2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 * Transmit and frame generation functions.
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/bitmap.h>
21 #include <linux/rcupdate.h>
22 #include <linux/export.h>
23 #include <net/net_namespace.h>
24 #include <net/ieee80211_radiotap.h>
25 #include <net/cfg80211.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
40 static __le16
ieee80211_duration(struct ieee80211_tx_data
*tx
,
41 struct sk_buff
*skb
, int group_addr
,
44 int rate
, mrate
, erp
, dur
, i
, shift
= 0;
45 struct ieee80211_rate
*txrate
;
46 struct ieee80211_local
*local
= tx
->local
;
47 struct ieee80211_supported_band
*sband
;
48 struct ieee80211_hdr
*hdr
;
49 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
50 struct ieee80211_chanctx_conf
*chanctx_conf
;
54 chanctx_conf
= rcu_dereference(tx
->sdata
->vif
.chanctx_conf
);
56 shift
= ieee80211_chandef_get_shift(&chanctx_conf
->def
);
57 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
61 /* assume HW handles this */
62 if (tx
->rate
.flags
& (IEEE80211_TX_RC_MCS
| IEEE80211_TX_RC_VHT_MCS
))
66 if (WARN_ON_ONCE(tx
->rate
.idx
< 0))
69 sband
= local
->hw
.wiphy
->bands
[info
->band
];
70 txrate
= &sband
->bitrates
[tx
->rate
.idx
];
72 erp
= txrate
->flags
& IEEE80211_RATE_ERP_G
;
75 * data and mgmt (except PS Poll):
77 * - during contention period:
78 * if addr1 is group address: 0
79 * if more fragments = 0 and addr1 is individual address: time to
80 * transmit one ACK plus SIFS
81 * if more fragments = 1 and addr1 is individual address: time to
82 * transmit next fragment plus 2 x ACK plus 3 x SIFS
85 * - control response frame (CTS or ACK) shall be transmitted using the
86 * same rate as the immediately previous frame in the frame exchange
87 * sequence, if this rate belongs to the PHY mandatory rates, or else
88 * at the highest possible rate belonging to the PHY rates in the
91 hdr
= (struct ieee80211_hdr
*)skb
->data
;
92 if (ieee80211_is_ctl(hdr
->frame_control
)) {
93 /* TODO: These control frames are not currently sent by
94 * mac80211, but should they be implemented, this function
95 * needs to be updated to support duration field calculation.
97 * RTS: time needed to transmit pending data/mgmt frame plus
98 * one CTS frame plus one ACK frame plus 3 x SIFS
99 * CTS: duration of immediately previous RTS minus time
100 * required to transmit CTS and its SIFS
101 * ACK: 0 if immediately previous directed data/mgmt had
102 * more=0, with more=1 duration in ACK frame is duration
103 * from previous frame minus time needed to transmit ACK
105 * PS Poll: BIT(15) | BIT(14) | aid
111 if (0 /* FIX: data/mgmt during CFP */)
112 return cpu_to_le16(32768);
114 if (group_addr
) /* Group address as the destination - no ACK */
117 /* Individual destination address:
118 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
119 * CTS and ACK frames shall be transmitted using the highest rate in
120 * basic rate set that is less than or equal to the rate of the
121 * immediately previous frame and that is using the same modulation
122 * (CCK or OFDM). If no basic rate set matches with these requirements,
123 * the highest mandatory rate of the PHY that is less than or equal to
124 * the rate of the previous frame is used.
125 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
128 /* use lowest available if everything fails */
129 mrate
= sband
->bitrates
[0].bitrate
;
130 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
131 struct ieee80211_rate
*r
= &sband
->bitrates
[i
];
133 if (r
->bitrate
> txrate
->bitrate
)
136 if ((rate_flags
& r
->flags
) != rate_flags
)
139 if (tx
->sdata
->vif
.bss_conf
.basic_rates
& BIT(i
))
140 rate
= DIV_ROUND_UP(r
->bitrate
, 1 << shift
);
142 switch (sband
->band
) {
143 case IEEE80211_BAND_2GHZ
: {
145 if (tx
->sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
146 flag
= IEEE80211_RATE_MANDATORY_G
;
148 flag
= IEEE80211_RATE_MANDATORY_B
;
153 case IEEE80211_BAND_5GHZ
:
154 if (r
->flags
& IEEE80211_RATE_MANDATORY_A
)
157 case IEEE80211_BAND_60GHZ
:
158 /* TODO, for now fall through */
159 case IEEE80211_NUM_BANDS
:
165 /* No matching basic rate found; use highest suitable mandatory
167 rate
= DIV_ROUND_UP(mrate
, 1 << shift
);
170 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
171 if (ieee80211_is_data_qos(hdr
->frame_control
) &&
172 *(ieee80211_get_qos_ctl(hdr
)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK
)
175 /* Time needed to transmit ACK
176 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
177 * to closest integer */
178 dur
= ieee80211_frame_duration(sband
->band
, 10, rate
, erp
,
179 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
183 /* Frame is fragmented: duration increases with time needed to
184 * transmit next fragment plus ACK and 2 x SIFS. */
185 dur
*= 2; /* ACK + SIFS */
187 dur
+= ieee80211_frame_duration(sband
->band
, next_frag_len
,
188 txrate
->bitrate
, erp
,
189 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
193 return cpu_to_le16(dur
);
197 static ieee80211_tx_result debug_noinline
198 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data
*tx
)
200 struct ieee80211_local
*local
= tx
->local
;
201 struct ieee80211_if_managed
*ifmgd
;
203 /* driver doesn't support power save */
204 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
))
207 /* hardware does dynamic power save */
208 if (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)
211 /* dynamic power save disabled */
212 if (local
->hw
.conf
.dynamic_ps_timeout
<= 0)
215 /* we are scanning, don't enable power save */
219 if (!local
->ps_sdata
)
222 /* No point if we're going to suspend */
223 if (local
->quiescing
)
226 /* dynamic ps is supported only in managed mode */
227 if (tx
->sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
230 ifmgd
= &tx
->sdata
->u
.mgd
;
233 * Don't wakeup from power save if u-apsd is enabled, voip ac has
234 * u-apsd enabled and the frame is in voip class. This effectively
235 * means that even if all access categories have u-apsd enabled, in
236 * practise u-apsd is only used with the voip ac. This is a
237 * workaround for the case when received voip class packets do not
238 * have correct qos tag for some reason, due the network or the
241 * Note: ifmgd->uapsd_queues access is racy here. If the value is
242 * changed via debugfs, user needs to reassociate manually to have
243 * everything in sync.
245 if ((ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
) &&
246 (ifmgd
->uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
) &&
247 skb_get_queue_mapping(tx
->skb
) == IEEE80211_AC_VO
)
250 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
251 ieee80211_stop_queues_by_reason(&local
->hw
,
252 IEEE80211_MAX_QUEUE_MAP
,
253 IEEE80211_QUEUE_STOP_REASON_PS
,
255 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
256 ieee80211_queue_work(&local
->hw
,
257 &local
->dynamic_ps_disable_work
);
260 /* Don't restart the timer if we're not disassociated */
261 if (!ifmgd
->associated
)
264 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
265 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
270 static ieee80211_tx_result debug_noinline
271 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data
*tx
)
274 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
275 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
278 if (unlikely(info
->flags
& IEEE80211_TX_CTL_INJECTED
))
281 if (unlikely(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
)) &&
282 test_bit(SDATA_STATE_OFFCHANNEL
, &tx
->sdata
->state
) &&
283 !ieee80211_is_probe_req(hdr
->frame_control
) &&
284 !ieee80211_is_nullfunc(hdr
->frame_control
))
286 * When software scanning only nullfunc frames (to notify
287 * the sleep state to the AP) and probe requests (for the
288 * active scan) are allowed, all other frames should not be
289 * sent and we should not get here, but if we do
290 * nonetheless, drop them to avoid sending them
291 * off-channel. See the link below and
292 * ieee80211_start_scan() for more.
294 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
298 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
)
301 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
304 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
307 if (tx
->flags
& IEEE80211_TX_PS_BUFFERED
)
311 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
313 if (likely(tx
->flags
& IEEE80211_TX_UNICAST
)) {
314 if (unlikely(!assoc
&&
315 ieee80211_is_data(hdr
->frame_control
))) {
316 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
317 sdata_info(tx
->sdata
,
318 "dropped data frame to not associated station %pM\n",
321 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
324 } else if (unlikely(tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
325 ieee80211_is_data(hdr
->frame_control
) &&
326 !atomic_read(&tx
->sdata
->u
.ap
.num_mcast_sta
))) {
328 * No associated STAs - no need to send multicast
337 /* This function is called whenever the AP is about to exceed the maximum limit
338 * of buffered frames for power saving STAs. This situation should not really
339 * happen often during normal operation, so dropping the oldest buffered packet
340 * from each queue should be OK to make some room for new frames. */
341 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
343 int total
= 0, purged
= 0;
345 struct ieee80211_sub_if_data
*sdata
;
346 struct sta_info
*sta
;
348 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
351 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
352 ps
= &sdata
->u
.ap
.ps
;
353 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
354 ps
= &sdata
->u
.mesh
.ps
;
358 skb
= skb_dequeue(&ps
->bc_buf
);
363 total
+= skb_queue_len(&ps
->bc_buf
);
367 * Drop one frame from each station from the lowest-priority
368 * AC that has frames at all.
370 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
373 for (ac
= IEEE80211_AC_BK
; ac
>= IEEE80211_AC_VO
; ac
--) {
374 skb
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
375 total
+= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
378 ieee80211_free_txskb(&local
->hw
, skb
);
384 local
->total_ps_buffered
= total
;
385 ps_dbg_hw(&local
->hw
, "PS buffers full - purged %d frames\n", purged
);
388 static ieee80211_tx_result
389 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data
*tx
)
391 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
392 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
396 * broadcast/multicast frame
398 * If any of the associated/peer stations is in power save mode,
399 * the frame is buffered to be sent after DTIM beacon frame.
400 * This is done either by the hardware or us.
