU lock held
2530 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2532 static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2533 struct sk_buff *skb, u32 info_flags,
2534 struct sta_info *sta, u32 ctrl_flags,
2537 struct ieee80211_local *local = sdata->local;
2538 struct ieee80211_tx_info *info;
2540 u16 ethertype, hdrlen, meshhdrlen = 0;
2542 struct ieee80211_hdr hdr;
2543 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2544 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2545 const u8 *encaps_data;
2546 int encaps_len, skip_header_bytes;
2547 bool wme_sta = false, authorized = false;
2551 struct ieee80211_chanctx_conf *chanctx_conf;
2552 struct ieee80211_sub_if_data *ap_sdata;
2553 enum nl80211_band band;
2559 #ifdef CONFIG_MAC80211_DEBUGFS
2560 if (local->force_tx_status)
2561 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2564 /* convert Ethernet header to proper 802.11 header (based on
2565 * operation mode) */
2566 ethertype = (skb->data[12] << 8) | skb->data[13];
2567 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2569 switch (sdata->vif.type) {
2570 case NL80211_IFTYPE_AP_VLAN:
2571 if (sdata->wdev.use_4addr) {
2572 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2574 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2575 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2576 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2577 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2579 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2580 wme_sta = sta->sta.wme;
2582 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2584 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
2585 if (!chanctx_conf) {
2589 band = chanctx_conf->def.chan->band;
2590 if (sdata->wdev.use_4addr)
2593 case NL80211_IFTYPE_AP:
2594 if (sdata->vif.type == NL80211_IFTYPE_AP)
2595 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2596 if (!chanctx_conf) {
2600 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2602 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2603 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2604 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2606 band = chanctx_conf->def.chan->band;
2608 case NL80211_IFTYPE_WDS:
2609 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2611 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
2612 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2613 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2614 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2617 * This is the exception! WDS style interfaces are prohibited
2618 * when channel contexts are in used so this must be valid
2620 band = local->hw.conf.chandef.chan->band;
2622 #ifdef CONFIG_MAC80211_MESH
2623 case NL80211_IFTYPE_MESH_POINT:
2624 if (!is_multicast_ether_addr(skb->data)) {
2625 struct sta_info *next_hop;
2626 bool mpp_lookup = true;
2628 mpath = mesh_path_lookup(sdata, skb->data);
2631 next_hop = rcu_dereference(mpath->next_hop);
2633 !(mpath->flags & (MESH_PATH_ACTIVE |
2634 MESH_PATH_RESOLVING)))
2639 mppath = mpp_path_lookup(sdata, skb->data);
2641 mppath->exp_time = jiffies;
2644 if (mppath && mpath)
2645 mesh_path_del(sdata, mpath->dst);
2649 * Use address extension if it is a packet from
2650 * another interface or if we know the destination
2651 * is being proxied by a portal (i.e. portal address
2652 * differs from proxied address)
2654 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2655 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
2656 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2657 skb->data, skb->data + ETH_ALEN);
2658 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2661 /* DS -> MBSS (802.11-2012 13.11.3.3).
2662 * For unicast with unknown forwarding information,
2663 * destination might be in the MBSS or if that fails
2664 * forwarded to another mesh gate. In either case
2665 * resolution will be handled in ieee80211_xmit(), so
2666 * leave the original DA. This also works for mcast */
2667 const u8 *mesh_da = skb->data;
2670 mesh_da = mppath->mpp;
2672 mesh_da = mpath->dst;
2674 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2675 mesh_da, sdata->vif.addr);
2676 if (is_multicast_ether_addr(mesh_da))
2677 /* DA TA mSA AE:SA */
2678 meshhdrlen = ieee80211_new_mesh_header(
2680 skb->data + ETH_ALEN, NULL);
2682 /* RA TA mDA mSA AE:DA SA */
2683 meshhdrlen = ieee80211_new_mesh_header(
2684 sdata, &mesh_hdr, skb->data,
2685 skb->data + ETH_ALEN);
2688 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2689 if (!chanctx_conf) {
2693 band = chanctx_conf->def.chan->band;
2695 /* For injected frames, fill RA right away as nexthop lookup
2698 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2699 is_zero_ether_addr(hdr.addr1))
2700 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2703 case NL80211_IFTYPE_STATION:
2704 /* we already did checks when looking up the RA STA */
2705 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
2709 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2710 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2711 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2713 } else if (sdata->u.mgd.use_4addr &&
2714 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2715 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2716 IEEE80211_FCTL_TODS);
2718 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2719 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2720 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2721 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2724 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2726 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2727 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2728 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2731 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2732 if (!chanctx_conf) {
2736 band = chanctx_conf->def.chan->band;
2738 case NL80211_IFTYPE_OCB:
2740 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2741 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2742 eth_broadcast_addr(hdr.addr3);
2744 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2745 if (!chanctx_conf) {
2749 band = chanctx_conf->def.chan->band;
2751 case NL80211_IFTYPE_ADHOC:
2753 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2754 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2755 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2757 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2758 if (!chanctx_conf) {
2762 band = chanctx_conf->def.chan->band;
2769 multicast = is_multicast_ether_addr(hdr.addr1);
2771 /* sta is always NULL for mesh */
2773 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2774 wme_sta = sta->sta.wme;
2775 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2776 /* For mesh, the use of the QoS header is mandatory */
2780 /* receiver does QoS (which also means we do) use it */
2782 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2787 * Drop unicast frames to unauthorised stations unless they are
2788 * EAPOL frames from the local station.
2790 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2791 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2792 !multicast && !authorized &&
2793 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2794 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
2795 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2796 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2797 sdata->name, hdr.addr1);
2800 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2806 if (unlikely(!multicast && ((skb->sk &&
2807 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) ||
2808 ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS)))
2809 info_id = ieee80211_store_ack_skb(local, skb, &info_flags,
2813 * If the skb is shared we need to obtain our own copy.
2815 if (skb_shared(skb)) {
2816 struct sk_buff *tmp_skb = skb;
2818 /* can't happen -- skb is a clone if info_id != 0 */
2821 skb = skb_clone(skb, GFP_ATOMIC);
2830 hdr.frame_control = fc;
2831 hdr.duration_id = 0;
2834 skip_header_bytes = ETH_HLEN;
2835 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2836 encaps_data = bridge_tunnel_header;
2837 encaps_len = sizeof(bridge_tunnel_header);
2838 skip_header_bytes -= 2;
2839 } else if (ethertype >= ETH_P_802_3_MIN) {
2840 encaps_data = rfc1042_header;
2841 encaps_len = sizeof(rfc1042_header);
2842 skip_header_bytes -= 2;
2848 skb_pull(skb, skip_header_bytes);
2849 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2852 * So we need to modify the skb header and hence need a copy of
2853 * that. The head_need variable above doesn't, so far, include
2854 * the needed header space that we don't need right away. If we
2855 * can, then we don't reallocate right now but only after the
2856 * frame arrives at the master device (if it does...)
2858 * If we cannot, however, then we will reallocate to include all
2859 * the ever needed space. Also, if we need to reallocate it anyway,
2860 * make it big enough for everything we may ever need.
2863 if (head_need > 0 || skb_cloned(skb)) {
2864 head_need += sdata->encrypt_headroom;
2865 head_need += local->tx_headroom;
2866 head_need = max_t(int, 0, head_need);
2867 if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) {
2868 ieee80211_free_txskb(&local->hw, skb);
2870 return ERR_PTR(-ENOMEM);
2875 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2877 #ifdef CONFIG_MAC80211_MESH
2879 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2882 if (ieee80211_is_data_qos(fc)) {
2883 __le16 *qos_control;
2885 qos_control = skb_push(skb, 2);
2886 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2888 * Maybe we could actually set some fields here, for now just
2889 * initialise to zero to indicate no special operation.
2893 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2895 skb_reset_mac_header(skb);
2897 info = IEEE80211_SKB_CB(skb);
2898 memset(info, 0, sizeof(*info));
2900 info->flags = info_flags;
2901 info->ack_frame_id = info_id;
2903 info->control.flags = ctrl_flags;
2908 return ERR_PTR(ret);
2912 * fast-xmit overview
2914 * The core idea of this fast-xmit is to remove per-packet checks by checking
2915 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2916 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2917 * much less work can be done per packet. For example, fragmentation must be
2918 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2921 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2922 * header and other data to aid packet processing in ieee80211_xmit_fast().
