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;
86 * data and mgmt (except PS Poll):
88 * - during contention period:
89 * if addr1 is group address: 0
90 * if more fragments = 0 and addr1 is individual address: time to
91 * transmit one ACK plus SIFS
92 * if more fragments = 1 and addr1 is individual address: time to
93 * transmit next fragment plus 2 x ACK plus 3 x SIFS
96 * - control response frame (CTS or ACK) shall be transmitted using the
97 * same rate as the immediately previous frame in the frame exchange
98 * sequence, if this rate belongs to the PHY mandatory rates, or else
99 * at the highest possible rate belonging to the PHY rates in the
102 hdr = (struct ieee80211_hdr *)skb->data;
103 if (ieee80211_is_ctl(hdr->frame_control)) {
104 /* TODO: These control frames are not currently sent by
105 * mac80211, but should they be implemented, this function
106 * needs to be updated to support duration field calculation.
108 * RTS: time needed to transmit pending data/mgmt frame plus
109 * one CTS frame plus one ACK frame plus 3 x SIFS
110 * CTS: duration of immediately previous RTS minus time
111 * required to transmit CTS and its SIFS
112 * ACK: 0 if immediately previous directed data/mgmt had
113 * more=0, with more=1 duration in ACK frame is duration
114 * from previous frame minus time needed to transmit ACK
116 * PS Poll: BIT(15) | BIT(14) | aid
122 if (0 /* FIX: data/mgmt during CFP */)
123 return cpu_to_le16(32768);
125 if (group_addr) /* Group address as the destination - no ACK */
128 /* Individual destination address:
129 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
130 * CTS and ACK frames shall be transmitted using the highest rate in
131 * basic rate set that is less than or equal to the rate of the
132 * immediately previous frame and that is using the same modulation
133 * (CCK or OFDM). If no basic rate set matches with these requirements,
134 * the highest mandatory rate of the PHY that is less than or equal to
135 * the rate of the previous frame is used.
136 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
139 /* use lowest available if everything fails */
140 mrate = sband->bitrates[0].bitrate;
141 for (i = 0; i < sband->n_bitrates; i++) {
142 struct ieee80211_rate *r = &sband->bitrates[i];
144 if (r->bitrate > txrate->bitrate)
147 if ((rate_flags & r->flags) != rate_flags)
150 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
151 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
153 switch (sband->band) {
154 case NL80211_BAND_2GHZ: {
156 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
157 flag = IEEE80211_RATE_MANDATORY_G;
159 flag = IEEE80211_RATE_MANDATORY_B;
164 case NL80211_BAND_5GHZ:
165 case NL80211_BAND_6GHZ:
166 if (r->flags & IEEE80211_RATE_MANDATORY_A)
169 case NL80211_BAND_60GHZ:
170 /* TODO, for now fall through */
171 case NUM_NL80211_BANDS:
177 /* No matching basic rate found; use highest suitable mandatory
179 rate = DIV_ROUND_UP(mrate, 1 << shift);
182 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
183 if (ieee80211_is_data_qos(hdr->frame_control) &&
184 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
187 /* Time needed to transmit ACK
188 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
189 * to closest integer */
190 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
191 tx->sdata->vif.bss_conf.use_short_preamble,
195 /* Frame is fragmented: duration increases with time needed to
196 * transmit next fragment plus ACK and 2 x SIFS. */
197 dur *= 2; /* ACK + SIFS */
199 dur += ieee80211_frame_duration(sband->band, next_frag_len,
200 txrate->bitrate, erp,
201 tx->sdata->vif.bss_conf.use_short_preamble,
205 return cpu_to_le16(dur);
209 static ieee80211_tx_result debug_noinline
210 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
212 struct ieee80211_local *local = tx->local;
213 struct ieee80211_if_managed *ifmgd;
214 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
216 /* driver doesn't support power save */
217 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
220 /* hardware does dynamic power save */
221 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
224 /* dynamic power save disabled */
225 if (local->hw.conf.dynamic_ps_timeout <= 0)
228 /* we are scanning, don't enable power save */
232 if (!local->ps_sdata)
235 /* No point if we're going to suspend */
236 if (local->quiescing)
239 /* dynamic ps is supported only in managed mode */
240 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
243 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
246 ifmgd = &tx->sdata->u.mgd;
249 * Don't wakeup from power save if u-apsd is enabled, voip ac has
250 * u-apsd enabled and the frame is in voip class. This effectively
251 * means that even if all access categories have u-apsd enabled, in
252 * practise u-apsd is only used with the voip ac. This is a
253 * workaround for the case when received voip class packets do not
254 * have correct qos tag for some reason, due the network or the
257 * Note: ifmgd->uapsd_queues access is racy here. If the value is
258 * changed via debugfs, user needs to reassociate manually to have
259 * everything in sync.
261 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
262 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
263 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
266 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
267 ieee80211_stop_queues_by_reason(&local->hw,
268 IEEE80211_MAX_QUEUE_MAP,
269 IEEE80211_QUEUE_STOP_REASON_PS,
271 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
272 ieee80211_queue_work(&local->hw,
273 &local->dynamic_ps_disable_work);
276 /* Don't restart the timer if we're not disassociated */
277 if (!ifmgd->associated)
280 mod_timer(&local->dynamic_ps_timer, jiffies +
281 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
286 static ieee80211_tx_result debug_noinline
287 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
290 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
291 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
294 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
297 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
298 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
299 !ieee80211_is_probe_req(hdr->frame_control) &&
300 !ieee80211_is_any_nullfunc(hdr->frame_control))
302 * When software scanning only nullfunc frames (to notify
303 * the sleep state to the AP) and probe requests (for the
304 * active scan) are allowed, all other frames should not be
305 * sent and we should not get here, but if we do
306 * nonetheless, drop them to avoid sending them
307 * off-channel. See the link below and
308 * ieee80211_start_scan() for more.
310 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
314 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
317 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
320 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
324 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
326 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
327 if (unlikely(!assoc &&
328 ieee80211_is_data(hdr->frame_control))) {
329 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
330 sdata_info(tx->sdata,
331 "dropped data frame to not associated station %pM\n",
334 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
337 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
338 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
340 * No associated STAs - no need to send multicast
349 /* This function is called whenever the AP is about to exceed the maximum limit
350 * of buffered frames for power saving STAs. This situation should not really
351 * happen often during normal operation, so dropping the oldest buffered packet
352 * from each queue should be OK to make some room for new frames. */
353 static void purge_old_ps_buffers(struct ieee80211_local *local)
355 int total = 0, purged = 0;
357 struct ieee80211_sub_if_data *sdata;
358 struct sta_info *sta;
360 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
363 if (sdata->vif.type == NL80211_IFTYPE_AP)
364 ps = &sdata->u.ap.ps;
365 else if (ieee80211_vif_is_mesh(&sdata->vif))
366 ps = &sdata->u.mesh.ps;
370 skb = skb_dequeue(&ps->bc_buf);
373 ieee80211_free_txskb(&local->hw, skb);
375 total += skb_queue_len(&ps->bc_buf);
379 * Drop one frame from each station from the lowest-priority
380 * AC that has frames at all.
382 list_for_each_entry_rcu(sta, &local->sta_list, list) {
385 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
386 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
387 total += skb_queue_len(&sta->ps_tx_buf[ac]);
390 ieee80211_free_txskb(&local->hw, skb);
396 local->total_ps_buffered = total;
397 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
400 static ieee80211_tx_result
401 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
403 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
404 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
408 * broadcast/multicast frame
410 * If any of the associated/peer stations is in power save mode,
411 * the frame is buffered to be sent after DTIM beacon frame.
412 * This is done either by the hardware or us.
415 /* powersaving STAs currently only in AP/VLAN/mesh mode */
416 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
417 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
421 ps = &tx->sdata->bss->ps;
422 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
423 ps = &tx->sdata->u.mesh.ps;
429 /* no buffering for ordered frames */
430 if (ieee80211_has_order(hdr->frame_control))
433 if (ieee80211_is_probe_req(hdr->frame_control))
436 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
437 info->hw_queue = tx->sdata->vif.cab_queue;
439 /* no stations in PS mode and no buffered packets */
440 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
443 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
445 /* device releases frame after DTIM beacon */
446 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
449 /* buffered in mac80211 */
450 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
451 purge_old_ps_buffers(tx->local);
453 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
455 "BC TX buffer full - dropping the oldest frame\n");
456 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
458 tx->local->total_ps_buffered++;
460 skb_queue_tail(&ps->bc_buf, tx->skb);
465 static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
468 if (!ieee80211_is_mgmt(fc))
471 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
474 if (!ieee80211_is_robust_mgmt_frame(skb))
480 static ieee80211_tx_result
481 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
483 struct sta_info *sta = tx->sta;
484 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
485 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
486 struct ieee80211_local *local = tx->local;
491 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
492 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
493 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
494 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
495 int ac = skb_get_queue_mapping(tx->skb);
497 if (ieee80211_is_mgmt(hdr->frame_control) &&
498 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
499 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
503 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
504 sta->sta.addr, sta->sta.aid, ac);
505 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
506 purge_old_ps_buffers(tx->local);
508 /* sync with ieee80211_sta_ps_deliver_wakeup */
509 spin_lock(&sta->ps_lock);
511 * STA woke up the meantime and all the frames on ps_tx_buf have
512 * been queued to pending queue. No reordering can happen, go
513 * ahead and Tx the packet.
515 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
516 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
517 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
518 spin_unlock(&sta->ps_lock);
522 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
523 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
525 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
527 ieee80211_free_txskb(&local->hw, old);
529 tx->local->total_ps_buffered++;
531 info->control.jiffies = jiffies;
532 info->control.vif = &tx->sdata->vif;
533 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
534 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
535 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
536 spin_unlock(&sta->ps_lock);
538 if (!timer_pending(&local->sta_cleanup))
539 mod_timer(&local->sta_cleanup,
540 round_jiffies(jiffies +
541 STA_INFO_CLEANUP_INTERVAL));
544 * We queued up some frames, so the TIM bit might
545 * need to be set, recalculate it.
547 sta_info_recalc_tim(sta);
550 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
552 "STA %pM in PS mode, but polling/in SP -> send frame\n",
559 static ieee80211_tx_result debug_noinline
560 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
562 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
565 if (tx->flags & IEEE80211_TX_UNICAST)
566 return ieee80211_tx_h_unicast_ps_buf(tx);
568 return ieee80211_tx_h_multicast_ps_buf(tx);
571 static ieee80211_tx_result debug_noinline
572 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
574 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
576 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
577 if (tx->sdata->control_port_no_encrypt)
578 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
579 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
580 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
586 static ieee80211_tx_result debug_noinline
587 ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
589 struct ieee80211_key *key;
590 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
591 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
593 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
599 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
601 else if (ieee80211_is_group_privacy_action(tx->skb) &&
602 (key = rcu_dereference(tx->sdata->default_multicast_key)))
604 else if (ieee80211_is_mgmt(hdr->frame_control) &&
605 is_multicast_ether_addr(hdr->addr1) &&
606 ieee80211_is_robust_mgmt_frame(tx->skb) &&
607 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
609 else if (is_multicast_ether_addr(hdr->addr1) &&
610 (key = rcu_dereference(tx->sdata->default_multicast_key)))
612 else if (!is_multicast_ether_addr(hdr->addr1) &&
613 (key = rcu_dereference(tx->sdata->default_unicast_key)))
619 bool skip_hw = false;
621 /* TODO: add threshold stuff again */
623 switch (tx->key->conf.cipher) {
624 case WLAN_CIPHER_SUITE_WEP40:
625 case WLAN_CIPHER_SUITE_WEP104:
626 case WLAN_CIPHER_SUITE_TKIP:
627 if (!ieee80211_is_data_present(hdr->frame_control))
630 case WLAN_CIPHER_SUITE_CCMP:
631 case WLAN_CIPHER_SUITE_CCMP_256:
632 case WLAN_CIPHER_SUITE_GCMP:
633 case WLAN_CIPHER_SUITE_GCMP_256:
634 if (!ieee80211_is_data_present(hdr->frame_control) &&
635 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
637 !ieee80211_is_group_privacy_action(tx->skb))
640 skip_hw = (tx->key->conf.flags &
641 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
642 ieee80211_is_mgmt(hdr->frame_control);
644 case WLAN_CIPHER_SUITE_AES_CMAC:
645 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
646 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
647 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
648 if (!ieee80211_is_mgmt(hdr->frame_control))
653 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
654 !ieee80211_is_deauth(hdr->frame_control)))
657 if (!skip_hw && tx->key &&
658 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
659 info->control.hw_key = &tx->key->conf;
660 } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta &&
661 test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) {
668 static ieee80211_tx_result debug_noinline
669 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
671 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
672 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
673 struct ieee80211_supported_band *sband;
675 struct ieee80211_tx_rate_control txrc;
676 struct ieee80211_sta_rates *ratetbl = NULL;
679 memset(&txrc, 0, sizeof(txrc));
681 sband = tx->local->hw.wiphy->bands[info->band];
683 len = min_t(u32, tx->skb->len + FCS_LEN,
684 tx->local->hw.wiphy->frag_threshold);
686 /* set up the tx rate control struct we give the RC algo */
687 txrc.hw = &tx->local->hw;
689 txrc.bss_conf = &tx->sdata->vif.bss_conf;
691 txrc.reported_rate.idx = -1;
692 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
694 if (tx->sdata->rc_has_mcs_mask[info->band])
695 txrc.rate_idx_mcs_mask =
696 tx->sdata->rc_rateidx_mcs_mask[info->band];
698 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
699 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
700 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
701 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
703 /* set up RTS protection if desired */
704 if (len > tx->local->hw.wiphy->rts_threshold) {
708 info->control.use_rts = txrc.rts;
709 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
712 * Use short preamble if the BSS can handle it, but not for
713 * management frames unless we know the receiver can handle
714 * that -- the management frame might be to a station that
715 * just wants a probe response.
