2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 * Transmit and frame generation functions.
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/bitmap.h>
20 #include <linux/rcupdate.h>
21 #include <linux/export.h>
22 #include <net/net_namespace.h>
23 #include <net/ieee80211_radiotap.h>
24 #include <net/cfg80211.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
39 static __le16
ieee80211_duration(struct ieee80211_tx_data
*tx
,
40 struct sk_buff
*skb
, int group_addr
,
43 int rate
, mrate
, erp
, dur
, i
, shift
= 0;
44 struct ieee80211_rate
*txrate
;
45 struct ieee80211_local
*local
= tx
->local
;
46 struct ieee80211_supported_band
*sband
;
47 struct ieee80211_hdr
*hdr
;
48 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
49 struct ieee80211_chanctx_conf
*chanctx_conf
;
53 chanctx_conf
= rcu_dereference(tx
->sdata
->vif
.chanctx_conf
);
55 shift
= ieee80211_chandef_get_shift(&chanctx_conf
->def
);
56 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
60 /* assume HW handles this */
61 if (tx
->rate
.flags
& IEEE80211_TX_RC_MCS
)
65 if (WARN_ON_ONCE(tx
->rate
.idx
< 0))
68 sband
= local
->hw
.wiphy
->bands
[info
->band
];
69 txrate
= &sband
->bitrates
[tx
->rate
.idx
];
71 erp
= txrate
->flags
& IEEE80211_RATE_ERP_G
;
74 * data and mgmt (except PS Poll):
76 * - during contention period:
77 * if addr1 is group address: 0
78 * if more fragments = 0 and addr1 is individual address: time to
79 * transmit one ACK plus SIFS
80 * if more fragments = 1 and addr1 is individual address: time to
81 * transmit next fragment plus 2 x ACK plus 3 x SIFS
84 * - control response frame (CTS or ACK) shall be transmitted using the
85 * same rate as the immediately previous frame in the frame exchange
86 * sequence, if this rate belongs to the PHY mandatory rates, or else
87 * at the highest possible rate belonging to the PHY rates in the
90 hdr
= (struct ieee80211_hdr
*)skb
->data
;
91 if (ieee80211_is_ctl(hdr
->frame_control
)) {
92 /* TODO: These control frames are not currently sent by
93 * mac80211, but should they be implemented, this function
94 * needs to be updated to support duration field calculation.
96 * RTS: time needed to transmit pending data/mgmt frame plus
97 * one CTS frame plus one ACK frame plus 3 x SIFS
98 * CTS: duration of immediately previous RTS minus time
99 * required to transmit CTS and its SIFS
100 * ACK: 0 if immediately previous directed data/mgmt had
101 * more=0, with more=1 duration in ACK frame is duration
102 * from previous frame minus time needed to transmit ACK
104 * PS Poll: BIT(15) | BIT(14) | aid
110 if (0 /* FIX: data/mgmt during CFP */)
111 return cpu_to_le16(32768);
113 if (group_addr
) /* Group address as the destination - no ACK */
116 /* Individual destination address:
117 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
118 * CTS and ACK frames shall be transmitted using the highest rate in
119 * basic rate set that is less than or equal to the rate of the
120 * immediately previous frame and that is using the same modulation
121 * (CCK or OFDM). If no basic rate set matches with these requirements,
122 * the highest mandatory rate of the PHY that is less than or equal to
123 * the rate of the previous frame is used.
124 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
127 /* use lowest available if everything fails */
128 mrate
= sband
->bitrates
[0].bitrate
;
129 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
130 struct ieee80211_rate
*r
= &sband
->bitrates
[i
];
132 if (r
->bitrate
> txrate
->bitrate
)
135 if ((rate_flags
& r
->flags
) != rate_flags
)
138 if (tx
->sdata
->vif
.bss_conf
.basic_rates
& BIT(i
))
139 rate
= DIV_ROUND_UP(r
->bitrate
, 1 << shift
);
141 switch (sband
->band
) {
142 case IEEE80211_BAND_2GHZ
: {
144 if (tx
->sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
145 flag
= IEEE80211_RATE_MANDATORY_G
;
147 flag
= IEEE80211_RATE_MANDATORY_B
;
152 case IEEE80211_BAND_5GHZ
:
153 if (r
->flags
& IEEE80211_RATE_MANDATORY_A
)
156 case IEEE80211_BAND_60GHZ
:
157 /* TODO, for now fall through */
158 case IEEE80211_NUM_BANDS
:
164 /* No matching basic rate found; use highest suitable mandatory
166 rate
= DIV_ROUND_UP(mrate
, 1 << shift
);
169 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
170 if (ieee80211_is_data_qos(hdr
->frame_control
) &&
171 *(ieee80211_get_qos_ctl(hdr
)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK
)
174 /* Time needed to transmit ACK
175 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
176 * to closest integer */
177 dur
= ieee80211_frame_duration(sband
->band
, 10, rate
, erp
,
178 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
182 /* Frame is fragmented: duration increases with time needed to
183 * transmit next fragment plus ACK and 2 x SIFS. */
184 dur
*= 2; /* ACK + SIFS */
186 dur
+= ieee80211_frame_duration(sband
->band
, next_frag_len
,
187 txrate
->bitrate
, erp
,
188 tx
->sdata
->vif
.bss_conf
.use_short_preamble
,
192 return cpu_to_le16(dur
);
196 static ieee80211_tx_result debug_noinline
197 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data
*tx
)
199 struct ieee80211_local
*local
= tx
->local
;
200 struct ieee80211_if_managed
*ifmgd
;
202 /* driver doesn't support power save */
203 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
))
206 /* hardware does dynamic power save */
207 if (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)
210 /* dynamic power save disabled */
211 if (local
->hw
.conf
.dynamic_ps_timeout
<= 0)
214 /* we are scanning, don't enable power save */
218 if (!local
->ps_sdata
)
221 /* No point if we're going to suspend */
222 if (local
->quiescing
)
225 /* dynamic ps is supported only in managed mode */
226 if (tx
->sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
229 ifmgd
= &tx
->sdata
->u
.mgd
;
232 * Don't wakeup from power save if u-apsd is enabled, voip ac has
233 * u-apsd enabled and the frame is in voip class. This effectively
234 * means that even if all access categories have u-apsd enabled, in
235 * practise u-apsd is only used with the voip ac. This is a
236 * workaround for the case when received voip class packets do not
237 * have correct qos tag for some reason, due the network or the
240 * Note: ifmgd->uapsd_queues access is racy here. If the value is
241 * changed via debugfs, user needs to reassociate manually to have
242 * everything in sync.
244 if ((ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
) &&
245 (ifmgd
->uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
) &&
246 skb_get_queue_mapping(tx
->skb
) == IEEE80211_AC_VO
)
249 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
250 ieee80211_stop_queues_by_reason(&local
->hw
,
251 IEEE80211_MAX_QUEUE_MAP
,
252 IEEE80211_QUEUE_STOP_REASON_PS
);
253 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
254 ieee80211_queue_work(&local
->hw
,
255 &local
->dynamic_ps_disable_work
);
258 /* Don't restart the timer if we're not disassociated */
259 if (!ifmgd
->associated
)
262 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
263 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
268 static ieee80211_tx_result debug_noinline
269 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data
*tx
)
272 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
273 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
276 if (unlikely(info
->flags
& IEEE80211_TX_CTL_INJECTED
))
279 if (unlikely(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
)) &&
280 test_bit(SDATA_STATE_OFFCHANNEL
, &tx
->sdata
->state
) &&
281 !ieee80211_is_probe_req(hdr
->frame_control
) &&
282 !ieee80211_is_nullfunc(hdr
->frame_control
))
284 * When software scanning only nullfunc frames (to notify
285 * the sleep state to the AP) and probe requests (for the
286 * active scan) are allowed, all other frames should not be
287 * sent and we should not get here, but if we do
288 * nonetheless, drop them to avoid sending them
289 * off-channel. See the link below and
290 * ieee80211_start_scan() for more.
292 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
296 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
299 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
302 if (tx
->flags
& IEEE80211_TX_PS_BUFFERED
)
306 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
308 if (likely(tx
->flags
& IEEE80211_TX_UNICAST
)) {
309 if (unlikely(!assoc
&&
310 ieee80211_is_data(hdr
->frame_control
))) {
311 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
312 sdata_info(tx
->sdata
,
313 "dropped data frame to not associated station %pM\n",
316 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
319 } else if (unlikely(tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
320 ieee80211_is_data(hdr
->frame_control
) &&
321 !atomic_read(&tx
->sdata
->u
.ap
.num_mcast_sta
))) {
323 * No associated STAs - no need to send multicast
332 /* This function is called whenever the AP is about to exceed the maximum limit
333 * of buffered frames for power saving STAs. This situation should not really
334 * happen often during normal operation, so dropping the oldest buffered packet
335 * from each queue should be OK to make some room for new frames. */
336 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
338 int total
= 0, purged
= 0;
340 struct ieee80211_sub_if_data
*sdata
;
341 struct sta_info
*sta
;
343 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
346 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
347 ps
= &sdata
->u
.ap
.ps
;
348 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
349 ps
= &sdata
->u
.mesh
.ps
;
353 skb
= skb_dequeue(&ps
->bc_buf
);
358 total
+= skb_queue_len(&ps
->bc_buf
);
362 * Drop one frame from each station from the lowest-priority
363 * AC that has frames at all.
