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) 2018-2020 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_hdr
*hdr
;
51 __pskb_trim(skb
, skb
->len
- present_fcs_len
);
52 __pskb_pull(skb
, rtap_space
);
54 hdr
= (void *)skb
->data
;
55 fc
= hdr
->frame_control
;
58 * Remove the HT-Control field (if present) on management
59 * frames after we've sent the frame to monitoring. We
60 * (currently) don't need it, and don't properly parse
61 * frames with it present, due to the assumption of a
62 * fixed management header length.
64 if (likely(!ieee80211_is_mgmt(fc
) || !ieee80211_has_order(fc
)))
67 hdrlen
= ieee80211_hdrlen(fc
);
68 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_ORDER
);
70 if (!pskb_may_pull(skb
, hdrlen
)) {
75 memmove(skb
->data
+ IEEE80211_HT_CTL_LEN
, skb
->data
,
76 hdrlen
- IEEE80211_HT_CTL_LEN
);
77 __pskb_pull(skb
, IEEE80211_HT_CTL_LEN
);
82 static inline bool should_drop_frame(struct sk_buff
*skb
, int present_fcs_len
,
83 unsigned int rtap_space
)
85 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
86 struct ieee80211_hdr
*hdr
;
88 hdr
= (void *)(skb
->data
+ rtap_space
);
90 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
|
91 RX_FLAG_FAILED_PLCP_CRC
|
92 RX_FLAG_ONLY_MONITOR
|
96 if (unlikely(skb
->len
< 16 + present_fcs_len
+ rtap_space
))
99 if (ieee80211_is_ctl(hdr
->frame_control
) &&
100 !ieee80211_is_pspoll(hdr
->frame_control
) &&
101 !ieee80211_is_back_req(hdr
->frame_control
))
108 ieee80211_rx_radiotap_hdrlen(struct ieee80211_local
*local
,
109 struct ieee80211_rx_status
*status
,
114 /* always present fields */
115 len
= sizeof(struct ieee80211_radiotap_header
) + 8;
117 /* allocate extra bitmaps */
119 len
+= 4 * hweight8(status
->chains
);
120 /* vendor presence bitmap */
121 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
)
124 if (ieee80211_have_rx_timestamp(status
)) {
128 if (ieee80211_hw_check(&local
->hw
, SIGNAL_DBM
))
131 /* antenna field, if we don't have per-chain info */
135 /* padding for RX_FLAGS if necessary */
138 if (status
->encoding
== RX_ENC_HT
) /* HT info */
141 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
146 if (status
->encoding
== RX_ENC_VHT
) {
151 if (local
->hw
.radiotap_timestamp
.units_pos
>= 0) {
156 if (status
->encoding
== RX_ENC_HE
&&
157 status
->flag
& RX_FLAG_RADIOTAP_HE
) {
160 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he
) != 12);
163 if (status
->encoding
== RX_ENC_HE
&&
164 status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
167 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu
) != 12);
170 if (status
->flag
& RX_FLAG_NO_PSDU
)
173 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
176 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig
) != 4);
179 if (status
->chains
) {
180 /* antenna and antenna signal fields */
181 len
+= 2 * hweight8(status
->chains
);
184 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
185 struct ieee80211_vendor_radiotap
*rtap
;
186 int vendor_data_offset
= 0;
189 * The position to look at depends on the existence (or non-
190 * existence) of other elements, so take that into account...
192 if (status
->flag
& RX_FLAG_RADIOTAP_HE
)
193 vendor_data_offset
+=
194 sizeof(struct ieee80211_radiotap_he
);
195 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
)
196 vendor_data_offset
+=
197 sizeof(struct ieee80211_radiotap_he_mu
);
198 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
)
199 vendor_data_offset
+=
200 sizeof(struct ieee80211_radiotap_lsig
);
202 rtap
= (void *)&skb
->data
[vendor_data_offset
];
204 /* alignment for fixed 6-byte vendor data header */
206 /* vendor data header */
208 if (WARN_ON(rtap
->align
== 0))
210 len
= ALIGN(len
, rtap
->align
);
211 len
+= rtap
->len
+ rtap
->pad
;
217 static void ieee80211_handle_mu_mimo_mon(struct ieee80211_sub_if_data
*sdata
,
222 struct ieee80211_hdr_3addr hdr
;
225 } __packed
__aligned(2) action
;
230 BUILD_BUG_ON(sizeof(action
) != IEEE80211_MIN_ACTION_SIZE
+ 1);
232 if (skb
->len
< rtap_space
+ sizeof(action
) +
233 VHT_MUMIMO_GROUPS_DATA_LEN
)
236 if (!is_valid_ether_addr(sdata
->u
.mntr
.mu_follow_addr
))
239 skb_copy_bits(skb
, rtap_space
, &action
, sizeof(action
));
241 if (!ieee80211_is_action(action
.hdr
.frame_control
))
244 if (action
.category
!= WLAN_CATEGORY_VHT
)
247 if (action
.action_code
!= WLAN_VHT_ACTION_GROUPID_MGMT
)
250 if (!ether_addr_equal(action
.hdr
.addr1
, sdata
->u
.mntr
.mu_follow_addr
))
253 skb
= skb_copy(skb
, GFP_ATOMIC
);
257 skb_queue_tail(&sdata
->skb_queue
, skb
);
258 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
262 * ieee80211_add_rx_radiotap_header - add radiotap header
264 * add a radiotap header containing all the fields which the hardware provided.
267 ieee80211_add_rx_radiotap_header(struct ieee80211_local
*local
,
269 struct ieee80211_rate
*rate
,
270 int rtap_len
, bool has_fcs
)
272 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
273 struct ieee80211_radiotap_header
*rthdr
;
278 u16 channel_flags
= 0;
280 unsigned long chains
= status
->chains
;
281 struct ieee80211_vendor_radiotap rtap
= {};
282 struct ieee80211_radiotap_he he
= {};
283 struct ieee80211_radiotap_he_mu he_mu
= {};
284 struct ieee80211_radiotap_lsig lsig
= {};
286 if (status
->flag
& RX_FLAG_RADIOTAP_HE
) {
287 he
= *(struct ieee80211_radiotap_he
*)skb
->data
;
288 skb_pull(skb
, sizeof(he
));
289 WARN_ON_ONCE(status
->encoding
!= RX_ENC_HE
);
292 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
293 he_mu
= *(struct ieee80211_radiotap_he_mu
*)skb
->data
;
294 skb_pull(skb
, sizeof(he_mu
));
297 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
298 lsig
= *(struct ieee80211_radiotap_lsig
*)skb
->data
;
299 skb_pull(skb
, sizeof(lsig
));
302 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
303 rtap
= *(struct ieee80211_vendor_radiotap
*)skb
->data
;
304 /* rtap.len and rtap.pad are undone immediately */
305 skb_pull(skb
, sizeof(rtap
) + rtap
.len
+ rtap
.pad
);
309 if (!(has_fcs
&& ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
)))
312 rthdr
= skb_push(skb
, rtap_len
);
313 memset(rthdr
, 0, rtap_len
- rtap
.len
- rtap
.pad
);
314 it_present
= &rthdr
->it_present
;
316 /* radiotap header, set always present flags */
317 rthdr
->it_len
= cpu_to_le16(rtap_len
);
318 it_present_val
= BIT(IEEE80211_RADIOTAP_FLAGS
) |
319 BIT(IEEE80211_RADIOTAP_CHANNEL
) |
320 BIT(IEEE80211_RADIOTAP_RX_FLAGS
);
323 it_present_val
|= BIT(IEEE80211_RADIOTAP_ANTENNA
);
325 for_each_set_bit(chain
, &chains
, IEEE80211_MAX_CHAINS
) {
327 BIT(IEEE80211_RADIOTAP_EXT
) |
328 BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE
);
329 put_unaligned_le32(it_present_val
, it_present
);
331 it_present_val
= BIT(IEEE80211_RADIOTAP_ANTENNA
) |
332 BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL
);
335 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
336 it_present_val
|= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE
) |
337 BIT(IEEE80211_RADIOTAP_EXT
);
338 put_unaligned_le32(it_present_val
, it_present
);
340 it_present_val
= rtap
.present
;
343 put_unaligned_le32(it_present_val
, it_present
);
345 pos
= (void *)(it_present
+ 1);
347 /* the order of the following fields is important */
349 /* IEEE80211_RADIOTAP_TSFT */
350 if (ieee80211_have_rx_timestamp(status
)) {
352 while ((pos
- (u8
*)rthdr
) & 7)
355 ieee80211_calculate_rx_timestamp(local
, status
,
358 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT
);
362 /* IEEE80211_RADIOTAP_FLAGS */
363 if (has_fcs
&& ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
))
364 *pos
|= IEEE80211_RADIOTAP_F_FCS
;
365 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
| RX_FLAG_FAILED_PLCP_CRC
))
366 *pos
|= IEEE80211_RADIOTAP_F_BADFCS
;
367 if (status
->enc_flags
& RX_ENC_FLAG_SHORTPRE
)
368 *pos
|= IEEE80211_RADIOTAP_F_SHORTPRE
;
371 /* IEEE80211_RADIOTAP_RATE */
372 if (!rate
|| status
->encoding
!= RX_ENC_LEGACY
) {
374 * Without rate information don't add it. If we have,
375 * MCS information is a separate field in radiotap,
376 * added below. The byte here is needed as padding
377 * for the channel though, so initialise it to 0.
