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>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 * Transmit and frame generation functions.
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/bitmap.h>
20 #include <linux/rcupdate.h>
21 #include <linux/export.h>
22 #include <net/net_namespace.h>
23 #include <net/ieee80211_radiotap.h>
24 #include <net/cfg80211.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
39 static __le16
ieee80211_duration(struct ieee80211_tx_data
*tx
,
40 struct sk_buff
*skb
, int group_addr
,
43 int rate
, mrate
, erp
, dur
, i
;
44 struct ieee80211_rate
*txrate
;
45 struct ieee80211_local
*local
= tx
->local
;
46 struct ieee80211_supported_band
*sband
;
47 struct ieee80211_hdr
*hdr
;
48 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
50 /* assume HW handles this */
51 if (info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
)
55 if (WARN_ON_ONCE(info
->control
.rates
[0].idx
< 0))
58 sband
= local
->hw
.wiphy
->bands
[info
->band
];
59 txrate
= &sband
->bitrates
[info
->control
.rates
[0].idx
];
61 erp
= txrate
->flags
& IEEE80211_RATE_ERP_G
;
64 * data and mgmt (except PS Poll):
66 * - during contention period:
67 * if addr1 is group address: 0
68 * if more fragments = 0 and addr1 is individual address: time to
69 * transmit one ACK plus SIFS
70 * if more fragments = 1 and addr1 is individual address: time to
71 * transmit next fragment plus 2 x ACK plus 3 x SIFS
74 * - control response frame (CTS or ACK) shall be transmitted using the
75 * same rate as the immediately previous frame in the frame exchange
76 * sequence, if this rate belongs to the PHY mandatory rates, or else
77 * at the highest possible rate belonging to the PHY rates in the
80 hdr
= (struct ieee80211_hdr
*)skb
->data
;
81 if (ieee80211_is_ctl(hdr
->frame_control
)) {
82 /* TODO: These control frames are not currently sent by
83 * mac80211, but should they be implemented, this function
84 * needs to be updated to support duration field calculation.
86 * RTS: time needed to transmit pending data/mgmt frame plus
87 * one CTS frame plus one ACK frame plus 3 x SIFS
88 * CTS: duration of immediately previous RTS minus time
89 * required to transmit CTS and its SIFS
90 * ACK: 0 if immediately previous directed data/mgmt had
91 * more=0, with more=1 duration in ACK frame is duration
92 * from previous frame minus time needed to transmit ACK
94 * PS Poll: BIT(15) | BIT(14) | aid
100 if (0 /* FIX: data/mgmt during CFP */)
101 return cpu_to_le16(32768);
103 if (group_addr
) /* Group address as the destination - no ACK */
106 /* Individual destination address:
107 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
108 * CTS and ACK frames shall be transmitted using the highest rate in
109 * basic rate set that is less than or equal to the rate of the
110 * immediately previous frame and that is using the same modulation
111 * (CCK or OFDM). If no basic rate set matches with these requirements,
112 * the highest mandatory rate of the PHY that is less than or equal to
113 * the rate of the previous frame is used.
114 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
117 /* use lowest available if everything fails */
118 mrate
= sband
->bitrates
[0].bitrate
;
119 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
120 struct ieee80211_rate
*r
= &sband
->bitrates
[i
];
122 if (r
->bitrate
> txrate
->bitrate
)
125 if (tx
->sdata
->vif
.bss_conf
.basic_rates
& BIT(i
))
128 switch (sband
->band
) {
129 case IEEE80211_BAND_2GHZ
: {
131 if (tx
->sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
132 flag
= IEEE80211_RATE_MANDATORY_G
;
134 flag
= IEEE80211_RATE_MANDATORY_B
;
139 case IEEE80211_BAND_5GHZ
:
140 if (r
->flags
& IEEE80211_RATE_MANDATORY_A
)
143 case IEEE80211_BAND_60GHZ
:
144 /* TODO, for now fall through */
145 case IEEE80211_NUM_BANDS
:
151 /* No matching basic rate found; use highest suitable mandatory
156 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
157 if (ieee80211_is_data_qos(hdr
->frame_control
) &&
158 *(ieee80211_get_qos_ctl(hdr
)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK
)
161 /* Time needed to transmit ACK
162 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
163 * to closest integer */
164 dur
= ieee80211_frame_duration(sband
->band
, 10, rate
, erp
,
165 tx
->sdata
->vif
.bss_conf
.use_short_preamble
);
168 /* Frame is fragmented: duration increases with time needed to
169 * transmit next fragment plus ACK and 2 x SIFS. */
170 dur
*= 2; /* ACK + SIFS */
172 dur
+= ieee80211_frame_duration(sband
->band
, next_frag_len
,
173 txrate
->bitrate
, erp
,
174 tx
->sdata
->vif
.bss_conf
.use_short_preamble
);
177 return cpu_to_le16(dur
);
181 static ieee80211_tx_result debug_noinline
182 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data
*tx
)
184 struct ieee80211_local
*local
= tx
->local
;
185 struct ieee80211_if_managed
*ifmgd
;
187 /* driver doesn't support power save */
188 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
))
191 /* hardware does dynamic power save */
192 if (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)
195 /* dynamic power save disabled */
196 if (local
->hw
.conf
.dynamic_ps_timeout
<= 0)
199 /* we are scanning, don't enable power save */
203 if (!local
->ps_sdata
)
206 /* No point if we're going to suspend */
207 if (local
->quiescing
)
210 /* dynamic ps is supported only in managed mode */
211 if (tx
->sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
214 ifmgd
= &tx
->sdata
->u
.mgd
;
217 * Don't wakeup from power save if u-apsd is enabled, voip ac has
218 * u-apsd enabled and the frame is in voip class. This effectively
219 * means that even if all access categories have u-apsd enabled, in
220 * practise u-apsd is only used with the voip ac. This is a
221 * workaround for the case when received voip class packets do not
222 * have correct qos tag for some reason, due the network or the
225 * Note: ifmgd->uapsd_queues access is racy here. If the value is
226 * changed via debugfs, user needs to reassociate manually to have
227 * everything in sync.
229 if ((ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
) &&
230 (ifmgd
->uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
) &&
231 skb_get_queue_mapping(tx
->skb
) == IEEE80211_AC_VO
)
234 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
235 ieee80211_stop_queues_by_reason(&local
->hw
,
236 IEEE80211_QUEUE_STOP_REASON_PS
);
237 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
238 ieee80211_queue_work(&local
->hw
,
239 &local
->dynamic_ps_disable_work
);
242 /* Don't restart the timer if we're not disassociated */
243 if (!ifmgd
->associated
)
246 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
247 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
252 static ieee80211_tx_result debug_noinline
253 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data
*tx
)
256 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
257 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
260 if (unlikely(info
->flags
& IEEE80211_TX_CTL_INJECTED
))
263 if (unlikely(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
)) &&
264 test_bit(SDATA_STATE_OFFCHANNEL
, &tx
->sdata
->state
) &&
265 !ieee80211_is_probe_req(hdr
->frame_control
) &&
266 !ieee80211_is_nullfunc(hdr
->frame_control
))
268 * When software scanning only nullfunc frames (to notify
269 * the sleep state to the AP) and probe requests (for the
270 * active scan) are allowed, all other frames should not be
271 * sent and we should not get here, but if we do
272 * nonetheless, drop them to avoid sending them
273 * off-channel. See the link below and
274 * ieee80211_start_scan() for more.
276 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
280 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
283 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
286 if (tx
->flags
& IEEE80211_TX_PS_BUFFERED
)
290 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
292 if (likely(tx
->flags
& IEEE80211_TX_UNICAST
)) {
293 if (unlikely(!assoc
&&
294 ieee80211_is_data(hdr
->frame_control
))) {
295 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
296 sdata_info(tx
->sdata
,
297 "dropped data frame to not associated station %pM\n",
300 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
303 } else if (unlikely(tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
304 ieee80211_is_data(hdr
->frame_control
) &&
305 !atomic_read(&tx
->sdata
->u
.ap
.num_mcast_sta
))) {
307 * No associated STAs - no need to send multicast
316 /* This function is called whenever the AP is about to exceed the maximum limit
317 * of buffered frames for power saving STAs. This situation should not really
318 * happen often during normal operation, so dropping the oldest buffered packet
319 * from each queue should be OK to make some room for new frames. */
320 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
322 int total
= 0, purged
= 0;
324 struct ieee80211_sub_if_data
*sdata
;
325 struct sta_info
*sta
;
327 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
330 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
331 ps
= &sdata
->u
.ap
.ps
;
332 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
333 ps
= &sdata
->u
.mesh
.ps
;
337 skb
= skb_dequeue(&ps
->bc_buf
);
342 total
+= skb_queue_len(&ps
->bc_buf
);
346 * Drop one frame from each station from the lowest-priority
347 * AC that has frames at all.
