2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2018 Intel Corporation
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 * Transmit and frame generation functions.
17 #include <linux/kernel.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/if_vlan.h>
21 #include <linux/etherdevice.h>
22 #include <linux/bitmap.h>
23 #include <linux/rcupdate.h>
24 #include <linux/export.h>
25 #include <net/net_namespace.h>
26 #include <net/ieee80211_radiotap.h>
27 #include <net/cfg80211.h>
28 #include <net/mac80211.h>
29 #include <net/codel.h>
30 #include <net/codel_impl.h>
31 #include <asm/unaligned.h>
32 #include <net/fq_impl.h>
34 #include "ieee80211_i.h"
35 #include "driver-ops.h"
45 static inline void ieee80211_tx_stats(struct net_device
*dev
, u32 len
)
47 struct pcpu_sw_netstats
*tstats
= this_cpu_ptr(dev
->tstats
);
49 u64_stats_update_begin(&tstats
->syncp
);
51 tstats
->tx_bytes
+= len
;
52 u64_stats_update_end(&tstats
->syncp
);
55 static __le16
ieee80211_duration(struct ieee80211_tx_data
*tx
,
56 struct sk_buff
*skb
, int group_addr
,
59 int rate
, mrate
, erp
, dur
, i
, shift
= 0;
60 struct ieee80211_rate
*txrate
;
61 struct ieee80211_local
*local
= tx
->local
;
62 struct ieee80211_supported_band
*sband
;
63 struct ieee80211_hdr
*hdr
;
64 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
65 struct ieee80211_chanctx_conf
*chanctx_conf
;
68 /* assume HW handles this */
69 if (tx
->rate
.flags
& (IEEE80211_TX_RC_MCS
| IEEE80211_TX_RC_VHT_MCS
))
73 chanctx_conf
= rcu_dereference(tx
->sdata
->vif
.chanctx_conf
);
75 shift
= ieee80211_chandef_get_shift(&chanctx_conf
->def
);
76 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
81 if (WARN_ON_ONCE(tx
->rate
.idx
< 0))
84 sband
= local
->hw
.wiphy
->bands
[info
->band
];
85 txrate
= &sband
->bitrates
[tx
->rate
.idx
];
87 erp
= txrate
->flags
& IEEE80211_RATE_ERP_G
;
90 * data and mgmt (except PS Poll):
92 * - during contention period:
93 * if addr1 is group address: 0
94 * if more fragments = 0 and addr1 is individual address: time to
95 * transmit one ACK plus SIFS
96 * if more fragments = 1 and addr1 is individual address: time to
97 * transmit next fragment plus 2 x ACK plus 3 x SIFS
100 * - control response frame (CTS or ACK) shall be transmitted using the
101 * same rate as the immediately previous frame in the frame exchange
102 * sequence, if this rate belongs to the PHY mandatory rates, or else
103 * at the highest possible rate belonging to the PHY rates in the
106 hdr
= (struct ieee80211_hdr
*)skb
->data
;
107 if (ieee80211_is_ctl(hdr
->frame_control
)) {
108 /* TODO: These control frames are not currently sent by
109 * mac80211, but should they be implemented, this function
110 * needs to be updated to support duration field calculation.
112 * RTS: time needed to transmit pending data/mgmt frame plus
113 * one CTS frame plus one ACK frame plus 3 x SIFS
114 * CTS: duration of immediately previous RTS minus time
115 * required to transmit CTS and its SIFS
116 * ACK: 0 if immediately previous directed data/mgmt had
117 * more=0, with more=1 duration in ACK frame is duration
118 * from previous frame minus time needed to transmit ACK
120 * PS Poll: BIT(15) | BIT(14) | aid
126 if (0 /* FIX: data/mgmt during CFP */)
127 return cpu_to_le16(32768);
129 if (group_addr
) /* Group address as the destination - no ACK */
132 /* Individual destination address:
133 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
134 * CTS and ACK frames shall be transmitted using the highest rate in
135 * basic rate set that is less than or equal to the rate of the
136 * immediately previous frame and that is using the same modulation
137 * (CCK or OFDM). If no basic rate set matches with these requirements,
138 * the highest mandatory rate of the PHY that is less than or equal to
139 * the rate of the previous frame is used.
140 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
143 /* use lowest available if everything fails */
144 mrate
= sband
->bitrates
[0].bitrate
;
145 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
146 struct ieee80211_rate
*r
= &sband
->bitrates
[i
];
148 if (r
->bitrate
> txrate
->bitrate
)
151 if ((rate_flags
& r
->flags
) != rate_flags
)
154 if (tx
->sdata
->vif
.bss_conf
.basic_rates
& BIT(i
))
155 rate
= DIV_ROUND_UP(r
->bitrate
, 1 << shift
);
157 switch (sband
->band
) {
158 case NL80211_BAND_2GHZ
: {
160 if (tx
->sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
161 flag
= IEEE80211_RATE_MANDATORY_G
;
163 flag
= IEEE80211_RATE_MANDATORY_B
;
168 case NL80211_BAND_5GHZ
:
169 if (r
->flags
& IEEE80211_RATE_MANDATORY_A
)
172 case NL80211_BAND_60GHZ
:
173 /* TODO, for now fall through */
174 case NUM_NL80211_BANDS
:
180 /* No matching basic rate found; use highest suitable mandatory
182 rate
= DIV_ROUND_UP(mrate
, 1 << shift
);
185 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
186 if (ieee80211_is_data_qos(hdr
->frame_control
) &&
187 *(ieee80211_get_qos_ctl(hdr
)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK
)
190 /* Time needed to transmit ACK
191 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
192 * to closest integer */
193 dur
= ieee80211_frame_duration(sband
->band
, 10, rate
, erp
,
194 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
198 /* Frame is fragmented: duration increases with time needed to
199 * transmit next fragment plus ACK and 2 x SIFS. */
200 dur
*= 2; /* ACK + SIFS */
202 dur
+= ieee80211_frame_duration(sband
->band
, next_frag_len
,
203 txrate
->bitrate
, erp
,
204 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
208 return cpu_to_le16(dur
);
212 static ieee80211_tx_result debug_noinline
213 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data
*tx
)
215 struct ieee80211_local
*local
= tx
->local
;
216 struct ieee80211_if_managed
*ifmgd
;
217 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
219 /* driver doesn't support power save */
220 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
))
223 /* hardware does dynamic power save */
224 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
))
227 /* dynamic power save disabled */
228 if (local
->hw
.conf
.dynamic_ps_timeout
<= 0)
231 /* we are scanning, don't enable power save */
235 if (!local
->ps_sdata
)
238 /* No point if we're going to suspend */
239 if (local
->quiescing
)
242 /* dynamic ps is supported only in managed mode */
243 if (tx
->sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
246 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_OFFCHAN_TX_OK
))
249 ifmgd
= &tx
->sdata
->u
.mgd
;
252 * Don't wakeup from power save if u-apsd is enabled, voip ac has
253 * u-apsd enabled and the frame is in voip class. This effectively
254 * means that even if all access categories have u-apsd enabled, in
255 * practise u-apsd is only used with the voip ac. This is a
256 * workaround for the case when received voip class packets do not
257 * have correct qos tag for some reason, due the network or the
260 * Note: ifmgd->uapsd_queues access is racy here. If the value is
261 * changed via debugfs, user needs to reassociate manually to have
262 * everything in sync.
264 if ((ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
) &&
265 (ifmgd
->uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
) &&
266 skb_get_queue_mapping(tx
->skb
) == IEEE80211_AC_VO
)
269 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
270 ieee80211_stop_queues_by_reason(&local
->hw
,
271 IEEE80211_MAX_QUEUE_MAP
,
272 IEEE80211_QUEUE_STOP_REASON_PS
,
274 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
275 ieee80211_queue_work(&local
->hw
,
276 &local
->dynamic_ps_disable_work
);
279 /* Don't restart the timer if we're not disassociated */
280 if (!ifmgd
->associated
)
283 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
284 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
289 static ieee80211_tx_result debug_noinline
290 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data
*tx
)
293 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
294 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
297 if (unlikely(info
->flags
& IEEE80211_TX_CTL_INJECTED
))
300 if (unlikely(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
)) &&
301 test_bit(SDATA_STATE_OFFCHANNEL
, &tx
->sdata
->state
) &&
302 !ieee80211_is_probe_req(hdr
->frame_control
) &&
303 !ieee80211_is_nullfunc(hdr
->frame_control
))
305 * When software scanning only nullfunc frames (to notify
306 * the sleep state to the AP) and probe requests (for the
307 * active scan) are allowed, all other frames should not be
308 * sent and we should not get here, but if we do
309 * nonetheless, drop them to avoid sending them
310 * off-channel. See the link below and
311 * ieee80211_start_scan() for more.
313 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
317 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
)
320 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
323 if (tx
->flags
& IEEE80211_TX_PS_BUFFERED
)
327 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
329 if (likely(tx
->flags
& IEEE80211_TX_UNICAST
)) {
330 if (unlikely(!assoc
&&
331 ieee80211_is_data(hdr
->frame_control
))) {
332 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
333 sdata_info(tx
->sdata
,
334 "dropped data frame to not associated station %pM\n",
337 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
340 } else if (unlikely(ieee80211_is_data(hdr
->frame_control
) &&
341 ieee80211_vif_get_num_mcast_if(tx
->sdata
) == 0)) {
343 * No associated STAs - no need to send multicast
352 /* This function is called whenever the AP is about to exceed the maximum limit
353 * of buffered frames for power saving STAs. This situation should not really
354 * happen often during normal operation, so dropping the oldest buffered packet
355 * from each queue should be OK to make some room for new frames. */
356 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
358 int total
= 0, purged
= 0;
360 struct ieee80211_sub_if_data
*sdata
;
361 struct sta_info
*sta
;
363 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
366 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
367 ps
= &sdata
->u
.ap
.ps
;
368 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
369 ps
= &sdata
->u
.mesh
.ps
;
373 skb
= skb_dequeue(&ps
->bc_buf
);
376 ieee80211_free_txskb(&local
->hw
, skb
);
378 total
+= skb_queue_len(&ps
->bc_buf
);
382 * Drop one frame from each station from the lowest-priority
383 * AC that has frames at all.
385 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
388 for (ac
= IEEE80211_AC_BK
; ac
>= IEEE80211_AC_VO
; ac
--) {
389 skb
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
390 total
+= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
393 ieee80211_free_txskb(&local
->hw
, skb
);
399 local
->total_ps_buffered
= total
;
400 ps_dbg_hw(&local
->hw
, "PS buffers full - purged %d frames\n", purged
);
403 static ieee80211_tx_result
404 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data
*tx
)
406 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
407 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
411 * broadcast/multicast frame
413 * If any of the associated/peer stations is in power save mode,
414 * the frame is buffered to be sent after DTIM beacon frame.
415 * This is done either by the hardware or us.
418 /* powersaving STAs currently only in AP/VLAN/mesh mode */
419 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
420 tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
424 ps
= &tx
->sdata
->bss
->ps
;
425 } else if (ieee80211_vif_is_mesh(&tx
->sdata
->vif
)) {
426 ps
= &tx
->sdata
->u
.mesh
.ps
;
432 /* no buffering for ordered frames */
433 if (ieee80211_has_order(hdr
->frame_control
))
436 if (ieee80211_is_probe_req(hdr
->frame_control
))
439 if (ieee80211_hw_check(&tx
->local
->hw
, QUEUE_CONTROL
))
440 info
->hw_queue
= tx
->sdata
->vif
.cab_queue
;
442 /* no stations in PS mode and no buffered packets */
443 if (!atomic_read(&ps
->num_sta_ps
) && skb_queue_empty(&ps
->bc_buf
))
446 info
->flags
|= IEEE80211_TX_CTL_SEND_AFTER_DTIM
;
448 /* device releases frame after DTIM beacon */
449 if (!ieee80211_hw_check(&tx
->local
->hw
, HOST_BROADCAST_PS_BUFFERING
))
452 /* buffered in mac80211 */
453 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
454 purge_old_ps_buffers(tx
->local
);
456 if (skb_queue_len(&ps
->bc_buf
) >= AP_MAX_BC_BUFFER
) {
458 "BC TX buffer full - dropping the oldest frame\n");
459 ieee80211_free_txskb(&tx
->local
->hw
, skb_dequeue(&ps
->bc_buf
));
461 tx
->local
->total_ps_buffered
++;
463 skb_queue_tail(&ps
->bc_buf
, tx
->skb
);
468 static int ieee80211_use_mfp(__le16 fc
, struct sta_info
*sta
,
471 if (!ieee80211_is_mgmt(fc
))
474 if (sta
== NULL
|| !test_sta_flag(sta
, WLAN_STA_MFP
))
477 if (!ieee80211_is_robust_mgmt_frame(skb
))
483 static ieee80211_tx_result
484 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data
*tx
)
486 struct sta_info
*sta
= tx
->sta
;
487 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
488 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
489 struct ieee80211_local
*local
= tx
->local
;
494 if (unlikely((test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
495 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
496 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) &&
497 !(info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
))) {
498 int ac
= skb_get_queue_mapping(tx
->skb
);
500 if (ieee80211_is_mgmt(hdr
->frame_control
) &&
501 !ieee80211_is_bufferable_mmpdu(hdr
->frame_control
)) {
502 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
506 ps_dbg(sta
->sdata
, "STA %pM aid %d: PS buffer for AC %d\n",
507 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
508 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
509 purge_old_ps_buffers(tx
->local
);
511 /* sync with ieee80211_sta_ps_deliver_wakeup */
512 spin_lock(&sta
->ps_lock
);
514 * STA woke up the meantime and all the frames on ps_tx_buf have
515 * been queued to pending queue. No reordering can happen, go
516 * ahead and Tx the packet.
518 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
) &&
519 !test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) &&
520 !test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) {
521 spin_unlock(&sta
->ps_lock
);
525 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
526 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
528 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
530 ieee80211_free_txskb(&local
->hw
, old
);
532 tx
->local
->total_ps_buffered
++;
534 info
->control
.jiffies
= jiffies
;
535 info
->control
.vif
= &tx
->sdata
->vif
;
536 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
537 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
538 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
539 spin_unlock(&sta
->ps_lock
);
541 if (!timer_pending(&local
->sta_cleanup
))
542 mod_timer(&local
->sta_cleanup
,
543 round_jiffies(jiffies
+
544 STA_INFO_CLEANUP_INTERVAL
));
547 * We queued up some frames, so the TIM bit might
548 * need to be set, recalculate it.
550 sta_info_recalc_tim(sta
);
553 } else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
555 "STA %pM in PS mode, but polling/in SP -> send frame\n",
562 static ieee80211_tx_result debug_noinline
563 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
565 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
568 if (tx
->flags
& IEEE80211_TX_UNICAST
)
569 return ieee80211_tx_h_unicast_ps_buf(tx
);
571 return ieee80211_tx_h_multicast_ps_buf(tx
);
574 static ieee80211_tx_result debug_noinline
575 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
577 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
579 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
)) {
580 if (tx
->sdata
->control_port_no_encrypt
)
581 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
582 info
->control
.flags
|= IEEE80211_TX_CTRL_PORT_CTRL_PROTO
;
583 info
->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
589 static ieee80211_tx_result debug_noinline
590 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
592 struct ieee80211_key
*key
;
593 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
594 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
596 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
;
665 static ieee80211_tx_result debug_noinline
666 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data
*tx
)
668 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
669 struct ieee80211_hdr
*hdr
= (void *)tx
->skb
->data
;
670 struct ieee80211_supported_band
*sband
;
672 struct ieee80211_tx_rate_control txrc
;
673 struct ieee80211_sta_rates
*ratetbl
= NULL
;
676 memset(&txrc
, 0, sizeof(txrc
));
678 sband
= tx
->local
->hw
.wiphy
->bands
[info
->band
];
680 len
= min_t(u32
, tx
->skb
->len
+ FCS_LEN
,
681 tx
->local
->hw
.wiphy
->frag_threshold
);
683 /* set up the tx rate control struct we give the RC algo */
684 txrc
.hw
= &tx
->local
->hw
;
686 txrc
.bss_conf
= &tx
->sdata
->vif
.bss_conf
;
688 txrc
.reported_rate
.idx
= -1;
689 txrc
.rate_idx_mask
= tx
->sdata
->rc_rateidx_mask
[info
->band
];
691 if (tx
->sdata
->rc_has_mcs_mask
[info
->band
])
692 txrc
.rate_idx_mcs_mask
=
693 tx
->sdata
->rc_rateidx_mcs_mask
[info
->band
];
695 txrc
.bss
= (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
696 tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
||
697 tx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
||
698 tx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
);
700 /* set up RTS protection if desired */
701 if (len
> tx
->local
->hw
.wiphy
->rts_threshold
) {
705 info
->control
.use_rts
= txrc
.rts
;
706 info
->control
.use_cts_prot
= tx
->sdata
->vif
.bss_conf
.use_cts_prot
;
709 * Use short preamble if the BSS can handle it, but not for
710 * management frames unless we know the receiver can handle
711 * that -- the management frame might be to a station that
712 * just wants a probe response.
