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 2007-2010 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
8 * Copyright (C) 2018-2019 Intel Corporation
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/jiffies.h>
16 #include <linux/slab.h>
17 #include <linux/kernel.h>
18 #include <linux/skbuff.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/rcupdate.h>
22 #include <linux/export.h>
23 #include <linux/bitops.h>
24 #include <net/mac80211.h>
25 #include <net/ieee80211_radiotap.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
38 static inline void ieee80211_rx_stats(struct net_device
*dev
, u32 len
)
40 struct pcpu_sw_netstats
*tstats
= this_cpu_ptr(dev
->tstats
);
42 u64_stats_update_begin(&tstats
->syncp
);
44 tstats
->rx_bytes
+= len
;
45 u64_stats_update_end(&tstats
->syncp
);
48 static u8
*ieee80211_get_bssid(struct ieee80211_hdr
*hdr
, size_t len
,
49 enum nl80211_iftype type
)
51 __le16 fc
= hdr
->frame_control
;
53 if (ieee80211_is_data(fc
)) {
54 if (len
< 24) /* drop incorrect hdr len (data) */
57 if (ieee80211_has_a4(fc
))
59 if (ieee80211_has_tods(fc
))
61 if (ieee80211_has_fromds(fc
))
67 if (ieee80211_is_mgmt(fc
)) {
68 if (len
< 24) /* drop incorrect hdr len (mgmt) */
73 if (ieee80211_is_ctl(fc
)) {
74 if (ieee80211_is_pspoll(fc
))
77 if (ieee80211_is_back_req(fc
)) {
79 case NL80211_IFTYPE_STATION
:
81 case NL80211_IFTYPE_AP
:
82 case NL80211_IFTYPE_AP_VLAN
:
85 break; /* fall through to the return */
94 * monitor mode reception
96 * This function cleans up the SKB, i.e. it removes all the stuff
97 * only useful for monitoring.
99 static void remove_monitor_info(struct sk_buff
*skb
,
100 unsigned int present_fcs_len
,
101 unsigned int rtap_space
)
104 __pskb_trim(skb
, skb
->len
- present_fcs_len
);
105 __pskb_pull(skb
, rtap_space
);
108 static inline bool should_drop_frame(struct sk_buff
*skb
, int present_fcs_len
,
109 unsigned int rtap_space
)
111 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
112 struct ieee80211_hdr
*hdr
;
114 hdr
= (void *)(skb
->data
+ rtap_space
);
116 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
|
117 RX_FLAG_FAILED_PLCP_CRC
|
118 RX_FLAG_ONLY_MONITOR
|
122 if (unlikely(skb
->len
< 16 + present_fcs_len
+ rtap_space
))
125 if (ieee80211_is_ctl(hdr
->frame_control
) &&
126 !ieee80211_is_pspoll(hdr
->frame_control
) &&
127 !ieee80211_is_back_req(hdr
->frame_control
))
134 ieee80211_rx_radiotap_hdrlen(struct ieee80211_local
*local
,
135 struct ieee80211_rx_status
*status
,
140 /* always present fields */
141 len
= sizeof(struct ieee80211_radiotap_header
) + 8;
143 /* allocate extra bitmaps */
145 len
+= 4 * hweight8(status
->chains
);
146 /* vendor presence bitmap */
147 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
)
150 if (ieee80211_have_rx_timestamp(status
)) {
154 if (ieee80211_hw_check(&local
->hw
, SIGNAL_DBM
))
157 /* antenna field, if we don't have per-chain info */
161 /* padding for RX_FLAGS if necessary */
164 if (status
->encoding
== RX_ENC_HT
) /* HT info */
167 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
172 if (status
->encoding
== RX_ENC_VHT
) {
177 if (local
->hw
.radiotap_timestamp
.units_pos
>= 0) {
182 if (status
->encoding
== RX_ENC_HE
&&
183 status
->flag
& RX_FLAG_RADIOTAP_HE
) {
186 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he
) != 12);
189 if (status
->encoding
== RX_ENC_HE
&&
190 status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
193 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu
) != 12);
196 if (status
->flag
& RX_FLAG_NO_PSDU
)
199 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
202 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig
) != 4);
205 if (status
->chains
) {
206 /* antenna and antenna signal fields */
207 len
+= 2 * hweight8(status
->chains
);
210 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
211 struct ieee80211_vendor_radiotap
*rtap
;
212 int vendor_data_offset
= 0;
215 * The position to look at depends on the existence (or non-
216 * existence) of other elements, so take that into account...
218 if (status
->flag
& RX_FLAG_RADIOTAP_HE
)
219 vendor_data_offset
+=
220 sizeof(struct ieee80211_radiotap_he
);
221 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
)
222 vendor_data_offset
+=
223 sizeof(struct ieee80211_radiotap_he_mu
);
224 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
)
225 vendor_data_offset
+=
226 sizeof(struct ieee80211_radiotap_lsig
);
228 rtap
= (void *)&skb
->data
[vendor_data_offset
];
230 /* alignment for fixed 6-byte vendor data header */
232 /* vendor data header */
234 if (WARN_ON(rtap
->align
== 0))
236 len
= ALIGN(len
, rtap
->align
);
237 len
+= rtap
->len
+ rtap
->pad
;
243 static void ieee80211_handle_mu_mimo_mon(struct ieee80211_sub_if_data
*sdata
,
248 struct ieee80211_hdr_3addr hdr
;
251 } __packed
__aligned(2) action
;
256 BUILD_BUG_ON(sizeof(action
) != IEEE80211_MIN_ACTION_SIZE
+ 1);
258 if (skb
->len
< rtap_space
+ sizeof(action
) +
259 VHT_MUMIMO_GROUPS_DATA_LEN
)
262 if (!is_valid_ether_addr(sdata
->u
.mntr
.mu_follow_addr
))
265 skb_copy_bits(skb
, rtap_space
, &action
, sizeof(action
));
267 if (!ieee80211_is_action(action
.hdr
.frame_control
))
270 if (action
.category
!= WLAN_CATEGORY_VHT
)
273 if (action
.action_code
!= WLAN_VHT_ACTION_GROUPID_MGMT
)
276 if (!ether_addr_equal(action
.hdr
.addr1
, sdata
->u
.mntr
.mu_follow_addr
))
279 skb
= skb_copy(skb
, GFP_ATOMIC
);
283 skb_queue_tail(&sdata
->skb_queue
, skb
);
284 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
288 * ieee80211_add_rx_radiotap_header - add radiotap header
290 * add a radiotap header containing all the fields which the hardware provided.
293 ieee80211_add_rx_radiotap_header(struct ieee80211_local
*local
,
295 struct ieee80211_rate
*rate
,
296 int rtap_len
, bool has_fcs
)
298 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
299 struct ieee80211_radiotap_header
*rthdr
;
304 u16 channel_flags
= 0;
306 unsigned long chains
= status
->chains
;
307 struct ieee80211_vendor_radiotap rtap
= {};
308 struct ieee80211_radiotap_he he
= {};
309 struct ieee80211_radiotap_he_mu he_mu
= {};
310 struct ieee80211_radiotap_lsig lsig
= {};
312 if (status
->flag
& RX_FLAG_RADIOTAP_HE
) {
313 he
= *(struct ieee80211_radiotap_he
*)skb
->data
;
314 skb_pull(skb
, sizeof(he
));
315 WARN_ON_ONCE(status
->encoding
!= RX_ENC_HE
);
318 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
319 he_mu
= *(struct ieee80211_radiotap_he_mu
*)skb
->data
;
320 skb_pull(skb
, sizeof(he_mu
));
323 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
324 lsig
= *(struct ieee80211_radiotap_lsig
*)skb
->data
;
325 skb_pull(skb
, sizeof(lsig
));
328 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
329 rtap
= *(struct ieee80211_vendor_radiotap
*)skb
->data
;
330 /* rtap.len and rtap.pad are undone immediately */
331 skb_pull(skb
, sizeof(rtap
) + rtap
.len
+ rtap
.pad
);
335 if (!(has_fcs
&& ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
)))
338 rthdr
= skb_push(skb
, rtap_len
);
339 memset(rthdr
, 0, rtap_len
- rtap
.len
- rtap
.pad
);
340 it_present
= &rthdr
->it_present
;
342 /* radiotap header, set always present flags */
343 rthdr
->it_len
= cpu_to_le16(rtap_len
);
344 it_present_val
= BIT(IEEE80211_RADIOTAP_FLAGS
) |
345 BIT(IEEE80211_RADIOTAP_CHANNEL
) |
346 BIT(IEEE80211_RADIOTAP_RX_FLAGS
);
349 it_present_val
|= BIT(IEEE80211_RADIOTAP_ANTENNA
);
351 for_each_set_bit(chain
, &chains
, IEEE80211_MAX_CHAINS
) {
353 BIT(IEEE80211_RADIOTAP_EXT
) |
354 BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE
);
355 put_unaligned_le32(it_present_val
, it_present
);
357 it_present_val
= BIT(IEEE80211_RADIOTAP_ANTENNA
) |
358 BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL
);
361 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
362 it_present_val
|= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE
) |
363 BIT(IEEE80211_RADIOTAP_EXT
);
364 put_unaligned_le32(it_present_val
, it_present
);
366 it_present_val
= rtap
.present
;
369 put_unaligned_le32(it_present_val
, it_present
);
371 pos
= (void *)(it_present
+ 1);
373 /* the order of the following fields is important */
375 /* IEEE80211_RADIOTAP_TSFT */
376 if (ieee80211_have_rx_timestamp(status
)) {
378 while ((pos
- (u8
*)rthdr
) & 7)
381 ieee80211_calculate_rx_timestamp(local
, status
,
384 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT
);
388 /* IEEE80211_RADIOTAP_FLAGS */
389 if (has_fcs
&& ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
))
390 *pos
|= IEEE80211_RADIOTAP_F_FCS
;
391 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
| RX_FLAG_FAILED_PLCP_CRC
))
392 *pos
|= IEEE80211_RADIOTAP_F_BADFCS
;
393 if (status
->enc_flags
& RX_ENC_FLAG_SHORTPRE
)
394 *pos
|= IEEE80211_RADIOTAP_F_SHORTPRE
;
397 /* IEEE80211_RADIOTAP_RATE */
398 if (!rate
|| status
->encoding
!= RX_ENC_LEGACY
) {
400 * Without rate information don't add it. If we have,
401 * MCS information is a separate field in radiotap,
402 * added below. The byte here is needed as padding
403 * for the channel though, so initialise it to 0.
408 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE
);
409 if (status
->bw
== RATE_INFO_BW_10
)
411 else if (status
->bw
== RATE_INFO_BW_5
)
413 *pos
= DIV_ROUND_UP(rate
->bitrate
, 5 * (1 << shift
));
417 /* IEEE80211_RADIOTAP_CHANNEL */
418 put_unaligned_le16(status
->freq
, pos
);
420 if (status
->bw
== RATE_INFO_BW_10
)
421 channel_flags
|= IEEE80211_CHAN_HALF
;
422 else if (status
->bw
== RATE_INFO_BW_5
)
423 channel_flags
|= IEEE80211_CHAN_QUARTER
;
425 if (status
->band
== NL80211_BAND_5GHZ
)
426 channel_flags
|= IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_5GHZ
;
427 else if (status
->encoding
!= RX_ENC_LEGACY
)
428 channel_flags
|= IEEE80211_CHAN_DYN
| IEEE80211_CHAN_2GHZ
;
429 else if (rate
&& rate
->flags
& IEEE80211_RATE_ERP_G
)
430 channel_flags
|= IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_2GHZ
;
432 channel_flags
|= IEEE80211_CHAN_CCK
| IEEE80211_CHAN_2GHZ
;
434 channel_flags
|= IEEE80211_CHAN_2GHZ
;
435 put_unaligned_le16(channel_flags
, pos
);
438 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
439 if (ieee80211_hw_check(&local
->hw
, SIGNAL_DBM
) &&
440 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
441 *pos
= status
->signal
;
443 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL
);
447 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
449 if (!status
->chains
) {
450 /* IEEE80211_RADIOTAP_ANTENNA */
451 *pos
= status
->antenna
;
455 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
457 /* IEEE80211_RADIOTAP_RX_FLAGS */
458 /* ensure 2 byte alignment for the 2 byte field as required */
459 if ((pos
- (u8
*)rthdr
) & 1)
461 if (status
->flag
& RX_FLAG_FAILED_PLCP_CRC
)
462 rx_flags
|= IEEE80211_RADIOTAP_F_RX_BADPLCP
;
463 put_unaligned_le16(rx_flags
, pos
);
466 if (status
->encoding
== RX_ENC_HT
) {
469 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS
);
470 *pos
++ = local
->hw
.radiotap_mcs_details
;
472 if (status
->enc_flags
& RX_ENC_FLAG_SHORT_GI
)
473 *pos
|= IEEE80211_RADIOTAP_MCS_SGI
;
474 if (status
->bw
== RATE_INFO_BW_40
)
475 *pos
|= IEEE80211_RADIOTAP_MCS_BW_40
;
476 if (status
->enc_flags
& RX_ENC_FLAG_HT_GF
)
477 *pos
|= IEEE80211_RADIOTAP_MCS_FMT_GF
;
478 if (status
->enc_flags
& RX_ENC_FLAG_LDPC
)
479 *pos
|= IEEE80211_RADIOTAP_MCS_FEC_LDPC
;
480 stbc
= (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
) >> RX_ENC_FLAG_STBC_SHIFT
;
481 *pos
|= stbc
<< IEEE80211_RADIOTAP_MCS_STBC_SHIFT
;
483 *pos
++ = status
->rate_idx
;
486 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
489 /* ensure 4 byte alignment */
490 while ((pos
- (u8
*)rthdr
) & 3)
493 cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS
);
494 put_unaligned_le32(status
->ampdu_reference
, pos
);
496 if (status
->flag
& RX_FLAG_AMPDU_LAST_KNOWN
)
497 flags
|= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN
;
498 if (status
->flag
& RX_FLAG_AMPDU_IS_LAST
)
499 flags
|= IEEE80211_RADIOTAP_AMPDU_IS_LAST
;
500 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_ERROR
)
501 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR
;
502 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
503 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN
;
504 if (status
->flag
& RX_FLAG_AMPDU_EOF_BIT_KNOWN
)
505 flags
|= IEEE80211_RADIOTAP_AMPDU_EOF_KNOWN
;
506 if (status
->flag
& RX_FLAG_AMPDU_EOF_BIT
)
507 flags
|= IEEE80211_RADIOTAP_AMPDU_EOF
;
508 put_unaligned_le16(flags
, pos
);
510 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
511 *pos
++ = status
->ampdu_delimiter_crc
;
517 if (status
->encoding
== RX_ENC_VHT
) {
518 u16 known
= local
->hw
.radiotap_vht_details
;
520 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT
);
521 put_unaligned_le16(known
, pos
);
524 if (status
->enc_flags
& RX_ENC_FLAG_SHORT_GI
)
525 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_SGI
;
526 /* in VHT, STBC is binary */
527 if (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
)
528 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_STBC
;
529 if (status
->enc_flags
& RX_ENC_FLAG_BF
)
530 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED
;
533 switch (status
->bw
) {
534 case RATE_INFO_BW_80
:
537 case RATE_INFO_BW_160
:
540 case RATE_INFO_BW_40
:
547 *pos
= (status
->rate_idx
<< 4) | status
->nss
;
550 if (status
->enc_flags
& RX_ENC_FLAG_LDPC
)
551 *pos
|= IEEE80211_RADIOTAP_CODING_LDPC_USER0
;
559 if (local
->hw
.radiotap_timestamp
.units_pos
>= 0) {
561 u8 flags
= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT
;
564 cpu_to_le32(1 << IEEE80211_RADIOTAP_TIMESTAMP
);
566 /* ensure 8 byte alignment */
567 while ((pos
- (u8
*)rthdr
) & 7)
570 put_unaligned_le64(status
->device_timestamp
, pos
);
573 if (local
->hw
.radiotap_timestamp
.accuracy
>= 0) {
574 accuracy
= local
->hw
.radiotap_timestamp
.accuracy
;
575 flags
|= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY
;
577 put_unaligned_le16(accuracy
, pos
);
580 *pos
++ = local
->hw
.radiotap_timestamp
.units_pos
;
584 if (status
->encoding
== RX_ENC_HE
&&
585 status
->flag
& RX_FLAG_RADIOTAP_HE
) {
586 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
588 if (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
) {
589 he
.data6
|= HE_PREP(DATA6_NSTS
,
590 FIELD_GET(RX_ENC_FLAG_STBC_MASK
,
592 he
.data3
|= HE_PREP(DATA3_STBC
, 1);
594 he
.data6
|= HE_PREP(DATA6_NSTS
, status
->nss
);
597 #define CHECK_GI(s) \
598 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
599 (int)NL80211_RATE_INFO_HE_GI_##s)
605 he
.data3
|= HE_PREP(DATA3_DATA_MCS
, status
->rate_idx
);
606 he
.data3
|= HE_PREP(DATA3_DATA_DCM
, status
->he_dcm
);
607 he
.data3
|= HE_PREP(DATA3_CODING
,
608 !!(status
->enc_flags
& RX_ENC_FLAG_LDPC
));
610 he
.data5
|= HE_PREP(DATA5_GI
, status
->he_gi
);
612 switch (status
->bw
) {
613 case RATE_INFO_BW_20
:
614 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
615 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ
);
617 case RATE_INFO_BW_40
:
618 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
619 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ
);
621 case RATE_INFO_BW_80
:
622 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
623 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ
);
625 case RATE_INFO_BW_160
:
626 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
627 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ
);
629 case RATE_INFO_BW_HE_RU
:
630 #define CHECK_RU_ALLOC(s) \
631 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
632 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
640 CHECK_RU_ALLOC(2x996
);
642 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
646 WARN_ONCE(1, "Invalid SU BW %d\n", status
->bw
);
649 /* ensure 2 byte alignment */
650 while ((pos
- (u8
*)rthdr
) & 1)
652 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE
);
653 memcpy(pos
, &he
, sizeof(he
));
657 if (status
->encoding
== RX_ENC_HE
&&
658 status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
659 /* ensure 2 byte alignment */
660 while ((pos
- (u8
*)rthdr
) & 1)
662 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE_MU
);
663 memcpy(pos
, &he_mu
, sizeof(he_mu
));
664 pos
+= sizeof(he_mu
);
667 if (status
->flag
& RX_FLAG_NO_PSDU
) {
669 cpu_to_le32(1 << IEEE80211_RADIOTAP_ZERO_LEN_PSDU
);
670 *pos
++ = status
->zero_length_psdu_type
;
673 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
674 /* ensure 2 byte alignment */
675 while ((pos
- (u8
*)rthdr
) & 1)
677 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_LSIG
);
678 memcpy(pos
, &lsig
, sizeof(lsig
));
682 for_each_set_bit(chain
, &chains
, IEEE80211_MAX_CHAINS
) {
683 *pos
++ = status
->chain_signal
[chain
];
687 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
688 /* ensure 2 byte alignment for the vendor field as required */
689 if ((pos
- (u8
*)rthdr
) & 1)
691 *pos
++ = rtap
.oui
[0];
692 *pos
++ = rtap
.oui
[1];
693 *pos
++ = rtap
.oui
[2];
695 put_unaligned_le16(rtap
.len
, pos
);
697 /* align the actual payload as requested */
698 while ((pos
- (u8
*)rthdr
) & (rtap
.align
- 1))
700 /* data (and possible padding) already follows */
704 static struct sk_buff
*
705 ieee80211_make_monitor_skb(struct ieee80211_local
*local
,
706 struct sk_buff
**origskb
,
707 struct ieee80211_rate
*rate
,
708 int rtap_space
, bool use_origskb
)
710 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(*origskb
);
711 int rt_hdrlen
, needed_headroom
;
714 /* room for the radiotap header based on driver features */
715 rt_hdrlen
= ieee80211_rx_radiotap_hdrlen(local
, status
, *origskb
);
716 needed_headroom
= rt_hdrlen
- rtap_space
;
719 /* only need to expand headroom if necessary */
724 * This shouldn't trigger often because most devices have an
725 * RX header they pull before we get here, and that should
726 * be big enough for our radiotap information. We should
727 * probably export the length to drivers so that we can have
728 * them allocate enough headroom to start with.