349 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
352 for (ac
= IEEE80211_AC_BK
; ac
>= IEEE80211_AC_VO
; ac
--) {
353 skb
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
354 total
+= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
357 ieee80211_free_txskb(&local
->hw
, skb
);
363 local
->total_ps_buffered
= total
;
364 ps_dbg_hw(&local
->hw
, "PS buffers full - purged %d frames\n", purged
);
367 static ieee80211_tx_result
368 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data
*tx
)
370 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
371 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
375 * broadcast/multicast frame
377 * If any of the associated/peer stations is in power save mode,
378 * the frame is buffered to be sent after DTIM beacon frame.
379 * This is done either by the hardware or us.
382 /* powersaving STAs currently only in AP/VLAN/mesh mode */
383 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
384 tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
388 ps
= &tx
->sdata
->bss
->ps
;
389 } else if (ieee80211_vif_is_mesh(&tx
->sdata
->vif
)) {
390 ps
= &tx
->sdata
->u
.mesh
.ps
;
396 /* no buffering for ordered frames */
397 if (ieee80211_has_order(hdr
->frame_control
))
400 /* no stations in PS mode */
401 if (!atomic_read(&ps
->num_sta_ps
))
404 info
->flags
|= IEEE80211_TX_CTL_SEND_AFTER_DTIM
;
405 if (tx
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
406 info
->hw_queue
= tx
->sdata
->vif
.cab_queue
;
408 /* device releases frame after DTIM beacon */
409 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
))
412 /* buffered in mac80211 */
413 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
414 purge_old_ps_buffers(tx
->local
);
416 if (skb_queue_len(&ps
->bc_buf
) >= AP_MAX_BC_BUFFER
) {
418 "BC TX buffer full - dropping the oldest frame\n");
419 dev_kfree_skb(skb_dequeue(&ps
->bc_buf
));
421 tx
->local
->total_ps_buffered
++;
423 skb_queue_tail(&ps
->bc_buf
, tx
->skb
);
428 static int ieee80211_use_mfp(__le16 fc
, struct sta_info
*sta
,
431 if (!ieee80211_is_mgmt(fc
))
434 if (sta
== NULL
|| !test_sta_flag(sta
, WLAN_STA_MFP
))
437 if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr
*)
444 static ieee80211_tx_result
445 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data
*tx
)
447 struct sta_info
*sta
= tx
->sta
;
448 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
449 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
450 struct ieee80211_local
*local
= tx
->local
;
455 if (unlikely((test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
456 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) &&
457 !(info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
))) {
458 int ac
= skb_get_queue_mapping(tx
->skb
);
460 /* only deauth, disassoc and action are bufferable MMPDUs */
461 if (ieee80211_is_mgmt(hdr
->frame_control
) &&
462 !ieee80211_is_deauth(hdr
->frame_control
) &&
463 !ieee80211_is_disassoc(hdr
->frame_control
) &&
464 !ieee80211_is_action(hdr
->frame_control
)) {
465 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
469 ps_dbg(sta
->sdata
, "STA %pM aid %d: PS buffer for AC %d\n",
470 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
471 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
472 purge_old_ps_buffers(tx
->local
);
473 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
474 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
476 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
478 ieee80211_free_txskb(&local
->hw
, old
);
480 tx
->local
->total_ps_buffered
++;
482 info
->control
.jiffies
= jiffies
;
483 info
->control
.vif
= &tx
->sdata
->vif
;
484 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
485 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
487 if (!timer_pending(&local
->sta_cleanup
))
488 mod_timer(&local
->sta_cleanup
,
489 round_jiffies(jiffies
+
490 STA_INFO_CLEANUP_INTERVAL
));
493 * We queued up some frames, so the TIM bit might
494 * need to be set, recalculate it.
496 sta_info_recalc_tim(sta
);
499 } else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
501 "STA %pM in PS mode, but polling/in SP -> send frame\n",
508 static ieee80211_tx_result debug_noinline
509 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
511 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
514 if (tx
->flags
& IEEE80211_TX_UNICAST
)
515 return ieee80211_tx_h_unicast_ps_buf(tx
);
517 return ieee80211_tx_h_multicast_ps_buf(tx
);
520 static ieee80211_tx_result debug_noinline
521 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
523 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
525 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
&&
526 tx
->sdata
->control_port_no_encrypt
))
527 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
532 static ieee80211_tx_result debug_noinline
533 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
535 struct ieee80211_key
*key
;
536 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
537 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
539 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
))
541 else if (tx
->sta
&& (key
= rcu_dereference(tx
->sta
->ptk
)))
543 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
544 is_multicast_ether_addr(hdr
->addr1
) &&
545 ieee80211_is_robust_mgmt_frame(hdr
) &&
546 (key
= rcu_dereference(tx
->sdata
->default_mgmt_key
)))
548 else if (is_multicast_ether_addr(hdr
->addr1
) &&
549 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
551 else if (!is_multicast_ether_addr(hdr
->addr1
) &&
552 (key
= rcu_dereference(tx
->sdata
->default_unicast_key
)))
554 else if (info
->flags
& IEEE80211_TX_CTL_INJECTED
)
556 else if (!tx
->sdata
->drop_unencrypted
)
558 else if (tx
->skb
->protocol
== tx
->sdata
->control_port_protocol
)
560 else if (ieee80211_is_robust_mgmt_frame(hdr
) &&
561 !(ieee80211_is_action(hdr
->frame_control
) &&
562 tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_MFP
)))
564 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
565 !ieee80211_is_robust_mgmt_frame(hdr
))
568 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_unencrypted
);
573 bool skip_hw
= false;
575 tx
->key
->tx_rx_count
++;
576 /* TODO: add threshold stuff again */
578 switch (tx
->key
->conf
.cipher
) {
579 case WLAN_CIPHER_SUITE_WEP40
:
580 case WLAN_CIPHER_SUITE_WEP104
:
581 case WLAN_CIPHER_SUITE_TKIP
:
582 if (!ieee80211_is_data_present(hdr
->frame_control
))
585 case WLAN_CIPHER_SUITE_CCMP
:
586 if (!ieee80211_is_data_present(hdr
->frame_control
) &&
587 !ieee80211_use_mfp(hdr
->frame_control
, tx
->sta
,
591 skip_hw
= (tx
->key
->conf
.flags
&
592 IEEE80211_KEY_FLAG_SW_MGMT_TX
) &&
593 ieee80211_is_mgmt(hdr
->frame_control
);
595 case WLAN_CIPHER_SUITE_AES_CMAC
:
596 if (!ieee80211_is_mgmt(hdr
->frame_control
))
601 if (unlikely(tx
->key
&& tx
->key
->flags
& KEY_FLAG_TAINTED
&&
602 !ieee80211_is_deauth(hdr
->frame_control
)))
605 if (!skip_hw
&& tx
->key
&&
606 tx
->key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
)
607 info
->control
.hw_key
= &tx
->key
->conf
;
613 static ieee80211_tx_result debug_noinline
614 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data
*tx
)
616 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
617 struct ieee80211_hdr
*hdr
= (void *)tx
->skb
->data
;
618 struct ieee80211_supported_band
*sband
;
619 struct ieee80211_rate
*rate
;
622 bool inval
= false, rts
= false, short_preamble
= false;
623 struct ieee80211_tx_rate_control txrc
;
626 memset(&txrc
, 0, sizeof(txrc
));
628 sband
= tx
->local
->hw
.wiphy
->bands
[info
->band
];
630 len
= min_t(u32
, tx
->skb
->len
+ FCS_LEN
,
631 tx
->local
->hw
.wiphy
->frag_threshold
);
633 /* set up the tx rate control struct we give the RC algo */
634 txrc
.hw
= &tx
->local
->hw
;
636 txrc
.bss_conf
= &tx
->sdata
->vif
.bss_conf
;
638 txrc
.reported_rate
.idx
= -1;
639 txrc
.rate_idx_mask
= tx
->sdata
->rc_rateidx_mask
[info
->band
];
640 if (txrc
.rate_idx_mask
== (1 << sband
->n_bitrates
) - 1)
641 txrc
.max_rate_idx
= -1;
643 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
644 memcpy(txrc
.rate_idx_mcs_mask
,
645 tx
->sdata
->rc_rateidx_mcs_mask
[info
->band
],
646 sizeof(txrc
.rate_idx_mcs_mask
));
647 txrc
.bss
= (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
648 tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
||
649 tx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
);
651 /* set up RTS protection if desired */
652 if (len
> tx
->local
->hw
.wiphy
->rts_threshold
) {
653 txrc
.rts
= rts
= true;
657 * Use short preamble if the BSS can handle it, but not for
658 * management frames unless we know the receiver can handle
659 * that -- the management frame might be to a station that
660 * just wants a probe response.
