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 <net/codel.h>
28 #include <net/codel_impl.h>
29 #include <asm/unaligned.h>
30 #include <net/fq_impl.h>
32 #include "ieee80211_i.h"
33 #include "driver-ops.h"
43 static inline void ieee80211_tx_stats(struct net_device
*dev
, u32 len
)
45 struct pcpu_sw_netstats
*tstats
= this_cpu_ptr(dev
->tstats
);
47 u64_stats_update_begin(&tstats
->syncp
);
49 tstats
->tx_bytes
+= len
;
50 u64_stats_update_end(&tstats
->syncp
);
53 static __le16
ieee80211_duration(struct ieee80211_tx_data
*tx
,
54 struct sk_buff
*skb
, int group_addr
,
57 int rate
, mrate
, erp
, dur
, i
, shift
= 0;
58 struct ieee80211_rate
*txrate
;
59 struct ieee80211_local
*local
= tx
->local
;
60 struct ieee80211_supported_band
*sband
;
61 struct ieee80211_hdr
*hdr
;
62 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
63 struct ieee80211_chanctx_conf
*chanctx_conf
;
67 chanctx_conf
= rcu_dereference(tx
->sdata
->vif
.chanctx_conf
);
69 shift
= ieee80211_chandef_get_shift(&chanctx_conf
->def
);
70 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
74 /* assume HW handles this */
75 if (tx
->rate
.flags
& (IEEE80211_TX_RC_MCS
| IEEE80211_TX_RC_VHT_MCS
))
79 if (WARN_ON_ONCE(tx
->rate
.idx
< 0))
82 sband
= local
->hw
.wiphy
->bands
[info
->band
];
83 txrate
= &sband
->bitrates
[tx
->rate
.idx
];
85 erp
= txrate
->flags
& IEEE80211_RATE_ERP_G
;
88 * data and mgmt (except PS Poll):
90 * - during contention period:
91 * if addr1 is group address: 0
92 * if more fragments = 0 and addr1 is individual address: time to
93 * transmit one ACK plus SIFS
94 * if more fragments = 1 and addr1 is individual address: time to
95 * transmit next fragment plus 2 x ACK plus 3 x SIFS
98 * - control response frame (CTS or ACK) shall be transmitted using the
99 * same rate as the immediately previous frame in the frame exchange
100 * sequence, if this rate belongs to the PHY mandatory rates, or else
101 * at the highest possible rate belonging to the PHY rates in the
104 hdr
= (struct ieee80211_hdr
*)skb
->data
;
105 if (ieee80211_is_ctl(hdr
->frame_control
)) {
106 /* TODO: These control frames are not currently sent by
107 * mac80211, but should they be implemented, this function
108 * needs to be updated to support duration field calculation.
110 * RTS: time needed to transmit pending data/mgmt frame plus
111 * one CTS frame plus one ACK frame plus 3 x SIFS
112 * CTS: duration of immediately previous RTS minus time
113 * required to transmit CTS and its SIFS
114 * ACK: 0 if immediately previous directed data/mgmt had
115 * more=0, with more=1 duration in ACK frame is duration
116 * from previous frame minus time needed to transmit ACK
118 * PS Poll: BIT(15) | BIT(14) | aid
124 if (0 /* FIX: data/mgmt during CFP */)
125 return cpu_to_le16(32768);
127 if (group_addr
) /* Group address as the destination - no ACK */
130 /* Individual destination address:
131 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
132 * CTS and ACK frames shall be transmitted using the highest rate in
133 * basic rate set that is less than or equal to the rate of the
134 * immediately previous frame and that is using the same modulation
135 * (CCK or OFDM). If no basic rate set matches with these requirements,
136 * the highest mandatory rate of the PHY that is less than or equal to
137 * the rate of the previous frame is used.
138 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
141 /* use lowest available if everything fails */
142 mrate
= sband
->bitrates
[0].bitrate
;
143 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
144 struct ieee80211_rate
*r
= &sband
->bitrates
[i
];
146 if (r
->bitrate
> txrate
->bitrate
)
149 if ((rate_flags
& r
->flags
) != rate_flags
)
152 if (tx
->sdata
->vif
.bss_conf
.basic_rates
& BIT(i
))
153 rate
= DIV_ROUND_UP(r
->bitrate
, 1 << shift
);
155 switch (sband
->band
) {
156 case NL80211_BAND_2GHZ
: {
158 if (tx
->sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
159 flag
= IEEE80211_RATE_MANDATORY_G
;
161 flag
= IEEE80211_RATE_MANDATORY_B
;
166 case NL80211_BAND_5GHZ
:
167 if (r
->flags
& IEEE80211_RATE_MANDATORY_A
)
170 case NL80211_BAND_60GHZ
:
171 /* TODO, for now fall through */
172 case NUM_NL80211_BANDS
:
178 /* No matching basic rate found; use highest suitable mandatory
180 rate
= DIV_ROUND_UP(mrate
, 1 << shift
);
183 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
184 if (ieee80211_is_data_qos(hdr
->frame_control
) &&
185 *(ieee80211_get_qos_ctl(hdr
)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK
)
188 /* Time needed to transmit ACK
189 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
190 * to closest integer */
191 dur
= ieee80211_frame_duration(sband
->band
, 10, rate
, erp
,
192 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
196 /* Frame is fragmented: duration increases with time needed to
197 * transmit next fragment plus ACK and 2 x SIFS. */
198 dur
*= 2; /* ACK + SIFS */
200 dur
+= ieee80211_frame_duration(sband
->band
, next_frag_len
,
201 txrate
->bitrate
, erp
,
202 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
206 return cpu_to_le16(dur
);
210 static ieee80211_tx_result debug_noinline
211 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data
*tx
)
213 struct ieee80211_local
*local
= tx
->local
;
214 struct ieee80211_if_managed
*ifmgd
;
216 /* driver doesn't support power save */
217 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
))
220 /* hardware does dynamic power save */
221 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
))
224 /* dynamic power save disabled */
225 if (local
->hw
.conf
.dynamic_ps_timeout
<= 0)
228 /* we are scanning, don't enable power save */
232 if (!local
->ps_sdata
)
235 /* No point if we're going to suspend */
236 if (local
->quiescing
)
239 /* dynamic ps is supported only in managed mode */
240 if (tx
->sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
243 ifmgd
= &tx
->sdata
->u
.mgd
;
246 * Don't wakeup from power save if u-apsd is enabled, voip ac has
247 * u-apsd enabled and the frame is in voip class. This effectively
248 * means that even if all access categories have u-apsd enabled, in
249 * practise u-apsd is only used with the voip ac. This is a
250 * workaround for the case when received voip class packets do not
251 * have correct qos tag for some reason, due the network or the
254 * Note: ifmgd->uapsd_queues access is racy here. If the value is
255 * changed via debugfs, user needs to reassociate manually to have
256 * everything in sync.
258 if ((ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
) &&
259 (ifmgd
->uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
) &&
260 skb_get_queue_mapping(tx
->skb
) == IEEE80211_AC_VO
)
263 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
264 ieee80211_stop_queues_by_reason(&local
->hw
,
265 IEEE80211_MAX_QUEUE_MAP
,
266 IEEE80211_QUEUE_STOP_REASON_PS
,
268 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
269 ieee80211_queue_work(&local
->hw
,
270 &local
->dynamic_ps_disable_work
);
273 /* Don't restart the timer if we're not disassociated */
274 if (!ifmgd
->associated
)
277 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
278 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
283 static ieee80211_tx_result debug_noinline
284 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data
*tx
)
287 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
288 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
291 if (unlikely(info
->flags
& IEEE80211_TX_CTL_INJECTED
))
294 if (unlikely(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
)) &&
295 test_bit(SDATA_STATE_OFFCHANNEL
, &tx
->sdata
->state
) &&
296 !ieee80211_is_probe_req(hdr
->frame_control
) &&
297 !ieee80211_is_nullfunc(hdr
->frame_control
))
299 * When software scanning only nullfunc frames (to notify
300 * the sleep state to the AP) and probe requests (for the
301 * active scan) are allowed, all other frames should not be
302 * sent and we should not get here, but if we do
303 * nonetheless, drop them to avoid sending them
304 * off-channel. See the link below and
305 * ieee80211_start_scan() for more.
307 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
311 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
)
314 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
317 if (tx
->flags
& IEEE80211_TX_PS_BUFFERED
)
321 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
323 if (likely(tx
->flags
& IEEE80211_TX_UNICAST
)) {
324 if (unlikely(!assoc
&&
325 ieee80211_is_data(hdr
->frame_control
))) {
326 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
327 sdata_info(tx
->sdata
,
328 "dropped data frame to not associated station %pM\n",
331 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
334 } else if (unlikely(tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
335 ieee80211_is_data(hdr
->frame_control
) &&
336 !atomic_read(&tx
->sdata
->u
.ap
.num_mcast_sta
))) {
338 * No associated STAs - no need to send multicast
347 /* This function is called whenever the AP is about to exceed the maximum limit
348 * of buffered frames for power saving STAs. This situation should not really
349 * happen often during normal operation, so dropping the oldest buffered packet
350 * from each queue should be OK to make some room for new frames. */
351 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
353 int total
= 0, purged
= 0;
355 struct ieee80211_sub_if_data
*sdata
;
356 struct sta_info
*sta
;
358 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
361 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
362 ps
= &sdata
->u
.ap
.ps
;
363 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
364 ps
= &sdata
->u
.mesh
.ps
;
368 skb
= skb_dequeue(&ps
->bc_buf
);
371 ieee80211_free_txskb(&local
->hw
, skb
);
373 total
+= skb_queue_len(&ps
->bc_buf
);
377 * Drop one frame from each station from the lowest-priority
378 * AC that has frames at all.
380 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
383 for (ac
= IEEE80211_AC_BK
; ac
>= IEEE80211_AC_VO
; ac
--) {
384 skb
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
385 total
+= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
388 ieee80211_free_txskb(&local
->hw
, skb
);
394 local
->total_ps_buffered
= total
;
395 ps_dbg_hw(&local
->hw
, "PS buffers full - purged %d frames\n", purged
);
398 static ieee80211_tx_result
399 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data
*tx
)
401 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
402 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
406 * broadcast/multicast frame
408 * If any of the associated/peer stations is in power save mode,
409 * the frame is buffered to be sent after DTIM beacon frame.
410 * This is done either by the hardware or us.
413 /* powersaving STAs currently only in AP/VLAN/mesh mode */
414 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
415 tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
419 ps
= &tx
->sdata
->bss
->ps
;
420 } else if (ieee80211_vif_is_mesh(&tx
->sdata
->vif
)) {
421 ps
= &tx
->sdata
->u
.mesh
.ps
;
427 /* no buffering for ordered frames */
428 if (ieee80211_has_order(hdr
->frame_control
))
431 if (ieee80211_is_probe_req(hdr
->frame_control
))
434 if (ieee80211_hw_check(&tx
->local
->hw
, QUEUE_CONTROL
))
435 info
->hw_queue
= tx
->sdata
->vif
.cab_queue
;
437 /* no stations in PS mode */
438 if (!atomic_read(&ps
->num_sta_ps
))
441 info
->flags
|= IEEE80211_TX_CTL_SEND_AFTER_DTIM
;
443 /* device releases frame after DTIM beacon */
444 if (!ieee80211_hw_check(&tx
->local
->hw
, HOST_BROADCAST_PS_BUFFERING
))
447 /* buffered in mac80211 */
448 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
449 purge_old_ps_buffers(tx
->local
);
451 if (skb_queue_len(&ps
->bc_buf
) >= AP_MAX_BC_BUFFER
) {
453 "BC TX buffer full - dropping the oldest frame\n");
454 ieee80211_free_txskb(&tx
->local
->hw
, skb_dequeue(&ps
->bc_buf
));
456 tx
->local
->total_ps_buffered
++;
458 skb_queue_tail(&ps
->bc_buf
, tx
->skb
);
463 static int ieee80211_use_mfp(__le16 fc
, struct sta_info
*sta
,
466 if (!ieee80211_is_mgmt(fc
))
469 if (sta
== NULL
|| !test_sta_flag(sta
, WLAN_STA_MFP
))
472 if (!ieee80211_is_robust_mgmt_frame(skb
))
478 static ieee80211_tx_result
479 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data
*tx
)
481 struct sta_info
*sta
= tx
->sta
;
482 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
483 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
484 struct ieee80211_local
*local
= tx
->local
;
489 if (unlikely((test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
490 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
491 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) &&
492 !(info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
))) {
493 int ac
= skb_get_queue_mapping(tx
->skb
);
495 if (ieee80211_is_mgmt(hdr
->frame_control
) &&
496 !ieee80211_is_bufferable_mmpdu(hdr
->frame_control
)) {
497 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
501 ps_dbg(sta
->sdata
, "STA %pM aid %d: PS buffer for AC %d\n",
502 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
503 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
504 purge_old_ps_buffers(tx
->local
);
506 /* sync with ieee80211_sta_ps_deliver_wakeup */
507 spin_lock(&sta
->ps_lock
);
509 * STA woke up the meantime and all the frames on ps_tx_buf have
510 * been queued to pending queue. No reordering can happen, go
511 * ahead and Tx the packet.
513 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
) &&
514 !test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) &&
515 !test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) {
516 spin_unlock(&sta
->ps_lock
);
520 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
521 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
523 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
525 ieee80211_free_txskb(&local
->hw
, old
);
527 tx
->local
->total_ps_buffered
++;
529 info
->control
.jiffies
= jiffies
;
530 info
->control
.vif
= &tx
->sdata
->vif
;
531 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
532 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
533 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
534 spin_unlock(&sta
->ps_lock
);
536 if (!timer_pending(&local
->sta_cleanup
))
537 mod_timer(&local
->sta_cleanup
,
538 round_jiffies(jiffies
+
539 STA_INFO_CLEANUP_INTERVAL
));
542 * We queued up some frames, so the TIM bit might
543 * need to be set, recalculate it.
