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
[tx
->channel
->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_NUM_BANDS
:
149 /* No matching basic rate found; use highest suitable mandatory
154 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
155 if (ieee80211_is_data_qos(hdr
->frame_control
) &&
156 *(ieee80211_get_qos_ctl(hdr
)) | IEEE80211_QOS_CTL_ACK_POLICY_NOACK
)
159 /* Time needed to transmit ACK
160 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
161 * to closest integer */
162 dur
= ieee80211_frame_duration(sband
->band
, 10, rate
, erp
,
163 tx
->sdata
->vif
.bss_conf
.use_short_preamble
);
166 /* Frame is fragmented: duration increases with time needed to
167 * transmit next fragment plus ACK and 2 x SIFS. */
168 dur
*= 2; /* ACK + SIFS */
170 dur
+= ieee80211_frame_duration(sband
->band
, next_frag_len
,
171 txrate
->bitrate
, erp
,
172 tx
->sdata
->vif
.bss_conf
.use_short_preamble
);
175 return cpu_to_le16(dur
);
178 static inline int is_ieee80211_device(struct ieee80211_local
*local
,
179 struct net_device
*dev
)
181 return local
== wdev_priv(dev
->ieee80211_ptr
);
185 static ieee80211_tx_result debug_noinline
186 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data
*tx
)
188 struct ieee80211_local
*local
= tx
->local
;
189 struct ieee80211_if_managed
*ifmgd
;
191 /* driver doesn't support power save */
192 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
))
195 /* hardware does dynamic power save */
196 if (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)
199 /* dynamic power save disabled */
200 if (local
->hw
.conf
.dynamic_ps_timeout
<= 0)
203 /* we are scanning, don't enable power save */
207 if (!local
->ps_sdata
)
210 /* No point if we're going to suspend */
211 if (local
->quiescing
)
214 /* dynamic ps is supported only in managed mode */
215 if (tx
->sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
218 ifmgd
= &tx
->sdata
->u
.mgd
;
221 * Don't wakeup from power save if u-apsd is enabled, voip ac has
222 * u-apsd enabled and the frame is in voip class. This effectively
223 * means that even if all access categories have u-apsd enabled, in
224 * practise u-apsd is only used with the voip ac. This is a
225 * workaround for the case when received voip class packets do not
226 * have correct qos tag for some reason, due the network or the
229 * Note: ifmgd->uapsd_queues access is racy here. If the value is
230 * changed via debugfs, user needs to reassociate manually to have
231 * everything in sync.
233 if ((ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
) &&
234 (ifmgd
->uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
) &&
235 skb_get_queue_mapping(tx
->skb
) == IEEE80211_AC_VO
)
238 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
239 ieee80211_stop_queues_by_reason(&local
->hw
,
240 IEEE80211_QUEUE_STOP_REASON_PS
);
241 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
242 ieee80211_queue_work(&local
->hw
,
243 &local
->dynamic_ps_disable_work
);
246 /* Don't restart the timer if we're not disassociated */
247 if (!ifmgd
->associated
)
250 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
251 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
256 static ieee80211_tx_result debug_noinline
257 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data
*tx
)
260 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
261 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
264 if (unlikely(info
->flags
& IEEE80211_TX_CTL_INJECTED
))
267 if (unlikely(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
)) &&
268 test_bit(SDATA_STATE_OFFCHANNEL
, &tx
->sdata
->state
) &&
269 !ieee80211_is_probe_req(hdr
->frame_control
) &&
270 !ieee80211_is_nullfunc(hdr
->frame_control
))
272 * When software scanning only nullfunc frames (to notify
273 * the sleep state to the AP) and probe requests (for the
274 * active scan) are allowed, all other frames should not be
275 * sent and we should not get here, but if we do
276 * nonetheless, drop them to avoid sending them
277 * off-channel. See the link below and
278 * ieee80211_start_scan() for more.
280 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
284 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
287 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
290 if (tx
->flags
& IEEE80211_TX_PS_BUFFERED
)
294 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
296 if (likely(tx
->flags
& IEEE80211_TX_UNICAST
)) {
297 if (unlikely(!assoc
&&
298 ieee80211_is_data(hdr
->frame_control
))) {
299 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
300 printk(KERN_DEBUG
"%s: dropped data frame to not "
301 "associated station %pM\n",
302 tx
->sdata
->name
, hdr
->addr1
);
303 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
304 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
307 } else if (unlikely(tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
308 ieee80211_is_data(hdr
->frame_control
) &&
309 !atomic_read(&tx
->sdata
->u
.ap
.num_mcast_sta
))) {
311 * No associated STAs - no need to send multicast
320 /* This function is called whenever the AP is about to exceed the maximum limit
321 * of buffered frames for power saving STAs. This situation should not really
322 * happen often during normal operation, so dropping the oldest buffered packet
323 * from each queue should be OK to make some room for new frames. */
324 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
326 int total
= 0, purged
= 0;
328 struct ieee80211_sub_if_data
*sdata
;
329 struct sta_info
*sta
;
332 * virtual interfaces are protected by RCU
336 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
337 struct ieee80211_if_ap
*ap
;
338 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
341 skb
= skb_dequeue(&ap
->ps_bc_buf
);
346 total
+= skb_queue_len(&ap
->ps_bc_buf
);
350 * Drop one frame from each station from the lowest-priority
351 * AC that has frames at all.
353 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
356 for (ac
= IEEE80211_AC_BK
; ac
>= IEEE80211_AC_VO
; ac
--) {
357 skb
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
358 total
+= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
369 local
->total_ps_buffered
= total
;
370 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
371 wiphy_debug(local
->hw
.wiphy
, "PS buffers full - purged %d frames\n",
376 static ieee80211_tx_result
377 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data
*tx
)
379 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
380 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
383 * broadcast/multicast frame
385 * If any of the associated stations is in power save mode,
386 * the frame is buffered to be sent after DTIM beacon frame.
387 * This is done either by the hardware or us.
390 /* powersaving STAs only in AP/VLAN mode */
394 /* no buffering for ordered frames */
395 if (ieee80211_has_order(hdr
->frame_control
))
398 /* no stations in PS mode */
399 if (!atomic_read(&tx
->sdata
->bss
->num_sta_ps
))
402 info
->flags
|= IEEE80211_TX_CTL_SEND_AFTER_DTIM
;
403 if (tx
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
404 info
->hw_queue
= tx
->sdata
->vif
.cab_queue
;
406 /* device releases frame after DTIM beacon */
407 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
))
410 /* buffered in mac80211 */
411 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
412 purge_old_ps_buffers(tx
->local
);
414 if (skb_queue_len(&tx
->sdata
->bss
->ps_bc_buf
) >= AP_MAX_BC_BUFFER
) {
415 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
417 printk(KERN_DEBUG
"%s: BC TX buffer full - dropping the oldest frame\n",
420 dev_kfree_skb(skb_dequeue(&tx
->sdata
->bss
->ps_bc_buf
));
422 tx
->local
->total_ps_buffered
++;
424 skb_queue_tail(&tx
->sdata
->bss
->ps_bc_buf
, tx
->skb
);
429 static int ieee80211_use_mfp(__le16 fc
, struct sta_info
*sta
,
432 if (!ieee80211_is_mgmt(fc
))
435 if (sta
== NULL
|| !test_sta_flag(sta
, WLAN_STA_MFP
))
438 if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr
*)
445 static ieee80211_tx_result
446 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data
*tx
)
448 struct sta_info
*sta
= tx
->sta
;
449 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
450 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
451 struct ieee80211_local
*local
= tx
->local
;
456 if (unlikely((test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
457 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) &&
458 !(info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
))) {
459 int ac
= skb_get_queue_mapping(tx
->skb
);
461 /* only deauth, disassoc and action are bufferable MMPDUs */
462 if (ieee80211_is_mgmt(hdr
->frame_control
) &&
463 !ieee80211_is_deauth(hdr
->frame_control
) &&
464 !ieee80211_is_disassoc(hdr
->frame_control
) &&
465 !ieee80211_is_action(hdr
->frame_control
)) {
466 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
470 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
471 printk(KERN_DEBUG
"STA %pM aid %d: PS buffer for AC %d\n",
472 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
473 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
474 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
475 purge_old_ps_buffers(tx
->local
);
476 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
477 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
478 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
480 printk(KERN_DEBUG
"%s: STA %pM TX buffer for "
481 "AC %d full - dropping oldest frame\n",
482 tx
->sdata
->name
, sta
->sta
.addr
, ac
);
486 tx
->local
->total_ps_buffered
++;
488 info
->control
.jiffies
= jiffies
;
489 info
->control
.vif
= &tx
->sdata
->vif
;
490 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
491 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
493 if (!timer_pending(&local
->sta_cleanup
))
494 mod_timer(&local
->sta_cleanup
,
495 round_jiffies(jiffies
+
496 STA_INFO_CLEANUP_INTERVAL
));
499 * We queued up some frames, so the TIM bit might
500 * need to be set, recalculate it.