2924 * The most difficult part of this is that when any of these assumptions
2925 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2926 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2927 * since the per-packet code no longer checks the conditions. This is reflected
2928 * by the calls to these functions throughout the rest of the code, and must be
2929 * maintained if any of the TX path checks change.
2932 void ieee80211_check_fast_xmit(struct sta_info *sta)
2934 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2935 struct ieee80211_local *local = sta->local;
2936 struct ieee80211_sub_if_data *sdata = sta->sdata;
2937 struct ieee80211_hdr *hdr = (void *)build.hdr;
2938 struct ieee80211_chanctx_conf *chanctx_conf;
2941 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
2944 /* Locking here protects both the pointer itself, and against concurrent
2945 * invocations winning data access races to, e.g., the key pointer that
2947 * Without it, the invocation of this function right after the key
2948 * pointer changes wouldn't be sufficient, as another CPU could access
2949 * the pointer, then stall, and then do the cache update after the CPU
2950 * that invalidated the key.
2951 * With the locking, such scenarios cannot happen as the check for the
2952 * key and the fast-tx assignment are done atomically, so the CPU that
2953 * modifies the key will either wait or other one will see the key
2954 * cleared/changed already.
2956 spin_lock_bh(&sta->lock);
2957 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2958 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2959 sdata->vif.type == NL80211_IFTYPE_STATION)
2962 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED) || !sta->uploaded)
2965 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2966 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2967 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2968 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
2971 if (sdata->noack_map)
2974 /* fast-xmit doesn't handle fragmentation at all */
2975 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2976 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
2980 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2981 if (!chanctx_conf) {
2985 build.band = chanctx_conf->def.chan->band;
2988 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2990 switch (sdata->vif.type) {
2991 case NL80211_IFTYPE_ADHOC:
2993 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2994 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2995 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2998 case NL80211_IFTYPE_STATION:
2999 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
3001 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3002 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3003 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
3008 if (sdata->u.mgd.use_4addr) {
3009 /* non-regular ethertype cannot use the fastpath */
3010 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3011 IEEE80211_FCTL_TODS);
3013 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
3014 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3015 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3016 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3020 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
3022 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
3023 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3024 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3027 case NL80211_IFTYPE_AP_VLAN:
3028 if (sdata->wdev.use_4addr) {
3029 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3030 IEEE80211_FCTL_TODS);
3032 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
3033 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3034 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3035 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3040 case NL80211_IFTYPE_AP:
3041 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
3043 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3044 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3045 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
3049 /* not handled on fast-xmit */
3055 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3058 /* We store the key here so there's no point in using rcu_dereference()
3059 * but that's fine because the code that changes the pointers will call
3060 * this function after doing so. For a single CPU that would be enough,
3061 * for multiple see the comment above.
3063 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3065 build.key = rcu_access_pointer(sdata->default_unicast_key);
3067 bool gen_iv, iv_spc, mmic;
3069 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3070 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
3071 mmic = build.key->conf.flags &
3072 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3073 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3075 /* don't handle software crypto */
3076 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3079 /* Key is being removed */
3080 if (build.key->flags & KEY_FLAG_TAINTED)
3083 switch (build.key->conf.cipher) {
3084 case WLAN_CIPHER_SUITE_CCMP:
3085 case WLAN_CIPHER_SUITE_CCMP_256:
3087 build.pn_offs = build.hdr_len;
3088 if (gen_iv || iv_spc)
3089 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3091 case WLAN_CIPHER_SUITE_GCMP:
3092 case WLAN_CIPHER_SUITE_GCMP_256:
3094 build.pn_offs = build.hdr_len;
3095 if (gen_iv || iv_spc)
3096 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3098 case WLAN_CIPHER_SUITE_TKIP:
3099 /* cannot handle MMIC or IV generation in xmit-fast */
3103 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3105 case WLAN_CIPHER_SUITE_WEP40:
3106 case WLAN_CIPHER_SUITE_WEP104:
3107 /* cannot handle IV generation in fast-xmit */
3111 build.hdr_len += IEEE80211_WEP_IV_LEN;
3113 case WLAN_CIPHER_SUITE_AES_CMAC:
3114 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3115 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3116 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3118 "management cipher suite 0x%x enabled for data\n",
3119 build.key->conf.cipher);
3122 /* we don't know how to generate IVs for this at all */
3123 if (WARN_ON(gen_iv))
3125 /* pure hardware keys are OK, of course */
3126 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3128 /* cipher scheme might require space allocation */
3130 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3133 build.hdr_len += build.key->conf.iv_len;
3136 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3139 hdr->frame_control = fc;
3141 memcpy(build.hdr + build.hdr_len,
3142 rfc1042_header, sizeof(rfc1042_header));
3143 build.hdr_len += sizeof(rfc1042_header);
3145 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3146 /* if the kmemdup fails, continue w/o fast_tx */
3151 /* we might have raced against another call to this function */
3152 old = rcu_dereference_protected(sta->fast_tx,
3153 lockdep_is_held(&sta->lock));
3154 rcu_assign_pointer(sta->fast_tx, fast_tx);
3156 kfree_rcu(old, rcu_head);
3157 spin_unlock_bh(&sta->lock);
3160 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3162 struct sta_info *sta;
3165 list_for_each_entry_rcu(sta, &local->sta_list, list)
3166 ieee80211_check_fast_xmit(sta);
3170 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3172 struct ieee80211_local *local = sdata->local;
3173 struct sta_info *sta;
3177 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3178 if (sdata != sta->sdata &&
3179 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3181 ieee80211_check_fast_xmit(sta);
3187 void ieee80211_clear_fast_xmit(struct sta_info *sta)
3189 struct ieee80211_fast_tx *fast_tx;
3191 spin_lock_bh(&sta->lock);
3192 fast_tx = rcu_dereference_protected(sta->fast_tx,
3193 lockdep_is_held(&sta->lock));
3194 RCU_INIT_POINTER(sta->fast_tx, NULL);
3195 spin_unlock_bh(&sta->lock);
3198 kfree_rcu(fast_tx, rcu_head);
3201 static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3202 struct sk_buff *skb, int headroom)
3204 if (skb_headroom(skb) < headroom) {
3205 I802_DEBUG_INC(local->tx_expand_skb_head);
3207 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
3208 wiphy_debug(local->hw.wiphy,
3209 "failed to reallocate TX buffer\n");
3217 static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3218 struct ieee80211_fast_tx *fast_tx,
3219 struct sk_buff *skb)
3221 struct ieee80211_local *local = sdata->local;
3222 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3223 struct ieee80211_hdr *hdr;
3224 struct ethhdr *amsdu_hdr;
3225 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3226 int subframe_len = skb->len - hdr_len;
3228 u8 *qc, *h_80211_src, *h_80211_dst;
3231 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3234 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3237 if (!ieee80211_amsdu_realloc_pad(local, skb,
3238 sizeof(*amsdu_hdr) +
3239 local->hw.extra_tx_headroom))
3242 data = skb_push(skb, sizeof(*amsdu_hdr));
3243 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3245 amsdu_hdr = data + hdr_len;
3246 /* h_80211_src/dst is addr* field within hdr */
3247 h_80211_src = data + fast_tx->sa_offs;
3248 h_80211_dst = data + fast_tx->da_offs;
3250 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3251 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3252 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3254 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3255 * fields needs to be changed to BSSID for A-MSDU frames depending
3256 * on FromDS/ToDS values.