545 sta_info_recalc_tim(sta
);
548 } else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
550 "STA %pM in PS mode, but polling/in SP -> send frame\n",
557 static ieee80211_tx_result debug_noinline
558 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
560 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
563 if (tx
->flags
& IEEE80211_TX_UNICAST
)
564 return ieee80211_tx_h_unicast_ps_buf(tx
);
566 return ieee80211_tx_h_multicast_ps_buf(tx
);
569 static ieee80211_tx_result debug_noinline
570 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
572 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
574 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
)) {
575 if (tx
->sdata
->control_port_no_encrypt
)
576 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
577 info
->control
.flags
|= IEEE80211_TX_CTRL_PORT_CTRL_PROTO
;
578 info
->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
584 static ieee80211_tx_result debug_noinline
585 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
587 struct ieee80211_key
*key
;
588 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
589 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
591 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
))
594 (key
= rcu_dereference(tx
->sta
->ptk
[tx
->sta
->ptk_idx
])))
596 else if (ieee80211_is_group_privacy_action(tx
->skb
) &&
597 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
599 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
600 is_multicast_ether_addr(hdr
->addr1
) &&
601 ieee80211_is_robust_mgmt_frame(tx
->skb
) &&
602 (key
= rcu_dereference(tx
->sdata
->default_mgmt_key
)))
604 else if (is_multicast_ether_addr(hdr
->addr1
) &&
605 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
607 else if (!is_multicast_ether_addr(hdr
->addr1
) &&
608 (key
= rcu_dereference(tx
->sdata
->default_unicast_key
)))
614 bool skip_hw
= false;
616 /* TODO: add threshold stuff again */
618 switch (tx
->key
->conf
.cipher
) {
619 case WLAN_CIPHER_SUITE_WEP40
:
620 case WLAN_CIPHER_SUITE_WEP104
:
621 case WLAN_CIPHER_SUITE_TKIP
:
622 if (!ieee80211_is_data_present(hdr
->frame_control
))
625 case WLAN_CIPHER_SUITE_CCMP
:
626 case WLAN_CIPHER_SUITE_CCMP_256
:
627 case WLAN_CIPHER_SUITE_GCMP
:
628 case WLAN_CIPHER_SUITE_GCMP_256
:
629 if (!ieee80211_is_data_present(hdr
->frame_control
) &&
630 !ieee80211_use_mfp(hdr
->frame_control
, tx
->sta
,
632 !ieee80211_is_group_privacy_action(tx
->skb
))
635 skip_hw
= (tx
->key
->conf
.flags
&
636 IEEE80211_KEY_FLAG_SW_MGMT_TX
) &&
637 ieee80211_is_mgmt(hdr
->frame_control
);
639 case WLAN_CIPHER_SUITE_AES_CMAC
:
640 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
641 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
642 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
643 if (!ieee80211_is_mgmt(hdr
->frame_control
))
648 if (unlikely(tx
->key
&& tx
->key
->flags
& KEY_FLAG_TAINTED
&&
649 !ieee80211_is_deauth(hdr
->frame_control
)))
652 if (!skip_hw
&& tx
->key
&&
653 tx
->key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
)
654 info
->control
.hw_key
= &tx
->key
->conf
;
660 static ieee80211_tx_result debug_noinline
661 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data
*tx
)
663 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
664 struct ieee80211_hdr
*hdr
= (void *)tx
->skb
->data
;
665 struct ieee80211_supported_band
*sband
;
667 struct ieee80211_tx_rate_control txrc
;
668 struct ieee80211_sta_rates
*ratetbl
= NULL
;
671 memset(&txrc
, 0, sizeof(txrc
));
673 sband
= tx
->local
->hw
.wiphy
->bands
[info
->band
];
675 len
= min_t(u32
, tx
->skb
->len
+ FCS_LEN
,
676 tx
->local
->hw
.wiphy
->frag_threshold
);
678 /* set up the tx rate control struct we give the RC algo */
679 txrc
.hw
= &tx
->local
->hw
;
681 txrc
.bss_conf
= &tx
->sdata
->vif
.bss_conf
;
683 txrc
.reported_rate
.idx
= -1;
684 txrc
.rate_idx_mask
= tx
->sdata
->rc_rateidx_mask
[info
->band
];
685 if (txrc
.rate_idx_mask
== (1 << sband
->n_bitrates
) - 1)
686 txrc
.max_rate_idx
= -1;
688 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
690 if (tx
->sdata
->rc_has_mcs_mask
[info
->band
])
691 txrc
.rate_idx_mcs_mask
=
692 tx
->sdata
->rc_rateidx_mcs_mask
[info
->band
];
694 txrc
.bss
= (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
695 tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
||
696 tx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
||
697 tx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
);
699 /* set up RTS protection if desired */
700 if (len
> tx
->local
->hw
.wiphy
->rts_threshold
) {
704 info
->control
.use_rts
= txrc
.rts
;
705 info
->control
.use_cts_prot
= tx
->sdata
->vif
.bss_conf
.use_cts_prot
;
708 * Use short preamble if the BSS can handle it, but not for
709 * management frames unless we know the receiver can handle
710 * that -- the management frame might be to a station that
711 * just wants a probe response.
713 if (tx
->sdata
->vif
.bss_conf
.use_short_preamble
&&
714 (ieee80211_is_data(hdr
->frame_control
) ||
715 (tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_SHORT_PREAMBLE
))))
716 txrc
.short_preamble
= true;
718 info
->control
.short_preamble
= txrc
.short_preamble
;
720 /* don't ask rate control when rate already injected via radiotap */
721 if (info
->control
.flags
& IEEE80211_TX_CTRL_RATE_INJECT
)
725 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
728 * Lets not bother rate control if we're associated and cannot
729 * talk to the sta. This should not happen.
731 if (WARN(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
) && assoc
&&
732 !rate_usable_index_exists(sband
, &tx
->sta
->sta
),
733 "%s: Dropped data frame as no usable bitrate found while "
734 "scanning and associated. Target station: "
735 "%pM on %d GHz band\n",
736 tx
->sdata
->name
, hdr
->addr1
,
741 * If we're associated with the sta at this point we know we can at
742 * least send the frame at the lowest bit rate.
744 rate_control_get_rate(tx
->sdata
, tx
->sta
, &txrc
);
746 if (tx
->sta
&& !info
->control
.skip_table
)
747 ratetbl
= rcu_dereference(tx
->sta
->sta
.rates
);
749 if (unlikely(info
->control
.rates
[0].idx
< 0)) {
751 struct ieee80211_tx_rate rate
= {
752 .idx
= ratetbl
->rate
[0].idx
,
753 .flags
= ratetbl
->rate
[0].flags
,
754 .count
= ratetbl
->rate
[0].count
757 if (ratetbl
->rate
[0].idx
< 0)
765 tx
->rate
= info
->control
.rates
[0];
768 if (txrc
.reported_rate
.idx
< 0) {
769 txrc
.reported_rate
= tx
->rate
;
770 if (tx
->sta
&& ieee80211_is_data(hdr
->frame_control
))
771 tx
->sta
->tx_stats
.last_rate
= txrc
.reported_rate
;
773 tx
->sta
->tx_stats
.last_rate
= txrc
.reported_rate
;
778 if (unlikely(!info
->control
.rates
[0].count
))
779 info
->control
.rates
[0].count
= 1;
781 if (WARN_ON_ONCE((info
->control
.rates
[0].count
> 1) &&
782 (info
->flags
& IEEE80211_TX_CTL_NO_ACK
)))
783 info
->control
.rates
[0].count
= 1;
788 static __le16
ieee80211_tx_next_seq(struct sta_info
*sta
, int tid
)
790 u16
*seq
= &sta
->tid_seq
[tid
];
791 __le16 ret
= cpu_to_le16(*seq
);
793 /* Increase the sequence number. */
794 *seq
= (*seq
+ 0x10) & IEEE80211_SCTL_SEQ
;
799 static struct txq_info
*ieee80211_get_txq(struct ieee80211_local
*local
,
800 struct ieee80211_vif
*vif
,
801 struct ieee80211_sta
*pubsta
,
804 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
805 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
806 struct ieee80211_txq
*txq
= NULL
;
808 if ((info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
) ||
809 (info
->control
.flags
& IEEE80211_TX_CTRL_PS_RESPONSE
))
812 if (!ieee80211_is_data(hdr
->frame_control
))
816 u8 tid
= skb
->priority
& IEEE80211_QOS_CTL_TID_MASK
;
818 txq
= pubsta
->txq
[tid
];
826 return to_txq_info(txq
);
829 static ieee80211_tx_result debug_noinline
830 ieee80211_tx_h_sequence(struct ieee80211_tx_data
*tx
)
832 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
833 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
838 * Packet injection may want to control the sequence
839 * number, if we have no matching interface then we
840 * neither assign one ourselves nor ask the driver to.
842 if (unlikely(info
->control
.vif
->type
== NL80211_IFTYPE_MONITOR
))
845 if (unlikely(ieee80211_is_ctl(hdr
->frame_control
)))
848 if (ieee80211_hdrlen(hdr
->frame_control
) < 24)
851 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
855 * Anything but QoS data that has a sequence number field
856 * (is long enough) gets a sequence number from the global
857 * counter. QoS data frames with a multicast destination
858 * also use the global counter (802.11-2012 9.3.2.10).
860 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
861 is_multicast_ether_addr(hdr
->addr1
)) {
862 /* driver should assign sequence number */
863 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
864 /* for pure STA mode without beacons, we can do it */
865 hdr
->seq_ctrl
= cpu_to_le16(tx
->sdata
->sequence_number
);
866 tx
->sdata
->sequence_number
+= 0x10;
868 tx
->sta
->tx_stats
.msdu
[IEEE80211_NUM_TIDS
]++;
873 * This should be true for injected/management frames only, for
874 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
875 * above since they are not QoS-data frames.
880 /* include per-STA, per-TID sequence counter */
882 qc
= ieee80211_get_qos_ctl(hdr
);
883 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
884 tx
->sta
->tx_stats
.msdu
[tid
]++;
886 if (!ieee80211_get_txq(tx
->local
, info
->control
.vif
, &tx
->sta
->sta
,
888 hdr
->seq_ctrl
= ieee80211_tx_next_seq(tx
->sta
, tid
);
893 static int ieee80211_fragment(struct ieee80211_tx_data
*tx
,
894 struct sk_buff
*skb
, int hdrlen
,
897 struct ieee80211_local
*local
= tx
->local
;
898 struct ieee80211_tx_info
*info
;
900 int per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
901 int pos
= hdrlen
+ per_fragm
;
902 int rem
= skb
->len
- hdrlen
- per_fragm
;
904 if (WARN_ON(rem
< 0))
907 /* first fragment was already added to queue by caller */
910 int fraglen
= per_fragm
;
915 tmp
= dev_alloc_skb(local
->tx_headroom
+
917 tx
->sdata
->encrypt_headroom
+
918 IEEE80211_ENCRYPT_TAILROOM
);
922 __skb_queue_tail(&tx
->skbs
, tmp
);
925 local
->tx_headroom
+ tx
->sdata
->encrypt_headroom
);
927 /* copy control information */
928 memcpy(tmp
->cb
, skb
->cb
, sizeof(tmp
->cb
));
930 info
= IEEE80211_SKB_CB(tmp
);
931 info
->flags
&= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT
|
932 IEEE80211_TX_CTL_FIRST_FRAGMENT
);
935 info
->flags
|= IEEE80211_TX_CTL_MORE_FRAMES
;
937 skb_copy_queue_mapping(tmp
, skb
);
938 tmp
->priority
= skb
->priority
;
941 /* copy header and data */
942 memcpy(skb_put(tmp
, hdrlen
), skb
->data
, hdrlen
);
943 memcpy(skb_put(tmp
, fraglen
), skb
->data
+ pos
, fraglen
);
948 /* adjust first fragment's length */
949 skb_trim(skb
, hdrlen
+ per_fragm
);
953 static ieee80211_tx_result debug_noinline
954 ieee80211_tx_h_fragment(struct ieee80211_tx_data
*tx
)
956 struct sk_buff
*skb
= tx
->skb
;
957 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
958 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
959 int frag_threshold
= tx
->local
->hw
.wiphy
->frag_threshold
;
963 /* no matter what happens, tx->skb moves to tx->skbs */
964 __skb_queue_tail(&tx
->skbs
, skb
);
967 if (info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)
970 if (tx
->local
->ops
->set_frag_threshold
)
974 * Warn when submitting a fragmented A-MPDU frame and drop it.
975 * This scenario is handled in ieee80211_tx_prepare but extra
976 * caution taken here as fragmented ampdu may cause Tx stop.
978 if (WARN_ON(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
981 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
983 /* internal error, why isn't DONTFRAG set? */
984 if (WARN_ON(skb
->len
+ FCS_LEN
<= frag_threshold
))
988 * Now fragment the frame. This will allocate all the fragments and
989 * chain them (using skb as the first fragment) to skb->next.
990 * During transmission, we will remove the successfully transmitted
991 * fragments from this list. When the low-level driver rejects one
992 * of the fragments then we will simply pretend to accept the skb
993 * but store it away as pending.
995 if (ieee80211_fragment(tx
, skb
, hdrlen
, frag_threshold
))
998 /* update duration/seq/flags of fragments */
1001 skb_queue_walk(&tx
->skbs
, skb
) {
1002 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
1004 hdr
= (void *)skb
->data
;
1005 info
= IEEE80211_SKB_CB(skb
);
1007 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1008 hdr
->frame_control
|= morefrags
;
1010 * No multi-rate retries for fragmented frames, that
1011 * would completely throw off the NAV at other STAs.
1013 info
->control
.rates
[1].idx
= -1;
1014 info
->control
.rates
[2].idx
= -1;
1015 info
->control
.rates
[3].idx
= -1;
1016 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 4);
1017 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
1019 hdr
->frame_control
&= ~morefrags
;
1021 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
1028 static ieee80211_tx_result debug_noinline
1029 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
1031 struct sk_buff
*skb
;
1037 skb_queue_walk(&tx
->skbs
, skb
) {
1038 ac
= skb_get_queue_mapping(skb
);
1039 tx
->sta
->tx_stats
.bytes
[ac
] += skb
->len
;
1042 tx
->sta
->tx_stats
.packets
[ac
]++;
1047 static ieee80211_tx_result debug_noinline
1048 ieee80211_tx_h_encrypt(struct ieee80211_tx_data
*tx
)
1053 switch (tx
->key
->conf
.cipher
) {
1054 case WLAN_CIPHER_SUITE_WEP40
:
1055 case WLAN_CIPHER_SUITE_WEP104
:
1056 return ieee80211_crypto_wep_encrypt(tx
);
1057 case WLAN_CIPHER_SUITE_TKIP
:
1058 return ieee80211_crypto_tkip_encrypt(tx
);
1059 case WLAN_CIPHER_SUITE_CCMP
:
1060 return ieee80211_crypto_ccmp_encrypt(
1061 tx
, IEEE80211_CCMP_MIC_LEN
);
1062 case WLAN_CIPHER_SUITE_CCMP_256
:
1063 return ieee80211_crypto_ccmp_encrypt(
1064 tx
, IEEE80211_CCMP_256_MIC_LEN
);
1065 case WLAN_CIPHER_SUITE_AES_CMAC
:
1066 return ieee80211_crypto_aes_cmac_encrypt(tx
);
1067 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
1068 return ieee80211_crypto_aes_cmac_256_encrypt(tx
);
1069 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
1070 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
1071 return ieee80211_crypto_aes_gmac_encrypt(tx
);
1072 case WLAN_CIPHER_SUITE_GCMP
:
1073 case WLAN_CIPHER_SUITE_GCMP_256
:
1074 return ieee80211_crypto_gcmp_encrypt(tx
);
1076 return ieee80211_crypto_hw_encrypt(tx
);
1082 static ieee80211_tx_result debug_noinline
1083 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data
*tx
)
1085 struct sk_buff
*skb
;
1086 struct ieee80211_hdr
*hdr
;
1090 skb_queue_walk(&tx
->skbs
, skb
) {
1091 hdr
= (void *) skb
->data
;
1092 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
)))
1093 break; /* must not overwrite AID */
1094 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1095 struct sk_buff
*next
= skb_queue_next(&tx
->skbs
, skb
);
1096 next_len
= next
->len
;
1099 group_addr
= is_multicast_ether_addr(hdr
->addr1
);
1102 ieee80211_duration(tx
, skb
, group_addr
, next_len
);
1108 /* actual transmit path */
1110 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data
*tx
,
1111 struct sk_buff
*skb
,
1112 struct ieee80211_tx_info
*info
,
1113 struct tid_ampdu_tx
*tid_tx
,
1116 bool queued
= false;
1117 bool reset_agg_timer
= false;
1118 struct sk_buff
*purge_skb
= NULL
;
1120 if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1121 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1122 reset_agg_timer
= true;
1123 } else if (test_bit(HT_AGG_STATE_WANT_START
, &tid_tx
->state
)) {
1125 * nothing -- this aggregation session is being started
1126 * but that might still fail with the driver
1128 } else if (!tx
->sta
->sta
.txq
[tid
]) {
1129 spin_lock(&tx
->sta
->lock
);
1131 * Need to re-check now, because we may get here
1133 * 1) in the window during which the setup is actually
1134 * already done, but not marked yet because not all
1135 * packets are spliced over to the driver pending
1136 * queue yet -- if this happened we acquire the lock
1137 * either before or after the splice happens, but
1138 * need to recheck which of these cases happened.