403 /* powersaving STAs currently only in AP/VLAN/mesh mode */
404 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
405 tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
409 ps
= &tx
->sdata
->bss
->ps
;
410 } else if (ieee80211_vif_is_mesh(&tx
->sdata
->vif
)) {
411 ps
= &tx
->sdata
->u
.mesh
.ps
;
417 /* no buffering for ordered frames */
418 if (ieee80211_has_order(hdr
->frame_control
))
421 if (ieee80211_is_probe_req(hdr
->frame_control
))
424 if (tx
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
425 info
->hw_queue
= tx
->sdata
->vif
.cab_queue
;
427 /* no stations in PS mode */
428 if (!atomic_read(&ps
->num_sta_ps
))
431 info
->flags
|= IEEE80211_TX_CTL_SEND_AFTER_DTIM
;
433 /* device releases frame after DTIM beacon */
434 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
))
437 /* buffered in mac80211 */
438 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
439 purge_old_ps_buffers(tx
->local
);
441 if (skb_queue_len(&ps
->bc_buf
) >= AP_MAX_BC_BUFFER
) {
443 "BC TX buffer full - dropping the oldest frame\n");
444 dev_kfree_skb(skb_dequeue(&ps
->bc_buf
));
446 tx
->local
->total_ps_buffered
++;
448 skb_queue_tail(&ps
->bc_buf
, tx
->skb
);
453 static int ieee80211_use_mfp(__le16 fc
, struct sta_info
*sta
,
456 if (!ieee80211_is_mgmt(fc
))
459 if (sta
== NULL
|| !test_sta_flag(sta
, WLAN_STA_MFP
))
462 if (!ieee80211_is_robust_mgmt_frame(skb
))
468 static ieee80211_tx_result
469 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data
*tx
)
471 struct sta_info
*sta
= tx
->sta
;
472 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
473 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
474 struct ieee80211_local
*local
= tx
->local
;
479 if (unlikely((test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
480 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
481 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) &&
482 !(info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
))) {
483 int ac
= skb_get_queue_mapping(tx
->skb
);
485 if (ieee80211_is_mgmt(hdr
->frame_control
) &&
486 !ieee80211_is_bufferable_mmpdu(hdr
->frame_control
)) {
487 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
491 ps_dbg(sta
->sdata
, "STA %pM aid %d: PS buffer for AC %d\n",
492 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
493 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
494 purge_old_ps_buffers(tx
->local
);
496 /* sync with ieee80211_sta_ps_deliver_wakeup */
497 spin_lock(&sta
->ps_lock
);
499 * STA woke up the meantime and all the frames on ps_tx_buf have
500 * been queued to pending queue. No reordering can happen, go
501 * ahead and Tx the packet.
503 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
) &&
504 !test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) &&
505 !test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) {
506 spin_unlock(&sta
->ps_lock
);
510 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
511 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
513 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
515 ieee80211_free_txskb(&local
->hw
, old
);
517 tx
->local
->total_ps_buffered
++;
519 info
->control
.jiffies
= jiffies
;
520 info
->control
.vif
= &tx
->sdata
->vif
;
521 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
522 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
523 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
524 spin_unlock(&sta
->ps_lock
);
526 if (!timer_pending(&local
->sta_cleanup
))
527 mod_timer(&local
->sta_cleanup
,
528 round_jiffies(jiffies
+
529 STA_INFO_CLEANUP_INTERVAL
));
532 * We queued up some frames, so the TIM bit might
533 * need to be set, recalculate it.
535 sta_info_recalc_tim(sta
);
538 } else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
540 "STA %pM in PS mode, but polling/in SP -> send frame\n",
547 static ieee80211_tx_result debug_noinline
548 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
550 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
553 if (tx
->flags
& IEEE80211_TX_UNICAST
)
554 return ieee80211_tx_h_unicast_ps_buf(tx
);
556 return ieee80211_tx_h_multicast_ps_buf(tx
);
559 static ieee80211_tx_result debug_noinline
560 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
562 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
564 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
)) {
565 if (tx
->sdata
->control_port_no_encrypt
)
566 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
567 info
->control
.flags
|= IEEE80211_TX_CTRL_PORT_CTRL_PROTO
;
573 static ieee80211_tx_result debug_noinline
574 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
576 struct ieee80211_key
*key
;
577 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
578 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
580 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
))
583 (key
= rcu_dereference(tx
->sta
->ptk
[tx
->sta
->ptk_idx
])))
585 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
586 is_multicast_ether_addr(hdr
->addr1
) &&
587 ieee80211_is_robust_mgmt_frame(tx
->skb
) &&
588 (key
= rcu_dereference(tx
->sdata
->default_mgmt_key
)))
590 else if (is_multicast_ether_addr(hdr
->addr1
) &&
591 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
593 else if (!is_multicast_ether_addr(hdr
->addr1
) &&
594 (key
= rcu_dereference(tx
->sdata
->default_unicast_key
)))
600 bool skip_hw
= false;
602 tx
->key
->tx_rx_count
++;
603 /* TODO: add threshold stuff again */
605 switch (tx
->key
->conf
.cipher
) {
606 case WLAN_CIPHER_SUITE_WEP40
:
607 case WLAN_CIPHER_SUITE_WEP104
:
608 case WLAN_CIPHER_SUITE_TKIP
:
609 if (!ieee80211_is_data_present(hdr
->frame_control
))
612 case WLAN_CIPHER_SUITE_CCMP
:
613 case WLAN_CIPHER_SUITE_CCMP_256
:
614 case WLAN_CIPHER_SUITE_GCMP
:
615 case WLAN_CIPHER_SUITE_GCMP_256
:
616 if (!ieee80211_is_data_present(hdr
->frame_control
) &&
617 !ieee80211_use_mfp(hdr
->frame_control
, tx
->sta
,
621 skip_hw
= (tx
->key
->conf
.flags
&
622 IEEE80211_KEY_FLAG_SW_MGMT_TX
) &&
623 ieee80211_is_mgmt(hdr
->frame_control
);
625 case WLAN_CIPHER_SUITE_AES_CMAC
:
626 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
627 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
628 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
629 if (!ieee80211_is_mgmt(hdr
->frame_control
))
634 if (unlikely(tx
->key
&& tx
->key
->flags
& KEY_FLAG_TAINTED
&&
635 !ieee80211_is_deauth(hdr
->frame_control
)))
638 if (!skip_hw
&& tx
->key
&&
639 tx
->key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
)
640 info
->control
.hw_key
= &tx
->key
->conf
;
646 static ieee80211_tx_result debug_noinline
647 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data
*tx
)
649 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
650 struct ieee80211_hdr
*hdr
= (void *)tx
->skb
->data
;
651 struct ieee80211_supported_band
*sband
;
653 struct ieee80211_tx_rate_control txrc
;
654 struct ieee80211_sta_rates
*ratetbl
= NULL
;
657 memset(&txrc
, 0, sizeof(txrc
));
659 sband
= tx
->local
->hw
.wiphy
->bands
[info
->band
];
661 len
= min_t(u32
, tx
->skb
->len
+ FCS_LEN
,
662 tx
->local
->hw
.wiphy
->frag_threshold
);
664 /* set up the tx rate control struct we give the RC algo */
665 txrc
.hw
= &tx
->local
->hw
;
667 txrc
.bss_conf
= &tx
->sdata
->vif
.bss_conf
;
669 txrc
.reported_rate
.idx
= -1;
670 txrc
.rate_idx_mask
= tx
->sdata
->rc_rateidx_mask
[info
->band
];
671 if (txrc
.rate_idx_mask
== (1 << sband
->n_bitrates
) - 1)
672 txrc
.max_rate_idx
= -1;
674 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
676 if (tx
->sdata
->rc_has_mcs_mask
[info
->band
])
677 txrc
.rate_idx_mcs_mask
=
678 tx
->sdata
->rc_rateidx_mcs_mask
[info
->band
];
680 txrc
.bss
= (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
681 tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
||
682 tx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
);
684 /* set up RTS protection if desired */
685 if (len
> tx
->local
->hw
.wiphy
->rts_threshold
) {
689 info
->control
.use_rts
= txrc
.rts
;
690 info
->control
.use_cts_prot
= tx
->sdata
->vif
.bss_conf
.use_cts_prot
;
693 * Use short preamble if the BSS can handle it, but not for
694 * management frames unless we know the receiver can handle
695 * that -- the management frame might be to a station that
696 * just wants a probe response.
698 if (tx
->sdata
->vif
.bss_conf
.use_short_preamble
&&
699 (ieee80211_is_data(hdr
->frame_control
) ||
700 (tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_SHORT_PREAMBLE
))))
701 txrc
.short_preamble
= true;
703 info
->control
.short_preamble
= txrc
.short_preamble
;
706 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
709 * Lets not bother rate control if we're associated and cannot
710 * talk to the sta. This should not happen.
712 if (WARN(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
) && assoc
&&
713 !rate_usable_index_exists(sband
, &tx
->sta
->sta
),
714 "%s: Dropped data frame as no usable bitrate found while "
715 "scanning and associated. Target station: "
716 "%pM on %d GHz band\n",
717 tx
->sdata
->name
, hdr
->addr1
,
722 * If we're associated with the sta at this point we know we can at
723 * least send the frame at the lowest bit rate.
725 rate_control_get_rate(tx
->sdata
, tx
->sta
, &txrc
);
727 if (tx
->sta
&& !info
->control
.skip_table
)
728 ratetbl
= rcu_dereference(tx
->sta
->sta
.rates
);
730 if (unlikely(info
->control
.rates
[0].idx
< 0)) {
732 struct ieee80211_tx_rate rate
= {
733 .idx
= ratetbl
->rate
[0].idx
,
734 .flags
= ratetbl
->rate
[0].flags
,
735 .count
= ratetbl
->rate
[0].count
738 if (ratetbl
->rate
[0].idx
< 0)
746 tx
->rate
= info
->control
.rates
[0];
749 if (txrc
.reported_rate
.idx
< 0) {
750 txrc
.reported_rate
= tx
->rate
;
751 if (tx
->sta
&& ieee80211_is_data(hdr
->frame_control
))
752 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
754 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
759 if (unlikely(!info
->control
.rates
[0].count
))
760 info
->control
.rates
[0].count
= 1;
762 if (WARN_ON_ONCE((info
->control
.rates
[0].count
> 1) &&
763 (info
->flags
& IEEE80211_TX_CTL_NO_ACK
)))
764 info
->control
.rates
[0].count
= 1;
769 static ieee80211_tx_result debug_noinline
770 ieee80211_tx_h_sequence(struct ieee80211_tx_data
*tx
)
772 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
773 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
779 * Packet injection may want to control the sequence
780 * number, if we have no matching interface then we
781 * neither assign one ourselves nor ask the driver to.