3258 switch (sdata->vif.type) {
3259 case NL80211_IFTYPE_STATION:
3260 bssid = sdata->u.mgd.bssid;
3262 case NL80211_IFTYPE_AP:
3263 case NL80211_IFTYPE_AP_VLAN:
3264 bssid = sdata->vif.addr;
3270 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3271 ether_addr_copy(h_80211_src, bssid);
3273 if (bssid && ieee80211_has_tods(hdr->frame_control))
3274 ether_addr_copy(h_80211_dst, bssid);
3276 qc = ieee80211_get_qos_ctl(hdr);
3277 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3279 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3284 static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3285 struct sta_info *sta,
3286 struct ieee80211_fast_tx *fast_tx,
3287 struct sk_buff *skb)
3289 struct ieee80211_local *local = sdata->local;
3290 struct fq *fq = &local->fq;
3292 struct fq_flow *flow;
3293 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3294 struct ieee80211_txq *txq = sta->sta.txq[tid];
3295 struct txq_info *txqi;
3296 struct sk_buff **frag_tail, *head;
3297 int subframe_len = skb->len - ETH_ALEN;
3298 u8 max_subframes = sta->sta.max_amsdu_subframes;
3299 int max_frags = local->hw.max_tx_fragments;
3300 int max_amsdu_len = sta->sta.max_amsdu_len;
3306 unsigned int orig_len;
3307 int n = 2, nfrags, pad = 0;
3310 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3313 if (skb_is_gso(skb))
3319 txqi = to_txq_info(txq);
3320 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3323 if (sta->sta.max_rc_amsdu_len)
3324 max_amsdu_len = min_t(int, max_amsdu_len,
3325 sta->sta.max_rc_amsdu_len);
3327 if (sta->sta.max_tid_amsdu_len[tid])
3328 max_amsdu_len = min_t(int, max_amsdu_len,
3329 sta->sta.max_tid_amsdu_len[tid]);
3331 flow_idx = fq_flow_idx(fq, skb);
3333 spin_lock_bh(&fq->lock);
3335 /* TODO: Ideally aggregation should be done on dequeue to remain
3336 * responsive to environment changes.
3340 flow = fq_flow_classify(fq, tin, flow_idx, skb,
3341 fq_flow_get_default_func);
3342 head = skb_peek_tail(&flow->queue);
3343 if (!head || skb_is_gso(head))
3346 orig_truesize = head->truesize;
3347 orig_len = head->len;
3349 if (skb->len + head->len > max_amsdu_len)
3352 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3353 nfrags += 1 + skb_shinfo(head)->nr_frags;
3354 frag_tail = &skb_shinfo(head)->frag_list;
3355 while (*frag_tail) {
3356 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3357 frag_tail = &(*frag_tail)->next;
3361 if (max_subframes && n > max_subframes)
3364 if (max_frags && nfrags > max_frags)
3367 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3370 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3373 /* If n == 2, the "while (*frag_tail)" loop above didn't execute
3374 * and frag_tail should be &skb_shinfo(head)->frag_list.
3375 * However, ieee80211_amsdu_prepare_head() can reallocate it.
3376 * Reload frag_tail to have it pointing to the correct place.
3379 frag_tail = &skb_shinfo(head)->frag_list;
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;
3417 fq_recalc_backlog(fq, tin, flow);
3420 spin_unlock_bh(&fq->lock);
3426 * Can be called while the sta lock is held. Anything that can cause packets to
3427 * be generated will cause deadlock!
3429 static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3430 struct sta_info *sta, u8 pn_offs,
3431 struct ieee80211_key *key,
3432 struct sk_buff *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;
3439 info->control.hw_key = &key->conf;
3441 ieee80211_tx_stats(skb->dev, skb->len);
3443 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3444 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3445 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3447 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3448 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3449 sdata->sequence_number += 0x10;
3452 if (skb_shinfo(skb)->gso_size)
3453 sta->tx_stats.msdu[tid] +=
3454 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3456 sta->tx_stats.msdu[tid]++;
3458 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3460 /* statistics normally done by ieee80211_tx_h_stats (but that
3461 * has to consider fragmentation, so is more complex)
3463 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3464 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3468 u8 *crypto_hdr = skb->data + pn_offs;
3470 switch (key->conf.cipher) {
3471 case WLAN_CIPHER_SUITE_CCMP:
3472 case WLAN_CIPHER_SUITE_CCMP_256:
3473 case WLAN_CIPHER_SUITE_GCMP:
3474 case WLAN_CIPHER_SUITE_GCMP_256:
3475 pn = atomic64_inc_return(&key->conf.tx_pn);
3477 crypto_hdr[1] = pn >> 8;
3478 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3479 crypto_hdr[4] = pn >> 16;
3480 crypto_hdr[5] = pn >> 24;
3481 crypto_hdr[6] = pn >> 32;
3482 crypto_hdr[7] = pn >> 40;
3488 static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3489 struct sta_info *sta,
3490 struct ieee80211_fast_tx *fast_tx,
3491 struct sk_buff *skb)
3493 struct ieee80211_local *local = sdata->local;
3494 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3495 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3496 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3498 struct ieee80211_tx_info *info;
3499 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3500 struct ieee80211_tx_data tx;
3501 ieee80211_tx_result r;
3502 struct tid_ampdu_tx *tid_tx = NULL;
3503 u8 tid = IEEE80211_NUM_TIDS;
3505 /* control port protocol needs a lot of special handling */
3506 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3509 /* only RFC 1042 SNAP */
3510 if (ethertype < ETH_P_802_3_MIN)
3513 /* don't handle TX status request here either */
3514 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3517 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3518 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3519 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3521 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3523 if (tid_tx->timeout)
3524 tid_tx->last_tx = jiffies;
3528 /* after this point (skb is modified) we cannot return false */
3530 if (skb_shared(skb)) {
3531 struct sk_buff *tmp_skb = skb;
3533 skb = skb_clone(skb, GFP_ATOMIC);
3540 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3541 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3544 /* will not be crypto-handled beyond what we do here, so use false
3545 * as the may-encrypt argument for the resize to not account for
3546 * more room than we already have in 'extra_head'
3548 if (unlikely(ieee80211_skb_resize(sdata, skb,
3549 max_t(int, extra_head + hw_headroom -
3550 skb_headroom(skb), 0),
3556 memcpy(ð, skb->data, ETH_HLEN - 2);
3557 hdr = skb_push(skb, extra_head);
3558 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3559 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3560 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3562 info = IEEE80211_SKB_CB(skb);
3563 memset(info, 0, sizeof(*info));
3564 info->band = fast_tx->band;
3565 info->control.vif = &sdata->vif;
3566 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3567 IEEE80211_TX_CTL_DONTFRAG |
3568 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3569 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
3571 #ifdef CONFIG_MAC80211_DEBUGFS
3572 if (local->force_tx_status)
3573 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3576 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3577 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3578 *ieee80211_get_qos_ctl(hdr) = tid;
3581 __skb_queue_head_init(&tx.skbs);
3583 tx.flags = IEEE80211_TX_UNICAST;
3587 tx.key = fast_tx->key;
3589 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3591 r = ieee80211_tx_h_rate_ctrl(&tx);
3595 if (r != TX_CONTINUE) {
3602 if (ieee80211_queue_skb(local, sdata, sta, skb))
3605 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3608 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3609 sdata = container_of(sdata->bss,
3610 struct ieee80211_sub_if_data, u.ap);
3612 __skb_queue_tail(&tx.skbs, skb);
3613 ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false);
3617 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3618 struct ieee80211_txq *txq)
3620 struct ieee80211_local *local = hw_to_local(hw);
3621 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3622 struct ieee80211_hdr *hdr;
3623 struct sk_buff *skb = NULL;
3624 struct fq *fq = &local->fq;
3625 struct fq_tin *tin = &txqi->tin;
3626 struct ieee80211_tx_info *info;
3627 struct ieee80211_tx_data tx;
3628 ieee80211_tx_result r;
3629 struct ieee80211_vif *vif = txq->vif;
3631 WARN_ON_ONCE(softirq_count() == 0);
3633 if (!ieee80211_txq_airtime_check(hw, txq))
3637 spin_lock_bh(&fq->lock);
3639 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) ||
3640 test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags))
3643 if (vif->txqs_stopped[txq->ac]) {
3644 set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags);
3648 /* Make sure fragments stay together. */
3649 skb = __skb_dequeue(&txqi->frags);
3653 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3657 spin_unlock_bh(&fq->lock);
3659 hdr = (struct ieee80211_hdr *)skb->data;
3660 info = IEEE80211_SKB_CB(skb);
3662 memset(&tx, 0, sizeof(tx));
3663 __skb_queue_head_init(&tx.skbs);
3666 tx.sdata = vif_to_sdata(info->control.vif);
3669 tx.sta = container_of(txq->sta, struct sta_info, sta);
3671 * Drop unicast frames to unauthorised stations unless they are
3672 * injected frames or EAPOL frames from the local station.