730 if (skb_headroom(skb
) < needed_headroom
&&
731 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
)) {
737 * Need to make a copy and possibly remove radiotap header
738 * and FCS from the original.
740 skb
= skb_copy_expand(*origskb
, needed_headroom
, 0, GFP_ATOMIC
);
746 /* prepend radiotap information */
747 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, rt_hdrlen
, true);
749 skb_reset_mac_header(skb
);
750 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
751 skb
->pkt_type
= PACKET_OTHERHOST
;
752 skb
->protocol
= htons(ETH_P_802_2
);
758 * This function copies a received frame to all monitor interfaces and
759 * returns a cleaned-up SKB that no longer includes the FCS nor the
760 * radiotap header the driver might have added.
762 static struct sk_buff
*
763 ieee80211_rx_monitor(struct ieee80211_local
*local
, struct sk_buff
*origskb
,
764 struct ieee80211_rate
*rate
)
766 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(origskb
);
767 struct ieee80211_sub_if_data
*sdata
;
768 struct sk_buff
*monskb
= NULL
;
769 int present_fcs_len
= 0;
770 unsigned int rtap_space
= 0;
771 struct ieee80211_sub_if_data
*monitor_sdata
=
772 rcu_dereference(local
->monitor_sdata
);
773 bool only_monitor
= false;
774 unsigned int min_head_len
;
776 if (status
->flag
& RX_FLAG_RADIOTAP_HE
)
777 rtap_space
+= sizeof(struct ieee80211_radiotap_he
);
779 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
)
780 rtap_space
+= sizeof(struct ieee80211_radiotap_he_mu
);
782 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
)
783 rtap_space
+= sizeof(struct ieee80211_radiotap_lsig
);
785 if (unlikely(status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
)) {
786 struct ieee80211_vendor_radiotap
*rtap
=
787 (void *)(origskb
->data
+ rtap_space
);
789 rtap_space
+= sizeof(*rtap
) + rtap
->len
+ rtap
->pad
;
792 min_head_len
= rtap_space
;
795 * First, we may need to make a copy of the skb because
796 * (1) we need to modify it for radiotap (if not present), and
797 * (2) the other RX handlers will modify the skb we got.
799 * We don't need to, of course, if we aren't going to return
800 * the SKB because it has a bad FCS/PLCP checksum.
803 if (!(status
->flag
& RX_FLAG_NO_PSDU
)) {
804 if (ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
)) {
805 if (unlikely(origskb
->len
<= FCS_LEN
+ rtap_space
)) {
808 dev_kfree_skb(origskb
);
811 present_fcs_len
= FCS_LEN
;
814 /* also consider the hdr->frame_control */
818 /* ensure that the expected data elements are in skb head */
819 if (!pskb_may_pull(origskb
, min_head_len
)) {
820 dev_kfree_skb(origskb
);
824 only_monitor
= should_drop_frame(origskb
, present_fcs_len
, rtap_space
);
826 if (!local
->monitors
|| (status
->flag
& RX_FLAG_SKIP_MONITOR
)) {
828 dev_kfree_skb(origskb
);
832 remove_monitor_info(origskb
, present_fcs_len
, rtap_space
);
836 ieee80211_handle_mu_mimo_mon(monitor_sdata
, origskb
, rtap_space
);
838 list_for_each_entry_rcu(sdata
, &local
->mon_list
, u
.mntr
.list
) {
839 bool last_monitor
= list_is_last(&sdata
->u
.mntr
.list
,
843 monskb
= ieee80211_make_monitor_skb(local
, &origskb
,
855 skb
= skb_clone(monskb
, GFP_ATOMIC
);
859 skb
->dev
= sdata
->dev
;
860 ieee80211_rx_stats(skb
->dev
, skb
->len
);
861 netif_receive_skb(skb
);
869 /* this happens if last_monitor was erroneously false */
870 dev_kfree_skb(monskb
);
876 remove_monitor_info(origskb
, present_fcs_len
, rtap_space
);
880 static void ieee80211_parse_qos(struct ieee80211_rx_data
*rx
)
882 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
883 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
884 int tid
, seqno_idx
, security_idx
;
886 /* does the frame have a qos control field? */
887 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
888 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
889 /* frame has qos control */
890 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
891 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
892 status
->rx_flags
|= IEEE80211_RX_AMSDU
;
898 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
900 * Sequence numbers for management frames, QoS data
901 * frames with a broadcast/multicast address in the
902 * Address 1 field, and all non-QoS data frames sent
903 * by QoS STAs are assigned using an additional single
904 * modulo-4096 counter, [...]
906 * We also use that counter for non-QoS STAs.
908 seqno_idx
= IEEE80211_NUM_TIDS
;
910 if (ieee80211_is_mgmt(hdr
->frame_control
))
911 security_idx
= IEEE80211_NUM_TIDS
;
915 rx
->seqno_idx
= seqno_idx
;
916 rx
->security_idx
= security_idx
;
917 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
918 * For now, set skb->priority to 0 for other cases. */
919 rx
->skb
->priority
= (tid
> 7) ? 0 : tid
;
923 * DOC: Packet alignment
925 * Drivers always need to pass packets that are aligned to two-byte boundaries
928 * Additionally, should, if possible, align the payload data in a way that
929 * guarantees that the contained IP header is aligned to a four-byte
930 * boundary. In the case of regular frames, this simply means aligning the
931 * payload to a four-byte boundary (because either the IP header is directly
932 * contained, or IV/RFC1042 headers that have a length divisible by four are
933 * in front of it). If the payload data is not properly aligned and the
934 * architecture doesn't support efficient unaligned operations, mac80211
935 * will align the data.
937 * With A-MSDU frames, however, the payload data address must yield two modulo
938 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
939 * push the IP header further back to a multiple of four again. Thankfully, the
940 * specs were sane enough this time around to require padding each A-MSDU
941 * subframe to a length that is a multiple of four.
943 * Padding like Atheros hardware adds which is between the 802.11 header and
944 * the payload is not supported, the driver is required to move the 802.11
945 * header to be directly in front of the payload in that case.
947 static void ieee80211_verify_alignment(struct ieee80211_rx_data
*rx
)
949 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
950 WARN_ON_ONCE((unsigned long)rx
->skb
->data
& 1);
957 static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff
*skb
)
959 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
961 if (is_multicast_ether_addr(hdr
->addr1
))
964 return ieee80211_is_robust_mgmt_frame(skb
);
968 static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff
*skb
)
970 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
972 if (!is_multicast_ether_addr(hdr
->addr1
))
975 return ieee80211_is_robust_mgmt_frame(skb
);
979 /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
980 static int ieee80211_get_mmie_keyidx(struct sk_buff
*skb
)
982 struct ieee80211_mgmt
*hdr
= (struct ieee80211_mgmt
*) skb
->data
;
983 struct ieee80211_mmie
*mmie
;
984 struct ieee80211_mmie_16
*mmie16
;
986 if (skb
->len
< 24 + sizeof(*mmie
) || !is_multicast_ether_addr(hdr
->da
))
989 if (!ieee80211_is_robust_mgmt_frame(skb
))
990 return -1; /* not a robust management frame */
992 mmie
= (struct ieee80211_mmie
*)
993 (skb
->data
+ skb
->len
- sizeof(*mmie
));
994 if (mmie
->element_id
== WLAN_EID_MMIE
&&
995 mmie
->length
== sizeof(*mmie
) - 2)
996 return le16_to_cpu(mmie
->key_id
);
998 mmie16
= (struct ieee80211_mmie_16
*)
999 (skb
->data
+ skb
->len
- sizeof(*mmie16
));
1000 if (skb
->len
>= 24 + sizeof(*mmie16
) &&
1001 mmie16
->element_id
== WLAN_EID_MMIE
&&
1002 mmie16
->length
== sizeof(*mmie16
) - 2)
1003 return le16_to_cpu(mmie16
->key_id
);
1008 static int ieee80211_get_keyid(struct sk_buff
*skb
,
1009 const struct ieee80211_cipher_scheme
*cs
)
1011 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1019 fc
= hdr
->frame_control
;
1020 hdrlen
= ieee80211_hdrlen(fc
);
1023 minlen
= hdrlen
+ cs
->hdr_len
;
1024 key_idx_off
= hdrlen
+ cs
->key_idx_off
;
1025 key_idx_shift
= cs
->key_idx_shift
;
1027 /* WEP, TKIP, CCMP and GCMP */
1028 minlen
= hdrlen
+ IEEE80211_WEP_IV_LEN
;
1029 key_idx_off
= hdrlen
+ 3;
1033 if (unlikely(skb
->len
< minlen
))
1036 skb_copy_bits(skb
, key_idx_off
, &keyid
, 1);
1039 keyid
&= cs
->key_idx_mask
;
1040 keyid
>>= key_idx_shift
;
1042 /* cs could use more than the usual two bits for the keyid */
1043 if (unlikely(keyid
>= NUM_DEFAULT_KEYS
))
1049 static ieee80211_rx_result
ieee80211_rx_mesh_check(struct ieee80211_rx_data
*rx
)
1051 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1052 char *dev_addr
= rx
->sdata
->vif
.addr
;
1054 if (ieee80211_is_data(hdr
->frame_control
)) {
1055 if (is_multicast_ether_addr(hdr
->addr1
)) {
1056 if (ieee80211_has_tods(hdr
->frame_control
) ||
1057 !ieee80211_has_fromds(hdr
->frame_control
))
1058 return RX_DROP_MONITOR
;
1059 if (ether_addr_equal(hdr
->addr3
, dev_addr
))
1060 return RX_DROP_MONITOR
;
1062 if (!ieee80211_has_a4(hdr
->frame_control
))
1063 return RX_DROP_MONITOR
;
1064 if (ether_addr_equal(hdr
->addr4
, dev_addr
))
1065 return RX_DROP_MONITOR
;
1069 /* If there is not an established peer link and this is not a peer link
1070 * establisment frame, beacon or probe, drop the frame.
1073 if (!rx
->sta
|| sta_plink_state(rx
->sta
) != NL80211_PLINK_ESTAB
) {
1074 struct ieee80211_mgmt
*mgmt
;
1076 if (!ieee80211_is_mgmt(hdr
->frame_control
))
1077 return RX_DROP_MONITOR
;
1079 if (ieee80211_is_action(hdr
->frame_control
)) {
1082 /* make sure category field is present */
1083 if (rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
)
1084 return RX_DROP_MONITOR
;
1086 mgmt
= (struct ieee80211_mgmt
*)hdr
;
1087 category
= mgmt
->u
.action
.category
;
1088 if (category
!= WLAN_CATEGORY_MESH_ACTION
&&
1089 category
!= WLAN_CATEGORY_SELF_PROTECTED
)
1090 return RX_DROP_MONITOR
;
1094 if (ieee80211_is_probe_req(hdr
->frame_control
) ||
1095 ieee80211_is_probe_resp(hdr
->frame_control
) ||
1096 ieee80211_is_beacon(hdr
->frame_control
) ||
1097 ieee80211_is_auth(hdr
->frame_control
))
1100 return RX_DROP_MONITOR
;
1106 static inline bool ieee80211_rx_reorder_ready(struct tid_ampdu_rx
*tid_agg_rx
,
1109 struct sk_buff_head
*frames
= &tid_agg_rx
->reorder_buf
[index
];
1110 struct sk_buff
*tail
= skb_peek_tail(frames
);
1111 struct ieee80211_rx_status
*status
;
1113 if (tid_agg_rx
->reorder_buf_filtered
& BIT_ULL(index
))
1119 status
= IEEE80211_SKB_RXCB(tail
);
1120 if (status
->flag
& RX_FLAG_AMSDU_MORE
)
1126 static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data
*sdata
,
1127 struct tid_ampdu_rx
*tid_agg_rx
,
1129 struct sk_buff_head
*frames
)
1131 struct sk_buff_head
*skb_list
= &tid_agg_rx
->reorder_buf
[index
];
1132 struct sk_buff
*skb
;
1133 struct ieee80211_rx_status
*status
;
1135 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1137 if (skb_queue_empty(skb_list
))
1140 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1141 __skb_queue_purge(skb_list
);
1145 /* release frames from the reorder ring buffer */
1146 tid_agg_rx
->stored_mpdu_num
--;
1147 while ((skb
= __skb_dequeue(skb_list
))) {
1148 status
= IEEE80211_SKB_RXCB(skb
);
1149 status
->rx_flags
|= IEEE80211_RX_DEFERRED_RELEASE
;
1150 __skb_queue_tail(frames
, skb
);
1154 tid_agg_rx
->reorder_buf_filtered
&= ~BIT_ULL(index
);
1155 tid_agg_rx
->head_seq_num
= ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
1158 static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data
*sdata
,
1159 struct tid_ampdu_rx
*tid_agg_rx
,
1161 struct sk_buff_head
*frames
)
1165 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1167 while (ieee80211_sn_less(tid_agg_rx
->head_seq_num
, head_seq_num
)) {
1168 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1169 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
1175 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
1176 * the skb was added to the buffer longer than this time ago, the earlier
1177 * frames that have not yet been received are assumed to be lost and the skb
1178 * can be released for processing. This may also release other skb's from the
1179 * reorder buffer if there are no additional gaps between the frames.
1181 * Callers must hold tid_agg_rx->reorder_lock.
1183 #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
1185 static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data
*sdata
,
1186 struct tid_ampdu_rx
*tid_agg_rx
,
1187 struct sk_buff_head
*frames
)
1191 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1193 /* release the buffer until next missing frame */
1194 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1195 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, index
) &&
1196 tid_agg_rx
->stored_mpdu_num
) {
1198 * No buffers ready to be released, but check whether any
1199 * frames in the reorder buffer have timed out.
1202 for (j
= (index
+ 1) % tid_agg_rx
->buf_size
; j
!= index
;
1203 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
1204 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, j
)) {
1209 !time_after(jiffies
, tid_agg_rx
->reorder_time
[j
] +
1210 HT_RX_REORDER_BUF_TIMEOUT
))
1211 goto set_release_timer
;
1213 /* don't leave incomplete A-MSDUs around */
1214 for (i
= (index
+ 1) % tid_agg_rx
->buf_size
; i
!= j
;
1215 i
= (i
+ 1) % tid_agg_rx
->buf_size
)
1216 __skb_queue_purge(&tid_agg_rx
->reorder_buf
[i
]);
1218 ht_dbg_ratelimited(sdata
,
1219 "release an RX reorder frame due to timeout on earlier frames\n");
1220 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, j
,
1224 * Increment the head seq# also for the skipped slots.
1226 tid_agg_rx
->head_seq_num
=
1227 (tid_agg_rx
->head_seq_num
+
1228 skipped
) & IEEE80211_SN_MASK
;
1231 } else while (ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1232 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
1234 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1237 if (tid_agg_rx
->stored_mpdu_num
) {
1238 j
= index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1240 for (; j
!= (index
- 1) % tid_agg_rx
->buf_size
;
1241 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
1242 if (ieee80211_rx_reorder_ready(tid_agg_rx
, j
))
1248 if (!tid_agg_rx
->removed
)
1249 mod_timer(&tid_agg_rx
->reorder_timer
,
1250 tid_agg_rx
->reorder_time
[j
] + 1 +
1251 HT_RX_REORDER_BUF_TIMEOUT
);
1253 del_timer(&tid_agg_rx
->reorder_timer
);
1258 * As this function belongs to the RX path it must be under
1259 * rcu_read_lock protection. It returns false if the frame
1260 * can be processed immediately, true if it was consumed.
1262 static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data
*sdata
,
1263 struct tid_ampdu_rx
*tid_agg_rx
,
1264 struct sk_buff
*skb
,
1265 struct sk_buff_head
*frames
)
1267 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1268 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1269 u16 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1270 u16 mpdu_seq_num
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
1271 u16 head_seq_num
, buf_size
;
1275 spin_lock(&tid_agg_rx
->reorder_lock
);
1278 * Offloaded BA sessions have no known starting sequence number so pick
1279 * one from first Rxed frame for this tid after BA was started.
1281 if (unlikely(tid_agg_rx
->auto_seq
)) {
1282 tid_agg_rx
->auto_seq
= false;
1283 tid_agg_rx
->ssn
= mpdu_seq_num
;
1284 tid_agg_rx
->head_seq_num
= mpdu_seq_num
;
1287 buf_size
= tid_agg_rx
->buf_size
;
1288 head_seq_num
= tid_agg_rx
->head_seq_num
;
1291 * If the current MPDU's SN is smaller than the SSN, it shouldn't
1294 if (unlikely(!tid_agg_rx
->started
)) {
1295 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
1299 tid_agg_rx
->started
= true;
1302 /* frame with out of date sequence number */
1303 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
1309 * If frame the sequence number exceeds our buffering window
1310 * size release some previous frames to make room for this one.
1312 if (!ieee80211_sn_less(mpdu_seq_num
, head_seq_num
+ buf_size
)) {
1313 head_seq_num
= ieee80211_sn_inc(
1314 ieee80211_sn_sub(mpdu_seq_num
, buf_size
));
1315 /* release stored frames up to new head to stack */
1316 ieee80211_release_reorder_frames(sdata
, tid_agg_rx
,
1317 head_seq_num
, frames
);
1320 /* Now the new frame is always in the range of the reordering buffer */
1322 index
= mpdu_seq_num
% tid_agg_rx
->buf_size
;
1324 /* check if we already stored this frame */
1325 if (ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1331 * If the current MPDU is in the right order and nothing else
1332 * is stored we can process it directly, no need to buffer it.
1333 * If it is first but there's something stored, we may be able
1334 * to release frames after this one.
1336 if (mpdu_seq_num
== tid_agg_rx
->head_seq_num
&&
1337 tid_agg_rx
->stored_mpdu_num
== 0) {
1338 if (!(status
->flag
& RX_FLAG_AMSDU_MORE
))
1339 tid_agg_rx
->head_seq_num
=
1340 ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
1345 /* put the frame in the reordering buffer */
1346 __skb_queue_tail(&tid_agg_rx
->reorder_buf
[index
], skb
);
1347 if (!(status
->flag
& RX_FLAG_AMSDU_MORE
)) {
1348 tid_agg_rx
->reorder_time
[index
] = jiffies
;
1349 tid_agg_rx
->stored_mpdu_num
++;
1350 ieee80211_sta_reorder_release(sdata
, tid_agg_rx
, frames
);
1354 spin_unlock(&tid_agg_rx
->reorder_lock
);
1359 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
1360 * true if the MPDU was buffered, false if it should be processed.
1362 static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data
*rx
,
1363 struct sk_buff_head
*frames
)
1365 struct sk_buff
*skb
= rx
->skb
;
1366 struct ieee80211_local
*local
= rx
->local
;
1367 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1368 struct sta_info
*sta
= rx
->sta
;
1369 struct tid_ampdu_rx
*tid_agg_rx
;
1373 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
1374 is_multicast_ether_addr(hdr
->addr1
))
1378 * filter the QoS data rx stream according to
1379 * STA/TID and check if this STA/TID is on aggregation
1385 ack_policy
= *ieee80211_get_qos_ctl(hdr
) &
1386 IEEE80211_QOS_CTL_ACK_POLICY_MASK
;
1387 tid
= ieee80211_get_tid(hdr
);
1389 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
1391 if (ack_policy
== IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK
&&
1392 !test_bit(tid
, rx
->sta
->ampdu_mlme
.agg_session_valid
) &&
1393 !test_and_set_bit(tid
, rx
->sta
->ampdu_mlme
.unexpected_agg
))
1394 ieee80211_send_delba(rx
->sdata
, rx
->sta
->sta
.addr
, tid
,
1395 WLAN_BACK_RECIPIENT
,
1396 WLAN_REASON_QSTA_REQUIRE_SETUP
);
1400 /* qos null data frames are excluded */
1401 if (unlikely(hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_NULLFUNC
)))
1404 /* not part of a BA session */
1405 if (ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK
&&
1406 ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_NORMAL
)
1409 /* new, potentially un-ordered, ampdu frame - process it */
1411 /* reset session timer */
1412 if (tid_agg_rx
->timeout
)
1413 tid_agg_rx
->last_rx
= jiffies
;
1415 /* if this mpdu is fragmented - terminate rx aggregation session */
1416 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1417 if (sc
& IEEE80211_SCTL_FRAG
) {
1418 skb_queue_tail(&rx
->sdata
->skb_queue
, skb
);
1419 ieee80211_queue_work(&local
->hw
, &rx
->sdata
->work
);
1424 * No locking needed -- we will only ever process one
1425 * RX packet at a time, and thus own tid_agg_rx. All
1426 * other code manipulating it needs to (and does) make
1427 * sure that we cannot get to it any more before doing
1430 if (ieee80211_sta_manage_reorder_buf(rx
->sdata
, tid_agg_rx
, skb
,
1435 __skb_queue_tail(frames
, skb
);
1438 static ieee80211_rx_result debug_noinline
1439 ieee80211_rx_h_check_dup(struct ieee80211_rx_data
*rx
)
1441 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1442 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1444 if (status
->flag
& RX_FLAG_DUP_VALIDATED
)
1448 * Drop duplicate 802.11 retransmissions
1449 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
1452 if (rx
->skb
->len
< 24)
1455 if (ieee80211_is_ctl(hdr
->frame_control
) ||
1456 ieee80211_is_nullfunc(hdr
->frame_control
) ||
1457 ieee80211_is_qos_nullfunc(hdr
->frame_control
) ||
1458 is_multicast_ether_addr(hdr
->addr1
))
1464 if (unlikely(ieee80211_has_retry(hdr
->frame_control
) &&
1465 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] == hdr
->seq_ctrl
)) {
1466 I802_DEBUG_INC(rx
->local
->dot11FrameDuplicateCount
);
1467 rx
->sta
->rx_stats
.num_duplicates
++;
1468 return RX_DROP_UNUSABLE
;
1469 } else if (!(status
->flag
& RX_FLAG_AMSDU_MORE
)) {
1470 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] = hdr
->seq_ctrl
;
1476 static ieee80211_rx_result debug_noinline
1477 ieee80211_rx_h_check(struct ieee80211_rx_data
*rx
)
1479 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1481 /* Drop disallowed frame classes based on STA auth/assoc state;
1482 * IEEE 802.11, Chap 5.5.
1484 * mac80211 filters only based on association state, i.e. it drops
1485 * Class 3 frames from not associated stations. hostapd sends
1486 * deauth/disassoc frames when needed. In addition, hostapd is
1487 * responsible for filtering on both auth and assoc states.
1490 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1491 return ieee80211_rx_mesh_check(rx
);
1493 if (unlikely((ieee80211_is_data(hdr
->frame_control
) ||
1494 ieee80211_is_pspoll(hdr
->frame_control
)) &&
1495 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1496 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&&
1497 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_OCB
&&
1498 (!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_ASSOC
)))) {
1500 * accept port control frames from the AP even when it's not
1501 * yet marked ASSOC to prevent a race where we don't set the
1502 * assoc bit quickly enough before it sends the first frame
1504 if (rx
->sta
&& rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1505 ieee80211_is_data_present(hdr
->frame_control
)) {
1506 unsigned int hdrlen
;
1509 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1511 if (rx
->skb
->len
< hdrlen
+ 8)
1512 return RX_DROP_MONITOR
;
1514 skb_copy_bits(rx
->skb
, hdrlen
+ 6, ðertype
, 2);
1515 if (ethertype
== rx
->sdata
->control_port_protocol
)
1519 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
1520 cfg80211_rx_spurious_frame(rx
->sdata
->dev
,
1523 return RX_DROP_UNUSABLE
;
1525 return RX_DROP_MONITOR
;
1532 static ieee80211_rx_result debug_noinline
1533 ieee80211_rx_h_check_more_data(struct ieee80211_rx_data
*rx
)
1535 struct ieee80211_local
*local
;
1536 struct ieee80211_hdr
*hdr
;
1537 struct sk_buff
*skb
;
1541 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1543 if (!local
->pspolling
)
1546 if (!ieee80211_has_fromds(hdr
->frame_control
))
1547 /* this is not from AP */
1550 if (!ieee80211_is_data(hdr
->frame_control
))
1553 if (!ieee80211_has_moredata(hdr
->frame_control
)) {
1554 /* AP has no more frames buffered for us */
1555 local
->pspolling
= false;
1559 /* more data bit is set, let's request a new frame from the AP */
1560 ieee80211_send_pspoll(local
, rx
->sdata
);
1565 static void sta_ps_start(struct sta_info
*sta
)
1567 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1568 struct ieee80211_local
*local
= sdata
->local
;
1572 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1573 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1574 ps
= &sdata
->bss
->ps
;
1578 atomic_inc(&ps
->num_sta_ps
);
1579 set_sta_flag(sta
, WLAN_STA_PS_STA
);
1580 if (!ieee80211_hw_check(&local
->hw
, AP_LINK_PS
))
1581 drv_sta_notify(local
, sdata
, STA_NOTIFY_SLEEP
, &sta
->sta
);
1582 ps_dbg(sdata
, "STA %pM aid %d enters power save mode\n",
1583 sta
->sta
.addr
, sta
->sta
.aid
);
1585 ieee80211_clear_fast_xmit(sta
);
1587 if (!sta
->sta
.txq
[0])
1590 for (tid
= 0; tid
< IEEE80211_NUM_TIDS
; tid
++) {
1591 if (txq_has_queue(sta
->sta
.txq
[tid
]))
1592 set_bit(tid
, &sta
->txq_buffered_tids
);
1594 clear_bit(tid
, &sta
->txq_buffered_tids
);
1598 static void sta_ps_end(struct sta_info
*sta
)
1600 ps_dbg(sta
->sdata
, "STA %pM aid %d exits power save mode\n",
1601 sta
->sta
.addr
, sta
->sta
.aid
);
1603 if (test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) {
1605 * Clear the flag only if the other one is still set
1606 * so that the TX path won't start TX'ing new frames
1607 * directly ... In the case that the driver flag isn't
1608 * set ieee80211_sta_ps_deliver_wakeup() will clear it.
1610 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
1611 ps_dbg(sta
->sdata
, "STA %pM aid %d driver-ps-blocked\n",
1612 sta
->sta
.addr
, sta
->sta
.aid
);
1616 set_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1617 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
1618 ieee80211_sta_ps_deliver_wakeup(sta
);
1621 int ieee80211_sta_ps_transition(struct ieee80211_sta
*pubsta
, bool start
)
1623 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1626 WARN_ON(!ieee80211_hw_check(&sta
->local
->hw
, AP_LINK_PS
));
1628 /* Don't let the same PS state be set twice */
1629 in_ps
= test_sta_flag(sta
, WLAN_STA_PS_STA
);
1630 if ((start
&& in_ps
) || (!start
&& !in_ps
))
1640 EXPORT_SYMBOL(ieee80211_sta_ps_transition
);
1642 void ieee80211_sta_pspoll(struct ieee80211_sta
*pubsta
)
1644 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1646 if (test_sta_flag(sta
, WLAN_STA_SP
))
1649 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1650 ieee80211_sta_ps_deliver_poll_response(sta
);
1652 set_sta_flag(sta
, WLAN_STA_PSPOLL
);
1654 EXPORT_SYMBOL(ieee80211_sta_pspoll
);
1656 void ieee80211_sta_uapsd_trigger(struct ieee80211_sta
*pubsta
, u8 tid
)
1658 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1659 int ac
= ieee80211_ac_from_tid(tid
);
1662 * If this AC is not trigger-enabled do nothing unless the
1663 * driver is calling us after it already checked.
1665 * NB: This could/should check a separate bitmap of trigger-
1666 * enabled queues, but for now we only implement uAPSD w/o
1667 * TSPEC changes to the ACs, so they're always the same.
1669 if (!(sta
->sta
.uapsd_queues
& ieee80211_ac_to_qos_mask
[ac
]) &&
1670 tid
!= IEEE80211_NUM_TIDS
)
1673 /* if we are in a service period, do nothing */
1674 if (test_sta_flag(sta
, WLAN_STA_SP
))
1677 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1678 ieee80211_sta_ps_deliver_uapsd(sta
);
1680 set_sta_flag(sta
, WLAN_STA_UAPSD
);
1682 EXPORT_SYMBOL(ieee80211_sta_uapsd_trigger
);
1684 static ieee80211_rx_result debug_noinline
1685 ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data
*rx
)
1687 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1688 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
1689 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1694 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
1695 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
)
1699 * The device handles station powersave, so don't do anything about
1700 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1701 * it to mac80211 since they're handled.)
1703 if (ieee80211_hw_check(&sdata
->local
->hw
, AP_LINK_PS
))
1707 * Don't do anything if the station isn't already asleep. In
1708 * the uAPSD case, the station will probably be marked asleep,
1709 * in the PS-Poll case the station must be confused ...
1711 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_STA
))
1714 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
))) {
1715 ieee80211_sta_pspoll(&rx
->sta
->sta
);
1717 /* Free PS Poll skb here instead of returning RX_DROP that would
1718 * count as an dropped frame. */
1719 dev_kfree_skb(rx
->skb
);
1722 } else if (!ieee80211_has_morefrags(hdr
->frame_control
) &&
1723 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1724 ieee80211_has_pm(hdr
->frame_control
) &&
1725 (ieee80211_is_data_qos(hdr
->frame_control
) ||
1726 ieee80211_is_qos_nullfunc(hdr
->frame_control
))) {
1727 u8 tid
= ieee80211_get_tid(hdr
);
1729 ieee80211_sta_uapsd_trigger(&rx
->sta
->sta
, tid
);
1735 static ieee80211_rx_result debug_noinline
1736 ieee80211_rx_h_sta_process(struct ieee80211_rx_data
*rx
)
1738 struct sta_info
*sta
= rx
->sta
;
1739 struct sk_buff
*skb
= rx
->skb
;
1740 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1741 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1748 * Update last_rx only for IBSS packets which are for the current
1749 * BSSID and for station already AUTHORIZED to avoid keeping the
1750 * current IBSS network alive in cases where other STAs start
1751 * using different BSSID. This will also give the station another
1752 * chance to restart the authentication/authorization in case
1753 * something went wrong the first time.
1755 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
1756 u8
*bssid
= ieee80211_get_bssid(hdr
, rx
->skb
->len
,
1757 NL80211_IFTYPE_ADHOC
);
1758 if (ether_addr_equal(bssid
, rx
->sdata
->u
.ibss
.bssid
) &&
1759 test_sta_flag(sta
, WLAN_STA_AUTHORIZED
)) {
1760 sta
->rx_stats
.last_rx
= jiffies
;
1761 if (ieee80211_is_data(hdr
->frame_control
) &&
1762 !is_multicast_ether_addr(hdr
->addr1
))
1763 sta
->rx_stats
.last_rate
=
1764 sta_stats_encode_rate(status
);
1766 } else if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
) {
1767 sta
->rx_stats
.last_rx
= jiffies
;
1768 } else if (!is_multicast_ether_addr(hdr
->addr1
)) {
1770 * Mesh beacons will update last_rx when if they are found to
1771 * match the current local configuration when processed.
1773 sta
->rx_stats
.last_rx
= jiffies
;
1774 if (ieee80211_is_data(hdr
->frame_control
))
1775 sta
->rx_stats
.last_rate
= sta_stats_encode_rate(status
);
1778 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
1779 ieee80211_sta_rx_notify(rx
->sdata
, hdr
);
1781 sta
->rx_stats
.fragments
++;
1783 u64_stats_update_begin(&rx
->sta
->rx_stats
.syncp
);
1784 sta
->rx_stats
.bytes
+= rx
->skb
->len
;
1785 u64_stats_update_end(&rx
->sta
->rx_stats
.syncp
);
1787 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
1788 sta
->rx_stats
.last_signal
= status
->signal
;
1789 ewma_signal_add(&sta
->rx_stats_avg
.signal
, -status
->signal
);
1792 if (status
->chains
) {
1793 sta
->rx_stats
.chains
= status
->chains
;
1794 for (i
= 0; i
< ARRAY_SIZE(status
->chain_signal
); i
++) {
1795 int signal
= status
->chain_signal
[i
];
1797 if (!(status
->chains
& BIT(i
)))
1800 sta
->rx_stats
.chain_signal_last
[i
] = signal
;
1801 ewma_signal_add(&sta
->rx_stats_avg
.chain_signal
[i
],
1807 * Change STA power saving mode only at the end of a frame
1808 * exchange sequence, and only for a data or management
1809 * frame as specified in IEEE 802.11-2016 11.2.3.2
1811 if (!ieee80211_hw_check(&sta
->local
->hw
, AP_LINK_PS
) &&
1812 !ieee80211_has_morefrags(hdr
->frame_control
) &&
1813 !is_multicast_ether_addr(hdr
->addr1
) &&
1814 (ieee80211_is_mgmt(hdr
->frame_control
) ||
1815 ieee80211_is_data(hdr
->frame_control
)) &&
1816 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1817 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1818 rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)) {
1819 if (test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1820 if (!ieee80211_has_pm(hdr
->frame_control
))
1823 if (ieee80211_has_pm(hdr
->frame_control
))
1828 /* mesh power save support */
1829 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1830 ieee80211_mps_rx_h_sta_process(sta
, hdr
);
1833 * Drop (qos-)data::nullfunc frames silently, since they
1834 * are used only to control station power saving mode.
1836 if (ieee80211_is_nullfunc(hdr
->frame_control
) ||
1837 ieee80211_is_qos_nullfunc(hdr
->frame_control
)) {
1838 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_nullfunc
);
1841 * If we receive a 4-addr nullfunc frame from a STA
1842 * that was not moved to a 4-addr STA vlan yet send
1843 * the event to userspace and for older hostapd drop
1844 * the frame to the monitor interface.
1846 if (ieee80211_has_a4(hdr
->frame_control
) &&
1847 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1848 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1849 !rx
->sdata
->u
.vlan
.sta
))) {
1850 if (!test_and_set_sta_flag(sta
, WLAN_STA_4ADDR_EVENT
))
1851 cfg80211_rx_unexpected_4addr_frame(
1852 rx
->sdata
->dev
, sta
->sta
.addr
,
1854 return RX_DROP_MONITOR
;
1857 * Update counter and free packet here to avoid
1858 * counting this as a dropped packed.
1860 sta
->rx_stats
.packets
++;
1861 dev_kfree_skb(rx
->skb
);
1866 } /* ieee80211_rx_h_sta_process */
1868 static ieee80211_rx_result debug_noinline
1869 ieee80211_rx_h_decrypt(struct ieee80211_rx_data
*rx
)
1871 struct sk_buff
*skb
= rx
->skb
;
1872 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1873 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1875 ieee80211_rx_result result
= RX_DROP_UNUSABLE
;
1876 struct ieee80211_key
*sta_ptk
= NULL
;
1877 struct ieee80211_key
*ptk_idx
= NULL
;
1878 int mmie_keyidx
= -1;
1880 const struct ieee80211_cipher_scheme
*cs
= NULL
;
1885 * There are four types of keys:
1886 * - GTK (group keys)
1887 * - IGTK (group keys for management frames)
1888 * - PTK (pairwise keys)
1889 * - STK (station-to-station pairwise keys)
1891 * When selecting a key, we have to distinguish between multicast
1892 * (including broadcast) and unicast frames, the latter can only
1893 * use PTKs and STKs while the former always use GTKs and IGTKs.
1894 * Unless, of course, actual WEP keys ("pre-RSNA") are used, then
1895 * unicast frames can also use key indices like GTKs. Hence, if we
1896 * don't have a PTK/STK we check the key index for a WEP key.
1898 * Note that in a regular BSS, multicast frames are sent by the
1899 * AP only, associated stations unicast the frame to the AP first
1900 * which then multicasts it on their behalf.
1902 * There is also a slight problem in IBSS mode: GTKs are negotiated
1903 * with each station, that is something we don't currently handle.
1904 * The spec seems to expect that one negotiates the same key with
1905 * every station but there's no such requirement; VLANs could be
1909 /* start without a key */
1911 fc
= hdr
->frame_control
;
1914 int keyid
= rx
->sta
->ptk_idx
;
1915 sta_ptk
= rcu_dereference(rx
->sta
->ptk
[keyid
]);
1917 if (ieee80211_has_protected(fc
)) {
1918 cs
= rx
->sta
->cipher_scheme
;
1919 keyid
= ieee80211_get_keyid(rx
->skb
, cs
);
1921 if (unlikely(keyid
< 0))
1922 return RX_DROP_UNUSABLE
;
1924 ptk_idx
= rcu_dereference(rx
->sta
->ptk
[keyid
]);
1928 if (!ieee80211_has_protected(fc
))
1929 mmie_keyidx
= ieee80211_get_mmie_keyidx(rx
->skb
);
1931 if (!is_multicast_ether_addr(hdr
->addr1
) && sta_ptk
) {
1932 rx
->key
= ptk_idx
? ptk_idx
: sta_ptk
;
1933 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1934 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1936 /* Skip decryption if the frame is not protected. */
1937 if (!ieee80211_has_protected(fc
))
1939 } else if (mmie_keyidx
>= 0) {
1940 /* Broadcast/multicast robust management frame / BIP */
1941 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1942 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1945 if (mmie_keyidx
< NUM_DEFAULT_KEYS
||
1946 mmie_keyidx
>= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
)
1947 return RX_DROP_MONITOR
; /* unexpected BIP keyidx */
1949 if (ieee80211_is_group_privacy_action(skb
) &&
1950 test_sta_flag(rx
->sta
, WLAN_STA_MFP
))
1951 return RX_DROP_MONITOR
;
1953 rx
->key
= rcu_dereference(rx
->sta
->gtk
[mmie_keyidx
]);
1956 rx
->key
= rcu_dereference(rx
->sdata
->keys
[mmie_keyidx
]);
1957 } else if (!ieee80211_has_protected(fc
)) {
1959 * The frame was not protected, so skip decryption. However, we
1960 * need to set rx->key if there is a key that could have been
1961 * used so that the frame may be dropped if encryption would
1962 * have been expected.
1964 struct ieee80211_key
*key
= NULL
;
1965 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1968 if (ieee80211_is_mgmt(fc
) &&
1969 is_multicast_ether_addr(hdr
->addr1
) &&
1970 (key
= rcu_dereference(rx
->sdata
->default_mgmt_key
)))
1974 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
1975 key
= rcu_dereference(rx
->sta
->gtk
[i
]);
1981 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
1982 key
= rcu_dereference(sdata
->keys
[i
]);
1993 * The device doesn't give us the IV so we won't be
1994 * able to look up the key. That's ok though, we
1995 * don't need to decrypt the frame, we just won't
1996 * be able to keep statistics accurate.
1997 * Except for key threshold notifications, should
1998 * we somehow allow the driver to tell us which key
1999 * the hardware used if this flag is set?
2001 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
2002 (status
->flag
& RX_FLAG_IV_STRIPPED
))
2005 keyidx
= ieee80211_get_keyid(rx
->skb
, cs
);
2007 if (unlikely(keyidx
< 0))
2008 return RX_DROP_UNUSABLE
;
2010 /* check per-station GTK first, if multicast packet */
2011 if (is_multicast_ether_addr(hdr
->addr1
) && rx
->sta
)
2012 rx
->key
= rcu_dereference(rx
->sta
->gtk
[keyidx
]);
2014 /* if not found, try default key */
2016 rx
->key
= rcu_dereference(rx
->sdata
->keys
[keyidx
]);
2019 * RSNA-protected unicast frames should always be
2020 * sent with pairwise or station-to-station keys,
2021 * but for WEP we allow using a key index as well.
2024 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP40
&&
2025 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP104
&&
2026 !is_multicast_ether_addr(hdr
->addr1
))
2032 if (unlikely(rx
->key
->flags
& KEY_FLAG_TAINTED
))
2033 return RX_DROP_MONITOR
;
2035 /* TODO: add threshold stuff again */
2037 return RX_DROP_MONITOR
;
2040 switch (rx
->key
->conf
.cipher
) {
2041 case WLAN_CIPHER_SUITE_WEP40
:
2042 case WLAN_CIPHER_SUITE_WEP104
:
2043 result
= ieee80211_crypto_wep_decrypt(rx
);
2045 case WLAN_CIPHER_SUITE_TKIP
:
2046 result
= ieee80211_crypto_tkip_decrypt(rx
);
2048 case WLAN_CIPHER_SUITE_CCMP
:
2049 result
= ieee80211_crypto_ccmp_decrypt(
2050 rx
, IEEE80211_CCMP_MIC_LEN
);
2052 case WLAN_CIPHER_SUITE_CCMP_256
:
2053 result
= ieee80211_crypto_ccmp_decrypt(
2054 rx
, IEEE80211_CCMP_256_MIC_LEN
);
2056 case WLAN_CIPHER_SUITE_AES_CMAC
:
2057 result
= ieee80211_crypto_aes_cmac_decrypt(rx
);
2059 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
2060 result
= ieee80211_crypto_aes_cmac_256_decrypt(rx
);
2062 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
2063 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
2064 result
= ieee80211_crypto_aes_gmac_decrypt(rx
);
2066 case WLAN_CIPHER_SUITE_GCMP
:
2067 case WLAN_CIPHER_SUITE_GCMP_256
:
2068 result
= ieee80211_crypto_gcmp_decrypt(rx
);
2071 result
= ieee80211_crypto_hw_decrypt(rx
);
2074 /* the hdr variable is invalid after the decrypt handlers */
2076 /* either the frame has been decrypted or will be dropped */
2077 status
->flag
|= RX_FLAG_DECRYPTED
;
2082 static inline struct ieee80211_fragment_entry
*
2083 ieee80211_reassemble_add(struct ieee80211_sub_if_data
*sdata
,
2084 unsigned int frag
, unsigned int seq
, int rx_queue
,
2085 struct sk_buff
**skb
)
2087 struct ieee80211_fragment_entry
*entry
;
2089 entry
= &sdata
->fragments
[sdata
->fragment_next
++];
2090 if (sdata
->fragment_next
>= IEEE80211_FRAGMENT_MAX
)
2091 sdata
->fragment_next
= 0;
2093 if (!skb_queue_empty(&entry
->skb_list
))
2094 __skb_queue_purge(&entry
->skb_list
);
2096 __skb_queue_tail(&entry
->skb_list
, *skb
); /* no need for locking */
2098 entry
->first_frag_time
= jiffies
;
2100 entry
->rx_queue
= rx_queue
;
2101 entry
->last_frag
= frag
;
2102 entry
->check_sequential_pn
= false;
2103 entry
->extra_len
= 0;
2108 static inline struct ieee80211_fragment_entry
*
2109 ieee80211_reassemble_find(struct ieee80211_sub_if_data
*sdata
,
2110 unsigned int frag
, unsigned int seq
,
2111 int rx_queue
, struct ieee80211_hdr
*hdr
)
2113 struct ieee80211_fragment_entry
*entry
;
2116 idx
= sdata
->fragment_next
;
2117 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++) {
2118 struct ieee80211_hdr
*f_hdr
;
2119 struct sk_buff
*f_skb
;
2123 idx
= IEEE80211_FRAGMENT_MAX
- 1;
2125 entry
= &sdata
->fragments
[idx
];
2126 if (skb_queue_empty(&entry
->skb_list
) || entry
->seq
!= seq
||
2127 entry
->rx_queue
!= rx_queue
||
2128 entry
->last_frag
+ 1 != frag
)
2131 f_skb
= __skb_peek(&entry
->skb_list
);
2132 f_hdr
= (struct ieee80211_hdr
*) f_skb
->data
;
2135 * Check ftype and addresses are equal, else check next fragment
2137 if (((hdr
->frame_control
^ f_hdr
->frame_control
) &
2138 cpu_to_le16(IEEE80211_FCTL_FTYPE
)) ||
2139 !ether_addr_equal(hdr
->addr1
, f_hdr
->addr1
) ||
2140 !ether_addr_equal(hdr
->addr2
, f_hdr
->addr2
))
2143 if (time_after(jiffies
, entry
->first_frag_time
+ 2 * HZ
)) {
2144 __skb_queue_purge(&entry
->skb_list
);
2153 static ieee80211_rx_result debug_noinline
2154 ieee80211_rx_h_defragment(struct ieee80211_rx_data
*rx
)
2156 struct ieee80211_hdr
*hdr
;
2159 unsigned int frag
, seq
;
2160 struct ieee80211_fragment_entry
*entry
;
2161 struct sk_buff
*skb
;
2163 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2164 fc
= hdr
->frame_control
;
2166 if (ieee80211_is_ctl(fc
))
2169 sc
= le16_to_cpu(hdr
->seq_ctrl
);
2170 frag
= sc
& IEEE80211_SCTL_FRAG
;
2172 if (is_multicast_ether_addr(hdr
->addr1
)) {
2173 I802_DEBUG_INC(rx
->local
->dot11MulticastReceivedFrameCount
);
2177 if (likely(!ieee80211_has_morefrags(fc
) && frag
== 0))
2180 I802_DEBUG_INC(rx
->local
->rx_handlers_fragments
);
2182 if (skb_linearize(rx
->skb
))
2183 return RX_DROP_UNUSABLE
;
2186 * skb_linearize() might change the skb->data and
2187 * previously cached variables (in this case, hdr) need to
2188 * be refreshed with the new data.
2190 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2191 seq
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
2194 /* This is the first fragment of a new frame. */
2195 entry
= ieee80211_reassemble_add(rx
->sdata
, frag
, seq
,
2196 rx
->seqno_idx
, &(rx
->skb
));
2198 (rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP
||
2199 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP_256
||
2200 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_GCMP
||
2201 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_GCMP_256
) &&
2202 ieee80211_has_protected(fc
)) {
2203 int queue
= rx
->security_idx
;
2205 /* Store CCMP/GCMP PN so that we can verify that the
2206 * next fragment has a sequential PN value.
2208 entry
->check_sequential_pn
= true;
2209 memcpy(entry
->last_pn
,
2210 rx
->key
->u
.ccmp
.rx_pn
[queue
],
2211 IEEE80211_CCMP_PN_LEN
);
2212 BUILD_BUG_ON(offsetof(struct ieee80211_key
,
2214 offsetof(struct ieee80211_key
,
2216 BUILD_BUG_ON(sizeof(rx
->key
->u
.ccmp
.rx_pn
[queue
]) !=
2217 sizeof(rx
->key
->u
.gcmp
.rx_pn
[queue
]));
2218 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN
!=
2219 IEEE80211_GCMP_PN_LEN
);
2224 /* This is a fragment for a frame that should already be pending in
2225 * fragment cache. Add this fragment to the end of the pending entry.
2227 entry
= ieee80211_reassemble_find(rx
->sdata
, frag
, seq
,
2228 rx
->seqno_idx
, hdr
);
2230 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
2231 return RX_DROP_MONITOR
;
2234 /* "The receiver shall discard MSDUs and MMPDUs whose constituent
2235 * MPDU PN values are not incrementing in steps of 1."
2236 * see IEEE P802.11-REVmc/D5.0, 12.5.3.4.4, item d (for CCMP)
2237 * and IEEE P802.11-REVmc/D5.0, 12.5.5.4.4, item d (for GCMP)
2239 if (entry
->check_sequential_pn
) {
2241 u8 pn
[IEEE80211_CCMP_PN_LEN
], *rpn
;
2245 (rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_CCMP
&&
2246 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_CCMP_256
&&
2247 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_GCMP
&&
2248 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_GCMP_256
))
2249 return RX_DROP_UNUSABLE
;
2250 memcpy(pn
, entry
->last_pn
, IEEE80211_CCMP_PN_LEN
);
2251 for (i
= IEEE80211_CCMP_PN_LEN
- 1; i
>= 0; i
--) {
2256 queue
= rx
->security_idx
;
2257 rpn
= rx
->key
->u
.ccmp
.rx_pn
[queue
];
2258 if (memcmp(pn
, rpn
, IEEE80211_CCMP_PN_LEN
))
2259 return RX_DROP_UNUSABLE
;
2260 memcpy(entry
->last_pn
, pn
, IEEE80211_CCMP_PN_LEN
);
2263 skb_pull(rx
->skb
, ieee80211_hdrlen(fc
));
2264 __skb_queue_tail(&entry
->skb_list
, rx
->skb
);
2265 entry
->last_frag
= frag
;
2266 entry
->extra_len
+= rx
->skb
->len
;
2267 if (ieee80211_has_morefrags(fc
)) {
2272 rx
->skb
= __skb_dequeue(&entry
->skb_list
);
2273 if (skb_tailroom(rx
->skb
) < entry
->extra_len
) {
2274 I802_DEBUG_INC(rx
->local
->rx_expand_skb_head_defrag
);
2275 if (unlikely(pskb_expand_head(rx
->skb
, 0, entry
->extra_len
,
2277 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
2278 __skb_queue_purge(&entry
->skb_list
);
2279 return RX_DROP_UNUSABLE
;
2282 while ((skb
= __skb_dequeue(&entry
->skb_list
))) {
2283 skb_put_data(rx
->skb
, skb
->data
, skb
->len
);
2288 ieee80211_led_rx(rx
->local
);
2291 rx
->sta
->rx_stats
.packets
++;
2295 static int ieee80211_802_1x_port_control(struct ieee80211_rx_data
*rx
)
2297 if (unlikely(!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_AUTHORIZED
)))
2303 static int ieee80211_drop_unencrypted(struct ieee80211_rx_data
*rx
, __le16 fc
)
2305 struct sk_buff
*skb
= rx
->skb
;
2306 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2309 * Pass through unencrypted frames if the hardware has
2310 * decrypted them already.
2312 if (status
->flag
& RX_FLAG_DECRYPTED
)
2315 /* Drop unencrypted frames if key is set. */
2316 if (unlikely(!ieee80211_has_protected(fc
) &&
2317 !ieee80211_is_nullfunc(fc
) &&
2318 ieee80211_is_data(fc
) && rx
->key
))
2324 static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data
*rx
)
2326 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2327 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2328 __le16 fc
= hdr
->frame_control
;
2331 * Pass through unencrypted frames if the hardware has
2332 * decrypted them already.
2334 if (status
->flag
& RX_FLAG_DECRYPTED
)
2337 if (rx
->sta
&& test_sta_flag(rx
->sta
, WLAN_STA_MFP
)) {
2338 if (unlikely(!ieee80211_has_protected(fc
) &&
2339 ieee80211_is_unicast_robust_mgmt_frame(rx
->skb
) &&
2341 if (ieee80211_is_deauth(fc
) ||
2342 ieee80211_is_disassoc(fc
))
2343 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2348 /* BIP does not use Protected field, so need to check MMIE */
2349 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx
->skb
) &&
2350 ieee80211_get_mmie_keyidx(rx
->skb
) < 0)) {
2351 if (ieee80211_is_deauth(fc
) ||
2352 ieee80211_is_disassoc(fc
))
2353 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2359 * When using MFP, Action frames are not allowed prior to
2360 * having configured keys.
2362 if (unlikely(ieee80211_is_action(fc
) && !rx
->key
&&
2363 ieee80211_is_robust_mgmt_frame(rx
->skb
)))
2371 __ieee80211_data_to_8023(struct ieee80211_rx_data
*rx
, bool *port_control
)
2373 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2374 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2375 bool check_port_control
= false;
2376 struct ethhdr
*ehdr
;
2379 *port_control
= false;
2380 if (ieee80211_has_a4(hdr
->frame_control
) &&
2381 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& !sdata
->u
.vlan
.sta
)
2384 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
2385 !!sdata
->u
.mgd
.use_4addr
!= !!ieee80211_has_a4(hdr
->frame_control
)) {
2387 if (!sdata
->u
.mgd
.use_4addr
)
2389 else if (!ether_addr_equal(hdr
->addr1
, sdata
->vif
.addr
))
2390 check_port_control
= true;
2393 if (is_multicast_ether_addr(hdr
->addr1
) &&
2394 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& sdata
->u
.vlan
.sta
)
2397 ret
= ieee80211_data_to_8023(rx
->skb
, sdata
->vif
.addr
, sdata
->vif
.type
);
2401 ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2402 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
)
2403 *port_control
= true;
2404 else if (check_port_control
)
2411 * requires that rx->skb is a frame with ethernet header
2413 static bool ieee80211_frame_allowed(struct ieee80211_rx_data
*rx
, __le16 fc
)
2415 static const u8 pae_group_addr
[ETH_ALEN
] __aligned(2)
2416 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
2417 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2420 * Allow EAPOL frames to us/the PAE group address regardless
2421 * of whether the frame was encrypted or not.
2423 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
&&
2424 (ether_addr_equal(ehdr
->h_dest
, rx
->sdata
->vif
.addr
) ||
2425 ether_addr_equal(ehdr
->h_dest
, pae_group_addr
)))
2428 if (ieee80211_802_1x_port_control(rx
) ||
2429 ieee80211_drop_unencrypted(rx
, fc
))
2435 static void ieee80211_deliver_skb_to_local_stack(struct sk_buff
*skb
,
2436 struct ieee80211_rx_data
*rx
)
2438 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2439 struct net_device
*dev
= sdata
->dev
;
2441 if (unlikely((skb
->protocol
== sdata
->control_port_protocol
||
2442 skb
->protocol
== cpu_to_be16(ETH_P_PREAUTH
)) &&
2443 sdata
->control_port_over_nl80211
)) {
2444 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2445 bool noencrypt
= status
->flag
& RX_FLAG_DECRYPTED
;
2447 cfg80211_rx_control_port(dev
, skb
, noencrypt
);
2450 /* deliver to local stack */
2452 napi_gro_receive(rx
->napi
, skb
);
2454 netif_receive_skb(skb
);
2459 * requires that rx->skb is a frame with ethernet header
2462 ieee80211_deliver_skb(struct ieee80211_rx_data
*rx
)
2464 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2465 struct net_device
*dev
= sdata
->dev
;
2466 struct sk_buff
*skb
, *xmit_skb
;
2467 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2468 struct sta_info
*dsta
;
2473 ieee80211_rx_stats(dev
, skb
->len
);
2476 /* The seqno index has the same property as needed
2477 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
2478 * for non-QoS-data frames. Here we know it's a data
2479 * frame, so count MSDUs.
2481 u64_stats_update_begin(&rx
->sta
->rx_stats
.syncp
);
2482 rx
->sta
->rx_stats
.msdu
[rx
->seqno_idx
]++;
2483 u64_stats_update_end(&rx
->sta
->rx_stats
.syncp
);
2486 if ((sdata
->vif
.type
== NL80211_IFTYPE_AP
||
2487 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) &&
2488 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
2489 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
|| !sdata
->u
.vlan
.sta
)) {
2490 if (is_multicast_ether_addr(ehdr
->h_dest
) &&
2491 ieee80211_vif_get_num_mcast_if(sdata
) != 0) {
2493 * send multicast frames both to higher layers in
2494 * local net stack and back to the wireless medium
2496 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
2498 net_info_ratelimited("%s: failed to clone multicast frame\n",
2500 } else if (!is_multicast_ether_addr(ehdr
->h_dest
) &&
2501 !ether_addr_equal(ehdr
->h_dest
, ehdr
->h_source
)) {
2502 dsta
= sta_info_get(sdata
, ehdr
->h_dest
);
2505 * The destination station is associated to
2506 * this AP (in this VLAN), so send the frame
2507 * directly to it and do not pass it to local
2516 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
2518 /* 'align' will only take the values 0 or 2 here since all
2519 * frames are required to be aligned to 2-byte boundaries
2520 * when being passed to mac80211; the code here works just
2521 * as well if that isn't true, but mac80211 assumes it can
2522 * access fields as 2-byte aligned (e.g. for ether_addr_equal)
2526 align
= (unsigned long)(skb
->data
+ sizeof(struct ethhdr
)) & 3;
2528 if (WARN_ON(skb_headroom(skb
) < 3)) {
2532 u8
*data
= skb
->data
;
2533 size_t len
= skb_headlen(skb
);
2535 memmove(skb
->data
, data
, len
);
2536 skb_set_tail_pointer(skb
, len
);
2543 skb
->protocol
= eth_type_trans(skb
, dev
);
2544 memset(skb
->cb
, 0, sizeof(skb
->cb
));
2546 ieee80211_deliver_skb_to_local_stack(skb
, rx
);
2551 * Send to wireless media and increase priority by 256 to
2552 * keep the received priority instead of reclassifying
2553 * the frame (see cfg80211_classify8021d).
2555 xmit_skb
->priority
+= 256;
2556 xmit_skb
->protocol
= htons(ETH_P_802_3
);
2557 skb_reset_network_header(xmit_skb
);
2558 skb_reset_mac_header(xmit_skb
);
2559 dev_queue_xmit(xmit_skb
);
2563 static ieee80211_rx_result debug_noinline
2564 __ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
, u8 data_offset
)
2566 struct net_device
*dev
= rx
->sdata
->dev
;
2567 struct sk_buff
*skb
= rx
->skb
;
2568 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
2569 __le16 fc
= hdr
->frame_control
;
2570 struct sk_buff_head frame_list
;
2571 struct ethhdr ethhdr
;
2572 const u8
*check_da
= ethhdr
.h_dest
, *check_sa
= ethhdr
.h_source
;
2574 if (unlikely(ieee80211_has_a4(hdr
->frame_control
))) {
2577 } else switch (rx
->sdata
->vif
.type
) {
2578 case NL80211_IFTYPE_AP
:
2579 case NL80211_IFTYPE_AP_VLAN
:
2582 case NL80211_IFTYPE_STATION
:
2584 !test_sta_flag(rx
->sta
, WLAN_STA_TDLS_PEER
))
2587 case NL80211_IFTYPE_MESH_POINT
:
2595 __skb_queue_head_init(&frame_list
);
2597 if (ieee80211_data_to_8023_exthdr(skb
, ðhdr
,
2598 rx
->sdata
->vif
.addr
,
2599 rx
->sdata
->vif
.type
,
2601 return RX_DROP_UNUSABLE
;
2603 ieee80211_amsdu_to_8023s(skb
, &frame_list
, dev
->dev_addr
,
2604 rx
->sdata
->vif
.type
,
2605 rx
->local
->hw
.extra_tx_headroom
,
2606 check_da
, check_sa
);
2608 while (!skb_queue_empty(&frame_list
)) {
2609 rx
->skb
= __skb_dequeue(&frame_list
);
2611 if (!ieee80211_frame_allowed(rx
, fc
)) {
2612 dev_kfree_skb(rx
->skb
);
2616 ieee80211_deliver_skb(rx
);
2622 static ieee80211_rx_result debug_noinline
2623 ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
)
2625 struct sk_buff
*skb
= rx
->skb
;
2626 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2627 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
2628 __le16 fc
= hdr
->frame_control
;
2630 if (!(status
->rx_flags
& IEEE80211_RX_AMSDU
))
2633 if (unlikely(!ieee80211_is_data(fc
)))
2636 if (unlikely(!ieee80211_is_data_present(fc
)))
2637 return RX_DROP_MONITOR
;
2639 if (unlikely(ieee80211_has_a4(hdr
->frame_control
))) {
2640 switch (rx
->sdata
->vif
.type
) {
2641 case NL80211_IFTYPE_AP_VLAN
:
2642 if (!rx
->sdata
->u
.vlan
.sta
)
2643 return RX_DROP_UNUSABLE
;
2645 case NL80211_IFTYPE_STATION
:
2646 if (!rx
->sdata
->u
.mgd
.use_4addr
)
2647 return RX_DROP_UNUSABLE
;
2650 return RX_DROP_UNUSABLE
;
2654 if (is_multicast_ether_addr(hdr
->addr1
))
2655 return RX_DROP_UNUSABLE
;
2657 return __ieee80211_rx_h_amsdu(rx
, 0);
2660 #ifdef CONFIG_MAC80211_MESH
2661 static ieee80211_rx_result
2662 ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data
*rx
)
2664 struct ieee80211_hdr
*fwd_hdr
, *hdr
;
2665 struct ieee80211_tx_info
*info
;
2666 struct ieee80211s_hdr
*mesh_hdr
;
2667 struct sk_buff
*skb
= rx
->skb
, *fwd_skb
;
2668 struct ieee80211_local
*local
= rx
->local
;
2669 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2670 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2674 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2675 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
2677 /* make sure fixed part of mesh header is there, also checks skb len */
2678 if (!pskb_may_pull(rx
->skb
, hdrlen
+ 6))
2679 return RX_DROP_MONITOR
;
2681 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2683 /* make sure full mesh header is there, also checks skb len */
2684 if (!pskb_may_pull(rx
->skb
,
2685 hdrlen
+ ieee80211_get_mesh_hdrlen(mesh_hdr
)))
2686 return RX_DROP_MONITOR
;
2688 /* reload pointers */
2689 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2690 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2692 if (ieee80211_drop_unencrypted(rx
, hdr
->frame_control
))
2693 return RX_DROP_MONITOR
;
2695 /* frame is in RMC, don't forward */
2696 if (ieee80211_is_data(hdr
->frame_control
) &&
2697 is_multicast_ether_addr(hdr
->addr1
) &&
2698 mesh_rmc_check(rx
->sdata
, hdr
->addr3
, mesh_hdr
))
2699 return RX_DROP_MONITOR
;
2701 if (!ieee80211_is_data(hdr
->frame_control
))
2705 return RX_DROP_MONITOR
;
2707 if (mesh_hdr
->flags
& MESH_FLAGS_AE
) {
2708 struct mesh_path
*mppath
;
2712 if (is_multicast_ether_addr(hdr
->addr1
)) {
2713 mpp_addr
= hdr
->addr3
;
2714 proxied_addr
= mesh_hdr
->eaddr1
;
2715 } else if ((mesh_hdr
->flags
& MESH_FLAGS_AE
) ==
2716 MESH_FLAGS_AE_A5_A6
) {
2717 /* has_a4 already checked in ieee80211_rx_mesh_check */
2718 mpp_addr
= hdr
->addr4
;
2719 proxied_addr
= mesh_hdr
->eaddr2
;
2721 return RX_DROP_MONITOR
;
2725 mppath
= mpp_path_lookup(sdata
, proxied_addr
);
2727 mpp_path_add(sdata
, proxied_addr
, mpp_addr
);
2729 spin_lock_bh(&mppath
->state_lock
);
2730 if (!ether_addr_equal(mppath
->mpp
, mpp_addr
))
2731 memcpy(mppath
->mpp
, mpp_addr
, ETH_ALEN
);
2732 mppath
->exp_time
= jiffies
;
2733 spin_unlock_bh(&mppath
->state_lock
);
2738 /* Frame has reached destination. Don't forward */
2739 if (!is_multicast_ether_addr(hdr
->addr1
) &&
2740 ether_addr_equal(sdata
->vif
.addr
, hdr
->addr3
))
2743 ac
= ieee80211_select_queue_80211(sdata
, skb
, hdr
);
2744 q
= sdata
->vif
.hw_queue
[ac
];
2745 if (ieee80211_queue_stopped(&local
->hw
, q
)) {
2746 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_congestion
);
2747 return RX_DROP_MONITOR
;
2749 skb_set_queue_mapping(skb
, q
);
2751 if (!--mesh_hdr
->ttl
) {
2752 if (!is_multicast_ether_addr(hdr
->addr1
))
2753 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
,
2754 dropped_frames_ttl
);
2758 if (!ifmsh
->mshcfg
.dot11MeshForwarding
)
2761 if (sdata
->crypto_tx_tailroom_needed_cnt
)
2762 tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
2764 fwd_skb
= skb_copy_expand(skb
, local
->tx_headroom
+
2765 sdata
->encrypt_headroom
,
2766 tailroom
, GFP_ATOMIC
);
2770 fwd_hdr
= (struct ieee80211_hdr
*) fwd_skb
->data
;
2771 fwd_hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_RETRY
);
2772 info
= IEEE80211_SKB_CB(fwd_skb
);
2773 memset(info
, 0, sizeof(*info
));
2774 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
2775 info
->control
.vif
= &rx
->sdata
->vif
;
2776 info
->control
.jiffies
= jiffies
;
2777 if (is_multicast_ether_addr(fwd_hdr
->addr1
)) {
2778 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_mcast
);
2779 memcpy(fwd_hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2780 /* update power mode indication when forwarding */
2781 ieee80211_mps_set_frame_flags(sdata
, NULL
, fwd_hdr
);
2782 } else if (!mesh_nexthop_lookup(sdata
, fwd_skb
)) {
2783 /* mesh power mode flags updated in mesh_nexthop_lookup */
2784 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_unicast
);
2786 /* unable to resolve next hop */
2787 mesh_path_error_tx(sdata
, ifmsh
->mshcfg
.element_ttl
,
2789 WLAN_REASON_MESH_PATH_NOFORWARD
,
2791 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_no_route
);
2793 return RX_DROP_MONITOR
;
2796 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_frames
);
2797 ieee80211_add_pending_skb(local
, fwd_skb
);
2799 if (is_multicast_ether_addr(hdr
->addr1
))
2801 return RX_DROP_MONITOR
;
2805 static ieee80211_rx_result debug_noinline
2806 ieee80211_rx_h_data(struct ieee80211_rx_data
*rx
)
2808 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2809 struct ieee80211_local
*local
= rx
->local
;
2810 struct net_device
*dev
= sdata
->dev
;
2811 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2812 __le16 fc
= hdr
->frame_control
;
2816 if (unlikely(!ieee80211_is_data(hdr
->frame_control
)))
2819 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
2820 return RX_DROP_MONITOR
;
2823 * Send unexpected-4addr-frame event to hostapd. For older versions,
2824 * also drop the frame to cooked monitor interfaces.
2826 if (ieee80211_has_a4(hdr
->frame_control
) &&
2827 sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2829 !test_and_set_sta_flag(rx
->sta
, WLAN_STA_4ADDR_EVENT
))
2830 cfg80211_rx_unexpected_4addr_frame(
2831 rx
->sdata
->dev
, rx
->sta
->sta
.addr
, GFP_ATOMIC
);
2832 return RX_DROP_MONITOR
;
2835 err
= __ieee80211_data_to_8023(rx
, &port_control
);
2837 return RX_DROP_UNUSABLE
;
2839 if (!ieee80211_frame_allowed(rx
, fc
))
2840 return RX_DROP_MONITOR
;
2842 /* directly handle TDLS channel switch requests/responses */
2843 if (unlikely(((struct ethhdr
*)rx
->skb
->data
)->h_proto
==
2844 cpu_to_be16(ETH_P_TDLS
))) {
2845 struct ieee80211_tdls_data
*tf
= (void *)rx
->skb
->data
;
2847 if (pskb_may_pull(rx
->skb
,
2848 offsetof(struct ieee80211_tdls_data
, u
)) &&
2849 tf
->payload_type
== WLAN_TDLS_SNAP_RFTYPE
&&
2850 tf
->category
== WLAN_CATEGORY_TDLS
&&
2851 (tf
->action_code
== WLAN_TDLS_CHANNEL_SWITCH_REQUEST
||
2852 tf
->action_code
== WLAN_TDLS_CHANNEL_SWITCH_RESPONSE
)) {
2853 skb_queue_tail(&local
->skb_queue_tdls_chsw
, rx
->skb
);
2854 schedule_work(&local
->tdls_chsw_work
);
2856 rx
->sta
->rx_stats
.packets
++;
2862 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
2863 unlikely(port_control
) && sdata
->bss
) {
2864 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
2872 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
) &&
2873 local
->ps_sdata
&& local
->hw
.conf
.dynamic_ps_timeout
> 0 &&
2874 !is_multicast_ether_addr(
2875 ((struct ethhdr
*)rx
->skb
->data
)->h_dest
) &&
2876 (!local
->scanning
&&
2877 !test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
)))
2878 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
2879 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
2881 ieee80211_deliver_skb(rx
);
2886 static ieee80211_rx_result debug_noinline
2887 ieee80211_rx_h_ctrl(struct ieee80211_rx_data
*rx
, struct sk_buff_head
*frames
)
2889 struct sk_buff
*skb
= rx
->skb
;
2890 struct ieee80211_bar
*bar
= (struct ieee80211_bar
*)skb
->data
;
2891 struct tid_ampdu_rx
*tid_agg_rx
;
2895 if (likely(!ieee80211_is_ctl(bar
->frame_control
)))
2898 if (ieee80211_is_back_req(bar
->frame_control
)) {
2900 __le16 control
, start_seq_num
;
2901 } __packed bar_data
;
2902 struct ieee80211_event event
= {
2903 .type
= BAR_RX_EVENT
,
2907 return RX_DROP_MONITOR
;
2909 if (skb_copy_bits(skb
, offsetof(struct ieee80211_bar
, control
),
2910 &bar_data
, sizeof(bar_data
)))
2911 return RX_DROP_MONITOR
;
2913 tid
= le16_to_cpu(bar_data
.control
) >> 12;
2915 if (!test_bit(tid
, rx
->sta
->ampdu_mlme
.agg_session_valid
) &&
2916 !test_and_set_bit(tid
, rx
->sta
->ampdu_mlme
.unexpected_agg
))
2917 ieee80211_send_delba(rx
->sdata
, rx
->sta
->sta
.addr
, tid
,
2918 WLAN_BACK_RECIPIENT
,
2919 WLAN_REASON_QSTA_REQUIRE_SETUP
);
2921 tid_agg_rx
= rcu_dereference(rx
->sta
->ampdu_mlme
.tid_rx
[tid
]);
2923 return RX_DROP_MONITOR
;
2925 start_seq_num
= le16_to_cpu(bar_data
.start_seq_num
) >> 4;
2926 event
.u
.ba
.tid
= tid
;
2927 event
.u
.ba
.ssn
= start_seq_num
;
2928 event
.u
.ba
.sta
= &rx
->sta
->sta
;
2930 /* reset session timer */
2931 if (tid_agg_rx
->timeout
)
2932 mod_timer(&tid_agg_rx
->session_timer
,
2933 TU_TO_EXP_TIME(tid_agg_rx
->timeout
));
2935 spin_lock(&tid_agg_rx
->reorder_lock
);
2936 /* release stored frames up to start of BAR */
2937 ieee80211_release_reorder_frames(rx
->sdata
, tid_agg_rx
,
2938 start_seq_num
, frames
);
2939 spin_unlock(&tid_agg_rx
->reorder_lock
);
2941 drv_event_callback(rx
->local
, rx
->sdata
, &event
);
2948 * After this point, we only want management frames,
2949 * so we can drop all remaining control frames to
2950 * cooked monitor interfaces.
2952 return RX_DROP_MONITOR
;
2955 static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data
*sdata
,
2956 struct ieee80211_mgmt
*mgmt
,
2959 struct ieee80211_local
*local
= sdata
->local
;
2960 struct sk_buff
*skb
;
2961 struct ieee80211_mgmt
*resp
;
2963 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
)) {
2964 /* Not to own unicast address */
2968 if (!ether_addr_equal(mgmt
->sa
, sdata
->u
.mgd
.bssid
) ||
2969 !ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
)) {
2970 /* Not from the current AP or not associated yet. */
2974 if (len
< 24 + 1 + sizeof(resp
->u
.action
.u
.sa_query
)) {
2975 /* Too short SA Query request frame */
2979 skb
= dev_alloc_skb(sizeof(*resp
) + local
->hw
.extra_tx_headroom
);
2983 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2984 resp
= skb_put_zero(skb
, 24);
2985 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
2986 memcpy(resp
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2987 memcpy(resp
->bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2988 resp
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2989 IEEE80211_STYPE_ACTION
);
2990 skb_put(skb
, 1 + sizeof(resp
->u
.action
.u
.sa_query
));
2991 resp
->u
.action
.category
= WLAN_CATEGORY_SA_QUERY
;
2992 resp
->u
.action
.u
.sa_query
.action
= WLAN_ACTION_SA_QUERY_RESPONSE
;
2993 memcpy(resp
->u
.action
.u
.sa_query
.trans_id
,
2994 mgmt
->u
.action
.u
.sa_query
.trans_id
,
2995 WLAN_SA_QUERY_TR_ID_LEN
);
2997 ieee80211_tx_skb(sdata
, skb
);
3000 static ieee80211_rx_result debug_noinline
3001 ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data
*rx
)
3003 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3004 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3007 * From here on, look only at management frames.
3008 * Data and control frames are already handled,
3009 * and unknown (reserved) frames are useless.
3011 if (rx
->skb
->len
< 24)
3012 return RX_DROP_MONITOR
;
3014 if (!ieee80211_is_mgmt(mgmt
->frame_control
))
3015 return RX_DROP_MONITOR
;
3017 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
3018 ieee80211_is_beacon(mgmt
->frame_control
) &&
3019 !(rx
->flags
& IEEE80211_RX_BEACON_REPORTED
)) {
3022 if (ieee80211_hw_check(&rx
->local
->hw
, SIGNAL_DBM
) &&
3023 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
))
3024 sig
= status
->signal
;
3026 cfg80211_report_obss_beacon(rx
->local
->hw
.wiphy
,
3027 rx
->skb
->data
, rx
->skb
->len
,
3029 rx
->flags
|= IEEE80211_RX_BEACON_REPORTED
;
3032 if (ieee80211_drop_unencrypted_mgmt(rx
))
3033 return RX_DROP_UNUSABLE
;
3038 static ieee80211_rx_result debug_noinline
3039 ieee80211_rx_h_action(struct ieee80211_rx_data
*rx
)
3041 struct ieee80211_local
*local
= rx
->local
;
3042 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3043 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3044 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3045 int len
= rx
->skb
->len
;
3047 if (!ieee80211_is_action(mgmt
->frame_control
))
3050 /* drop too small frames */
3051 if (len
< IEEE80211_MIN_ACTION_SIZE
)
3052 return RX_DROP_UNUSABLE
;
3054 if (!rx
->sta
&& mgmt
->u
.action
.category
!= WLAN_CATEGORY_PUBLIC
&&
3055 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SELF_PROTECTED
&&
3056 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SPECTRUM_MGMT
)
3057 return RX_DROP_UNUSABLE
;
3059 switch (mgmt
->u
.action
.category
) {
3060 case WLAN_CATEGORY_HT
:
3061 /* reject HT action frames from stations not supporting HT */
3062 if (!rx
->sta
->sta
.ht_cap
.ht_supported
)
3065 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3066 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3067 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3068 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3069 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3072 /* verify action & smps_control/chanwidth are present */
3073 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
3076 switch (mgmt
->u
.action
.u
.ht_smps
.action
) {
3077 case WLAN_HT_ACTION_SMPS
: {
3078 struct ieee80211_supported_band
*sband
;
3079 enum ieee80211_smps_mode smps_mode
;
3080 struct sta_opmode_info sta_opmode
= {};
3082 /* convert to HT capability */
3083 switch (mgmt
->u
.action
.u
.ht_smps
.smps_control
) {
3084 case WLAN_HT_SMPS_CONTROL_DISABLED
:
3085 smps_mode
= IEEE80211_SMPS_OFF
;
3087 case WLAN_HT_SMPS_CONTROL_STATIC
:
3088 smps_mode
= IEEE80211_SMPS_STATIC
;
3090 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
3091 smps_mode
= IEEE80211_SMPS_DYNAMIC
;
3097 /* if no change do nothing */
3098 if (rx
->sta
->sta
.smps_mode
== smps_mode
)
3100 rx
->sta
->sta
.smps_mode
= smps_mode
;
3101 sta_opmode
.smps_mode
=
3102 ieee80211_smps_mode_to_smps_mode(smps_mode
);
3103 sta_opmode
.changed
= STA_OPMODE_SMPS_MODE_CHANGED
;
3105 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3107 rate_control_rate_update(local
, sband
, rx
->sta
,
3108 IEEE80211_RC_SMPS_CHANGED
);
3109 cfg80211_sta_opmode_change_notify(sdata
->dev
,
3115 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH
: {
3116 struct ieee80211_supported_band
*sband
;
3117 u8 chanwidth
= mgmt
->u
.action
.u
.ht_notify_cw
.chanwidth
;
3118 enum ieee80211_sta_rx_bandwidth max_bw
, new_bw
;
3119 struct sta_opmode_info sta_opmode
= {};
3121 /* If it doesn't support 40 MHz it can't change ... */
3122 if (!(rx
->sta
->sta
.ht_cap
.cap
&
3123 IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
3126 if (chanwidth
== IEEE80211_HT_CHANWIDTH_20MHZ
)
3127 max_bw
= IEEE80211_STA_RX_BW_20
;
3129 max_bw
= ieee80211_sta_cap_rx_bw(rx
->sta
);
3131 /* set cur_max_bandwidth and recalc sta bw */
3132 rx
->sta
->cur_max_bandwidth
= max_bw
;
3133 new_bw
= ieee80211_sta_cur_vht_bw(rx
->sta
);
3135 if (rx
->sta
->sta
.bandwidth
== new_bw
)
3138 rx
->sta
->sta
.bandwidth
= new_bw
;
3139 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3141 ieee80211_sta_rx_bw_to_chan_width(rx
->sta
);
3142 sta_opmode
.changed
= STA_OPMODE_MAX_BW_CHANGED
;
3144 rate_control_rate_update(local
, sband
, rx
->sta
,
3145 IEEE80211_RC_BW_CHANGED
);
3146 cfg80211_sta_opmode_change_notify(sdata
->dev
,
3157 case WLAN_CATEGORY_PUBLIC
:
3158 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3160 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3164 if (!ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
))
3166 if (mgmt
->u
.action
.u
.ext_chan_switch
.action_code
!=
3167 WLAN_PUB_ACTION_EXT_CHANSW_ANN
)
3169 if (len
< offsetof(struct ieee80211_mgmt
,
3170 u
.action
.u
.ext_chan_switch
.variable
))
3173 case WLAN_CATEGORY_VHT
:
3174 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3175 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3176 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3177 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3178 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3181 /* verify action code is present */
3182 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3185 switch (mgmt
->u
.action
.u
.vht_opmode_notif
.action_code
) {
3186 case WLAN_VHT_ACTION_OPMODE_NOTIF
: {
3187 /* verify opmode is present */
3188 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
3192 case WLAN_VHT_ACTION_GROUPID_MGMT
: {
3193 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 25)
3201 case WLAN_CATEGORY_BACK
:
3202 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3203 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3204 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3205 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3206 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3209 /* verify action_code is present */
3210 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3213 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
3214 case WLAN_ACTION_ADDBA_REQ
:
3215 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3216 sizeof(mgmt
->u
.action
.u
.addba_req
)))
3219 case WLAN_ACTION_ADDBA_RESP
:
3220 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3221 sizeof(mgmt
->u
.action
.u
.addba_resp
)))
3224 case WLAN_ACTION_DELBA
:
3225 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3226 sizeof(mgmt
->u
.action
.u
.delba
)))
3234 case WLAN_CATEGORY_SPECTRUM_MGMT
:
3235 /* verify action_code is present */
3236 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3239 switch (mgmt
->u
.action
.u
.measurement
.action_code
) {
3240 case WLAN_ACTION_SPCT_MSR_REQ
:
3241 if (status
->band
!= NL80211_BAND_5GHZ
)
3244 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3245 sizeof(mgmt
->u
.action
.u
.measurement
)))
3248 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3251 ieee80211_process_measurement_req(sdata
, mgmt
, len
);
3253 case WLAN_ACTION_SPCT_CHL_SWITCH
: {
3255 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3256 sizeof(mgmt
->u
.action
.u
.chan_switch
)))
3259 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3260 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3261 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
3264 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
3265 bssid
= sdata
->u
.mgd
.bssid
;
3266 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
3267 bssid
= sdata
->u
.ibss
.bssid
;
3268 else if (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
3273 if (!ether_addr_equal(mgmt
->bssid
, bssid
))
3280 case WLAN_CATEGORY_SA_QUERY
:
3281 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3282 sizeof(mgmt
->u
.action
.u
.sa_query
)))
3285 switch (mgmt
->u
.action
.u
.sa_query
.action
) {
3286 case WLAN_ACTION_SA_QUERY_REQUEST
:
3287 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3289 ieee80211_process_sa_query_req(sdata
, mgmt
, len
);
3293 case WLAN_CATEGORY_SELF_PROTECTED
:
3294 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3295 sizeof(mgmt
->u
.action
.u
.self_prot
.action_code
)))
3298 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
3299 case WLAN_SP_MESH_PEERING_OPEN
:
3300 case WLAN_SP_MESH_PEERING_CLOSE
:
3301 case WLAN_SP_MESH_PEERING_CONFIRM
:
3302 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3304 if (sdata
->u
.mesh
.user_mpm
)
3305 /* userspace handles this frame */
3308 case WLAN_SP_MGK_INFORM
:
3309 case WLAN_SP_MGK_ACK
:
3310 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3315 case WLAN_CATEGORY_MESH_ACTION
:
3316 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3317 sizeof(mgmt
->u
.action
.u
.mesh_action
.action_code
)))
3320 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3322 if (mesh_action_is_path_sel(mgmt
) &&
3323 !mesh_path_sel_is_hwmp(sdata
))
3331 status
->rx_flags
|= IEEE80211_RX_MALFORMED_ACTION_FRM
;
3332 /* will return in the next handlers */
3337 rx
->sta
->rx_stats
.packets
++;
3338 dev_kfree_skb(rx
->skb
);
3342 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
3343 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3345 rx
->sta
->rx_stats
.packets
++;
3349 static ieee80211_rx_result debug_noinline
3350 ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data
*rx
)
3352 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3355 /* skip known-bad action frames and return them in the next handler */
3356 if (status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
)
3360 * Getting here means the kernel doesn't know how to handle
3361 * it, but maybe userspace does ... include returned frames
3362 * so userspace can register for those to know whether ones
3363 * it transmitted were processed or returned.
3366 if (ieee80211_hw_check(&rx
->local
->hw
, SIGNAL_DBM
) &&
3367 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
))
3368 sig
= status
->signal
;
3370 if (cfg80211_rx_mgmt(&rx
->sdata
->wdev
, status
->freq
, sig
,
3371 rx
->skb
->data
, rx
->skb
->len
, 0)) {
3373 rx
->sta
->rx_stats
.packets
++;
3374 dev_kfree_skb(rx
->skb
);
3381 static ieee80211_rx_result debug_noinline
3382 ieee80211_rx_h_action_return(struct ieee80211_rx_data
*rx
)
3384 struct ieee80211_local
*local
= rx
->local
;
3385 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3386 struct sk_buff
*nskb
;
3387 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3388 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3390 if (!ieee80211_is_action(mgmt
->frame_control
))
3394 * For AP mode, hostapd is responsible for handling any action
3395 * frames that we didn't handle, including returning unknown
3396 * ones. For all other modes we will return them to the sender,
3397 * setting the 0x80 bit in the action category, as required by
3398 * 802.11-2012 9.24.4.
3399 * Newer versions of hostapd shall also use the management frame
3400 * registration mechanisms, but older ones still use cooked
3401 * monitor interfaces so push all frames there.
3403 if (!(status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
) &&
3404 (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
3405 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
3406 return RX_DROP_MONITOR
;
3408 if (is_multicast_ether_addr(mgmt
->da
))
3409 return RX_DROP_MONITOR
;
3411 /* do not return rejected action frames */
3412 if (mgmt
->u
.action
.category
& 0x80)
3413 return RX_DROP_UNUSABLE
;
3415 nskb
= skb_copy_expand(rx
->skb
, local
->hw
.extra_tx_headroom
, 0,
3418 struct ieee80211_mgmt
*nmgmt
= (void *)nskb
->data
;
3420 nmgmt
->u
.action
.category
|= 0x80;
3421 memcpy(nmgmt
->da
, nmgmt
->sa
, ETH_ALEN
);
3422 memcpy(nmgmt
->sa
, rx
->sdata
->vif
.addr
, ETH_ALEN
);
3424 memset(nskb
->cb
, 0, sizeof(nskb
->cb
));
3426 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
3427 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(nskb
);
3429 info
->flags
= IEEE80211_TX_CTL_TX_OFFCHAN
|
3430 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
|
3431 IEEE80211_TX_CTL_NO_CCK_RATE
;
3432 if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
3434 local
->hw
.offchannel_tx_hw_queue
;
3437 __ieee80211_tx_skb_tid_band(rx
->sdata
, nskb
, 7,
3440 dev_kfree_skb(rx
->skb
);
3444 static ieee80211_rx_result debug_noinline
3445 ieee80211_rx_h_mgmt(struct ieee80211_rx_data
*rx
)
3447 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3448 struct ieee80211_mgmt
*mgmt
= (void *)rx
->skb
->data
;
3451 stype
= mgmt
->frame_control
& cpu_to_le16(IEEE80211_FCTL_STYPE
);
3453 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
3454 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3455 sdata
->vif
.type
!= NL80211_IFTYPE_OCB
&&
3456 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3457 return RX_DROP_MONITOR
;
3460 case cpu_to_le16(IEEE80211_STYPE_AUTH
):
3461 case cpu_to_le16(IEEE80211_STYPE_BEACON
):
3462 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP
):
3463 /* process for all: mesh, mlme, ibss */
3465 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP
):
3466 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP
):
3467 case cpu_to_le16(IEEE80211_STYPE_DEAUTH
):
3468 case cpu_to_le16(IEEE80211_STYPE_DISASSOC
):
3469 if (is_multicast_ether_addr(mgmt
->da
) &&
3470 !is_broadcast_ether_addr(mgmt
->da
))
3471 return RX_DROP_MONITOR
;
3473 /* process only for station */
3474 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3475 return RX_DROP_MONITOR
;
3477 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
):
3478 /* process only for ibss and mesh */
3479 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3480 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
3481 return RX_DROP_MONITOR
;
3484 return RX_DROP_MONITOR
;
3487 /* queue up frame and kick off work to process it */
3488 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
3489 ieee80211_queue_work(&rx
->local
->hw
, &sdata
->work
);
3491 rx
->sta
->rx_stats
.packets
++;
3496 static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data
*rx
,
3497 struct ieee80211_rate
*rate
)
3499 struct ieee80211_sub_if_data
*sdata
;
3500 struct ieee80211_local
*local
= rx
->local
;
3501 struct sk_buff
*skb
= rx
->skb
, *skb2
;
3502 struct net_device
*prev_dev
= NULL
;
3503 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3504 int needed_headroom
;
3507 * If cooked monitor has been processed already, then
3508 * don't do it again. If not, set the flag.
3510 if (rx
->flags
& IEEE80211_RX_CMNTR
)
3512 rx
->flags
|= IEEE80211_RX_CMNTR
;
3514 /* If there are no cooked monitor interfaces, just free the SKB */
3515 if (!local
->cooked_mntrs
)
3518 /* vendor data is long removed here */
3519 status
->flag
&= ~RX_FLAG_RADIOTAP_VENDOR_DATA
;
3520 /* room for the radiotap header based on driver features */
3521 needed_headroom
= ieee80211_rx_radiotap_hdrlen(local
, status
, skb
);
3523 if (skb_headroom(skb
) < needed_headroom
&&
3524 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
))
3527 /* prepend radiotap information */
3528 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, needed_headroom
,
3531 skb_reset_mac_header(skb
);
3532 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3533 skb
->pkt_type
= PACKET_OTHERHOST
;
3534 skb
->protocol
= htons(ETH_P_802_2
);
3536 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3537 if (!ieee80211_sdata_running(sdata
))
3540 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
||
3541 !(sdata
->u
.mntr
.flags
& MONITOR_FLAG_COOK_FRAMES
))
3545 skb2
= skb_clone(skb
, GFP_ATOMIC
);
3547 skb2
->dev
= prev_dev
;
3548 netif_receive_skb(skb2
);
3552 prev_dev
= sdata
->dev
;
3553 ieee80211_rx_stats(sdata
->dev
, skb
->len
);
3557 skb
->dev
= prev_dev
;
3558 netif_receive_skb(skb
);
3566 static void ieee80211_rx_handlers_result(struct ieee80211_rx_data
*rx
,
3567 ieee80211_rx_result res
)
3570 case RX_DROP_MONITOR
:
3571 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
3573 rx
->sta
->rx_stats
.dropped
++;
3576 struct ieee80211_rate
*rate
= NULL
;
3577 struct ieee80211_supported_band
*sband
;
3578 struct ieee80211_rx_status
*status
;
3580 status
= IEEE80211_SKB_RXCB((rx
->skb
));
3582 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3583 if (status
->encoding
== RX_ENC_LEGACY
)
3584 rate
= &sband
->bitrates
[status
->rate_idx
];
3586 ieee80211_rx_cooked_monitor(rx
, rate
);
3589 case RX_DROP_UNUSABLE
:
3590 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
3592 rx
->sta
->rx_stats
.dropped
++;
3593 dev_kfree_skb(rx
->skb
);
3596 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_queued
);
3601 static void ieee80211_rx_handlers(struct ieee80211_rx_data
*rx
,
3602 struct sk_buff_head
*frames
)
3604 ieee80211_rx_result res
= RX_DROP_MONITOR
;
3605 struct sk_buff
*skb
;
3607 #define CALL_RXH(rxh) \
3610 if (res != RX_CONTINUE) \
3614 /* Lock here to avoid hitting all of the data used in the RX
3615 * path (e.g. key data, station data, ...) concurrently when
3616 * a frame is released from the reorder buffer due to timeout
3617 * from the timer, potentially concurrently with RX from the
3620 spin_lock_bh(&rx
->local
->rx_path_lock
);
3622 while ((skb
= __skb_dequeue(frames
))) {
3624 * all the other fields are valid across frames
3625 * that belong to an aMPDU since they are on the
3626 * same TID from the same station
3630 CALL_RXH(ieee80211_rx_h_check_more_data
);
3631 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll
);
3632 CALL_RXH(ieee80211_rx_h_sta_process
);
3633 CALL_RXH(ieee80211_rx_h_decrypt
);
3634 CALL_RXH(ieee80211_rx_h_defragment
);
3635 CALL_RXH(ieee80211_rx_h_michael_mic_verify
);
3636 /* must be after MMIC verify so header is counted in MPDU mic */
3637 #ifdef CONFIG_MAC80211_MESH
3638 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
3639 CALL_RXH(ieee80211_rx_h_mesh_fwding
);
3641 CALL_RXH(ieee80211_rx_h_amsdu
);
3642 CALL_RXH(ieee80211_rx_h_data
);
3644 /* special treatment -- needs the queue */
3645 res
= ieee80211_rx_h_ctrl(rx
, frames
);
3646 if (res
!= RX_CONTINUE
)
3649 CALL_RXH(ieee80211_rx_h_mgmt_check
);
3650 CALL_RXH(ieee80211_rx_h_action
);
3651 CALL_RXH(ieee80211_rx_h_userspace_mgmt
);
3652 CALL_RXH(ieee80211_rx_h_action_return
);
3653 CALL_RXH(ieee80211_rx_h_mgmt
);
3656 ieee80211_rx_handlers_result(rx
, res
);
3661 spin_unlock_bh(&rx
->local
->rx_path_lock
);
3664 static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data
*rx
)
3666 struct sk_buff_head reorder_release
;
3667 ieee80211_rx_result res
= RX_DROP_MONITOR
;
3669 __skb_queue_head_init(&reorder_release
);
3671 #define CALL_RXH(rxh) \
3674 if (res != RX_CONTINUE) \
3678 CALL_RXH(ieee80211_rx_h_check_dup
);
3679 CALL_RXH(ieee80211_rx_h_check
);
3681 ieee80211_rx_reorder_ampdu(rx
, &reorder_release
);
3683 ieee80211_rx_handlers(rx
, &reorder_release
);
3687 ieee80211_rx_handlers_result(rx
, res
);
3693 * This function makes calls into the RX path, therefore
3694 * it has to be invoked under RCU read lock.
3696 void ieee80211_release_reorder_timeout(struct sta_info
*sta
, int tid
)
3698 struct sk_buff_head frames
;
3699 struct ieee80211_rx_data rx
= {
3701 .sdata
= sta
->sdata
,
3702 .local
= sta
->local
,
3703 /* This is OK -- must be QoS data frame */
3704 .security_idx
= tid
,
3706 .napi
= NULL
, /* must be NULL to not have races */
3708 struct tid_ampdu_rx
*tid_agg_rx
;
3710 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
3714 __skb_queue_head_init(&frames
);
3716 spin_lock(&tid_agg_rx
->reorder_lock
);
3717 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
3718 spin_unlock(&tid_agg_rx
->reorder_lock
);
3720 if (!skb_queue_empty(&frames
)) {
3721 struct ieee80211_event event
= {
3722 .type
= BA_FRAME_TIMEOUT
,
3724 .u
.ba
.sta
= &sta
->sta
,
3726 drv_event_callback(rx
.local
, rx
.sdata
, &event
);
3729 ieee80211_rx_handlers(&rx
, &frames
);
3732 void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta
*pubsta
, u8 tid
,
3733 u16 ssn
, u64 filtered
,
3736 struct sta_info
*sta
;
3737 struct tid_ampdu_rx
*tid_agg_rx
;
3738 struct sk_buff_head frames
;
3739 struct ieee80211_rx_data rx
= {
3740 /* This is OK -- must be QoS data frame */
3741 .security_idx
= tid
,
3746 if (WARN_ON(!pubsta
|| tid
>= IEEE80211_NUM_TIDS
))
3749 __skb_queue_head_init(&frames
);
3751 sta
= container_of(pubsta
, struct sta_info
, sta
);
3754 rx
.sdata
= sta
->sdata
;
3755 rx
.local
= sta
->local
;
3758 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
3762 spin_lock_bh(&tid_agg_rx
->reorder_lock
);
3764 if (received_mpdus
>= IEEE80211_SN_MODULO
>> 1) {
3767 /* release all frames in the reorder buffer */
3768 release
= (tid_agg_rx
->head_seq_num
+ tid_agg_rx
->buf_size
) %
3769 IEEE80211_SN_MODULO
;
3770 ieee80211_release_reorder_frames(sta
->sdata
, tid_agg_rx
,
3772 /* update ssn to match received ssn */
3773 tid_agg_rx
->head_seq_num
= ssn
;
3775 ieee80211_release_reorder_frames(sta
->sdata
, tid_agg_rx
, ssn
,
3779 /* handle the case that received ssn is behind the mac ssn.
3780 * it can be tid_agg_rx->buf_size behind and still be valid */
3781 diff
= (tid_agg_rx
->head_seq_num
- ssn
) & IEEE80211_SN_MASK
;
3782 if (diff
>= tid_agg_rx
->buf_size
) {
3783 tid_agg_rx
->reorder_buf_filtered
= 0;
3786 filtered
= filtered
>> diff
;
3790 for (i
= 0; i
< tid_agg_rx
->buf_size
; i
++) {
3791 int index
= (ssn
+ i
) % tid_agg_rx
->buf_size
;
3793 tid_agg_rx
->reorder_buf_filtered
&= ~BIT_ULL(index
);
3794 if (filtered
& BIT_ULL(i
))
3795 tid_agg_rx
->reorder_buf_filtered
|= BIT_ULL(index
);
3798 /* now process also frames that the filter marking released */
3799 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
3802 spin_unlock_bh(&tid_agg_rx
->reorder_lock
);
3804 ieee80211_rx_handlers(&rx
, &frames
);
3809 EXPORT_SYMBOL(ieee80211_mark_rx_ba_filtered_frames
);
3811 /* main receive path */
3813 static bool ieee80211_accept_frame(struct ieee80211_rx_data
*rx
)
3815 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3816 struct sk_buff
*skb
= rx
->skb
;
3817 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
3818 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3819 u8
*bssid
= ieee80211_get_bssid(hdr
, skb
->len
, sdata
->vif
.type
);
3820 bool multicast
= is_multicast_ether_addr(hdr
->addr1
);
3822 switch (sdata
->vif
.type
) {
3823 case NL80211_IFTYPE_STATION
:
3824 if (!bssid
&& !sdata
->u
.mgd
.use_4addr
)
3828 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
3829 case NL80211_IFTYPE_ADHOC
:
3832 if (ether_addr_equal(sdata
->vif
.addr
, hdr
->addr2
) ||
3833 ether_addr_equal(sdata
->u
.ibss
.bssid
, hdr
->addr2
))
3835 if (ieee80211_is_beacon(hdr
->frame_control
))
3837 if (!ieee80211_bssid_match(bssid
, sdata
->u
.ibss
.bssid
))
3840 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
3844 if (status
->encoding
!= RX_ENC_LEGACY
)
3845 rate_idx
= 0; /* TODO: HT/VHT rates */
3847 rate_idx
= status
->rate_idx
;
3848 ieee80211_ibss_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
3852 case NL80211_IFTYPE_OCB
:
3855 if (!ieee80211_is_data_present(hdr
->frame_control
))
3857 if (!is_broadcast_ether_addr(bssid
))
3860 !ether_addr_equal(sdata
->dev
->dev_addr
, hdr
->addr1
))
3864 if (status
->encoding
!= RX_ENC_LEGACY
)
3865 rate_idx
= 0; /* TODO: HT rates */
3867 rate_idx
= status
->rate_idx
;
3868 ieee80211_ocb_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
3872 case NL80211_IFTYPE_MESH_POINT
:
3873 if (ether_addr_equal(sdata
->vif
.addr
, hdr
->addr2
))
3877 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
3878 case NL80211_IFTYPE_AP_VLAN
:
3879 case NL80211_IFTYPE_AP
:
3881 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
3883 if (!ieee80211_bssid_match(bssid
, sdata
->vif
.addr
)) {
3885 * Accept public action frames even when the
3886 * BSSID doesn't match, this is used for P2P
3887 * and location updates. Note that mac80211
3888 * itself never looks at these frames.
3891 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
3893 if (ieee80211_is_public_action(hdr
, skb
->len
))
3895 return ieee80211_is_beacon(hdr
->frame_control
);
3898 if (!ieee80211_has_tods(hdr
->frame_control
)) {
3899 /* ignore data frames to TDLS-peers */
3900 if (ieee80211_is_data(hdr
->frame_control
))
3902 /* ignore action frames to TDLS-peers */
3903 if (ieee80211_is_action(hdr
->frame_control
) &&
3904 !is_broadcast_ether_addr(bssid
) &&
3905 !ether_addr_equal(bssid
, hdr
->addr1
))
3910 * 802.11-2016 Table 9-26 says that for data frames, A1 must be
3911 * the BSSID - we've checked that already but may have accepted
3912 * the wildcard (ff:ff:ff:ff:ff:ff).
3915 * The BSSID of the Data frame is determined as follows:
3916 * a) If the STA is contained within an AP or is associated
3917 * with an AP, the BSSID is the address currently in use
3918 * by the STA contained in the AP.
3920 * So we should not accept data frames with an address that's
3923 * Accepting it also opens a security problem because stations
3924 * could encrypt it with the GTK and inject traffic that way.
3926 if (ieee80211_is_data(hdr
->frame_control
) && multicast
)
3930 case NL80211_IFTYPE_WDS
:
3931 if (bssid
|| !ieee80211_is_data(hdr
->frame_control
))
3933 return ether_addr_equal(sdata
->u
.wds
.remote_addr
, hdr
->addr2
);
3934 case NL80211_IFTYPE_P2P_DEVICE
:
3935 return ieee80211_is_public_action(hdr
, skb
->len
) ||
3936 ieee80211_is_probe_req(hdr
->frame_control
) ||
3937 ieee80211_is_probe_resp(hdr
->frame_control
) ||
3938 ieee80211_is_beacon(hdr
->frame_control
);
3939 case NL80211_IFTYPE_NAN
:
3940 /* Currently no frames on NAN interface are allowed */
3950 void ieee80211_check_fast_rx(struct sta_info
*sta
)
3952 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
3953 struct ieee80211_local
*local
= sdata
->local
;
3954 struct ieee80211_key
*key
;
3955 struct ieee80211_fast_rx fastrx
= {
3957 .vif_type
= sdata
->vif
.type
,
3958 .control_port_protocol
= sdata
->control_port_protocol
,
3959 }, *old
, *new = NULL
;
3960 bool assign
= false;
3962 /* use sparse to check that we don't return without updating */
3963 __acquire(check_fast_rx
);
3965 BUILD_BUG_ON(sizeof(fastrx
.rfc1042_hdr
) != sizeof(rfc1042_header
));
3966 BUILD_BUG_ON(sizeof(fastrx
.rfc1042_hdr
) != ETH_ALEN
);
3967 ether_addr_copy(fastrx
.rfc1042_hdr
, rfc1042_header
);
3968 ether_addr_copy(fastrx
.vif_addr
, sdata
->vif
.addr
);
3970 fastrx
.uses_rss
= ieee80211_hw_check(&local
->hw
, USES_RSS
);
3972 /* fast-rx doesn't do reordering */
3973 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
) &&
3974 !ieee80211_hw_check(&local
->hw
, SUPPORTS_REORDERING_BUFFER
))
3977 switch (sdata
->vif
.type
) {
3978 case NL80211_IFTYPE_STATION
:
3979 if (sta
->sta
.tdls
) {
3980 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
3981 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
3982 fastrx
.expected_ds_bits
= 0;
3984 fastrx
.sta_notify
= sdata
->u
.mgd
.probe_send_count
> 0;
3985 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
3986 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr3
);
3987 fastrx
.expected_ds_bits
=
3988 cpu_to_le16(IEEE80211_FCTL_FROMDS
);
3991 if (sdata
->u
.mgd
.use_4addr
&& !sta
->sta
.tdls
) {
3992 fastrx
.expected_ds_bits
|=
3993 cpu_to_le16(IEEE80211_FCTL_TODS
);
3994 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
3995 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
3998 if (!sdata
->u
.mgd
.powersave
)
4001 /* software powersave is a huge mess, avoid all of it */
4002 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
))
4004 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
) &&
4005 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
))
4008 case NL80211_IFTYPE_AP_VLAN
:
4009 case NL80211_IFTYPE_AP
:
4010 /* parallel-rx requires this, at least with calls to
4011 * ieee80211_sta_ps_transition()
4013 if (!ieee80211_hw_check(&local
->hw
, AP_LINK_PS
))
4015 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4016 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
4017 fastrx
.expected_ds_bits
= cpu_to_le16(IEEE80211_FCTL_TODS
);
4019 fastrx
.internal_forward
=
4020 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
4021 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
||
4022 !sdata
->u
.vlan
.sta
);
4024 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
4025 sdata
->u
.vlan
.sta
) {
4026 fastrx
.expected_ds_bits
|=
4027 cpu_to_le16(IEEE80211_FCTL_FROMDS
);
4028 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
4029 fastrx
.internal_forward
= 0;
4037 if (!test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
4041 key
= rcu_dereference(sta
->ptk
[sta
->ptk_idx
]);
4043 switch (key
->conf
.cipher
) {
4044 case WLAN_CIPHER_SUITE_TKIP
:
4045 /* we don't want to deal with MMIC in fast-rx */
4047 case WLAN_CIPHER_SUITE_CCMP
:
4048 case WLAN_CIPHER_SUITE_CCMP_256
:
4049 case WLAN_CIPHER_SUITE_GCMP
:
4050 case WLAN_CIPHER_SUITE_GCMP_256
:
4053 /* We also don't want to deal with
4054 * WEP or cipher scheme.
4060 fastrx
.icv_len
= key
->conf
.icv_len
;
4067 __release(check_fast_rx
);
4070 new = kmemdup(&fastrx
, sizeof(fastrx
), GFP_KERNEL
);
4072 spin_lock_bh(&sta
->lock
);
4073 old
= rcu_dereference_protected(sta
->fast_rx
, true);
4074 rcu_assign_pointer(sta
->fast_rx
, new);
4075 spin_unlock_bh(&sta
->lock
);
4078 kfree_rcu(old
, rcu_head
);
4081 void ieee80211_clear_fast_rx(struct sta_info
*sta
)
4083 struct ieee80211_fast_rx
*old
;
4085 spin_lock_bh(&sta
->lock
);
4086 old
= rcu_dereference_protected(sta
->fast_rx
, true);
4087 RCU_INIT_POINTER(sta
->fast_rx
, NULL
);
4088 spin_unlock_bh(&sta
->lock
);
4091 kfree_rcu(old
, rcu_head
);
4094 void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data
*sdata
)
4096 struct ieee80211_local
*local
= sdata
->local
;
4097 struct sta_info
*sta
;
4099 lockdep_assert_held(&local
->sta_mtx
);
4101 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
4102 if (sdata
!= sta
->sdata
&&
4103 (!sta
->sdata
->bss
|| sta
->sdata
->bss
!= sdata
->bss
))
4105 ieee80211_check_fast_rx(sta
);
4109 void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data
*sdata
)
4111 struct ieee80211_local
*local
= sdata
->local
;
4113 mutex_lock(&local
->sta_mtx
);
4114 __ieee80211_check_fast_rx_iface(sdata
);
4115 mutex_unlock(&local
->sta_mtx
);
4118 static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data
*rx
,
4119 struct ieee80211_fast_rx
*fast_rx
)
4121 struct sk_buff
*skb
= rx
->skb
;
4122 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
4123 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
4124 struct sta_info
*sta
= rx
->sta
;
4125 int orig_len
= skb
->len
;
4126 int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
4127 int snap_offs
= hdrlen
;
4129 u8 snap
[sizeof(rfc1042_header
)];
4131 } *payload
__aligned(2);
4135 } addrs
__aligned(2);
4136 struct ieee80211_sta_rx_stats
*stats
= &sta
->rx_stats
;
4138 if (fast_rx
->uses_rss
)
4139 stats
= this_cpu_ptr(sta
->pcpu_rx_stats
);
4141 /* for parallel-rx, we need to have DUP_VALIDATED, otherwise we write
4142 * to a common data structure; drivers can implement that per queue
4143 * but we don't have that information in mac80211
4145 if (!(status
->flag
& RX_FLAG_DUP_VALIDATED
))
4148 #define FAST_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED)
4150 /* If using encryption, we also need to have:
4151 * - PN_VALIDATED: similar, but the implementation is tricky
4152 * - DECRYPTED: necessary for PN_VALIDATED
4155 (status
->flag
& FAST_RX_CRYPT_FLAGS
) != FAST_RX_CRYPT_FLAGS
)
4158 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
4161 if (unlikely(ieee80211_is_frag(hdr
)))
4164 /* Since our interface address cannot be multicast, this
4165 * implicitly also rejects multicast frames without the
4168 * We shouldn't get any *data* frames not addressed to us
4169 * (AP mode will accept multicast *management* frames), but
4170 * punting here will make it go through the full checks in
4171 * ieee80211_accept_frame().
4173 if (!ether_addr_equal(fast_rx
->vif_addr
, hdr
->addr1
))
4176 if ((hdr
->frame_control
& cpu_to_le16(IEEE80211_FCTL_FROMDS
|
4177 IEEE80211_FCTL_TODS
)) !=
4178 fast_rx
->expected_ds_bits
)
4181 /* assign the key to drop unencrypted frames (later)
4182 * and strip the IV/MIC if necessary
4184 if (fast_rx
->key
&& !(status
->flag
& RX_FLAG_IV_STRIPPED
)) {
4185 /* GCMP header length is the same */
4186 snap_offs
+= IEEE80211_CCMP_HDR_LEN
;
4189 if (!(status
->rx_flags
& IEEE80211_RX_AMSDU
)) {
4190 if (!pskb_may_pull(skb
, snap_offs
+ sizeof(*payload
)))
4193 payload
= (void *)(skb
->data
+ snap_offs
);
4195 if (!ether_addr_equal(payload
->snap
, fast_rx
->rfc1042_hdr
))
4198 /* Don't handle these here since they require special code.
4199 * Accept AARP and IPX even though they should come with a
4200 * bridge-tunnel header - but if we get them this way then
4201 * there's little point in discarding them.
4203 if (unlikely(payload
->proto
== cpu_to_be16(ETH_P_TDLS
) ||
4204 payload
->proto
== fast_rx
->control_port_protocol
))
4208 /* after this point, don't punt to the slowpath! */
4210 if (rx
->key
&& !(status
->flag
& RX_FLAG_MIC_STRIPPED
) &&
4211 pskb_trim(skb
, skb
->len
- fast_rx
->icv_len
))
4214 if (unlikely(fast_rx
->sta_notify
)) {
4215 ieee80211_sta_rx_notify(rx
->sdata
, hdr
);
4216 fast_rx
->sta_notify
= false;
4219 /* statistics part of ieee80211_rx_h_sta_process() */
4220 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
4221 stats
->last_signal
= status
->signal
;
4222 if (!fast_rx
->uses_rss
)
4223 ewma_signal_add(&sta
->rx_stats_avg
.signal
,
4227 if (status
->chains
) {
4230 stats
->chains
= status
->chains
;
4231 for (i
= 0; i
< ARRAY_SIZE(status
->chain_signal
); i
++) {
4232 int signal
= status
->chain_signal
[i
];
4234 if (!(status
->chains
& BIT(i
)))
4237 stats
->chain_signal_last
[i
] = signal
;
4238 if (!fast_rx
->uses_rss
)
4239 ewma_signal_add(&sta
->rx_stats_avg
.chain_signal
[i
],
4243 /* end of statistics */
4245 if (rx
->key
&& !ieee80211_has_protected(hdr
->frame_control
))
4248 if (status
->rx_flags
& IEEE80211_RX_AMSDU
) {
4249 if (__ieee80211_rx_h_amsdu(rx
, snap_offs
- hdrlen
) !=
4256 stats
->last_rx
= jiffies
;
4257 stats
->last_rate
= sta_stats_encode_rate(status
);
4262 /* do the header conversion - first grab the addresses */
4263 ether_addr_copy(addrs
.da
, skb
->data
+ fast_rx
->da_offs
);
4264 ether_addr_copy(addrs
.sa
, skb
->data
+ fast_rx
->sa_offs
);
4265 /* remove the SNAP but leave the ethertype */
4266 skb_pull(skb
, snap_offs
+ sizeof(rfc1042_header
));
4267 /* push the addresses in front */
4268 memcpy(skb_push(skb
, sizeof(addrs
)), &addrs
, sizeof(addrs
));
4270 skb
->dev
= fast_rx
->dev
;
4272 ieee80211_rx_stats(fast_rx
->dev
, skb
->len
);
4274 /* The seqno index has the same property as needed
4275 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
4276 * for non-QoS-data frames. Here we know it's a data
4277 * frame, so count MSDUs.
4279 u64_stats_update_begin(&stats
->syncp
);
4280 stats
->msdu
[rx
->seqno_idx
]++;
4281 stats
->bytes
+= orig_len
;
4282 u64_stats_update_end(&stats
->syncp
);
4284 if (fast_rx
->internal_forward
) {
4285 struct sk_buff
*xmit_skb
= NULL
;
4286 if (is_multicast_ether_addr(addrs
.da
)) {
4287 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
4288 } else if (!ether_addr_equal(addrs
.da
, addrs
.sa
) &&
4289 sta_info_get(rx
->sdata
, addrs
.da
)) {
4296 * Send to wireless media and increase priority by 256
4297 * to keep the received priority instead of
4298 * reclassifying the frame (see cfg80211_classify8021d).
4300 xmit_skb
->priority
+= 256;
4301 xmit_skb
->protocol
= htons(ETH_P_802_3
);
4302 skb_reset_network_header(xmit_skb
);
4303 skb_reset_mac_header(xmit_skb
);
4304 dev_queue_xmit(xmit_skb
);
4311 /* deliver to local stack */
4312 skb
->protocol
= eth_type_trans(skb
, fast_rx
->dev
);
4313 memset(skb
->cb
, 0, sizeof(skb
->cb
));
4315 napi_gro_receive(rx
->napi
, skb
);
4317 netif_receive_skb(skb
);
4327 * This function returns whether or not the SKB
4328 * was destined for RX processing or not, which,
4329 * if consume is true, is equivalent to whether
4330 * or not the skb was consumed.
4332 static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data
*rx
,
4333 struct sk_buff
*skb
, bool consume
)
4335 struct ieee80211_local
*local
= rx
->local
;
4336 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
4340 /* See if we can do fast-rx; if we have to copy we already lost,
4341 * so punt in that case. We should never have to deliver a data
4342 * frame to multiple interfaces anyway.
4344 * We skip the ieee80211_accept_frame() call and do the necessary
4345 * checking inside ieee80211_invoke_fast_rx().
4347 if (consume
&& rx
->sta
) {
4348 struct ieee80211_fast_rx
*fast_rx
;
4350 fast_rx
= rcu_dereference(rx
->sta
->fast_rx
);
4351 if (fast_rx
&& ieee80211_invoke_fast_rx(rx
, fast_rx
))
4355 if (!ieee80211_accept_frame(rx
))
4359 skb
= skb_copy(skb
, GFP_ATOMIC
);
4361 if (net_ratelimit())
4362 wiphy_debug(local
->hw
.wiphy
,
4363 "failed to copy skb for %s\n",
4371 ieee80211_invoke_rx_handlers(rx
);
4376 * This is the actual Rx frames handler. as it belongs to Rx path it must
4377 * be called with rcu_read_lock protection.
4379 static void __ieee80211_rx_handle_packet(struct ieee80211_hw
*hw
,
4380 struct ieee80211_sta
*pubsta
,
4381 struct sk_buff
*skb
,
4382 struct napi_struct
*napi
)
4384 struct ieee80211_local
*local
= hw_to_local(hw
);
4385 struct ieee80211_sub_if_data
*sdata
;
4386 struct ieee80211_hdr
*hdr
;
4388 struct ieee80211_rx_data rx
;
4389 struct ieee80211_sub_if_data
*prev
;
4390 struct rhlist_head
*tmp
;
4393 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
4394 memset(&rx
, 0, sizeof(rx
));
4399 if (ieee80211_is_data(fc
) || ieee80211_is_mgmt(fc
))
4400 I802_DEBUG_INC(local
->dot11ReceivedFragmentCount
);
4402 if (ieee80211_is_mgmt(fc
)) {
4403 /* drop frame if too short for header */
4404 if (skb
->len
< ieee80211_hdrlen(fc
))
4407 err
= skb_linearize(skb
);
4409 err
= !pskb_may_pull(skb
, ieee80211_hdrlen(fc
));
4417 hdr
= (struct ieee80211_hdr
*)skb
->data
;
4418 ieee80211_parse_qos(&rx
);
4419 ieee80211_verify_alignment(&rx
);
4421 if (unlikely(ieee80211_is_probe_resp(hdr
->frame_control
) ||
4422 ieee80211_is_beacon(hdr
->frame_control
)))
4423 ieee80211_scan_rx(local
, skb
);
4425 if (ieee80211_is_data(fc
)) {
4426 struct sta_info
*sta
, *prev_sta
;
4429 rx
.sta
= container_of(pubsta
, struct sta_info
, sta
);
4430 rx
.sdata
= rx
.sta
->sdata
;
4431 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
4438 for_each_sta_info(local
, hdr
->addr2
, sta
, tmp
) {
4445 rx
.sdata
= prev_sta
->sdata
;
4446 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
4453 rx
.sdata
= prev_sta
->sdata
;
4455 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
4463 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4464 if (!ieee80211_sdata_running(sdata
))
4467 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
4468 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
4472 * frame is destined for this interface, but if it's
4473 * not also for the previous one we handle that after
4474 * the loop to avoid copying the SKB once too much
4482 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
4484 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
4490 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
4493 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
4502 * This is the receive path handler. It is called by a low level driver when an
4503 * 802.11 MPDU is received from the hardware.
4505 void ieee80211_rx_napi(struct ieee80211_hw
*hw
, struct ieee80211_sta
*pubsta
,
4506 struct sk_buff
*skb
, struct napi_struct
*napi
)
4508 struct ieee80211_local
*local
= hw_to_local(hw
);
4509 struct ieee80211_rate
*rate
= NULL
;
4510 struct ieee80211_supported_band
*sband
;
4511 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
4513 WARN_ON_ONCE(softirq_count() == 0);
4515 if (WARN_ON(status
->band
>= NUM_NL80211_BANDS
))
4518 sband
= local
->hw
.wiphy
->bands
[status
->band
];
4519 if (WARN_ON(!sband
))
4523 * If we're suspending, it is possible although not too likely
4524 * that we'd be receiving frames after having already partially
4525 * quiesced the stack. We can't process such frames then since
4526 * that might, for example, cause stations to be added or other
4527 * driver callbacks be invoked.
4529 if (unlikely(local
->quiescing
|| local
->suspended
))
4532 /* We might be during a HW reconfig, prevent Rx for the same reason */
4533 if (unlikely(local
->in_reconfig
))
4537 * The same happens when we're not even started,
4538 * but that's worth a warning.
4540 if (WARN_ON(!local
->started
))
4543 if (likely(!(status
->flag
& RX_FLAG_FAILED_PLCP_CRC
))) {
4545 * Validate the rate, unless a PLCP error means that
4546 * we probably can't have a valid rate here anyway.
4549 switch (status
->encoding
) {
4552 * rate_idx is MCS index, which can be [0-76]
4555 * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
4557 * Anything else would be some sort of driver or
4558 * hardware error. The driver should catch hardware
4561 if (WARN(status
->rate_idx
> 76,
4562 "Rate marked as an HT rate but passed "
4563 "status->rate_idx is not "
4564 "an MCS index [0-76]: %d (0x%02x)\n",
4570 if (WARN_ONCE(status
->rate_idx
> 9 ||
4573 "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
4574 status
->rate_idx
, status
->nss
))
4578 if (WARN_ONCE(status
->rate_idx
> 11 ||
4581 "Rate marked as an HE rate but data is invalid: MCS: %d, NSS: %d\n",
4582 status
->rate_idx
, status
->nss
))
4589 if (WARN_ON(status
->rate_idx
>= sband
->n_bitrates
))
4591 rate
= &sband
->bitrates
[status
->rate_idx
];
4595 status
->rx_flags
= 0;
4598 * key references and virtual interfaces are protected using RCU
4599 * and this requires that we are in a read-side RCU section during
4600 * receive processing
4605 * Frames with failed FCS/PLCP checksum are not returned,
4606 * all other frames are returned without radiotap header
4607 * if it was previously present.
4608 * Also, frames with less than 16 bytes are dropped.
4610 skb
= ieee80211_rx_monitor(local
, skb
, rate
);
4616 ieee80211_tpt_led_trig_rx(local
,
4617 ((struct ieee80211_hdr
*)skb
->data
)->frame_control
,
4620 __ieee80211_rx_handle_packet(hw
, pubsta
, skb
, napi
);
4628 EXPORT_SYMBOL(ieee80211_rx_napi
);
4630 /* This is a version of the rx handler that can be called from hard irq
4631 * context. Post the skb on the queue and schedule the tasklet */
4632 void ieee80211_rx_irqsafe(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
4634 struct ieee80211_local
*local
= hw_to_local(hw
);
4636 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status
) > sizeof(skb
->cb
));
4638 skb
->pkt_type
= IEEE80211_RX_MSG
;
4639 skb_queue_tail(&local
->skb_queue
, skb
);
4640 tasklet_schedule(&local
->tasklet
);
4642 EXPORT_SYMBOL(ieee80211_rx_irqsafe
);