714 if (tx
->sdata
->vif
.bss_conf
.use_short_preamble
&&
715 (ieee80211_is_data(hdr
->frame_control
) ||
716 (tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_SHORT_PREAMBLE
))))
717 txrc
.short_preamble
= true;
719 info
->control
.short_preamble
= txrc
.short_preamble
;
721 /* don't ask rate control when rate already injected via radiotap */
722 if (info
->control
.flags
& IEEE80211_TX_CTRL_RATE_INJECT
)
726 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
729 * Lets not bother rate control if we're associated and cannot
730 * talk to the sta. This should not happen.
732 if (WARN(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
) && assoc
&&
733 !rate_usable_index_exists(sband
, &tx
->sta
->sta
),
734 "%s: Dropped data frame as no usable bitrate found while "
735 "scanning and associated. Target station: "
736 "%pM on %d GHz band\n",
737 tx
->sdata
->name
, hdr
->addr1
,
742 * If we're associated with the sta at this point we know we can at
743 * least send the frame at the lowest bit rate.
745 rate_control_get_rate(tx
->sdata
, tx
->sta
, &txrc
);
747 if (tx
->sta
&& !info
->control
.skip_table
)
748 ratetbl
= rcu_dereference(tx
->sta
->sta
.rates
);
750 if (unlikely(info
->control
.rates
[0].idx
< 0)) {
752 struct ieee80211_tx_rate rate
= {
753 .idx
= ratetbl
->rate
[0].idx
,
754 .flags
= ratetbl
->rate
[0].flags
,
755 .count
= ratetbl
->rate
[0].count
758 if (ratetbl
->rate
[0].idx
< 0)
766 tx
->rate
= info
->control
.rates
[0];
769 if (txrc
.reported_rate
.idx
< 0) {
770 txrc
.reported_rate
= tx
->rate
;
771 if (tx
->sta
&& ieee80211_is_data(hdr
->frame_control
))
772 tx
->sta
->tx_stats
.last_rate
= txrc
.reported_rate
;
774 tx
->sta
->tx_stats
.last_rate
= txrc
.reported_rate
;
779 if (unlikely(!info
->control
.rates
[0].count
))
780 info
->control
.rates
[0].count
= 1;
782 if (WARN_ON_ONCE((info
->control
.rates
[0].count
> 1) &&
783 (info
->flags
& IEEE80211_TX_CTL_NO_ACK
)))
784 info
->control
.rates
[0].count
= 1;
789 static __le16
ieee80211_tx_next_seq(struct sta_info
*sta
, int tid
)
791 u16
*seq
= &sta
->tid_seq
[tid
];
792 __le16 ret
= cpu_to_le16(*seq
);
794 /* Increase the sequence number. */
795 *seq
= (*seq
+ 0x10) & IEEE80211_SCTL_SEQ
;
800 static ieee80211_tx_result debug_noinline
801 ieee80211_tx_h_sequence(struct ieee80211_tx_data
*tx
)
803 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
804 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
808 * Packet injection may want to control the sequence
809 * number, if we have no matching interface then we
810 * neither assign one ourselves nor ask the driver to.
812 if (unlikely(info
->control
.vif
->type
== NL80211_IFTYPE_MONITOR
))
815 if (unlikely(ieee80211_is_ctl(hdr
->frame_control
)))
818 if (ieee80211_hdrlen(hdr
->frame_control
) < 24)
821 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
825 * Anything but QoS data that has a sequence number field
826 * (is long enough) gets a sequence number from the global
827 * counter. QoS data frames with a multicast destination
828 * also use the global counter (802.11-2012 9.3.2.10).
830 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
831 is_multicast_ether_addr(hdr
->addr1
)) {
832 if (tx
->flags
& IEEE80211_TX_NO_SEQNO
)
834 /* driver should assign sequence number */
835 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
836 /* for pure STA mode without beacons, we can do it */
837 hdr
->seq_ctrl
= cpu_to_le16(tx
->sdata
->sequence_number
);
838 tx
->sdata
->sequence_number
+= 0x10;
840 tx
->sta
->tx_stats
.msdu
[IEEE80211_NUM_TIDS
]++;
845 * This should be true for injected/management frames only, for
846 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
847 * above since they are not QoS-data frames.
852 /* include per-STA, per-TID sequence counter */
853 tid
= ieee80211_get_tid(hdr
);
854 tx
->sta
->tx_stats
.msdu
[tid
]++;
856 hdr
->seq_ctrl
= ieee80211_tx_next_seq(tx
->sta
, tid
);
861 static int ieee80211_fragment(struct ieee80211_tx_data
*tx
,
862 struct sk_buff
*skb
, int hdrlen
,
865 struct ieee80211_local
*local
= tx
->local
;
866 struct ieee80211_tx_info
*info
;
868 int per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
869 int pos
= hdrlen
+ per_fragm
;
870 int rem
= skb
->len
- hdrlen
- per_fragm
;
872 if (WARN_ON(rem
< 0))
875 /* first fragment was already added to queue by caller */
878 int fraglen
= per_fragm
;
883 tmp
= dev_alloc_skb(local
->tx_headroom
+
885 tx
->sdata
->encrypt_headroom
+
886 IEEE80211_ENCRYPT_TAILROOM
);
890 __skb_queue_tail(&tx
->skbs
, tmp
);
893 local
->tx_headroom
+ tx
->sdata
->encrypt_headroom
);
895 /* copy control information */
896 memcpy(tmp
->cb
, skb
->cb
, sizeof(tmp
->cb
));
898 info
= IEEE80211_SKB_CB(tmp
);
899 info
->flags
&= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT
|
900 IEEE80211_TX_CTL_FIRST_FRAGMENT
);
903 info
->flags
|= IEEE80211_TX_CTL_MORE_FRAMES
;
905 skb_copy_queue_mapping(tmp
, skb
);
906 tmp
->priority
= skb
->priority
;
909 /* copy header and data */
910 skb_put_data(tmp
, skb
->data
, hdrlen
);
911 skb_put_data(tmp
, skb
->data
+ pos
, fraglen
);
916 /* adjust first fragment's length */
917 skb_trim(skb
, hdrlen
+ per_fragm
);
921 static ieee80211_tx_result debug_noinline
922 ieee80211_tx_h_fragment(struct ieee80211_tx_data
*tx
)
924 struct sk_buff
*skb
= tx
->skb
;
925 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
926 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
927 int frag_threshold
= tx
->local
->hw
.wiphy
->frag_threshold
;
931 /* no matter what happens, tx->skb moves to tx->skbs */
932 __skb_queue_tail(&tx
->skbs
, skb
);
935 if (info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)
938 if (ieee80211_hw_check(&tx
->local
->hw
, SUPPORTS_TX_FRAG
))
942 * Warn when submitting a fragmented A-MPDU frame and drop it.
943 * This scenario is handled in ieee80211_tx_prepare but extra
944 * caution taken here as fragmented ampdu may cause Tx stop.
946 if (WARN_ON(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
949 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
951 /* internal error, why isn't DONTFRAG set? */
952 if (WARN_ON(skb
->len
+ FCS_LEN
<= frag_threshold
))
956 * Now fragment the frame. This will allocate all the fragments and
957 * chain them (using skb as the first fragment) to skb->next.
958 * During transmission, we will remove the successfully transmitted
959 * fragments from this list. When the low-level driver rejects one
960 * of the fragments then we will simply pretend to accept the skb
961 * but store it away as pending.
963 if (ieee80211_fragment(tx
, skb
, hdrlen
, frag_threshold
))
966 /* update duration/seq/flags of fragments */
969 skb_queue_walk(&tx
->skbs
, skb
) {
970 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
972 hdr
= (void *)skb
->data
;
973 info
= IEEE80211_SKB_CB(skb
);
975 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
976 hdr
->frame_control
|= morefrags
;
978 * No multi-rate retries for fragmented frames, that
979 * would completely throw off the NAV at other STAs.
981 info
->control
.rates
[1].idx
= -1;
982 info
->control
.rates
[2].idx
= -1;
983 info
->control
.rates
[3].idx
= -1;
984 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 4);
985 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
987 hdr
->frame_control
&= ~morefrags
;
989 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
996 static ieee80211_tx_result debug_noinline
997 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
1005 skb_queue_walk(&tx
->skbs
, skb
) {
1006 ac
= skb_get_queue_mapping(skb
);
1007 tx
->sta
->tx_stats
.bytes
[ac
] += skb
->len
;
1010 tx
->sta
->tx_stats
.packets
[ac
]++;
1015 static ieee80211_tx_result debug_noinline
1016 ieee80211_tx_h_encrypt(struct ieee80211_tx_data
*tx
)
1021 switch (tx
->key
->conf
.cipher
) {
1022 case WLAN_CIPHER_SUITE_WEP40
:
1023 case WLAN_CIPHER_SUITE_WEP104
:
1024 return ieee80211_crypto_wep_encrypt(tx
);
1025 case WLAN_CIPHER_SUITE_TKIP
:
1026 return ieee80211_crypto_tkip_encrypt(tx
);
1027 case WLAN_CIPHER_SUITE_CCMP
:
1028 return ieee80211_crypto_ccmp_encrypt(
1029 tx
, IEEE80211_CCMP_MIC_LEN
);
1030 case WLAN_CIPHER_SUITE_CCMP_256
:
1031 return ieee80211_crypto_ccmp_encrypt(
1032 tx
, IEEE80211_CCMP_256_MIC_LEN
);
1033 case WLAN_CIPHER_SUITE_AES_CMAC
:
1034 return ieee80211_crypto_aes_cmac_encrypt(tx
);
1035 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
1036 return ieee80211_crypto_aes_cmac_256_encrypt(tx
);
1037 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
1038 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
1039 return ieee80211_crypto_aes_gmac_encrypt(tx
);
1040 case WLAN_CIPHER_SUITE_GCMP
:
1041 case WLAN_CIPHER_SUITE_GCMP_256
:
1042 return ieee80211_crypto_gcmp_encrypt(tx
);
1044 return ieee80211_crypto_hw_encrypt(tx
);
1050 static ieee80211_tx_result debug_noinline
1051 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data
*tx
)
1053 struct sk_buff
*skb
;
1054 struct ieee80211_hdr
*hdr
;
1058 skb_queue_walk(&tx
->skbs
, skb
) {
1059 hdr
= (void *) skb
->data
;
1060 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
)))
1061 break; /* must not overwrite AID */
1062 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1063 struct sk_buff
*next
= skb_queue_next(&tx
->skbs
, skb
);
1064 next_len
= next
->len
;
1067 group_addr
= is_multicast_ether_addr(hdr
->addr1
);
1070 ieee80211_duration(tx
, skb
, group_addr
, next_len
);
1076 /* actual transmit path */
1078 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data
*tx
,
1079 struct sk_buff
*skb
,
1080 struct ieee80211_tx_info
*info
,
1081 struct tid_ampdu_tx
*tid_tx
,
1084 bool queued
= false;
1085 bool reset_agg_timer
= false;
1086 struct sk_buff
*purge_skb
= NULL
;
1088 if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1089 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1090 reset_agg_timer
= true;
1091 } else if (test_bit(HT_AGG_STATE_WANT_START
, &tid_tx
->state
)) {
1093 * nothing -- this aggregation session is being started
1094 * but that might still fail with the driver
1096 } else if (!tx
->sta
->sta
.txq
[tid
]) {
1097 spin_lock(&tx
->sta
->lock
);
1099 * Need to re-check now, because we may get here
1101 * 1) in the window during which the setup is actually
1102 * already done, but not marked yet because not all
1103 * packets are spliced over to the driver pending
1104 * queue yet -- if this happened we acquire the lock
1105 * either before or after the splice happens, but
1106 * need to recheck which of these cases happened.
1108 * 2) during session teardown, if the OPERATIONAL bit
1109 * was cleared due to the teardown but the pointer
1110 * hasn't been assigned NULL yet (or we loaded it
1111 * before it was assigned) -- in this case it may
1112 * now be NULL which means we should just let the
1113 * packet pass through because splicing the frames
1114 * back is already done.
1116 tid_tx
= rcu_dereference_protected_tid_tx(tx
->sta
, tid
);
1119 /* do nothing, let packet pass through */
1120 } else if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1121 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1122 reset_agg_timer
= true;
1125 if (info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
) {
1126 clear_sta_flag(tx
->sta
, WLAN_STA_SP
);
1127 ps_dbg(tx
->sta
->sdata
,
1128 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1129 tx
->sta
->sta
.addr
, tx
->sta
->sta
.aid
);
1131 info
->control
.vif
= &tx
->sdata
->vif
;
1132 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1133 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
1134 __skb_queue_tail(&tid_tx
->pending
, skb
);
1135 if (skb_queue_len(&tid_tx
->pending
) > STA_MAX_TX_BUFFER
)
1136 purge_skb
= __skb_dequeue(&tid_tx
->pending
);
1138 spin_unlock(&tx
->sta
->lock
);
1141 ieee80211_free_txskb(&tx
->local
->hw
, purge_skb
);
1144 /* reset session timer */
1145 if (reset_agg_timer
)
1146 tid_tx
->last_tx
= jiffies
;
1153 * pass %NULL for the station if unknown, a valid pointer if known
1154 * or an ERR_PTR() if the station is known not to exist
1156 static ieee80211_tx_result
1157 ieee80211_tx_prepare(struct ieee80211_sub_if_data
*sdata
,
1158 struct ieee80211_tx_data
*tx
,
1159 struct sta_info
*sta
, struct sk_buff
*skb
)
1161 struct ieee80211_local
*local
= sdata
->local
;
1162 struct ieee80211_hdr
*hdr
;
1163 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1166 memset(tx
, 0, sizeof(*tx
));
1170 __skb_queue_head_init(&tx
->skbs
);
1173 * If this flag is set to true anywhere, and we get here,
1174 * we are doing the needed processing, so remove the flag
1177 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1179 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1185 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1186 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1187 if (!tx
->sta
&& sdata
->wdev
.use_4addr
)
1189 } else if (info
->flags
& (IEEE80211_TX_INTFL_NL80211_FRAME_TX
|
1190 IEEE80211_TX_CTL_INJECTED
) ||
1191 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1192 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1194 if (!tx
->sta
&& !is_multicast_ether_addr(hdr
->addr1
))
1195 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1198 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1199 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1200 ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
) &&
1201 !ieee80211_hw_check(&local
->hw
, TX_AMPDU_SETUP_IN_HW
)) {
1202 struct tid_ampdu_tx
*tid_tx
;
1204 tid
= ieee80211_get_tid(hdr
);
1206 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1210 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1213 if (unlikely(queued
))
1218 if (is_multicast_ether_addr(hdr
->addr1
)) {
1219 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1220 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1222 tx
->flags
|= IEEE80211_TX_UNICAST
;
1224 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1225 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1226 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1227 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1228 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1232 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1233 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
)) {
1234 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1235 ieee80211_check_fast_xmit(tx
->sta
);
1238 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1243 static struct txq_info
*ieee80211_get_txq(struct ieee80211_local
*local
,
1244 struct ieee80211_vif
*vif
,
1245 struct sta_info
*sta
,
1246 struct sk_buff
*skb
)
1248 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1249 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1250 struct ieee80211_txq
*txq
= NULL
;
1252 if ((info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
) ||
1253 (info
->control
.flags
& IEEE80211_TX_CTRL_PS_RESPONSE
))
1256 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
))) {
1257 if ((!ieee80211_is_mgmt(hdr
->frame_control
) ||
1258 ieee80211_is_bufferable_mmpdu(hdr
->frame_control
) ||
1259 vif
->type
== NL80211_IFTYPE_STATION
) &&
1260 sta
&& sta
->uploaded
) {
1262 * This will be NULL if the driver didn't set the
1263 * opt-in hardware flag.
