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
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 * Transmit and frame generation functions.
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/bitmap.h>
21 #include <linux/rcupdate.h>
22 #include <linux/export.h>
23 #include <net/net_namespace.h>
24 #include <net/ieee80211_radiotap.h>
25 #include <net/cfg80211.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28 #include <net/fq_impl.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
41 static inline void ieee80211_tx_stats(struct net_device
*dev
, u32 len
)
43 struct pcpu_sw_netstats
*tstats
= this_cpu_ptr(dev
->tstats
);
45 u64_stats_update_begin(&tstats
->syncp
);
47 tstats
->tx_bytes
+= len
;
48 u64_stats_update_end(&tstats
->syncp
);
51 static __le16
ieee80211_duration(struct ieee80211_tx_data
*tx
,
52 struct sk_buff
*skb
, int group_addr
,
55 int rate
, mrate
, erp
, dur
, i
, shift
= 0;
56 struct ieee80211_rate
*txrate
;
57 struct ieee80211_local
*local
= tx
->local
;
58 struct ieee80211_supported_band
*sband
;
59 struct ieee80211_hdr
*hdr
;
60 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
61 struct ieee80211_chanctx_conf
*chanctx_conf
;
65 chanctx_conf
= rcu_dereference(tx
->sdata
->vif
.chanctx_conf
);
67 shift
= ieee80211_chandef_get_shift(&chanctx_conf
->def
);
68 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
72 /* assume HW handles this */
73 if (tx
->rate
.flags
& (IEEE80211_TX_RC_MCS
| IEEE80211_TX_RC_VHT_MCS
))
77 if (WARN_ON_ONCE(tx
->rate
.idx
< 0))
80 sband
= local
->hw
.wiphy
->bands
[info
->band
];
81 txrate
= &sband
->bitrates
[tx
->rate
.idx
];
83 erp
= txrate
->flags
& IEEE80211_RATE_ERP_G
;
86 * data and mgmt (except PS Poll):
88 * - during contention period:
89 * if addr1 is group address: 0
90 * if more fragments = 0 and addr1 is individual address: time to
91 * transmit one ACK plus SIFS
92 * if more fragments = 1 and addr1 is individual address: time to
93 * transmit next fragment plus 2 x ACK plus 3 x SIFS
96 * - control response frame (CTS or ACK) shall be transmitted using the
97 * same rate as the immediately previous frame in the frame exchange
98 * sequence, if this rate belongs to the PHY mandatory rates, or else
99 * at the highest possible rate belonging to the PHY rates in the
102 hdr
= (struct ieee80211_hdr
*)skb
->data
;
103 if (ieee80211_is_ctl(hdr
->frame_control
)) {
104 /* TODO: These control frames are not currently sent by
105 * mac80211, but should they be implemented, this function
106 * needs to be updated to support duration field calculation.
108 * RTS: time needed to transmit pending data/mgmt frame plus
109 * one CTS frame plus one ACK frame plus 3 x SIFS
110 * CTS: duration of immediately previous RTS minus time
111 * required to transmit CTS and its SIFS
112 * ACK: 0 if immediately previous directed data/mgmt had
113 * more=0, with more=1 duration in ACK frame is duration
114 * from previous frame minus time needed to transmit ACK
116 * PS Poll: BIT(15) | BIT(14) | aid
122 if (0 /* FIX: data/mgmt during CFP */)
123 return cpu_to_le16(32768);
125 if (group_addr
) /* Group address as the destination - no ACK */
128 /* Individual destination address:
129 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
130 * CTS and ACK frames shall be transmitted using the highest rate in
131 * basic rate set that is less than or equal to the rate of the
132 * immediately previous frame and that is using the same modulation
133 * (CCK or OFDM). If no basic rate set matches with these requirements,
134 * the highest mandatory rate of the PHY that is less than or equal to
135 * the rate of the previous frame is used.
136 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
139 /* use lowest available if everything fails */
140 mrate
= sband
->bitrates
[0].bitrate
;
141 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
142 struct ieee80211_rate
*r
= &sband
->bitrates
[i
];
144 if (r
->bitrate
> txrate
->bitrate
)
147 if ((rate_flags
& r
->flags
) != rate_flags
)
150 if (tx
->sdata
->vif
.bss_conf
.basic_rates
& BIT(i
))
151 rate
= DIV_ROUND_UP(r
->bitrate
, 1 << shift
);
153 switch (sband
->band
) {
154 case NL80211_BAND_2GHZ
: {
156 if (tx
->sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
157 flag
= IEEE80211_RATE_MANDATORY_G
;
159 flag
= IEEE80211_RATE_MANDATORY_B
;
164 case NL80211_BAND_5GHZ
:
165 if (r
->flags
& IEEE80211_RATE_MANDATORY_A
)
168 case NL80211_BAND_60GHZ
:
169 /* TODO, for now fall through */
170 case NUM_NL80211_BANDS
:
176 /* No matching basic rate found; use highest suitable mandatory
178 rate
= DIV_ROUND_UP(mrate
, 1 << shift
);
181 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
182 if (ieee80211_is_data_qos(hdr
->frame_control
) &&
183 *(ieee80211_get_qos_ctl(hdr
)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK
)
186 /* Time needed to transmit ACK
187 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
188 * to closest integer */
189 dur
= ieee80211_frame_duration(sband
->band
, 10, rate
, erp
,
190 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
194 /* Frame is fragmented: duration increases with time needed to
195 * transmit next fragment plus ACK and 2 x SIFS. */
196 dur
*= 2; /* ACK + SIFS */
198 dur
+= ieee80211_frame_duration(sband
->band
, next_frag_len
,
199 txrate
->bitrate
, erp
,
200 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
204 return cpu_to_le16(dur
);
208 static ieee80211_tx_result debug_noinline
209 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data
*tx
)
211 struct ieee80211_local
*local
= tx
->local
;
212 struct ieee80211_if_managed
*ifmgd
;
214 /* driver doesn't support power save */
215 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
))
218 /* hardware does dynamic power save */
219 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
))
222 /* dynamic power save disabled */
223 if (local
->hw
.conf
.dynamic_ps_timeout
<= 0)
226 /* we are scanning, don't enable power save */
230 if (!local
->ps_sdata
)
233 /* No point if we're going to suspend */
234 if (local
->quiescing
)
237 /* dynamic ps is supported only in managed mode */
238 if (tx
->sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
241 ifmgd
= &tx
->sdata
->u
.mgd
;
244 * Don't wakeup from power save if u-apsd is enabled, voip ac has
245 * u-apsd enabled and the frame is in voip class. This effectively
246 * means that even if all access categories have u-apsd enabled, in
247 * practise u-apsd is only used with the voip ac. This is a
248 * workaround for the case when received voip class packets do not
249 * have correct qos tag for some reason, due the network or the
252 * Note: ifmgd->uapsd_queues access is racy here. If the value is
253 * changed via debugfs, user needs to reassociate manually to have
254 * everything in sync.
256 if ((ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
) &&
257 (ifmgd
->uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
) &&
258 skb_get_queue_mapping(tx
->skb
) == IEEE80211_AC_VO
)
261 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
262 ieee80211_stop_queues_by_reason(&local
->hw
,
263 IEEE80211_MAX_QUEUE_MAP
,
264 IEEE80211_QUEUE_STOP_REASON_PS
,
266 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
267 ieee80211_queue_work(&local
->hw
,
268 &local
->dynamic_ps_disable_work
);
271 /* Don't restart the timer if we're not disassociated */
272 if (!ifmgd
->associated
)
275 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
276 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
281 static ieee80211_tx_result debug_noinline
282 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data
*tx
)
285 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
286 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
289 if (unlikely(info
->flags
& IEEE80211_TX_CTL_INJECTED
))
292 if (unlikely(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
)) &&
293 test_bit(SDATA_STATE_OFFCHANNEL
, &tx
->sdata
->state
) &&
294 !ieee80211_is_probe_req(hdr
->frame_control
) &&
295 !ieee80211_is_nullfunc(hdr
->frame_control
))
297 * When software scanning only nullfunc frames (to notify
298 * the sleep state to the AP) and probe requests (for the
299 * active scan) are allowed, all other frames should not be
300 * sent and we should not get here, but if we do
301 * nonetheless, drop them to avoid sending them
302 * off-channel. See the link below and
303 * ieee80211_start_scan() for more.
305 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
309 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
)
312 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
315 if (tx
->flags
& IEEE80211_TX_PS_BUFFERED
)
319 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
321 if (likely(tx
->flags
& IEEE80211_TX_UNICAST
)) {
322 if (unlikely(!assoc
&&
323 ieee80211_is_data(hdr
->frame_control
))) {
324 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
325 sdata_info(tx
->sdata
,
326 "dropped data frame to not associated station %pM\n",
329 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
332 } else if (unlikely(tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
333 ieee80211_is_data(hdr
->frame_control
) &&
334 !atomic_read(&tx
->sdata
->u
.ap
.num_mcast_sta
))) {
336 * No associated STAs - no need to send multicast
345 /* This function is called whenever the AP is about to exceed the maximum limit
346 * of buffered frames for power saving STAs. This situation should not really
347 * happen often during normal operation, so dropping the oldest buffered packet
348 * from each queue should be OK to make some room for new frames. */
349 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
351 int total
= 0, purged
= 0;
353 struct ieee80211_sub_if_data
*sdata
;
354 struct sta_info
*sta
;
356 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
359 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
360 ps
= &sdata
->u
.ap
.ps
;
361 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
362 ps
= &sdata
->u
.mesh
.ps
;
366 skb
= skb_dequeue(&ps
->bc_buf
);
371 total
+= skb_queue_len(&ps
->bc_buf
);
375 * Drop one frame from each station from the lowest-priority
376 * AC that has frames at all.
378 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
381 for (ac
= IEEE80211_AC_BK
; ac
>= IEEE80211_AC_VO
; ac
--) {
382 skb
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
383 total
+= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
386 ieee80211_free_txskb(&local
->hw
, skb
);
392 local
->total_ps_buffered
= total
;
393 ps_dbg_hw(&local
->hw
, "PS buffers full - purged %d frames\n", purged
);
396 static ieee80211_tx_result
397 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data
*tx
)
399 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
400 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
404 * broadcast/multicast frame
406 * If any of the associated/peer stations is in power save mode,
407 * the frame is buffered to be sent after DTIM beacon frame.
408 * This is done either by the hardware or us.
411 /* powersaving STAs currently only in AP/VLAN/mesh mode */
412 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
413 tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
417 ps
= &tx
->sdata
->bss
->ps
;
418 } else if (ieee80211_vif_is_mesh(&tx
->sdata
->vif
)) {
419 ps
= &tx
->sdata
->u
.mesh
.ps
;
425 /* no buffering for ordered frames */
426 if (ieee80211_has_order(hdr
->frame_control
))
429 if (ieee80211_is_probe_req(hdr
->frame_control
))
432 if (ieee80211_hw_check(&tx
->local
->hw
, QUEUE_CONTROL
))
433 info
->hw_queue
= tx
->sdata
->vif
.cab_queue
;
435 /* no stations in PS mode */
436 if (!atomic_read(&ps
->num_sta_ps
))
439 info
->flags
|= IEEE80211_TX_CTL_SEND_AFTER_DTIM
;
441 /* device releases frame after DTIM beacon */
442 if (!ieee80211_hw_check(&tx
->local
->hw
, HOST_BROADCAST_PS_BUFFERING
))
445 /* buffered in mac80211 */
446 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
447 purge_old_ps_buffers(tx
->local
);
449 if (skb_queue_len(&ps
->bc_buf
) >= AP_MAX_BC_BUFFER
) {
451 "BC TX buffer full - dropping the oldest frame\n");
452 dev_kfree_skb(skb_dequeue(&ps
->bc_buf
));
454 tx
->local
->total_ps_buffered
++;
456 skb_queue_tail(&ps
->bc_buf
, tx
->skb
);
461 static int ieee80211_use_mfp(__le16 fc
, struct sta_info
*sta
,
464 if (!ieee80211_is_mgmt(fc
))
467 if (sta
== NULL
|| !test_sta_flag(sta
, WLAN_STA_MFP
))
470 if (!ieee80211_is_robust_mgmt_frame(skb
))
476 static ieee80211_tx_result
477 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data
*tx
)
479 struct sta_info
*sta
= tx
->sta
;
480 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
481 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
482 struct ieee80211_local
*local
= tx
->local
;
487 if (unlikely((test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
488 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
489 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) &&
490 !(info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
))) {
491 int ac
= skb_get_queue_mapping(tx
->skb
);
493 if (ieee80211_is_mgmt(hdr
->frame_control
) &&
494 !ieee80211_is_bufferable_mmpdu(hdr
->frame_control
)) {
495 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
499 ps_dbg(sta
->sdata
, "STA %pM aid %d: PS buffer for AC %d\n",
500 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
501 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
502 purge_old_ps_buffers(tx
->local
);
504 /* sync with ieee80211_sta_ps_deliver_wakeup */
505 spin_lock(&sta
->ps_lock
);
507 * STA woke up the meantime and all the frames on ps_tx_buf have
508 * been queued to pending queue. No reordering can happen, go
509 * ahead and Tx the packet.
511 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
) &&
512 !test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) &&
513 !test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) {
514 spin_unlock(&sta
->ps_lock
);
518 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
519 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
521 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
523 ieee80211_free_txskb(&local
->hw
, old
);
525 tx
->local
->total_ps_buffered
++;
527 info
->control
.jiffies
= jiffies
;
528 info
->control
.vif
= &tx
->sdata
->vif
;
529 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
530 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
531 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
532 spin_unlock(&sta
->ps_lock
);
534 if (!timer_pending(&local
->sta_cleanup
))
535 mod_timer(&local
->sta_cleanup
,
536 round_jiffies(jiffies
+
537 STA_INFO_CLEANUP_INTERVAL
));
540 * We queued up some frames, so the TIM bit might
541 * need to be set, recalculate it.
