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 <linux/time.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
)
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
);
254 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
255 ieee80211_queue_work(&local
->hw
,
256 &local
->dynamic_ps_disable_work
);
259 /* Don't restart the timer if we're not disassociated */
260 if (!ifmgd
->associated
)
263 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
264 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
269 static ieee80211_tx_result debug_noinline
270 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data
*tx
)
273 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
274 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
277 if (unlikely(info
->flags
& IEEE80211_TX_CTL_INJECTED
))
280 if (unlikely(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
)) &&
281 test_bit(SDATA_STATE_OFFCHANNEL
, &tx
->sdata
->state
) &&
282 !ieee80211_is_probe_req(hdr
->frame_control
) &&
283 !ieee80211_is_nullfunc(hdr
->frame_control
))
285 * When software scanning only nullfunc frames (to notify
286 * the sleep state to the AP) and probe requests (for the
287 * active scan) are allowed, all other frames should not be
288 * sent and we should not get here, but if we do
289 * nonetheless, drop them to avoid sending them
290 * off-channel. See the link below and
291 * ieee80211_start_scan() for more.
293 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
297 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
300 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
303 if (tx
->flags
& IEEE80211_TX_PS_BUFFERED
)
307 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
309 if (likely(tx
->flags
& IEEE80211_TX_UNICAST
)) {
310 if (unlikely(!assoc
&&
311 ieee80211_is_data(hdr
->frame_control
))) {
312 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
313 sdata_info(tx
->sdata
,
314 "dropped data frame to not associated station %pM\n",
317 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
320 } else if (unlikely(tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
321 ieee80211_is_data(hdr
->frame_control
) &&
322 !atomic_read(&tx
->sdata
->u
.ap
.num_mcast_sta
))) {
324 * No associated STAs - no need to send multicast
333 /* This function is called whenever the AP is about to exceed the maximum limit
334 * of buffered frames for power saving STAs. This situation should not really
335 * happen often during normal operation, so dropping the oldest buffered packet
336 * from each queue should be OK to make some room for new frames. */
337 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
339 int total
= 0, purged
= 0;
341 struct ieee80211_sub_if_data
*sdata
;
342 struct sta_info
*sta
;
344 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
347 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
348 ps
= &sdata
->u
.ap
.ps
;
349 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
350 ps
= &sdata
->u
.mesh
.ps
;
354 skb
= skb_dequeue(&ps
->bc_buf
);
359 total
+= skb_queue_len(&ps
->bc_buf
);
363 * Drop one frame from each station from the lowest-priority
364 * AC that has frames at all.
366 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
369 for (ac
= IEEE80211_AC_BK
; ac
>= IEEE80211_AC_VO
; ac
--) {
370 skb
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
371 total
+= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
374 ieee80211_free_txskb(&local
->hw
, skb
);
380 local
->total_ps_buffered
= total
;
381 ps_dbg_hw(&local
->hw
, "PS buffers full - purged %d frames\n", purged
);
384 static ieee80211_tx_result
385 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data
*tx
)
387 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
388 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
392 * broadcast/multicast frame
394 * If any of the associated/peer stations is in power save mode,
395 * the frame is buffered to be sent after DTIM beacon frame.
396 * This is done either by the hardware or us.
399 /* powersaving STAs currently only in AP/VLAN/mesh mode */
400 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
401 tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
405 ps
= &tx
->sdata
->bss
->ps
;
406 } else if (ieee80211_vif_is_mesh(&tx
->sdata
->vif
)) {
407 ps
= &tx
->sdata
->u
.mesh
.ps
;
413 /* no buffering for ordered frames */
414 if (ieee80211_has_order(hdr
->frame_control
))
417 if (tx
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
418 info
->hw_queue
= tx
->sdata
->vif
.cab_queue
;
420 /* no stations in PS mode */
421 if (!atomic_read(&ps
->num_sta_ps
))
424 info
->flags
|= IEEE80211_TX_CTL_SEND_AFTER_DTIM
;
426 /* device releases frame after DTIM beacon */
427 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
))
430 /* buffered in mac80211 */
431 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
432 purge_old_ps_buffers(tx
->local
);
434 if (skb_queue_len(&ps
->bc_buf
) >= AP_MAX_BC_BUFFER
) {
436 "BC TX buffer full - dropping the oldest frame\n");
437 dev_kfree_skb(skb_dequeue(&ps
->bc_buf
));
439 tx
->local
->total_ps_buffered
++;
441 skb_queue_tail(&ps
->bc_buf
, tx
->skb
);
446 static int ieee80211_use_mfp(__le16 fc
, struct sta_info
*sta
,
449 if (!ieee80211_is_mgmt(fc
))
452 if (sta
== NULL
|| !test_sta_flag(sta
, WLAN_STA_MFP
))
455 if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr
*)
462 static ieee80211_tx_result
463 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data
*tx
)
465 struct sta_info
*sta
= tx
->sta
;
466 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
467 struct ieee80211_local
*local
= tx
->local
;
472 if (unlikely((test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
473 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) &&
474 !(info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
))) {
475 int ac
= skb_get_queue_mapping(tx
->skb
);
477 ps_dbg(sta
->sdata
, "STA %pM aid %d: PS buffer for AC %d\n",
478 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
479 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
480 purge_old_ps_buffers(tx
->local
);
482 /* sync with ieee80211_sta_ps_deliver_wakeup */
483 spin_lock(&sta
->ps_lock
);
485 * STA woke up the meantime and all the frames on ps_tx_buf have
486 * been queued to pending queue. No reordering can happen, go
487 * ahead and Tx the packet.
489 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
) &&
490 !test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) {
491 spin_unlock(&sta
->ps_lock
);
495 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
496 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
498 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
500 ieee80211_free_txskb(&local
->hw
, old
);
502 tx
->local
->total_ps_buffered
++;
504 info
->control
.jiffies
= jiffies
;
505 info
->control
.vif
= &tx
->sdata
->vif
;
506 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
507 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
508 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
509 spin_unlock(&sta
->ps_lock
);
511 if (!timer_pending(&local
->sta_cleanup
))
512 mod_timer(&local
->sta_cleanup
,
513 round_jiffies(jiffies
+
514 STA_INFO_CLEANUP_INTERVAL
));
517 * We queued up some frames, so the TIM bit might
518 * need to be set, recalculate it.