382 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE
);
383 if (status
->bw
== RATE_INFO_BW_10
)
385 else if (status
->bw
== RATE_INFO_BW_5
)
387 *pos
= DIV_ROUND_UP(rate
->bitrate
, 5 * (1 << shift
));
391 /* IEEE80211_RADIOTAP_CHANNEL */
392 /* TODO: frequency offset in KHz */
393 put_unaligned_le16(status
->freq
, pos
);
395 if (status
->bw
== RATE_INFO_BW_10
)
396 channel_flags
|= IEEE80211_CHAN_HALF
;
397 else if (status
->bw
== RATE_INFO_BW_5
)
398 channel_flags
|= IEEE80211_CHAN_QUARTER
;
400 if (status
->band
== NL80211_BAND_5GHZ
||
401 status
->band
== NL80211_BAND_6GHZ
)
402 channel_flags
|= IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_5GHZ
;
403 else if (status
->encoding
!= RX_ENC_LEGACY
)
404 channel_flags
|= IEEE80211_CHAN_DYN
| IEEE80211_CHAN_2GHZ
;
405 else if (rate
&& rate
->flags
& IEEE80211_RATE_ERP_G
)
406 channel_flags
|= IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_2GHZ
;
408 channel_flags
|= IEEE80211_CHAN_CCK
| IEEE80211_CHAN_2GHZ
;
410 channel_flags
|= IEEE80211_CHAN_2GHZ
;
411 put_unaligned_le16(channel_flags
, pos
);
414 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
415 if (ieee80211_hw_check(&local
->hw
, SIGNAL_DBM
) &&
416 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
417 *pos
= status
->signal
;
419 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL
);
423 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
425 if (!status
->chains
) {
426 /* IEEE80211_RADIOTAP_ANTENNA */
427 *pos
= status
->antenna
;
431 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
433 /* IEEE80211_RADIOTAP_RX_FLAGS */
434 /* ensure 2 byte alignment for the 2 byte field as required */
435 if ((pos
- (u8
*)rthdr
) & 1)
437 if (status
->flag
& RX_FLAG_FAILED_PLCP_CRC
)
438 rx_flags
|= IEEE80211_RADIOTAP_F_RX_BADPLCP
;
439 put_unaligned_le16(rx_flags
, pos
);
442 if (status
->encoding
== RX_ENC_HT
) {
445 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS
);
446 *pos
++ = local
->hw
.radiotap_mcs_details
;
448 if (status
->enc_flags
& RX_ENC_FLAG_SHORT_GI
)
449 *pos
|= IEEE80211_RADIOTAP_MCS_SGI
;
450 if (status
->bw
== RATE_INFO_BW_40
)
451 *pos
|= IEEE80211_RADIOTAP_MCS_BW_40
;
452 if (status
->enc_flags
& RX_ENC_FLAG_HT_GF
)
453 *pos
|= IEEE80211_RADIOTAP_MCS_FMT_GF
;
454 if (status
->enc_flags
& RX_ENC_FLAG_LDPC
)
455 *pos
|= IEEE80211_RADIOTAP_MCS_FEC_LDPC
;
456 stbc
= (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
) >> RX_ENC_FLAG_STBC_SHIFT
;
457 *pos
|= stbc
<< IEEE80211_RADIOTAP_MCS_STBC_SHIFT
;
459 *pos
++ = status
->rate_idx
;
462 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
465 /* ensure 4 byte alignment */
466 while ((pos
- (u8
*)rthdr
) & 3)
469 cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS
);
470 put_unaligned_le32(status
->ampdu_reference
, pos
);
472 if (status
->flag
& RX_FLAG_AMPDU_LAST_KNOWN
)
473 flags
|= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN
;
474 if (status
->flag
& RX_FLAG_AMPDU_IS_LAST
)
475 flags
|= IEEE80211_RADIOTAP_AMPDU_IS_LAST
;
476 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_ERROR
)
477 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR
;
478 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
479 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN
;
480 if (status
->flag
& RX_FLAG_AMPDU_EOF_BIT_KNOWN
)
481 flags
|= IEEE80211_RADIOTAP_AMPDU_EOF_KNOWN
;
482 if (status
->flag
& RX_FLAG_AMPDU_EOF_BIT
)
483 flags
|= IEEE80211_RADIOTAP_AMPDU_EOF
;
484 put_unaligned_le16(flags
, pos
);
486 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
487 *pos
++ = status
->ampdu_delimiter_crc
;
493 if (status
->encoding
== RX_ENC_VHT
) {
494 u16 known
= local
->hw
.radiotap_vht_details
;
496 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT
);
497 put_unaligned_le16(known
, pos
);
500 if (status
->enc_flags
& RX_ENC_FLAG_SHORT_GI
)
501 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_SGI
;
502 /* in VHT, STBC is binary */
503 if (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
)
504 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_STBC
;
505 if (status
->enc_flags
& RX_ENC_FLAG_BF
)
506 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED
;
509 switch (status
->bw
) {
510 case RATE_INFO_BW_80
:
513 case RATE_INFO_BW_160
:
516 case RATE_INFO_BW_40
:
523 *pos
= (status
->rate_idx
<< 4) | status
->nss
;
526 if (status
->enc_flags
& RX_ENC_FLAG_LDPC
)
527 *pos
|= IEEE80211_RADIOTAP_CODING_LDPC_USER0
;
535 if (local
->hw
.radiotap_timestamp
.units_pos
>= 0) {
537 u8 flags
= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT
;
540 cpu_to_le32(1 << IEEE80211_RADIOTAP_TIMESTAMP
);
542 /* ensure 8 byte alignment */
543 while ((pos
- (u8
*)rthdr
) & 7)
546 put_unaligned_le64(status
->device_timestamp
, pos
);
549 if (local
->hw
.radiotap_timestamp
.accuracy
>= 0) {
550 accuracy
= local
->hw
.radiotap_timestamp
.accuracy
;
551 flags
|= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY
;
553 put_unaligned_le16(accuracy
, pos
);
556 *pos
++ = local
->hw
.radiotap_timestamp
.units_pos
;
560 if (status
->encoding
== RX_ENC_HE
&&
561 status
->flag
& RX_FLAG_RADIOTAP_HE
) {
562 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
564 if (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
) {
565 he
.data6
|= HE_PREP(DATA6_NSTS
,
566 FIELD_GET(RX_ENC_FLAG_STBC_MASK
,
568 he
.data3
|= HE_PREP(DATA3_STBC
, 1);
570 he
.data6
|= HE_PREP(DATA6_NSTS
, status
->nss
);
573 #define CHECK_GI(s) \
574 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
575 (int)NL80211_RATE_INFO_HE_GI_##s)
581 he
.data3
|= HE_PREP(DATA3_DATA_MCS
, status
->rate_idx
);
582 he
.data3
|= HE_PREP(DATA3_DATA_DCM
, status
->he_dcm
);
583 he
.data3
|= HE_PREP(DATA3_CODING
,
584 !!(status
->enc_flags
& RX_ENC_FLAG_LDPC
));
586 he
.data5
|= HE_PREP(DATA5_GI
, status
->he_gi
);
588 switch (status
->bw
) {
589 case RATE_INFO_BW_20
:
590 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
591 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ
);
593 case RATE_INFO_BW_40
:
594 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
595 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ
);
597 case RATE_INFO_BW_80
:
598 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
599 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ
);
601 case RATE_INFO_BW_160
:
602 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
603 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ
);
605 case RATE_INFO_BW_HE_RU
:
606 #define CHECK_RU_ALLOC(s) \
607 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
608 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
616 CHECK_RU_ALLOC(2x996
);
618 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
622 WARN_ONCE(1, "Invalid SU BW %d\n", status
->bw
);
625 /* ensure 2 byte alignment */
626 while ((pos
- (u8
*)rthdr
) & 1)
628 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE
);
629 memcpy(pos
, &he
, sizeof(he
));
633 if (status
->encoding
== RX_ENC_HE
&&
634 status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
635 /* ensure 2 byte alignment */
636 while ((pos
- (u8
*)rthdr
) & 1)
638 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE_MU
);
639 memcpy(pos
, &he_mu
, sizeof(he_mu
));
640 pos
+= sizeof(he_mu
);
643 if (status
->flag
& RX_FLAG_NO_PSDU
) {
645 cpu_to_le32(1 << IEEE80211_RADIOTAP_ZERO_LEN_PSDU
);
646 *pos
++ = status
->zero_length_psdu_type
;
649 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
650 /* ensure 2 byte alignment */
651 while ((pos
- (u8
*)rthdr
) & 1)
653 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_LSIG
);
654 memcpy(pos
, &lsig
, sizeof(lsig
));
658 for_each_set_bit(chain
, &chains
, IEEE80211_MAX_CHAINS
) {
659 *pos
++ = status
->chain_signal
[chain
];
663 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
664 /* ensure 2 byte alignment for the vendor field as required */
665 if ((pos
- (u8
*)rthdr
) & 1)
667 *pos
++ = rtap
.oui
[0];
668 *pos
++ = rtap
.oui
[1];
669 *pos
++ = rtap
.oui
[2];
671 put_unaligned_le16(rtap
.len
, pos
);
673 /* align the actual payload as requested */
674 while ((pos
- (u8
*)rthdr
) & (rtap
.align
- 1))
676 /* data (and possible padding) already follows */
680 static struct sk_buff
*
681 ieee80211_make_monitor_skb(struct ieee80211_local
*local
,
682 struct sk_buff
**origskb
,
683 struct ieee80211_rate
*rate
,
684 int rtap_space
, bool use_origskb
)
686 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(*origskb
);
687 int rt_hdrlen
, needed_headroom
;
690 /* room for the radiotap header based on driver features */
691 rt_hdrlen
= ieee80211_rx_radiotap_hdrlen(local
, status
, *origskb
);
692 needed_headroom
= rt_hdrlen
- rtap_space
;
695 /* only need to expand headroom if necessary */
700 * This shouldn't trigger often because most devices have an
701 * RX header they pull before we get here, and that should
702 * be big enough for our radiotap information. We should
703 * probably export the length to drivers so that we can have
704 * them allocate enough headroom to start with.
