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_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
468 struct ieee80211_local
*local
= tx
->local
;
473 if (unlikely((test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
474 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) &&
475 !(info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
))) {
476 int ac
= skb_get_queue_mapping(tx
->skb
);
478 /* only deauth, disassoc and action are bufferable MMPDUs */
479 if (ieee80211_is_mgmt(hdr
->frame_control
) &&
480 !ieee80211_is_deauth(hdr
->frame_control
) &&
481 !ieee80211_is_disassoc(hdr
->frame_control
) &&
482 !ieee80211_is_action(hdr
->frame_control
)) {
483 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
487 ps_dbg(sta
->sdata
, "STA %pM aid %d: PS buffer for AC %d\n",
488 sta
->sta
.addr
, sta
->sta
.aid
, ac
);
489 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
490 purge_old_ps_buffers(tx
->local
);
491 if (skb_queue_len(&sta
->ps_tx_buf
[ac
]) >= STA_MAX_TX_BUFFER
) {
492 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
[ac
]);
494 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
496 ieee80211_free_txskb(&local
->hw
, old
);
498 tx
->local
->total_ps_buffered
++;
500 info
->control
.jiffies
= jiffies
;
501 info
->control
.vif
= &tx
->sdata
->vif
;
502 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
503 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
504 skb_queue_tail(&sta
->ps_tx_buf
[ac
], tx
->skb
);
506 if (!timer_pending(&local
->sta_cleanup
))
507 mod_timer(&local
->sta_cleanup
,
508 round_jiffies(jiffies
+
509 STA_INFO_CLEANUP_INTERVAL
));
512 * We queued up some frames, so the TIM bit might
513 * need to be set, recalculate it.
515 sta_info_recalc_tim(sta
);
518 } else if (unlikely(test_sta_flag(sta
, WLAN_STA_PS_STA
))) {
520 "STA %pM in PS mode, but polling/in SP -> send frame\n",
527 static ieee80211_tx_result debug_noinline
528 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data
*tx
)
530 if (unlikely(tx
->flags
& IEEE80211_TX_PS_BUFFERED
))
533 if (tx
->flags
& IEEE80211_TX_UNICAST
)
534 return ieee80211_tx_h_unicast_ps_buf(tx
);
536 return ieee80211_tx_h_multicast_ps_buf(tx
);
539 static ieee80211_tx_result debug_noinline
540 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data
*tx
)
542 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
544 if (unlikely(tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
)) {
545 if (tx
->sdata
->control_port_no_encrypt
)
546 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
547 info
->control
.flags
|= IEEE80211_TX_CTRL_PORT_CTRL_PROTO
;
553 static ieee80211_tx_result debug_noinline
554 ieee80211_tx_h_select_key(struct ieee80211_tx_data
*tx
)
556 struct ieee80211_key
*key
;
557 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
558 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
560 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
))
563 (key
= rcu_dereference(tx
->sta
->ptk
[tx
->sta
->ptk_idx
])))
565 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
566 is_multicast_ether_addr(hdr
->addr1
) &&
567 ieee80211_is_robust_mgmt_frame(hdr
) &&
568 (key
= rcu_dereference(tx
->sdata
->default_mgmt_key
)))
570 else if (is_multicast_ether_addr(hdr
->addr1
) &&
571 (key
= rcu_dereference(tx
->sdata
->default_multicast_key
)))
573 else if (!is_multicast_ether_addr(hdr
->addr1
) &&
574 (key
= rcu_dereference(tx
->sdata
->default_unicast_key
)))
576 else if (info
->flags
& IEEE80211_TX_CTL_INJECTED
)
578 else if (!tx
->sdata
->drop_unencrypted
)
580 else if (tx
->skb
->protocol
== tx
->sdata
->control_port_protocol
)
582 else if (ieee80211_is_robust_mgmt_frame(hdr
) &&
583 !(ieee80211_is_action(hdr
->frame_control
) &&
584 tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_MFP
)))
586 else if (ieee80211_is_mgmt(hdr
->frame_control
) &&
587 !ieee80211_is_robust_mgmt_frame(hdr
))
590 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_unencrypted
);
595 bool skip_hw
= false;
597 tx
->key
->tx_rx_count
++;
598 /* TODO: add threshold stuff again */
600 switch (tx
->key
->conf
.cipher
) {
601 case WLAN_CIPHER_SUITE_WEP40
:
602 case WLAN_CIPHER_SUITE_WEP104
:
603 case WLAN_CIPHER_SUITE_TKIP
:
604 if (!ieee80211_is_data_present(hdr
->frame_control
))
607 case WLAN_CIPHER_SUITE_CCMP
:
608 if (!ieee80211_is_data_present(hdr
->frame_control
) &&
609 !ieee80211_use_mfp(hdr
->frame_control
, tx
->sta
,
613 skip_hw
= (tx
->key
->conf
.flags
&
614 IEEE80211_KEY_FLAG_SW_MGMT_TX
) &&
615 ieee80211_is_mgmt(hdr
->frame_control
);
617 case WLAN_CIPHER_SUITE_AES_CMAC
:
618 if (!ieee80211_is_mgmt(hdr
->frame_control
))
623 if (unlikely(tx
->key
&& tx
->key
->flags
& KEY_FLAG_TAINTED
&&
624 !ieee80211_is_deauth(hdr
->frame_control
)))
627 if (!skip_hw
&& tx
->key
&&
628 tx
->key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
)
629 info
->control
.hw_key
= &tx
->key
->conf
;
635 static ieee80211_tx_result debug_noinline
636 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data
*tx
)
638 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
639 struct ieee80211_hdr
*hdr
= (void *)tx
->skb
->data
;
640 struct ieee80211_supported_band
*sband
;
642 struct ieee80211_tx_rate_control txrc
;
643 struct ieee80211_sta_rates
*ratetbl
= NULL
;
646 memset(&txrc
, 0, sizeof(txrc
));
648 sband
= tx
->local
->hw
.wiphy
->bands
[info
->band
];
650 len
= min_t(u32
, tx
->skb
->len
+ FCS_LEN
,
651 tx
->local
->hw
.wiphy
->frag_threshold
);
653 /* set up the tx rate control struct we give the RC algo */
654 txrc
.hw
= &tx
->local
->hw
;
656 txrc
.bss_conf
= &tx
->sdata
->vif
.bss_conf
;
658 txrc
.reported_rate
.idx
= -1;
659 txrc
.rate_idx_mask
= tx
->sdata
->rc_rateidx_mask
[info
->band
];
660 if (txrc
.rate_idx_mask
== (1 << sband
->n_bitrates
) - 1)
661 txrc
.max_rate_idx
= -1;
663 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
665 if (tx
->sdata
->rc_has_mcs_mask
[info
->band
])
666 txrc
.rate_idx_mcs_mask
=
667 tx
->sdata
->rc_rateidx_mcs_mask
[info
->band
];
669 txrc
.bss
= (tx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
670 tx
->sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
||
671 tx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
);
673 /* set up RTS protection if desired */
674 if (len
> tx
->local
->hw
.wiphy
->rts_threshold
) {
678 info
->control
.use_rts
= txrc
.rts
;
679 info
->control
.use_cts_prot
= tx
->sdata
->vif
.bss_conf
.use_cts_prot
;
682 * Use short preamble if the BSS can handle it, but not for
683 * management frames unless we know the receiver can handle
684 * that -- the management frame might be to a station that
685 * just wants a probe response.
687 if (tx
->sdata
->vif
.bss_conf
.use_short_preamble
&&
688 (ieee80211_is_data(hdr
->frame_control
) ||
689 (tx
->sta
&& test_sta_flag(tx
->sta
, WLAN_STA_SHORT_PREAMBLE
))))
690 txrc
.short_preamble
= true;
692 info
->control
.short_preamble
= txrc
.short_preamble
;
695 assoc
= test_sta_flag(tx
->sta
, WLAN_STA_ASSOC
);
698 * Lets not bother rate control if we're associated and cannot
699 * talk to the sta. This should not happen.
701 if (WARN(test_bit(SCAN_SW_SCANNING
, &tx
->local
->scanning
) && assoc
&&
702 !rate_usable_index_exists(sband
, &tx
->sta
->sta
),
703 "%s: Dropped data frame as no usable bitrate found while "
704 "scanning and associated. Target station: "
705 "%pM on %d GHz band\n",
706 tx
->sdata
->name
, hdr
->addr1
,
711 * If we're associated with the sta at this point we know we can at
712 * least send the frame at the lowest bit rate.