783 if (unlikely(info
->control
.vif
->type
== NL80211_IFTYPE_MONITOR
))
786 if (unlikely(ieee80211_is_ctl(hdr
->frame_control
)))
789 if (ieee80211_hdrlen(hdr
->frame_control
) < 24)
792 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
796 * Anything but QoS data that has a sequence number field
797 * (is long enough) gets a sequence number from the global
798 * counter. QoS data frames with a multicast destination
799 * also use the global counter (802.11-2012 9.3.2.10).
801 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
802 is_multicast_ether_addr(hdr
->addr1
)) {
803 /* driver should assign sequence number */
804 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
805 /* for pure STA mode without beacons, we can do it */
806 hdr
->seq_ctrl
= cpu_to_le16(tx
->sdata
->sequence_number
);
807 tx
->sdata
->sequence_number
+= 0x10;
809 tx
->sta
->tx_msdu
[IEEE80211_NUM_TIDS
]++;
814 * This should be true for injected/management frames only, for
815 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
816 * above since they are not QoS-data frames.
821 /* include per-STA, per-TID sequence counter */
823 qc
= ieee80211_get_qos_ctl(hdr
);
824 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
825 seq
= &tx
->sta
->tid_seq
[tid
];
826 tx
->sta
->tx_msdu
[tid
]++;
828 hdr
->seq_ctrl
= cpu_to_le16(*seq
);
830 /* Increase the sequence number. */
831 *seq
= (*seq
+ 0x10) & IEEE80211_SCTL_SEQ
;
836 static int ieee80211_fragment(struct ieee80211_tx_data
*tx
,
837 struct sk_buff
*skb
, int hdrlen
,
840 struct ieee80211_local
*local
= tx
->local
;
841 struct ieee80211_tx_info
*info
;
843 int per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
844 int pos
= hdrlen
+ per_fragm
;
845 int rem
= skb
->len
- hdrlen
- per_fragm
;
847 if (WARN_ON(rem
< 0))
850 /* first fragment was already added to queue by caller */
853 int fraglen
= per_fragm
;
858 tmp
= dev_alloc_skb(local
->tx_headroom
+
860 tx
->sdata
->encrypt_headroom
+
861 IEEE80211_ENCRYPT_TAILROOM
);
865 __skb_queue_tail(&tx
->skbs
, tmp
);
868 local
->tx_headroom
+ tx
->sdata
->encrypt_headroom
);
870 /* copy control information */
871 memcpy(tmp
->cb
, skb
->cb
, sizeof(tmp
->cb
));
873 info
= IEEE80211_SKB_CB(tmp
);
874 info
->flags
&= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT
|
875 IEEE80211_TX_CTL_FIRST_FRAGMENT
);
878 info
->flags
|= IEEE80211_TX_CTL_MORE_FRAMES
;
880 skb_copy_queue_mapping(tmp
, skb
);
881 tmp
->priority
= skb
->priority
;
884 /* copy header and data */
885 memcpy(skb_put(tmp
, hdrlen
), skb
->data
, hdrlen
);
886 memcpy(skb_put(tmp
, fraglen
), skb
->data
+ pos
, fraglen
);
891 /* adjust first fragment's length */
892 skb_trim(skb
, hdrlen
+ per_fragm
);
896 static ieee80211_tx_result debug_noinline
897 ieee80211_tx_h_fragment(struct ieee80211_tx_data
*tx
)
899 struct sk_buff
*skb
= tx
->skb
;
900 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
901 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
902 int frag_threshold
= tx
->local
->hw
.wiphy
->frag_threshold
;
906 /* no matter what happens, tx->skb moves to tx->skbs */
907 __skb_queue_tail(&tx
->skbs
, skb
);
910 if (info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)
913 if (tx
->local
->ops
->set_frag_threshold
)
917 * Warn when submitting a fragmented A-MPDU frame and drop it.
918 * This scenario is handled in ieee80211_tx_prepare but extra
919 * caution taken here as fragmented ampdu may cause Tx stop.
921 if (WARN_ON(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
924 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
926 /* internal error, why isn't DONTFRAG set? */
927 if (WARN_ON(skb
->len
+ FCS_LEN
<= frag_threshold
))
931 * Now fragment the frame. This will allocate all the fragments and
932 * chain them (using skb as the first fragment) to skb->next.
933 * During transmission, we will remove the successfully transmitted
934 * fragments from this list. When the low-level driver rejects one
935 * of the fragments then we will simply pretend to accept the skb
936 * but store it away as pending.
938 if (ieee80211_fragment(tx
, skb
, hdrlen
, frag_threshold
))
941 /* update duration/seq/flags of fragments */
944 skb_queue_walk(&tx
->skbs
, skb
) {
945 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
947 hdr
= (void *)skb
->data
;
948 info
= IEEE80211_SKB_CB(skb
);
950 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
951 hdr
->frame_control
|= morefrags
;
953 * No multi-rate retries for fragmented frames, that
954 * would completely throw off the NAV at other STAs.
956 info
->control
.rates
[1].idx
= -1;
957 info
->control
.rates
[2].idx
= -1;
958 info
->control
.rates
[3].idx
= -1;
959 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 4);
960 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
962 hdr
->frame_control
&= ~morefrags
;
964 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
971 static ieee80211_tx_result debug_noinline
972 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
980 skb_queue_walk(&tx
->skbs
, skb
) {
981 ac
= skb_get_queue_mapping(skb
);
982 tx
->sta
->tx_fragments
++;
983 tx
->sta
->tx_bytes
[ac
] += skb
->len
;
986 tx
->sta
->tx_packets
[ac
]++;
991 static ieee80211_tx_result debug_noinline
992 ieee80211_tx_h_encrypt(struct ieee80211_tx_data
*tx
)
997 switch (tx
->key
->conf
.cipher
) {
998 case WLAN_CIPHER_SUITE_WEP40
:
999 case WLAN_CIPHER_SUITE_WEP104
:
1000 return ieee80211_crypto_wep_encrypt(tx
);
1001 case WLAN_CIPHER_SUITE_TKIP
:
1002 return ieee80211_crypto_tkip_encrypt(tx
);
1003 case WLAN_CIPHER_SUITE_CCMP
:
1004 return ieee80211_crypto_ccmp_encrypt(
1005 tx
, IEEE80211_CCMP_MIC_LEN
);
1006 case WLAN_CIPHER_SUITE_CCMP_256
:
1007 return ieee80211_crypto_ccmp_encrypt(
1008 tx
, IEEE80211_CCMP_256_MIC_LEN
);
1009 case WLAN_CIPHER_SUITE_AES_CMAC
:
1010 return ieee80211_crypto_aes_cmac_encrypt(tx
);
1011 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
1012 return ieee80211_crypto_aes_cmac_256_encrypt(tx
);
1013 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
1014 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
1015 return ieee80211_crypto_aes_gmac_encrypt(tx
);
1016 case WLAN_CIPHER_SUITE_GCMP
:
1017 case WLAN_CIPHER_SUITE_GCMP_256
:
1018 return ieee80211_crypto_gcmp_encrypt(tx
);
1020 return ieee80211_crypto_hw_encrypt(tx
);
1026 static ieee80211_tx_result debug_noinline
1027 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data
*tx
)
1029 struct sk_buff
*skb
;
1030 struct ieee80211_hdr
*hdr
;
1034 skb_queue_walk(&tx
->skbs
, skb
) {
1035 hdr
= (void *) skb
->data
;
1036 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
)))
1037 break; /* must not overwrite AID */
1038 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1039 struct sk_buff
*next
= skb_queue_next(&tx
->skbs
, skb
);
1040 next_len
= next
->len
;
1043 group_addr
= is_multicast_ether_addr(hdr
->addr1
);
1046 ieee80211_duration(tx
, skb
, group_addr
, next_len
);
1052 /* actual transmit path */
1054 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data
*tx
,
1055 struct sk_buff
*skb
,
1056 struct ieee80211_tx_info
*info
,
1057 struct tid_ampdu_tx
*tid_tx
,
1060 bool queued
= false;
1061 bool reset_agg_timer
= false;
1062 struct sk_buff
*purge_skb
= NULL
;
1064 if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1065 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1066 reset_agg_timer
= true;
1067 } else if (test_bit(HT_AGG_STATE_WANT_START
, &tid_tx
->state
)) {
1069 * nothing -- this aggregation session is being started
1070 * but that might still fail with the driver
1073 spin_lock(&tx
->sta
->lock
);
1075 * Need to re-check now, because we may get here
1077 * 1) in the window during which the setup is actually
1078 * already done, but not marked yet because not all
1079 * packets are spliced over to the driver pending
1080 * queue yet -- if this happened we acquire the lock
1081 * either before or after the splice happens, but
1082 * need to recheck which of these cases happened.
1084 * 2) during session teardown, if the OPERATIONAL bit
1085 * was cleared due to the teardown but the pointer
1086 * hasn't been assigned NULL yet (or we loaded it
1087 * before it was assigned) -- in this case it may
1088 * now be NULL which means we should just let the
1089 * packet pass through because splicing the frames
1090 * back is already done.