543 sta_info_recalc_tim(sta
);
546 } else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
548 "STA %pM in PS mode, but polling/in SP -> send frame\n",
555 static ieee80211_tx_result debug_noinline
556 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
558 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
561 if (tx
->flags
& IEEE80211_TX_UNICAST
)
562 return ieee80211_tx_h_unicast_ps_buf(tx
);
564 return ieee80211_tx_h_multicast_ps_buf(tx
);
567 static ieee80211_tx_result debug_noinline
568 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
570 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
572 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
)) {
573 if (tx
->sdata
->control_port_no_encrypt
)
574 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
575 info
->control
.flags
|= IEEE80211_TX_CTRL_PORT_CTRL_PROTO
;
576 info
->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
582 static ieee80211_tx_result debug_noinline
583 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
585 struct ieee80211_key
*key
;
586 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
587 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
589 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
))
592 (key
= rcu_dereference(tx
->sta
->ptk
[tx
->sta
->ptk_idx
])))
594 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
595 is_multicast_ether_addr(hdr
->addr1
) &&
596 ieee80211_is_robust_mgmt_frame(tx
->skb
) &&
597 (key
= rcu_dereference(tx
->sdata
->default_mgmt_key
)))
599 else if (is_multicast_ether_addr(hdr
->addr1
) &&
600 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
602 else if (!is_multicast_ether_addr(hdr
->addr1
) &&
603 (key
= rcu_dereference(tx
->sdata
->default_unicast_key
)))
609 bool skip_hw
= false;
611 /* TODO: add threshold stuff again */
613 switch (tx
->key
->conf
.cipher
) {
614 case WLAN_CIPHER_SUITE_WEP40
:
615 case WLAN_CIPHER_SUITE_WEP104
:
616 case WLAN_CIPHER_SUITE_TKIP
:
617 if (!ieee80211_is_data_present(hdr
->frame_control
))
620 case WLAN_CIPHER_SUITE_CCMP
:
621 case WLAN_CIPHER_SUITE_CCMP_256
:
622 case WLAN_CIPHER_SUITE_GCMP
:
623 case WLAN_CIPHER_SUITE_GCMP_256
:
624 if (!ieee80211_is_data_present(hdr
->frame_control
) &&
625 !ieee80211_use_mfp(hdr
->frame_control
, tx
->sta
,
629 skip_hw
= (tx
->key
->conf
.flags
&
630 IEEE80211_KEY_FLAG_SW_MGMT_TX
) &&
631 ieee80211_is_mgmt(hdr
->frame_control
);
633 case WLAN_CIPHER_SUITE_AES_CMAC
:
634 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
635 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
636 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
637 if (!ieee80211_is_mgmt(hdr
->frame_control
))
642 if (unlikely(tx
->key
&& tx
->key
->flags
& KEY_FLAG_TAINTED
&&
643 !ieee80211_is_deauth(hdr
->frame_control
)))
646 if (!skip_hw
&& tx
->key
&&
647 tx
->key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
)
648 info
->control
.hw_key
= &tx
->key
->conf
;
654 static ieee80211_tx_result debug_noinline
655 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data
*tx
)
657 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
658 struct ieee80211_hdr
*hdr
= (void *)tx
->skb
->data
;
659 struct ieee80211_supported_band
*sband
;
661 struct ieee80211_tx_rate_control txrc
;
662 struct ieee80211_sta_rates
*ratetbl
= NULL
;
665 memset(&txrc
, 0, sizeof(txrc
));
667 sband
= tx
->local
->hw
.wiphy
->bands
[info
->band
];
669 len
= min_t(u32
, tx
->skb
->len
+ FCS_LEN
,
670 tx
->local
->hw
.wiphy
->frag_threshold
);
672 /* set up the tx rate control struct we give the RC algo */
673 txrc
.hw
= &tx
->local
->hw
;
675 txrc
.bss_conf
= &tx
->sdata
->vif
.bss_conf
;
677 txrc
.reported_rate
.idx
= -1;
678 txrc
.rate_idx_mask
= tx
->sdata
->rc_rateidx_mask
[info
->band
];
679 if (txrc
.rate_idx_mask
== (1 << sband
->n_bitrates
) - 1)
680 txrc
.max_rate_idx
= -1;
682 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
684 if (tx
->sdata
->rc_has_mcs_mask
[info
->band
])
685 txrc
.rate_idx_mcs_mask
=
686 tx
->sdata
->rc_rateidx_mcs_mask
[info
->band
];
688 txrc
.bss
= (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
689 tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
||
690 tx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
||
691 tx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
);
693 /* set up RTS protection if desired */
694 if (len
> tx
->local
->hw
.wiphy
->rts_threshold
) {
698 info
->control
.use_rts
= txrc
.rts
;
699 info
->control
.use_cts_prot
= tx
->sdata
->vif
.bss_conf
.use_cts_prot
;
702 * Use short preamble if the BSS can handle it, but not for
703 * management frames unless we know the receiver can handle
704 * that -- the management frame might be to a station that
705 * just wants a probe response.
707 if (tx
->sdata
->vif
.bss_conf
.use_short_preamble
&&
708 (ieee80211_is_data(hdr
->frame_control
) ||
709 (tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_SHORT_PREAMBLE
))))
710 txrc
.short_preamble
= true;
712 info
->control
.short_preamble
= txrc
.short_preamble
;
714 /* don't ask rate control when rate already injected via radiotap */
715 if (info
->control
.flags
& IEEE80211_TX_CTRL_RATE_INJECT
)
719 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
722 * Lets not bother rate control if we're associated and cannot
723 * talk to the sta. This should not happen.
725 if (WARN(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
) && assoc
&&
726 !rate_usable_index_exists(sband
, &tx
->sta
->sta
),
727 "%s: Dropped data frame as no usable bitrate found while "
728 "scanning and associated. Target station: "
729 "%pM on %d GHz band\n",
730 tx
->sdata
->name
, hdr
->addr1
,
735 * If we're associated with the sta at this point we know we can at
736 * least send the frame at the lowest bit rate.
738 rate_control_get_rate(tx
->sdata
, tx
->sta
, &txrc
);
740 if (tx
->sta
&& !info
->control
.skip_table
)
741 ratetbl
= rcu_dereference(tx
->sta
->sta
.rates
);
743 if (unlikely(info
->control
.rates
[0].idx
< 0)) {
745 struct ieee80211_tx_rate rate
= {
746 .idx
= ratetbl
->rate
[0].idx
,
747 .flags
= ratetbl
->rate
[0].flags
,
748 .count
= ratetbl
->rate
[0].count
751 if (ratetbl
->rate
[0].idx
< 0)
759 tx
->rate
= info
->control
.rates
[0];
762 if (txrc
.reported_rate
.idx
< 0) {
763 txrc
.reported_rate
= tx
->rate
;
764 if (tx
->sta
&& ieee80211_is_data(hdr
->frame_control
))
765 tx
->sta
->tx_stats
.last_rate
= txrc
.reported_rate
;
767 tx
->sta
->tx_stats
.last_rate
= txrc
.reported_rate
;
772 if (unlikely(!info
->control
.rates
[0].count
))
773 info
->control
.rates
[0].count
= 1;
775 if (WARN_ON_ONCE((info
->control
.rates
[0].count
> 1) &&
776 (info
->flags
& IEEE80211_TX_CTL_NO_ACK
)))
777 info
->control
.rates
[0].count
= 1;
782 static __le16
ieee80211_tx_next_seq(struct sta_info
*sta
, int tid
)
784 u16
*seq
= &sta
->tid_seq
[tid
];
785 __le16 ret
= cpu_to_le16(*seq
);
787 /* Increase the sequence number. */
788 *seq
= (*seq
+ 0x10) & IEEE80211_SCTL_SEQ
;
793 static ieee80211_tx_result debug_noinline
794 ieee80211_tx_h_sequence(struct ieee80211_tx_data
*tx
)
796 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
797 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
802 * Packet injection may want to control the sequence
803 * number, if we have no matching interface then we
804 * neither assign one ourselves nor ask the driver to.
806 if (unlikely(info
->control
.vif
->type
== NL80211_IFTYPE_MONITOR
))
809 if (unlikely(ieee80211_is_ctl(hdr
->frame_control
)))
812 if (ieee80211_hdrlen(hdr
->frame_control
) < 24)
815 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
819 * Anything but QoS data that has a sequence number field
820 * (is long enough) gets a sequence number from the global
821 * counter. QoS data frames with a multicast destination
822 * also use the global counter (802.11-2012 9.3.2.10).
824 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
825 is_multicast_ether_addr(hdr
->addr1
)) {
826 /* driver should assign sequence number */
827 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
828 /* for pure STA mode without beacons, we can do it */
829 hdr
->seq_ctrl
= cpu_to_le16(tx
->sdata
->sequence_number
);
830 tx
->sdata
->sequence_number
+= 0x10;
832 tx
->sta
->tx_stats
.msdu
[IEEE80211_NUM_TIDS
]++;
837 * This should be true for injected/management frames only, for
838 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
839 * above since they are not QoS-data frames.
844 /* include per-STA, per-TID sequence counter */
846 qc
= ieee80211_get_qos_ctl(hdr
);
847 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
848 tx
->sta
->tx_stats
.msdu
[tid
]++;
850 if (!tx
->sta
->sta
.txq
[0])
851 hdr
->seq_ctrl
= ieee80211_tx_next_seq(tx
->sta
, tid
);
856 static int ieee80211_fragment(struct ieee80211_tx_data
*tx
,
857 struct sk_buff
*skb
, int hdrlen
,
860 struct ieee80211_local
*local
= tx
->local
;
861 struct ieee80211_tx_info
*info
;
863 int per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
864 int pos
= hdrlen
+ per_fragm
;
865 int rem
= skb
->len
- hdrlen
- per_fragm
;
867 if (WARN_ON(rem
< 0))
870 /* first fragment was already added to queue by caller */
873 int fraglen
= per_fragm
;
878 tmp
= dev_alloc_skb(local
->tx_headroom
+
880 tx
->sdata
->encrypt_headroom
+
881 IEEE80211_ENCRYPT_TAILROOM
);
885 __skb_queue_tail(&tx
->skbs
, tmp
);
888 local
->tx_headroom
+ tx
->sdata
->encrypt_headroom
);
890 /* copy control information */
891 memcpy(tmp
->cb
, skb
->cb
, sizeof(tmp
->cb
));
893 info
= IEEE80211_SKB_CB(tmp
);
894 info
->flags
&= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT
|
895 IEEE80211_TX_CTL_FIRST_FRAGMENT
);
898 info
->flags
|= IEEE80211_TX_CTL_MORE_FRAMES
;
900 skb_copy_queue_mapping(tmp
, skb
);
901 tmp
->priority
= skb
->priority
;
904 /* copy header and data */
905 memcpy(skb_put(tmp
, hdrlen
), skb
->data
, hdrlen
);
906 memcpy(skb_put(tmp
, fraglen
), skb
->data
+ pos
, fraglen
);
911 /* adjust first fragment's length */
912 skb_trim(skb
, hdrlen
+ per_fragm
);
916 static ieee80211_tx_result debug_noinline
917 ieee80211_tx_h_fragment(struct ieee80211_tx_data
*tx
)
919 struct sk_buff
*skb
= tx
->skb
;
920 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
921 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
922 int frag_threshold
= tx
->local
->hw
.wiphy
->frag_threshold
;
926 /* no matter what happens, tx->skb moves to tx->skbs */
927 __skb_queue_tail(&tx
->skbs
, skb
);
930 if (info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)
933 if (tx
->local
->ops
->set_frag_threshold
)
937 * Warn when submitting a fragmented A-MPDU frame and drop it.
938 * This scenario is handled in ieee80211_tx_prepare but extra
939 * caution taken here as fragmented ampdu may cause Tx stop.
941 if (WARN_ON(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
944 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
946 /* internal error, why isn't DONTFRAG set? */
947 if (WARN_ON(skb
->len
+ FCS_LEN
<= frag_threshold
))
951 * Now fragment the frame. This will allocate all the fragments and
952 * chain them (using skb as the first fragment) to skb->next.
953 * During transmission, we will remove the successfully transmitted
954 * fragments from this list. When the low-level driver rejects one
955 * of the fragments then we will simply pretend to accept the skb
956 * but store it away as pending.
958 if (ieee80211_fragment(tx
, skb
, hdrlen
, frag_threshold
))
961 /* update duration/seq/flags of fragments */
964 skb_queue_walk(&tx
->skbs
, skb
) {
965 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
967 hdr
= (void *)skb
->data
;
968 info
= IEEE80211_SKB_CB(skb
);
970 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
971 hdr
->frame_control
|= morefrags
;
973 * No multi-rate retries for fragmented frames, that
974 * would completely throw off the NAV at other STAs.
976 info
->control
.rates
[1].idx
= -1;
977 info
->control
.rates
[2].idx
= -1;
978 info
->control
.rates
[3].idx
= -1;
979 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 4);
980 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
982 hdr
->frame_control
&= ~morefrags
;
984 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
991 static ieee80211_tx_result debug_noinline
992 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
1000 skb_queue_walk(&tx
->skbs
, skb
) {
1001 ac
= skb_get_queue_mapping(skb
);
1002 tx
->sta
->tx_stats
.bytes
[ac
] += skb
->len
;
1005 tx
->sta
->tx_stats
.packets
[ac
]++;
1010 static ieee80211_tx_result debug_noinline
1011 ieee80211_tx_h_encrypt(struct ieee80211_tx_data
*tx
)
1016 switch (tx
->key
->conf
.cipher
) {
1017 case WLAN_CIPHER_SUITE_WEP40
:
1018 case WLAN_CIPHER_SUITE_WEP104
:
1019 return ieee80211_crypto_wep_encrypt(tx
);
1020 case WLAN_CIPHER_SUITE_TKIP
:
1021 return ieee80211_crypto_tkip_encrypt(tx
);
1022 case WLAN_CIPHER_SUITE_CCMP
:
1023 return ieee80211_crypto_ccmp_encrypt(
1024 tx
, IEEE80211_CCMP_MIC_LEN
);
1025 case WLAN_CIPHER_SUITE_CCMP_256
:
1026 return ieee80211_crypto_ccmp_encrypt(
1027 tx
, IEEE80211_CCMP_256_MIC_LEN
);
1028 case WLAN_CIPHER_SUITE_AES_CMAC
:
1029 return ieee80211_crypto_aes_cmac_encrypt(tx
);
1030 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
1031 return ieee80211_crypto_aes_cmac_256_encrypt(tx
);
1032 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
1033 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
1034 return ieee80211_crypto_aes_gmac_encrypt(tx
);
1035 case WLAN_CIPHER_SUITE_GCMP
:
1036 case WLAN_CIPHER_SUITE_GCMP_256
:
1037 return ieee80211_crypto_gcmp_encrypt(tx
);
1039 return ieee80211_crypto_hw_encrypt(tx
);
1045 static ieee80211_tx_result debug_noinline
1046 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data
*tx
)
1048 struct sk_buff
*skb
;
1049 struct ieee80211_hdr
*hdr
;
1053 skb_queue_walk(&tx
->skbs
, skb
) {
1054 hdr
= (void *) skb
->data
;
1055 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
)))
1056 break; /* must not overwrite AID */
1057 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1058 struct sk_buff
*next
= skb_queue_next(&tx
->skbs
, skb
);
1059 next_len
= next
->len
;
1062 group_addr
= is_multicast_ether_addr(hdr
->addr1
);
1065 ieee80211_duration(tx
, skb
, group_addr
, next_len
);
1071 /* actual transmit path */
1073 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data
*tx
,
1074 struct sk_buff
*skb
,
1075 struct ieee80211_tx_info
*info
,
1076 struct tid_ampdu_tx
*tid_tx
,
1079 bool queued
= false;
1080 bool reset_agg_timer
= false;
1081 struct sk_buff
*purge_skb
= NULL
;
1083 if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1084 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1085 reset_agg_timer
= true;
1086 } else if (test_bit(HT_AGG_STATE_WANT_START
, &tid_tx
->state
)) {
1088 * nothing -- this aggregation session is being started
1089 * but that might still fail with the driver
1091 } else if (!tx
->sta
->sta
.txq
[tid
]) {
1092 spin_lock(&tx
->sta
->lock
);
1094 * Need to re-check now, because we may get here
1096 * 1) in the window during which the setup is actually
1097 * already done, but not marked yet because not all
1098 * packets are spliced over to the driver pending
1099 * queue yet -- if this happened we acquire the lock
1100 * either before or after the splice happens, but
1101 * need to recheck which of these cases happened.