714 rate_control_get_rate(tx
->sdata
, tx
->sta
, &txrc
);
716 if (tx
->sta
&& !info
->control
.skip_table
)
717 ratetbl
= rcu_dereference(tx
->sta
->sta
.rates
);
719 if (unlikely(info
->control
.rates
[0].idx
< 0)) {
721 struct ieee80211_tx_rate rate
= {
722 .idx
= ratetbl
->rate
[0].idx
,
723 .flags
= ratetbl
->rate
[0].flags
,
724 .count
= ratetbl
->rate
[0].count
727 if (ratetbl
->rate
[0].idx
< 0)
735 tx
->rate
= info
->control
.rates
[0];
738 if (txrc
.reported_rate
.idx
< 0) {
739 txrc
.reported_rate
= tx
->rate
;
740 if (tx
->sta
&& ieee80211_is_data(hdr
->frame_control
))
741 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
743 tx
->sta
->last_tx_rate
= txrc
.reported_rate
;
748 if (unlikely(!info
->control
.rates
[0].count
))
749 info
->control
.rates
[0].count
= 1;
751 if (WARN_ON_ONCE((info
->control
.rates
[0].count
> 1) &&
752 (info
->flags
& IEEE80211_TX_CTL_NO_ACK
)))
753 info
->control
.rates
[0].count
= 1;
758 static ieee80211_tx_result debug_noinline
759 ieee80211_tx_h_sequence(struct ieee80211_tx_data
*tx
)
761 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
762 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
768 * Packet injection may want to control the sequence
769 * number, if we have no matching interface then we
770 * neither assign one ourselves nor ask the driver to.
772 if (unlikely(info
->control
.vif
->type
== NL80211_IFTYPE_MONITOR
))
775 if (unlikely(ieee80211_is_ctl(hdr
->frame_control
)))
778 if (ieee80211_hdrlen(hdr
->frame_control
) < 24)
781 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
785 * Anything but QoS data that has a sequence number field
786 * (is long enough) gets a sequence number from the global
787 * counter. QoS data frames with a multicast destination
788 * also use the global counter (802.11-2012 9.3.2.10).
790 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
791 is_multicast_ether_addr(hdr
->addr1
)) {
792 /* driver should assign sequence number */
793 info
->flags
|= IEEE80211_TX_CTL_ASSIGN_SEQ
;
794 /* for pure STA mode without beacons, we can do it */
795 hdr
->seq_ctrl
= cpu_to_le16(tx
->sdata
->sequence_number
);
796 tx
->sdata
->sequence_number
+= 0x10;
801 * This should be true for injected/management frames only, for
802 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
803 * above since they are not QoS-data frames.
808 /* include per-STA, per-TID sequence counter */
810 qc
= ieee80211_get_qos_ctl(hdr
);
811 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
812 seq
= &tx
->sta
->tid_seq
[tid
];
814 hdr
->seq_ctrl
= cpu_to_le16(*seq
);
816 /* Increase the sequence number. */
817 *seq
= (*seq
+ 0x10) & IEEE80211_SCTL_SEQ
;
822 static int ieee80211_fragment(struct ieee80211_tx_data
*tx
,
823 struct sk_buff
*skb
, int hdrlen
,
826 struct ieee80211_local
*local
= tx
->local
;
827 struct ieee80211_tx_info
*info
;
829 int per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
830 int pos
= hdrlen
+ per_fragm
;
831 int rem
= skb
->len
- hdrlen
- per_fragm
;
833 if (WARN_ON(rem
< 0))
836 /* first fragment was already added to queue by caller */
839 int fraglen
= per_fragm
;
844 tmp
= dev_alloc_skb(local
->tx_headroom
+
846 tx
->sdata
->encrypt_headroom
+
847 IEEE80211_ENCRYPT_TAILROOM
);
851 __skb_queue_tail(&tx
->skbs
, tmp
);
854 local
->tx_headroom
+ tx
->sdata
->encrypt_headroom
);
856 /* copy control information */
857 memcpy(tmp
->cb
, skb
->cb
, sizeof(tmp
->cb
));
859 info
= IEEE80211_SKB_CB(tmp
);
860 info
->flags
&= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT
|
861 IEEE80211_TX_CTL_FIRST_FRAGMENT
);
864 info
->flags
|= IEEE80211_TX_CTL_MORE_FRAMES
;
866 skb_copy_queue_mapping(tmp
, skb
);
867 tmp
->priority
= skb
->priority
;
870 /* copy header and data */
871 memcpy(skb_put(tmp
, hdrlen
), skb
->data
, hdrlen
);
872 memcpy(skb_put(tmp
, fraglen
), skb
->data
+ pos
, fraglen
);
877 /* adjust first fragment's length */
878 skb
->len
= hdrlen
+ per_fragm
;
882 static ieee80211_tx_result debug_noinline
883 ieee80211_tx_h_fragment(struct ieee80211_tx_data
*tx
)
885 struct sk_buff
*skb
= tx
->skb
;
886 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
887 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
888 int frag_threshold
= tx
->local
->hw
.wiphy
->frag_threshold
;
892 /* no matter what happens, tx->skb moves to tx->skbs */
893 __skb_queue_tail(&tx
->skbs
, skb
);
896 if (info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)
899 if (tx
->local
->ops
->set_frag_threshold
)
903 * Warn when submitting a fragmented A-MPDU frame and drop it.
904 * This scenario is handled in ieee80211_tx_prepare but extra
905 * caution taken here as fragmented ampdu may cause Tx stop.
907 if (WARN_ON(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
910 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
912 /* internal error, why isn't DONTFRAG set? */
913 if (WARN_ON(skb
->len
+ FCS_LEN
<= frag_threshold
))
917 * Now fragment the frame. This will allocate all the fragments and
918 * chain them (using skb as the first fragment) to skb->next.
919 * During transmission, we will remove the successfully transmitted
920 * fragments from this list. When the low-level driver rejects one
921 * of the fragments then we will simply pretend to accept the skb
922 * but store it away as pending.
924 if (ieee80211_fragment(tx
, skb
, hdrlen
, frag_threshold
))
927 /* update duration/seq/flags of fragments */
930 skb_queue_walk(&tx
->skbs
, skb
) {
931 const __le16 morefrags
= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
933 hdr
= (void *)skb
->data
;
934 info
= IEEE80211_SKB_CB(skb
);
936 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
937 hdr
->frame_control
|= morefrags
;
939 * No multi-rate retries for fragmented frames, that
940 * would completely throw off the NAV at other STAs.
942 info
->control
.rates
[1].idx
= -1;
943 info
->control
.rates
[2].idx
= -1;
944 info
->control
.rates
[3].idx
= -1;
945 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES
!= 4);
946 info
->flags
&= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
948 hdr
->frame_control
&= ~morefrags
;
950 hdr
->seq_ctrl
|= cpu_to_le16(fragnum
& IEEE80211_SCTL_FRAG
);
957 static ieee80211_tx_result debug_noinline
958 ieee80211_tx_h_stats(struct ieee80211_tx_data
*tx
)
966 skb_queue_walk(&tx
->skbs
, skb
) {
967 ac
= skb_get_queue_mapping(skb
);
968 tx
->sta
->tx_fragments
++;
969 tx
->sta
->tx_bytes
[ac
] += skb
->len
;
972 tx
->sta
->tx_packets
[ac
]++;
977 static ieee80211_tx_result debug_noinline
978 ieee80211_tx_h_encrypt(struct ieee80211_tx_data
*tx
)
983 switch (tx
->key
->conf
.cipher
) {
984 case WLAN_CIPHER_SUITE_WEP40
:
985 case WLAN_CIPHER_SUITE_WEP104
:
986 return ieee80211_crypto_wep_encrypt(tx
);
987 case WLAN_CIPHER_SUITE_TKIP
:
988 return ieee80211_crypto_tkip_encrypt(tx
);
989 case WLAN_CIPHER_SUITE_CCMP
:
990 return ieee80211_crypto_ccmp_encrypt(tx
);
991 case WLAN_CIPHER_SUITE_AES_CMAC
:
992 return ieee80211_crypto_aes_cmac_encrypt(tx
);
994 return ieee80211_crypto_hw_encrypt(tx
);
1000 static ieee80211_tx_result debug_noinline
1001 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data
*tx
)
1003 struct sk_buff
*skb
;
1004 struct ieee80211_hdr
*hdr
;
1008 skb_queue_walk(&tx
->skbs
, skb
) {
1009 hdr
= (void *) skb
->data
;
1010 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
)))
1011 break; /* must not overwrite AID */
1012 if (!skb_queue_is_last(&tx
->skbs
, skb
)) {
1013 struct sk_buff
*next
= skb_queue_next(&tx
->skbs
, skb
);
1014 next_len
= next
->len
;
1017 group_addr
= is_multicast_ether_addr(hdr
->addr1
);
1020 ieee80211_duration(tx
, skb
, group_addr
, next_len
);
1026 /* actual transmit path */
1028 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data
*tx
,
1029 struct sk_buff
*skb
,
1030 struct ieee80211_tx_info
*info
,
1031 struct tid_ampdu_tx
*tid_tx
,
1034 bool queued
= false;
1035 bool reset_agg_timer
= false;
1036 struct sk_buff
*purge_skb
= NULL
;
1038 if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1039 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1040 reset_agg_timer
= true;
1041 } else if (test_bit(HT_AGG_STATE_WANT_START
, &tid_tx
->state
)) {
1043 * nothing -- this aggregation session is being started
1044 * but that might still fail with the driver
1047 spin_lock(&tx
->sta
->lock
);
1049 * Need to re-check now, because we may get here
1051 * 1) in the window during which the setup is actually
1052 * already done, but not marked yet because not all
1053 * packets are spliced over to the driver pending
1054 * queue yet -- if this happened we acquire the lock
1055 * either before or after the splice happens, but
1056 * need to recheck which of these cases happened.