706 if (skb_headroom(skb
) < needed_headroom
&&
707 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
)) {
713 * Need to make a copy and possibly remove radiotap header
714 * and FCS from the original.
716 skb
= skb_copy_expand(*origskb
, needed_headroom
, 0, GFP_ATOMIC
);
722 /* prepend radiotap information */
723 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, rt_hdrlen
, true);
725 skb_reset_mac_header(skb
);
726 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
727 skb
->pkt_type
= PACKET_OTHERHOST
;
728 skb
->protocol
= htons(ETH_P_802_2
);
734 * This function copies a received frame to all monitor interfaces and
735 * returns a cleaned-up SKB that no longer includes the FCS nor the
736 * radiotap header the driver might have added.
738 static struct sk_buff
*
739 ieee80211_rx_monitor(struct ieee80211_local
*local
, struct sk_buff
*origskb
,
740 struct ieee80211_rate
*rate
)
742 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(origskb
);
743 struct ieee80211_sub_if_data
*sdata
;
744 struct sk_buff
*monskb
= NULL
;
745 int present_fcs_len
= 0;
746 unsigned int rtap_space
= 0;
747 struct ieee80211_sub_if_data
*monitor_sdata
=
748 rcu_dereference(local
->monitor_sdata
);
749 bool only_monitor
= false;
750 unsigned int min_head_len
;
752 if (status
->flag
& RX_FLAG_RADIOTAP_HE
)
753 rtap_space
+= sizeof(struct ieee80211_radiotap_he
);
755 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
)
756 rtap_space
+= sizeof(struct ieee80211_radiotap_he_mu
);
758 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
)
759 rtap_space
+= sizeof(struct ieee80211_radiotap_lsig
);
761 if (unlikely(status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
)) {
762 struct ieee80211_vendor_radiotap
*rtap
=
763 (void *)(origskb
->data
+ rtap_space
);
765 rtap_space
+= sizeof(*rtap
) + rtap
->len
+ rtap
->pad
;
768 min_head_len
= rtap_space
;
771 * First, we may need to make a copy of the skb because
772 * (1) we need to modify it for radiotap (if not present), and
773 * (2) the other RX handlers will modify the skb we got.
775 * We don't need to, of course, if we aren't going to return
776 * the SKB because it has a bad FCS/PLCP checksum.
779 if (!(status
->flag
& RX_FLAG_NO_PSDU
)) {
780 if (ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
)) {
781 if (unlikely(origskb
->len
<= FCS_LEN
+ rtap_space
)) {
784 dev_kfree_skb(origskb
);
787 present_fcs_len
= FCS_LEN
;
790 /* also consider the hdr->frame_control */
794 /* ensure that the expected data elements are in skb head */
795 if (!pskb_may_pull(origskb
, min_head_len
)) {
796 dev_kfree_skb(origskb
);
800 only_monitor
= should_drop_frame(origskb
, present_fcs_len
, rtap_space
);
802 if (!local
->monitors
|| (status
->flag
& RX_FLAG_SKIP_MONITOR
)) {
804 dev_kfree_skb(origskb
);
808 return ieee80211_clean_skb(origskb
, present_fcs_len
,
812 ieee80211_handle_mu_mimo_mon(monitor_sdata
, origskb
, rtap_space
);
814 list_for_each_entry_rcu(sdata
, &local
->mon_list
, u
.mntr
.list
) {
815 bool last_monitor
= list_is_last(&sdata
->u
.mntr
.list
,
819 monskb
= ieee80211_make_monitor_skb(local
, &origskb
,
831 skb
= skb_clone(monskb
, GFP_ATOMIC
);
835 skb
->dev
= sdata
->dev
;
836 dev_sw_netstats_rx_add(skb
->dev
, skb
->len
);
837 netif_receive_skb(skb
);
845 /* this happens if last_monitor was erroneously false */
846 dev_kfree_skb(monskb
);
852 return ieee80211_clean_skb(origskb
, present_fcs_len
, rtap_space
);
855 static void ieee80211_parse_qos(struct ieee80211_rx_data
*rx
)
857 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
858 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
859 int tid
, seqno_idx
, security_idx
;
861 /* does the frame have a qos control field? */
862 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
863 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
864 /* frame has qos control */
865 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
866 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
867 status
->rx_flags
|= IEEE80211_RX_AMSDU
;
873 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
875 * Sequence numbers for management frames, QoS data
876 * frames with a broadcast/multicast address in the
877 * Address 1 field, and all non-QoS data frames sent
878 * by QoS STAs are assigned using an additional single
879 * modulo-4096 counter, [...]
881 * We also use that counter for non-QoS STAs.
883 seqno_idx
= IEEE80211_NUM_TIDS
;
885 if (ieee80211_is_mgmt(hdr
->frame_control
))
886 security_idx
= IEEE80211_NUM_TIDS
;
890 rx
->seqno_idx
= seqno_idx
;
891 rx
->security_idx
= security_idx
;
892 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
893 * For now, set skb->priority to 0 for other cases. */
894 rx
->skb
->priority
= (tid
> 7) ? 0 : tid
;
898 * DOC: Packet alignment
900 * Drivers always need to pass packets that are aligned to two-byte boundaries
903 * Additionally, should, if possible, align the payload data in a way that
904 * guarantees that the contained IP header is aligned to a four-byte
905 * boundary. In the case of regular frames, this simply means aligning the
906 * payload to a four-byte boundary (because either the IP header is directly
907 * contained, or IV/RFC1042 headers that have a length divisible by four are
908 * in front of it). If the payload data is not properly aligned and the
909 * architecture doesn't support efficient unaligned operations, mac80211
910 * will align the data.
912 * With A-MSDU frames, however, the payload data address must yield two modulo
913 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
914 * push the IP header further back to a multiple of four again. Thankfully, the
915 * specs were sane enough this time around to require padding each A-MSDU
916 * subframe to a length that is a multiple of four.
918 * Padding like Atheros hardware adds which is between the 802.11 header and
919 * the payload is not supported, the driver is required to move the 802.11
920 * header to be directly in front of the payload in that case.
922 static void ieee80211_verify_alignment(struct ieee80211_rx_data
*rx
)
924 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
925 WARN_ON_ONCE((unsigned long)rx
->skb
->data
& 1);
932 static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff
*skb
)
934 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
936 if (is_multicast_ether_addr(hdr
->addr1
))
939 return ieee80211_is_robust_mgmt_frame(skb
);
943 static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff
*skb
)
945 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
947 if (!is_multicast_ether_addr(hdr
->addr1
))
950 return ieee80211_is_robust_mgmt_frame(skb
);
954 /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
955 static int ieee80211_get_mmie_keyidx(struct sk_buff
*skb
)
957 struct ieee80211_mgmt
*hdr
= (struct ieee80211_mgmt
*) skb
->data
;
958 struct ieee80211_mmie
*mmie
;
959 struct ieee80211_mmie_16
*mmie16
;
961 if (skb
->len
< 24 + sizeof(*mmie
) || !is_multicast_ether_addr(hdr
->da
))
964 if (!ieee80211_is_robust_mgmt_frame(skb
) &&
965 !ieee80211_is_beacon(hdr
->frame_control
))
966 return -1; /* not a robust management frame */
968 mmie
= (struct ieee80211_mmie
*)
969 (skb
->data
+ skb
->len
- sizeof(*mmie
));
970 if (mmie
->element_id
== WLAN_EID_MMIE
&&
971 mmie
->length
== sizeof(*mmie
) - 2)
972 return le16_to_cpu(mmie
->key_id
);
974 mmie16
= (struct ieee80211_mmie_16
*)
975 (skb
->data
+ skb
->len
- sizeof(*mmie16
));
976 if (skb
->len
>= 24 + sizeof(*mmie16
) &&
977 mmie16
->element_id
== WLAN_EID_MMIE
&&
978 mmie16
->length
== sizeof(*mmie16
) - 2)
979 return le16_to_cpu(mmie16
->key_id
);
984 static int ieee80211_get_keyid(struct sk_buff
*skb
,
985 const struct ieee80211_cipher_scheme
*cs
)
987 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
995 fc
= hdr
->frame_control
;
996 hdrlen
= ieee80211_hdrlen(fc
);
999 minlen
= hdrlen
+ cs
->hdr_len
;
1000 key_idx_off
= hdrlen
+ cs
->key_idx_off
;
1001 key_idx_shift
= cs
->key_idx_shift
;
1003 /* WEP, TKIP, CCMP and GCMP */
1004 minlen
= hdrlen
+ IEEE80211_WEP_IV_LEN
;
1005 key_idx_off
= hdrlen
+ 3;
1009 if (unlikely(skb
->len
< minlen
))
1012 skb_copy_bits(skb
, key_idx_off
, &keyid
, 1);
1015 keyid
&= cs
->key_idx_mask
;
1016 keyid
>>= key_idx_shift
;
1018 /* cs could use more than the usual two bits for the keyid */
1019 if (unlikely(keyid
>= NUM_DEFAULT_KEYS
))
1025 static ieee80211_rx_result
ieee80211_rx_mesh_check(struct ieee80211_rx_data
*rx
)
1027 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1028 char *dev_addr
= rx
->sdata
->vif
.addr
;
1030 if (ieee80211_is_data(hdr
->frame_control
)) {
1031 if (is_multicast_ether_addr(hdr
->addr1
)) {
1032 if (ieee80211_has_tods(hdr
->frame_control
) ||
1033 !ieee80211_has_fromds(hdr
->frame_control
))
1034 return RX_DROP_MONITOR
;
1035 if (ether_addr_equal(hdr
->addr3
, dev_addr
))
1036 return RX_DROP_MONITOR
;
1038 if (!ieee80211_has_a4(hdr
->frame_control
))
1039 return RX_DROP_MONITOR
;
1040 if (ether_addr_equal(hdr
->addr4
, dev_addr
))
1041 return RX_DROP_MONITOR
;
1045 /* If there is not an established peer link and this is not a peer link
1046 * establisment frame, beacon or probe, drop the frame.