1103 * 2) during session teardown, if the OPERATIONAL bit
1104 * was cleared due to the teardown but the pointer
1105 * hasn't been assigned NULL yet (or we loaded it
1106 * before it was assigned) -- in this case it may
1107 * now be NULL which means we should just let the
1108 * packet pass through because splicing the frames
1109 * back is already done.
1111 tid_tx
= rcu_dereference_protected_tid_tx(tx
->sta
, tid
);
1114 /* do nothing, let packet pass through */
1115 } else if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1116 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1117 reset_agg_timer
= true;
1120 if (info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
) {
1121 clear_sta_flag(tx
->sta
, WLAN_STA_SP
);
1122 ps_dbg(tx
->sta
->sdata
,
1123 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1124 tx
->sta
->sta
.addr
, tx
->sta
->sta
.aid
);
1126 info
->control
.vif
= &tx
->sdata
->vif
;
1127 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1128 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
1129 __skb_queue_tail(&tid_tx
->pending
, skb
);
1130 if (skb_queue_len(&tid_tx
->pending
) > STA_MAX_TX_BUFFER
)
1131 purge_skb
= __skb_dequeue(&tid_tx
->pending
);
1133 spin_unlock(&tx
->sta
->lock
);
1136 ieee80211_free_txskb(&tx
->local
->hw
, purge_skb
);
1139 /* reset session timer */
1140 if (reset_agg_timer
&& tid_tx
->timeout
)
1141 tid_tx
->last_tx
= jiffies
;
1148 * pass %NULL for the station if unknown, a valid pointer if known
1149 * or an ERR_PTR() if the station is known not to exist
1151 static ieee80211_tx_result
1152 ieee80211_tx_prepare(struct ieee80211_sub_if_data
*sdata
,
1153 struct ieee80211_tx_data
*tx
,
1154 struct sta_info
*sta
, struct sk_buff
*skb
)
1156 struct ieee80211_local
*local
= sdata
->local
;
1157 struct ieee80211_hdr
*hdr
;
1158 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1162 memset(tx
, 0, sizeof(*tx
));
1166 __skb_queue_head_init(&tx
->skbs
);
1169 * If this flag is set to true anywhere, and we get here,
1170 * we are doing the needed processing, so remove the flag
1173 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1175 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1181 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1182 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1183 if (!tx
->sta
&& sdata
->wdev
.use_4addr
)
1185 } else if (info
->flags
& (IEEE80211_TX_INTFL_NL80211_FRAME_TX
|
1186 IEEE80211_TX_CTL_INJECTED
) ||
1187 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1188 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1190 if (!tx
->sta
&& !is_multicast_ether_addr(hdr
->addr1
))
1191 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1194 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1195 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1196 ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
) &&
1197 !ieee80211_hw_check(&local
->hw
, TX_AMPDU_SETUP_IN_HW
)) {
1198 struct tid_ampdu_tx
*tid_tx
;
1200 qc
= ieee80211_get_qos_ctl(hdr
);
1201 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
1203 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1207 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1210 if (unlikely(queued
))
1215 if (is_multicast_ether_addr(hdr
->addr1
)) {
1216 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1217 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1219 tx
->flags
|= IEEE80211_TX_UNICAST
;
1221 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1222 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1223 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1224 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1225 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1229 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1230 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
)) {
1231 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1232 ieee80211_check_fast_xmit(tx
->sta
);
1235 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1240 static struct txq_info
*ieee80211_get_txq(struct ieee80211_local
*local
,
1241 struct ieee80211_vif
*vif
,
1242 struct ieee80211_sta
*pubsta
,
1243 struct sk_buff
*skb
)
1245 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1246 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1247 struct ieee80211_txq
*txq
= NULL
;
1249 if ((info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
) ||
1250 (info
->control
.flags
& IEEE80211_TX_CTRL_PS_RESPONSE
))
1253 if (!ieee80211_is_data(hdr
->frame_control
))
1257 u8 tid
= skb
->priority
& IEEE80211_QOS_CTL_TID_MASK
;
1259 txq
= pubsta
->txq
[tid
];
1267 return to_txq_info(txq
);
1270 static struct sk_buff
*fq_tin_dequeue_func(struct fq
*fq
,
1272 struct fq_flow
*flow
)
1274 return fq_flow_dequeue(fq
, flow
);
1277 static void fq_skb_free_func(struct fq
*fq
,
1279 struct fq_flow
*flow
,
1280 struct sk_buff
*skb
)
1282 struct ieee80211_local
*local
;
1284 local
= container_of(fq
, struct ieee80211_local
, fq
);
1285 ieee80211_free_txskb(&local
->hw
, skb
);
1288 static struct fq_flow
*fq_flow_get_default_func(struct fq
*fq
,
1291 struct sk_buff
*skb
)
1293 struct txq_info
*txqi
;
1295 txqi
= container_of(tin
, struct txq_info
, tin
);
1296 return &txqi
->def_flow
;
1299 static void ieee80211_txq_enqueue(struct ieee80211_local
*local
,
1300 struct txq_info
*txqi
,
1301 struct sk_buff
*skb
)
1303 struct fq
*fq
= &local
->fq
;
1304 struct fq_tin
*tin
= &txqi
->tin
;
1306 fq_tin_enqueue(fq
, tin
, skb
,
1308 fq_flow_get_default_func
);
1311 void ieee80211_txq_init(struct ieee80211_sub_if_data
*sdata
,
1312 struct sta_info
*sta
,
1313 struct txq_info
*txqi
, int tid
)
1315 fq_tin_init(&txqi
->tin
);
1316 fq_flow_init(&txqi
->def_flow
);
1318 txqi
->txq
.vif
= &sdata
->vif
;
1321 txqi
->txq
.sta
= &sta
->sta
;
1322 sta
->sta
.txq
[tid
] = &txqi
->txq
;
1323 txqi
->txq
.tid
= tid
;
1324 txqi
->txq
.ac
= ieee802_1d_to_ac
[tid
& 7];
1326 sdata
->vif
.txq
= &txqi
->txq
;
1328 txqi
->txq
.ac
= IEEE80211_AC_BE
;
1332 void ieee80211_txq_purge(struct ieee80211_local
*local
,
1333 struct txq_info
*txqi
)
1335 struct fq
*fq
= &local
->fq
;
1336 struct fq_tin
*tin
= &txqi
->tin
;
1338 fq_tin_reset(fq
, tin
, fq_skb_free_func
);
1341 int ieee80211_txq_setup_flows(struct ieee80211_local
*local
)
1343 struct fq
*fq
= &local
->fq
;
1346 if (!local
->ops
->wake_tx_queue
)
1349 ret
= fq_init(fq
, 4096);
1356 void ieee80211_txq_teardown_flows(struct ieee80211_local
*local
)
1358 struct fq
*fq
= &local
->fq
;
1360 if (!local
->ops
->wake_tx_queue
)
1363 fq_reset(fq
, fq_skb_free_func
);
1366 struct sk_buff
*ieee80211_tx_dequeue(struct ieee80211_hw
*hw
,
1367 struct ieee80211_txq
*txq
)
1369 struct ieee80211_local
*local
= hw_to_local(hw
);
1370 struct txq_info
*txqi
= container_of(txq
, struct txq_info
, txq
);
1371 struct ieee80211_hdr
*hdr
;
1372 struct sk_buff
*skb
= NULL
;
1373 struct fq
*fq
= &local
->fq
;
1374 struct fq_tin
*tin
= &txqi
->tin
;
1376 spin_lock_bh(&fq
->lock
);
1378 if (test_bit(IEEE80211_TXQ_STOP
, &txqi
->flags
))
1381 skb
= fq_tin_dequeue(fq
, tin
, fq_tin_dequeue_func
);
1385 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1386 if (txq
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
)) {
1387 struct sta_info
*sta
= container_of(txq
->sta
, struct sta_info
,
1389 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1391 hdr
->seq_ctrl
= ieee80211_tx_next_seq(sta
, txq
->tid
);
1392 if (test_bit(IEEE80211_TXQ_AMPDU
, &txqi
->flags
))
1393 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1395 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
1399 spin_unlock_bh(&fq
->lock
);
1401 if (skb
&& skb_has_frag_list(skb
) &&
1402 !ieee80211_hw_check(&local
->hw
, TX_FRAG_LIST
))
1407 EXPORT_SYMBOL(ieee80211_tx_dequeue
);
1409 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1410 struct ieee80211_vif
*vif
,
1411 struct ieee80211_sta
*sta
,
1412 struct sk_buff_head
*skbs
,
1415 struct ieee80211_tx_control control
= {};
1416 struct fq
*fq
= &local
->fq
;
1417 struct sk_buff
*skb
, *tmp
;
1418 struct txq_info
*txqi
;
1419 unsigned long flags
;
1421 skb_queue_walk_safe(skbs
, skb
, tmp
) {
1422 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1423 int q
= info
->hw_queue
;
1425 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1426 if (WARN_ON_ONCE(q
>= local
->hw
.queues
)) {
1427 __skb_unlink(skb
, skbs
);
1428 ieee80211_free_txskb(&local
->hw
, skb
);
1433 txqi
= ieee80211_get_txq(local
, vif
, sta
, skb
);
1435 info
->control
.vif
= vif
;
1437 __skb_unlink(skb
, skbs
);
1439 spin_lock_bh(&fq
->lock
);
1440 ieee80211_txq_enqueue(local
, txqi
, skb
);
1441 spin_unlock_bh(&fq
->lock
);
1443 drv_wake_tx_queue(local
, txqi
);
1448 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1449 if (local
->queue_stop_reasons
[q
] ||
1450 (!txpending
&& !skb_queue_empty(&local
->pending
[q
]))) {
1451 if (unlikely(info
->flags
&
1452 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
)) {
1453 if (local
->queue_stop_reasons
[q
] &
1454 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL
)) {
1456 * Drop off-channel frames if queues
1457 * are stopped for any reason other
1458 * than off-channel operation. Never
1461 spin_unlock_irqrestore(
1462 &local
->queue_stop_reason_lock
,
1464 ieee80211_purge_tx_queue(&local
->hw
,
1471 * Since queue is stopped, queue up frames for
1472 * later transmission from the tx-pending
1473 * tasklet when the queue is woken again.
1476 skb_queue_splice_init(skbs
,
1477 &local
->pending
[q
]);
1479 skb_queue_splice_tail_init(skbs
,
1480 &local
->pending
[q
]);
1482 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1487 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1489 info
->control
.vif
= vif
;
1492 __skb_unlink(skb
, skbs
);
1493 drv_tx(local
, &control
, skb
);
1500 * Returns false if the frame couldn't be transmitted but was queued instead.
1502 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1503 struct sk_buff_head
*skbs
, int led_len
,
1504 struct sta_info
*sta
, bool txpending
)
1506 struct ieee80211_tx_info
*info
;
1507 struct ieee80211_sub_if_data
*sdata
;
1508 struct ieee80211_vif
*vif
;
1509 struct ieee80211_sta
*pubsta
;
1510 struct sk_buff
*skb
;
1514 if (WARN_ON(skb_queue_empty(skbs
)))
1517 skb
= skb_peek(skbs
);
1518 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1519 info
= IEEE80211_SKB_CB(skb
);
1520 sdata
= vif_to_sdata(info
->control
.vif
);
1521 if (sta
&& !sta
->uploaded
)
1529 switch (sdata
->vif
.type
) {
1530 case NL80211_IFTYPE_MONITOR
:
1531 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
1535 sdata
= rcu_dereference(local
->monitor_sdata
);
1539 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1540 } else if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
)) {
1541 ieee80211_purge_tx_queue(&local
->hw
, skbs
);
1546 case NL80211_IFTYPE_AP_VLAN
:
1547 sdata
= container_of(sdata
->bss
,
1548 struct ieee80211_sub_if_data
, u
.ap
);
1555 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1558 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1560 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1566 * Invoke TX handlers, return 0 on success and non-zero if the
1567 * frame was dropped or queued.