3674 if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
3675 ieee80211_is_data(hdr->frame_control) &&
3676 !ieee80211_vif_is_mesh(&tx.sdata->vif) &&
3677 tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3678 !is_multicast_ether_addr(hdr->addr1) &&
3679 !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3680 (!(info->control.flags &
3681 IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3682 !ether_addr_equal(tx.sdata->vif.addr,
3684 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3685 ieee80211_free_txskb(&local->hw, skb);
3691 * The key can be removed while the packet was queued, so need to call
3692 * this here to get the current key.
3694 r = ieee80211_tx_h_select_key(&tx);
3695 if (r != TX_CONTINUE) {
3696 ieee80211_free_txskb(&local->hw, skb);
3700 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3701 info->flags |= IEEE80211_TX_CTL_AMPDU;
3703 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3705 if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
3708 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3709 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3714 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3715 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3717 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3720 if (invoke_tx_handlers_late(&tx))
3723 skb = __skb_dequeue(&tx.skbs);
3724 info = IEEE80211_SKB_CB(skb);
3726 if (!skb_queue_empty(&tx.skbs)) {
3727 spin_lock_bh(&fq->lock);
3728 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
3729 spin_unlock_bh(&fq->lock);
3733 if (skb_has_frag_list(skb) &&
3734 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3735 if (skb_linearize(skb)) {
3736 ieee80211_free_txskb(&local->hw, skb);
3741 switch (tx.sdata->vif.type) {
3742 case NL80211_IFTYPE_MONITOR:
3743 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3744 vif = &tx.sdata->vif;
3747 tx.sdata = rcu_dereference(local->monitor_sdata);
3749 vif = &tx.sdata->vif;
3751 vif->hw_queue[skb_get_queue_mapping(skb)];
3752 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3753 ieee80211_free_txskb(&local->hw, skb);
3759 case NL80211_IFTYPE_AP_VLAN:
3760 tx.sdata = container_of(tx.sdata->bss,
3761 struct ieee80211_sub_if_data, u.ap);
3764 vif = &tx.sdata->vif;
3769 info->control.vif = vif;
3772 wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) {
3773 bool ampdu = txq->ac != IEEE80211_AC_VO;
3776 airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta,
3779 airtime = ieee80211_info_set_tx_time_est(info, airtime);
3780 ieee80211_sta_update_pending_airtime(local, tx.sta,
3790 spin_unlock_bh(&fq->lock);
3794 EXPORT_SYMBOL(ieee80211_tx_dequeue);
3796 struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
3798 struct ieee80211_local *local = hw_to_local(hw);
3799 struct ieee80211_txq *ret = NULL;
3800 struct txq_info *txqi = NULL, *head = NULL;
3801 bool found_eligible_txq = false;
3803 spin_lock_bh(&local->active_txq_lock[ac]);
3806 txqi = list_first_entry_or_null(&local->active_txqs[ac],
3813 if (!found_eligible_txq)
3816 found_eligible_txq = false;
3822 if (txqi->txq.sta) {
3823 struct sta_info *sta = container_of(txqi->txq.sta,
3824 struct sta_info, sta);
3825 bool aql_check = ieee80211_txq_airtime_check(hw, &txqi->txq);
3826 s64 deficit = sta->airtime[txqi->txq.ac].deficit;
3829 found_eligible_txq = true;
3832 sta->airtime[txqi->txq.ac].deficit +=
3833 sta->airtime_weight;
3835 if (deficit < 0 || !aql_check) {
3836 list_move_tail(&txqi->schedule_order,
3837 &local->active_txqs[txqi->txq.ac]);
3843 if (txqi->schedule_round == local->schedule_round[ac])
3846 list_del_init(&txqi->schedule_order);
3847 txqi->schedule_round = local->schedule_round[ac];
3851 spin_unlock_bh(&local->active_txq_lock[ac]);
3854 EXPORT_SYMBOL(ieee80211_next_txq);
3856 void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
3857 struct ieee80211_txq *txq,
3860 struct ieee80211_local *local = hw_to_local(hw);
3861 struct txq_info *txqi = to_txq_info(txq);
3863 spin_lock_bh(&local->active_txq_lock[txq->ac]);
3865 if (list_empty(&txqi->schedule_order) &&
3866 (force || !skb_queue_empty(&txqi->frags) ||
3867 txqi->tin.backlog_packets)) {
3868 /* If airtime accounting is active, always enqueue STAs at the
3869 * head of the list to ensure that they only get moved to the
3870 * back by the airtime DRR scheduler once they have a negative
3871 * deficit. A station that already has a negative deficit will
3872 * get immediately moved to the back of the list on the next
3873 * call to ieee80211_next_txq().
3875 if (txqi->txq.sta && local->airtime_flags &&
3876 wiphy_ext_feature_isset(local->hw.wiphy,
3877 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
3878 list_add(&txqi->schedule_order,
3879 &local->active_txqs[txq->ac]);
3881 list_add_tail(&txqi->schedule_order,
3882 &local->active_txqs[txq->ac]);
3885 spin_unlock_bh(&local->active_txq_lock[txq->ac]);
3887 EXPORT_SYMBOL(__ieee80211_schedule_txq);
3889 bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
3890 struct ieee80211_txq *txq)
3892 struct sta_info *sta;
3893 struct ieee80211_local *local = hw_to_local(hw);
3895 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
3901 sta = container_of(txq->sta, struct sta_info, sta);
3902 if (atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
3903 sta->airtime[txq->ac].aql_limit_low)
3906 if (atomic_read(&local->aql_total_pending_airtime) <
3907 local->aql_threshold &&
3908 atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
3909 sta->airtime[txq->ac].aql_limit_high)
3914 EXPORT_SYMBOL(ieee80211_txq_airtime_check);
3916 bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
3917 struct ieee80211_txq *txq)
3919 struct ieee80211_local *local = hw_to_local(hw);
3920 struct txq_info *iter, *tmp, *txqi = to_txq_info(txq);
3921 struct sta_info *sta;
3924 spin_lock_bh(&local->active_txq_lock[ac]);
3929 if (list_empty(&txqi->schedule_order))
3932 list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac],
3937 if (!iter->txq.sta) {
3938 list_move_tail(&iter->schedule_order,
3939 &local->active_txqs[ac]);
3942 sta = container_of(iter->txq.sta, struct sta_info, sta);
3943 if (sta->airtime[ac].deficit < 0)
3944 sta->airtime[ac].deficit += sta->airtime_weight;
3945 list_move_tail(&iter->schedule_order, &local->active_txqs[ac]);
3948 sta = container_of(txqi->txq.sta, struct sta_info, sta);
3949 if (sta->airtime[ac].deficit >= 0)
3952 sta->airtime[ac].deficit += sta->airtime_weight;
3953 list_move_tail(&txqi->schedule_order, &local->active_txqs[ac]);
3954 spin_unlock_bh(&local->active_txq_lock[ac]);
3958 if (!list_empty(&txqi->schedule_order))
3959 list_del_init(&txqi->schedule_order);
3960 spin_unlock_bh(&local->active_txq_lock[ac]);
3964 EXPORT_SYMBOL(ieee80211_txq_may_transmit);
3966 void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
3968 struct ieee80211_local *local = hw_to_local(hw);
3970 spin_lock_bh(&local->active_txq_lock[ac]);
3971 local->schedule_round[ac]++;
3972 spin_unlock_bh(&local->active_txq_lock[ac]);
3974 EXPORT_SYMBOL(ieee80211_txq_schedule_start);
3976 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3977 struct net_device *dev,
3982 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3983 struct ieee80211_local *local = sdata->local;
3984 struct sta_info *sta;
3985 struct sk_buff *next;
3987 if (unlikely(skb->len < ETH_HLEN)) {
3994 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
4000 if (local->ops->wake_tx_queue) {
4001 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4002 skb_set_queue_mapping(skb, queue);
4007 struct ieee80211_fast_tx *fast_tx;
4009 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
4011 fast_tx = rcu_dereference(sta->fast_tx);
4014 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
4018 if (skb_is_gso(skb)) {
4019 struct sk_buff *segs;
4021 segs = skb_gso_segment(skb, 0);
4029 /* we cannot process non-linear frames on this path */
4030 if (skb_linearize(skb)) {
4035 /* the frame could be fragmented, software-encrypted, and other
4036 * things so we cannot really handle checksum offload with it -
4037 * fix it up in software before we handle anything else.