1092 tid_tx
= rcu_dereference_protected_tid_tx(tx
->sta
, tid
);
1095 /* do nothing, let packet pass through */
1096 } else if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1097 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1098 reset_agg_timer
= true;
1101 info
->control
.vif
= &tx
->sdata
->vif
;
1102 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1103 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
1104 __skb_queue_tail(&tid_tx
->pending
, skb
);
1105 if (skb_queue_len(&tid_tx
->pending
) > STA_MAX_TX_BUFFER
)
1106 purge_skb
= __skb_dequeue(&tid_tx
->pending
);
1108 spin_unlock(&tx
->sta
->lock
);
1111 ieee80211_free_txskb(&tx
->local
->hw
, purge_skb
);
1114 /* reset session timer */
1115 if (reset_agg_timer
&& tid_tx
->timeout
)
1116 tid_tx
->last_tx
= jiffies
;
1124 static ieee80211_tx_result
1125 ieee80211_tx_prepare(struct ieee80211_sub_if_data
*sdata
,
1126 struct ieee80211_tx_data
*tx
,
1127 struct sk_buff
*skb
)
1129 struct ieee80211_local
*local
= sdata
->local
;
1130 struct ieee80211_hdr
*hdr
;
1131 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1135 memset(tx
, 0, sizeof(*tx
));
1139 __skb_queue_head_init(&tx
->skbs
);
1142 * If this flag is set to true anywhere, and we get here,
1143 * we are doing the needed processing, so remove the flag
1146 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1148 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1150 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1151 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1152 if (!tx
->sta
&& sdata
->dev
->ieee80211_ptr
->use_4addr
)
1154 } else if (info
->flags
& (IEEE80211_TX_CTL_INJECTED
|
1155 IEEE80211_TX_INTFL_NL80211_FRAME_TX
) ||
1156 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1157 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1159 if (!tx
->sta
&& !is_multicast_ether_addr(hdr
->addr1
))
1160 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1162 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1163 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1164 (local
->hw
.flags
& IEEE80211_HW_AMPDU_AGGREGATION
) &&
1165 !(local
->hw
.flags
& IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
)) {
1166 struct tid_ampdu_tx
*tid_tx
;
1168 qc
= ieee80211_get_qos_ctl(hdr
);
1169 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
1171 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1175 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1178 if (unlikely(queued
))
1183 if (is_multicast_ether_addr(hdr
->addr1
)) {
1184 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1185 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1187 tx
->flags
|= IEEE80211_TX_UNICAST
;
1189 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1190 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1191 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1192 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1193 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1197 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1198 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
))
1199 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1201 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1206 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1207 struct ieee80211_vif
*vif
,
1208 struct ieee80211_sta
*sta
,
1209 struct sk_buff_head
*skbs
,
1212 struct ieee80211_tx_control control
;
1213 struct sk_buff
*skb
, *tmp
;
1214 unsigned long flags
;
1216 skb_queue_walk_safe(skbs
, skb
, tmp
) {
1217 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1218 int q
= info
->hw_queue
;
1220 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1221 if (WARN_ON_ONCE(q
>= local
->hw
.queues
)) {
1222 __skb_unlink(skb
, skbs
);
1223 ieee80211_free_txskb(&local
->hw
, skb
);
1228 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1229 if (local
->queue_stop_reasons
[q
] ||
1230 (!txpending
&& !skb_queue_empty(&local
->pending
[q
]))) {
1231 if (unlikely(info
->flags
&
1232 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
)) {
1233 if (local
->queue_stop_reasons
[q
] &
1234 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL
)) {
1236 * Drop off-channel frames if queues
1237 * are stopped for any reason other
1238 * than off-channel operation. Never
1241 spin_unlock_irqrestore(
1242 &local
->queue_stop_reason_lock
,
1244 ieee80211_purge_tx_queue(&local
->hw
,
1251 * Since queue is stopped, queue up frames for
1252 * later transmission from the tx-pending
1253 * tasklet when the queue is woken again.
1256 skb_queue_splice_init(skbs
,
1257 &local
->pending
[q
]);
1259 skb_queue_splice_tail_init(skbs
,
1260 &local
->pending
[q
]);
1262 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1267 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1269 info
->control
.vif
= vif
;
1272 __skb_unlink(skb
, skbs
);
1273 drv_tx(local
, &control
, skb
);
1280 * Returns false if the frame couldn't be transmitted but was queued instead.
1282 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1283 struct sk_buff_head
*skbs
, int led_len
,
1284 struct sta_info
*sta
, bool txpending
)
1286 struct ieee80211_tx_info
*info
;
1287 struct ieee80211_sub_if_data
*sdata
;
1288 struct ieee80211_vif
*vif
;
1289 struct ieee80211_sta
*pubsta
;
1290 struct sk_buff
*skb
;
1294 if (WARN_ON(skb_queue_empty(skbs
)))
1297 skb
= skb_peek(skbs
);
1298 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1299 info
= IEEE80211_SKB_CB(skb
);
1300 sdata
= vif_to_sdata(info
->control
.vif
);
1301 if (sta
&& !sta
->uploaded
)
1309 switch (sdata
->vif
.type
) {
1310 case NL80211_IFTYPE_MONITOR
:
1311 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
1315 sdata
= rcu_dereference(local
->monitor_sdata
);
1319 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1320 } else if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
1326 case NL80211_IFTYPE_AP_VLAN
:
1327 sdata
= container_of(sdata
->bss
,
1328 struct ieee80211_sub_if_data
, u
.ap
);
1335 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1338 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1340 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1346 * Invoke TX handlers, return 0 on success and non-zero if the
1347 * frame was dropped or queued.
1349 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1351 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1352 ieee80211_tx_result res
= TX_DROP
;
1354 #define CALL_TXH(txh) \
1357 if (res != TX_CONTINUE) \
1361 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1362 CALL_TXH(ieee80211_tx_h_check_assoc
);
1363 CALL_TXH(ieee80211_tx_h_ps_buf
);
1364 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1365 CALL_TXH(ieee80211_tx_h_select_key
);
1366 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1367 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1369 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1370 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1375 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1376 CALL_TXH(ieee80211_tx_h_sequence
);
1377 CALL_TXH(ieee80211_tx_h_fragment
);
1378 /* handlers after fragment must be aware of tx info fragmentation! */
1379 CALL_TXH(ieee80211_tx_h_stats
);
1380 CALL_TXH(ieee80211_tx_h_encrypt
);
1381 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1382 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1386 if (unlikely(res
== TX_DROP
)) {
1387 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1389 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1391 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1393 } else if (unlikely(res
== TX_QUEUED
)) {
1394 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1401 bool ieee80211_tx_prepare_skb(struct ieee80211_hw
*hw
,
1402 struct ieee80211_vif
*vif
, struct sk_buff
*skb
,
1403 int band
, struct ieee80211_sta
**sta
)
1405 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1406 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1407 struct ieee80211_tx_data tx
;
1408 struct sk_buff
*skb2
;
1410 if (ieee80211_tx_prepare(sdata
, &tx
, skb
) == TX_DROP
)
1414 info
->control
.vif
= vif
;
1415 info
->hw_queue
= vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1417 if (invoke_tx_handlers(&tx
))
1422 *sta
= &tx
.sta
->sta
;
1427 /* this function isn't suitable for fragmented data frames */
1428 skb2
= __skb_dequeue(&tx
.skbs
);
1429 if (WARN_ON(skb2
!= skb
|| !skb_queue_empty(&tx
.skbs
))) {
1430 ieee80211_free_txskb(hw
, skb2
);
1431 ieee80211_purge_tx_queue(hw
, &tx
.skbs
);
1437 EXPORT_SYMBOL(ieee80211_tx_prepare_skb
);
1440 * Returns false if the frame couldn't be transmitted but was queued instead.
1442 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1443 struct sk_buff
*skb
, bool txpending
)
1445 struct ieee80211_local
*local
= sdata
->local
;
1446 struct ieee80211_tx_data tx
;
1447 ieee80211_tx_result res_prepare
;
1448 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1452 if (unlikely(skb
->len
< 10)) {
1457 /* initialises tx */
1459 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, skb
);
1461 if (unlikely(res_prepare
== TX_DROP
)) {
1462 ieee80211_free_txskb(&local
->hw
, skb
);
1464 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1468 /* set up hw_queue value early */
1469 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1470 !(local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
))
1472 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1474 if (!invoke_tx_handlers(&tx
))
1475 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1481 /* device xmit handlers */
1483 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1484 struct sk_buff
*skb
,
1485 int head_need
, bool may_encrypt
)
1487 struct ieee80211_local
*local
= sdata
->local
;
1490 if (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
) {
1491 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1492 tail_need
-= skb_tailroom(skb
);
1493 tail_need
= max_t(int, tail_need
, 0);
1496 if (skb_cloned(skb
) &&
1497 (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CLONED_SKBS
) ||
1498 !skb_clone_writable(skb
, ETH_HLEN
) ||
1499 sdata
->crypto_tx_tailroom_needed_cnt
))
1500 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1501 else if (head_need
|| tail_need
)
1502 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1506 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1507 wiphy_debug(local
->hw
.wiphy
,
1508 "failed to reallocate TX buffer\n");
1515 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
)
1517 struct ieee80211_local
*local
= sdata
->local
;
1518 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1519 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1523 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1525 headroom
= local
->tx_headroom
;
1527 headroom
+= sdata
->encrypt_headroom
;
1528 headroom
-= skb_headroom(skb
);
1529 headroom
= max_t(int, 0, headroom
);
1531 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1532 ieee80211_free_txskb(&local
->hw
, skb
);
1536 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1537 info
->control
.vif
= &sdata
->vif
;
1539 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1540 if (ieee80211_is_data(hdr
->frame_control
) &&
1541 is_unicast_ether_addr(hdr
->addr1
)) {
1542 if (mesh_nexthop_resolve(sdata
, skb
))
1543 return; /* skb queued: don't free */
1545 ieee80211_mps_set_frame_flags(sdata
, NULL
, hdr
);
1549 ieee80211_set_qos_hdr(sdata
, skb
);
1550 ieee80211_tx(sdata
, skb
, false);
1553 static bool ieee80211_parse_tx_radiotap(struct sk_buff
*skb
)
1555 struct ieee80211_radiotap_iterator iterator
;
1556 struct ieee80211_radiotap_header
*rthdr
=
1557 (struct ieee80211_radiotap_header
*) skb
->data
;
1558 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1559 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
1563 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1564 IEEE80211_TX_CTL_DONTFRAG
;
1567 * for every radiotap entry that is present
1568 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1569 * entries present, or -EINVAL on error)
1573 ret
= ieee80211_radiotap_iterator_next(&iterator
);
1578 /* see if this argument is something we can use */
1579 switch (iterator
.this_arg_index
) {
1581 * You must take care when dereferencing iterator.this_arg
1582 * for multibyte types... the pointer is not aligned. Use
1583 * get_unaligned((type *)iterator.this_arg) to dereference
1584 * iterator.this_arg for type "type" safely on all arches.
1586 case IEEE80211_RADIOTAP_FLAGS
:
1587 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
1589 * this indicates that the skb we have been
1590 * handed has the 32-bit FCS CRC at the end...