502 sta_info_recalc_tim(sta
);
506 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
507 else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
509 "%s: STA %pM in PS mode, but polling/in SP -> send frame\n",
510 tx
->sdata
->name
, sta
->sta
.addr
);
512 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
517 static ieee80211_tx_result debug_noinline
518 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
520 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
523 if (tx
->flags
& IEEE80211_TX_UNICAST
)
524 return ieee80211_tx_h_unicast_ps_buf(tx
);
526 return ieee80211_tx_h_multicast_ps_buf(tx
);
529 static ieee80211_tx_result debug_noinline
530 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
532 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
534 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
&&
535 tx
->sdata
->control_port_no_encrypt
))
536 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
541 static ieee80211_tx_result debug_noinline
542 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
544 struct ieee80211_key
*key
= NULL
;
545 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
546 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
548 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
))
550 else if (tx
->sta
&& (key
= rcu_dereference(tx
->sta
->ptk
)))
552 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
553 is_multicast_ether_addr(hdr
->addr1
) &&
554 ieee80211_is_robust_mgmt_frame(hdr
) &&
555 (key
= rcu_dereference(tx
->sdata
->default_mgmt_key
)))
557 else if (is_multicast_ether_addr(hdr
->addr1
) &&
558 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
560 else if (!is_multicast_ether_addr(hdr
->addr1
) &&
561 (key
= rcu_dereference(tx
->sdata
->default_unicast_key
)))
563 else if (tx
->sdata
->drop_unencrypted
&&
564 (tx
->skb
->protocol
!= tx
->sdata
->control_port_protocol
) &&
565 !(info
->flags
& IEEE80211_TX_CTL_INJECTED
) &&
566 (!ieee80211_is_robust_mgmt_frame(hdr
) ||
567 (ieee80211_is_action(hdr
->frame_control
) &&
568 tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_MFP
)))) {
569 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_unencrypted
);
575 bool skip_hw
= false;
577 tx
->key
->tx_rx_count
++;
578 /* TODO: add threshold stuff again */
580 switch (tx
->key
->conf
.cipher
) {
581 case WLAN_CIPHER_SUITE_WEP40
:
582 case WLAN_CIPHER_SUITE_WEP104
:
583 case WLAN_CIPHER_SUITE_TKIP
:
584 if (!ieee80211_is_data_present(hdr
->frame_control
))
587 case WLAN_CIPHER_SUITE_CCMP
:
588 if (!ieee80211_is_data_present(hdr
->frame_control
) &&
589 !ieee80211_use_mfp(hdr
->frame_control
, tx
->sta
,
593 skip_hw
= (tx
->key
->conf
.flags
&
594 IEEE80211_KEY_FLAG_SW_MGMT
) &&
595 ieee80211_is_mgmt(hdr
->frame_control
);
597 case WLAN_CIPHER_SUITE_AES_CMAC
:
598 if (!ieee80211_is_mgmt(hdr
->frame_control
))
603 if (unlikely(tx
->key
&& tx
->key
->flags
& KEY_FLAG_TAINTED
))
606 if (!skip_hw
&& tx
->key
&&
607 tx
->key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
)
608 info
->control
.hw_key
= &tx
->key
->conf
;
614 static ieee80211_tx_result debug_noinline
615 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data
*tx
)
617 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
618 struct ieee80211_hdr
*hdr
= (void *)tx
->skb
->data
;
619 struct ieee80211_supported_band
*sband
;
620 struct ieee80211_rate
*rate
;
623 bool inval
= false, rts
= false, short_preamble
= false;
624 struct ieee80211_tx_rate_control txrc
;
627 memset(&txrc
, 0, sizeof(txrc
));
629 sband
= tx
->local
->hw
.wiphy
->bands
[tx
->channel
->band
];
631 len
= min_t(u32
, tx
->skb
->len
+ FCS_LEN
,
632 tx
->local
->hw
.wiphy
->frag_threshold
);
634 /* set up the tx rate control struct we give the RC algo */
635 txrc
.hw
= &tx
->local
->hw
;
637 txrc
.bss_conf
= &tx
->sdata
->vif
.bss_conf
;
639 txrc
.reported_rate
.idx
= -1;
640 txrc
.rate_idx_mask
= tx
->sdata
->rc_rateidx_mask
[tx
->channel
->band
];
641 if (txrc
.rate_idx_mask
== (1 << sband
->n_bitrates
) - 1)
642 txrc
.max_rate_idx
= -1;
644 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
645 memcpy(txrc
.rate_idx_mcs_mask
,
646 tx
->sdata
->rc_rateidx_mcs_mask
[tx
->channel
->band
],
647 sizeof(txrc
.rate_idx_mcs_mask
));
648 txrc
.bss
= (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
649 tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
||
650 tx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
);
652 /* set up RTS protection if desired */
653 if (len
> tx
->local
->hw
.wiphy
->rts_threshold
) {
654 txrc
.rts
= rts
= true;
658 * Use short preamble if the BSS can handle it, but not for
659 * management frames unless we know the receiver can handle
660 * that -- the management frame might be to a station that
661 * just wants a probe response.
663 if (tx
->sdata
->vif
.bss_conf
.use_short_preamble
&&
664 (ieee80211_is_data(hdr
->frame_control
) ||
665 (tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_SHORT_PREAMBLE
))))
666 txrc
.short_preamble
= short_preamble
= true;
669 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
672 * Lets not bother rate control if we're associated and cannot
673 * talk to the sta. This should not happen.
675 if (WARN(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
) && assoc
&&
676 !rate_usable_index_exists(sband
, &tx
->sta
->sta
),
677 "%s: Dropped data frame as no usable bitrate found while "
678 "scanning and associated. Target station: "
679 "%pM on %d GHz band\n",
680 tx
->sdata
->name
, hdr
->addr1
,
681 tx
->channel
->band
? 5 : 2))
685 * If we're associated with the sta at this point we know we can at
686 * least send the frame at the lowest bit rate.
688 rate_control_get_rate(tx
->sdata
, tx
->sta
, &txrc
);
690 if (unlikely(info
->control
.rates
[0].idx
< 0))
693 if (txrc
.reported_rate
.idx
< 0) {
694 txrc
.reported_rate
= info
->control
.rates
[0];
695 if (tx
->sta
&& ieee80211_is_data(hdr
->frame_control
))
696 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
698 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
700 if (unlikely(!info
->control
.rates
[0].count
))
701 info
->control
.rates
[0].count
= 1;
703 if (WARN_ON_ONCE((info
->control
.rates
[0].count
> 1) &&
704 (info
->flags
& IEEE80211_TX_CTL_NO_ACK
)))
705 info
->control
.rates
[0].count
= 1;
707 if (is_multicast_ether_addr(hdr
->addr1
)) {
709 * XXX: verify the rate is in the basic rateset
715 * set up the RTS/CTS rate as the fastest basic rate
716 * that is not faster than the data rate
718 * XXX: Should this check all retry rates?
720 if (!(info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
)) {
723 rate
= &sband
->bitrates
[info
->control
.rates
[0].idx
];
725 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
726 /* must be a basic rate */
727 if (!(tx
->sdata
->vif
.bss_conf
.basic_rates
& BIT(i
)))
729 /* must not be faster than the data rate */
730 if (sband
->bitrates
[i
].bitrate
> rate
->bitrate
)
733 if (sband
->bitrates
[baserate
].bitrate
<
734 sband
->bitrates
[i
].bitrate
)
738 info
->control
.rts_cts_rate_idx
= baserate
;
741 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
743 * make sure there's no valid rate following
744 * an invalid one, just in case drivers don't
745 * take the API seriously to stop at -1.