1058 * 2) during session teardown, if the OPERATIONAL bit
1059 * was cleared due to the teardown but the pointer
1060 * hasn't been assigned NULL yet (or we loaded it
1061 * before it was assigned) -- in this case it may
1062 * now be NULL which means we should just let the
1063 * packet pass through because splicing the frames
1064 * back is already done.
1066 tid_tx
= rcu_dereference_protected_tid_tx(tx
->sta
, tid
);
1069 /* do nothing, let packet pass through */
1070 } else if (test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
)) {
1071 info
->flags
|= IEEE80211_TX_CTL_AMPDU
;
1072 reset_agg_timer
= true;
1075 info
->control
.vif
= &tx
->sdata
->vif
;
1076 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1077 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
1078 __skb_queue_tail(&tid_tx
->pending
, skb
);
1079 if (skb_queue_len(&tid_tx
->pending
) > STA_MAX_TX_BUFFER
)
1080 purge_skb
= __skb_dequeue(&tid_tx
->pending
);
1082 spin_unlock(&tx
->sta
->lock
);
1085 ieee80211_free_txskb(&tx
->local
->hw
, purge_skb
);
1088 /* reset session timer */
1089 if (reset_agg_timer
&& tid_tx
->timeout
)
1090 tid_tx
->last_tx
= jiffies
;
1098 static ieee80211_tx_result
1099 ieee80211_tx_prepare(struct ieee80211_sub_if_data
*sdata
,
1100 struct ieee80211_tx_data
*tx
,
1101 struct sk_buff
*skb
)
1103 struct ieee80211_local
*local
= sdata
->local
;
1104 struct ieee80211_hdr
*hdr
;
1105 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1109 memset(tx
, 0, sizeof(*tx
));
1113 __skb_queue_head_init(&tx
->skbs
);
1116 * If this flag is set to true anywhere, and we get here,
1117 * we are doing the needed processing, so remove the flag
1120 info
->flags
&= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
1122 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1124 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
1125 tx
->sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1126 if (!tx
->sta
&& sdata
->dev
->ieee80211_ptr
->use_4addr
)
1128 } else if (info
->flags
& (IEEE80211_TX_CTL_INJECTED
|
1129 IEEE80211_TX_INTFL_NL80211_FRAME_TX
) ||
1130 tx
->sdata
->control_port_protocol
== tx
->skb
->protocol
) {
1131 tx
->sta
= sta_info_get_bss(sdata
, hdr
->addr1
);
1134 tx
->sta
= sta_info_get(sdata
, hdr
->addr1
);
1136 if (tx
->sta
&& ieee80211_is_data_qos(hdr
->frame_control
) &&
1137 !ieee80211_is_qos_nullfunc(hdr
->frame_control
) &&
1138 (local
->hw
.flags
& IEEE80211_HW_AMPDU_AGGREGATION
) &&
1139 !(local
->hw
.flags
& IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
)) {
1140 struct tid_ampdu_tx
*tid_tx
;
1142 qc
= ieee80211_get_qos_ctl(hdr
);
1143 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
1145 tid_tx
= rcu_dereference(tx
->sta
->ampdu_mlme
.tid_tx
[tid
]);
1149 queued
= ieee80211_tx_prep_agg(tx
, skb
, info
,
1152 if (unlikely(queued
))
1157 if (is_multicast_ether_addr(hdr
->addr1
)) {
1158 tx
->flags
&= ~IEEE80211_TX_UNICAST
;
1159 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1161 tx
->flags
|= IEEE80211_TX_UNICAST
;
1163 if (!(info
->flags
& IEEE80211_TX_CTL_DONTFRAG
)) {
1164 if (!(tx
->flags
& IEEE80211_TX_UNICAST
) ||
1165 skb
->len
+ FCS_LEN
<= local
->hw
.wiphy
->frag_threshold
||
1166 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
1167 info
->flags
|= IEEE80211_TX_CTL_DONTFRAG
;
1171 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1172 else if (test_and_clear_sta_flag(tx
->sta
, WLAN_STA_CLEAR_PS_FILT
))
1173 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
;
1175 info
->flags
|= IEEE80211_TX_CTL_FIRST_FRAGMENT
;
1180 static bool ieee80211_tx_frags(struct ieee80211_local
*local
,
1181 struct ieee80211_vif
*vif
,
1182 struct ieee80211_sta
*sta
,
1183 struct sk_buff_head
*skbs
,
1186 struct ieee80211_tx_control control
;
1187 struct sk_buff
*skb
, *tmp
;
1188 unsigned long flags
;
1190 skb_queue_walk_safe(skbs
, skb
, tmp
) {
1191 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1192 int q
= info
->hw_queue
;
1194 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1195 if (WARN_ON_ONCE(q
>= local
->hw
.queues
)) {
1196 __skb_unlink(skb
, skbs
);
1197 ieee80211_free_txskb(&local
->hw
, skb
);
1202 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1203 if (local
->queue_stop_reasons
[q
] ||
1204 (!txpending
&& !skb_queue_empty(&local
->pending
[q
]))) {
1205 if (unlikely(info
->flags
&
1206 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
)) {
1207 if (local
->queue_stop_reasons
[q
] &
1208 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL
)) {
1210 * Drop off-channel frames if queues
1211 * are stopped for any reason other
1212 * than off-channel operation. Never
1215 spin_unlock_irqrestore(
1216 &local
->queue_stop_reason_lock
,
1218 ieee80211_purge_tx_queue(&local
->hw
,
1225 * Since queue is stopped, queue up frames for
1226 * later transmission from the tx-pending
1227 * tasklet when the queue is woken again.
1230 skb_queue_splice_init(skbs
,
1231 &local
->pending
[q
]);
1233 skb_queue_splice_tail_init(skbs
,
1234 &local
->pending
[q
]);
1236 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1241 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1243 info
->control
.vif
= vif
;
1246 __skb_unlink(skb
, skbs
);
1247 drv_tx(local
, &control
, skb
);
1254 * Returns false if the frame couldn't be transmitted but was queued instead.
1256 static bool __ieee80211_tx(struct ieee80211_local
*local
,
1257 struct sk_buff_head
*skbs
, int led_len
,
1258 struct sta_info
*sta
, bool txpending
)
1260 struct ieee80211_tx_info
*info
;
1261 struct ieee80211_sub_if_data
*sdata
;
1262 struct ieee80211_vif
*vif
;
1263 struct ieee80211_sta
*pubsta
;
1264 struct sk_buff
*skb
;
1268 if (WARN_ON(skb_queue_empty(skbs
)))
1271 skb
= skb_peek(skbs
);
1272 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
1273 info
= IEEE80211_SKB_CB(skb
);
1274 sdata
= vif_to_sdata(info
->control
.vif
);
1275 if (sta
&& !sta
->uploaded
)
1283 switch (sdata
->vif
.type
) {
1284 case NL80211_IFTYPE_MONITOR
:
1285 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
1289 sdata
= rcu_dereference(local
->monitor_sdata
);
1293 vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1294 } else if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
1300 case NL80211_IFTYPE_AP_VLAN
:
1301 sdata
= container_of(sdata
->bss
,
1302 struct ieee80211_sub_if_data
, u
.ap
);
1309 result
= ieee80211_tx_frags(local
, vif
, pubsta
, skbs
,
1312 ieee80211_tpt_led_trig_tx(local
, fc
, led_len
);
1314 WARN_ON_ONCE(!skb_queue_empty(skbs
));
1320 * Invoke TX handlers, return 0 on success and non-zero if the
1321 * frame was dropped or queued.
1323 static int invoke_tx_handlers(struct ieee80211_tx_data
*tx
)
1325 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(tx
->skb
);
1326 ieee80211_tx_result res
= TX_DROP
;
1328 #define CALL_TXH(txh) \
1331 if (res != TX_CONTINUE) \
1335 CALL_TXH(ieee80211_tx_h_dynamic_ps
);
1336 CALL_TXH(ieee80211_tx_h_check_assoc
);
1337 CALL_TXH(ieee80211_tx_h_ps_buf
);
1338 CALL_TXH(ieee80211_tx_h_check_control_port_protocol
);
1339 CALL_TXH(ieee80211_tx_h_select_key
);
1340 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1341 CALL_TXH(ieee80211_tx_h_rate_ctrl
);
1343 if (unlikely(info
->flags
& IEEE80211_TX_INTFL_RETRANSMISSION
)) {
1344 __skb_queue_tail(&tx
->skbs
, tx
->skb
);
1349 CALL_TXH(ieee80211_tx_h_michael_mic_add
);
1350 CALL_TXH(ieee80211_tx_h_sequence
);
1351 CALL_TXH(ieee80211_tx_h_fragment
);
1352 /* handlers after fragment must be aware of tx info fragmentation! */
1353 CALL_TXH(ieee80211_tx_h_stats
);
1354 CALL_TXH(ieee80211_tx_h_encrypt
);
1355 if (!(tx
->local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
))
1356 CALL_TXH(ieee80211_tx_h_calculate_duration
);
1360 if (unlikely(res
== TX_DROP
)) {
1361 I802_DEBUG_INC(tx
->local
->tx_handlers_drop
);
1363 ieee80211_free_txskb(&tx
->local
->hw
, tx
->skb
);
1365 ieee80211_purge_tx_queue(&tx
->local
->hw
, &tx
->skbs
);
1367 } else if (unlikely(res
== TX_QUEUED
)) {
1368 I802_DEBUG_INC(tx
->local
->tx_handlers_queued
);
1375 bool ieee80211_tx_prepare_skb(struct ieee80211_hw
*hw
,
1376 struct ieee80211_vif
*vif
, struct sk_buff
*skb
,
1377 int band
, struct ieee80211_sta
**sta
)
1379 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1380 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1381 struct ieee80211_tx_data tx
;
1383 if (ieee80211_tx_prepare(sdata
, &tx
, skb
) == TX_DROP
)
1387 info
->control
.vif
= vif
;
1388 info
->hw_queue
= vif
->hw_queue
[skb_get_queue_mapping(skb
)];
1390 if (invoke_tx_handlers(&tx
))
1395 *sta
= &tx
.sta
->sta
;
1402 EXPORT_SYMBOL(ieee80211_tx_prepare_skb
);
1405 * Returns false if the frame couldn't be transmitted but was queued instead.