1591 * we should react to that by snipping it off
1592 * because it will be recomputed and added
1595 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
1598 skb_trim(skb
, skb
->len
- FCS_LEN
);
1600 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
1601 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1602 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
1603 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
1606 case IEEE80211_RADIOTAP_TX_FLAGS
:
1607 txflags
= get_unaligned_le16(iterator
.this_arg
);
1608 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
1609 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1613 * Please update the file
1614 * Documentation/networking/mac80211-injection.txt
1615 * when parsing new fields here.
1623 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
1627 * remove the radiotap header
1628 * iterator->_max_length was sanity-checked against
1629 * skb->len by iterator init
1631 skb_pull(skb
, iterator
._max_length
);
1636 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
1637 struct net_device
*dev
)
1639 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1640 struct ieee80211_chanctx_conf
*chanctx_conf
;
1641 struct ieee80211_radiotap_header
*prthdr
=
1642 (struct ieee80211_radiotap_header
*)skb
->data
;
1643 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1644 struct ieee80211_hdr
*hdr
;
1645 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
1646 struct cfg80211_chan_def
*chandef
;
1650 /* check for not even having the fixed radiotap header part */
1651 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
1652 goto fail
; /* too short to be possibly valid */
1654 /* is it a header version we can trust to find length from? */
1655 if (unlikely(prthdr
->it_version
))
1656 goto fail
; /* only version 0 is supported */
1658 /* then there must be a radiotap header with a length we can use */
1659 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
1661 /* does the skb contain enough to deliver on the alleged length? */
1662 if (unlikely(skb
->len
< len_rthdr
))
1663 goto fail
; /* skb too short for claimed rt header extent */
1666 * fix up the pointers accounting for the radiotap
1667 * header still being in there. We are being given
1668 * a precooked IEEE80211 header so no need for
1671 skb_set_mac_header(skb
, len_rthdr
);
1673 * these are just fixed to the end of the rt area since we
1674 * don't have any better information and at this point, nobody cares
1676 skb_set_network_header(skb
, len_rthdr
);
1677 skb_set_transport_header(skb
, len_rthdr
);
1679 if (skb
->len
< len_rthdr
+ 2)
1682 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
1683 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1685 if (skb
->len
< len_rthdr
+ hdrlen
)
1689 * Initialize skb->protocol if the injected frame is a data frame
1690 * carrying a rfc1042 header
1692 if (ieee80211_is_data(hdr
->frame_control
) &&
1693 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
1694 u8
*payload
= (u8
*)hdr
+ hdrlen
;
1696 if (ether_addr_equal(payload
, rfc1042_header
))
1697 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
1701 memset(info
, 0, sizeof(*info
));
1703 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1704 IEEE80211_TX_CTL_INJECTED
;
1706 /* process and remove the injection radiotap header */
1707 if (!ieee80211_parse_tx_radiotap(skb
))
1713 * We process outgoing injected frames that have a local address
1714 * we handle as though they are non-injected frames.
1715 * This code here isn't entirely correct, the local MAC address
1716 * isn't always enough to find the interface to use; for proper
1717 * VLAN/WDS support we will need a different mechanism (which
1718 * likely isn't going to be monitor interfaces).
1720 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1722 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
1723 if (!ieee80211_sdata_running(tmp_sdata
))
1725 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1726 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1727 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
1729 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
1735 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1736 if (!chanctx_conf
) {
1737 tmp_sdata
= rcu_dereference(local
->monitor_sdata
);
1740 rcu_dereference(tmp_sdata
->vif
.chanctx_conf
);
1744 chandef
= &chanctx_conf
->def
;
1745 else if (!local
->use_chanctx
)
1746 chandef
= &local
->_oper_chandef
;
1751 * Frame injection is not allowed if beaconing is not allowed
1752 * or if we need radar detection. Beaconing is usually not allowed when
1753 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1754 * Passive scan is also used in world regulatory domains where
1755 * your country is not known and as such it should be treated as
1756 * NO TX unless the channel is explicitly allowed in which case
1757 * your current regulatory domain would not have the passive scan
1760 * Since AP mode uses monitor interfaces to inject/TX management
1761 * frames we can make AP mode the exception to this rule once it
1762 * supports radar detection as its implementation can deal with
1763 * radar detection by itself. We can do that later by adding a
1764 * monitor flag interfaces used for AP support.
1766 if (!cfg80211_reg_can_beacon(local
->hw
.wiphy
, chandef
,
1770 info
->band
= chandef
->chan
->band
;
1771 ieee80211_xmit(sdata
, skb
);
1774 return NETDEV_TX_OK
;
1780 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
1784 * ieee80211_build_hdr - build 802.11 header in the given frame
1785 * @sdata: virtual interface to build the header for
1786 * @skb: the skb to build the header in
1787 * @info_flags: skb flags to set
1789 * This function takes the skb with 802.3 header and reformats the header to
1790 * the appropriate IEEE 802.11 header based on which interface the packet is
1791 * being transmitted on.
1793 * Note that this function also takes care of the TX status request and
1794 * potential unsharing of the SKB - this needs to be interleaved with the
1797 * The function requires the read-side RCU lock held
1799 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
1801 static struct sk_buff
*ieee80211_build_hdr(struct ieee80211_sub_if_data
*sdata
,
1802 struct sk_buff
*skb
, u32 info_flags
)
1804 struct ieee80211_local
*local
= sdata
->local
;
1805 struct ieee80211_tx_info
*info
;
1807 u16 ethertype
, hdrlen
, meshhdrlen
= 0;
1809 struct ieee80211_hdr hdr
;
1810 struct ieee80211s_hdr mesh_hdr __maybe_unused
;
1811 struct mesh_path __maybe_unused
*mppath
= NULL
, *mpath
= NULL
;
1812 const u8
*encaps_data
;
1813 int encaps_len
, skip_header_bytes
;
1815 struct sta_info
*sta
= NULL
;
1816 bool wme_sta
= false, authorized
= false, tdls_auth
= false;
1817 bool tdls_peer
= false, tdls_setup_frame
= false;
1819 bool have_station
= false;
1821 struct ieee80211_chanctx_conf
*chanctx_conf
;
1822 struct ieee80211_sub_if_data
*ap_sdata
;
1823 enum ieee80211_band band
;
1826 /* convert Ethernet header to proper 802.11 header (based on
1827 * operation mode) */
1828 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
1829 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
1831 switch (sdata
->vif
.type
) {
1832 case NL80211_IFTYPE_AP_VLAN
:
1833 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1835 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1837 memcpy(hdr
.addr1
, sta
->sta
.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
);
1842 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1843 wme_sta
= sta
->sta
.wme
;
1844 have_station
= true;
1845 } else if (sdata
->wdev
.use_4addr
) {
1849 ap_sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1851 chanctx_conf
= rcu_dereference(ap_sdata
->vif
.chanctx_conf
);
1852 if (!chanctx_conf
) {
1856 band
= chanctx_conf
->def
.chan
->band
;
1860 case NL80211_IFTYPE_AP
:
1861 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1862 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1863 if (!chanctx_conf
) {
1867 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
1869 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1870 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1871 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1873 band
= chanctx_conf
->def
.chan
->band
;
1875 case NL80211_IFTYPE_WDS
:
1876 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1878 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
1879 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1880 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1881 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1884 * This is the exception! WDS style interfaces are prohibited
1885 * when channel contexts are in used so this must be valid
1887 band
= local
->hw
.conf
.chandef
.chan
->band
;
1889 #ifdef CONFIG_MAC80211_MESH
1890 case NL80211_IFTYPE_MESH_POINT
:
1891 if (!is_multicast_ether_addr(skb
->data
)) {
1892 struct sta_info
*next_hop
;
1893 bool mpp_lookup
= true;
1895 mpath
= mesh_path_lookup(sdata
, skb
->data
);
1898 next_hop
= rcu_dereference(mpath
->next_hop
);
1900 !(mpath
->flags
& (MESH_PATH_ACTIVE
|
1901 MESH_PATH_RESOLVING
)))
1906 mppath
= mpp_path_lookup(sdata
, skb
->data
);
1908 if (mppath
&& mpath
)
1909 mesh_path_del(mpath
->sdata
, mpath
->dst
);
1913 * Use address extension if it is a packet from
1914 * another interface or if we know the destination
1915 * is being proxied by a portal (i.e. portal address
1916 * differs from proxied address)
1918 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
1919 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
1920 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1921 skb
->data
, skb
->data
+ ETH_ALEN
);
1922 meshhdrlen
= ieee80211_new_mesh_header(sdata
, &mesh_hdr
,
1925 /* DS -> MBSS (802.11-2012 13.11.3.3).
1926 * For unicast with unknown forwarding information,
1927 * destination might be in the MBSS or if that fails
1928 * forwarded to another mesh gate. In either case
1929 * resolution will be handled in ieee80211_xmit(), so
1930 * leave the original DA. This also works for mcast */
1931 const u8
*mesh_da
= skb
->data
;
1934 mesh_da
= mppath
->mpp
;
1936 mesh_da
= mpath
->dst
;
1938 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1939 mesh_da
, sdata
->vif
.addr
);
1940 if (is_multicast_ether_addr(mesh_da
))
1941 /* DA TA mSA AE:SA */
1942 meshhdrlen
= ieee80211_new_mesh_header(
1944 skb
->data
+ ETH_ALEN
, NULL
);
1946 /* RA TA mDA mSA AE:DA SA */
1947 meshhdrlen
= ieee80211_new_mesh_header(
1948 sdata
, &mesh_hdr
, skb
->data
,
1949 skb
->data
+ ETH_ALEN
);
1952 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1953 if (!chanctx_conf
) {
1957 band
= chanctx_conf
->def
.chan
->band
;
1960 case NL80211_IFTYPE_STATION
:
1961 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
1962 sta
= sta_info_get(sdata
, skb
->data
);
1964 tdls_peer
= test_sta_flag(sta
,
1965 WLAN_STA_TDLS_PEER
);
1966 tdls_auth
= test_sta_flag(sta
,
1967 WLAN_STA_TDLS_PEER_AUTH
);
1972 ethertype
== ETH_P_TDLS
&&
1974 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
;
1978 * TDLS link during setup - throw out frames to peer. We allow
1979 * TDLS-setup frames to unauthorized peers for the special case
1980 * of a link teardown after a TDLS sta is removed due to being
1983 if (tdls_peer
&& !tdls_auth
&& !tdls_setup_frame
) {
1988 /* send direct packets to authorized TDLS peers */
1989 if (tdls_peer
&& tdls_auth
) {
1991 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1992 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1993 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1995 have_station
= true;
1996 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1997 wme_sta
= sta
->sta
.wme
;
1998 } else if (sdata
->u
.mgd
.use_4addr
&&
1999 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
2000 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
2001 IEEE80211_FCTL_TODS
);
2003 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2004 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2005 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2006 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2009 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
2011 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2012 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2013 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2016 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2017 if (!chanctx_conf
) {
2021 band
= chanctx_conf
->def
.chan
->band
;
2023 case NL80211_IFTYPE_OCB
:
2025 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2026 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2027 eth_broadcast_addr(hdr
.addr3
);
2029 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2030 if (!chanctx_conf
) {
2034 band
= chanctx_conf
->def
.chan
->band
;
2036 case NL80211_IFTYPE_ADHOC
:
2038 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2039 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2040 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
2042 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2043 if (!chanctx_conf
) {
2047 band
= chanctx_conf
->def
.chan
->band
;
2055 * There's no need to try to look up the destination station
2056 * if it is a multicast address. In mesh, there's no need to
2057 * look up the station at all as it always must be QoS capable
2058 * and mesh mode checks authorization later.