748 info
->control
.rates
[i
].idx
= -1;
751 if (info
->control
.rates
[i
].idx
< 0) {
757 * For now assume MCS is already set up correctly, this
760 if (info
->control
.rates
[i
].flags
& IEEE80211_TX_RC_MCS
) {
761 WARN_ON(info
->control
.rates
[i
].idx
> 76);
765 /* set up RTS protection if desired */
767 info
->control
.rates
[i
].flags
|=
768 IEEE80211_TX_RC_USE_RTS_CTS
;
771 if (WARN_ON_ONCE(info
->control
.rates
[i
].idx
>=
772 sband
->n_bitrates
)) {
773 info
->control
.rates
[i
].idx
= -1;
777 rate
= &sband
->bitrates
[info
->control
.rates
[i
].idx
];
779 /* set up short preamble */
780 if (short_preamble
&&
781 rate
->flags
& IEEE80211_RATE_SHORT_PREAMBLE
)
782 info
->control
.rates
[i
].flags
|=
783 IEEE80211_TX_RC_USE_SHORT_PREAMBLE
;
785 /* set up G protection */
786 if (!rts
&& tx
->sdata
->vif
.bss_conf
.use_cts_prot
&&
787 rate
->flags
& IEEE80211_RATE_ERP_G
)
788 info
->control
.rates
[i
].flags
|=
789 IEEE80211_TX_RC_USE_CTS_PROTECT
;
795 static ieee80211_tx_result debug_noinline
796 ieee80211_tx_h_sequence(struct ieee80211_tx_data
*tx
)
798 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
799 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
805 * Packet injection may want to control the sequence
806 * number, if we have no matching interface then we
807 * neither assign one ourselves nor ask the driver to.
809 if (unlikely(info
->control
.vif
->type
== NL80211_IFTYPE_MONITOR
))
812 if (unlikely(ieee80211_is_ctl(hdr
->frame_control
)))
815 if (ieee80211_hdrlen(hdr
->frame_control
) < 24)
818 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
822 * Anything but QoS data that has a sequence number field
823 * (is long enough) gets a sequence number from the global
826 if (!ieee80211_is_data_qos(hdr
->frame_control
)) {
827 /* driver should assign sequence number */
828 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
829 /* for pure STA mode without beacons, we can do it */
830 hdr
->seq_ctrl
= cpu_to_le16(tx
->sdata
->sequence_number
);
831 tx
->sdata
->sequence_number
+= 0x10;
836 * This should be true for injected/management frames only, for
837 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
838 * above since they are not QoS-data frames.
843 /* include per-STA, per-TID sequence counter */
845 qc
= ieee80211_get_qos_ctl(hdr
);
846 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
847 seq
= &tx
->sta
->tid_seq
[tid
];
849 hdr
->seq_ctrl
= cpu_to_le16(*seq
);
851 /* Increase the sequence number. */
852 *seq
= (*seq
+ 0x10) & IEEE80211_SCTL_SEQ
;
857 static int ieee80211_fragment(struct ieee80211_tx_data
*tx
,
858 struct sk_buff
*skb
, int hdrlen
,
861 struct ieee80211_local
*local
= tx
->local
;
862 struct ieee80211_tx_info
*info
;
864 int per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
865 int pos
= hdrlen
+ per_fragm
;
866 int rem
= skb
->len
- hdrlen
- per_fragm
;
868 if (WARN_ON(rem
< 0))
871 /* first fragment was already added to queue by caller */
874 int fraglen
= per_fragm
;
879 tmp
= dev_alloc_skb(local
->tx_headroom
+
881 IEEE80211_ENCRYPT_HEADROOM
+
882 IEEE80211_ENCRYPT_TAILROOM
);
886 __skb_queue_tail(&tx
->skbs
, tmp
);
888 skb_reserve(tmp
, local
->tx_headroom
+
889 IEEE80211_ENCRYPT_HEADROOM
);
890 /* copy control information */
891 memcpy(tmp
->cb
, skb
->cb
, sizeof(tmp
->cb
));
893 info
= IEEE80211_SKB_CB(tmp
);
894 info
->flags
&= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT
|
895 IEEE80211_TX_CTL_FIRST_FRAGMENT
);
898 info
->flags
|= IEEE80211_TX_CTL_MORE_FRAMES
;
900 skb_copy_queue_mapping(tmp
, skb
);
901 tmp
->priority
= skb
->priority
;
904 /* copy header and data */
905 memcpy(skb_put(tmp
, hdrlen
), skb
->data
, hdrlen
);
906 memcpy(skb_put(tmp
, fraglen
), skb
->data
+ pos
, fraglen
);
911 /* adjust first fragment's length */
912 skb
->len
= hdrlen
+ per_fragm
;
916 static ieee80211_tx_result debug_noinline
917 ieee80211_tx_h_fragment(struct ieee80211_tx_data
*tx
)
919 struct sk_buff
*skb
= tx
->skb
;
920 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
921 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
922 int frag_threshold
= tx
->local
->hw
.wiphy
->frag_threshold
;
926 /* no matter what happens, tx->skb moves to tx->skbs */
927 __skb_queue_tail(&tx
->skbs
, skb
);
930 if (info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)
933 if (tx
->local
->ops
->set_frag_threshold
)
937 * Warn when submitting a fragmented A-MPDU frame and drop it.
938 * This scenario is handled in ieee80211_tx_prepare but extra
939 * caution taken here as fragmented ampdu may cause Tx stop.
941 if (WARN_ON(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
944 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
946 /* internal error, why isn't DONTFRAG set? */
947 if (WARN_ON(skb
->len
+ FCS_LEN
<= frag_threshold
))
951 * Now fragment the frame. This will allocate all the fragments and
952 * chain them (using skb as the first fragment) to skb->next.
953 * During transmission, we will remove the successfully transmitted
954 * fragments from this list. When the low-level driver rejects one
955 * of the fragments then we will simply pretend to accept the skb
956 * but store it away as pending.
958 if (ieee80211_fragment(tx
, skb
, hdrlen
, frag_threshold
))
961 /* update duration/seq/flags of fragments */
964 skb_queue_walk(&tx
->skbs
, skb
) {
966 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
968 hdr
= (void *)skb
->data
;
969 info
= IEEE80211_SKB_CB(skb
);
971 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
972 hdr
->frame_control
|= morefrags
;
974 * No multi-rate retries for fragmented frames, that
975 * would completely throw off the NAV at other STAs.
977 info
->control
.rates
[1].idx
= -1;
978 info
->control
.rates
[2].idx
= -1;
979 info
->control
.rates
[3].idx
= -1;
980 info
->control
.rates
[4].idx
= -1;
981 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 5);
982 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
984 hdr
->frame_control
&= ~morefrags
;
987 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
994 static ieee80211_tx_result debug_noinline
995 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
1002 tx
->sta
->tx_packets
++;
1003 skb_queue_walk(&tx
->skbs
, skb
) {
1004 tx
->sta
->tx_fragments
++;
1005 tx
->sta
->tx_bytes
+= skb
->len
;
1011 static ieee80211_tx_result debug_noinline
1012 ieee80211_tx_h_encrypt(struct ieee80211_tx_data
*tx
)
1017 switch (tx
->key
->conf
.cipher
) {
1018 case WLAN_CIPHER_SUITE_WEP40
:
1019 case WLAN_CIPHER_SUITE_WEP104
:
1020 return ieee80211_crypto_wep_encrypt(tx
);
1021 case WLAN_CIPHER_SUITE_TKIP
:
1022 return ieee80211_crypto_tkip_encrypt(tx
);
1023 case WLAN_CIPHER_SUITE_CCMP
:
1024 return ieee80211_crypto_ccmp_encrypt(tx
);
1025 case WLAN_CIPHER_SUITE_AES_CMAC
:
1026 return ieee80211_crypto_aes_cmac_encrypt(tx
);
1028 return ieee80211_crypto_hw_encrypt(tx
);
1034 static ieee80211_tx_result debug_noinline
1035 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data
*tx
)
1037 struct sk_buff
*skb
;
1038 struct ieee80211_hdr
*hdr
;
1042 skb_queue_walk(&tx
->skbs
, skb
) {
1043 hdr
= (void *) skb
->data
;
1044 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
)))
1045 break; /* must not overwrite AID */
1046 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1047 struct sk_buff
*next
= skb_queue_next(&tx
->skbs
, skb
);
1048 next_len
= next
->len
;
1051 group_addr
= is_multicast_ether_addr(hdr
->addr1
);
1054 ieee80211_duration(tx
, skb
, group_addr
, next_len
);
1060 /* actual transmit path */
1062 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data
*tx
,
1063 struct sk_buff
*skb
,
1064 struct ieee80211_tx_info
*info
,
1065 struct tid_ampdu_tx
*tid_tx
,
1068 bool queued
= false;
1069 bool reset_agg_timer
= false;
1070 struct sk_buff
*purge_skb
= NULL
;
1072 if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1073 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1074 reset_agg_timer
= true;
1075 } else if (test_bit(HT_AGG_STATE_WANT_START
, &tid_tx
->state
)) {
1077 * nothing -- this aggregation session is being started
1078 * but that might still fail with the driver
1081 spin_lock(&tx
->sta
->lock
);
1083 * Need to re-check now, because we may get here
1085 * 1) in the window during which the setup is actually
1086 * already done, but not marked yet because not all
1087 * packets are spliced over to the driver pending
1088 * queue yet -- if this happened we acquire the lock
1089 * either before or after the splice happens, but
1090 * need to recheck which of these cases happened.