662 if (tx
->sdata
->vif
.bss_conf
.use_short_preamble
&&
663 (ieee80211_is_data(hdr
->frame_control
) ||
664 (tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_SHORT_PREAMBLE
))))
665 txrc
.short_preamble
= short_preamble
= true;
668 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
671 * Lets not bother rate control if we're associated and cannot
672 * talk to the sta. This should not happen.
674 if (WARN(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
) && assoc
&&
675 !rate_usable_index_exists(sband
, &tx
->sta
->sta
),
676 "%s: Dropped data frame as no usable bitrate found while "
677 "scanning and associated. Target station: "
678 "%pM on %d GHz band\n",
679 tx
->sdata
->name
, hdr
->addr1
,
684 * If we're associated with the sta at this point we know we can at
685 * least send the frame at the lowest bit rate.
687 rate_control_get_rate(tx
->sdata
, tx
->sta
, &txrc
);
689 if (unlikely(info
->control
.rates
[0].idx
< 0))
692 if (txrc
.reported_rate
.idx
< 0) {
693 txrc
.reported_rate
= info
->control
.rates
[0];
694 if (tx
->sta
&& ieee80211_is_data(hdr
->frame_control
))
695 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
697 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
699 if (unlikely(!info
->control
.rates
[0].count
))
700 info
->control
.rates
[0].count
= 1;
702 if (WARN_ON_ONCE((info
->control
.rates
[0].count
> 1) &&
703 (info
->flags
& IEEE80211_TX_CTL_NO_ACK
)))
704 info
->control
.rates
[0].count
= 1;
706 if (is_multicast_ether_addr(hdr
->addr1
)) {
708 * XXX: verify the rate is in the basic rateset
714 * set up the RTS/CTS rate as the fastest basic rate
715 * that is not faster than the data rate
717 * XXX: Should this check all retry rates?
719 if (!(info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
)) {
722 rate
= &sband
->bitrates
[info
->control
.rates
[0].idx
];
724 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
725 /* must be a basic rate */
726 if (!(tx
->sdata
->vif
.bss_conf
.basic_rates
& BIT(i
)))
728 /* must not be faster than the data rate */
729 if (sband
->bitrates
[i
].bitrate
> rate
->bitrate
)
732 if (sband
->bitrates
[baserate
].bitrate
<
733 sband
->bitrates
[i
].bitrate
)
737 info
->control
.rts_cts_rate_idx
= baserate
;
740 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
742 * make sure there's no valid rate following
743 * an invalid one, just in case drivers don't
744 * take the API seriously to stop at -1.
747 info
->control
.rates
[i
].idx
= -1;
750 if (info
->control
.rates
[i
].idx
< 0) {
756 * For now assume MCS is already set up correctly, this
759 if (info
->control
.rates
[i
].flags
& IEEE80211_TX_RC_MCS
) {
760 WARN_ON(info
->control
.rates
[i
].idx
> 76);
764 /* set up RTS protection if desired */
766 info
->control
.rates
[i
].flags
|=
767 IEEE80211_TX_RC_USE_RTS_CTS
;
770 if (WARN_ON_ONCE(info
->control
.rates
[i
].idx
>=
771 sband
->n_bitrates
)) {
772 info
->control
.rates
[i
].idx
= -1;
776 rate
= &sband
->bitrates
[info
->control
.rates
[i
].idx
];
778 /* set up short preamble */
779 if (short_preamble
&&
780 rate
->flags
& IEEE80211_RATE_SHORT_PREAMBLE
)
781 info
->control
.rates
[i
].flags
|=
782 IEEE80211_TX_RC_USE_SHORT_PREAMBLE
;
784 /* set up G protection */
785 if (!rts
&& tx
->sdata
->vif
.bss_conf
.use_cts_prot
&&
786 rate
->flags
& IEEE80211_RATE_ERP_G
)
787 info
->control
.rates
[i
].flags
|=
788 IEEE80211_TX_RC_USE_CTS_PROTECT
;
794 static ieee80211_tx_result debug_noinline
795 ieee80211_tx_h_sequence(struct ieee80211_tx_data
*tx
)
797 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
798 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
804 * Packet injection may want to control the sequence
805 * number, if we have no matching interface then we
806 * neither assign one ourselves nor ask the driver to.
808 if (unlikely(info
->control
.vif
->type
== NL80211_IFTYPE_MONITOR
))
811 if (unlikely(ieee80211_is_ctl(hdr
->frame_control
)))
814 if (ieee80211_hdrlen(hdr
->frame_control
) < 24)
817 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
821 * Anything but QoS data that has a sequence number field
822 * (is long enough) gets a sequence number from the global
825 if (!ieee80211_is_data_qos(hdr
->frame_control
)) {
826 /* driver should assign sequence number */
827 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
828 /* for pure STA mode without beacons, we can do it */
829 hdr
->seq_ctrl
= cpu_to_le16(tx
->sdata
->sequence_number
);
830 tx
->sdata
->sequence_number
+= 0x10;
835 * This should be true for injected/management frames only, for
836 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
837 * above since they are not QoS-data frames.
842 /* include per-STA, per-TID sequence counter */
844 qc
= ieee80211_get_qos_ctl(hdr
);
845 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
846 seq
= &tx
->sta
->tid_seq
[tid
];
848 hdr
->seq_ctrl
= cpu_to_le16(*seq
);
850 /* Increase the sequence number. */
851 *seq
= (*seq
+ 0x10) & IEEE80211_SCTL_SEQ
;
856 static int ieee80211_fragment(struct ieee80211_tx_data
*tx
,
857 struct sk_buff
*skb
, int hdrlen
,
860 struct ieee80211_local
*local
= tx
->local
;
861 struct ieee80211_tx_info
*info
;
863 int per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
864 int pos
= hdrlen
+ per_fragm
;
865 int rem
= skb
->len
- hdrlen
- per_fragm
;
867 if (WARN_ON(rem
< 0))
870 /* first fragment was already added to queue by caller */
873 int fraglen
= per_fragm
;
878 tmp
= dev_alloc_skb(local
->tx_headroom
+
880 IEEE80211_ENCRYPT_HEADROOM
+
881 IEEE80211_ENCRYPT_TAILROOM
);
885 __skb_queue_tail(&tx
->skbs
, tmp
);
887 skb_reserve(tmp
, local
->tx_headroom
+
888 IEEE80211_ENCRYPT_HEADROOM
);
889 /* copy control information */
890 memcpy(tmp
->cb
, skb
->cb
, sizeof(tmp
->cb
));
892 info
= IEEE80211_SKB_CB(tmp
);
893 info
->flags
&= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT
|
894 IEEE80211_TX_CTL_FIRST_FRAGMENT
);
897 info
->flags
|= IEEE80211_TX_CTL_MORE_FRAMES
;
899 skb_copy_queue_mapping(tmp
, skb
);
900 tmp
->priority
= skb
->priority
;
903 /* copy header and data */
904 memcpy(skb_put(tmp
, hdrlen
), skb
->data
, hdrlen
);
905 memcpy(skb_put(tmp
, fraglen
), skb
->data
+ pos
, fraglen
);
910 /* adjust first fragment's length */
911 skb
->len
= hdrlen
+ per_fragm
;
915 static ieee80211_tx_result debug_noinline
916 ieee80211_tx_h_fragment(struct ieee80211_tx_data
*tx
)
918 struct sk_buff
*skb
= tx
->skb
;
919 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
920 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
921 int frag_threshold
= tx
->local
->hw
.wiphy
->frag_threshold
;
925 /* no matter what happens, tx->skb moves to tx->skbs */
926 __skb_queue_tail(&tx
->skbs
, skb
);
929 if (info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)
932 if (tx
->local
->ops
->set_frag_threshold
)
936 * Warn when submitting a fragmented A-MPDU frame and drop it.
937 * This scenario is handled in ieee80211_tx_prepare but extra
938 * caution taken here as fragmented ampdu may cause Tx stop.
940 if (WARN_ON(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
943 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
945 /* internal error, why isn't DONTFRAG set? */
946 if (WARN_ON(skb
->len
+ FCS_LEN
<= frag_threshold
))
950 * Now fragment the frame. This will allocate all the fragments and
951 * chain them (using skb as the first fragment) to skb->next.
952 * During transmission, we will remove the successfully transmitted
953 * fragments from this list. When the low-level driver rejects one
954 * of the fragments then we will simply pretend to accept the skb
955 * but store it away as pending.
957 if (ieee80211_fragment(tx
, skb
, hdrlen
, frag_threshold
))
960 /* update duration/seq/flags of fragments */
963 skb_queue_walk(&tx
->skbs
, skb
) {
964 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
966 hdr
= (void *)skb
->data
;
967 info
= IEEE80211_SKB_CB(skb
);
969 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
970 hdr
->frame_control
|= morefrags
;
972 * No multi-rate retries for fragmented frames, that
973 * would completely throw off the NAV at other STAs.