1265 txq
= sta
->sta
.txq
[IEEE80211_NUM_TIDS
];
1268 u8 tid
= skb
->priority
& IEEE80211_QOS_CTL_TID_MASK
;
1273 txq
= sta
->sta
.txq
[tid
];
1281 return to_txq_info(txq
);
1284 static void ieee80211_set_skb_enqueue_time(struct sk_buff
*skb
)
1286 IEEE80211_SKB_CB(skb
)->control
.enqueue_time
= codel_get_time();
1289 static u32
codel_skb_len_func(const struct sk_buff
*skb
)
1294 static codel_time_t
codel_skb_time_func(const struct sk_buff
*skb
)
1296 const struct ieee80211_tx_info
*info
;
1298 info
= (const struct ieee80211_tx_info
*)skb
->cb
;
1299 return info
->control
.enqueue_time
;
1302 static struct sk_buff
*codel_dequeue_func(struct codel_vars
*cvars
,
1305 struct ieee80211_local
*local
;
1306 struct txq_info
*txqi
;
1308 struct fq_flow
*flow
;
1311 local
= vif_to_sdata(txqi
->txq
.vif
)->local
;
1314 if (cvars
== &txqi
->def_cvars
)
1315 flow
= &txqi
->def_flow
;
1317 flow
= &fq
->flows
[cvars
- local
->cvars
];
1319 return fq_flow_dequeue(fq
, flow
);
1322 static void codel_drop_func(struct sk_buff
*skb
,
1325 struct ieee80211_local
*local
;
1326 struct ieee80211_hw
*hw
;
1327 struct txq_info
*txqi
;
1330 local
= vif_to_sdata(txqi
->txq
.vif
)->local
;
1333 ieee80211_free_txskb(hw
, skb
);
1336 static struct sk_buff
*fq_tin_dequeue_func(struct fq
*fq
,
1338 struct fq_flow
*flow
)
1340 struct ieee80211_local
*local
;
1341 struct txq_info
*txqi
;
1342 struct codel_vars
*cvars
;
1343 struct codel_params
*cparams
;
1344 struct codel_stats
*cstats
;
1346 local
= container_of(fq
, struct ieee80211_local
, fq
);
1347 txqi
= container_of(tin
, struct txq_info
, tin
);
1348 cstats
= &txqi
->cstats
;
1350 if (txqi
->txq
.sta
) {
1351 struct sta_info
*sta
= container_of(txqi
->txq
.sta
,
1352 struct sta_info
, sta
);
1353 cparams
= &sta
->cparams
;
1355 cparams
= &local
->cparams
;
1358 if (flow
== &txqi
->def_flow
)
1359 cvars
= &txqi
->def_cvars
;
1361 cvars
= &local
->cvars
[flow
- fq
->flows
];
1363 return codel_dequeue(txqi
,
1369 codel_skb_time_func
,
1371 codel_dequeue_func
);
1374 static void fq_skb_free_func(struct fq
*fq
,
1376 struct fq_flow
*flow
,
1377 struct sk_buff
*skb
)
1379 struct ieee80211_local
*local
;
1381 local
= container_of(fq
, struct ieee80211_local
, fq
);
1382 ieee80211_free_txskb(&local
->hw
, skb
);
1385 static struct fq_flow
*fq_flow_get_default_func(struct fq
*fq
,
1388 struct sk_buff
*skb
)
1390 struct txq_info
*txqi
;
1392 txqi
= container_of(tin
, struct txq_info
, tin
);
1393 return &txqi
->def_flow
;
1396 static void ieee80211_txq_enqueue(struct ieee80211_local
*local
,
1397 struct txq_info
*txqi
,
1398 struct sk_buff
*skb
)
1400 struct fq
*fq
= &local
->fq
;
1401 struct fq_tin
*tin
= &txqi
->tin
;
1403 ieee80211_set_skb_enqueue_time(skb
);
1404 fq_tin_enqueue(fq
, tin
, skb
,
1406 fq_flow_get_default_func
);
1409 static bool fq_vlan_filter_func(struct fq
*fq
, struct fq_tin
*tin
,
1410 struct fq_flow
*flow
, struct sk_buff
*skb
,
1413 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1415 return info
->control
.vif
== data
;
1418 void ieee80211_txq_remove_vlan(struct ieee80211_local
*local
,
1419 struct ieee80211_sub_if_data
*sdata
)
1421 struct fq
*fq
= &local
->fq
;
1422 struct txq_info
*txqi
;
1424 struct ieee80211_sub_if_data
*ap
;
1426 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
))
1429 ap
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
, u
.ap
);
1434 txqi
= to_txq_info(ap
->vif
.txq
);
1437 spin_lock_bh(&fq
->lock
);
1438 fq_tin_filter(fq
, tin
, fq_vlan_filter_func
, &sdata
->vif
,
1440 spin_unlock_bh(&fq
->lock
);
1443 void ieee80211_txq_init(struct ieee80211_sub_if_data
*sdata
,
1444 struct sta_info
*sta
,
1445 struct txq_info
*txqi
, int tid
)
1447 fq_tin_init(&txqi
->tin
);
1448 fq_flow_init(&txqi
->def_flow
);
1449 codel_vars_init(&txqi
->def_cvars
);
1450 codel_stats_init(&txqi
->cstats
);
1451 __skb_queue_head_init(&txqi
->frags
);
1453 txqi
->txq
.vif
= &sdata
->vif
;
1456 sdata
->vif
.txq
= &txqi
->txq
;
1458 txqi
->txq
.ac
= IEEE80211_AC_BE
;
1463 if (tid
== IEEE80211_NUM_TIDS
) {
1464 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
1465 /* Drivers need to opt in to the management MPDU TXQ */
1466 if (!ieee80211_hw_check(&sdata
->local
->hw
,
1469 } else if (!ieee80211_hw_check(&sdata
->local
->hw
,
1471 /* Drivers need to opt in to the bufferable MMPDU TXQ */
1474 txqi
->txq
.ac
= IEEE80211_AC_VO
;
1476 txqi
->txq
.ac
= ieee80211_ac_from_tid(tid
);
1479 txqi
->txq
.sta
= &sta
->sta
;
1480 txqi
->txq
.tid
= tid
;
1481 sta
->sta
.txq
[tid
] = &txqi
->txq
;
1484 void ieee80211_txq_purge(struct ieee80211_local
*local
,
1485 struct txq_info
*txqi
)
1487 struct fq
*fq
= &local
->fq
;
1488 struct fq_tin
*tin
= &txqi
->tin
;
1490 fq_tin_reset(fq
, tin
, fq_skb_free_func
);
1491 ieee80211_purge_tx_queue(&local
->hw
, &txqi
->frags
);
1494 void ieee80211_txq_set_params(struct ieee80211_local
*local
)
1496 if (local
->hw
.wiphy
->txq_limit
)
1497 local
->fq
.limit
= local
->hw
.wiphy
->txq_limit
;
1499 local
->hw
.wiphy
->txq_limit
= local
->fq
.limit
;
1501 if (local
->hw
.wiphy
->txq_memory_limit
)
1502 local
->fq
.memory_limit
= local
->hw
.wiphy
->txq_memory_limit
;
1504 local
->hw
.wiphy
->txq_memory_limit
= local
->fq
.memory_limit
;
1506 if (local
->hw
.wiphy
->txq_quantum
)
1507 local
->fq
.quantum
= local
->hw
.wiphy
->txq_quantum
;
1509 local
->hw
.wiphy
->txq_quantum
= local
->fq
.quantum
;
1512 int ieee80211_txq_setup_flows(struct ieee80211_local
*local
)
1514 struct fq
*fq
= &local
->fq
;
1517 bool supp_vht
= false;
1518 enum nl80211_band band
;
1520 if (!local
->ops
->wake_tx_queue
)
1523 ret
= fq_init(fq
, 4096);
1528 * If the hardware doesn't support VHT, it is safe to limit the maximum
1529 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1531 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
1532 struct ieee80211_supported_band
*sband
;
1534 sband
= local
->hw
.wiphy
->bands
[band
];
1538 supp_vht
= supp_vht
|| sband
->vht_cap
.vht_supported
;
1542 fq
->memory_limit
= 4 << 20; /* 4 Mbytes */
1544 codel_params_init(&local
->cparams
);
1545 local
->cparams
.interval
= MS2TIME(100);
1546 local
->cparams
.target
= MS2TIME(20);
1547 local
->cparams
.ecn
= true;
1549 local
->cvars
= kcalloc(fq
->flows_cnt
, sizeof(local
->cvars
[0]),
1551 if (!local
->cvars
) {
1552 spin_lock_bh(&fq
->lock
);
1553 fq_reset(fq
, fq_skb_free_func
);
1554 spin_unlock_bh(&fq
->lock
);
1558 for (i
= 0; i
< fq
->flows_cnt
; i
++)
1559 codel_vars_init(&local
->cvars
[i
]);
1561 ieee80211_txq_set_params(local
);
1566 void ieee80211_txq_teardown_flows(struct ieee80211_local
*local
)
1568 struct fq
*fq
= &local
->fq
;
1570 if (!local
->ops
->wake_tx_queue
)
1573 kfree(local
->cvars
);
1574 local
->cvars
= NULL
;
1576 spin_lock_bh(&fq
->lock
);
1577 fq_reset(fq
, fq_skb_free_func
);
1578 spin_unlock_bh(&fq
->lock
);
1581 static bool ieee80211_queue_skb(struct ieee80211_local
*local
,
1582 struct ieee80211_sub_if_data
*sdata
,
1583 struct sta_info
*sta
,
1584 struct sk_buff
*skb
)
1586 struct fq
*fq
= &local
->fq
;
1587 struct ieee80211_vif
*vif
;
1588 struct txq_info
*txqi
;
1590 if (!local
->ops
->wake_tx_queue
||
1591 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1594 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1595 sdata
= container_of(sdata
->bss
,
1596 struct ieee80211_sub_if_data
, u
.ap
);
1599 txqi
= ieee80211_get_txq(local
, vif
, sta
, skb
);
1604 spin_lock_bh(&fq
->lock
);
1605 ieee80211_txq_enqueue(local
, txqi
, skb
);
1606 spin_unlock_bh(&fq
->lock
);
1608 drv_wake_tx_queue(local
, txqi
);
1613 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1614 struct ieee80211_vif
*vif
,
1615 struct ieee80211_sta
*sta
,
1616 struct sk_buff_head
*skbs
,
1619 struct ieee80211_tx_control control
= {};
1620 struct sk_buff
*skb
, *tmp
;
1621 unsigned long flags
;
1623 skb_queue_walk_safe(skbs
, skb
, tmp
) {
1624 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1625 int q
= info
->hw_queue
;
1627 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1628 if (WARN_ON_ONCE(q
>= local
->hw
.queues
)) {
1629 __skb_unlink(skb
, skbs
);
1630 ieee80211_free_txskb(&local
->hw
, skb
);
1635 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1636 if (local
->queue_stop_reasons
[q
] ||
1637 (!txpending
&& !skb_queue_empty(&local
->pending
[q
]))) {
1638 if (unlikely(info
->flags
&
1639 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
)) {
1640 if (local
->queue_stop_reasons
[q
] &
1641 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL
)) {
1643 * Drop off-channel frames if queues
1644 * are stopped for any reason other
1645 * than off-channel operation. Never
1648 spin_unlock_irqrestore(
1649 &local
->queue_stop_reason_lock
,
1651 ieee80211_purge_tx_queue(&local
->hw
,
1658 * Since queue is stopped, queue up frames for
1659 * later transmission from the tx-pending
1660 * tasklet when the queue is woken again.
1663 skb_queue_splice_init(skbs
,
1664 &local
->pending
[q
]);
1666 skb_queue_splice_tail_init(skbs
,
1667 &local
->pending
[q
]);
1669 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1674 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1676 info
->control
.vif
= vif
;
1679 __skb_unlink(skb
, skbs
);
1680 drv_tx(local
, &control
, skb
);
1687 * Returns false if the frame couldn't be transmitted but was queued instead.
1689 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1690 struct sk_buff_head
*skbs
, int led_len
,
1691 struct sta_info
*sta
, bool txpending
)
1693 struct ieee80211_tx_info
*info
;
1694 struct ieee80211_sub_if_data
*sdata
;
1695 struct ieee80211_vif
*vif
;
1696 struct ieee80211_sta
*pubsta
;
1697 struct sk_buff
*skb
;
1701 if (WARN_ON(skb_queue_empty(skbs
)))
1704 skb
= skb_peek(skbs
);
1705 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1706 info
= IEEE80211_SKB_CB(skb
);
1707 sdata
= vif_to_sdata(info
->control
.vif
);
1708 if (sta
&& !sta
->uploaded
)
1716 switch (sdata
->vif
.type
) {
1717 case NL80211_IFTYPE_MONITOR
:
1718 if (sdata
->u
.mntr
.flags
& MONITOR_FLAG_ACTIVE
) {
1722 sdata
= rcu_dereference(local
->monitor_sdata
);
1726 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1727 } else if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
)) {
1728 ieee80211_purge_tx_queue(&local
->hw
, skbs
);
1733 case NL80211_IFTYPE_AP_VLAN
:
1734 sdata
= container_of(sdata
->bss
,
1735 struct ieee80211_sub_if_data
, u
.ap
);
1742 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1745 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1747 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1753 * Invoke TX handlers, return 0 on success and non-zero if the
1754 * frame was dropped or queued.
1756 * The handlers are split into an early and late part. The latter is everything
1757 * that can be sensitive to reordering, and will be deferred to after packets
1758 * are dequeued from the intermediate queues (when they are enabled).
1760 static int invoke_tx_handlers_early(struct ieee80211_tx_data
*tx
)
1762 ieee80211_tx_result res
= TX_DROP
;
1764 #define CALL_TXH(txh) \
1767 if (res != TX_CONTINUE) \
1771 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1772 CALL_TXH(ieee80211_tx_h_check_assoc
);
1773 CALL_TXH(ieee80211_tx_h_ps_buf
);
1774 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1775 CALL_TXH(ieee80211_tx_h_select_key
);
1776 if (!ieee80211_hw_check(&tx
->local
->hw
, HAS_RATE_CONTROL
))
1777 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1780 if (unlikely(res
== TX_DROP
)) {
1781 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1783 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1785 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1787 } else if (unlikely(res
== TX_QUEUED
)) {
1788 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1796 * Late handlers can be called while the sta lock is held. Handlers that can
1797 * cause packets to be generated will cause deadlock!
1799 static int invoke_tx_handlers_late(struct ieee80211_tx_data
*tx
)
1801 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1802 ieee80211_tx_result res
= TX_CONTINUE
;
1804 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1805 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1810 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1811 CALL_TXH(ieee80211_tx_h_sequence
);
1812 CALL_TXH(ieee80211_tx_h_fragment
);
1813 /* handlers after fragment must be aware of tx info fragmentation! */
1814 CALL_TXH(ieee80211_tx_h_stats
);
1815 CALL_TXH(ieee80211_tx_h_encrypt
);
1816 if (!ieee80211_hw_check(&tx
->local
->hw
, HAS_RATE_CONTROL
))
1817 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1821 if (unlikely(res
== TX_DROP
)) {
1822 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1824 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1826 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1828 } else if (unlikely(res
== TX_QUEUED
)) {
1829 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1836 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1838 int r
= invoke_tx_handlers_early(tx
);
1842 return invoke_tx_handlers_late(tx
);
1845 bool ieee80211_tx_prepare_skb(struct ieee80211_hw
*hw
,
1846 struct ieee80211_vif
*vif
, struct sk_buff
*skb
,
1847 int band
, struct ieee80211_sta
**sta
)
1849 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1850 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1851 struct ieee80211_tx_data tx
;
1852 struct sk_buff
*skb2
;
1854 if (ieee80211_tx_prepare(sdata
, &tx
, NULL
, skb
) == TX_DROP
)
1858 info
->control
.vif
= vif
;
1859 info
->hw_queue
= vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1861 if (invoke_tx_handlers(&tx
))
1866 *sta
= &tx
.sta
->sta
;
1871 /* this function isn't suitable for fragmented data frames */
1872 skb2
= __skb_dequeue(&tx
.skbs
);
1873 if (WARN_ON(skb2
!= skb
|| !skb_queue_empty(&tx
.skbs
))) {
1874 ieee80211_free_txskb(hw
, skb2
);
1875 ieee80211_purge_tx_queue(hw
, &tx
.skbs
);
1881 EXPORT_SYMBOL(ieee80211_tx_prepare_skb
);
1884 * Returns false if the frame couldn't be transmitted but was queued instead.