1092 * 2) during session teardown, if the OPERATIONAL bit
1093 * was cleared due to the teardown but the pointer
1094 * hasn't been assigned NULL yet (or we loaded it
1095 * before it was assigned) -- in this case it may
1096 * now be NULL which means we should just let the
1097 * packet pass through because splicing the frames
1098 * back is already done.
1100 tid_tx
= rcu_dereference_protected_tid_tx(tx
->sta
, tid
);
1103 /* do nothing, let packet pass through */
1104 } else if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1105 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1106 reset_agg_timer
= true;
1109 info
->control
.vif
= &tx
->sdata
->vif
;
1110 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1111 __skb_queue_tail(&tid_tx
->pending
, skb
);
1112 if (skb_queue_len(&tid_tx
->pending
) > STA_MAX_TX_BUFFER
)
1113 purge_skb
= __skb_dequeue(&tid_tx
->pending
);
1115 spin_unlock(&tx
->sta
->lock
);
1118 dev_kfree_skb(purge_skb
);
1121 /* reset session timer */
1122 if (reset_agg_timer
&& tid_tx
->timeout
)
1123 tid_tx
->last_tx
= jiffies
;
1131 static ieee80211_tx_result
1132 ieee80211_tx_prepare(struct ieee80211_sub_if_data
*sdata
,
1133 struct ieee80211_tx_data
*tx
,
1134 struct sk_buff
*skb
)
1136 struct ieee80211_local
*local
= sdata
->local
;
1137 struct ieee80211_hdr
*hdr
;
1138 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1142 memset(tx
, 0, sizeof(*tx
));
1146 tx
->channel
= local
->hw
.conf
.channel
;
1147 __skb_queue_head_init(&tx
->skbs
);
1150 * If this flag is set to true anywhere, and we get here,
1151 * we are doing the needed processing, so remove the flag
1154 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1156 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1158 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1159 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1160 if (!tx
->sta
&& sdata
->dev
->ieee80211_ptr
->use_4addr
)
1162 } else if (info
->flags
& IEEE80211_TX_CTL_INJECTED
||
1163 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1164 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1167 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1169 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1170 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1171 (local
->hw
.flags
& IEEE80211_HW_AMPDU_AGGREGATION
) &&
1172 !(local
->hw
.flags
& IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
)) {
1173 struct tid_ampdu_tx
*tid_tx
;
1175 qc
= ieee80211_get_qos_ctl(hdr
);
1176 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
1178 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1182 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1185 if (unlikely(queued
))
1190 if (is_multicast_ether_addr(hdr
->addr1
)) {
1191 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1192 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1194 tx
->flags
|= IEEE80211_TX_UNICAST
;
1196 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1197 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1198 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1199 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1200 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1204 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1205 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
))
1206 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1208 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1213 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1214 struct ieee80211_vif
*vif
,
1215 struct ieee80211_sta
*sta
,
1216 struct sk_buff_head
*skbs
,
1219 struct sk_buff
*skb
, *tmp
;
1220 unsigned long flags
;
1222 skb_queue_walk_safe(skbs
, skb
, tmp
) {
1223 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1224 int q
= info
->hw_queue
;
1226 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1227 if (WARN_ON_ONCE(q
>= local
->hw
.queues
)) {
1228 __skb_unlink(skb
, skbs
);
1234 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1235 if (local
->queue_stop_reasons
[q
] ||
1236 (!txpending
&& !skb_queue_empty(&local
->pending
[q
]))) {
1238 * Since queue is stopped, queue up frames for later
1239 * transmission from the tx-pending tasklet when the
1240 * queue is woken again.
1243 skb_queue_splice_init(skbs
, &local
->pending
[q
]);
1245 skb_queue_splice_tail_init(skbs
,
1246 &local
->pending
[q
]);
1248 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1252 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1254 info
->control
.vif
= vif
;
1255 info
->control
.sta
= sta
;
1257 __skb_unlink(skb
, skbs
);
1265 * Returns false if the frame couldn't be transmitted but was queued instead.
1267 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1268 struct sk_buff_head
*skbs
, int led_len
,
1269 struct sta_info
*sta
, bool txpending
)
1271 struct ieee80211_tx_info
*info
;
1272 struct ieee80211_sub_if_data
*sdata
;
1273 struct ieee80211_vif
*vif
;
1274 struct ieee80211_sta
*pubsta
;
1275 struct sk_buff
*skb
;
1279 if (WARN_ON(skb_queue_empty(skbs
)))
1282 skb
= skb_peek(skbs
);
1283 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1284 info
= IEEE80211_SKB_CB(skb
);
1285 sdata
= vif_to_sdata(info
->control
.vif
);
1286 if (sta
&& !sta
->uploaded
)
1294 switch (sdata
->vif
.type
) {
1295 case NL80211_IFTYPE_MONITOR
:
1296 sdata
= rcu_dereference(local
->monitor_sdata
);
1300 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1301 } else if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
1307 case NL80211_IFTYPE_AP_VLAN
:
1308 sdata
= container_of(sdata
->bss
,
1309 struct ieee80211_sub_if_data
, u
.ap
);
1316 if (local
->ops
->tx_frags
)
1317 drv_tx_frags(local
, vif
, pubsta
, skbs
);
1319 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1322 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1323 ieee80211_led_tx(local
, 1);
1325 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1331 * Invoke TX handlers, return 0 on success and non-zero if the
1332 * frame was dropped or queued.
1334 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1336 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1337 ieee80211_tx_result res
= TX_DROP
;
1339 #define CALL_TXH(txh) \
1342 if (res != TX_CONTINUE) \
1346 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1347 CALL_TXH(ieee80211_tx_h_check_assoc
);
1348 CALL_TXH(ieee80211_tx_h_ps_buf
);
1349 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1350 CALL_TXH(ieee80211_tx_h_select_key
);
1351 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1352 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1354 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1355 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1360 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1361 CALL_TXH(ieee80211_tx_h_sequence
);
1362 CALL_TXH(ieee80211_tx_h_fragment
);
1363 /* handlers after fragment must be aware of tx info fragmentation! */
1364 CALL_TXH(ieee80211_tx_h_stats
);
1365 CALL_TXH(ieee80211_tx_h_encrypt
);
1366 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1367 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1371 if (unlikely(res
== TX_DROP
)) {
1372 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1374 dev_kfree_skb(tx
->skb
);
1376 __skb_queue_purge(&tx
->skbs
);
1378 } else if (unlikely(res
== TX_QUEUED
)) {
1379 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1387 * Returns false if the frame couldn't be transmitted but was queued instead.