1140 * 2) during session teardown, if the OPERATIONAL bit
1141 * was cleared due to the teardown but the pointer
1142 * hasn't been assigned NULL yet (or we loaded it
1143 * before it was assigned) -- in this case it may
1144 * now be NULL which means we should just let the
1145 * packet pass through because splicing the frames
1146 * back is already done.
1148 tid_tx
= rcu_dereference_protected_tid_tx(tx
->sta
, tid
);
1151 /* do nothing, let packet pass through */
1152 } else if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1153 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1154 reset_agg_timer
= true;
1157 if (info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
) {
1158 clear_sta_flag(tx
->sta
, WLAN_STA_SP
);
1159 ps_dbg(tx
->sta
->sdata
,
1160 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1161 tx
->sta
->sta
.addr
, tx
->sta
->sta
.aid
);
1163 info
->control
.vif
= &tx
->sdata
->vif
;
1164 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1165 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
1166 __skb_queue_tail(&tid_tx
->pending
, skb
);
1167 if (skb_queue_len(&tid_tx
->pending
) > STA_MAX_TX_BUFFER
)
1168 purge_skb
= __skb_dequeue(&tid_tx
->pending
);
1170 spin_unlock(&tx
->sta
->lock
);
1173 ieee80211_free_txskb(&tx
->local
->hw
, purge_skb
);
1176 /* reset session timer */
1177 if (reset_agg_timer
&& tid_tx
->timeout
)
1178 tid_tx
->last_tx
= jiffies
;
1185 * pass %NULL for the station if unknown, a valid pointer if known
1186 * or an ERR_PTR() if the station is known not to exist
1188 static ieee80211_tx_result
1189 ieee80211_tx_prepare(struct ieee80211_sub_if_data
*sdata
,
1190 struct ieee80211_tx_data
*tx
,
1191 struct sta_info
*sta
, struct sk_buff
*skb
)
1193 struct ieee80211_local
*local
= sdata
->local
;
1194 struct ieee80211_hdr
*hdr
;
1195 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1199 memset(tx
, 0, sizeof(*tx
));
1203 __skb_queue_head_init(&tx
->skbs
);
1206 * If this flag is set to true anywhere, and we get here,
1207 * we are doing the needed processing, so remove the flag
1210 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1212 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1218 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1219 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1220 if (!tx
->sta
&& sdata
->wdev
.use_4addr
)
1222 } else if (info
->flags
& (IEEE80211_TX_INTFL_NL80211_FRAME_TX
|
1223 IEEE80211_TX_CTL_INJECTED
) ||
1224 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1225 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1227 if (!tx
->sta
&& !is_multicast_ether_addr(hdr
->addr1
))
1228 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1231 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1232 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1233 ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
) &&
1234 !ieee80211_hw_check(&local
->hw
, TX_AMPDU_SETUP_IN_HW
)) {
1235 struct tid_ampdu_tx
*tid_tx
;
1237 qc
= ieee80211_get_qos_ctl(hdr
);
1238 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
1240 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1244 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1247 if (unlikely(queued
))
1252 if (is_multicast_ether_addr(hdr
->addr1
)) {
1253 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1254 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1256 tx
->flags
|= IEEE80211_TX_UNICAST
;
1258 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1259 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1260 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1261 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1262 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1266 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1267 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
)) {
1268 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1269 ieee80211_check_fast_xmit(tx
->sta
);
1272 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1277 static void ieee80211_set_skb_enqueue_time(struct sk_buff
*skb
)
1279 IEEE80211_SKB_CB(skb
)->control
.enqueue_time
= codel_get_time();
1282 static void ieee80211_set_skb_vif(struct sk_buff
*skb
, struct txq_info
*txqi
)
1284 IEEE80211_SKB_CB(skb
)->control
.vif
= txqi
->txq
.vif
;
1287 static u32
codel_skb_len_func(const struct sk_buff
*skb
)
1292 static codel_time_t
codel_skb_time_func(const struct sk_buff
*skb
)
1294 const struct ieee80211_tx_info
*info
;
1296 info
= (const struct ieee80211_tx_info
*)skb
->cb
;
1297 return info
->control
.enqueue_time
;
1300 static struct sk_buff
*codel_dequeue_func(struct codel_vars
*cvars
,
1303 struct ieee80211_local
*local
;
1304 struct txq_info
*txqi
;
1306 struct fq_flow
*flow
;
1309 local
= vif_to_sdata(txqi
->txq
.vif
)->local
;
1312 if (cvars
== &txqi
->def_cvars
)
1313 flow
= &txqi
->def_flow
;
1315 flow
= &fq
->flows
[cvars
- local
->cvars
];
1317 return fq_flow_dequeue(fq
, flow
);
1320 static void codel_drop_func(struct sk_buff
*skb
,
1323 struct ieee80211_local
*local
;
1324 struct ieee80211_hw
*hw
;
1325 struct txq_info
*txqi
;
1328 local
= vif_to_sdata(txqi
->txq
.vif
)->local
;
1331 ieee80211_free_txskb(hw
, skb
);
1334 static struct sk_buff
*fq_tin_dequeue_func(struct fq
*fq
,
1336 struct fq_flow
*flow
)
1338 struct ieee80211_local
*local
;
1339 struct txq_info
*txqi
;
1340 struct codel_vars
*cvars
;
1341 struct codel_params
*cparams
;
1342 struct codel_stats
*cstats
;
1344 local
= container_of(fq
, struct ieee80211_local
, fq
);
1345 txqi
= container_of(tin
, struct txq_info
, tin
);
1346 cparams
= &local
->cparams
;
1347 cstats
= &local
->cstats
;
1349 if (flow
== &txqi
->def_flow
)
1350 cvars
= &txqi
->def_cvars
;
1352 cvars
= &local
->cvars
[flow
- fq
->flows
];
1354 return codel_dequeue(txqi
,
1360 codel_skb_time_func
,
1362 codel_dequeue_func
);
1365 static void fq_skb_free_func(struct fq
*fq
,
1367 struct fq_flow
*flow
,
1368 struct sk_buff
*skb
)
1370 struct ieee80211_local
*local
;
1372 local
= container_of(fq
, struct ieee80211_local
, fq
);
1373 ieee80211_free_txskb(&local
->hw
, skb
);
1376 static struct fq_flow
*fq_flow_get_default_func(struct fq
*fq
,
1379 struct sk_buff
*skb
)
1381 struct txq_info
*txqi
;
1383 txqi
= container_of(tin
, struct txq_info
, tin
);
1384 return &txqi
->def_flow
;
1387 static void ieee80211_txq_enqueue(struct ieee80211_local
*local
,
1388 struct txq_info
*txqi
,
1389 struct sk_buff
*skb
)
1391 struct fq
*fq
= &local
->fq
;
1392 struct fq_tin
*tin
= &txqi
->tin
;
1394 ieee80211_set_skb_enqueue_time(skb
);
1395 fq_tin_enqueue(fq
, tin
, skb
,
1397 fq_flow_get_default_func
);
1400 void ieee80211_txq_init(struct ieee80211_sub_if_data
*sdata
,
1401 struct sta_info
*sta
,
1402 struct txq_info
*txqi
, int tid
)
1404 fq_tin_init(&txqi
->tin
);
1405 fq_flow_init(&txqi
->def_flow
);
1406 codel_vars_init(&txqi
->def_cvars
);
1408 txqi
->txq
.vif
= &sdata
->vif
;
1411 txqi
->txq
.sta
= &sta
->sta
;
1412 sta
->sta
.txq
[tid
] = &txqi
->txq
;
1413 txqi
->txq
.tid
= tid
;
1414 txqi
->txq
.ac
= ieee802_1d_to_ac
[tid
& 7];
1416 sdata
->vif
.txq
= &txqi
->txq
;
1418 txqi
->txq
.ac
= IEEE80211_AC_BE
;
1422 void ieee80211_txq_purge(struct ieee80211_local
*local
,
1423 struct txq_info
*txqi
)
1425 struct fq
*fq
= &local
->fq
;
1426 struct fq_tin
*tin
= &txqi
->tin
;
1428 fq_tin_reset(fq
, tin
, fq_skb_free_func
);
1431 int ieee80211_txq_setup_flows(struct ieee80211_local
*local
)
1433 struct fq
*fq
= &local
->fq
;
1437 if (!local
->ops
->wake_tx_queue
)
1440 ret
= fq_init(fq
, 4096);
1444 codel_params_init(&local
->cparams
);
1445 codel_stats_init(&local
->cstats
);
1446 local
->cparams
.interval
= MS2TIME(100);
1447 local
->cparams
.target
= MS2TIME(20);
1448 local
->cparams
.ecn
= true;
1450 local
->cvars
= kcalloc(fq
->flows_cnt
, sizeof(local
->cvars
[0]),
1452 if (!local
->cvars
) {
1453 spin_lock_bh(&fq
->lock
);
1454 fq_reset(fq
, fq_skb_free_func
);
1455 spin_unlock_bh(&fq
->lock
);
1459 for (i
= 0; i
< fq
->flows_cnt
; i
++)
1460 codel_vars_init(&local
->cvars
[i
]);
1465 void ieee80211_txq_teardown_flows(struct ieee80211_local
*local
)
1467 struct fq
*fq
= &local
->fq
;
1469 if (!local
->ops
->wake_tx_queue
)
1472 kfree(local
->cvars
);
1473 local
->cvars
= NULL
;
1475 spin_lock_bh(&fq
->lock
);
1476 fq_reset(fq
, fq_skb_free_func
);
1477 spin_unlock_bh(&fq
->lock
);
1480 struct sk_buff
*ieee80211_tx_dequeue(struct ieee80211_hw
*hw
,
1481 struct ieee80211_txq
*txq
)
1483 struct ieee80211_local
*local
= hw_to_local(hw
);
1484 struct txq_info
*txqi
= container_of(txq
, struct txq_info
, txq
);
1485 struct ieee80211_hdr
*hdr
;
1486 struct sk_buff
*skb
= NULL
;
1487 struct fq
*fq
= &local
->fq
;
1488 struct fq_tin
*tin
= &txqi
->tin
;
1490 spin_lock_bh(&fq
->lock
);
1492 if (test_bit(IEEE80211_TXQ_STOP
, &txqi
->flags
))
1495 skb
= fq_tin_dequeue(fq
, tin
, fq_tin_dequeue_func
);
1499 ieee80211_set_skb_vif(skb
, txqi
);
1501 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1502 if (txq
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
)) {
1503 struct sta_info
*sta
= container_of(txq
->sta
, struct sta_info
,
1505 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1507 hdr
->seq_ctrl
= ieee80211_tx_next_seq(sta
, txq
->tid
);
1508 if (test_bit(IEEE80211_TXQ_AMPDU
, &txqi
->flags
))
1509 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1511 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
1515 spin_unlock_bh(&fq
->lock
);
1517 if (skb
&& skb_has_frag_list(skb
) &&
1518 !ieee80211_hw_check(&local
->hw
, TX_FRAG_LIST
)) {
1519 if (skb_linearize(skb
)) {
1520 ieee80211_free_txskb(&local
->hw
, skb
);
1527 EXPORT_SYMBOL(ieee80211_tx_dequeue
);
1529 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1530 struct ieee80211_vif
*vif
,
1531 struct ieee80211_sta
*sta
,
1532 struct sk_buff_head
*skbs
,
1535 struct ieee80211_tx_control control
= {};
1536 struct fq
*fq
= &local
->fq
;
1537 struct sk_buff
*skb
, *tmp
;
1538 struct txq_info
*txqi
;
1539 unsigned long flags
;
1541 skb_queue_walk_safe(skbs
, skb
, tmp
) {
1542 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1543 int q
= info
->hw_queue
;
1545 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1546 if (WARN_ON_ONCE(q
>= local
->hw
.queues
)) {
1547 __skb_unlink(skb
, skbs
);
1548 ieee80211_free_txskb(&local
->hw
, skb
);
1553 txqi
= ieee80211_get_txq(local
, vif
, sta
, skb
);
1555 info
->control
.vif
= vif
;
1557 __skb_unlink(skb
, skbs
);
1559 spin_lock_bh(&fq
->lock
);
1560 ieee80211_txq_enqueue(local
, txqi
, skb
);
1561 spin_unlock_bh(&fq
->lock
);
1563 drv_wake_tx_queue(local
, txqi
);
1568 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1569 if (local
->queue_stop_reasons
[q
] ||
1570 (!txpending
&& !skb_queue_empty(&local
->pending
[q
]))) {
1571 if (unlikely(info
->flags
&
1572 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
)) {
1573 if (local
->queue_stop_reasons
[q
] &
1574 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL
)) {
1576 * Drop off-channel frames if queues
1577 * are stopped for any reason other
1578 * than off-channel operation. Never
1581 spin_unlock_irqrestore(
1582 &local
->queue_stop_reason_lock
,
1584 ieee80211_purge_tx_queue(&local
->hw
,
1591 * Since queue is stopped, queue up frames for
1592 * later transmission from the tx-pending
1593 * tasklet when the queue is woken again.
1596 skb_queue_splice_init(skbs
,
1597 &local
->pending
[q
]);
1599 skb_queue_splice_tail_init(skbs
,
1600 &local
->pending
[q
]);
1602 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1607 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1609 info
->control
.vif
= vif
;
1612 __skb_unlink(skb
, skbs
);
1613 drv_tx(local
, &control
, skb
);
1620 * Returns false if the frame couldn't be transmitted but was queued instead.