1886 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1887 struct sta_info
*sta
, struct sk_buff
*skb
,
1888 bool txpending
, u32 txdata_flags
)
1890 struct ieee80211_local
*local
= sdata
->local
;
1891 struct ieee80211_tx_data tx
;
1892 ieee80211_tx_result res_prepare
;
1893 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1897 if (unlikely(skb
->len
< 10)) {
1902 /* initialises tx */
1904 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, sta
, skb
);
1906 tx
.flags
|= txdata_flags
;
1908 if (unlikely(res_prepare
== TX_DROP
)) {
1909 ieee80211_free_txskb(&local
->hw
, skb
);
1911 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1915 /* set up hw_queue value early */
1916 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1917 !ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
1919 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1921 if (invoke_tx_handlers_early(&tx
))
1924 if (ieee80211_queue_skb(local
, sdata
, tx
.sta
, tx
.skb
))
1927 if (!invoke_tx_handlers_late(&tx
))
1928 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1934 /* device xmit handlers */
1936 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1937 struct sk_buff
*skb
,
1938 int head_need
, bool may_encrypt
)
1940 struct ieee80211_local
*local
= sdata
->local
;
1941 struct ieee80211_hdr
*hdr
;
1945 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1946 enc_tailroom
= may_encrypt
&&
1947 (sdata
->crypto_tx_tailroom_needed_cnt
||
1948 ieee80211_is_mgmt(hdr
->frame_control
));
1951 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1952 tail_need
-= skb_tailroom(skb
);
1953 tail_need
= max_t(int, tail_need
, 0);
1956 if (skb_cloned(skb
) &&
1957 (!ieee80211_hw_check(&local
->hw
, SUPPORTS_CLONED_SKBS
) ||
1958 !skb_clone_writable(skb
, ETH_HLEN
) || enc_tailroom
))
1959 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1960 else if (head_need
|| tail_need
)
1961 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1965 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1966 wiphy_debug(local
->hw
.wiphy
,
1967 "failed to reallocate TX buffer\n");
1974 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
,
1975 struct sta_info
*sta
, struct sk_buff
*skb
,
1978 struct ieee80211_local
*local
= sdata
->local
;
1979 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1980 struct ieee80211_hdr
*hdr
;
1984 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1986 headroom
= local
->tx_headroom
;
1988 headroom
+= sdata
->encrypt_headroom
;
1989 headroom
-= skb_headroom(skb
);
1990 headroom
= max_t(int, 0, headroom
);
1992 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1993 ieee80211_free_txskb(&local
->hw
, skb
);
1997 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1998 info
->control
.vif
= &sdata
->vif
;
2000 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2001 if (ieee80211_is_data(hdr
->frame_control
) &&
2002 is_unicast_ether_addr(hdr
->addr1
)) {
2003 if (mesh_nexthop_resolve(sdata
, skb
))
2004 return; /* skb queued: don't free */
2006 ieee80211_mps_set_frame_flags(sdata
, NULL
, hdr
);
2010 ieee80211_set_qos_hdr(sdata
, skb
);
2011 ieee80211_tx(sdata
, sta
, skb
, false, txdata_flags
);
2014 static bool ieee80211_parse_tx_radiotap(struct ieee80211_local
*local
,
2015 struct sk_buff
*skb
)
2017 struct ieee80211_radiotap_iterator iterator
;
2018 struct ieee80211_radiotap_header
*rthdr
=
2019 (struct ieee80211_radiotap_header
*) skb
->data
;
2020 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2021 struct ieee80211_supported_band
*sband
=
2022 local
->hw
.wiphy
->bands
[info
->band
];
2023 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
2027 bool rate_found
= false;
2028 u8 rate_retries
= 0;
2030 u8 mcs_known
, mcs_flags
, mcs_bw
;
2032 u8 vht_mcs
= 0, vht_nss
= 0;
2035 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
2036 IEEE80211_TX_CTL_DONTFRAG
;
2039 * for every radiotap entry that is present
2040 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2041 * entries present, or -EINVAL on error)
2045 ret
= ieee80211_radiotap_iterator_next(&iterator
);
2050 /* see if this argument is something we can use */
2051 switch (iterator
.this_arg_index
) {
2053 * You must take care when dereferencing iterator.this_arg
2054 * for multibyte types... the pointer is not aligned. Use
2055 * get_unaligned((type *)iterator.this_arg) to dereference
2056 * iterator.this_arg for type "type" safely on all arches.
2058 case IEEE80211_RADIOTAP_FLAGS
:
2059 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
2061 * this indicates that the skb we have been
2062 * handed has the 32-bit FCS CRC at the end...
2063 * we should react to that by snipping it off
2064 * because it will be recomputed and added
2067 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
2070 skb_trim(skb
, skb
->len
- FCS_LEN
);
2072 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
2073 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
2074 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
2075 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
2078 case IEEE80211_RADIOTAP_TX_FLAGS
:
2079 txflags
= get_unaligned_le16(iterator
.this_arg
);
2080 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
2081 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
2084 case IEEE80211_RADIOTAP_RATE
:
2085 rate
= *iterator
.this_arg
;
2090 case IEEE80211_RADIOTAP_DATA_RETRIES
:
2091 rate_retries
= *iterator
.this_arg
;
2094 case IEEE80211_RADIOTAP_MCS
:
2095 mcs_known
= iterator
.this_arg
[0];
2096 mcs_flags
= iterator
.this_arg
[1];
2097 if (!(mcs_known
& IEEE80211_RADIOTAP_MCS_HAVE_MCS
))
2101 rate
= iterator
.this_arg
[2];
2102 rate_flags
= IEEE80211_TX_RC_MCS
;
2104 if (mcs_known
& IEEE80211_RADIOTAP_MCS_HAVE_GI
&&
2105 mcs_flags
& IEEE80211_RADIOTAP_MCS_SGI
)
2106 rate_flags
|= IEEE80211_TX_RC_SHORT_GI
;
2108 mcs_bw
= mcs_flags
& IEEE80211_RADIOTAP_MCS_BW_MASK
;
2109 if (mcs_known
& IEEE80211_RADIOTAP_MCS_HAVE_BW
&&
2110 mcs_bw
== IEEE80211_RADIOTAP_MCS_BW_40
)
2111 rate_flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
2114 case IEEE80211_RADIOTAP_VHT
:
2115 vht_known
= get_unaligned_le16(iterator
.this_arg
);
2118 rate_flags
= IEEE80211_TX_RC_VHT_MCS
;
2119 if ((vht_known
& IEEE80211_RADIOTAP_VHT_KNOWN_GI
) &&
2120 (iterator
.this_arg
[2] &
2121 IEEE80211_RADIOTAP_VHT_FLAG_SGI
))
2122 rate_flags
|= IEEE80211_TX_RC_SHORT_GI
;
2124 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
) {
2125 if (iterator
.this_arg
[3] == 1)
2127 IEEE80211_TX_RC_40_MHZ_WIDTH
;
2128 else if (iterator
.this_arg
[3] == 4)
2130 IEEE80211_TX_RC_80_MHZ_WIDTH
;
2131 else if (iterator
.this_arg
[3] == 11)
2133 IEEE80211_TX_RC_160_MHZ_WIDTH
;
2136 vht_mcs
= iterator
.this_arg
[4] >> 4;
2137 vht_nss
= iterator
.this_arg
[4] & 0xF;
2141 * Please update the file
2142 * Documentation/networking/mac80211-injection.txt
2143 * when parsing new fields here.
2151 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
2155 info
->control
.flags
|= IEEE80211_TX_CTRL_RATE_INJECT
;
2157 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
2158 info
->control
.rates
[i
].idx
= -1;
2159 info
->control
.rates
[i
].flags
= 0;
2160 info
->control
.rates
[i
].count
= 0;
2163 if (rate_flags
& IEEE80211_TX_RC_MCS
) {
2164 info
->control
.rates
[0].idx
= rate
;
2165 } else if (rate_flags
& IEEE80211_TX_RC_VHT_MCS
) {
2166 ieee80211_rate_set_vht(info
->control
.rates
, vht_mcs
,
2169 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2170 if (rate
* 5 != sband
->bitrates
[i
].bitrate
)
2173 info
->control
.rates
[0].idx
= i
;
2178 if (info
->control
.rates
[0].idx
< 0)
2179 info
->control
.flags
&= ~IEEE80211_TX_CTRL_RATE_INJECT
;
2181 info
->control
.rates
[0].flags
= rate_flags
;
2182 info
->control
.rates
[0].count
= min_t(u8
, rate_retries
+ 1,
2183 local
->hw
.max_rate_tries
);
2187 * remove the radiotap header
2188 * iterator->_max_length was sanity-checked against
2189 * skb->len by iterator init
2191 skb_pull(skb
, iterator
._max_length
);
2196 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
2197 struct net_device
*dev
)
2199 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2200 struct ieee80211_chanctx_conf
*chanctx_conf
;
2201 struct ieee80211_radiotap_header
*prthdr
=
2202 (struct ieee80211_radiotap_header
*)skb
->data
;
2203 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2204 struct ieee80211_hdr
*hdr
;
2205 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
2206 struct cfg80211_chan_def
*chandef
;
2210 /* check for not even having the fixed radiotap header part */
2211 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
2212 goto fail
; /* too short to be possibly valid */
2214 /* is it a header version we can trust to find length from? */
2215 if (unlikely(prthdr
->it_version
))
2216 goto fail
; /* only version 0 is supported */
2218 /* then there must be a radiotap header with a length we can use */
2219 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
2221 /* does the skb contain enough to deliver on the alleged length? */
2222 if (unlikely(skb
->len
< len_rthdr
))
2223 goto fail
; /* skb too short for claimed rt header extent */
2226 * fix up the pointers accounting for the radiotap
2227 * header still being in there. We are being given
2228 * a precooked IEEE80211 header so no need for
2231 skb_set_mac_header(skb
, len_rthdr
);
2233 * these are just fixed to the end of the rt area since we
2234 * don't have any better information and at this point, nobody cares
2236 skb_set_network_header(skb
, len_rthdr
);
2237 skb_set_transport_header(skb
, len_rthdr
);
2239 if (skb
->len
< len_rthdr
+ 2)
2242 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
2243 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
2245 if (skb
->len
< len_rthdr
+ hdrlen
)
2249 * Initialize skb->protocol if the injected frame is a data frame
2250 * carrying a rfc1042 header
2252 if (ieee80211_is_data(hdr
->frame_control
) &&
2253 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
2254 u8
*payload
= (u8
*)hdr
+ hdrlen
;
2256 if (ether_addr_equal(payload
, rfc1042_header
))
2257 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
2261 memset(info
, 0, sizeof(*info
));
2263 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2264 IEEE80211_TX_CTL_INJECTED
;
2269 * We process outgoing injected frames that have a local address
2270 * we handle as though they are non-injected frames.
2271 * This code here isn't entirely correct, the local MAC address
2272 * isn't always enough to find the interface to use; for proper
2273 * VLAN/WDS support we will need a different mechanism (which
2274 * likely isn't going to be monitor interfaces).
2276 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2278 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
2279 if (!ieee80211_sdata_running(tmp_sdata
))
2281 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
2282 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
2283 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
2285 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
2291 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2292 if (!chanctx_conf
) {
2293 tmp_sdata
= rcu_dereference(local
->monitor_sdata
);
2296 rcu_dereference(tmp_sdata
->vif
.chanctx_conf
);
2300 chandef
= &chanctx_conf
->def
;
2301 else if (!local
->use_chanctx
)
2302 chandef
= &local
->_oper_chandef
;
2307 * Frame injection is not allowed if beaconing is not allowed
2308 * or if we need radar detection. Beaconing is usually not allowed when
2309 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2310 * Passive scan is also used in world regulatory domains where
2311 * your country is not known and as such it should be treated as
2312 * NO TX unless the channel is explicitly allowed in which case
2313 * your current regulatory domain would not have the passive scan
2316 * Since AP mode uses monitor interfaces to inject/TX management
2317 * frames we can make AP mode the exception to this rule once it
2318 * supports radar detection as its implementation can deal with
2319 * radar detection by itself. We can do that later by adding a
2320 * monitor flag interfaces used for AP support.
2322 if (!cfg80211_reg_can_beacon(local
->hw
.wiphy
, chandef
,
2326 info
->band
= chandef
->chan
->band
;
2328 /* process and remove the injection radiotap header */
2329 if (!ieee80211_parse_tx_radiotap(local
, skb
))
2332 ieee80211_xmit(sdata
, NULL
, skb
, 0);
2335 return NETDEV_TX_OK
;
2341 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
2344 static inline bool ieee80211_is_tdls_setup(struct sk_buff
*skb
)
2346 u16 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
2348 return ethertype
== ETH_P_TDLS
&&
2350 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
;
2353 static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data
*sdata
,
2354 struct sk_buff
*skb
,
2355 struct sta_info
**sta_out
)
2357 struct sta_info
*sta
;
2359 switch (sdata
->vif
.type
) {
2360 case NL80211_IFTYPE_AP_VLAN
:
2361 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
2365 } else if (sdata
->wdev
.use_4addr
) {
2369 case NL80211_IFTYPE_AP
:
2370 case NL80211_IFTYPE_OCB
:
2371 case NL80211_IFTYPE_ADHOC
:
2372 if (is_multicast_ether_addr(skb
->data
)) {
2373 *sta_out
= ERR_PTR(-ENOENT
);
2376 sta
= sta_info_get_bss(sdata
, skb
->data
);
2378 case NL80211_IFTYPE_WDS
:
2379 sta
= sta_info_get(sdata
, sdata
->u
.wds
.remote_addr
);
2381 #ifdef CONFIG_MAC80211_MESH
2382 case NL80211_IFTYPE_MESH_POINT
:
2383 /* determined much later */
2387 case NL80211_IFTYPE_STATION
:
2388 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
2389 sta
= sta_info_get(sdata
, skb
->data
);
2390 if (sta
&& test_sta_flag(sta
, WLAN_STA_TDLS_PEER
)) {
2391 if (test_sta_flag(sta
,
2392 WLAN_STA_TDLS_PEER_AUTH
)) {
2398 * TDLS link during setup - throw out frames to
2399 * peer. Allow TDLS-setup frames to unauthorized
2400 * peers for the special case of a link teardown
2401 * after a TDLS sta is removed due to being
2404 if (!ieee80211_is_tdls_setup(skb
))
2410 sta
= sta_info_get(sdata
, sdata
->u
.mgd
.bssid
);
2418 *sta_out
= sta
?: ERR_PTR(-ENOENT
);
2423 * ieee80211_build_hdr - build 802.11 header in the given frame
2424 * @sdata: virtual interface to build the header for
2425 * @skb: the skb to build the header in
2426 * @info_flags: skb flags to set
2428 * This function takes the skb with 802.3 header and reformats the header to
2429 * the appropriate IEEE 802.11 header based on which interface the packet is
2430 * being transmitted on.
2432 * Note that this function also takes care of the TX status request and
2433 * potential unsharing of the SKB - this needs to be interleaved with the
2436 * The function requires the read-side RCU lock held
2438 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2440 static struct sk_buff
*ieee80211_build_hdr(struct ieee80211_sub_if_data
*sdata
,
2441 struct sk_buff
*skb
, u32 info_flags
,
2442 struct sta_info
*sta
)
2444 struct ieee80211_local
*local
= sdata
->local
;
2445 struct ieee80211_tx_info
*info
;
2447 u16 ethertype
, hdrlen
, meshhdrlen
= 0;
2449 struct ieee80211_hdr hdr
;
2450 struct ieee80211s_hdr mesh_hdr __maybe_unused
;
2451 struct mesh_path __maybe_unused
*mppath
= NULL
, *mpath
= NULL
;
2452 const u8
*encaps_data
;
2453 int encaps_len
, skip_header_bytes
;
2454 bool wme_sta
= false, authorized
= false;
2458 struct ieee80211_chanctx_conf
*chanctx_conf
;
2459 struct ieee80211_sub_if_data
*ap_sdata
;
2460 enum nl80211_band band
;
2466 /* convert Ethernet header to proper 802.11 header (based on
2467 * operation mode) */
2468 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
2469 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
2471 switch (sdata
->vif
.type
) {
2472 case NL80211_IFTYPE_AP_VLAN
:
2473 if (sdata
->wdev
.use_4addr
) {
2474 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
2476 memcpy(hdr
.addr1
, sta
->sta
.addr
, ETH_ALEN
);
2477 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2478 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2479 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2481 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2482 wme_sta
= sta
->sta
.wme
;
2484 ap_sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
2486 chanctx_conf
= rcu_dereference(ap_sdata
->vif
.chanctx_conf
);
2487 if (!chanctx_conf
) {
2491 band
= chanctx_conf
->def
.chan
->band
;
2492 if (sdata
->wdev
.use_4addr
)
2495 case NL80211_IFTYPE_AP
:
2496 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
2497 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2498 if (!chanctx_conf
) {
2502 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
2504 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2505 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2506 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2508 band
= chanctx_conf
->def
.chan
->band
;
2510 case NL80211_IFTYPE_WDS
:
2511 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
2513 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
2514 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2515 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2516 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2519 * This is the exception! WDS style interfaces are prohibited
2520 * when channel contexts are in used so this must be valid
2522 band
= local
->hw
.conf
.chandef
.chan
->band
;
2524 #ifdef CONFIG_MAC80211_MESH
2525 case NL80211_IFTYPE_MESH_POINT
:
2526 if (!is_multicast_ether_addr(skb
->data
)) {
2527 struct sta_info
*next_hop
;
2528 bool mpp_lookup
= true;
2530 mpath
= mesh_path_lookup(sdata
, skb
->data
);
2533 next_hop
= rcu_dereference(mpath
->next_hop
);
2535 !(mpath
->flags
& (MESH_PATH_ACTIVE
|
2536 MESH_PATH_RESOLVING
)))
2541 mppath
= mpp_path_lookup(sdata
, skb
->data
);
2543 mppath
->exp_time
= jiffies
;
2546 if (mppath
&& mpath
)
2547 mesh_path_del(sdata
, mpath
->dst
);
2551 * Use address extension if it is a packet from
2552 * another interface or if we know the destination
2553 * is being proxied by a portal (i.e. portal address
2554 * differs from proxied address)
2556 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
2557 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
2558 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
2559 skb
->data
, skb
->data
+ ETH_ALEN
);
2560 meshhdrlen
= ieee80211_new_mesh_header(sdata
, &mesh_hdr
,
2563 /* DS -> MBSS (802.11-2012 13.11.3.3).