717 if (tx->sdata->vif.bss_conf.use_short_preamble &&
718 (ieee80211_is_data(hdr->frame_control) ||
719 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
720 txrc.short_preamble = true;
722 info->control.short_preamble = txrc.short_preamble;
724 /* don't ask rate control when rate already injected via radiotap */
725 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
729 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
732 * Lets not bother rate control if we're associated and cannot
733 * talk to the sta. This should not happen.
735 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
736 !rate_usable_index_exists(sband, &tx->sta->sta),
737 "%s: Dropped data frame as no usable bitrate found while "
738 "scanning and associated. Target station: "
739 "%pM on %d GHz band\n",
740 tx->sdata->name, hdr->addr1,
745 * If we're associated with the sta at this point we know we can at
746 * least send the frame at the lowest bit rate.
748 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
750 if (tx->sta && !info->control.skip_table)
751 ratetbl = rcu_dereference(tx->sta->sta.rates);
753 if (unlikely(info->control.rates[0].idx < 0)) {
755 struct ieee80211_tx_rate rate = {
756 .idx = ratetbl->rate[0].idx,
757 .flags = ratetbl->rate[0].flags,
758 .count = ratetbl->rate[0].count
761 if (ratetbl->rate[0].idx < 0)
769 tx->rate = info->control.rates[0];
772 if (txrc.reported_rate.idx < 0) {
773 txrc.reported_rate = tx->rate;
774 if (tx->sta && ieee80211_is_data(hdr->frame_control))
775 tx->sta->tx_stats.last_rate = txrc.reported_rate;
777 tx->sta->tx_stats.last_rate = txrc.reported_rate;
782 if (unlikely(!info->control.rates[0].count))
783 info->control.rates[0].count = 1;
785 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
786 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
787 info->control.rates[0].count = 1;
792 static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
794 u16 *seq = &sta->tid_seq[tid];
795 __le16 ret = cpu_to_le16(*seq);
797 /* Increase the sequence number. */
798 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
803 static ieee80211_tx_result debug_noinline
804 ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
806 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
807 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
811 * Packet injection may want to control the sequence
812 * number, if we have no matching interface then we
813 * neither assign one ourselves nor ask the driver to.
815 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
818 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
821 if (ieee80211_hdrlen(hdr->frame_control) < 24)
824 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
828 * Anything but QoS data that has a sequence number field
829 * (is long enough) gets a sequence number from the global
830 * counter. QoS data frames with a multicast destination
831 * also use the global counter (802.11-2012 9.3.2.10).
833 if (!ieee80211_is_data_qos(hdr->frame_control) ||
834 is_multicast_ether_addr(hdr->addr1)) {
835 if (tx->flags & IEEE80211_TX_NO_SEQNO)
837 /* driver should assign sequence number */
838 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
839 /* for pure STA mode without beacons, we can do it */
840 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
841 tx->sdata->sequence_number += 0x10;
843 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
848 * This should be true for injected/management frames only, for
849 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
850 * above since they are not QoS-data frames.
855 /* include per-STA, per-TID sequence counter */
856 tid = ieee80211_get_tid(hdr);
857 tx->sta->tx_stats.msdu[tid]++;
859 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
864 static int ieee80211_fragment(struct ieee80211_tx_data *tx,
865 struct sk_buff *skb, int hdrlen,
868 struct ieee80211_local *local = tx->local;
869 struct ieee80211_tx_info *info;
871 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
872 int pos = hdrlen + per_fragm;
873 int rem = skb->len - hdrlen - per_fragm;
875 if (WARN_ON(rem < 0))
878 /* first fragment was already added to queue by caller */
881 int fraglen = per_fragm;
886 tmp = dev_alloc_skb(local->tx_headroom +
888 tx->sdata->encrypt_headroom +
889 IEEE80211_ENCRYPT_TAILROOM);
893 __skb_queue_tail(&tx->skbs, tmp);
896 local->tx_headroom + tx->sdata->encrypt_headroom);
898 /* copy control information */
899 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
901 info = IEEE80211_SKB_CB(tmp);
902 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
903 IEEE80211_TX_CTL_FIRST_FRAGMENT);
906 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
908 skb_copy_queue_mapping(tmp, skb);
909 tmp->priority = skb->priority;
912 /* copy header and data */
913 skb_put_data(tmp, skb->data, hdrlen);
914 skb_put_data(tmp, skb->data + pos, fraglen);
919 /* adjust first fragment's length */
920 skb_trim(skb, hdrlen + per_fragm);
924 static ieee80211_tx_result debug_noinline
925 ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
927 struct sk_buff *skb = tx->skb;
928 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
929 struct ieee80211_hdr *hdr = (void *)skb->data;
930 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
934 /* no matter what happens, tx->skb moves to tx->skbs */
935 __skb_queue_tail(&tx->skbs, skb);
938 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
941 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
945 * Warn when submitting a fragmented A-MPDU frame and drop it.
946 * This scenario is handled in ieee80211_tx_prepare but extra
947 * caution taken here as fragmented ampdu may cause Tx stop.
949 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
952 hdrlen = ieee80211_hdrlen(hdr->frame_control);
954 /* internal error, why isn't DONTFRAG set? */
955 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
959 * Now fragment the frame. This will allocate all the fragments and
960 * chain them (using skb as the first fragment) to skb->next.
961 * During transmission, we will remove the successfully transmitted
962 * fragments from this list. When the low-level driver rejects one
963 * of the fragments then we will simply pretend to accept the skb
964 * but store it away as pending.
966 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
969 /* update duration/seq/flags of fragments */
972 skb_queue_walk(&tx->skbs, skb) {
973 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
975 hdr = (void *)skb->data;
976 info = IEEE80211_SKB_CB(skb);
978 if (!skb_queue_is_last(&tx->skbs, skb)) {
979 hdr->frame_control |= morefrags;
981 * No multi-rate retries for fragmented frames, that
982 * would completely throw off the NAV at other STAs.
984 info->control.rates[1].idx = -1;
985 info->control.rates[2].idx = -1;
986 info->control.rates[3].idx = -1;
987 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
988 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
990 hdr->frame_control &= ~morefrags;
992 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
999 static ieee80211_tx_result debug_noinline
1000 ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1002 struct sk_buff *skb;
1008 skb_queue_walk(&tx->skbs, skb) {
1009 ac = skb_get_queue_mapping(skb);
1010 tx->sta->tx_stats.bytes[ac] += skb->len;
1013 tx->sta->tx_stats.packets[ac]++;
1018 static ieee80211_tx_result debug_noinline
1019 ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1024 switch (tx->key->conf.cipher) {
1025 case WLAN_CIPHER_SUITE_WEP40:
1026 case WLAN_CIPHER_SUITE_WEP104:
1027 return ieee80211_crypto_wep_encrypt(tx);
1028 case WLAN_CIPHER_SUITE_TKIP:
1029 return ieee80211_crypto_tkip_encrypt(tx);
1030 case WLAN_CIPHER_SUITE_CCMP:
1031 return ieee80211_crypto_ccmp_encrypt(
1032 tx, IEEE80211_CCMP_MIC_LEN);
1033 case WLAN_CIPHER_SUITE_CCMP_256:
1034 return ieee80211_crypto_ccmp_encrypt(
1035 tx, IEEE80211_CCMP_256_MIC_LEN);
1036 case WLAN_CIPHER_SUITE_AES_CMAC:
1037 return ieee80211_crypto_aes_cmac_encrypt(tx);
1038 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1039 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
1040 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1041 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1042 return ieee80211_crypto_aes_gmac_encrypt(tx);
1043 case WLAN_CIPHER_SUITE_GCMP:
1044 case WLAN_CIPHER_SUITE_GCMP_256:
1045 return ieee80211_crypto_gcmp_encrypt(tx);
1047 return ieee80211_crypto_hw_encrypt(tx);
1053 static ieee80211_tx_result debug_noinline
1054 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1056 struct sk_buff *skb;
1057 struct ieee80211_hdr *hdr;
1061 skb_queue_walk(&tx->skbs, skb) {
1062 hdr = (void *) skb->data;
1063 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1064 break; /* must not overwrite AID */
1065 if (!skb_queue_is_last(&tx->skbs, skb)) {
1066 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1067 next_len = next->len;
1070 group_addr = is_multicast_ether_addr(hdr->addr1);
1073 ieee80211_duration(tx, skb, group_addr, next_len);
1079 /* actual transmit path */
1081 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1082 struct sk_buff *skb,
1083 struct ieee80211_tx_info *info,
1084 struct tid_ampdu_tx *tid_tx,
1087 bool queued = false;
1088 bool reset_agg_timer = false;
1089 struct sk_buff *purge_skb = NULL;
1091 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1092 info->flags |= IEEE80211_TX_CTL_AMPDU;
1093 reset_agg_timer = true;
1094 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1096 * nothing -- this aggregation session is being started
1097 * but that might still fail with the driver
1099 } else if (!tx->sta->sta.txq[tid]) {
1100 spin_lock(&tx->sta->lock);
1102 * Need to re-check now, because we may get here
1104 * 1) in the window during which the setup is actually
1105 * already done, but not marked yet because not all
1106 * packets are spliced over to the driver pending
1107 * queue yet -- if this happened we acquire the lock
1108 * either before or after the splice happens, but
1109 * need to recheck which of these cases happened.
1111 * 2) during session teardown, if the OPERATIONAL bit
1112 * was cleared due to the teardown but the pointer
1113 * hasn't been assigned NULL yet (or we loaded it
1114 * before it was assigned) -- in this case it may
1115 * now be NULL which means we should just let the
1116 * packet pass through because splicing the frames
1117 * back is already done.
1119 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1122 /* do nothing, let packet pass through */
1123 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1124 info->flags |= IEEE80211_TX_CTL_AMPDU;
1125 reset_agg_timer = true;
1128 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1129 clear_sta_flag(tx->sta, WLAN_STA_SP);
1130 ps_dbg(tx->sta->sdata,
1131 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1132 tx->sta->sta.addr, tx->sta->sta.aid);
1134 info->control.vif = &tx->sdata->vif;
1135 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1136 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
1137 __skb_queue_tail(&tid_tx->pending, skb);
1138 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1139 purge_skb = __skb_dequeue(&tid_tx->pending);
1141 spin_unlock(&tx->sta->lock);
1144 ieee80211_free_txskb(&tx->local->hw, purge_skb);
1147 /* reset session timer */
1148 if (reset_agg_timer)
1149 tid_tx->last_tx = jiffies;
1156 * pass %NULL for the station if unknown, a valid pointer if known
1157 * or an ERR_PTR() if the station is known not to exist
1159 static ieee80211_tx_result
1160 ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1161 struct ieee80211_tx_data *tx,
1162 struct sta_info *sta, struct sk_buff *skb)
1164 struct ieee80211_local *local = sdata->local;
1165 struct ieee80211_hdr *hdr;
1166 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1169 memset(tx, 0, sizeof(*tx));
1173 __skb_queue_head_init(&tx->skbs);
1176 * If this flag is set to true anywhere, and we get here,
1177 * we are doing the needed processing, so remove the flag
1180 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1182 hdr = (struct ieee80211_hdr *) skb->data;
1188 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1189 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1190 if (!tx->sta && sdata->wdev.use_4addr)
1192 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1193 IEEE80211_TX_CTL_INJECTED) ||
1194 tx->sdata->control_port_protocol == tx->skb->protocol) {
1195 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1197 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1198 tx->sta = sta_info_get(sdata, hdr->addr1);
1201 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
1202 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
1203 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1204 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1205 struct tid_ampdu_tx *tid_tx;
1207 tid = ieee80211_get_tid(hdr);
1209 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1213 queued = ieee80211_tx_prep_agg(tx, skb, info,
1216 if (unlikely(queued))
1221 if (is_multicast_ether_addr(hdr->addr1)) {
1222 tx->flags &= ~IEEE80211_TX_UNICAST;
1223 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1225 tx->flags |= IEEE80211_TX_UNICAST;
1227 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1228 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1229 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1230 info->flags & IEEE80211_TX_CTL_AMPDU)
1231 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1235 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1236 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
1237 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1238 ieee80211_check_fast_xmit(tx->sta);
1241 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1246 static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1247 struct ieee80211_vif *vif,
1248 struct sta_info *sta,
1249 struct sk_buff *skb)
1251 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1252 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1253 struct ieee80211_txq *txq = NULL;
1255 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1256 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1259 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1260 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
1261 ieee80211_is_bufferable_mmpdu(hdr->frame_control) ||
1262 vif->type == NL80211_IFTYPE_STATION) &&
1263 sta && sta->uploaded) {
1265 * This will be NULL if the driver didn't set the
1266 * opt-in hardware flag.