2060 multicast
= is_multicast_ether_addr(hdr
.addr1
);
2061 if (!multicast
&& !have_station
&&
2062 !ieee80211_vif_is_mesh(&sdata
->vif
)) {
2063 sta
= sta_info_get(sdata
, hdr
.addr1
);
2065 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2066 wme_sta
= sta
->sta
.wme
;
2070 /* For mesh, the use of the QoS header is mandatory */
2071 if (ieee80211_vif_is_mesh(&sdata
->vif
))
2074 /* receiver and we are QoS enabled, use a QoS type frame */
2075 if (wme_sta
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
) {
2076 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2081 * Drop unicast frames to unauthorised stations unless they are
2082 * EAPOL frames from the local station.
2084 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2085 (sdata
->vif
.type
!= NL80211_IFTYPE_OCB
) &&
2086 !multicast
&& !authorized
&&
2087 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
2088 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
2089 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2090 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2091 sdata
->name
, hdr
.addr1
);
2094 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
2100 if (unlikely(!multicast
&& skb
->sk
&&
2101 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
2102 struct sk_buff
*ack_skb
= skb_clone_sk(skb
);
2105 unsigned long flags
;
2108 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
2109 id
= idr_alloc(&local
->ack_status_frames
, ack_skb
,
2110 1, 0x10000, GFP_ATOMIC
);
2111 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2115 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2123 * If the skb is shared we need to obtain our own copy.
2125 if (skb_shared(skb
)) {
2126 struct sk_buff
*tmp_skb
= skb
;
2128 /* can't happen -- skb is a clone if info_id != 0 */
2131 skb
= skb_clone(skb
, GFP_ATOMIC
);
2140 hdr
.frame_control
= fc
;
2141 hdr
.duration_id
= 0;
2144 skip_header_bytes
= ETH_HLEN
;
2145 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2146 encaps_data
= bridge_tunnel_header
;
2147 encaps_len
= sizeof(bridge_tunnel_header
);
2148 skip_header_bytes
-= 2;
2149 } else if (ethertype
>= ETH_P_802_3_MIN
) {
2150 encaps_data
= rfc1042_header
;
2151 encaps_len
= sizeof(rfc1042_header
);
2152 skip_header_bytes
-= 2;
2158 nh_pos
= skb_network_header(skb
) - skb
->data
;
2159 h_pos
= skb_transport_header(skb
) - skb
->data
;
2161 skb_pull(skb
, skip_header_bytes
);
2162 nh_pos
-= skip_header_bytes
;
2163 h_pos
-= skip_header_bytes
;
2165 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2168 * So we need to modify the skb header and hence need a copy of
2169 * that. The head_need variable above doesn't, so far, include
2170 * the needed header space that we don't need right away. If we
2171 * can, then we don't reallocate right now but only after the
2172 * frame arrives at the master device (if it does...)
2174 * If we cannot, however, then we will reallocate to include all
2175 * the ever needed space. Also, if we need to reallocate it anyway,
2176 * make it big enough for everything we may ever need.
2179 if (head_need
> 0 || skb_cloned(skb
)) {
2180 head_need
+= sdata
->encrypt_headroom
;
2181 head_need
+= local
->tx_headroom
;
2182 head_need
= max_t(int, 0, head_need
);
2183 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true)) {
2184 ieee80211_free_txskb(&local
->hw
, skb
);
2186 return ERR_PTR(-ENOMEM
);
2191 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2192 nh_pos
+= encaps_len
;
2193 h_pos
+= encaps_len
;
2196 #ifdef CONFIG_MAC80211_MESH
2197 if (meshhdrlen
> 0) {
2198 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2199 nh_pos
+= meshhdrlen
;
2200 h_pos
+= meshhdrlen
;
2204 if (ieee80211_is_data_qos(fc
)) {
2205 __le16
*qos_control
;
2207 qos_control
= (__le16
*) skb_push(skb
, 2);
2208 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2210 * Maybe we could actually set some fields here, for now just
2211 * initialise to zero to indicate no special operation.
2215 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2220 /* Update skb pointers to various headers since this modified frame
2221 * is going to go through Linux networking code that may potentially
2222 * need things like pointer to IP header. */
2223 skb_set_mac_header(skb
, 0);
2224 skb_set_network_header(skb
, nh_pos
);
2225 skb_set_transport_header(skb
, h_pos
);
2227 info
= IEEE80211_SKB_CB(skb
);
2228 memset(info
, 0, sizeof(*info
));
2230 info
->flags
= info_flags
;
2231 info
->ack_frame_id
= info_id
;
2237 return ERR_PTR(ret
);
2240 void __ieee80211_subif_start_xmit(struct sk_buff
*skb
,
2241 struct net_device
*dev
,
2244 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2246 if (unlikely(skb
->len
< ETH_HLEN
)) {
2253 skb
= ieee80211_build_hdr(sdata
, skb
, info_flags
);
2257 dev
->stats
.tx_packets
++;
2258 dev
->stats
.tx_bytes
+= skb
->len
;
2259 dev
->trans_start
= jiffies
;
2261 ieee80211_xmit(sdata
, skb
);
2267 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
2268 * @skb: packet to be sent
2269 * @dev: incoming interface
2271 * On failure skb will be freed.
2273 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
2274 struct net_device
*dev
)
2276 __ieee80211_subif_start_xmit(skb
, dev
, 0);
2277 return NETDEV_TX_OK
;
2281 ieee80211_build_data_template(struct ieee80211_sub_if_data
*sdata
,
2282 struct sk_buff
*skb
, u32 info_flags
)
2284 struct ieee80211_hdr
*hdr
;
2285 struct ieee80211_tx_data tx
= {
2286 .local
= sdata
->local
,
2292 skb
= ieee80211_build_hdr(sdata
, skb
, info_flags
);
2296 hdr
= (void *)skb
->data
;
2297 tx
.sta
= sta_info_get(sdata
, hdr
->addr1
);
2300 if (ieee80211_tx_h_select_key(&tx
) != TX_CONTINUE
) {
2303 return ERR_PTR(-EINVAL
);
2312 * ieee80211_clear_tx_pending may not be called in a context where
2313 * it is possible that it packets could come in again.
2315 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
2317 struct sk_buff
*skb
;
2320 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2321 while ((skb
= skb_dequeue(&local
->pending
[i
])) != NULL
)
2322 ieee80211_free_txskb(&local
->hw
, skb
);
2327 * Returns false if the frame couldn't be transmitted but was queued instead,
2328 * which in this case means re-queued -- take as an indication to stop sending
2329 * more pending frames.
2331 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
2332 struct sk_buff
*skb
)
2334 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2335 struct ieee80211_sub_if_data
*sdata
;
2336 struct sta_info
*sta
;
2337 struct ieee80211_hdr
*hdr
;
2339 struct ieee80211_chanctx_conf
*chanctx_conf
;
2341 sdata
= vif_to_sdata(info
->control
.vif
);
2343 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
2344 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2345 if (unlikely(!chanctx_conf
)) {
2349 info
->band
= chanctx_conf
->def
.chan
->band
;
2350 result
= ieee80211_tx(sdata
, skb
, true);
2352 struct sk_buff_head skbs
;
2354 __skb_queue_head_init(&skbs
);
2355 __skb_queue_tail(&skbs
, skb
);
2357 hdr
= (struct ieee80211_hdr
*)skb
->data
;
2358 sta
= sta_info_get(sdata
, hdr
->addr1
);
2360 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
2367 * Transmit all pending packets. Called from tasklet.
2369 void ieee80211_tx_pending(unsigned long data
)
2371 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
2372 unsigned long flags
;
2378 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
2379 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2381 * If queue is stopped by something other than due to pending
2382 * frames, or we have no pending frames, proceed to next queue.