2564 * For unicast with unknown forwarding information,
2565 * destination might be in the MBSS or if that fails
2566 * forwarded to another mesh gate. In either case
2567 * resolution will be handled in ieee80211_xmit(), so
2568 * leave the original DA. This also works for mcast */
2569 const u8
*mesh_da
= skb
->data
;
2572 mesh_da
= mppath
->mpp
;
2574 mesh_da
= mpath
->dst
;
2576 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
2577 mesh_da
, sdata
->vif
.addr
);
2578 if (is_multicast_ether_addr(mesh_da
))
2579 /* DA TA mSA AE:SA */
2580 meshhdrlen
= ieee80211_new_mesh_header(
2582 skb
->data
+ ETH_ALEN
, NULL
);
2584 /* RA TA mDA mSA AE:DA SA */
2585 meshhdrlen
= ieee80211_new_mesh_header(
2586 sdata
, &mesh_hdr
, skb
->data
,
2587 skb
->data
+ ETH_ALEN
);
2590 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2591 if (!chanctx_conf
) {
2595 band
= chanctx_conf
->def
.chan
->band
;
2598 case NL80211_IFTYPE_STATION
:
2599 /* we already did checks when looking up the RA STA */
2600 tdls_peer
= test_sta_flag(sta
, WLAN_STA_TDLS_PEER
);
2604 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2605 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2606 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2608 } else if (sdata
->u
.mgd
.use_4addr
&&
2609 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
2610 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2611 IEEE80211_FCTL_TODS
);
2613 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2614 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2615 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2616 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2619 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
2621 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2622 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2623 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2626 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2627 if (!chanctx_conf
) {
2631 band
= chanctx_conf
->def
.chan
->band
;
2633 case NL80211_IFTYPE_OCB
:
2635 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2636 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2637 eth_broadcast_addr(hdr
.addr3
);
2639 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2640 if (!chanctx_conf
) {
2644 band
= chanctx_conf
->def
.chan
->band
;
2646 case NL80211_IFTYPE_ADHOC
:
2648 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2649 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2650 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
2652 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2653 if (!chanctx_conf
) {
2657 band
= chanctx_conf
->def
.chan
->band
;
2664 multicast
= is_multicast_ether_addr(hdr
.addr1
);
2666 /* sta is always NULL for mesh */
2668 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2669 wme_sta
= sta
->sta
.wme
;
2670 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2671 /* For mesh, the use of the QoS header is mandatory */
2675 /* receiver does QoS (which also means we do) use it */
2677 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2682 * Drop unicast frames to unauthorised stations unless they are
2683 * EAPOL frames from the local station.
2685 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2686 (sdata
->vif
.type
!= NL80211_IFTYPE_OCB
) &&
2687 !multicast
&& !authorized
&&
2688 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
2689 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
2690 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2691 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2692 sdata
->name
, hdr
.addr1
);
2695 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
2701 if (unlikely(!multicast
&& skb
->sk
&&
2702 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
2703 struct sk_buff
*ack_skb
= skb_clone_sk(skb
);
2706 unsigned long flags
;
2709 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
2710 id
= idr_alloc(&local
->ack_status_frames
, ack_skb
,
2711 1, 0x10000, GFP_ATOMIC
);
2712 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2716 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2724 * If the skb is shared we need to obtain our own copy.
2726 if (skb_shared(skb
)) {
2727 struct sk_buff
*tmp_skb
= skb
;
2729 /* can't happen -- skb is a clone if info_id != 0 */
2732 skb
= skb_clone(skb
, GFP_ATOMIC
);
2741 hdr
.frame_control
= fc
;
2742 hdr
.duration_id
= 0;
2745 skip_header_bytes
= ETH_HLEN
;
2746 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2747 encaps_data
= bridge_tunnel_header
;
2748 encaps_len
= sizeof(bridge_tunnel_header
);
2749 skip_header_bytes
-= 2;
2750 } else if (ethertype
>= ETH_P_802_3_MIN
) {
2751 encaps_data
= rfc1042_header
;
2752 encaps_len
= sizeof(rfc1042_header
);
2753 skip_header_bytes
-= 2;
2759 skb_pull(skb
, skip_header_bytes
);
2760 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2763 * So we need to modify the skb header and hence need a copy of
2764 * that. The head_need variable above doesn't, so far, include
2765 * the needed header space that we don't need right away. If we
2766 * can, then we don't reallocate right now but only after the
2767 * frame arrives at the master device (if it does...)
2769 * If we cannot, however, then we will reallocate to include all
2770 * the ever needed space. Also, if we need to reallocate it anyway,
2771 * make it big enough for everything we may ever need.
2774 if (head_need
> 0 || skb_cloned(skb
)) {
2775 head_need
+= sdata
->encrypt_headroom
;
2776 head_need
+= local
->tx_headroom
;
2777 head_need
= max_t(int, 0, head_need
);
2778 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true)) {
2779 ieee80211_free_txskb(&local
->hw
, skb
);
2781 return ERR_PTR(-ENOMEM
);
2786 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2788 #ifdef CONFIG_MAC80211_MESH
2790 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2793 if (ieee80211_is_data_qos(fc
)) {
2794 __le16
*qos_control
;
2796 qos_control
= skb_push(skb
, 2);
2797 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2799 * Maybe we could actually set some fields here, for now just
2800 * initialise to zero to indicate no special operation.
2804 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2806 skb_reset_mac_header(skb
);
2808 info
= IEEE80211_SKB_CB(skb
);
2809 memset(info
, 0, sizeof(*info
));
2811 info
->flags
= info_flags
;
2812 info
->ack_frame_id
= info_id
;
2818 return ERR_PTR(ret
);
2822 * fast-xmit overview
2824 * The core idea of this fast-xmit is to remove per-packet checks by checking
2825 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2826 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2827 * much less work can be done per packet. For example, fragmentation must be
2828 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2831 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2832 * header and other data to aid packet processing in ieee80211_xmit_fast().
2834 * The most difficult part of this is that when any of these assumptions
2835 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2836 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2837 * since the per-packet code no longer checks the conditions. This is reflected
2838 * by the calls to these functions throughout the rest of the code, and must be
2839 * maintained if any of the TX path checks change.
2842 void ieee80211_check_fast_xmit(struct sta_info
*sta
)
2844 struct ieee80211_fast_tx build
= {}, *fast_tx
= NULL
, *old
;
2845 struct ieee80211_local
*local
= sta
->local
;
2846 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
2847 struct ieee80211_hdr
*hdr
= (void *)build
.hdr
;
2848 struct ieee80211_chanctx_conf
*chanctx_conf
;
2851 if (!ieee80211_hw_check(&local
->hw
, SUPPORT_FAST_XMIT
))
2854 /* Locking here protects both the pointer itself, and against concurrent
2855 * invocations winning data access races to, e.g., the key pointer that
2857 * Without it, the invocation of this function right after the key
2858 * pointer changes wouldn't be sufficient, as another CPU could access
2859 * the pointer, then stall, and then do the cache update after the CPU
2860 * that invalidated the key.
2861 * With the locking, such scenarios cannot happen as the check for the
2862 * key and the fast-tx assignment are done atomically, so the CPU that
2863 * modifies the key will either wait or other one will see the key
2864 * cleared/changed already.
2866 spin_lock_bh(&sta
->lock
);
2867 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
) &&
2868 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
) &&
2869 sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2872 if (!test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
2875 if (test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
2876 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
2877 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
) ||
2878 test_sta_flag(sta
, WLAN_STA_CLEAR_PS_FILT
))
2881 if (sdata
->noack_map
)
2884 /* fast-xmit doesn't handle fragmentation at all */
2885 if (local
->hw
.wiphy
->frag_threshold
!= (u32
)-1 &&
2886 !ieee80211_hw_check(&local
->hw
, SUPPORTS_TX_FRAG
))
2890 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2891 if (!chanctx_conf
) {
2895 build
.band
= chanctx_conf
->def
.chan
->band
;
2898 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
2900 switch (sdata
->vif
.type
) {
2901 case NL80211_IFTYPE_ADHOC
:
2903 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
2904 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
2905 memcpy(hdr
->addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
2908 case NL80211_IFTYPE_STATION
:
2909 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER
)) {
2911 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
2912 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
2913 memcpy(hdr
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2918 if (sdata
->u
.mgd
.use_4addr
) {
2919 /* non-regular ethertype cannot use the fastpath */
2920 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2921 IEEE80211_FCTL_TODS
);
2923 memcpy(hdr
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2924 memcpy(hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2925 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2926 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
2930 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
2932 memcpy(hdr
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2933 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2934 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
2937 case NL80211_IFTYPE_AP_VLAN
:
2938 if (sdata
->wdev
.use_4addr
) {
2939 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2940 IEEE80211_FCTL_TODS
);
2942 memcpy(hdr
->addr1
, sta
->sta
.addr
, ETH_ALEN
);
2943 memcpy(hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2944 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2945 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
2950 case NL80211_IFTYPE_AP
:
2951 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
2953 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
2954 memcpy(hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2955 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2959 /* not handled on fast-xmit */
2965 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2968 /* We store the key here so there's no point in using rcu_dereference()
2969 * but that's fine because the code that changes the pointers will call
2970 * this function after doing so. For a single CPU that would be enough,
2971 * for multiple see the comment above.
2973 build
.key
= rcu_access_pointer(sta
->ptk
[sta
->ptk_idx
]);
2975 build
.key
= rcu_access_pointer(sdata
->default_unicast_key
);
2977 bool gen_iv
, iv_spc
, mmic
;
2979 gen_iv
= build
.key
->conf
.flags
& IEEE80211_KEY_FLAG_GENERATE_IV
;
2980 iv_spc
= build
.key
->conf
.flags
& IEEE80211_KEY_FLAG_PUT_IV_SPACE
;
2981 mmic
= build
.key
->conf
.flags
&
2982 (IEEE80211_KEY_FLAG_GENERATE_MMIC
|
2983 IEEE80211_KEY_FLAG_PUT_MIC_SPACE
);
2985 /* don't handle software crypto */
2986 if (!(build
.key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
2989 /* Key is being removed */
2990 if (build
.key
->flags
& KEY_FLAG_TAINTED
)
2993 switch (build
.key
->conf
.cipher
) {
2994 case WLAN_CIPHER_SUITE_CCMP
:
2995 case WLAN_CIPHER_SUITE_CCMP_256
:
2996 /* add fixed key ID */
2998 (build
.hdr
+ build
.hdr_len
)[3] =
2999 0x20 | (build
.key
->conf
.keyidx
<< 6);
3000 build
.pn_offs
= build
.hdr_len
;
3002 if (gen_iv
|| iv_spc
)
3003 build
.hdr_len
+= IEEE80211_CCMP_HDR_LEN
;
3005 case WLAN_CIPHER_SUITE_GCMP
:
3006 case WLAN_CIPHER_SUITE_GCMP_256
:
3007 /* add fixed key ID */
3009 (build
.hdr
+ build
.hdr_len
)[3] =
3010 0x20 | (build
.key
->conf
.keyidx
<< 6);
3011 build
.pn_offs
= build
.hdr_len
;
3013 if (gen_iv
|| iv_spc
)
3014 build
.hdr_len
+= IEEE80211_GCMP_HDR_LEN
;
3016 case WLAN_CIPHER_SUITE_TKIP
:
3017 /* cannot handle MMIC or IV generation in xmit-fast */
3021 build
.hdr_len
+= IEEE80211_TKIP_IV_LEN
;
3023 case WLAN_CIPHER_SUITE_WEP40
:
3024 case WLAN_CIPHER_SUITE_WEP104
:
3025 /* cannot handle IV generation in fast-xmit */
3029 build
.hdr_len
+= IEEE80211_WEP_IV_LEN
;
3031 case WLAN_CIPHER_SUITE_AES_CMAC
:
3032 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
3033 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
3034 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
3036 "management cipher suite 0x%x enabled for data\n",
3037 build
.key
->conf
.cipher
);
3040 /* we don't know how to generate IVs for this at all */
3041 if (WARN_ON(gen_iv
))
3043 /* pure hardware keys are OK, of course */
3044 if (!(build
.key
->flags
& KEY_FLAG_CIPHER_SCHEME
))
3046 /* cipher scheme might require space allocation */
3048 build
.key
->conf
.iv_len
> IEEE80211_FAST_XMIT_MAX_IV
)
3051 build
.hdr_len
+= build
.key
->conf
.iv_len
;
3054 fc
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
3057 hdr
->frame_control
= fc
;
3059 memcpy(build
.hdr
+ build
.hdr_len
,
3060 rfc1042_header
, sizeof(rfc1042_header
));
3061 build
.hdr_len
+= sizeof(rfc1042_header
);
3063 fast_tx
= kmemdup(&build
, sizeof(build
), GFP_ATOMIC
);
3064 /* if the kmemdup fails, continue w/o fast_tx */
3069 /* we might have raced against another call to this function */
3070 old
= rcu_dereference_protected(sta
->fast_tx
,
3071 lockdep_is_held(&sta
->lock
));
3072 rcu_assign_pointer(sta
->fast_tx
, fast_tx
);
3074 kfree_rcu(old
, rcu_head
);
3075 spin_unlock_bh(&sta
->lock
);
3078 void ieee80211_check_fast_xmit_all(struct ieee80211_local
*local
)
3080 struct sta_info
*sta
;
3083 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
)
3084 ieee80211_check_fast_xmit(sta
);
3088 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data
*sdata
)
3090 struct ieee80211_local
*local
= sdata
->local
;
3091 struct sta_info
*sta
;
3095 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
3096 if (sdata
!= sta
->sdata
&&
3097 (!sta
->sdata
->bss
|| sta
->sdata
->bss
!= sdata
->bss
))
3099 ieee80211_check_fast_xmit(sta
);
3105 void ieee80211_clear_fast_xmit(struct sta_info
*sta
)
3107 struct ieee80211_fast_tx
*fast_tx
;
3109 spin_lock_bh(&sta
->lock
);
3110 fast_tx
= rcu_dereference_protected(sta
->fast_tx
,
3111 lockdep_is_held(&sta
->lock
));
3112 RCU_INIT_POINTER(sta
->fast_tx
, NULL
);
3113 spin_unlock_bh(&sta
->lock
);
3116 kfree_rcu(fast_tx
, rcu_head
);
3119 static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local
*local
,
3120 struct sk_buff
*skb
, int headroom
)
3122 if (skb_headroom(skb
) < headroom
) {
3123 I802_DEBUG_INC(local
->tx_expand_skb_head
);
3125 if (pskb_expand_head(skb
, headroom
, 0, GFP_ATOMIC
)) {
3126 wiphy_debug(local
->hw
.wiphy
,
3127 "failed to reallocate TX buffer\n");
3135 static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data
*sdata
,
3136 struct ieee80211_fast_tx
*fast_tx
,
3137 struct sk_buff
*skb
)
3139 struct ieee80211_local
*local
= sdata
->local
;
3140 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3141 struct ieee80211_hdr
*hdr
;
3142 struct ethhdr
*amsdu_hdr
;
3143 int hdr_len
= fast_tx
->hdr_len
- sizeof(rfc1042_header
);
3144 int subframe_len
= skb
->len
- hdr_len
;
3146 u8
*qc
, *h_80211_src
, *h_80211_dst
;
3149 if (info
->flags
& IEEE80211_TX_CTL_RATE_CTRL_PROBE
)
3152 if (info
->control
.flags
& IEEE80211_TX_CTRL_AMSDU
)
3155 if (!ieee80211_amsdu_realloc_pad(local
, skb
, sizeof(*amsdu_hdr
)))
3158 data
= skb_push(skb
, sizeof(*amsdu_hdr
));
3159 memmove(data
, data
+ sizeof(*amsdu_hdr
), hdr_len
);
3161 amsdu_hdr
= data
+ hdr_len
;
3162 /* h_80211_src/dst is addr* field within hdr */
3163 h_80211_src
= data
+ fast_tx
->sa_offs
;
3164 h_80211_dst
= data
+ fast_tx
->da_offs
;
3166 amsdu_hdr
->h_proto
= cpu_to_be16(subframe_len
);
3167 ether_addr_copy(amsdu_hdr
->h_source
, h_80211_src
);
3168 ether_addr_copy(amsdu_hdr
->h_dest
, h_80211_dst
);
3170 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3171 * fields needs to be changed to BSSID for A-MSDU frames depending
3172 * on FromDS/ToDS values.