1049 if (!rx
->sta
|| sta_plink_state(rx
->sta
) != NL80211_PLINK_ESTAB
) {
1050 struct ieee80211_mgmt
*mgmt
;
1052 if (!ieee80211_is_mgmt(hdr
->frame_control
))
1053 return RX_DROP_MONITOR
;
1055 if (ieee80211_is_action(hdr
->frame_control
)) {
1058 /* make sure category field is present */
1059 if (rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
)
1060 return RX_DROP_MONITOR
;
1062 mgmt
= (struct ieee80211_mgmt
*)hdr
;
1063 category
= mgmt
->u
.action
.category
;
1064 if (category
!= WLAN_CATEGORY_MESH_ACTION
&&
1065 category
!= WLAN_CATEGORY_SELF_PROTECTED
)
1066 return RX_DROP_MONITOR
;
1070 if (ieee80211_is_probe_req(hdr
->frame_control
) ||
1071 ieee80211_is_probe_resp(hdr
->frame_control
) ||
1072 ieee80211_is_beacon(hdr
->frame_control
) ||
1073 ieee80211_is_auth(hdr
->frame_control
))
1076 return RX_DROP_MONITOR
;
1082 static inline bool ieee80211_rx_reorder_ready(struct tid_ampdu_rx
*tid_agg_rx
,
1085 struct sk_buff_head
*frames
= &tid_agg_rx
->reorder_buf
[index
];
1086 struct sk_buff
*tail
= skb_peek_tail(frames
);
1087 struct ieee80211_rx_status
*status
;
1089 if (tid_agg_rx
->reorder_buf_filtered
& BIT_ULL(index
))
1095 status
= IEEE80211_SKB_RXCB(tail
);
1096 if (status
->flag
& RX_FLAG_AMSDU_MORE
)
1102 static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data
*sdata
,
1103 struct tid_ampdu_rx
*tid_agg_rx
,
1105 struct sk_buff_head
*frames
)
1107 struct sk_buff_head
*skb_list
= &tid_agg_rx
->reorder_buf
[index
];
1108 struct sk_buff
*skb
;
1109 struct ieee80211_rx_status
*status
;
1111 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1113 if (skb_queue_empty(skb_list
))
1116 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1117 __skb_queue_purge(skb_list
);
1121 /* release frames from the reorder ring buffer */
1122 tid_agg_rx
->stored_mpdu_num
--;
1123 while ((skb
= __skb_dequeue(skb_list
))) {
1124 status
= IEEE80211_SKB_RXCB(skb
);
1125 status
->rx_flags
|= IEEE80211_RX_DEFERRED_RELEASE
;
1126 __skb_queue_tail(frames
, skb
);
1130 tid_agg_rx
->reorder_buf_filtered
&= ~BIT_ULL(index
);
1131 tid_agg_rx
->head_seq_num
= ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
1134 static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data
*sdata
,
1135 struct tid_ampdu_rx
*tid_agg_rx
,
1137 struct sk_buff_head
*frames
)
1141 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1143 while (ieee80211_sn_less(tid_agg_rx
->head_seq_num
, head_seq_num
)) {
1144 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1145 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
1151 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
1152 * the skb was added to the buffer longer than this time ago, the earlier
1153 * frames that have not yet been received are assumed to be lost and the skb
1154 * can be released for processing. This may also release other skb's from the
1155 * reorder buffer if there are no additional gaps between the frames.
1157 * Callers must hold tid_agg_rx->reorder_lock.
1159 #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
1161 static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data
*sdata
,
1162 struct tid_ampdu_rx
*tid_agg_rx
,
1163 struct sk_buff_head
*frames
)
1167 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1169 /* release the buffer until next missing frame */
1170 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1171 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, index
) &&
1172 tid_agg_rx
->stored_mpdu_num
) {
1174 * No buffers ready to be released, but check whether any
1175 * frames in the reorder buffer have timed out.
1178 for (j
= (index
+ 1) % tid_agg_rx
->buf_size
; j
!= index
;
1179 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
1180 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, j
)) {
1185 !time_after(jiffies
, tid_agg_rx
->reorder_time
[j
] +
1186 HT_RX_REORDER_BUF_TIMEOUT
))
1187 goto set_release_timer
;
1189 /* don't leave incomplete A-MSDUs around */
1190 for (i
= (index
+ 1) % tid_agg_rx
->buf_size
; i
!= j
;
1191 i
= (i
+ 1) % tid_agg_rx
->buf_size
)
1192 __skb_queue_purge(&tid_agg_rx
->reorder_buf
[i
]);
1194 ht_dbg_ratelimited(sdata
,
1195 "release an RX reorder frame due to timeout on earlier frames\n");
1196 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, j
,
1200 * Increment the head seq# also for the skipped slots.
1202 tid_agg_rx
->head_seq_num
=
1203 (tid_agg_rx
->head_seq_num
+
1204 skipped
) & IEEE80211_SN_MASK
;
1207 } else while (ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1208 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
1210 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1213 if (tid_agg_rx
->stored_mpdu_num
) {
1214 j
= index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1216 for (; j
!= (index
- 1) % tid_agg_rx
->buf_size
;
1217 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
1218 if (ieee80211_rx_reorder_ready(tid_agg_rx
, j
))
1224 if (!tid_agg_rx
->removed
)
1225 mod_timer(&tid_agg_rx
->reorder_timer
,
1226 tid_agg_rx
->reorder_time
[j
] + 1 +
1227 HT_RX_REORDER_BUF_TIMEOUT
);
1229 del_timer(&tid_agg_rx
->reorder_timer
);
1234 * As this function belongs to the RX path it must be under
1235 * rcu_read_lock protection. It returns false if the frame
1236 * can be processed immediately, true if it was consumed.
1238 static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data
*sdata
,
1239 struct tid_ampdu_rx
*tid_agg_rx
,
1240 struct sk_buff
*skb
,
1241 struct sk_buff_head
*frames
)
1243 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1244 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1245 u16 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1246 u16 mpdu_seq_num
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
1247 u16 head_seq_num
, buf_size
;
1251 spin_lock(&tid_agg_rx
->reorder_lock
);
1254 * Offloaded BA sessions have no known starting sequence number so pick
1255 * one from first Rxed frame for this tid after BA was started.
1257 if (unlikely(tid_agg_rx
->auto_seq
)) {
1258 tid_agg_rx
->auto_seq
= false;
1259 tid_agg_rx
->ssn
= mpdu_seq_num
;
1260 tid_agg_rx
->head_seq_num
= mpdu_seq_num
;
1263 buf_size
= tid_agg_rx
->buf_size
;
1264 head_seq_num
= tid_agg_rx
->head_seq_num
;
1267 * If the current MPDU's SN is smaller than the SSN, it shouldn't
1270 if (unlikely(!tid_agg_rx
->started
)) {
1271 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
1275 tid_agg_rx
->started
= true;
1278 /* frame with out of date sequence number */
1279 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
1285 * If frame the sequence number exceeds our buffering window
1286 * size release some previous frames to make room for this one.
1288 if (!ieee80211_sn_less(mpdu_seq_num
, head_seq_num
+ buf_size
)) {
1289 head_seq_num
= ieee80211_sn_inc(
1290 ieee80211_sn_sub(mpdu_seq_num
, buf_size
));
1291 /* release stored frames up to new head to stack */
1292 ieee80211_release_reorder_frames(sdata
, tid_agg_rx
,
1293 head_seq_num
, frames
);
1296 /* Now the new frame is always in the range of the reordering buffer */
1298 index
= mpdu_seq_num
% tid_agg_rx
->buf_size
;
1300 /* check if we already stored this frame */
1301 if (ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1307 * If the current MPDU is in the right order and nothing else
1308 * is stored we can process it directly, no need to buffer it.