1569 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1571 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1572 ieee80211_tx_result res
= TX_DROP
;
1574 #define CALL_TXH(txh) \
1577 if (res != TX_CONTINUE) \
1581 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1582 CALL_TXH(ieee80211_tx_h_check_assoc
);
1583 CALL_TXH(ieee80211_tx_h_ps_buf
);
1584 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1585 CALL_TXH(ieee80211_tx_h_select_key
);
1586 if (!ieee80211_hw_check(&tx
->local
->hw
, HAS_RATE_CONTROL
))
1587 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1589 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1590 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1595 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1596 CALL_TXH(ieee80211_tx_h_sequence
);
1597 CALL_TXH(ieee80211_tx_h_fragment
);
1598 /* handlers after fragment must be aware of tx info fragmentation! */
1599 CALL_TXH(ieee80211_tx_h_stats
);
1600 CALL_TXH(ieee80211_tx_h_encrypt
);
1601 if (!ieee80211_hw_check(&tx
->local
->hw
, HAS_RATE_CONTROL
))
1602 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1606 if (unlikely(res
== TX_DROP
)) {
1607 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1609 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1611 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1613 } else if (unlikely(res
== TX_QUEUED
)) {
1614 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1621 bool ieee80211_tx_prepare_skb(struct ieee80211_hw
*hw
,
1622 struct ieee80211_vif
*vif
, struct sk_buff
*skb
,
1623 int band
, struct ieee80211_sta
**sta
)
1625 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1626 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1627 struct ieee80211_tx_data tx
;
1628 struct sk_buff
*skb2
;
1630 if (ieee80211_tx_prepare(sdata
, &tx
, NULL
, skb
) == TX_DROP
)
1634 info
->control
.vif
= vif
;
1635 info
->hw_queue
= vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1637 if (invoke_tx_handlers(&tx
))
1642 *sta
= &tx
.sta
->sta
;
1647 /* this function isn't suitable for fragmented data frames */
1648 skb2
= __skb_dequeue(&tx
.skbs
);
1649 if (WARN_ON(skb2
!= skb
|| !skb_queue_empty(&tx
.skbs
))) {
1650 ieee80211_free_txskb(hw
, skb2
);
1651 ieee80211_purge_tx_queue(hw
, &tx
.skbs
);
1657 EXPORT_SYMBOL(ieee80211_tx_prepare_skb
);
1660 * Returns false if the frame couldn't be transmitted but was queued instead.
1662 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1663 struct sta_info
*sta
, struct sk_buff
*skb
,
1666 struct ieee80211_local
*local
= sdata
->local
;
1667 struct ieee80211_tx_data tx
;
1668 ieee80211_tx_result res_prepare
;
1669 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1673 if (unlikely(skb
->len
< 10)) {
1678 /* initialises tx */
1680 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, sta
, skb
);
1682 if (unlikely(res_prepare
== TX_DROP
)) {
1683 ieee80211_free_txskb(&local
->hw
, skb
);
1685 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1689 /* set up hw_queue value early */
1690 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1691 !ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
1693 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1695 if (!invoke_tx_handlers(&tx
))
1696 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1702 /* device xmit handlers */
1704 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1705 struct sk_buff
*skb
,
1706 int head_need
, bool may_encrypt
)
1708 struct ieee80211_local
*local
= sdata
->local
;
1711 if (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
) {
1712 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1713 tail_need
-= skb_tailroom(skb
);
1714 tail_need
= max_t(int, tail_need
, 0);
1717 if (skb_cloned(skb
) &&
1718 (!ieee80211_hw_check(&local
->hw
, SUPPORTS_CLONED_SKBS
) ||
1719 !skb_clone_writable(skb
, ETH_HLEN
) ||
1720 (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
)))
1721 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1722 else if (head_need
|| tail_need
)
1723 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1727 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1728 wiphy_debug(local
->hw
.wiphy
,
1729 "failed to reallocate TX buffer\n");
1736 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
,
1737 struct sta_info
*sta
, struct sk_buff
*skb
)
1739 struct ieee80211_local
*local
= sdata
->local
;
1740 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1741 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1745 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1747 headroom
= local
->tx_headroom
;
1749 headroom
+= sdata
->encrypt_headroom
;
1750 headroom
-= skb_headroom(skb
);
1751 headroom
= max_t(int, 0, headroom
);
1753 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1754 ieee80211_free_txskb(&local
->hw
, skb
);
1758 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1759 info
->control
.vif
= &sdata
->vif
;
1761 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1762 if (ieee80211_is_data(hdr
->frame_control
) &&
1763 is_unicast_ether_addr(hdr
->addr1
)) {
1764 if (mesh_nexthop_resolve(sdata
, skb
))
1765 return; /* skb queued: don't free */
1767 ieee80211_mps_set_frame_flags(sdata
, NULL
, hdr
);
1771 ieee80211_set_qos_hdr(sdata
, skb
);
1772 ieee80211_tx(sdata
, sta
, skb
, false);
1775 static bool ieee80211_parse_tx_radiotap(struct ieee80211_local
*local
,
1776 struct sk_buff
*skb
)
1778 struct ieee80211_radiotap_iterator iterator
;
1779 struct ieee80211_radiotap_header
*rthdr
=
1780 (struct ieee80211_radiotap_header
*) skb
->data
;
1781 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1782 struct ieee80211_supported_band
*sband
=
1783 local
->hw
.wiphy
->bands
[info
->band
];
1784 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
1788 bool rate_found
= false;
1789 u8 rate_retries
= 0;
1791 u8 mcs_known
, mcs_flags
, mcs_bw
;
1793 u8 vht_mcs
= 0, vht_nss
= 0;
1796 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1797 IEEE80211_TX_CTL_DONTFRAG
;
1800 * for every radiotap entry that is present
1801 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1802 * entries present, or -EINVAL on error)
1806 ret
= ieee80211_radiotap_iterator_next(&iterator
);
1811 /* see if this argument is something we can use */
1812 switch (iterator
.this_arg_index
) {
1814 * You must take care when dereferencing iterator.this_arg
1815 * for multibyte types... the pointer is not aligned. Use
1816 * get_unaligned((type *)iterator.this_arg) to dereference
1817 * iterator.this_arg for type "type" safely on all arches.
1819 case IEEE80211_RADIOTAP_FLAGS
:
1820 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
1822 * this indicates that the skb we have been
1823 * handed has the 32-bit FCS CRC at the end...
1824 * we should react to that by snipping it off
1825 * because it will be recomputed and added
1828 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
1831 skb_trim(skb
, skb
->len
- FCS_LEN
);
1833 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
1834 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1835 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
1836 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
1839 case IEEE80211_RADIOTAP_TX_FLAGS
:
1840 txflags
= get_unaligned_le16(iterator
.this_arg
);
1841 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
1842 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1845 case IEEE80211_RADIOTAP_RATE
:
1846 rate
= *iterator
.this_arg
;
1851 case IEEE80211_RADIOTAP_DATA_RETRIES
:
1852 rate_retries
= *iterator
.this_arg
;
1855 case IEEE80211_RADIOTAP_MCS
:
1856 mcs_known
= iterator
.this_arg
[0];
1857 mcs_flags
= iterator
.this_arg
[1];
1858 if (!(mcs_known
& IEEE80211_RADIOTAP_MCS_HAVE_MCS
))
1862 rate
= iterator
.this_arg
[2];
1863 rate_flags
= IEEE80211_TX_RC_MCS
;
1865 if (mcs_known
& IEEE80211_RADIOTAP_MCS_HAVE_GI
&&
1866 mcs_flags
& IEEE80211_RADIOTAP_MCS_SGI
)
1867 rate_flags
|= IEEE80211_TX_RC_SHORT_GI
;
1869 mcs_bw
= mcs_flags
& IEEE80211_RADIOTAP_MCS_BW_MASK
;
1870 if (mcs_known
& IEEE80211_RADIOTAP_MCS_HAVE_BW
&&
1871 mcs_bw
== IEEE80211_RADIOTAP_MCS_BW_40
)
1872 rate_flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
1875 case IEEE80211_RADIOTAP_VHT
:
1876 vht_known
= get_unaligned_le16(iterator
.this_arg
);
1879 rate_flags
= IEEE80211_TX_RC_VHT_MCS
;
1880 if ((vht_known
& IEEE80211_RADIOTAP_VHT_KNOWN_GI
) &&
1881 (iterator
.this_arg
[2] &
1882 IEEE80211_RADIOTAP_VHT_FLAG_SGI
))
1883 rate_flags
|= IEEE80211_TX_RC_SHORT_GI
;
1885 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
) {
1886 if (iterator
.this_arg
[3] == 1)
1888 IEEE80211_TX_RC_40_MHZ_WIDTH
;
1889 else if (iterator
.this_arg
[3] == 4)
1891 IEEE80211_TX_RC_80_MHZ_WIDTH
;
1892 else if (iterator
.this_arg
[3] == 11)
1894 IEEE80211_TX_RC_160_MHZ_WIDTH
;
1897 vht_mcs
= iterator
.this_arg
[4] >> 4;
1898 vht_nss
= iterator
.this_arg
[4] & 0xF;
1902 * Please update the file
1903 * Documentation/networking/mac80211-injection.txt
1904 * when parsing new fields here.
1912 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
1916 info
->control
.flags
|= IEEE80211_TX_CTRL_RATE_INJECT
;
1918 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
1919 info
->control
.rates
[i
].idx
= -1;
1920 info
->control
.rates
[i
].flags
= 0;
1921 info
->control
.rates
[i
].count
= 0;
1924 if (rate_flags
& IEEE80211_TX_RC_MCS
) {
1925 info
->control
.rates
[0].idx
= rate
;
1926 } else if (rate_flags
& IEEE80211_TX_RC_VHT_MCS
) {
1927 ieee80211_rate_set_vht(info
->control
.rates
, vht_mcs
,
1930 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1931 if (rate
* 5 != sband
->bitrates
[i
].bitrate
)
1934 info
->control
.rates
[0].idx
= i
;
1939 if (info
->control
.rates
[0].idx
< 0)
1940 info
->control
.flags
&= ~IEEE80211_TX_CTRL_RATE_INJECT
;
1942 info
->control
.rates
[0].flags
= rate_flags
;
1943 info
->control
.rates
[0].count
= min_t(u8
, rate_retries
+ 1,
1944 local
->hw
.max_rate_tries
);
1948 * remove the radiotap header
1949 * iterator->_max_length was sanity-checked against
1950 * skb->len by iterator init
1952 skb_pull(skb
, iterator
._max_length
);
1957 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
1958 struct net_device
*dev
)
1960 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1961 struct ieee80211_chanctx_conf
*chanctx_conf
;
1962 struct ieee80211_radiotap_header
*prthdr
=
1963 (struct ieee80211_radiotap_header
*)skb
->data
;
1964 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1965 struct ieee80211_hdr
*hdr
;
1966 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
1967 struct cfg80211_chan_def
*chandef
;
1971 /* check for not even having the fixed radiotap header part */
1972 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
1973 goto fail
; /* too short to be possibly valid */
1975 /* is it a header version we can trust to find length from? */
1976 if (unlikely(prthdr
->it_version
))
1977 goto fail
; /* only version 0 is supported */
1979 /* then there must be a radiotap header with a length we can use */
1980 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
1982 /* does the skb contain enough to deliver on the alleged length? */
1983 if (unlikely(skb
->len
< len_rthdr
))
1984 goto fail
; /* skb too short for claimed rt header extent */
1987 * fix up the pointers accounting for the radiotap
1988 * header still being in there. We are being given
1989 * a precooked IEEE80211 header so no need for
1992 skb_set_mac_header(skb
, len_rthdr
);
1994 * these are just fixed to the end of the rt area since we
1995 * don't have any better information and at this point, nobody cares
1997 skb_set_network_header(skb
, len_rthdr
);
1998 skb_set_transport_header(skb
, len_rthdr
);
2000 if (skb
->len
< len_rthdr
+ 2)
2003 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
2004 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
2006 if (skb
->len
< len_rthdr
+ hdrlen
)
2010 * Initialize skb->protocol if the injected frame is a data frame
2011 * carrying a rfc1042 header
2013 if (ieee80211_is_data(hdr
->frame_control
) &&
2014 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
2015 u8
*payload
= (u8
*)hdr
+ hdrlen
;
2017 if (ether_addr_equal(payload
, rfc1042_header
))
2018 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
2022 memset(info
, 0, sizeof(*info
));
2024 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2025 IEEE80211_TX_CTL_INJECTED
;
2030 * We process outgoing injected frames that have a local address
2031 * we handle as though they are non-injected frames.
2032 * This code here isn't entirely correct, the local MAC address
2033 * isn't always enough to find the interface to use; for proper
2034 * VLAN/WDS support we will need a different mechanism (which
2035 * likely isn't going to be monitor interfaces).
2037 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2039 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
2040 if (!ieee80211_sdata_running(tmp_sdata
))
2042 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
2043 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
2044 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
2046 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
2052 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2053 if (!chanctx_conf
) {
2054 tmp_sdata
= rcu_dereference(local
->monitor_sdata
);
2057 rcu_dereference(tmp_sdata
->vif
.chanctx_conf
);
2061 chandef
= &chanctx_conf
->def
;
2062 else if (!local
->use_chanctx
)
2063 chandef
= &local
->_oper_chandef
;
2068 * Frame injection is not allowed if beaconing is not allowed
2069 * or if we need radar detection. Beaconing is usually not allowed when
2070 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2071 * Passive scan is also used in world regulatory domains where
2072 * your country is not known and as such it should be treated as
2073 * NO TX unless the channel is explicitly allowed in which case
2074 * your current regulatory domain would not have the passive scan
2077 * Since AP mode uses monitor interfaces to inject/TX management
2078 * frames we can make AP mode the exception to this rule once it
2079 * supports radar detection as its implementation can deal with
2080 * radar detection by itself. We can do that later by adding a
2081 * monitor flag interfaces used for AP support.
2083 if (!cfg80211_reg_can_beacon(local
->hw
.wiphy
, chandef
,
2087 info
->band
= chandef
->chan
->band
;
2089 /* process and remove the injection radiotap header */
2090 if (!ieee80211_parse_tx_radiotap(local
, skb
))
2093 ieee80211_xmit(sdata
, NULL
, skb
);
2096 return NETDEV_TX_OK
;
2102 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
2105 static inline bool ieee80211_is_tdls_setup(struct sk_buff
*skb
)
2107 u16 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
2109 return ethertype
== ETH_P_TDLS
&&
2111 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
;
2114 static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data
*sdata
,
2115 struct sk_buff
*skb
,
2116 struct sta_info
**sta_out
)
2118 struct sta_info
*sta
;
2120 switch (sdata
->vif
.type
) {
2121 case NL80211_IFTYPE_AP_VLAN
:
2122 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
2126 } else if (sdata
->wdev
.use_4addr
) {
2130 case NL80211_IFTYPE_AP
:
2131 case NL80211_IFTYPE_OCB
:
2132 case NL80211_IFTYPE_ADHOC
:
2133 if (is_multicast_ether_addr(skb
->data
)) {
2134 *sta_out
= ERR_PTR(-ENOENT
);
2137 sta
= sta_info_get_bss(sdata
, skb
->data
);
2139 case NL80211_IFTYPE_WDS
:
2140 sta
= sta_info_get(sdata
, sdata
->u
.wds
.remote_addr
);
2142 #ifdef CONFIG_MAC80211_MESH
2143 case NL80211_IFTYPE_MESH_POINT
:
2144 /* determined much later */
2148 case NL80211_IFTYPE_STATION
:
2149 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
2150 sta
= sta_info_get(sdata
, skb
->data
);
2152 bool tdls_peer
, tdls_auth
;
2154 tdls_peer
= test_sta_flag(sta
,
2155 WLAN_STA_TDLS_PEER
);
2156 tdls_auth
= test_sta_flag(sta
,
2157 WLAN_STA_TDLS_PEER_AUTH
);
2159 if (tdls_peer
&& tdls_auth
) {
2165 * TDLS link during setup - throw out frames to
2166 * peer. Allow TDLS-setup frames to unauthorized
2167 * peers for the special case of a link teardown
2168 * after a TDLS sta is removed due to being
2171 if (tdls_peer
&& !tdls_auth
&&
2172 !ieee80211_is_tdls_setup(skb
))
2178 sta
= sta_info_get(sdata
, sdata
->u
.mgd
.bssid
);
2186 *sta_out
= sta
?: ERR_PTR(-ENOENT
);
2191 * ieee80211_build_hdr - build 802.11 header in the given frame
2192 * @sdata: virtual interface to build the header for
2193 * @skb: the skb to build the header in
2194 * @info_flags: skb flags to set
2196 * This function takes the skb with 802.3 header and reformats the header to
2197 * the appropriate IEEE 802.11 header based on which interface the packet is
2198 * being transmitted on.