1268 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1271 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1276 txq = sta->sta.txq[tid];
1284 return to_txq_info(txq);
1287 static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1289 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1292 static u32 codel_skb_len_func(const struct sk_buff *skb)
1297 static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1299 const struct ieee80211_tx_info *info;
1301 info = (const struct ieee80211_tx_info *)skb->cb;
1302 return info->control.enqueue_time;
1305 static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1308 struct ieee80211_local *local;
1309 struct txq_info *txqi;
1311 struct fq_flow *flow;
1314 local = vif_to_sdata(txqi->txq.vif)->local;
1317 if (cvars == &txqi->def_cvars)
1318 flow = &txqi->def_flow;
1320 flow = &fq->flows[cvars - local->cvars];
1322 return fq_flow_dequeue(fq, flow);
1325 static void codel_drop_func(struct sk_buff *skb,
1328 struct ieee80211_local *local;
1329 struct ieee80211_hw *hw;
1330 struct txq_info *txqi;
1333 local = vif_to_sdata(txqi->txq.vif)->local;
1336 ieee80211_free_txskb(hw, skb);
1339 static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1341 struct fq_flow *flow)
1343 struct ieee80211_local *local;
1344 struct txq_info *txqi;
1345 struct codel_vars *cvars;
1346 struct codel_params *cparams;
1347 struct codel_stats *cstats;
1349 local = container_of(fq, struct ieee80211_local, fq);
1350 txqi = container_of(tin, struct txq_info, tin);
1351 cstats = &txqi->cstats;
1353 if (txqi->txq.sta) {
1354 struct sta_info *sta = container_of(txqi->txq.sta,
1355 struct sta_info, sta);
1356 cparams = &sta->cparams;
1358 cparams = &local->cparams;
1361 if (flow == &txqi->def_flow)
1362 cvars = &txqi->def_cvars;
1364 cvars = &local->cvars[flow - fq->flows];
1366 return codel_dequeue(txqi,
1372 codel_skb_time_func,
1374 codel_dequeue_func);
1377 static void fq_skb_free_func(struct fq *fq,
1379 struct fq_flow *flow,
1380 struct sk_buff *skb)
1382 struct ieee80211_local *local;
1384 local = container_of(fq, struct ieee80211_local, fq);
1385 ieee80211_free_txskb(&local->hw, skb);
1388 static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1391 struct sk_buff *skb)
1393 struct txq_info *txqi;
1395 txqi = container_of(tin, struct txq_info, tin);
1396 return &txqi->def_flow;
1399 static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1400 struct txq_info *txqi,
1401 struct sk_buff *skb)
1403 struct fq *fq = &local->fq;
1404 struct fq_tin *tin = &txqi->tin;
1405 u32 flow_idx = fq_flow_idx(fq, skb);
1407 ieee80211_set_skb_enqueue_time(skb);
1409 spin_lock_bh(&fq->lock);
1410 fq_tin_enqueue(fq, tin, flow_idx, skb,
1412 fq_flow_get_default_func);
1413 spin_unlock_bh(&fq->lock);
1416 static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1417 struct fq_flow *flow, struct sk_buff *skb,
1420 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1422 return info->control.vif == data;
1425 void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1426 struct ieee80211_sub_if_data *sdata)
1428 struct fq *fq = &local->fq;
1429 struct txq_info *txqi;
1431 struct ieee80211_sub_if_data *ap;
1433 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1436 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1441 txqi = to_txq_info(ap->vif.txq);
1444 spin_lock_bh(&fq->lock);
1445 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1447 spin_unlock_bh(&fq->lock);
1450 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1451 struct sta_info *sta,
1452 struct txq_info *txqi, int tid)
1454 fq_tin_init(&txqi->tin);
1455 fq_flow_init(&txqi->def_flow);
1456 codel_vars_init(&txqi->def_cvars);
1457 codel_stats_init(&txqi->cstats);
1458 __skb_queue_head_init(&txqi->frags);
1459 INIT_LIST_HEAD(&txqi->schedule_order);
1461 txqi->txq.vif = &sdata->vif;
1464 sdata->vif.txq = &txqi->txq;
1466 txqi->txq.ac = IEEE80211_AC_BE;
1471 if (tid == IEEE80211_NUM_TIDS) {
1472 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1473 /* Drivers need to opt in to the management MPDU TXQ */
1474 if (!ieee80211_hw_check(&sdata->local->hw,
1477 } else if (!ieee80211_hw_check(&sdata->local->hw,
1479 /* Drivers need to opt in to the bufferable MMPDU TXQ */
1482 txqi->txq.ac = IEEE80211_AC_VO;
1484 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1487 txqi->txq.sta = &sta->sta;
1488 txqi->txq.tid = tid;
1489 sta->sta.txq[tid] = &txqi->txq;
1492 void ieee80211_txq_purge(struct ieee80211_local *local,
1493 struct txq_info *txqi)
1495 struct fq *fq = &local->fq;
1496 struct fq_tin *tin = &txqi->tin;
1498 spin_lock_bh(&fq->lock);
1499 fq_tin_reset(fq, tin, fq_skb_free_func);
1500 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
1501 spin_unlock_bh(&fq->lock);
1503 spin_lock_bh(&local->active_txq_lock[txqi->txq.ac]);
1504 list_del_init(&txqi->schedule_order);
1505 spin_unlock_bh(&local->active_txq_lock[txqi->txq.ac]);
1508 void ieee80211_txq_set_params(struct ieee80211_local *local)
1510 if (local->hw.wiphy->txq_limit)
1511 local->fq.limit = local->hw.wiphy->txq_limit;
1513 local->hw.wiphy->txq_limit = local->fq.limit;
1515 if (local->hw.wiphy->txq_memory_limit)
1516 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1518 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1520 if (local->hw.wiphy->txq_quantum)
1521 local->fq.quantum = local->hw.wiphy->txq_quantum;
1523 local->hw.wiphy->txq_quantum = local->fq.quantum;
1526 int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1528 struct fq *fq = &local->fq;
1531 bool supp_vht = false;
1532 enum nl80211_band band;
1534 if (!local->ops->wake_tx_queue)
1537 ret = fq_init(fq, 4096);
1542 * If the hardware doesn't support VHT, it is safe to limit the maximum
1543 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1545 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1546 struct ieee80211_supported_band *sband;
1548 sband = local->hw.wiphy->bands[band];
1552 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1556 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1558 codel_params_init(&local->cparams);
1559 local->cparams.interval = MS2TIME(100);
1560 local->cparams.target = MS2TIME(20);
1561 local->cparams.ecn = true;
1563 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1565 if (!local->cvars) {
1566 spin_lock_bh(&fq->lock);
1567 fq_reset(fq, fq_skb_free_func);
1568 spin_unlock_bh(&fq->lock);
1572 for (i = 0; i < fq->flows_cnt; i++)
1573 codel_vars_init(&local->cvars[i]);
1575 ieee80211_txq_set_params(local);
1580 void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1582 struct fq *fq = &local->fq;
1584 if (!local->ops->wake_tx_queue)
1587 kfree(local->cvars);
1588 local->cvars = NULL;
1590 spin_lock_bh(&fq->lock);
1591 fq_reset(fq, fq_skb_free_func);
1592 spin_unlock_bh(&fq->lock);
1595 static bool ieee80211_queue_skb(struct ieee80211_local *local,
1596 struct ieee80211_sub_if_data *sdata,
1597 struct sta_info *sta,
1598 struct sk_buff *skb)
1600 struct ieee80211_vif *vif;
1601 struct txq_info *txqi;
1603 if (!local->ops->wake_tx_queue ||
1604 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1607 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1608 sdata = container_of(sdata->bss,
1609 struct ieee80211_sub_if_data, u.ap);
1612 txqi = ieee80211_get_txq(local, vif, sta, skb);
1617 ieee80211_txq_enqueue(local, txqi, skb);
1619 schedule_and_wake_txq(local, txqi);
1624 static bool ieee80211_tx_frags(struct ieee80211_local *local,
1625 struct ieee80211_vif *vif,
1626 struct ieee80211_sta *sta,
1627 struct sk_buff_head *skbs,
1630 struct ieee80211_tx_control control = {};
1631 struct sk_buff *skb, *tmp;
1632 unsigned long flags;
1634 skb_queue_walk_safe(skbs, skb, tmp) {
1635 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1636 int q = info->hw_queue;
1638 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1639 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1640 __skb_unlink(skb, skbs);
1641 ieee80211_free_txskb(&local->hw, skb);
1646 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1647 if (local->queue_stop_reasons[q] ||
1648 (!txpending && !skb_queue_empty(&local->pending[q]))) {
1649 if (unlikely(info->flags &
1650 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1651 if (local->queue_stop_reasons[q] &
1652 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1654 * Drop off-channel frames if queues
1655 * are stopped for any reason other
1656 * than off-channel operation. Never
1659 spin_unlock_irqrestore(
1660 &local->queue_stop_reason_lock,
1662 ieee80211_purge_tx_queue(&local->hw,
1669 * Since queue is stopped, queue up frames for
1670 * later transmission from the tx-pending
1671 * tasklet when the queue is woken again.
1674 skb_queue_splice_init(skbs,
1675 &local->pending[q]);
1677 skb_queue_splice_tail_init(skbs,
1678 &local->pending[q]);
1680 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1685 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1687 info->control.vif = vif;
1690 __skb_unlink(skb, skbs);
1691 drv_tx(local, &control, skb);
1698 * Returns false if the frame couldn't be transmitted but was queued instead.
1700 static bool __ieee80211_tx(struct ieee80211_local *local,
1701 struct sk_buff_head *skbs, int led_len,
1702 struct sta_info *sta, bool txpending)
1704 struct ieee80211_tx_info *info;
1705 struct ieee80211_sub_if_data *sdata;
1706 struct ieee80211_vif *vif;
1707 struct ieee80211_sta *pubsta;
1708 struct sk_buff *skb;
1712 if (WARN_ON(skb_queue_empty(skbs)))
1715 skb = skb_peek(skbs);
1716 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1717 info = IEEE80211_SKB_CB(skb);
1718 sdata = vif_to_sdata(info->control.vif);
1719 if (sta && !sta->uploaded)
1727 switch (sdata->vif.type) {
1728 case NL80211_IFTYPE_MONITOR:
1729 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1733 sdata = rcu_dereference(local->monitor_sdata);
1737 vif->hw_queue[skb_get_queue_mapping(skb)];
1738 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1739 ieee80211_purge_tx_queue(&local->hw, skbs);
1744 case NL80211_IFTYPE_AP_VLAN:
1745 sdata = container_of(sdata->bss,
1746 struct ieee80211_sub_if_data, u.ap);
1753 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1756 ieee80211_tpt_led_trig_tx(local, fc, led_len);
1758 WARN_ON_ONCE(!skb_queue_empty(skbs));
1764 * Invoke TX handlers, return 0 on success and non-zero if the
1765 * frame was dropped or queued.
1767 * The handlers are split into an early and late part. The latter is everything
1768 * that can be sensitive to reordering, and will be deferred to after packets
1769 * are dequeued from the intermediate queues (when they are enabled).
1771 static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1773 ieee80211_tx_result res = TX_DROP;
1775 #define CALL_TXH(txh) \
1778 if (res != TX_CONTINUE) \
1782 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1783 CALL_TXH(ieee80211_tx_h_check_assoc);
1784 CALL_TXH(ieee80211_tx_h_ps_buf);
1785 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1786 CALL_TXH(ieee80211_tx_h_select_key);
1787 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1788 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1791 if (unlikely(res == TX_DROP)) {
1792 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1794 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1796 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1798 } else if (unlikely(res == TX_QUEUED)) {
1799 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1807 * Late handlers can be called while the sta lock is held. Handlers that can
1808 * cause packets to be generated will cause deadlock!
1810 static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1812 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1813 ieee80211_tx_result res = TX_CONTINUE;
1815 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1816 __skb_queue_tail(&tx->skbs, tx->skb);
1821 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1822 CALL_TXH(ieee80211_tx_h_sequence);
1823 CALL_TXH(ieee80211_tx_h_fragment);
1824 /* handlers after fragment must be aware of tx info fragmentation! */
1825 CALL_TXH(ieee80211_tx_h_stats);
1826 CALL_TXH(ieee80211_tx_h_encrypt);
1827 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1828 CALL_TXH(ieee80211_tx_h_calculate_duration);
1832 if (unlikely(res == TX_DROP)) {
1833 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1835 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1837 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1839 } else if (unlikely(res == TX_QUEUED)) {
1840 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1847 static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1849 int r = invoke_tx_handlers_early(tx);
1853 return invoke_tx_handlers_late(tx);
1856 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1857 struct ieee80211_vif *vif, struct sk_buff *skb,
1858 int band, struct ieee80211_sta **sta)
1860 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1861 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1862 struct ieee80211_tx_data tx;
1863 struct sk_buff *skb2;
1865 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
1869 info->control.vif = vif;
1870 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1872 if (invoke_tx_handlers(&tx))
1877 *sta = &tx.sta->sta;
1882 /* this function isn't suitable for fragmented data frames */
1883 skb2 = __skb_dequeue(&tx.skbs);
1884 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1885 ieee80211_free_txskb(hw, skb2);
1886 ieee80211_purge_tx_queue(hw, &tx.skbs);
1892 EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1895 * Returns false if the frame couldn't be transmitted but was queued instead.
1897 static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1898 struct sta_info *sta, struct sk_buff *skb,
1899 bool txpending, u32 txdata_flags)
1901 struct ieee80211_local *local = sdata->local;
1902 struct ieee80211_tx_data tx;
1903 ieee80211_tx_result res_prepare;
1904 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1908 if (unlikely(skb->len < 10)) {
1913 /* initialises tx */
1915 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
1917 tx.flags |= txdata_flags;
1919 if (unlikely(res_prepare == TX_DROP)) {
1920 ieee80211_free_txskb(&local->hw, skb);
1922 } else if (unlikely(res_prepare == TX_QUEUED)) {
1926 /* set up hw_queue value early */
1927 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1928 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1930 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1932 if (invoke_tx_handlers_early(&tx))
1935 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1938 if (!invoke_tx_handlers_late(&tx))
1939 result = __ieee80211_tx(local, &tx.skbs, led_len,
1945 /* device xmit handlers */
1947 enum ieee80211_encrypt {
1953 static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1954 struct sk_buff *skb,
1956 enum ieee80211_encrypt encrypt)
1958 struct ieee80211_local *local = sdata->local;
1962 enc_tailroom = encrypt == ENCRYPT_MGMT ||
1963 (encrypt == ENCRYPT_DATA &&
1964 sdata->crypto_tx_tailroom_needed_cnt);
1967 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1968 tail_need -= skb_tailroom(skb);
1969 tail_need = max_t(int, tail_need, 0);
1972 if (skb_cloned(skb) &&
1973 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1974 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
1975 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1976 else if (head_need || tail_need)
1977 I802_DEBUG_INC(local->tx_expand_skb_head);
1981 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
1982 wiphy_debug(local->hw.wiphy,
1983 "failed to reallocate TX buffer\n");
1990 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1991 struct sta_info *sta, struct sk_buff *skb,
1994 struct ieee80211_local *local = sdata->local;
1995 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1996 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1998 enum ieee80211_encrypt encrypt;
2000 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
2001 encrypt = ENCRYPT_NO;
2002 else if (ieee80211_is_mgmt(hdr->frame_control))
2003 encrypt = ENCRYPT_MGMT;
2005 encrypt = ENCRYPT_DATA;
2007 headroom = local->tx_headroom;
2008 if (encrypt != ENCRYPT_NO)
2009 headroom += sdata->encrypt_headroom;
2010 headroom -= skb_headroom(skb);
2011 headroom = max_t(int, 0, headroom);
2013 if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) {
2014 ieee80211_free_txskb(&local->hw, skb);
2018 /* reload after potential resize */
2019 hdr = (struct ieee80211_hdr *) skb->data;
2020 info->control.vif = &sdata->vif;
2022 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2023 if (ieee80211_is_data(hdr->frame_control) &&
2024 is_unicast_ether_addr(hdr->addr1)) {
2025 if (mesh_nexthop_resolve(sdata, skb))
2026 return; /* skb queued: don't free */
2028 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2032 ieee80211_set_qos_hdr(sdata, skb);
2033 ieee80211_tx(sdata, sta, skb, false, txdata_flags);
2036 static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
2037 struct sk_buff *skb)
2039 struct ieee80211_radiotap_iterator iterator;
2040 struct ieee80211_radiotap_header *rthdr =
2041 (struct ieee80211_radiotap_header *) skb->data;
2042 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2043 struct ieee80211_supported_band *sband =
2044 local->hw.wiphy->bands[info->band];
2045 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2049 bool rate_found = false;
2050 u8 rate_retries = 0;
2052 u8 mcs_known, mcs_flags, mcs_bw;
2054 u8 vht_mcs = 0, vht_nss = 0;
2057 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2058 IEEE80211_TX_CTL_DONTFRAG;
2061 * for every radiotap entry that is present
2062 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2063 * entries present, or -EINVAL on error)
2067 ret = ieee80211_radiotap_iterator_next(&iterator);
2072 /* see if this argument is something we can use */
2073 switch (iterator.this_arg_index) {
2075 * You must take care when dereferencing iterator.this_arg
2076 * for multibyte types... the pointer is not aligned. Use
2077 * get_unaligned((type *)iterator.this_arg) to dereference
2078 * iterator.this_arg for type "type" safely on all arches.