1622 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1623 struct sk_buff_head
*skbs
, int led_len
,
1624 struct sta_info
*sta
, bool txpending
)
1626 struct ieee80211_tx_info
*info
;
1627 struct ieee80211_sub_if_data
*sdata
;
1628 struct ieee80211_vif
*vif
;
1629 struct ieee80211_sta
*pubsta
;
1630 struct sk_buff
*skb
;
1634 if (WARN_ON(skb_queue_empty(skbs
)))
1637 skb
= skb_peek(skbs
);
1638 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1639 info
= IEEE80211_SKB_CB(skb
);
1640 sdata
= vif_to_sdata(info
->control
.vif
);
1641 if (sta
&& !sta
->uploaded
)
1649 switch (sdata
->vif
.type
) {
1650 case NL80211_IFTYPE_MONITOR
:
1651 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
1655 sdata
= rcu_dereference(local
->monitor_sdata
);
1659 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1660 } else if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
)) {
1661 ieee80211_purge_tx_queue(&local
->hw
, skbs
);
1666 case NL80211_IFTYPE_AP_VLAN
:
1667 sdata
= container_of(sdata
->bss
,
1668 struct ieee80211_sub_if_data
, u
.ap
);
1675 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1678 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1680 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1686 * Invoke TX handlers, return 0 on success and non-zero if the
1687 * frame was dropped or queued.
1689 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1691 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1692 ieee80211_tx_result res
= TX_DROP
;
1694 #define CALL_TXH(txh) \
1697 if (res != TX_CONTINUE) \
1701 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1702 CALL_TXH(ieee80211_tx_h_check_assoc
);
1703 CALL_TXH(ieee80211_tx_h_ps_buf
);
1704 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1705 CALL_TXH(ieee80211_tx_h_select_key
);
1706 if (!ieee80211_hw_check(&tx
->local
->hw
, HAS_RATE_CONTROL
))
1707 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1709 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1710 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1715 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1716 CALL_TXH(ieee80211_tx_h_sequence
);
1717 CALL_TXH(ieee80211_tx_h_fragment
);
1718 /* handlers after fragment must be aware of tx info fragmentation! */
1719 CALL_TXH(ieee80211_tx_h_stats
);
1720 CALL_TXH(ieee80211_tx_h_encrypt
);
1721 if (!ieee80211_hw_check(&tx
->local
->hw
, HAS_RATE_CONTROL
))
1722 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1726 if (unlikely(res
== TX_DROP
)) {
1727 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1729 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1731 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1733 } else if (unlikely(res
== TX_QUEUED
)) {
1734 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1741 bool ieee80211_tx_prepare_skb(struct ieee80211_hw
*hw
,
1742 struct ieee80211_vif
*vif
, struct sk_buff
*skb
,
1743 int band
, struct ieee80211_sta
**sta
)
1745 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1746 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1747 struct ieee80211_tx_data tx
;
1748 struct sk_buff
*skb2
;
1750 if (ieee80211_tx_prepare(sdata
, &tx
, NULL
, skb
) == TX_DROP
)
1754 info
->control
.vif
= vif
;
1755 info
->hw_queue
= vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1757 if (invoke_tx_handlers(&tx
))
1762 *sta
= &tx
.sta
->sta
;
1767 /* this function isn't suitable for fragmented data frames */
1768 skb2
= __skb_dequeue(&tx
.skbs
);
1769 if (WARN_ON(skb2
!= skb
|| !skb_queue_empty(&tx
.skbs
))) {
1770 ieee80211_free_txskb(hw
, skb2
);
1771 ieee80211_purge_tx_queue(hw
, &tx
.skbs
);
1777 EXPORT_SYMBOL(ieee80211_tx_prepare_skb
);
1780 * Returns false if the frame couldn't be transmitted but was queued instead.
1782 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1783 struct sta_info
*sta
, struct sk_buff
*skb
,
1786 struct ieee80211_local
*local
= sdata
->local
;
1787 struct ieee80211_tx_data tx
;
1788 ieee80211_tx_result res_prepare
;
1789 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1793 if (unlikely(skb
->len
< 10)) {
1798 /* initialises tx */
1800 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, sta
, skb
);
1802 if (unlikely(res_prepare
== TX_DROP
)) {
1803 ieee80211_free_txskb(&local
->hw
, skb
);
1805 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1809 /* set up hw_queue value early */
1810 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1811 !ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
1813 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1815 if (!invoke_tx_handlers(&tx
))
1816 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1822 /* device xmit handlers */
1824 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1825 struct sk_buff
*skb
,
1826 int head_need
, bool may_encrypt
)
1828 struct ieee80211_local
*local
= sdata
->local
;
1831 if (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
) {
1832 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1833 tail_need
-= skb_tailroom(skb
);
1834 tail_need
= max_t(int, tail_need
, 0);
1837 if (skb_cloned(skb
) &&
1838 (!ieee80211_hw_check(&local
->hw
, SUPPORTS_CLONED_SKBS
) ||
1839 !skb_clone_writable(skb
, ETH_HLEN
) ||
1840 (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
)))
1841 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1842 else if (head_need
|| tail_need
)
1843 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1847 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1848 wiphy_debug(local
->hw
.wiphy
,
1849 "failed to reallocate TX buffer\n");
1856 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
,
1857 struct sta_info
*sta
, struct sk_buff
*skb
)
1859 struct ieee80211_local
*local
= sdata
->local
;
1860 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1861 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1865 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1867 headroom
= local
->tx_headroom
;
1869 headroom
+= sdata
->encrypt_headroom
;
1870 headroom
-= skb_headroom(skb
);
1871 headroom
= max_t(int, 0, headroom
);
1873 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1874 ieee80211_free_txskb(&local
->hw
, skb
);
1878 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1879 info
->control
.vif
= &sdata
->vif
;
1881 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1882 if (ieee80211_is_data(hdr
->frame_control
) &&
1883 is_unicast_ether_addr(hdr
->addr1
)) {
1884 if (mesh_nexthop_resolve(sdata
, skb
))
1885 return; /* skb queued: don't free */
1887 ieee80211_mps_set_frame_flags(sdata
, NULL
, hdr
);
1891 ieee80211_set_qos_hdr(sdata
, skb
);
1892 ieee80211_tx(sdata
, sta
, skb
, false);
1895 static bool ieee80211_parse_tx_radiotap(struct ieee80211_local
*local
,
1896 struct sk_buff
*skb
)
1898 struct ieee80211_radiotap_iterator iterator
;
1899 struct ieee80211_radiotap_header
*rthdr
=
1900 (struct ieee80211_radiotap_header
*) skb
->data
;
1901 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1902 struct ieee80211_supported_band
*sband
=
1903 local
->hw
.wiphy
->bands
[info
->band
];
1904 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
1908 bool rate_found
= false;
1909 u8 rate_retries
= 0;
1911 u8 mcs_known
, mcs_flags
, mcs_bw
;
1913 u8 vht_mcs
= 0, vht_nss
= 0;
1916 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1917 IEEE80211_TX_CTL_DONTFRAG
;
1920 * for every radiotap entry that is present
1921 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1922 * entries present, or -EINVAL on error)
1926 ret
= ieee80211_radiotap_iterator_next(&iterator
);
1931 /* see if this argument is something we can use */
1932 switch (iterator
.this_arg_index
) {
1934 * You must take care when dereferencing iterator.this_arg
1935 * for multibyte types... the pointer is not aligned. Use
1936 * get_unaligned((type *)iterator.this_arg) to dereference
1937 * iterator.this_arg for type "type" safely on all arches.
1939 case IEEE80211_RADIOTAP_FLAGS
:
1940 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
1942 * this indicates that the skb we have been
1943 * handed has the 32-bit FCS CRC at the end...
1944 * we should react to that by snipping it off
1945 * because it will be recomputed and added
1948 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
1951 skb_trim(skb
, skb
->len
- FCS_LEN
);
1953 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
1954 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1955 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
1956 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
1959 case IEEE80211_RADIOTAP_TX_FLAGS
:
1960 txflags
= get_unaligned_le16(iterator
.this_arg
);
1961 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
1962 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1965 case IEEE80211_RADIOTAP_RATE
:
1966 rate
= *iterator
.this_arg
;
1971 case IEEE80211_RADIOTAP_DATA_RETRIES
:
1972 rate_retries
= *iterator
.this_arg
;
1975 case IEEE80211_RADIOTAP_MCS
:
1976 mcs_known
= iterator
.this_arg
[0];
1977 mcs_flags
= iterator
.this_arg
[1];
1978 if (!(mcs_known
& IEEE80211_RADIOTAP_MCS_HAVE_MCS
))
1982 rate
= iterator
.this_arg
[2];
1983 rate_flags
= IEEE80211_TX_RC_MCS
;
1985 if (mcs_known
& IEEE80211_RADIOTAP_MCS_HAVE_GI
&&
1986 mcs_flags
& IEEE80211_RADIOTAP_MCS_SGI
)
1987 rate_flags
|= IEEE80211_TX_RC_SHORT_GI
;
1989 mcs_bw
= mcs_flags
& IEEE80211_RADIOTAP_MCS_BW_MASK
;
1990 if (mcs_known
& IEEE80211_RADIOTAP_MCS_HAVE_BW
&&
1991 mcs_bw
== IEEE80211_RADIOTAP_MCS_BW_40
)
1992 rate_flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
1995 case IEEE80211_RADIOTAP_VHT
:
1996 vht_known
= get_unaligned_le16(iterator
.this_arg
);
1999 rate_flags
= IEEE80211_TX_RC_VHT_MCS
;
2000 if ((vht_known
& IEEE80211_RADIOTAP_VHT_KNOWN_GI
) &&
2001 (iterator
.this_arg
[2] &
2002 IEEE80211_RADIOTAP_VHT_FLAG_SGI
))
2003 rate_flags
|= IEEE80211_TX_RC_SHORT_GI
;
2005 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
) {
2006 if (iterator
.this_arg
[3] == 1)
2008 IEEE80211_TX_RC_40_MHZ_WIDTH
;
2009 else if (iterator
.this_arg
[3] == 4)
2011 IEEE80211_TX_RC_80_MHZ_WIDTH
;
2012 else if (iterator
.this_arg
[3] == 11)
2014 IEEE80211_TX_RC_160_MHZ_WIDTH
;
2017 vht_mcs
= iterator
.this_arg
[4] >> 4;
2018 vht_nss
= iterator
.this_arg
[4] & 0xF;
2022 * Please update the file
2023 * Documentation/networking/mac80211-injection.txt
2024 * when parsing new fields here.
2032 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
2036 info
->control
.flags
|= IEEE80211_TX_CTRL_RATE_INJECT
;
2038 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
2039 info
->control
.rates
[i
].idx
= -1;
2040 info
->control
.rates
[i
].flags
= 0;
2041 info
->control
.rates
[i
].count
= 0;
2044 if (rate_flags
& IEEE80211_TX_RC_MCS
) {
2045 info
->control
.rates
[0].idx
= rate
;
2046 } else if (rate_flags
& IEEE80211_TX_RC_VHT_MCS
) {
2047 ieee80211_rate_set_vht(info
->control
.rates
, vht_mcs
,
2050 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2051 if (rate
* 5 != sband
->bitrates
[i
].bitrate
)
2054 info
->control
.rates
[0].idx
= i
;
2059 if (info
->control
.rates
[0].idx
< 0)
2060 info
->control
.flags
&= ~IEEE80211_TX_CTRL_RATE_INJECT
;
2062 info
->control
.rates
[0].flags
= rate_flags
;
2063 info
->control
.rates
[0].count
= min_t(u8
, rate_retries
+ 1,
2064 local
->hw
.max_rate_tries
);
2068 * remove the radiotap header
2069 * iterator->_max_length was sanity-checked against
2070 * skb->len by iterator init
2072 skb_pull(skb
, iterator
._max_length
);
2077 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
2078 struct net_device
*dev
)
2080 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2081 struct ieee80211_chanctx_conf
*chanctx_conf
;
2082 struct ieee80211_radiotap_header
*prthdr
=
2083 (struct ieee80211_radiotap_header
*)skb
->data
;
2084 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2085 struct ieee80211_hdr
*hdr
;
2086 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
2087 struct cfg80211_chan_def
*chandef
;
2091 /* check for not even having the fixed radiotap header part */
2092 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
2093 goto fail
; /* too short to be possibly valid */
2095 /* is it a header version we can trust to find length from? */
2096 if (unlikely(prthdr
->it_version
))
2097 goto fail
; /* only version 0 is supported */
2099 /* then there must be a radiotap header with a length we can use */
2100 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
2102 /* does the skb contain enough to deliver on the alleged length? */
2103 if (unlikely(skb
->len
< len_rthdr
))
2104 goto fail
; /* skb too short for claimed rt header extent */
2107 * fix up the pointers accounting for the radiotap
2108 * header still being in there. We are being given
2109 * a precooked IEEE80211 header so no need for
2112 skb_set_mac_header(skb
, len_rthdr
);
2114 * these are just fixed to the end of the rt area since we
2115 * don't have any better information and at this point, nobody cares
2117 skb_set_network_header(skb
, len_rthdr
);
2118 skb_set_transport_header(skb
, len_rthdr
);
2120 if (skb
->len
< len_rthdr
+ 2)
2123 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
2124 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
2126 if (skb
->len
< len_rthdr
+ hdrlen
)
2130 * Initialize skb->protocol if the injected frame is a data frame
2131 * carrying a rfc1042 header
2133 if (ieee80211_is_data(hdr
->frame_control
) &&
2134 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
2135 u8
*payload
= (u8
*)hdr
+ hdrlen
;
2137 if (ether_addr_equal(payload
, rfc1042_header
))
2138 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
2142 memset(info
, 0, sizeof(*info
));
2144 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2145 IEEE80211_TX_CTL_INJECTED
;
2150 * We process outgoing injected frames that have a local address
2151 * we handle as though they are non-injected frames.
2152 * This code here isn't entirely correct, the local MAC address
2153 * isn't always enough to find the interface to use; for proper
2154 * VLAN/WDS support we will need a different mechanism (which
2155 * likely isn't going to be monitor interfaces).
2157 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2159 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
2160 if (!ieee80211_sdata_running(tmp_sdata
))
2162 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
2163 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
2164 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
2166 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
2172 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2173 if (!chanctx_conf
) {
2174 tmp_sdata
= rcu_dereference(local
->monitor_sdata
);
2177 rcu_dereference(tmp_sdata
->vif
.chanctx_conf
);
2181 chandef
= &chanctx_conf
->def
;
2182 else if (!local
->use_chanctx
)
2183 chandef
= &local
->_oper_chandef
;
2188 * Frame injection is not allowed if beaconing is not allowed
2189 * or if we need radar detection. Beaconing is usually not allowed when
2190 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2191 * Passive scan is also used in world regulatory domains where
2192 * your country is not known and as such it should be treated as
2193 * NO TX unless the channel is explicitly allowed in which case
2194 * your current regulatory domain would not have the passive scan
2197 * Since AP mode uses monitor interfaces to inject/TX management
2198 * frames we can make AP mode the exception to this rule once it
2199 * supports radar detection as its implementation can deal with
2200 * radar detection by itself. We can do that later by adding a
2201 * monitor flag interfaces used for AP support.