1389 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1390 struct sk_buff
*skb
, bool txpending
)
1392 struct ieee80211_local
*local
= sdata
->local
;
1393 struct ieee80211_tx_data tx
;
1394 ieee80211_tx_result res_prepare
;
1395 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1399 if (unlikely(skb
->len
< 10)) {
1406 /* initialises tx */
1408 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, skb
);
1410 if (unlikely(res_prepare
== TX_DROP
)) {
1413 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1417 tx
.channel
= local
->hw
.conf
.channel
;
1418 info
->band
= tx
.channel
->band
;
1420 /* set up hw_queue value early */
1421 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1422 !(local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
))
1424 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1426 if (!invoke_tx_handlers(&tx
))
1427 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1434 /* device xmit handlers */
1436 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1437 struct sk_buff
*skb
,
1438 int head_need
, bool may_encrypt
)
1440 struct ieee80211_local
*local
= sdata
->local
;
1443 if (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
) {
1444 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1445 tail_need
-= skb_tailroom(skb
);
1446 tail_need
= max_t(int, tail_need
, 0);
1449 if (skb_cloned(skb
))
1450 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1451 else if (head_need
|| tail_need
)
1452 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1456 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1457 wiphy_debug(local
->hw
.wiphy
,
1458 "failed to reallocate TX buffer\n");
1465 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
)
1467 struct ieee80211_local
*local
= sdata
->local
;
1468 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1469 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1475 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1477 headroom
= local
->tx_headroom
;
1479 headroom
+= IEEE80211_ENCRYPT_HEADROOM
;
1480 headroom
-= skb_headroom(skb
);
1481 headroom
= max_t(int, 0, headroom
);
1483 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1489 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1490 info
->control
.vif
= &sdata
->vif
;
1492 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
1493 ieee80211_is_data(hdr
->frame_control
) &&
1494 !is_multicast_ether_addr(hdr
->addr1
) &&
1495 mesh_nexthop_resolve(skb
, sdata
)) {
1496 /* skb queued: don't free */
1501 ieee80211_set_qos_hdr(sdata
, skb
);
1502 ieee80211_tx(sdata
, skb
, false);
1506 static bool ieee80211_parse_tx_radiotap(struct sk_buff
*skb
)
1508 struct ieee80211_radiotap_iterator iterator
;
1509 struct ieee80211_radiotap_header
*rthdr
=
1510 (struct ieee80211_radiotap_header
*) skb
->data
;
1511 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1512 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
1516 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1517 IEEE80211_TX_CTL_DONTFRAG
;
1520 * for every radiotap entry that is present
1521 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1522 * entries present, or -EINVAL on error)
1526 ret
= ieee80211_radiotap_iterator_next(&iterator
);
1531 /* see if this argument is something we can use */
1532 switch (iterator
.this_arg_index
) {
1534 * You must take care when dereferencing iterator.this_arg
1535 * for multibyte types... the pointer is not aligned. Use
1536 * get_unaligned((type *)iterator.this_arg) to dereference
1537 * iterator.this_arg for type "type" safely on all arches.
1539 case IEEE80211_RADIOTAP_FLAGS
:
1540 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
1542 * this indicates that the skb we have been
1543 * handed has the 32-bit FCS CRC at the end...
1544 * we should react to that by snipping it off
1545 * because it will be recomputed and added
1548 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
1551 skb_trim(skb
, skb
->len
- FCS_LEN
);
1553 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
1554 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1555 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
1556 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
1559 case IEEE80211_RADIOTAP_TX_FLAGS
:
1560 txflags
= get_unaligned_le16(iterator
.this_arg
);
1561 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
1562 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1566 * Please update the file
1567 * Documentation/networking/mac80211-injection.txt
1568 * when parsing new fields here.
1576 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
1580 * remove the radiotap header
1581 * iterator->_max_length was sanity-checked against
1582 * skb->len by iterator init
1584 skb_pull(skb
, iterator
._max_length
);
1589 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
1590 struct net_device
*dev
)
1592 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1593 struct ieee80211_channel
*chan
= local
->hw
.conf
.channel
;
1594 struct ieee80211_radiotap_header
*prthdr
=
1595 (struct ieee80211_radiotap_header
*)skb
->data
;
1596 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1597 struct ieee80211_hdr
*hdr
;
1598 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
1603 * Frame injection is not allowed if beaconing is not allowed
1604 * or if we need radar detection. Beaconing is usually not allowed when
1605 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1606 * Passive scan is also used in world regulatory domains where
1607 * your country is not known and as such it should be treated as
1608 * NO TX unless the channel is explicitly allowed in which case
1609 * your current regulatory domain would not have the passive scan
1612 * Since AP mode uses monitor interfaces to inject/TX management
1613 * frames we can make AP mode the exception to this rule once it
1614 * supports radar detection as its implementation can deal with
1615 * radar detection by itself. We can do that later by adding a
1616 * monitor flag interfaces used for AP support.
1618 if ((chan
->flags
& (IEEE80211_CHAN_NO_IBSS
| IEEE80211_CHAN_RADAR
|
1619 IEEE80211_CHAN_PASSIVE_SCAN
)))
1622 /* check for not even having the fixed radiotap header part */
1623 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
1624 goto fail
; /* too short to be possibly valid */
1626 /* is it a header version we can trust to find length from? */
1627 if (unlikely(prthdr
->it_version
))
1628 goto fail
; /* only version 0 is supported */
1630 /* then there must be a radiotap header with a length we can use */
1631 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
1633 /* does the skb contain enough to deliver on the alleged length? */
1634 if (unlikely(skb
->len
< len_rthdr
))
1635 goto fail
; /* skb too short for claimed rt header extent */
1638 * fix up the pointers accounting for the radiotap
1639 * header still being in there. We are being given
1640 * a precooked IEEE80211 header so no need for
1643 skb_set_mac_header(skb
, len_rthdr
);
1645 * these are just fixed to the end of the rt area since we
1646 * don't have any better information and at this point, nobody cares
1648 skb_set_network_header(skb
, len_rthdr
);
1649 skb_set_transport_header(skb
, len_rthdr
);
1651 if (skb
->len
< len_rthdr
+ 2)
1654 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
1655 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1657 if (skb
->len
< len_rthdr
+ hdrlen
)
1661 * Initialize skb->protocol if the injected frame is a data frame
1662 * carrying a rfc1042 header
1664 if (ieee80211_is_data(hdr
->frame_control
) &&
1665 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
1666 u8
*payload
= (u8
*)hdr
+ hdrlen
;
1668 if (ether_addr_equal(payload
, rfc1042_header
))
1669 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
1673 memset(info
, 0, sizeof(*info
));
1675 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1676 IEEE80211_TX_CTL_INJECTED
;
1678 /* process and remove the injection radiotap header */
1679 if (!ieee80211_parse_tx_radiotap(skb
))
1685 * We process outgoing injected frames that have a local address
1686 * we handle as though they are non-injected frames.
1687 * This code here isn't entirely correct, the local MAC address
1688 * isn't always enough to find the interface to use; for proper
1689 * VLAN/WDS support we will need a different mechanism (which
1690 * likely isn't going to be monitor interfaces).
1692 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1694 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
1695 if (!ieee80211_sdata_running(tmp_sdata
))
1697 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1698 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1699 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
1701 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
1707 ieee80211_xmit(sdata
, skb
);
1710 return NETDEV_TX_OK
;
1714 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
1718 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1719 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1720 * @skb: packet to be sent
1721 * @dev: incoming interface
1723 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1724 * not be freed, and caller is responsible for either retrying later or freeing
1727 * This function takes in an Ethernet header and encapsulates it with suitable
1728 * IEEE 802.11 header based on which interface the packet is coming in. The
1729 * encapsulated packet will then be passed to master interface, wlan#.11, for
1730 * transmission (through low-level driver).