2384 if (local
->queue_stop_reasons
[i
] ||
2385 skb_queue_empty(&local
->pending
[i
]))
2388 while (!skb_queue_empty(&local
->pending
[i
])) {
2389 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
2390 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2392 if (WARN_ON(!info
->control
.vif
)) {
2393 ieee80211_free_txskb(&local
->hw
, skb
);
2397 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
2400 txok
= ieee80211_tx_pending_skb(local
, skb
);
2401 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
2407 if (skb_queue_empty(&local
->pending
[i
]))
2408 ieee80211_propagate_queue_wake(local
, i
);
2410 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
2415 /* functions for drivers to get certain frames */
2417 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2418 struct ps_data
*ps
, struct sk_buff
*skb
,
2423 int i
, have_bits
= 0, n1
, n2
;
2425 /* Generate bitmap for TIM only if there are any STAs in power save
2427 if (atomic_read(&ps
->num_sta_ps
) > 0)
2428 /* in the hope that this is faster than
2429 * checking byte-for-byte */
2430 have_bits
= !bitmap_empty((unsigned long *)ps
->tim
,
2431 IEEE80211_MAX_AID
+1);
2433 if (ps
->dtim_count
== 0)
2434 ps
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
2439 tim
= pos
= (u8
*) skb_put(skb
, 6);
2440 *pos
++ = WLAN_EID_TIM
;
2442 *pos
++ = ps
->dtim_count
;
2443 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
2445 if (ps
->dtim_count
== 0 && !skb_queue_empty(&ps
->bc_buf
))
2448 ps
->dtim_bc_mc
= aid0
== 1;
2451 /* Find largest even number N1 so that bits numbered 1 through
2452 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2453 * (N2 + 1) x 8 through 2007 are 0. */
2455 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
2462 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
2469 /* Bitmap control */
2471 /* Part Virt Bitmap */
2472 skb_put(skb
, n2
- n1
);
2473 memcpy(pos
, ps
->tim
+ n1
, n2
- n1
+ 1);
2475 tim
[1] = n2
- n1
+ 4;
2477 *pos
++ = aid0
; /* Bitmap control */
2478 *pos
++ = 0; /* Part Virt Bitmap */
2482 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2483 struct ps_data
*ps
, struct sk_buff
*skb
,
2486 struct ieee80211_local
*local
= sdata
->local
;
2489 * Not very nice, but we want to allow the driver to call
2490 * ieee80211_beacon_get() as a response to the set_tim()
2491 * callback. That, however, is already invoked under the
2492 * sta_lock to guarantee consistent and race-free update
2493 * of the tim bitmap in mac80211 and the driver.
2495 if (local
->tim_in_locked_section
) {
2496 __ieee80211_beacon_add_tim(sdata
, ps
, skb
, is_template
);
2498 spin_lock_bh(&local
->tim_lock
);
2499 __ieee80211_beacon_add_tim(sdata
, ps
, skb
, is_template
);
2500 spin_unlock_bh(&local
->tim_lock
);
2506 static void ieee80211_set_csa(struct ieee80211_sub_if_data
*sdata
,
2507 struct beacon_data
*beacon
)
2509 struct probe_resp
*resp
;
2511 size_t beacon_data_len
;
2513 u8 count
= beacon
->csa_current_counter
;
2515 switch (sdata
->vif
.type
) {
2516 case NL80211_IFTYPE_AP
:
2517 beacon_data
= beacon
->tail
;
2518 beacon_data_len
= beacon
->tail_len
;
2520 case NL80211_IFTYPE_ADHOC
:
2521 beacon_data
= beacon
->head
;
2522 beacon_data_len
= beacon
->head_len
;
2524 case NL80211_IFTYPE_MESH_POINT
:
2525 beacon_data
= beacon
->head
;
2526 beacon_data_len
= beacon
->head_len
;
2533 for (i
= 0; i
< IEEE80211_MAX_CSA_COUNTERS_NUM
; ++i
) {
2534 resp
= rcu_dereference(sdata
->u
.ap
.probe_resp
);
2536 if (beacon
->csa_counter_offsets
[i
]) {
2537 if (WARN_ON_ONCE(beacon
->csa_counter_offsets
[i
] >=
2543 beacon_data
[beacon
->csa_counter_offsets
[i
]] = count
;
2546 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
&& resp
)
2547 resp
->data
[resp
->csa_counter_offsets
[i
]] = count
;
2552 u8
ieee80211_csa_update_counter(struct ieee80211_vif
*vif
)
2554 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2555 struct beacon_data
*beacon
= NULL
;
2560 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
2561 beacon
= rcu_dereference(sdata
->u
.ap
.beacon
);
2562 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
2563 beacon
= rcu_dereference(sdata
->u
.ibss
.presp
);
2564 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
2565 beacon
= rcu_dereference(sdata
->u
.mesh
.beacon
);
2570 beacon
->csa_current_counter
--;
2572 /* the counter should never reach 0 */
2573 WARN_ON_ONCE(!beacon
->csa_current_counter
);
2574 count
= beacon
->csa_current_counter
;
2580 EXPORT_SYMBOL(ieee80211_csa_update_counter
);
2582 bool ieee80211_csa_is_complete(struct ieee80211_vif
*vif
)
2584 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2585 struct beacon_data
*beacon
= NULL
;
2587 size_t beacon_data_len
;
2590 if (!ieee80211_sdata_running(sdata
))
2594 if (vif
->type
== NL80211_IFTYPE_AP
) {
2595 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2597 beacon
= rcu_dereference(ap
->beacon
);
2598 if (WARN_ON(!beacon
|| !beacon
->tail
))
2600 beacon_data
= beacon
->tail
;
2601 beacon_data_len
= beacon
->tail_len
;
2602 } else if (vif
->type
== NL80211_IFTYPE_ADHOC
) {
2603 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2605 beacon
= rcu_dereference(ifibss
->presp
);
2609 beacon_data
= beacon
->head
;
2610 beacon_data_len
= beacon
->head_len
;
2611 } else if (vif
->type
== NL80211_IFTYPE_MESH_POINT
) {
2612 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2614 beacon
= rcu_dereference(ifmsh
->beacon
);
2618 beacon_data
= beacon
->head
;
2619 beacon_data_len
= beacon
->head_len
;
2625 if (!beacon
->csa_counter_offsets
[0])
2628 if (WARN_ON_ONCE(beacon
->csa_counter_offsets
[0] > beacon_data_len
))
2631 if (beacon_data
[beacon
->csa_counter_offsets
[0]] == 1)
2638 EXPORT_SYMBOL(ieee80211_csa_is_complete
);
2640 static struct sk_buff
*
2641 __ieee80211_beacon_get(struct ieee80211_hw
*hw
,
2642 struct ieee80211_vif
*vif
,
2643 struct ieee80211_mutable_offsets
*offs
,
2646 struct ieee80211_local
*local
= hw_to_local(hw
);
2647 struct beacon_data
*beacon
= NULL
;
2648 struct sk_buff
*skb
= NULL
;
2649 struct ieee80211_tx_info
*info
;
2650 struct ieee80211_sub_if_data
*sdata
= NULL
;
2651 enum ieee80211_band band
;
2652 struct ieee80211_tx_rate_control txrc
;
2653 struct ieee80211_chanctx_conf
*chanctx_conf
;
2654 int csa_off_base
= 0;
2658 sdata
= vif_to_sdata(vif
);
2659 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2661 if (!ieee80211_sdata_running(sdata
) || !chanctx_conf
)
2665 memset(offs
, 0, sizeof(*offs
));
2667 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2668 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2670 beacon
= rcu_dereference(ap
->beacon
);
2672 if (beacon
->csa_counter_offsets
[0]) {
2674 ieee80211_csa_update_counter(vif
);
2676 ieee80211_set_csa(sdata
, beacon
);
2680 * headroom, head length,
2681 * tail length and maximum TIM length
2683 skb
= dev_alloc_skb(local
->tx_headroom
+
2685 beacon
->tail_len
+ 256 +
2686 local
->hw
.extra_beacon_tailroom
);
2690 skb_reserve(skb
, local
->tx_headroom
);
2691 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
2694 ieee80211_beacon_add_tim(sdata
, &ap
->ps
, skb
,
2698 offs
->tim_offset
= beacon
->head_len
;
2699 offs
->tim_length
= skb
->len
- beacon
->head_len
;
2701 /* for AP the csa offsets are from tail */
2702 csa_off_base
= skb
->len
;
2706 memcpy(skb_put(skb
, beacon
->tail_len
),
2707 beacon
->tail
, beacon
->tail_len
);
2710 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2711 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2712 struct ieee80211_hdr
*hdr
;
2714 beacon
= rcu_dereference(ifibss
->presp
);
2718 if (beacon
->csa_counter_offsets
[0]) {
2720 ieee80211_csa_update_counter(vif
);
2722 ieee80211_set_csa(sdata
, beacon
);
2725 skb
= dev_alloc_skb(local
->tx_headroom
+ beacon
->head_len
+
2726 local
->hw
.extra_beacon_tailroom
);
2729 skb_reserve(skb
, local
->tx_headroom
);
2730 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
2733 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2734 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2735 IEEE80211_STYPE_BEACON
);
2736 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2737 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2739 beacon
= rcu_dereference(ifmsh
->beacon
);
2743 if (beacon
->csa_counter_offsets
[0]) {
2745 /* TODO: For mesh csa_counter is in TU, so
2746 * decrementing it by one isn't correct, but
2747 * for now we leave it consistent with overall
2748 * mac80211's behavior.