2203 if (!cfg80211_reg_can_beacon(local
->hw
.wiphy
, chandef
,
2207 info
->band
= chandef
->chan
->band
;
2209 /* process and remove the injection radiotap header */
2210 if (!ieee80211_parse_tx_radiotap(local
, skb
))
2213 ieee80211_xmit(sdata
, NULL
, skb
);
2216 return NETDEV_TX_OK
;
2222 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
2225 static inline bool ieee80211_is_tdls_setup(struct sk_buff
*skb
)
2227 u16 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
2229 return ethertype
== ETH_P_TDLS
&&
2231 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
;
2234 static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data
*sdata
,
2235 struct sk_buff
*skb
,
2236 struct sta_info
**sta_out
)
2238 struct sta_info
*sta
;
2240 switch (sdata
->vif
.type
) {
2241 case NL80211_IFTYPE_AP_VLAN
:
2242 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
2246 } else if (sdata
->wdev
.use_4addr
) {
2250 case NL80211_IFTYPE_AP
:
2251 case NL80211_IFTYPE_OCB
:
2252 case NL80211_IFTYPE_ADHOC
:
2253 if (is_multicast_ether_addr(skb
->data
)) {
2254 *sta_out
= ERR_PTR(-ENOENT
);
2257 sta
= sta_info_get_bss(sdata
, skb
->data
);
2259 case NL80211_IFTYPE_WDS
:
2260 sta
= sta_info_get(sdata
, sdata
->u
.wds
.remote_addr
);
2262 #ifdef CONFIG_MAC80211_MESH
2263 case NL80211_IFTYPE_MESH_POINT
:
2264 /* determined much later */
2268 case NL80211_IFTYPE_STATION
:
2269 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
2270 sta
= sta_info_get(sdata
, skb
->data
);
2272 bool tdls_peer
, tdls_auth
;
2274 tdls_peer
= test_sta_flag(sta
,
2275 WLAN_STA_TDLS_PEER
);
2276 tdls_auth
= test_sta_flag(sta
,
2277 WLAN_STA_TDLS_PEER_AUTH
);
2279 if (tdls_peer
&& tdls_auth
) {
2285 * TDLS link during setup - throw out frames to
2286 * peer. Allow TDLS-setup frames to unauthorized
2287 * peers for the special case of a link teardown
2288 * after a TDLS sta is removed due to being
2291 if (tdls_peer
&& !tdls_auth
&&
2292 !ieee80211_is_tdls_setup(skb
))
2298 sta
= sta_info_get(sdata
, sdata
->u
.mgd
.bssid
);
2306 *sta_out
= sta
?: ERR_PTR(-ENOENT
);
2311 * ieee80211_build_hdr - build 802.11 header in the given frame
2312 * @sdata: virtual interface to build the header for
2313 * @skb: the skb to build the header in
2314 * @info_flags: skb flags to set
2316 * This function takes the skb with 802.3 header and reformats the header to
2317 * the appropriate IEEE 802.11 header based on which interface the packet is
2318 * being transmitted on.
2320 * Note that this function also takes care of the TX status request and
2321 * potential unsharing of the SKB - this needs to be interleaved with the
2324 * The function requires the read-side RCU lock held
2326 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2328 static struct sk_buff
*ieee80211_build_hdr(struct ieee80211_sub_if_data
*sdata
,
2329 struct sk_buff
*skb
, u32 info_flags
,
2330 struct sta_info
*sta
)
2332 struct ieee80211_local
*local
= sdata
->local
;
2333 struct ieee80211_tx_info
*info
;
2335 u16 ethertype
, hdrlen
, meshhdrlen
= 0;
2337 struct ieee80211_hdr hdr
;
2338 struct ieee80211s_hdr mesh_hdr __maybe_unused
;
2339 struct mesh_path __maybe_unused
*mppath
= NULL
, *mpath
= NULL
;
2340 const u8
*encaps_data
;
2341 int encaps_len
, skip_header_bytes
;
2343 bool wme_sta
= false, authorized
= false;
2347 struct ieee80211_chanctx_conf
*chanctx_conf
;
2348 struct ieee80211_sub_if_data
*ap_sdata
;
2349 enum nl80211_band band
;
2355 /* convert Ethernet header to proper 802.11 header (based on
2356 * operation mode) */
2357 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
2358 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
2360 switch (sdata
->vif
.type
) {
2361 case NL80211_IFTYPE_AP_VLAN
:
2362 if (sdata
->wdev
.use_4addr
) {
2363 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
2365 memcpy(hdr
.addr1
, sta
->sta
.addr
, ETH_ALEN
);
2366 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2367 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2368 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2370 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2371 wme_sta
= sta
->sta
.wme
;
2373 ap_sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
2375 chanctx_conf
= rcu_dereference(ap_sdata
->vif
.chanctx_conf
);
2376 if (!chanctx_conf
) {
2380 band
= chanctx_conf
->def
.chan
->band
;
2381 if (sdata
->wdev
.use_4addr
)
2384 case NL80211_IFTYPE_AP
:
2385 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
2386 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2387 if (!chanctx_conf
) {
2391 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
2393 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2394 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2395 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2397 band
= chanctx_conf
->def
.chan
->band
;
2399 case NL80211_IFTYPE_WDS
:
2400 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
2402 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
2403 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2404 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2405 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2408 * This is the exception! WDS style interfaces are prohibited
2409 * when channel contexts are in used so this must be valid
2411 band
= local
->hw
.conf
.chandef
.chan
->band
;
2413 #ifdef CONFIG_MAC80211_MESH
2414 case NL80211_IFTYPE_MESH_POINT
:
2415 if (!is_multicast_ether_addr(skb
->data
)) {
2416 struct sta_info
*next_hop
;
2417 bool mpp_lookup
= true;
2419 mpath
= mesh_path_lookup(sdata
, skb
->data
);
2422 next_hop
= rcu_dereference(mpath
->next_hop
);
2424 !(mpath
->flags
& (MESH_PATH_ACTIVE
|
2425 MESH_PATH_RESOLVING
)))
2430 mppath
= mpp_path_lookup(sdata
, skb
->data
);
2432 mppath
->exp_time
= jiffies
;
2435 if (mppath
&& mpath
)
2436 mesh_path_del(sdata
, mpath
->dst
);
2440 * Use address extension if it is a packet from
2441 * another interface or if we know the destination
2442 * is being proxied by a portal (i.e. portal address
2443 * differs from proxied address)
2445 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
2446 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
2447 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
2448 skb
->data
, skb
->data
+ ETH_ALEN
);
2449 meshhdrlen
= ieee80211_new_mesh_header(sdata
, &mesh_hdr
,
2452 /* DS -> MBSS (802.11-2012 13.11.3.3).
2453 * For unicast with unknown forwarding information,
2454 * destination might be in the MBSS or if that fails
2455 * forwarded to another mesh gate. In either case
2456 * resolution will be handled in ieee80211_xmit(), so
2457 * leave the original DA. This also works for mcast */
2458 const u8
*mesh_da
= skb
->data
;
2461 mesh_da
= mppath
->mpp
;
2463 mesh_da
= mpath
->dst
;
2465 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
2466 mesh_da
, sdata
->vif
.addr
);
2467 if (is_multicast_ether_addr(mesh_da
))
2468 /* DA TA mSA AE:SA */
2469 meshhdrlen
= ieee80211_new_mesh_header(
2471 skb
->data
+ ETH_ALEN
, NULL
);
2473 /* RA TA mDA mSA AE:DA SA */
2474 meshhdrlen
= ieee80211_new_mesh_header(
2475 sdata
, &mesh_hdr
, skb
->data
,
2476 skb
->data
+ ETH_ALEN
);
2479 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2480 if (!chanctx_conf
) {
2484 band
= chanctx_conf
->def
.chan
->band
;
2487 case NL80211_IFTYPE_STATION
:
2488 /* we already did checks when looking up the RA STA */
2489 tdls_peer
= test_sta_flag(sta
, WLAN_STA_TDLS_PEER
);
2493 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2494 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2495 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2497 } else if (sdata
->u
.mgd
.use_4addr
&&
2498 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
2499 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2500 IEEE80211_FCTL_TODS
);
2502 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2503 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2504 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2505 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2508 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
2510 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2511 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2512 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2515 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2516 if (!chanctx_conf
) {
2520 band
= chanctx_conf
->def
.chan
->band
;
2522 case NL80211_IFTYPE_OCB
:
2524 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2525 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2526 eth_broadcast_addr(hdr
.addr3
);
2528 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2529 if (!chanctx_conf
) {
2533 band
= chanctx_conf
->def
.chan
->band
;
2535 case NL80211_IFTYPE_ADHOC
:
2537 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2538 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2539 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
2541 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2542 if (!chanctx_conf
) {
2546 band
= chanctx_conf
->def
.chan
->band
;
2553 multicast
= is_multicast_ether_addr(hdr
.addr1
);
2555 /* sta is always NULL for mesh */
2557 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2558 wme_sta
= sta
->sta
.wme
;
2559 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2560 /* For mesh, the use of the QoS header is mandatory */
2564 /* receiver does QoS (which also means we do) use it */
2566 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2571 * Drop unicast frames to unauthorised stations unless they are
2572 * EAPOL frames from the local station.
2574 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2575 (sdata
->vif
.type
!= NL80211_IFTYPE_OCB
) &&
2576 !multicast
&& !authorized
&&
2577 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
2578 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
2579 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2580 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2581 sdata
->name
, hdr
.addr1
);
2584 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
2590 if (unlikely(!multicast
&& skb
->sk
&&
2591 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
2592 struct sk_buff
*ack_skb
= skb_clone_sk(skb
);
2595 unsigned long flags
;
2598 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
2599 id
= idr_alloc(&local
->ack_status_frames
, ack_skb
,
2600 1, 0x10000, GFP_ATOMIC
);
2601 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2605 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2613 * If the skb is shared we need to obtain our own copy.
2615 if (skb_shared(skb
)) {
2616 struct sk_buff
*tmp_skb
= skb
;
2618 /* can't happen -- skb is a clone if info_id != 0 */
2621 skb
= skb_clone(skb
, GFP_ATOMIC
);
2630 hdr
.frame_control
= fc
;
2631 hdr
.duration_id
= 0;
2634 skip_header_bytes
= ETH_HLEN
;
2635 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2636 encaps_data
= bridge_tunnel_header
;
2637 encaps_len
= sizeof(bridge_tunnel_header
);
2638 skip_header_bytes
-= 2;
2639 } else if (ethertype
>= ETH_P_802_3_MIN
) {
2640 encaps_data
= rfc1042_header
;
2641 encaps_len
= sizeof(rfc1042_header
);
2642 skip_header_bytes
-= 2;
2648 nh_pos
= skb_network_header(skb
) - skb
->data
;
2649 h_pos
= skb_transport_header(skb
) - skb
->data
;
2651 skb_pull(skb
, skip_header_bytes
);
2652 nh_pos
-= skip_header_bytes
;
2653 h_pos
-= skip_header_bytes
;
2655 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2658 * So we need to modify the skb header and hence need a copy of
2659 * that. The head_need variable above doesn't, so far, include
2660 * the needed header space that we don't need right away. If we
2661 * can, then we don't reallocate right now but only after the
2662 * frame arrives at the master device (if it does...)
2664 * If we cannot, however, then we will reallocate to include all
2665 * the ever needed space. Also, if we need to reallocate it anyway,
2666 * make it big enough for everything we may ever need.
2669 if (head_need
> 0 || skb_cloned(skb
)) {
2670 head_need
+= sdata
->encrypt_headroom
;
2671 head_need
+= local
->tx_headroom
;
2672 head_need
= max_t(int, 0, head_need
);
2673 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true)) {
2674 ieee80211_free_txskb(&local
->hw
, skb
);
2676 return ERR_PTR(-ENOMEM
);
2681 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2682 nh_pos
+= encaps_len
;
2683 h_pos
+= encaps_len
;
2686 #ifdef CONFIG_MAC80211_MESH
2687 if (meshhdrlen
> 0) {
2688 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2689 nh_pos
+= meshhdrlen
;
2690 h_pos
+= meshhdrlen
;
2694 if (ieee80211_is_data_qos(fc
)) {
2695 __le16
*qos_control
;
2697 qos_control
= (__le16
*) skb_push(skb
, 2);
2698 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2700 * Maybe we could actually set some fields here, for now just
2701 * initialise to zero to indicate no special operation.
2705 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2710 /* Update skb pointers to various headers since this modified frame
2711 * is going to go through Linux networking code that may potentially
2712 * need things like pointer to IP header. */
2713 skb_reset_mac_header(skb
);
2714 skb_set_network_header(skb
, nh_pos
);
2715 skb_set_transport_header(skb
, h_pos
);
2717 info
= IEEE80211_SKB_CB(skb
);
2718 memset(info
, 0, sizeof(*info
));
2720 info
->flags
= info_flags
;
2721 info
->ack_frame_id
= info_id
;
2727 return ERR_PTR(ret
);
2731 * fast-xmit overview
2733 * The core idea of this fast-xmit is to remove per-packet checks by checking
2734 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2735 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2736 * much less work can be done per packet. For example, fragmentation must be
2737 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2740 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2741 * header and other data to aid packet processing in ieee80211_xmit_fast().
2743 * The most difficult part of this is that when any of these assumptions
2744 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2745 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2746 * since the per-packet code no longer checks the conditions. This is reflected
2747 * by the calls to these functions throughout the rest of the code, and must be
2748 * maintained if any of the TX path checks change.
2751 void ieee80211_check_fast_xmit(struct sta_info
*sta
)
2753 struct ieee80211_fast_tx build
= {}, *fast_tx
= NULL
, *old
;
2754 struct ieee80211_local
*local
= sta
->local
;
2755 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
2756 struct ieee80211_hdr
*hdr
= (void *)build
.hdr
;
2757 struct ieee80211_chanctx_conf
*chanctx_conf
;
2760 if (!ieee80211_hw_check(&local
->hw
, SUPPORT_FAST_XMIT
))
2763 /* Locking here protects both the pointer itself, and against concurrent
2764 * invocations winning data access races to, e.g., the key pointer that
2766 * Without it, the invocation of this function right after the key
2767 * pointer changes wouldn't be sufficient, as another CPU could access
2768 * the pointer, then stall, and then do the cache update after the CPU
2769 * that invalidated the key.
2770 * With the locking, such scenarios cannot happen as the check for the
2771 * key and the fast-tx assignment are done atomically, so the CPU that
2772 * modifies the key will either wait or other one will see the key
2773 * cleared/changed already.