1309 * If it is first but there's something stored, we may be able
1310 * to release frames after this one.
1312 if (mpdu_seq_num
== tid_agg_rx
->head_seq_num
&&
1313 tid_agg_rx
->stored_mpdu_num
== 0) {
1314 if (!(status
->flag
& RX_FLAG_AMSDU_MORE
))
1315 tid_agg_rx
->head_seq_num
=
1316 ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
1321 /* put the frame in the reordering buffer */
1322 __skb_queue_tail(&tid_agg_rx
->reorder_buf
[index
], skb
);
1323 if (!(status
->flag
& RX_FLAG_AMSDU_MORE
)) {
1324 tid_agg_rx
->reorder_time
[index
] = jiffies
;
1325 tid_agg_rx
->stored_mpdu_num
++;
1326 ieee80211_sta_reorder_release(sdata
, tid_agg_rx
, frames
);
1330 spin_unlock(&tid_agg_rx
->reorder_lock
);
1335 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
1336 * true if the MPDU was buffered, false if it should be processed.
1338 static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data
*rx
,
1339 struct sk_buff_head
*frames
)
1341 struct sk_buff
*skb
= rx
->skb
;
1342 struct ieee80211_local
*local
= rx
->local
;
1343 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1344 struct sta_info
*sta
= rx
->sta
;
1345 struct tid_ampdu_rx
*tid_agg_rx
;
1349 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
1350 is_multicast_ether_addr(hdr
->addr1
))
1354 * filter the QoS data rx stream according to
1355 * STA/TID and check if this STA/TID is on aggregation
1361 ack_policy
= *ieee80211_get_qos_ctl(hdr
) &
1362 IEEE80211_QOS_CTL_ACK_POLICY_MASK
;
1363 tid
= ieee80211_get_tid(hdr
);
1365 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
1367 if (ack_policy
== IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK
&&
1368 !test_bit(tid
, rx
->sta
->ampdu_mlme
.agg_session_valid
) &&
1369 !test_and_set_bit(tid
, rx
->sta
->ampdu_mlme
.unexpected_agg
))
1370 ieee80211_send_delba(rx
->sdata
, rx
->sta
->sta
.addr
, tid
,
1371 WLAN_BACK_RECIPIENT
,
1372 WLAN_REASON_QSTA_REQUIRE_SETUP
);
1376 /* qos null data frames are excluded */
1377 if (unlikely(hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_NULLFUNC
)))
1380 /* not part of a BA session */
1381 if (ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK
&&
1382 ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_NORMAL
)
1385 /* new, potentially un-ordered, ampdu frame - process it */
1387 /* reset session timer */
1388 if (tid_agg_rx
->timeout
)
1389 tid_agg_rx
->last_rx
= jiffies
;
1391 /* if this mpdu is fragmented - terminate rx aggregation session */
1392 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1393 if (sc
& IEEE80211_SCTL_FRAG
) {
1394 skb_queue_tail(&rx
->sdata
->skb_queue
, skb
);
1395 ieee80211_queue_work(&local
->hw
, &rx
->sdata
->work
);
1400 * No locking needed -- we will only ever process one
1401 * RX packet at a time, and thus own tid_agg_rx. All
1402 * other code manipulating it needs to (and does) make
1403 * sure that we cannot get to it any more before doing
1406 if (ieee80211_sta_manage_reorder_buf(rx
->sdata
, tid_agg_rx
, skb
,
1411 __skb_queue_tail(frames
, skb
);
1414 static ieee80211_rx_result debug_noinline
1415 ieee80211_rx_h_check_dup(struct ieee80211_rx_data
*rx
)
1417 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1418 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1420 if (status
->flag
& RX_FLAG_DUP_VALIDATED
)
1424 * Drop duplicate 802.11 retransmissions
1425 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
1428 if (rx
->skb
->len
< 24)
1431 if (ieee80211_is_ctl(hdr
->frame_control
) ||
1432 ieee80211_is_any_nullfunc(hdr
->frame_control
) ||
1433 is_multicast_ether_addr(hdr
->addr1
))
1439 if (unlikely(ieee80211_has_retry(hdr
->frame_control
) &&
1440 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] == hdr
->seq_ctrl
)) {
1441 I802_DEBUG_INC(rx
->local
->dot11FrameDuplicateCount
);
1442 rx
->sta
->rx_stats
.num_duplicates
++;
1443 return RX_DROP_UNUSABLE
;
1444 } else if (!(status
->flag
& RX_FLAG_AMSDU_MORE
)) {
1445 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] = hdr
->seq_ctrl
;
1451 static ieee80211_rx_result debug_noinline
1452 ieee80211_rx_h_check(struct ieee80211_rx_data
*rx
)
1454 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1456 /* Drop disallowed frame classes based on STA auth/assoc state;
1457 * IEEE 802.11, Chap 5.5.
1459 * mac80211 filters only based on association state, i.e. it drops
1460 * Class 3 frames from not associated stations. hostapd sends
1461 * deauth/disassoc frames when needed. In addition, hostapd is
1462 * responsible for filtering on both auth and assoc states.
1465 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1466 return ieee80211_rx_mesh_check(rx
);
1468 if (unlikely((ieee80211_is_data(hdr
->frame_control
) ||
1469 ieee80211_is_pspoll(hdr
->frame_control
)) &&
1470 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1471 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_OCB
&&
1472 (!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_ASSOC
)))) {
1474 * accept port control frames from the AP even when it's not
1475 * yet marked ASSOC to prevent a race where we don't set the
1476 * assoc bit quickly enough before it sends the first frame
1478 if (rx
->sta
&& rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1479 ieee80211_is_data_present(hdr
->frame_control
)) {
1480 unsigned int hdrlen
;
1483 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1485 if (rx
->skb
->len
< hdrlen
+ 8)
1486 return RX_DROP_MONITOR
;
1488 skb_copy_bits(rx
->skb
, hdrlen
+ 6, ðertype
, 2);
1489 if (ethertype
== rx
->sdata
->control_port_protocol
)
1493 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
1494 cfg80211_rx_spurious_frame(rx
->sdata
->dev
,
1497 return RX_DROP_UNUSABLE
;
1499 return RX_DROP_MONITOR
;
1506 static ieee80211_rx_result debug_noinline
1507 ieee80211_rx_h_check_more_data(struct ieee80211_rx_data
*rx
)
1509 struct ieee80211_local
*local
;
1510 struct ieee80211_hdr
*hdr
;
1511 struct sk_buff
*skb
;
1515 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1517 if (!local
->pspolling
)
1520 if (!ieee80211_has_fromds(hdr
->frame_control
))
1521 /* this is not from AP */
1524 if (!ieee80211_is_data(hdr
->frame_control
))
1527 if (!ieee80211_has_moredata(hdr
->frame_control
)) {
1528 /* AP has no more frames buffered for us */
1529 local
->pspolling
= false;
1533 /* more data bit is set, let's request a new frame from the AP */
1534 ieee80211_send_pspoll(local
, rx
->sdata
);
1539 static void sta_ps_start(struct sta_info
*sta
)
1541 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1542 struct ieee80211_local
*local
= sdata
->local
;
1546 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1547 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1548 ps
= &sdata
->bss
->ps
;
1552 atomic_inc(&ps
->num_sta_ps
);
1553 set_sta_flag(sta
, WLAN_STA_PS_STA
);
1554 if (!ieee80211_hw_check(&local
->hw
, AP_LINK_PS
))
1555 drv_sta_notify(local
, sdata
, STA_NOTIFY_SLEEP
, &sta
->sta
);
1556 ps_dbg(sdata
, "STA %pM aid %d enters power save mode\n",
1557 sta
->sta
.addr
, sta
->sta
.aid
);
1559 ieee80211_clear_fast_xmit(sta
);
1561 if (!sta
->sta
.txq
[0])
1564 for (tid
= 0; tid
< IEEE80211_NUM_TIDS
; tid
++) {
1565 struct ieee80211_txq
*txq
= sta
->sta
.txq
[tid
];
1566 struct txq_info
*txqi
= to_txq_info(txq
);
1568 spin_lock(&local
->active_txq_lock
[txq
->ac
]);
1569 if (!list_empty(&txqi
->schedule_order
))
1570 list_del_init(&txqi
->schedule_order
);
1571 spin_unlock(&local
->active_txq_lock
[txq
->ac
]);
1573 if (txq_has_queue(txq
))
1574 set_bit(tid
, &sta
->txq_buffered_tids
);
1576 clear_bit(tid
, &sta
->txq_buffered_tids
);
1580 static void sta_ps_end(struct sta_info
*sta
)
1582 ps_dbg(sta
->sdata
, "STA %pM aid %d exits power save mode\n",
1583 sta
->sta
.addr
, sta
->sta
.aid
);
1585 if (test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) {
1587 * Clear the flag only if the other one is still set
1588 * so that the TX path won't start TX'ing new frames
1589 * directly ... In the case that the driver flag isn't
1590 * set ieee80211_sta_ps_deliver_wakeup() will clear it.