365 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
368 for (ac
= IEEE80211_AC_BK
; ac
>= IEEE80211_AC_VO
; ac
--) {
369 skb
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
370 total
+= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
373 ieee80211_free_txskb(&local
->hw
, skb
);
379 local
->total_ps_buffered
= total
;
380 ps_dbg_hw(&local
->hw
, "PS buffers full - purged %d frames\n", purged
);
383 static ieee80211_tx_result
384 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data
*tx
)
386 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
387 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
391 * broadcast/multicast frame
393 * If any of the associated/peer stations is in power save mode,
394 * the frame is buffered to be sent after DTIM beacon frame.
395 * This is done either by the hardware or us.
398 /* powersaving STAs currently only in AP/VLAN/mesh mode */
399 if (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
400 tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
404 ps
= &tx
->sdata
->bss
->ps
;
405 } else if (ieee80211_vif_is_mesh(&tx
->sdata
->vif
)) {
406 ps
= &tx
->sdata
->u
.mesh
.ps
;
412 /* no buffering for ordered frames */
413 if (ieee80211_has_order(hdr
->frame_control
))
416 if (tx
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
417 info
->hw_queue
= tx
->sdata
->vif
.cab_queue
;
419 /* no stations in PS mode */
420 if (!atomic_read(&ps
->num_sta_ps
))
423 info
->flags
|= IEEE80211_TX_CTL_SEND_AFTER_DTIM
;
425 /* device releases frame after DTIM beacon */
426 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
))
429 /* buffered in mac80211 */
430 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
431 purge_old_ps_buffers(tx
->local
);
433 if (skb_queue_len(&ps
->bc_buf
) >= AP_MAX_BC_BUFFER
) {
435 "BC TX buffer full - dropping the oldest frame\n");
436 dev_kfree_skb(skb_dequeue(&ps
->bc_buf
));
438 tx
->local
->total_ps_buffered
++;
440 skb_queue_tail(&ps
->bc_buf
, tx
->skb
);
445 static int ieee80211_use_mfp(__le16 fc
, struct sta_info
*sta
,
448 if (!ieee80211_is_mgmt(fc
))
451 if (sta
== NULL
|| !test_sta_flag(sta
, WLAN_STA_MFP
))
454 if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr
*)
461 static ieee80211_tx_result
462 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data
*tx
)
464 struct sta_info
*sta
= tx
->sta
;
465 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
466 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
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 /* only deauth, disassoc and action are bufferable MMPDUs */
478 if (ieee80211_is_mgmt(hdr
->frame_control
) &&
479 !ieee80211_is_deauth(hdr
->frame_control
) &&
480 !ieee80211_is_disassoc(hdr
->frame_control
) &&
481 !ieee80211_is_action(hdr
->frame_control
)) {
482 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
486 ps_dbg(sta
->sdata
, "STA %pM aid %d: PS buffer for AC %d\n",
487 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
488 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
489 purge_old_ps_buffers(tx
->local
);
490 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
491 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
493 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
495 ieee80211_free_txskb(&local
->hw
, old
);
497 tx
->local
->total_ps_buffered
++;
499 info
->control
.jiffies
= jiffies
;
500 info
->control
.vif
= &tx
->sdata
->vif
;
501 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
502 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
504 if (!timer_pending(&local
->sta_cleanup
))
505 mod_timer(&local
->sta_cleanup
,
506 round_jiffies(jiffies
+
507 STA_INFO_CLEANUP_INTERVAL
));
510 * We queued up some frames, so the TIM bit might
511 * need to be set, recalculate it.
513 sta_info_recalc_tim(sta
);
516 } else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
518 "STA %pM in PS mode, but polling/in SP -> send frame\n",
525 static ieee80211_tx_result debug_noinline
526 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
528 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
531 if (tx
->flags
& IEEE80211_TX_UNICAST
)
532 return ieee80211_tx_h_unicast_ps_buf(tx
);
534 return ieee80211_tx_h_multicast_ps_buf(tx
);
537 static ieee80211_tx_result debug_noinline
538 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
540 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
542 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
)) {
543 if (tx
->sdata
->control_port_no_encrypt
)
544 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
545 info
->control
.flags
|= IEEE80211_TX_CTRL_PORT_CTRL_PROTO
;
551 static ieee80211_tx_result debug_noinline
552 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
554 struct ieee80211_key
*key
;
555 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
556 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
558 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
))
560 else if (tx
->sta
&& (key
= rcu_dereference(tx
->sta
->ptk
)))
562 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
563 is_multicast_ether_addr(hdr
->addr1
) &&
564 ieee80211_is_robust_mgmt_frame(hdr
) &&
565 (key
= rcu_dereference(tx
->sdata
->default_mgmt_key
)))
567 else if (is_multicast_ether_addr(hdr
->addr1
) &&
568 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
570 else if (!is_multicast_ether_addr(hdr
->addr1
) &&
571 (key
= rcu_dereference(tx
->sdata
->default_unicast_key
)))
573 else if (info
->flags
& IEEE80211_TX_CTL_INJECTED
)
575 else if (!tx
->sdata
->drop_unencrypted
)
577 else if (tx
->skb
->protocol
== tx
->sdata
->control_port_protocol
)
579 else if (ieee80211_is_robust_mgmt_frame(hdr
) &&
580 !(ieee80211_is_action(hdr
->frame_control
) &&
581 tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_MFP
)))
583 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
584 !ieee80211_is_robust_mgmt_frame(hdr
))
587 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_unencrypted
);
592 bool skip_hw
= false;
594 tx
->key
->tx_rx_count
++;
595 /* TODO: add threshold stuff again */
597 switch (tx
->key
->conf
.cipher
) {
598 case WLAN_CIPHER_SUITE_WEP40
:
599 case WLAN_CIPHER_SUITE_WEP104
:
600 case WLAN_CIPHER_SUITE_TKIP
:
601 if (!ieee80211_is_data_present(hdr
->frame_control
))
604 case WLAN_CIPHER_SUITE_CCMP
:
605 if (!ieee80211_is_data_present(hdr
->frame_control
) &&
606 !ieee80211_use_mfp(hdr
->frame_control
, tx
->sta
,
610 skip_hw
= (tx
->key
->conf
.flags
&
611 IEEE80211_KEY_FLAG_SW_MGMT_TX
) &&
612 ieee80211_is_mgmt(hdr
->frame_control
);
614 case WLAN_CIPHER_SUITE_AES_CMAC
:
615 if (!ieee80211_is_mgmt(hdr
->frame_control
))
620 if (unlikely(tx
->key
&& tx
->key
->flags
& KEY_FLAG_TAINTED
&&
621 !ieee80211_is_deauth(hdr
->frame_control
)))
624 if (!skip_hw
&& tx
->key
&&
625 tx
->key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
)
626 info
->control
.hw_key
= &tx
->key
->conf
;
632 static ieee80211_tx_result debug_noinline
633 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data
*tx
)
635 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
636 struct ieee80211_hdr
*hdr
= (void *)tx
->skb
->data
;
637 struct ieee80211_supported_band
*sband
;
639 struct ieee80211_tx_rate_control txrc
;
640 struct ieee80211_sta_rates
*ratetbl
= NULL
;
643 memset(&txrc
, 0, sizeof(txrc
));
645 sband
= tx
->local
->hw
.wiphy
->bands
[info
->band
];
647 len
= min_t(u32
, tx
->skb
->len
+ FCS_LEN
,
648 tx
->local
->hw
.wiphy
->frag_threshold
);
650 /* set up the tx rate control struct we give the RC algo */
651 txrc
.hw
= &tx
->local
->hw
;
653 txrc
.bss_conf
= &tx
->sdata
->vif
.bss_conf
;
655 txrc
.reported_rate
.idx
= -1;
656 txrc
.rate_idx_mask
= tx
->sdata
->rc_rateidx_mask
[info
->band
];
657 if (txrc
.rate_idx_mask
== (1 << sband
->n_bitrates
) - 1)
658 txrc
.max_rate_idx
= -1;
660 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
662 if (tx
->sdata
->rc_has_mcs_mask
[info
->band
])
663 txrc
.rate_idx_mcs_mask
=
664 tx
->sdata
->rc_rateidx_mcs_mask
[info
->band
];
666 txrc
.bss
= (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
667 tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
||
668 tx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
);
670 /* set up RTS protection if desired */
671 if (len
> tx
->local
->hw
.wiphy
->rts_threshold
) {
675 info
->control
.use_rts
= txrc
.rts
;
676 info
->control
.use_cts_prot
= tx
->sdata
->vif
.bss_conf
.use_cts_prot
;
679 * Use short preamble if the BSS can handle it, but not for
680 * management frames unless we know the receiver can handle
681 * that -- the management frame might be to a station that
682 * just wants a probe response.
684 if (tx
->sdata
->vif
.bss_conf
.use_short_preamble
&&
685 (ieee80211_is_data(hdr
->frame_control
) ||
686 (tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_SHORT_PREAMBLE
))))
687 txrc
.short_preamble
= true;
689 info
->control
.short_preamble
= txrc
.short_preamble
;
692 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
695 * Lets not bother rate control if we're associated and cannot
696 * talk to the sta. This should not happen.