2200 * Note that this function also takes care of the TX status request and
2201 * potential unsharing of the SKB - this needs to be interleaved with the
2204 * The function requires the read-side RCU lock held
2206 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2208 static struct sk_buff
*ieee80211_build_hdr(struct ieee80211_sub_if_data
*sdata
,
2209 struct sk_buff
*skb
, u32 info_flags
,
2210 struct sta_info
*sta
)
2212 struct ieee80211_local
*local
= sdata
->local
;
2213 struct ieee80211_tx_info
*info
;
2215 u16 ethertype
, hdrlen
, meshhdrlen
= 0;
2217 struct ieee80211_hdr hdr
;
2218 struct ieee80211s_hdr mesh_hdr __maybe_unused
;
2219 struct mesh_path __maybe_unused
*mppath
= NULL
, *mpath
= NULL
;
2220 const u8
*encaps_data
;
2221 int encaps_len
, skip_header_bytes
;
2223 bool wme_sta
= false, authorized
= false;
2227 struct ieee80211_chanctx_conf
*chanctx_conf
;
2228 struct ieee80211_sub_if_data
*ap_sdata
;
2229 enum nl80211_band band
;
2235 /* convert Ethernet header to proper 802.11 header (based on
2236 * operation mode) */
2237 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
2238 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
2240 switch (sdata
->vif
.type
) {
2241 case NL80211_IFTYPE_AP_VLAN
:
2242 if (sdata
->wdev
.use_4addr
) {
2243 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
2245 memcpy(hdr
.addr1
, sta
->sta
.addr
, ETH_ALEN
);
2246 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2247 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2248 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2250 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2251 wme_sta
= sta
->sta
.wme
;
2253 ap_sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
2255 chanctx_conf
= rcu_dereference(ap_sdata
->vif
.chanctx_conf
);
2256 if (!chanctx_conf
) {
2260 band
= chanctx_conf
->def
.chan
->band
;
2261 if (sdata
->wdev
.use_4addr
)
2264 case NL80211_IFTYPE_AP
:
2265 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
2266 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2267 if (!chanctx_conf
) {
2271 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
2273 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2274 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2275 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2277 band
= chanctx_conf
->def
.chan
->band
;
2279 case NL80211_IFTYPE_WDS
:
2280 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
2282 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
2283 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2284 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2285 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2288 * This is the exception! WDS style interfaces are prohibited
2289 * when channel contexts are in used so this must be valid
2291 band
= local
->hw
.conf
.chandef
.chan
->band
;
2293 #ifdef CONFIG_MAC80211_MESH
2294 case NL80211_IFTYPE_MESH_POINT
:
2295 if (!is_multicast_ether_addr(skb
->data
)) {
2296 struct sta_info
*next_hop
;
2297 bool mpp_lookup
= true;
2299 mpath
= mesh_path_lookup(sdata
, skb
->data
);
2302 next_hop
= rcu_dereference(mpath
->next_hop
);
2304 !(mpath
->flags
& (MESH_PATH_ACTIVE
|
2305 MESH_PATH_RESOLVING
)))
2310 mppath
= mpp_path_lookup(sdata
, skb
->data
);
2312 mppath
->exp_time
= jiffies
;
2315 if (mppath
&& mpath
)
2316 mesh_path_del(sdata
, mpath
->dst
);
2320 * Use address extension if it is a packet from
2321 * another interface or if we know the destination
2322 * is being proxied by a portal (i.e. portal address
2323 * differs from proxied address)
2325 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
2326 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
2327 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
2328 skb
->data
, skb
->data
+ ETH_ALEN
);
2329 meshhdrlen
= ieee80211_new_mesh_header(sdata
, &mesh_hdr
,
2332 /* DS -> MBSS (802.11-2012 13.11.3.3).
2333 * For unicast with unknown forwarding information,
2334 * destination might be in the MBSS or if that fails
2335 * forwarded to another mesh gate. In either case
2336 * resolution will be handled in ieee80211_xmit(), so
2337 * leave the original DA. This also works for mcast */
2338 const u8
*mesh_da
= skb
->data
;
2341 mesh_da
= mppath
->mpp
;
2343 mesh_da
= mpath
->dst
;
2345 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
2346 mesh_da
, sdata
->vif
.addr
);
2347 if (is_multicast_ether_addr(mesh_da
))
2348 /* DA TA mSA AE:SA */
2349 meshhdrlen
= ieee80211_new_mesh_header(
2351 skb
->data
+ ETH_ALEN
, NULL
);
2353 /* RA TA mDA mSA AE:DA SA */
2354 meshhdrlen
= ieee80211_new_mesh_header(
2355 sdata
, &mesh_hdr
, skb
->data
,
2356 skb
->data
+ ETH_ALEN
);
2359 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2360 if (!chanctx_conf
) {
2364 band
= chanctx_conf
->def
.chan
->band
;
2367 case NL80211_IFTYPE_STATION
:
2368 /* we already did checks when looking up the RA STA */
2369 tdls_peer
= test_sta_flag(sta
, WLAN_STA_TDLS_PEER
);
2373 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2374 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2375 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2377 } else if (sdata
->u
.mgd
.use_4addr
&&
2378 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
2379 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2380 IEEE80211_FCTL_TODS
);
2382 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2383 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2384 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2385 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2388 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
2390 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2391 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2392 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2395 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2396 if (!chanctx_conf
) {
2400 band
= chanctx_conf
->def
.chan
->band
;
2402 case NL80211_IFTYPE_OCB
:
2404 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2405 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2406 eth_broadcast_addr(hdr
.addr3
);
2408 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2409 if (!chanctx_conf
) {
2413 band
= chanctx_conf
->def
.chan
->band
;
2415 case NL80211_IFTYPE_ADHOC
:
2417 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2418 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2419 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
2421 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2422 if (!chanctx_conf
) {
2426 band
= chanctx_conf
->def
.chan
->band
;
2433 multicast
= is_multicast_ether_addr(hdr
.addr1
);
2435 /* sta is always NULL for mesh */
2437 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2438 wme_sta
= sta
->sta
.wme
;
2439 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2440 /* For mesh, the use of the QoS header is mandatory */
2444 /* receiver does QoS (which also means we do) use it */
2446 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2451 * Drop unicast frames to unauthorised stations unless they are
2452 * EAPOL frames from the local station.
2454 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2455 (sdata
->vif
.type
!= NL80211_IFTYPE_OCB
) &&
2456 !multicast
&& !authorized
&&
2457 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
2458 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
2459 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2460 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2461 sdata
->name
, hdr
.addr1
);
2464 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
2470 if (unlikely(!multicast
&& skb
->sk
&&
2471 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
2472 struct sk_buff
*ack_skb
= skb_clone_sk(skb
);
2475 unsigned long flags
;
2478 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
2479 id
= idr_alloc(&local
->ack_status_frames
, ack_skb
,
2480 1, 0x10000, GFP_ATOMIC
);
2481 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2485 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2493 * If the skb is shared we need to obtain our own copy.
2495 if (skb_shared(skb
)) {
2496 struct sk_buff
*tmp_skb
= skb
;
2498 /* can't happen -- skb is a clone if info_id != 0 */
2501 skb
= skb_clone(skb
, GFP_ATOMIC
);
2510 hdr
.frame_control
= fc
;
2511 hdr
.duration_id
= 0;
2514 skip_header_bytes
= ETH_HLEN
;
2515 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2516 encaps_data
= bridge_tunnel_header
;
2517 encaps_len
= sizeof(bridge_tunnel_header
);
2518 skip_header_bytes
-= 2;
2519 } else if (ethertype
>= ETH_P_802_3_MIN
) {
2520 encaps_data
= rfc1042_header
;
2521 encaps_len
= sizeof(rfc1042_header
);
2522 skip_header_bytes
-= 2;
2528 nh_pos
= skb_network_header(skb
) - skb
->data
;
2529 h_pos
= skb_transport_header(skb
) - skb
->data
;
2531 skb_pull(skb
, skip_header_bytes
);
2532 nh_pos
-= skip_header_bytes
;
2533 h_pos
-= skip_header_bytes
;
2535 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2538 * So we need to modify the skb header and hence need a copy of
2539 * that. The head_need variable above doesn't, so far, include
2540 * the needed header space that we don't need right away. If we
2541 * can, then we don't reallocate right now but only after the
2542 * frame arrives at the master device (if it does...)
2544 * If we cannot, however, then we will reallocate to include all
2545 * the ever needed space. Also, if we need to reallocate it anyway,
2546 * make it big enough for everything we may ever need.
2549 if (head_need
> 0 || skb_cloned(skb
)) {
2550 head_need
+= sdata
->encrypt_headroom
;
2551 head_need
+= local
->tx_headroom
;
2552 head_need
= max_t(int, 0, head_need
);
2553 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true)) {
2554 ieee80211_free_txskb(&local
->hw
, skb
);
2556 return ERR_PTR(-ENOMEM
);
2561 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2562 nh_pos
+= encaps_len
;
2563 h_pos
+= encaps_len
;
2566 #ifdef CONFIG_MAC80211_MESH
2567 if (meshhdrlen
> 0) {
2568 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2569 nh_pos
+= meshhdrlen
;
2570 h_pos
+= meshhdrlen
;
2574 if (ieee80211_is_data_qos(fc
)) {
2575 __le16
*qos_control
;
2577 qos_control
= (__le16
*) skb_push(skb
, 2);
2578 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2580 * Maybe we could actually set some fields here, for now just
2581 * initialise to zero to indicate no special operation.
2585 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2590 /* Update skb pointers to various headers since this modified frame
2591 * is going to go through Linux networking code that may potentially
2592 * need things like pointer to IP header. */
2593 skb_reset_mac_header(skb
);
2594 skb_set_network_header(skb
, nh_pos
);
2595 skb_set_transport_header(skb
, h_pos
);
2597 info
= IEEE80211_SKB_CB(skb
);
2598 memset(info
, 0, sizeof(*info
));
2600 info
->flags
= info_flags
;
2601 info
->ack_frame_id
= info_id
;
2607 return ERR_PTR(ret
);
2611 * fast-xmit overview
2613 * The core idea of this fast-xmit is to remove per-packet checks by checking
2614 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2615 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2616 * much less work can be done per packet. For example, fragmentation must be
2617 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2620 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2621 * header and other data to aid packet processing in ieee80211_xmit_fast().
2623 * The most difficult part of this is that when any of these assumptions
2624 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2625 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2626 * since the per-packet code no longer checks the conditions. This is reflected
2627 * by the calls to these functions throughout the rest of the code, and must be
2628 * maintained if any of the TX path checks change.
2631 void ieee80211_check_fast_xmit(struct sta_info
*sta
)
2633 struct ieee80211_fast_tx build
= {}, *fast_tx
= NULL
, *old
;
2634 struct ieee80211_local
*local
= sta
->local
;
2635 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
2636 struct ieee80211_hdr
*hdr
= (void *)build
.hdr
;
2637 struct ieee80211_chanctx_conf
*chanctx_conf
;
2640 if (!ieee80211_hw_check(&local
->hw
, SUPPORT_FAST_XMIT
))
2643 /* Locking here protects both the pointer itself, and against concurrent
2644 * invocations winning data access races to, e.g., the key pointer that
2646 * Without it, the invocation of this function right after the key
2647 * pointer changes wouldn't be sufficient, as another CPU could access
2648 * the pointer, then stall, and then do the cache update after the CPU
2649 * that invalidated the key.
2650 * With the locking, such scenarios cannot happen as the check for the
2651 * key and the fast-tx assignment are done atomically, so the CPU that
2652 * modifies the key will either wait or other one will see the key
2653 * cleared/changed already.
2655 spin_lock_bh(&sta
->lock
);
2656 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
) &&
2657 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
) &&
2658 sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2661 if (!test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
2664 if (test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
2665 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
2666 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
) ||
2667 test_sta_flag(sta
, WLAN_STA_CLEAR_PS_FILT
))
2670 if (sdata
->noack_map
)
2673 /* fast-xmit doesn't handle fragmentation at all */
2674 if (local
->hw
.wiphy
->frag_threshold
!= (u32
)-1 &&
2675 !local
->ops
->set_frag_threshold
)
2679 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2680 if (!chanctx_conf
) {
2684 build
.band
= chanctx_conf
->def
.chan
->band
;
2687 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
2689 switch (sdata
->vif
.type
) {
2690 case NL80211_IFTYPE_ADHOC
:
2692 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
2693 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
2694 memcpy(hdr
->addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
2697 case NL80211_IFTYPE_STATION
:
2698 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER
)) {
2700 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
2701 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
2702 memcpy(hdr
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2707 if (sdata
->u
.mgd
.use_4addr
) {
2708 /* non-regular ethertype cannot use the fastpath */
2709 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2710 IEEE80211_FCTL_TODS
);
2712 memcpy(hdr
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2713 memcpy(hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2714 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2715 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
2719 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
2721 memcpy(hdr
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2722 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2723 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
2726 case NL80211_IFTYPE_AP_VLAN
:
2727 if (sdata
->wdev
.use_4addr
) {
2728 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2729 IEEE80211_FCTL_TODS
);
2731 memcpy(hdr
->addr1
, sta
->sta
.addr
, ETH_ALEN
);
2732 memcpy(hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2733 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2734 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
2739 case NL80211_IFTYPE_AP
:
2740 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
2742 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
2743 memcpy(hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2744 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2748 /* not handled on fast-xmit */
2754 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2757 /* We store the key here so there's no point in using rcu_dereference()
2758 * but that's fine because the code that changes the pointers will call
2759 * this function after doing so. For a single CPU that would be enough,
2760 * for multiple see the comment above.