1592 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
1593 ps_dbg(sta
->sdata
, "STA %pM aid %d driver-ps-blocked\n",
1594 sta
->sta
.addr
, sta
->sta
.aid
);
1598 set_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1599 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
1600 ieee80211_sta_ps_deliver_wakeup(sta
);
1603 int ieee80211_sta_ps_transition(struct ieee80211_sta
*pubsta
, bool start
)
1605 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1608 WARN_ON(!ieee80211_hw_check(&sta
->local
->hw
, AP_LINK_PS
));
1610 /* Don't let the same PS state be set twice */
1611 in_ps
= test_sta_flag(sta
, WLAN_STA_PS_STA
);
1612 if ((start
&& in_ps
) || (!start
&& !in_ps
))
1622 EXPORT_SYMBOL(ieee80211_sta_ps_transition
);
1624 void ieee80211_sta_pspoll(struct ieee80211_sta
*pubsta
)
1626 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1628 if (test_sta_flag(sta
, WLAN_STA_SP
))
1631 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1632 ieee80211_sta_ps_deliver_poll_response(sta
);
1634 set_sta_flag(sta
, WLAN_STA_PSPOLL
);
1636 EXPORT_SYMBOL(ieee80211_sta_pspoll
);
1638 void ieee80211_sta_uapsd_trigger(struct ieee80211_sta
*pubsta
, u8 tid
)
1640 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1641 int ac
= ieee80211_ac_from_tid(tid
);
1644 * If this AC is not trigger-enabled do nothing unless the
1645 * driver is calling us after it already checked.
1647 * NB: This could/should check a separate bitmap of trigger-
1648 * enabled queues, but for now we only implement uAPSD w/o
1649 * TSPEC changes to the ACs, so they're always the same.
1651 if (!(sta
->sta
.uapsd_queues
& ieee80211_ac_to_qos_mask
[ac
]) &&
1652 tid
!= IEEE80211_NUM_TIDS
)
1655 /* if we are in a service period, do nothing */
1656 if (test_sta_flag(sta
, WLAN_STA_SP
))
1659 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1660 ieee80211_sta_ps_deliver_uapsd(sta
);
1662 set_sta_flag(sta
, WLAN_STA_UAPSD
);
1664 EXPORT_SYMBOL(ieee80211_sta_uapsd_trigger
);
1666 static ieee80211_rx_result debug_noinline
1667 ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data
*rx
)
1669 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1670 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
1671 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1676 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
1677 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
)
1681 * The device handles station powersave, so don't do anything about
1682 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1683 * it to mac80211 since they're handled.)
1685 if (ieee80211_hw_check(&sdata
->local
->hw
, AP_LINK_PS
))
1689 * Don't do anything if the station isn't already asleep. In
1690 * the uAPSD case, the station will probably be marked asleep,
1691 * in the PS-Poll case the station must be confused ...
1693 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_STA
))
1696 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
))) {
1697 ieee80211_sta_pspoll(&rx
->sta
->sta
);
1699 /* Free PS Poll skb here instead of returning RX_DROP that would
1700 * count as an dropped frame. */
1701 dev_kfree_skb(rx
->skb
);
1704 } else if (!ieee80211_has_morefrags(hdr
->frame_control
) &&
1705 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1706 ieee80211_has_pm(hdr
->frame_control
) &&
1707 (ieee80211_is_data_qos(hdr
->frame_control
) ||
1708 ieee80211_is_qos_nullfunc(hdr
->frame_control
))) {
1709 u8 tid
= ieee80211_get_tid(hdr
);
1711 ieee80211_sta_uapsd_trigger(&rx
->sta
->sta
, tid
);
1717 static ieee80211_rx_result debug_noinline
1718 ieee80211_rx_h_sta_process(struct ieee80211_rx_data
*rx
)
1720 struct sta_info
*sta
= rx
->sta
;
1721 struct sk_buff
*skb
= rx
->skb
;
1722 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1723 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1730 * Update last_rx only for IBSS packets which are for the current
1731 * BSSID and for station already AUTHORIZED to avoid keeping the
1732 * current IBSS network alive in cases where other STAs start
1733 * using different BSSID. This will also give the station another
1734 * chance to restart the authentication/authorization in case
1735 * something went wrong the first time.
1737 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
1738 u8
*bssid
= ieee80211_get_bssid(hdr
, rx
->skb
->len
,
1739 NL80211_IFTYPE_ADHOC
);
1740 if (ether_addr_equal(bssid
, rx
->sdata
->u
.ibss
.bssid
) &&
1741 test_sta_flag(sta
, WLAN_STA_AUTHORIZED
)) {
1742 sta
->rx_stats
.last_rx
= jiffies
;
1743 if (ieee80211_is_data(hdr
->frame_control
) &&
1744 !is_multicast_ether_addr(hdr
->addr1
))
1745 sta
->rx_stats
.last_rate
=
1746 sta_stats_encode_rate(status
);
1748 } else if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
) {
1749 sta
->rx_stats
.last_rx
= jiffies
;
1750 } else if (!ieee80211_is_s1g_beacon(hdr
->frame_control
) &&
1751 !is_multicast_ether_addr(hdr
->addr1
)) {
1753 * Mesh beacons will update last_rx when if they are found to
1754 * match the current local configuration when processed.
1756 sta
->rx_stats
.last_rx
= jiffies
;
1757 if (ieee80211_is_data(hdr
->frame_control
))
1758 sta
->rx_stats
.last_rate
= sta_stats_encode_rate(status
);
1761 sta
->rx_stats
.fragments
++;
1763 u64_stats_update_begin(&rx
->sta
->rx_stats
.syncp
);
1764 sta
->rx_stats
.bytes
+= rx
->skb
->len
;
1765 u64_stats_update_end(&rx
->sta
->rx_stats
.syncp
);
1767 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
1768 sta
->rx_stats
.last_signal
= status
->signal
;
1769 ewma_signal_add(&sta
->rx_stats_avg
.signal
, -status
->signal
);
1772 if (status
->chains
) {
1773 sta
->rx_stats
.chains
= status
->chains
;
1774 for (i
= 0; i
< ARRAY_SIZE(status
->chain_signal
); i
++) {
1775 int signal
= status
->chain_signal
[i
];
1777 if (!(status
->chains
& BIT(i
)))
1780 sta
->rx_stats
.chain_signal_last
[i
] = signal
;
1781 ewma_signal_add(&sta
->rx_stats_avg
.chain_signal
[i
],
1786 if (ieee80211_is_s1g_beacon(hdr
->frame_control
))
1790 * Change STA power saving mode only at the end of a frame
1791 * exchange sequence, and only for a data or management
1792 * frame as specified in IEEE 802.11-2016 11.2.3.2
1794 if (!ieee80211_hw_check(&sta
->local
->hw
, AP_LINK_PS
) &&
1795 !ieee80211_has_morefrags(hdr
->frame_control
) &&
1796 !is_multicast_ether_addr(hdr
->addr1
) &&
1797 (ieee80211_is_mgmt(hdr
->frame_control
) ||
1798 ieee80211_is_data(hdr
->frame_control
)) &&
1799 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1800 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1801 rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)) {
1802 if (test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1803 if (!ieee80211_has_pm(hdr
->frame_control
))
1806 if (ieee80211_has_pm(hdr
->frame_control
))
1811 /* mesh power save support */
1812 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1813 ieee80211_mps_rx_h_sta_process(sta
, hdr
);
1816 * Drop (qos-)data::nullfunc frames silently, since they
1817 * are used only to control station power saving mode.
1819 if (ieee80211_is_any_nullfunc(hdr
->frame_control
)) {
1820 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_nullfunc
);
1823 * If we receive a 4-addr nullfunc frame from a STA
1824 * that was not moved to a 4-addr STA vlan yet send
1825 * the event to userspace and for older hostapd drop
1826 * the frame to the monitor interface.
1828 if (ieee80211_has_a4(hdr
->frame_control
) &&
1829 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1830 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1831 !rx
->sdata
->u
.vlan
.sta
))) {
1832 if (!test_and_set_sta_flag(sta
, WLAN_STA_4ADDR_EVENT
))
1833 cfg80211_rx_unexpected_4addr_frame(
1834 rx
->sdata
->dev
, sta
->sta
.addr
,
1836 return RX_DROP_MONITOR
;
1839 * Update counter and free packet here to avoid
1840 * counting this as a dropped packed.
1842 sta
->rx_stats
.packets
++;
1843 dev_kfree_skb(rx
->skb
);
1848 } /* ieee80211_rx_h_sta_process */
1850 static struct ieee80211_key
*
1851 ieee80211_rx_get_bigtk(struct ieee80211_rx_data
*rx
, int idx
)
1853 struct ieee80211_key
*key
= NULL
;
1854 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1857 /* Make sure key gets set if either BIGTK key index is set so that
1858 * ieee80211_drop_unencrypted_mgmt() can properly drop both unprotected
1859 * Beacon frames and Beacon frames that claim to use another BIGTK key
1860 * index (i.e., a key that we do not have).