3174 switch (sdata
->vif
.type
) {
3175 case NL80211_IFTYPE_STATION
:
3176 bssid
= sdata
->u
.mgd
.bssid
;
3178 case NL80211_IFTYPE_AP
:
3179 case NL80211_IFTYPE_AP_VLAN
:
3180 bssid
= sdata
->vif
.addr
;
3186 if (bssid
&& ieee80211_has_fromds(hdr
->frame_control
))
3187 ether_addr_copy(h_80211_src
, bssid
);
3189 if (bssid
&& ieee80211_has_tods(hdr
->frame_control
))
3190 ether_addr_copy(h_80211_dst
, bssid
);
3192 qc
= ieee80211_get_qos_ctl(hdr
);
3193 *qc
|= IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
3195 info
->control
.flags
|= IEEE80211_TX_CTRL_AMSDU
;
3200 static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data
*sdata
,
3201 struct sta_info
*sta
,
3202 struct ieee80211_fast_tx
*fast_tx
,
3203 struct sk_buff
*skb
)
3205 struct ieee80211_local
*local
= sdata
->local
;
3206 struct fq
*fq
= &local
->fq
;
3208 struct fq_flow
*flow
;
3209 u8 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
3210 struct ieee80211_txq
*txq
= sta
->sta
.txq
[tid
];
3211 struct txq_info
*txqi
;
3212 struct sk_buff
**frag_tail
, *head
;
3213 int subframe_len
= skb
->len
- ETH_ALEN
;
3214 u8 max_subframes
= sta
->sta
.max_amsdu_subframes
;
3215 int max_frags
= local
->hw
.max_tx_fragments
;
3216 int max_amsdu_len
= sta
->sta
.max_amsdu_len
;
3220 unsigned int orig_len
;
3221 int n
= 2, nfrags
, pad
= 0;
3224 if (!ieee80211_hw_check(&local
->hw
, TX_AMSDU
))
3227 if (skb_is_gso(skb
))
3233 txqi
= to_txq_info(txq
);
3234 if (test_bit(IEEE80211_TXQ_NO_AMSDU
, &txqi
->flags
))
3237 if (sta
->sta
.max_rc_amsdu_len
)
3238 max_amsdu_len
= min_t(int, max_amsdu_len
,
3239 sta
->sta
.max_rc_amsdu_len
);
3241 if (sta
->sta
.max_tid_amsdu_len
[tid
])
3242 max_amsdu_len
= min_t(int, max_amsdu_len
,
3243 sta
->sta
.max_tid_amsdu_len
[tid
]);
3245 spin_lock_bh(&fq
->lock
);
3247 /* TODO: Ideally aggregation should be done on dequeue to remain
3248 * responsive to environment changes.
3252 flow
= fq_flow_classify(fq
, tin
, skb
, fq_flow_get_default_func
);
3253 head
= skb_peek_tail(&flow
->queue
);
3254 if (!head
|| skb_is_gso(head
))
3257 orig_len
= head
->len
;
3259 if (skb
->len
+ head
->len
> max_amsdu_len
)
3262 nfrags
= 1 + skb_shinfo(skb
)->nr_frags
;
3263 nfrags
+= 1 + skb_shinfo(head
)->nr_frags
;
3264 frag_tail
= &skb_shinfo(head
)->frag_list
;
3265 while (*frag_tail
) {
3266 nfrags
+= 1 + skb_shinfo(*frag_tail
)->nr_frags
;
3267 frag_tail
= &(*frag_tail
)->next
;
3271 if (max_subframes
&& n
> max_subframes
)
3274 if (max_frags
&& nfrags
> max_frags
)
3277 if (!drv_can_aggregate_in_amsdu(local
, head
, skb
))
3280 if (!ieee80211_amsdu_prepare_head(sdata
, fast_tx
, head
))
3284 * Pad out the previous subframe to a multiple of 4 by adding the
3285 * padding to the next one, that's being added. Note that head->len
3286 * is the length of the full A-MSDU, but that works since each time
3287 * we add a new subframe we pad out the previous one to a multiple
3288 * of 4 and thus it no longer matters in the next round.
3290 hdrlen
= fast_tx
->hdr_len
- sizeof(rfc1042_header
);
3291 if ((head
->len
- hdrlen
) & 3)
3292 pad
= 4 - ((head
->len
- hdrlen
) & 3);
3294 if (!ieee80211_amsdu_realloc_pad(local
, skb
, sizeof(rfc1042_header
) +
3299 data
= skb_push(skb
, ETH_ALEN
+ 2);
3300 memmove(data
, data
+ ETH_ALEN
+ 2, 2 * ETH_ALEN
);
3302 data
+= 2 * ETH_ALEN
;
3303 len
= cpu_to_be16(subframe_len
);
3304 memcpy(data
, &len
, 2);
3305 memcpy(data
+ 2, rfc1042_header
, sizeof(rfc1042_header
));
3307 memset(skb_push(skb
, pad
), 0, pad
);
3309 head
->len
+= skb
->len
;
3310 head
->data_len
+= skb
->len
;
3314 if (head
->len
!= orig_len
) {
3315 flow
->backlog
+= head
->len
- orig_len
;
3316 tin
->backlog_bytes
+= head
->len
- orig_len
;
3318 fq_recalc_backlog(fq
, tin
, flow
);
3321 spin_unlock_bh(&fq
->lock
);
3327 * Can be called while the sta lock is held. Anything that can cause packets to
3328 * be generated will cause deadlock!
3330 static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data
*sdata
,
3331 struct sta_info
*sta
, u8 pn_offs
,
3332 struct ieee80211_key
*key
,
3333 struct sk_buff
*skb
)
3335 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3336 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
3337 u8 tid
= IEEE80211_NUM_TIDS
;
3340 info
->control
.hw_key
= &key
->conf
;
3342 ieee80211_tx_stats(skb
->dev
, skb
->len
);
3344 if (hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) {
3345 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
3346 hdr
->seq_ctrl
= ieee80211_tx_next_seq(sta
, tid
);
3348 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
3349 hdr
->seq_ctrl
= cpu_to_le16(sdata
->sequence_number
);
3350 sdata
->sequence_number
+= 0x10;
3353 if (skb_shinfo(skb
)->gso_size
)
3354 sta
->tx_stats
.msdu
[tid
] +=
3355 DIV_ROUND_UP(skb
->len
, skb_shinfo(skb
)->gso_size
);
3357 sta
->tx_stats
.msdu
[tid
]++;
3359 info
->hw_queue
= sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
3361 /* statistics normally done by ieee80211_tx_h_stats (but that
3362 * has to consider fragmentation, so is more complex)
3364 sta
->tx_stats
.bytes
[skb_get_queue_mapping(skb
)] += skb
->len
;
3365 sta
->tx_stats
.packets
[skb_get_queue_mapping(skb
)]++;
3369 u8
*crypto_hdr
= skb
->data
+ pn_offs
;
3371 switch (key
->conf
.cipher
) {
3372 case WLAN_CIPHER_SUITE_CCMP
:
3373 case WLAN_CIPHER_SUITE_CCMP_256
:
3374 case WLAN_CIPHER_SUITE_GCMP
:
3375 case WLAN_CIPHER_SUITE_GCMP_256
:
3376 pn
= atomic64_inc_return(&key
->conf
.tx_pn
);
3378 crypto_hdr
[1] = pn
>> 8;
3379 crypto_hdr
[4] = pn
>> 16;
3380 crypto_hdr
[5] = pn
>> 24;
3381 crypto_hdr
[6] = pn
>> 32;
3382 crypto_hdr
[7] = pn
>> 40;
3388 static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data
*sdata
,
3389 struct sta_info
*sta
,
3390 struct ieee80211_fast_tx
*fast_tx
,
3391 struct sk_buff
*skb
)
3393 struct ieee80211_local
*local
= sdata
->local
;
3394 u16 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
3395 int extra_head
= fast_tx
->hdr_len
- (ETH_HLEN
- 2);
3396 int hw_headroom
= sdata
->local
->hw
.extra_tx_headroom
;
3398 struct ieee80211_tx_info
*info
;
3399 struct ieee80211_hdr
*hdr
= (void *)fast_tx
->hdr
;
3400 struct ieee80211_tx_data tx
;
3401 ieee80211_tx_result r
;
3402 struct tid_ampdu_tx
*tid_tx
= NULL
;
3403 u8 tid
= IEEE80211_NUM_TIDS
;
3405 /* control port protocol needs a lot of special handling */
3406 if (cpu_to_be16(ethertype
) == sdata
->control_port_protocol
)
3409 /* only RFC 1042 SNAP */
3410 if (ethertype
< ETH_P_802_3_MIN
)
3413 /* don't handle TX status request here either */
3414 if (skb
->sk
&& skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)
3417 if (hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) {
3418 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
3419 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[tid
]);
3421 if (!test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
))
3423 if (tid_tx
->timeout
)
3424 tid_tx
->last_tx
= jiffies
;
3428 /* after this point (skb is modified) we cannot return false */
3430 if (skb_shared(skb
)) {
3431 struct sk_buff
*tmp_skb
= skb
;
3433 skb
= skb_clone(skb
, GFP_ATOMIC
);
3440 if ((hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) &&
3441 ieee80211_amsdu_aggregate(sdata
, sta
, fast_tx
, skb
))
3444 /* will not be crypto-handled beyond what we do here, so use false
3445 * as the may-encrypt argument for the resize to not account for
3446 * more room than we already have in 'extra_head'
3448 if (unlikely(ieee80211_skb_resize(sdata
, skb
,
3449 max_t(int, extra_head
+ hw_headroom
-
3450 skb_headroom(skb
), 0),
3456 memcpy(ð
, skb
->data
, ETH_HLEN
- 2);
3457 hdr
= skb_push(skb
, extra_head
);
3458 memcpy(skb
->data
, fast_tx
->hdr
, fast_tx
->hdr_len
);
3459 memcpy(skb
->data
+ fast_tx
->da_offs
, eth
.h_dest
, ETH_ALEN
);
3460 memcpy(skb
->data
+ fast_tx
->sa_offs
, eth
.h_source
, ETH_ALEN
);
3462 info
= IEEE80211_SKB_CB(skb
);
3463 memset(info
, 0, sizeof(*info
));
3464 info
->band
= fast_tx
->band
;
3465 info
->control
.vif
= &sdata
->vif
;
3466 info
->flags
= IEEE80211_TX_CTL_FIRST_FRAGMENT
|
3467 IEEE80211_TX_CTL_DONTFRAG
|
3468 (tid_tx
? IEEE80211_TX_CTL_AMPDU
: 0);
3469 info
->control
.flags
= IEEE80211_TX_CTRL_FAST_XMIT
;
3471 if (hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) {
3472 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
3473 *ieee80211_get_qos_ctl(hdr
) = tid
;
3476 __skb_queue_head_init(&tx
.skbs
);
3478 tx
.flags
= IEEE80211_TX_UNICAST
;
3482 tx
.key
= fast_tx
->key
;
3484 if (!ieee80211_hw_check(&local
->hw
, HAS_RATE_CONTROL
)) {
3486 r
= ieee80211_tx_h_rate_ctrl(&tx
);
3490 if (r
!= TX_CONTINUE
) {
3497 if (ieee80211_queue_skb(local
, sdata
, sta
, skb
))
3500 ieee80211_xmit_fast_finish(sdata
, sta
, fast_tx
->pn_offs
,
3503 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
3504 sdata
= container_of(sdata
->bss
,
3505 struct ieee80211_sub_if_data
, u
.ap
);
3507 __skb_queue_tail(&tx
.skbs
, skb
);
3508 ieee80211_tx_frags(local
, &sdata
->vif
, &sta
->sta
, &tx
.skbs
, false);
3512 struct sk_buff
*ieee80211_tx_dequeue(struct ieee80211_hw
*hw
,
3513 struct ieee80211_txq
*txq
)
3515 struct ieee80211_local
*local
= hw_to_local(hw
);
3516 struct txq_info
*txqi
= container_of(txq
, struct txq_info
, txq
);
3517 struct ieee80211_hdr
*hdr
;
3518 struct sk_buff
*skb
= NULL
;
3519 struct fq
*fq
= &local
->fq
;
3520 struct fq_tin
*tin
= &txqi
->tin
;
3521 struct ieee80211_tx_info
*info
;
3522 struct ieee80211_tx_data tx
;
3523 ieee80211_tx_result r
;
3524 struct ieee80211_vif
*vif
= txq
->vif
;
3526 spin_lock_bh(&fq
->lock
);
3528 if (test_bit(IEEE80211_TXQ_STOP
, &txqi
->flags
) ||
3529 test_bit(IEEE80211_TXQ_STOP_NETIF_TX
, &txqi
->flags
))
3532 if (vif
->txqs_stopped
[ieee80211_ac_from_tid(txq
->tid
)]) {
3533 set_bit(IEEE80211_TXQ_STOP_NETIF_TX
, &txqi
->flags
);
3537 /* Make sure fragments stay together. */
3538 skb
= __skb_dequeue(&txqi
->frags
);
3543 skb
= fq_tin_dequeue(fq
, tin
, fq_tin_dequeue_func
);
3547 hdr
= (struct ieee80211_hdr
*)skb
->data
;
3548 info
= IEEE80211_SKB_CB(skb
);
3550 memset(&tx
, 0, sizeof(tx
));
3551 __skb_queue_head_init(&tx
.skbs
);
3554 tx
.sdata
= vif_to_sdata(info
->control
.vif
);
3557 tx
.sta
= container_of(txq
->sta
, struct sta_info
, sta
);
3560 * The key can be removed while the packet was queued, so need to call
3561 * this here to get the current key.