975 info
->control
.rates
[1].idx
= -1;
976 info
->control
.rates
[2].idx
= -1;
977 info
->control
.rates
[3].idx
= -1;
978 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 4);
979 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
981 hdr
->frame_control
&= ~morefrags
;
983 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
990 static ieee80211_tx_result debug_noinline
991 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
998 tx
->sta
->tx_packets
++;
999 skb_queue_walk(&tx
->skbs
, skb
) {
1000 tx
->sta
->tx_fragments
++;
1001 tx
->sta
->tx_bytes
+= skb
->len
;
1007 static ieee80211_tx_result debug_noinline
1008 ieee80211_tx_h_encrypt(struct ieee80211_tx_data
*tx
)
1013 switch (tx
->key
->conf
.cipher
) {
1014 case WLAN_CIPHER_SUITE_WEP40
:
1015 case WLAN_CIPHER_SUITE_WEP104
:
1016 return ieee80211_crypto_wep_encrypt(tx
);
1017 case WLAN_CIPHER_SUITE_TKIP
:
1018 return ieee80211_crypto_tkip_encrypt(tx
);
1019 case WLAN_CIPHER_SUITE_CCMP
:
1020 return ieee80211_crypto_ccmp_encrypt(tx
);
1021 case WLAN_CIPHER_SUITE_AES_CMAC
:
1022 return ieee80211_crypto_aes_cmac_encrypt(tx
);
1024 return ieee80211_crypto_hw_encrypt(tx
);
1030 static ieee80211_tx_result debug_noinline
1031 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data
*tx
)
1033 struct sk_buff
*skb
;
1034 struct ieee80211_hdr
*hdr
;
1038 skb_queue_walk(&tx
->skbs
, skb
) {
1039 hdr
= (void *) skb
->data
;
1040 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
)))
1041 break; /* must not overwrite AID */
1042 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1043 struct sk_buff
*next
= skb_queue_next(&tx
->skbs
, skb
);
1044 next_len
= next
->len
;
1047 group_addr
= is_multicast_ether_addr(hdr
->addr1
);
1050 ieee80211_duration(tx
, skb
, group_addr
, next_len
);
1056 /* actual transmit path */
1058 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data
*tx
,
1059 struct sk_buff
*skb
,
1060 struct ieee80211_tx_info
*info
,
1061 struct tid_ampdu_tx
*tid_tx
,
1064 bool queued
= false;
1065 bool reset_agg_timer
= false;
1066 struct sk_buff
*purge_skb
= NULL
;
1068 if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1069 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1070 reset_agg_timer
= true;
1071 } else if (test_bit(HT_AGG_STATE_WANT_START
, &tid_tx
->state
)) {
1073 * nothing -- this aggregation session is being started
1074 * but that might still fail with the driver
1077 spin_lock(&tx
->sta
->lock
);
1079 * Need to re-check now, because we may get here
1081 * 1) in the window during which the setup is actually
1082 * already done, but not marked yet because not all
1083 * packets are spliced over to the driver pending
1084 * queue yet -- if this happened we acquire the lock
1085 * either before or after the splice happens, but
1086 * need to recheck which of these cases happened.
1088 * 2) during session teardown, if the OPERATIONAL bit
1089 * was cleared due to the teardown but the pointer
1090 * hasn't been assigned NULL yet (or we loaded it
1091 * before it was assigned) -- in this case it may
1092 * now be NULL which means we should just let the
1093 * packet pass through because splicing the frames
1094 * back is already done.
1096 tid_tx
= rcu_dereference_protected_tid_tx(tx
->sta
, tid
);
1099 /* do nothing, let packet pass through */
1100 } else if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1101 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1102 reset_agg_timer
= true;
1105 info
->control
.vif
= &tx
->sdata
->vif
;
1106 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1107 __skb_queue_tail(&tid_tx
->pending
, skb
);
1108 if (skb_queue_len(&tid_tx
->pending
) > STA_MAX_TX_BUFFER
)
1109 purge_skb
= __skb_dequeue(&tid_tx
->pending
);
1111 spin_unlock(&tx
->sta
->lock
);
1114 ieee80211_free_txskb(&tx
->local
->hw
, purge_skb
);
1117 /* reset session timer */
1118 if (reset_agg_timer
&& tid_tx
->timeout
)
1119 tid_tx
->last_tx
= jiffies
;
1127 static ieee80211_tx_result
1128 ieee80211_tx_prepare(struct ieee80211_sub_if_data
*sdata
,
1129 struct ieee80211_tx_data
*tx
,
1130 struct sk_buff
*skb
)
1132 struct ieee80211_local
*local
= sdata
->local
;
1133 struct ieee80211_hdr
*hdr
;
1134 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1138 memset(tx
, 0, sizeof(*tx
));
1142 __skb_queue_head_init(&tx
->skbs
);
1145 * If this flag is set to true anywhere, and we get here,
1146 * we are doing the needed processing, so remove the flag
1149 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1151 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1153 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1154 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1155 if (!tx
->sta
&& sdata
->dev
->ieee80211_ptr
->use_4addr
)
1157 } else if (info
->flags
& IEEE80211_TX_CTL_INJECTED
||
1158 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1159 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1162 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1164 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1165 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1166 (local
->hw
.flags
& IEEE80211_HW_AMPDU_AGGREGATION
) &&
1167 !(local
->hw
.flags
& IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
)) {
1168 struct tid_ampdu_tx
*tid_tx
;
1170 qc
= ieee80211_get_qos_ctl(hdr
);
1171 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
1173 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1177 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1180 if (unlikely(queued
))
1185 if (is_multicast_ether_addr(hdr
->addr1
)) {
1186 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1187 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1189 tx
->flags
|= IEEE80211_TX_UNICAST
;
1191 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1192 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1193 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1194 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1195 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1199 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1200 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
))
1201 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1203 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1208 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1209 struct ieee80211_vif
*vif
,
1210 struct ieee80211_sta
*sta
,
1211 struct sk_buff_head
*skbs
,
1214 struct ieee80211_tx_control control
;
1215 struct sk_buff
*skb
, *tmp
;
1216 unsigned long flags
;
1218 skb_queue_walk_safe(skbs
, skb
, tmp
) {
1219 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1220 int q
= info
->hw_queue
;
1222 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1223 if (WARN_ON_ONCE(q
>= local
->hw
.queues
)) {
1224 __skb_unlink(skb
, skbs
);
1225 ieee80211_free_txskb(&local
->hw
, skb
);
1230 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1231 if (local
->queue_stop_reasons
[q
] ||
1232 (!txpending
&& !skb_queue_empty(&local
->pending
[q
]))) {
1233 if (unlikely(info
->flags
&
1234 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
)) {
1235 if (local
->queue_stop_reasons
[q
] &
1236 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL
)) {
1238 * Drop off-channel frames if queues
1239 * are stopped for any reason other
1240 * than off-channel operation. Never
1243 spin_unlock_irqrestore(
1244 &local
->queue_stop_reason_lock
,
1246 ieee80211_purge_tx_queue(&local
->hw
,
1253 * Since queue is stopped, queue up frames for
1254 * later transmission from the tx-pending
1255 * tasklet when the queue is woken again.
1258 skb_queue_splice_init(skbs
,
1259 &local
->pending
[q
]);
1261 skb_queue_splice_tail_init(skbs
,
1262 &local
->pending
[q
]);
1264 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1269 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1271 info
->control
.vif
= vif
;
1274 __skb_unlink(skb
, skbs
);
1275 drv_tx(local
, &control
, skb
);
1282 * Returns false if the frame couldn't be transmitted but was queued instead.
1284 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1285 struct sk_buff_head
*skbs
, int led_len
,
1286 struct sta_info
*sta
, bool txpending
)
1288 struct ieee80211_tx_info
*info
;
1289 struct ieee80211_sub_if_data
*sdata
;
1290 struct ieee80211_vif
*vif
;
1291 struct ieee80211_sta
*pubsta
;
1292 struct sk_buff
*skb
;
1296 if (WARN_ON(skb_queue_empty(skbs
)))
1299 skb
= skb_peek(skbs
);
1300 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1301 info
= IEEE80211_SKB_CB(skb
);
1302 sdata
= vif_to_sdata(info
->control
.vif
);
1303 if (sta
&& !sta
->uploaded
)
1311 switch (sdata
->vif
.type
) {
1312 case NL80211_IFTYPE_MONITOR
:
1313 sdata
= rcu_dereference(local
->monitor_sdata
);
1317 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1318 } else if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
1324 case NL80211_IFTYPE_AP_VLAN
:
1325 sdata
= container_of(sdata
->bss
,
1326 struct ieee80211_sub_if_data
, u
.ap
);
1333 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1336 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1337 ieee80211_led_tx(local
, 1);
1339 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1345 * Invoke TX handlers, return 0 on success and non-zero if the
1346 * frame was dropped or queued.