698 if (WARN(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
) && assoc
&&
699 !rate_usable_index_exists(sband
, &tx
->sta
->sta
),
700 "%s: Dropped data frame as no usable bitrate found while "
701 "scanning and associated. Target station: "
702 "%pM on %d GHz band\n",
703 tx
->sdata
->name
, hdr
->addr1
,
708 * If we're associated with the sta at this point we know we can at
709 * least send the frame at the lowest bit rate.
711 rate_control_get_rate(tx
->sdata
, tx
->sta
, &txrc
);
713 if (tx
->sta
&& !info
->control
.skip_table
)
714 ratetbl
= rcu_dereference(tx
->sta
->sta
.rates
);
716 if (unlikely(info
->control
.rates
[0].idx
< 0)) {
718 struct ieee80211_tx_rate rate
= {
719 .idx
= ratetbl
->rate
[0].idx
,
720 .flags
= ratetbl
->rate
[0].flags
,
721 .count
= ratetbl
->rate
[0].count
724 if (ratetbl
->rate
[0].idx
< 0)
732 tx
->rate
= info
->control
.rates
[0];
735 if (txrc
.reported_rate
.idx
< 0) {
736 txrc
.reported_rate
= tx
->rate
;
737 if (tx
->sta
&& ieee80211_is_data(hdr
->frame_control
))
738 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
740 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
745 if (unlikely(!info
->control
.rates
[0].count
))
746 info
->control
.rates
[0].count
= 1;
748 if (WARN_ON_ONCE((info
->control
.rates
[0].count
> 1) &&
749 (info
->flags
& IEEE80211_TX_CTL_NO_ACK
)))
750 info
->control
.rates
[0].count
= 1;
755 static ieee80211_tx_result debug_noinline
756 ieee80211_tx_h_sequence(struct ieee80211_tx_data
*tx
)
758 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
759 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
765 * Packet injection may want to control the sequence
766 * number, if we have no matching interface then we
767 * neither assign one ourselves nor ask the driver to.
769 if (unlikely(info
->control
.vif
->type
== NL80211_IFTYPE_MONITOR
))
772 if (unlikely(ieee80211_is_ctl(hdr
->frame_control
)))
775 if (ieee80211_hdrlen(hdr
->frame_control
) < 24)
778 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
782 * Anything but QoS data that has a sequence number field
783 * (is long enough) gets a sequence number from the global
784 * counter. QoS data frames with a multicast destination
785 * also use the global counter (802.11-2012 9.3.2.10).
787 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
788 is_multicast_ether_addr(hdr
->addr1
)) {
789 /* driver should assign sequence number */
790 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
791 /* for pure STA mode without beacons, we can do it */
792 hdr
->seq_ctrl
= cpu_to_le16(tx
->sdata
->sequence_number
);
793 tx
->sdata
->sequence_number
+= 0x10;
798 * This should be true for injected/management frames only, for
799 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
800 * above since they are not QoS-data frames.
805 /* include per-STA, per-TID sequence counter */
807 qc
= ieee80211_get_qos_ctl(hdr
);
808 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
809 seq
= &tx
->sta
->tid_seq
[tid
];
811 hdr
->seq_ctrl
= cpu_to_le16(*seq
);
813 /* Increase the sequence number. */
814 *seq
= (*seq
+ 0x10) & IEEE80211_SCTL_SEQ
;
819 static int ieee80211_fragment(struct ieee80211_tx_data
*tx
,
820 struct sk_buff
*skb
, int hdrlen
,
823 struct ieee80211_local
*local
= tx
->local
;
824 struct ieee80211_tx_info
*info
;
826 int per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
827 int pos
= hdrlen
+ per_fragm
;
828 int rem
= skb
->len
- hdrlen
- per_fragm
;
830 if (WARN_ON(rem
< 0))
833 /* first fragment was already added to queue by caller */
836 int fraglen
= per_fragm
;
841 tmp
= dev_alloc_skb(local
->tx_headroom
+
843 IEEE80211_ENCRYPT_HEADROOM
+
844 IEEE80211_ENCRYPT_TAILROOM
);
848 __skb_queue_tail(&tx
->skbs
, tmp
);
850 skb_reserve(tmp
, local
->tx_headroom
+
851 IEEE80211_ENCRYPT_HEADROOM
);
852 /* copy control information */
853 memcpy(tmp
->cb
, skb
->cb
, sizeof(tmp
->cb
));
855 info
= IEEE80211_SKB_CB(tmp
);
856 info
->flags
&= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT
|
857 IEEE80211_TX_CTL_FIRST_FRAGMENT
);
860 info
->flags
|= IEEE80211_TX_CTL_MORE_FRAMES
;
862 skb_copy_queue_mapping(tmp
, skb
);
863 tmp
->priority
= skb
->priority
;
866 /* copy header and data */
867 memcpy(skb_put(tmp
, hdrlen
), skb
->data
, hdrlen
);
868 memcpy(skb_put(tmp
, fraglen
), skb
->data
+ pos
, fraglen
);
873 /* adjust first fragment's length */
874 skb
->len
= hdrlen
+ per_fragm
;
878 static ieee80211_tx_result debug_noinline
879 ieee80211_tx_h_fragment(struct ieee80211_tx_data
*tx
)
881 struct sk_buff
*skb
= tx
->skb
;
882 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
883 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
884 int frag_threshold
= tx
->local
->hw
.wiphy
->frag_threshold
;
888 /* no matter what happens, tx->skb moves to tx->skbs */
889 __skb_queue_tail(&tx
->skbs
, skb
);
892 if (info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)
895 if (tx
->local
->ops
->set_frag_threshold
)
899 * Warn when submitting a fragmented A-MPDU frame and drop it.
900 * This scenario is handled in ieee80211_tx_prepare but extra
901 * caution taken here as fragmented ampdu may cause Tx stop.
903 if (WARN_ON(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
906 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
908 /* internal error, why isn't DONTFRAG set? */
909 if (WARN_ON(skb
->len
+ FCS_LEN
<= frag_threshold
))
913 * Now fragment the frame. This will allocate all the fragments and
914 * chain them (using skb as the first fragment) to skb->next.
915 * During transmission, we will remove the successfully transmitted
916 * fragments from this list. When the low-level driver rejects one
917 * of the fragments then we will simply pretend to accept the skb
918 * but store it away as pending.
920 if (ieee80211_fragment(tx
, skb
, hdrlen
, frag_threshold
))
923 /* update duration/seq/flags of fragments */
926 skb_queue_walk(&tx
->skbs
, skb
) {
927 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
929 hdr
= (void *)skb
->data
;
930 info
= IEEE80211_SKB_CB(skb
);
932 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
933 hdr
->frame_control
|= morefrags
;
935 * No multi-rate retries for fragmented frames, that
936 * would completely throw off the NAV at other STAs.
938 info
->control
.rates
[1].idx
= -1;
939 info
->control
.rates
[2].idx
= -1;
940 info
->control
.rates
[3].idx
= -1;
941 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 4);
942 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
944 hdr
->frame_control
&= ~morefrags
;
946 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
953 static ieee80211_tx_result debug_noinline
954 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
962 skb_queue_walk(&tx
->skbs
, skb
) {
963 ac
= skb_get_queue_mapping(skb
);
964 tx
->sta
->tx_fragments
++;
965 tx
->sta
->tx_bytes
[ac
] += skb
->len
;
968 tx
->sta
->tx_packets
[ac
]++;
973 static ieee80211_tx_result debug_noinline
974 ieee80211_tx_h_encrypt(struct ieee80211_tx_data
*tx
)
979 switch (tx
->key
->conf
.cipher
) {
980 case WLAN_CIPHER_SUITE_WEP40
:
981 case WLAN_CIPHER_SUITE_WEP104
:
982 return ieee80211_crypto_wep_encrypt(tx
);
983 case WLAN_CIPHER_SUITE_TKIP
:
984 return ieee80211_crypto_tkip_encrypt(tx
);
985 case WLAN_CIPHER_SUITE_CCMP
:
986 return ieee80211_crypto_ccmp_encrypt(tx
);
987 case WLAN_CIPHER_SUITE_AES_CMAC
:
988 return ieee80211_crypto_aes_cmac_encrypt(tx
);
990 return ieee80211_crypto_hw_encrypt(tx
);
996 static ieee80211_tx_result debug_noinline
997 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data
*tx
)
1000 struct ieee80211_hdr
*hdr
;
1004 skb_queue_walk(&tx
->skbs
, skb
) {
1005 hdr
= (void *) skb
->data
;
1006 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
)))
1007 break; /* must not overwrite AID */
1008 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1009 struct sk_buff
*next
= skb_queue_next(&tx
->skbs
, skb
);
1010 next_len
= next
->len
;
1013 group_addr
= is_multicast_ether_addr(hdr
->addr1
);
1016 ieee80211_duration(tx
, skb
, group_addr
, next_len
);
1022 /* actual transmit path */
1024 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data
*tx
,
1025 struct sk_buff
*skb
,
1026 struct ieee80211_tx_info
*info
,
1027 struct tid_ampdu_tx
*tid_tx
,
1030 bool queued
= false;
1031 bool reset_agg_timer
= false;
1032 struct sk_buff
*purge_skb
= NULL
;
1034 if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1035 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1036 reset_agg_timer
= true;
1037 } else if (test_bit(HT_AGG_STATE_WANT_START
, &tid_tx
->state
)) {
1039 * nothing -- this aggregation session is being started
1040 * but that might still fail with the driver
1043 spin_lock(&tx
->sta
->lock
);
1045 * Need to re-check now, because we may get here
1047 * 1) in the window during which the setup is actually
1048 * already done, but not marked yet because not all
1049 * packets are spliced over to the driver pending
1050 * queue yet -- if this happened we acquire the lock
1051 * either before or after the splice happens, but
1052 * need to recheck which of these cases happened.
1054 * 2) during session teardown, if the OPERATIONAL bit
1055 * was cleared due to the teardown but the pointer
1056 * hasn't been assigned NULL yet (or we loaded it
1057 * before it was assigned) -- in this case it may
1058 * now be NULL which means we should just let the
1059 * packet pass through because splicing the frames
1060 * back is already done.
1062 tid_tx
= rcu_dereference_protected_tid_tx(tx
->sta
, tid
);
1065 /* do nothing, let packet pass through */
1066 } else if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1067 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1068 reset_agg_timer
= true;
1071 info
->control
.vif
= &tx
->sdata
->vif
;
1072 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1073 __skb_queue_tail(&tid_tx
->pending
, skb
);
1074 if (skb_queue_len(&tid_tx
->pending
) > STA_MAX_TX_BUFFER
)
1075 purge_skb
= __skb_dequeue(&tid_tx
->pending
);
1077 spin_unlock(&tx
->sta
->lock
);
1080 ieee80211_free_txskb(&tx
->local
->hw
, purge_skb
);
1083 /* reset session timer */
1084 if (reset_agg_timer
&& tid_tx
->timeout
)
1085 tid_tx
->last_tx
= jiffies
;
1093 static ieee80211_tx_result
1094 ieee80211_tx_prepare(struct ieee80211_sub_if_data
*sdata
,
1095 struct ieee80211_tx_data
*tx
,
1096 struct sk_buff
*skb
)
1098 struct ieee80211_local
*local
= sdata
->local
;
1099 struct ieee80211_hdr
*hdr
;
1100 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1104 memset(tx
, 0, sizeof(*tx
));
1108 __skb_queue_head_init(&tx
->skbs
);
1111 * If this flag is set to true anywhere, and we get here,
1112 * we are doing the needed processing, so remove the flag
1115 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1117 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1119 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1120 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1121 if (!tx
->sta
&& sdata
->dev
->ieee80211_ptr
->use_4addr
)
1123 } else if (info
->flags
& (IEEE80211_TX_CTL_INJECTED
|
1124 IEEE80211_TX_INTFL_NL80211_FRAME_TX
) ||
1125 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1126 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1129 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1131 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1132 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1133 (local
->hw
.flags
& IEEE80211_HW_AMPDU_AGGREGATION
) &&
1134 !(local
->hw
.flags
& IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
)) {
1135 struct tid_ampdu_tx
*tid_tx
;
1137 qc
= ieee80211_get_qos_ctl(hdr
);
1138 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
1140 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1144 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1147 if (unlikely(queued
))
1152 if (is_multicast_ether_addr(hdr
->addr1
)) {
1153 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1154 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1156 tx
->flags
|= IEEE80211_TX_UNICAST
;
1158 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1159 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1160 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1161 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1162 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1166 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1167 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
))
1168 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1170 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1175 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1176 struct ieee80211_vif
*vif
,
1177 struct ieee80211_sta
*sta
,
1178 struct sk_buff_head
*skbs
,
1181 struct ieee80211_tx_control control
;
1182 struct sk_buff
*skb
, *tmp
;
1183 unsigned long flags
;
1185 skb_queue_walk_safe(skbs
, skb
, tmp
) {
1186 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1187 int q
= info
->hw_queue
;
1189 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1190 if (WARN_ON_ONCE(q
>= local
->hw
.queues
)) {
1191 __skb_unlink(skb
, skbs
);
1192 ieee80211_free_txskb(&local
->hw
, skb
);
1197 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1198 if (local
->queue_stop_reasons
[q
] ||
1199 (!txpending
&& !skb_queue_empty(&local
->pending
[q
]))) {
1200 if (unlikely(info
->flags
&
1201 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
)) {
1202 if (local
->queue_stop_reasons
[q
] &
1203 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL
)) {
1205 * Drop off-channel frames if queues
1206 * are stopped for any reason other
1207 * than off-channel operation. Never
1210 spin_unlock_irqrestore(
1211 &local
->queue_stop_reason_lock
,
1213 ieee80211_purge_tx_queue(&local
->hw
,
1220 * Since queue is stopped, queue up frames for
1221 * later transmission from the tx-pending
1222 * tasklet when the queue is woken again.
1225 skb_queue_splice_init(skbs
,
1226 &local
->pending
[q
]);
1228 skb_queue_splice_tail_init(skbs
,
1229 &local
->pending
[q
]);
1231 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1236 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1238 info
->control
.vif
= vif
;
1241 __skb_unlink(skb
, skbs
);
1242 drv_tx(local
, &control
, skb
);
1249 * Returns false if the frame couldn't be transmitted but was queued instead.
1251 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1252 struct sk_buff_head
*skbs
, int led_len
,
1253 struct sta_info
*sta
, bool txpending
)
1255 struct ieee80211_tx_info
*info
;
1256 struct ieee80211_sub_if_data
*sdata
;
1257 struct ieee80211_vif
*vif
;
1258 struct ieee80211_sta
*pubsta
;
1259 struct sk_buff
*skb
;
1263 if (WARN_ON(skb_queue_empty(skbs
)))
1266 skb
= skb_peek(skbs
);
1267 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1268 info
= IEEE80211_SKB_CB(skb
);
1269 sdata
= vif_to_sdata(info
->control
.vif
);
1270 if (sta
&& !sta
->uploaded
)
1278 switch (sdata
->vif
.type
) {
1279 case NL80211_IFTYPE_MONITOR
:
1280 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
1284 sdata
= rcu_dereference(local
->monitor_sdata
);
1288 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1289 } else if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
1295 case NL80211_IFTYPE_AP_VLAN
:
1296 sdata
= container_of(sdata
->bss
,
1297 struct ieee80211_sub_if_data
, u
.ap
);
1304 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1307 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1309 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1315 * Invoke TX handlers, return 0 on success and non-zero if the
1316 * frame was dropped or queued.
1318 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1320 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1321 ieee80211_tx_result res
= TX_DROP
;
1323 #define CALL_TXH(txh) \
1326 if (res != TX_CONTINUE) \
1330 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1331 CALL_TXH(ieee80211_tx_h_check_assoc
);
1332 CALL_TXH(ieee80211_tx_h_ps_buf
);
1333 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1334 CALL_TXH(ieee80211_tx_h_select_key
);
1335 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1336 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1338 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1339 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1344 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1345 CALL_TXH(ieee80211_tx_h_sequence
);
1346 CALL_TXH(ieee80211_tx_h_fragment
);
1347 /* handlers after fragment must be aware of tx info fragmentation! */
1348 CALL_TXH(ieee80211_tx_h_stats
);
1349 CALL_TXH(ieee80211_tx_h_encrypt
);
1350 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1351 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1355 if (unlikely(res
== TX_DROP
)) {
1356 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1358 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1360 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1362 } else if (unlikely(res
== TX_QUEUED
)) {
1363 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1370 bool ieee80211_tx_prepare_skb(struct ieee80211_hw
*hw
,
1371 struct ieee80211_vif
*vif
, struct sk_buff
*skb
,
1372 int band
, struct ieee80211_sta
**sta
)
1374 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1375 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1376 struct ieee80211_tx_data tx
;
1378 if (ieee80211_tx_prepare(sdata
, &tx
, skb
) == TX_DROP
)
1382 info
->control
.vif
= vif
;
1383 info
->hw_queue
= vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1385 if (invoke_tx_handlers(&tx
))
1390 *sta
= &tx
.sta
->sta
;
1397 EXPORT_SYMBOL(ieee80211_tx_prepare_skb
);
1400 * Returns false if the frame couldn't be transmitted but was queued instead.
1402 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1403 struct sk_buff
*skb
, bool txpending
,
1404 enum ieee80211_band band
)
1406 struct ieee80211_local
*local
= sdata
->local
;
1407 struct ieee80211_tx_data tx
;
1408 ieee80211_tx_result res_prepare
;
1409 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1413 if (unlikely(skb
->len
< 10)) {
1418 /* initialises tx */
1420 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, skb
);
1422 if (unlikely(res_prepare
== TX_DROP
)) {
1423 ieee80211_free_txskb(&local
->hw
, skb
);
1425 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1431 /* set up hw_queue value early */
1432 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1433 !(local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
))
1435 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1437 if (!invoke_tx_handlers(&tx
))
1438 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1444 /* device xmit handlers */
1446 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1447 struct sk_buff
*skb
,
1448 int head_need
, bool may_encrypt
)
1450 struct ieee80211_local
*local
= sdata
->local
;
1453 if (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
) {
1454 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1455 tail_need
-= skb_tailroom(skb
);
1456 tail_need
= max_t(int, tail_need
, 0);
1459 if (skb_cloned(skb
))
1460 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1461 else if (head_need
|| tail_need
)
1462 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1466 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1467 wiphy_debug(local
->hw
.wiphy
,
1468 "failed to reallocate TX buffer\n");
1475 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
1476 enum ieee80211_band band
)
1478 struct ieee80211_local
*local
= sdata
->local
;
1479 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1480 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1484 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1486 headroom
= local
->tx_headroom
;
1488 headroom
+= IEEE80211_ENCRYPT_HEADROOM
;
1489 headroom
-= skb_headroom(skb
);
1490 headroom
= max_t(int, 0, headroom
);
1492 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1493 ieee80211_free_txskb(&local
->hw
, skb
);
1497 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1498 info
->control
.vif
= &sdata
->vif
;
1500 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1501 if (ieee80211_is_data(hdr
->frame_control
) &&
1502 is_unicast_ether_addr(hdr
->addr1
)) {
1503 if (mesh_nexthop_resolve(sdata
, skb
))
1504 return; /* skb queued: don't free */
1506 ieee80211_mps_set_frame_flags(sdata
, NULL
, hdr
);
1510 ieee80211_set_qos_hdr(sdata
, skb
);
1511 ieee80211_tx(sdata
, skb
, false, band
);
1514 static bool ieee80211_parse_tx_radiotap(struct sk_buff
*skb
)
1516 struct ieee80211_radiotap_iterator iterator
;
1517 struct ieee80211_radiotap_header
*rthdr
=
1518 (struct ieee80211_radiotap_header
*) skb
->data
;
1519 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1520 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
1524 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1525 IEEE80211_TX_CTL_DONTFRAG
;
1528 * for every radiotap entry that is present
1529 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1530 * entries present, or -EINVAL on error)
1534 ret
= ieee80211_radiotap_iterator_next(&iterator
);
1539 /* see if this argument is something we can use */
1540 switch (iterator
.this_arg_index
) {
1542 * You must take care when dereferencing iterator.this_arg
1543 * for multibyte types... the pointer is not aligned. Use
1544 * get_unaligned((type *)iterator.this_arg) to dereference
1545 * iterator.this_arg for type "type" safely on all arches.
1547 case IEEE80211_RADIOTAP_FLAGS
:
1548 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
1550 * this indicates that the skb we have been
1551 * handed has the 32-bit FCS CRC at the end...
1552 * we should react to that by snipping it off
1553 * because it will be recomputed and added
1556 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
1559 skb_trim(skb
, skb
->len
- FCS_LEN
);
1561 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
1562 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1563 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
1564 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
1567 case IEEE80211_RADIOTAP_TX_FLAGS
:
1568 txflags
= get_unaligned_le16(iterator
.this_arg
);
1569 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
1570 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1574 * Please update the file
1575 * Documentation/networking/mac80211-injection.txt
1576 * when parsing new fields here.
1584 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
1588 * remove the radiotap header
1589 * iterator->_max_length was sanity-checked against
1590 * skb->len by iterator init
1592 skb_pull(skb
, iterator
._max_length
);
1597 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
1598 struct net_device
*dev
)
1600 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1601 struct ieee80211_chanctx_conf
*chanctx_conf
;
1602 struct ieee80211_channel
*chan
;
1603 struct ieee80211_radiotap_header
*prthdr
=
1604 (struct ieee80211_radiotap_header
*)skb
->data
;
1605 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1606 struct ieee80211_hdr
*hdr
;
1607 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
1611 /* check for not even having the fixed radiotap header part */
1612 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
1613 goto fail
; /* too short to be possibly valid */
1615 /* is it a header version we can trust to find length from? */
1616 if (unlikely(prthdr
->it_version
))
1617 goto fail
; /* only version 0 is supported */
1619 /* then there must be a radiotap header with a length we can use */
1620 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
1622 /* does the skb contain enough to deliver on the alleged length? */
1623 if (unlikely(skb
->len
< len_rthdr
))
1624 goto fail
; /* skb too short for claimed rt header extent */
1627 * fix up the pointers accounting for the radiotap
1628 * header still being in there. We are being given
1629 * a precooked IEEE80211 header so no need for
1632 skb_set_mac_header(skb
, len_rthdr
);
1634 * these are just fixed to the end of the rt area since we
1635 * don't have any better information and at this point, nobody cares
1637 skb_set_network_header(skb
, len_rthdr
);
1638 skb_set_transport_header(skb
, len_rthdr
);
1640 if (skb
->len
< len_rthdr
+ 2)
1643 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
1644 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1646 if (skb
->len
< len_rthdr
+ hdrlen
)
1650 * Initialize skb->protocol if the injected frame is a data frame
1651 * carrying a rfc1042 header
1653 if (ieee80211_is_data(hdr
->frame_control
) &&
1654 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
1655 u8
*payload
= (u8
*)hdr
+ hdrlen
;
1657 if (ether_addr_equal(payload
, rfc1042_header
))
1658 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
1662 memset(info
, 0, sizeof(*info
));
1664 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1665 IEEE80211_TX_CTL_INJECTED
;
1667 /* process and remove the injection radiotap header */
1668 if (!ieee80211_parse_tx_radiotap(skb
))
1674 * We process outgoing injected frames that have a local address
1675 * we handle as though they are non-injected frames.
1676 * This code here isn't entirely correct, the local MAC address
1677 * isn't always enough to find the interface to use; for proper
1678 * VLAN/WDS support we will need a different mechanism (which
1679 * likely isn't going to be monitor interfaces).
1681 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1683 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
1684 if (!ieee80211_sdata_running(tmp_sdata
))
1686 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1687 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1688 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
1690 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
1696 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1697 if (!chanctx_conf
) {
1698 tmp_sdata
= rcu_dereference(local
->monitor_sdata
);
1701 rcu_dereference(tmp_sdata
->vif
.chanctx_conf
);
1705 chan
= chanctx_conf
->def
.chan
;
1706 else if (!local
->use_chanctx
)
1707 chan
= local
->_oper_chandef
.chan
;
1712 * Frame injection is not allowed if beaconing is not allowed
1713 * or if we need radar detection. Beaconing is usually not allowed when
1714 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1715 * Passive scan is also used in world regulatory domains where
1716 * your country is not known and as such it should be treated as
1717 * NO TX unless the channel is explicitly allowed in which case
1718 * your current regulatory domain would not have the passive scan
1721 * Since AP mode uses monitor interfaces to inject/TX management
1722 * frames we can make AP mode the exception to this rule once it
1723 * supports radar detection as its implementation can deal with
1724 * radar detection by itself. We can do that later by adding a
1725 * monitor flag interfaces used for AP support.
1727 if ((chan
->flags
& (IEEE80211_CHAN_NO_IBSS
| IEEE80211_CHAN_RADAR
|
1728 IEEE80211_CHAN_PASSIVE_SCAN
)))
1731 ieee80211_xmit(sdata
, skb
, chan
->band
);
1734 return NETDEV_TX_OK
;
1740 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
1744 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1745 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1746 * @skb: packet to be sent
1747 * @dev: incoming interface
1749 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1750 * not be freed, and caller is responsible for either retrying later or freeing
1753 * This function takes in an Ethernet header and encapsulates it with suitable
1754 * IEEE 802.11 header based on which interface the packet is coming in. The
1755 * encapsulated packet will then be passed to master interface, wlan#.11, for
1756 * transmission (through low-level driver).
1758 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
1759 struct net_device
*dev
)
1761 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1762 struct ieee80211_local
*local
= sdata
->local
;
1763 struct ieee80211_tx_info
*info
;
1765 u16 ethertype
, hdrlen
, meshhdrlen
= 0;
1767 struct ieee80211_hdr hdr
;
1768 struct ieee80211s_hdr mesh_hdr __maybe_unused
;
1769 struct mesh_path __maybe_unused
*mppath
= NULL
, *mpath
= NULL
;
1770 const u8
*encaps_data
;
1771 int encaps_len
, skip_header_bytes
;
1773 struct sta_info
*sta
= NULL
;
1774 bool wme_sta
= false, authorized
= false, tdls_auth
= false;
1775 bool tdls_direct
= false;
1779 struct ieee80211_chanctx_conf
*chanctx_conf
;
1780 struct ieee80211_sub_if_data
*ap_sdata
;
1781 enum ieee80211_band band
;
1783 if (unlikely(skb
->len
< ETH_HLEN
))
1786 /* convert Ethernet header to proper 802.11 header (based on
1787 * operation mode) */
1788 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
1789 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
1793 switch (sdata
->vif
.type
) {
1794 case NL80211_IFTYPE_AP_VLAN
:
1795 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1797 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1799 memcpy(hdr
.addr1
, sta
->sta
.addr
, ETH_ALEN
);
1800 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1801 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1802 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1804 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1805 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1807 ap_sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1809 chanctx_conf
= rcu_dereference(ap_sdata
->vif
.chanctx_conf
);
1812 band
= chanctx_conf
->def
.chan
->band
;
1816 case NL80211_IFTYPE_AP
:
1817 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1818 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1821 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
1823 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1824 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1825 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1827 band
= chanctx_conf
->def
.chan
->band
;
1829 case NL80211_IFTYPE_WDS
:
1830 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1832 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
1833 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1834 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1835 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1838 * This is the exception! WDS style interfaces are prohibited
1839 * when channel contexts are in used so this must be valid
1841 band
= local
->hw
.conf
.chandef
.chan
->band
;
1843 #ifdef CONFIG_MAC80211_MESH
1844 case NL80211_IFTYPE_MESH_POINT
:
1845 if (!is_multicast_ether_addr(skb
->data
)) {
1846 struct sta_info
*next_hop
;
1847 bool mpp_lookup
= true;
1849 mpath
= mesh_path_lookup(sdata
, skb
->data
);
1852 next_hop
= rcu_dereference(mpath
->next_hop
);
1854 !(mpath
->flags
& (MESH_PATH_ACTIVE
|
1855 MESH_PATH_RESOLVING
)))
1860 mppath
= mpp_path_lookup(sdata
, skb
->data
);
1862 if (mppath
&& mpath
)
1863 mesh_path_del(mpath
->sdata
, mpath
->dst
);
1867 * Use address extension if it is a packet from
1868 * another interface or if we know the destination
1869 * is being proxied by a portal (i.e. portal address
1870 * differs from proxied address)
1872 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
1873 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
1874 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1875 skb
->data
, skb
->data
+ ETH_ALEN
);
1876 meshhdrlen
= ieee80211_new_mesh_header(sdata
, &mesh_hdr
,
1879 /* DS -> MBSS (802.11-2012 13.11.3.3).
1880 * For unicast with unknown forwarding information,
1881 * destination might be in the MBSS or if that fails
1882 * forwarded to another mesh gate. In either case
1883 * resolution will be handled in ieee80211_xmit(), so
1884 * leave the original DA. This also works for mcast */
1885 const u8
*mesh_da
= skb
->data
;
1888 mesh_da
= mppath
->mpp
;
1890 mesh_da
= mpath
->dst
;
1892 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1893 mesh_da
, sdata
->vif
.addr
);
1894 if (is_multicast_ether_addr(mesh_da
))
1895 /* DA TA mSA AE:SA */
1896 meshhdrlen
= ieee80211_new_mesh_header(
1898 skb
->data
+ ETH_ALEN
, NULL
);
1900 /* RA TA mDA mSA AE:DA SA */
1901 meshhdrlen
= ieee80211_new_mesh_header(
1902 sdata
, &mesh_hdr
, skb
->data
,
1903 skb
->data
+ ETH_ALEN
);
1906 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1909 band
= chanctx_conf
->def
.chan
->band
;
1912 case NL80211_IFTYPE_STATION
:
1913 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
1914 bool tdls_peer
= false;
1916 sta
= sta_info_get(sdata
, skb
->data
);
1918 authorized
= test_sta_flag(sta
,
1919 WLAN_STA_AUTHORIZED
);
1920 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1921 tdls_peer
= test_sta_flag(sta
,
1922 WLAN_STA_TDLS_PEER
);
1923 tdls_auth
= test_sta_flag(sta
,
1924 WLAN_STA_TDLS_PEER_AUTH
);
1928 * If the TDLS link is enabled, send everything
1929 * directly. Otherwise, allow TDLS setup frames
1930 * to be transmitted indirectly.
1932 tdls_direct
= tdls_peer
&& (tdls_auth
||
1933 !(ethertype
== ETH_P_TDLS
&& skb
->len
> 14 &&
1934 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
));
1938 /* link during setup - throw out frames to peer */
1943 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1944 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1945 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1947 } else if (sdata
->u
.mgd
.use_4addr
&&
1948 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
1949 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
1950 IEEE80211_FCTL_TODS
);
1952 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1953 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1954 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1955 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1958 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
1960 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1961 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1962 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1965 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1968 band
= chanctx_conf
->def
.chan
->band
;
1970 case NL80211_IFTYPE_ADHOC
:
1972 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1973 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1974 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
1976 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1979 band
= chanctx_conf
->def
.chan
->band
;
1986 * There's no need to try to look up the destination
1987 * if it is a multicast address (which can only happen
1990 multicast
= is_multicast_ether_addr(hdr
.addr1
);
1992 sta
= sta_info_get(sdata
, hdr
.addr1
);
1994 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1995 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1999 /* For mesh, the use of the QoS header is mandatory */
2000 if (ieee80211_vif_is_mesh(&sdata
->vif
))
2003 /* receiver and we are QoS enabled, use a QoS type frame */
2004 if (wme_sta
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
) {
2005 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2010 * Drop unicast frames to unauthorised stations unless they are
2011 * EAPOL frames from the local station.
2013 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2014 !multicast
&& !authorized
&&
2015 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
2016 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
2017 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2018 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2019 dev
->name
, hdr
.addr1
);
2022 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
2027 if (unlikely(!multicast
&& skb
->sk
&&
2028 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
2029 struct sk_buff
*orig_skb
= skb
;
2031 skb
= skb_clone(skb
, GFP_ATOMIC
);
2033 unsigned long flags
;
2036 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
2037 id
= idr_alloc(&local
->ack_status_frames
, orig_skb
,
2038 1, 0x10000, GFP_ATOMIC
);
2039 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2043 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2044 } else if (skb_shared(skb
)) {
2045 kfree_skb(orig_skb
);
2051 /* couldn't clone -- lose tx status ... */
2057 * If the skb is shared we need to obtain our own copy.
2059 if (skb_shared(skb
)) {
2060 struct sk_buff
*tmp_skb
= skb
;
2062 /* can't happen -- skb is a clone if info_id != 0 */
2065 skb
= skb_clone(skb
, GFP_ATOMIC
);
2072 hdr
.frame_control
= fc
;
2073 hdr
.duration_id
= 0;
2076 skip_header_bytes
= ETH_HLEN
;
2077 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2078 encaps_data
= bridge_tunnel_header
;
2079 encaps_len
= sizeof(bridge_tunnel_header
);
2080 skip_header_bytes
-= 2;
2081 } else if (ethertype
>= ETH_P_802_3_MIN
) {
2082 encaps_data
= rfc1042_header
;
2083 encaps_len
= sizeof(rfc1042_header
);
2084 skip_header_bytes
-= 2;
2090 nh_pos
= skb_network_header(skb
) - skb
->data
;
2091 h_pos
= skb_transport_header(skb
) - skb
->data
;
2093 skb_pull(skb
, skip_header_bytes
);
2094 nh_pos
-= skip_header_bytes
;
2095 h_pos
-= skip_header_bytes
;
2097 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2100 * So we need to modify the skb header and hence need a copy of
2101 * that. The head_need variable above doesn't, so far, include
2102 * the needed header space that we don't need right away. If we
2103 * can, then we don't reallocate right now but only after the
2104 * frame arrives at the master device (if it does...)
2106 * If we cannot, however, then we will reallocate to include all
2107 * the ever needed space. Also, if we need to reallocate it anyway,
2108 * make it big enough for everything we may ever need.
2111 if (head_need
> 0 || skb_cloned(skb
)) {
2112 head_need
+= IEEE80211_ENCRYPT_HEADROOM
;
2113 head_need
+= local
->tx_headroom
;
2114 head_need
= max_t(int, 0, head_need
);
2115 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true)) {
2116 ieee80211_free_txskb(&local
->hw
, skb
);
2123 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2124 nh_pos
+= encaps_len
;
2125 h_pos
+= encaps_len
;
2128 #ifdef CONFIG_MAC80211_MESH
2129 if (meshhdrlen
> 0) {
2130 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2131 nh_pos
+= meshhdrlen
;
2132 h_pos
+= meshhdrlen
;
2136 if (ieee80211_is_data_qos(fc
)) {
2137 __le16
*qos_control
;
2139 qos_control
= (__le16
*) skb_push(skb
, 2);
2140 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2142 * Maybe we could actually set some fields here, for now just
2143 * initialise to zero to indicate no special operation.
2147 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2152 dev
->stats
.tx_packets
++;
2153 dev
->stats
.tx_bytes
+= skb
->len
;
2155 /* Update skb pointers to various headers since this modified frame
2156 * is going to go through Linux networking code that may potentially
2157 * need things like pointer to IP header. */
2158 skb_set_mac_header(skb
, 0);
2159 skb_set_network_header(skb
, nh_pos
);
2160 skb_set_transport_header(skb
, h_pos
);
2162 info
= IEEE80211_SKB_CB(skb
);
2163 memset(info
, 0, sizeof(*info
));
2165 dev
->trans_start
= jiffies
;
2167 info
->flags
= info_flags
;
2168 info
->ack_frame_id
= info_id
;
2170 ieee80211_xmit(sdata
, skb
, band
);
2173 return NETDEV_TX_OK
;
2179 return NETDEV_TX_OK
;
2184 * ieee80211_clear_tx_pending may not be called in a context where
2185 * it is possible that it packets could come in again.
2187 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
2189 struct sk_buff
*skb
;
2192 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2193 while ((skb
= skb_dequeue(&local
->pending
[i
])) != NULL
)
2194 ieee80211_free_txskb(&local
->hw
, skb
);
2199 * Returns false if the frame couldn't be transmitted but was queued instead,
2200 * which in this case means re-queued -- take as an indication to stop sending
2201 * more pending frames.
2203 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
2204 struct sk_buff
*skb
)
2206 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2207 struct ieee80211_sub_if_data
*sdata
;
2208 struct sta_info
*sta
;
2209 struct ieee80211_hdr
*hdr
;
2211 struct ieee80211_chanctx_conf
*chanctx_conf
;
2213 sdata
= vif_to_sdata(info
->control
.vif
);
2215 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
2216 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2217 if (unlikely(!chanctx_conf
)) {
2221 result
= ieee80211_tx(sdata
, skb
, true,
2222 chanctx_conf
->def
.chan
->band
);
2224 struct sk_buff_head skbs
;
2226 __skb_queue_head_init(&skbs
);
2227 __skb_queue_tail(&skbs
, skb
);
2229 hdr
= (struct ieee80211_hdr
*)skb
->data
;
2230 sta
= sta_info_get(sdata
, hdr
->addr1
);
2232 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
2239 * Transmit all pending packets. Called from tasklet.
2241 void ieee80211_tx_pending(unsigned long data
)
2243 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
2244 unsigned long flags
;
2250 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
2251 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2253 * If queue is stopped by something other than due to pending
2254 * frames, or we have no pending frames, proceed to next queue.
2256 if (local
->queue_stop_reasons
[i
] ||
2257 skb_queue_empty(&local
->pending
[i
]))
2260 while (!skb_queue_empty(&local
->pending
[i
])) {
2261 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
2262 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2264 if (WARN_ON(!info
->control
.vif
)) {
2265 ieee80211_free_txskb(&local
->hw
, skb
);
2269 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
2272 txok
= ieee80211_tx_pending_skb(local
, skb
);
2273 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
2279 if (skb_queue_empty(&local
->pending
[i
]))
2280 ieee80211_propagate_queue_wake(local
, i
);
2282 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
2287 /* functions for drivers to get certain frames */
2289 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2290 struct ps_data
*ps
, struct sk_buff
*skb
)
2294 int i
, have_bits
= 0, n1
, n2
;
2296 /* Generate bitmap for TIM only if there are any STAs in power save
2298 if (atomic_read(&ps
->num_sta_ps
) > 0)
2299 /* in the hope that this is faster than
2300 * checking byte-for-byte */
2301 have_bits
= !bitmap_empty((unsigned long*)ps
->tim
,
2302 IEEE80211_MAX_AID
+1);
2304 if (ps
->dtim_count
== 0)
2305 ps
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
2309 tim
= pos
= (u8
*) skb_put(skb
, 6);
2310 *pos
++ = WLAN_EID_TIM
;
2312 *pos
++ = ps
->dtim_count
;
2313 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
2315 if (ps
->dtim_count
== 0 && !skb_queue_empty(&ps
->bc_buf
))
2318 ps
->dtim_bc_mc
= aid0
== 1;
2321 /* Find largest even number N1 so that bits numbered 1 through
2322 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2323 * (N2 + 1) x 8 through 2007 are 0. */
2325 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
2332 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
2339 /* Bitmap control */
2341 /* Part Virt Bitmap */
2342 skb_put(skb
, n2
- n1
);
2343 memcpy(pos
, ps
->tim
+ n1
, n2
- n1
+ 1);
2345 tim
[1] = n2
- n1
+ 4;
2347 *pos
++ = aid0
; /* Bitmap control */
2348 *pos
++ = 0; /* Part Virt Bitmap */
2352 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2353 struct ps_data
*ps
, struct sk_buff
*skb
)
2355 struct ieee80211_local
*local
= sdata
->local
;
2358 * Not very nice, but we want to allow the driver to call
2359 * ieee80211_beacon_get() as a response to the set_tim()
2360 * callback. That, however, is already invoked under the
2361 * sta_lock to guarantee consistent and race-free update
2362 * of the tim bitmap in mac80211 and the driver.
2364 if (local
->tim_in_locked_section
) {
2365 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2367 spin_lock_bh(&local
->tim_lock
);
2368 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2369 spin_unlock_bh(&local
->tim_lock
);
2375 void ieee80211_csa_finish(struct ieee80211_vif
*vif
)
2377 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2379 ieee80211_queue_work(&sdata
->local
->hw
,
2380 &sdata
->csa_finalize_work
);
2382 EXPORT_SYMBOL(ieee80211_csa_finish
);
2384 static void ieee80211_update_csa(struct ieee80211_sub_if_data
*sdata
,
2385 struct beacon_data
*beacon
)
2387 struct probe_resp
*resp
;
2388 int counter_offset_beacon
= sdata
->csa_counter_offset_beacon
;
2389 int counter_offset_presp
= sdata
->csa_counter_offset_presp
;
2391 size_t beacon_data_len
;
2393 switch (sdata
->vif
.type
) {
2394 case NL80211_IFTYPE_AP
:
2395 beacon_data
= beacon
->tail
;
2396 beacon_data_len
= beacon
->tail_len
;
2398 case NL80211_IFTYPE_ADHOC
:
2399 beacon_data
= beacon
->head
;
2400 beacon_data_len
= beacon
->head_len
;
2402 case NL80211_IFTYPE_MESH_POINT
:
2403 beacon_data
= beacon
->head
;
2404 beacon_data_len
= beacon
->head_len
;
2409 if (WARN_ON(counter_offset_beacon
>= beacon_data_len
))
2412 /* warn if the driver did not check for/react to csa completeness */
2413 if (WARN_ON(beacon_data
[counter_offset_beacon
] == 0))
2416 beacon_data
[counter_offset_beacon
]--;
2418 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
&& counter_offset_presp
) {
2420 resp
= rcu_dereference(sdata
->u
.ap
.probe_resp
);
2422 /* if nl80211 accepted the offset, this should not happen. */
2423 if (WARN_ON(!resp
)) {
2427 resp
->data
[counter_offset_presp
]--;
2432 bool ieee80211_csa_is_complete(struct ieee80211_vif
*vif
)
2434 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2435 struct beacon_data
*beacon
= NULL
;
2437 size_t beacon_data_len
;
2438 int counter_beacon
= sdata
->csa_counter_offset_beacon
;
2441 if (!ieee80211_sdata_running(sdata
))
2445 if (vif
->type
== NL80211_IFTYPE_AP
) {
2446 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2448 beacon
= rcu_dereference(ap
->beacon
);
2449 if (WARN_ON(!beacon
|| !beacon
->tail
))
2451 beacon_data
= beacon
->tail
;
2452 beacon_data_len
= beacon
->tail_len
;
2453 } else if (vif
->type
== NL80211_IFTYPE_ADHOC
) {
2454 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2456 beacon
= rcu_dereference(ifibss
->presp
);
2460 beacon_data
= beacon
->head
;
2461 beacon_data_len
= beacon
->head_len
;
2462 } else if (vif
->type
== NL80211_IFTYPE_MESH_POINT
) {
2463 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2465 beacon
= rcu_dereference(ifmsh
->beacon
);
2469 beacon_data
= beacon
->head
;
2470 beacon_data_len
= beacon
->head_len
;
2476 if (WARN_ON(counter_beacon
> beacon_data_len
))
2479 if (beacon_data
[counter_beacon
] == 0)
2486 EXPORT_SYMBOL(ieee80211_csa_is_complete
);
2488 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
2489 struct ieee80211_vif
*vif
,
2490 u16
*tim_offset
, u16
*tim_length
)
2492 struct ieee80211_local
*local
= hw_to_local(hw
);
2493 struct sk_buff
*skb
= NULL
;
2494 struct ieee80211_tx_info
*info
;
2495 struct ieee80211_sub_if_data
*sdata
= NULL
;
2496 enum ieee80211_band band
;
2497 struct ieee80211_tx_rate_control txrc
;
2498 struct ieee80211_chanctx_conf
*chanctx_conf
;
2502 sdata
= vif_to_sdata(vif
);
2503 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2505 if (!ieee80211_sdata_running(sdata
) || !chanctx_conf
)
2513 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2514 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2515 struct beacon_data
*beacon
= rcu_dereference(ap
->beacon
);
2518 if (sdata
->vif
.csa_active
)
2519 ieee80211_update_csa(sdata
, beacon
);
2522 * headroom, head length,
2523 * tail length and maximum TIM length
2525 skb
= dev_alloc_skb(local
->tx_headroom
+
2527 beacon
->tail_len
+ 256);
2531 skb_reserve(skb
, local
->tx_headroom
);
2532 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
2535 ieee80211_beacon_add_tim(sdata
, &ap
->ps
, skb
);
2538 *tim_offset
= beacon
->head_len
;
2540 *tim_length
= skb
->len
- beacon
->head_len
;
2543 memcpy(skb_put(skb
, beacon
->tail_len
),
2544 beacon
->tail
, beacon
->tail_len
);
2547 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2548 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2549 struct ieee80211_hdr
*hdr
;
2550 struct beacon_data
*presp
= rcu_dereference(ifibss
->presp
);
2555 if (sdata
->vif
.csa_active
)
2556 ieee80211_update_csa(sdata
, presp
);
2559 skb
= dev_alloc_skb(local
->tx_headroom
+ presp
->head_len
);
2562 skb_reserve(skb
, local
->tx_headroom
);
2563 memcpy(skb_put(skb
, presp
->head_len
), presp
->head
,
2566 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2567 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2568 IEEE80211_STYPE_BEACON
);
2569 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2570 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2571 struct beacon_data
*bcn
= rcu_dereference(ifmsh
->beacon
);
2576 if (sdata
->vif
.csa_active
)
2577 ieee80211_update_csa(sdata
, bcn
);
2579 if (ifmsh
->sync_ops
)
2580 ifmsh
->sync_ops
->adjust_tbtt(
2583 skb
= dev_alloc_skb(local
->tx_headroom
+
2589 skb_reserve(skb
, local
->tx_headroom
);
2590 memcpy(skb_put(skb
, bcn
->head_len
), bcn
->head
, bcn
->head_len
);
2591 ieee80211_beacon_add_tim(sdata
, &ifmsh
->ps
, skb
);
2592 memcpy(skb_put(skb
, bcn
->tail_len
), bcn
->tail
, bcn
->tail_len
);
2598 band
= chanctx_conf
->def
.chan
->band
;
2600 info
= IEEE80211_SKB_CB(skb
);
2602 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
2603 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
2606 memset(&txrc
, 0, sizeof(txrc
));
2608 txrc
.sband
= local
->hw
.wiphy
->bands
[band
];
2609 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
2611 txrc
.reported_rate
.idx
= -1;
2612 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
2613 if (txrc
.rate_idx_mask
== (1 << txrc
.sband
->n_bitrates
) - 1)
2614 txrc
.max_rate_idx
= -1;
2616 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
2618 rate_control_get_rate(sdata
, NULL
, &txrc
);
2620 info
->control
.vif
= vif
;
2622 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
2623 IEEE80211_TX_CTL_ASSIGN_SEQ
|
2624 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
2629 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
2631 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
2632 struct ieee80211_vif
*vif
)
2634 struct ieee80211_if_ap
*ap
= NULL
;
2635 struct sk_buff
*skb
= NULL
;
2636 struct probe_resp
*presp
= NULL
;
2637 struct ieee80211_hdr
*hdr
;
2638 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2640 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
2646 presp
= rcu_dereference(ap
->probe_resp
);
2650 skb
= dev_alloc_skb(presp
->len
);
2654 memcpy(skb_put(skb
, presp
->len
), presp
->data
, presp
->len
);
2656 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2657 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
2663 EXPORT_SYMBOL(ieee80211_proberesp_get
);
2665 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
2666 struct ieee80211_vif
*vif
)
2668 struct ieee80211_sub_if_data
*sdata
;
2669 struct ieee80211_if_managed
*ifmgd
;
2670 struct ieee80211_pspoll
*pspoll
;
2671 struct ieee80211_local
*local
;
2672 struct sk_buff
*skb
;
2674 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2677 sdata
= vif_to_sdata(vif
);
2678 ifmgd
= &sdata
->u
.mgd
;
2679 local
= sdata
->local
;
2681 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
2685 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2687 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
2688 memset(pspoll
, 0, sizeof(*pspoll
));
2689 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
2690 IEEE80211_STYPE_PSPOLL
);
2691 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
2693 /* aid in PS-Poll has its two MSBs each set to 1 */
2694 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
2696 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
2697 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
2701 EXPORT_SYMBOL(ieee80211_pspoll_get
);
2703 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
2704 struct ieee80211_vif
*vif
)
2706 struct ieee80211_hdr_3addr
*nullfunc
;
2707 struct ieee80211_sub_if_data
*sdata
;
2708 struct ieee80211_if_managed
*ifmgd
;
2709 struct ieee80211_local
*local
;
2710 struct sk_buff
*skb
;
2712 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2715 sdata
= vif_to_sdata(vif
);
2716 ifmgd
= &sdata
->u
.mgd
;
2717 local
= sdata
->local
;
2719 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*nullfunc
));
2723 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2725 nullfunc
= (struct ieee80211_hdr_3addr
*) skb_put(skb
,
2727 memset(nullfunc
, 0, sizeof(*nullfunc
));
2728 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
2729 IEEE80211_STYPE_NULLFUNC
|
2730 IEEE80211_FCTL_TODS
);
2731 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
2732 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
2733 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
2737 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
2739 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
2740 struct ieee80211_vif
*vif
,
2741 const u8
*ssid
, size_t ssid_len
,
2744 struct ieee80211_sub_if_data
*sdata
;
2745 struct ieee80211_local
*local
;
2746 struct ieee80211_hdr_3addr
*hdr
;
2747 struct sk_buff
*skb
;
2751 sdata
= vif_to_sdata(vif
);
2752 local
= sdata
->local
;
2753 ie_ssid_len
= 2 + ssid_len
;
2755 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
2756 ie_ssid_len
+ tailroom
);
2760 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2762 hdr
= (struct ieee80211_hdr_3addr
*) skb_put(skb
, sizeof(*hdr
));
2763 memset(hdr
, 0, sizeof(*hdr
));
2764 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2765 IEEE80211_STYPE_PROBE_REQ
);
2766 eth_broadcast_addr(hdr
->addr1
);
2767 memcpy(hdr
->addr2
, vif
->addr
, ETH_ALEN
);
2768 eth_broadcast_addr(hdr
->addr3
);
2770 pos
= skb_put(skb
, ie_ssid_len
);
2771 *pos
++ = WLAN_EID_SSID
;
2774 memcpy(pos
, ssid
, ssid_len
);
2779 EXPORT_SYMBOL(ieee80211_probereq_get
);
2781 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2782 const void *frame
, size_t frame_len
,
2783 const struct ieee80211_tx_info
*frame_txctl
,
2784 struct ieee80211_rts
*rts
)
2786 const struct ieee80211_hdr
*hdr
= frame
;
2788 rts
->frame_control
=
2789 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
2790 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
2792 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
2793 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
2795 EXPORT_SYMBOL(ieee80211_rts_get
);
2797 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2798 const void *frame
, size_t frame_len
,
2799 const struct ieee80211_tx_info
*frame_txctl
,
2800 struct ieee80211_cts
*cts
)
2802 const struct ieee80211_hdr
*hdr
= frame
;
2804 cts
->frame_control
=
2805 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
2806 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
2807 frame_len
, frame_txctl
);
2808 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
2810 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
2813 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
2814 struct ieee80211_vif
*vif
)
2816 struct ieee80211_local
*local
= hw_to_local(hw
);
2817 struct sk_buff
*skb
= NULL
;
2818 struct ieee80211_tx_data tx
;
2819 struct ieee80211_sub_if_data
*sdata
;
2821 struct ieee80211_tx_info
*info
;
2822 struct ieee80211_chanctx_conf
*chanctx_conf
;
2824 sdata
= vif_to_sdata(vif
);
2827 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2832 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2833 struct beacon_data
*beacon
=
2834 rcu_dereference(sdata
->u
.ap
.beacon
);
2836 if (!beacon
|| !beacon
->head
)
2839 ps
= &sdata
->u
.ap
.ps
;
2840 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2841 ps
= &sdata
->u
.mesh
.ps
;
2846 if (ps
->dtim_count
!= 0 || !ps
->dtim_bc_mc
)
2847 goto out
; /* send buffered bc/mc only after DTIM beacon */
2850 skb
= skb_dequeue(&ps
->bc_buf
);
2853 local
->total_ps_buffered
--;
2855 if (!skb_queue_empty(&ps
->bc_buf
) && skb
->len
>= 2) {
2856 struct ieee80211_hdr
*hdr
=
2857 (struct ieee80211_hdr
*) skb
->data
;
2858 /* more buffered multicast/broadcast frames ==> set
2859 * MoreData flag in IEEE 802.11 header to inform PS
2861 hdr
->frame_control
|=
2862 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
2865 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
2866 sdata
= IEEE80211_DEV_TO_SUB_IF(skb
->dev
);
2867 if (!ieee80211_tx_prepare(sdata
, &tx
, skb
))
2869 dev_kfree_skb_any(skb
);
2872 info
= IEEE80211_SKB_CB(skb
);
2874 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
2875 info
->band
= chanctx_conf
->def
.chan
->band
;
2877 if (invoke_tx_handlers(&tx
))
2884 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
2886 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data
*sdata
,
2887 struct sk_buff
*skb
, int tid
,
2888 enum ieee80211_band band
)
2890 int ac
= ieee802_1d_to_ac
[tid
& 7];
2892 skb_set_mac_header(skb
, 0);
2893 skb_set_network_header(skb
, 0);
2894 skb_set_transport_header(skb
, 0);
2896 skb_set_queue_mapping(skb
, ac
);
2897 skb
->priority
= tid
;
2899 skb
->dev
= sdata
->dev
;
2902 * The other path calling ieee80211_xmit is from the tasklet,
2903 * and while we can handle concurrent transmissions locking
2904 * requirements are that we do not come into tx with bhs on.
2907 ieee80211_xmit(sdata
, skb
, band
);