2762 build
.key
= rcu_access_pointer(sta
->ptk
[sta
->ptk_idx
]);
2764 build
.key
= rcu_access_pointer(sdata
->default_unicast_key
);
2766 bool gen_iv
, iv_spc
, mmic
;
2768 gen_iv
= build
.key
->conf
.flags
& IEEE80211_KEY_FLAG_GENERATE_IV
;
2769 iv_spc
= build
.key
->conf
.flags
& IEEE80211_KEY_FLAG_PUT_IV_SPACE
;
2770 mmic
= build
.key
->conf
.flags
& IEEE80211_KEY_FLAG_GENERATE_MMIC
;
2772 /* don't handle software crypto */
2773 if (!(build
.key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
2776 switch (build
.key
->conf
.cipher
) {
2777 case WLAN_CIPHER_SUITE_CCMP
:
2778 case WLAN_CIPHER_SUITE_CCMP_256
:
2779 /* add fixed key ID */
2781 (build
.hdr
+ build
.hdr_len
)[3] =
2782 0x20 | (build
.key
->conf
.keyidx
<< 6);
2783 build
.pn_offs
= build
.hdr_len
;
2785 if (gen_iv
|| iv_spc
)
2786 build
.hdr_len
+= IEEE80211_CCMP_HDR_LEN
;
2788 case WLAN_CIPHER_SUITE_GCMP
:
2789 case WLAN_CIPHER_SUITE_GCMP_256
:
2790 /* add fixed key ID */
2792 (build
.hdr
+ build
.hdr_len
)[3] =
2793 0x20 | (build
.key
->conf
.keyidx
<< 6);
2794 build
.pn_offs
= build
.hdr_len
;
2796 if (gen_iv
|| iv_spc
)
2797 build
.hdr_len
+= IEEE80211_GCMP_HDR_LEN
;
2799 case WLAN_CIPHER_SUITE_TKIP
:
2800 /* cannot handle MMIC or IV generation in xmit-fast */
2804 build
.hdr_len
+= IEEE80211_TKIP_IV_LEN
;
2806 case WLAN_CIPHER_SUITE_WEP40
:
2807 case WLAN_CIPHER_SUITE_WEP104
:
2808 /* cannot handle IV generation in fast-xmit */
2812 build
.hdr_len
+= IEEE80211_WEP_IV_LEN
;
2814 case WLAN_CIPHER_SUITE_AES_CMAC
:
2815 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
2816 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
2817 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
2819 "management cipher suite 0x%x enabled for data\n",
2820 build
.key
->conf
.cipher
);
2823 /* we don't know how to generate IVs for this at all */
2824 if (WARN_ON(gen_iv
))
2826 /* pure hardware keys are OK, of course */
2827 if (!(build
.key
->flags
& KEY_FLAG_CIPHER_SCHEME
))
2829 /* cipher scheme might require space allocation */
2831 build
.key
->conf
.iv_len
> IEEE80211_FAST_XMIT_MAX_IV
)
2834 build
.hdr_len
+= build
.key
->conf
.iv_len
;
2837 fc
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
2840 hdr
->frame_control
= fc
;
2842 memcpy(build
.hdr
+ build
.hdr_len
,
2843 rfc1042_header
, sizeof(rfc1042_header
));
2844 build
.hdr_len
+= sizeof(rfc1042_header
);
2846 fast_tx
= kmemdup(&build
, sizeof(build
), GFP_ATOMIC
);
2847 /* if the kmemdup fails, continue w/o fast_tx */
2852 /* we might have raced against another call to this function */
2853 old
= rcu_dereference_protected(sta
->fast_tx
,
2854 lockdep_is_held(&sta
->lock
));
2855 rcu_assign_pointer(sta
->fast_tx
, fast_tx
);
2857 kfree_rcu(old
, rcu_head
);
2858 spin_unlock_bh(&sta
->lock
);
2861 void ieee80211_check_fast_xmit_all(struct ieee80211_local
*local
)
2863 struct sta_info
*sta
;
2866 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
)
2867 ieee80211_check_fast_xmit(sta
);
2871 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data
*sdata
)
2873 struct ieee80211_local
*local
= sdata
->local
;
2874 struct sta_info
*sta
;
2878 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
2879 if (sdata
!= sta
->sdata
&&
2880 (!sta
->sdata
->bss
|| sta
->sdata
->bss
!= sdata
->bss
))
2882 ieee80211_check_fast_xmit(sta
);
2888 void ieee80211_clear_fast_xmit(struct sta_info
*sta
)
2890 struct ieee80211_fast_tx
*fast_tx
;
2892 spin_lock_bh(&sta
->lock
);
2893 fast_tx
= rcu_dereference_protected(sta
->fast_tx
,
2894 lockdep_is_held(&sta
->lock
));
2895 RCU_INIT_POINTER(sta
->fast_tx
, NULL
);
2896 spin_unlock_bh(&sta
->lock
);
2899 kfree_rcu(fast_tx
, rcu_head
);
2902 static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local
*local
,
2903 struct sk_buff
*skb
, int headroom
,
2906 int amsdu_len
= *subframe_len
+ sizeof(struct ethhdr
);
2907 int padding
= (4 - amsdu_len
) & 3;
2909 if (skb_headroom(skb
) < headroom
|| skb_tailroom(skb
) < padding
) {
2910 I802_DEBUG_INC(local
->tx_expand_skb_head
);
2912 if (pskb_expand_head(skb
, headroom
, padding
, GFP_ATOMIC
)) {
2913 wiphy_debug(local
->hw
.wiphy
,
2914 "failed to reallocate TX buffer\n");
2920 *subframe_len
+= padding
;
2921 memset(skb_put(skb
, padding
), 0, padding
);
2927 static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data
*sdata
,
2928 struct ieee80211_fast_tx
*fast_tx
,
2929 struct sk_buff
*skb
)
2931 struct ieee80211_local
*local
= sdata
->local
;
2932 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2933 struct ieee80211_hdr
*hdr
;
2934 struct ethhdr amsdu_hdr
;
2935 int hdr_len
= fast_tx
->hdr_len
- sizeof(rfc1042_header
);
2936 int subframe_len
= skb
->len
- hdr_len
;
2940 if (info
->flags
& IEEE80211_TX_CTL_RATE_CTRL_PROBE
)
2943 if (info
->control
.flags
& IEEE80211_TX_CTRL_AMSDU
)
2946 if (!ieee80211_amsdu_realloc_pad(local
, skb
, sizeof(amsdu_hdr
),
2950 amsdu_hdr
.h_proto
= cpu_to_be16(subframe_len
);
2951 memcpy(amsdu_hdr
.h_source
, skb
->data
+ fast_tx
->sa_offs
, ETH_ALEN
);
2952 memcpy(amsdu_hdr
.h_dest
, skb
->data
+ fast_tx
->da_offs
, ETH_ALEN
);
2954 data
= skb_push(skb
, sizeof(amsdu_hdr
));
2955 memmove(data
, data
+ sizeof(amsdu_hdr
), hdr_len
);
2956 memcpy(data
+ hdr_len
, &amsdu_hdr
, sizeof(amsdu_hdr
));
2959 qc
= ieee80211_get_qos_ctl(hdr
);
2960 *qc
|= IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
2962 info
->control
.flags
|= IEEE80211_TX_CTRL_AMSDU
;
2967 static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data
*sdata
,
2968 struct sta_info
*sta
,
2969 struct ieee80211_fast_tx
*fast_tx
,
2970 struct sk_buff
*skb
)
2972 struct ieee80211_local
*local
= sdata
->local
;
2973 struct fq
*fq
= &local
->fq
;
2975 struct fq_flow
*flow
;
2976 u8 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
2977 struct ieee80211_txq
*txq
= sta
->sta
.txq
[tid
];
2978 struct txq_info
*txqi
;
2979 struct sk_buff
**frag_tail
, *head
;
2980 int subframe_len
= skb
->len
- ETH_ALEN
;
2981 u8 max_subframes
= sta
->sta
.max_amsdu_subframes
;
2982 int max_frags
= local
->hw
.max_tx_fragments
;
2983 int max_amsdu_len
= sta
->sta
.max_amsdu_len
;
2987 unsigned int orig_len
;
2990 if (!ieee80211_hw_check(&local
->hw
, TX_AMSDU
))
2996 txqi
= to_txq_info(txq
);
2997 if (test_bit(IEEE80211_TXQ_NO_AMSDU
, &txqi
->flags
))
3000 if (sta
->sta
.max_rc_amsdu_len
)
3001 max_amsdu_len
= min_t(int, max_amsdu_len
,
3002 sta
->sta
.max_rc_amsdu_len
);
3004 spin_lock_bh(&fq
->lock
);
3006 /* TODO: Ideally aggregation should be done on dequeue to remain
3007 * responsive to environment changes.
3011 flow
= fq_flow_classify(fq
, tin
, skb
, fq_flow_get_default_func
);
3012 head
= skb_peek_tail(&flow
->queue
);
3016 orig_len
= head
->len
;
3018 if (skb
->len
+ head
->len
> max_amsdu_len
)
3021 if (!ieee80211_amsdu_prepare_head(sdata
, fast_tx
, head
))
3024 nfrags
= 1 + skb_shinfo(skb
)->nr_frags
;
3025 nfrags
+= 1 + skb_shinfo(head
)->nr_frags
;
3026 frag_tail
= &skb_shinfo(head
)->frag_list
;
3027 while (*frag_tail
) {
3028 nfrags
+= 1 + skb_shinfo(*frag_tail
)->nr_frags
;
3029 frag_tail
= &(*frag_tail
)->next
;
3033 if (max_subframes
&& n
> max_subframes
)
3036 if (max_frags
&& nfrags
> max_frags
)
3039 if (!ieee80211_amsdu_realloc_pad(local
, skb
, sizeof(rfc1042_header
) + 2,
3044 data
= skb_push(skb
, ETH_ALEN
+ 2);
3045 memmove(data
, data
+ ETH_ALEN
+ 2, 2 * ETH_ALEN
);
3047 data
+= 2 * ETH_ALEN
;
3048 len
= cpu_to_be16(subframe_len
);
3049 memcpy(data
, &len
, 2);
3050 memcpy(data
+ 2, rfc1042_header
, sizeof(rfc1042_header
));
3052 head
->len
+= skb
->len
;
3053 head
->data_len
+= skb
->len
;
3056 flow
->backlog
+= head
->len
- orig_len
;
3057 tin
->backlog_bytes
+= head
->len
- orig_len
;
3059 fq_recalc_backlog(fq
, tin
, flow
);
3062 spin_unlock_bh(&fq
->lock
);
3067 static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data
*sdata
,
3068 struct net_device
*dev
, struct sta_info
*sta
,
3069 struct ieee80211_fast_tx
*fast_tx
,
3070 struct sk_buff
*skb
)
3072 struct ieee80211_local
*local
= sdata
->local
;
3073 u16 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
3074 int extra_head
= fast_tx
->hdr_len
- (ETH_HLEN
- 2);
3075 int hw_headroom
= sdata
->local
->hw
.extra_tx_headroom
;
3077 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3078 struct ieee80211_hdr
*hdr
= (void *)fast_tx
->hdr
;
3079 struct ieee80211_tx_data tx
;
3080 ieee80211_tx_result r
;
3081 struct tid_ampdu_tx
*tid_tx
= NULL
;
3082 u8 tid
= IEEE80211_NUM_TIDS
;
3084 /* control port protocol needs a lot of special handling */
3085 if (cpu_to_be16(ethertype
) == sdata
->control_port_protocol
)
3088 /* only RFC 1042 SNAP */
3089 if (ethertype
< ETH_P_802_3_MIN
)
3092 /* don't handle TX status request here either */
3093 if (skb
->sk
&& skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)
3096 if (hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) {
3097 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
3098 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[tid
]);
3100 if (!test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
))
3102 if (tid_tx
->timeout
)
3103 tid_tx
->last_tx
= jiffies
;
3107 /* after this point (skb is modified) we cannot return false */
3109 if (skb_shared(skb
)) {
3110 struct sk_buff
*tmp_skb
= skb
;
3112 skb
= skb_clone(skb
, GFP_ATOMIC
);
3119 ieee80211_tx_stats(dev
, skb
->len
+ extra_head
);
3121 if ((hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) &&
3122 ieee80211_amsdu_aggregate(sdata
, sta
, fast_tx
, skb
))
3125 /* will not be crypto-handled beyond what we do here, so use false
3126 * as the may-encrypt argument for the resize to not account for
3127 * more room than we already have in 'extra_head'
3129 if (unlikely(ieee80211_skb_resize(sdata
, skb
,
3130 max_t(int, extra_head
+ hw_headroom
-
3131 skb_headroom(skb
), 0),
3137 memcpy(ð
, skb
->data
, ETH_HLEN
- 2);
3138 hdr
= (void *)skb_push(skb
, extra_head
);
3139 memcpy(skb
->data
, fast_tx
->hdr
, fast_tx
->hdr_len
);
3140 memcpy(skb
->data
+ fast_tx
->da_offs
, eth
.h_dest
, ETH_ALEN
);
3141 memcpy(skb
->data
+ fast_tx
->sa_offs
, eth
.h_source
, ETH_ALEN
);
3143 memset(info
, 0, sizeof(*info
));
3144 info
->band
= fast_tx
->band
;
3145 info
->control
.vif
= &sdata
->vif
;
3146 info
->flags
= IEEE80211_TX_CTL_FIRST_FRAGMENT
|
3147 IEEE80211_TX_CTL_DONTFRAG
|
3148 (tid_tx
? IEEE80211_TX_CTL_AMPDU
: 0);
3150 if (hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) {
3151 *ieee80211_get_qos_ctl(hdr
) = tid
;
3152 if (!sta
->sta
.txq
[0])
3153 hdr
->seq_ctrl
= ieee80211_tx_next_seq(sta
, tid
);
3155 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
3156 hdr
->seq_ctrl
= cpu_to_le16(sdata
->sequence_number
);
3157 sdata
->sequence_number
+= 0x10;
3160 if (skb_shinfo(skb
)->gso_size
)
3161 sta
->tx_stats
.msdu
[tid
] +=
3162 DIV_ROUND_UP(skb
->len
, skb_shinfo(skb
)->gso_size
);
3164 sta
->tx_stats
.msdu
[tid
]++;
3166 info
->hw_queue
= sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
3168 __skb_queue_head_init(&tx
.skbs
);
3170 tx
.flags
= IEEE80211_TX_UNICAST
;
3174 tx
.key
= fast_tx
->key
;
3177 info
->control
.hw_key
= &fast_tx
->key
->conf
;
3179 if (!ieee80211_hw_check(&local
->hw
, HAS_RATE_CONTROL
)) {
3181 r
= ieee80211_tx_h_rate_ctrl(&tx
);
3185 if (r
!= TX_CONTINUE
) {
3192 /* statistics normally done by ieee80211_tx_h_stats (but that
3193 * has to consider fragmentation, so is more complex)
3195 sta
->tx_stats
.bytes
[skb_get_queue_mapping(skb
)] += skb
->len
;
3196 sta
->tx_stats
.packets
[skb_get_queue_mapping(skb
)]++;
3198 if (fast_tx
->pn_offs
) {
3200 u8
*crypto_hdr
= skb
->data
+ fast_tx
->pn_offs
;
3202 switch (fast_tx
->key
->conf
.cipher
) {
3203 case WLAN_CIPHER_SUITE_CCMP
:
3204 case WLAN_CIPHER_SUITE_CCMP_256
:
3205 case WLAN_CIPHER_SUITE_GCMP
:
3206 case WLAN_CIPHER_SUITE_GCMP_256
:
3207 pn
= atomic64_inc_return(&fast_tx
->key
->conf
.tx_pn
);
3209 crypto_hdr
[1] = pn
>> 8;
3210 crypto_hdr
[4] = pn
>> 16;
3211 crypto_hdr
[5] = pn
>> 24;
3212 crypto_hdr
[6] = pn
>> 32;
3213 crypto_hdr
[7] = pn
>> 40;
3218 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
3219 sdata
= container_of(sdata
->bss
,
3220 struct ieee80211_sub_if_data
, u
.ap
);
3222 __skb_queue_tail(&tx
.skbs
, skb
);
3223 ieee80211_tx_frags(local
, &sdata
->vif
, &sta
->sta
, &tx
.skbs
, false);
3227 void __ieee80211_subif_start_xmit(struct sk_buff
*skb
,
3228 struct net_device
*dev
,
3231 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3232 struct sta_info
*sta
;
3233 struct sk_buff
*next
;
3235 if (unlikely(skb
->len
< ETH_HLEN
)) {
3242 if (ieee80211_lookup_ra_sta(sdata
, skb
, &sta
))
3245 if (!IS_ERR_OR_NULL(sta
)) {
3246 struct ieee80211_fast_tx
*fast_tx
;
3248 fast_tx
= rcu_dereference(sta
->fast_tx
);
3251 ieee80211_xmit_fast(sdata
, dev
, sta
, fast_tx
, skb
))
3255 if (skb_is_gso(skb
)) {
3256 struct sk_buff
*segs
;
3258 segs
= skb_gso_segment(skb
, 0);
3266 /* we cannot process non-linear frames on this path */
3267 if (skb_linearize(skb
)) {
3272 /* the frame could be fragmented, software-encrypted, and other
3273 * things so we cannot really handle checksum offload with it -
3274 * fix it up in software before we handle anything else.