1407 static bool ieee80211_tx(struct ieee80211_sub_if_data
*sdata
,
1408 struct sk_buff
*skb
, bool txpending
,
1409 enum ieee80211_band band
)
1411 struct ieee80211_local
*local
= sdata
->local
;
1412 struct ieee80211_tx_data tx
;
1413 ieee80211_tx_result res_prepare
;
1414 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1418 if (unlikely(skb
->len
< 10)) {
1423 /* initialises tx */
1425 res_prepare
= ieee80211_tx_prepare(sdata
, &tx
, skb
);
1427 if (unlikely(res_prepare
== TX_DROP
)) {
1428 ieee80211_free_txskb(&local
->hw
, skb
);
1430 } else if (unlikely(res_prepare
== TX_QUEUED
)) {
1436 /* set up hw_queue value early */
1437 if (!(info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
) ||
1438 !(local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
))
1440 sdata
->vif
.hw_queue
[skb_get_queue_mapping(skb
)];
1442 if (!invoke_tx_handlers(&tx
))
1443 result
= __ieee80211_tx(local
, &tx
.skbs
, led_len
,
1449 /* device xmit handlers */
1451 static int ieee80211_skb_resize(struct ieee80211_sub_if_data
*sdata
,
1452 struct sk_buff
*skb
,
1453 int head_need
, bool may_encrypt
)
1455 struct ieee80211_local
*local
= sdata
->local
;
1458 if (may_encrypt
&& sdata
->crypto_tx_tailroom_needed_cnt
) {
1459 tail_need
= IEEE80211_ENCRYPT_TAILROOM
;
1460 tail_need
-= skb_tailroom(skb
);
1461 tail_need
= max_t(int, tail_need
, 0);
1464 if (skb_cloned(skb
))
1465 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1466 else if (head_need
|| tail_need
)
1467 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1471 if (pskb_expand_head(skb
, head_need
, tail_need
, GFP_ATOMIC
)) {
1472 wiphy_debug(local
->hw
.wiphy
,
1473 "failed to reallocate TX buffer\n");
1480 void ieee80211_xmit(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
1481 enum ieee80211_band band
)
1483 struct ieee80211_local
*local
= sdata
->local
;
1484 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1485 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1489 may_encrypt
= !(info
->flags
& IEEE80211_TX_INTFL_DONT_ENCRYPT
);
1491 headroom
= local
->tx_headroom
;
1493 headroom
+= sdata
->encrypt_headroom
;
1494 headroom
-= skb_headroom(skb
);
1495 headroom
= max_t(int, 0, headroom
);
1497 if (ieee80211_skb_resize(sdata
, skb
, headroom
, may_encrypt
)) {
1498 ieee80211_free_txskb(&local
->hw
, skb
);
1502 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1503 info
->control
.vif
= &sdata
->vif
;
1505 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1506 if (ieee80211_is_data(hdr
->frame_control
) &&
1507 is_unicast_ether_addr(hdr
->addr1
)) {
1508 if (mesh_nexthop_resolve(sdata
, skb
))
1509 return; /* skb queued: don't free */
1511 ieee80211_mps_set_frame_flags(sdata
, NULL
, hdr
);
1515 ieee80211_set_qos_hdr(sdata
, skb
);
1516 ieee80211_tx(sdata
, skb
, false, band
);
1519 static bool ieee80211_parse_tx_radiotap(struct sk_buff
*skb
)
1521 struct ieee80211_radiotap_iterator iterator
;
1522 struct ieee80211_radiotap_header
*rthdr
=
1523 (struct ieee80211_radiotap_header
*) skb
->data
;
1524 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1525 int ret
= ieee80211_radiotap_iterator_init(&iterator
, rthdr
, skb
->len
,
1529 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1530 IEEE80211_TX_CTL_DONTFRAG
;
1533 * for every radiotap entry that is present
1534 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1535 * entries present, or -EINVAL on error)
1539 ret
= ieee80211_radiotap_iterator_next(&iterator
);
1544 /* see if this argument is something we can use */
1545 switch (iterator
.this_arg_index
) {
1547 * You must take care when dereferencing iterator.this_arg
1548 * for multibyte types... the pointer is not aligned. Use
1549 * get_unaligned((type *)iterator.this_arg) to dereference
1550 * iterator.this_arg for type "type" safely on all arches.
1552 case IEEE80211_RADIOTAP_FLAGS
:
1553 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FCS
) {
1555 * this indicates that the skb we have been
1556 * handed has the 32-bit FCS CRC at the end...
1557 * we should react to that by snipping it off
1558 * because it will be recomputed and added
1561 if (skb
->len
< (iterator
._max_length
+ FCS_LEN
))
1564 skb_trim(skb
, skb
->len
- FCS_LEN
);
1566 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_WEP
)
1567 info
->flags
&= ~IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1568 if (*iterator
.this_arg
& IEEE80211_RADIOTAP_F_FRAG
)
1569 info
->flags
&= ~IEEE80211_TX_CTL_DONTFRAG
;
1572 case IEEE80211_RADIOTAP_TX_FLAGS
:
1573 txflags
= get_unaligned_le16(iterator
.this_arg
);
1574 if (txflags
& IEEE80211_RADIOTAP_F_TX_NOACK
)
1575 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
1579 * Please update the file
1580 * Documentation/networking/mac80211-injection.txt
1581 * when parsing new fields here.
1589 if (ret
!= -ENOENT
) /* ie, if we didn't simply run out of fields */
1593 * remove the radiotap header
1594 * iterator->_max_length was sanity-checked against
1595 * skb->len by iterator init
1597 skb_pull(skb
, iterator
._max_length
);
1602 netdev_tx_t
ieee80211_monitor_start_xmit(struct sk_buff
*skb
,
1603 struct net_device
*dev
)
1605 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1606 struct ieee80211_chanctx_conf
*chanctx_conf
;
1607 struct ieee80211_channel
*chan
;
1608 struct ieee80211_radiotap_header
*prthdr
=
1609 (struct ieee80211_radiotap_header
*)skb
->data
;
1610 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1611 struct ieee80211_hdr
*hdr
;
1612 struct ieee80211_sub_if_data
*tmp_sdata
, *sdata
;
1616 /* check for not even having the fixed radiotap header part */
1617 if (unlikely(skb
->len
< sizeof(struct ieee80211_radiotap_header
)))
1618 goto fail
; /* too short to be possibly valid */
1620 /* is it a header version we can trust to find length from? */
1621 if (unlikely(prthdr
->it_version
))
1622 goto fail
; /* only version 0 is supported */
1624 /* then there must be a radiotap header with a length we can use */
1625 len_rthdr
= ieee80211_get_radiotap_len(skb
->data
);
1627 /* does the skb contain enough to deliver on the alleged length? */
1628 if (unlikely(skb
->len
< len_rthdr
))
1629 goto fail
; /* skb too short for claimed rt header extent */
1632 * fix up the pointers accounting for the radiotap
1633 * header still being in there. We are being given
1634 * a precooked IEEE80211 header so no need for
1637 skb_set_mac_header(skb
, len_rthdr
);
1639 * these are just fixed to the end of the rt area since we
1640 * don't have any better information and at this point, nobody cares
1642 skb_set_network_header(skb
, len_rthdr
);
1643 skb_set_transport_header(skb
, len_rthdr
);
1645 if (skb
->len
< len_rthdr
+ 2)
1648 hdr
= (struct ieee80211_hdr
*)(skb
->data
+ len_rthdr
);
1649 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1651 if (skb
->len
< len_rthdr
+ hdrlen
)
1655 * Initialize skb->protocol if the injected frame is a data frame
1656 * carrying a rfc1042 header
1658 if (ieee80211_is_data(hdr
->frame_control
) &&
1659 skb
->len
>= len_rthdr
+ hdrlen
+ sizeof(rfc1042_header
) + 2) {
1660 u8
*payload
= (u8
*)hdr
+ hdrlen
;
1662 if (ether_addr_equal(payload
, rfc1042_header
))
1663 skb
->protocol
= cpu_to_be16((payload
[6] << 8) |
1667 memset(info
, 0, sizeof(*info
));
1669 info
->flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1670 IEEE80211_TX_CTL_INJECTED
;
1672 /* process and remove the injection radiotap header */
1673 if (!ieee80211_parse_tx_radiotap(skb
))
1679 * We process outgoing injected frames that have a local address
1680 * we handle as though they are non-injected frames.