2080 case IEEE80211_RADIOTAP_FLAGS:
2081 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2083 * this indicates that the skb we have been
2084 * handed has the 32-bit FCS CRC at the end...
2085 * we should react to that by snipping it off
2086 * because it will be recomputed and added
2089 if (skb->len < (iterator._max_length + FCS_LEN))
2092 skb_trim(skb, skb->len - FCS_LEN);
2094 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2095 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2096 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2097 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2100 case IEEE80211_RADIOTAP_TX_FLAGS:
2101 txflags = get_unaligned_le16(iterator.this_arg);
2102 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2103 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2106 case IEEE80211_RADIOTAP_RATE:
2107 rate = *iterator.this_arg;
2112 case IEEE80211_RADIOTAP_DATA_RETRIES:
2113 rate_retries = *iterator.this_arg;
2116 case IEEE80211_RADIOTAP_MCS:
2117 mcs_known = iterator.this_arg[0];
2118 mcs_flags = iterator.this_arg[1];
2119 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2123 rate = iterator.this_arg[2];
2124 rate_flags = IEEE80211_TX_RC_MCS;
2126 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2127 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2128 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2130 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2131 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2132 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2133 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2136 case IEEE80211_RADIOTAP_VHT:
2137 vht_known = get_unaligned_le16(iterator.this_arg);
2140 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2141 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2142 (iterator.this_arg[2] &
2143 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2144 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2146 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2147 if (iterator.this_arg[3] == 1)
2149 IEEE80211_TX_RC_40_MHZ_WIDTH;
2150 else if (iterator.this_arg[3] == 4)
2152 IEEE80211_TX_RC_80_MHZ_WIDTH;
2153 else if (iterator.this_arg[3] == 11)
2155 IEEE80211_TX_RC_160_MHZ_WIDTH;
2158 vht_mcs = iterator.this_arg[4] >> 4;
2161 vht_nss = iterator.this_arg[4] & 0xF;
2162 if (!vht_nss || vht_nss > 8)
2167 * Please update the file
2168 * Documentation/networking/mac80211-injection.txt
2169 * when parsing new fields here.
2177 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2181 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2183 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2184 info->control.rates[i].idx = -1;
2185 info->control.rates[i].flags = 0;
2186 info->control.rates[i].count = 0;
2189 if (rate_flags & IEEE80211_TX_RC_MCS) {
2190 info->control.rates[0].idx = rate;
2191 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2192 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2195 for (i = 0; i < sband->n_bitrates; i++) {
2196 if (rate * 5 != sband->bitrates[i].bitrate)
2199 info->control.rates[0].idx = i;
2204 if (info->control.rates[0].idx < 0)
2205 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2207 info->control.rates[0].flags = rate_flags;
2208 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2209 local->hw.max_rate_tries);
2213 * remove the radiotap header
2214 * iterator->_max_length was sanity-checked against
2215 * skb->len by iterator init
2217 skb_pull(skb, iterator._max_length);
2222 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2223 struct net_device *dev)
2225 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2226 struct ieee80211_chanctx_conf *chanctx_conf;
2227 struct ieee80211_radiotap_header *prthdr =
2228 (struct ieee80211_radiotap_header *)skb->data;
2229 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2230 struct ieee80211_hdr *hdr;
2231 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2232 struct cfg80211_chan_def *chandef;
2236 /* check for not even having the fixed radiotap header part */
2237 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2238 goto fail; /* too short to be possibly valid */
2240 /* is it a header version we can trust to find length from? */
2241 if (unlikely(prthdr->it_version))
2242 goto fail; /* only version 0 is supported */
2244 /* then there must be a radiotap header with a length we can use */
2245 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2247 /* does the skb contain enough to deliver on the alleged length? */
2248 if (unlikely(skb->len < len_rthdr))
2249 goto fail; /* skb too short for claimed rt header extent */
2252 * fix up the pointers accounting for the radiotap
2253 * header still being in there. We are being given
2254 * a precooked IEEE80211 header so no need for
2257 skb_set_mac_header(skb, len_rthdr);
2259 * these are just fixed to the end of the rt area since we
2260 * don't have any better information and at this point, nobody cares
2262 skb_set_network_header(skb, len_rthdr);
2263 skb_set_transport_header(skb, len_rthdr);
2265 if (skb->len < len_rthdr + 2)
2268 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2269 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2271 if (skb->len < len_rthdr + hdrlen)
2275 * Initialize skb->protocol if the injected frame is a data frame
2276 * carrying a rfc1042 header
2278 if (ieee80211_is_data(hdr->frame_control) &&
2279 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2280 u8 *payload = (u8 *)hdr + hdrlen;
2282 if (ether_addr_equal(payload, rfc1042_header))
2283 skb->protocol = cpu_to_be16((payload[6] << 8) |
2288 * Initialize skb->priority for QoS frames. This is put in the TID field
2289 * of the frame before passing it to the driver.
2291 if (ieee80211_is_data_qos(hdr->frame_control)) {
2292 u8 *p = ieee80211_get_qos_ctl(hdr);
2293 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
2296 memset(info, 0, sizeof(*info));
2298 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2299 IEEE80211_TX_CTL_INJECTED;
2304 * We process outgoing injected frames that have a local address
2305 * we handle as though they are non-injected frames.
2306 * This code here isn't entirely correct, the local MAC address
2307 * isn't always enough to find the interface to use; for proper
2308 * VLAN/WDS support we will need a different mechanism (which
2309 * likely isn't going to be monitor interfaces).
2311 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2313 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2314 if (!ieee80211_sdata_running(tmp_sdata))
2316 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2317 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2318 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2320 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
2326 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2327 if (!chanctx_conf) {
2328 tmp_sdata = rcu_dereference(local->monitor_sdata);
2331 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2335 chandef = &chanctx_conf->def;
2336 else if (!local->use_chanctx)
2337 chandef = &local->_oper_chandef;
2342 * Frame injection is not allowed if beaconing is not allowed
2343 * or if we need radar detection. Beaconing is usually not allowed when
2344 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2345 * Passive scan is also used in world regulatory domains where
2346 * your country is not known and as such it should be treated as
2347 * NO TX unless the channel is explicitly allowed in which case
2348 * your current regulatory domain would not have the passive scan
2351 * Since AP mode uses monitor interfaces to inject/TX management
2352 * frames we can make AP mode the exception to this rule once it
2353 * supports radar detection as its implementation can deal with
2354 * radar detection by itself. We can do that later by adding a
2355 * monitor flag interfaces used for AP support.
2357 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2361 info->band = chandef->chan->band;
2363 /* process and remove the injection radiotap header */
2364 if (!ieee80211_parse_tx_radiotap(local, skb))
2367 ieee80211_xmit(sdata, NULL, skb, 0);
2370 return NETDEV_TX_OK;
2376 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
2379 static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2381 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2383 return ethertype == ETH_P_TDLS &&
2385 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2388 static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2389 struct sk_buff *skb,
2390 struct sta_info **sta_out)
2392 struct sta_info *sta;
2394 switch (sdata->vif.type) {
2395 case NL80211_IFTYPE_AP_VLAN:
2396 sta = rcu_dereference(sdata->u.vlan.sta);
2400 } else if (sdata->wdev.use_4addr) {
2404 case NL80211_IFTYPE_AP:
2405 case NL80211_IFTYPE_OCB:
2406 case NL80211_IFTYPE_ADHOC:
2407 if (is_multicast_ether_addr(skb->data)) {
2408 *sta_out = ERR_PTR(-ENOENT);
2411 sta = sta_info_get_bss(sdata, skb->data);
2413 case NL80211_IFTYPE_WDS:
2414 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2416 #ifdef CONFIG_MAC80211_MESH
2417 case NL80211_IFTYPE_MESH_POINT:
2418 /* determined much later */
2422 case NL80211_IFTYPE_STATION:
2423 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2424 sta = sta_info_get(sdata, skb->data);
2425 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2426 if (test_sta_flag(sta,
2427 WLAN_STA_TDLS_PEER_AUTH)) {
2433 * TDLS link during setup - throw out frames to
2434 * peer. Allow TDLS-setup frames to unauthorized
2435 * peers for the special case of a link teardown
2436 * after a TDLS sta is removed due to being
2439 if (!ieee80211_is_tdls_setup(skb))
2445 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2453 *sta_out = sta ?: ERR_PTR(-ENOENT);
2458 * ieee80211_build_hdr - build 802.11 header in the given frame
2459 * @sdata: virtual interface to build the header for
2460 * @skb: the skb to build the header in
2461 * @info_flags: skb flags to set
2462 * @ctrl_flags: info control flags to set
2464 * This function takes the skb with 802.3 header and reformats the header to
2465 * the appropriate IEEE 802.11 header based on which interface the packet is
2466 * being transmitted on.
2468 * Note that this function also takes care of the TX status request and
2469 * potential unsharing of the SKB - this needs to be interleaved with the
2472 * The function requires the read-side RCU lock held
2474 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2476 static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2477 struct sk_buff *skb, u32 info_flags,
2478 struct sta_info *sta, u32 ctrl_flags)
2480 struct ieee80211_local *local = sdata->local;
2481 struct ieee80211_tx_info *info;
2483 u16 ethertype, hdrlen, meshhdrlen = 0;
2485 struct ieee80211_hdr hdr;
2486 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2487 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2488 const u8 *encaps_data;
2489 int encaps_len, skip_header_bytes;
2490 bool wme_sta = false, authorized = false;
2494 struct ieee80211_chanctx_conf *chanctx_conf;
2495 struct ieee80211_sub_if_data *ap_sdata;
2496 enum nl80211_band band;
2502 #ifdef CONFIG_MAC80211_DEBUGFS
2503 if (local->force_tx_status)
2504 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2507 /* convert Ethernet header to proper 802.11 header (based on
2508 * operation mode) */
2509 ethertype = (skb->data[12] << 8) | skb->data[13];
2510 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2512 switch (sdata->vif.type) {
2513 case NL80211_IFTYPE_AP_VLAN:
2514 if (sdata->wdev.use_4addr) {
2515 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2517 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2518 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2519 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2520 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2522 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2523 wme_sta = sta->sta.wme;
2525 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2527 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
2528 if (!chanctx_conf) {
2532 band = chanctx_conf->def.chan->band;
2533 if (sdata->wdev.use_4addr)
2536 case NL80211_IFTYPE_AP:
2537 if (sdata->vif.type == NL80211_IFTYPE_AP)
2538 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2539 if (!chanctx_conf) {
2543 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2545 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2546 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2547 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2549 band = chanctx_conf->def.chan->band;
2551 case NL80211_IFTYPE_WDS:
2552 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2554 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
2555 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2556 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2557 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2560 * This is the exception! WDS style interfaces are prohibited
2561 * when channel contexts are in used so this must be valid
2563 band = local->hw.conf.chandef.chan->band;
2565 #ifdef CONFIG_MAC80211_MESH
2566 case NL80211_IFTYPE_MESH_POINT:
2567 if (!is_multicast_ether_addr(skb->data)) {
2568 struct sta_info *next_hop;
2569 bool mpp_lookup = true;
2571 mpath = mesh_path_lookup(sdata, skb->data);
2574 next_hop = rcu_dereference(mpath->next_hop);
2576 !(mpath->flags & (MESH_PATH_ACTIVE |
2577 MESH_PATH_RESOLVING)))
2582 mppath = mpp_path_lookup(sdata, skb->data);
2584 mppath->exp_time = jiffies;
2587 if (mppath && mpath)
2588 mesh_path_del(sdata, mpath->dst);
2592 * Use address extension if it is a packet from
2593 * another interface or if we know the destination
2594 * is being proxied by a portal (i.e. portal address
2595 * differs from proxied address)
2597 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2598 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
2599 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2600 skb->data, skb->data + ETH_ALEN);
2601 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2604 /* DS -> MBSS (802.11-2012 13.11.3.3).