4039 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4040 skb_set_transport_header(skb,
4041 skb_checksum_start_offset(skb));
4042 if (skb_checksum_help(skb))
4047 skb_list_walk_safe(skb, skb, next) {
4048 skb_mark_not_on_list(skb);
4050 if (skb->protocol == sdata->control_port_protocol)
4051 ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
4053 skb = ieee80211_build_hdr(sdata, skb, info_flags,
4054 sta, ctrl_flags, cookie);
4056 kfree_skb_list(next);
4060 ieee80211_tx_stats(dev, skb->len);
4062 ieee80211_xmit(sdata, sta, skb);
4071 static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
4076 err = skb_ensure_writable(skb, ETH_HLEN);
4080 eth = (void *)skb->data;
4081 ether_addr_copy(eth->h_dest, sta->sta.addr);
4086 static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
4087 struct net_device *dev)
4089 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4090 const struct ethhdr *eth = (void *)skb->data;
4091 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
4094 if (likely(!is_multicast_ether_addr(eth->h_dest)))
4097 switch (sdata->vif.type) {
4098 case NL80211_IFTYPE_AP_VLAN:
4099 if (sdata->u.vlan.sta)
4101 if (sdata->wdev.use_4addr)
4104 case NL80211_IFTYPE_AP:
4105 /* check runtime toggle for this bss */
4106 if (!sdata->bss->multicast_to_unicast)
4113 /* multicast to unicast conversion only for some payload */
4114 ethertype = eth->h_proto;
4115 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4116 ethertype = ethvlan->h_vlan_encapsulated_proto;
4117 switch (ethertype) {
4118 case htons(ETH_P_ARP):
4119 case htons(ETH_P_IP):
4120 case htons(ETH_P_IPV6):
4130 ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4131 struct sk_buff_head *queue)
4133 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4134 struct ieee80211_local *local = sdata->local;
4135 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4136 struct sta_info *sta, *first = NULL;
4137 struct sk_buff *cloned_skb;
4141 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4142 if (sdata != sta->sdata)
4143 /* AP-VLAN mismatch */
4145 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4146 /* do not send back to source */
4152 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4155 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4156 dev_kfree_skb(cloned_skb);
4159 __skb_queue_tail(queue, cloned_skb);
4162 if (likely(first)) {
4163 if (unlikely(ieee80211_change_da(skb, first)))
4165 __skb_queue_tail(queue, skb);
4167 /* no STA connected, drop */
4174 __skb_queue_purge(queue);
4175 __skb_queue_tail(queue, skb);
4181 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4182 * @skb: packet to be sent
4183 * @dev: incoming interface
4185 * On failure skb will be freed.
4187 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4188 struct net_device *dev)
4190 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4191 struct sk_buff_head queue;
4193 __skb_queue_head_init(&queue);
4194 ieee80211_convert_to_unicast(skb, dev, &queue);
4195 while ((skb = __skb_dequeue(&queue)))
4196 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4198 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4201 return NETDEV_TX_OK;
4204 static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4205 struct sk_buff *skb, int led_len,
4206 struct sta_info *sta,
4209 struct ieee80211_local *local = sdata->local;
4210 struct ieee80211_tx_control control = {};
4211 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4212 struct ieee80211_sta *pubsta = NULL;
4213 unsigned long flags;
4214 int q = info->hw_queue;
4216 if (ieee80211_queue_skb(local, sdata, sta, skb))
4219 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4221 if (local->queue_stop_reasons[q] ||
4222 (!txpending && !skb_queue_empty(&local->pending[q]))) {
4224 skb_queue_head(&local->pending[q], skb);
4226 skb_queue_tail(&local->pending[q], skb);
4228 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4233 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4235 if (sta && sta->uploaded)
4238 control.sta = pubsta;
4240 drv_tx(local, &control, skb);
4245 static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
4246 struct net_device *dev, struct sta_info *sta,
4247 struct ieee80211_key *key, struct sk_buff *skb)
4249 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4250 struct ieee80211_local *local = sdata->local;
4251 struct tid_ampdu_tx *tid_tx;
4254 if (local->ops->wake_tx_queue) {
4255 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4256 skb_set_queue_mapping(skb, queue);
4260 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) &&
4261 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
4264 memset(info, 0, sizeof(*info));
4266 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
4267 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
4269 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
4270 /* fall back to non-offload slow path */
4271 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4275 info->flags |= IEEE80211_TX_CTL_AMPDU;
4276 if (tid_tx->timeout)
4277 tid_tx->last_tx = jiffies;
4280 if (unlikely(skb->sk &&
4281 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS))
4282 info->ack_frame_id = ieee80211_store_ack_skb(local, skb,
4283 &info->flags, NULL);
4285 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
4287 ieee80211_tx_stats(dev, skb->len);
4289 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
4290 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
4292 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4293 sdata = container_of(sdata->bss,
4294 struct ieee80211_sub_if_data, u.ap);
4296 info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP;
4297 info->control.vif = &sdata->vif;
4300 info->control.hw_key = &key->conf;
4302 ieee80211_tx_8023(sdata, skb, skb->len, sta, false);
4310 netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
4311 struct net_device *dev)
4313 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4314 struct ethhdr *ehdr = (struct ethhdr *)skb->data;
4315 struct ieee80211_key *key;
4316 struct sta_info *sta;
4318 if (unlikely(skb->len < ETH_HLEN)) {
4320 return NETDEV_TX_OK;
4325 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4330 if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded ||
4331 !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
4332 sdata->control_port_protocol == ehdr->h_proto))
4335 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4337 key = rcu_dereference(sdata->default_unicast_key);
4339 if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) ||
4340 key->conf.cipher == WLAN_CIPHER_SUITE_TKIP))
4343 ieee80211_8023_xmit(sdata, dev, sta, key, skb);
4347 ieee80211_subif_start_xmit(skb, dev);
4351 return NETDEV_TX_OK;
4355 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4356 struct sk_buff *skb, u32 info_flags)
4358 struct ieee80211_hdr *hdr;
4359 struct ieee80211_tx_data tx = {
4360 .local = sdata->local,
4363 struct sta_info *sta;
4367 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4369 skb = ERR_PTR(-EINVAL);
4373 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0, NULL);
4377 hdr = (void *)skb->data;
4378 tx.sta = sta_info_get(sdata, hdr->addr1);
4381 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4384 return ERR_PTR(-EINVAL);
4393 * ieee80211_clear_tx_pending may not be called in a context where
4394 * it is possible that it packets could come in again.
4396 void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4398 struct sk_buff *skb;
4401 for (i = 0; i < local->hw.queues; i++) {
4402 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4403 ieee80211_free_txskb(&local->hw, skb);
4408 * Returns false if the frame couldn't be transmitted but was queued instead,
4409 * which in this case means re-queued -- take as an indication to stop sending
4410 * more pending frames.
4412 static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4413 struct sk_buff *skb)
4415 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4416 struct ieee80211_sub_if_data *sdata;
4417 struct sta_info *sta;
4418 struct ieee80211_hdr *hdr;
4420 struct ieee80211_chanctx_conf *chanctx_conf;
4422 sdata = vif_to_sdata(info->control.vif);
4424 if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) {
4425 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4426 if (unlikely(!chanctx_conf)) {
4430 info->band = chanctx_conf->def.chan->band;
4431 result = ieee80211_tx(sdata, NULL, skb, true);
4432 } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
4433 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4438 if (IS_ERR(sta) || (sta && !sta->uploaded))
4441 result = ieee80211_tx_8023(sdata, skb, skb->len, sta, true);
4443 struct sk_buff_head skbs;
4445 __skb_queue_head_init(&skbs);
4446 __skb_queue_tail(&skbs, skb);
4448 hdr = (struct ieee80211_hdr *)skb->data;
4449 sta = sta_info_get(sdata, hdr->addr1);
4451 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
4458 * Transmit all pending packets. Called from tasklet.