1681 * This code here isn't entirely correct, the local MAC address
1682 * isn't always enough to find the interface to use; for proper
1683 * VLAN/WDS support we will need a different mechanism (which
1684 * likely isn't going to be monitor interfaces).
1686 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1688 list_for_each_entry_rcu(tmp_sdata
, &local
->interfaces
, list
) {
1689 if (!ieee80211_sdata_running(tmp_sdata
))
1691 if (tmp_sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1692 tmp_sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1693 tmp_sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
1695 if (ether_addr_equal(tmp_sdata
->vif
.addr
, hdr
->addr2
)) {
1701 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1702 if (!chanctx_conf
) {
1703 tmp_sdata
= rcu_dereference(local
->monitor_sdata
);
1706 rcu_dereference(tmp_sdata
->vif
.chanctx_conf
);
1710 chan
= chanctx_conf
->def
.chan
;
1711 else if (!local
->use_chanctx
)
1712 chan
= local
->_oper_chandef
.chan
;
1717 * Frame injection is not allowed if beaconing is not allowed
1718 * or if we need radar detection. Beaconing is usually not allowed when
1719 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1720 * Passive scan is also used in world regulatory domains where
1721 * your country is not known and as such it should be treated as
1722 * NO TX unless the channel is explicitly allowed in which case
1723 * your current regulatory domain would not have the passive scan
1726 * Since AP mode uses monitor interfaces to inject/TX management
1727 * frames we can make AP mode the exception to this rule once it
1728 * supports radar detection as its implementation can deal with
1729 * radar detection by itself. We can do that later by adding a
1730 * monitor flag interfaces used for AP support.
1732 if ((chan
->flags
& (IEEE80211_CHAN_NO_IR
| IEEE80211_CHAN_RADAR
)))
1735 ieee80211_xmit(sdata
, skb
, chan
->band
);
1738 return NETDEV_TX_OK
;
1744 return NETDEV_TX_OK
; /* meaning, we dealt with the skb */
1748 * Measure Tx frame arrival time for Tx latency statistics calculation
1749 * A single Tx frame latency should be measured from when it is entering the
1750 * Kernel until we receive Tx complete confirmation indication and the skb is
1753 static void ieee80211_tx_latency_start_msrmnt(struct ieee80211_local
*local
,
1754 struct sk_buff
*skb
)
1756 struct timespec skb_arv
;
1757 struct ieee80211_tx_latency_bin_ranges
*tx_latency
;
1759 tx_latency
= rcu_dereference(local
->tx_latency
);
1763 ktime_get_ts(&skb_arv
);
1764 skb
->tstamp
= ktime_set(skb_arv
.tv_sec
, skb_arv
.tv_nsec
);
1768 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1769 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1770 * @skb: packet to be sent
1771 * @dev: incoming interface
1773 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1774 * not be freed, and caller is responsible for either retrying later or freeing
1777 * This function takes in an Ethernet header and encapsulates it with suitable
1778 * IEEE 802.11 header based on which interface the packet is coming in. The
1779 * encapsulated packet will then be passed to master interface, wlan#.11, for
1780 * transmission (through low-level driver).
1782 netdev_tx_t
ieee80211_subif_start_xmit(struct sk_buff
*skb
,
1783 struct net_device
*dev
)
1785 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1786 struct ieee80211_local
*local
= sdata
->local
;
1787 struct ieee80211_tx_info
*info
;
1789 u16 ethertype
, hdrlen
, meshhdrlen
= 0;
1791 struct ieee80211_hdr hdr
;
1792 struct ieee80211s_hdr mesh_hdr __maybe_unused
;
1793 struct mesh_path __maybe_unused
*mppath
= NULL
, *mpath
= NULL
;
1794 const u8
*encaps_data
;
1795 int encaps_len
, skip_header_bytes
;
1797 struct sta_info
*sta
= NULL
;
1798 bool wme_sta
= false, authorized
= false, tdls_auth
= false;
1799 bool tdls_direct
= false;
1803 struct ieee80211_chanctx_conf
*chanctx_conf
;
1804 struct ieee80211_sub_if_data
*ap_sdata
;
1805 enum ieee80211_band band
;
1807 if (unlikely(skb
->len
< ETH_HLEN
))
1810 /* convert Ethernet header to proper 802.11 header (based on
1811 * operation mode) */
1812 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
1813 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
);
1817 /* Measure frame arrival for Tx latency statistics calculation */
1818 ieee80211_tx_latency_start_msrmnt(local
, skb
);
1820 switch (sdata
->vif
.type
) {
1821 case NL80211_IFTYPE_AP_VLAN
:
1822 sta
= rcu_dereference(sdata
->u
.vlan
.sta
);
1824 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1826 memcpy(hdr
.addr1
, sta
->sta
.addr
, ETH_ALEN
);
1827 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1828 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1829 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1831 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1832 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1834 ap_sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1836 chanctx_conf
= rcu_dereference(ap_sdata
->vif
.chanctx_conf
);
1839 band
= chanctx_conf
->def
.chan
->band
;
1843 case NL80211_IFTYPE_AP
:
1844 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1845 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1848 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
1850 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1851 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1852 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1854 band
= chanctx_conf
->def
.chan
->band
;
1856 case NL80211_IFTYPE_WDS
:
1857 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
1859 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
1860 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1861 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1862 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1865 * This is the exception! WDS style interfaces are prohibited
1866 * when channel contexts are in used so this must be valid
1868 band
= local
->hw
.conf
.chandef
.chan
->band
;
1870 #ifdef CONFIG_MAC80211_MESH
1871 case NL80211_IFTYPE_MESH_POINT
:
1872 if (!is_multicast_ether_addr(skb
->data
)) {
1873 struct sta_info
*next_hop
;
1874 bool mpp_lookup
= true;
1876 mpath
= mesh_path_lookup(sdata
, skb
->data
);
1879 next_hop
= rcu_dereference(mpath
->next_hop
);
1881 !(mpath
->flags
& (MESH_PATH_ACTIVE
|
1882 MESH_PATH_RESOLVING
)))
1887 mppath
= mpp_path_lookup(sdata
, skb
->data
);
1889 if (mppath
&& mpath
)
1890 mesh_path_del(mpath
->sdata
, mpath
->dst
);
1894 * Use address extension if it is a packet from
1895 * another interface or if we know the destination
1896 * is being proxied by a portal (i.e. portal address
1897 * differs from proxied address)
1899 if (ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
) &&
1900 !(mppath
&& !ether_addr_equal(mppath
->mpp
, skb
->data
))) {
1901 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1902 skb
->data
, skb
->data
+ ETH_ALEN
);
1903 meshhdrlen
= ieee80211_new_mesh_header(sdata
, &mesh_hdr
,
1906 /* DS -> MBSS (802.11-2012 13.11.3.3).
1907 * For unicast with unknown forwarding information,
1908 * destination might be in the MBSS or if that fails
1909 * forwarded to another mesh gate. In either case
1910 * resolution will be handled in ieee80211_xmit(), so
1911 * leave the original DA. This also works for mcast */
1912 const u8
*mesh_da
= skb
->data
;
1915 mesh_da
= mppath
->mpp
;
1917 mesh_da
= mpath
->dst
;
1919 hdrlen
= ieee80211_fill_mesh_addresses(&hdr
, &fc
,
1920 mesh_da
, sdata
->vif
.addr
);
1921 if (is_multicast_ether_addr(mesh_da
))
1922 /* DA TA mSA AE:SA */
1923 meshhdrlen
= ieee80211_new_mesh_header(
1925 skb
->data
+ ETH_ALEN
, NULL
);
1927 /* RA TA mDA mSA AE:DA SA */
1928 meshhdrlen
= ieee80211_new_mesh_header(
1929 sdata
, &mesh_hdr
, skb
->data
,
1930 skb
->data
+ ETH_ALEN
);
1933 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1936 band
= chanctx_conf
->def
.chan
->band
;
1939 case NL80211_IFTYPE_STATION
:
1940 if (sdata
->wdev
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
) {
1941 bool tdls_peer
= false;
1943 sta
= sta_info_get(sdata
, skb
->data
);
1945 authorized
= test_sta_flag(sta
,
1946 WLAN_STA_AUTHORIZED
);
1947 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
1948 tdls_peer
= test_sta_flag(sta
,
1949 WLAN_STA_TDLS_PEER
);
1950 tdls_auth
= test_sta_flag(sta
,
1951 WLAN_STA_TDLS_PEER_AUTH
);
1955 * If the TDLS link is enabled, send everything
1956 * directly. Otherwise, allow TDLS setup frames
1957 * to be transmitted indirectly.
1959 tdls_direct
= tdls_peer
&& (tdls_auth
||
1960 !(ethertype
== ETH_P_TDLS
&& skb
->len
> 14 &&
1961 skb
->data
[14] == WLAN_TDLS_SNAP_RFTYPE
));
1965 /* link during setup - throw out frames to peer */
1970 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1971 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1972 memcpy(hdr
.addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1974 } else if (sdata
->u
.mgd
.use_4addr
&&
1975 cpu_to_be16(ethertype
) != sdata
->control_port_protocol
) {
1976 fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
1977 IEEE80211_FCTL_TODS
);
1979 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1980 memcpy(hdr
.addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1981 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1982 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1985 fc
|= cpu_to_le16(IEEE80211_FCTL_TODS
);
1987 memcpy(hdr
.addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
1988 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1989 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1992 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1995 band
= chanctx_conf
->def
.chan
->band
;
1997 case NL80211_IFTYPE_ADHOC
:
1999 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
2000 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
2001 memcpy(hdr
.addr3
, sdata
->u
.ibss
.bssid
, ETH_ALEN
);
2003 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2006 band
= chanctx_conf
->def
.chan
->band
;
2013 * There's no need to try to look up the destination
2014 * if it is a multicast address (which can only happen
2017 multicast
= is_multicast_ether_addr(hdr
.addr1
);
2019 sta
= sta_info_get(sdata
, hdr
.addr1
);
2021 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
2022 wme_sta
= test_sta_flag(sta
, WLAN_STA_WME
);
2026 /* For mesh, the use of the QoS header is mandatory */
2027 if (ieee80211_vif_is_mesh(&sdata
->vif
))
2030 /* receiver and we are QoS enabled, use a QoS type frame */
2031 if (wme_sta
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
) {
2032 fc
|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
2037 * Drop unicast frames to unauthorised stations unless they are
2038 * EAPOL frames from the local station.
2040 if (unlikely(!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2041 !multicast
&& !authorized
&&
2042 (cpu_to_be16(ethertype
) != sdata
->control_port_protocol
||
2043 !ether_addr_equal(sdata
->vif
.addr
, skb
->data
+ ETH_ALEN
)))) {
2044 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2045 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2046 dev
->name
, hdr
.addr1
);
2049 I802_DEBUG_INC(local
->tx_handlers_drop_unauth_port
);
2054 if (unlikely(!multicast
&& skb
->sk
&&
2055 skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)) {
2056 struct sk_buff
*orig_skb
= skb
;
2058 skb
= skb_clone(skb
, GFP_ATOMIC
);
2060 unsigned long flags
;
2063 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
2064 id
= idr_alloc(&local
->ack_status_frames
, orig_skb
,
2065 1, 0x10000, GFP_ATOMIC
);
2066 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
2070 info_flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
2071 } else if (skb_shared(skb
)) {
2072 kfree_skb(orig_skb
);
2078 /* couldn't clone -- lose tx status ... */
2084 * If the skb is shared we need to obtain our own copy.
2086 if (skb_shared(skb
)) {
2087 struct sk_buff
*tmp_skb
= skb
;
2089 /* can't happen -- skb is a clone if info_id != 0 */
2092 skb
= skb_clone(skb
, GFP_ATOMIC
);
2099 hdr
.frame_control
= fc
;
2100 hdr
.duration_id
= 0;
2103 skip_header_bytes
= ETH_HLEN
;
2104 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
2105 encaps_data
= bridge_tunnel_header
;
2106 encaps_len
= sizeof(bridge_tunnel_header
);
2107 skip_header_bytes
-= 2;
2108 } else if (ethertype
>= ETH_P_802_3_MIN
) {
2109 encaps_data
= rfc1042_header
;
2110 encaps_len
= sizeof(rfc1042_header
);
2111 skip_header_bytes
-= 2;
2117 nh_pos
= skb_network_header(skb
) - skb
->data
;
2118 h_pos
= skb_transport_header(skb
) - skb
->data
;
2120 skb_pull(skb
, skip_header_bytes
);
2121 nh_pos
-= skip_header_bytes
;
2122 h_pos
-= skip_header_bytes
;
2124 head_need
= hdrlen
+ encaps_len
+ meshhdrlen
- skb_headroom(skb
);
2127 * So we need to modify the skb header and hence need a copy of
2128 * that. The head_need variable above doesn't, so far, include
2129 * the needed header space that we don't need right away. If we
2130 * can, then we don't reallocate right now but only after the
2131 * frame arrives at the master device (if it does...)
2133 * If we cannot, however, then we will reallocate to include all
2134 * the ever needed space. Also, if we need to reallocate it anyway,
2135 * make it big enough for everything we may ever need.
2138 if (head_need
> 0 || skb_cloned(skb
)) {
2139 head_need
+= sdata
->encrypt_headroom
;
2140 head_need
+= local
->tx_headroom
;
2141 head_need
= max_t(int, 0, head_need
);
2142 if (ieee80211_skb_resize(sdata
, skb
, head_need
, true)) {
2143 ieee80211_free_txskb(&local
->hw
, skb
);
2150 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
2151 nh_pos
+= encaps_len
;
2152 h_pos
+= encaps_len
;
2155 #ifdef CONFIG_MAC80211_MESH
2156 if (meshhdrlen
> 0) {
2157 memcpy(skb_push(skb
, meshhdrlen
), &mesh_hdr
, meshhdrlen
);
2158 nh_pos
+= meshhdrlen
;
2159 h_pos
+= meshhdrlen
;
2163 if (ieee80211_is_data_qos(fc
)) {
2164 __le16
*qos_control
;
2166 qos_control
= (__le16
*) skb_push(skb
, 2);
2167 memcpy(skb_push(skb
, hdrlen
- 2), &hdr
, hdrlen
- 2);
2169 * Maybe we could actually set some fields here, for now just
2170 * initialise to zero to indicate no special operation.
2174 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
2179 dev
->stats
.tx_packets
++;
2180 dev
->stats
.tx_bytes
+= skb
->len
;
2182 /* Update skb pointers to various headers since this modified frame
2183 * is going to go through Linux networking code that may potentially
2184 * need things like pointer to IP header. */
2185 skb_set_mac_header(skb
, 0);
2186 skb_set_network_header(skb
, nh_pos
);
2187 skb_set_transport_header(skb
, h_pos
);
2189 info
= IEEE80211_SKB_CB(skb
);
2190 memset(info
, 0, sizeof(*info
));
2192 dev
->trans_start
= jiffies
;
2194 info
->flags
= info_flags
;
2195 info
->ack_frame_id
= info_id
;
2197 ieee80211_xmit(sdata
, skb
, band
);
2200 return NETDEV_TX_OK
;
2206 return NETDEV_TX_OK
;
2211 * ieee80211_clear_tx_pending may not be called in a context where
2212 * it is possible that it packets could come in again.
2214 void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
2216 struct sk_buff
*skb
;
2219 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2220 while ((skb
= skb_dequeue(&local
->pending
[i
])) != NULL
)
2221 ieee80211_free_txskb(&local
->hw
, skb
);
2226 * Returns false if the frame couldn't be transmitted but was queued instead,
2227 * which in this case means re-queued -- take as an indication to stop sending
2228 * more pending frames.
2230 static bool ieee80211_tx_pending_skb(struct ieee80211_local
*local
,
2231 struct sk_buff
*skb
)
2233 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2234 struct ieee80211_sub_if_data
*sdata
;
2235 struct sta_info
*sta
;
2236 struct ieee80211_hdr
*hdr
;
2238 struct ieee80211_chanctx_conf
*chanctx_conf
;
2240 sdata
= vif_to_sdata(info
->control
.vif
);
2242 if (info
->flags
& IEEE80211_TX_INTFL_NEED_TXPROCESSING
) {
2243 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2244 if (unlikely(!chanctx_conf
)) {
2248 result
= ieee80211_tx(sdata
, skb
, true,
2249 chanctx_conf
->def
.chan
->band
);
2251 struct sk_buff_head skbs
;
2253 __skb_queue_head_init(&skbs
);
2254 __skb_queue_tail(&skbs
, skb
);
2256 hdr
= (struct ieee80211_hdr
*)skb
->data
;
2257 sta
= sta_info_get(sdata
, hdr
->addr1
);
2259 result
= __ieee80211_tx(local
, &skbs
, skb
->len
, sta
, true);
2266 * Transmit all pending packets. Called from tasklet.
2268 void ieee80211_tx_pending(unsigned long data
)
2270 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
2271 unsigned long flags
;
2277 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
2278 for (i
= 0; i
< local
->hw
.queues
; i
++) {
2280 * If queue is stopped by something other than due to pending
2281 * frames, or we have no pending frames, proceed to next queue.
2283 if (local
->queue_stop_reasons
[i
] ||
2284 skb_queue_empty(&local
->pending
[i
]))
2287 while (!skb_queue_empty(&local
->pending
[i
])) {
2288 struct sk_buff
*skb
= __skb_dequeue(&local
->pending
[i
]);
2289 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2291 if (WARN_ON(!info
->control
.vif
)) {
2292 ieee80211_free_txskb(&local
->hw
, skb
);
2296 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
2299 txok
= ieee80211_tx_pending_skb(local
, skb
);
2300 spin_lock_irqsave(&local
->queue_stop_reason_lock
,
2306 if (skb_queue_empty(&local
->pending
[i
]))
2307 ieee80211_propagate_queue_wake(local
, i
);
2309 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
2314 /* functions for drivers to get certain frames */
2316 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2317 struct ps_data
*ps
, struct sk_buff
*skb
)
2321 int i
, have_bits
= 0, n1
, n2
;
2323 /* Generate bitmap for TIM only if there are any STAs in power save
2325 if (atomic_read(&ps
->num_sta_ps
) > 0)
2326 /* in the hope that this is faster than
2327 * checking byte-for-byte */
2328 have_bits
= !bitmap_empty((unsigned long *)ps
->tim
,
2329 IEEE80211_MAX_AID
+1);
2331 if (ps
->dtim_count
== 0)
2332 ps
->dtim_count
= sdata
->vif
.bss_conf
.dtim_period
- 1;
2336 tim
= pos
= (u8
*) skb_put(skb
, 6);
2337 *pos
++ = WLAN_EID_TIM
;
2339 *pos
++ = ps
->dtim_count
;
2340 *pos
++ = sdata
->vif
.bss_conf
.dtim_period
;
2342 if (ps
->dtim_count
== 0 && !skb_queue_empty(&ps
->bc_buf
))
2345 ps
->dtim_bc_mc
= aid0
== 1;
2348 /* Find largest even number N1 so that bits numbered 1 through
2349 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2350 * (N2 + 1) x 8 through 2007 are 0. */
2352 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
2359 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
2366 /* Bitmap control */
2368 /* Part Virt Bitmap */
2369 skb_put(skb
, n2
- n1
);
2370 memcpy(pos
, ps
->tim
+ n1
, n2
- n1
+ 1);
2372 tim
[1] = n2
- n1
+ 4;
2374 *pos
++ = aid0
; /* Bitmap control */
2375 *pos
++ = 0; /* Part Virt Bitmap */
2379 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data
*sdata
,
2380 struct ps_data
*ps
, struct sk_buff
*skb
)
2382 struct ieee80211_local
*local
= sdata
->local
;
2385 * Not very nice, but we want to allow the driver to call
2386 * ieee80211_beacon_get() as a response to the set_tim()
2387 * callback. That, however, is already invoked under the
2388 * sta_lock to guarantee consistent and race-free update
2389 * of the tim bitmap in mac80211 and the driver.
2391 if (local
->tim_in_locked_section
) {
2392 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2394 spin_lock_bh(&local
->tim_lock
);
2395 __ieee80211_beacon_add_tim(sdata
, ps
, skb
);
2396 spin_unlock_bh(&local
->tim_lock
);
2402 void ieee80211_csa_finish(struct ieee80211_vif
*vif
)
2404 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2406 ieee80211_queue_work(&sdata
->local
->hw
,
2407 &sdata
->csa_finalize_work
);
2409 EXPORT_SYMBOL(ieee80211_csa_finish
);
2411 static void ieee80211_update_csa(struct ieee80211_sub_if_data
*sdata
,
2412 struct beacon_data
*beacon
)
2414 struct probe_resp
*resp
;
2415 int counter_offset_beacon
= sdata
->csa_counter_offset_beacon
;
2416 int counter_offset_presp
= sdata
->csa_counter_offset_presp
;
2418 size_t beacon_data_len
;
2420 switch (sdata
->vif
.type
) {
2421 case NL80211_IFTYPE_AP
:
2422 beacon_data
= beacon
->tail
;
2423 beacon_data_len
= beacon
->tail_len
;
2425 case NL80211_IFTYPE_ADHOC
:
2426 beacon_data
= beacon
->head
;
2427 beacon_data_len
= beacon
->head_len
;
2429 case NL80211_IFTYPE_MESH_POINT
:
2430 beacon_data
= beacon
->head
;
2431 beacon_data_len
= beacon
->head_len
;
2436 if (WARN_ON(counter_offset_beacon
>= beacon_data_len
))
2439 /* warn if the driver did not check for/react to csa completeness */
2440 if (WARN_ON(beacon_data
[counter_offset_beacon
] == 0))
2443 beacon_data
[counter_offset_beacon
]--;
2445 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
&& counter_offset_presp
) {
2447 resp
= rcu_dereference(sdata
->u
.ap
.probe_resp
);
2449 /* if nl80211 accepted the offset, this should not happen. */
2450 if (WARN_ON(!resp
)) {
2454 resp
->data
[counter_offset_presp
]--;
2459 bool ieee80211_csa_is_complete(struct ieee80211_vif
*vif
)
2461 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2462 struct beacon_data
*beacon
= NULL
;
2464 size_t beacon_data_len
;
2465 int counter_beacon
= sdata
->csa_counter_offset_beacon
;
2468 if (!ieee80211_sdata_running(sdata
))
2472 if (vif
->type
== NL80211_IFTYPE_AP
) {
2473 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2475 beacon
= rcu_dereference(ap
->beacon
);
2476 if (WARN_ON(!beacon
|| !beacon
->tail
))
2478 beacon_data
= beacon
->tail
;
2479 beacon_data_len
= beacon
->tail_len
;
2480 } else if (vif
->type
== NL80211_IFTYPE_ADHOC
) {
2481 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2483 beacon
= rcu_dereference(ifibss
->presp
);
2487 beacon_data
= beacon
->head
;
2488 beacon_data_len
= beacon
->head_len
;
2489 } else if (vif
->type
== NL80211_IFTYPE_MESH_POINT
) {
2490 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2492 beacon
= rcu_dereference(ifmsh
->beacon
);
2496 beacon_data
= beacon
->head
;
2497 beacon_data_len
= beacon
->head_len
;
2503 if (WARN_ON(counter_beacon
> beacon_data_len
))
2506 if (beacon_data
[counter_beacon
] == 0)
2513 EXPORT_SYMBOL(ieee80211_csa_is_complete
);
2515 struct sk_buff
*ieee80211_beacon_get_tim(struct ieee80211_hw
*hw
,
2516 struct ieee80211_vif
*vif
,
2517 u16
*tim_offset
, u16
*tim_length
)
2519 struct ieee80211_local
*local
= hw_to_local(hw
);
2520 struct sk_buff
*skb
= NULL
;
2521 struct ieee80211_tx_info
*info
;
2522 struct ieee80211_sub_if_data
*sdata
= NULL
;
2523 enum ieee80211_band band
;
2524 struct ieee80211_tx_rate_control txrc
;
2525 struct ieee80211_chanctx_conf
*chanctx_conf
;
2529 sdata
= vif_to_sdata(vif
);
2530 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2532 if (!ieee80211_sdata_running(sdata
) || !chanctx_conf
)
2540 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2541 struct ieee80211_if_ap
*ap
= &sdata
->u
.ap
;
2542 struct beacon_data
*beacon
= rcu_dereference(ap
->beacon
);
2545 if (sdata
->vif
.csa_active
)
2546 ieee80211_update_csa(sdata
, beacon
);
2549 * headroom, head length,
2550 * tail length and maximum TIM length
2552 skb
= dev_alloc_skb(local
->tx_headroom
+
2554 beacon
->tail_len
+ 256 +
2555 local
->hw
.extra_beacon_tailroom
);
2559 skb_reserve(skb
, local
->tx_headroom
);
2560 memcpy(skb_put(skb
, beacon
->head_len
), beacon
->head
,
2563 ieee80211_beacon_add_tim(sdata
, &ap
->ps
, skb
);
2566 *tim_offset
= beacon
->head_len
;
2568 *tim_length
= skb
->len
- beacon
->head_len
;
2571 memcpy(skb_put(skb
, beacon
->tail_len
),
2572 beacon
->tail
, beacon
->tail_len
);
2575 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2576 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2577 struct ieee80211_hdr
*hdr
;
2578 struct beacon_data
*presp
= rcu_dereference(ifibss
->presp
);
2583 if (sdata
->vif
.csa_active
)
2584 ieee80211_update_csa(sdata
, presp
);
2587 skb
= dev_alloc_skb(local
->tx_headroom
+ presp
->head_len
+
2588 local
->hw
.extra_beacon_tailroom
);
2591 skb_reserve(skb
, local
->tx_headroom
);
2592 memcpy(skb_put(skb
, presp
->head_len
), presp
->head
,
2595 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2596 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2597 IEEE80211_STYPE_BEACON
);
2598 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2599 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2600 struct beacon_data
*bcn
= rcu_dereference(ifmsh
->beacon
);
2605 if (sdata
->vif
.csa_active
)
2606 ieee80211_update_csa(sdata
, bcn
);
2608 if (ifmsh
->sync_ops
)
2609 ifmsh
->sync_ops
->adjust_tbtt(sdata
, bcn
);
2611 skb
= dev_alloc_skb(local
->tx_headroom
+
2615 local
->hw
.extra_beacon_tailroom
);
2618 skb_reserve(skb
, local
->tx_headroom
);
2619 memcpy(skb_put(skb
, bcn
->head_len
), bcn
->head
, bcn
->head_len
);
2620 ieee80211_beacon_add_tim(sdata
, &ifmsh
->ps
, skb
);
2621 memcpy(skb_put(skb
, bcn
->tail_len
), bcn
->tail
, bcn
->tail_len
);
2627 band
= chanctx_conf
->def
.chan
->band
;
2629 info
= IEEE80211_SKB_CB(skb
);
2631 info
->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
2632 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
2635 memset(&txrc
, 0, sizeof(txrc
));
2637 txrc
.sband
= local
->hw
.wiphy
->bands
[band
];
2638 txrc
.bss_conf
= &sdata
->vif
.bss_conf
;
2640 txrc
.reported_rate
.idx
= -1;
2641 txrc
.rate_idx_mask
= sdata
->rc_rateidx_mask
[band
];
2642 if (txrc
.rate_idx_mask
== (1 << txrc
.sband
->n_bitrates
) - 1)
2643 txrc
.max_rate_idx
= -1;
2645 txrc
.max_rate_idx
= fls(txrc
.rate_idx_mask
) - 1;
2647 rate_control_get_rate(sdata
, NULL
, &txrc
);
2649 info
->control
.vif
= vif
;
2651 info
->flags
|= IEEE80211_TX_CTL_CLEAR_PS_FILT
|
2652 IEEE80211_TX_CTL_ASSIGN_SEQ
|
2653 IEEE80211_TX_CTL_FIRST_FRAGMENT
;
2658 EXPORT_SYMBOL(ieee80211_beacon_get_tim
);
2660 struct sk_buff
*ieee80211_proberesp_get(struct ieee80211_hw
*hw
,
2661 struct ieee80211_vif
*vif
)
2663 struct ieee80211_if_ap
*ap
= NULL
;
2664 struct sk_buff
*skb
= NULL
;
2665 struct probe_resp
*presp
= NULL
;
2666 struct ieee80211_hdr
*hdr
;
2667 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2669 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
2675 presp
= rcu_dereference(ap
->probe_resp
);
2679 skb
= dev_alloc_skb(presp
->len
);
2683 memcpy(skb_put(skb
, presp
->len
), presp
->data
, presp
->len
);
2685 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2686 memset(hdr
->addr1
, 0, sizeof(hdr
->addr1
));
2692 EXPORT_SYMBOL(ieee80211_proberesp_get
);
2694 struct sk_buff
*ieee80211_pspoll_get(struct ieee80211_hw
*hw
,
2695 struct ieee80211_vif
*vif
)
2697 struct ieee80211_sub_if_data
*sdata
;
2698 struct ieee80211_if_managed
*ifmgd
;
2699 struct ieee80211_pspoll
*pspoll
;
2700 struct ieee80211_local
*local
;
2701 struct sk_buff
*skb
;
2703 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2706 sdata
= vif_to_sdata(vif
);
2707 ifmgd
= &sdata
->u
.mgd
;
2708 local
= sdata
->local
;
2710 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
2714 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2716 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
2717 memset(pspoll
, 0, sizeof(*pspoll
));
2718 pspoll
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
2719 IEEE80211_STYPE_PSPOLL
);
2720 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
2722 /* aid in PS-Poll has its two MSBs each set to 1 */
2723 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
2725 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
2726 memcpy(pspoll
->ta
, vif
->addr
, ETH_ALEN
);
2730 EXPORT_SYMBOL(ieee80211_pspoll_get
);
2732 struct sk_buff
*ieee80211_nullfunc_get(struct ieee80211_hw
*hw
,
2733 struct ieee80211_vif
*vif
)
2735 struct ieee80211_hdr_3addr
*nullfunc
;
2736 struct ieee80211_sub_if_data
*sdata
;
2737 struct ieee80211_if_managed
*ifmgd
;
2738 struct ieee80211_local
*local
;
2739 struct sk_buff
*skb
;
2741 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2744 sdata
= vif_to_sdata(vif
);
2745 ifmgd
= &sdata
->u
.mgd
;
2746 local
= sdata
->local
;
2748 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*nullfunc
));
2752 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2754 nullfunc
= (struct ieee80211_hdr_3addr
*) skb_put(skb
,
2756 memset(nullfunc
, 0, sizeof(*nullfunc
));
2757 nullfunc
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
2758 IEEE80211_STYPE_NULLFUNC
|
2759 IEEE80211_FCTL_TODS
);
2760 memcpy(nullfunc
->addr1
, ifmgd
->bssid
, ETH_ALEN
);
2761 memcpy(nullfunc
->addr2
, vif
->addr
, ETH_ALEN
);
2762 memcpy(nullfunc
->addr3
, ifmgd
->bssid
, ETH_ALEN
);
2766 EXPORT_SYMBOL(ieee80211_nullfunc_get
);
2768 struct sk_buff
*ieee80211_probereq_get(struct ieee80211_hw
*hw
,
2769 struct ieee80211_vif
*vif
,
2770 const u8
*ssid
, size_t ssid_len
,
2773 struct ieee80211_sub_if_data
*sdata
;
2774 struct ieee80211_local
*local
;
2775 struct ieee80211_hdr_3addr
*hdr
;
2776 struct sk_buff
*skb
;
2780 sdata
= vif_to_sdata(vif
);
2781 local
= sdata
->local
;
2782 ie_ssid_len
= 2 + ssid_len
;
2784 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*hdr
) +
2785 ie_ssid_len
+ tailroom
);
2789 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2791 hdr
= (struct ieee80211_hdr_3addr
*) skb_put(skb
, sizeof(*hdr
));
2792 memset(hdr
, 0, sizeof(*hdr
));
2793 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2794 IEEE80211_STYPE_PROBE_REQ
);
2795 eth_broadcast_addr(hdr
->addr1
);
2796 memcpy(hdr
->addr2
, vif
->addr
, ETH_ALEN
);
2797 eth_broadcast_addr(hdr
->addr3
);
2799 pos
= skb_put(skb
, ie_ssid_len
);
2800 *pos
++ = WLAN_EID_SSID
;
2803 memcpy(pos
, ssid
, ssid_len
);
2808 EXPORT_SYMBOL(ieee80211_probereq_get
);
2810 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2811 const void *frame
, size_t frame_len
,
2812 const struct ieee80211_tx_info
*frame_txctl
,
2813 struct ieee80211_rts
*rts
)
2815 const struct ieee80211_hdr
*hdr
= frame
;
2817 rts
->frame_control
=
2818 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
);
2819 rts
->duration
= ieee80211_rts_duration(hw
, vif
, frame_len
,
2821 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
2822 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
2824 EXPORT_SYMBOL(ieee80211_rts_get
);
2826 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2827 const void *frame
, size_t frame_len
,
2828 const struct ieee80211_tx_info
*frame_txctl
,
2829 struct ieee80211_cts
*cts
)
2831 const struct ieee80211_hdr
*hdr
= frame
;
2833 cts
->frame_control
=
2834 cpu_to_le16(IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
);
2835 cts
->duration
= ieee80211_ctstoself_duration(hw
, vif
,
2836 frame_len
, frame_txctl
);
2837 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
2839 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
2842 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
,
2843 struct ieee80211_vif
*vif
)
2845 struct ieee80211_local
*local
= hw_to_local(hw
);
2846 struct sk_buff
*skb
= NULL
;
2847 struct ieee80211_tx_data tx
;
2848 struct ieee80211_sub_if_data
*sdata
;
2850 struct ieee80211_tx_info
*info
;
2851 struct ieee80211_chanctx_conf
*chanctx_conf
;
2853 sdata
= vif_to_sdata(vif
);
2856 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2861 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2862 struct beacon_data
*beacon
=
2863 rcu_dereference(sdata
->u
.ap
.beacon
);
2865 if (!beacon
|| !beacon
->head
)
2868 ps
= &sdata
->u
.ap
.ps
;
2869 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2870 ps
= &sdata
->u
.mesh
.ps
;
2875 if (ps
->dtim_count
!= 0 || !ps
->dtim_bc_mc
)
2876 goto out
; /* send buffered bc/mc only after DTIM beacon */
2879 skb
= skb_dequeue(&ps
->bc_buf
);
2882 local
->total_ps_buffered
--;
2884 if (!skb_queue_empty(&ps
->bc_buf
) && skb
->len
>= 2) {
2885 struct ieee80211_hdr
*hdr
=
2886 (struct ieee80211_hdr
*) skb
->data
;
2887 /* more buffered multicast/broadcast frames ==> set
2888 * MoreData flag in IEEE 802.11 header to inform PS
2890 hdr
->frame_control
|=
2891 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
2894 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
2895 sdata
= IEEE80211_DEV_TO_SUB_IF(skb
->dev
);
2896 if (!ieee80211_tx_prepare(sdata
, &tx
, skb
))
2898 dev_kfree_skb_any(skb
);
2901 info
= IEEE80211_SKB_CB(skb
);
2903 tx
.flags
|= IEEE80211_TX_PS_BUFFERED
;
2904 info
->band
= chanctx_conf
->def
.chan
->band
;
2906 if (invoke_tx_handlers(&tx
))
2913 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
2915 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data
*sdata
,
2916 struct sk_buff
*skb
, int tid
,
2917 enum ieee80211_band band
)
2919 int ac
= ieee802_1d_to_ac
[tid
& 7];
2921 skb_set_mac_header(skb
, 0);
2922 skb_set_network_header(skb
, 0);
2923 skb_set_transport_header(skb
, 0);
2925 skb_set_queue_mapping(skb
, ac
);
2926 skb
->priority
= tid
;
2928 skb
->dev
= sdata
->dev
;
2931 * The other path calling ieee80211_xmit is from the tasklet,
2932 * and while we can handle concurrent transmissions locking
2933 * requirements are that we do not come into tx with bhs on.
2936 ieee80211_xmit(sdata
, skb
, band
);