3276 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
3277 skb_set_transport_header(skb
,
3278 skb_checksum_start_offset(skb
));
3279 if (skb_checksum_help(skb
))
3292 skb
= ieee80211_build_hdr(sdata
, skb
, info_flags
, sta
);
3296 ieee80211_tx_stats(dev
, skb
->len
);
3298 ieee80211_xmit(sdata
, sta
, skb
);
3308 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3309 * @skb: packet to be sent
3310 * @dev: incoming interface
3312 * On failure skb will be freed.
3314 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
3315 struct net_device
*dev
)
3317 __ieee80211_subif_start_xmit(skb
, dev
, 0);
3318 return NETDEV_TX_OK
;
3322 ieee80211_build_data_template(struct ieee80211_sub_if_data
*sdata
,
3323 struct sk_buff
*skb
, u32 info_flags
)
3325 struct ieee80211_hdr
*hdr
;
3326 struct ieee80211_tx_data tx
= {
3327 .local
= sdata
->local
,
3330 struct sta_info
*sta
;
3334 if (ieee80211_lookup_ra_sta(sdata
, skb
, &sta
)) {
3336 skb
= ERR_PTR(-EINVAL
);
3340 skb
= ieee80211_build_hdr(sdata
, skb
, info_flags
, sta
);
3344 hdr
= (void *)skb
->data
;
3345 tx
.sta
= sta_info_get(sdata
, hdr
->addr1
);
3348 if (ieee80211_tx_h_select_key(&tx
) != TX_CONTINUE
) {
3351 return ERR_PTR(-EINVAL
);
3360 * ieee80211_clear_tx_pending may not be called in a context where
3361 * it is possible that it packets could come in again.
3363 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
3365 struct sk_buff
*skb
;
3368 for (i
= 0; i
< local
->hw
.queues
; i
++) {
3369 while ((skb
= skb_dequeue(&local
->pending
[i
])) != NULL
)
3370 ieee80211_free_txskb(&local
->hw
, skb
);
3375 * Returns false if the frame couldn't be transmitted but was queued instead,
3376 * which in this case means re-queued -- take as an indication to stop sending
3377 * more pending frames.
3379 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
3380 struct sk_buff
*skb
)
3382 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3383 struct ieee80211_sub_if_data
*sdata
;
3384 struct sta_info
*sta
;
3385 struct ieee80211_hdr
*hdr
;
3387 struct ieee80211_chanctx_conf
*chanctx_conf
;
3389 sdata
= vif_to_sdata(info
->control
.vif
);
3391 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
3392 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3393 if (unlikely(!chanctx_conf
)) {
3397 info
->band
= chanctx_conf
->def
.chan
->band
;
3398 result
= ieee80211_tx(sdata
, NULL
, skb
, true);
3400 struct sk_buff_head skbs
;
3402 __skb_queue_head_init(&skbs
);
3403 __skb_queue_tail(&skbs
, skb
);
3405 hdr
= (struct ieee80211_hdr
*)skb
->data
;
3406 sta
= sta_info_get(sdata
, hdr
->addr1
);
3408 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
3415 * Transmit all pending packets. Called from tasklet.
3417 void ieee80211_tx_pending(unsigned long data
)
3419 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
3420 unsigned long flags
;
3426 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
3427 for (i
= 0; i
< local
->hw
.queues
; i
++) {
3429 * If queue is stopped by something other than due to pending
3430 * frames, or we have no pending frames, proceed to next queue.
3432 if (local
->queue_stop_reasons
[i
] ||
3433 skb_queue_empty(&local
->pending
[i
]))
3436 while (!skb_queue_empty(&local
->pending
[i
])) {
3437 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
3438 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3440 if (WARN_ON(!info
->control
.vif
)) {
3441 ieee80211_free_txskb(&local
->hw
, skb
);
3445 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
3448 txok
= ieee80211_tx_pending_skb(local
, skb
);
3449 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
3455 if (skb_queue_empty(&local
->pending
[i
]))
3456 ieee80211_propagate_queue_wake(local
, i
);
3458 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
3463 /* functions for drivers to get certain frames */
3465 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
3466 struct ps_data
*ps
, struct sk_buff
*skb
,
3471 int i
, have_bits
= 0, n1
, n2
;
3473 /* Generate bitmap for TIM only if there are any STAs in power save
3475 if (atomic_read(&ps
->num_sta_ps
) > 0)
3476 /* in the hope that this is faster than
3477 * checking byte-for-byte */
3478 have_bits
= !bitmap_empty((unsigned long *)ps
->tim
,
3479 IEEE80211_MAX_AID
+1);
3481 if (ps
->dtim_count
== 0)
3482 ps
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
3487 tim
= pos
= (u8
*) skb_put(skb
, 6);
3488 *pos
++ = WLAN_EID_TIM
;
3490 *pos
++ = ps
->dtim_count
;
3491 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
3493 if (ps
->dtim_count
== 0 && !skb_queue_empty(&ps
->bc_buf
))
3496 ps
->dtim_bc_mc
= aid0
== 1;
3499 /* Find largest even number N1 so that bits numbered 1 through
3500 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3501 * (N2 + 1) x 8 through 2007 are 0. */
3503 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
3510 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
3517 /* Bitmap control */
3519 /* Part Virt Bitmap */
3520 skb_put(skb
, n2
- n1
);
3521 memcpy(pos
, ps
->tim
+ n1
, n2
- n1
+ 1);
3523 tim
[1] = n2
- n1
+ 4;
3525 *pos
++ = aid0
; /* Bitmap control */
3526 *pos
++ = 0; /* Part Virt Bitmap */
3530 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
3531 struct ps_data
*ps
, struct sk_buff
*skb
,
3534 struct ieee80211_local
*local
= sdata
->local
;
3537 * Not very nice, but we want to allow the driver to call
3538 * ieee80211_beacon_get() as a response to the set_tim()
3539 * callback. That, however, is already invoked under the
3540 * sta_lock to guarantee consistent and race-free update
3541 * of the tim bitmap in mac80211 and the driver.
3543 if (local
->tim_in_locked_section
) {
3544 __ieee80211_beacon_add_tim(sdata
, ps
, skb
, is_template
);
3546 spin_lock_bh(&local
->tim_lock
);
3547 __ieee80211_beacon_add_tim(sdata
, ps
, skb
, is_template
);
3548 spin_unlock_bh(&local
->tim_lock
);
3554 static void ieee80211_set_csa(struct ieee80211_sub_if_data
*sdata
,
3555 struct beacon_data
*beacon
)
3557 struct probe_resp
*resp
;
3559 size_t beacon_data_len
;
3561 u8 count
= beacon
->csa_current_counter
;
3563 switch (sdata
->vif
.type
) {
3564 case NL80211_IFTYPE_AP
:
3565 beacon_data
= beacon
->tail
;
3566 beacon_data_len
= beacon
->tail_len
;
3568 case NL80211_IFTYPE_ADHOC
:
3569 beacon_data
= beacon
->head
;
3570 beacon_data_len
= beacon
->head_len
;
3572 case NL80211_IFTYPE_MESH_POINT
:
3573 beacon_data
= beacon
->head
;
3574 beacon_data_len
= beacon
->head_len
;
3581 for (i
= 0; i
< IEEE80211_MAX_CSA_COUNTERS_NUM
; ++i
) {
3582 resp
= rcu_dereference(sdata
->u
.ap
.probe_resp
);
3584 if (beacon
->csa_counter_offsets
[i
]) {
3585 if (WARN_ON_ONCE(beacon
->csa_counter_offsets
[i
] >=
3591 beacon_data
[beacon
->csa_counter_offsets
[i
]] = count
;
3594 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
&& resp
)
3595 resp
->data
[resp
->csa_counter_offsets
[i
]] = count
;
3600 static u8
__ieee80211_csa_update_counter(struct beacon_data
*beacon
)
3602 beacon
->csa_current_counter
--;
3604 /* the counter should never reach 0 */
3605 WARN_ON_ONCE(!beacon
->csa_current_counter
);
3607 return beacon
->csa_current_counter
;
3610 u8
ieee80211_csa_update_counter(struct ieee80211_vif
*vif
)
3612 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3613 struct beacon_data
*beacon
= NULL
;
3618 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
3619 beacon
= rcu_dereference(sdata
->u
.ap
.beacon
);
3620 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
3621 beacon
= rcu_dereference(sdata
->u
.ibss
.presp
);
3622 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
3623 beacon
= rcu_dereference(sdata
->u
.mesh
.beacon
);
3628 count
= __ieee80211_csa_update_counter(beacon
);
3634 EXPORT_SYMBOL(ieee80211_csa_update_counter
);
3636 bool ieee80211_csa_is_complete(struct ieee80211_vif
*vif
)
3638 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3639 struct beacon_data
*beacon
= NULL
;
3641 size_t beacon_data_len
;
3644 if (!ieee80211_sdata_running(sdata
))
3648 if (vif
->type
== NL80211_IFTYPE_AP
) {
3649 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
3651 beacon
= rcu_dereference(ap
->beacon
);
3652 if (WARN_ON(!beacon
|| !beacon
->tail
))
3654 beacon_data
= beacon
->tail
;
3655 beacon_data_len
= beacon
->tail_len
;
3656 } else if (vif
->type
== NL80211_IFTYPE_ADHOC
) {
3657 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
3659 beacon
= rcu_dereference(ifibss
->presp
);
3663 beacon_data
= beacon
->head
;
3664 beacon_data_len
= beacon
->head_len
;
3665 } else if (vif
->type
== NL80211_IFTYPE_MESH_POINT
) {
3666 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
3668 beacon
= rcu_dereference(ifmsh
->beacon
);
3672 beacon_data
= beacon
->head
;
3673 beacon_data_len
= beacon
->head_len
;
3679 if (!beacon
->csa_counter_offsets
[0])
3682 if (WARN_ON_ONCE(beacon
->csa_counter_offsets
[0] > beacon_data_len
))
3685 if (beacon_data
[beacon
->csa_counter_offsets
[0]] == 1)
3692 EXPORT_SYMBOL(ieee80211_csa_is_complete
);
3694 static struct sk_buff
*
3695 __ieee80211_beacon_get(struct ieee80211_hw
*hw
,
3696 struct ieee80211_vif
*vif
,
3697 struct ieee80211_mutable_offsets
*offs
,
3700 struct ieee80211_local
*local
= hw_to_local(hw
);
3701 struct beacon_data
*beacon
= NULL
;
3702 struct sk_buff
*skb
= NULL
;
3703 struct ieee80211_tx_info
*info
;
3704 struct ieee80211_sub_if_data
*sdata
= NULL
;
3705 enum nl80211_band band
;
3706 struct ieee80211_tx_rate_control txrc
;
3707 struct ieee80211_chanctx_conf
*chanctx_conf
;
3708 int csa_off_base
= 0;
3712 sdata
= vif_to_sdata(vif
);
3713 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3715 if (!ieee80211_sdata_running(sdata
) || !chanctx_conf
)
3719 memset(offs
, 0, sizeof(*offs
));
3721 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
3722 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
3724 beacon
= rcu_dereference(ap
->beacon
);
3726 if (beacon
->csa_counter_offsets
[0]) {
3728 __ieee80211_csa_update_counter(beacon
);
3730 ieee80211_set_csa(sdata
, beacon
);
3734 * headroom, head length,
3735 * tail length and maximum TIM length
3737 skb
= dev_alloc_skb(local
->tx_headroom
+
3739 beacon
->tail_len
+ 256 +
3740 local
->hw
.extra_beacon_tailroom
);
3744 skb_reserve(skb
, local
->tx_headroom
);
3745 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
3748 ieee80211_beacon_add_tim(sdata
, &ap
->ps
, skb
,
3752 offs
->tim_offset
= beacon
->head_len
;
3753 offs
->tim_length
= skb
->len
- beacon
->head_len
;
3755 /* for AP the csa offsets are from tail */
3756 csa_off_base
= skb
->len
;
3760 memcpy(skb_put(skb
, beacon
->tail_len
),
3761 beacon
->tail
, beacon
->tail_len
);
3764 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
3765 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
3766 struct ieee80211_hdr
*hdr
;
3768 beacon
= rcu_dereference(ifibss
->presp
);
3772 if (beacon
->csa_counter_offsets
[0]) {
3774 __ieee80211_csa_update_counter(beacon
);
3776 ieee80211_set_csa(sdata
, beacon
);
3779 skb
= dev_alloc_skb(local
->tx_headroom
+ beacon
->head_len
+
3780 local
->hw
.extra_beacon_tailroom
);
3783 skb_reserve(skb
, local
->tx_headroom
);
3784 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
3787 hdr
= (struct ieee80211_hdr
*) skb
->data
;
3788 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
3789 IEEE80211_STYPE_BEACON
);
3790 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
3791 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
3793 beacon
= rcu_dereference(ifmsh
->beacon
);
3797 if (beacon
->csa_counter_offsets
[0]) {
3799 /* TODO: For mesh csa_counter is in TU, so
3800 * decrementing it by one isn't correct, but
3801 * for now we leave it consistent with overall
3802 * mac80211's behavior.