2605 * For unicast with unknown forwarding information,
2606 * destination might be in the MBSS or if that fails
2607 * forwarded to another mesh gate. In either case
2608 * resolution will be handled in ieee80211_xmit(), so
2609 * leave the original DA. This also works for mcast */
2610 const u8 *mesh_da = skb->data;
2613 mesh_da = mppath->mpp;
2615 mesh_da = mpath->dst;
2617 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2618 mesh_da, sdata->vif.addr);
2619 if (is_multicast_ether_addr(mesh_da))
2620 /* DA TA mSA AE:SA */
2621 meshhdrlen = ieee80211_new_mesh_header(
2623 skb->data + ETH_ALEN, NULL);
2625 /* RA TA mDA mSA AE:DA SA */
2626 meshhdrlen = ieee80211_new_mesh_header(
2627 sdata, &mesh_hdr, skb->data,
2628 skb->data + ETH_ALEN);
2631 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2632 if (!chanctx_conf) {
2636 band = chanctx_conf->def.chan->band;
2638 /* For injected frames, fill RA right away as nexthop lookup
2641 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2642 is_zero_ether_addr(hdr.addr1))
2643 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2646 case NL80211_IFTYPE_STATION:
2647 /* we already did checks when looking up the RA STA */
2648 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
2652 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2653 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2654 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2656 } else if (sdata->u.mgd.use_4addr &&
2657 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2658 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2659 IEEE80211_FCTL_TODS);
2661 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2662 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2663 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2664 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2667 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2669 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2670 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2671 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2674 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2675 if (!chanctx_conf) {
2679 band = chanctx_conf->def.chan->band;
2681 case NL80211_IFTYPE_OCB:
2683 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2684 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2685 eth_broadcast_addr(hdr.addr3);
2687 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2688 if (!chanctx_conf) {
2692 band = chanctx_conf->def.chan->band;
2694 case NL80211_IFTYPE_ADHOC:
2696 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2697 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2698 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2700 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2701 if (!chanctx_conf) {
2705 band = chanctx_conf->def.chan->band;
2712 multicast = is_multicast_ether_addr(hdr.addr1);
2714 /* sta is always NULL for mesh */
2716 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2717 wme_sta = sta->sta.wme;
2718 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2719 /* For mesh, the use of the QoS header is mandatory */
2723 /* receiver does QoS (which also means we do) use it */
2725 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2730 * Drop unicast frames to unauthorised stations unless they are
2731 * EAPOL frames from the local station.
2733 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2734 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2735 !multicast && !authorized &&
2736 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2737 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
2738 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2739 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2740 sdata->name, hdr.addr1);
2743 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2749 if (unlikely(!multicast && skb->sk &&
2750 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
2751 struct sk_buff *ack_skb = skb_clone_sk(skb);
2754 unsigned long flags;
2757 spin_lock_irqsave(&local->ack_status_lock, flags);
2758 id = idr_alloc(&local->ack_status_frames, ack_skb,
2759 1, 0x10000, GFP_ATOMIC);
2760 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2764 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2772 * If the skb is shared we need to obtain our own copy.
2774 if (skb_shared(skb)) {
2775 struct sk_buff *tmp_skb = skb;
2777 /* can't happen -- skb is a clone if info_id != 0 */
2780 skb = skb_clone(skb, GFP_ATOMIC);
2789 hdr.frame_control = fc;
2790 hdr.duration_id = 0;
2793 skip_header_bytes = ETH_HLEN;
2794 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2795 encaps_data = bridge_tunnel_header;
2796 encaps_len = sizeof(bridge_tunnel_header);
2797 skip_header_bytes -= 2;
2798 } else if (ethertype >= ETH_P_802_3_MIN) {
2799 encaps_data = rfc1042_header;
2800 encaps_len = sizeof(rfc1042_header);
2801 skip_header_bytes -= 2;
2807 skb_pull(skb, skip_header_bytes);
2808 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2811 * So we need to modify the skb header and hence need a copy of
2812 * that. The head_need variable above doesn't, so far, include
2813 * the needed header space that we don't need right away. If we
2814 * can, then we don't reallocate right now but only after the
2815 * frame arrives at the master device (if it does...)
2817 * If we cannot, however, then we will reallocate to include all
2818 * the ever needed space. Also, if we need to reallocate it anyway,
2819 * make it big enough for everything we may ever need.
2822 if (head_need > 0 || skb_cloned(skb)) {
2823 head_need += sdata->encrypt_headroom;
2824 head_need += local->tx_headroom;
2825 head_need = max_t(int, 0, head_need);
2826 if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) {
2827 ieee80211_free_txskb(&local->hw, skb);
2829 return ERR_PTR(-ENOMEM);
2834 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2836 #ifdef CONFIG_MAC80211_MESH
2838 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2841 if (ieee80211_is_data_qos(fc)) {
2842 __le16 *qos_control;
2844 qos_control = skb_push(skb, 2);
2845 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2847 * Maybe we could actually set some fields here, for now just
2848 * initialise to zero to indicate no special operation.
2852 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2854 skb_reset_mac_header(skb);
2856 info = IEEE80211_SKB_CB(skb);
2857 memset(info, 0, sizeof(*info));
2859 info->flags = info_flags;
2860 info->ack_frame_id = info_id;
2862 info->control.flags = ctrl_flags;
2867 return ERR_PTR(ret);
2871 * fast-xmit overview
2873 * The core idea of this fast-xmit is to remove per-packet checks by checking
2874 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2875 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2876 * much less work can be done per packet. For example, fragmentation must be
2877 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2880 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2881 * header and other data to aid packet processing in ieee80211_xmit_fast().
2883 * The most difficult part of this is that when any of these assumptions
2884 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2885 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2886 * since the per-packet code no longer checks the conditions. This is reflected
2887 * by the calls to these functions throughout the rest of the code, and must be
2888 * maintained if any of the TX path checks change.
2891 void ieee80211_check_fast_xmit(struct sta_info *sta)
2893 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2894 struct ieee80211_local *local = sta->local;
2895 struct ieee80211_sub_if_data *sdata = sta->sdata;
2896 struct ieee80211_hdr *hdr = (void *)build.hdr;
2897 struct ieee80211_chanctx_conf *chanctx_conf;
2900 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
2903 /* Locking here protects both the pointer itself, and against concurrent
2904 * invocations winning data access races to, e.g., the key pointer that
2906 * Without it, the invocation of this function right after the key
2907 * pointer changes wouldn't be sufficient, as another CPU could access
2908 * the pointer, then stall, and then do the cache update after the CPU
2909 * that invalidated the key.
2910 * With the locking, such scenarios cannot happen as the check for the
2911 * key and the fast-tx assignment are done atomically, so the CPU that
2912 * modifies the key will either wait or other one will see the key
2913 * cleared/changed already.
2915 spin_lock_bh(&sta->lock);
2916 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2917 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2918 sdata->vif.type == NL80211_IFTYPE_STATION)
2921 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2924 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2925 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2926 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2927 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
2930 if (sdata->noack_map)
2933 /* fast-xmit doesn't handle fragmentation at all */
2934 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2935 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
2939 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2940 if (!chanctx_conf) {
2944 build.band = chanctx_conf->def.chan->band;
2947 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2949 switch (sdata->vif.type) {
2950 case NL80211_IFTYPE_ADHOC:
2952 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2953 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2954 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2957 case NL80211_IFTYPE_STATION:
2958 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2960 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2961 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2962 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2967 if (sdata->u.mgd.use_4addr) {
2968 /* non-regular ethertype cannot use the fastpath */
2969 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2970 IEEE80211_FCTL_TODS);
2972 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2973 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2974 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2975 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2979 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2981 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2982 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2983 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2986 case NL80211_IFTYPE_AP_VLAN:
2987 if (sdata->wdev.use_4addr) {
2988 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2989 IEEE80211_FCTL_TODS);
2991 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2992 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2993 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2994 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2999 case NL80211_IFTYPE_AP:
3000 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
3002 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3003 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3004 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
3008 /* not handled on fast-xmit */
3014 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3017 /* We store the key here so there's no point in using rcu_dereference()
3018 * but that's fine because the code that changes the pointers will call
3019 * this function after doing so. For a single CPU that would be enough,
3020 * for multiple see the comment above.
3022 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3024 build.key = rcu_access_pointer(sdata->default_unicast_key);
3026 bool gen_iv, iv_spc, mmic;
3028 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3029 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
3030 mmic = build.key->conf.flags &
3031 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3032 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3034 /* don't handle software crypto */
3035 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3038 /* Key is being removed */
3039 if (build.key->flags & KEY_FLAG_TAINTED)
3042 switch (build.key->conf.cipher) {
3043 case WLAN_CIPHER_SUITE_CCMP:
3044 case WLAN_CIPHER_SUITE_CCMP_256:
3046 build.pn_offs = build.hdr_len;
3047 if (gen_iv || iv_spc)
3048 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3050 case WLAN_CIPHER_SUITE_GCMP:
3051 case WLAN_CIPHER_SUITE_GCMP_256:
3053 build.pn_offs = build.hdr_len;
3054 if (gen_iv || iv_spc)
3055 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3057 case WLAN_CIPHER_SUITE_TKIP:
3058 /* cannot handle MMIC or IV generation in xmit-fast */
3062 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3064 case WLAN_CIPHER_SUITE_WEP40:
3065 case WLAN_CIPHER_SUITE_WEP104:
3066 /* cannot handle IV generation in fast-xmit */
3070 build.hdr_len += IEEE80211_WEP_IV_LEN;
3072 case WLAN_CIPHER_SUITE_AES_CMAC:
3073 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3074 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3075 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3077 "management cipher suite 0x%x enabled for data\n",
3078 build.key->conf.cipher);
3081 /* we don't know how to generate IVs for this at all */
3082 if (WARN_ON(gen_iv))
3084 /* pure hardware keys are OK, of course */
3085 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3087 /* cipher scheme might require space allocation */
3089 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3092 build.hdr_len += build.key->conf.iv_len;
3095 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3098 hdr->frame_control = fc;
3100 memcpy(build.hdr + build.hdr_len,
3101 rfc1042_header, sizeof(rfc1042_header));
3102 build.hdr_len += sizeof(rfc1042_header);
3104 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3105 /* if the kmemdup fails, continue w/o fast_tx */
3110 /* we might have raced against another call to this function */
3111 old = rcu_dereference_protected(sta->fast_tx,
3112 lockdep_is_held(&sta->lock));
3113 rcu_assign_pointer(sta->fast_tx, fast_tx);
3115 kfree_rcu(old, rcu_head);
3116 spin_unlock_bh(&sta->lock);
3119 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3121 struct sta_info *sta;
3124 list_for_each_entry_rcu(sta, &local->sta_list, list)
3125 ieee80211_check_fast_xmit(sta);
3129 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3131 struct ieee80211_local *local = sdata->local;
3132 struct sta_info *sta;
3136 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3137 if (sdata != sta->sdata &&
3138 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3140 ieee80211_check_fast_xmit(sta);
3146 void ieee80211_clear_fast_xmit(struct sta_info *sta)
3148 struct ieee80211_fast_tx *fast_tx;
3150 spin_lock_bh(&sta->lock);
3151 fast_tx = rcu_dereference_protected(sta->fast_tx,
3152 lockdep_is_held(&sta->lock));
3153 RCU_INIT_POINTER(sta->fast_tx, NULL);
3154 spin_unlock_bh(&sta->lock);
3157 kfree_rcu(fast_tx, rcu_head);
3160 static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3161 struct sk_buff *skb, int headroom)
3163 if (skb_headroom(skb) < headroom) {
3164 I802_DEBUG_INC(local->tx_expand_skb_head);
3166 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
3167 wiphy_debug(local->hw.wiphy,
3168 "failed to reallocate TX buffer\n");
3176 static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3177 struct ieee80211_fast_tx *fast_tx,
3178 struct sk_buff *skb)
3180 struct ieee80211_local *local = sdata->local;
3181 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3182 struct ieee80211_hdr *hdr;
3183 struct ethhdr *amsdu_hdr;
3184 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3185 int subframe_len = skb->len - hdr_len;
3187 u8 *qc, *h_80211_src, *h_80211_dst;
3190 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3193 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3196 if (!ieee80211_amsdu_realloc_pad(local, skb,
3197 sizeof(*amsdu_hdr) +
3198 local->hw.extra_tx_headroom))
3201 data = skb_push(skb, sizeof(*amsdu_hdr));
3202 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3204 amsdu_hdr = data + hdr_len;
3205 /* h_80211_src/dst is addr* field within hdr */
3206 h_80211_src = data + fast_tx->sa_offs;
3207 h_80211_dst = data + fast_tx->da_offs;
3209 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3210 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3211 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3213 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3214 * fields needs to be changed to BSSID for A-MSDU frames depending
3215 * on FromDS/ToDS values.
3217 switch (sdata->vif.type) {
3218 case NL80211_IFTYPE_STATION:
3219 bssid = sdata->u.mgd.bssid;
3221 case NL80211_IFTYPE_AP:
3222 case NL80211_IFTYPE_AP_VLAN:
3223 bssid = sdata->vif.addr;
3229 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3230 ether_addr_copy(h_80211_src, bssid);
3232 if (bssid && ieee80211_has_tods(hdr->frame_control))
3233 ether_addr_copy(h_80211_dst, bssid);
3235 qc = ieee80211_get_qos_ctl(hdr);
3236 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3238 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3243 static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3244 struct sta_info *sta,
3245 struct ieee80211_fast_tx *fast_tx,
3246 struct sk_buff *skb)
3248 struct ieee80211_local *local = sdata->local;
3249 struct fq *fq = &local->fq;
3251 struct fq_flow *flow;
3252 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3253 struct ieee80211_txq *txq = sta->sta.txq[tid];
3254 struct txq_info *txqi;
3255 struct sk_buff **frag_tail, *head;
3256 int subframe_len = skb->len - ETH_ALEN;
3257 u8 max_subframes = sta->sta.max_amsdu_subframes;
3258 int max_frags = local->hw.max_tx_fragments;
3259 int max_amsdu_len = sta->sta.max_amsdu_len;
3265 unsigned int orig_len;
3266 int n = 2, nfrags, pad = 0;
3269 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3272 if (skb_is_gso(skb))
3278 txqi = to_txq_info(txq);
3279 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3282 if (sta->sta.max_rc_amsdu_len)
3283 max_amsdu_len = min_t(int, max_amsdu_len,
3284 sta->sta.max_rc_amsdu_len);
3286 if (sta->sta.max_tid_amsdu_len[tid])
3287 max_amsdu_len = min_t(int, max_amsdu_len,
3288 sta->sta.max_tid_amsdu_len[tid]);
3290 flow_idx = fq_flow_idx(fq, skb);
3292 spin_lock_bh(&fq->lock);
3294 /* TODO: Ideally aggregation should be done on dequeue to remain
3295 * responsive to environment changes.