520 sta_info_recalc_tim(sta
);
523 } else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
525 "STA %pM in PS mode, but polling/in SP -> send frame\n",
532 static ieee80211_tx_result debug_noinline
533 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
535 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
536 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
538 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
541 /* only deauth, disassoc and action are bufferable MMPDUs */
542 if (ieee80211_is_mgmt(hdr
->frame_control
) &&
543 !ieee80211_is_deauth(hdr
->frame_control
) &&
544 !ieee80211_is_disassoc(hdr
->frame_control
) &&
545 !ieee80211_is_action(hdr
->frame_control
)) {
546 if (tx
->flags
& IEEE80211_TX_UNICAST
)
547 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
551 if (tx
->flags
& IEEE80211_TX_UNICAST
)
552 return ieee80211_tx_h_unicast_ps_buf(tx
);
554 return ieee80211_tx_h_multicast_ps_buf(tx
);
557 static ieee80211_tx_result debug_noinline
558 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
560 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
562 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
)) {
563 if (tx
->sdata
->control_port_no_encrypt
)
564 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
565 info
->control
.flags
|= IEEE80211_TX_CTRL_PORT_CTRL_PROTO
;
571 static ieee80211_tx_result debug_noinline
572 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
574 struct ieee80211_key
*key
;
575 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
576 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
578 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
))
581 (key
= rcu_dereference(tx
->sta
->ptk
[tx
->sta
->ptk_idx
])))
583 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
584 is_multicast_ether_addr(hdr
->addr1
) &&
585 ieee80211_is_robust_mgmt_frame(hdr
) &&
586 (key
= rcu_dereference(tx
->sdata
->default_mgmt_key
)))
588 else if (is_multicast_ether_addr(hdr
->addr1
) &&
589 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
591 else if (!is_multicast_ether_addr(hdr
->addr1
) &&
592 (key
= rcu_dereference(tx
->sdata
->default_unicast_key
)))
594 else if (info
->flags
& IEEE80211_TX_CTL_INJECTED
)
596 else if (!tx
->sdata
->drop_unencrypted
)
598 else if (tx
->skb
->protocol
== tx
->sdata
->control_port_protocol
)
600 else if (ieee80211_is_robust_mgmt_frame(hdr
) &&
601 !(ieee80211_is_action(hdr
->frame_control
) &&
602 tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_MFP
)))
604 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
605 !ieee80211_is_robust_mgmt_frame(hdr
))
608 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_unencrypted
);
613 bool skip_hw
= false;
615 tx
->key
->tx_rx_count
++;
616 /* TODO: add threshold stuff again */
618 switch (tx
->key
->conf
.cipher
) {
619 case WLAN_CIPHER_SUITE_WEP40
:
620 case WLAN_CIPHER_SUITE_WEP104
:
621 case WLAN_CIPHER_SUITE_TKIP
:
622 if (!ieee80211_is_data_present(hdr
->frame_control
))
625 case WLAN_CIPHER_SUITE_CCMP
:
626 if (!ieee80211_is_data_present(hdr
->frame_control
) &&
627 !ieee80211_use_mfp(hdr
->frame_control
, tx
->sta
,
631 skip_hw
= (tx
->key
->conf
.flags
&
632 IEEE80211_KEY_FLAG_SW_MGMT_TX
) &&
633 ieee80211_is_mgmt(hdr
->frame_control
);
635 case WLAN_CIPHER_SUITE_AES_CMAC
:
636 if (!ieee80211_is_mgmt(hdr
->frame_control
))
641 if (unlikely(tx
->key
&& tx
->key
->flags
& KEY_FLAG_TAINTED
&&
642 !ieee80211_is_deauth(hdr
->frame_control
)))
645 if (!skip_hw
&& tx
->key
&&
646 tx
->key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
)
647 info
->control
.hw_key
= &tx
->key
->conf
;
653 static ieee80211_tx_result debug_noinline
654 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data
*tx
)
656 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
657 struct ieee80211_hdr
*hdr
= (void *)tx
->skb
->data
;
658 struct ieee80211_supported_band
*sband
;
660 struct ieee80211_tx_rate_control txrc
;
661 struct ieee80211_sta_rates
*ratetbl
= NULL
;
664 memset(&txrc
, 0, sizeof(txrc
));
666 sband
= tx
->local
->hw
.wiphy
->bands
[info
->band
];
668 len
= min_t(u32
, tx
->skb
->len
+ FCS_LEN
,
669 tx
->local
->hw
.wiphy
->frag_threshold
);
671 /* set up the tx rate control struct we give the RC algo */
672 txrc
.hw
= &tx
->local
->hw
;
674 txrc
.bss_conf
= &tx
->sdata
->vif
.bss_conf
;
676 txrc
.reported_rate
.idx
= -1;
677 txrc
.rate_idx_mask
= tx
->sdata
->rc_rateidx_mask
[info
->band
];
678 if (txrc
.rate_idx_mask
== (1 << sband
->n_bitrates
) - 1)
679 txrc
.max_rate_idx
= -1;
681 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
683 if (tx
->sdata
->rc_has_mcs_mask
[info
->band
])
684 txrc
.rate_idx_mcs_mask
=
685 tx
->sdata
->rc_rateidx_mcs_mask
[info
->band
];
687 txrc
.bss
= (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
688 tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
||
689 tx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
);
691 /* set up RTS protection if desired */
692 if (len
> tx
->local
->hw
.wiphy
->rts_threshold
) {
696 info
->control
.use_rts
= txrc
.rts
;
697 info
->control
.use_cts_prot
= tx
->sdata
->vif
.bss_conf
.use_cts_prot
;
700 * Use short preamble if the BSS can handle it, but not for
701 * management frames unless we know the receiver can handle
702 * that -- the management frame might be to a station that
703 * just wants a probe response.
705 if (tx
->sdata
->vif
.bss_conf
.use_short_preamble
&&
706 (ieee80211_is_data(hdr
->frame_control
) ||
707 (tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_SHORT_PREAMBLE
))))
708 txrc
.short_preamble
= true;
710 info
->control
.short_preamble
= txrc
.short_preamble
;
713 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
716 * Lets not bother rate control if we're associated and cannot
717 * talk to the sta. This should not happen.
719 if (WARN(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
) && assoc
&&
720 !rate_usable_index_exists(sband
, &tx
->sta
->sta
),
721 "%s: Dropped data frame as no usable bitrate found while "
722 "scanning and associated. Target station: "
723 "%pM on %d GHz band\n",
724 tx
->sdata
->name
, hdr
->addr1
,
729 * If we're associated with the sta at this point we know we can at
730 * least send the frame at the lowest bit rate.
732 rate_control_get_rate(tx
->sdata
, tx
->sta
, &txrc
);
734 if (tx
->sta
&& !info
->control
.skip_table
)
735 ratetbl
= rcu_dereference(tx
->sta
->sta
.rates
);
737 if (unlikely(info
->control
.rates
[0].idx
< 0)) {
739 struct ieee80211_tx_rate rate
= {
740 .idx
= ratetbl
->rate
[0].idx
,
741 .flags
= ratetbl
->rate
[0].flags
,
742 .count
= ratetbl
->rate
[0].count
745 if (ratetbl
->rate
[0].idx
< 0)
753 tx
->rate
= info
->control
.rates
[0];
756 if (txrc
.reported_rate
.idx
< 0) {
757 txrc
.reported_rate
= tx
->rate
;
758 if (tx
->sta
&& ieee80211_is_data(hdr
->frame_control
))
759 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
761 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
766 if (unlikely(!info
->control
.rates
[0].count
))
767 info
->control
.rates
[0].count
= 1;
769 if (WARN_ON_ONCE((info
->control
.rates
[0].count
> 1) &&
770 (info
->flags
& IEEE80211_TX_CTL_NO_ACK
)))
771 info
->control
.rates
[0].count
= 1;
776 static ieee80211_tx_result debug_noinline
777 ieee80211_tx_h_sequence(struct ieee80211_tx_data
*tx
)
779 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
780 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
786 * Packet injection may want to control the sequence
787 * number, if we have no matching interface then we
788 * neither assign one ourselves nor ask the driver to.
790 if (unlikely(info
->control
.vif
->type
== NL80211_IFTYPE_MONITOR
))
793 if (unlikely(ieee80211_is_ctl(hdr
->frame_control
)))
796 if (ieee80211_hdrlen(hdr
->frame_control
) < 24)
799 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
803 * Anything but QoS data that has a sequence number field
804 * (is long enough) gets a sequence number from the global
805 * counter. QoS data frames with a multicast destination
806 * also use the global counter (802.11-2012 9.3.2.10).
808 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
809 is_multicast_ether_addr(hdr
->addr1
)) {
810 /* driver should assign sequence number */
811 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
812 /* for pure STA mode without beacons, we can do it */
813 hdr
->seq_ctrl
= cpu_to_le16(tx
->sdata
->sequence_number
);
814 tx
->sdata
->sequence_number
+= 0x10;
819 * This should be true for injected/management frames only, for
820 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
821 * above since they are not QoS-data frames.
826 /* include per-STA, per-TID sequence counter */
828 qc
= ieee80211_get_qos_ctl(hdr
);
829 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
830 seq
= &tx
->sta
->tid_seq
[tid
];
832 hdr
->seq_ctrl
= cpu_to_le16(*seq
);
834 /* Increase the sequence number. */
835 *seq
= (*seq
+ 0x10) & IEEE80211_SCTL_SEQ
;
840 static int ieee80211_fragment(struct ieee80211_tx_data
*tx
,
841 struct sk_buff
*skb
, int hdrlen
,
844 struct ieee80211_local
*local
= tx
->local
;
845 struct ieee80211_tx_info
*info
;
847 int per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
848 int pos
= hdrlen
+ per_fragm
;
849 int rem
= skb
->len
- hdrlen
- per_fragm
;
851 if (WARN_ON(rem
< 0))
854 /* first fragment was already added to queue by caller */
857 int fraglen
= per_fragm
;
862 tmp
= dev_alloc_skb(local
->tx_headroom
+
864 tx
->sdata
->encrypt_headroom
+
865 IEEE80211_ENCRYPT_TAILROOM
);
869 __skb_queue_tail(&tx
->skbs
, tmp
);
872 local
->tx_headroom
+ tx
->sdata
->encrypt_headroom
);
874 /* copy control information */
875 memcpy(tmp
->cb
, skb
->cb
, sizeof(tmp
->cb
));
877 info
= IEEE80211_SKB_CB(tmp
);
878 info
->flags
&= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT
|
879 IEEE80211_TX_CTL_FIRST_FRAGMENT
);
882 info
->flags
|= IEEE80211_TX_CTL_MORE_FRAMES
;
884 skb_copy_queue_mapping(tmp
, skb
);
885 tmp
->priority
= skb
->priority
;
888 /* copy header and data */
889 memcpy(skb_put(tmp
, hdrlen
), skb
->data
, hdrlen
);
890 memcpy(skb_put(tmp
, fraglen
), skb
->data
+ pos
, fraglen
);
895 /* adjust first fragment's length */
896 skb_trim(skb
, hdrlen
+ per_fragm
);
900 static ieee80211_tx_result debug_noinline
901 ieee80211_tx_h_fragment(struct ieee80211_tx_data
*tx
)
903 struct sk_buff
*skb
= tx
->skb
;
904 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
905 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
906 int frag_threshold
= tx
->local
->hw
.wiphy
->frag_threshold
;
910 /* no matter what happens, tx->skb moves to tx->skbs */
911 __skb_queue_tail(&tx
->skbs
, skb
);
914 if (info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)
917 if (tx
->local
->ops
->set_frag_threshold
)
921 * Warn when submitting a fragmented A-MPDU frame and drop it.
922 * This scenario is handled in ieee80211_tx_prepare but extra
923 * caution taken here as fragmented ampdu may cause Tx stop.
925 if (WARN_ON(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
928 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
930 /* internal error, why isn't DONTFRAG set? */
931 if (WARN_ON(skb
->len
+ FCS_LEN
<= frag_threshold
))
935 * Now fragment the frame. This will allocate all the fragments and
936 * chain them (using skb as the first fragment) to skb->next.
937 * During transmission, we will remove the successfully transmitted
938 * fragments from this list. When the low-level driver rejects one
939 * of the fragments then we will simply pretend to accept the skb
940 * but store it away as pending.
942 if (ieee80211_fragment(tx
, skb
, hdrlen
, frag_threshold
))
945 /* update duration/seq/flags of fragments */
948 skb_queue_walk(&tx
->skbs
, skb
) {
949 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
951 hdr
= (void *)skb
->data
;
952 info
= IEEE80211_SKB_CB(skb
);
954 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
955 hdr
->frame_control
|= morefrags
;
957 * No multi-rate retries for fragmented frames, that
958 * would completely throw off the NAV at other STAs.
960 info
->control
.rates
[1].idx
= -1;
961 info
->control
.rates
[2].idx
= -1;
962 info
->control
.rates
[3].idx
= -1;
963 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 4);
964 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
966 hdr
->frame_control
&= ~morefrags
;
968 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
975 static ieee80211_tx_result debug_noinline
976 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
984 skb_queue_walk(&tx
->skbs
, skb
) {
985 ac
= skb_get_queue_mapping(skb
);
986 tx
->sta
->tx_fragments
++;
987 tx
->sta
->tx_bytes
[ac
] += skb
->len
;
990 tx
->sta
->tx_packets
[ac
]++;
995 static ieee80211_tx_result debug_noinline
996 ieee80211_tx_h_encrypt(struct ieee80211_tx_data
*tx
)
1001 switch (tx
->key
->conf
.cipher
) {
1002 case WLAN_CIPHER_SUITE_WEP40
:
1003 case WLAN_CIPHER_SUITE_WEP104
:
1004 return ieee80211_crypto_wep_encrypt(tx
);
1005 case WLAN_CIPHER_SUITE_TKIP
:
1006 return ieee80211_crypto_tkip_encrypt(tx
);
1007 case WLAN_CIPHER_SUITE_CCMP
:
1008 return ieee80211_crypto_ccmp_encrypt(tx
);
1009 case WLAN_CIPHER_SUITE_AES_CMAC
:
1010 return ieee80211_crypto_aes_cmac_encrypt(tx
);
1012 return ieee80211_crypto_hw_encrypt(tx
);
1018 static ieee80211_tx_result debug_noinline
1019 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data
*tx
)
1021 struct sk_buff
*skb
;
1022 struct ieee80211_hdr
*hdr
;
1026 skb_queue_walk(&tx
->skbs
, skb
) {
1027 hdr
= (void *) skb
->data
;
1028 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
)))
1029 break; /* must not overwrite AID */
1030 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1031 struct sk_buff
*next
= skb_queue_next(&tx
->skbs
, skb
);
1032 next_len
= next
->len
;
1035 group_addr
= is_multicast_ether_addr(hdr
->addr1
);
1038 ieee80211_duration(tx
, skb
, group_addr
, next_len
);
1044 /* actual transmit path */
1046 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data
*tx
,
1047 struct sk_buff
*skb
,
1048 struct ieee80211_tx_info
*info
,
1049 struct tid_ampdu_tx
*tid_tx
,
1052 bool queued
= false;
1053 bool reset_agg_timer
= false;
1054 struct sk_buff
*purge_skb
= NULL
;
1056 if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1057 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1058 reset_agg_timer
= true;
1059 } else if (test_bit(HT_AGG_STATE_WANT_START
, &tid_tx
->state
)) {
1061 * nothing -- this aggregation session is being started
1062 * but that might still fail with the driver
1065 spin_lock(&tx
->sta
->lock
);
1067 * Need to re-check now, because we may get here
1069 * 1) in the window during which the setup is actually
1070 * already done, but not marked yet because not all
1071 * packets are spliced over to the driver pending
1072 * queue yet -- if this happened we acquire the lock
1073 * either before or after the splice happens, but
1074 * need to recheck which of these cases happened.
1076 * 2) during session teardown, if the OPERATIONAL bit
1077 * was cleared due to the teardown but the pointer
1078 * hasn't been assigned NULL yet (or we loaded it
1079 * before it was assigned) -- in this case it may
1080 * now be NULL which means we should just let the
1081 * packet pass through because splicing the frames
1082 * back is already done.
1084 tid_tx
= rcu_dereference_protected_tid_tx(tx
->sta
, tid
);
1087 /* do nothing, let packet pass through */
1088 } else if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1089 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1090 reset_agg_timer
= true;
1093 info
->control
.vif
= &tx
->sdata
->vif
;
1094 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1095 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
1096 __skb_queue_tail(&tid_tx
->pending
, skb
);
1097 if (skb_queue_len(&tid_tx
->pending
) > STA_MAX_TX_BUFFER
)
1098 purge_skb
= __skb_dequeue(&tid_tx
->pending
);
1100 spin_unlock(&tx
->sta
->lock
);
1103 ieee80211_free_txskb(&tx
->local
->hw
, purge_skb
);
1106 /* reset session timer */
1107 if (reset_agg_timer
&& tid_tx
->timeout
)
1108 tid_tx
->last_tx
= jiffies
;
1116 static ieee80211_tx_result
1117 ieee80211_tx_prepare(struct ieee80211_sub_if_data
*sdata
,
1118 struct ieee80211_tx_data
*tx
,
1119 struct sk_buff
*skb
)
1121 struct ieee80211_local
*local
= sdata
->local
;
1122 struct ieee80211_hdr
*hdr
;
1123 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1127 memset(tx
, 0, sizeof(*tx
));
1131 __skb_queue_head_init(&tx
->skbs
);
1134 * If this flag is set to true anywhere, and we get here,
1135 * we are doing the needed processing, so remove the flag
1138 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1140 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1142 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1143 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1144 if (!tx
->sta
&& sdata
->dev
->ieee80211_ptr
->use_4addr
)
1146 } else if (info
->flags
& (IEEE80211_TX_CTL_INJECTED
|
1147 IEEE80211_TX_INTFL_NL80211_FRAME_TX
) ||
1148 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1149 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1152 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1154 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1155 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1156 (local
->hw
.flags
& IEEE80211_HW_AMPDU_AGGREGATION
) &&
1157 !(local
->hw
.flags
& IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
)) {
1158 struct tid_ampdu_tx
*tid_tx
;
1160 qc
= ieee80211_get_qos_ctl(hdr
);
1161 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
1163 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1167 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1170 if (unlikely(queued
))
1175 if (is_multicast_ether_addr(hdr
->addr1
)) {
1176 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1177 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1179 tx
->flags
|= IEEE80211_TX_UNICAST
;
1181 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1182 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1183 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1184 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1185 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1189 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1190 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
))
1191 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1193 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1198 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1199 struct ieee80211_vif
*vif
,
1200 struct ieee80211_sta
*sta
,
1201 struct sk_buff_head
*skbs
,
1204 struct ieee80211_tx_control control
;
1205 struct sk_buff
*skb
, *tmp
;
1206 unsigned long flags
;
1208 skb_queue_walk_safe(skbs
, skb
, tmp
) {
1209 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1210 int q
= info
->hw_queue
;
1212 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1213 if (WARN_ON_ONCE(q
>= local
->hw
.queues
)) {
1214 __skb_unlink(skb
, skbs
);
1215 ieee80211_free_txskb(&local
->hw
, skb
);
1220 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1221 if (local
->queue_stop_reasons
[q
] ||
1222 (!txpending
&& !skb_queue_empty(&local
->pending
[q
]))) {
1223 if (unlikely(info
->flags
&
1224 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
)) {
1225 if (local
->queue_stop_reasons
[q
] &
1226 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL
)) {
1228 * Drop off-channel frames if queues
1229 * are stopped for any reason other
1230 * than off-channel operation. Never
1233 spin_unlock_irqrestore(
1234 &local
->queue_stop_reason_lock
,
1236 ieee80211_purge_tx_queue(&local
->hw
,
1243 * Since queue is stopped, queue up frames for
1244 * later transmission from the tx-pending
1245 * tasklet when the queue is woken again.
1248 skb_queue_splice_init(skbs
,
1249 &local
->pending
[q
]);
1251 skb_queue_splice_tail_init(skbs
,
1252 &local
->pending
[q
]);
1254 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1259 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1261 info
->control
.vif
= vif
;
1264 __skb_unlink(skb
, skbs
);
1265 drv_tx(local
, &control
, skb
);
1272 * Returns false if the frame couldn't be transmitted but was queued instead.
1274 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1275 struct sk_buff_head
*skbs
, int led_len
,
1276 struct sta_info
*sta
, bool txpending
)
1278 struct ieee80211_tx_info
*info
;
1279 struct ieee80211_sub_if_data
*sdata
;
1280 struct ieee80211_vif
*vif
;
1281 struct ieee80211_sta
*pubsta
;
1282 struct sk_buff
*skb
;
1286 if (WARN_ON(skb_queue_empty(skbs
)))
1289 skb
= skb_peek(skbs
);
1290 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1291 info
= IEEE80211_SKB_CB(skb
);
1292 sdata
= vif_to_sdata(info
->control
.vif
);
1293 if (sta
&& !sta
->uploaded
)
1301 switch (sdata
->vif
.type
) {
1302 case NL80211_IFTYPE_MONITOR
:
1303 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
1307 sdata
= rcu_dereference(local
->monitor_sdata
);
1311 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1312 } else if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
1318 case NL80211_IFTYPE_AP_VLAN
:
1319 sdata
= container_of(sdata
->bss
,
1320 struct ieee80211_sub_if_data
, u
.ap
);
1327 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1330 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1332 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1338 * Invoke TX handlers, return 0 on success and non-zero if the
1339 * frame was dropped or queued.
1341 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1343 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1344 ieee80211_tx_result res
= TX_DROP
;
1346 #define CALL_TXH(txh) \
1349 if (res != TX_CONTINUE) \
1353 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1354 CALL_TXH(ieee80211_tx_h_check_assoc
);
1355 CALL_TXH(ieee80211_tx_h_ps_buf
);
1356 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1357 CALL_TXH(ieee80211_tx_h_select_key
);
1358 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1359 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1361 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1362 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1367 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1368 CALL_TXH(ieee80211_tx_h_sequence
);
1369 CALL_TXH(ieee80211_tx_h_fragment
);
1370 /* handlers after fragment must be aware of tx info fragmentation! */
1371 CALL_TXH(ieee80211_tx_h_stats
);
1372 CALL_TXH(ieee80211_tx_h_encrypt
);
1373 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1374 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1378 if (unlikely(res
== TX_DROP
)) {
1379 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1381 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1383 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1385 } else if (unlikely(res
== TX_QUEUED
)) {
1386 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1393 bool ieee80211_tx_prepare_skb(struct ieee80211_hw
*hw
,
1394 struct ieee80211_vif
*vif
, struct sk_buff
*skb
,
1395 int band
, struct ieee80211_sta
**sta
)
1397 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1398 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1399 struct ieee80211_tx_data tx
;
1401 if (ieee80211_tx_prepare(sdata
, &tx
, skb
) == TX_DROP
)
1405 info
->control
.vif
= vif
;
1406 info
->hw_queue
= vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1408 if (invoke_tx_handlers(&tx
))
1413 *sta
= &tx
.sta
->sta
;
1420 EXPORT_SYMBOL(ieee80211_tx_prepare_skb
);
1423 * Returns false if the frame couldn't be transmitted but was queued instead.
1425 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1426 struct sk_buff
*skb
, bool txpending
,
1427 enum ieee80211_band band
)
1429 struct ieee80211_local
*local
= sdata
->local
;
1430 struct ieee80211_tx_data tx
;
1431 ieee80211_tx_result res_prepare
;
1432 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1436 if (unlikely(skb
->len
< 10)) {
1441 /* initialises tx */
1443 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, skb
);
1445 if (unlikely(res_prepare
== TX_DROP
)) {
1446 ieee80211_free_txskb(&local
->hw
, skb
);
1448 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1454 /* set up hw_queue value early */
1455 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1456 !(local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
))
1458 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1460 if (!invoke_tx_handlers(&tx
))
1461 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1467 /* device xmit handlers */
1469 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1470 struct sk_buff
*skb
,
1471 int head_need
, bool may_encrypt
)
1473 struct ieee80211_local
*local
= sdata
->local
;
1476 if (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
) {
1477 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1478 tail_need
-= skb_tailroom(skb
);
1479 tail_need
= max_t(int, tail_need
, 0);
1482 if (skb_cloned(skb
))
1483 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1484 else if (head_need
|| tail_need
)
1485 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1489 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1490 wiphy_debug(local
->hw
.wiphy
,
1491 "failed to reallocate TX buffer\n");
1498 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
1499 enum ieee80211_band band
)
1501 struct ieee80211_local
*local
= sdata
->local
;
1502 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1503 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1507 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1509 headroom
= local
->tx_headroom
;
1511 headroom
+= sdata
->encrypt_headroom
;
1512 headroom
-= skb_headroom(skb
);
1513 headroom
= max_t(int, 0, headroom
);
1515 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1516 ieee80211_free_txskb(&local
->hw
, skb
);
1520 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1521 info
->control
.vif
= &sdata
->vif
;
1523 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1524 if (ieee80211_is_data(hdr
->frame_control
) &&
1525 is_unicast_ether_addr(hdr
->addr1
)) {
1526 if (mesh_nexthop_resolve(sdata
, skb
))
1527 return; /* skb queued: don't free */
1529 ieee80211_mps_set_frame_flags(sdata
, NULL
, hdr
);
1533 ieee80211_set_qos_hdr(sdata
, skb
);
1534 ieee80211_tx(sdata
, skb
, false, band
);
1537 static bool ieee80211_parse_tx_radiotap(struct sk_buff
*skb
)
1539 struct ieee80211_radiotap_iterator iterator
;
1540 struct ieee80211_radiotap_header
*rthdr
=
1541 (struct ieee80211_radiotap_header
*) skb
->data
;
1542 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1543 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
1547 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1548 IEEE80211_TX_CTL_DONTFRAG
;
1551 * for every radiotap entry that is present
1552 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1553 * entries present, or -EINVAL on error)
1557 ret
= ieee80211_radiotap_iterator_next(&iterator
);
1562 /* see if this argument is something we can use */
1563 switch (iterator
.this_arg_index
) {
1565 * You must take care when dereferencing iterator.this_arg
1566 * for multibyte types... the pointer is not aligned. Use
1567 * get_unaligned((type *)iterator.this_arg) to dereference
1568 * iterator.this_arg for type "type" safely on all arches.
1570 case IEEE80211_RADIOTAP_FLAGS
:
1571 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
1573 * this indicates that the skb we have been
1574 * handed has the 32-bit FCS CRC at the end...
1575 * we should react to that by snipping it off
1576 * because it will be recomputed and added
1579 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
1582 skb_trim(skb
, skb
->len
- FCS_LEN
);
1584 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
1585 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1586 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
1587 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
1590 case IEEE80211_RADIOTAP_TX_FLAGS
:
1591 txflags
= get_unaligned_le16(iterator
.this_arg
);
1592 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
1593 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1597 * Please update the file
1598 * Documentation/networking/mac80211-injection.txt
1599 * when parsing new fields here.
1607 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
1611 * remove the radiotap header
1612 * iterator->_max_length was sanity-checked against
1613 * skb->len by iterator init
1615 skb_pull(skb
, iterator
._max_length
);
1620 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
1621 struct net_device
*dev
)
1623 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1624 struct ieee80211_chanctx_conf
*chanctx_conf
;
1625 struct ieee80211_channel
*chan
;
1626 struct ieee80211_radiotap_header
*prthdr
=
1627 (struct ieee80211_radiotap_header
*)skb
->data
;
1628 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1629 struct ieee80211_hdr
*hdr
;
1630 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
1634 /* check for not even having the fixed radiotap header part */
1635 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
1636 goto fail
; /* too short to be possibly valid */
1638 /* is it a header version we can trust to find length from? */
1639 if (unlikely(prthdr
->it_version
))
1640 goto fail
; /* only version 0 is supported */
1642 /* then there must be a radiotap header with a length we can use */
1643 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
1645 /* does the skb contain enough to deliver on the alleged length? */
1646 if (unlikely(skb
->len
< len_rthdr
))
1647 goto fail
; /* skb too short for claimed rt header extent */
1650 * fix up the pointers accounting for the radiotap
1651 * header still being in there. We are being given
1652 * a precooked IEEE80211 header so no need for
1655 skb_set_mac_header(skb
, len_rthdr
);
1657 * these are just fixed to the end of the rt area since we
1658 * don't have any better information and at this point, nobody cares
1660 skb_set_network_header(skb
, len_rthdr
);
1661 skb_set_transport_header(skb
, len_rthdr
);
1663 if (skb
->len
< len_rthdr
+ 2)
1666 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
1667 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1669 if (skb
->len
< len_rthdr
+ hdrlen
)
1673 * Initialize skb->protocol if the injected frame is a data frame
1674 * carrying a rfc1042 header
1676 if (ieee80211_is_data(hdr
->frame_control
) &&
1677 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
1678 u8
*payload
= (u8
*)hdr
+ hdrlen
;
1680 if (ether_addr_equal(payload
, rfc1042_header
))
1681 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
1685 memset(info
, 0, sizeof(*info
));
1687 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1688 IEEE80211_TX_CTL_INJECTED
;
1690 /* process and remove the injection radiotap header */
1691 if (!ieee80211_parse_tx_radiotap(skb
))
1697 * We process outgoing injected frames that have a local address
1698 * we handle as though they are non-injected frames.
1699 * This code here isn't entirely correct, the local MAC address
1700 * isn't always enough to find the interface to use; for proper
1701 * VLAN/WDS support we will need a different mechanism (which
1702 * likely isn't going to be monitor interfaces).
1704 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1706 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
1707 if (!ieee80211_sdata_running(tmp_sdata
))
1709 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1710 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1711 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
1713 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
1719 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1720 if (!chanctx_conf
) {
1721 tmp_sdata
= rcu_dereference(local
->monitor_sdata
);
1724 rcu_dereference(tmp_sdata
->vif
.chanctx_conf
);
1728 chan
= chanctx_conf
->def
.chan
;
1729 else if (!local
->use_chanctx
)
1730 chan
= local
->_oper_chandef
.chan
;
1735 * Frame injection is not allowed if beaconing is not allowed
1736 * or if we need radar detection. Beaconing is usually not allowed when
1737 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1738 * Passive scan is also used in world regulatory domains where
1739 * your country is not known and as such it should be treated as
1740 * NO TX unless the channel is explicitly allowed in which case
1741 * your current regulatory domain would not have the passive scan
1744 * Since AP mode uses monitor interfaces to inject/TX management
1745 * frames we can make AP mode the exception to this rule once it
1746 * supports radar detection as its implementation can deal with
1747 * radar detection by itself. We can do that later by adding a
1748 * monitor flag interfaces used for AP support.
1750 if ((chan
->flags
& (IEEE80211_CHAN_NO_IR
| IEEE80211_CHAN_RADAR
)))
1753 ieee80211_xmit(sdata
, skb
, chan
->band
);
1756 return NETDEV_TX_OK
;
1762 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
1766 * Measure Tx frame arrival time for Tx latency statistics calculation
1767 * A single Tx frame latency should be measured from when it is entering the
1768 * Kernel until we receive Tx complete confirmation indication and the skb is
1771 static void ieee80211_tx_latency_start_msrmnt(struct ieee80211_local
*local
,
1772 struct sk_buff
*skb
)
1774 struct timespec skb_arv
;
1775 struct ieee80211_tx_latency_bin_ranges
*tx_latency
;
1777 tx_latency
= rcu_dereference(local
->tx_latency
);
1781 ktime_get_ts(&skb_arv
);
1782 skb
->tstamp
= ktime_set(skb_arv
.tv_sec
, skb_arv
.tv_nsec
);
1786 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1787 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1788 * @skb: packet to be sent
1789 * @dev: incoming interface
1791 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1792 * not be freed, and caller is responsible for either retrying later or freeing
1795 * This function takes in an Ethernet header and encapsulates it with suitable
1796 * IEEE 802.11 header based on which interface the packet is coming in. The
1797 * encapsulated packet will then be passed to master interface, wlan#.11, for
1798 * transmission (through low-level driver).
1800 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
1801 struct net_device
*dev
)
1803 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
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_direct
= false;
1821 struct ieee80211_chanctx_conf
*chanctx_conf
;
1822 struct ieee80211_sub_if_data
*ap_sdata
;
1823 enum ieee80211_band band
;
1825 if (unlikely(skb
->len
< ETH_HLEN
))
1828 /* convert Ethernet header to proper 802.11 header (based on
1829 * operation mode) */
1830 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
1831 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
1835 /* Measure frame arrival for Tx latency statistics calculation */
1836 ieee80211_tx_latency_start_msrmnt(local
, skb
);
1838 switch (sdata
->vif
.type
) {
1839 case NL80211_IFTYPE_AP_VLAN
:
1840 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1842 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1844 memcpy(hdr
.addr1
, sta
->sta
.addr
, ETH_ALEN
);
1845 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1846 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1847 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1849 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1850 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1852 ap_sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1854 chanctx_conf
= rcu_dereference(ap_sdata
->vif
.chanctx_conf
);
1857 band
= chanctx_conf
->def
.chan
->band
;
1861 case NL80211_IFTYPE_AP
:
1862 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1863 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1866 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
1868 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1869 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1870 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1872 band
= chanctx_conf
->def
.chan
->band
;
1874 case NL80211_IFTYPE_WDS
:
1875 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1877 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
1878 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1879 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1880 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1883 * This is the exception! WDS style interfaces are prohibited
1884 * when channel contexts are in used so this must be valid
1886 band
= local
->hw
.conf
.chandef
.chan
->band
;
1888 #ifdef CONFIG_MAC80211_MESH
1889 case NL80211_IFTYPE_MESH_POINT
:
1890 if (!is_multicast_ether_addr(skb
->data
)) {
1891 struct sta_info
*next_hop
;
1892 bool mpp_lookup
= true;
1894 mpath
= mesh_path_lookup(sdata
, skb
->data
);
1897 next_hop
= rcu_dereference(mpath
->next_hop
);
1899 !(mpath
->flags
& (MESH_PATH_ACTIVE
|
1900 MESH_PATH_RESOLVING
)))
1905 mppath
= mpp_path_lookup(sdata
, skb
->data
);
1907 if (mppath
&& mpath
)
1908 mesh_path_del(mpath
->sdata
, mpath
->dst
);
1912 * Use address extension if it is a packet from
1913 * another interface or if we know the destination
1914 * is being proxied by a portal (i.e. portal address
1915 * differs from proxied address)
1917 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
1918 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
1919 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1920 skb
->data
, skb
->data
+ ETH_ALEN
);
1921 meshhdrlen
= ieee80211_new_mesh_header(sdata
, &mesh_hdr
,
1924 /* DS -> MBSS (802.11-2012 13.11.3.3).
1925 * For unicast with unknown forwarding information,
1926 * destination might be in the MBSS or if that fails
1927 * forwarded to another mesh gate. In either case
1928 * resolution will be handled in ieee80211_xmit(), so
1929 * leave the original DA. This also works for mcast */
1930 const u8
*mesh_da
= skb
->data
;
1933 mesh_da
= mppath
->mpp
;
1935 mesh_da
= mpath
->dst
;
1937 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1938 mesh_da
, sdata
->vif
.addr
);
1939 if (is_multicast_ether_addr(mesh_da
))
1940 /* DA TA mSA AE:SA */
1941 meshhdrlen
= ieee80211_new_mesh_header(
1943 skb
->data
+ ETH_ALEN
, NULL
);
1945 /* RA TA mDA mSA AE:DA SA */
1946 meshhdrlen
= ieee80211_new_mesh_header(
1947 sdata
, &mesh_hdr
, skb
->data
,
1948 skb
->data
+ ETH_ALEN
);
1951 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1954 band
= chanctx_conf
->def
.chan
->band
;
1957 case NL80211_IFTYPE_STATION
:
1958 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
1959 bool tdls_peer
= false;
1961 sta
= sta_info_get(sdata
, skb
->data
);
1963 authorized
= test_sta_flag(sta
,
1964 WLAN_STA_AUTHORIZED
);
1965 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1966 tdls_peer
= test_sta_flag(sta
,
1967 WLAN_STA_TDLS_PEER
);
1968 tdls_auth
= test_sta_flag(sta
,
1969 WLAN_STA_TDLS_PEER_AUTH
);
1973 * If the TDLS link is enabled, send everything
1974 * directly. Otherwise, allow TDLS setup frames
1975 * to be transmitted indirectly.
1977 tdls_direct
= tdls_peer
&& (tdls_auth
||
1978 !(ethertype
== ETH_P_TDLS
&& skb
->len
> 14 &&
1979 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
));
1983 /* link during setup - throw out frames to peer */
1988 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1989 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1990 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1992 } else if (sdata
->u
.mgd
.use_4addr
&&
1993 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
1994 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
1995 IEEE80211_FCTL_TODS
);
1997 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1998 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1999 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2000 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2003 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
2005 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2006 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2007 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
2010 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2013 band
= chanctx_conf
->def
.chan
->band
;
2015 case NL80211_IFTYPE_ADHOC
:
2017 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2018 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2019 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
2021 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2024 band
= chanctx_conf
->def
.chan
->band
;
2031 * There's no need to try to look up the destination
2032 * if it is a multicast address (which can only happen
2035 multicast
= is_multicast_ether_addr(hdr
.addr1
);
2037 sta
= sta_info_get(sdata
, hdr
.addr1
);
2039 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2040 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
2044 /* For mesh, the use of the QoS header is mandatory */
2045 if (ieee80211_vif_is_mesh(&sdata
->vif
))
2048 /* receiver and we are QoS enabled, use a QoS type frame */
2049 if (wme_sta
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
) {
2050 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2055 * Drop unicast frames to unauthorised stations unless they are
2056 * EAPOL frames from the local station.
2058 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2059 !multicast
&& !authorized
&&
2060 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
2061 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
2062 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2063 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2064 dev
->name
, hdr
.addr1
);
2067 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
2072 if (unlikely(!multicast
&& skb
->sk
&&
2073 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
2074 struct sk_buff
*orig_skb
= skb
;
2076 skb
= skb_clone(skb
, GFP_ATOMIC
);
2078 unsigned long flags
;
2081 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
2082 id
= idr_alloc(&local
->ack_status_frames
, orig_skb
,
2083 1, 0x10000, GFP_ATOMIC
);
2084 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2088 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2089 } else if (skb_shared(skb
)) {
2090 kfree_skb(orig_skb
);
2096 /* couldn't clone -- lose tx status ... */
2102 * If the skb is shared we need to obtain our own copy.
2104 if (skb_shared(skb
)) {
2105 struct sk_buff
*tmp_skb
= skb
;
2107 /* can't happen -- skb is a clone if info_id != 0 */
2110 skb
= skb_clone(skb
, GFP_ATOMIC
);
2117 hdr
.frame_control
= fc
;
2118 hdr
.duration_id
= 0;
2121 skip_header_bytes
= ETH_HLEN
;
2122 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2123 encaps_data
= bridge_tunnel_header
;
2124 encaps_len
= sizeof(bridge_tunnel_header
);
2125 skip_header_bytes
-= 2;
2126 } else if (ethertype
>= ETH_P_802_3_MIN
) {
2127 encaps_data
= rfc1042_header
;
2128 encaps_len
= sizeof(rfc1042_header
);
2129 skip_header_bytes
-= 2;
2135 nh_pos
= skb_network_header(skb
) - skb
->data
;
2136 h_pos
= skb_transport_header(skb
) - skb
->data
;
2138 skb_pull(skb
, skip_header_bytes
);
2139 nh_pos
-= skip_header_bytes
;
2140 h_pos
-= skip_header_bytes
;
2142 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2145 * So we need to modify the skb header and hence need a copy of
2146 * that. The head_need variable above doesn't, so far, include
2147 * the needed header space that we don't need right away. If we
2148 * can, then we don't reallocate right now but only after the
2149 * frame arrives at the master device (if it does...)
2151 * If we cannot, however, then we will reallocate to include all
2152 * the ever needed space. Also, if we need to reallocate it anyway,
2153 * make it big enough for everything we may ever need.
2156 if (head_need
> 0 || skb_cloned(skb
)) {
2157 head_need
+= sdata
->encrypt_headroom
;
2158 head_need
+= local
->tx_headroom
;
2159 head_need
= max_t(int, 0, head_need
);
2160 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true)) {
2161 ieee80211_free_txskb(&local
->hw
, skb
);
2168 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2169 nh_pos
+= encaps_len
;
2170 h_pos
+= encaps_len
;
2173 #ifdef CONFIG_MAC80211_MESH
2174 if (meshhdrlen
> 0) {
2175 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2176 nh_pos
+= meshhdrlen
;
2177 h_pos
+= meshhdrlen
;
2181 if (ieee80211_is_data_qos(fc
)) {
2182 __le16
*qos_control
;
2184 qos_control
= (__le16
*) skb_push(skb
, 2);
2185 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2187 * Maybe we could actually set some fields here, for now just
2188 * initialise to zero to indicate no special operation.
2192 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2197 dev
->stats
.tx_packets
++;
2198 dev
->stats
.tx_bytes
+= skb
->len
;
2200 /* Update skb pointers to various headers since this modified frame
2201 * is going to go through Linux networking code that may potentially
2202 * need things like pointer to IP header. */
2203 skb_set_mac_header(skb
, 0);
2204 skb_set_network_header(skb
, nh_pos
);
2205 skb_set_transport_header(skb
, h_pos
);
2207 info
= IEEE80211_SKB_CB(skb
);
2208 memset(info
, 0, sizeof(*info
));
2210 dev
->trans_start
= jiffies
;
2212 info
->flags
= info_flags
;
2213 info
->ack_frame_id
= info_id
;
2215 ieee80211_xmit(sdata
, skb
, band
);
2218 return NETDEV_TX_OK
;
2224 return NETDEV_TX_OK
;
2229 * ieee80211_clear_tx_pending may not be called in a context where
2230 * it is possible that it packets could come in again.
2232 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
2234 struct sk_buff
*skb
;
2237 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2238 while ((skb
= skb_dequeue(&local
->pending
[i
])) != NULL
)
2239 ieee80211_free_txskb(&local
->hw
, skb
);
2244 * Returns false if the frame couldn't be transmitted but was queued instead,
2245 * which in this case means re-queued -- take as an indication to stop sending
2246 * more pending frames.
2248 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
2249 struct sk_buff
*skb
)
2251 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2252 struct ieee80211_sub_if_data
*sdata
;
2253 struct sta_info
*sta
;
2254 struct ieee80211_hdr
*hdr
;
2256 struct ieee80211_chanctx_conf
*chanctx_conf
;
2258 sdata
= vif_to_sdata(info
->control
.vif
);
2260 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
2261 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2262 if (unlikely(!chanctx_conf
)) {
2266 result
= ieee80211_tx(sdata
, skb
, true,
2267 chanctx_conf
->def
.chan
->band
);
2269 struct sk_buff_head skbs
;
2271 __skb_queue_head_init(&skbs
);
2272 __skb_queue_tail(&skbs
, skb
);
2274 hdr
= (struct ieee80211_hdr
*)skb
->data
;
2275 sta
= sta_info_get(sdata
, hdr
->addr1
);
2277 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
2284 * Transmit all pending packets. Called from tasklet.
2286 void ieee80211_tx_pending(unsigned long data
)
2288 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
2289 unsigned long flags
;
2295 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
2296 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2298 * If queue is stopped by something other than due to pending
2299 * frames, or we have no pending frames, proceed to next queue.
2301 if (local
->queue_stop_reasons
[i
] ||
2302 skb_queue_empty(&local
->pending
[i
]))
2305 while (!skb_queue_empty(&local
->pending
[i
])) {
2306 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
2307 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2309 if (WARN_ON(!info
->control
.vif
)) {
2310 ieee80211_free_txskb(&local
->hw
, skb
);
2314 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
2317 txok
= ieee80211_tx_pending_skb(local
, skb
);
2318 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
2324 if (skb_queue_empty(&local
->pending
[i
]))
2325 ieee80211_propagate_queue_wake(local
, i
);
2327 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
2332 /* functions for drivers to get certain frames */
2334 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2335 struct ps_data
*ps
, struct sk_buff
*skb
)
2339 int i
, have_bits
= 0, n1
, n2
;
2341 /* Generate bitmap for TIM only if there are any STAs in power save
2343 if (atomic_read(&ps
->num_sta_ps
) > 0)
2344 /* in the hope that this is faster than
2345 * checking byte-for-byte */
2346 have_bits
= !bitmap_empty((unsigned long *)ps
->tim
,
2347 IEEE80211_MAX_AID
+1);
2349 if (ps
->dtim_count
== 0)
2350 ps
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
2354 tim
= pos
= (u8
*) skb_put(skb
, 6);
2355 *pos
++ = WLAN_EID_TIM
;
2357 *pos
++ = ps
->dtim_count
;
2358 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
2360 if (ps
->dtim_count
== 0 && !skb_queue_empty(&ps
->bc_buf
))
2363 ps
->dtim_bc_mc
= aid0
== 1;
2366 /* Find largest even number N1 so that bits numbered 1 through
2367 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2368 * (N2 + 1) x 8 through 2007 are 0. */
2370 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
2377 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
2384 /* Bitmap control */
2386 /* Part Virt Bitmap */
2387 skb_put(skb
, n2
- n1
);
2388 memcpy(pos
, ps
->tim
+ n1
, n2
- n1
+ 1);
2390 tim
[1] = n2
- n1
+ 4;
2392 *pos
++ = aid0
; /* Bitmap control */
2393 *pos
++ = 0; /* Part Virt Bitmap */
2397 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2398 struct ps_data
*ps
, struct sk_buff
*skb
)
2400 struct ieee80211_local
*local
= sdata
->local
;
2403 * Not very nice, but we want to allow the driver to call
2404 * ieee80211_beacon_get() as a response to the set_tim()
2405 * callback. That, however, is already invoked under the
2406 * sta_lock to guarantee consistent and race-free update
2407 * of the tim bitmap in mac80211 and the driver.
2409 if (local
->tim_in_locked_section
) {
2410 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2412 spin_lock_bh(&local
->tim_lock
);
2413 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2414 spin_unlock_bh(&local
->tim_lock
);
2420 void ieee80211_csa_finish(struct ieee80211_vif
*vif
)
2422 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2424 ieee80211_queue_work(&sdata
->local
->hw
,
2425 &sdata
->csa_finalize_work
);
2427 EXPORT_SYMBOL(ieee80211_csa_finish
);
2429 static void ieee80211_update_csa(struct ieee80211_sub_if_data
*sdata
,
2430 struct beacon_data
*beacon
)
2432 struct probe_resp
*resp
;
2433 int counter_offset_beacon
= sdata
->csa_counter_offset_beacon
;
2434 int counter_offset_presp
= sdata
->csa_counter_offset_presp
;
2436 size_t beacon_data_len
;
2438 switch (sdata
->vif
.type
) {
2439 case NL80211_IFTYPE_AP
:
2440 beacon_data
= beacon
->tail
;
2441 beacon_data_len
= beacon
->tail_len
;
2443 case NL80211_IFTYPE_ADHOC
:
2444 beacon_data
= beacon
->head
;
2445 beacon_data_len
= beacon
->head_len
;
2447 case NL80211_IFTYPE_MESH_POINT
:
2448 beacon_data
= beacon
->head
;
2449 beacon_data_len
= beacon
->head_len
;
2454 if (WARN_ON(counter_offset_beacon
>= beacon_data_len
))
2457 /* warn if the driver did not check for/react to csa completeness */
2458 if (WARN_ON(beacon_data
[counter_offset_beacon
] == 0))
2461 beacon_data
[counter_offset_beacon
]--;
2463 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
&& counter_offset_presp
) {
2465 resp
= rcu_dereference(sdata
->u
.ap
.probe_resp
);
2467 /* if nl80211 accepted the offset, this should not happen. */
2468 if (WARN_ON(!resp
)) {
2472 resp
->data
[counter_offset_presp
]--;
2477 bool ieee80211_csa_is_complete(struct ieee80211_vif
*vif
)
2479 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2480 struct beacon_data
*beacon
= NULL
;
2482 size_t beacon_data_len
;
2483 int counter_beacon
= sdata
->csa_counter_offset_beacon
;
2486 if (!ieee80211_sdata_running(sdata
))
2490 if (vif
->type
== NL80211_IFTYPE_AP
) {
2491 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2493 beacon
= rcu_dereference(ap
->beacon
);
2494 if (WARN_ON(!beacon
|| !beacon
->tail
))
2496 beacon_data
= beacon
->tail
;
2497 beacon_data_len
= beacon
->tail_len
;
2498 } else if (vif
->type
== NL80211_IFTYPE_ADHOC
) {
2499 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2501 beacon
= rcu_dereference(ifibss
->presp
);
2505 beacon_data
= beacon
->head
;
2506 beacon_data_len
= beacon
->head_len
;
2507 } else if (vif
->type
== NL80211_IFTYPE_MESH_POINT
) {
2508 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2510 beacon
= rcu_dereference(ifmsh
->beacon
);
2514 beacon_data
= beacon
->head
;
2515 beacon_data_len
= beacon
->head_len
;
2521 if (WARN_ON(counter_beacon
> beacon_data_len
))
2524 if (beacon_data
[counter_beacon
] == 0)
2531 EXPORT_SYMBOL(ieee80211_csa_is_complete
);
2533 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
2534 struct ieee80211_vif
*vif
,
2535 u16
*tim_offset
, u16
*tim_length
)
2537 struct ieee80211_local
*local
= hw_to_local(hw
);
2538 struct sk_buff
*skb
= NULL
;
2539 struct ieee80211_tx_info
*info
;
2540 struct ieee80211_sub_if_data
*sdata
= NULL
;
2541 enum ieee80211_band band
;
2542 struct ieee80211_tx_rate_control txrc
;
2543 struct ieee80211_chanctx_conf
*chanctx_conf
;
2547 sdata
= vif_to_sdata(vif
);
2548 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2550 if (!ieee80211_sdata_running(sdata
) || !chanctx_conf
)
2558 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2559 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2560 struct beacon_data
*beacon
= rcu_dereference(ap
->beacon
);
2563 if (sdata
->vif
.csa_active
)
2564 ieee80211_update_csa(sdata
, beacon
);
2567 * headroom, head length,
2568 * tail length and maximum TIM length
2570 skb
= dev_alloc_skb(local
->tx_headroom
+
2572 beacon
->tail_len
+ 256 +
2573 local
->hw
.extra_beacon_tailroom
);
2577 skb_reserve(skb
, local
->tx_headroom
);
2578 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
2581 ieee80211_beacon_add_tim(sdata
, &ap
->ps
, skb
);
2584 *tim_offset
= beacon
->head_len
;
2586 *tim_length
= skb
->len
- beacon
->head_len
;
2589 memcpy(skb_put(skb
, beacon
->tail_len
),
2590 beacon
->tail
, beacon
->tail_len
);
2593 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2594 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2595 struct ieee80211_hdr
*hdr
;
2596 struct beacon_data
*presp
= rcu_dereference(ifibss
->presp
);
2601 if (sdata
->vif
.csa_active
)
2602 ieee80211_update_csa(sdata
, presp
);
2605 skb
= dev_alloc_skb(local
->tx_headroom
+ presp
->head_len
+
2606 local
->hw
.extra_beacon_tailroom
);
2609 skb_reserve(skb
, local
->tx_headroom
);
2610 memcpy(skb_put(skb
, presp
->head_len
), presp
->head
,
2613 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2614 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2615 IEEE80211_STYPE_BEACON
);
2616 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2617 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2618 struct beacon_data
*bcn
= rcu_dereference(ifmsh
->beacon
);
2623 if (sdata
->vif
.csa_active
)
2624 ieee80211_update_csa(sdata
, bcn
);
2626 if (ifmsh
->sync_ops
)
2627 ifmsh
->sync_ops
->adjust_tbtt(sdata
, bcn
);
2629 skb
= dev_alloc_skb(local
->tx_headroom
+
2633 local
->hw
.extra_beacon_tailroom
);
2636 skb_reserve(skb
, local
->tx_headroom
);
2637 memcpy(skb_put(skb
, bcn
->head_len
), bcn
->head
, bcn
->head_len
);
2638 ieee80211_beacon_add_tim(sdata
, &ifmsh
->ps
, skb
);
2639 memcpy(skb_put(skb
, bcn
->tail_len
), bcn
->tail
, bcn
->tail_len
);
2645 band
= chanctx_conf
->def
.chan
->band
;
2647 info
= IEEE80211_SKB_CB(skb
);
2649 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
2650 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
2653 memset(&txrc
, 0, sizeof(txrc
));
2655 txrc
.sband
= local
->hw
.wiphy
->bands
[band
];
2656 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
2658 txrc
.reported_rate
.idx
= -1;
2659 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
2660 if (txrc
.rate_idx_mask
== (1 << txrc
.sband
->n_bitrates
) - 1)
2661 txrc
.max_rate_idx
= -1;
2663 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
2665 rate_control_get_rate(sdata
, NULL
, &txrc
);
2667 info
->control
.vif
= vif
;
2669 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
2670 IEEE80211_TX_CTL_ASSIGN_SEQ
|
2671 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
2676 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
2678 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
2679 struct ieee80211_vif
*vif
)
2681 struct ieee80211_if_ap
*ap
= NULL
;
2682 struct sk_buff
*skb
= NULL
;
2683 struct probe_resp
*presp
= NULL
;
2684 struct ieee80211_hdr
*hdr
;
2685 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2687 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
2693 presp
= rcu_dereference(ap
->probe_resp
);
2697 skb
= dev_alloc_skb(presp
->len
);
2701 memcpy(skb_put(skb
, presp
->len
), presp
->data
, presp
->len
);
2703 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2704 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
2710 EXPORT_SYMBOL(ieee80211_proberesp_get
);
2712 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
2713 struct ieee80211_vif
*vif
)
2715 struct ieee80211_sub_if_data
*sdata
;
2716 struct ieee80211_if_managed
*ifmgd
;
2717 struct ieee80211_pspoll
*pspoll
;
2718 struct ieee80211_local
*local
;
2719 struct sk_buff
*skb
;
2721 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2724 sdata
= vif_to_sdata(vif
);
2725 ifmgd
= &sdata
->u
.mgd
;
2726 local
= sdata
->local
;
2728 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
2732 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2734 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
2735 memset(pspoll
, 0, sizeof(*pspoll
));
2736 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
2737 IEEE80211_STYPE_PSPOLL
);
2738 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
2740 /* aid in PS-Poll has its two MSBs each set to 1 */
2741 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
2743 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
2744 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
2748 EXPORT_SYMBOL(ieee80211_pspoll_get
);
2750 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
2751 struct ieee80211_vif
*vif
)
2753 struct ieee80211_hdr_3addr
*nullfunc
;
2754 struct ieee80211_sub_if_data
*sdata
;
2755 struct ieee80211_if_managed
*ifmgd
;
2756 struct ieee80211_local
*local
;
2757 struct sk_buff
*skb
;
2759 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2762 sdata
= vif_to_sdata(vif
);
2763 ifmgd
= &sdata
->u
.mgd
;
2764 local
= sdata
->local
;
2766 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*nullfunc
));
2770 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2772 nullfunc
= (struct ieee80211_hdr_3addr
*) skb_put(skb
,
2774 memset(nullfunc
, 0, sizeof(*nullfunc
));
2775 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
2776 IEEE80211_STYPE_NULLFUNC
|
2777 IEEE80211_FCTL_TODS
);
2778 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
2779 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
2780 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
2784 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
2786 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
2787 struct ieee80211_vif
*vif
,
2788 const u8
*ssid
, size_t ssid_len
,
2791 struct ieee80211_sub_if_data
*sdata
;
2792 struct ieee80211_local
*local
;
2793 struct ieee80211_hdr_3addr
*hdr
;
2794 struct sk_buff
*skb
;
2798 sdata
= vif_to_sdata(vif
);
2799 local
= sdata
->local
;
2800 ie_ssid_len
= 2 + ssid_len
;
2802 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
2803 ie_ssid_len
+ tailroom
);
2807 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2809 hdr
= (struct ieee80211_hdr_3addr
*) skb_put(skb
, sizeof(*hdr
));
2810 memset(hdr
, 0, sizeof(*hdr
));
2811 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2812 IEEE80211_STYPE_PROBE_REQ
);
2813 eth_broadcast_addr(hdr
->addr1
);
2814 memcpy(hdr
->addr2
, vif
->addr
, ETH_ALEN
);
2815 eth_broadcast_addr(hdr
->addr3
);
2817 pos
= skb_put(skb
, ie_ssid_len
);
2818 *pos
++ = WLAN_EID_SSID
;
2821 memcpy(pos
, ssid
, ssid_len
);
2826 EXPORT_SYMBOL(ieee80211_probereq_get
);
2828 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2829 const void *frame
, size_t frame_len
,
2830 const struct ieee80211_tx_info
*frame_txctl
,
2831 struct ieee80211_rts
*rts
)
2833 const struct ieee80211_hdr
*hdr
= frame
;
2835 rts
->frame_control
=
2836 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
2837 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
2839 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
2840 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
2842 EXPORT_SYMBOL(ieee80211_rts_get
);
2844 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2845 const void *frame
, size_t frame_len
,
2846 const struct ieee80211_tx_info
*frame_txctl
,
2847 struct ieee80211_cts
*cts
)
2849 const struct ieee80211_hdr
*hdr
= frame
;
2851 cts
->frame_control
=
2852 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
2853 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
2854 frame_len
, frame_txctl
);
2855 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
2857 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
2860 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
2861 struct ieee80211_vif
*vif
)
2863 struct ieee80211_local
*local
= hw_to_local(hw
);
2864 struct sk_buff
*skb
= NULL
;
2865 struct ieee80211_tx_data tx
;
2866 struct ieee80211_sub_if_data
*sdata
;
2868 struct ieee80211_tx_info
*info
;
2869 struct ieee80211_chanctx_conf
*chanctx_conf
;
2871 sdata
= vif_to_sdata(vif
);
2874 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2879 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2880 struct beacon_data
*beacon
=
2881 rcu_dereference(sdata
->u
.ap
.beacon
);
2883 if (!beacon
|| !beacon
->head
)
2886 ps
= &sdata
->u
.ap
.ps
;
2887 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2888 ps
= &sdata
->u
.mesh
.ps
;
2893 if (ps
->dtim_count
!= 0 || !ps
->dtim_bc_mc
)
2894 goto out
; /* send buffered bc/mc only after DTIM beacon */
2897 skb
= skb_dequeue(&ps
->bc_buf
);
2900 local
->total_ps_buffered
--;
2902 if (!skb_queue_empty(&ps
->bc_buf
) && skb
->len
>= 2) {
2903 struct ieee80211_hdr
*hdr
=
2904 (struct ieee80211_hdr
*) skb
->data
;
2905 /* more buffered multicast/broadcast frames ==> set
2906 * MoreData flag in IEEE 802.11 header to inform PS
2908 hdr
->frame_control
|=
2909 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
2912 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
2913 sdata
= IEEE80211_DEV_TO_SUB_IF(skb
->dev
);
2914 if (!ieee80211_tx_prepare(sdata
, &tx
, skb
))
2916 dev_kfree_skb_any(skb
);
2919 info
= IEEE80211_SKB_CB(skb
);
2921 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
2922 info
->band
= chanctx_conf
->def
.chan
->band
;
2924 if (invoke_tx_handlers(&tx
))
2931 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
2933 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data
*sdata
,
2934 struct sk_buff
*skb
, int tid
,
2935 enum ieee80211_band band
)
2937 int ac
= ieee802_1d_to_ac
[tid
& 7];
2939 skb_set_mac_header(skb
, 0);
2940 skb_set_network_header(skb
, 0);
2941 skb_set_transport_header(skb
, 0);
2943 skb_set_queue_mapping(skb
, ac
);
2944 skb
->priority
= tid
;
2946 skb
->dev
= sdata
->dev
;
2949 * The other path calling ieee80211_xmit is from the tasklet,
2950 * and while we can handle concurrent transmissions locking
2951 * requirements are that we do not come into tx with bhs on.
2954 ieee80211_xmit(sdata
, skb
, band
);