3804 __ieee80211_csa_update_counter(beacon
);
3806 ieee80211_set_csa(sdata
, beacon
);
3809 if (ifmsh
->sync_ops
)
3810 ifmsh
->sync_ops
->adjust_tbtt(sdata
, beacon
);
3812 skb
= dev_alloc_skb(local
->tx_headroom
+
3816 local
->hw
.extra_beacon_tailroom
);
3819 skb_reserve(skb
, local
->tx_headroom
);
3820 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
3822 ieee80211_beacon_add_tim(sdata
, &ifmsh
->ps
, skb
, is_template
);
3825 offs
->tim_offset
= beacon
->head_len
;
3826 offs
->tim_length
= skb
->len
- beacon
->head_len
;
3829 memcpy(skb_put(skb
, beacon
->tail_len
), beacon
->tail
,
3837 if (offs
&& beacon
) {
3840 for (i
= 0; i
< IEEE80211_MAX_CSA_COUNTERS_NUM
; i
++) {
3841 u16 csa_off
= beacon
->csa_counter_offsets
[i
];
3846 offs
->csa_counter_offs
[i
] = csa_off_base
+ csa_off
;
3850 band
= chanctx_conf
->def
.chan
->band
;
3852 info
= IEEE80211_SKB_CB(skb
);
3854 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
3855 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
3858 memset(&txrc
, 0, sizeof(txrc
));
3860 txrc
.sband
= local
->hw
.wiphy
->bands
[band
];
3861 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
3863 txrc
.reported_rate
.idx
= -1;
3864 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
3865 if (txrc
.rate_idx_mask
== (1 << txrc
.sband
->n_bitrates
) - 1)
3866 txrc
.max_rate_idx
= -1;
3868 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
3870 rate_control_get_rate(sdata
, NULL
, &txrc
);
3872 info
->control
.vif
= vif
;
3874 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
3875 IEEE80211_TX_CTL_ASSIGN_SEQ
|
3876 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
3884 ieee80211_beacon_get_template(struct ieee80211_hw
*hw
,
3885 struct ieee80211_vif
*vif
,
3886 struct ieee80211_mutable_offsets
*offs
)
3888 return __ieee80211_beacon_get(hw
, vif
, offs
, true);
3890 EXPORT_SYMBOL(ieee80211_beacon_get_template
);
3892 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
3893 struct ieee80211_vif
*vif
,
3894 u16
*tim_offset
, u16
*tim_length
)
3896 struct ieee80211_mutable_offsets offs
= {};
3897 struct sk_buff
*bcn
= __ieee80211_beacon_get(hw
, vif
, &offs
, false);
3898 struct sk_buff
*copy
;
3899 struct ieee80211_supported_band
*sband
;
3906 *tim_offset
= offs
.tim_offset
;
3909 *tim_length
= offs
.tim_length
;
3911 if (ieee80211_hw_check(hw
, BEACON_TX_STATUS
) ||
3912 !hw_to_local(hw
)->monitors
)
3915 /* send a copy to monitor interfaces */
3916 copy
= skb_copy(bcn
, GFP_ATOMIC
);
3920 shift
= ieee80211_vif_get_shift(vif
);
3921 sband
= hw
->wiphy
->bands
[ieee80211_get_sdata_band(vif_to_sdata(vif
))];
3922 ieee80211_tx_monitor(hw_to_local(hw
), copy
, sband
, 1, shift
, false);
3926 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
3928 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
3929 struct ieee80211_vif
*vif
)
3931 struct ieee80211_if_ap
*ap
= NULL
;
3932 struct sk_buff
*skb
= NULL
;
3933 struct probe_resp
*presp
= NULL
;
3934 struct ieee80211_hdr
*hdr
;
3935 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3937 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
3943 presp
= rcu_dereference(ap
->probe_resp
);
3947 skb
= dev_alloc_skb(presp
->len
);
3951 memcpy(skb_put(skb
, presp
->len
), presp
->data
, presp
->len
);
3953 hdr
= (struct ieee80211_hdr
*) skb
->data
;
3954 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
3960 EXPORT_SYMBOL(ieee80211_proberesp_get
);
3962 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
3963 struct ieee80211_vif
*vif
)
3965 struct ieee80211_sub_if_data
*sdata
;
3966 struct ieee80211_if_managed
*ifmgd
;
3967 struct ieee80211_pspoll
*pspoll
;
3968 struct ieee80211_local
*local
;
3969 struct sk_buff
*skb
;
3971 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
3974 sdata
= vif_to_sdata(vif
);
3975 ifmgd
= &sdata
->u
.mgd
;
3976 local
= sdata
->local
;
3978 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
3982 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
3984 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
3985 memset(pspoll
, 0, sizeof(*pspoll
));
3986 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
3987 IEEE80211_STYPE_PSPOLL
);
3988 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
3990 /* aid in PS-Poll has its two MSBs each set to 1 */
3991 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
3993 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
3994 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
3998 EXPORT_SYMBOL(ieee80211_pspoll_get
);
4000 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
4001 struct ieee80211_vif
*vif
)
4003 struct ieee80211_hdr_3addr
*nullfunc
;
4004 struct ieee80211_sub_if_data
*sdata
;
4005 struct ieee80211_if_managed
*ifmgd
;
4006 struct ieee80211_local
*local
;
4007 struct sk_buff
*skb
;
4009 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
4012 sdata
= vif_to_sdata(vif
);
4013 ifmgd
= &sdata
->u
.mgd
;
4014 local
= sdata
->local
;
4016 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*nullfunc
));
4020 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
4022 nullfunc
= (struct ieee80211_hdr_3addr
*) skb_put(skb
,
4024 memset(nullfunc
, 0, sizeof(*nullfunc
));
4025 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
4026 IEEE80211_STYPE_NULLFUNC
|
4027 IEEE80211_FCTL_TODS
);
4028 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
4029 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
4030 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
4034 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
4036 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
4038 const u8
*ssid
, size_t ssid_len
,
4041 struct ieee80211_local
*local
= hw_to_local(hw
);
4042 struct ieee80211_hdr_3addr
*hdr
;
4043 struct sk_buff
*skb
;
4047 ie_ssid_len
= 2 + ssid_len
;
4049 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
4050 ie_ssid_len
+ tailroom
);
4054 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
4056 hdr
= (struct ieee80211_hdr_3addr
*) skb_put(skb
, sizeof(*hdr
));
4057 memset(hdr
, 0, sizeof(*hdr
));
4058 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
4059 IEEE80211_STYPE_PROBE_REQ
);
4060 eth_broadcast_addr(hdr
->addr1
);
4061 memcpy(hdr
->addr2
, src_addr
, ETH_ALEN
);
4062 eth_broadcast_addr(hdr
->addr3
);
4064 pos
= skb_put(skb
, ie_ssid_len
);
4065 *pos
++ = WLAN_EID_SSID
;
4068 memcpy(pos
, ssid
, ssid_len
);
4073 EXPORT_SYMBOL(ieee80211_probereq_get
);
4075 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
4076 const void *frame
, size_t frame_len
,
4077 const struct ieee80211_tx_info
*frame_txctl
,
4078 struct ieee80211_rts
*rts
)
4080 const struct ieee80211_hdr
*hdr
= frame
;
4082 rts
->frame_control
=
4083 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
4084 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
4086 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
4087 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
4089 EXPORT_SYMBOL(ieee80211_rts_get
);
4091 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
4092 const void *frame
, size_t frame_len
,
4093 const struct ieee80211_tx_info
*frame_txctl
,
4094 struct ieee80211_cts
*cts
)
4096 const struct ieee80211_hdr
*hdr
= frame
;
4098 cts
->frame_control
=
4099 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
4100 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
4101 frame_len
, frame_txctl
);
4102 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
4104 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
4107 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
4108 struct ieee80211_vif
*vif
)
4110 struct ieee80211_local
*local
= hw_to_local(hw
);
4111 struct sk_buff
*skb
= NULL
;
4112 struct ieee80211_tx_data tx
;
4113 struct ieee80211_sub_if_data
*sdata
;
4115 struct ieee80211_tx_info
*info
;
4116 struct ieee80211_chanctx_conf
*chanctx_conf
;
4118 sdata
= vif_to_sdata(vif
);
4121 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4126 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
4127 struct beacon_data
*beacon
=
4128 rcu_dereference(sdata
->u
.ap
.beacon
);
4130 if (!beacon
|| !beacon
->head
)
4133 ps
= &sdata
->u
.ap
.ps
;
4134 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
4135 ps
= &sdata
->u
.mesh
.ps
;
4140 if (ps
->dtim_count
!= 0 || !ps
->dtim_bc_mc
)
4141 goto out
; /* send buffered bc/mc only after DTIM beacon */
4144 skb
= skb_dequeue(&ps
->bc_buf
);
4147 local
->total_ps_buffered
--;
4149 if (!skb_queue_empty(&ps
->bc_buf
) && skb
->len
>= 2) {
4150 struct ieee80211_hdr
*hdr
=
4151 (struct ieee80211_hdr
*) skb
->data
;
4152 /* more buffered multicast/broadcast frames ==> set
4153 * MoreData flag in IEEE 802.11 header to inform PS
4155 hdr
->frame_control
|=
4156 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
4159 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
4160 sdata
= IEEE80211_DEV_TO_SUB_IF(skb
->dev
);
4161 if (!ieee80211_tx_prepare(sdata
, &tx
, NULL
, skb
))
4163 dev_kfree_skb_any(skb
);
4166 info
= IEEE80211_SKB_CB(skb
);
4168 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
4169 info
->band
= chanctx_conf
->def
.chan
->band
;
4171 if (invoke_tx_handlers(&tx
))
4178 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
4180 int ieee80211_reserve_tid(struct ieee80211_sta
*pubsta
, u8 tid
)
4182 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
4183 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
4184 struct ieee80211_local
*local
= sdata
->local
;
4188 lockdep_assert_held(&local
->sta_mtx
);
4190 /* only some cases are supported right now */
4191 switch (sdata
->vif
.type
) {
4192 case NL80211_IFTYPE_STATION
:
4193 case NL80211_IFTYPE_AP
:
4194 case NL80211_IFTYPE_AP_VLAN
:
4201 if (WARN_ON(tid
>= IEEE80211_NUM_UPS
))
4204 if (sta
->reserved_tid
== tid
) {
4209 if (sta
->reserved_tid
!= IEEE80211_TID_UNRESERVED
) {
4210 sdata_err(sdata
, "TID reservation already active\n");
4215 ieee80211_stop_vif_queues(sdata
->local
, sdata
,
4216 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID
);
4220 /* Tear down BA sessions so we stop aggregating on this TID */
4221 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
)) {
4222 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
4223 __ieee80211_stop_tx_ba_session(sta
, tid
,
4224 AGG_STOP_LOCAL_REQUEST
);
4227 queues
= BIT(sdata
->vif
.hw_queue
[ieee802_1d_to_ac
[tid
]]);
4228 __ieee80211_flush_queues(local
, sdata
, queues
, false);
4230 sta
->reserved_tid
= tid
;
4232 ieee80211_wake_vif_queues(local
, sdata
,
4233 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID
);
4235 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
))
4236 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
4242 EXPORT_SYMBOL(ieee80211_reserve_tid
);
4244 void ieee80211_unreserve_tid(struct ieee80211_sta
*pubsta
, u8 tid
)
4246 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
4247 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
4249 lockdep_assert_held(&sdata
->local
->sta_mtx
);
4251 /* only some cases are supported right now */
4252 switch (sdata
->vif
.type
) {
4253 case NL80211_IFTYPE_STATION
:
4254 case NL80211_IFTYPE_AP
:
4255 case NL80211_IFTYPE_AP_VLAN
:
4262 if (tid
!= sta
->reserved_tid
) {
4263 sdata_err(sdata
, "TID to unreserve (%d) isn't reserved\n", tid
);
4267 sta
->reserved_tid
= IEEE80211_TID_UNRESERVED
;
4269 EXPORT_SYMBOL(ieee80211_unreserve_tid
);
4271 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data
*sdata
,
4272 struct sk_buff
*skb
, int tid
,
4273 enum nl80211_band band
)
4275 int ac
= ieee802_1d_to_ac
[tid
& 7];
4277 skb_reset_mac_header(skb
);
4278 skb_reset_network_header(skb
);
4279 skb_reset_transport_header(skb
);
4281 skb_set_queue_mapping(skb
, ac
);
4282 skb
->priority
= tid
;
4284 skb
->dev
= sdata
->dev
;
4287 * The other path calling ieee80211_xmit is from the tasklet,
4288 * and while we can handle concurrent transmissions locking
4289 * requirements are that we do not come into tx with bhs on.
4292 IEEE80211_SKB_CB(skb
)->band
= band
;
4293 ieee80211_xmit(sdata
, NULL
, skb
);