1864 idx
= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
;
1867 if (idx
== NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
)
1874 key
= rcu_dereference(rx
->sta
->gtk
[idx
]);
1876 key
= rcu_dereference(sdata
->keys
[idx
]);
1877 if (!key
&& rx
->sta
)
1878 key
= rcu_dereference(rx
->sta
->gtk
[idx2
]);
1880 key
= rcu_dereference(sdata
->keys
[idx2
]);
1885 static ieee80211_rx_result debug_noinline
1886 ieee80211_rx_h_decrypt(struct ieee80211_rx_data
*rx
)
1888 struct sk_buff
*skb
= rx
->skb
;
1889 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1890 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1892 ieee80211_rx_result result
= RX_DROP_UNUSABLE
;
1893 struct ieee80211_key
*sta_ptk
= NULL
;
1894 struct ieee80211_key
*ptk_idx
= NULL
;
1895 int mmie_keyidx
= -1;
1897 const struct ieee80211_cipher_scheme
*cs
= NULL
;
1899 if (ieee80211_is_ext(hdr
->frame_control
))
1905 * There are five types of keys:
1906 * - GTK (group keys)
1907 * - IGTK (group keys for management frames)
1908 * - BIGTK (group keys for Beacon frames)
1909 * - PTK (pairwise keys)
1910 * - STK (station-to-station pairwise keys)
1912 * When selecting a key, we have to distinguish between multicast
1913 * (including broadcast) and unicast frames, the latter can only
1914 * use PTKs and STKs while the former always use GTKs, IGTKs, and
1915 * BIGTKs. Unless, of course, actual WEP keys ("pre-RSNA") are used,
1916 * then unicast frames can also use key indices like GTKs. Hence, if we
1917 * don't have a PTK/STK we check the key index for a WEP key.
1919 * Note that in a regular BSS, multicast frames are sent by the
1920 * AP only, associated stations unicast the frame to the AP first
1921 * which then multicasts it on their behalf.
1923 * There is also a slight problem in IBSS mode: GTKs are negotiated
1924 * with each station, that is something we don't currently handle.
1925 * The spec seems to expect that one negotiates the same key with
1926 * every station but there's no such requirement; VLANs could be
1930 /* start without a key */
1932 fc
= hdr
->frame_control
;
1935 int keyid
= rx
->sta
->ptk_idx
;
1936 sta_ptk
= rcu_dereference(rx
->sta
->ptk
[keyid
]);
1938 if (ieee80211_has_protected(fc
)) {
1939 cs
= rx
->sta
->cipher_scheme
;
1940 keyid
= ieee80211_get_keyid(rx
->skb
, cs
);
1942 if (unlikely(keyid
< 0))
1943 return RX_DROP_UNUSABLE
;
1945 ptk_idx
= rcu_dereference(rx
->sta
->ptk
[keyid
]);
1949 if (!ieee80211_has_protected(fc
))
1950 mmie_keyidx
= ieee80211_get_mmie_keyidx(rx
->skb
);
1952 if (!is_multicast_ether_addr(hdr
->addr1
) && sta_ptk
) {
1953 rx
->key
= ptk_idx
? ptk_idx
: sta_ptk
;
1954 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1955 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1957 /* Skip decryption if the frame is not protected. */
1958 if (!ieee80211_has_protected(fc
))
1960 } else if (mmie_keyidx
>= 0 && ieee80211_is_beacon(fc
)) {
1961 /* Broadcast/multicast robust management frame / BIP */
1962 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1963 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1966 if (mmie_keyidx
< NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
||
1967 mmie_keyidx
>= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
+
1968 NUM_DEFAULT_BEACON_KEYS
) {
1969 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
1972 return RX_DROP_MONITOR
; /* unexpected BIP keyidx */
1975 rx
->key
= ieee80211_rx_get_bigtk(rx
, mmie_keyidx
);
1977 return RX_CONTINUE
; /* Beacon protection not in use */
1978 } else if (mmie_keyidx
>= 0) {
1979 /* Broadcast/multicast robust management frame / BIP */
1980 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1981 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1984 if (mmie_keyidx
< NUM_DEFAULT_KEYS
||
1985 mmie_keyidx
>= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
)
1986 return RX_DROP_MONITOR
; /* unexpected BIP keyidx */
1988 if (ieee80211_is_group_privacy_action(skb
) &&
1989 test_sta_flag(rx
->sta
, WLAN_STA_MFP
))
1990 return RX_DROP_MONITOR
;
1992 rx
->key
= rcu_dereference(rx
->sta
->gtk
[mmie_keyidx
]);
1995 rx
->key
= rcu_dereference(rx
->sdata
->keys
[mmie_keyidx
]);
1996 } else if (!ieee80211_has_protected(fc
)) {
1998 * The frame was not protected, so skip decryption. However, we
1999 * need to set rx->key if there is a key that could have been
2000 * used so that the frame may be dropped if encryption would
2001 * have been expected.
2003 struct ieee80211_key
*key
= NULL
;
2004 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2007 if (ieee80211_is_beacon(fc
)) {
2008 key
= ieee80211_rx_get_bigtk(rx
, -1);
2009 } else if (ieee80211_is_mgmt(fc
) &&
2010 is_multicast_ether_addr(hdr
->addr1
)) {
2011 key
= rcu_dereference(rx
->sdata
->default_mgmt_key
);
2014 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
2015 key
= rcu_dereference(rx
->sta
->gtk
[i
]);
2021 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
2022 key
= rcu_dereference(sdata
->keys
[i
]);
2033 * The device doesn't give us the IV so we won't be
2034 * able to look up the key. That's ok though, we
2035 * don't need to decrypt the frame, we just won't
2036 * be able to keep statistics accurate.
2037 * Except for key threshold notifications, should
2038 * we somehow allow the driver to tell us which key
2039 * the hardware used if this flag is set?
2041 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
2042 (status
->flag
& RX_FLAG_IV_STRIPPED
))
2045 keyidx
= ieee80211_get_keyid(rx
->skb
, cs
);
2047 if (unlikely(keyidx
< 0))
2048 return RX_DROP_UNUSABLE
;
2050 /* check per-station GTK first, if multicast packet */
2051 if (is_multicast_ether_addr(hdr
->addr1
) && rx
->sta
)
2052 rx
->key
= rcu_dereference(rx
->sta
->gtk
[keyidx
]);
2054 /* if not found, try default key */
2056 rx
->key
= rcu_dereference(rx
->sdata
->keys
[keyidx
]);
2059 * RSNA-protected unicast frames should always be
2060 * sent with pairwise or station-to-station keys,
2061 * but for WEP we allow using a key index as well.
2064 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP40
&&
2065 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP104
&&
2066 !is_multicast_ether_addr(hdr
->addr1
))
2072 if (unlikely(rx
->key
->flags
& KEY_FLAG_TAINTED
))
2073 return RX_DROP_MONITOR
;
2075 /* TODO: add threshold stuff again */
2077 return RX_DROP_MONITOR
;
2080 switch (rx
->key
->conf
.cipher
) {
2081 case WLAN_CIPHER_SUITE_WEP40
:
2082 case WLAN_CIPHER_SUITE_WEP104
:
2083 result
= ieee80211_crypto_wep_decrypt(rx
);
2085 case WLAN_CIPHER_SUITE_TKIP
:
2086 result
= ieee80211_crypto_tkip_decrypt(rx
);
2088 case WLAN_CIPHER_SUITE_CCMP
:
2089 result
= ieee80211_crypto_ccmp_decrypt(
2090 rx
, IEEE80211_CCMP_MIC_LEN
);
2092 case WLAN_CIPHER_SUITE_CCMP_256
:
2093 result
= ieee80211_crypto_ccmp_decrypt(
2094 rx
, IEEE80211_CCMP_256_MIC_LEN
);
2096 case WLAN_CIPHER_SUITE_AES_CMAC
:
2097 result
= ieee80211_crypto_aes_cmac_decrypt(rx
);
2099 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
2100 result
= ieee80211_crypto_aes_cmac_256_decrypt(rx
);
2102 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
2103 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
2104 result
= ieee80211_crypto_aes_gmac_decrypt(rx
);
2106 case WLAN_CIPHER_SUITE_GCMP
:
2107 case WLAN_CIPHER_SUITE_GCMP_256
:
2108 result
= ieee80211_crypto_gcmp_decrypt(rx
);
2111 result
= ieee80211_crypto_hw_decrypt(rx
);
2114 /* the hdr variable is invalid after the decrypt handlers */
2116 /* either the frame has been decrypted or will be dropped */
2117 status
->flag
|= RX_FLAG_DECRYPTED
;
2119 if (unlikely(ieee80211_is_beacon(fc
) && result
== RX_DROP_UNUSABLE
))
2120 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2121 skb
->data
, skb
->len
);
2126 static inline struct ieee80211_fragment_entry
*
2127 ieee80211_reassemble_add(struct ieee80211_sub_if_data
*sdata
,
2128 unsigned int frag
, unsigned int seq