3299 flow = fq_flow_classify(fq, tin, flow_idx, skb,
3300 fq_flow_get_default_func);
3301 head = skb_peek_tail(&flow->queue);
3302 if (!head || skb_is_gso(head))
3305 orig_truesize = head->truesize;
3306 orig_len = head->len;
3308 if (skb->len + head->len > max_amsdu_len)
3311 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3312 nfrags += 1 + skb_shinfo(head)->nr_frags;
3313 frag_tail = &skb_shinfo(head)->frag_list;
3314 while (*frag_tail) {
3315 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3316 frag_tail = &(*frag_tail)->next;
3320 if (max_subframes && n > max_subframes)
3323 if (max_frags && nfrags > max_frags)
3326 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3329 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3332 /* If n == 2, the "while (*frag_tail)" loop above didn't execute
3333 * and frag_tail should be &skb_shinfo(head)->frag_list.
3334 * However, ieee80211_amsdu_prepare_head() can reallocate it.
3335 * Reload frag_tail to have it pointing to the correct place.
3338 frag_tail = &skb_shinfo(head)->frag_list;
3341 * Pad out the previous subframe to a multiple of 4 by adding the
3342 * padding to the next one, that's being added. Note that head->len
3343 * is the length of the full A-MSDU, but that works since each time
3344 * we add a new subframe we pad out the previous one to a multiple
3345 * of 4 and thus it no longer matters in the next round.
3347 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3348 if ((head->len - hdrlen) & 3)
3349 pad = 4 - ((head->len - hdrlen) & 3);
3351 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
3356 data = skb_push(skb, ETH_ALEN + 2);
3357 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3359 data += 2 * ETH_ALEN;
3360 len = cpu_to_be16(subframe_len);
3361 memcpy(data, &len, 2);
3362 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3364 memset(skb_push(skb, pad), 0, pad);
3366 head->len += skb->len;
3367 head->data_len += skb->len;
3371 fq->memory_usage += head->truesize - orig_truesize;
3372 if (head->len != orig_len) {
3373 flow->backlog += head->len - orig_len;
3374 tin->backlog_bytes += head->len - orig_len;
3376 fq_recalc_backlog(fq, tin, flow);
3379 spin_unlock_bh(&fq->lock);
3385 * Can be called while the sta lock is held. Anything that can cause packets to
3386 * be generated will cause deadlock!
3388 static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3389 struct sta_info *sta, u8 pn_offs,
3390 struct ieee80211_key *key,
3391 struct sk_buff *skb)
3393 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3394 struct ieee80211_hdr *hdr = (void *)skb->data;
3395 u8 tid = IEEE80211_NUM_TIDS;
3398 info->control.hw_key = &key->conf;
3400 ieee80211_tx_stats(skb->dev, skb->len);
3402 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3403 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3404 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3406 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3407 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3408 sdata->sequence_number += 0x10;
3411 if (skb_shinfo(skb)->gso_size)
3412 sta->tx_stats.msdu[tid] +=
3413 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3415 sta->tx_stats.msdu[tid]++;
3417 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3419 /* statistics normally done by ieee80211_tx_h_stats (but that
3420 * has to consider fragmentation, so is more complex)
3422 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3423 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3427 u8 *crypto_hdr = skb->data + pn_offs;
3429 switch (key->conf.cipher) {
3430 case WLAN_CIPHER_SUITE_CCMP:
3431 case WLAN_CIPHER_SUITE_CCMP_256:
3432 case WLAN_CIPHER_SUITE_GCMP:
3433 case WLAN_CIPHER_SUITE_GCMP_256:
3434 pn = atomic64_inc_return(&key->conf.tx_pn);
3436 crypto_hdr[1] = pn >> 8;
3437 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3438 crypto_hdr[4] = pn >> 16;
3439 crypto_hdr[5] = pn >> 24;
3440 crypto_hdr[6] = pn >> 32;
3441 crypto_hdr[7] = pn >> 40;
3447 static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3448 struct sta_info *sta,
3449 struct ieee80211_fast_tx *fast_tx,
3450 struct sk_buff *skb)
3452 struct ieee80211_local *local = sdata->local;
3453 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3454 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3455 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3457 struct ieee80211_tx_info *info;
3458 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3459 struct ieee80211_tx_data tx;
3460 ieee80211_tx_result r;
3461 struct tid_ampdu_tx *tid_tx = NULL;
3462 u8 tid = IEEE80211_NUM_TIDS;
3464 /* control port protocol needs a lot of special handling */
3465 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3468 /* only RFC 1042 SNAP */
3469 if (ethertype < ETH_P_802_3_MIN)
3472 /* don't handle TX status request here either */
3473 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3476 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3477 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3478 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3480 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3482 if (tid_tx->timeout)
3483 tid_tx->last_tx = jiffies;
3487 /* after this point (skb is modified) we cannot return false */
3489 if (skb_shared(skb)) {
3490 struct sk_buff *tmp_skb = skb;
3492 skb = skb_clone(skb, GFP_ATOMIC);
3499 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3500 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3503 /* will not be crypto-handled beyond what we do here, so use false
3504 * as the may-encrypt argument for the resize to not account for
3505 * more room than we already have in 'extra_head'
3507 if (unlikely(ieee80211_skb_resize(sdata, skb,
3508 max_t(int, extra_head + hw_headroom -
3509 skb_headroom(skb), 0),
3515 memcpy(ð, skb->data, ETH_HLEN - 2);
3516 hdr = skb_push(skb, extra_head);
3517 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3518 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3519 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3521 info = IEEE80211_SKB_CB(skb);
3522 memset(info, 0, sizeof(*info));
3523 info->band = fast_tx->band;
3524 info->control.vif = &sdata->vif;
3525 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3526 IEEE80211_TX_CTL_DONTFRAG |
3527 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3528 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
3530 #ifdef CONFIG_MAC80211_DEBUGFS
3531 if (local->force_tx_status)
3532 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3535 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3536 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3537 *ieee80211_get_qos_ctl(hdr) = tid;
3540 __skb_queue_head_init(&tx.skbs);
3542 tx.flags = IEEE80211_TX_UNICAST;
3546 tx.key = fast_tx->key;
3548 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3550 r = ieee80211_tx_h_rate_ctrl(&tx);
3554 if (r != TX_CONTINUE) {
3561 if (ieee80211_queue_skb(local, sdata, sta, skb))
3564 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3567 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3568 sdata = container_of(sdata->bss,
3569 struct ieee80211_sub_if_data, u.ap);
3571 __skb_queue_tail(&tx.skbs, skb);
3572 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3576 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3577 struct ieee80211_txq *txq)
3579 struct ieee80211_local *local = hw_to_local(hw);
3580 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3581 struct ieee80211_hdr *hdr;
3582 struct sk_buff *skb = NULL;
3583 struct fq *fq = &local->fq;
3584 struct fq_tin *tin = &txqi->tin;
3585 struct ieee80211_tx_info *info;
3586 struct ieee80211_tx_data tx;
3587 ieee80211_tx_result r;
3588 struct ieee80211_vif *vif = txq->vif;
3590 WARN_ON_ONCE(softirq_count() == 0);
3593 spin_lock_bh(&fq->lock);
3595 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) ||
3596 test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags))
3599 if (vif->txqs_stopped[txq->ac]) {
3600 set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags);
3604 /* Make sure fragments stay together. */
3605 skb = __skb_dequeue(&txqi->frags);
3609 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3613 spin_unlock_bh(&fq->lock);
3615 hdr = (struct ieee80211_hdr *)skb->data;
3616 info = IEEE80211_SKB_CB(skb);
3618 memset(&tx, 0, sizeof(tx));
3619 __skb_queue_head_init(&tx.skbs);
3622 tx.sdata = vif_to_sdata(info->control.vif);
3625 tx.sta = container_of(txq->sta, struct sta_info, sta);
3627 * Drop unicast frames to unauthorised stations unless they are
3628 * EAPOL frames from the local station.
3630 if (unlikely(ieee80211_is_data(hdr->frame_control) &&
3631 !ieee80211_vif_is_mesh(&tx.sdata->vif) &&
3632 tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3633 !is_multicast_ether_addr(hdr->addr1) &&
3634 !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3635 (!(info->control.flags &
3636 IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3637 !ether_addr_equal(tx.sdata->vif.addr,
3639 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3640 ieee80211_free_txskb(&local->hw, skb);
3646 * The key can be removed while the packet was queued, so need to call
3647 * this here to get the current key.
3649 r = ieee80211_tx_h_select_key(&tx);
3650 if (r != TX_CONTINUE) {
3651 ieee80211_free_txskb(&local->hw, skb);
3655 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3656 info->flags |= IEEE80211_TX_CTL_AMPDU;
3658 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3660 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3661 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3666 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3667 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3669 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3672 if (invoke_tx_handlers_late(&tx))
3675 skb = __skb_dequeue(&tx.skbs);
3677 if (!skb_queue_empty(&tx.skbs)) {
3678 spin_lock_bh(&fq->lock);
3679 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
3680 spin_unlock_bh(&fq->lock);
3684 if (skb_has_frag_list(skb) &&
3685 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3686 if (skb_linearize(skb)) {
3687 ieee80211_free_txskb(&local->hw, skb);
3692 switch (tx.sdata->vif.type) {
3693 case NL80211_IFTYPE_MONITOR:
3694 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3695 vif = &tx.sdata->vif;
3698 tx.sdata = rcu_dereference(local->monitor_sdata);
3700 vif = &tx.sdata->vif;
3702 vif->hw_queue[skb_get_queue_mapping(skb)];
3703 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3704 ieee80211_free_txskb(&local->hw, skb);
3710 case NL80211_IFTYPE_AP_VLAN:
3711 tx.sdata = container_of(tx.sdata->bss,
3712 struct ieee80211_sub_if_data, u.ap);
3715 vif = &tx.sdata->vif;
3719 IEEE80211_SKB_CB(skb)->control.vif = vif;
3723 spin_unlock_bh(&fq->lock);
3727 EXPORT_SYMBOL(ieee80211_tx_dequeue);
3729 struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
3731 struct ieee80211_local *local = hw_to_local(hw);
3732 struct ieee80211_txq *ret = NULL;
3733 struct txq_info *txqi = NULL;
3735 spin_lock_bh(&local->active_txq_lock[ac]);
3738 txqi = list_first_entry_or_null(&local->active_txqs[ac],
3744 if (txqi->txq.sta) {
3745 struct sta_info *sta = container_of(txqi->txq.sta,
3746 struct sta_info, sta);
3748 if (sta->airtime[txqi->txq.ac].deficit < 0) {
3749 sta->airtime[txqi->txq.ac].deficit +=
3750 sta->airtime_weight;
3751 list_move_tail(&txqi->schedule_order,
3752 &local->active_txqs[txqi->txq.ac]);
3758 if (txqi->schedule_round == local->schedule_round[ac])
3761 list_del_init(&txqi->schedule_order);
3762 txqi->schedule_round = local->schedule_round[ac];
3766 spin_unlock_bh(&local->active_txq_lock[ac]);
3769 EXPORT_SYMBOL(ieee80211_next_txq);
3771 void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
3772 struct ieee80211_txq *txq,
3775 struct ieee80211_local *local = hw_to_local(hw);
3776 struct txq_info *txqi = to_txq_info(txq);
3778 spin_lock_bh(&local->active_txq_lock[txq->ac]);
3780 if (list_empty(&txqi->schedule_order) &&
3781 (force || !skb_queue_empty(&txqi->frags) ||
3782 txqi->tin.backlog_packets)) {
3783 /* If airtime accounting is active, always enqueue STAs at the
3784 * head of the list to ensure that they only get moved to the
3785 * back by the airtime DRR scheduler once they have a negative
3786 * deficit. A station that already has a negative deficit will
3787 * get immediately moved to the back of the list on the next
3788 * call to ieee80211_next_txq().