2775 spin_lock_bh(&sta
->lock
);
2776 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
) &&
2777 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
) &&
2778 sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2781 if (!test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
2784 if (test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
2785 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
2786 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
) ||
2787 test_sta_flag(sta
, WLAN_STA_CLEAR_PS_FILT
))
2790 if (sdata
->noack_map
)
2793 /* fast-xmit doesn't handle fragmentation at all */
2794 if (local
->hw
.wiphy
->frag_threshold
!= (u32
)-1 &&
2795 !local
->ops
->set_frag_threshold
)
2799 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2800 if (!chanctx_conf
) {
2804 build
.band
= chanctx_conf
->def
.chan
->band
;
2807 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
2809 switch (sdata
->vif
.type
) {
2810 case NL80211_IFTYPE_ADHOC
:
2812 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
2813 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
2814 memcpy(hdr
->addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
2817 case NL80211_IFTYPE_STATION
:
2818 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER
)) {
2820 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
2821 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
2822 memcpy(hdr
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2827 if (sdata
->u
.mgd
.use_4addr
) {
2828 /* non-regular ethertype cannot use the fastpath */
2829 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2830 IEEE80211_FCTL_TODS
);
2832 memcpy(hdr
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2833 memcpy(hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2834 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2835 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
2839 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
2841 memcpy(hdr
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2842 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2843 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
2846 case NL80211_IFTYPE_AP_VLAN
:
2847 if (sdata
->wdev
.use_4addr
) {
2848 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2849 IEEE80211_FCTL_TODS
);
2851 memcpy(hdr
->addr1
, sta
->sta
.addr
, ETH_ALEN
);
2852 memcpy(hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2853 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2854 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
2859 case NL80211_IFTYPE_AP
:
2860 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
2862 build
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
2863 memcpy(hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2864 build
.sa_offs
= offsetof(struct ieee80211_hdr
, addr3
);
2868 /* not handled on fast-xmit */
2874 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2877 /* We store the key here so there's no point in using rcu_dereference()
2878 * but that's fine because the code that changes the pointers will call
2879 * this function after doing so. For a single CPU that would be enough,
2880 * for multiple see the comment above.
2882 build
.key
= rcu_access_pointer(sta
->ptk
[sta
->ptk_idx
]);
2884 build
.key
= rcu_access_pointer(sdata
->default_unicast_key
);
2886 bool gen_iv
, iv_spc
, mmic
;
2888 gen_iv
= build
.key
->conf
.flags
& IEEE80211_KEY_FLAG_GENERATE_IV
;
2889 iv_spc
= build
.key
->conf
.flags
& IEEE80211_KEY_FLAG_PUT_IV_SPACE
;
2890 mmic
= build
.key
->conf
.flags
& IEEE80211_KEY_FLAG_GENERATE_MMIC
;
2892 /* don't handle software crypto */
2893 if (!(build
.key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
2896 switch (build
.key
->conf
.cipher
) {
2897 case WLAN_CIPHER_SUITE_CCMP
:
2898 case WLAN_CIPHER_SUITE_CCMP_256
:
2899 /* add fixed key ID */
2901 (build
.hdr
+ build
.hdr_len
)[3] =
2902 0x20 | (build
.key
->conf
.keyidx
<< 6);
2903 build
.pn_offs
= build
.hdr_len
;
2905 if (gen_iv
|| iv_spc
)
2906 build
.hdr_len
+= IEEE80211_CCMP_HDR_LEN
;
2908 case WLAN_CIPHER_SUITE_GCMP
:
2909 case WLAN_CIPHER_SUITE_GCMP_256
:
2910 /* add fixed key ID */
2912 (build
.hdr
+ build
.hdr_len
)[3] =
2913 0x20 | (build
.key
->conf
.keyidx
<< 6);
2914 build
.pn_offs
= build
.hdr_len
;
2916 if (gen_iv
|| iv_spc
)
2917 build
.hdr_len
+= IEEE80211_GCMP_HDR_LEN
;
2919 case WLAN_CIPHER_SUITE_TKIP
:
2920 /* cannot handle MMIC or IV generation in xmit-fast */
2924 build
.hdr_len
+= IEEE80211_TKIP_IV_LEN
;
2926 case WLAN_CIPHER_SUITE_WEP40
:
2927 case WLAN_CIPHER_SUITE_WEP104
:
2928 /* cannot handle IV generation in fast-xmit */
2932 build
.hdr_len
+= IEEE80211_WEP_IV_LEN
;
2934 case WLAN_CIPHER_SUITE_AES_CMAC
:
2935 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
2936 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
2937 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
2939 "management cipher suite 0x%x enabled for data\n",
2940 build
.key
->conf
.cipher
);
2943 /* we don't know how to generate IVs for this at all */
2944 if (WARN_ON(gen_iv
))
2946 /* pure hardware keys are OK, of course */
2947 if (!(build
.key
->flags
& KEY_FLAG_CIPHER_SCHEME
))
2949 /* cipher scheme might require space allocation */
2951 build
.key
->conf
.iv_len
> IEEE80211_FAST_XMIT_MAX_IV
)
2954 build
.hdr_len
+= build
.key
->conf
.iv_len
;
2957 fc
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
2960 hdr
->frame_control
= fc
;
2962 memcpy(build
.hdr
+ build
.hdr_len
,
2963 rfc1042_header
, sizeof(rfc1042_header
));
2964 build
.hdr_len
+= sizeof(rfc1042_header
);
2966 fast_tx
= kmemdup(&build
, sizeof(build
), GFP_ATOMIC
);
2967 /* if the kmemdup fails, continue w/o fast_tx */
2972 /* we might have raced against another call to this function */
2973 old
= rcu_dereference_protected(sta
->fast_tx
,
2974 lockdep_is_held(&sta
->lock
));
2975 rcu_assign_pointer(sta
->fast_tx
, fast_tx
);
2977 kfree_rcu(old
, rcu_head
);
2978 spin_unlock_bh(&sta
->lock
);
2981 void ieee80211_check_fast_xmit_all(struct ieee80211_local
*local
)
2983 struct sta_info
*sta
;
2986 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
)
2987 ieee80211_check_fast_xmit(sta
);
2991 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data
*sdata
)
2993 struct ieee80211_local
*local
= sdata
->local
;
2994 struct sta_info
*sta
;
2998 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
2999 if (sdata
!= sta
->sdata
&&
3000 (!sta
->sdata
->bss
|| sta
->sdata
->bss
!= sdata
->bss
))
3002 ieee80211_check_fast_xmit(sta
);
3008 void ieee80211_clear_fast_xmit(struct sta_info
*sta
)
3010 struct ieee80211_fast_tx
*fast_tx
;
3012 spin_lock_bh(&sta
->lock
);
3013 fast_tx
= rcu_dereference_protected(sta
->fast_tx
,
3014 lockdep_is_held(&sta
->lock
));
3015 RCU_INIT_POINTER(sta
->fast_tx
, NULL
);
3016 spin_unlock_bh(&sta
->lock
);
3019 kfree_rcu(fast_tx
, rcu_head
);
3022 static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local
*local
,
3023 struct sk_buff
*skb
, int headroom
,
3026 int amsdu_len
= *subframe_len
+ sizeof(struct ethhdr
);
3027 int padding
= (4 - amsdu_len
) & 3;
3029 if (skb_headroom(skb
) < headroom
|| skb_tailroom(skb
) < padding
) {
3030 I802_DEBUG_INC(local
->tx_expand_skb_head
);
3032 if (pskb_expand_head(skb
, headroom
, padding
, GFP_ATOMIC
)) {
3033 wiphy_debug(local
->hw
.wiphy
,
3034 "failed to reallocate TX buffer\n");
3040 *subframe_len
+= padding
;
3041 memset(skb_put(skb
, padding
), 0, padding
);
3047 static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data
*sdata
,
3048 struct ieee80211_fast_tx
*fast_tx
,
3049 struct sk_buff
*skb
)
3051 struct ieee80211_local
*local
= sdata
->local
;
3052 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3053 struct ieee80211_hdr
*hdr
;
3054 struct ethhdr amsdu_hdr
;
3055 int hdr_len
= fast_tx
->hdr_len
- sizeof(rfc1042_header
);
3056 int subframe_len
= skb
->len
- hdr_len
;
3060 if (info
->flags
& IEEE80211_TX_CTL_RATE_CTRL_PROBE
)
3063 if (info
->control
.flags
& IEEE80211_TX_CTRL_AMSDU
)
3066 if (!ieee80211_amsdu_realloc_pad(local
, skb
, sizeof(amsdu_hdr
),
3070 amsdu_hdr
.h_proto
= cpu_to_be16(subframe_len
);
3071 memcpy(amsdu_hdr
.h_source
, skb
->data
+ fast_tx
->sa_offs
, ETH_ALEN
);
3072 memcpy(amsdu_hdr
.h_dest
, skb
->data
+ fast_tx
->da_offs
, ETH_ALEN
);
3074 data
= skb_push(skb
, sizeof(amsdu_hdr
));
3075 memmove(data
, data
+ sizeof(amsdu_hdr
), hdr_len
);
3076 memcpy(data
+ hdr_len
, &amsdu_hdr
, sizeof(amsdu_hdr
));
3079 qc
= ieee80211_get_qos_ctl(hdr
);
3080 *qc
|= IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
3082 info
->control
.flags
|= IEEE80211_TX_CTRL_AMSDU
;
3087 static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data
*sdata
,
3088 struct sta_info
*sta
,
3089 struct ieee80211_fast_tx
*fast_tx
,
3090 struct sk_buff
*skb
)
3092 struct ieee80211_local
*local
= sdata
->local
;
3093 struct fq
*fq
= &local
->fq
;
3095 struct fq_flow
*flow
;
3096 u8 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
3097 struct ieee80211_txq
*txq
= sta
->sta
.txq
[tid
];
3098 struct txq_info
*txqi
;
3099 struct sk_buff
**frag_tail
, *head
;
3100 int subframe_len
= skb
->len
- ETH_ALEN
;
3101 u8 max_subframes
= sta
->sta
.max_amsdu_subframes
;
3102 int max_frags
= local
->hw
.max_tx_fragments
;
3103 int max_amsdu_len
= sta
->sta
.max_amsdu_len
;
3107 unsigned int orig_len
;
3110 if (!ieee80211_hw_check(&local
->hw
, TX_AMSDU
))
3116 txqi
= to_txq_info(txq
);
3117 if (test_bit(IEEE80211_TXQ_NO_AMSDU
, &txqi
->flags
))
3120 if (sta
->sta
.max_rc_amsdu_len
)
3121 max_amsdu_len
= min_t(int, max_amsdu_len
,
3122 sta
->sta
.max_rc_amsdu_len
);
3124 spin_lock_bh(&fq
->lock
);
3126 /* TODO: Ideally aggregation should be done on dequeue to remain
3127 * responsive to environment changes.
3131 flow
= fq_flow_classify(fq
, tin
, skb
, fq_flow_get_default_func
);
3132 head
= skb_peek_tail(&flow
->queue
);
3136 orig_len
= head
->len
;
3138 if (skb
->len
+ head
->len
> max_amsdu_len
)
3141 if (!ieee80211_amsdu_prepare_head(sdata
, fast_tx
, head
))
3144 nfrags
= 1 + skb_shinfo(skb
)->nr_frags
;
3145 nfrags
+= 1 + skb_shinfo(head
)->nr_frags
;
3146 frag_tail
= &skb_shinfo(head
)->frag_list
;
3147 while (*frag_tail
) {
3148 nfrags
+= 1 + skb_shinfo(*frag_tail
)->nr_frags
;
3149 frag_tail
= &(*frag_tail
)->next
;
3153 if (max_subframes
&& n
> max_subframes
)
3156 if (max_frags
&& nfrags
> max_frags
)
3159 if (!ieee80211_amsdu_realloc_pad(local
, skb
, sizeof(rfc1042_header
) + 2,
3164 data
= skb_push(skb
, ETH_ALEN
+ 2);
3165 memmove(data
, data
+ ETH_ALEN
+ 2, 2 * ETH_ALEN
);
3167 data
+= 2 * ETH_ALEN
;
3168 len
= cpu_to_be16(subframe_len
);
3169 memcpy(data
, &len
, 2);
3170 memcpy(data
+ 2, rfc1042_header
, sizeof(rfc1042_header
));
3172 head
->len
+= skb
->len
;
3173 head
->data_len
+= skb
->len
;
3176 flow
->backlog
+= head
->len
- orig_len
;
3177 tin
->backlog_bytes
+= head
->len
- orig_len
;
3179 fq_recalc_backlog(fq
, tin
, flow
);
3182 spin_unlock_bh(&fq
->lock
);
3187 static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data
*sdata
,
3188 struct net_device
*dev
, struct sta_info
*sta
,
3189 struct ieee80211_fast_tx
*fast_tx
,
3190 struct sk_buff
*skb
)
3192 struct ieee80211_local
*local
= sdata
->local
;
3193 u16 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
3194 int extra_head
= fast_tx
->hdr_len
- (ETH_HLEN
- 2);
3195 int hw_headroom
= sdata
->local
->hw
.extra_tx_headroom
;
3197 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3198 struct ieee80211_hdr
*hdr
= (void *)fast_tx
->hdr
;
3199 struct ieee80211_tx_data tx
;
3200 ieee80211_tx_result r
;
3201 struct tid_ampdu_tx
*tid_tx
= NULL
;
3202 u8 tid
= IEEE80211_NUM_TIDS
;
3204 /* control port protocol needs a lot of special handling */
3205 if (cpu_to_be16(ethertype
) == sdata
->control_port_protocol
)
3208 /* only RFC 1042 SNAP */
3209 if (ethertype
< ETH_P_802_3_MIN
)
3212 /* don't handle TX status request here either */
3213 if (skb
->sk
&& skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)
3216 if (hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) {
3217 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
3218 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[tid
]);
3220 if (!test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
))
3222 if (tid_tx
->timeout
)
3223 tid_tx
->last_tx
= jiffies
;
3227 /* after this point (skb is modified) we cannot return false */
3229 if (skb_shared(skb
)) {
3230 struct sk_buff
*tmp_skb
= skb
;
3232 skb
= skb_clone(skb
, GFP_ATOMIC
);
3239 ieee80211_tx_stats(dev
, skb
->len
+ extra_head
);
3241 if ((hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) &&
3242 ieee80211_amsdu_aggregate(sdata
, sta
, fast_tx
, skb
))
3245 /* will not be crypto-handled beyond what we do here, so use false
3246 * as the may-encrypt argument for the resize to not account for
3247 * more room than we already have in 'extra_head'
3249 if (unlikely(ieee80211_skb_resize(sdata
, skb
,
3250 max_t(int, extra_head
+ hw_headroom
-
3251 skb_headroom(skb
), 0),
3257 memcpy(ð
, skb
->data
, ETH_HLEN
- 2);
3258 hdr
= (void *)skb_push(skb
, extra_head
);
3259 memcpy(skb
->data
, fast_tx
->hdr
, fast_tx
->hdr_len
);
3260 memcpy(skb
->data
+ fast_tx
->da_offs
, eth
.h_dest
, ETH_ALEN
);
3261 memcpy(skb
->data
+ fast_tx
->sa_offs
, eth
.h_source
, ETH_ALEN
);
3263 memset(info
, 0, sizeof(*info
));
3264 info
->band
= fast_tx
->band
;
3265 info
->control
.vif
= &sdata
->vif
;
3266 info
->flags
= IEEE80211_TX_CTL_FIRST_FRAGMENT
|
3267 IEEE80211_TX_CTL_DONTFRAG
|
3268 (tid_tx
? IEEE80211_TX_CTL_AMPDU
: 0);
3270 if (hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_QOS_DATA
)) {
3271 *ieee80211_get_qos_ctl(hdr
) = tid
;
3272 if (!ieee80211_get_txq(local
, &sdata
->vif
, &sta
->sta
, skb
))
3273 hdr
->seq_ctrl
= ieee80211_tx_next_seq(sta
, tid
);
3275 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
3276 hdr
->seq_ctrl
= cpu_to_le16(sdata
->sequence_number
);
3277 sdata
->sequence_number
+= 0x10;
3280 if (skb_shinfo(skb
)->gso_size
)
3281 sta
->tx_stats
.msdu
[tid
] +=
3282 DIV_ROUND_UP(skb
->len
, skb_shinfo(skb
)->gso_size
);
3284 sta
->tx_stats
.msdu
[tid
]++;
3286 info
->hw_queue
= sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
3288 __skb_queue_head_init(&tx
.skbs
);
3290 tx
.flags
= IEEE80211_TX_UNICAST
;
3294 tx
.key
= fast_tx
->key
;
3297 info
->control
.hw_key
= &fast_tx
->key
->conf
;
3299 if (!ieee80211_hw_check(&local
->hw
, HAS_RATE_CONTROL
)) {
3301 r
= ieee80211_tx_h_rate_ctrl(&tx
);
3305 if (r
!= TX_CONTINUE
) {
3312 /* statistics normally done by ieee80211_tx_h_stats (but that
3313 * has to consider fragmentation, so is more complex)
3315 sta
->tx_stats
.bytes
[skb_get_queue_mapping(skb
)] += skb
->len
;
3316 sta
->tx_stats
.packets
[skb_get_queue_mapping(skb
)]++;
3318 if (fast_tx
->pn_offs
) {
3320 u8
*crypto_hdr
= skb
->data
+ fast_tx
->pn_offs
;
3322 switch (fast_tx
->key
->conf
.cipher
) {
3323 case WLAN_CIPHER_SUITE_CCMP
:
3324 case WLAN_CIPHER_SUITE_CCMP_256
:
3325 case WLAN_CIPHER_SUITE_GCMP
:
3326 case WLAN_CIPHER_SUITE_GCMP_256
:
3327 pn
= atomic64_inc_return(&fast_tx
->key
->conf
.tx_pn
);
3329 crypto_hdr
[1] = pn
>> 8;
3330 crypto_hdr
[4] = pn
>> 16;
3331 crypto_hdr
[5] = pn
>> 24;
3332 crypto_hdr
[6] = pn
>> 32;
3333 crypto_hdr
[7] = pn
>> 40;
3338 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
3339 sdata
= container_of(sdata
->bss
,
3340 struct ieee80211_sub_if_data
, u
.ap
);
3342 __skb_queue_tail(&tx
.skbs
, skb
);
3343 ieee80211_tx_frags(local
, &sdata
->vif
, &sta
->sta
, &tx
.skbs
, false);
3347 void __ieee80211_subif_start_xmit(struct sk_buff
*skb
,
3348 struct net_device
*dev
,
3351 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3352 struct sta_info
*sta
;
3353 struct sk_buff
*next
;
3355 if (unlikely(skb
->len
< ETH_HLEN
)) {
3362 if (ieee80211_lookup_ra_sta(sdata
, skb
, &sta
))
3365 if (!IS_ERR_OR_NULL(sta
)) {
3366 struct ieee80211_fast_tx
*fast_tx
;
3368 fast_tx
= rcu_dereference(sta
->fast_tx
);
3371 ieee80211_xmit_fast(sdata
, dev
, sta
, fast_tx
, skb
))
3375 if (skb_is_gso(skb
)) {
3376 struct sk_buff
*segs
;
3378 segs
= skb_gso_segment(skb
, 0);
3386 /* we cannot process non-linear frames on this path */
3387 if (skb_linearize(skb
)) {
3392 /* the frame could be fragmented, software-encrypted, and other
3393 * things so we cannot really handle checksum offload with it -
3394 * fix it up in software before we handle anything else.