4460 void ieee80211_tx_pending(unsigned long data)
4462 struct ieee80211_local *local = (struct ieee80211_local *)data;
4463 unsigned long flags;
4469 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4470 for (i = 0; i < local->hw.queues; i++) {
4472 * If queue is stopped by something other than due to pending
4473 * frames, or we have no pending frames, proceed to next queue.
4475 if (local->queue_stop_reasons[i] ||
4476 skb_queue_empty(&local->pending[i]))
4479 while (!skb_queue_empty(&local->pending[i])) {
4480 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
4481 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4483 if (WARN_ON(!info->control.vif)) {
4484 ieee80211_free_txskb(&local->hw, skb);
4488 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4491 txok = ieee80211_tx_pending_skb(local, skb);
4492 spin_lock_irqsave(&local->queue_stop_reason_lock,
4498 if (skb_queue_empty(&local->pending[i]))
4499 ieee80211_propagate_queue_wake(local, i);
4501 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4506 /* functions for drivers to get certain frames */
4508 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4509 struct ps_data *ps, struct sk_buff *skb,
4514 int i, have_bits = 0, n1, n2;
4516 /* Generate bitmap for TIM only if there are any STAs in power save
4518 if (atomic_read(&ps->num_sta_ps) > 0)
4519 /* in the hope that this is faster than
4520 * checking byte-for-byte */
4521 have_bits = !bitmap_empty((unsigned long *)ps->tim,
4522 IEEE80211_MAX_AID+1);
4524 if (ps->dtim_count == 0)
4525 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
4530 tim = pos = skb_put(skb, 6);
4531 *pos++ = WLAN_EID_TIM;
4533 *pos++ = ps->dtim_count;
4534 *pos++ = sdata->vif.bss_conf.dtim_period;
4536 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
4539 ps->dtim_bc_mc = aid0 == 1;
4542 /* Find largest even number N1 so that bits numbered 1 through
4543 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4544 * (N2 + 1) x 8 through 2007 are 0. */
4546 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4553 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4560 /* Bitmap control */
4562 /* Part Virt Bitmap */
4563 skb_put(skb, n2 - n1);
4564 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
4566 tim[1] = n2 - n1 + 4;
4568 *pos++ = aid0; /* Bitmap control */
4569 *pos++ = 0; /* Part Virt Bitmap */
4573 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4574 struct ps_data *ps, struct sk_buff *skb,
4577 struct ieee80211_local *local = sdata->local;
4580 * Not very nice, but we want to allow the driver to call
4581 * ieee80211_beacon_get() as a response to the set_tim()
4582 * callback. That, however, is already invoked under the
4583 * sta_lock to guarantee consistent and race-free update
4584 * of the tim bitmap in mac80211 and the driver.
4586 if (local->tim_in_locked_section) {
4587 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4589 spin_lock_bh(&local->tim_lock);
4590 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4591 spin_unlock_bh(&local->tim_lock);
4597 static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
4598 struct beacon_data *beacon)
4600 struct probe_resp *resp;
4602 size_t beacon_data_len;
4604 u8 count = beacon->cntdwn_current_counter;
4606 switch (sdata->vif.type) {
4607 case NL80211_IFTYPE_AP:
4608 beacon_data = beacon->tail;
4609 beacon_data_len = beacon->tail_len;
4611 case NL80211_IFTYPE_ADHOC:
4612 beacon_data = beacon->head;
4613 beacon_data_len = beacon->head_len;
4615 case NL80211_IFTYPE_MESH_POINT:
4616 beacon_data = beacon->head;
4617 beacon_data_len = beacon->head_len;
4624 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; ++i) {
4625 resp = rcu_dereference(sdata->u.ap.probe_resp);
4627 if (beacon->cntdwn_counter_offsets[i]) {
4628 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[i] >=
4634 beacon_data[beacon->cntdwn_counter_offsets[i]] = count;
4637 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4638 resp->data[resp->cntdwn_counter_offsets[i]] = count;
4643 static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon)
4645 beacon->cntdwn_current_counter--;
4647 /* the counter should never reach 0 */
4648 WARN_ON_ONCE(!beacon->cntdwn_current_counter);
4650 return beacon->cntdwn_current_counter;
4653 u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif)
4655 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4656 struct beacon_data *beacon = NULL;
4661 if (sdata->vif.type == NL80211_IFTYPE_AP)
4662 beacon = rcu_dereference(sdata->u.ap.beacon);
4663 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4664 beacon = rcu_dereference(sdata->u.ibss.presp);
4665 else if (ieee80211_vif_is_mesh(&sdata->vif))
4666 beacon = rcu_dereference(sdata->u.mesh.beacon);
4671 count = __ieee80211_beacon_update_cntdwn(beacon);
4677 EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
4679 void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
4681 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4682 struct beacon_data *beacon = NULL;
4686 if (sdata->vif.type == NL80211_IFTYPE_AP)
4687 beacon = rcu_dereference(sdata->u.ap.beacon);
4688 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4689 beacon = rcu_dereference(sdata->u.ibss.presp);
4690 else if (ieee80211_vif_is_mesh(&sdata->vif))
4691 beacon = rcu_dereference(sdata->u.mesh.beacon);
4696 if (counter < beacon->cntdwn_current_counter)
4697 beacon->cntdwn_current_counter = counter;
4702 EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
4704 bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif)
4706 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4707 struct beacon_data *beacon = NULL;
4709 size_t beacon_data_len;
4712 if (!ieee80211_sdata_running(sdata))
4716 if (vif->type == NL80211_IFTYPE_AP) {
4717 struct ieee80211_if_ap *ap = &sdata->u.ap;
4719 beacon = rcu_dereference(ap->beacon);
4720 if (WARN_ON(!beacon || !beacon->tail))
4722 beacon_data = beacon->tail;
4723 beacon_data_len = beacon->tail_len;
4724 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4725 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4727 beacon = rcu_dereference(ifibss->presp);
4731 beacon_data = beacon->head;
4732 beacon_data_len = beacon->head_len;
4733 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4734 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4736 beacon = rcu_dereference(ifmsh->beacon);
4740 beacon_data = beacon->head;
4741 beacon_data_len = beacon->head_len;
4747 if (!beacon->cntdwn_counter_offsets[0])
4750 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
4753 if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
4761 EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
4763 static int ieee80211_beacon_protect(struct sk_buff *skb,
4764 struct ieee80211_local *local,
4765 struct ieee80211_sub_if_data *sdata)
4767 ieee80211_tx_result res;
4768 struct ieee80211_tx_data tx;
4769 struct sk_buff *check_skb;
4771 memset(&tx, 0, sizeof(tx));
4772 tx.key = rcu_dereference(sdata->default_beacon_key);
4777 __skb_queue_head_init(&tx.skbs);
4778 __skb_queue_tail(&tx.skbs, skb);
4779 res = ieee80211_tx_h_encrypt(&tx);
4780 check_skb = __skb_dequeue(&tx.skbs);
4781 /* we may crash after this, but it'd be a bug in crypto */
4782 WARN_ON(check_skb != skb);
4783 if (WARN_ON_ONCE(res != TX_CONTINUE))
4789 static struct sk_buff *
4790 __ieee80211_beacon_get(struct ieee80211_hw *hw,
4791 struct ieee80211_vif *vif,
4792 struct ieee80211_mutable_offsets *offs,
4795 struct ieee80211_local *local = hw_to_local(hw);
4796 struct beacon_data *beacon = NULL;
4797 struct sk_buff *skb = NULL;
4798 struct ieee80211_tx_info *info;
4799 struct ieee80211_sub_if_data *sdata = NULL;
4800 enum nl80211_band band;
4801 struct ieee80211_tx_rate_control txrc;
4802 struct ieee80211_chanctx_conf *chanctx_conf;
4803 int csa_off_base = 0;
4807 sdata = vif_to_sdata(vif);
4808 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4810 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
4814 memset(offs, 0, sizeof(*offs));
4816 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4817 struct ieee80211_if_ap *ap = &sdata->u.ap;
4819 beacon = rcu_dereference(ap->beacon);
4821 if (beacon->cntdwn_counter_offsets[0]) {
4823 ieee80211_beacon_update_cntdwn(vif);
4825 ieee80211_set_beacon_cntdwn(sdata, beacon);
4829 * headroom, head length,
4830 * tail length and maximum TIM length
4832 skb = dev_alloc_skb(local->tx_headroom +
4834 beacon->tail_len + 256 +
4835 local->hw.extra_beacon_tailroom);
4839 skb_reserve(skb, local->tx_headroom);
4840 skb_put_data(skb, beacon->head, beacon->head_len);
4842 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4846 offs->tim_offset = beacon->head_len;
4847 offs->tim_length = skb->len - beacon->head_len;
4849 /* for AP the csa offsets are from tail */
4850 csa_off_base = skb->len;
4854 skb_put_data(skb, beacon->tail,
4857 if (ieee80211_beacon_protect(skb, local, sdata) < 0)
4861 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
4862 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4863 struct ieee80211_hdr *hdr;
4865 beacon = rcu_dereference(ifibss->presp);
4869 if (beacon->cntdwn_counter_offsets[0]) {
4871 __ieee80211_beacon_update_cntdwn(beacon);
4873 ieee80211_set_beacon_cntdwn(sdata, beacon);
4876 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
4877 local->hw.extra_beacon_tailroom);
4880 skb_reserve(skb, local->tx_headroom);
4881 skb_put_data(skb, beacon->head, beacon->head_len);
4883 hdr = (struct ieee80211_hdr *) skb->data;
4884 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4885 IEEE80211_STYPE_BEACON);
4886 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4887 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4889 beacon = rcu_dereference(ifmsh->beacon);
4893 if (beacon->cntdwn_counter_offsets[0]) {
4895 /* TODO: For mesh csa_counter is in TU, so
4896 * decrementing it by one isn't correct, but
4897 * for now we leave it consistent with overall
4898 * mac80211's behavior.