1732 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
1733 struct net_device
*dev
)
1735 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1736 struct ieee80211_local
*local
= sdata
->local
;
1737 struct ieee80211_tx_info
*info
;
1738 int ret
= NETDEV_TX_BUSY
, head_need
;
1739 u16 ethertype
, hdrlen
, meshhdrlen
= 0;
1741 struct ieee80211_hdr hdr
;
1742 struct ieee80211s_hdr mesh_hdr __maybe_unused
;
1743 struct mesh_path __maybe_unused
*mppath
= NULL
;
1744 const u8
*encaps_data
;
1745 int encaps_len
, skip_header_bytes
;
1747 struct sta_info
*sta
= NULL
;
1748 bool wme_sta
= false, authorized
= false, tdls_auth
= false;
1749 bool tdls_direct
= false;
1754 if (unlikely(skb
->len
< ETH_HLEN
)) {
1759 /* convert Ethernet header to proper 802.11 header (based on
1760 * operation mode) */
1761 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
1762 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
1764 switch (sdata
->vif
.type
) {
1765 case NL80211_IFTYPE_AP_VLAN
:
1767 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1769 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1771 memcpy(hdr
.addr1
, sta
->sta
.addr
, ETH_ALEN
);
1772 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1773 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1774 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1776 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1777 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1783 case NL80211_IFTYPE_AP
:
1784 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
1786 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1787 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1788 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1791 case NL80211_IFTYPE_WDS
:
1792 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1794 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
1795 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1796 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1797 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1800 #ifdef CONFIG_MAC80211_MESH
1801 case NL80211_IFTYPE_MESH_POINT
:
1802 if (!sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
) {
1803 /* Do not send frames with mesh_ttl == 0 */
1804 sdata
->u
.mesh
.mshstats
.dropped_frames_ttl
++;
1809 if (!is_multicast_ether_addr(skb
->data
))
1810 mppath
= mpp_path_lookup(skb
->data
, sdata
);
1813 * Use address extension if it is a packet from
1814 * another interface or if we know the destination
1815 * is being proxied by a portal (i.e. portal address
1816 * differs from proxied address)
1818 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
1819 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
1820 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1821 skb
->data
, skb
->data
+ ETH_ALEN
);
1823 meshhdrlen
= ieee80211_new_mesh_header(&mesh_hdr
,
1826 int is_mesh_mcast
= 1;
1829 if (is_multicast_ether_addr(skb
->data
))
1830 /* DA TA mSA AE:SA */
1831 mesh_da
= skb
->data
;
1833 static const u8 bcast
[ETH_ALEN
] =
1834 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
1836 /* RA TA mDA mSA AE:DA SA */
1837 mesh_da
= mppath
->mpp
;
1840 /* DA TA mSA AE:SA */
1844 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1845 mesh_da
, sdata
->vif
.addr
);
1849 ieee80211_new_mesh_header(&mesh_hdr
,
1851 skb
->data
+ ETH_ALEN
,
1855 ieee80211_new_mesh_header(&mesh_hdr
,
1858 skb
->data
+ ETH_ALEN
);
1863 case NL80211_IFTYPE_STATION
:
1864 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
1865 bool tdls_peer
= false;
1868 sta
= sta_info_get(sdata
, skb
->data
);
1870 authorized
= test_sta_flag(sta
,
1871 WLAN_STA_AUTHORIZED
);
1872 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1873 tdls_peer
= test_sta_flag(sta
,
1874 WLAN_STA_TDLS_PEER
);
1875 tdls_auth
= test_sta_flag(sta
,
1876 WLAN_STA_TDLS_PEER_AUTH
);
1881 * If the TDLS link is enabled, send everything
1882 * directly. Otherwise, allow TDLS setup frames
1883 * to be transmitted indirectly.
1885 tdls_direct
= tdls_peer
&& (tdls_auth
||
1886 !(ethertype
== ETH_P_TDLS
&& skb
->len
> 14 &&
1887 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
));
1891 /* link during setup - throw out frames to peer */
1898 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1899 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1900 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1902 } else if (sdata
->u
.mgd
.use_4addr
&&
1903 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
1904 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
1905 IEEE80211_FCTL_TODS
);
1907 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1908 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1909 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1910 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1913 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
1915 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1916 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1917 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1921 case NL80211_IFTYPE_ADHOC
:
1923 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1924 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1925 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
1934 * There's no need to try to look up the destination
1935 * if it is a multicast address (which can only happen
1938 multicast
= is_multicast_ether_addr(hdr
.addr1
);
1941 sta
= sta_info_get(sdata
, hdr
.addr1
);
1943 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1944 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1949 /* For mesh, the use of the QoS header is mandatory */
1950 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1953 /* receiver and we are QoS enabled, use a QoS type frame */
1954 if (wme_sta
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
) {
1955 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
1960 * Drop unicast frames to unauthorised stations unless they are
1961 * EAPOL frames from the local station.
1963 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
1964 !is_multicast_ether_addr(hdr
.addr1
) && !authorized
&&
1965 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
1966 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
1967 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1968 if (net_ratelimit())
1969 printk(KERN_DEBUG
"%s: dropped frame to %pM"
1970 " (unauthorized port)\n", dev
->name
,
1974 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
1980 if (unlikely(!multicast
&& skb
->sk
&&
1981 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
1982 struct sk_buff
*orig_skb
= skb
;
1984 skb
= skb_clone(skb
, GFP_ATOMIC
);
1986 unsigned long flags
;
1989 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
1990 r
= idr_get_new_above(&local
->ack_status_frames
,
1993 idr_pre_get(&local
->ack_status_frames
,
1995 r
= idr_get_new_above(&local
->ack_status_frames
,
1998 if (WARN_ON(!id
) || id
> 0xffff) {
1999 idr_remove(&local
->ack_status_frames
, id
);
2002 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2006 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2007 } else if (skb_shared(skb
)) {
2008 kfree_skb(orig_skb
);
2014 /* couldn't clone -- lose tx status ... */
2020 * If the skb is shared we need to obtain our own copy.
2022 if (skb_shared(skb
)) {
2023 struct sk_buff
*tmp_skb
= skb
;
2025 /* can't happen -- skb is a clone if info_id != 0 */
2028 skb
= skb_clone(skb
, GFP_ATOMIC
);
2037 hdr
.frame_control
= fc
;
2038 hdr
.duration_id
= 0;
2041 skip_header_bytes
= ETH_HLEN
;
2042 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2043 encaps_data
= bridge_tunnel_header
;
2044 encaps_len
= sizeof(bridge_tunnel_header
);
2045 skip_header_bytes
-= 2;
2046 } else if (ethertype
>= 0x600) {
2047 encaps_data
= rfc1042_header
;
2048 encaps_len
= sizeof(rfc1042_header
);
2049 skip_header_bytes
-= 2;
2055 nh_pos
= skb_network_header(skb
) - skb
->data
;
2056 h_pos
= skb_transport_header(skb
) - skb
->data
;
2058 skb_pull(skb
, skip_header_bytes
);
2059 nh_pos
-= skip_header_bytes
;
2060 h_pos
-= skip_header_bytes
;
2062 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2065 * So we need to modify the skb header and hence need a copy of
2066 * that. The head_need variable above doesn't, so far, include
2067 * the needed header space that we don't need right away. If we
2068 * can, then we don't reallocate right now but only after the
2069 * frame arrives at the master device (if it does...)
2071 * If we cannot, however, then we will reallocate to include all
2072 * the ever needed space. Also, if we need to reallocate it anyway,
2073 * make it big enough for everything we may ever need.
2076 if (head_need
> 0 || skb_cloned(skb
)) {
2077 head_need
+= IEEE80211_ENCRYPT_HEADROOM
;
2078 head_need
+= local
->tx_headroom
;
2079 head_need
= max_t(int, 0, head_need
);
2080 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true))
2085 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2086 nh_pos
+= encaps_len
;
2087 h_pos
+= encaps_len
;
2090 #ifdef CONFIG_MAC80211_MESH
2091 if (meshhdrlen
> 0) {
2092 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2093 nh_pos
+= meshhdrlen
;
2094 h_pos
+= meshhdrlen
;
2098 if (ieee80211_is_data_qos(fc
)) {
2099 __le16
*qos_control
;
2101 qos_control
= (__le16
*) skb_push(skb
, 2);
2102 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2104 * Maybe we could actually set some fields here, for now just
2105 * initialise to zero to indicate no special operation.
2109 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2114 dev
->stats
.tx_packets
++;
2115 dev
->stats
.tx_bytes
+= skb
->len
;
2117 /* Update skb pointers to various headers since this modified frame
2118 * is going to go through Linux networking code that may potentially
2119 * need things like pointer to IP header. */
2120 skb_set_mac_header(skb
, 0);
2121 skb_set_network_header(skb
, nh_pos
);
2122 skb_set_transport_header(skb
, h_pos
);
2124 info
= IEEE80211_SKB_CB(skb
);
2125 memset(info
, 0, sizeof(*info
));
2127 dev
->trans_start
= jiffies
;
2129 info
->flags
= info_flags
;
2130 info
->ack_frame_id
= info_id
;
2132 ieee80211_xmit(sdata
, skb
);
2134 return NETDEV_TX_OK
;
2137 if (ret
== NETDEV_TX_OK
)
2145 * ieee80211_clear_tx_pending may not be called in a context where
2146 * it is possible that it packets could come in again.