3396 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
3397 skb_set_transport_header(skb
,
3398 skb_checksum_start_offset(skb
));
3399 if (skb_checksum_help(skb
))
3412 skb
= ieee80211_build_hdr(sdata
, skb
, info_flags
, sta
);
3416 ieee80211_tx_stats(dev
, skb
->len
);
3418 ieee80211_xmit(sdata
, sta
, skb
);
3428 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3429 * @skb: packet to be sent
3430 * @dev: incoming interface
3432 * On failure skb will be freed.
3434 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
3435 struct net_device
*dev
)
3437 __ieee80211_subif_start_xmit(skb
, dev
, 0);
3438 return NETDEV_TX_OK
;
3442 ieee80211_build_data_template(struct ieee80211_sub_if_data
*sdata
,
3443 struct sk_buff
*skb
, u32 info_flags
)
3445 struct ieee80211_hdr
*hdr
;
3446 struct ieee80211_tx_data tx
= {
3447 .local
= sdata
->local
,
3450 struct sta_info
*sta
;
3454 if (ieee80211_lookup_ra_sta(sdata
, skb
, &sta
)) {
3456 skb
= ERR_PTR(-EINVAL
);
3460 skb
= ieee80211_build_hdr(sdata
, skb
, info_flags
, sta
);
3464 hdr
= (void *)skb
->data
;
3465 tx
.sta
= sta_info_get(sdata
, hdr
->addr1
);
3468 if (ieee80211_tx_h_select_key(&tx
) != TX_CONTINUE
) {
3471 return ERR_PTR(-EINVAL
);
3480 * ieee80211_clear_tx_pending may not be called in a context where
3481 * it is possible that it packets could come in again.
3483 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
3485 struct sk_buff
*skb
;
3488 for (i
= 0; i
< local
->hw
.queues
; i
++) {
3489 while ((skb
= skb_dequeue(&local
->pending
[i
])) != NULL
)
3490 ieee80211_free_txskb(&local
->hw
, skb
);
3495 * Returns false if the frame couldn't be transmitted but was queued instead,
3496 * which in this case means re-queued -- take as an indication to stop sending
3497 * more pending frames.
3499 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
3500 struct sk_buff
*skb
)
3502 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3503 struct ieee80211_sub_if_data
*sdata
;
3504 struct sta_info
*sta
;
3505 struct ieee80211_hdr
*hdr
;
3507 struct ieee80211_chanctx_conf
*chanctx_conf
;
3509 sdata
= vif_to_sdata(info
->control
.vif
);
3511 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
3512 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3513 if (unlikely(!chanctx_conf
)) {
3517 info
->band
= chanctx_conf
->def
.chan
->band
;
3518 result
= ieee80211_tx(sdata
, NULL
, skb
, true);
3520 struct sk_buff_head skbs
;
3522 __skb_queue_head_init(&skbs
);
3523 __skb_queue_tail(&skbs
, skb
);
3525 hdr
= (struct ieee80211_hdr
*)skb
->data
;
3526 sta
= sta_info_get(sdata
, hdr
->addr1
);
3528 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
3535 * Transmit all pending packets. Called from tasklet.
3537 void ieee80211_tx_pending(unsigned long data
)
3539 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
3540 unsigned long flags
;
3546 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
3547 for (i
= 0; i
< local
->hw
.queues
; i
++) {
3549 * If queue is stopped by something other than due to pending
3550 * frames, or we have no pending frames, proceed to next queue.
3552 if (local
->queue_stop_reasons
[i
] ||
3553 skb_queue_empty(&local
->pending
[i
]))
3556 while (!skb_queue_empty(&local
->pending
[i
])) {
3557 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
3558 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
3560 if (WARN_ON(!info
->control
.vif
)) {
3561 ieee80211_free_txskb(&local
->hw
, skb
);
3565 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
3568 txok
= ieee80211_tx_pending_skb(local
, skb
);
3569 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
3575 if (skb_queue_empty(&local
->pending
[i
]))
3576 ieee80211_propagate_queue_wake(local
, i
);
3578 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
3583 /* functions for drivers to get certain frames */
3585 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
3586 struct ps_data
*ps
, struct sk_buff
*skb
,
3591 int i
, have_bits
= 0, n1
, n2
;
3593 /* Generate bitmap for TIM only if there are any STAs in power save
3595 if (atomic_read(&ps
->num_sta_ps
) > 0)
3596 /* in the hope that this is faster than
3597 * checking byte-for-byte */
3598 have_bits
= !bitmap_empty((unsigned long *)ps
->tim
,
3599 IEEE80211_MAX_AID
+1);
3601 if (ps
->dtim_count
== 0)
3602 ps
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
3607 tim
= pos
= (u8
*) skb_put(skb
, 6);
3608 *pos
++ = WLAN_EID_TIM
;
3610 *pos
++ = ps
->dtim_count
;
3611 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
3613 if (ps
->dtim_count
== 0 && !skb_queue_empty(&ps
->bc_buf
))
3616 ps
->dtim_bc_mc
= aid0
== 1;
3619 /* Find largest even number N1 so that bits numbered 1 through
3620 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3621 * (N2 + 1) x 8 through 2007 are 0. */
3623 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
3630 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
3637 /* Bitmap control */
3639 /* Part Virt Bitmap */
3640 skb_put(skb
, n2
- n1
);
3641 memcpy(pos
, ps
->tim
+ n1
, n2
- n1
+ 1);
3643 tim
[1] = n2
- n1
+ 4;
3645 *pos
++ = aid0
; /* Bitmap control */
3646 *pos
++ = 0; /* Part Virt Bitmap */
3650 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
3651 struct ps_data
*ps
, struct sk_buff
*skb
,
3654 struct ieee80211_local
*local
= sdata
->local
;
3657 * Not very nice, but we want to allow the driver to call
3658 * ieee80211_beacon_get() as a response to the set_tim()
3659 * callback. That, however, is already invoked under the
3660 * sta_lock to guarantee consistent and race-free update
3661 * of the tim bitmap in mac80211 and the driver.
3663 if (local
->tim_in_locked_section
) {
3664 __ieee80211_beacon_add_tim(sdata
, ps
, skb
, is_template
);
3666 spin_lock_bh(&local
->tim_lock
);
3667 __ieee80211_beacon_add_tim(sdata
, ps
, skb
, is_template
);
3668 spin_unlock_bh(&local
->tim_lock
);
3674 static void ieee80211_set_csa(struct ieee80211_sub_if_data
*sdata
,
3675 struct beacon_data
*beacon
)
3677 struct probe_resp
*resp
;
3679 size_t beacon_data_len
;
3681 u8 count
= beacon
->csa_current_counter
;
3683 switch (sdata
->vif
.type
) {
3684 case NL80211_IFTYPE_AP
:
3685 beacon_data
= beacon
->tail
;
3686 beacon_data_len
= beacon
->tail_len
;
3688 case NL80211_IFTYPE_ADHOC
:
3689 beacon_data
= beacon
->head
;
3690 beacon_data_len
= beacon
->head_len
;
3692 case NL80211_IFTYPE_MESH_POINT
:
3693 beacon_data
= beacon
->head
;
3694 beacon_data_len
= beacon
->head_len
;
3701 for (i
= 0; i
< IEEE80211_MAX_CSA_COUNTERS_NUM
; ++i
) {
3702 resp
= rcu_dereference(sdata
->u
.ap
.probe_resp
);
3704 if (beacon
->csa_counter_offsets
[i
]) {
3705 if (WARN_ON_ONCE(beacon
->csa_counter_offsets
[i
] >=
3711 beacon_data
[beacon
->csa_counter_offsets
[i
]] = count
;
3714 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
&& resp
)
3715 resp
->data
[resp
->csa_counter_offsets
[i
]] = count
;
3720 static u8
__ieee80211_csa_update_counter(struct beacon_data
*beacon
)
3722 beacon
->csa_current_counter
--;
3724 /* the counter should never reach 0 */
3725 WARN_ON_ONCE(!beacon
->csa_current_counter
);
3727 return beacon
->csa_current_counter
;
3730 u8
ieee80211_csa_update_counter(struct ieee80211_vif
*vif
)
3732 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3733 struct beacon_data
*beacon
= NULL
;
3738 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
3739 beacon
= rcu_dereference(sdata
->u
.ap
.beacon
);
3740 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
3741 beacon
= rcu_dereference(sdata
->u
.ibss
.presp
);
3742 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
3743 beacon
= rcu_dereference(sdata
->u
.mesh
.beacon
);
3748 count
= __ieee80211_csa_update_counter(beacon
);
3754 EXPORT_SYMBOL(ieee80211_csa_update_counter
);
3756 bool ieee80211_csa_is_complete(struct ieee80211_vif
*vif
)
3758 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3759 struct beacon_data
*beacon
= NULL
;
3761 size_t beacon_data_len
;
3764 if (!ieee80211_sdata_running(sdata
))
3768 if (vif
->type
== NL80211_IFTYPE_AP
) {
3769 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
3771 beacon
= rcu_dereference(ap
->beacon
);
3772 if (WARN_ON(!beacon
|| !beacon
->tail
))
3774 beacon_data
= beacon
->tail
;
3775 beacon_data_len
= beacon
->tail_len
;
3776 } else if (vif
->type
== NL80211_IFTYPE_ADHOC
) {
3777 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
3779 beacon
= rcu_dereference(ifibss
->presp
);
3783 beacon_data
= beacon
->head
;
3784 beacon_data_len
= beacon
->head_len
;
3785 } else if (vif
->type
== NL80211_IFTYPE_MESH_POINT
) {
3786 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
3788 beacon
= rcu_dereference(ifmsh
->beacon
);
3792 beacon_data
= beacon
->head
;
3793 beacon_data_len
= beacon
->head_len
;
3799 if (!beacon
->csa_counter_offsets
[0])
3802 if (WARN_ON_ONCE(beacon
->csa_counter_offsets
[0] > beacon_data_len
))
3805 if (beacon_data
[beacon
->csa_counter_offsets
[0]] == 1)
3812 EXPORT_SYMBOL(ieee80211_csa_is_complete
);
3814 static struct sk_buff
*
3815 __ieee80211_beacon_get(struct ieee80211_hw
*hw
,
3816 struct ieee80211_vif
*vif
,
3817 struct ieee80211_mutable_offsets
*offs
,
3820 struct ieee80211_local
*local
= hw_to_local(hw
);
3821 struct beacon_data
*beacon
= NULL
;
3822 struct sk_buff
*skb
= NULL
;
3823 struct ieee80211_tx_info
*info
;
3824 struct ieee80211_sub_if_data
*sdata
= NULL
;
3825 enum nl80211_band band
;
3826 struct ieee80211_tx_rate_control txrc
;
3827 struct ieee80211_chanctx_conf
*chanctx_conf
;
3828 int csa_off_base
= 0;
3832 sdata
= vif_to_sdata(vif
);
3833 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3835 if (!ieee80211_sdata_running(sdata
) || !chanctx_conf
)
3839 memset(offs
, 0, sizeof(*offs
));
3841 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
3842 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
3844 beacon
= rcu_dereference(ap
->beacon
);
3846 if (beacon
->csa_counter_offsets
[0]) {
3848 __ieee80211_csa_update_counter(beacon
);
3850 ieee80211_set_csa(sdata
, beacon
);
3854 * headroom, head length,
3855 * tail length and maximum TIM length
3857 skb
= dev_alloc_skb(local
->tx_headroom
+
3859 beacon
->tail_len
+ 256 +
3860 local
->hw
.extra_beacon_tailroom
);
3864 skb_reserve(skb
, local
->tx_headroom
);
3865 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
3868 ieee80211_beacon_add_tim(sdata
, &ap
->ps
, skb
,
3872 offs
->tim_offset
= beacon
->head_len
;
3873 offs
->tim_length
= skb
->len
- beacon
->head_len
;
3875 /* for AP the csa offsets are from tail */
3876 csa_off_base
= skb
->len
;
3880 memcpy(skb_put(skb
, beacon
->tail_len
),
3881 beacon
->tail
, beacon
->tail_len
);
3884 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
3885 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
3886 struct ieee80211_hdr
*hdr
;
3888 beacon
= rcu_dereference(ifibss
->presp
);
3892 if (beacon
->csa_counter_offsets
[0]) {
3894 __ieee80211_csa_update_counter(beacon
);
3896 ieee80211_set_csa(sdata
, beacon
);
3899 skb
= dev_alloc_skb(local
->tx_headroom
+ beacon
->head_len
+
3900 local
->hw
.extra_beacon_tailroom
);
3903 skb_reserve(skb
, local
->tx_headroom
);
3904 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
3907 hdr
= (struct ieee80211_hdr
*) skb
->data
;
3908 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
3909 IEEE80211_STYPE_BEACON
);
3910 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
3911 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
3913 beacon
= rcu_dereference(ifmsh
->beacon
);
3917 if (beacon
->csa_counter_offsets
[0]) {
3919 /* TODO: For mesh csa_counter is in TU, so
3920 * decrementing it by one isn't correct, but
3921 * for now we leave it consistent with overall
3922 * mac80211's behavior.