3563 r
= ieee80211_tx_h_select_key(&tx
);
3564 if (r
!= TX_CONTINUE
) {
3565 ieee80211_free_txskb(&local
->hw
, skb
);
3569 if (test_bit(IEEE80211_TXQ_AMPDU
, &txqi
->flags
))
3570 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
3572 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
3574 if (info
->control
.flags
& IEEE80211_TX_CTRL_FAST_XMIT
) {
3575 struct sta_info
*sta
= container_of(txq
->sta
, struct sta_info
,
3580 (tx
.key
->conf
.flags
& IEEE80211_KEY_FLAG_GENERATE_IV
))
3581 pn_offs
= ieee80211_hdrlen(hdr
->frame_control
);
3583 ieee80211_xmit_fast_finish(sta
->sdata
, sta
, pn_offs
,
3586 if (invoke_tx_handlers_late(&tx
))
3589 skb
= __skb_dequeue(&tx
.skbs
);
3591 if (!skb_queue_empty(&tx
.skbs
))
3592 skb_queue_splice_tail(&tx
.skbs
, &txqi
->frags
);
3595 if (skb_has_frag_list(skb
) &&
3596 !ieee80211_hw_check(&local
->hw
, TX_FRAG_LIST
)) {
3597 if (skb_linearize(skb
)) {
3598 ieee80211_free_txskb(&local
->hw
, skb
);
3603 switch (tx
.sdata
->vif
.type
) {
3604 case NL80211_IFTYPE_MONITOR
:
3605 if (tx
.sdata
->u
.mntr
.flags
& MONITOR_FLAG_ACTIVE
) {
3606 vif
= &tx
.sdata
->vif
;
3609 tx
.sdata
= rcu_dereference(local
->monitor_sdata
);
3611 vif
= &tx
.sdata
->vif
;
3613 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
3614 } else if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
)) {
3615 ieee80211_free_txskb(&local
->hw
, skb
);
3621 case NL80211_IFTYPE_AP_VLAN
:
3622 tx
.sdata
= container_of(tx
.sdata
->bss
,
3623 struct ieee80211_sub_if_data
, u
.ap
);
3626 vif
= &tx
.sdata
->vif
;
3630 IEEE80211_SKB_CB(skb
)->control
.vif
= vif
;
3633 spin_unlock_bh(&fq
->lock
);
3637 EXPORT_SYMBOL(ieee80211_tx_dequeue
);
3639 void __ieee80211_subif_start_xmit(struct sk_buff
*skb
,
3640 struct net_device
*dev
,
3643 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3644 struct sta_info
*sta
;
3645 struct sk_buff
*next
;
3647 if (unlikely(skb
->len
< ETH_HLEN
)) {
3654 if (ieee80211_lookup_ra_sta(sdata
, skb
, &sta
))
3657 if (!IS_ERR_OR_NULL(sta
)) {
3658 struct ieee80211_fast_tx
*fast_tx
;
3660 sk_pacing_shift_update(skb
->sk
, sdata
->local
->hw
.tx_sk_pacing_shift
);
3662 fast_tx
= rcu_dereference(sta
->fast_tx
);
3665 ieee80211_xmit_fast(sdata
, sta
, fast_tx
, skb
))
3669 if (skb_is_gso(skb
)) {
3670 struct sk_buff
*segs
;
3672 segs
= skb_gso_segment(skb
, 0);
3680 /* we cannot process non-linear frames on this path */
3681 if (skb_linearize(skb
)) {
3686 /* the frame could be fragmented, software-encrypted, and other
3687 * things so we cannot really handle checksum offload with it -
3688 * fix it up in software before we handle anything else.
3690 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
3691 skb_set_transport_header(skb
,
3692 skb_checksum_start_offset(skb
));
3693 if (skb_checksum_help(skb
))
3706 skb
= ieee80211_build_hdr(sdata
, skb
, info_flags
, sta
);
3710 ieee80211_tx_stats(dev
, skb
->len
);
3712 ieee80211_xmit(sdata
, sta
, skb
, 0);
3721 static int ieee80211_change_da(struct sk_buff
*skb
, struct sta_info
*sta
)
3726 err
= skb_ensure_writable(skb
, ETH_HLEN
);
3730 eth
= (void *)skb
->data
;
3731 ether_addr_copy(eth
->h_dest
, sta
->sta
.addr
);
3736 static bool ieee80211_multicast_to_unicast(struct sk_buff
*skb
,
3737 struct net_device
*dev
)
3739 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3740 const struct ethhdr
*eth
= (void *)skb
->data
;
3741 const struct vlan_ethhdr
*ethvlan
= (void *)skb
->data
;
3744 if (likely(!is_multicast_ether_addr(eth
->h_dest
)))
3747 switch (sdata
->vif
.type
) {
3748 case NL80211_IFTYPE_AP_VLAN
:
3749 if (sdata
->u
.vlan
.sta
)
3751 if (sdata
->wdev
.use_4addr
)
3754 case NL80211_IFTYPE_AP
:
3755 /* check runtime toggle for this bss */
3756 if (!sdata
->bss
->multicast_to_unicast
)
3763 /* multicast to unicast conversion only for some payload */
3764 ethertype
= eth
->h_proto
;
3765 if (ethertype
== htons(ETH_P_8021Q
) && skb
->len
>= VLAN_ETH_HLEN
)
3766 ethertype
= ethvlan
->h_vlan_encapsulated_proto
;
3767 switch (ethertype
) {
3768 case htons(ETH_P_ARP
):
3769 case htons(ETH_P_IP
):
3770 case htons(ETH_P_IPV6
):
3780 ieee80211_convert_to_unicast(struct sk_buff
*skb
, struct net_device
*dev
,
3781 struct sk_buff_head
*queue
)
3783 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3784 struct ieee80211_local
*local
= sdata
->local
;
3785 const struct ethhdr
*eth
= (struct ethhdr
*)skb
->data
;
3786 struct sta_info
*sta
, *first
= NULL
;
3787 struct sk_buff
*cloned_skb
;
3791 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
3792 if (sdata
!= sta
->sdata
)
3793 /* AP-VLAN mismatch */
3795 if (unlikely(ether_addr_equal(eth
->h_source
, sta
->sta
.addr
)))
3796 /* do not send back to source */
3802 cloned_skb
= skb_clone(skb
, GFP_ATOMIC
);
3805 if (unlikely(ieee80211_change_da(cloned_skb
, sta
))) {
3806 dev_kfree_skb(cloned_skb
);
3809 __skb_queue_tail(queue
, cloned_skb
);
3812 if (likely(first
)) {
3813 if (unlikely(ieee80211_change_da(skb
, first
)))
3815 __skb_queue_tail(queue
, skb
);
3817 /* no STA connected, drop */
3824 __skb_queue_purge(queue
);
3825 __skb_queue_tail(queue
, skb
);
3831 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3832 * @skb: packet to be sent
3833 * @dev: incoming interface
3835 * On failure skb will be freed.
3837 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
3838 struct net_device
*dev
)
3840 if (unlikely(ieee80211_multicast_to_unicast(skb
, dev
))) {
3841 struct sk_buff_head queue
;
3843 __skb_queue_head_init(&queue
);
3844 ieee80211_convert_to_unicast(skb
, dev
, &queue
);
3845 while ((skb
= __skb_dequeue(&queue
)))
3846 __ieee80211_subif_start_xmit(skb
, dev
, 0);
3848 __ieee80211_subif_start_xmit(skb
, dev
, 0);
3851 return NETDEV_TX_OK
;
3855 ieee80211_build_data_template(struct ieee80211_sub_if_data
*sdata
,
3856 struct sk_buff
*skb
, u32 info_flags
)
3858 struct ieee80211_hdr
*hdr
;
3859 struct ieee80211_tx_data tx
= {
3860 .local
= sdata
->local
,
3863 struct sta_info
*sta
;
3867 if (ieee80211_lookup_ra_sta(sdata
, skb
, &sta
)) {
3869 skb
= ERR_PTR(-EINVAL
);
3873 skb
= ieee80211_build_hdr(sdata
, skb
, info_flags
, sta
);
3877 hdr
= (void *)skb
->data
;
3878 tx
.sta
= sta_info_get(sdata
, hdr
->addr1
);
3881 if (ieee80211_tx_h_select_key(&tx
) != TX_CONTINUE
) {
3884 return ERR_PTR(-EINVAL
);
3893 * ieee80211_clear_tx_pending may not be called in a context where
3894 * it is possible that it packets could come in again.
3896 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
3898 struct sk_buff
*skb
;
3901 for (i
= 0; i
< local
->hw
.queues
; i
++) {
3902 while ((skb
= skb_dequeue(&local
->pending
[i
])) != NULL
)
3903 ieee80211_free_txskb(&local
->hw
, skb
);
3908 * Returns false if the frame couldn't be transmitted but was queued instead,
3909 * which in this case means re-queued -- take as an indication to stop sending
3910 * more pending frames.
3912 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
3913 struct sk_buff
*skb
)
3915 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3916 struct ieee80211_sub_if_data
*sdata
;
3917 struct sta_info
*sta
;
3918 struct ieee80211_hdr
*hdr
;
3920 struct ieee80211_chanctx_conf
*chanctx_conf
;
3922 sdata
= vif_to_sdata(info
->control
.vif
);
3924 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
3925 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3926 if (unlikely(!chanctx_conf
)) {
3930 info
->band
= chanctx_conf
->def
.chan
->band
;
3931 result
= ieee80211_tx(sdata
, NULL
, skb
, true, 0);
3933 struct sk_buff_head skbs
;
3935 __skb_queue_head_init(&skbs
);
3936 __skb_queue_tail(&skbs
, skb
);
3938 hdr
= (struct ieee80211_hdr
*)skb
->data
;
3939 sta
= sta_info_get(sdata
, hdr
->addr1
);
3941 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
3948 * Transmit all pending packets. Called from tasklet.
3950 void ieee80211_tx_pending(unsigned long data
)
3952 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
3953 unsigned long flags
;
3959 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
3960 for (i
= 0; i
< local
->hw
.queues
; i
++) {
3962 * If queue is stopped by something other than due to pending
3963 * frames, or we have no pending frames, proceed to next queue.
3965 if (local
->queue_stop_reasons
[i
] ||
3966 skb_queue_empty(&local
->pending
[i
]))
3969 while (!skb_queue_empty(&local
->pending
[i
])) {
3970 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
3971 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3973 if (WARN_ON(!info
->control
.vif
)) {
3974 ieee80211_free_txskb(&local
->hw
, skb
);
3978 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
3981 txok
= ieee80211_tx_pending_skb(local
, skb
);
3982 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
3988 if (skb_queue_empty(&local
->pending
[i
]))
3989 ieee80211_propagate_queue_wake(local
, i
);
3991 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
3996 /* functions for drivers to get certain frames */
3998 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
3999 struct ps_data
*ps
, struct sk_buff
*skb
,
4004 int i
, have_bits
= 0, n1
, n2
;
4006 /* Generate bitmap for TIM only if there are any STAs in power save
4008 if (atomic_read(&ps
->num_sta_ps
) > 0)
4009 /* in the hope that this is faster than
4010 * checking byte-for-byte */
4011 have_bits
= !bitmap_empty((unsigned long *)ps
->tim
,
4012 IEEE80211_MAX_AID
+1);
4014 if (ps
->dtim_count
== 0)
4015 ps
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
4020 tim
= pos
= skb_put(skb
, 6);
4021 *pos
++ = WLAN_EID_TIM
;
4023 *pos
++ = ps
->dtim_count
;
4024 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
4026 if (ps
->dtim_count
== 0 && !skb_queue_empty(&ps
->bc_buf
))
4029 ps
->dtim_bc_mc
= aid0
== 1;
4032 /* Find largest even number N1 so that bits numbered 1 through
4033 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4034 * (N2 + 1) x 8 through 2007 are 0. */
4036 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
4043 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
4050 /* Bitmap control */
4052 /* Part Virt Bitmap */
4053 skb_put(skb
, n2
- n1
);
4054 memcpy(pos
, ps
->tim
+ n1
, n2
- n1
+ 1);
4056 tim
[1] = n2
- n1
+ 4;
4058 *pos
++ = aid0
; /* Bitmap control */
4059 *pos
++ = 0; /* Part Virt Bitmap */
4063 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
4064 struct ps_data
*ps
, struct sk_buff
*skb
,
4067 struct ieee80211_local
*local
= sdata
->local
;
4070 * Not very nice, but we want to allow the driver to call
4071 * ieee80211_beacon_get() as a response to the set_tim()
4072 * callback. That, however, is already invoked under the
4073 * sta_lock to guarantee consistent and race-free update
4074 * of the tim bitmap in mac80211 and the driver.
4076 if (local
->tim_in_locked_section
) {
4077 __ieee80211_beacon_add_tim(sdata
, ps
, skb
, is_template
);
4079 spin_lock_bh(&local
->tim_lock
);
4080 __ieee80211_beacon_add_tim(sdata
, ps
, skb
, is_template
);
4081 spin_unlock_bh(&local
->tim_lock
);
4087 static void ieee80211_set_csa(struct ieee80211_sub_if_data
*sdata
,
4088 struct beacon_data
*beacon
)
4090 struct probe_resp
*resp
;
4092 size_t beacon_data_len
;
4094 u8 count
= beacon
->csa_current_counter
;
4096 switch (sdata
->vif
.type
) {
4097 case NL80211_IFTYPE_AP
:
4098 beacon_data
= beacon
->tail
;
4099 beacon_data_len
= beacon
->tail_len
;
4101 case NL80211_IFTYPE_ADHOC
:
4102 beacon_data
= beacon
->head
;
4103 beacon_data_len
= beacon
->head_len
;
4105 case NL80211_IFTYPE_MESH_POINT
:
4106 beacon_data
= beacon
->head
;
4107 beacon_data_len
= beacon
->head_len
;
4114 for (i
= 0; i
< IEEE80211_MAX_CSA_COUNTERS_NUM
; ++i
) {
4115 resp
= rcu_dereference(sdata
->u
.ap
.probe_resp
);
4117 if (beacon
->csa_counter_offsets
[i
]) {
4118 if (WARN_ON_ONCE(beacon
->csa_counter_offsets
[i
] >=
4124 beacon_data
[beacon
->csa_counter_offsets
[i
]] = count
;
4127 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
&& resp
)
4128 resp
->data
[resp
->csa_counter_offsets
[i
]] = count
;
4133 static u8
__ieee80211_csa_update_counter(struct beacon_data
*beacon
)
4135 beacon
->csa_current_counter
--;
4137 /* the counter should never reach 0 */
4138 WARN_ON_ONCE(!beacon
->csa_current_counter
);
4140 return beacon
->csa_current_counter
;
4143 u8
ieee80211_csa_update_counter(struct ieee80211_vif
*vif
)
4145 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4146 struct beacon_data
*beacon
= NULL
;
4151 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
4152 beacon
= rcu_dereference(sdata
->u
.ap
.beacon
);
4153 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
4154 beacon
= rcu_dereference(sdata
->u
.ibss
.presp
);
4155 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
4156 beacon
= rcu_dereference(sdata
->u
.mesh
.beacon
);
4161 count
= __ieee80211_csa_update_counter(beacon
);
4167 EXPORT_SYMBOL(ieee80211_csa_update_counter
);
4169 void ieee80211_csa_set_counter(struct ieee80211_vif
*vif
, u8 counter
)
4171 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4172 struct beacon_data
*beacon
= NULL
;
4176 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
4177 beacon
= rcu_dereference(sdata
->u
.ap
.beacon
);
4178 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
4179 beacon
= rcu_dereference(sdata
->u
.ibss
.presp
);
4180 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
4181 beacon
= rcu_dereference(sdata
->u
.mesh
.beacon
);
4186 if (counter
< beacon
->csa_current_counter
)
4187 beacon
->csa_current_counter
= counter
;
4192 EXPORT_SYMBOL(ieee80211_csa_set_counter
);
4194 bool ieee80211_csa_is_complete(struct ieee80211_vif
*vif
)
4196 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4197 struct beacon_data
*beacon
= NULL
;
4199 size_t beacon_data_len
;
4202 if (!ieee80211_sdata_running(sdata
))
4206 if (vif
->type
== NL80211_IFTYPE_AP
) {
4207 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
4209 beacon
= rcu_dereference(ap
->beacon
);
4210 if (WARN_ON(!beacon
|| !beacon
->tail
))
4212 beacon_data
= beacon
->tail
;
4213 beacon_data_len
= beacon
->tail_len
;
4214 } else if (vif
->type
== NL80211_IFTYPE_ADHOC
) {
4215 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
4217 beacon
= rcu_dereference(ifibss
->presp
);
4221 beacon_data
= beacon
->head
;
4222 beacon_data_len
= beacon
->head_len
;
4223 } else if (vif
->type
== NL80211_IFTYPE_MESH_POINT
) {
4224 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
4226 beacon
= rcu_dereference(ifmsh
->beacon
);
4230 beacon_data
= beacon
->head
;
4231 beacon_data_len
= beacon
->head_len
;
4237 if (!beacon
->csa_counter_offsets
[0])
4240 if (WARN_ON_ONCE(beacon
->csa_counter_offsets
[0] > beacon_data_len
))
4243 if (beacon_data
[beacon
->csa_counter_offsets
[0]] == 1)
4250 EXPORT_SYMBOL(ieee80211_csa_is_complete
);
4252 static struct sk_buff
*
4253 __ieee80211_beacon_get(struct ieee80211_hw
*hw
,
4254 struct ieee80211_vif
*vif
,
4255 struct ieee80211_mutable_offsets
*offs
,
4258 struct ieee80211_local
*local
= hw_to_local(hw
);
4259 struct beacon_data
*beacon
= NULL
;
4260 struct sk_buff
*skb
= NULL
;
4261 struct ieee80211_tx_info
*info
;
4262 struct ieee80211_sub_if_data
*sdata
= NULL
;
4263 enum nl80211_band band
;
4264 struct ieee80211_tx_rate_control txrc
;
4265 struct ieee80211_chanctx_conf
*chanctx_conf
;
4266 int csa_off_base
= 0;
4270 sdata
= vif_to_sdata(vif
);
4271 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4273 if (!ieee80211_sdata_running(sdata
) || !chanctx_conf
)
4277 memset(offs
, 0, sizeof(*offs
));
4279 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
4280 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
4282 beacon
= rcu_dereference(ap
->beacon
);
4284 if (beacon
->csa_counter_offsets
[0]) {
4286 __ieee80211_csa_update_counter(beacon
);
4288 ieee80211_set_csa(sdata
, beacon
);
4292 * headroom, head length,
4293 * tail length and maximum TIM length
4295 skb
= dev_alloc_skb(local
->tx_headroom
+
4297 beacon
->tail_len
+ 256 +
4298 local
->hw
.extra_beacon_tailroom
);
4302 skb_reserve(skb
, local
->tx_headroom
);
4303 skb_put_data(skb
, beacon
->head
, beacon
->head_len
);
4305 ieee80211_beacon_add_tim(sdata
, &ap
->ps
, skb
,
4309 offs
->tim_offset
= beacon
->head_len
;
4310 offs
->tim_length
= skb
->len
- beacon
->head_len
;
4312 /* for AP the csa offsets are from tail */
4313 csa_off_base
= skb
->len
;
4317 skb_put_data(skb
, beacon
->tail
,
4321 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
4322 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
4323 struct ieee80211_hdr
*hdr
;
4325 beacon
= rcu_dereference(ifibss
->presp
);
4329 if (beacon
->csa_counter_offsets
[0]) {
4331 __ieee80211_csa_update_counter(beacon
);
4333 ieee80211_set_csa(sdata
, beacon
);
4336 skb
= dev_alloc_skb(local
->tx_headroom
+ beacon
->head_len
+
4337 local
->hw
.extra_beacon_tailroom
);
4340 skb_reserve(skb
, local
->tx_headroom
);
4341 skb_put_data(skb
, beacon
->head
, beacon
->head_len
);
4343 hdr
= (struct ieee80211_hdr
*) skb
->data
;
4344 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
4345 IEEE80211_STYPE_BEACON
);
4346 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
4347 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
4349 beacon
= rcu_dereference(ifmsh
->beacon
);
4353 if (beacon
->csa_counter_offsets
[0]) {
4355 /* TODO: For mesh csa_counter is in TU, so
4356 * decrementing it by one isn't correct, but
4357 * for now we leave it consistent with overall
4358 * mac80211's behavior.