2148 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
2152 for (i
= 0; i
< local
->hw
.queues
; i
++)
2153 skb_queue_purge(&local
->pending
[i
]);
2157 * Returns false if the frame couldn't be transmitted but was queued instead,
2158 * which in this case means re-queued -- take as an indication to stop sending
2159 * more pending frames.
2161 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
2162 struct sk_buff
*skb
)
2164 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2165 struct ieee80211_sub_if_data
*sdata
;
2166 struct sta_info
*sta
;
2167 struct ieee80211_hdr
*hdr
;
2170 sdata
= vif_to_sdata(info
->control
.vif
);
2172 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
2173 result
= ieee80211_tx(sdata
, skb
, true);
2175 struct sk_buff_head skbs
;
2177 __skb_queue_head_init(&skbs
);
2178 __skb_queue_tail(&skbs
, skb
);
2180 hdr
= (struct ieee80211_hdr
*)skb
->data
;
2181 sta
= sta_info_get(sdata
, hdr
->addr1
);
2183 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
2190 * Transmit all pending packets. Called from tasklet.
2192 void ieee80211_tx_pending(unsigned long data
)
2194 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
2195 unsigned long flags
;
2201 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
2202 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2204 * If queue is stopped by something other than due to pending
2205 * frames, or we have no pending frames, proceed to next queue.
2207 if (local
->queue_stop_reasons
[i
] ||
2208 skb_queue_empty(&local
->pending
[i
]))
2211 while (!skb_queue_empty(&local
->pending
[i
])) {
2212 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
2213 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2215 if (WARN_ON(!info
->control
.vif
)) {
2220 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
2223 txok
= ieee80211_tx_pending_skb(local
, skb
);
2224 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
2230 if (skb_queue_empty(&local
->pending
[i
]))
2231 ieee80211_propagate_queue_wake(local
, i
);
2233 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
2238 /* functions for drivers to get certain frames */
2240 static void ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2241 struct ieee80211_if_ap
*bss
,
2242 struct sk_buff
*skb
,
2243 struct beacon_data
*beacon
)
2247 int i
, have_bits
= 0, n1
, n2
;
2249 /* Generate bitmap for TIM only if there are any STAs in power save
2251 if (atomic_read(&bss
->num_sta_ps
) > 0)
2252 /* in the hope that this is faster than
2253 * checking byte-for-byte */
2254 have_bits
= !bitmap_empty((unsigned long*)bss
->tim
,
2255 IEEE80211_MAX_AID
+1);
2257 if (bss
->dtim_count
== 0)
2258 bss
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
2262 tim
= pos
= (u8
*) skb_put(skb
, 6);
2263 *pos
++ = WLAN_EID_TIM
;
2265 *pos
++ = bss
->dtim_count
;
2266 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
2268 if (bss
->dtim_count
== 0 && !skb_queue_empty(&bss
->ps_bc_buf
))
2271 bss
->dtim_bc_mc
= aid0
== 1;
2274 /* Find largest even number N1 so that bits numbered 1 through
2275 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2276 * (N2 + 1) x 8 through 2007 are 0. */
2278 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
2285 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
2292 /* Bitmap control */
2294 /* Part Virt Bitmap */
2295 skb_put(skb
, n2
- n1
);
2296 memcpy(pos
, bss
->tim
+ n1
, n2
- n1
+ 1);
2298 tim
[1] = n2
- n1
+ 4;
2300 *pos
++ = aid0
; /* Bitmap control */
2301 *pos
++ = 0; /* Part Virt Bitmap */
2305 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
2306 struct ieee80211_vif
*vif
,
2307 u16
*tim_offset
, u16
*tim_length
)
2309 struct ieee80211_local
*local
= hw_to_local(hw
);
2310 struct sk_buff
*skb
= NULL
;
2311 struct ieee80211_tx_info
*info
;
2312 struct ieee80211_sub_if_data
*sdata
= NULL
;
2313 struct ieee80211_if_ap
*ap
= NULL
;
2314 struct beacon_data
*beacon
;
2315 struct ieee80211_supported_band
*sband
;
2316 enum ieee80211_band band
= local
->hw
.conf
.channel
->band
;
2317 struct ieee80211_tx_rate_control txrc
;
2319 sband
= local
->hw
.wiphy
->bands
[band
];
2323 sdata
= vif_to_sdata(vif
);
2325 if (!ieee80211_sdata_running(sdata
))
2333 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2335 beacon
= rcu_dereference(ap
->beacon
);
2338 * headroom, head length,
2339 * tail length and maximum TIM length
2341 skb
= dev_alloc_skb(local
->tx_headroom
+
2343 beacon
->tail_len
+ 256);
2347 skb_reserve(skb
, local
->tx_headroom
);
2348 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
2352 * Not very nice, but we want to allow the driver to call
2353 * ieee80211_beacon_get() as a response to the set_tim()
2354 * callback. That, however, is already invoked under the
2355 * sta_lock to guarantee consistent and race-free update
2356 * of the tim bitmap in mac80211 and the driver.
2358 if (local
->tim_in_locked_section
) {
2359 ieee80211_beacon_add_tim(sdata
, ap
, skb
,
2362 unsigned long flags
;
2364 spin_lock_irqsave(&local
->tim_lock
, flags
);
2365 ieee80211_beacon_add_tim(sdata
, ap
, skb
,
2367 spin_unlock_irqrestore(&local
->tim_lock
, flags
);
2371 *tim_offset
= beacon
->head_len
;
2373 *tim_length
= skb
->len
- beacon
->head_len
;
2376 memcpy(skb_put(skb
, beacon
->tail_len
),
2377 beacon
->tail
, beacon
->tail_len
);
2380 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2381 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2382 struct ieee80211_hdr
*hdr
;
2383 struct sk_buff
*presp
= rcu_dereference(ifibss
->presp
);
2388 skb
= skb_copy(presp
, GFP_ATOMIC
);
2392 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2393 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2394 IEEE80211_STYPE_BEACON
);
2395 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2396 struct ieee80211_mgmt
*mgmt
;
2397 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2399 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.beacon
) +
2400 sizeof(mgmt
->u
.beacon
);
2402 #ifdef CONFIG_MAC80211_MESH
2403 if (!sdata
->u
.mesh
.mesh_id_len
)
2407 if (ifmsh
->sync_ops
)
2408 ifmsh
->sync_ops
->adjust_tbtt(
2411 skb
= dev_alloc_skb(local
->tx_headroom
+
2414 2 + 8 + /* supported rates */
2415 2 + 3 + /* DS params */
2416 2 + (IEEE80211_MAX_SUPP_RATES
- 8) +
2417 2 + sizeof(struct ieee80211_ht_cap
) +
2418 2 + sizeof(struct ieee80211_ht_operation
) +
2419 2 + sdata
->u
.mesh
.mesh_id_len
+
2420 2 + sizeof(struct ieee80211_meshconf_ie
) +
2421 sdata
->u
.mesh
.ie_len
);
2425 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2426 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, hdr_len
);
2427 memset(mgmt
, 0, hdr_len
);
2428 mgmt
->frame_control
=
2429 cpu_to_le16(IEEE80211_FTYPE_MGMT
| IEEE80211_STYPE_BEACON
);
2430 memset(mgmt
->da
, 0xff, ETH_ALEN
);
2431 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2432 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
2433 mgmt
->u
.beacon
.beacon_int
=
2434 cpu_to_le16(sdata
->vif
.bss_conf
.beacon_int
);
2435 mgmt
->u
.beacon
.capab_info
|= cpu_to_le16(
2436 sdata
->u
.mesh
.security
? WLAN_CAPABILITY_PRIVACY
: 0);
2438 pos
= skb_put(skb
, 2);
2439 *pos
++ = WLAN_EID_SSID
;
2442 if (ieee80211_add_srates_ie(&sdata
->vif
, skb
, true) ||
2443 mesh_add_ds_params_ie(skb
, sdata
) ||
2444 ieee80211_add_ext_srates_ie(&sdata
->vif
, skb
, true) ||
2445 mesh_add_rsn_ie(skb
, sdata
) ||
2446 mesh_add_ht_cap_ie(skb
, sdata
) ||
2447 mesh_add_ht_oper_ie(skb
, sdata
) ||
2448 mesh_add_meshid_ie(skb
, sdata
) ||
2449 mesh_add_meshconf_ie(skb
, sdata
) ||
2450 mesh_add_vendor_ies(skb
, sdata
)) {
2451 pr_err("o11s: couldn't add ies!\n");
2459 info
= IEEE80211_SKB_CB(skb
);
2461 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