3924 __ieee80211_csa_update_counter(beacon
);
3926 ieee80211_set_csa(sdata
, beacon
);
3929 if (ifmsh
->sync_ops
)
3930 ifmsh
->sync_ops
->adjust_tbtt(sdata
, beacon
);
3932 skb
= dev_alloc_skb(local
->tx_headroom
+
3936 local
->hw
.extra_beacon_tailroom
);
3939 skb_reserve(skb
, local
->tx_headroom
);
3940 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
3942 ieee80211_beacon_add_tim(sdata
, &ifmsh
->ps
, skb
, is_template
);
3945 offs
->tim_offset
= beacon
->head_len
;
3946 offs
->tim_length
= skb
->len
- beacon
->head_len
;
3949 memcpy(skb_put(skb
, beacon
->tail_len
), beacon
->tail
,
3957 if (offs
&& beacon
) {
3960 for (i
= 0; i
< IEEE80211_MAX_CSA_COUNTERS_NUM
; i
++) {
3961 u16 csa_off
= beacon
->csa_counter_offsets
[i
];
3966 offs
->csa_counter_offs
[i
] = csa_off_base
+ csa_off
;
3970 band
= chanctx_conf
->def
.chan
->band
;
3972 info
= IEEE80211_SKB_CB(skb
);
3974 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
3975 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
3978 memset(&txrc
, 0, sizeof(txrc
));
3980 txrc
.sband
= local
->hw
.wiphy
->bands
[band
];
3981 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
3983 txrc
.reported_rate
.idx
= -1;
3984 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
3985 if (txrc
.rate_idx_mask
== (1 << txrc
.sband
->n_bitrates
) - 1)
3986 txrc
.max_rate_idx
= -1;
3988 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
3990 rate_control_get_rate(sdata
, NULL
, &txrc
);
3992 info
->control
.vif
= vif
;
3994 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
3995 IEEE80211_TX_CTL_ASSIGN_SEQ
|
3996 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
4004 ieee80211_beacon_get_template(struct ieee80211_hw
*hw
,
4005 struct ieee80211_vif
*vif
,
4006 struct ieee80211_mutable_offsets
*offs
)
4008 return __ieee80211_beacon_get(hw
, vif
, offs
, true);
4010 EXPORT_SYMBOL(ieee80211_beacon_get_template
);
4012 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
4013 struct ieee80211_vif
*vif
,
4014 u16
*tim_offset
, u16
*tim_length
)
4016 struct ieee80211_mutable_offsets offs
= {};
4017 struct sk_buff
*bcn
= __ieee80211_beacon_get(hw
, vif
, &offs
, false);
4018 struct sk_buff
*copy
;
4019 struct ieee80211_supported_band
*sband
;
4026 *tim_offset
= offs
.tim_offset
;
4029 *tim_length
= offs
.tim_length
;
4031 if (ieee80211_hw_check(hw
, BEACON_TX_STATUS
) ||
4032 !hw_to_local(hw
)->monitors
)
4035 /* send a copy to monitor interfaces */
4036 copy
= skb_copy(bcn
, GFP_ATOMIC
);
4040 shift
= ieee80211_vif_get_shift(vif
);
4041 sband
= hw
->wiphy
->bands
[ieee80211_get_sdata_band(vif_to_sdata(vif
))];
4042 ieee80211_tx_monitor(hw_to_local(hw
), copy
, sband
, 1, shift
, false);
4046 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
4048 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
4049 struct ieee80211_vif
*vif
)
4051 struct ieee80211_if_ap
*ap
= NULL
;
4052 struct sk_buff
*skb
= NULL
;
4053 struct probe_resp
*presp
= NULL
;
4054 struct ieee80211_hdr
*hdr
;
4055 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4057 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
4063 presp
= rcu_dereference(ap
->probe_resp
);
4067 skb
= dev_alloc_skb(presp
->len
);
4071 memcpy(skb_put(skb
, presp
->len
), presp
->data
, presp
->len
);
4073 hdr
= (struct ieee80211_hdr
*) skb
->data
;
4074 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
4080 EXPORT_SYMBOL(ieee80211_proberesp_get
);
4082 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
4083 struct ieee80211_vif
*vif
)
4085 struct ieee80211_sub_if_data
*sdata
;
4086 struct ieee80211_if_managed
*ifmgd
;
4087 struct ieee80211_pspoll
*pspoll
;
4088 struct ieee80211_local
*local
;
4089 struct sk_buff
*skb
;
4091 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
4094 sdata
= vif_to_sdata(vif
);
4095 ifmgd
= &sdata
->u
.mgd
;
4096 local
= sdata
->local
;
4098 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
4102 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
4104 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
4105 memset(pspoll
, 0, sizeof(*pspoll
));
4106 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
4107 IEEE80211_STYPE_PSPOLL
);
4108 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
4110 /* aid in PS-Poll has its two MSBs each set to 1 */
4111 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
4113 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
4114 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
4118 EXPORT_SYMBOL(ieee80211_pspoll_get
);
4120 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
4121 struct ieee80211_vif
*vif
)
4123 struct ieee80211_hdr_3addr
*nullfunc
;
4124 struct ieee80211_sub_if_data
*sdata
;
4125 struct ieee80211_if_managed
*ifmgd
;
4126 struct ieee80211_local
*local
;
4127 struct sk_buff
*skb
;
4129 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
4132 sdata
= vif_to_sdata(vif
);
4133 ifmgd
= &sdata
->u
.mgd
;
4134 local
= sdata
->local
;
4136 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*nullfunc
));
4140 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
4142 nullfunc
= (struct ieee80211_hdr_3addr
*) skb_put(skb
,
4144 memset(nullfunc
, 0, sizeof(*nullfunc
));
4145 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
4146 IEEE80211_STYPE_NULLFUNC
|
4147 IEEE80211_FCTL_TODS
);
4148 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
4149 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
4150 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
4154 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
4156 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
4158 const u8
*ssid
, size_t ssid_len
,
4161 struct ieee80211_local
*local
= hw_to_local(hw
);
4162 struct ieee80211_hdr_3addr
*hdr
;
4163 struct sk_buff
*skb
;
4167 ie_ssid_len
= 2 + ssid_len
;
4169 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
4170 ie_ssid_len
+ tailroom
);
4174 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
4176 hdr
= (struct ieee80211_hdr_3addr
*) skb_put(skb
, sizeof(*hdr
));
4177 memset(hdr
, 0, sizeof(*hdr
));
4178 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
4179 IEEE80211_STYPE_PROBE_REQ
);
4180 eth_broadcast_addr(hdr
->addr1
);
4181 memcpy(hdr
->addr2
, src_addr
, ETH_ALEN
);
4182 eth_broadcast_addr(hdr
->addr3
);
4184 pos
= skb_put(skb
, ie_ssid_len
);
4185 *pos
++ = WLAN_EID_SSID
;
4188 memcpy(pos
, ssid
, ssid_len
);
4193 EXPORT_SYMBOL(ieee80211_probereq_get
);
4195 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
4196 const void *frame
, size_t frame_len
,
4197 const struct ieee80211_tx_info
*frame_txctl
,
4198 struct ieee80211_rts
*rts
)
4200 const struct ieee80211_hdr
*hdr
= frame
;
4202 rts
->frame_control
=
4203 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
4204 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
4206 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
4207 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
4209 EXPORT_SYMBOL(ieee80211_rts_get
);
4211 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
4212 const void *frame
, size_t frame_len
,
4213 const struct ieee80211_tx_info
*frame_txctl
,
4214 struct ieee80211_cts
*cts
)
4216 const struct ieee80211_hdr
*hdr
= frame
;
4218 cts
->frame_control
=
4219 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
4220 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
4221 frame_len
, frame_txctl
);
4222 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
4224 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
4227 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
4228 struct ieee80211_vif
*vif
)
4230 struct ieee80211_local
*local
= hw_to_local(hw
);
4231 struct sk_buff
*skb
= NULL
;
4232 struct ieee80211_tx_data tx
;
4233 struct ieee80211_sub_if_data
*sdata
;
4235 struct ieee80211_tx_info
*info
;
4236 struct ieee80211_chanctx_conf
*chanctx_conf
;
4238 sdata
= vif_to_sdata(vif
);
4241 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4246 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
4247 struct beacon_data
*beacon
=
4248 rcu_dereference(sdata
->u
.ap
.beacon
);
4250 if (!beacon
|| !beacon
->head
)
4253 ps
= &sdata
->u
.ap
.ps
;
4254 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
4255 ps
= &sdata
->u
.mesh
.ps
;
4260 if (ps
->dtim_count
!= 0 || !ps
->dtim_bc_mc
)
4261 goto out
; /* send buffered bc/mc only after DTIM beacon */
4264 skb
= skb_dequeue(&ps
->bc_buf
);
4267 local
->total_ps_buffered
--;
4269 if (!skb_queue_empty(&ps
->bc_buf
) && skb
->len
>= 2) {
4270 struct ieee80211_hdr
*hdr
=
4271 (struct ieee80211_hdr
*) skb
->data
;
4272 /* more buffered multicast/broadcast frames ==> set
4273 * MoreData flag in IEEE 802.11 header to inform PS
4275 hdr
->frame_control
|=
4276 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
4279 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
4280 sdata
= IEEE80211_DEV_TO_SUB_IF(skb
->dev
);
4281 if (!ieee80211_tx_prepare(sdata
, &tx
, NULL
, skb
))
4283 ieee80211_free_txskb(hw
, skb
);
4286 info
= IEEE80211_SKB_CB(skb
);
4288 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
4289 info
->band
= chanctx_conf
->def
.chan
->band
;
4291 if (invoke_tx_handlers(&tx
))
4298 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
4300 int ieee80211_reserve_tid(struct ieee80211_sta
*pubsta
, u8 tid
)
4302 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
4303 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
4304 struct ieee80211_local
*local
= sdata
->local
;
4308 lockdep_assert_held(&local
->sta_mtx
);
4310 /* only some cases are supported right now */
4311 switch (sdata
->vif
.type
) {
4312 case NL80211_IFTYPE_STATION
:
4313 case NL80211_IFTYPE_AP
:
4314 case NL80211_IFTYPE_AP_VLAN
:
4321 if (WARN_ON(tid
>= IEEE80211_NUM_UPS
))
4324 if (sta
->reserved_tid
== tid
) {
4329 if (sta
->reserved_tid
!= IEEE80211_TID_UNRESERVED
) {
4330 sdata_err(sdata
, "TID reservation already active\n");
4335 ieee80211_stop_vif_queues(sdata
->local
, sdata
,
4336 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID
);
4340 /* Tear down BA sessions so we stop aggregating on this TID */
4341 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
)) {
4342 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
4343 __ieee80211_stop_tx_ba_session(sta
, tid
,
4344 AGG_STOP_LOCAL_REQUEST
);
4347 queues
= BIT(sdata
->vif
.hw_queue
[ieee802_1d_to_ac
[tid
]]);
4348 __ieee80211_flush_queues(local
, sdata
, queues
, false);
4350 sta
->reserved_tid
= tid
;
4352 ieee80211_wake_vif_queues(local
, sdata
,
4353 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID
);
4355 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
))
4356 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
4362 EXPORT_SYMBOL(ieee80211_reserve_tid
);
4364 void ieee80211_unreserve_tid(struct ieee80211_sta
*pubsta
, u8 tid
)
4366 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
4367 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
4369 lockdep_assert_held(&sdata
->local
->sta_mtx
);
4371 /* only some cases are supported right now */
4372 switch (sdata
->vif
.type
) {
4373 case NL80211_IFTYPE_STATION
:
4374 case NL80211_IFTYPE_AP
:
4375 case NL80211_IFTYPE_AP_VLAN
:
4382 if (tid
!= sta
->reserved_tid
) {
4383 sdata_err(sdata
, "TID to unreserve (%d) isn't reserved\n", tid
);
4387 sta
->reserved_tid
= IEEE80211_TID_UNRESERVED
;
4389 EXPORT_SYMBOL(ieee80211_unreserve_tid
);
4391 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data
*sdata
,
4392 struct sk_buff
*skb
, int tid
,
4393 enum nl80211_band band
)
4395 int ac
= ieee802_1d_to_ac
[tid
& 7];
4397 skb_reset_mac_header(skb
);
4398 skb_reset_network_header(skb
);
4399 skb_reset_transport_header(skb
);
4401 skb_set_queue_mapping(skb
, ac
);
4402 skb
->priority
= tid
;
4404 skb
->dev
= sdata
->dev
;
4407 * The other path calling ieee80211_xmit is from the tasklet,
4408 * and while we can handle concurrent transmissions locking
4409 * requirements are that we do not come into tx with bhs on.
4412 IEEE80211_SKB_CB(skb
)->band
= band
;
4413 ieee80211_xmit(sdata
, NULL
, skb
);