3790 if (txqi->txq.sta && local->airtime_flags &&
3791 wiphy_ext_feature_isset(local->hw.wiphy,
3792 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
3793 list_add(&txqi->schedule_order,
3794 &local->active_txqs[txq->ac]);
3796 list_add_tail(&txqi->schedule_order,
3797 &local->active_txqs[txq->ac]);
3800 spin_unlock_bh(&local->active_txq_lock[txq->ac]);
3802 EXPORT_SYMBOL(__ieee80211_schedule_txq);
3804 bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
3805 struct ieee80211_txq *txq)
3807 struct ieee80211_local *local = hw_to_local(hw);
3808 struct txq_info *iter, *tmp, *txqi = to_txq_info(txq);
3809 struct sta_info *sta;
3812 spin_lock_bh(&local->active_txq_lock[ac]);
3817 if (list_empty(&txqi->schedule_order))
3820 list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac],
3825 if (!iter->txq.sta) {
3826 list_move_tail(&iter->schedule_order,
3827 &local->active_txqs[ac]);
3830 sta = container_of(iter->txq.sta, struct sta_info, sta);
3831 if (sta->airtime[ac].deficit < 0)
3832 sta->airtime[ac].deficit += sta->airtime_weight;
3833 list_move_tail(&iter->schedule_order, &local->active_txqs[ac]);
3836 sta = container_of(txqi->txq.sta, struct sta_info, sta);
3837 if (sta->airtime[ac].deficit >= 0)
3840 sta->airtime[ac].deficit += sta->airtime_weight;
3841 list_move_tail(&txqi->schedule_order, &local->active_txqs[ac]);
3842 spin_unlock_bh(&local->active_txq_lock[ac]);
3846 if (!list_empty(&txqi->schedule_order))
3847 list_del_init(&txqi->schedule_order);
3848 spin_unlock_bh(&local->active_txq_lock[ac]);
3852 EXPORT_SYMBOL(ieee80211_txq_may_transmit);
3854 void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
3856 struct ieee80211_local *local = hw_to_local(hw);
3858 spin_lock_bh(&local->active_txq_lock[ac]);
3859 local->schedule_round[ac]++;
3860 spin_unlock_bh(&local->active_txq_lock[ac]);
3862 EXPORT_SYMBOL(ieee80211_txq_schedule_start);
3864 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3865 struct net_device *dev,
3869 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3870 struct ieee80211_local *local = sdata->local;
3871 struct sta_info *sta;
3872 struct sk_buff *next;
3874 if (unlikely(skb->len < ETH_HLEN)) {
3881 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3887 if (local->ops->wake_tx_queue) {
3888 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
3889 skb_set_queue_mapping(skb, queue);
3893 struct ieee80211_fast_tx *fast_tx;
3895 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
3897 fast_tx = rcu_dereference(sta->fast_tx);
3900 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
3904 if (skb_is_gso(skb)) {
3905 struct sk_buff *segs;
3907 segs = skb_gso_segment(skb, 0);
3915 /* we cannot process non-linear frames on this path */
3916 if (skb_linearize(skb)) {
3921 /* the frame could be fragmented, software-encrypted, and other
3922 * things so we cannot really handle checksum offload with it -
3923 * fix it up in software before we handle anything else.
3925 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3926 skb_set_transport_header(skb,
3927 skb_checksum_start_offset(skb));
3928 if (skb_checksum_help(skb))
3941 if (skb->protocol == sdata->control_port_protocol)
3942 ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
3944 skb = ieee80211_build_hdr(sdata, skb, info_flags,
3949 ieee80211_tx_stats(dev, skb->len);
3951 ieee80211_xmit(sdata, sta, skb, 0);
3960 static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
3965 err = skb_ensure_writable(skb, ETH_HLEN);
3969 eth = (void *)skb->data;
3970 ether_addr_copy(eth->h_dest, sta->sta.addr);
3975 static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
3976 struct net_device *dev)
3978 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3979 const struct ethhdr *eth = (void *)skb->data;
3980 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
3983 if (likely(!is_multicast_ether_addr(eth->h_dest)))
3986 switch (sdata->vif.type) {
3987 case NL80211_IFTYPE_AP_VLAN:
3988 if (sdata->u.vlan.sta)
3990 if (sdata->wdev.use_4addr)
3993 case NL80211_IFTYPE_AP:
3994 /* check runtime toggle for this bss */
3995 if (!sdata->bss->multicast_to_unicast)
4002 /* multicast to unicast conversion only for some payload */
4003 ethertype = eth->h_proto;
4004 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4005 ethertype = ethvlan->h_vlan_encapsulated_proto;
4006 switch (ethertype) {
4007 case htons(ETH_P_ARP):
4008 case htons(ETH_P_IP):
4009 case htons(ETH_P_IPV6):
4019 ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4020 struct sk_buff_head *queue)
4022 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4023 struct ieee80211_local *local = sdata->local;
4024 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4025 struct sta_info *sta, *first = NULL;
4026 struct sk_buff *cloned_skb;
4030 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4031 if (sdata != sta->sdata)
4032 /* AP-VLAN mismatch */
4034 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4035 /* do not send back to source */
4041 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4044 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4045 dev_kfree_skb(cloned_skb);
4048 __skb_queue_tail(queue, cloned_skb);
4051 if (likely(first)) {
4052 if (unlikely(ieee80211_change_da(skb, first)))
4054 __skb_queue_tail(queue, skb);
4056 /* no STA connected, drop */
4063 __skb_queue_purge(queue);
4064 __skb_queue_tail(queue, skb);
4070 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4071 * @skb: packet to be sent
4072 * @dev: incoming interface
4074 * On failure skb will be freed.
4076 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4077 struct net_device *dev)
4079 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4080 struct sk_buff_head queue;
4082 __skb_queue_head_init(&queue);
4083 ieee80211_convert_to_unicast(skb, dev, &queue);
4084 while ((skb = __skb_dequeue(&queue)))
4085 __ieee80211_subif_start_xmit(skb, dev, 0, 0);
4087 __ieee80211_subif_start_xmit(skb, dev, 0, 0);
4090 return NETDEV_TX_OK;
4094 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4095 struct sk_buff *skb, u32 info_flags)
4097 struct ieee80211_hdr *hdr;
4098 struct ieee80211_tx_data tx = {
4099 .local = sdata->local,
4102 struct sta_info *sta;
4106 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4108 skb = ERR_PTR(-EINVAL);
4112 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0);
4116 hdr = (void *)skb->data;
4117 tx.sta = sta_info_get(sdata, hdr->addr1);
4120 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4123 return ERR_PTR(-EINVAL);
4132 * ieee80211_clear_tx_pending may not be called in a context where
4133 * it is possible that it packets could come in again.
4135 void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4137 struct sk_buff *skb;
4140 for (i = 0; i < local->hw.queues; i++) {
4141 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4142 ieee80211_free_txskb(&local->hw, skb);
4147 * Returns false if the frame couldn't be transmitted but was queued instead,
4148 * which in this case means re-queued -- take as an indication to stop sending
4149 * more pending frames.
4151 static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4152 struct sk_buff *skb)
4154 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4155 struct ieee80211_sub_if_data *sdata;
4156 struct sta_info *sta;
4157 struct ieee80211_hdr *hdr;
4159 struct ieee80211_chanctx_conf *chanctx_conf;
4161 sdata = vif_to_sdata(info->control.vif);
4163 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
4164 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4165 if (unlikely(!chanctx_conf)) {
4169 info->band = chanctx_conf->def.chan->band;
4170 result = ieee80211_tx(sdata, NULL, skb, true, 0);
4172 struct sk_buff_head skbs;
4174 __skb_queue_head_init(&skbs);
4175 __skb_queue_tail(&skbs, skb);
4177 hdr = (struct ieee80211_hdr *)skb->data;
4178 sta = sta_info_get(sdata, hdr->addr1);
4180 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
4187 * Transmit all pending packets. Called from tasklet.
4189 void ieee80211_tx_pending(unsigned long data)
4191 struct ieee80211_local *local = (struct ieee80211_local *)data;
4192 unsigned long flags;
4198 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4199 for (i = 0; i < local->hw.queues; i++) {
4201 * If queue is stopped by something other than due to pending
4202 * frames, or we have no pending frames, proceed to next queue.
4204 if (local->queue_stop_reasons[i] ||
4205 skb_queue_empty(&local->pending[i]))
4208 while (!skb_queue_empty(&local->pending[i])) {
4209 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
4210 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4212 if (WARN_ON(!info->control.vif)) {
4213 ieee80211_free_txskb(&local->hw, skb);
4217 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4220 txok = ieee80211_tx_pending_skb(local, skb);
4221 spin_lock_irqsave(&local->queue_stop_reason_lock,
4227 if (skb_queue_empty(&local->pending[i]))
4228 ieee80211_propagate_queue_wake(local, i);
4230 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4235 /* functions for drivers to get certain frames */
4237 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4238 struct ps_data *ps, struct sk_buff *skb,
4243 int i, have_bits = 0, n1, n2;
4245 /* Generate bitmap for TIM only if there are any STAs in power save
4247 if (atomic_read(&ps->num_sta_ps) > 0)
4248 /* in the hope that this is faster than
4249 * checking byte-for-byte */
4250 have_bits = !bitmap_empty((unsigned long *)ps->tim,
4251 IEEE80211_MAX_AID+1);
4253 if (ps->dtim_count == 0)
4254 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
4259 tim = pos = skb_put(skb, 6);
4260 *pos++ = WLAN_EID_TIM;
4262 *pos++ = ps->dtim_count;
4263 *pos++ = sdata->vif.bss_conf.dtim_period;
4265 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
4268 ps->dtim_bc_mc = aid0 == 1;
4271 /* Find largest even number N1 so that bits numbered 1 through
4272 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4273 * (N2 + 1) x 8 through 2007 are 0. */
4275 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4282 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4289 /* Bitmap control */
4291 /* Part Virt Bitmap */
4292 skb_put(skb, n2 - n1);
4293 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
4295 tim[1] = n2 - n1 + 4;
4297 *pos++ = aid0; /* Bitmap control */
4298 *pos++ = 0; /* Part Virt Bitmap */
4302 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4303 struct ps_data *ps, struct sk_buff *skb,
4306 struct ieee80211_local *local = sdata->local;
4309 * Not very nice, but we want to allow the driver to call
4310 * ieee80211_beacon_get() as a response to the set_tim()
4311 * callback. That, however, is already invoked under the
4312 * sta_lock to guarantee consistent and race-free update
4313 * of the tim bitmap in mac80211 and the driver.
4315 if (local->tim_in_locked_section) {
4316 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4318 spin_lock_bh(&local->tim_lock);
4319 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4320 spin_unlock_bh(&local->tim_lock);
4326 static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
4327 struct beacon_data *beacon)
4329 struct probe_resp *resp;
4331 size_t beacon_data_len;
4333 u8 count = beacon->csa_current_counter;
4335 switch (sdata->vif.type) {
4336 case NL80211_IFTYPE_AP:
4337 beacon_data = beacon->tail;
4338 beacon_data_len = beacon->tail_len;
4340 case NL80211_IFTYPE_ADHOC:
4341 beacon_data = beacon->head;
4342 beacon_data_len = beacon->head_len;
4344 case NL80211_IFTYPE_MESH_POINT:
4345 beacon_data = beacon->head;
4346 beacon_data_len = beacon->head_len;
4353 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
4354 resp = rcu_dereference(sdata->u.ap.probe_resp);
4356 if (beacon->csa_counter_offsets[i]) {
4357 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
4363 beacon_data[beacon->csa_counter_offsets[i]] = count;
4366 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4367 resp->data[resp->csa_counter_offsets[i]] = count;
4372 static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
4374 beacon->csa_current_counter--;
4376 /* the counter should never reach 0 */
4377 WARN_ON_ONCE(!beacon->csa_current_counter);
4379 return beacon->csa_current_counter;
4382 u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
4384 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4385 struct beacon_data *beacon = NULL;
4390 if (sdata->vif.type == NL80211_IFTYPE_AP)
4391 beacon = rcu_dereference(sdata->u.ap.beacon);
4392 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4393 beacon = rcu_dereference(sdata->u.ibss.presp);
4394 else if (ieee80211_vif_is_mesh(&sdata->vif))
4395 beacon = rcu_dereference(sdata->u.mesh.beacon);
4400 count = __ieee80211_csa_update_counter(beacon);
4406 EXPORT_SYMBOL(ieee80211_csa_update_counter);
4408 void ieee80211_csa_set_counter(struct ieee80211_vif *vif, u8 counter)
4410 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4411 struct beacon_data *beacon = NULL;
4415 if (sdata->vif.type == NL80211_IFTYPE_AP)
4416 beacon = rcu_dereference(sdata->u.ap.beacon);
4417 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4418 beacon = rcu_dereference(sdata->u.ibss.presp);
4419 else if (ieee80211_vif_is_mesh(&sdata->vif))
4420 beacon = rcu_dereference(sdata->u.mesh.beacon);
4425 if (counter < beacon->csa_current_counter)
4426 beacon->csa_current_counter = counter;
4431 EXPORT_SYMBOL(ieee80211_csa_set_counter);
4433 bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
4435 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4436 struct beacon_data *beacon = NULL;
4438 size_t beacon_data_len;
4441 if (!ieee80211_sdata_running(sdata))
4445 if (vif->type == NL80211_IFTYPE_AP) {
4446 struct ieee80211_if_ap *ap = &sdata->u.ap;
4448 beacon = rcu_dereference(ap->beacon);
4449 if (WARN_ON(!beacon || !beacon->tail))
4451 beacon_data = beacon->tail;
4452 beacon_data_len = beacon->tail_len;
4453 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4454 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4456 beacon = rcu_dereference(ifibss->presp);
4460 beacon_data = beacon->head;
4461 beacon_data_len = beacon->head_len;
4462 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4463 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4465 beacon = rcu_dereference(ifmsh->beacon);
4469 beacon_data = beacon->head;
4470 beacon_data_len = beacon->head_len;
4476 if (!beacon->csa_counter_offsets[0])
4479 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
4482 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
4489 EXPORT_SYMBOL(ieee80211_csa_is_complete);
4491 static struct sk_buff *
4492 __ieee80211_beacon_get(struct ieee80211_hw *hw,
4493 struct ieee80211_vif *vif,
4494 struct ieee80211_mutable_offsets *offs,
4497 struct ieee80211_local *local = hw_to_local(hw);
4498 struct beacon_data *beacon = NULL;
4499 struct sk_buff *skb = NULL;
4500 struct ieee80211_tx_info *info;
4501 struct ieee80211_sub_if_data *sdata = NULL;
4502 enum nl80211_band band;
4503 struct ieee80211_tx_rate_control txrc;
4504 struct ieee80211_chanctx_conf *chanctx_conf;
4505 int csa_off_base = 0;
4509 sdata = vif_to_sdata(vif);
4510 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4512 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
4516 memset(offs, 0, sizeof(*offs));
4518 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4519 struct ieee80211_if_ap *ap = &sdata->u.ap;
4521 beacon = rcu_dereference(ap->beacon);
4523 if (beacon->csa_counter_offsets[0]) {
4525 __ieee80211_csa_update_counter(beacon);
4527 ieee80211_set_csa(sdata, beacon);
4531 * headroom, head length,
4532 * tail length and maximum TIM length
4534 skb = dev_alloc_skb(local->tx_headroom +
4536 beacon->tail_len + 256 +
4537 local->hw.extra_beacon_tailroom);
4541 skb_reserve(skb, local->tx_headroom);
4542 skb_put_data(skb, beacon->head, beacon->head_len);
4544 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4548 offs->tim_offset = beacon->head_len;
4549 offs->tim_length = skb->len - beacon->head_len;
4551 /* for AP the csa offsets are from tail */
4552 csa_off_base = skb->len;
4556 skb_put_data(skb, beacon->tail,
4560 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
4561 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4562 struct ieee80211_hdr *hdr;
4564 beacon = rcu_dereference(ifibss->presp);
4568 if (beacon->csa_counter_offsets[0]) {
4570 __ieee80211_csa_update_counter(beacon);
4572 ieee80211_set_csa(sdata, beacon);
4575 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
4576 local->hw.extra_beacon_tailroom);
4579 skb_reserve(skb, local->tx_headroom);
4580 skb_put_data(skb, beacon->head, beacon->head_len);
4582 hdr = (struct ieee80211_hdr *) skb->data;
4583 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4584 IEEE80211_STYPE_BEACON);
4585 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4586 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4588 beacon = rcu_dereference(ifmsh->beacon);
4592 if (beacon->csa_counter_offsets[0]) {
4594 /* TODO: For mesh csa_counter is in TU, so
4595 * decrementing it by one isn't correct, but
4596 * for now we leave it consistent with overall
4597 * mac80211's behavior.