2462 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
2465 memset(&txrc
, 0, sizeof(txrc
));
2468 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
2470 txrc
.reported_rate
.idx
= -1;
2471 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
2472 if (txrc
.rate_idx_mask
== (1 << sband
->n_bitrates
) - 1)
2473 txrc
.max_rate_idx
= -1;
2475 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
2476 memcpy(txrc
.rate_idx_mcs_mask
, sdata
->rc_rateidx_mcs_mask
[band
],
2477 sizeof(txrc
.rate_idx_mcs_mask
));
2479 rate_control_get_rate(sdata
, NULL
, &txrc
);
2481 info
->control
.vif
= vif
;
2483 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
2484 IEEE80211_TX_CTL_ASSIGN_SEQ
|
2485 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
2490 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
2492 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
2493 struct ieee80211_vif
*vif
)
2495 struct ieee80211_if_ap
*ap
= NULL
;
2496 struct sk_buff
*presp
= NULL
, *skb
= NULL
;
2497 struct ieee80211_hdr
*hdr
;
2498 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2500 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
2506 presp
= rcu_dereference(ap
->probe_resp
);
2510 skb
= skb_copy(presp
, GFP_ATOMIC
);
2514 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2515 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
2521 EXPORT_SYMBOL(ieee80211_proberesp_get
);
2523 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
2524 struct ieee80211_vif
*vif
)
2526 struct ieee80211_sub_if_data
*sdata
;
2527 struct ieee80211_if_managed
*ifmgd
;
2528 struct ieee80211_pspoll
*pspoll
;
2529 struct ieee80211_local
*local
;
2530 struct sk_buff
*skb
;
2532 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2535 sdata
= vif_to_sdata(vif
);
2536 ifmgd
= &sdata
->u
.mgd
;
2537 local
= sdata
->local
;
2539 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
2543 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2545 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
2546 memset(pspoll
, 0, sizeof(*pspoll
));
2547 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
2548 IEEE80211_STYPE_PSPOLL
);
2549 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
2551 /* aid in PS-Poll has its two MSBs each set to 1 */
2552 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
2554 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
2555 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
2559 EXPORT_SYMBOL(ieee80211_pspoll_get
);
2561 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
2562 struct ieee80211_vif
*vif
)
2564 struct ieee80211_hdr_3addr
*nullfunc
;
2565 struct ieee80211_sub_if_data
*sdata
;
2566 struct ieee80211_if_managed
*ifmgd
;
2567 struct ieee80211_local
*local
;
2568 struct sk_buff
*skb
;
2570 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2573 sdata
= vif_to_sdata(vif
);
2574 ifmgd
= &sdata
->u
.mgd
;
2575 local
= sdata
->local
;
2577 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*nullfunc
));
2581 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2583 nullfunc
= (struct ieee80211_hdr_3addr
*) skb_put(skb
,
2585 memset(nullfunc
, 0, sizeof(*nullfunc
));
2586 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
2587 IEEE80211_STYPE_NULLFUNC
|
2588 IEEE80211_FCTL_TODS
);
2589 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
2590 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
2591 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
2595 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
2597 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
2598 struct ieee80211_vif
*vif
,
2599 const u8
*ssid
, size_t ssid_len
,
2600 const u8
*ie
, size_t ie_len
)
2602 struct ieee80211_sub_if_data
*sdata
;
2603 struct ieee80211_local
*local
;
2604 struct ieee80211_hdr_3addr
*hdr
;
2605 struct sk_buff
*skb
;
2609 sdata
= vif_to_sdata(vif
);
2610 local
= sdata
->local
;
2611 ie_ssid_len
= 2 + ssid_len
;
2613 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
2614 ie_ssid_len
+ ie_len
);
2618 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2620 hdr
= (struct ieee80211_hdr_3addr
*) skb_put(skb
, sizeof(*hdr
));
2621 memset(hdr
, 0, sizeof(*hdr
));
2622 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2623 IEEE80211_STYPE_PROBE_REQ
);
2624 memset(hdr
->addr1
, 0xff, ETH_ALEN
);
2625 memcpy(hdr
->addr2
, vif
->addr
, ETH_ALEN
);
2626 memset(hdr
->addr3
, 0xff, ETH_ALEN
);
2628 pos
= skb_put(skb
, ie_ssid_len
);
2629 *pos
++ = WLAN_EID_SSID
;
2632 memcpy(pos
, ssid
, ssid_len
);
2636 pos
= skb_put(skb
, ie_len
);
2637 memcpy(pos
, ie
, ie_len
);
2642 EXPORT_SYMBOL(ieee80211_probereq_get
);
2644 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2645 const void *frame
, size_t frame_len
,
2646 const struct ieee80211_tx_info
*frame_txctl
,
2647 struct ieee80211_rts
*rts
)
2649 const struct ieee80211_hdr
*hdr
= frame
;
2651 rts
->frame_control
=
2652 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
2653 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
2655 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
2656 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
2658 EXPORT_SYMBOL(ieee80211_rts_get
);
2660 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2661 const void *frame
, size_t frame_len
,
2662 const struct ieee80211_tx_info
*frame_txctl
,
2663 struct ieee80211_cts
*cts
)
2665 const struct ieee80211_hdr
*hdr
= frame
;
2667 cts
->frame_control
=
2668 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
2669 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
2670 frame_len
, frame_txctl
);
2671 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
2673 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
2676 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
2677 struct ieee80211_vif
*vif
)
2679 struct ieee80211_local
*local
= hw_to_local(hw
);
2680 struct sk_buff
*skb
= NULL
;
2681 struct ieee80211_tx_data tx
;
2682 struct ieee80211_sub_if_data
*sdata
;
2683 struct ieee80211_if_ap
*bss
= NULL
;
2684 struct beacon_data
*beacon
;
2685 struct ieee80211_tx_info
*info
;
2687 sdata
= vif_to_sdata(vif
);
2691 beacon
= rcu_dereference(bss
->beacon
);
2693 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
|| !beacon
|| !beacon
->head
)
2696 if (bss
->dtim_count
!= 0 || !bss
->dtim_bc_mc
)
2697 goto out
; /* send buffered bc/mc only after DTIM beacon */
2700 skb
= skb_dequeue(&bss
->ps_bc_buf
);
2703 local
->total_ps_buffered
--;
2705 if (!skb_queue_empty(&bss
->ps_bc_buf
) && skb
->len
>= 2) {
2706 struct ieee80211_hdr
*hdr
=
2707 (struct ieee80211_hdr
*) skb
->data
;
2708 /* more buffered multicast/broadcast frames ==> set
2709 * MoreData flag in IEEE 802.11 header to inform PS
2711 hdr
->frame_control
|=
2712 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
2715 if (!ieee80211_tx_prepare(sdata
, &tx
, skb
))
2717 dev_kfree_skb_any(skb
);
2720 info
= IEEE80211_SKB_CB(skb
);
2722 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
2723 tx
.channel
= local
->hw
.conf
.channel
;
2724 info
->band
= tx
.channel
->band
;
2726 if (invoke_tx_handlers(&tx
))
2733 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
2735 void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data
*sdata
,
2736 struct sk_buff
*skb
, int tid
)
2738 int ac
= ieee802_1d_to_ac
[tid
];
2740 skb_set_mac_header(skb
, 0);
2741 skb_set_network_header(skb
, 0);
2742 skb_set_transport_header(skb
, 0);
2744 skb_set_queue_mapping(skb
, ac
);
2745 skb
->priority
= tid
;
2748 * The other path calling ieee80211_xmit is from the tasklet,
2749 * and while we can handle concurrent transmissions locking
2750 * requirements are that we do not come into tx with bhs on.
2753 ieee80211_xmit(sdata
, skb
);