4900 __ieee80211_beacon_update_cntdwn(beacon);
4902 ieee80211_set_beacon_cntdwn(sdata, beacon);
4905 if (ifmsh->sync_ops)
4906 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
4908 skb = dev_alloc_skb(local->tx_headroom +
4912 local->hw.extra_beacon_tailroom);
4915 skb_reserve(skb, local->tx_headroom);
4916 skb_put_data(skb, beacon->head, beacon->head_len);
4917 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4920 offs->tim_offset = beacon->head_len;
4921 offs->tim_length = skb->len - beacon->head_len;
4924 skb_put_data(skb, beacon->tail, beacon->tail_len);
4931 if (offs && beacon) {
4934 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
4935 u16 csa_off = beacon->cntdwn_counter_offsets[i];
4940 offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
4944 band = chanctx_conf->def.chan->band;
4946 info = IEEE80211_SKB_CB(skb);
4948 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
4949 info->flags |= IEEE80211_TX_CTL_NO_ACK;
4952 memset(&txrc, 0, sizeof(txrc));
4954 txrc.sband = local->hw.wiphy->bands[band];
4955 txrc.bss_conf = &sdata->vif.bss_conf;
4957 txrc.reported_rate.idx = -1;
4958 if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band])
4959 txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band];
4961 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
4963 rate_control_get_rate(sdata, NULL, &txrc);
4965 info->control.vif = vif;
4967 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4968 IEEE80211_TX_CTL_ASSIGN_SEQ |
4969 IEEE80211_TX_CTL_FIRST_FRAGMENT;
4977 ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4978 struct ieee80211_vif *vif,
4979 struct ieee80211_mutable_offsets *offs)
4981 return __ieee80211_beacon_get(hw, vif, offs, true);
4983 EXPORT_SYMBOL(ieee80211_beacon_get_template);
4985 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4986 struct ieee80211_vif *vif,
4987 u16 *tim_offset, u16 *tim_length)
4989 struct ieee80211_mutable_offsets offs = {};
4990 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
4991 struct sk_buff *copy;
4992 struct ieee80211_supported_band *sband;
4999 *tim_offset = offs.tim_offset;
5002 *tim_length = offs.tim_length;
5004 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
5005 !hw_to_local(hw)->monitors)
5008 /* send a copy to monitor interfaces */
5009 copy = skb_copy(bcn, GFP_ATOMIC);
5013 shift = ieee80211_vif_get_shift(vif);
5014 sband = ieee80211_get_sband(vif_to_sdata(vif));
5018 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false,
5023 EXPORT_SYMBOL(ieee80211_beacon_get_tim);
5025 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
5026 struct ieee80211_vif *vif)
5028 struct ieee80211_if_ap *ap = NULL;
5029 struct sk_buff *skb = NULL;
5030 struct probe_resp *presp = NULL;
5031 struct ieee80211_hdr *hdr;
5032 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5034 if (sdata->vif.type != NL80211_IFTYPE_AP)
5040 presp = rcu_dereference(ap->probe_resp);
5044 skb = dev_alloc_skb(presp->len);
5048 skb_put_data(skb, presp->data, presp->len);
5050 hdr = (struct ieee80211_hdr *) skb->data;
5051 memset(hdr->addr1, 0, sizeof(hdr->addr1));
5057 EXPORT_SYMBOL(ieee80211_proberesp_get);
5059 struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
5060 struct ieee80211_vif *vif)
5062 struct sk_buff *skb = NULL;
5063 struct fils_discovery_data *tmpl = NULL;
5064 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5066 if (sdata->vif.type != NL80211_IFTYPE_AP)
5070 tmpl = rcu_dereference(sdata->u.ap.fils_discovery);
5076 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5078 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5079 skb_put_data(skb, tmpl->data, tmpl->len);
5085 EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
5088 ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
5089 struct ieee80211_vif *vif)
5091 struct sk_buff *skb = NULL;
5092 struct unsol_bcast_probe_resp_data *tmpl = NULL;
5093 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5095 if (sdata->vif.type != NL80211_IFTYPE_AP)
5099 tmpl = rcu_dereference(sdata->u.ap.unsol_bcast_probe_resp);
5105 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5107 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5108 skb_put_data(skb, tmpl->data, tmpl->len);
5114 EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl);
5116 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
5117 struct ieee80211_vif *vif)
5119 struct ieee80211_sub_if_data *sdata;
5120 struct ieee80211_if_managed *ifmgd;
5121 struct ieee80211_pspoll *pspoll;
5122 struct ieee80211_local *local;
5123 struct sk_buff *skb;
5125 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5128 sdata = vif_to_sdata(vif);
5129 ifmgd = &sdata->u.mgd;
5130 local = sdata->local;
5132 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
5136 skb_reserve(skb, local->hw.extra_tx_headroom);
5138 pspoll = skb_put_zero(skb, sizeof(*pspoll));
5139 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
5140 IEEE80211_STYPE_PSPOLL);
5141 pspoll->aid = cpu_to_le16(sdata->vif.bss_conf.aid);
5143 /* aid in PS-Poll has its two MSBs each set to 1 */
5144 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
5146 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
5147 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
5151 EXPORT_SYMBOL(ieee80211_pspoll_get);
5153 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
5154 struct ieee80211_vif *vif,
5157 struct ieee80211_hdr_3addr *nullfunc;
5158 struct ieee80211_sub_if_data *sdata;
5159 struct ieee80211_if_managed *ifmgd;
5160 struct ieee80211_local *local;
5161 struct sk_buff *skb;
5164 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5167 sdata = vif_to_sdata(vif);
5168 ifmgd = &sdata->u.mgd;
5169 local = sdata->local;
5172 struct sta_info *sta;
5175 sta = sta_info_get(sdata, ifmgd->bssid);
5176 qos = sta && sta->sta.wme;
5180 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5181 sizeof(*nullfunc) + 2);
5185 skb_reserve(skb, local->hw.extra_tx_headroom);
5187 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
5188 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
5189 IEEE80211_STYPE_NULLFUNC |
5190 IEEE80211_FCTL_TODS);
5192 __le16 qoshdr = cpu_to_le16(7);
5194 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
5195 IEEE80211_STYPE_NULLFUNC) !=
5196 IEEE80211_STYPE_QOS_NULLFUNC);
5197 nullfunc->frame_control |=
5198 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
5200 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
5201 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
5204 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
5205 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
5206 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
5210 EXPORT_SYMBOL(ieee80211_nullfunc_get);
5212 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
5214 const u8 *ssid, size_t ssid_len,
5217 struct ieee80211_local *local = hw_to_local(hw);
5218 struct ieee80211_hdr_3addr *hdr;
5219 struct sk_buff *skb;
5223 ie_ssid_len = 2 + ssid_len;
5225 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
5226 ie_ssid_len + tailroom);
5230 skb_reserve(skb, local->hw.extra_tx_headroom);
5232 hdr = skb_put_zero(skb, sizeof(*hdr));
5233 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5234 IEEE80211_STYPE_PROBE_REQ);
5235 eth_broadcast_addr(hdr->addr1);
5236 memcpy(hdr->addr2, src_addr, ETH_ALEN);
5237 eth_broadcast_addr(hdr->addr3);
5239 pos = skb_put(skb, ie_ssid_len);
5240 *pos++ = WLAN_EID_SSID;
5243 memcpy(pos, ssid, ssid_len);
5248 EXPORT_SYMBOL(ieee80211_probereq_get);