4599 __ieee80211_csa_update_counter(beacon);
4601 ieee80211_set_csa(sdata, beacon);
4604 if (ifmsh->sync_ops)
4605 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
4607 skb = dev_alloc_skb(local->tx_headroom +
4611 local->hw.extra_beacon_tailroom);
4614 skb_reserve(skb, local->tx_headroom);
4615 skb_put_data(skb, beacon->head, beacon->head_len);
4616 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4619 offs->tim_offset = beacon->head_len;
4620 offs->tim_length = skb->len - beacon->head_len;
4623 skb_put_data(skb, beacon->tail, beacon->tail_len);
4630 if (offs && beacon) {
4633 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
4634 u16 csa_off = beacon->csa_counter_offsets[i];
4639 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4643 band = chanctx_conf->def.chan->band;
4645 info = IEEE80211_SKB_CB(skb);
4647 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
4648 info->flags |= IEEE80211_TX_CTL_NO_ACK;
4651 memset(&txrc, 0, sizeof(txrc));
4653 txrc.sband = local->hw.wiphy->bands[band];
4654 txrc.bss_conf = &sdata->vif.bss_conf;
4656 txrc.reported_rate.idx = -1;
4657 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
4659 rate_control_get_rate(sdata, NULL, &txrc);
4661 info->control.vif = vif;
4663 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4664 IEEE80211_TX_CTL_ASSIGN_SEQ |
4665 IEEE80211_TX_CTL_FIRST_FRAGMENT;
4673 ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4674 struct ieee80211_vif *vif,
4675 struct ieee80211_mutable_offsets *offs)
4677 return __ieee80211_beacon_get(hw, vif, offs, true);
4679 EXPORT_SYMBOL(ieee80211_beacon_get_template);
4681 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4682 struct ieee80211_vif *vif,
4683 u16 *tim_offset, u16 *tim_length)
4685 struct ieee80211_mutable_offsets offs = {};
4686 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
4687 struct sk_buff *copy;
4688 struct ieee80211_supported_band *sband;
4695 *tim_offset = offs.tim_offset;
4698 *tim_length = offs.tim_length;
4700 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4701 !hw_to_local(hw)->monitors)
4704 /* send a copy to monitor interfaces */
4705 copy = skb_copy(bcn, GFP_ATOMIC);
4709 shift = ieee80211_vif_get_shift(vif);
4710 sband = ieee80211_get_sband(vif_to_sdata(vif));
4714 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false,
4719 EXPORT_SYMBOL(ieee80211_beacon_get_tim);
4721 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4722 struct ieee80211_vif *vif)
4724 struct ieee80211_if_ap *ap = NULL;
4725 struct sk_buff *skb = NULL;
4726 struct probe_resp *presp = NULL;
4727 struct ieee80211_hdr *hdr;
4728 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4730 if (sdata->vif.type != NL80211_IFTYPE_AP)
4736 presp = rcu_dereference(ap->probe_resp);
4740 skb = dev_alloc_skb(presp->len);
4744 skb_put_data(skb, presp->data, presp->len);
4746 hdr = (struct ieee80211_hdr *) skb->data;
4747 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4753 EXPORT_SYMBOL(ieee80211_proberesp_get);
4755 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4756 struct ieee80211_vif *vif)
4758 struct ieee80211_sub_if_data *sdata;
4759 struct ieee80211_if_managed *ifmgd;
4760 struct ieee80211_pspoll *pspoll;
4761 struct ieee80211_local *local;
4762 struct sk_buff *skb;
4764 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4767 sdata = vif_to_sdata(vif);
4768 ifmgd = &sdata->u.mgd;
4769 local = sdata->local;
4771 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
4775 skb_reserve(skb, local->hw.extra_tx_headroom);
4777 pspoll = skb_put_zero(skb, sizeof(*pspoll));
4778 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4779 IEEE80211_STYPE_PSPOLL);
4780 pspoll->aid = cpu_to_le16(ifmgd->aid);
4782 /* aid in PS-Poll has its two MSBs each set to 1 */
4783 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4785 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4786 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4790 EXPORT_SYMBOL(ieee80211_pspoll_get);
4792 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4793 struct ieee80211_vif *vif,
4796 struct ieee80211_hdr_3addr *nullfunc;
4797 struct ieee80211_sub_if_data *sdata;
4798 struct ieee80211_if_managed *ifmgd;
4799 struct ieee80211_local *local;
4800 struct sk_buff *skb;
4803 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4806 sdata = vif_to_sdata(vif);
4807 ifmgd = &sdata->u.mgd;
4808 local = sdata->local;
4811 struct sta_info *sta;
4814 sta = sta_info_get(sdata, ifmgd->bssid);
4815 qos = sta && sta->sta.wme;
4819 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
4820 sizeof(*nullfunc) + 2);
4824 skb_reserve(skb, local->hw.extra_tx_headroom);
4826 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
4827 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4828 IEEE80211_STYPE_NULLFUNC |
4829 IEEE80211_FCTL_TODS);
4831 __le16 qoshdr = cpu_to_le16(7);
4833 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
4834 IEEE80211_STYPE_NULLFUNC) !=
4835 IEEE80211_STYPE_QOS_NULLFUNC);
4836 nullfunc->frame_control |=
4837 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
4839 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
4840 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
4843 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4844 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4845 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4849 EXPORT_SYMBOL(ieee80211_nullfunc_get);
4851 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
4853 const u8 *ssid, size_t ssid_len,
4856 struct ieee80211_local *local = hw_to_local(hw);
4857 struct ieee80211_hdr_3addr *hdr;
4858 struct sk_buff *skb;
4862 ie_ssid_len = 2 + ssid_len;
4864 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
4865 ie_ssid_len + tailroom);
4869 skb_reserve(skb, local->hw.extra_tx_headroom);
4871 hdr = skb_put_zero(skb, sizeof(*hdr));
4872 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4873 IEEE80211_STYPE_PROBE_REQ);
4874 eth_broadcast_addr(hdr->addr1);
4875 memcpy(hdr->addr2, src_addr, ETH_ALEN);
4876 eth_broadcast_addr(hdr->addr3);
4878 pos = skb_put(skb, ie_ssid_len);
4879 *pos++ = WLAN_EID_SSID;
4882 memcpy(pos, ssid, ssid_len);
4887 EXPORT_SYMBOL(ieee80211_probereq_get);
4889 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4890 const void *frame, size_t frame_len,
4891 const struct ieee80211_tx_info *frame_txctl,
4892 struct ieee80211_rts *rts)
4894 const struct ieee80211_hdr *hdr = frame;
4896 rts->frame_control =
4897 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
4898 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4900 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4901 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4903 EXPORT_SYMBOL(ieee80211_rts_get);
4905 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4906 const void *frame, size_t frame_len,
4907 const struct ieee80211_tx_info *frame_txctl,
4908 struct ieee80211_cts *cts)
4910 const struct ieee80211_hdr *hdr = frame;
4912 cts->frame_control =
4913 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
4914 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4915 frame_len, frame_txctl);
4916 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4918 EXPORT_SYMBOL(ieee80211_ctstoself_get);
4921 ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
4922 struct ieee80211_vif *vif)
4924 struct ieee80211_local *local = hw_to_local(hw);
4925 struct sk_buff *skb = NULL;
4926 struct ieee80211_tx_data tx;
4927 struct ieee80211_sub_if_data *sdata;
4929 struct ieee80211_tx_info *info;
4930 struct ieee80211_chanctx_conf *chanctx_conf;
4932 sdata = vif_to_sdata(vif);
4935 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4940 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4941 struct beacon_data *beacon =
4942 rcu_dereference(sdata->u.ap.beacon);
4944 if (!beacon || !beacon->head)
4947 ps = &sdata->u.ap.ps;
4948 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4949 ps = &sdata->u.mesh.ps;
4954 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
4955 goto out; /* send buffered bc/mc only after DTIM beacon */
4958 skb = skb_dequeue(&ps->bc_buf);
4961 local->total_ps_buffered--;
4963 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
4964 struct ieee80211_hdr *hdr =
4965 (struct ieee80211_hdr *) skb->data;
4966 /* more buffered multicast/broadcast frames ==> set
4967 * MoreData flag in IEEE 802.11 header to inform PS
4969 hdr->frame_control |=
4970 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4973 if (sdata->vif.type == NL80211_IFTYPE_AP)
4974 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
4975 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
4977 ieee80211_free_txskb(hw, skb);
4980 info = IEEE80211_SKB_CB(skb);
4982 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4983 info->band = chanctx_conf->def.chan->band;
4985 if (invoke_tx_handlers(&tx))
4992 EXPORT_SYMBOL(ieee80211_get_buffered_bc);
4994 int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4996 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4997 struct ieee80211_sub_if_data *sdata = sta->sdata;
4998 struct ieee80211_local *local = sdata->local;
5002 lockdep_assert_held(&local->sta_mtx);
5004 /* only some cases are supported right now */
5005 switch (sdata->vif.type) {
5006 case NL80211_IFTYPE_STATION:
5007 case NL80211_IFTYPE_AP:
5008 case NL80211_IFTYPE_AP_VLAN:
5015 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5018 if (sta->reserved_tid == tid) {
5023 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5024 sdata_err(sdata, "TID reservation already active\n");
5029 ieee80211_stop_vif_queues(sdata->local, sdata,
5030 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5034 /* Tear down BA sessions so we stop aggregating on this TID */
5035 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
5036 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
5037 __ieee80211_stop_tx_ba_session(sta, tid,
5038 AGG_STOP_LOCAL_REQUEST);
5041 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
5042 __ieee80211_flush_queues(local, sdata, queues, false);
5044 sta->reserved_tid = tid;
5046 ieee80211_wake_vif_queues(local, sdata,
5047 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5049 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
5050 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
5056 EXPORT_SYMBOL(ieee80211_reserve_tid);
5058 void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5060 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5061 struct ieee80211_sub_if_data *sdata = sta->sdata;
5063 lockdep_assert_held(&sdata->local->sta_mtx);
5065 /* only some cases are supported right now */
5066 switch (sdata->vif.type) {
5067 case NL80211_IFTYPE_STATION:
5068 case NL80211_IFTYPE_AP:
5069 case NL80211_IFTYPE_AP_VLAN:
5076 if (tid != sta->reserved_tid) {
5077 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
5081 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
5083 EXPORT_SYMBOL(ieee80211_unreserve_tid);
5085 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
5086 struct sk_buff *skb, int tid,
5087 enum nl80211_band band, u32 txdata_flags)
5089 int ac = ieee80211_ac_from_tid(tid);
5091 skb_reset_mac_header(skb);
5092 skb_set_queue_mapping(skb, ac);
5093 skb->priority = tid;
5095 skb->dev = sdata->dev;
5098 * The other path calling ieee80211_xmit is from the tasklet,
5099 * and while we can handle concurrent transmissions locking
5100 * requirements are that we do not come into tx with bhs on.
5103 IEEE80211_SKB_CB(skb)->band = band;
5104 ieee80211_xmit(sdata, NULL, skb, txdata_flags);
5108 int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
5109 const u8 *buf, size_t len,
5110 const u8 *dest, __be16 proto, bool unencrypted)
5112 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5113 struct ieee80211_local *local = sdata->local;
5114 struct sk_buff *skb;
5115 struct ethhdr *ehdr;
5119 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
5120 * or Pre-Authentication
5122 if (proto != sdata->control_port_protocol &&
5123 proto != cpu_to_be16(ETH_P_PREAUTH))
5126 if (proto == sdata->control_port_protocol)
5127 ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
5128 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
5131 flags = IEEE80211_TX_INTFL_DONT_ENCRYPT;
5135 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5136 sizeof(struct ethhdr) + len);
5140 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
5142 skb_put_data(skb, buf, len);
5144 ehdr = skb_push(skb, sizeof(struct ethhdr));
5145 memcpy(ehdr->h_dest, dest, ETH_ALEN);
5146 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
5147 ehdr->h_proto = proto;
5150 skb->protocol = htons(ETH_P_802_3);
5151 skb_reset_network_header(skb);
5152 skb_reset_mac_header(skb);
5155 __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags);
5161 int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
5162 const u8 *buf, size_t len)
5164 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5165 struct ieee80211_local *local = sdata->local;
5166 struct sk_buff *skb;
5168 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
5169 30 + /* header size */
5170 18); /* 11s header size */
5174 skb_reserve(skb, local->hw.extra_tx_headroom);
5175 skb_put_data(skb, buf, len);
5178 skb->protocol = htons(ETH_P_802_3);
5179 skb_reset_network_header(skb);
5180 skb_reset_mac_header(skb);
5183 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
5184 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP);