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_MAX_QUEUE_MAP
,
237 IEEE80211_QUEUE_STOP_REASON_PS
);
238 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
239 ieee80211_queue_work(&local
->hw
,
240 &local
->dynamic_ps_disable_work
);
243 /* Don't restart the timer if we're not disassociated */
244 if (!ifmgd
->associated
)
247 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
248 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
253 static ieee80211_tx_result debug_noinline
254 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data
*tx
)
257 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
258 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
261 if (unlikely(info
->flags
& IEEE80211_TX_CTL_INJECTED
))
264 if (unlikely(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
)) &&
265 test_bit(SDATA_STATE_OFFCHANNEL
, &tx
->sdata
->state
) &&
266 !ieee80211_is_probe_req(hdr
->frame_control
) &&
267 !ieee80211_is_nullfunc(hdr
->frame_control
))
269 * When software scanning only nullfunc frames (to notify
270 * the sleep state to the AP) and probe requests (for the
271 * active scan) are allowed, all other frames should not be
272 * sent and we should not get here, but if we do
273 * nonetheless, drop them to avoid sending them
274 * off-channel. See the link below and
275 * ieee80211_start_scan() for more.
277 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
281 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
284 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
287 if (tx
->flags
& IEEE80211_TX_PS_BUFFERED
)
291 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
293 if (likely(tx
->flags
& IEEE80211_TX_UNICAST
)) {
294 if (unlikely(!assoc
&&
295 ieee80211_is_data(hdr
->frame_control
))) {
296 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
297 sdata_info(tx
->sdata
,
298 "dropped data frame to not associated station %pM\n",
301 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
304 } else if (unlikely(tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
305 ieee80211_is_data(hdr
->frame_control
) &&
306 !atomic_read(&tx
->sdata
->u
.ap
.num_mcast_sta
))) {
308 * No associated STAs - no need to send multicast
317 /* This function is called whenever the AP is about to exceed the maximum limit
318 * of buffered frames for power saving STAs. This situation should not really
319 * happen often during normal operation, so dropping the oldest buffered packet
320 * from each queue should be OK to make some room for new frames. */
321 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
323 int total
= 0, purged
= 0;
325 struct ieee80211_sub_if_data
*sdata
;
326 struct sta_info
*sta
;
328 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
331 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
332 ps
= &sdata
->u
.ap
.ps
;
333 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
334 ps
= &sdata
->u
.mesh
.ps
;
338 skb
= skb_dequeue(&ps
->bc_buf
);
343 total
+= skb_queue_len(&ps
->bc_buf
);
347 * Drop one frame from each station from the lowest-priority
348 * AC that has frames at all.
350 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
353 for (ac
= IEEE80211_AC_BK
; ac
>= IEEE80211_AC_VO
; ac
--) {
354 skb
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
355 total
+= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
358 ieee80211_free_txskb(&local
->hw
, skb
);
364 local
->total_ps_buffered
= total
;
365 ps_dbg_hw(&local
->hw
, "PS buffers full - purged %d frames\n", purged
);
368 static ieee80211_tx_result
369 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data
*tx
)
371 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
372 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
376 * broadcast/multicast frame
378 * If any of the associated/peer stations is in power save mode,
379 * the frame is buffered to be sent after DTIM beacon frame.
380 * This is done either by the hardware or us.
383 /* powersaving STAs currently only in AP/VLAN/mesh mode */
384 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
385 tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
389 ps
= &tx
->sdata
->bss
->ps
;
390 } else if (ieee80211_vif_is_mesh(&tx
->sdata
->vif
)) {
391 ps
= &tx
->sdata
->u
.mesh
.ps
;
397 /* no buffering for ordered frames */
398 if (ieee80211_has_order(hdr
->frame_control
))
401 /* no stations in PS mode */
402 if (!atomic_read(&ps
->num_sta_ps
))
405 info
->flags
|= IEEE80211_TX_CTL_SEND_AFTER_DTIM
;
406 if (tx
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
407 info
->hw_queue
= tx
->sdata
->vif
.cab_queue
;
409 /* device releases frame after DTIM beacon */
410 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
))
413 /* buffered in mac80211 */
414 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
415 purge_old_ps_buffers(tx
->local
);
417 if (skb_queue_len(&ps
->bc_buf
) >= AP_MAX_BC_BUFFER
) {
419 "BC TX buffer full - dropping the oldest frame\n");
420 dev_kfree_skb(skb_dequeue(&ps
->bc_buf
));
422 tx
->local
->total_ps_buffered
++;
424 skb_queue_tail(&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 ps_dbg(sta
->sdata
, "STA %pM aid %d: PS buffer for AC %d\n",
471 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
472 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
473 purge_old_ps_buffers(tx
->local
);
474 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
475 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
477 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
479 ieee80211_free_txskb(&local
->hw
, old
);
481 tx
->local
->total_ps_buffered
++;
483 info
->control
.jiffies
= jiffies
;
484 info
->control
.vif
= &tx
->sdata
->vif
;
485 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
486 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
488 if (!timer_pending(&local
->sta_cleanup
))
489 mod_timer(&local
->sta_cleanup
,
490 round_jiffies(jiffies
+
491 STA_INFO_CLEANUP_INTERVAL
));
494 * We queued up some frames, so the TIM bit might
495 * need to be set, recalculate it.
497 sta_info_recalc_tim(sta
);
500 } else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
502 "STA %pM in PS mode, but polling/in SP -> send frame\n",
509 static ieee80211_tx_result debug_noinline
510 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
512 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
515 if (tx
->flags
& IEEE80211_TX_UNICAST
)
516 return ieee80211_tx_h_unicast_ps_buf(tx
);
518 return ieee80211_tx_h_multicast_ps_buf(tx
);
521 static ieee80211_tx_result debug_noinline
522 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
524 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
526 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
&&
527 tx
->sdata
->control_port_no_encrypt
))
528 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
533 static ieee80211_tx_result debug_noinline
534 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
536 struct ieee80211_key
*key
;
537 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
538 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
540 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
))
542 else if (tx
->sta
&& (key
= rcu_dereference(tx
->sta
->ptk
)))
544 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
545 is_multicast_ether_addr(hdr
->addr1
) &&
546 ieee80211_is_robust_mgmt_frame(hdr
) &&
547 (key
= rcu_dereference(tx
->sdata
->default_mgmt_key
)))
549 else if (is_multicast_ether_addr(hdr
->addr1
) &&
550 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
552 else if (!is_multicast_ether_addr(hdr
->addr1
) &&
553 (key
= rcu_dereference(tx
->sdata
->default_unicast_key
)))
555 else if (info
->flags
& IEEE80211_TX_CTL_INJECTED
)
557 else if (!tx
->sdata
->drop_unencrypted
)
559 else if (tx
->skb
->protocol
== tx
->sdata
->control_port_protocol
)
561 else if (ieee80211_is_robust_mgmt_frame(hdr
) &&
562 !(ieee80211_is_action(hdr
->frame_control
) &&
563 tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_MFP
)))
565 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
566 !ieee80211_is_robust_mgmt_frame(hdr
))
569 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_unencrypted
);
574 bool skip_hw
= false;
576 tx
->key
->tx_rx_count
++;
577 /* TODO: add threshold stuff again */
579 switch (tx
->key
->conf
.cipher
) {
580 case WLAN_CIPHER_SUITE_WEP40
:
581 case WLAN_CIPHER_SUITE_WEP104
:
582 case WLAN_CIPHER_SUITE_TKIP
:
583 if (!ieee80211_is_data_present(hdr
->frame_control
))
586 case WLAN_CIPHER_SUITE_CCMP
:
587 if (!ieee80211_is_data_present(hdr
->frame_control
) &&
588 !ieee80211_use_mfp(hdr
->frame_control
, tx
->sta
,
592 skip_hw
= (tx
->key
->conf
.flags
&
593 IEEE80211_KEY_FLAG_SW_MGMT_TX
) &&
594 ieee80211_is_mgmt(hdr
->frame_control
);
596 case WLAN_CIPHER_SUITE_AES_CMAC
:
597 if (!ieee80211_is_mgmt(hdr
->frame_control
))
602 if (unlikely(tx
->key
&& tx
->key
->flags
& KEY_FLAG_TAINTED
&&
603 !ieee80211_is_deauth(hdr
->frame_control
)))
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
[info
->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
[info
->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
[info
->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
,
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
) {
965 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
967 hdr
= (void *)skb
->data
;
968 info
= IEEE80211_SKB_CB(skb
);
970 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
971 hdr
->frame_control
|= morefrags
;
973 * No multi-rate retries for fragmented frames, that
974 * would completely throw off the NAV at other STAs.
976 info
->control
.rates
[1].idx
= -1;
977 info
->control
.rates
[2].idx
= -1;
978 info
->control
.rates
[3].idx
= -1;
979 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 4);
980 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
982 hdr
->frame_control
&= ~morefrags
;
984 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
991 static ieee80211_tx_result debug_noinline
992 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
1000 skb_queue_walk(&tx
->skbs
, skb
) {
1001 ac
= skb_get_queue_mapping(skb
);
1002 tx
->sta
->tx_fragments
++;
1003 tx
->sta
->tx_bytes
[ac
] += skb
->len
;
1006 tx
->sta
->tx_packets
[ac
]++;
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 ieee80211_free_txskb(&tx
->local
->hw
, 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 __skb_queue_head_init(&tx
->skbs
);
1149 * If this flag is set to true anywhere, and we get here,
1150 * we are doing the needed processing, so remove the flag
1153 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1155 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1157 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1158 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1159 if (!tx
->sta
&& sdata
->dev
->ieee80211_ptr
->use_4addr
)
1161 } else if (info
->flags
& IEEE80211_TX_CTL_INJECTED
||
1162 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1163 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1166 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1168 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1169 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1170 (local
->hw
.flags
& IEEE80211_HW_AMPDU_AGGREGATION
) &&
1171 !(local
->hw
.flags
& IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
)) {
1172 struct tid_ampdu_tx
*tid_tx
;
1174 qc
= ieee80211_get_qos_ctl(hdr
);
1175 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
1177 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1181 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1184 if (unlikely(queued
))
1189 if (is_multicast_ether_addr(hdr
->addr1
)) {
1190 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1191 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1193 tx
->flags
|= IEEE80211_TX_UNICAST
;
1195 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1196 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1197 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1198 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1199 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1203 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1204 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
))
1205 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1207 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1212 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1213 struct ieee80211_vif
*vif
,
1214 struct ieee80211_sta
*sta
,
1215 struct sk_buff_head
*skbs
,
1218 struct ieee80211_tx_control control
;
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
);
1229 ieee80211_free_txskb(&local
->hw
, skb
);
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
]))) {
1237 if (unlikely(info
->flags
&
1238 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
)) {
1239 if (local
->queue_stop_reasons
[q
] &
1240 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL
)) {
1242 * Drop off-channel frames if queues
1243 * are stopped for any reason other
1244 * than off-channel operation. Never
1247 spin_unlock_irqrestore(
1248 &local
->queue_stop_reason_lock
,
1250 ieee80211_purge_tx_queue(&local
->hw
,
1257 * Since queue is stopped, queue up frames for
1258 * later transmission from the tx-pending
1259 * tasklet when the queue is woken again.
1262 skb_queue_splice_init(skbs
,
1263 &local
->pending
[q
]);
1265 skb_queue_splice_tail_init(skbs
,
1266 &local
->pending
[q
]);
1268 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1273 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1275 info
->control
.vif
= vif
;
1278 __skb_unlink(skb
, skbs
);
1279 drv_tx(local
, &control
, skb
);
1286 * Returns false if the frame couldn't be transmitted but was queued instead.
1288 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1289 struct sk_buff_head
*skbs
, int led_len
,
1290 struct sta_info
*sta
, bool txpending
)
1292 struct ieee80211_tx_info
*info
;
1293 struct ieee80211_sub_if_data
*sdata
;
1294 struct ieee80211_vif
*vif
;
1295 struct ieee80211_sta
*pubsta
;
1296 struct sk_buff
*skb
;
1300 if (WARN_ON(skb_queue_empty(skbs
)))
1303 skb
= skb_peek(skbs
);
1304 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1305 info
= IEEE80211_SKB_CB(skb
);
1306 sdata
= vif_to_sdata(info
->control
.vif
);
1307 if (sta
&& !sta
->uploaded
)
1315 switch (sdata
->vif
.type
) {
1316 case NL80211_IFTYPE_MONITOR
:
1317 sdata
= rcu_dereference(local
->monitor_sdata
);
1321 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1322 } else if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
1328 case NL80211_IFTYPE_AP_VLAN
:
1329 sdata
= container_of(sdata
->bss
,
1330 struct ieee80211_sub_if_data
, u
.ap
);
1337 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1340 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1341 ieee80211_led_tx(local
, 1);
1343 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1349 * Invoke TX handlers, return 0 on success and non-zero if the
1350 * frame was dropped or queued.
1352 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1354 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1355 ieee80211_tx_result res
= TX_DROP
;
1357 #define CALL_TXH(txh) \
1360 if (res != TX_CONTINUE) \
1364 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1365 CALL_TXH(ieee80211_tx_h_check_assoc
);
1366 CALL_TXH(ieee80211_tx_h_ps_buf
);
1367 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1368 CALL_TXH(ieee80211_tx_h_select_key
);
1369 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1370 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1372 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1373 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1378 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1379 CALL_TXH(ieee80211_tx_h_sequence
);
1380 CALL_TXH(ieee80211_tx_h_fragment
);
1381 /* handlers after fragment must be aware of tx info fragmentation! */
1382 CALL_TXH(ieee80211_tx_h_stats
);
1383 CALL_TXH(ieee80211_tx_h_encrypt
);
1384 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1385 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1389 if (unlikely(res
== TX_DROP
)) {
1390 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1392 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1394 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1396 } else if (unlikely(res
== TX_QUEUED
)) {
1397 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1405 * Returns false if the frame couldn't be transmitted but was queued instead.
1407 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1408 struct sk_buff
*skb
, bool txpending
,
1409 enum ieee80211_band band
)
1411 struct ieee80211_local
*local
= sdata
->local
;
1412 struct ieee80211_tx_data tx
;
1413 ieee80211_tx_result res_prepare
;
1414 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1418 if (unlikely(skb
->len
< 10)) {
1423 /* initialises tx */
1425 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, skb
);
1427 if (unlikely(res_prepare
== TX_DROP
)) {
1428 ieee80211_free_txskb(&local
->hw
, skb
);
1430 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1436 /* set up hw_queue value early */
1437 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1438 !(local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
))
1440 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1442 if (!invoke_tx_handlers(&tx
))
1443 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1449 /* device xmit handlers */
1451 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1452 struct sk_buff
*skb
,
1453 int head_need
, bool may_encrypt
)
1455 struct ieee80211_local
*local
= sdata
->local
;
1458 if (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
) {
1459 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1460 tail_need
-= skb_tailroom(skb
);
1461 tail_need
= max_t(int, tail_need
, 0);
1464 if (skb_cloned(skb
))
1465 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1466 else if (head_need
|| tail_need
)
1467 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1471 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1472 wiphy_debug(local
->hw
.wiphy
,
1473 "failed to reallocate TX buffer\n");
1480 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
1481 enum ieee80211_band band
)
1483 struct ieee80211_local
*local
= sdata
->local
;
1484 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1485 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1489 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1491 headroom
= local
->tx_headroom
;
1493 headroom
+= IEEE80211_ENCRYPT_HEADROOM
;
1494 headroom
-= skb_headroom(skb
);
1495 headroom
= max_t(int, 0, headroom
);
1497 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1498 ieee80211_free_txskb(&local
->hw
, skb
);
1502 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1503 info
->control
.vif
= &sdata
->vif
;
1505 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1506 if (ieee80211_is_data(hdr
->frame_control
) &&
1507 is_unicast_ether_addr(hdr
->addr1
)) {
1508 if (mesh_nexthop_resolve(sdata
, skb
))
1509 return; /* skb queued: don't free */
1511 ieee80211_mps_set_frame_flags(sdata
, NULL
, hdr
);
1515 ieee80211_set_qos_hdr(sdata
, skb
);
1516 ieee80211_tx(sdata
, skb
, false, band
);
1519 static bool ieee80211_parse_tx_radiotap(struct sk_buff
*skb
)
1521 struct ieee80211_radiotap_iterator iterator
;
1522 struct ieee80211_radiotap_header
*rthdr
=
1523 (struct ieee80211_radiotap_header
*) skb
->data
;
1524 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1525 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
1529 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1530 IEEE80211_TX_CTL_DONTFRAG
;
1533 * for every radiotap entry that is present
1534 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1535 * entries present, or -EINVAL on error)
1539 ret
= ieee80211_radiotap_iterator_next(&iterator
);
1544 /* see if this argument is something we can use */
1545 switch (iterator
.this_arg_index
) {
1547 * You must take care when dereferencing iterator.this_arg
1548 * for multibyte types... the pointer is not aligned. Use
1549 * get_unaligned((type *)iterator.this_arg) to dereference
1550 * iterator.this_arg for type "type" safely on all arches.
1552 case IEEE80211_RADIOTAP_FLAGS
:
1553 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
1555 * this indicates that the skb we have been
1556 * handed has the 32-bit FCS CRC at the end...
1557 * we should react to that by snipping it off
1558 * because it will be recomputed and added
1561 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
1564 skb_trim(skb
, skb
->len
- FCS_LEN
);
1566 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
1567 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1568 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
1569 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
1572 case IEEE80211_RADIOTAP_TX_FLAGS
:
1573 txflags
= get_unaligned_le16(iterator
.this_arg
);
1574 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
1575 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1579 * Please update the file
1580 * Documentation/networking/mac80211-injection.txt
1581 * when parsing new fields here.
1589 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
1593 * remove the radiotap header
1594 * iterator->_max_length was sanity-checked against
1595 * skb->len by iterator init
1597 skb_pull(skb
, iterator
._max_length
);
1602 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
1603 struct net_device
*dev
)
1605 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1606 struct ieee80211_chanctx_conf
*chanctx_conf
;
1607 struct ieee80211_channel
*chan
;
1608 struct ieee80211_radiotap_header
*prthdr
=
1609 (struct ieee80211_radiotap_header
*)skb
->data
;
1610 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1611 struct ieee80211_hdr
*hdr
;
1612 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
1616 /* check for not even having the fixed radiotap header part */
1617 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
1618 goto fail
; /* too short to be possibly valid */
1620 /* is it a header version we can trust to find length from? */
1621 if (unlikely(prthdr
->it_version
))
1622 goto fail
; /* only version 0 is supported */
1624 /* then there must be a radiotap header with a length we can use */
1625 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
1627 /* does the skb contain enough to deliver on the alleged length? */
1628 if (unlikely(skb
->len
< len_rthdr
))
1629 goto fail
; /* skb too short for claimed rt header extent */
1632 * fix up the pointers accounting for the radiotap
1633 * header still being in there. We are being given
1634 * a precooked IEEE80211 header so no need for
1637 skb_set_mac_header(skb
, len_rthdr
);
1639 * these are just fixed to the end of the rt area since we
1640 * don't have any better information and at this point, nobody cares
1642 skb_set_network_header(skb
, len_rthdr
);
1643 skb_set_transport_header(skb
, len_rthdr
);
1645 if (skb
->len
< len_rthdr
+ 2)
1648 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
1649 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1651 if (skb
->len
< len_rthdr
+ hdrlen
)
1655 * Initialize skb->protocol if the injected frame is a data frame
1656 * carrying a rfc1042 header
1658 if (ieee80211_is_data(hdr
->frame_control
) &&
1659 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
1660 u8
*payload
= (u8
*)hdr
+ hdrlen
;
1662 if (ether_addr_equal(payload
, rfc1042_header
))
1663 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
1667 memset(info
, 0, sizeof(*info
));
1669 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1670 IEEE80211_TX_CTL_INJECTED
;
1672 /* process and remove the injection radiotap header */
1673 if (!ieee80211_parse_tx_radiotap(skb
))
1679 * We process outgoing injected frames that have a local address
1680 * we handle as though they are non-injected frames.
1681 * This code here isn't entirely correct, the local MAC address
1682 * isn't always enough to find the interface to use; for proper
1683 * VLAN/WDS support we will need a different mechanism (which
1684 * likely isn't going to be monitor interfaces).
1686 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1688 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
1689 if (!ieee80211_sdata_running(tmp_sdata
))
1691 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1692 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1693 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
1695 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
1701 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1702 if (!chanctx_conf
) {
1703 tmp_sdata
= rcu_dereference(local
->monitor_sdata
);
1706 rcu_dereference(tmp_sdata
->vif
.chanctx_conf
);
1710 chan
= chanctx_conf
->def
.chan
;
1711 else if (!local
->use_chanctx
)
1712 chan
= local
->_oper_channel
;
1717 * Frame injection is not allowed if beaconing is not allowed
1718 * or if we need radar detection. Beaconing is usually not allowed when
1719 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1720 * Passive scan is also used in world regulatory domains where
1721 * your country is not known and as such it should be treated as
1722 * NO TX unless the channel is explicitly allowed in which case
1723 * your current regulatory domain would not have the passive scan
1726 * Since AP mode uses monitor interfaces to inject/TX management
1727 * frames we can make AP mode the exception to this rule once it
1728 * supports radar detection as its implementation can deal with
1729 * radar detection by itself. We can do that later by adding a
1730 * monitor flag interfaces used for AP support.
1732 if ((chan
->flags
& (IEEE80211_CHAN_NO_IBSS
| IEEE80211_CHAN_RADAR
|
1733 IEEE80211_CHAN_PASSIVE_SCAN
)))
1736 ieee80211_xmit(sdata
, skb
, chan
->band
);
1739 return NETDEV_TX_OK
;
1745 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
1749 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1750 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1751 * @skb: packet to be sent
1752 * @dev: incoming interface
1754 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1755 * not be freed, and caller is responsible for either retrying later or freeing
1758 * This function takes in an Ethernet header and encapsulates it with suitable
1759 * IEEE 802.11 header based on which interface the packet is coming in. The
1760 * encapsulated packet will then be passed to master interface, wlan#.11, for
1761 * transmission (through low-level driver).
1763 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
1764 struct net_device
*dev
)
1766 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1767 struct ieee80211_local
*local
= sdata
->local
;
1768 struct ieee80211_tx_info
*info
;
1770 u16 ethertype
, hdrlen
, meshhdrlen
= 0;
1772 struct ieee80211_hdr hdr
;
1773 struct ieee80211s_hdr mesh_hdr __maybe_unused
;
1774 struct mesh_path __maybe_unused
*mppath
= NULL
, *mpath
= NULL
;
1775 const u8
*encaps_data
;
1776 int encaps_len
, skip_header_bytes
;
1778 struct sta_info
*sta
= NULL
;
1779 bool wme_sta
= false, authorized
= false, tdls_auth
= false;
1780 bool tdls_direct
= false;
1784 struct ieee80211_chanctx_conf
*chanctx_conf
;
1785 struct ieee80211_sub_if_data
*ap_sdata
;
1786 enum ieee80211_band band
;
1788 if (unlikely(skb
->len
< ETH_HLEN
))
1791 /* convert Ethernet header to proper 802.11 header (based on
1792 * operation mode) */
1793 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
1794 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
1798 switch (sdata
->vif
.type
) {
1799 case NL80211_IFTYPE_AP_VLAN
:
1800 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1802 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1804 memcpy(hdr
.addr1
, sta
->sta
.addr
, ETH_ALEN
);
1805 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1806 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1807 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1809 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1810 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1812 ap_sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1814 chanctx_conf
= rcu_dereference(ap_sdata
->vif
.chanctx_conf
);
1817 band
= chanctx_conf
->def
.chan
->band
;
1821 case NL80211_IFTYPE_AP
:
1822 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1823 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1826 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
1828 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1829 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1830 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1832 band
= chanctx_conf
->def
.chan
->band
;
1834 case NL80211_IFTYPE_WDS
:
1835 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1837 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
1838 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1839 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1840 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1843 * This is the exception! WDS style interfaces are prohibited
1844 * when channel contexts are in used so this must be valid
1846 band
= local
->hw
.conf
.channel
->band
;
1848 #ifdef CONFIG_MAC80211_MESH
1849 case NL80211_IFTYPE_MESH_POINT
:
1850 if (!sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
) {
1851 /* Do not send frames with mesh_ttl == 0 */
1852 sdata
->u
.mesh
.mshstats
.dropped_frames_ttl
++;
1856 if (!is_multicast_ether_addr(skb
->data
)) {
1857 struct sta_info
*next_hop
;
1858 bool mpp_lookup
= true;
1860 mpath
= mesh_path_lookup(sdata
, skb
->data
);
1863 next_hop
= rcu_dereference(mpath
->next_hop
);
1865 !(mpath
->flags
& (MESH_PATH_ACTIVE
|
1866 MESH_PATH_RESOLVING
)))
1871 mppath
= mpp_path_lookup(sdata
, skb
->data
);
1873 if (mppath
&& mpath
)
1874 mesh_path_del(mpath
->sdata
, mpath
->dst
);
1878 * Use address extension if it is a packet from
1879 * another interface or if we know the destination
1880 * is being proxied by a portal (i.e. portal address
1881 * differs from proxied address)
1883 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
1884 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
1885 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1886 skb
->data
, skb
->data
+ ETH_ALEN
);
1887 meshhdrlen
= ieee80211_new_mesh_header(sdata
, &mesh_hdr
,
1890 /* DS -> MBSS (802.11-2012 13.11.3.3).
1891 * For unicast with unknown forwarding information,
1892 * destination might be in the MBSS or if that fails
1893 * forwarded to another mesh gate. In either case
1894 * resolution will be handled in ieee80211_xmit(), so
1895 * leave the original DA. This also works for mcast */
1896 const u8
*mesh_da
= skb
->data
;
1899 mesh_da
= mppath
->mpp
;
1901 mesh_da
= mpath
->dst
;
1903 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1904 mesh_da
, sdata
->vif
.addr
);
1905 if (is_multicast_ether_addr(mesh_da
))
1906 /* DA TA mSA AE:SA */
1907 meshhdrlen
= ieee80211_new_mesh_header(
1909 skb
->data
+ ETH_ALEN
, NULL
);
1911 /* RA TA mDA mSA AE:DA SA */
1912 meshhdrlen
= ieee80211_new_mesh_header(
1913 sdata
, &mesh_hdr
, skb
->data
,
1914 skb
->data
+ ETH_ALEN
);
1917 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1920 band
= chanctx_conf
->def
.chan
->band
;
1923 case NL80211_IFTYPE_STATION
:
1924 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
1925 bool tdls_peer
= false;
1927 sta
= sta_info_get(sdata
, skb
->data
);
1929 authorized
= test_sta_flag(sta
,
1930 WLAN_STA_AUTHORIZED
);
1931 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1932 tdls_peer
= test_sta_flag(sta
,
1933 WLAN_STA_TDLS_PEER
);
1934 tdls_auth
= test_sta_flag(sta
,
1935 WLAN_STA_TDLS_PEER_AUTH
);
1939 * If the TDLS link is enabled, send everything
1940 * directly. Otherwise, allow TDLS setup frames
1941 * to be transmitted indirectly.
1943 tdls_direct
= tdls_peer
&& (tdls_auth
||
1944 !(ethertype
== ETH_P_TDLS
&& skb
->len
> 14 &&
1945 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
));
1949 /* link during setup - throw out frames to peer */
1954 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1955 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1956 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1958 } else if (sdata
->u
.mgd
.use_4addr
&&
1959 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
1960 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
1961 IEEE80211_FCTL_TODS
);
1963 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1964 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1965 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1966 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1969 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
1971 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1972 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1973 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1976 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1979 band
= chanctx_conf
->def
.chan
->band
;
1981 case NL80211_IFTYPE_ADHOC
:
1983 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1984 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1985 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
1987 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1990 band
= chanctx_conf
->def
.chan
->band
;
1997 * There's no need to try to look up the destination
1998 * if it is a multicast address (which can only happen
2001 multicast
= is_multicast_ether_addr(hdr
.addr1
);
2003 sta
= sta_info_get(sdata
, hdr
.addr1
);
2005 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2006 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
2010 /* For mesh, the use of the QoS header is mandatory */
2011 if (ieee80211_vif_is_mesh(&sdata
->vif
))
2014 /* receiver and we are QoS enabled, use a QoS type frame */
2015 if (wme_sta
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
) {
2016 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2021 * Drop unicast frames to unauthorised stations unless they are
2022 * EAPOL frames from the local station.
2024 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2025 !is_multicast_ether_addr(hdr
.addr1
) && !authorized
&&
2026 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
2027 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
2028 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2029 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2030 dev
->name
, hdr
.addr1
);
2033 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
2038 if (unlikely(!multicast
&& skb
->sk
&&
2039 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
2040 struct sk_buff
*orig_skb
= skb
;
2042 skb
= skb_clone(skb
, GFP_ATOMIC
);
2044 unsigned long flags
;
2047 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
2048 id
= idr_alloc(&local
->ack_status_frames
, orig_skb
,
2049 1, 0x10000, GFP_ATOMIC
);
2050 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2054 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2055 } else if (skb_shared(skb
)) {
2056 kfree_skb(orig_skb
);
2062 /* couldn't clone -- lose tx status ... */
2068 * If the skb is shared we need to obtain our own copy.
2070 if (skb_shared(skb
)) {
2071 struct sk_buff
*tmp_skb
= skb
;
2073 /* can't happen -- skb is a clone if info_id != 0 */
2076 skb
= skb_clone(skb
, GFP_ATOMIC
);
2083 hdr
.frame_control
= fc
;
2084 hdr
.duration_id
= 0;
2087 skip_header_bytes
= ETH_HLEN
;
2088 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2089 encaps_data
= bridge_tunnel_header
;
2090 encaps_len
= sizeof(bridge_tunnel_header
);
2091 skip_header_bytes
-= 2;
2092 } else if (ethertype
>= 0x600) {
2093 encaps_data
= rfc1042_header
;
2094 encaps_len
= sizeof(rfc1042_header
);
2095 skip_header_bytes
-= 2;
2101 nh_pos
= skb_network_header(skb
) - skb
->data
;
2102 h_pos
= skb_transport_header(skb
) - skb
->data
;
2104 skb_pull(skb
, skip_header_bytes
);
2105 nh_pos
-= skip_header_bytes
;
2106 h_pos
-= skip_header_bytes
;
2108 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2111 * So we need to modify the skb header and hence need a copy of
2112 * that. The head_need variable above doesn't, so far, include
2113 * the needed header space that we don't need right away. If we
2114 * can, then we don't reallocate right now but only after the
2115 * frame arrives at the master device (if it does...)
2117 * If we cannot, however, then we will reallocate to include all
2118 * the ever needed space. Also, if we need to reallocate it anyway,
2119 * make it big enough for everything we may ever need.
2122 if (head_need
> 0 || skb_cloned(skb
)) {
2123 head_need
+= IEEE80211_ENCRYPT_HEADROOM
;
2124 head_need
+= local
->tx_headroom
;
2125 head_need
= max_t(int, 0, head_need
);
2126 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true)) {
2127 ieee80211_free_txskb(&local
->hw
, skb
);
2134 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2135 nh_pos
+= encaps_len
;
2136 h_pos
+= encaps_len
;
2139 #ifdef CONFIG_MAC80211_MESH
2140 if (meshhdrlen
> 0) {
2141 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2142 nh_pos
+= meshhdrlen
;
2143 h_pos
+= meshhdrlen
;
2147 if (ieee80211_is_data_qos(fc
)) {
2148 __le16
*qos_control
;
2150 qos_control
= (__le16
*) skb_push(skb
, 2);
2151 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2153 * Maybe we could actually set some fields here, for now just
2154 * initialise to zero to indicate no special operation.
2158 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2163 dev
->stats
.tx_packets
++;
2164 dev
->stats
.tx_bytes
+= skb
->len
;
2166 /* Update skb pointers to various headers since this modified frame
2167 * is going to go through Linux networking code that may potentially
2168 * need things like pointer to IP header. */
2169 skb_set_mac_header(skb
, 0);
2170 skb_set_network_header(skb
, nh_pos
);
2171 skb_set_transport_header(skb
, h_pos
);
2173 info
= IEEE80211_SKB_CB(skb
);
2174 memset(info
, 0, sizeof(*info
));
2176 dev
->trans_start
= jiffies
;
2178 info
->flags
= info_flags
;
2179 info
->ack_frame_id
= info_id
;
2181 ieee80211_xmit(sdata
, skb
, band
);
2184 return NETDEV_TX_OK
;
2190 return NETDEV_TX_OK
;
2195 * ieee80211_clear_tx_pending may not be called in a context where
2196 * it is possible that it packets could come in again.
2198 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
2200 struct sk_buff
*skb
;
2203 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2204 while ((skb
= skb_dequeue(&local
->pending
[i
])) != NULL
)
2205 ieee80211_free_txskb(&local
->hw
, skb
);
2210 * Returns false if the frame couldn't be transmitted but was queued instead,
2211 * which in this case means re-queued -- take as an indication to stop sending
2212 * more pending frames.
2214 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
2215 struct sk_buff
*skb
)
2217 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2218 struct ieee80211_sub_if_data
*sdata
;
2219 struct sta_info
*sta
;
2220 struct ieee80211_hdr
*hdr
;
2222 struct ieee80211_chanctx_conf
*chanctx_conf
;
2224 sdata
= vif_to_sdata(info
->control
.vif
);
2226 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
2227 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2228 if (unlikely(!chanctx_conf
)) {
2232 result
= ieee80211_tx(sdata
, skb
, true,
2233 chanctx_conf
->def
.chan
->band
);
2235 struct sk_buff_head skbs
;
2237 __skb_queue_head_init(&skbs
);
2238 __skb_queue_tail(&skbs
, skb
);
2240 hdr
= (struct ieee80211_hdr
*)skb
->data
;
2241 sta
= sta_info_get(sdata
, hdr
->addr1
);
2243 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
2250 * Transmit all pending packets. Called from tasklet.
2252 void ieee80211_tx_pending(unsigned long data
)
2254 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
2255 unsigned long flags
;
2261 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
2262 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2264 * If queue is stopped by something other than due to pending
2265 * frames, or we have no pending frames, proceed to next queue.
2267 if (local
->queue_stop_reasons
[i
] ||
2268 skb_queue_empty(&local
->pending
[i
]))
2271 while (!skb_queue_empty(&local
->pending
[i
])) {
2272 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
2273 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2275 if (WARN_ON(!info
->control
.vif
)) {
2276 ieee80211_free_txskb(&local
->hw
, skb
);
2280 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
2283 txok
= ieee80211_tx_pending_skb(local
, skb
);
2284 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
2290 if (skb_queue_empty(&local
->pending
[i
]))
2291 ieee80211_propagate_queue_wake(local
, i
);
2293 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
2298 /* functions for drivers to get certain frames */
2300 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2301 struct ps_data
*ps
, struct sk_buff
*skb
)
2305 int i
, have_bits
= 0, n1
, n2
;
2307 /* Generate bitmap for TIM only if there are any STAs in power save
2309 if (atomic_read(&ps
->num_sta_ps
) > 0)
2310 /* in the hope that this is faster than
2311 * checking byte-for-byte */
2312 have_bits
= !bitmap_empty((unsigned long*)ps
->tim
,
2313 IEEE80211_MAX_AID
+1);
2315 if (ps
->dtim_count
== 0)
2316 ps
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
2320 tim
= pos
= (u8
*) skb_put(skb
, 6);
2321 *pos
++ = WLAN_EID_TIM
;
2323 *pos
++ = ps
->dtim_count
;
2324 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
2326 if (ps
->dtim_count
== 0 && !skb_queue_empty(&ps
->bc_buf
))
2329 ps
->dtim_bc_mc
= aid0
== 1;
2332 /* Find largest even number N1 so that bits numbered 1 through
2333 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2334 * (N2 + 1) x 8 through 2007 are 0. */
2336 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
2343 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
2350 /* Bitmap control */
2352 /* Part Virt Bitmap */
2353 skb_put(skb
, n2
- n1
);
2354 memcpy(pos
, ps
->tim
+ n1
, n2
- n1
+ 1);
2356 tim
[1] = n2
- n1
+ 4;
2358 *pos
++ = aid0
; /* Bitmap control */
2359 *pos
++ = 0; /* Part Virt Bitmap */
2363 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2364 struct ps_data
*ps
, struct sk_buff
*skb
)
2366 struct ieee80211_local
*local
= sdata
->local
;
2369 * Not very nice, but we want to allow the driver to call
2370 * ieee80211_beacon_get() as a response to the set_tim()
2371 * callback. That, however, is already invoked under the
2372 * sta_lock to guarantee consistent and race-free update
2373 * of the tim bitmap in mac80211 and the driver.
2375 if (local
->tim_in_locked_section
) {
2376 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2378 spin_lock_bh(&local
->tim_lock
);
2379 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2380 spin_unlock_bh(&local
->tim_lock
);
2386 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
2387 struct ieee80211_vif
*vif
,
2388 u16
*tim_offset
, u16
*tim_length
)
2390 struct ieee80211_local
*local
= hw_to_local(hw
);
2391 struct sk_buff
*skb
= NULL
;
2392 struct ieee80211_tx_info
*info
;
2393 struct ieee80211_sub_if_data
*sdata
= NULL
;
2394 enum ieee80211_band band
;
2395 struct ieee80211_tx_rate_control txrc
;
2396 struct ieee80211_chanctx_conf
*chanctx_conf
;
2400 sdata
= vif_to_sdata(vif
);
2401 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2403 if (!ieee80211_sdata_running(sdata
) || !chanctx_conf
)
2411 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2412 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2413 struct beacon_data
*beacon
= rcu_dereference(ap
->beacon
);
2417 * headroom, head length,
2418 * tail length and maximum TIM length
2420 skb
= dev_alloc_skb(local
->tx_headroom
+
2422 beacon
->tail_len
+ 256);
2426 skb_reserve(skb
, local
->tx_headroom
);
2427 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
2430 ieee80211_beacon_add_tim(sdata
, &ap
->ps
, skb
);
2433 *tim_offset
= beacon
->head_len
;
2435 *tim_length
= skb
->len
- beacon
->head_len
;
2438 memcpy(skb_put(skb
, beacon
->tail_len
),
2439 beacon
->tail
, beacon
->tail_len
);
2442 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2443 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2444 struct ieee80211_hdr
*hdr
;
2445 struct sk_buff
*presp
= rcu_dereference(ifibss
->presp
);
2450 skb
= skb_copy(presp
, GFP_ATOMIC
);
2454 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2455 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2456 IEEE80211_STYPE_BEACON
);
2457 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2458 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2459 struct beacon_data
*bcn
= rcu_dereference(ifmsh
->beacon
);
2464 if (ifmsh
->sync_ops
)
2465 ifmsh
->sync_ops
->adjust_tbtt(
2468 skb
= dev_alloc_skb(local
->tx_headroom
+
2474 skb_reserve(skb
, local
->tx_headroom
);
2475 memcpy(skb_put(skb
, bcn
->head_len
), bcn
->head
, bcn
->head_len
);
2476 ieee80211_beacon_add_tim(sdata
, &ifmsh
->ps
, skb
);
2477 memcpy(skb_put(skb
, bcn
->tail_len
), bcn
->tail
, bcn
->tail_len
);
2483 band
= chanctx_conf
->def
.chan
->band
;
2485 info
= IEEE80211_SKB_CB(skb
);
2487 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
2488 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
2491 memset(&txrc
, 0, sizeof(txrc
));
2493 txrc
.sband
= local
->hw
.wiphy
->bands
[band
];
2494 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
2496 txrc
.reported_rate
.idx
= -1;
2497 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
2498 if (txrc
.rate_idx_mask
== (1 << txrc
.sband
->n_bitrates
) - 1)
2499 txrc
.max_rate_idx
= -1;
2501 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
2502 memcpy(txrc
.rate_idx_mcs_mask
, sdata
->rc_rateidx_mcs_mask
[band
],
2503 sizeof(txrc
.rate_idx_mcs_mask
));
2505 rate_control_get_rate(sdata
, NULL
, &txrc
);
2507 info
->control
.vif
= vif
;
2509 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
2510 IEEE80211_TX_CTL_ASSIGN_SEQ
|
2511 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
2516 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
2518 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
2519 struct ieee80211_vif
*vif
)
2521 struct ieee80211_if_ap
*ap
= NULL
;
2522 struct sk_buff
*skb
= NULL
;
2523 struct probe_resp
*presp
= NULL
;
2524 struct ieee80211_hdr
*hdr
;
2525 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2527 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
2533 presp
= rcu_dereference(ap
->probe_resp
);
2537 skb
= dev_alloc_skb(presp
->len
);
2541 memcpy(skb_put(skb
, presp
->len
), presp
->data
, presp
->len
);
2543 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2544 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
2550 EXPORT_SYMBOL(ieee80211_proberesp_get
);
2552 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
2553 struct ieee80211_vif
*vif
)
2555 struct ieee80211_sub_if_data
*sdata
;
2556 struct ieee80211_if_managed
*ifmgd
;
2557 struct ieee80211_pspoll
*pspoll
;
2558 struct ieee80211_local
*local
;
2559 struct sk_buff
*skb
;
2561 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2564 sdata
= vif_to_sdata(vif
);
2565 ifmgd
= &sdata
->u
.mgd
;
2566 local
= sdata
->local
;
2568 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
2572 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2574 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
2575 memset(pspoll
, 0, sizeof(*pspoll
));
2576 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
2577 IEEE80211_STYPE_PSPOLL
);
2578 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
2580 /* aid in PS-Poll has its two MSBs each set to 1 */
2581 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
2583 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
2584 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
2588 EXPORT_SYMBOL(ieee80211_pspoll_get
);
2590 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
2591 struct ieee80211_vif
*vif
)
2593 struct ieee80211_hdr_3addr
*nullfunc
;
2594 struct ieee80211_sub_if_data
*sdata
;
2595 struct ieee80211_if_managed
*ifmgd
;
2596 struct ieee80211_local
*local
;
2597 struct sk_buff
*skb
;
2599 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2602 sdata
= vif_to_sdata(vif
);
2603 ifmgd
= &sdata
->u
.mgd
;
2604 local
= sdata
->local
;
2606 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*nullfunc
));
2610 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2612 nullfunc
= (struct ieee80211_hdr_3addr
*) skb_put(skb
,
2614 memset(nullfunc
, 0, sizeof(*nullfunc
));
2615 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
2616 IEEE80211_STYPE_NULLFUNC
|
2617 IEEE80211_FCTL_TODS
);
2618 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
2619 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
2620 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
2624 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
2626 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
2627 struct ieee80211_vif
*vif
,
2628 const u8
*ssid
, size_t ssid_len
,
2631 struct ieee80211_sub_if_data
*sdata
;
2632 struct ieee80211_local
*local
;
2633 struct ieee80211_hdr_3addr
*hdr
;
2634 struct sk_buff
*skb
;
2638 sdata
= vif_to_sdata(vif
);
2639 local
= sdata
->local
;
2640 ie_ssid_len
= 2 + ssid_len
;
2642 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
2643 ie_ssid_len
+ tailroom
);
2647 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2649 hdr
= (struct ieee80211_hdr_3addr
*) skb_put(skb
, sizeof(*hdr
));
2650 memset(hdr
, 0, sizeof(*hdr
));
2651 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2652 IEEE80211_STYPE_PROBE_REQ
);
2653 eth_broadcast_addr(hdr
->addr1
);
2654 memcpy(hdr
->addr2
, vif
->addr
, ETH_ALEN
);
2655 eth_broadcast_addr(hdr
->addr3
);
2657 pos
= skb_put(skb
, ie_ssid_len
);
2658 *pos
++ = WLAN_EID_SSID
;
2661 memcpy(pos
, ssid
, ssid_len
);
2666 EXPORT_SYMBOL(ieee80211_probereq_get
);
2668 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2669 const void *frame
, size_t frame_len
,
2670 const struct ieee80211_tx_info
*frame_txctl
,
2671 struct ieee80211_rts
*rts
)
2673 const struct ieee80211_hdr
*hdr
= frame
;
2675 rts
->frame_control
=
2676 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
2677 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
2679 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
2680 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
2682 EXPORT_SYMBOL(ieee80211_rts_get
);
2684 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2685 const void *frame
, size_t frame_len
,
2686 const struct ieee80211_tx_info
*frame_txctl
,
2687 struct ieee80211_cts
*cts
)
2689 const struct ieee80211_hdr
*hdr
= frame
;
2691 cts
->frame_control
=
2692 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
2693 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
2694 frame_len
, frame_txctl
);
2695 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
2697 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
2700 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
2701 struct ieee80211_vif
*vif
)
2703 struct ieee80211_local
*local
= hw_to_local(hw
);
2704 struct sk_buff
*skb
= NULL
;
2705 struct ieee80211_tx_data tx
;
2706 struct ieee80211_sub_if_data
*sdata
;
2708 struct ieee80211_tx_info
*info
;
2709 struct ieee80211_chanctx_conf
*chanctx_conf
;
2711 sdata
= vif_to_sdata(vif
);
2714 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2719 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2720 struct beacon_data
*beacon
=
2721 rcu_dereference(sdata
->u
.ap
.beacon
);
2723 if (!beacon
|| !beacon
->head
)
2726 ps
= &sdata
->u
.ap
.ps
;
2727 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2728 ps
= &sdata
->u
.mesh
.ps
;
2733 if (ps
->dtim_count
!= 0 || !ps
->dtim_bc_mc
)
2734 goto out
; /* send buffered bc/mc only after DTIM beacon */
2737 skb
= skb_dequeue(&ps
->bc_buf
);
2740 local
->total_ps_buffered
--;
2742 if (!skb_queue_empty(&ps
->bc_buf
) && skb
->len
>= 2) {
2743 struct ieee80211_hdr
*hdr
=
2744 (struct ieee80211_hdr
*) skb
->data
;
2745 /* more buffered multicast/broadcast frames ==> set
2746 * MoreData flag in IEEE 802.11 header to inform PS
2748 hdr
->frame_control
|=
2749 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
2752 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
2753 sdata
= IEEE80211_DEV_TO_SUB_IF(skb
->dev
);
2754 if (!ieee80211_tx_prepare(sdata
, &tx
, skb
))
2756 dev_kfree_skb_any(skb
);
2759 info
= IEEE80211_SKB_CB(skb
);
2761 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
2762 info
->band
= chanctx_conf
->def
.chan
->band
;
2764 if (invoke_tx_handlers(&tx
))
2771 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
2773 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data
*sdata
,
2774 struct sk_buff
*skb
, int tid
,
2775 enum ieee80211_band band
)
2777 int ac
= ieee802_1d_to_ac
[tid
& 7];
2779 skb_set_mac_header(skb
, 0);
2780 skb_set_network_header(skb
, 0);
2781 skb_set_transport_header(skb
, 0);
2783 skb_set_queue_mapping(skb
, ac
);
2784 skb
->priority
= tid
;
2786 skb
->dev
= sdata
->dev
;
2789 * The other path calling ieee80211_xmit is from the tasklet,
2790 * and while we can handle concurrent transmissions locking
2791 * requirements are that we do not come into tx with bhs on.
2794 ieee80211_xmit(sdata
, skb
, band
);