1348 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1350 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1351 ieee80211_tx_result res
= TX_DROP
;
1353 #define CALL_TXH(txh) \
1356 if (res != TX_CONTINUE) \
1360 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1361 CALL_TXH(ieee80211_tx_h_check_assoc
);
1362 CALL_TXH(ieee80211_tx_h_ps_buf
);
1363 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1364 CALL_TXH(ieee80211_tx_h_select_key
);
1365 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1366 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1368 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1369 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1374 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1375 CALL_TXH(ieee80211_tx_h_sequence
);
1376 CALL_TXH(ieee80211_tx_h_fragment
);
1377 /* handlers after fragment must be aware of tx info fragmentation! */
1378 CALL_TXH(ieee80211_tx_h_stats
);
1379 CALL_TXH(ieee80211_tx_h_encrypt
);
1380 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1381 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1385 if (unlikely(res
== TX_DROP
)) {
1386 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1388 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1390 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1392 } else if (unlikely(res
== TX_QUEUED
)) {
1393 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1401 * Returns false if the frame couldn't be transmitted but was queued instead.
1403 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1404 struct sk_buff
*skb
, bool txpending
,
1405 enum ieee80211_band band
)
1407 struct ieee80211_local
*local
= sdata
->local
;
1408 struct ieee80211_tx_data tx
;
1409 ieee80211_tx_result res_prepare
;
1410 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1414 if (unlikely(skb
->len
< 10)) {
1419 /* initialises tx */
1421 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, skb
);
1423 if (unlikely(res_prepare
== TX_DROP
)) {
1424 ieee80211_free_txskb(&local
->hw
, skb
);
1426 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1432 /* set up hw_queue value early */
1433 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1434 !(local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
))
1436 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1438 if (!invoke_tx_handlers(&tx
))
1439 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1445 /* device xmit handlers */
1447 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1448 struct sk_buff
*skb
,
1449 int head_need
, bool may_encrypt
)
1451 struct ieee80211_local
*local
= sdata
->local
;
1454 if (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
) {
1455 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1456 tail_need
-= skb_tailroom(skb
);
1457 tail_need
= max_t(int, tail_need
, 0);
1460 if (skb_cloned(skb
))
1461 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1462 else if (head_need
|| tail_need
)
1463 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1467 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1468 wiphy_debug(local
->hw
.wiphy
,
1469 "failed to reallocate TX buffer\n");
1476 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
1477 enum ieee80211_band band
)
1479 struct ieee80211_local
*local
= sdata
->local
;
1480 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1481 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1485 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1487 headroom
= local
->tx_headroom
;
1489 headroom
+= IEEE80211_ENCRYPT_HEADROOM
;
1490 headroom
-= skb_headroom(skb
);
1491 headroom
= max_t(int, 0, headroom
);
1493 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1494 ieee80211_free_txskb(&local
->hw
, skb
);
1498 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1499 info
->control
.vif
= &sdata
->vif
;
1501 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1502 if (ieee80211_is_data(hdr
->frame_control
) &&
1503 is_unicast_ether_addr(hdr
->addr1
)) {
1504 if (mesh_nexthop_resolve(sdata
, skb
))
1505 return; /* skb queued: don't free */
1507 ieee80211_mps_set_frame_flags(sdata
, NULL
, hdr
);
1511 ieee80211_set_qos_hdr(sdata
, skb
);
1512 ieee80211_tx(sdata
, skb
, false, band
);
1515 static bool ieee80211_parse_tx_radiotap(struct sk_buff
*skb
)
1517 struct ieee80211_radiotap_iterator iterator
;
1518 struct ieee80211_radiotap_header
*rthdr
=
1519 (struct ieee80211_radiotap_header
*) skb
->data
;
1520 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1521 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
1525 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1526 IEEE80211_TX_CTL_DONTFRAG
;
1529 * for every radiotap entry that is present
1530 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1531 * entries present, or -EINVAL on error)
1535 ret
= ieee80211_radiotap_iterator_next(&iterator
);
1540 /* see if this argument is something we can use */
1541 switch (iterator
.this_arg_index
) {
1543 * You must take care when dereferencing iterator.this_arg
1544 * for multibyte types... the pointer is not aligned. Use
1545 * get_unaligned((type *)iterator.this_arg) to dereference
1546 * iterator.this_arg for type "type" safely on all arches.
1548 case IEEE80211_RADIOTAP_FLAGS
:
1549 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
1551 * this indicates that the skb we have been
1552 * handed has the 32-bit FCS CRC at the end...
1553 * we should react to that by snipping it off
1554 * because it will be recomputed and added
1557 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
1560 skb_trim(skb
, skb
->len
- FCS_LEN
);
1562 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
1563 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1564 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
1565 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
1568 case IEEE80211_RADIOTAP_TX_FLAGS
:
1569 txflags
= get_unaligned_le16(iterator
.this_arg
);
1570 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
1571 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1575 * Please update the file
1576 * Documentation/networking/mac80211-injection.txt
1577 * when parsing new fields here.
1585 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
1589 * remove the radiotap header
1590 * iterator->_max_length was sanity-checked against
1591 * skb->len by iterator init
1593 skb_pull(skb
, iterator
._max_length
);
1598 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
1599 struct net_device
*dev
)
1601 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1602 struct ieee80211_chanctx_conf
*chanctx_conf
;
1603 struct ieee80211_channel
*chan
;
1604 struct ieee80211_radiotap_header
*prthdr
=
1605 (struct ieee80211_radiotap_header
*)skb
->data
;
1606 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1607 struct ieee80211_hdr
*hdr
;
1608 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
1612 /* check for not even having the fixed radiotap header part */
1613 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
1614 goto fail
; /* too short to be possibly valid */
1616 /* is it a header version we can trust to find length from? */
1617 if (unlikely(prthdr
->it_version
))
1618 goto fail
; /* only version 0 is supported */
1620 /* then there must be a radiotap header with a length we can use */
1621 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
1623 /* does the skb contain enough to deliver on the alleged length? */
1624 if (unlikely(skb
->len
< len_rthdr
))
1625 goto fail
; /* skb too short for claimed rt header extent */
1628 * fix up the pointers accounting for the radiotap
1629 * header still being in there. We are being given
1630 * a precooked IEEE80211 header so no need for
1633 skb_set_mac_header(skb
, len_rthdr
);
1635 * these are just fixed to the end of the rt area since we
1636 * don't have any better information and at this point, nobody cares
1638 skb_set_network_header(skb
, len_rthdr
);
1639 skb_set_transport_header(skb
, len_rthdr
);
1641 if (skb
->len
< len_rthdr
+ 2)
1644 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
1645 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1647 if (skb
->len
< len_rthdr
+ hdrlen
)
1651 * Initialize skb->protocol if the injected frame is a data frame
1652 * carrying a rfc1042 header
1654 if (ieee80211_is_data(hdr
->frame_control
) &&
1655 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
1656 u8
*payload
= (u8
*)hdr
+ hdrlen
;
1658 if (ether_addr_equal(payload
, rfc1042_header
))
1659 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
1663 memset(info
, 0, sizeof(*info
));
1665 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1666 IEEE80211_TX_CTL_INJECTED
;
1668 /* process and remove the injection radiotap header */
1669 if (!ieee80211_parse_tx_radiotap(skb
))
1675 * We process outgoing injected frames that have a local address
1676 * we handle as though they are non-injected frames.
1677 * This code here isn't entirely correct, the local MAC address
1678 * isn't always enough to find the interface to use; for proper
1679 * VLAN/WDS support we will need a different mechanism (which
1680 * likely isn't going to be monitor interfaces).
1682 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1684 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
1685 if (!ieee80211_sdata_running(tmp_sdata
))
1687 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1688 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1689 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
1691 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
1697 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1698 if (!chanctx_conf
) {
1699 tmp_sdata
= rcu_dereference(local
->monitor_sdata
);
1702 rcu_dereference(tmp_sdata
->vif
.chanctx_conf
);
1706 chan
= chanctx_conf
->def
.chan
;
1707 else if (!local
->use_chanctx
)
1708 chan
= local
->_oper_channel
;
1713 * Frame injection is not allowed if beaconing is not allowed
1714 * or if we need radar detection. Beaconing is usually not allowed when
1715 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1716 * Passive scan is also used in world regulatory domains where
1717 * your country is not known and as such it should be treated as
1718 * NO TX unless the channel is explicitly allowed in which case
1719 * your current regulatory domain would not have the passive scan
1722 * Since AP mode uses monitor interfaces to inject/TX management
1723 * frames we can make AP mode the exception to this rule once it
1724 * supports radar detection as its implementation can deal with
1725 * radar detection by itself. We can do that later by adding a
1726 * monitor flag interfaces used for AP support.
1728 if ((chan
->flags
& (IEEE80211_CHAN_NO_IBSS
| IEEE80211_CHAN_RADAR
|
1729 IEEE80211_CHAN_PASSIVE_SCAN
)))
1732 ieee80211_xmit(sdata
, skb
, chan
->band
);
1735 return NETDEV_TX_OK
;
1741 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
1745 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1746 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1747 * @skb: packet to be sent
1748 * @dev: incoming interface
1750 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1751 * not be freed, and caller is responsible for either retrying later or freeing
1754 * This function takes in an Ethernet header and encapsulates it with suitable
1755 * IEEE 802.11 header based on which interface the packet is coming in. The
1756 * encapsulated packet will then be passed to master interface, wlan#.11, for
1757 * transmission (through low-level driver).
1759 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
1760 struct net_device
*dev
)
1762 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1763 struct ieee80211_local
*local
= sdata
->local
;
1764 struct ieee80211_tx_info
*info
;
1766 u16 ethertype
, hdrlen
, meshhdrlen
= 0;
1768 struct ieee80211_hdr hdr
;
1769 struct ieee80211s_hdr mesh_hdr __maybe_unused
;
1770 struct mesh_path __maybe_unused
*mppath
= NULL
, *mpath
= NULL
;
1771 const u8
*encaps_data
;
1772 int encaps_len
, skip_header_bytes
;
1774 struct sta_info
*sta
= NULL
;
1775 bool wme_sta
= false, authorized
= false, tdls_auth
= false;
1776 bool tdls_direct
= false;
1780 struct ieee80211_chanctx_conf
*chanctx_conf
;
1781 struct ieee80211_sub_if_data
*ap_sdata
;
1782 enum ieee80211_band band
;
1784 if (unlikely(skb
->len
< ETH_HLEN
))
1787 /* convert Ethernet header to proper 802.11 header (based on
1788 * operation mode) */
1789 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
1790 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
1794 switch (sdata
->vif
.type
) {
1795 case NL80211_IFTYPE_AP_VLAN
:
1796 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1798 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1800 memcpy(hdr
.addr1
, sta
->sta
.addr
, ETH_ALEN
);
1801 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1802 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1803 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1805 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1806 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1808 ap_sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1810 chanctx_conf
= rcu_dereference(ap_sdata
->vif
.chanctx_conf
);
1813 band
= chanctx_conf
->def
.chan
->band
;
1817 case NL80211_IFTYPE_AP
:
1818 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1819 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1822 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
1824 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1825 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1826 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1828 band
= chanctx_conf
->def
.chan
->band
;
1830 case NL80211_IFTYPE_WDS
:
1831 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1833 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
1834 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1835 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1836 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1839 * This is the exception! WDS style interfaces are prohibited
1840 * when channel contexts are in used so this must be valid
1842 band
= local
->hw
.conf
.channel
->band
;
1844 #ifdef CONFIG_MAC80211_MESH
1845 case NL80211_IFTYPE_MESH_POINT
:
1846 if (!sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
) {
1847 /* Do not send frames with mesh_ttl == 0 */
1848 sdata
->u
.mesh
.mshstats
.dropped_frames_ttl
++;
1852 if (!is_multicast_ether_addr(skb
->data
)) {
1853 struct sta_info
*next_hop
;
1854 bool mpp_lookup
= true;
1856 mpath
= mesh_path_lookup(sdata
, skb
->data
);
1859 next_hop
= rcu_dereference(mpath
->next_hop
);
1861 !(mpath
->flags
& (MESH_PATH_ACTIVE
|
1862 MESH_PATH_RESOLVING
)))
1867 mppath
= mpp_path_lookup(sdata
, skb
->data
);
1869 if (mppath
&& mpath
)
1870 mesh_path_del(mpath
->sdata
, mpath
->dst
);
1874 * Use address extension if it is a packet from
1875 * another interface or if we know the destination
1876 * is being proxied by a portal (i.e. portal address
1877 * differs from proxied address)
1879 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
1880 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
1881 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1882 skb
->data
, skb
->data
+ ETH_ALEN
);
1883 meshhdrlen
= ieee80211_new_mesh_header(sdata
, &mesh_hdr
,
1886 /* DS -> MBSS (802.11-2012 13.11.3.3).
1887 * For unicast with unknown forwarding information,
1888 * destination might be in the MBSS or if that fails
1889 * forwarded to another mesh gate. In either case
1890 * resolution will be handled in ieee80211_xmit(), so
1891 * leave the original DA. This also works for mcast */
1892 const u8
*mesh_da
= skb
->data
;
1895 mesh_da
= mppath
->mpp
;
1897 mesh_da
= mpath
->dst
;
1899 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1900 mesh_da
, sdata
->vif
.addr
);
1901 if (is_multicast_ether_addr(mesh_da
))
1902 /* DA TA mSA AE:SA */
1903 meshhdrlen
= ieee80211_new_mesh_header(
1905 skb
->data
+ ETH_ALEN
, NULL
);
1907 /* RA TA mDA mSA AE:DA SA */
1908 meshhdrlen
= ieee80211_new_mesh_header(
1909 sdata
, &mesh_hdr
, skb
->data
,
1910 skb
->data
+ ETH_ALEN
);
1913 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1916 band
= chanctx_conf
->def
.chan
->band
;
1919 case NL80211_IFTYPE_STATION
:
1920 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
1921 bool tdls_peer
= false;
1923 sta
= sta_info_get(sdata
, skb
->data
);
1925 authorized
= test_sta_flag(sta
,
1926 WLAN_STA_AUTHORIZED
);
1927 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1928 tdls_peer
= test_sta_flag(sta
,
1929 WLAN_STA_TDLS_PEER
);
1930 tdls_auth
= test_sta_flag(sta
,
1931 WLAN_STA_TDLS_PEER_AUTH
);
1935 * If the TDLS link is enabled, send everything
1936 * directly. Otherwise, allow TDLS setup frames
1937 * to be transmitted indirectly.
1939 tdls_direct
= tdls_peer
&& (tdls_auth
||
1940 !(ethertype
== ETH_P_TDLS
&& skb
->len
> 14 &&
1941 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
));
1945 /* link during setup - throw out frames to peer */
1950 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1951 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1952 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1954 } else if (sdata
->u
.mgd
.use_4addr
&&
1955 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
1956 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
1957 IEEE80211_FCTL_TODS
);
1959 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1960 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1961 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1962 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1965 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
1967 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1968 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1969 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1972 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1975 band
= chanctx_conf
->def
.chan
->band
;
1977 case NL80211_IFTYPE_ADHOC
:
1979 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1980 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1981 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
1983 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1986 band
= chanctx_conf
->def
.chan
->band
;
1993 * There's no need to try to look up the destination
1994 * if it is a multicast address (which can only happen
1997 multicast
= is_multicast_ether_addr(hdr
.addr1
);
1999 sta
= sta_info_get(sdata
, hdr
.addr1
);
2001 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2002 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
2006 /* For mesh, the use of the QoS header is mandatory */
2007 if (ieee80211_vif_is_mesh(&sdata
->vif
))
2010 /* receiver and we are QoS enabled, use a QoS type frame */
2011 if (wme_sta
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
) {
2012 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2017 * Drop unicast frames to unauthorised stations unless they are
2018 * EAPOL frames from the local station.
2020 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2021 !is_multicast_ether_addr(hdr
.addr1
) && !authorized
&&
2022 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
2023 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
2024 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2025 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2026 dev
->name
, hdr
.addr1
);
2029 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
2034 if (unlikely(!multicast
&& skb
->sk
&&
2035 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
2036 struct sk_buff
*orig_skb
= skb
;
2038 skb
= skb_clone(skb
, GFP_ATOMIC
);
2040 unsigned long flags
;
2043 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
2044 id
= idr_alloc(&local
->ack_status_frames
, orig_skb
,
2045 1, 0x10000, GFP_ATOMIC
);
2046 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2050 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2051 } else if (skb_shared(skb
)) {
2052 kfree_skb(orig_skb
);
2058 /* couldn't clone -- lose tx status ... */
2064 * If the skb is shared we need to obtain our own copy.
2066 if (skb_shared(skb
)) {
2067 struct sk_buff
*tmp_skb
= skb
;
2069 /* can't happen -- skb is a clone if info_id != 0 */
2072 skb
= skb_clone(skb
, GFP_ATOMIC
);
2079 hdr
.frame_control
= fc
;
2080 hdr
.duration_id
= 0;
2083 skip_header_bytes
= ETH_HLEN
;
2084 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2085 encaps_data
= bridge_tunnel_header
;
2086 encaps_len
= sizeof(bridge_tunnel_header
);
2087 skip_header_bytes
-= 2;
2088 } else if (ethertype
>= 0x600) {
2089 encaps_data
= rfc1042_header
;
2090 encaps_len
= sizeof(rfc1042_header
);
2091 skip_header_bytes
-= 2;
2097 nh_pos
= skb_network_header(skb
) - skb
->data
;
2098 h_pos
= skb_transport_header(skb
) - skb
->data
;
2100 skb_pull(skb
, skip_header_bytes
);
2101 nh_pos
-= skip_header_bytes
;
2102 h_pos
-= skip_header_bytes
;
2104 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2107 * So we need to modify the skb header and hence need a copy of
2108 * that. The head_need variable above doesn't, so far, include
2109 * the needed header space that we don't need right away. If we
2110 * can, then we don't reallocate right now but only after the
2111 * frame arrives at the master device (if it does...)
2113 * If we cannot, however, then we will reallocate to include all
2114 * the ever needed space. Also, if we need to reallocate it anyway,
2115 * make it big enough for everything we may ever need.
2118 if (head_need
> 0 || skb_cloned(skb
)) {
2119 head_need
+= IEEE80211_ENCRYPT_HEADROOM
;
2120 head_need
+= local
->tx_headroom
;
2121 head_need
= max_t(int, 0, head_need
);
2122 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true)) {
2123 ieee80211_free_txskb(&local
->hw
, skb
);
2130 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2131 nh_pos
+= encaps_len
;
2132 h_pos
+= encaps_len
;
2135 #ifdef CONFIG_MAC80211_MESH
2136 if (meshhdrlen
> 0) {
2137 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2138 nh_pos
+= meshhdrlen
;
2139 h_pos
+= meshhdrlen
;
2143 if (ieee80211_is_data_qos(fc
)) {
2144 __le16
*qos_control
;
2146 qos_control
= (__le16
*) skb_push(skb
, 2);
2147 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2149 * Maybe we could actually set some fields here, for now just
2150 * initialise to zero to indicate no special operation.
2154 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2159 dev
->stats
.tx_packets
++;
2160 dev
->stats
.tx_bytes
+= skb
->len
;
2162 /* Update skb pointers to various headers since this modified frame
2163 * is going to go through Linux networking code that may potentially
2164 * need things like pointer to IP header. */
2165 skb_set_mac_header(skb
, 0);
2166 skb_set_network_header(skb
, nh_pos
);
2167 skb_set_transport_header(skb
, h_pos
);
2169 info
= IEEE80211_SKB_CB(skb
);
2170 memset(info
, 0, sizeof(*info
));
2172 dev
->trans_start
= jiffies
;
2174 info
->flags
= info_flags
;
2175 info
->ack_frame_id
= info_id
;
2177 ieee80211_xmit(sdata
, skb
, band
);
2180 return NETDEV_TX_OK
;
2186 return NETDEV_TX_OK
;
2191 * ieee80211_clear_tx_pending may not be called in a context where
2192 * it is possible that it packets could come in again.
2194 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
2196 struct sk_buff
*skb
;
2199 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2200 while ((skb
= skb_dequeue(&local
->pending
[i
])) != NULL
)
2201 ieee80211_free_txskb(&local
->hw
, skb
);
2206 * Returns false if the frame couldn't be transmitted but was queued instead,
2207 * which in this case means re-queued -- take as an indication to stop sending
2208 * more pending frames.
2210 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
2211 struct sk_buff
*skb
)
2213 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2214 struct ieee80211_sub_if_data
*sdata
;
2215 struct sta_info
*sta
;
2216 struct ieee80211_hdr
*hdr
;
2218 struct ieee80211_chanctx_conf
*chanctx_conf
;
2220 sdata
= vif_to_sdata(info
->control
.vif
);
2222 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
2223 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2224 if (unlikely(!chanctx_conf
)) {
2228 result
= ieee80211_tx(sdata
, skb
, true,
2229 chanctx_conf
->def
.chan
->band
);
2231 struct sk_buff_head skbs
;
2233 __skb_queue_head_init(&skbs
);
2234 __skb_queue_tail(&skbs
, skb
);
2236 hdr
= (struct ieee80211_hdr
*)skb
->data
;
2237 sta
= sta_info_get(sdata
, hdr
->addr1
);
2239 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
2246 * Transmit all pending packets. Called from tasklet.
2248 void ieee80211_tx_pending(unsigned long data
)
2250 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
2251 unsigned long flags
;
2257 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
2258 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2260 * If queue is stopped by something other than due to pending
2261 * frames, or we have no pending frames, proceed to next queue.
2263 if (local
->queue_stop_reasons
[i
] ||
2264 skb_queue_empty(&local
->pending
[i
]))
2267 while (!skb_queue_empty(&local
->pending
[i
])) {
2268 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
2269 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2271 if (WARN_ON(!info
->control
.vif
)) {
2272 ieee80211_free_txskb(&local
->hw
, skb
);
2276 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
2279 txok
= ieee80211_tx_pending_skb(local
, skb
);
2280 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
2286 if (skb_queue_empty(&local
->pending
[i
]))
2287 ieee80211_propagate_queue_wake(local
, i
);
2289 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
2294 /* functions for drivers to get certain frames */
2296 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2297 struct ps_data
*ps
, struct sk_buff
*skb
)
2301 int i
, have_bits
= 0, n1
, n2
;
2303 /* Generate bitmap for TIM only if there are any STAs in power save
2305 if (atomic_read(&ps
->num_sta_ps
) > 0)
2306 /* in the hope that this is faster than
2307 * checking byte-for-byte */
2308 have_bits
= !bitmap_empty((unsigned long*)ps
->tim
,
2309 IEEE80211_MAX_AID
+1);
2311 if (ps
->dtim_count
== 0)
2312 ps
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
2316 tim
= pos
= (u8
*) skb_put(skb
, 6);
2317 *pos
++ = WLAN_EID_TIM
;
2319 *pos
++ = ps
->dtim_count
;
2320 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
2322 if (ps
->dtim_count
== 0 && !skb_queue_empty(&ps
->bc_buf
))
2325 ps
->dtim_bc_mc
= aid0
== 1;
2328 /* Find largest even number N1 so that bits numbered 1 through
2329 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2330 * (N2 + 1) x 8 through 2007 are 0. */
2332 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
2339 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
2346 /* Bitmap control */
2348 /* Part Virt Bitmap */
2349 skb_put(skb
, n2
- n1
);
2350 memcpy(pos
, ps
->tim
+ n1
, n2
- n1
+ 1);
2352 tim
[1] = n2
- n1
+ 4;
2354 *pos
++ = aid0
; /* Bitmap control */
2355 *pos
++ = 0; /* Part Virt Bitmap */
2359 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2360 struct ps_data
*ps
, struct sk_buff
*skb
)
2362 struct ieee80211_local
*local
= sdata
->local
;
2365 * Not very nice, but we want to allow the driver to call
2366 * ieee80211_beacon_get() as a response to the set_tim()
2367 * callback. That, however, is already invoked under the
2368 * sta_lock to guarantee consistent and race-free update
2369 * of the tim bitmap in mac80211 and the driver.
2371 if (local
->tim_in_locked_section
) {
2372 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2374 spin_lock_bh(&local
->tim_lock
);
2375 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2376 spin_unlock_bh(&local
->tim_lock
);
2382 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
2383 struct ieee80211_vif
*vif
,
2384 u16
*tim_offset
, u16
*tim_length
)
2386 struct ieee80211_local
*local
= hw_to_local(hw
);
2387 struct sk_buff
*skb
= NULL
;
2388 struct ieee80211_tx_info
*info
;
2389 struct ieee80211_sub_if_data
*sdata
= NULL
;
2390 enum ieee80211_band band
;
2391 struct ieee80211_tx_rate_control txrc
;
2392 struct ieee80211_chanctx_conf
*chanctx_conf
;
2396 sdata
= vif_to_sdata(vif
);
2397 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2399 if (!ieee80211_sdata_running(sdata
) || !chanctx_conf
)
2407 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2408 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2409 struct beacon_data
*beacon
= rcu_dereference(ap
->beacon
);
2413 * headroom, head length,
2414 * tail length and maximum TIM length
2416 skb
= dev_alloc_skb(local
->tx_headroom
+
2418 beacon
->tail_len
+ 256);
2422 skb_reserve(skb
, local
->tx_headroom
);
2423 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
2426 ieee80211_beacon_add_tim(sdata
, &ap
->ps
, skb
);
2429 *tim_offset
= beacon
->head_len
;
2431 *tim_length
= skb
->len
- beacon
->head_len
;
2434 memcpy(skb_put(skb
, beacon
->tail_len
),
2435 beacon
->tail
, beacon
->tail_len
);
2438 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2439 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2440 struct ieee80211_hdr
*hdr
;
2441 struct sk_buff
*presp
= rcu_dereference(ifibss
->presp
);
2446 skb
= skb_copy(presp
, GFP_ATOMIC
);
2450 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2451 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2452 IEEE80211_STYPE_BEACON
);
2453 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2454 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2455 struct beacon_data
*bcn
= rcu_dereference(ifmsh
->beacon
);
2460 if (ifmsh
->sync_ops
)
2461 ifmsh
->sync_ops
->adjust_tbtt(
2464 skb
= dev_alloc_skb(local
->tx_headroom
+
2470 skb_reserve(skb
, local
->tx_headroom
);
2471 memcpy(skb_put(skb
, bcn
->head_len
), bcn
->head
, bcn
->head_len
);
2472 ieee80211_beacon_add_tim(sdata
, &ifmsh
->ps
, skb
);
2473 memcpy(skb_put(skb
, bcn
->tail_len
), bcn
->tail
, bcn
->tail_len
);
2479 band
= chanctx_conf
->def
.chan
->band
;
2481 info
= IEEE80211_SKB_CB(skb
);
2483 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
2484 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
2487 memset(&txrc
, 0, sizeof(txrc
));
2489 txrc
.sband
= local
->hw
.wiphy
->bands
[band
];
2490 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
2492 txrc
.reported_rate
.idx
= -1;
2493 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
2494 if (txrc
.rate_idx_mask
== (1 << txrc
.sband
->n_bitrates
) - 1)
2495 txrc
.max_rate_idx
= -1;
2497 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
2498 memcpy(txrc
.rate_idx_mcs_mask
, sdata
->rc_rateidx_mcs_mask
[band
],
2499 sizeof(txrc
.rate_idx_mcs_mask
));
2501 rate_control_get_rate(sdata
, NULL
, &txrc
);
2503 info
->control
.vif
= vif
;
2505 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
2506 IEEE80211_TX_CTL_ASSIGN_SEQ
|
2507 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
2512 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
2514 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
2515 struct ieee80211_vif
*vif
)
2517 struct ieee80211_if_ap
*ap
= NULL
;
2518 struct sk_buff
*skb
= NULL
;
2519 struct probe_resp
*presp
= NULL
;
2520 struct ieee80211_hdr
*hdr
;
2521 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2523 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
2529 presp
= rcu_dereference(ap
->probe_resp
);
2533 skb
= dev_alloc_skb(presp
->len
);
2537 memcpy(skb_put(skb
, presp
->len
), presp
->data
, presp
->len
);
2539 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2540 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
2546 EXPORT_SYMBOL(ieee80211_proberesp_get
);
2548 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
2549 struct ieee80211_vif
*vif
)
2551 struct ieee80211_sub_if_data
*sdata
;
2552 struct ieee80211_if_managed
*ifmgd
;
2553 struct ieee80211_pspoll
*pspoll
;
2554 struct ieee80211_local
*local
;
2555 struct sk_buff
*skb
;
2557 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2560 sdata
= vif_to_sdata(vif
);
2561 ifmgd
= &sdata
->u
.mgd
;
2562 local
= sdata
->local
;
2564 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
2568 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2570 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
2571 memset(pspoll
, 0, sizeof(*pspoll
));
2572 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
2573 IEEE80211_STYPE_PSPOLL
);
2574 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
2576 /* aid in PS-Poll has its two MSBs each set to 1 */
2577 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
2579 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
2580 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
2584 EXPORT_SYMBOL(ieee80211_pspoll_get
);
2586 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
2587 struct ieee80211_vif
*vif
)
2589 struct ieee80211_hdr_3addr
*nullfunc
;
2590 struct ieee80211_sub_if_data
*sdata
;
2591 struct ieee80211_if_managed
*ifmgd
;
2592 struct ieee80211_local
*local
;
2593 struct sk_buff
*skb
;
2595 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2598 sdata
= vif_to_sdata(vif
);
2599 ifmgd
= &sdata
->u
.mgd
;
2600 local
= sdata
->local
;
2602 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*nullfunc
));
2606 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2608 nullfunc
= (struct ieee80211_hdr_3addr
*) skb_put(skb
,
2610 memset(nullfunc
, 0, sizeof(*nullfunc
));
2611 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
2612 IEEE80211_STYPE_NULLFUNC
|
2613 IEEE80211_FCTL_TODS
);
2614 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
2615 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
2616 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
2620 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
2622 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
2623 struct ieee80211_vif
*vif
,
2624 const u8
*ssid
, size_t ssid_len
,
2627 struct ieee80211_sub_if_data
*sdata
;
2628 struct ieee80211_local
*local
;
2629 struct ieee80211_hdr_3addr
*hdr
;
2630 struct sk_buff
*skb
;
2634 sdata
= vif_to_sdata(vif
);
2635 local
= sdata
->local
;
2636 ie_ssid_len
= 2 + ssid_len
;
2638 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
2639 ie_ssid_len
+ tailroom
);
2643 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2645 hdr
= (struct ieee80211_hdr_3addr
*) skb_put(skb
, sizeof(*hdr
));
2646 memset(hdr
, 0, sizeof(*hdr
));
2647 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2648 IEEE80211_STYPE_PROBE_REQ
);
2649 eth_broadcast_addr(hdr
->addr1
);
2650 memcpy(hdr
->addr2
, vif
->addr
, ETH_ALEN
);
2651 eth_broadcast_addr(hdr
->addr3
);
2653 pos
= skb_put(skb
, ie_ssid_len
);
2654 *pos
++ = WLAN_EID_SSID
;
2657 memcpy(pos
, ssid
, ssid_len
);
2662 EXPORT_SYMBOL(ieee80211_probereq_get
);
2664 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2665 const void *frame
, size_t frame_len
,
2666 const struct ieee80211_tx_info
*frame_txctl
,
2667 struct ieee80211_rts
*rts
)
2669 const struct ieee80211_hdr
*hdr
= frame
;
2671 rts
->frame_control
=
2672 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
2673 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
2675 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
2676 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
2678 EXPORT_SYMBOL(ieee80211_rts_get
);
2680 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2681 const void *frame
, size_t frame_len
,
2682 const struct ieee80211_tx_info
*frame_txctl
,
2683 struct ieee80211_cts
*cts
)
2685 const struct ieee80211_hdr
*hdr
= frame
;
2687 cts
->frame_control
=
2688 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
2689 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
2690 frame_len
, frame_txctl
);
2691 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
2693 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
2696 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
2697 struct ieee80211_vif
*vif
)
2699 struct ieee80211_local
*local
= hw_to_local(hw
);
2700 struct sk_buff
*skb
= NULL
;
2701 struct ieee80211_tx_data tx
;
2702 struct ieee80211_sub_if_data
*sdata
;
2704 struct ieee80211_tx_info
*info
;
2705 struct ieee80211_chanctx_conf
*chanctx_conf
;
2707 sdata
= vif_to_sdata(vif
);
2710 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2715 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2716 struct beacon_data
*beacon
=
2717 rcu_dereference(sdata
->u
.ap
.beacon
);
2719 if (!beacon
|| !beacon
->head
)
2722 ps
= &sdata
->u
.ap
.ps
;
2723 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2724 ps
= &sdata
->u
.mesh
.ps
;
2729 if (ps
->dtim_count
!= 0 || !ps
->dtim_bc_mc
)
2730 goto out
; /* send buffered bc/mc only after DTIM beacon */
2733 skb
= skb_dequeue(&ps
->bc_buf
);
2736 local
->total_ps_buffered
--;
2738 if (!skb_queue_empty(&ps
->bc_buf
) && skb
->len
>= 2) {
2739 struct ieee80211_hdr
*hdr
=
2740 (struct ieee80211_hdr
*) skb
->data
;
2741 /* more buffered multicast/broadcast frames ==> set
2742 * MoreData flag in IEEE 802.11 header to inform PS
2744 hdr
->frame_control
|=
2745 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
2748 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
2749 sdata
= IEEE80211_DEV_TO_SUB_IF(skb
->dev
);
2750 if (!ieee80211_tx_prepare(sdata
, &tx
, skb
))
2752 dev_kfree_skb_any(skb
);
2755 info
= IEEE80211_SKB_CB(skb
);
2757 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
2758 info
->band
= chanctx_conf
->def
.chan
->band
;
2760 if (invoke_tx_handlers(&tx
))
2767 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
2769 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data
*sdata
,
2770 struct sk_buff
*skb
, int tid
,
2771 enum ieee80211_band band
)
2773 int ac
= ieee802_1d_to_ac
[tid
& 7];
2775 skb_set_mac_header(skb
, 0);
2776 skb_set_network_header(skb
, 0);
2777 skb_set_transport_header(skb
, 0);
2779 skb_set_queue_mapping(skb
, ac
);
2780 skb
->priority
= tid
;
2782 skb
->dev
= sdata
->dev
;
2785 * The other path calling ieee80211_xmit is from the tasklet,
2786 * and while we can handle concurrent transmissions locking
2787 * requirements are that we do not come into tx with bhs on.
2790 ieee80211_xmit(sdata
, skb
, band
);