2750 ieee80211_csa_update_counter(vif
);
2752 ieee80211_set_csa(sdata
, beacon
);
2755 if (ifmsh
->sync_ops
)
2756 ifmsh
->sync_ops
->adjust_tbtt(sdata
, beacon
);
2758 skb
= dev_alloc_skb(local
->tx_headroom
+
2762 local
->hw
.extra_beacon_tailroom
);
2765 skb_reserve(skb
, local
->tx_headroom
);
2766 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
2768 ieee80211_beacon_add_tim(sdata
, &ifmsh
->ps
, skb
, is_template
);
2771 offs
->tim_offset
= beacon
->head_len
;
2772 offs
->tim_length
= skb
->len
- beacon
->head_len
;
2775 memcpy(skb_put(skb
, beacon
->tail_len
), beacon
->tail
,
2783 if (offs
&& beacon
) {
2786 for (i
= 0; i
< IEEE80211_MAX_CSA_COUNTERS_NUM
; i
++) {
2787 u16 csa_off
= beacon
->csa_counter_offsets
[i
];
2792 offs
->csa_counter_offs
[i
] = csa_off_base
+ csa_off
;
2796 band
= chanctx_conf
->def
.chan
->band
;
2798 info
= IEEE80211_SKB_CB(skb
);
2800 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
2801 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
2804 memset(&txrc
, 0, sizeof(txrc
));
2806 txrc
.sband
= local
->hw
.wiphy
->bands
[band
];
2807 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
2809 txrc
.reported_rate
.idx
= -1;
2810 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
2811 if (txrc
.rate_idx_mask
== (1 << txrc
.sband
->n_bitrates
) - 1)
2812 txrc
.max_rate_idx
= -1;
2814 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
2816 rate_control_get_rate(sdata
, NULL
, &txrc
);
2818 info
->control
.vif
= vif
;
2820 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
2821 IEEE80211_TX_CTL_ASSIGN_SEQ
|
2822 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
2830 ieee80211_beacon_get_template(struct ieee80211_hw
*hw
,
2831 struct ieee80211_vif
*vif
,
2832 struct ieee80211_mutable_offsets
*offs
)
2834 return __ieee80211_beacon_get(hw
, vif
, offs
, true);
2836 EXPORT_SYMBOL(ieee80211_beacon_get_template
);
2838 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
2839 struct ieee80211_vif
*vif
,
2840 u16
*tim_offset
, u16
*tim_length
)
2842 struct ieee80211_mutable_offsets offs
= {};
2843 struct sk_buff
*bcn
= __ieee80211_beacon_get(hw
, vif
, &offs
, false);
2846 *tim_offset
= offs
.tim_offset
;
2849 *tim_length
= offs
.tim_length
;
2853 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
2855 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
2856 struct ieee80211_vif
*vif
)
2858 struct ieee80211_if_ap
*ap
= NULL
;
2859 struct sk_buff
*skb
= NULL
;
2860 struct probe_resp
*presp
= NULL
;
2861 struct ieee80211_hdr
*hdr
;
2862 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2864 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
2870 presp
= rcu_dereference(ap
->probe_resp
);
2874 skb
= dev_alloc_skb(presp
->len
);
2878 memcpy(skb_put(skb
, presp
->len
), presp
->data
, presp
->len
);
2880 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2881 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
2887 EXPORT_SYMBOL(ieee80211_proberesp_get
);
2889 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
2890 struct ieee80211_vif
*vif
)
2892 struct ieee80211_sub_if_data
*sdata
;
2893 struct ieee80211_if_managed
*ifmgd
;
2894 struct ieee80211_pspoll
*pspoll
;
2895 struct ieee80211_local
*local
;
2896 struct sk_buff
*skb
;
2898 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2901 sdata
= vif_to_sdata(vif
);
2902 ifmgd
= &sdata
->u
.mgd
;
2903 local
= sdata
->local
;
2905 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
2909 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2911 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
2912 memset(pspoll
, 0, sizeof(*pspoll
));
2913 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
2914 IEEE80211_STYPE_PSPOLL
);
2915 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
2917 /* aid in PS-Poll has its two MSBs each set to 1 */
2918 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
2920 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
2921 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
2925 EXPORT_SYMBOL(ieee80211_pspoll_get
);
2927 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
2928 struct ieee80211_vif
*vif
)
2930 struct ieee80211_hdr_3addr
*nullfunc
;
2931 struct ieee80211_sub_if_data
*sdata
;
2932 struct ieee80211_if_managed
*ifmgd
;
2933 struct ieee80211_local
*local
;
2934 struct sk_buff
*skb
;
2936 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2939 sdata
= vif_to_sdata(vif
);
2940 ifmgd
= &sdata
->u
.mgd
;
2941 local
= sdata
->local
;
2943 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*nullfunc
));
2947 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2949 nullfunc
= (struct ieee80211_hdr_3addr
*) skb_put(skb
,
2951 memset(nullfunc
, 0, sizeof(*nullfunc
));
2952 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
2953 IEEE80211_STYPE_NULLFUNC
|
2954 IEEE80211_FCTL_TODS
);
2955 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
2956 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
2957 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
2961 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
2963 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
2965 const u8
*ssid
, size_t ssid_len
,
2968 struct ieee80211_local
*local
= hw_to_local(hw
);
2969 struct ieee80211_hdr_3addr
*hdr
;
2970 struct sk_buff
*skb
;
2974 ie_ssid_len
= 2 + ssid_len
;
2976 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
2977 ie_ssid_len
+ tailroom
);
2981 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2983 hdr
= (struct ieee80211_hdr_3addr
*) skb_put(skb
, sizeof(*hdr
));
2984 memset(hdr
, 0, sizeof(*hdr
));
2985 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2986 IEEE80211_STYPE_PROBE_REQ
);
2987 eth_broadcast_addr(hdr
->addr1
);
2988 memcpy(hdr
->addr2
, src_addr
, ETH_ALEN
);
2989 eth_broadcast_addr(hdr
->addr3
);
2991 pos
= skb_put(skb
, ie_ssid_len
);
2992 *pos
++ = WLAN_EID_SSID
;
2995 memcpy(pos
, ssid
, ssid_len
);
3000 EXPORT_SYMBOL(ieee80211_probereq_get
);
3002 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
3003 const void *frame
, size_t frame_len
,
3004 const struct ieee80211_tx_info
*frame_txctl
,
3005 struct ieee80211_rts
*rts
)
3007 const struct ieee80211_hdr
*hdr
= frame
;
3009 rts
->frame_control
=
3010 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
3011 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
3013 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
3014 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
3016 EXPORT_SYMBOL(ieee80211_rts_get
);
3018 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
3019 const void *frame
, size_t frame_len
,
3020 const struct ieee80211_tx_info
*frame_txctl
,
3021 struct ieee80211_cts
*cts
)
3023 const struct ieee80211_hdr
*hdr
= frame
;
3025 cts
->frame_control
=
3026 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
3027 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
3028 frame_len
, frame_txctl
);
3029 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
3031 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
3034 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
3035 struct ieee80211_vif
*vif
)
3037 struct ieee80211_local
*local
= hw_to_local(hw
);
3038 struct sk_buff
*skb
= NULL
;
3039 struct ieee80211_tx_data tx
;
3040 struct ieee80211_sub_if_data
*sdata
;
3042 struct ieee80211_tx_info
*info
;
3043 struct ieee80211_chanctx_conf
*chanctx_conf
;
3045 sdata
= vif_to_sdata(vif
);
3048 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3053 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
3054 struct beacon_data
*beacon
=
3055 rcu_dereference(sdata
->u
.ap
.beacon
);
3057 if (!beacon
|| !beacon
->head
)
3060 ps
= &sdata
->u
.ap
.ps
;
3061 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
3062 ps
= &sdata
->u
.mesh
.ps
;
3067 if (ps
->dtim_count
!= 0 || !ps
->dtim_bc_mc
)
3068 goto out
; /* send buffered bc/mc only after DTIM beacon */
3071 skb
= skb_dequeue(&ps
->bc_buf
);
3074 local
->total_ps_buffered
--;
3076 if (!skb_queue_empty(&ps
->bc_buf
) && skb
->len
>= 2) {
3077 struct ieee80211_hdr
*hdr
=
3078 (struct ieee80211_hdr
*) skb
->data
;
3079 /* more buffered multicast/broadcast frames ==> set
3080 * MoreData flag in IEEE 802.11 header to inform PS
3082 hdr
->frame_control
|=
3083 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
3086 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
3087 sdata
= IEEE80211_DEV_TO_SUB_IF(skb
->dev
);
3088 if (!ieee80211_tx_prepare(sdata
, &tx
, skb
))
3090 dev_kfree_skb_any(skb
);
3093 info
= IEEE80211_SKB_CB(skb
);
3095 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
3096 info
->band
= chanctx_conf
->def
.chan
->band
;
3098 if (invoke_tx_handlers(&tx
))
3105 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
3107 int ieee80211_reserve_tid(struct ieee80211_sta
*pubsta
, u8 tid
)
3109 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
3110 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
3111 struct ieee80211_local
*local
= sdata
->local
;
3115 lockdep_assert_held(&local
->sta_mtx
);
3117 /* only some cases are supported right now */
3118 switch (sdata
->vif
.type
) {
3119 case NL80211_IFTYPE_STATION
:
3120 case NL80211_IFTYPE_AP
:
3121 case NL80211_IFTYPE_AP_VLAN
:
3128 if (WARN_ON(tid
>= IEEE80211_NUM_UPS
))
3131 if (sta
->reserved_tid
== tid
) {
3136 if (sta
->reserved_tid
!= IEEE80211_TID_UNRESERVED
) {
3137 sdata_err(sdata
, "TID reservation already active\n");
3142 ieee80211_stop_vif_queues(sdata
->local
, sdata
,
3143 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID
);
3147 /* Tear down BA sessions so we stop aggregating on this TID */
3148 if (local
->hw
.flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
3149 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
3150 __ieee80211_stop_tx_ba_session(sta
, tid
,
3151 AGG_STOP_LOCAL_REQUEST
);
3154 queues
= BIT(sdata
->vif
.hw_queue
[ieee802_1d_to_ac
[tid
]]);
3155 __ieee80211_flush_queues(local
, sdata
, queues
, false);
3157 sta
->reserved_tid
= tid
;
3159 ieee80211_wake_vif_queues(local
, sdata
,
3160 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID
);
3162 if (local
->hw
.flags
& IEEE80211_HW_AMPDU_AGGREGATION
)
3163 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
3169 EXPORT_SYMBOL(ieee80211_reserve_tid
);
3171 void ieee80211_unreserve_tid(struct ieee80211_sta
*pubsta
, u8 tid
)
3173 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
3174 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
3176 lockdep_assert_held(&sdata
->local
->sta_mtx
);
3178 /* only some cases are supported right now */
3179 switch (sdata
->vif
.type
) {
3180 case NL80211_IFTYPE_STATION
:
3181 case NL80211_IFTYPE_AP
:
3182 case NL80211_IFTYPE_AP_VLAN
:
3189 if (tid
!= sta
->reserved_tid
) {
3190 sdata_err(sdata
, "TID to unreserve (%d) isn't reserved\n", tid
);
3194 sta
->reserved_tid
= IEEE80211_TID_UNRESERVED
;
3196 EXPORT_SYMBOL(ieee80211_unreserve_tid
);
3198 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data
*sdata
,
3199 struct sk_buff
*skb
, int tid
,
3200 enum ieee80211_band band
)
3202 int ac
= ieee802_1d_to_ac
[tid
& 7];
3204 skb_set_mac_header(skb
, 0);
3205 skb_set_network_header(skb
, 0);
3206 skb_set_transport_header(skb
, 0);
3208 skb_set_queue_mapping(skb
, ac
);
3209 skb
->priority
= tid
;
3211 skb
->dev
= sdata
->dev
;
3214 * The other path calling ieee80211_xmit is from the tasklet,
3215 * and while we can handle concurrent transmissions locking
3216 * requirements are that we do not come into tx with bhs on.
3219 IEEE80211_SKB_CB(skb
)->band
= band
;
3220 ieee80211_xmit(sdata
, skb
);