5250 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5251 const void *frame, size_t frame_len,
5252 const struct ieee80211_tx_info *frame_txctl,
5253 struct ieee80211_rts *rts)
5255 const struct ieee80211_hdr *hdr = frame;
5257 rts->frame_control =
5258 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
5259 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
5261 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
5262 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
5264 EXPORT_SYMBOL(ieee80211_rts_get);
5266 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5267 const void *frame, size_t frame_len,
5268 const struct ieee80211_tx_info *frame_txctl,
5269 struct ieee80211_cts *cts)
5271 const struct ieee80211_hdr *hdr = frame;
5273 cts->frame_control =
5274 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
5275 cts->duration = ieee80211_ctstoself_duration(hw, vif,
5276 frame_len, frame_txctl);
5277 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
5279 EXPORT_SYMBOL(ieee80211_ctstoself_get);
5282 ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
5283 struct ieee80211_vif *vif)
5285 struct ieee80211_local *local = hw_to_local(hw);
5286 struct sk_buff *skb = NULL;
5287 struct ieee80211_tx_data tx;
5288 struct ieee80211_sub_if_data *sdata;
5290 struct ieee80211_tx_info *info;
5291 struct ieee80211_chanctx_conf *chanctx_conf;
5293 sdata = vif_to_sdata(vif);
5296 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5301 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5302 struct beacon_data *beacon =
5303 rcu_dereference(sdata->u.ap.beacon);
5305 if (!beacon || !beacon->head)
5308 ps = &sdata->u.ap.ps;
5309 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5310 ps = &sdata->u.mesh.ps;
5315 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
5316 goto out; /* send buffered bc/mc only after DTIM beacon */
5319 skb = skb_dequeue(&ps->bc_buf);
5322 local->total_ps_buffered--;
5324 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
5325 struct ieee80211_hdr *hdr =
5326 (struct ieee80211_hdr *) skb->data;
5327 /* more buffered multicast/broadcast frames ==> set
5328 * MoreData flag in IEEE 802.11 header to inform PS
5330 hdr->frame_control |=
5331 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5334 if (sdata->vif.type == NL80211_IFTYPE_AP)
5335 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
5336 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
5338 ieee80211_free_txskb(hw, skb);
5341 info = IEEE80211_SKB_CB(skb);
5343 tx.flags |= IEEE80211_TX_PS_BUFFERED;
5344 info->band = chanctx_conf->def.chan->band;
5346 if (invoke_tx_handlers(&tx))
5353 EXPORT_SYMBOL(ieee80211_get_buffered_bc);
5355 int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5357 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5358 struct ieee80211_sub_if_data *sdata = sta->sdata;
5359 struct ieee80211_local *local = sdata->local;
5363 lockdep_assert_held(&local->sta_mtx);
5365 /* only some cases are supported right now */
5366 switch (sdata->vif.type) {
5367 case NL80211_IFTYPE_STATION:
5368 case NL80211_IFTYPE_AP:
5369 case NL80211_IFTYPE_AP_VLAN:
5376 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5379 if (sta->reserved_tid == tid) {
5384 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5385 sdata_err(sdata, "TID reservation already active\n");
5390 ieee80211_stop_vif_queues(sdata->local, sdata,
5391 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5395 /* Tear down BA sessions so we stop aggregating on this TID */
5396 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
5397 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
5398 __ieee80211_stop_tx_ba_session(sta, tid,
5399 AGG_STOP_LOCAL_REQUEST);
5402 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
5403 __ieee80211_flush_queues(local, sdata, queues, false);
5405 sta->reserved_tid = tid;
5407 ieee80211_wake_vif_queues(local, sdata,
5408 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5410 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
5411 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
5417 EXPORT_SYMBOL(ieee80211_reserve_tid);
5419 void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5421 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5422 struct ieee80211_sub_if_data *sdata = sta->sdata;
5424 lockdep_assert_held(&sdata->local->sta_mtx);
5426 /* only some cases are supported right now */
5427 switch (sdata->vif.type) {
5428 case NL80211_IFTYPE_STATION:
5429 case NL80211_IFTYPE_AP:
5430 case NL80211_IFTYPE_AP_VLAN:
5437 if (tid != sta->reserved_tid) {
5438 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
5442 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
5444 EXPORT_SYMBOL(ieee80211_unreserve_tid);
5446 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
5447 struct sk_buff *skb, int tid,
5448 enum nl80211_band band)
5450 int ac = ieee80211_ac_from_tid(tid);
5452 skb_reset_mac_header(skb);
5453 skb_set_queue_mapping(skb, ac);
5454 skb->priority = tid;
5456 skb->dev = sdata->dev;
5459 * The other path calling ieee80211_xmit is from the tasklet,
5460 * and while we can handle concurrent transmissions locking
5461 * requirements are that we do not come into tx with bhs on.
5464 IEEE80211_SKB_CB(skb)->band = band;
5465 ieee80211_xmit(sdata, NULL, skb);
5469 int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
5470 const u8 *buf, size_t len,
5471 const u8 *dest, __be16 proto, bool unencrypted,
5474 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5475 struct ieee80211_local *local = sdata->local;
5476 struct sk_buff *skb;
5477 struct ethhdr *ehdr;
5481 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
5482 * or Pre-Authentication
5484 if (proto != sdata->control_port_protocol &&
5485 proto != cpu_to_be16(ETH_P_PREAUTH))
5488 if (proto == sdata->control_port_protocol)
5489 ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
5490 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
5493 flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5496 ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
5498 flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
5499 IEEE80211_TX_CTL_INJECTED;
5501 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5502 sizeof(struct ethhdr) + len);
5506 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
5508 skb_put_data(skb, buf, len);
5510 ehdr = skb_push(skb, sizeof(struct ethhdr));
5511 memcpy(ehdr->h_dest, dest, ETH_ALEN);
5512 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
5513 ehdr->h_proto = proto;
5516 skb->protocol = htons(ETH_P_802_3);
5517 skb_reset_network_header(skb);
5518 skb_reset_mac_header(skb);
5520 /* mutex lock is only needed for incrementing the cookie counter */
5521 mutex_lock(&local->mtx);
5524 __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags, cookie);
5527 mutex_unlock(&local->mtx);
5532 int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
5533 const u8 *buf, size_t len)
5535 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5536 struct ieee80211_local *local = sdata->local;
5537 struct sk_buff *skb;
5539 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
5540 30 + /* header size */
5541 18); /* 11s header size */
5545 skb_reserve(skb, local->hw.extra_tx_headroom);
5546 skb_put_data(skb, buf, len);
5549 skb->protocol = htons(ETH_P_802_3);
5550 skb_reset_network_header(skb);
5551 skb_reset_mac_header(skb);
5554 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
5555 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP,