1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
9 * Copyright (C) 2018-2023 Intel Corporation
12 #include <linux/jiffies.h>
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/skbuff.h>
16 #include <linux/netdevice.h>
17 #include <linux/etherdevice.h>
18 #include <linux/rcupdate.h>
19 #include <linux/export.h>
20 #include <linux/kcov.h>
21 #include <linux/bitops.h>
22 #include <net/mac80211.h>
23 #include <net/ieee80211_radiotap.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
37 * monitor mode reception
39 * This function cleans up the SKB, i.e. it removes all the stuff
40 * only useful for monitoring.
42 static struct sk_buff
*ieee80211_clean_skb(struct sk_buff
*skb
,
43 unsigned int present_fcs_len
,
44 unsigned int rtap_space
)
46 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
47 struct ieee80211_hdr
*hdr
;
52 __pskb_trim(skb
, skb
->len
- present_fcs_len
);
53 pskb_pull(skb
, rtap_space
);
55 /* After pulling radiotap header, clear all flags that indicate
58 status
->flag
&= ~(RX_FLAG_RADIOTAP_TLV_AT_END
|
59 RX_FLAG_RADIOTAP_LSIG
|
60 RX_FLAG_RADIOTAP_HE_MU
|
63 hdr
= (void *)skb
->data
;
64 fc
= hdr
->frame_control
;
67 * Remove the HT-Control field (if present) on management
68 * frames after we've sent the frame to monitoring. We
69 * (currently) don't need it, and don't properly parse
70 * frames with it present, due to the assumption of a
71 * fixed management header length.
73 if (likely(!ieee80211_is_mgmt(fc
) || !ieee80211_has_order(fc
)))
76 hdrlen
= ieee80211_hdrlen(fc
);
77 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_ORDER
);
79 if (!pskb_may_pull(skb
, hdrlen
)) {
84 memmove(skb
->data
+ IEEE80211_HT_CTL_LEN
, skb
->data
,
85 hdrlen
- IEEE80211_HT_CTL_LEN
);
86 pskb_pull(skb
, IEEE80211_HT_CTL_LEN
);
91 static inline bool should_drop_frame(struct sk_buff
*skb
, int present_fcs_len
,
92 unsigned int rtap_space
)
94 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
95 struct ieee80211_hdr
*hdr
;
97 hdr
= (void *)(skb
->data
+ rtap_space
);
99 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
|
100 RX_FLAG_FAILED_PLCP_CRC
|
101 RX_FLAG_ONLY_MONITOR
|
105 if (unlikely(skb
->len
< 16 + present_fcs_len
+ rtap_space
))
108 if (ieee80211_is_ctl(hdr
->frame_control
) &&
109 !ieee80211_is_pspoll(hdr
->frame_control
) &&
110 !ieee80211_is_back_req(hdr
->frame_control
))
117 ieee80211_rx_radiotap_hdrlen(struct ieee80211_local
*local
,
118 struct ieee80211_rx_status
*status
,
123 /* always present fields */
124 len
= sizeof(struct ieee80211_radiotap_header
) + 8;
126 /* allocate extra bitmaps */
128 len
+= 4 * hweight8(status
->chains
);
130 if (ieee80211_have_rx_timestamp(status
)) {
134 if (ieee80211_hw_check(&local
->hw
, SIGNAL_DBM
))
137 /* antenna field, if we don't have per-chain info */
141 /* padding for RX_FLAGS if necessary */
144 if (status
->encoding
== RX_ENC_HT
) /* HT info */
147 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
152 if (status
->encoding
== RX_ENC_VHT
) {
157 if (local
->hw
.radiotap_timestamp
.units_pos
>= 0) {
162 if (status
->encoding
== RX_ENC_HE
&&
163 status
->flag
& RX_FLAG_RADIOTAP_HE
) {
166 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he
) != 12);
169 if (status
->encoding
== RX_ENC_HE
&&
170 status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
173 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu
) != 12);
176 if (status
->flag
& RX_FLAG_NO_PSDU
)
179 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
182 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig
) != 4);
185 if (status
->chains
) {
186 /* antenna and antenna signal fields */
187 len
+= 2 * hweight8(status
->chains
);
190 if (status
->flag
& RX_FLAG_RADIOTAP_TLV_AT_END
) {
194 * The position to look at depends on the existence (or non-
195 * existence) of other elements, so take that into account...
197 if (status
->flag
& RX_FLAG_RADIOTAP_HE
)
199 sizeof(struct ieee80211_radiotap_he
);
200 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
)
202 sizeof(struct ieee80211_radiotap_he_mu
);
203 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
)
205 sizeof(struct ieee80211_radiotap_lsig
);
207 /* ensure 4 byte alignment for TLV */
210 /* TLVs until the mac header */
211 len
+= skb_mac_header(skb
) - &skb
->data
[tlv_offset
];
217 static void __ieee80211_queue_skb_to_iface(struct ieee80211_sub_if_data
*sdata
,
219 struct sta_info
*sta
,
222 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
225 status
->link_valid
= 1;
226 status
->link_id
= link_id
;
228 status
->link_valid
= 0;
231 skb_queue_tail(&sdata
->skb_queue
, skb
);
232 wiphy_work_queue(sdata
->local
->hw
.wiphy
, &sdata
->work
);
234 sta
->deflink
.rx_stats
.packets
++;
237 static void ieee80211_queue_skb_to_iface(struct ieee80211_sub_if_data
*sdata
,
239 struct sta_info
*sta
,
243 __ieee80211_queue_skb_to_iface(sdata
, link_id
, sta
, skb
);
246 static void ieee80211_handle_mu_mimo_mon(struct ieee80211_sub_if_data
*sdata
,
251 struct ieee80211_hdr_3addr hdr
;
254 } __packed
__aligned(2) action
;
259 BUILD_BUG_ON(sizeof(action
) != IEEE80211_MIN_ACTION_SIZE
+ 1);
261 if (skb
->len
< rtap_space
+ sizeof(action
) +
262 VHT_MUMIMO_GROUPS_DATA_LEN
)
265 if (!is_valid_ether_addr(sdata
->u
.mntr
.mu_follow_addr
))
268 skb_copy_bits(skb
, rtap_space
, &action
, sizeof(action
));
270 if (!ieee80211_is_action(action
.hdr
.frame_control
))
273 if (action
.category
!= WLAN_CATEGORY_VHT
)
276 if (action
.action_code
!= WLAN_VHT_ACTION_GROUPID_MGMT
)
279 if (!ether_addr_equal(action
.hdr
.addr1
, sdata
->u
.mntr
.mu_follow_addr
))
282 skb
= skb_copy(skb
, GFP_ATOMIC
);
286 ieee80211_queue_skb_to_iface(sdata
, -1, NULL
, skb
);
290 * ieee80211_add_rx_radiotap_header - add radiotap header
292 * add a radiotap header containing all the fields which the hardware provided.
295 ieee80211_add_rx_radiotap_header(struct ieee80211_local
*local
,
297 struct ieee80211_rate
*rate
,
298 int rtap_len
, bool has_fcs
)
300 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
301 struct ieee80211_radiotap_header
*rthdr
;
306 u16 channel_flags
= 0;
309 unsigned long chains
= status
->chains
;
310 struct ieee80211_radiotap_he he
= {};
311 struct ieee80211_radiotap_he_mu he_mu
= {};
312 struct ieee80211_radiotap_lsig lsig
= {};
314 if (status
->flag
& RX_FLAG_RADIOTAP_HE
) {
315 he
= *(struct ieee80211_radiotap_he
*)skb
->data
;
316 skb_pull(skb
, sizeof(he
));
317 WARN_ON_ONCE(status
->encoding
!= RX_ENC_HE
);
320 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
321 he_mu
= *(struct ieee80211_radiotap_he_mu
*)skb
->data
;
322 skb_pull(skb
, sizeof(he_mu
));
325 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
326 lsig
= *(struct ieee80211_radiotap_lsig
*)skb
->data
;
327 skb_pull(skb
, sizeof(lsig
));
330 if (status
->flag
& RX_FLAG_RADIOTAP_TLV_AT_END
) {
331 /* data is pointer at tlv all other info was pulled off */
332 tlvs_len
= skb_mac_header(skb
) - skb
->data
;
336 if (!(has_fcs
&& ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
)))
339 rthdr
= skb_push(skb
, rtap_len
- tlvs_len
);
340 memset(rthdr
, 0, rtap_len
- tlvs_len
);
341 it_present
= &rthdr
->it_present
;
343 /* radiotap header, set always present flags */
344 rthdr
->it_len
= cpu_to_le16(rtap_len
);
345 it_present_val
= BIT(IEEE80211_RADIOTAP_FLAGS
) |
346 BIT(IEEE80211_RADIOTAP_CHANNEL
) |
347 BIT(IEEE80211_RADIOTAP_RX_FLAGS
);
350 it_present_val
|= BIT(IEEE80211_RADIOTAP_ANTENNA
);
352 for_each_set_bit(chain
, &chains
, IEEE80211_MAX_CHAINS
) {
354 BIT(IEEE80211_RADIOTAP_EXT
) |
355 BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE
);
356 put_unaligned_le32(it_present_val
, it_present
);
358 it_present_val
= BIT(IEEE80211_RADIOTAP_ANTENNA
) |
359 BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL
);
362 if (status
->flag
& RX_FLAG_RADIOTAP_TLV_AT_END
)
363 it_present_val
|= BIT(IEEE80211_RADIOTAP_TLV
);
365 put_unaligned_le32(it_present_val
, it_present
);
367 /* This references through an offset into it_optional[] rather
368 * than via it_present otherwise later uses of pos will cause
369 * the compiler to think we have walked past the end of the
372 pos
= (void *)&rthdr
->it_optional
[it_present
+ 1 - rthdr
->it_optional
];
374 /* the order of the following fields is important */
376 /* IEEE80211_RADIOTAP_TSFT */
377 if (ieee80211_have_rx_timestamp(status
)) {
379 while ((pos
- (u8
*)rthdr
) & 7)
382 ieee80211_calculate_rx_timestamp(local
, status
,
385 rthdr
->it_present
|= cpu_to_le32(BIT(IEEE80211_RADIOTAP_TSFT
));
389 /* IEEE80211_RADIOTAP_FLAGS */
390 if (has_fcs
&& ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
))
391 *pos
|= IEEE80211_RADIOTAP_F_FCS
;
392 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
| RX_FLAG_FAILED_PLCP_CRC
))
393 *pos
|= IEEE80211_RADIOTAP_F_BADFCS
;
394 if (status
->enc_flags
& RX_ENC_FLAG_SHORTPRE
)
395 *pos
|= IEEE80211_RADIOTAP_F_SHORTPRE
;
398 /* IEEE80211_RADIOTAP_RATE */
399 if (!rate
|| status
->encoding
!= RX_ENC_LEGACY
) {
401 * Without rate information don't add it. If we have,
402 * MCS information is a separate field in radiotap,
403 * added below. The byte here is needed as padding
404 * for the channel though, so initialise it to 0.
409 rthdr
->it_present
|= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE
));
410 if (status
->bw
== RATE_INFO_BW_10
)
412 else if (status
->bw
== RATE_INFO_BW_5
)
414 *pos
= DIV_ROUND_UP(rate
->bitrate
, 5 * (1 << shift
));
418 /* IEEE80211_RADIOTAP_CHANNEL */
419 /* TODO: frequency offset in KHz */
420 put_unaligned_le16(status
->freq
, pos
);
422 if (status
->bw
== RATE_INFO_BW_10
)
423 channel_flags
|= IEEE80211_CHAN_HALF
;
424 else if (status
->bw
== RATE_INFO_BW_5
)
425 channel_flags
|= IEEE80211_CHAN_QUARTER
;
427 if (status
->band
== NL80211_BAND_5GHZ
||
428 status
->band
== NL80211_BAND_6GHZ
)
429 channel_flags
|= IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_5GHZ
;
430 else if (status
->encoding
!= RX_ENC_LEGACY
)
431 channel_flags
|= IEEE80211_CHAN_DYN
| IEEE80211_CHAN_2GHZ
;
432 else if (rate
&& rate
->flags
& IEEE80211_RATE_ERP_G
)
433 channel_flags
|= IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_2GHZ
;
435 channel_flags
|= IEEE80211_CHAN_CCK
| IEEE80211_CHAN_2GHZ
;
437 channel_flags
|= IEEE80211_CHAN_2GHZ
;
438 put_unaligned_le16(channel_flags
, pos
);
441 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
442 if (ieee80211_hw_check(&local
->hw
, SIGNAL_DBM
) &&
443 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
444 *pos
= status
->signal
;
446 cpu_to_le32(BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL
));
450 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
452 if (!status
->chains
) {
453 /* IEEE80211_RADIOTAP_ANTENNA */
454 *pos
= status
->antenna
;
458 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
460 /* IEEE80211_RADIOTAP_RX_FLAGS */
461 /* ensure 2 byte alignment for the 2 byte field as required */
462 if ((pos
- (u8
*)rthdr
) & 1)
464 if (status
->flag
& RX_FLAG_FAILED_PLCP_CRC
)
465 rx_flags
|= IEEE80211_RADIOTAP_F_RX_BADPLCP
;
466 put_unaligned_le16(rx_flags
, pos
);
469 if (status
->encoding
== RX_ENC_HT
) {
472 rthdr
->it_present
|= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS
));
473 *pos
= local
->hw
.radiotap_mcs_details
;
474 if (status
->enc_flags
& RX_ENC_FLAG_HT_GF
)
475 *pos
|= IEEE80211_RADIOTAP_MCS_HAVE_FMT
;
476 if (status
->enc_flags
& RX_ENC_FLAG_LDPC
)
477 *pos
|= IEEE80211_RADIOTAP_MCS_HAVE_FEC
;
480 if (status
->enc_flags
& RX_ENC_FLAG_SHORT_GI
)
481 *pos
|= IEEE80211_RADIOTAP_MCS_SGI
;
482 if (status
->bw
== RATE_INFO_BW_40
)
483 *pos
|= IEEE80211_RADIOTAP_MCS_BW_40
;
484 if (status
->enc_flags
& RX_ENC_FLAG_HT_GF
)
485 *pos
|= IEEE80211_RADIOTAP_MCS_FMT_GF
;
486 if (status
->enc_flags
& RX_ENC_FLAG_LDPC
)
487 *pos
|= IEEE80211_RADIOTAP_MCS_FEC_LDPC
;
488 stbc
= (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
) >> RX_ENC_FLAG_STBC_SHIFT
;
489 *pos
|= stbc
<< IEEE80211_RADIOTAP_MCS_STBC_SHIFT
;
491 *pos
++ = status
->rate_idx
;
494 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
497 /* ensure 4 byte alignment */
498 while ((pos
- (u8
*)rthdr
) & 3)
501 cpu_to_le32(BIT(IEEE80211_RADIOTAP_AMPDU_STATUS
));
502 put_unaligned_le32(status
->ampdu_reference
, pos
);
504 if (status
->flag
& RX_FLAG_AMPDU_LAST_KNOWN
)
505 flags
|= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN
;
506 if (status
->flag
& RX_FLAG_AMPDU_IS_LAST
)
507 flags
|= IEEE80211_RADIOTAP_AMPDU_IS_LAST
;
508 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_ERROR
)
509 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR
;
510 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
511 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN
;
512 if (status
->flag
& RX_FLAG_AMPDU_EOF_BIT_KNOWN
)
513 flags
|= IEEE80211_RADIOTAP_AMPDU_EOF_KNOWN
;
514 if (status
->flag
& RX_FLAG_AMPDU_EOF_BIT
)
515 flags
|= IEEE80211_RADIOTAP_AMPDU_EOF
;
516 put_unaligned_le16(flags
, pos
);
518 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
519 *pos
++ = status
->ampdu_delimiter_crc
;
525 if (status
->encoding
== RX_ENC_VHT
) {
526 u16 known
= local
->hw
.radiotap_vht_details
;
528 rthdr
->it_present
|= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT
));
529 put_unaligned_le16(known
, pos
);
532 if (status
->enc_flags
& RX_ENC_FLAG_SHORT_GI
)
533 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_SGI
;
534 /* in VHT, STBC is binary */
535 if (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
)
536 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_STBC
;
537 if (status
->enc_flags
& RX_ENC_FLAG_BF
)
538 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED
;
541 switch (status
->bw
) {
542 case RATE_INFO_BW_80
:
545 case RATE_INFO_BW_160
:
548 case RATE_INFO_BW_40
:
555 *pos
= (status
->rate_idx
<< 4) | status
->nss
;
558 if (status
->enc_flags
& RX_ENC_FLAG_LDPC
)
559 *pos
|= IEEE80211_RADIOTAP_CODING_LDPC_USER0
;
567 if (local
->hw
.radiotap_timestamp
.units_pos
>= 0) {
569 u8 flags
= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT
;
572 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TIMESTAMP
));
574 /* ensure 8 byte alignment */
575 while ((pos
- (u8
*)rthdr
) & 7)
578 put_unaligned_le64(status
->device_timestamp
, pos
);
581 if (local
->hw
.radiotap_timestamp
.accuracy
>= 0) {
582 accuracy
= local
->hw
.radiotap_timestamp
.accuracy
;
583 flags
|= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY
;
585 put_unaligned_le16(accuracy
, pos
);
588 *pos
++ = local
->hw
.radiotap_timestamp
.units_pos
;
592 if (status
->encoding
== RX_ENC_HE
&&
593 status
->flag
& RX_FLAG_RADIOTAP_HE
) {
594 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
596 if (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
) {
597 he
.data6
|= HE_PREP(DATA6_NSTS
,
598 FIELD_GET(RX_ENC_FLAG_STBC_MASK
,
600 he
.data3
|= HE_PREP(DATA3_STBC
, 1);
602 he
.data6
|= HE_PREP(DATA6_NSTS
, status
->nss
);
605 #define CHECK_GI(s) \
606 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
607 (int)NL80211_RATE_INFO_HE_GI_##s)
613 he
.data3
|= HE_PREP(DATA3_DATA_MCS
, status
->rate_idx
);
614 he
.data3
|= HE_PREP(DATA3_DATA_DCM
, status
->he_dcm
);
615 he
.data3
|= HE_PREP(DATA3_CODING
,
616 !!(status
->enc_flags
& RX_ENC_FLAG_LDPC
));
618 he
.data5
|= HE_PREP(DATA5_GI
, status
->he_gi
);
620 switch (status
->bw
) {
621 case RATE_INFO_BW_20
:
622 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
623 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ
);
625 case RATE_INFO_BW_40
:
626 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
627 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ
);
629 case RATE_INFO_BW_80
:
630 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
631 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ
);
633 case RATE_INFO_BW_160
:
634 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
635 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ
);
637 case RATE_INFO_BW_HE_RU
:
638 #define CHECK_RU_ALLOC(s) \
639 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
640 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
648 CHECK_RU_ALLOC(2x996
);
650 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
654 WARN_ONCE(1, "Invalid SU BW %d\n", status
->bw
);
657 /* ensure 2 byte alignment */
658 while ((pos
- (u8
*)rthdr
) & 1)
660 rthdr
->it_present
|= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE
));
661 memcpy(pos
, &he
, sizeof(he
));
665 if (status
->encoding
== RX_ENC_HE
&&
666 status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
667 /* ensure 2 byte alignment */
668 while ((pos
- (u8
*)rthdr
) & 1)
670 rthdr
->it_present
|= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE_MU
));
671 memcpy(pos
, &he_mu
, sizeof(he_mu
));
672 pos
+= sizeof(he_mu
);
675 if (status
->flag
& RX_FLAG_NO_PSDU
) {
677 cpu_to_le32(BIT(IEEE80211_RADIOTAP_ZERO_LEN_PSDU
));
678 *pos
++ = status
->zero_length_psdu_type
;
681 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
682 /* ensure 2 byte alignment */
683 while ((pos
- (u8
*)rthdr
) & 1)
685 rthdr
->it_present
|= cpu_to_le32(BIT(IEEE80211_RADIOTAP_LSIG
));
686 memcpy(pos
, &lsig
, sizeof(lsig
));
690 for_each_set_bit(chain
, &chains
, IEEE80211_MAX_CHAINS
) {
691 *pos
++ = status
->chain_signal
[chain
];
696 static struct sk_buff
*
697 ieee80211_make_monitor_skb(struct ieee80211_local
*local
,
698 struct sk_buff
**origskb
,
699 struct ieee80211_rate
*rate
,
700 int rtap_space
, bool use_origskb
)
702 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(*origskb
);
703 int rt_hdrlen
, needed_headroom
;
706 /* room for the radiotap header based on driver features */
707 rt_hdrlen
= ieee80211_rx_radiotap_hdrlen(local
, status
, *origskb
);
708 needed_headroom
= rt_hdrlen
- rtap_space
;
711 /* only need to expand headroom if necessary */
716 * This shouldn't trigger often because most devices have an
717 * RX header they pull before we get here, and that should
718 * be big enough for our radiotap information. We should
719 * probably export the length to drivers so that we can have
720 * them allocate enough headroom to start with.
722 if (skb_headroom(skb
) < needed_headroom
&&
723 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
)) {
729 * Need to make a copy and possibly remove radiotap header
730 * and FCS from the original.
732 skb
= skb_copy_expand(*origskb
, needed_headroom
+ NET_SKB_PAD
,
739 /* prepend radiotap information */
740 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, rt_hdrlen
, true);
742 skb_reset_mac_header(skb
);
743 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
744 skb
->pkt_type
= PACKET_OTHERHOST
;
745 skb
->protocol
= htons(ETH_P_802_2
);
751 * This function copies a received frame to all monitor interfaces and
752 * returns a cleaned-up SKB that no longer includes the FCS nor the
753 * radiotap header the driver might have added.
755 static struct sk_buff
*
756 ieee80211_rx_monitor(struct ieee80211_local
*local
, struct sk_buff
*origskb
,
757 struct ieee80211_rate
*rate
)
759 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(origskb
);
760 struct ieee80211_sub_if_data
*sdata
;
761 struct sk_buff
*monskb
= NULL
;
762 int present_fcs_len
= 0;
763 unsigned int rtap_space
= 0;
764 struct ieee80211_sub_if_data
*monitor_sdata
=
765 rcu_dereference(local
->monitor_sdata
);
766 bool only_monitor
= false;
767 unsigned int min_head_len
;
769 if (WARN_ON_ONCE(status
->flag
& RX_FLAG_RADIOTAP_TLV_AT_END
&&
770 !skb_mac_header_was_set(origskb
))) {
771 /* with this skb no way to know where frame payload starts */
772 dev_kfree_skb(origskb
);
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 (status
->flag
& RX_FLAG_RADIOTAP_TLV_AT_END
)
786 rtap_space
+= skb_mac_header(origskb
) - &origskb
->data
[rtap_space
];
788 min_head_len
= rtap_space
;
791 * First, we may need to make a copy of the skb because
792 * (1) we need to modify it for radiotap (if not present), and
793 * (2) the other RX handlers will modify the skb we got.
795 * We don't need to, of course, if we aren't going to return
796 * the SKB because it has a bad FCS/PLCP checksum.
799 if (!(status
->flag
& RX_FLAG_NO_PSDU
)) {
800 if (ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
)) {
801 if (unlikely(origskb
->len
<= FCS_LEN
+ rtap_space
)) {
804 dev_kfree_skb(origskb
);
807 present_fcs_len
= FCS_LEN
;
810 /* also consider the hdr->frame_control */
814 /* ensure that the expected data elements are in skb head */
815 if (!pskb_may_pull(origskb
, min_head_len
)) {
816 dev_kfree_skb(origskb
);
820 only_monitor
= should_drop_frame(origskb
, present_fcs_len
, rtap_space
);
822 if (!local
->monitors
|| (status
->flag
& RX_FLAG_SKIP_MONITOR
)) {
824 dev_kfree_skb(origskb
);
828 return ieee80211_clean_skb(origskb
, present_fcs_len
,
832 ieee80211_handle_mu_mimo_mon(monitor_sdata
, origskb
, rtap_space
);
834 list_for_each_entry_rcu(sdata
, &local
->mon_list
, u
.mntr
.list
) {
835 bool last_monitor
= list_is_last(&sdata
->u
.mntr
.list
,
839 monskb
= ieee80211_make_monitor_skb(local
, &origskb
,
851 skb
= skb_clone(monskb
, GFP_ATOMIC
);
855 skb
->dev
= sdata
->dev
;
856 dev_sw_netstats_rx_add(skb
->dev
, skb
->len
);
857 netif_receive_skb(skb
);
865 /* this happens if last_monitor was erroneously false */
866 dev_kfree_skb(monskb
);
872 return ieee80211_clean_skb(origskb
, present_fcs_len
, rtap_space
);
875 static void ieee80211_parse_qos(struct ieee80211_rx_data
*rx
)
877 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
878 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
879 int tid
, seqno_idx
, security_idx
;
881 /* does the frame have a qos control field? */
882 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
883 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
884 /* frame has qos control */
885 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
886 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
887 status
->rx_flags
|= IEEE80211_RX_AMSDU
;
893 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
895 * Sequence numbers for management frames, QoS data
896 * frames with a broadcast/multicast address in the
897 * Address 1 field, and all non-QoS data frames sent
898 * by QoS STAs are assigned using an additional single
899 * modulo-4096 counter, [...]
901 * We also use that counter for non-QoS STAs.
903 seqno_idx
= IEEE80211_NUM_TIDS
;
905 if (ieee80211_is_mgmt(hdr
->frame_control
))
906 security_idx
= IEEE80211_NUM_TIDS
;
910 rx
->seqno_idx
= seqno_idx
;
911 rx
->security_idx
= security_idx
;
912 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
913 * For now, set skb->priority to 0 for other cases. */
914 rx
->skb
->priority
= (tid
> 7) ? 0 : tid
;
918 * DOC: Packet alignment
920 * Drivers always need to pass packets that are aligned to two-byte boundaries
923 * Additionally, should, if possible, align the payload data in a way that
924 * guarantees that the contained IP header is aligned to a four-byte
925 * boundary. In the case of regular frames, this simply means aligning the
926 * payload to a four-byte boundary (because either the IP header is directly
927 * contained, or IV/RFC1042 headers that have a length divisible by four are
928 * in front of it). If the payload data is not properly aligned and the
929 * architecture doesn't support efficient unaligned operations, mac80211
930 * will align the data.
932 * With A-MSDU frames, however, the payload data address must yield two modulo
933 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
934 * push the IP header further back to a multiple of four again. Thankfully, the
935 * specs were sane enough this time around to require padding each A-MSDU
936 * subframe to a length that is a multiple of four.
938 * Padding like Atheros hardware adds which is between the 802.11 header and
939 * the payload is not supported, the driver is required to move the 802.11
940 * header to be directly in front of the payload in that case.
942 static void ieee80211_verify_alignment(struct ieee80211_rx_data
*rx
)
944 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
945 WARN_ON_ONCE((unsigned long)rx
->skb
->data
& 1);
952 static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff
*skb
)
954 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
956 if (is_multicast_ether_addr(hdr
->addr1
))
959 return ieee80211_is_robust_mgmt_frame(skb
);
963 static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff
*skb
)
965 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
967 if (!is_multicast_ether_addr(hdr
->addr1
))
970 return ieee80211_is_robust_mgmt_frame(skb
);
974 /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
975 static int ieee80211_get_mmie_keyidx(struct sk_buff
*skb
)
977 struct ieee80211_mgmt
*hdr
= (struct ieee80211_mgmt
*) skb
->data
;
978 struct ieee80211_mmie
*mmie
;
979 struct ieee80211_mmie_16
*mmie16
;
981 if (skb
->len
< 24 + sizeof(*mmie
) || !is_multicast_ether_addr(hdr
->da
))
984 if (!ieee80211_is_robust_mgmt_frame(skb
) &&
985 !ieee80211_is_beacon(hdr
->frame_control
))
986 return -1; /* not a robust management frame */
988 mmie
= (struct ieee80211_mmie
*)
989 (skb
->data
+ skb
->len
- sizeof(*mmie
));
990 if (mmie
->element_id
== WLAN_EID_MMIE
&&
991 mmie
->length
== sizeof(*mmie
) - 2)
992 return le16_to_cpu(mmie
->key_id
);
994 mmie16
= (struct ieee80211_mmie_16
*)
995 (skb
->data
+ skb
->len
- sizeof(*mmie16
));
996 if (skb
->len
>= 24 + sizeof(*mmie16
) &&
997 mmie16
->element_id
== WLAN_EID_MMIE
&&
998 mmie16
->length
== sizeof(*mmie16
) - 2)
999 return le16_to_cpu(mmie16
->key_id
);
1004 static int ieee80211_get_keyid(struct sk_buff
*skb
)
1006 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1007 __le16 fc
= hdr
->frame_control
;
1008 int hdrlen
= ieee80211_hdrlen(fc
);
1011 /* WEP, TKIP, CCMP and GCMP */
1012 if (unlikely(skb
->len
< hdrlen
+ IEEE80211_WEP_IV_LEN
))
1015 skb_copy_bits(skb
, hdrlen
+ 3, &keyid
, 1);
1022 static ieee80211_rx_result
ieee80211_rx_mesh_check(struct ieee80211_rx_data
*rx
)
1024 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1025 char *dev_addr
= rx
->sdata
->vif
.addr
;
1027 if (ieee80211_is_data(hdr
->frame_control
)) {
1028 if (is_multicast_ether_addr(hdr
->addr1
)) {
1029 if (ieee80211_has_tods(hdr
->frame_control
) ||
1030 !ieee80211_has_fromds(hdr
->frame_control
))
1031 return RX_DROP_MONITOR
;
1032 if (ether_addr_equal(hdr
->addr3
, dev_addr
))
1033 return RX_DROP_MONITOR
;
1035 if (!ieee80211_has_a4(hdr
->frame_control
))
1036 return RX_DROP_MONITOR
;
1037 if (ether_addr_equal(hdr
->addr4
, dev_addr
))
1038 return RX_DROP_MONITOR
;
1042 /* If there is not an established peer link and this is not a peer link
1043 * establisment frame, beacon or probe, drop the frame.
1046 if (!rx
->sta
|| sta_plink_state(rx
->sta
) != NL80211_PLINK_ESTAB
) {
1047 struct ieee80211_mgmt
*mgmt
;
1049 if (!ieee80211_is_mgmt(hdr
->frame_control
))
1050 return RX_DROP_MONITOR
;
1052 if (ieee80211_is_action(hdr
->frame_control
)) {
1055 /* make sure category field is present */
1056 if (rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
)
1057 return RX_DROP_MONITOR
;
1059 mgmt
= (struct ieee80211_mgmt
*)hdr
;
1060 category
= mgmt
->u
.action
.category
;
1061 if (category
!= WLAN_CATEGORY_MESH_ACTION
&&
1062 category
!= WLAN_CATEGORY_SELF_PROTECTED
)
1063 return RX_DROP_MONITOR
;
1067 if (ieee80211_is_probe_req(hdr
->frame_control
) ||
1068 ieee80211_is_probe_resp(hdr
->frame_control
) ||
1069 ieee80211_is_beacon(hdr
->frame_control
) ||
1070 ieee80211_is_auth(hdr
->frame_control
))
1073 return RX_DROP_MONITOR
;
1079 static inline bool ieee80211_rx_reorder_ready(struct tid_ampdu_rx
*tid_agg_rx
,
1082 struct sk_buff_head
*frames
= &tid_agg_rx
->reorder_buf
[index
];
1083 struct sk_buff
*tail
= skb_peek_tail(frames
);
1084 struct ieee80211_rx_status
*status
;
1086 if (tid_agg_rx
->reorder_buf_filtered
&&
1087 tid_agg_rx
->reorder_buf_filtered
& BIT_ULL(index
))
1093 status
= IEEE80211_SKB_RXCB(tail
);
1094 if (status
->flag
& RX_FLAG_AMSDU_MORE
)
1100 static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data
*sdata
,
1101 struct tid_ampdu_rx
*tid_agg_rx
,
1103 struct sk_buff_head
*frames
)
1105 struct sk_buff_head
*skb_list
= &tid_agg_rx
->reorder_buf
[index
];
1106 struct sk_buff
*skb
;
1107 struct ieee80211_rx_status
*status
;
1109 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1111 if (skb_queue_empty(skb_list
))
1114 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1115 __skb_queue_purge(skb_list
);
1119 /* release frames from the reorder ring buffer */
1120 tid_agg_rx
->stored_mpdu_num
--;
1121 while ((skb
= __skb_dequeue(skb_list
))) {
1122 status
= IEEE80211_SKB_RXCB(skb
);
1123 status
->rx_flags
|= IEEE80211_RX_DEFERRED_RELEASE
;
1124 __skb_queue_tail(frames
, skb
);
1128 if (tid_agg_rx
->reorder_buf_filtered
)
1129 tid_agg_rx
->reorder_buf_filtered
&= ~BIT_ULL(index
);
1130 tid_agg_rx
->head_seq_num
= ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
1133 static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data
*sdata
,
1134 struct tid_ampdu_rx
*tid_agg_rx
,
1136 struct sk_buff_head
*frames
)
1140 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1142 while (ieee80211_sn_less(tid_agg_rx
->head_seq_num
, head_seq_num
)) {
1143 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1144 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
1150 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
1151 * the skb was added to the buffer longer than this time ago, the earlier
1152 * frames that have not yet been received are assumed to be lost and the skb
1153 * can be released for processing. This may also release other skb's from the
1154 * reorder buffer if there are no additional gaps between the frames.
1156 * Callers must hold tid_agg_rx->reorder_lock.
1158 #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
1160 static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data
*sdata
,
1161 struct tid_ampdu_rx
*tid_agg_rx
,
1162 struct sk_buff_head
*frames
)
1166 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1168 /* release the buffer until next missing frame */
1169 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1170 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, index
) &&
1171 tid_agg_rx
->stored_mpdu_num
) {
1173 * No buffers ready to be released, but check whether any
1174 * frames in the reorder buffer have timed out.
1177 for (j
= (index
+ 1) % tid_agg_rx
->buf_size
; j
!= index
;
1178 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
1179 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, j
)) {
1184 !time_after(jiffies
, tid_agg_rx
->reorder_time
[j
] +
1185 HT_RX_REORDER_BUF_TIMEOUT
))
1186 goto set_release_timer
;
1188 /* don't leave incomplete A-MSDUs around */
1189 for (i
= (index
+ 1) % tid_agg_rx
->buf_size
; i
!= j
;
1190 i
= (i
+ 1) % tid_agg_rx
->buf_size
)
1191 __skb_queue_purge(&tid_agg_rx
->reorder_buf
[i
]);
1193 ht_dbg_ratelimited(sdata
,
1194 "release an RX reorder frame due to timeout on earlier frames\n");
1195 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, j
,
1199 * Increment the head seq# also for the skipped slots.
1201 tid_agg_rx
->head_seq_num
=
1202 (tid_agg_rx
->head_seq_num
+
1203 skipped
) & IEEE80211_SN_MASK
;
1206 } else while (ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1207 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
1209 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1212 if (tid_agg_rx
->stored_mpdu_num
) {
1213 j
= index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1215 for (; j
!= (index
- 1) % tid_agg_rx
->buf_size
;
1216 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
1217 if (ieee80211_rx_reorder_ready(tid_agg_rx
, j
))
1223 if (!tid_agg_rx
->removed
)
1224 mod_timer(&tid_agg_rx
->reorder_timer
,
1225 tid_agg_rx
->reorder_time
[j
] + 1 +
1226 HT_RX_REORDER_BUF_TIMEOUT
);
1228 del_timer(&tid_agg_rx
->reorder_timer
);
1233 * As this function belongs to the RX path it must be under
1234 * rcu_read_lock protection. It returns false if the frame
1235 * can be processed immediately, true if it was consumed.
1237 static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data
*sdata
,
1238 struct tid_ampdu_rx
*tid_agg_rx
,
1239 struct sk_buff
*skb
,
1240 struct sk_buff_head
*frames
)
1242 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1243 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1244 u16 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1245 u16 mpdu_seq_num
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
1246 u16 head_seq_num
, buf_size
;
1250 spin_lock(&tid_agg_rx
->reorder_lock
);
1253 * Offloaded BA sessions have no known starting sequence number so pick
1254 * one from first Rxed frame for this tid after BA was started.
1256 if (unlikely(tid_agg_rx
->auto_seq
)) {
1257 tid_agg_rx
->auto_seq
= false;
1258 tid_agg_rx
->ssn
= mpdu_seq_num
;
1259 tid_agg_rx
->head_seq_num
= mpdu_seq_num
;
1262 buf_size
= tid_agg_rx
->buf_size
;
1263 head_seq_num
= tid_agg_rx
->head_seq_num
;
1266 * If the current MPDU's SN is smaller than the SSN, it shouldn't
1269 if (unlikely(!tid_agg_rx
->started
)) {
1270 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
1274 tid_agg_rx
->started
= true;
1277 /* frame with out of date sequence number */
1278 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
1284 * If frame the sequence number exceeds our buffering window
1285 * size release some previous frames to make room for this one.
1287 if (!ieee80211_sn_less(mpdu_seq_num
, head_seq_num
+ buf_size
)) {
1288 head_seq_num
= ieee80211_sn_inc(
1289 ieee80211_sn_sub(mpdu_seq_num
, buf_size
));
1290 /* release stored frames up to new head to stack */
1291 ieee80211_release_reorder_frames(sdata
, tid_agg_rx
,
1292 head_seq_num
, frames
);
1295 /* Now the new frame is always in the range of the reordering buffer */
1297 index
= mpdu_seq_num
% tid_agg_rx
->buf_size
;
1299 /* check if we already stored this frame */
1300 if (ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1306 * If the current MPDU is in the right order and nothing else
1307 * is stored we can process it directly, no need to buffer it.
1308 * If it is first but there's something stored, we may be able
1309 * to release frames after this one.
1311 if (mpdu_seq_num
== tid_agg_rx
->head_seq_num
&&
1312 tid_agg_rx
->stored_mpdu_num
== 0) {
1313 if (!(status
->flag
& RX_FLAG_AMSDU_MORE
))
1314 tid_agg_rx
->head_seq_num
=
1315 ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
1320 /* put the frame in the reordering buffer */
1321 __skb_queue_tail(&tid_agg_rx
->reorder_buf
[index
], skb
);
1322 if (!(status
->flag
& RX_FLAG_AMSDU_MORE
)) {
1323 tid_agg_rx
->reorder_time
[index
] = jiffies
;
1324 tid_agg_rx
->stored_mpdu_num
++;
1325 ieee80211_sta_reorder_release(sdata
, tid_agg_rx
, frames
);
1329 spin_unlock(&tid_agg_rx
->reorder_lock
);
1334 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
1335 * true if the MPDU was buffered, false if it should be processed.
1337 static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data
*rx
,
1338 struct sk_buff_head
*frames
)
1340 struct sk_buff
*skb
= rx
->skb
;
1341 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1342 struct sta_info
*sta
= rx
->sta
;
1343 struct tid_ampdu_rx
*tid_agg_rx
;
1347 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
1348 is_multicast_ether_addr(hdr
->addr1
))
1352 * filter the QoS data rx stream according to
1353 * STA/TID and check if this STA/TID is on aggregation
1359 ack_policy
= *ieee80211_get_qos_ctl(hdr
) &
1360 IEEE80211_QOS_CTL_ACK_POLICY_MASK
;
1361 tid
= ieee80211_get_tid(hdr
);
1363 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
1365 if (ack_policy
== IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK
&&
1366 !test_bit(tid
, rx
->sta
->ampdu_mlme
.agg_session_valid
) &&
1367 !test_and_set_bit(tid
, rx
->sta
->ampdu_mlme
.unexpected_agg
))
1368 ieee80211_send_delba(rx
->sdata
, rx
->sta
->sta
.addr
, tid
,
1369 WLAN_BACK_RECIPIENT
,
1370 WLAN_REASON_QSTA_REQUIRE_SETUP
);
1374 /* qos null data frames are excluded */
1375 if (unlikely(hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_NULLFUNC
)))
1378 /* not part of a BA session */
1379 if (ack_policy
== IEEE80211_QOS_CTL_ACK_POLICY_NOACK
)
1382 /* new, potentially un-ordered, ampdu frame - process it */
1384 /* reset session timer */
1385 if (tid_agg_rx
->timeout
)
1386 tid_agg_rx
->last_rx
= jiffies
;
1388 /* if this mpdu is fragmented - terminate rx aggregation session */
1389 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1390 if (sc
& IEEE80211_SCTL_FRAG
) {
1391 ieee80211_queue_skb_to_iface(rx
->sdata
, rx
->link_id
, NULL
, skb
);
1396 * No locking needed -- we will only ever process one
1397 * RX packet at a time, and thus own tid_agg_rx. All
1398 * other code manipulating it needs to (and does) make
1399 * sure that we cannot get to it any more before doing
1402 if (ieee80211_sta_manage_reorder_buf(rx
->sdata
, tid_agg_rx
, skb
,
1407 __skb_queue_tail(frames
, skb
);
1410 static ieee80211_rx_result debug_noinline
1411 ieee80211_rx_h_check_dup(struct ieee80211_rx_data
*rx
)
1413 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1414 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1416 if (status
->flag
& RX_FLAG_DUP_VALIDATED
)
1420 * Drop duplicate 802.11 retransmissions
1421 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
1424 if (rx
->skb
->len
< 24)
1427 if (ieee80211_is_ctl(hdr
->frame_control
) ||
1428 ieee80211_is_any_nullfunc(hdr
->frame_control
) ||
1429 is_multicast_ether_addr(hdr
->addr1
))
1435 if (unlikely(ieee80211_has_retry(hdr
->frame_control
) &&
1436 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] == hdr
->seq_ctrl
)) {
1437 I802_DEBUG_INC(rx
->local
->dot11FrameDuplicateCount
);
1438 rx
->link_sta
->rx_stats
.num_duplicates
++;
1439 return RX_DROP_U_DUP
;
1440 } else if (!(status
->flag
& RX_FLAG_AMSDU_MORE
)) {
1441 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] = hdr
->seq_ctrl
;
1447 static ieee80211_rx_result debug_noinline
1448 ieee80211_rx_h_check(struct ieee80211_rx_data
*rx
)
1450 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1452 /* Drop disallowed frame classes based on STA auth/assoc state;
1453 * IEEE 802.11, Chap 5.5.
1455 * mac80211 filters only based on association state, i.e. it drops
1456 * Class 3 frames from not associated stations. hostapd sends
1457 * deauth/disassoc frames when needed. In addition, hostapd is
1458 * responsible for filtering on both auth and assoc states.
1461 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1462 return ieee80211_rx_mesh_check(rx
);
1464 if (unlikely((ieee80211_is_data(hdr
->frame_control
) ||
1465 ieee80211_is_pspoll(hdr
->frame_control
)) &&
1466 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1467 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_OCB
&&
1468 (!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_ASSOC
)))) {
1470 * accept port control frames from the AP even when it's not
1471 * yet marked ASSOC to prevent a race where we don't set the
1472 * assoc bit quickly enough before it sends the first frame
1474 if (rx
->sta
&& rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1475 ieee80211_is_data_present(hdr
->frame_control
)) {
1476 unsigned int hdrlen
;
1479 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1481 if (rx
->skb
->len
< hdrlen
+ 8)
1482 return RX_DROP_MONITOR
;
1484 skb_copy_bits(rx
->skb
, hdrlen
+ 6, ðertype
, 2);
1485 if (ethertype
== rx
->sdata
->control_port_protocol
)
1489 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
1490 cfg80211_rx_spurious_frame(rx
->sdata
->dev
,
1493 return RX_DROP_U_SPURIOUS
;
1495 return RX_DROP_MONITOR
;
1502 static ieee80211_rx_result debug_noinline
1503 ieee80211_rx_h_check_more_data(struct ieee80211_rx_data
*rx
)
1505 struct ieee80211_local
*local
;
1506 struct ieee80211_hdr
*hdr
;
1507 struct sk_buff
*skb
;
1511 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1513 if (!local
->pspolling
)
1516 if (!ieee80211_has_fromds(hdr
->frame_control
))
1517 /* this is not from AP */
1520 if (!ieee80211_is_data(hdr
->frame_control
))
1523 if (!ieee80211_has_moredata(hdr
->frame_control
)) {
1524 /* AP has no more frames buffered for us */
1525 local
->pspolling
= false;
1529 /* more data bit is set, let's request a new frame from the AP */
1530 ieee80211_send_pspoll(local
, rx
->sdata
);
1535 static void sta_ps_start(struct sta_info
*sta
)
1537 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1538 struct ieee80211_local
*local
= sdata
->local
;
1542 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1543 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1544 ps
= &sdata
->bss
->ps
;
1548 atomic_inc(&ps
->num_sta_ps
);
1549 set_sta_flag(sta
, WLAN_STA_PS_STA
);
1550 if (!ieee80211_hw_check(&local
->hw
, AP_LINK_PS
))
1551 drv_sta_notify(local
, sdata
, STA_NOTIFY_SLEEP
, &sta
->sta
);
1552 ps_dbg(sdata
, "STA %pM aid %d enters power save mode\n",
1553 sta
->sta
.addr
, sta
->sta
.aid
);
1555 ieee80211_clear_fast_xmit(sta
);
1557 for (tid
= 0; tid
< IEEE80211_NUM_TIDS
; tid
++) {
1558 struct ieee80211_txq
*txq
= sta
->sta
.txq
[tid
];
1559 struct txq_info
*txqi
= to_txq_info(txq
);
1561 spin_lock(&local
->active_txq_lock
[txq
->ac
]);
1562 if (!list_empty(&txqi
->schedule_order
))
1563 list_del_init(&txqi
->schedule_order
);
1564 spin_unlock(&local
->active_txq_lock
[txq
->ac
]);
1566 if (txq_has_queue(txq
))
1567 set_bit(tid
, &sta
->txq_buffered_tids
);
1569 clear_bit(tid
, &sta
->txq_buffered_tids
);
1573 static void sta_ps_end(struct sta_info
*sta
)
1575 ps_dbg(sta
->sdata
, "STA %pM aid %d exits power save mode\n",
1576 sta
->sta
.addr
, sta
->sta
.aid
);
1578 if (test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) {
1580 * Clear the flag only if the other one is still set
1581 * so that the TX path won't start TX'ing new frames
1582 * directly ... In the case that the driver flag isn't
1583 * set ieee80211_sta_ps_deliver_wakeup() will clear it.
1585 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
1586 ps_dbg(sta
->sdata
, "STA %pM aid %d driver-ps-blocked\n",
1587 sta
->sta
.addr
, sta
->sta
.aid
);
1591 set_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1592 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
1593 ieee80211_sta_ps_deliver_wakeup(sta
);
1596 int ieee80211_sta_ps_transition(struct ieee80211_sta
*pubsta
, bool start
)
1598 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1601 WARN_ON(!ieee80211_hw_check(&sta
->local
->hw
, AP_LINK_PS
));
1603 /* Don't let the same PS state be set twice */
1604 in_ps
= test_sta_flag(sta
, WLAN_STA_PS_STA
);
1605 if ((start
&& in_ps
) || (!start
&& !in_ps
))
1615 EXPORT_SYMBOL(ieee80211_sta_ps_transition
);
1617 void ieee80211_sta_pspoll(struct ieee80211_sta
*pubsta
)
1619 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1621 if (test_sta_flag(sta
, WLAN_STA_SP
))
1624 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1625 ieee80211_sta_ps_deliver_poll_response(sta
);
1627 set_sta_flag(sta
, WLAN_STA_PSPOLL
);
1629 EXPORT_SYMBOL(ieee80211_sta_pspoll
);
1631 void ieee80211_sta_uapsd_trigger(struct ieee80211_sta
*pubsta
, u8 tid
)
1633 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1634 int ac
= ieee80211_ac_from_tid(tid
);
1637 * If this AC is not trigger-enabled do nothing unless the
1638 * driver is calling us after it already checked.
1640 * NB: This could/should check a separate bitmap of trigger-
1641 * enabled queues, but for now we only implement uAPSD w/o
1642 * TSPEC changes to the ACs, so they're always the same.
1644 if (!(sta
->sta
.uapsd_queues
& ieee80211_ac_to_qos_mask
[ac
]) &&
1645 tid
!= IEEE80211_NUM_TIDS
)
1648 /* if we are in a service period, do nothing */
1649 if (test_sta_flag(sta
, WLAN_STA_SP
))
1652 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1653 ieee80211_sta_ps_deliver_uapsd(sta
);
1655 set_sta_flag(sta
, WLAN_STA_UAPSD
);
1657 EXPORT_SYMBOL(ieee80211_sta_uapsd_trigger
);
1659 static ieee80211_rx_result debug_noinline
1660 ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data
*rx
)
1662 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1663 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
1664 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1669 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
1670 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
)
1674 * The device handles station powersave, so don't do anything about
1675 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1676 * it to mac80211 since they're handled.)
1678 if (ieee80211_hw_check(&sdata
->local
->hw
, AP_LINK_PS
))
1682 * Don't do anything if the station isn't already asleep. In
1683 * the uAPSD case, the station will probably be marked asleep,
1684 * in the PS-Poll case the station must be confused ...
1686 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_STA
))
1689 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
))) {
1690 ieee80211_sta_pspoll(&rx
->sta
->sta
);
1692 /* Free PS Poll skb here instead of returning RX_DROP that would
1693 * count as an dropped frame. */
1694 dev_kfree_skb(rx
->skb
);
1697 } else if (!ieee80211_has_morefrags(hdr
->frame_control
) &&
1698 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1699 ieee80211_has_pm(hdr
->frame_control
) &&
1700 (ieee80211_is_data_qos(hdr
->frame_control
) ||
1701 ieee80211_is_qos_nullfunc(hdr
->frame_control
))) {
1702 u8 tid
= ieee80211_get_tid(hdr
);
1704 ieee80211_sta_uapsd_trigger(&rx
->sta
->sta
, tid
);
1710 static ieee80211_rx_result debug_noinline
1711 ieee80211_rx_h_sta_process(struct ieee80211_rx_data
*rx
)
1713 struct sta_info
*sta
= rx
->sta
;
1714 struct link_sta_info
*link_sta
= rx
->link_sta
;
1715 struct sk_buff
*skb
= rx
->skb
;
1716 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1717 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1720 if (!sta
|| !link_sta
)
1724 * Update last_rx only for IBSS packets which are for the current
1725 * BSSID and for station already AUTHORIZED to avoid keeping the
1726 * current IBSS network alive in cases where other STAs start
1727 * using different BSSID. This will also give the station another
1728 * chance to restart the authentication/authorization in case
1729 * something went wrong the first time.
1731 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
1732 u8
*bssid
= ieee80211_get_bssid(hdr
, rx
->skb
->len
,
1733 NL80211_IFTYPE_ADHOC
);
1734 if (ether_addr_equal(bssid
, rx
->sdata
->u
.ibss
.bssid
) &&
1735 test_sta_flag(sta
, WLAN_STA_AUTHORIZED
)) {
1736 link_sta
->rx_stats
.last_rx
= jiffies
;
1737 if (ieee80211_is_data_present(hdr
->frame_control
) &&
1738 !is_multicast_ether_addr(hdr
->addr1
))
1739 link_sta
->rx_stats
.last_rate
=
1740 sta_stats_encode_rate(status
);
1742 } else if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
) {
1743 link_sta
->rx_stats
.last_rx
= jiffies
;
1744 } else if (!ieee80211_is_s1g_beacon(hdr
->frame_control
) &&
1745 !is_multicast_ether_addr(hdr
->addr1
)) {
1747 * Mesh beacons will update last_rx when if they are found to
1748 * match the current local configuration when processed.
1750 link_sta
->rx_stats
.last_rx
= jiffies
;
1751 if (ieee80211_is_data_present(hdr
->frame_control
))
1752 link_sta
->rx_stats
.last_rate
= sta_stats_encode_rate(status
);
1755 link_sta
->rx_stats
.fragments
++;
1757 u64_stats_update_begin(&link_sta
->rx_stats
.syncp
);
1758 link_sta
->rx_stats
.bytes
+= rx
->skb
->len
;
1759 u64_stats_update_end(&link_sta
->rx_stats
.syncp
);
1761 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
1762 link_sta
->rx_stats
.last_signal
= status
->signal
;
1763 ewma_signal_add(&link_sta
->rx_stats_avg
.signal
,
1767 if (status
->chains
) {
1768 link_sta
->rx_stats
.chains
= status
->chains
;
1769 for (i
= 0; i
< ARRAY_SIZE(status
->chain_signal
); i
++) {
1770 int signal
= status
->chain_signal
[i
];
1772 if (!(status
->chains
& BIT(i
)))
1775 link_sta
->rx_stats
.chain_signal_last
[i
] = signal
;
1776 ewma_signal_add(&link_sta
->rx_stats_avg
.chain_signal
[i
],
1781 if (ieee80211_is_s1g_beacon(hdr
->frame_control
))
1785 * Change STA power saving mode only at the end of a frame
1786 * exchange sequence, and only for a data or management
1787 * frame as specified in IEEE 802.11-2016 11.2.3.2
1789 if (!ieee80211_hw_check(&sta
->local
->hw
, AP_LINK_PS
) &&
1790 !ieee80211_has_morefrags(hdr
->frame_control
) &&
1791 !is_multicast_ether_addr(hdr
->addr1
) &&
1792 (ieee80211_is_mgmt(hdr
->frame_control
) ||
1793 ieee80211_is_data(hdr
->frame_control
)) &&
1794 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1795 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1796 rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)) {
1797 if (test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1798 if (!ieee80211_has_pm(hdr
->frame_control
))
1801 if (ieee80211_has_pm(hdr
->frame_control
))
1806 /* mesh power save support */
1807 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1808 ieee80211_mps_rx_h_sta_process(sta
, hdr
);
1811 * Drop (qos-)data::nullfunc frames silently, since they
1812 * are used only to control station power saving mode.
1814 if (ieee80211_is_any_nullfunc(hdr
->frame_control
)) {
1815 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_nullfunc
);
1818 * If we receive a 4-addr nullfunc frame from a STA
1819 * that was not moved to a 4-addr STA vlan yet send
1820 * the event to userspace and for older hostapd drop
1821 * the frame to the monitor interface.
1823 if (ieee80211_has_a4(hdr
->frame_control
) &&
1824 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1825 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1826 !rx
->sdata
->u
.vlan
.sta
))) {
1827 if (!test_and_set_sta_flag(sta
, WLAN_STA_4ADDR_EVENT
))
1828 cfg80211_rx_unexpected_4addr_frame(
1829 rx
->sdata
->dev
, sta
->sta
.addr
,
1831 return RX_DROP_M_UNEXPECTED_4ADDR_FRAME
;
1834 * Update counter and free packet here to avoid
1835 * counting this as a dropped packed.
1837 link_sta
->rx_stats
.packets
++;
1838 dev_kfree_skb(rx
->skb
);
1843 } /* ieee80211_rx_h_sta_process */
1845 static struct ieee80211_key
*
1846 ieee80211_rx_get_bigtk(struct ieee80211_rx_data
*rx
, int idx
)
1848 struct ieee80211_key
*key
= NULL
;
1851 /* Make sure key gets set if either BIGTK key index is set so that
1852 * ieee80211_drop_unencrypted_mgmt() can properly drop both unprotected
1853 * Beacon frames and Beacon frames that claim to use another BIGTK key
1854 * index (i.e., a key that we do not have).
1858 idx
= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
;
1861 if (idx
== NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
)
1868 key
= rcu_dereference(rx
->link_sta
->gtk
[idx
]);
1870 key
= rcu_dereference(rx
->link
->gtk
[idx
]);
1871 if (!key
&& rx
->link_sta
)
1872 key
= rcu_dereference(rx
->link_sta
->gtk
[idx2
]);
1874 key
= rcu_dereference(rx
->link
->gtk
[idx2
]);
1879 static ieee80211_rx_result debug_noinline
1880 ieee80211_rx_h_decrypt(struct ieee80211_rx_data
*rx
)
1882 struct sk_buff
*skb
= rx
->skb
;
1883 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1884 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1886 ieee80211_rx_result result
= RX_DROP_U_DECRYPT_FAIL
;
1887 struct ieee80211_key
*sta_ptk
= NULL
;
1888 struct ieee80211_key
*ptk_idx
= NULL
;
1889 int mmie_keyidx
= -1;
1892 if (ieee80211_is_ext(hdr
->frame_control
))
1898 * There are five types of keys:
1899 * - GTK (group keys)
1900 * - IGTK (group keys for management frames)
1901 * - BIGTK (group keys for Beacon frames)
1902 * - PTK (pairwise keys)
1903 * - STK (station-to-station pairwise keys)
1905 * When selecting a key, we have to distinguish between multicast
1906 * (including broadcast) and unicast frames, the latter can only
1907 * use PTKs and STKs while the former always use GTKs, IGTKs, and
1908 * BIGTKs. Unless, of course, actual WEP keys ("pre-RSNA") are used,
1909 * then unicast frames can also use key indices like GTKs. Hence, if we
1910 * don't have a PTK/STK we check the key index for a WEP key.
1912 * Note that in a regular BSS, multicast frames are sent by the
1913 * AP only, associated stations unicast the frame to the AP first
1914 * which then multicasts it on their behalf.
1916 * There is also a slight problem in IBSS mode: GTKs are negotiated
1917 * with each station, that is something we don't currently handle.
1918 * The spec seems to expect that one negotiates the same key with
1919 * every station but there's no such requirement; VLANs could be
1923 /* start without a key */
1925 fc
= hdr
->frame_control
;
1928 int keyid
= rx
->sta
->ptk_idx
;
1929 sta_ptk
= rcu_dereference(rx
->sta
->ptk
[keyid
]);
1931 if (ieee80211_has_protected(fc
) &&
1932 !(status
->flag
& RX_FLAG_IV_STRIPPED
)) {
1933 keyid
= ieee80211_get_keyid(rx
->skb
);
1935 if (unlikely(keyid
< 0))
1936 return RX_DROP_U_NO_KEY_ID
;
1938 ptk_idx
= rcu_dereference(rx
->sta
->ptk
[keyid
]);
1942 if (!ieee80211_has_protected(fc
))
1943 mmie_keyidx
= ieee80211_get_mmie_keyidx(rx
->skb
);
1945 if (!is_multicast_ether_addr(hdr
->addr1
) && sta_ptk
) {
1946 rx
->key
= ptk_idx
? ptk_idx
: sta_ptk
;
1947 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1948 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1950 /* Skip decryption if the frame is not protected. */
1951 if (!ieee80211_has_protected(fc
))
1953 } else if (mmie_keyidx
>= 0 && ieee80211_is_beacon(fc
)) {
1954 /* Broadcast/multicast robust management frame / BIP */
1955 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1956 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1959 if (mmie_keyidx
< NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
||
1960 mmie_keyidx
>= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
+
1961 NUM_DEFAULT_BEACON_KEYS
) {
1963 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
1966 return RX_DROP_M_BAD_BCN_KEYIDX
;
1969 rx
->key
= ieee80211_rx_get_bigtk(rx
, mmie_keyidx
);
1971 return RX_CONTINUE
; /* Beacon protection not in use */
1972 } else if (mmie_keyidx
>= 0) {
1973 /* Broadcast/multicast robust management frame / BIP */
1974 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1975 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1978 if (mmie_keyidx
< NUM_DEFAULT_KEYS
||
1979 mmie_keyidx
>= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
)
1980 return RX_DROP_M_BAD_MGMT_KEYIDX
; /* unexpected BIP keyidx */
1982 if (ieee80211_is_group_privacy_action(skb
) &&
1983 test_sta_flag(rx
->sta
, WLAN_STA_MFP
))
1984 return RX_DROP_MONITOR
;
1986 rx
->key
= rcu_dereference(rx
->link_sta
->gtk
[mmie_keyidx
]);
1989 rx
->key
= rcu_dereference(rx
->link
->gtk
[mmie_keyidx
]);
1990 } else if (!ieee80211_has_protected(fc
)) {
1992 * The frame was not protected, so skip decryption. However, we
1993 * need to set rx->key if there is a key that could have been
1994 * used so that the frame may be dropped if encryption would
1995 * have been expected.
1997 struct ieee80211_key
*key
= NULL
;
2000 if (ieee80211_is_beacon(fc
)) {
2001 key
= ieee80211_rx_get_bigtk(rx
, -1);
2002 } else if (ieee80211_is_mgmt(fc
) &&
2003 is_multicast_ether_addr(hdr
->addr1
)) {
2004 key
= rcu_dereference(rx
->link
->default_mgmt_key
);
2007 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
2008 key
= rcu_dereference(rx
->link_sta
->gtk
[i
]);
2014 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
2015 key
= rcu_dereference(rx
->link
->gtk
[i
]);
2026 * The device doesn't give us the IV so we won't be
2027 * able to look up the key. That's ok though, we
2028 * don't need to decrypt the frame, we just won't
2029 * be able to keep statistics accurate.
2030 * Except for key threshold notifications, should
2031 * we somehow allow the driver to tell us which key
2032 * the hardware used if this flag is set?
2034 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
2035 (status
->flag
& RX_FLAG_IV_STRIPPED
))
2038 keyidx
= ieee80211_get_keyid(rx
->skb
);
2040 if (unlikely(keyidx
< 0))
2041 return RX_DROP_U_NO_KEY_ID
;
2043 /* check per-station GTK first, if multicast packet */
2044 if (is_multicast_ether_addr(hdr
->addr1
) && rx
->link_sta
)
2045 rx
->key
= rcu_dereference(rx
->link_sta
->gtk
[keyidx
]);
2047 /* if not found, try default key */
2049 if (is_multicast_ether_addr(hdr
->addr1
))
2050 rx
->key
= rcu_dereference(rx
->link
->gtk
[keyidx
]);
2052 rx
->key
= rcu_dereference(rx
->sdata
->keys
[keyidx
]);
2055 * RSNA-protected unicast frames should always be
2056 * sent with pairwise or station-to-station keys,
2057 * but for WEP we allow using a key index as well.
2060 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP40
&&
2061 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP104
&&
2062 !is_multicast_ether_addr(hdr
->addr1
))
2068 if (unlikely(rx
->key
->flags
& KEY_FLAG_TAINTED
))
2069 return RX_DROP_MONITOR
;
2071 /* TODO: add threshold stuff again */
2073 return RX_DROP_MONITOR
;
2076 switch (rx
->key
->conf
.cipher
) {
2077 case WLAN_CIPHER_SUITE_WEP40
:
2078 case WLAN_CIPHER_SUITE_WEP104
:
2079 result
= ieee80211_crypto_wep_decrypt(rx
);
2081 case WLAN_CIPHER_SUITE_TKIP
:
2082 result
= ieee80211_crypto_tkip_decrypt(rx
);
2084 case WLAN_CIPHER_SUITE_CCMP
:
2085 result
= ieee80211_crypto_ccmp_decrypt(
2086 rx
, IEEE80211_CCMP_MIC_LEN
);
2088 case WLAN_CIPHER_SUITE_CCMP_256
:
2089 result
= ieee80211_crypto_ccmp_decrypt(
2090 rx
, IEEE80211_CCMP_256_MIC_LEN
);
2092 case WLAN_CIPHER_SUITE_AES_CMAC
:
2093 result
= ieee80211_crypto_aes_cmac_decrypt(rx
);
2095 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
2096 result
= ieee80211_crypto_aes_cmac_256_decrypt(rx
);
2098 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
2099 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
2100 result
= ieee80211_crypto_aes_gmac_decrypt(rx
);
2102 case WLAN_CIPHER_SUITE_GCMP
:
2103 case WLAN_CIPHER_SUITE_GCMP_256
:
2104 result
= ieee80211_crypto_gcmp_decrypt(rx
);
2107 result
= RX_DROP_U_BAD_CIPHER
;
2110 /* the hdr variable is invalid after the decrypt handlers */
2112 /* either the frame has been decrypted or will be dropped */
2113 status
->flag
|= RX_FLAG_DECRYPTED
;
2115 if (unlikely(ieee80211_is_beacon(fc
) && RX_RES_IS_UNUSABLE(result
) &&
2117 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2118 skb
->data
, skb
->len
);
2123 void ieee80211_init_frag_cache(struct ieee80211_fragment_cache
*cache
)
2127 for (i
= 0; i
< ARRAY_SIZE(cache
->entries
); i
++)
2128 skb_queue_head_init(&cache
->entries
[i
].skb_list
);
2131 void ieee80211_destroy_frag_cache(struct ieee80211_fragment_cache
*cache
)
2135 for (i
= 0; i
< ARRAY_SIZE(cache
->entries
); i
++)
2136 __skb_queue_purge(&cache
->entries
[i
].skb_list
);
2139 static inline struct ieee80211_fragment_entry
*
2140 ieee80211_reassemble_add(struct ieee80211_fragment_cache
*cache
,
2141 unsigned int frag
, unsigned int seq
, int rx_queue
,
2142 struct sk_buff
**skb
)
2144 struct ieee80211_fragment_entry
*entry
;
2146 entry
= &cache
->entries
[cache
->next
++];
2147 if (cache
->next
>= IEEE80211_FRAGMENT_MAX
)
2150 __skb_queue_purge(&entry
->skb_list
);
2152 __skb_queue_tail(&entry
->skb_list
, *skb
); /* no need for locking */
2154 entry
->first_frag_time
= jiffies
;
2156 entry
->rx_queue
= rx_queue
;
2157 entry
->last_frag
= frag
;
2158 entry
->check_sequential_pn
= false;
2159 entry
->extra_len
= 0;
2164 static inline struct ieee80211_fragment_entry
*
2165 ieee80211_reassemble_find(struct ieee80211_fragment_cache
*cache
,
2166 unsigned int frag
, unsigned int seq
,
2167 int rx_queue
, struct ieee80211_hdr
*hdr
)
2169 struct ieee80211_fragment_entry
*entry
;
2173 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++) {
2174 struct ieee80211_hdr
*f_hdr
;
2175 struct sk_buff
*f_skb
;
2179 idx
= IEEE80211_FRAGMENT_MAX
- 1;
2181 entry
= &cache
->entries
[idx
];
2182 if (skb_queue_empty(&entry
->skb_list
) || entry
->seq
!= seq
||
2183 entry
->rx_queue
!= rx_queue
||
2184 entry
->last_frag
+ 1 != frag
)
2187 f_skb
= __skb_peek(&entry
->skb_list
);
2188 f_hdr
= (struct ieee80211_hdr
*) f_skb
->data
;
2191 * Check ftype and addresses are equal, else check next fragment
2193 if (((hdr
->frame_control
^ f_hdr
->frame_control
) &
2194 cpu_to_le16(IEEE80211_FCTL_FTYPE
)) ||
2195 !ether_addr_equal(hdr
->addr1
, f_hdr
->addr1
) ||
2196 !ether_addr_equal(hdr
->addr2
, f_hdr
->addr2
))
2199 if (time_after(jiffies
, entry
->first_frag_time
+ 2 * HZ
)) {
2200 __skb_queue_purge(&entry
->skb_list
);
2209 static bool requires_sequential_pn(struct ieee80211_rx_data
*rx
, __le16 fc
)
2212 (rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP
||
2213 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP_256
||
2214 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_GCMP
||
2215 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_GCMP_256
) &&
2216 ieee80211_has_protected(fc
);
2219 static ieee80211_rx_result debug_noinline
2220 ieee80211_rx_h_defragment(struct ieee80211_rx_data
*rx
)
2222 struct ieee80211_fragment_cache
*cache
= &rx
->sdata
->frags
;
2223 struct ieee80211_hdr
*hdr
;
2226 unsigned int frag
, seq
;
2227 struct ieee80211_fragment_entry
*entry
;
2228 struct sk_buff
*skb
;
2229 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2231 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2232 fc
= hdr
->frame_control
;
2234 if (ieee80211_is_ctl(fc
) || ieee80211_is_ext(fc
))
2237 sc
= le16_to_cpu(hdr
->seq_ctrl
);
2238 frag
= sc
& IEEE80211_SCTL_FRAG
;
2241 cache
= &rx
->sta
->frags
;
2243 if (likely(!ieee80211_has_morefrags(fc
) && frag
== 0))
2246 if (is_multicast_ether_addr(hdr
->addr1
))
2247 return RX_DROP_MONITOR
;
2249 I802_DEBUG_INC(rx
->local
->rx_handlers_fragments
);
2251 if (skb_linearize(rx
->skb
))
2252 return RX_DROP_U_OOM
;
2255 * skb_linearize() might change the skb->data and
2256 * previously cached variables (in this case, hdr) need to
2257 * be refreshed with the new data.
2259 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2260 seq
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
2263 /* This is the first fragment of a new frame. */
2264 entry
= ieee80211_reassemble_add(cache
, frag
, seq
,
2265 rx
->seqno_idx
, &(rx
->skb
));
2266 if (requires_sequential_pn(rx
, fc
)) {
2267 int queue
= rx
->security_idx
;
2269 /* Store CCMP/GCMP PN so that we can verify that the
2270 * next fragment has a sequential PN value.
2272 entry
->check_sequential_pn
= true;
2273 entry
->is_protected
= true;
2274 entry
->key_color
= rx
->key
->color
;
2275 memcpy(entry
->last_pn
,
2276 rx
->key
->u
.ccmp
.rx_pn
[queue
],
2277 IEEE80211_CCMP_PN_LEN
);
2278 BUILD_BUG_ON(offsetof(struct ieee80211_key
,
2280 offsetof(struct ieee80211_key
,
2282 BUILD_BUG_ON(sizeof(rx
->key
->u
.ccmp
.rx_pn
[queue
]) !=
2283 sizeof(rx
->key
->u
.gcmp
.rx_pn
[queue
]));
2284 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN
!=
2285 IEEE80211_GCMP_PN_LEN
);
2286 } else if (rx
->key
&&
2287 (ieee80211_has_protected(fc
) ||
2288 (status
->flag
& RX_FLAG_DECRYPTED
))) {
2289 entry
->is_protected
= true;
2290 entry
->key_color
= rx
->key
->color
;
2295 /* This is a fragment for a frame that should already be pending in
2296 * fragment cache. Add this fragment to the end of the pending entry.
2298 entry
= ieee80211_reassemble_find(cache
, frag
, seq
,
2299 rx
->seqno_idx
, hdr
);
2301 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
2302 return RX_DROP_MONITOR
;
2305 /* "The receiver shall discard MSDUs and MMPDUs whose constituent
2306 * MPDU PN values are not incrementing in steps of 1."
2307 * see IEEE P802.11-REVmc/D5.0, 12.5.3.4.4, item d (for CCMP)
2308 * and IEEE P802.11-REVmc/D5.0, 12.5.5.4.4, item d (for GCMP)
2310 if (entry
->check_sequential_pn
) {
2312 u8 pn
[IEEE80211_CCMP_PN_LEN
], *rpn
;
2314 if (!requires_sequential_pn(rx
, fc
))
2315 return RX_DROP_U_NONSEQ_PN
;
2317 /* Prevent mixed key and fragment cache attacks */
2318 if (entry
->key_color
!= rx
->key
->color
)
2319 return RX_DROP_U_BAD_KEY_COLOR
;
2321 memcpy(pn
, entry
->last_pn
, IEEE80211_CCMP_PN_LEN
);
2322 for (i
= IEEE80211_CCMP_PN_LEN
- 1; i
>= 0; i
--) {
2328 rpn
= rx
->ccm_gcm
.pn
;
2329 if (memcmp(pn
, rpn
, IEEE80211_CCMP_PN_LEN
))
2330 return RX_DROP_U_REPLAY
;
2331 memcpy(entry
->last_pn
, pn
, IEEE80211_CCMP_PN_LEN
);
2332 } else if (entry
->is_protected
&&
2334 (!ieee80211_has_protected(fc
) &&
2335 !(status
->flag
& RX_FLAG_DECRYPTED
)) ||
2336 rx
->key
->color
!= entry
->key_color
)) {
2337 /* Drop this as a mixed key or fragment cache attack, even
2338 * if for TKIP Michael MIC should protect us, and WEP is a
2339 * lost cause anyway.
2341 return RX_DROP_U_EXPECT_DEFRAG_PROT
;
2342 } else if (entry
->is_protected
&& rx
->key
&&
2343 entry
->key_color
!= rx
->key
->color
&&
2344 (status
->flag
& RX_FLAG_DECRYPTED
)) {
2345 return RX_DROP_U_BAD_KEY_COLOR
;
2348 skb_pull(rx
->skb
, ieee80211_hdrlen(fc
));
2349 __skb_queue_tail(&entry
->skb_list
, rx
->skb
);
2350 entry
->last_frag
= frag
;
2351 entry
->extra_len
+= rx
->skb
->len
;
2352 if (ieee80211_has_morefrags(fc
)) {
2357 rx
->skb
= __skb_dequeue(&entry
->skb_list
);
2358 if (skb_tailroom(rx
->skb
) < entry
->extra_len
) {
2359 I802_DEBUG_INC(rx
->local
->rx_expand_skb_head_defrag
);
2360 if (unlikely(pskb_expand_head(rx
->skb
, 0, entry
->extra_len
,
2362 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
2363 __skb_queue_purge(&entry
->skb_list
);
2364 return RX_DROP_U_OOM
;
2367 while ((skb
= __skb_dequeue(&entry
->skb_list
))) {
2368 skb_put_data(rx
->skb
, skb
->data
, skb
->len
);
2373 ieee80211_led_rx(rx
->local
);
2375 rx
->link_sta
->rx_stats
.packets
++;
2379 static int ieee80211_802_1x_port_control(struct ieee80211_rx_data
*rx
)
2381 if (unlikely(!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_AUTHORIZED
)))
2387 static int ieee80211_drop_unencrypted(struct ieee80211_rx_data
*rx
, __le16 fc
)
2389 struct sk_buff
*skb
= rx
->skb
;
2390 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2393 * Pass through unencrypted frames if the hardware has
2394 * decrypted them already.
2396 if (status
->flag
& RX_FLAG_DECRYPTED
)
2399 /* Drop unencrypted frames if key is set. */
2400 if (unlikely(!ieee80211_has_protected(fc
) &&
2401 !ieee80211_is_any_nullfunc(fc
) &&
2402 ieee80211_is_data(fc
) && rx
->key
))
2408 static ieee80211_rx_result
2409 ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data
*rx
)
2411 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2412 struct ieee80211_mgmt
*mgmt
= (void *)rx
->skb
->data
;
2413 __le16 fc
= mgmt
->frame_control
;
2416 * Pass through unencrypted frames if the hardware has
2417 * decrypted them already.
2419 if (status
->flag
& RX_FLAG_DECRYPTED
)
2422 /* drop unicast protected dual (that wasn't protected) */
2423 if (ieee80211_is_action(fc
) &&
2424 mgmt
->u
.action
.category
== WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION
)
2425 return RX_DROP_U_UNPROT_DUAL
;
2427 if (rx
->sta
&& test_sta_flag(rx
->sta
, WLAN_STA_MFP
)) {
2428 if (unlikely(!ieee80211_has_protected(fc
) &&
2429 ieee80211_is_unicast_robust_mgmt_frame(rx
->skb
))) {
2430 if (ieee80211_is_deauth(fc
) ||
2431 ieee80211_is_disassoc(fc
)) {
2433 * Permit unprotected deauth/disassoc frames
2434 * during 4-way-HS (key is installed after HS).
2439 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2443 return RX_DROP_U_UNPROT_UCAST_MGMT
;
2445 /* BIP does not use Protected field, so need to check MMIE */
2446 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx
->skb
) &&
2447 ieee80211_get_mmie_keyidx(rx
->skb
) < 0)) {
2448 if (ieee80211_is_deauth(fc
) ||
2449 ieee80211_is_disassoc(fc
))
2450 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2453 return RX_DROP_U_UNPROT_MCAST_MGMT
;
2455 if (unlikely(ieee80211_is_beacon(fc
) && rx
->key
&&
2456 ieee80211_get_mmie_keyidx(rx
->skb
) < 0)) {
2457 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2460 return RX_DROP_U_UNPROT_BEACON
;
2463 * When using MFP, Action frames are not allowed prior to
2464 * having configured keys.
2466 if (unlikely(ieee80211_is_action(fc
) && !rx
->key
&&
2467 ieee80211_is_robust_mgmt_frame(rx
->skb
)))
2468 return RX_DROP_U_UNPROT_ACTION
;
2470 /* drop unicast public action frames when using MPF */
2471 if (is_unicast_ether_addr(mgmt
->da
) &&
2472 ieee80211_is_protected_dual_of_public_action(rx
->skb
))
2473 return RX_DROP_U_UNPROT_UNICAST_PUB_ACTION
;
2477 * Drop robust action frames before assoc regardless of MFP state,
2478 * after assoc we also have decided on MFP or not.
2480 if (ieee80211_is_action(fc
) &&
2481 ieee80211_is_robust_mgmt_frame(rx
->skb
) &&
2482 (!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_ASSOC
)))
2483 return RX_DROP_U_UNPROT_ROBUST_ACTION
;
2488 static ieee80211_rx_result
2489 __ieee80211_data_to_8023(struct ieee80211_rx_data
*rx
, bool *port_control
)
2491 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2492 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2493 bool check_port_control
= false;
2494 struct ethhdr
*ehdr
;
2497 *port_control
= false;
2498 if (ieee80211_has_a4(hdr
->frame_control
) &&
2499 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& !sdata
->u
.vlan
.sta
)
2500 return RX_DROP_U_UNEXPECTED_VLAN_4ADDR
;
2502 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
2503 !!sdata
->u
.mgd
.use_4addr
!= !!ieee80211_has_a4(hdr
->frame_control
)) {
2504 if (!sdata
->u
.mgd
.use_4addr
)
2505 return RX_DROP_U_UNEXPECTED_STA_4ADDR
;
2506 else if (!ether_addr_equal(hdr
->addr1
, sdata
->vif
.addr
))
2507 check_port_control
= true;
2510 if (is_multicast_ether_addr(hdr
->addr1
) &&
2511 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& sdata
->u
.vlan
.sta
)
2512 return RX_DROP_U_UNEXPECTED_VLAN_MCAST
;
2514 ret
= ieee80211_data_to_8023(rx
->skb
, sdata
->vif
.addr
, sdata
->vif
.type
);
2516 return RX_DROP_U_INVALID_8023
;
2518 ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2519 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
)
2520 *port_control
= true;
2521 else if (check_port_control
)
2522 return RX_DROP_U_NOT_PORT_CONTROL
;
2527 bool ieee80211_is_our_addr(struct ieee80211_sub_if_data
*sdata
,
2528 const u8
*addr
, int *out_link_id
)
2530 unsigned int link_id
;
2532 /* non-MLO, or MLD address replaced by hardware */
2533 if (ether_addr_equal(sdata
->vif
.addr
, addr
))
2536 if (!ieee80211_vif_is_mld(&sdata
->vif
))
2539 for (link_id
= 0; link_id
< ARRAY_SIZE(sdata
->vif
.link_conf
); link_id
++) {
2540 struct ieee80211_bss_conf
*conf
;
2542 conf
= rcu_dereference(sdata
->vif
.link_conf
[link_id
]);
2546 if (ether_addr_equal(conf
->addr
, addr
)) {
2548 *out_link_id
= link_id
;
2557 * requires that rx->skb is a frame with ethernet header
2559 static bool ieee80211_frame_allowed(struct ieee80211_rx_data
*rx
, __le16 fc
)
2561 static const u8 pae_group_addr
[ETH_ALEN
] __aligned(2)
2562 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
2563 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2566 * Allow EAPOL frames to us/the PAE group address regardless of
2567 * whether the frame was encrypted or not, and always disallow
2568 * all other destination addresses for them.
2570 if (unlikely(ehdr
->h_proto
== rx
->sdata
->control_port_protocol
))
2571 return ieee80211_is_our_addr(rx
->sdata
, ehdr
->h_dest
, NULL
) ||
2572 ether_addr_equal(ehdr
->h_dest
, pae_group_addr
);
2574 if (ieee80211_802_1x_port_control(rx
) ||
2575 ieee80211_drop_unencrypted(rx
, fc
))
2581 static void ieee80211_deliver_skb_to_local_stack(struct sk_buff
*skb
,
2582 struct ieee80211_rx_data
*rx
)
2584 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2585 struct net_device
*dev
= sdata
->dev
;
2587 if (unlikely((skb
->protocol
== sdata
->control_port_protocol
||
2588 (skb
->protocol
== cpu_to_be16(ETH_P_PREAUTH
) &&
2589 !sdata
->control_port_no_preauth
)) &&
2590 sdata
->control_port_over_nl80211
)) {
2591 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2592 bool noencrypt
= !(status
->flag
& RX_FLAG_DECRYPTED
);
2594 cfg80211_rx_control_port(dev
, skb
, noencrypt
, rx
->link_id
);
2597 struct ethhdr
*ehdr
= (void *)skb_mac_header(skb
);
2599 memset(skb
->cb
, 0, sizeof(skb
->cb
));
2602 * 802.1X over 802.11 requires that the authenticator address
2603 * be used for EAPOL frames. However, 802.1X allows the use of
2604 * the PAE group address instead. If the interface is part of
2605 * a bridge and we pass the frame with the PAE group address,
2606 * then the bridge will forward it to the network (even if the
2607 * client was not associated yet), which isn't supposed to
2609 * To avoid that, rewrite the destination address to our own
2610 * address, so that the authenticator (e.g. hostapd) will see
2611 * the frame, but bridge won't forward it anywhere else. Note
2612 * that due to earlier filtering, the only other address can
2613 * be the PAE group address, unless the hardware allowed them
2614 * through in 802.3 offloaded mode.
2616 if (unlikely(skb
->protocol
== sdata
->control_port_protocol
&&
2617 !ether_addr_equal(ehdr
->h_dest
, sdata
->vif
.addr
)))
2618 ether_addr_copy(ehdr
->h_dest
, sdata
->vif
.addr
);
2620 /* deliver to local stack */
2622 list_add_tail(&skb
->list
, rx
->list
);
2624 netif_receive_skb(skb
);
2629 * requires that rx->skb is a frame with ethernet header
2632 ieee80211_deliver_skb(struct ieee80211_rx_data
*rx
)
2634 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2635 struct net_device
*dev
= sdata
->dev
;
2636 struct sk_buff
*skb
, *xmit_skb
;
2637 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2638 struct sta_info
*dsta
;
2643 dev_sw_netstats_rx_add(dev
, skb
->len
);
2646 /* The seqno index has the same property as needed
2647 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
2648 * for non-QoS-data frames. Here we know it's a data
2649 * frame, so count MSDUs.
2651 u64_stats_update_begin(&rx
->link_sta
->rx_stats
.syncp
);
2652 rx
->link_sta
->rx_stats
.msdu
[rx
->seqno_idx
]++;
2653 u64_stats_update_end(&rx
->link_sta
->rx_stats
.syncp
);
2656 if ((sdata
->vif
.type
== NL80211_IFTYPE_AP
||
2657 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) &&
2658 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
2659 ehdr
->h_proto
!= rx
->sdata
->control_port_protocol
&&
2660 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
|| !sdata
->u
.vlan
.sta
)) {
2661 if (is_multicast_ether_addr(ehdr
->h_dest
) &&
2662 ieee80211_vif_get_num_mcast_if(sdata
) != 0) {
2664 * send multicast frames both to higher layers in
2665 * local net stack and back to the wireless medium
2667 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
2669 net_info_ratelimited("%s: failed to clone multicast frame\n",
2671 } else if (!is_multicast_ether_addr(ehdr
->h_dest
) &&
2672 !ether_addr_equal(ehdr
->h_dest
, ehdr
->h_source
)) {
2673 dsta
= sta_info_get(sdata
, ehdr
->h_dest
);
2676 * The destination station is associated to
2677 * this AP (in this VLAN), so send the frame
2678 * directly to it and do not pass it to local
2687 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
2689 /* 'align' will only take the values 0 or 2 here since all
2690 * frames are required to be aligned to 2-byte boundaries
2691 * when being passed to mac80211; the code here works just
2692 * as well if that isn't true, but mac80211 assumes it can
2693 * access fields as 2-byte aligned (e.g. for ether_addr_equal)
2697 align
= (unsigned long)(skb
->data
+ sizeof(struct ethhdr
)) & 3;
2699 if (WARN_ON(skb_headroom(skb
) < 3)) {
2703 u8
*data
= skb
->data
;
2704 size_t len
= skb_headlen(skb
);
2706 memmove(skb
->data
, data
, len
);
2707 skb_set_tail_pointer(skb
, len
);
2714 skb
->protocol
= eth_type_trans(skb
, dev
);
2715 ieee80211_deliver_skb_to_local_stack(skb
, rx
);
2720 * Send to wireless media and increase priority by 256 to
2721 * keep the received priority instead of reclassifying
2722 * the frame (see cfg80211_classify8021d).
2724 xmit_skb
->priority
+= 256;
2725 xmit_skb
->protocol
= htons(ETH_P_802_3
);
2726 skb_reset_network_header(xmit_skb
);
2727 skb_reset_mac_header(xmit_skb
);
2728 dev_queue_xmit(xmit_skb
);
2732 #ifdef CONFIG_MAC80211_MESH
2734 ieee80211_rx_mesh_fast_forward(struct ieee80211_sub_if_data
*sdata
,
2735 struct sk_buff
*skb
, int hdrlen
)
2737 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2738 struct ieee80211_mesh_fast_tx
*entry
= NULL
;
2739 struct ieee80211s_hdr
*mesh_hdr
;
2740 struct tid_ampdu_tx
*tid_tx
;
2741 struct sta_info
*sta
;
2745 mesh_hdr
= (struct ieee80211s_hdr
*)(skb
->data
+ sizeof(eth
));
2746 if ((mesh_hdr
->flags
& MESH_FLAGS_AE
) == MESH_FLAGS_AE_A5_A6
)
2747 entry
= mesh_fast_tx_get(sdata
, mesh_hdr
->eaddr1
);
2748 else if (!(mesh_hdr
->flags
& MESH_FLAGS_AE
))
2749 entry
= mesh_fast_tx_get(sdata
, skb
->data
);
2753 sta
= rcu_dereference(entry
->mpath
->next_hop
);
2757 if (skb_linearize(skb
))
2760 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
2761 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[tid
]);
2763 if (!test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
))
2766 if (tid_tx
->timeout
)
2767 tid_tx
->last_tx
= jiffies
;
2770 ieee80211_aggr_check(sdata
, sta
, skb
);
2772 if (ieee80211_get_8023_tunnel_proto(skb
->data
+ hdrlen
,
2776 skb
->protocol
= htons(skb
->len
- hdrlen
);
2777 skb_set_network_header(skb
, hdrlen
+ 2);
2779 skb
->dev
= sdata
->dev
;
2780 memcpy(ð
, skb
->data
, ETH_HLEN
- 2);
2782 __ieee80211_xmit_fast(sdata
, sta
, &entry
->fast_tx
, skb
, tid_tx
,
2783 eth
.h_dest
, eth
.h_source
);
2784 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_unicast
);
2785 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_frames
);
2791 static ieee80211_rx_result
2792 ieee80211_rx_mesh_data(struct ieee80211_sub_if_data
*sdata
, struct sta_info
*sta
,
2793 struct sk_buff
*skb
)
2795 #ifdef CONFIG_MAC80211_MESH
2796 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2797 struct ieee80211_local
*local
= sdata
->local
;
2798 uint16_t fc
= IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_QOS_DATA
;
2799 struct ieee80211_hdr hdr
= {
2800 .frame_control
= cpu_to_le16(fc
)
2802 struct ieee80211_hdr
*fwd_hdr
;
2803 struct ieee80211s_hdr
*mesh_hdr
;
2804 struct ieee80211_tx_info
*info
;
2805 struct sk_buff
*fwd_skb
;
2809 int hdrlen
, mesh_hdrlen
;
2812 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
2815 if (!pskb_may_pull(skb
, sizeof(*eth
) + 6))
2816 return RX_DROP_MONITOR
;
2818 mesh_hdr
= (struct ieee80211s_hdr
*)(skb
->data
+ sizeof(*eth
));
2819 mesh_hdrlen
= ieee80211_get_mesh_hdrlen(mesh_hdr
);
2821 if (!pskb_may_pull(skb
, sizeof(*eth
) + mesh_hdrlen
))
2822 return RX_DROP_MONITOR
;
2824 eth
= (struct ethhdr
*)skb
->data
;
2825 multicast
= is_multicast_ether_addr(eth
->h_dest
);
2827 mesh_hdr
= (struct ieee80211s_hdr
*)(eth
+ 1);
2829 return RX_DROP_MONITOR
;
2831 /* frame is in RMC, don't forward */
2832 if (is_multicast_ether_addr(eth
->h_dest
) &&
2833 mesh_rmc_check(sdata
, eth
->h_source
, mesh_hdr
))
2834 return RX_DROP_MONITOR
;
2836 /* forward packet */
2837 if (sdata
->crypto_tx_tailroom_needed_cnt
)
2838 tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
2840 if (mesh_hdr
->flags
& MESH_FLAGS_AE
) {
2841 struct mesh_path
*mppath
;
2843 bool update
= false;
2846 proxied_addr
= mesh_hdr
->eaddr1
;
2847 else if ((mesh_hdr
->flags
& MESH_FLAGS_AE
) == MESH_FLAGS_AE_A5_A6
)
2848 /* has_a4 already checked in ieee80211_rx_mesh_check */
2849 proxied_addr
= mesh_hdr
->eaddr2
;
2851 return RX_DROP_MONITOR
;
2854 mppath
= mpp_path_lookup(sdata
, proxied_addr
);
2856 mpp_path_add(sdata
, proxied_addr
, eth
->h_source
);
2858 spin_lock_bh(&mppath
->state_lock
);
2859 if (!ether_addr_equal(mppath
->mpp
, eth
->h_source
)) {
2860 memcpy(mppath
->mpp
, eth
->h_source
, ETH_ALEN
);
2863 mppath
->exp_time
= jiffies
;
2864 spin_unlock_bh(&mppath
->state_lock
);
2867 /* flush fast xmit cache if the address path changed */
2869 mesh_fast_tx_flush_addr(sdata
, proxied_addr
);
2874 /* Frame has reached destination. Don't forward */
2875 if (ether_addr_equal(sdata
->vif
.addr
, eth
->h_dest
))
2878 if (!--mesh_hdr
->ttl
) {
2882 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_ttl
);
2883 return RX_DROP_MONITOR
;
2886 if (!ifmsh
->mshcfg
.dot11MeshForwarding
) {
2887 if (is_multicast_ether_addr(eth
->h_dest
))
2890 return RX_DROP_MONITOR
;
2893 skb_set_queue_mapping(skb
, ieee802_1d_to_ac
[skb
->priority
]);
2896 ieee80211_rx_mesh_fast_forward(sdata
, skb
, mesh_hdrlen
))
2899 ieee80211_fill_mesh_addresses(&hdr
, &hdr
.frame_control
,
2900 eth
->h_dest
, eth
->h_source
);
2901 hdrlen
= ieee80211_hdrlen(hdr
.frame_control
);
2903 int extra_head
= sizeof(struct ieee80211_hdr
) - sizeof(*eth
);
2905 fwd_skb
= skb_copy_expand(skb
, local
->tx_headroom
+ extra_head
+
2906 IEEE80211_ENCRYPT_HEADROOM
,
2907 tailroom
, GFP_ATOMIC
);
2914 if (skb_cow_head(fwd_skb
, hdrlen
- sizeof(struct ethhdr
)))
2915 return RX_DROP_U_OOM
;
2917 if (skb_linearize(fwd_skb
))
2918 return RX_DROP_U_OOM
;
2921 fwd_hdr
= skb_push(fwd_skb
, hdrlen
- sizeof(struct ethhdr
));
2922 memcpy(fwd_hdr
, &hdr
, hdrlen
- 2);
2923 qos
= ieee80211_get_qos_ctl(fwd_hdr
);
2924 qos
[0] = qos
[1] = 0;
2926 skb_reset_mac_header(fwd_skb
);
2927 hdrlen
+= mesh_hdrlen
;
2928 if (ieee80211_get_8023_tunnel_proto(fwd_skb
->data
+ hdrlen
,
2929 &fwd_skb
->protocol
))
2932 fwd_skb
->protocol
= htons(fwd_skb
->len
- hdrlen
);
2933 skb_set_network_header(fwd_skb
, hdrlen
+ 2);
2935 info
= IEEE80211_SKB_CB(fwd_skb
);
2936 memset(info
, 0, sizeof(*info
));
2937 info
->control
.flags
|= IEEE80211_TX_INTCFL_NEED_TXPROCESSING
;
2938 info
->control
.vif
= &sdata
->vif
;
2939 info
->control
.jiffies
= jiffies
;
2940 fwd_skb
->dev
= sdata
->dev
;
2942 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_mcast
);
2943 memcpy(fwd_hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2944 /* update power mode indication when forwarding */
2945 ieee80211_mps_set_frame_flags(sdata
, NULL
, fwd_hdr
);
2946 } else if (!mesh_nexthop_lookup(sdata
, fwd_skb
)) {
2947 /* mesh power mode flags updated in mesh_nexthop_lookup */
2948 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_unicast
);
2950 /* unable to resolve next hop */
2952 mesh_path_error_tx(sdata
, ifmsh
->mshcfg
.element_ttl
,
2954 WLAN_REASON_MESH_PATH_NOFORWARD
,
2956 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_no_route
);
2961 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_frames
);
2962 ieee80211_add_pending_skb(local
, fwd_skb
);
2968 ieee80211_strip_8023_mesh_hdr(skb
);
2974 static ieee80211_rx_result debug_noinline
2975 __ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
, u8 data_offset
)
2977 struct net_device
*dev
= rx
->sdata
->dev
;
2978 struct sk_buff
*skb
= rx
->skb
;
2979 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
2980 __le16 fc
= hdr
->frame_control
;
2981 struct sk_buff_head frame_list
;
2982 ieee80211_rx_result res
;
2983 struct ethhdr ethhdr
;
2984 const u8
*check_da
= ethhdr
.h_dest
, *check_sa
= ethhdr
.h_source
;
2986 if (unlikely(ieee80211_has_a4(hdr
->frame_control
))) {
2989 } else switch (rx
->sdata
->vif
.type
) {
2990 case NL80211_IFTYPE_AP
:
2991 case NL80211_IFTYPE_AP_VLAN
:
2994 case NL80211_IFTYPE_STATION
:
2996 !test_sta_flag(rx
->sta
, WLAN_STA_TDLS_PEER
))
2999 case NL80211_IFTYPE_MESH_POINT
:
3008 __skb_queue_head_init(&frame_list
);
3010 if (ieee80211_data_to_8023_exthdr(skb
, ðhdr
,
3011 rx
->sdata
->vif
.addr
,
3012 rx
->sdata
->vif
.type
,
3014 return RX_DROP_U_BAD_AMSDU
;
3016 if (rx
->sta
->amsdu_mesh_control
< 0) {
3020 for (i
= 0; i
<= 2; i
++) {
3021 if (!ieee80211_is_valid_amsdu(skb
, i
))
3033 rx
->sta
->amsdu_mesh_control
= valid
;
3036 ieee80211_amsdu_to_8023s(skb
, &frame_list
, dev
->dev_addr
,
3037 rx
->sdata
->vif
.type
,
3038 rx
->local
->hw
.extra_tx_headroom
,
3040 rx
->sta
->amsdu_mesh_control
);
3042 while (!skb_queue_empty(&frame_list
)) {
3043 rx
->skb
= __skb_dequeue(&frame_list
);
3045 res
= ieee80211_rx_mesh_data(rx
->sdata
, rx
->sta
, rx
->skb
);
3055 if (!ieee80211_frame_allowed(rx
, fc
))
3058 ieee80211_deliver_skb(rx
);
3062 dev_kfree_skb(rx
->skb
);
3068 static ieee80211_rx_result debug_noinline
3069 ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
)
3071 struct sk_buff
*skb
= rx
->skb
;
3072 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3073 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
3074 __le16 fc
= hdr
->frame_control
;
3076 if (!(status
->rx_flags
& IEEE80211_RX_AMSDU
))
3079 if (unlikely(!ieee80211_is_data(fc
)))
3082 if (unlikely(!ieee80211_is_data_present(fc
)))
3083 return RX_DROP_MONITOR
;
3085 if (unlikely(ieee80211_has_a4(hdr
->frame_control
))) {
3086 switch (rx
->sdata
->vif
.type
) {
3087 case NL80211_IFTYPE_AP_VLAN
:
3088 if (!rx
->sdata
->u
.vlan
.sta
)
3089 return RX_DROP_U_BAD_4ADDR
;
3091 case NL80211_IFTYPE_STATION
:
3092 if (!rx
->sdata
->u
.mgd
.use_4addr
)
3093 return RX_DROP_U_BAD_4ADDR
;
3095 case NL80211_IFTYPE_MESH_POINT
:
3098 return RX_DROP_U_BAD_4ADDR
;
3102 if (is_multicast_ether_addr(hdr
->addr1
) || !rx
->sta
)
3103 return RX_DROP_U_BAD_AMSDU
;
3107 * We should not receive A-MSDUs on pre-HT connections,
3108 * and HT connections cannot use old ciphers. Thus drop
3109 * them, as in those cases we couldn't even have SPP
3112 switch (rx
->key
->conf
.cipher
) {
3113 case WLAN_CIPHER_SUITE_WEP40
:
3114 case WLAN_CIPHER_SUITE_WEP104
:
3115 case WLAN_CIPHER_SUITE_TKIP
:
3116 return RX_DROP_U_BAD_AMSDU_CIPHER
;
3122 return __ieee80211_rx_h_amsdu(rx
, 0);
3125 static ieee80211_rx_result debug_noinline
3126 ieee80211_rx_h_data(struct ieee80211_rx_data
*rx
)
3128 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3129 struct ieee80211_local
*local
= rx
->local
;
3130 struct net_device
*dev
= sdata
->dev
;
3131 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
3132 __le16 fc
= hdr
->frame_control
;
3133 ieee80211_rx_result res
;
3136 if (unlikely(!ieee80211_is_data(hdr
->frame_control
)))
3139 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
3140 return RX_DROP_MONITOR
;
3143 * Send unexpected-4addr-frame event to hostapd. For older versions,
3144 * also drop the frame to cooked monitor interfaces.
3146 if (ieee80211_has_a4(hdr
->frame_control
) &&
3147 sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
3149 !test_and_set_sta_flag(rx
->sta
, WLAN_STA_4ADDR_EVENT
))
3150 cfg80211_rx_unexpected_4addr_frame(
3151 rx
->sdata
->dev
, rx
->sta
->sta
.addr
, GFP_ATOMIC
);
3152 return RX_DROP_MONITOR
;
3155 res
= __ieee80211_data_to_8023(rx
, &port_control
);
3156 if (unlikely(res
!= RX_CONTINUE
))
3159 res
= ieee80211_rx_mesh_data(rx
->sdata
, rx
->sta
, rx
->skb
);
3160 if (res
!= RX_CONTINUE
)
3163 if (!ieee80211_frame_allowed(rx
, fc
))
3164 return RX_DROP_MONITOR
;
3166 /* directly handle TDLS channel switch requests/responses */
3167 if (unlikely(((struct ethhdr
*)rx
->skb
->data
)->h_proto
==
3168 cpu_to_be16(ETH_P_TDLS
))) {
3169 struct ieee80211_tdls_data
*tf
= (void *)rx
->skb
->data
;
3171 if (pskb_may_pull(rx
->skb
,
3172 offsetof(struct ieee80211_tdls_data
, u
)) &&
3173 tf
->payload_type
== WLAN_TDLS_SNAP_RFTYPE
&&
3174 tf
->category
== WLAN_CATEGORY_TDLS
&&
3175 (tf
->action_code
== WLAN_TDLS_CHANNEL_SWITCH_REQUEST
||
3176 tf
->action_code
== WLAN_TDLS_CHANNEL_SWITCH_RESPONSE
)) {
3177 rx
->skb
->protocol
= cpu_to_be16(ETH_P_TDLS
);
3178 __ieee80211_queue_skb_to_iface(sdata
, rx
->link_id
,
3184 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
3185 unlikely(port_control
) && sdata
->bss
) {
3186 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
3194 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
) &&
3195 local
->ps_sdata
&& local
->hw
.conf
.dynamic_ps_timeout
> 0 &&
3196 !is_multicast_ether_addr(
3197 ((struct ethhdr
*)rx
->skb
->data
)->h_dest
) &&
3198 (!local
->scanning
&&
3199 !test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
)))
3200 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
3201 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
3203 ieee80211_deliver_skb(rx
);
3208 static ieee80211_rx_result debug_noinline
3209 ieee80211_rx_h_ctrl(struct ieee80211_rx_data
*rx
, struct sk_buff_head
*frames
)
3211 struct sk_buff
*skb
= rx
->skb
;
3212 struct ieee80211_bar
*bar
= (struct ieee80211_bar
*)skb
->data
;
3213 struct tid_ampdu_rx
*tid_agg_rx
;
3217 if (likely(!ieee80211_is_ctl(bar
->frame_control
)))
3220 if (ieee80211_is_back_req(bar
->frame_control
)) {
3222 __le16 control
, start_seq_num
;
3223 } __packed bar_data
;
3224 struct ieee80211_event event
= {
3225 .type
= BAR_RX_EVENT
,
3229 return RX_DROP_MONITOR
;
3231 if (skb_copy_bits(skb
, offsetof(struct ieee80211_bar
, control
),
3232 &bar_data
, sizeof(bar_data
)))
3233 return RX_DROP_MONITOR
;
3235 tid
= le16_to_cpu(bar_data
.control
) >> 12;
3237 if (!test_bit(tid
, rx
->sta
->ampdu_mlme
.agg_session_valid
) &&
3238 !test_and_set_bit(tid
, rx
->sta
->ampdu_mlme
.unexpected_agg
))
3239 ieee80211_send_delba(rx
->sdata
, rx
->sta
->sta
.addr
, tid
,
3240 WLAN_BACK_RECIPIENT
,
3241 WLAN_REASON_QSTA_REQUIRE_SETUP
);
3243 tid_agg_rx
= rcu_dereference(rx
->sta
->ampdu_mlme
.tid_rx
[tid
]);
3245 return RX_DROP_MONITOR
;
3247 start_seq_num
= le16_to_cpu(bar_data
.start_seq_num
) >> 4;
3248 event
.u
.ba
.tid
= tid
;
3249 event
.u
.ba
.ssn
= start_seq_num
;
3250 event
.u
.ba
.sta
= &rx
->sta
->sta
;
3252 /* reset session timer */
3253 if (tid_agg_rx
->timeout
)
3254 mod_timer(&tid_agg_rx
->session_timer
,
3255 TU_TO_EXP_TIME(tid_agg_rx
->timeout
));
3257 spin_lock(&tid_agg_rx
->reorder_lock
);
3258 /* release stored frames up to start of BAR */
3259 ieee80211_release_reorder_frames(rx
->sdata
, tid_agg_rx
,
3260 start_seq_num
, frames
);
3261 spin_unlock(&tid_agg_rx
->reorder_lock
);
3263 drv_event_callback(rx
->local
, rx
->sdata
, &event
);
3270 * After this point, we only want management frames,
3271 * so we can drop all remaining control frames to
3272 * cooked monitor interfaces.
3274 return RX_DROP_MONITOR
;
3277 static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data
*sdata
,
3278 struct ieee80211_mgmt
*mgmt
,
3281 struct ieee80211_local
*local
= sdata
->local
;
3282 struct sk_buff
*skb
;
3283 struct ieee80211_mgmt
*resp
;
3285 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
)) {
3286 /* Not to own unicast address */
3290 if (!ether_addr_equal(mgmt
->sa
, sdata
->deflink
.u
.mgd
.bssid
) ||
3291 !ether_addr_equal(mgmt
->bssid
, sdata
->deflink
.u
.mgd
.bssid
)) {
3292 /* Not from the current AP or not associated yet. */
3296 if (len
< 24 + 1 + sizeof(resp
->u
.action
.u
.sa_query
)) {
3297 /* Too short SA Query request frame */
3301 skb
= dev_alloc_skb(sizeof(*resp
) + local
->hw
.extra_tx_headroom
);
3305 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
3306 resp
= skb_put_zero(skb
, 24);
3307 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
3308 memcpy(resp
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
3309 memcpy(resp
->bssid
, sdata
->deflink
.u
.mgd
.bssid
, ETH_ALEN
);
3310 resp
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
3311 IEEE80211_STYPE_ACTION
);
3312 skb_put(skb
, 1 + sizeof(resp
->u
.action
.u
.sa_query
));
3313 resp
->u
.action
.category
= WLAN_CATEGORY_SA_QUERY
;
3314 resp
->u
.action
.u
.sa_query
.action
= WLAN_ACTION_SA_QUERY_RESPONSE
;
3315 memcpy(resp
->u
.action
.u
.sa_query
.trans_id
,
3316 mgmt
->u
.action
.u
.sa_query
.trans_id
,
3317 WLAN_SA_QUERY_TR_ID_LEN
);
3319 ieee80211_tx_skb(sdata
, skb
);
3323 ieee80211_rx_check_bss_color_collision(struct ieee80211_rx_data
*rx
)
3325 struct ieee80211_mgmt
*mgmt
= (void *)rx
->skb
->data
;
3326 const struct element
*ie
;
3329 if (!wiphy_ext_feature_isset(rx
->local
->hw
.wiphy
,
3330 NL80211_EXT_FEATURE_BSS_COLOR
))
3333 if (ieee80211_hw_check(&rx
->local
->hw
, DETECTS_COLOR_COLLISION
))
3336 if (rx
->sdata
->vif
.bss_conf
.csa_active
)
3339 baselen
= mgmt
->u
.beacon
.variable
- rx
->skb
->data
;
3340 if (baselen
> rx
->skb
->len
)
3343 ie
= cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION
,
3344 mgmt
->u
.beacon
.variable
,
3345 rx
->skb
->len
- baselen
);
3346 if (ie
&& ie
->datalen
>= sizeof(struct ieee80211_he_operation
) &&
3347 ie
->datalen
>= ieee80211_he_oper_size(ie
->data
+ 1)) {
3348 struct ieee80211_bss_conf
*bss_conf
= &rx
->sdata
->vif
.bss_conf
;
3349 const struct ieee80211_he_operation
*he_oper
;
3352 he_oper
= (void *)(ie
->data
+ 1);
3353 if (le32_get_bits(he_oper
->he_oper_params
,
3354 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED
))
3357 color
= le32_get_bits(he_oper
->he_oper_params
,
3358 IEEE80211_HE_OPERATION_BSS_COLOR_MASK
);
3359 if (color
== bss_conf
->he_bss_color
.color
)
3360 ieee80211_obss_color_collision_notify(&rx
->sdata
->vif
,
3366 static ieee80211_rx_result debug_noinline
3367 ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data
*rx
)
3369 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3370 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3372 if (ieee80211_is_s1g_beacon(mgmt
->frame_control
))
3376 * From here on, look only at management frames.
3377 * Data and control frames are already handled,
3378 * and unknown (reserved) frames are useless.
3380 if (rx
->skb
->len
< 24)
3381 return RX_DROP_MONITOR
;
3383 if (!ieee80211_is_mgmt(mgmt
->frame_control
))
3384 return RX_DROP_MONITOR
;
3386 /* drop too small action frames */
3387 if (ieee80211_is_action(mgmt
->frame_control
) &&
3388 rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
)
3389 return RX_DROP_U_RUNT_ACTION
;
3391 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
3392 ieee80211_is_beacon(mgmt
->frame_control
) &&
3393 !(rx
->flags
& IEEE80211_RX_BEACON_REPORTED
)) {
3396 /* sw bss color collision detection */
3397 ieee80211_rx_check_bss_color_collision(rx
);
3399 if (ieee80211_hw_check(&rx
->local
->hw
, SIGNAL_DBM
) &&
3400 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
))
3401 sig
= status
->signal
;
3403 cfg80211_report_obss_beacon_khz(rx
->local
->hw
.wiphy
,
3404 rx
->skb
->data
, rx
->skb
->len
,
3405 ieee80211_rx_status_to_khz(status
),
3407 rx
->flags
|= IEEE80211_RX_BEACON_REPORTED
;
3410 return ieee80211_drop_unencrypted_mgmt(rx
);
3414 ieee80211_process_rx_twt_action(struct ieee80211_rx_data
*rx
)
3416 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*)rx
->skb
->data
;
3417 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3419 /* TWT actions are only supported in AP for the moment */
3420 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
3423 if (!rx
->local
->ops
->add_twt_setup
)
3426 if (!sdata
->vif
.bss_conf
.twt_responder
)
3432 switch (mgmt
->u
.action
.u
.s1g
.action_code
) {
3433 case WLAN_S1G_TWT_SETUP
: {
3434 struct ieee80211_twt_setup
*twt
;
3436 if (rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
+
3437 1 + /* action code */
3438 sizeof(struct ieee80211_twt_setup
) +
3439 2 /* TWT req_type agrt */)
3442 twt
= (void *)mgmt
->u
.action
.u
.s1g
.variable
;
3443 if (twt
->element_id
!= WLAN_EID_S1G_TWT
)
3446 if (rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
+
3447 4 + /* action code + token + tlv */
3451 return true; /* queue the frame */
3453 case WLAN_S1G_TWT_TEARDOWN
:
3454 if (rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
3457 return true; /* queue the frame */
3465 static ieee80211_rx_result debug_noinline
3466 ieee80211_rx_h_action(struct ieee80211_rx_data
*rx
)
3468 struct ieee80211_local
*local
= rx
->local
;
3469 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3470 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3471 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3472 int len
= rx
->skb
->len
;
3474 if (!ieee80211_is_action(mgmt
->frame_control
))
3477 if (!rx
->sta
&& mgmt
->u
.action
.category
!= WLAN_CATEGORY_PUBLIC
&&
3478 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SELF_PROTECTED
&&
3479 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SPECTRUM_MGMT
)
3480 return RX_DROP_U_ACTION_UNKNOWN_SRC
;
3482 switch (mgmt
->u
.action
.category
) {
3483 case WLAN_CATEGORY_HT
:
3484 /* reject HT action frames from stations not supporting HT */
3485 if (!rx
->link_sta
->pub
->ht_cap
.ht_supported
)
3488 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3489 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3490 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3491 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3492 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3495 /* verify action & smps_control/chanwidth are present */
3496 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
3499 switch (mgmt
->u
.action
.u
.ht_smps
.action
) {
3500 case WLAN_HT_ACTION_SMPS
: {
3501 struct ieee80211_supported_band
*sband
;
3502 enum ieee80211_smps_mode smps_mode
;
3503 struct sta_opmode_info sta_opmode
= {};
3505 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3506 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
)
3509 /* convert to HT capability */
3510 switch (mgmt
->u
.action
.u
.ht_smps
.smps_control
) {
3511 case WLAN_HT_SMPS_CONTROL_DISABLED
:
3512 smps_mode
= IEEE80211_SMPS_OFF
;
3514 case WLAN_HT_SMPS_CONTROL_STATIC
:
3515 smps_mode
= IEEE80211_SMPS_STATIC
;
3517 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
3518 smps_mode
= IEEE80211_SMPS_DYNAMIC
;
3524 /* if no change do nothing */
3525 if (rx
->link_sta
->pub
->smps_mode
== smps_mode
)
3527 rx
->link_sta
->pub
->smps_mode
= smps_mode
;
3528 sta_opmode
.smps_mode
=
3529 ieee80211_smps_mode_to_smps_mode(smps_mode
);
3530 sta_opmode
.changed
= STA_OPMODE_SMPS_MODE_CHANGED
;
3532 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3534 rate_control_rate_update(local
, sband
, rx
->sta
, 0,
3535 IEEE80211_RC_SMPS_CHANGED
);
3536 cfg80211_sta_opmode_change_notify(sdata
->dev
,
3542 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH
: {
3543 struct ieee80211_supported_band
*sband
;
3544 u8 chanwidth
= mgmt
->u
.action
.u
.ht_notify_cw
.chanwidth
;
3545 enum ieee80211_sta_rx_bandwidth max_bw
, new_bw
;
3546 struct sta_opmode_info sta_opmode
= {};
3548 /* If it doesn't support 40 MHz it can't change ... */
3549 if (!(rx
->link_sta
->pub
->ht_cap
.cap
&
3550 IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
3553 if (chanwidth
== IEEE80211_HT_CHANWIDTH_20MHZ
)
3554 max_bw
= IEEE80211_STA_RX_BW_20
;
3556 max_bw
= ieee80211_sta_cap_rx_bw(rx
->link_sta
);
3558 /* set cur_max_bandwidth and recalc sta bw */
3559 rx
->link_sta
->cur_max_bandwidth
= max_bw
;
3560 new_bw
= ieee80211_sta_cur_vht_bw(rx
->link_sta
);
3562 if (rx
->link_sta
->pub
->bandwidth
== new_bw
)
3565 rx
->link_sta
->pub
->bandwidth
= new_bw
;
3566 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3568 ieee80211_sta_rx_bw_to_chan_width(rx
->link_sta
);
3569 sta_opmode
.changed
= STA_OPMODE_MAX_BW_CHANGED
;
3571 rate_control_rate_update(local
, sband
, rx
->sta
, 0,
3572 IEEE80211_RC_BW_CHANGED
);
3573 cfg80211_sta_opmode_change_notify(sdata
->dev
,
3584 case WLAN_CATEGORY_PUBLIC
:
3585 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3587 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3591 if (!ether_addr_equal(mgmt
->bssid
, sdata
->deflink
.u
.mgd
.bssid
))
3593 if (mgmt
->u
.action
.u
.ext_chan_switch
.action_code
!=
3594 WLAN_PUB_ACTION_EXT_CHANSW_ANN
)
3596 if (len
< offsetof(struct ieee80211_mgmt
,
3597 u
.action
.u
.ext_chan_switch
.variable
))
3600 case WLAN_CATEGORY_VHT
:
3601 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3602 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3603 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3604 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3605 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3608 /* verify action code is present */
3609 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3612 switch (mgmt
->u
.action
.u
.vht_opmode_notif
.action_code
) {
3613 case WLAN_VHT_ACTION_OPMODE_NOTIF
: {
3614 /* verify opmode is present */
3615 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
3619 case WLAN_VHT_ACTION_GROUPID_MGMT
: {
3620 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 25)
3628 case WLAN_CATEGORY_BACK
:
3629 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3630 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3631 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3632 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3633 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3636 /* verify action_code is present */
3637 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3640 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
3641 case WLAN_ACTION_ADDBA_REQ
:
3642 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3643 sizeof(mgmt
->u
.action
.u
.addba_req
)))
3646 case WLAN_ACTION_ADDBA_RESP
:
3647 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3648 sizeof(mgmt
->u
.action
.u
.addba_resp
)))
3651 case WLAN_ACTION_DELBA
:
3652 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3653 sizeof(mgmt
->u
.action
.u
.delba
)))
3661 case WLAN_CATEGORY_SPECTRUM_MGMT
:
3662 /* verify action_code is present */
3663 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3666 switch (mgmt
->u
.action
.u
.measurement
.action_code
) {
3667 case WLAN_ACTION_SPCT_MSR_REQ
:
3668 if (status
->band
!= NL80211_BAND_5GHZ
)
3671 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3672 sizeof(mgmt
->u
.action
.u
.measurement
)))
3675 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3678 ieee80211_process_measurement_req(sdata
, mgmt
, len
);
3680 case WLAN_ACTION_SPCT_CHL_SWITCH
: {
3682 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3683 sizeof(mgmt
->u
.action
.u
.chan_switch
)))
3686 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3687 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3688 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
3691 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
3692 bssid
= sdata
->deflink
.u
.mgd
.bssid
;
3693 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
3694 bssid
= sdata
->u
.ibss
.bssid
;
3695 else if (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
3700 if (!ether_addr_equal(mgmt
->bssid
, bssid
))
3707 case WLAN_CATEGORY_SELF_PROTECTED
:
3708 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3709 sizeof(mgmt
->u
.action
.u
.self_prot
.action_code
)))
3712 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
3713 case WLAN_SP_MESH_PEERING_OPEN
:
3714 case WLAN_SP_MESH_PEERING_CLOSE
:
3715 case WLAN_SP_MESH_PEERING_CONFIRM
:
3716 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3718 if (sdata
->u
.mesh
.user_mpm
)
3719 /* userspace handles this frame */
3722 case WLAN_SP_MGK_INFORM
:
3723 case WLAN_SP_MGK_ACK
:
3724 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3729 case WLAN_CATEGORY_MESH_ACTION
:
3730 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3731 sizeof(mgmt
->u
.action
.u
.mesh_action
.action_code
)))
3734 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3736 if (mesh_action_is_path_sel(mgmt
) &&
3737 !mesh_path_sel_is_hwmp(sdata
))
3740 case WLAN_CATEGORY_S1G
:
3741 if (len
< offsetofend(typeof(*mgmt
),
3742 u
.action
.u
.s1g
.action_code
))
3745 switch (mgmt
->u
.action
.u
.s1g
.action_code
) {
3746 case WLAN_S1G_TWT_SETUP
:
3747 case WLAN_S1G_TWT_TEARDOWN
:
3748 if (ieee80211_process_rx_twt_action(rx
))
3760 status
->rx_flags
|= IEEE80211_RX_MALFORMED_ACTION_FRM
;
3761 /* will return in the next handlers */
3766 rx
->link_sta
->rx_stats
.packets
++;
3767 dev_kfree_skb(rx
->skb
);
3771 ieee80211_queue_skb_to_iface(sdata
, rx
->link_id
, rx
->sta
, rx
->skb
);
3775 static ieee80211_rx_result debug_noinline
3776 ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data
*rx
)
3778 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3779 struct cfg80211_rx_info info
= {
3780 .freq
= ieee80211_rx_status_to_khz(status
),
3781 .buf
= rx
->skb
->data
,
3782 .len
= rx
->skb
->len
,
3783 .link_id
= rx
->link_id
,
3784 .have_link_id
= rx
->link_id
>= 0,
3787 /* skip known-bad action frames and return them in the next handler */
3788 if (status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
)
3792 * Getting here means the kernel doesn't know how to handle
3793 * it, but maybe userspace does ... include returned frames
3794 * so userspace can register for those to know whether ones
3795 * it transmitted were processed or returned.
3798 if (ieee80211_hw_check(&rx
->local
->hw
, SIGNAL_DBM
) &&
3799 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
))
3800 info
.sig_dbm
= status
->signal
;
3802 if (ieee80211_is_timing_measurement(rx
->skb
) ||
3803 ieee80211_is_ftm(rx
->skb
)) {
3804 info
.rx_tstamp
= ktime_to_ns(skb_hwtstamps(rx
->skb
)->hwtstamp
);
3805 info
.ack_tstamp
= ktime_to_ns(status
->ack_tx_hwtstamp
);
3808 if (cfg80211_rx_mgmt_ext(&rx
->sdata
->wdev
, &info
)) {
3810 rx
->link_sta
->rx_stats
.packets
++;
3811 dev_kfree_skb(rx
->skb
);
3818 static ieee80211_rx_result debug_noinline
3819 ieee80211_rx_h_action_post_userspace(struct ieee80211_rx_data
*rx
)
3821 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3822 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3823 int len
= rx
->skb
->len
;
3825 if (!ieee80211_is_action(mgmt
->frame_control
))
3828 switch (mgmt
->u
.action
.category
) {
3829 case WLAN_CATEGORY_SA_QUERY
:
3830 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3831 sizeof(mgmt
->u
.action
.u
.sa_query
)))
3834 switch (mgmt
->u
.action
.u
.sa_query
.action
) {
3835 case WLAN_ACTION_SA_QUERY_REQUEST
:
3836 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3838 ieee80211_process_sa_query_req(sdata
, mgmt
, len
);
3848 rx
->link_sta
->rx_stats
.packets
++;
3849 dev_kfree_skb(rx
->skb
);
3853 static ieee80211_rx_result debug_noinline
3854 ieee80211_rx_h_action_return(struct ieee80211_rx_data
*rx
)
3856 struct ieee80211_local
*local
= rx
->local
;
3857 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3858 struct sk_buff
*nskb
;
3859 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3860 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3862 if (!ieee80211_is_action(mgmt
->frame_control
))
3866 * For AP mode, hostapd is responsible for handling any action
3867 * frames that we didn't handle, including returning unknown
3868 * ones. For all other modes we will return them to the sender,
3869 * setting the 0x80 bit in the action category, as required by
3870 * 802.11-2012 9.24.4.
3871 * Newer versions of hostapd shall also use the management frame
3872 * registration mechanisms, but older ones still use cooked
3873 * monitor interfaces so push all frames there.
3875 if (!(status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
) &&
3876 (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
3877 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
3878 return RX_DROP_MONITOR
;
3880 if (is_multicast_ether_addr(mgmt
->da
))
3881 return RX_DROP_MONITOR
;
3883 /* do not return rejected action frames */
3884 if (mgmt
->u
.action
.category
& 0x80)
3885 return RX_DROP_U_REJECTED_ACTION_RESPONSE
;
3887 nskb
= skb_copy_expand(rx
->skb
, local
->hw
.extra_tx_headroom
, 0,
3890 struct ieee80211_mgmt
*nmgmt
= (void *)nskb
->data
;
3892 nmgmt
->u
.action
.category
|= 0x80;
3893 memcpy(nmgmt
->da
, nmgmt
->sa
, ETH_ALEN
);
3894 memcpy(nmgmt
->sa
, rx
->sdata
->vif
.addr
, ETH_ALEN
);
3896 memset(nskb
->cb
, 0, sizeof(nskb
->cb
));
3898 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
3899 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(nskb
);
3901 info
->flags
= IEEE80211_TX_CTL_TX_OFFCHAN
|
3902 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
|
3903 IEEE80211_TX_CTL_NO_CCK_RATE
;
3904 if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
3906 local
->hw
.offchannel_tx_hw_queue
;
3909 __ieee80211_tx_skb_tid_band(rx
->sdata
, nskb
, 7, -1,
3912 dev_kfree_skb(rx
->skb
);
3916 static ieee80211_rx_result debug_noinline
3917 ieee80211_rx_h_ext(struct ieee80211_rx_data
*rx
)
3919 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3920 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
3922 if (!ieee80211_is_ext(hdr
->frame_control
))
3925 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3926 return RX_DROP_MONITOR
;
3928 /* for now only beacons are ext, so queue them */
3929 ieee80211_queue_skb_to_iface(sdata
, rx
->link_id
, rx
->sta
, rx
->skb
);
3934 static ieee80211_rx_result debug_noinline
3935 ieee80211_rx_h_mgmt(struct ieee80211_rx_data
*rx
)
3937 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3938 struct ieee80211_mgmt
*mgmt
= (void *)rx
->skb
->data
;
3941 stype
= mgmt
->frame_control
& cpu_to_le16(IEEE80211_FCTL_STYPE
);
3943 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
3944 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3945 sdata
->vif
.type
!= NL80211_IFTYPE_OCB
&&
3946 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3947 return RX_DROP_MONITOR
;
3950 case cpu_to_le16(IEEE80211_STYPE_AUTH
):
3951 case cpu_to_le16(IEEE80211_STYPE_BEACON
):
3952 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP
):
3953 /* process for all: mesh, mlme, ibss */
3955 case cpu_to_le16(IEEE80211_STYPE_DEAUTH
):
3956 if (is_multicast_ether_addr(mgmt
->da
) &&
3957 !is_broadcast_ether_addr(mgmt
->da
))
3958 return RX_DROP_MONITOR
;
3960 /* process only for station/IBSS */
3961 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3962 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3963 return RX_DROP_MONITOR
;
3965 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP
):
3966 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP
):
3967 case cpu_to_le16(IEEE80211_STYPE_DISASSOC
):
3968 if (is_multicast_ether_addr(mgmt
->da
) &&
3969 !is_broadcast_ether_addr(mgmt
->da
))
3970 return RX_DROP_MONITOR
;
3972 /* process only for station */
3973 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3974 return RX_DROP_MONITOR
;
3976 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
):
3977 /* process only for ibss and mesh */
3978 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3979 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
3980 return RX_DROP_MONITOR
;
3983 return RX_DROP_MONITOR
;
3986 ieee80211_queue_skb_to_iface(sdata
, rx
->link_id
, rx
->sta
, rx
->skb
);
3991 static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data
*rx
,
3992 struct ieee80211_rate
*rate
,
3993 ieee80211_rx_result reason
)
3995 struct ieee80211_sub_if_data
*sdata
;
3996 struct ieee80211_local
*local
= rx
->local
;
3997 struct sk_buff
*skb
= rx
->skb
, *skb2
;
3998 struct net_device
*prev_dev
= NULL
;
3999 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
4000 int needed_headroom
;
4003 * If cooked monitor has been processed already, then
4004 * don't do it again. If not, set the flag.
4006 if (rx
->flags
& IEEE80211_RX_CMNTR
)
4008 rx
->flags
|= IEEE80211_RX_CMNTR
;
4010 /* If there are no cooked monitor interfaces, just free the SKB */
4011 if (!local
->cooked_mntrs
)
4014 /* room for the radiotap header based on driver features */
4015 needed_headroom
= ieee80211_rx_radiotap_hdrlen(local
, status
, skb
);
4017 if (skb_headroom(skb
) < needed_headroom
&&
4018 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
))
4021 /* prepend radiotap information */
4022 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, needed_headroom
,
4025 skb_reset_mac_header(skb
);
4026 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
4027 skb
->pkt_type
= PACKET_OTHERHOST
;
4028 skb
->protocol
= htons(ETH_P_802_2
);
4030 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4031 if (!ieee80211_sdata_running(sdata
))
4034 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
||
4035 !(sdata
->u
.mntr
.flags
& MONITOR_FLAG_COOK_FRAMES
))
4039 skb2
= skb_clone(skb
, GFP_ATOMIC
);
4041 skb2
->dev
= prev_dev
;
4042 netif_receive_skb(skb2
);
4046 prev_dev
= sdata
->dev
;
4047 dev_sw_netstats_rx_add(sdata
->dev
, skb
->len
);
4051 skb
->dev
= prev_dev
;
4052 netif_receive_skb(skb
);
4057 kfree_skb_reason(skb
, (__force u32
)reason
);
4060 static void ieee80211_rx_handlers_result(struct ieee80211_rx_data
*rx
,
4061 ieee80211_rx_result res
)
4063 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
4064 struct ieee80211_supported_band
*sband
;
4065 struct ieee80211_rate
*rate
= NULL
;
4067 if (res
== RX_QUEUED
) {
4068 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_queued
);
4072 if (res
!= RX_CONTINUE
) {
4073 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
4075 rx
->link_sta
->rx_stats
.dropped
++;
4078 if (u32_get_bits((__force u32
)res
, SKB_DROP_REASON_SUBSYS_MASK
) ==
4079 SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE
) {
4080 kfree_skb_reason(rx
->skb
, (__force u32
)res
);
4084 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
4085 if (status
->encoding
== RX_ENC_LEGACY
)
4086 rate
= &sband
->bitrates
[status
->rate_idx
];
4088 ieee80211_rx_cooked_monitor(rx
, rate
, res
);
4091 static void ieee80211_rx_handlers(struct ieee80211_rx_data
*rx
,
4092 struct sk_buff_head
*frames
)
4094 ieee80211_rx_result res
= RX_DROP_MONITOR
;
4095 struct sk_buff
*skb
;
4097 #define CALL_RXH(rxh) \
4100 if (res != RX_CONTINUE) \
4104 /* Lock here to avoid hitting all of the data used in the RX
4105 * path (e.g. key data, station data, ...) concurrently when
4106 * a frame is released from the reorder buffer due to timeout
4107 * from the timer, potentially concurrently with RX from the
4110 spin_lock_bh(&rx
->local
->rx_path_lock
);
4112 while ((skb
= __skb_dequeue(frames
))) {
4114 * all the other fields are valid across frames
4115 * that belong to an aMPDU since they are on the
4116 * same TID from the same station
4120 if (WARN_ON_ONCE(!rx
->link
))
4123 CALL_RXH(ieee80211_rx_h_check_more_data
);
4124 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll
);
4125 CALL_RXH(ieee80211_rx_h_sta_process
);
4126 CALL_RXH(ieee80211_rx_h_decrypt
);
4127 CALL_RXH(ieee80211_rx_h_defragment
);
4128 CALL_RXH(ieee80211_rx_h_michael_mic_verify
);
4129 /* must be after MMIC verify so header is counted in MPDU mic */
4130 CALL_RXH(ieee80211_rx_h_amsdu
);
4131 CALL_RXH(ieee80211_rx_h_data
);
4133 /* special treatment -- needs the queue */
4134 res
= ieee80211_rx_h_ctrl(rx
, frames
);
4135 if (res
!= RX_CONTINUE
)
4138 CALL_RXH(ieee80211_rx_h_mgmt_check
);
4139 CALL_RXH(ieee80211_rx_h_action
);
4140 CALL_RXH(ieee80211_rx_h_userspace_mgmt
);
4141 CALL_RXH(ieee80211_rx_h_action_post_userspace
);
4142 CALL_RXH(ieee80211_rx_h_action_return
);
4143 CALL_RXH(ieee80211_rx_h_ext
);
4144 CALL_RXH(ieee80211_rx_h_mgmt
);
4147 ieee80211_rx_handlers_result(rx
, res
);
4152 spin_unlock_bh(&rx
->local
->rx_path_lock
);
4155 static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data
*rx
)
4157 struct sk_buff_head reorder_release
;
4158 ieee80211_rx_result res
= RX_DROP_MONITOR
;
4160 __skb_queue_head_init(&reorder_release
);
4162 #define CALL_RXH(rxh) \
4165 if (res != RX_CONTINUE) \
4169 CALL_RXH(ieee80211_rx_h_check_dup
);
4170 CALL_RXH(ieee80211_rx_h_check
);
4172 ieee80211_rx_reorder_ampdu(rx
, &reorder_release
);
4174 ieee80211_rx_handlers(rx
, &reorder_release
);
4178 ieee80211_rx_handlers_result(rx
, res
);
4184 ieee80211_rx_is_valid_sta_link_id(struct ieee80211_sta
*sta
, u8 link_id
)
4186 return !!(sta
->valid_links
& BIT(link_id
));
4189 static bool ieee80211_rx_data_set_link(struct ieee80211_rx_data
*rx
,
4192 rx
->link_id
= link_id
;
4193 rx
->link
= rcu_dereference(rx
->sdata
->link
[link_id
]);
4198 if (!ieee80211_rx_is_valid_sta_link_id(&rx
->sta
->sta
, link_id
))
4201 rx
->link_sta
= rcu_dereference(rx
->sta
->link
[link_id
]);
4203 return rx
->link
&& rx
->link_sta
;
4206 static bool ieee80211_rx_data_set_sta(struct ieee80211_rx_data
*rx
,
4207 struct sta_info
*sta
, int link_id
)
4209 rx
->link_id
= link_id
;
4213 rx
->local
= sta
->sdata
->local
;
4215 rx
->sdata
= sta
->sdata
;
4216 rx
->link_sta
= &sta
->deflink
;
4218 rx
->link_sta
= NULL
;
4222 rx
->link
= &rx
->sdata
->deflink
;
4223 else if (!ieee80211_rx_data_set_link(rx
, link_id
))
4230 * This function makes calls into the RX path, therefore
4231 * it has to be invoked under RCU read lock.
4233 void ieee80211_release_reorder_timeout(struct sta_info
*sta
, int tid
)
4235 struct sk_buff_head frames
;
4236 struct ieee80211_rx_data rx
= {
4237 /* This is OK -- must be QoS data frame */
4238 .security_idx
= tid
,
4241 struct tid_ampdu_rx
*tid_agg_rx
;
4244 /* FIXME: statistics won't be right with this */
4245 if (sta
->sta
.valid_links
)
4246 link_id
= ffs(sta
->sta
.valid_links
) - 1;
4248 if (!ieee80211_rx_data_set_sta(&rx
, sta
, link_id
))
4251 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
4255 __skb_queue_head_init(&frames
);
4257 spin_lock(&tid_agg_rx
->reorder_lock
);
4258 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
4259 spin_unlock(&tid_agg_rx
->reorder_lock
);
4261 if (!skb_queue_empty(&frames
)) {
4262 struct ieee80211_event event
= {
4263 .type
= BA_FRAME_TIMEOUT
,
4265 .u
.ba
.sta
= &sta
->sta
,
4267 drv_event_callback(rx
.local
, rx
.sdata
, &event
);
4270 ieee80211_rx_handlers(&rx
, &frames
);
4273 void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta
*pubsta
, u8 tid
,
4274 u16 ssn
, u64 filtered
,
4277 struct ieee80211_local
*local
;
4278 struct sta_info
*sta
;
4279 struct tid_ampdu_rx
*tid_agg_rx
;
4280 struct sk_buff_head frames
;
4281 struct ieee80211_rx_data rx
= {
4282 /* This is OK -- must be QoS data frame */
4283 .security_idx
= tid
,
4288 if (WARN_ON(!pubsta
|| tid
>= IEEE80211_NUM_TIDS
))
4291 __skb_queue_head_init(&frames
);
4293 sta
= container_of(pubsta
, struct sta_info
, sta
);
4295 local
= sta
->sdata
->local
;
4296 WARN_ONCE(local
->hw
.max_rx_aggregation_subframes
> 64,
4297 "RX BA marker can't support max_rx_aggregation_subframes %u > 64\n",
4298 local
->hw
.max_rx_aggregation_subframes
);
4300 if (!ieee80211_rx_data_set_sta(&rx
, sta
, -1))
4304 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
4308 spin_lock_bh(&tid_agg_rx
->reorder_lock
);
4310 if (received_mpdus
>= IEEE80211_SN_MODULO
>> 1) {
4313 /* release all frames in the reorder buffer */
4314 release
= (tid_agg_rx
->head_seq_num
+ tid_agg_rx
->buf_size
) %
4315 IEEE80211_SN_MODULO
;
4316 ieee80211_release_reorder_frames(sta
->sdata
, tid_agg_rx
,
4318 /* update ssn to match received ssn */
4319 tid_agg_rx
->head_seq_num
= ssn
;
4321 ieee80211_release_reorder_frames(sta
->sdata
, tid_agg_rx
, ssn
,
4325 /* handle the case that received ssn is behind the mac ssn.
4326 * it can be tid_agg_rx->buf_size behind and still be valid */
4327 diff
= (tid_agg_rx
->head_seq_num
- ssn
) & IEEE80211_SN_MASK
;
4328 if (diff
>= tid_agg_rx
->buf_size
) {
4329 tid_agg_rx
->reorder_buf_filtered
= 0;
4332 filtered
= filtered
>> diff
;
4336 for (i
= 0; i
< tid_agg_rx
->buf_size
; i
++) {
4337 int index
= (ssn
+ i
) % tid_agg_rx
->buf_size
;
4339 tid_agg_rx
->reorder_buf_filtered
&= ~BIT_ULL(index
);
4340 if (filtered
& BIT_ULL(i
))
4341 tid_agg_rx
->reorder_buf_filtered
|= BIT_ULL(index
);
4344 /* now process also frames that the filter marking released */
4345 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
4348 spin_unlock_bh(&tid_agg_rx
->reorder_lock
);
4350 ieee80211_rx_handlers(&rx
, &frames
);
4355 EXPORT_SYMBOL(ieee80211_mark_rx_ba_filtered_frames
);
4357 /* main receive path */
4359 static inline int ieee80211_bssid_match(const u8
*raddr
, const u8
*addr
)
4361 return ether_addr_equal(raddr
, addr
) ||
4362 is_broadcast_ether_addr(raddr
);
4365 static bool ieee80211_accept_frame(struct ieee80211_rx_data
*rx
)
4367 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
4368 struct sk_buff
*skb
= rx
->skb
;
4369 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
4370 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
4371 u8
*bssid
= ieee80211_get_bssid(hdr
, skb
->len
, sdata
->vif
.type
);
4372 bool multicast
= is_multicast_ether_addr(hdr
->addr1
) ||
4373 ieee80211_is_s1g_beacon(hdr
->frame_control
);
4375 switch (sdata
->vif
.type
) {
4376 case NL80211_IFTYPE_STATION
:
4377 if (!bssid
&& !sdata
->u
.mgd
.use_4addr
)
4379 if (ieee80211_is_first_frag(hdr
->seq_ctrl
) &&
4380 ieee80211_is_robust_mgmt_frame(skb
) && !rx
->sta
)
4384 return ieee80211_is_our_addr(sdata
, hdr
->addr1
, &rx
->link_id
);
4385 case NL80211_IFTYPE_ADHOC
:
4388 if (ether_addr_equal(sdata
->vif
.addr
, hdr
->addr2
) ||
4389 ether_addr_equal(sdata
->u
.ibss
.bssid
, hdr
->addr2
) ||
4390 !is_valid_ether_addr(hdr
->addr2
))
4392 if (ieee80211_is_beacon(hdr
->frame_control
))
4394 if (!ieee80211_bssid_match(bssid
, sdata
->u
.ibss
.bssid
))
4397 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
4401 if (status
->encoding
!= RX_ENC_LEGACY
)
4402 rate_idx
= 0; /* TODO: HT/VHT rates */
4404 rate_idx
= status
->rate_idx
;
4405 ieee80211_ibss_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
4409 case NL80211_IFTYPE_OCB
:
4412 if (!ieee80211_is_data_present(hdr
->frame_control
))
4414 if (!is_broadcast_ether_addr(bssid
))
4417 !ether_addr_equal(sdata
->dev
->dev_addr
, hdr
->addr1
))
4421 if (status
->encoding
!= RX_ENC_LEGACY
)
4422 rate_idx
= 0; /* TODO: HT rates */
4424 rate_idx
= status
->rate_idx
;
4425 ieee80211_ocb_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
4429 case NL80211_IFTYPE_MESH_POINT
:
4430 if (ether_addr_equal(sdata
->vif
.addr
, hdr
->addr2
))
4434 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
4435 case NL80211_IFTYPE_AP_VLAN
:
4436 case NL80211_IFTYPE_AP
:
4438 return ieee80211_is_our_addr(sdata
, hdr
->addr1
,
4441 if (!is_broadcast_ether_addr(bssid
) &&
4442 !ieee80211_is_our_addr(sdata
, bssid
, NULL
)) {
4444 * Accept public action frames even when the
4445 * BSSID doesn't match, this is used for P2P
4446 * and location updates. Note that mac80211
4447 * itself never looks at these frames.
4450 !ieee80211_is_our_addr(sdata
, hdr
->addr1
,
4453 if (ieee80211_is_public_action(hdr
, skb
->len
))
4455 return ieee80211_is_beacon(hdr
->frame_control
);
4458 if (!ieee80211_has_tods(hdr
->frame_control
)) {
4459 /* ignore data frames to TDLS-peers */
4460 if (ieee80211_is_data(hdr
->frame_control
))
4462 /* ignore action frames to TDLS-peers */
4463 if (ieee80211_is_action(hdr
->frame_control
) &&
4464 !is_broadcast_ether_addr(bssid
) &&
4465 !ether_addr_equal(bssid
, hdr
->addr1
))
4470 * 802.11-2016 Table 9-26 says that for data frames, A1 must be
4471 * the BSSID - we've checked that already but may have accepted
4472 * the wildcard (ff:ff:ff:ff:ff:ff).
4475 * The BSSID of the Data frame is determined as follows:
4476 * a) If the STA is contained within an AP or is associated
4477 * with an AP, the BSSID is the address currently in use
4478 * by the STA contained in the AP.
4480 * So we should not accept data frames with an address that's
4483 * Accepting it also opens a security problem because stations
4484 * could encrypt it with the GTK and inject traffic that way.
4486 if (ieee80211_is_data(hdr
->frame_control
) && multicast
)
4490 case NL80211_IFTYPE_P2P_DEVICE
:
4491 return ieee80211_is_public_action(hdr
, skb
->len
) ||
4492 ieee80211_is_probe_req(hdr
->frame_control
) ||
4493 ieee80211_is_probe_resp(hdr
->frame_control
) ||
4494 ieee80211_is_beacon(hdr
->frame_control
);
4495 case NL80211_IFTYPE_NAN
:
4496 /* Currently no frames on NAN interface are allowed */
4506 void ieee80211_check_fast_rx(struct sta_info
*sta
)
4508 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
4509 struct ieee80211_local
*local
= sdata
->local
;
4510 struct ieee80211_key
*key
;
4511 struct ieee80211_fast_rx fastrx
= {
4513 .vif_type
= sdata
->vif
.type
,
4514 .control_port_protocol
= sdata
->control_port_protocol
,
4515 }, *old
, *new = NULL
;
4517 bool set_offload
= false;
4518 bool assign
= false;
4521 /* use sparse to check that we don't return without updating */
4522 __acquire(check_fast_rx
);
4524 BUILD_BUG_ON(sizeof(fastrx
.rfc1042_hdr
) != sizeof(rfc1042_header
));
4525 BUILD_BUG_ON(sizeof(fastrx
.rfc1042_hdr
) != ETH_ALEN
);
4526 ether_addr_copy(fastrx
.rfc1042_hdr
, rfc1042_header
);
4527 ether_addr_copy(fastrx
.vif_addr
, sdata
->vif
.addr
);
4529 fastrx
.uses_rss
= ieee80211_hw_check(&local
->hw
, USES_RSS
);
4531 /* fast-rx doesn't do reordering */
4532 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
) &&
4533 !ieee80211_hw_check(&local
->hw
, SUPPORTS_REORDERING_BUFFER
))
4536 switch (sdata
->vif
.type
) {
4537 case NL80211_IFTYPE_STATION
:
4538 if (sta
->sta
.tdls
) {
4539 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
4540 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
4541 fastrx
.expected_ds_bits
= 0;
4543 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
4544 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4545 fastrx
.expected_ds_bits
=
4546 cpu_to_le16(IEEE80211_FCTL_FROMDS
);
4549 if (sdata
->u
.mgd
.use_4addr
&& !sta
->sta
.tdls
) {
4550 fastrx
.expected_ds_bits
|=
4551 cpu_to_le16(IEEE80211_FCTL_TODS
);
4552 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4553 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
4556 if (!sdata
->u
.mgd
.powersave
)
4559 /* software powersave is a huge mess, avoid all of it */
4560 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
))
4562 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
) &&
4563 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
))
4566 case NL80211_IFTYPE_AP_VLAN
:
4567 case NL80211_IFTYPE_AP
:
4568 /* parallel-rx requires this, at least with calls to
4569 * ieee80211_sta_ps_transition()
4571 if (!ieee80211_hw_check(&local
->hw
, AP_LINK_PS
))
4573 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4574 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
4575 fastrx
.expected_ds_bits
= cpu_to_le16(IEEE80211_FCTL_TODS
);
4577 fastrx
.internal_forward
=
4578 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
4579 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
||
4580 !sdata
->u
.vlan
.sta
);
4582 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
4583 sdata
->u
.vlan
.sta
) {
4584 fastrx
.expected_ds_bits
|=
4585 cpu_to_le16(IEEE80211_FCTL_FROMDS
);
4586 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
4587 fastrx
.internal_forward
= 0;
4591 case NL80211_IFTYPE_MESH_POINT
:
4592 fastrx
.expected_ds_bits
= cpu_to_le16(IEEE80211_FCTL_FROMDS
|
4593 IEEE80211_FCTL_TODS
);
4594 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4595 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
4601 if (!test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
4605 key
= rcu_dereference(sta
->ptk
[sta
->ptk_idx
]);
4607 key
= rcu_dereference(sdata
->default_unicast_key
);
4609 switch (key
->conf
.cipher
) {
4610 case WLAN_CIPHER_SUITE_TKIP
:
4611 /* we don't want to deal with MMIC in fast-rx */
4613 case WLAN_CIPHER_SUITE_CCMP
:
4614 case WLAN_CIPHER_SUITE_CCMP_256
:
4615 case WLAN_CIPHER_SUITE_GCMP
:
4616 case WLAN_CIPHER_SUITE_GCMP_256
:
4619 /* We also don't want to deal with
4620 * WEP or cipher scheme.
4626 fastrx
.icv_len
= key
->conf
.icv_len
;
4633 __release(check_fast_rx
);
4636 new = kmemdup(&fastrx
, sizeof(fastrx
), GFP_KERNEL
);
4638 offload_flags
= get_bss_sdata(sdata
)->vif
.offload_flags
;
4639 offload
= offload_flags
& IEEE80211_OFFLOAD_DECAP_ENABLED
;
4641 if (assign
&& offload
)
4642 set_offload
= !test_and_set_sta_flag(sta
, WLAN_STA_DECAP_OFFLOAD
);
4644 set_offload
= test_and_clear_sta_flag(sta
, WLAN_STA_DECAP_OFFLOAD
);
4647 drv_sta_set_decap_offload(local
, sdata
, &sta
->sta
, assign
);
4649 spin_lock_bh(&sta
->lock
);
4650 old
= rcu_dereference_protected(sta
->fast_rx
, true);
4651 rcu_assign_pointer(sta
->fast_rx
, new);
4652 spin_unlock_bh(&sta
->lock
);
4655 kfree_rcu(old
, rcu_head
);
4658 void ieee80211_clear_fast_rx(struct sta_info
*sta
)
4660 struct ieee80211_fast_rx
*old
;
4662 spin_lock_bh(&sta
->lock
);
4663 old
= rcu_dereference_protected(sta
->fast_rx
, true);
4664 RCU_INIT_POINTER(sta
->fast_rx
, NULL
);
4665 spin_unlock_bh(&sta
->lock
);
4668 kfree_rcu(old
, rcu_head
);
4671 void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data
*sdata
)
4673 struct ieee80211_local
*local
= sdata
->local
;
4674 struct sta_info
*sta
;
4676 lockdep_assert_wiphy(local
->hw
.wiphy
);
4678 list_for_each_entry(sta
, &local
->sta_list
, list
) {
4679 if (sdata
!= sta
->sdata
&&
4680 (!sta
->sdata
->bss
|| sta
->sdata
->bss
!= sdata
->bss
))
4682 ieee80211_check_fast_rx(sta
);
4686 void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data
*sdata
)
4688 struct ieee80211_local
*local
= sdata
->local
;
4690 lockdep_assert_wiphy(local
->hw
.wiphy
);
4692 __ieee80211_check_fast_rx_iface(sdata
);
4695 static void ieee80211_rx_8023(struct ieee80211_rx_data
*rx
,
4696 struct ieee80211_fast_rx
*fast_rx
,
4699 struct ieee80211_sta_rx_stats
*stats
;
4700 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
4701 struct sta_info
*sta
= rx
->sta
;
4702 struct link_sta_info
*link_sta
;
4703 struct sk_buff
*skb
= rx
->skb
;
4704 void *sa
= skb
->data
+ ETH_ALEN
;
4705 void *da
= skb
->data
;
4707 if (rx
->link_id
>= 0) {
4708 link_sta
= rcu_dereference(sta
->link
[rx
->link_id
]);
4709 if (WARN_ON_ONCE(!link_sta
)) {
4710 dev_kfree_skb(rx
->skb
);
4714 link_sta
= &sta
->deflink
;
4717 stats
= &link_sta
->rx_stats
;
4718 if (fast_rx
->uses_rss
)
4719 stats
= this_cpu_ptr(link_sta
->pcpu_rx_stats
);
4721 /* statistics part of ieee80211_rx_h_sta_process() */
4722 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
4723 stats
->last_signal
= status
->signal
;
4724 if (!fast_rx
->uses_rss
)
4725 ewma_signal_add(&link_sta
->rx_stats_avg
.signal
,
4729 if (status
->chains
) {
4732 stats
->chains
= status
->chains
;
4733 for (i
= 0; i
< ARRAY_SIZE(status
->chain_signal
); i
++) {
4734 int signal
= status
->chain_signal
[i
];
4736 if (!(status
->chains
& BIT(i
)))
4739 stats
->chain_signal_last
[i
] = signal
;
4740 if (!fast_rx
->uses_rss
)
4741 ewma_signal_add(&link_sta
->rx_stats_avg
.chain_signal
[i
],
4745 /* end of statistics */
4747 stats
->last_rx
= jiffies
;
4748 stats
->last_rate
= sta_stats_encode_rate(status
);
4753 skb
->dev
= fast_rx
->dev
;
4755 dev_sw_netstats_rx_add(fast_rx
->dev
, skb
->len
);
4757 /* The seqno index has the same property as needed
4758 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
4759 * for non-QoS-data frames. Here we know it's a data
4760 * frame, so count MSDUs.
4762 u64_stats_update_begin(&stats
->syncp
);
4763 stats
->msdu
[rx
->seqno_idx
]++;
4764 stats
->bytes
+= orig_len
;
4765 u64_stats_update_end(&stats
->syncp
);
4767 if (fast_rx
->internal_forward
) {
4768 struct sk_buff
*xmit_skb
= NULL
;
4769 if (is_multicast_ether_addr(da
)) {
4770 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
4771 } else if (!ether_addr_equal(da
, sa
) &&
4772 sta_info_get(rx
->sdata
, da
)) {
4779 * Send to wireless media and increase priority by 256
4780 * to keep the received priority instead of
4781 * reclassifying the frame (see cfg80211_classify8021d).
4783 xmit_skb
->priority
+= 256;
4784 xmit_skb
->protocol
= htons(ETH_P_802_3
);
4785 skb_reset_network_header(xmit_skb
);
4786 skb_reset_mac_header(xmit_skb
);
4787 dev_queue_xmit(xmit_skb
);
4794 /* deliver to local stack */
4795 skb
->protocol
= eth_type_trans(skb
, fast_rx
->dev
);
4796 ieee80211_deliver_skb_to_local_stack(skb
, rx
);
4799 static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data
*rx
,
4800 struct ieee80211_fast_rx
*fast_rx
)
4802 struct sk_buff
*skb
= rx
->skb
;
4803 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
4804 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
4805 static ieee80211_rx_result res
;
4806 int orig_len
= skb
->len
;
4807 int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
4808 int snap_offs
= hdrlen
;
4810 u8 snap
[sizeof(rfc1042_header
)];
4812 } *payload
__aligned(2);
4816 } addrs
__aligned(2);
4817 struct ieee80211_sta_rx_stats
*stats
;
4819 /* for parallel-rx, we need to have DUP_VALIDATED, otherwise we write
4820 * to a common data structure; drivers can implement that per queue
4821 * but we don't have that information in mac80211
4823 if (!(status
->flag
& RX_FLAG_DUP_VALIDATED
))
4826 #define FAST_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED)
4828 /* If using encryption, we also need to have:
4829 * - PN_VALIDATED: similar, but the implementation is tricky
4830 * - DECRYPTED: necessary for PN_VALIDATED
4833 (status
->flag
& FAST_RX_CRYPT_FLAGS
) != FAST_RX_CRYPT_FLAGS
)
4836 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
4839 if (unlikely(ieee80211_is_frag(hdr
)))
4842 /* Since our interface address cannot be multicast, this
4843 * implicitly also rejects multicast frames without the
4846 * We shouldn't get any *data* frames not addressed to us
4847 * (AP mode will accept multicast *management* frames), but
4848 * punting here will make it go through the full checks in
4849 * ieee80211_accept_frame().
4851 if (!ether_addr_equal(fast_rx
->vif_addr
, hdr
->addr1
))
4854 if ((hdr
->frame_control
& cpu_to_le16(IEEE80211_FCTL_FROMDS
|
4855 IEEE80211_FCTL_TODS
)) !=
4856 fast_rx
->expected_ds_bits
)
4859 /* assign the key to drop unencrypted frames (later)
4860 * and strip the IV/MIC if necessary
4862 if (fast_rx
->key
&& !(status
->flag
& RX_FLAG_IV_STRIPPED
)) {
4863 /* GCMP header length is the same */
4864 snap_offs
+= IEEE80211_CCMP_HDR_LEN
;
4867 if (!ieee80211_vif_is_mesh(&rx
->sdata
->vif
) &&
4868 !(status
->rx_flags
& IEEE80211_RX_AMSDU
)) {
4869 if (!pskb_may_pull(skb
, snap_offs
+ sizeof(*payload
)))
4872 payload
= (void *)(skb
->data
+ snap_offs
);
4874 if (!ether_addr_equal(payload
->snap
, fast_rx
->rfc1042_hdr
))
4877 /* Don't handle these here since they require special code.
4878 * Accept AARP and IPX even though they should come with a
4879 * bridge-tunnel header - but if we get them this way then
4880 * there's little point in discarding them.
4882 if (unlikely(payload
->proto
== cpu_to_be16(ETH_P_TDLS
) ||
4883 payload
->proto
== fast_rx
->control_port_protocol
))
4887 /* after this point, don't punt to the slowpath! */
4889 if (rx
->key
&& !(status
->flag
& RX_FLAG_MIC_STRIPPED
) &&
4890 pskb_trim(skb
, skb
->len
- fast_rx
->icv_len
))
4893 if (rx
->key
&& !ieee80211_has_protected(hdr
->frame_control
))
4896 if (status
->rx_flags
& IEEE80211_RX_AMSDU
) {
4897 if (__ieee80211_rx_h_amsdu(rx
, snap_offs
- hdrlen
) !=
4904 /* do the header conversion - first grab the addresses */
4905 ether_addr_copy(addrs
.da
, skb
->data
+ fast_rx
->da_offs
);
4906 ether_addr_copy(addrs
.sa
, skb
->data
+ fast_rx
->sa_offs
);
4907 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
)) {
4908 skb_pull(skb
, snap_offs
- 2);
4909 put_unaligned_be16(skb
->len
- 2, skb
->data
);
4911 skb_postpull_rcsum(skb
, skb
->data
+ snap_offs
,
4912 sizeof(rfc1042_header
) + 2);
4914 /* remove the SNAP but leave the ethertype */
4915 skb_pull(skb
, snap_offs
+ sizeof(rfc1042_header
));
4917 /* push the addresses in front */
4918 memcpy(skb_push(skb
, sizeof(addrs
)), &addrs
, sizeof(addrs
));
4920 res
= ieee80211_rx_mesh_data(rx
->sdata
, rx
->sta
, rx
->skb
);
4930 ieee80211_rx_8023(rx
, fast_rx
, orig_len
);
4936 if (fast_rx
->uses_rss
)
4937 stats
= this_cpu_ptr(rx
->link_sta
->pcpu_rx_stats
);
4939 stats
= &rx
->link_sta
->rx_stats
;
4946 * This function returns whether or not the SKB
4947 * was destined for RX processing or not, which,
4948 * if consume is true, is equivalent to whether
4949 * or not the skb was consumed.
4951 static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data
*rx
,
4952 struct sk_buff
*skb
, bool consume
)
4954 struct ieee80211_local
*local
= rx
->local
;
4955 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
4956 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
4957 struct link_sta_info
*link_sta
= rx
->link_sta
;
4958 struct ieee80211_link_data
*link
= rx
->link
;
4962 /* See if we can do fast-rx; if we have to copy we already lost,
4963 * so punt in that case. We should never have to deliver a data
4964 * frame to multiple interfaces anyway.
4966 * We skip the ieee80211_accept_frame() call and do the necessary
4967 * checking inside ieee80211_invoke_fast_rx().
4969 if (consume
&& rx
->sta
) {
4970 struct ieee80211_fast_rx
*fast_rx
;
4972 fast_rx
= rcu_dereference(rx
->sta
->fast_rx
);
4973 if (fast_rx
&& ieee80211_invoke_fast_rx(rx
, fast_rx
))
4977 if (!ieee80211_accept_frame(rx
))
4981 struct skb_shared_hwtstamps
*shwt
;
4983 rx
->skb
= skb_copy(skb
, GFP_ATOMIC
);
4985 if (net_ratelimit())
4986 wiphy_debug(local
->hw
.wiphy
,
4987 "failed to copy skb for %s\n",
4992 /* skb_copy() does not copy the hw timestamps, so copy it
4995 shwt
= skb_hwtstamps(rx
->skb
);
4996 shwt
->hwtstamp
= skb_hwtstamps(skb
)->hwtstamp
;
4998 /* Update the hdr pointer to the new skb for translation below */
4999 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
5002 if (unlikely(rx
->sta
&& rx
->sta
->sta
.mlo
) &&
5003 is_unicast_ether_addr(hdr
->addr1
) &&
5004 !ieee80211_is_probe_resp(hdr
->frame_control
) &&
5005 !ieee80211_is_beacon(hdr
->frame_control
)) {
5006 /* translate to MLD addresses */
5007 if (ether_addr_equal(link
->conf
->addr
, hdr
->addr1
))
5008 ether_addr_copy(hdr
->addr1
, rx
->sdata
->vif
.addr
);
5009 if (ether_addr_equal(link_sta
->addr
, hdr
->addr2
))
5010 ether_addr_copy(hdr
->addr2
, rx
->sta
->addr
);
5011 /* translate A3 only if it's the BSSID */
5012 if (!ieee80211_has_tods(hdr
->frame_control
) &&
5013 !ieee80211_has_fromds(hdr
->frame_control
)) {
5014 if (ether_addr_equal(link_sta
->addr
, hdr
->addr3
))
5015 ether_addr_copy(hdr
->addr3
, rx
->sta
->addr
);
5016 else if (ether_addr_equal(link
->conf
->addr
, hdr
->addr3
))
5017 ether_addr_copy(hdr
->addr3
, rx
->sdata
->vif
.addr
);
5019 /* not needed for A4 since it can only carry the SA */
5022 ieee80211_invoke_rx_handlers(rx
);
5026 static void __ieee80211_rx_handle_8023(struct ieee80211_hw
*hw
,
5027 struct ieee80211_sta
*pubsta
,
5028 struct sk_buff
*skb
,
5029 struct list_head
*list
)
5031 struct ieee80211_local
*local
= hw_to_local(hw
);
5032 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
5033 struct ieee80211_fast_rx
*fast_rx
;
5034 struct ieee80211_rx_data rx
;
5035 struct sta_info
*sta
;
5038 memset(&rx
, 0, sizeof(rx
));
5044 I802_DEBUG_INC(local
->dot11ReceivedFragmentCount
);
5046 /* drop frame if too short for header */
5047 if (skb
->len
< sizeof(struct ethhdr
))
5053 if (status
->link_valid
)
5054 link_id
= status
->link_id
;
5057 * TODO: Should the frame be dropped if the right link_id is not
5058 * available? Or may be it is fine in the current form to proceed with
5059 * the frame processing because with frame being in 802.3 format,
5060 * link_id is used only for stats purpose and updating the stats on
5061 * the deflink is fine?
5063 sta
= container_of(pubsta
, struct sta_info
, sta
);
5064 if (!ieee80211_rx_data_set_sta(&rx
, sta
, link_id
))
5067 fast_rx
= rcu_dereference(rx
.sta
->fast_rx
);
5071 ieee80211_rx_8023(&rx
, fast_rx
, skb
->len
);
5078 static bool ieee80211_rx_for_interface(struct ieee80211_rx_data
*rx
,
5079 struct sk_buff
*skb
, bool consume
)
5081 struct link_sta_info
*link_sta
;
5082 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
5083 struct sta_info
*sta
;
5087 * Look up link station first, in case there's a
5088 * chance that they might have a link address that
5089 * is identical to the MLD address, that way we'll
5090 * have the link information if needed.
5092 link_sta
= link_sta_info_get_bss(rx
->sdata
, hdr
->addr2
);
5094 sta
= link_sta
->sta
;
5095 link_id
= link_sta
->link_id
;
5097 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
5099 sta
= sta_info_get_bss(rx
->sdata
, hdr
->addr2
);
5100 if (status
->link_valid
)
5101 link_id
= status
->link_id
;
5104 if (!ieee80211_rx_data_set_sta(rx
, sta
, link_id
))
5107 return ieee80211_prepare_and_rx_handle(rx
, skb
, consume
);
5111 * This is the actual Rx frames handler. as it belongs to Rx path it must
5112 * be called with rcu_read_lock protection.
5114 static void __ieee80211_rx_handle_packet(struct ieee80211_hw
*hw
,
5115 struct ieee80211_sta
*pubsta
,
5116 struct sk_buff
*skb
,
5117 struct list_head
*list
)
5119 struct ieee80211_local
*local
= hw_to_local(hw
);
5120 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
5121 struct ieee80211_sub_if_data
*sdata
;
5122 struct ieee80211_hdr
*hdr
;
5124 struct ieee80211_rx_data rx
;
5125 struct ieee80211_sub_if_data
*prev
;
5126 struct rhlist_head
*tmp
;
5129 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
5130 memset(&rx
, 0, sizeof(rx
));
5136 if (ieee80211_is_data(fc
) || ieee80211_is_mgmt(fc
))
5137 I802_DEBUG_INC(local
->dot11ReceivedFragmentCount
);
5139 if (ieee80211_is_mgmt(fc
)) {
5140 /* drop frame if too short for header */
5141 if (skb
->len
< ieee80211_hdrlen(fc
))
5144 err
= skb_linearize(skb
);
5146 err
= !pskb_may_pull(skb
, ieee80211_hdrlen(fc
));
5154 hdr
= (struct ieee80211_hdr
*)skb
->data
;
5155 ieee80211_parse_qos(&rx
);
5156 ieee80211_verify_alignment(&rx
);
5158 if (unlikely(ieee80211_is_probe_resp(hdr
->frame_control
) ||
5159 ieee80211_is_beacon(hdr
->frame_control
) ||
5160 ieee80211_is_s1g_beacon(hdr
->frame_control
)))
5161 ieee80211_scan_rx(local
, skb
);
5163 if (ieee80211_is_data(fc
)) {
5164 struct sta_info
*sta
, *prev_sta
;
5167 if (status
->link_valid
)
5168 link_id
= status
->link_id
;
5171 sta
= container_of(pubsta
, struct sta_info
, sta
);
5172 if (!ieee80211_rx_data_set_sta(&rx
, sta
, link_id
))
5176 * In MLO connection, fetch the link_id using addr2
5177 * when the driver does not pass link_id in status.
5178 * When the address translation is already performed by
5179 * driver/hw, the valid link_id must be passed in
5183 if (!status
->link_valid
&& pubsta
->mlo
) {
5184 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
5185 struct link_sta_info
*link_sta
;
5187 link_sta
= link_sta_info_get_bss(rx
.sdata
,
5192 ieee80211_rx_data_set_link(&rx
, link_sta
->link_id
);
5195 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
5202 for_each_sta_info(local
, hdr
->addr2
, sta
, tmp
) {
5208 rx
.sdata
= prev_sta
->sdata
;
5209 if (!ieee80211_rx_data_set_sta(&rx
, prev_sta
, link_id
))
5212 if (!status
->link_valid
&& prev_sta
->sta
.mlo
)
5215 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
5221 rx
.sdata
= prev_sta
->sdata
;
5222 if (!ieee80211_rx_data_set_sta(&rx
, prev_sta
, link_id
))
5225 if (!status
->link_valid
&& prev_sta
->sta
.mlo
)
5228 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
5236 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
5237 if (!ieee80211_sdata_running(sdata
))
5240 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
5241 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
5245 * frame is destined for this interface, but if it's
5246 * not also for the previous one we handle that after
5247 * the loop to avoid copying the SKB once too much
5256 ieee80211_rx_for_interface(&rx
, skb
, false);
5264 if (ieee80211_rx_for_interface(&rx
, skb
, true))
5273 * This is the receive path handler. It is called by a low level driver when an
5274 * 802.11 MPDU is received from the hardware.
5276 void ieee80211_rx_list(struct ieee80211_hw
*hw
, struct ieee80211_sta
*pubsta
,
5277 struct sk_buff
*skb
, struct list_head
*list
)
5279 struct ieee80211_local
*local
= hw_to_local(hw
);
5280 struct ieee80211_rate
*rate
= NULL
;
5281 struct ieee80211_supported_band
*sband
;
5282 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
5283 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
5285 WARN_ON_ONCE(softirq_count() == 0);
5287 if (WARN_ON(status
->band
>= NUM_NL80211_BANDS
))
5290 sband
= local
->hw
.wiphy
->bands
[status
->band
];
5291 if (WARN_ON(!sband
))
5295 * If we're suspending, it is possible although not too likely
5296 * that we'd be receiving frames after having already partially
5297 * quiesced the stack. We can't process such frames then since
5298 * that might, for example, cause stations to be added or other
5299 * driver callbacks be invoked.
5301 if (unlikely(local
->quiescing
|| local
->suspended
))
5304 /* We might be during a HW reconfig, prevent Rx for the same reason */
5305 if (unlikely(local
->in_reconfig
))
5309 * The same happens when we're not even started,
5310 * but that's worth a warning.
5312 if (WARN_ON(!local
->started
))
5315 if (likely(!(status
->flag
& RX_FLAG_FAILED_PLCP_CRC
))) {
5317 * Validate the rate, unless a PLCP error means that
5318 * we probably can't have a valid rate here anyway.
5321 switch (status
->encoding
) {
5324 * rate_idx is MCS index, which can be [0-76]
5327 * https://wireless.wiki.kernel.org/en/developers/Documentation/ieee80211/802.11n
5329 * Anything else would be some sort of driver or
5330 * hardware error. The driver should catch hardware
5333 if (WARN(status
->rate_idx
> 76,
5334 "Rate marked as an HT rate but passed "
5335 "status->rate_idx is not "
5336 "an MCS index [0-76]: %d (0x%02x)\n",
5342 if (WARN_ONCE(status
->rate_idx
> 11 ||
5345 "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
5346 status
->rate_idx
, status
->nss
))
5350 if (WARN_ONCE(status
->rate_idx
> 11 ||
5353 "Rate marked as an HE rate but data is invalid: MCS: %d, NSS: %d\n",
5354 status
->rate_idx
, status
->nss
))
5358 if (WARN_ONCE(status
->rate_idx
> 15 ||
5361 status
->eht
.gi
> NL80211_RATE_INFO_EHT_GI_3_2
,
5362 "Rate marked as an EHT rate but data is invalid: MCS:%d, NSS:%d, GI:%d\n",
5363 status
->rate_idx
, status
->nss
, status
->eht
.gi
))
5370 if (WARN_ON(status
->rate_idx
>= sband
->n_bitrates
))
5372 rate
= &sband
->bitrates
[status
->rate_idx
];
5376 if (WARN_ON_ONCE(status
->link_id
>= IEEE80211_LINK_UNSPECIFIED
))
5379 status
->rx_flags
= 0;
5381 kcov_remote_start_common(skb_get_kcov_handle(skb
));
5384 * Frames with failed FCS/PLCP checksum are not returned,
5385 * all other frames are returned without radiotap header
5386 * if it was previously present.
5387 * Also, frames with less than 16 bytes are dropped.
5389 if (!(status
->flag
& RX_FLAG_8023
))
5390 skb
= ieee80211_rx_monitor(local
, skb
, rate
);
5392 if ((status
->flag
& RX_FLAG_8023
) ||
5393 ieee80211_is_data_present(hdr
->frame_control
))
5394 ieee80211_tpt_led_trig_rx(local
, skb
->len
);
5396 if (status
->flag
& RX_FLAG_8023
)
5397 __ieee80211_rx_handle_8023(hw
, pubsta
, skb
, list
);
5399 __ieee80211_rx_handle_packet(hw
, pubsta
, skb
, list
);
5407 EXPORT_SYMBOL(ieee80211_rx_list
);
5409 void ieee80211_rx_napi(struct ieee80211_hw
*hw
, struct ieee80211_sta
*pubsta
,
5410 struct sk_buff
*skb
, struct napi_struct
*napi
)
5412 struct sk_buff
*tmp
;
5417 * key references and virtual interfaces are protected using RCU
5418 * and this requires that we are in a read-side RCU section during
5419 * receive processing
5422 ieee80211_rx_list(hw
, pubsta
, skb
, &list
);
5426 netif_receive_skb_list(&list
);
5430 list_for_each_entry_safe(skb
, tmp
, &list
, list
) {
5431 skb_list_del_init(skb
);
5432 napi_gro_receive(napi
, skb
);
5435 EXPORT_SYMBOL(ieee80211_rx_napi
);
5437 /* This is a version of the rx handler that can be called from hard irq
5438 * context. Post the skb on the queue and schedule the tasklet */
5439 void ieee80211_rx_irqsafe(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
5441 struct ieee80211_local
*local
= hw_to_local(hw
);
5443 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status
) > sizeof(skb
->cb
));
5445 skb
->pkt_type
= IEEE80211_RX_MSG
;
5446 skb_queue_tail(&local
->skb_queue
, skb
);
5447 tasklet_schedule(&local
->tasklet
);
5449 EXPORT_SYMBOL(ieee80211_rx_irqsafe
);