4360 __ieee80211_csa_update_counter(beacon
);
4362 ieee80211_set_csa(sdata
, beacon
);
4365 if (ifmsh
->sync_ops
)
4366 ifmsh
->sync_ops
->adjust_tsf(sdata
, beacon
);
4368 skb
= dev_alloc_skb(local
->tx_headroom
+
4372 local
->hw
.extra_beacon_tailroom
);
4375 skb_reserve(skb
, local
->tx_headroom
);
4376 skb_put_data(skb
, beacon
->head
, beacon
->head_len
);
4377 ieee80211_beacon_add_tim(sdata
, &ifmsh
->ps
, skb
, is_template
);
4380 offs
->tim_offset
= beacon
->head_len
;
4381 offs
->tim_length
= skb
->len
- beacon
->head_len
;
4384 skb_put_data(skb
, beacon
->tail
, beacon
->tail_len
);
4391 if (offs
&& beacon
) {
4394 for (i
= 0; i
< IEEE80211_MAX_CSA_COUNTERS_NUM
; i
++) {
4395 u16 csa_off
= beacon
->csa_counter_offsets
[i
];
4400 offs
->csa_counter_offs
[i
] = csa_off_base
+ csa_off
;
4404 band
= chanctx_conf
->def
.chan
->band
;
4406 info
= IEEE80211_SKB_CB(skb
);
4408 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
4409 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
4412 memset(&txrc
, 0, sizeof(txrc
));
4414 txrc
.sband
= local
->hw
.wiphy
->bands
[band
];
4415 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
4417 txrc
.reported_rate
.idx
= -1;
4418 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
4420 rate_control_get_rate(sdata
, NULL
, &txrc
);
4422 info
->control
.vif
= vif
;
4424 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
4425 IEEE80211_TX_CTL_ASSIGN_SEQ
|
4426 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
4434 ieee80211_beacon_get_template(struct ieee80211_hw
*hw
,
4435 struct ieee80211_vif
*vif
,
4436 struct ieee80211_mutable_offsets
*offs
)
4438 return __ieee80211_beacon_get(hw
, vif
, offs
, true);
4440 EXPORT_SYMBOL(ieee80211_beacon_get_template
);
4442 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
4443 struct ieee80211_vif
*vif
,
4444 u16
*tim_offset
, u16
*tim_length
)
4446 struct ieee80211_mutable_offsets offs
= {};
4447 struct sk_buff
*bcn
= __ieee80211_beacon_get(hw
, vif
, &offs
, false);
4448 struct sk_buff
*copy
;
4449 struct ieee80211_supported_band
*sband
;
4456 *tim_offset
= offs
.tim_offset
;
4459 *tim_length
= offs
.tim_length
;
4461 if (ieee80211_hw_check(hw
, BEACON_TX_STATUS
) ||
4462 !hw_to_local(hw
)->monitors
)
4465 /* send a copy to monitor interfaces */
4466 copy
= skb_copy(bcn
, GFP_ATOMIC
);
4470 shift
= ieee80211_vif_get_shift(vif
);
4471 sband
= ieee80211_get_sband(vif_to_sdata(vif
));
4475 ieee80211_tx_monitor(hw_to_local(hw
), copy
, sband
, 1, shift
, false);
4479 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
4481 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
4482 struct ieee80211_vif
*vif
)
4484 struct ieee80211_if_ap
*ap
= NULL
;
4485 struct sk_buff
*skb
= NULL
;
4486 struct probe_resp
*presp
= NULL
;
4487 struct ieee80211_hdr
*hdr
;
4488 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4490 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
4496 presp
= rcu_dereference(ap
->probe_resp
);
4500 skb
= dev_alloc_skb(presp
->len
);
4504 skb_put_data(skb
, presp
->data
, presp
->len
);
4506 hdr
= (struct ieee80211_hdr
*) skb
->data
;
4507 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
4513 EXPORT_SYMBOL(ieee80211_proberesp_get
);
4515 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
4516 struct ieee80211_vif
*vif
)
4518 struct ieee80211_sub_if_data
*sdata
;
4519 struct ieee80211_if_managed
*ifmgd
;
4520 struct ieee80211_pspoll
*pspoll
;
4521 struct ieee80211_local
*local
;
4522 struct sk_buff
*skb
;
4524 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
4527 sdata
= vif_to_sdata(vif
);
4528 ifmgd
= &sdata
->u
.mgd
;
4529 local
= sdata
->local
;
4531 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
4535 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
4537 pspoll
= skb_put_zero(skb
, sizeof(*pspoll
));
4538 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
4539 IEEE80211_STYPE_PSPOLL
);
4540 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
4542 /* aid in PS-Poll has its two MSBs each set to 1 */
4543 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
4545 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
4546 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
4550 EXPORT_SYMBOL(ieee80211_pspoll_get
);
4552 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
4553 struct ieee80211_vif
*vif
,
4556 struct ieee80211_hdr_3addr
*nullfunc
;
4557 struct ieee80211_sub_if_data
*sdata
;
4558 struct ieee80211_if_managed
*ifmgd
;
4559 struct ieee80211_local
*local
;
4560 struct sk_buff
*skb
;
4563 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
4566 sdata
= vif_to_sdata(vif
);
4567 ifmgd
= &sdata
->u
.mgd
;
4568 local
= sdata
->local
;
4571 struct sta_info
*sta
;
4574 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
4575 qos
= sta
&& sta
->sta
.wme
;
4579 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
4580 sizeof(*nullfunc
) + 2);
4584 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
4586 nullfunc
= skb_put_zero(skb
, sizeof(*nullfunc
));
4587 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
4588 IEEE80211_STYPE_NULLFUNC
|
4589 IEEE80211_FCTL_TODS
);
4591 __le16 qoshdr
= cpu_to_le16(7);
4593 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC
|
4594 IEEE80211_STYPE_NULLFUNC
) !=
4595 IEEE80211_STYPE_QOS_NULLFUNC
);
4596 nullfunc
->frame_control
|=
4597 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC
);
4599 skb_set_queue_mapping(skb
, IEEE80211_AC_VO
);
4600 skb_put_data(skb
, &qoshdr
, sizeof(qoshdr
));
4603 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
4604 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
4605 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
4609 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
4611 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
4613 const u8
*ssid
, size_t ssid_len
,
4616 struct ieee80211_local
*local
= hw_to_local(hw
);
4617 struct ieee80211_hdr_3addr
*hdr
;
4618 struct sk_buff
*skb
;
4622 ie_ssid_len
= 2 + ssid_len
;
4624 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
4625 ie_ssid_len
+ tailroom
);
4629 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
4631 hdr
= skb_put_zero(skb
, sizeof(*hdr
));
4632 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
4633 IEEE80211_STYPE_PROBE_REQ
);
4634 eth_broadcast_addr(hdr
->addr1
);
4635 memcpy(hdr
->addr2
, src_addr
, ETH_ALEN
);
4636 eth_broadcast_addr(hdr
->addr3
);
4638 pos
= skb_put(skb
, ie_ssid_len
);
4639 *pos
++ = WLAN_EID_SSID
;
4642 memcpy(pos
, ssid
, ssid_len
);
4647 EXPORT_SYMBOL(ieee80211_probereq_get
);
4649 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
4650 const void *frame
, size_t frame_len
,
4651 const struct ieee80211_tx_info
*frame_txctl
,
4652 struct ieee80211_rts
*rts
)
4654 const struct ieee80211_hdr
*hdr
= frame
;
4656 rts
->frame_control
=
4657 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
4658 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
4660 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
4661 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
4663 EXPORT_SYMBOL(ieee80211_rts_get
);
4665 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
4666 const void *frame
, size_t frame_len
,
4667 const struct ieee80211_tx_info
*frame_txctl
,
4668 struct ieee80211_cts
*cts
)
4670 const struct ieee80211_hdr
*hdr
= frame
;
4672 cts
->frame_control
=
4673 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
4674 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
4675 frame_len
, frame_txctl
);
4676 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
4678 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
4681 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
4682 struct ieee80211_vif
*vif
)
4684 struct ieee80211_local
*local
= hw_to_local(hw
);
4685 struct sk_buff
*skb
= NULL
;
4686 struct ieee80211_tx_data tx
;
4687 struct ieee80211_sub_if_data
*sdata
;
4689 struct ieee80211_tx_info
*info
;
4690 struct ieee80211_chanctx_conf
*chanctx_conf
;
4692 sdata
= vif_to_sdata(vif
);
4695 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4700 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
4701 struct beacon_data
*beacon
=
4702 rcu_dereference(sdata
->u
.ap
.beacon
);
4704 if (!beacon
|| !beacon
->head
)
4707 ps
= &sdata
->u
.ap
.ps
;
4708 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
4709 ps
= &sdata
->u
.mesh
.ps
;
4714 if (ps
->dtim_count
!= 0 || !ps
->dtim_bc_mc
)
4715 goto out
; /* send buffered bc/mc only after DTIM beacon */
4718 skb
= skb_dequeue(&ps
->bc_buf
);
4721 local
->total_ps_buffered
--;
4723 if (!skb_queue_empty(&ps
->bc_buf
) && skb
->len
>= 2) {
4724 struct ieee80211_hdr
*hdr
=
4725 (struct ieee80211_hdr
*) skb
->data
;
4726 /* more buffered multicast/broadcast frames ==> set
4727 * MoreData flag in IEEE 802.11 header to inform PS
4729 hdr
->frame_control
|=
4730 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
4733 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
4734 sdata
= IEEE80211_DEV_TO_SUB_IF(skb
->dev
);
4735 if (!ieee80211_tx_prepare(sdata
, &tx
, NULL
, skb
))
4737 ieee80211_free_txskb(hw
, skb
);
4740 info
= IEEE80211_SKB_CB(skb
);
4742 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
4743 info
->band
= chanctx_conf
->def
.chan
->band
;
4745 if (invoke_tx_handlers(&tx
))
4752 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
4754 int ieee80211_reserve_tid(struct ieee80211_sta
*pubsta
, u8 tid
)
4756 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
4757 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
4758 struct ieee80211_local
*local
= sdata
->local
;
4762 lockdep_assert_held(&local
->sta_mtx
);
4764 /* only some cases are supported right now */
4765 switch (sdata
->vif
.type
) {
4766 case NL80211_IFTYPE_STATION
:
4767 case NL80211_IFTYPE_AP
:
4768 case NL80211_IFTYPE_AP_VLAN
:
4775 if (WARN_ON(tid
>= IEEE80211_NUM_UPS
))
4778 if (sta
->reserved_tid
== tid
) {
4783 if (sta
->reserved_tid
!= IEEE80211_TID_UNRESERVED
) {
4784 sdata_err(sdata
, "TID reservation already active\n");
4789 ieee80211_stop_vif_queues(sdata
->local
, sdata
,
4790 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID
);
4794 /* Tear down BA sessions so we stop aggregating on this TID */
4795 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
)) {
4796 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
4797 __ieee80211_stop_tx_ba_session(sta
, tid
,
4798 AGG_STOP_LOCAL_REQUEST
);
4801 queues
= BIT(sdata
->vif
.hw_queue
[ieee802_1d_to_ac
[tid
]]);
4802 __ieee80211_flush_queues(local
, sdata
, queues
, false);
4804 sta
->reserved_tid
= tid
;
4806 ieee80211_wake_vif_queues(local
, sdata
,
4807 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID
);
4809 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
))
4810 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
4816 EXPORT_SYMBOL(ieee80211_reserve_tid
);
4818 void ieee80211_unreserve_tid(struct ieee80211_sta
*pubsta
, u8 tid
)
4820 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
4821 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
4823 lockdep_assert_held(&sdata
->local
->sta_mtx
);
4825 /* only some cases are supported right now */
4826 switch (sdata
->vif
.type
) {
4827 case NL80211_IFTYPE_STATION
:
4828 case NL80211_IFTYPE_AP
:
4829 case NL80211_IFTYPE_AP_VLAN
:
4836 if (tid
!= sta
->reserved_tid
) {
4837 sdata_err(sdata
, "TID to unreserve (%d) isn't reserved\n", tid
);
4841 sta
->reserved_tid
= IEEE80211_TID_UNRESERVED
;
4843 EXPORT_SYMBOL(ieee80211_unreserve_tid
);
4845 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data
*sdata
,
4846 struct sk_buff
*skb
, int tid
,
4847 enum nl80211_band band
, u32 txdata_flags
)
4849 int ac
= ieee80211_ac_from_tid(tid
);
4851 skb_reset_mac_header(skb
);
4852 skb_set_queue_mapping(skb
, ac
);
4853 skb
->priority
= tid
;
4855 skb
->dev
= sdata
->dev
;
4858 * The other path calling ieee80211_xmit is from the tasklet,
4859 * and while we can handle concurrent transmissions locking
4860 * requirements are that we do not come into tx with bhs on.
4863 IEEE80211_SKB_CB(skb
)->band
= band
;
4864 ieee80211_xmit(sdata
, NULL
, skb
, txdata_flags
);
4868 int ieee80211_tx_control_port(struct wiphy
*wiphy
, struct net_device
*dev
,
4869 const u8
*buf
, size_t len
,
4870 const u8
*dest
, __be16 proto
, bool unencrypted
)
4872 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
4873 struct ieee80211_local
*local
= sdata
->local
;
4874 struct sk_buff
*skb
;
4875 struct ethhdr
*ehdr
;
4878 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
4879 * or Pre-Authentication
4881 if (proto
!= sdata
->control_port_protocol
&&
4882 proto
!= cpu_to_be16(ETH_P_PREAUTH
))
4886 flags
= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
4890 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
4891 sizeof(struct ethhdr
) + len
);
4895 skb_reserve(skb
, local
->hw
.extra_tx_headroom
+ sizeof(struct ethhdr
));
4897 skb_put_data(skb
, buf
, len
);
4899 ehdr
= skb_push(skb
, sizeof(struct ethhdr
));
4900 memcpy(ehdr
->h_dest
, dest
, ETH_ALEN
);
4901 memcpy(ehdr
->h_source
, sdata
->vif
.addr
, ETH_ALEN
);
4902 ehdr
->h_proto
= proto
;
4905 skb
->protocol
= htons(ETH_P_802_3
);
4906 skb_reset_network_header(skb
);
4907 skb_reset_mac_header(skb
);
4910 __ieee80211_subif_start_xmit(skb
, skb
->dev
, flags
);