, int rx_queue
,
2129 struct sk_buff
**skb
)
2131 struct ieee80211_fragment_entry
*entry
;
2133 entry
= &sdata
->fragments
[sdata
->fragment_next
++];
2134 if (sdata
->fragment_next
>= IEEE80211_FRAGMENT_MAX
)
2135 sdata
->fragment_next
= 0;
2137 if (!skb_queue_empty(&entry
->skb_list
))
2138 __skb_queue_purge(&entry
->skb_list
);
2140 __skb_queue_tail(&entry
->skb_list
, *skb
); /* no need for locking */
2142 entry
->first_frag_time
= jiffies
;
2144 entry
->rx_queue
= rx_queue
;
2145 entry
->last_frag
= frag
;
2146 entry
->check_sequential_pn
= false;
2147 entry
->extra_len
= 0;
2152 static inline struct ieee80211_fragment_entry
*
2153 ieee80211_reassemble_find(struct ieee80211_sub_if_data
*sdata
,
2154 unsigned int frag
, unsigned int seq
,
2155 int rx_queue
, struct ieee80211_hdr
*hdr
)
2157 struct ieee80211_fragment_entry
*entry
;
2160 idx
= sdata
->fragment_next
;
2161 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++) {
2162 struct ieee80211_hdr
*f_hdr
;
2163 struct sk_buff
*f_skb
;
2167 idx
= IEEE80211_FRAGMENT_MAX
- 1;
2169 entry
= &sdata
->fragments
[idx
];
2170 if (skb_queue_empty(&entry
->skb_list
) || entry
->seq
!= seq
||
2171 entry
->rx_queue
!= rx_queue
||
2172 entry
->last_frag
+ 1 != frag
)
2175 f_skb
= __skb_peek(&entry
->skb_list
);
2176 f_hdr
= (struct ieee80211_hdr
*) f_skb
->data
;
2179 * Check ftype and addresses are equal, else check next fragment
2181 if (((hdr
->frame_control
^ f_hdr
->frame_control
) &
2182 cpu_to_le16(IEEE80211_FCTL_FTYPE
)) ||
2183 !ether_addr_equal(hdr
->addr1
, f_hdr
->addr1
) ||
2184 !ether_addr_equal(hdr
->addr2
, f_hdr
->addr2
))
2187 if (time_after(jiffies
, entry
->first_frag_time
+ 2 * HZ
)) {
2188 __skb_queue_purge(&entry
->skb_list
);
2197 static ieee80211_rx_result debug_noinline
2198 ieee80211_rx_h_defragment(struct ieee80211_rx_data
*rx
)
2200 struct ieee80211_hdr
*hdr
;
2203 unsigned int frag
, seq
;
2204 struct ieee80211_fragment_entry
*entry
;
2205 struct sk_buff
*skb
;
2207 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2208 fc
= hdr
->frame_control
;
2210 if (ieee80211_is_ctl(fc
) || ieee80211_is_ext(fc
))
2213 sc
= le16_to_cpu(hdr
->seq_ctrl
);
2214 frag
= sc
& IEEE80211_SCTL_FRAG
;
2216 if (is_multicast_ether_addr(hdr
->addr1
)) {
2217 I802_DEBUG_INC(rx
->local
->dot11MulticastReceivedFrameCount
);
2221 if (likely(!ieee80211_has_morefrags(fc
) && frag
== 0))
2224 I802_DEBUG_INC(rx
->local
->rx_handlers_fragments
);
2226 if (skb_linearize(rx
->skb
))
2227 return RX_DROP_UNUSABLE
;
2230 * skb_linearize() might change the skb->data and
2231 * previously cached variables (in this case, hdr) need to
2232 * be refreshed with the new data.
2234 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2235 seq
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
2238 /* This is the first fragment of a new frame. */
2239 entry
= ieee80211_reassemble_add(rx
->sdata
, frag
, seq
,
2240 rx
->seqno_idx
, &(rx
->skb
));
2242 (rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP
||
2243 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP_256
||
2244 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_GCMP
||
2245 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_GCMP_256
) &&
2246 ieee80211_has_protected(fc
)) {
2247 int queue
= rx
->security_idx
;
2249 /* Store CCMP/GCMP PN so that we can verify that the
2250 * next fragment has a sequential PN value.
2252 entry
->check_sequential_pn
= true;
2253 memcpy(entry
->last_pn
,
2254 rx
->key
->u
.ccmp
.rx_pn
[queue
],
2255 IEEE80211_CCMP_PN_LEN
);
2256 BUILD_BUG_ON(offsetof(struct ieee80211_key
,
2258 offsetof(struct ieee80211_key
,
2260 BUILD_BUG_ON(sizeof(rx
->key
->u
.ccmp
.rx_pn
[queue
]) !=
2261 sizeof(rx
->key
->u
.gcmp
.rx_pn
[queue
]));
2262 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN
!=
2263 IEEE80211_GCMP_PN_LEN
);
2268 /* This is a fragment for a frame that should already be pending in
2269 * fragment cache. Add this fragment to the end of the pending entry.
2271 entry
= ieee80211_reassemble_find(rx
->sdata
, frag
, seq
,
2272 rx
->seqno_idx
, hdr
);
2274 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
2275 return RX_DROP_MONITOR
;
2278 /* "The receiver shall discard MSDUs and MMPDUs whose constituent
2279 * MPDU PN values are not incrementing in steps of 1."
2280 * see IEEE P802.11-REVmc/D5.0, 12.5.3.4.4, item d (for CCMP)
2281 * and IEEE P802.11-REVmc/D5.0, 12.5.5.4.4, item d (for GCMP)
2283 if (entry
->check_sequential_pn
) {
2285 u8 pn
[IEEE80211_CCMP_PN_LEN
], *rpn
;
2289 (rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_CCMP
&&
2290 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_CCMP_256
&&
2291 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_GCMP
&&
2292 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_GCMP_256
))
2293 return RX_DROP_UNUSABLE
;
2294 memcpy(pn
, entry
->last_pn
, IEEE80211_CCMP_PN_LEN
);
2295 for (i
= IEEE80211_CCMP_PN_LEN
- 1; i
>= 0; i
--) {
2300 queue
= rx
->security_idx
;
2301 rpn
= rx
->key
->u
.ccmp
.rx_pn
[queue
];
2302 if (memcmp(pn
, rpn
, IEEE80211_CCMP_PN_LEN
))
2303 return RX_DROP_UNUSABLE
;
2304 memcpy(entry
->last_pn
, pn
, IEEE80211_CCMP_PN_LEN
);
2307 skb_pull(rx
->skb
, ieee80211_hdrlen(fc
));
2308 __skb_queue_tail(&entry
->skb_list
, rx
->skb
);
2309 entry
->last_frag
= frag
;
2310 entry
->extra_len
+= rx
->skb
->len
;
2311 if (ieee80211_has_morefrags(fc
)) {
2316 rx
->skb
= __skb_dequeue(&entry
->skb_list
);
2317 if (skb_tailroom(rx
->skb
) < entry
->extra_len
) {
2318 I802_DEBUG_INC(rx
->local
->rx_expand_skb_head_defrag
);
2319 if (unlikely(pskb_expand_head(rx
->skb
, 0, entry
->extra_len
,
2321 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
2322 __skb_queue_purge(&entry
->skb_list
);
2323 return RX_DROP_UNUSABLE
;
2326 while ((skb
= __skb_dequeue(&entry
->skb_list
))) {
2327 skb_put_data(rx
->skb
, skb
->data
, skb
->len
);
2332 ieee80211_led_rx(rx
->local
);
2335 rx
->sta
->rx_stats
.packets
++;
2339 static int ieee80211_802_1x_port_control(struct ieee80211_rx_data
*rx
)
2341 if (unlikely(!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_AUTHORIZED
)))
2347 static int ieee80211_drop_unencrypted(struct ieee80211_rx_data
*rx
, __le16 fc
)
2349 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
2350 struct sk_buff
*skb
= rx
->skb
;
2351 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2354 * Pass through unencrypted frames if the hardware has
2355 * decrypted them already.
2357 if (status
->flag
& RX_FLAG_DECRYPTED
)
2360 /* check mesh EAPOL frames first */
2361 if (unlikely(rx
->sta
&& ieee80211_vif_is_mesh(&rx
->sdata
->vif
) &&
2362 ieee80211_is_data(fc
))) {
2363 struct ieee80211s_hdr
*mesh_hdr
;
2364 u16 hdr_len
= ieee80211_hdrlen(fc
);
2365 u16 ethertype_offset
;
2368 if (!ether_addr_equal(hdr
->addr1
, rx
->sdata
->vif
.addr
))
2371 /* make sure fixed part of mesh header is there, also checks skb len */
2372 if (!pskb_may_pull(rx
->skb
, hdr_len
+ 6))
2375 mesh_hdr
= (struct ieee80211s_hdr
*)(skb
->data
+ hdr_len
);
2376 ethertype_offset
= hdr_len
+ ieee80211_get_mesh_hdrlen(mesh_hdr
) +
2377 sizeof(rfc1042_header
);
2379 if (skb_copy_bits(rx
->skb
, ethertype_offset
, ðertype
, 2) == 0 &&
2380 ethertype
== rx
->sdata
->control_port_protocol
)
2385 /* Drop unencrypted frames if key is set. */
2386 if (unlikely(!ieee80211_has_protected(fc
) &&
2387 !ieee80211_is_any_nullfunc(fc
) &&
2388 ieee80211_is_data(fc
) && rx
->key
))
2394 static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data
*rx
)
2396 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2397 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2398 __le16 fc
= hdr
->frame_control
;
2401 * Pass through unencrypted frames if the hardware has
2402 * decrypted them already.
2404 if (status
->flag
& RX_FLAG_DECRYPTED
)
2407 if (rx
->sta
&& test_sta_flag(rx
->sta
, WLAN_STA_MFP
)) {
2408 if (unlikely(!ieee80211_has_protected(fc
) &&
2409 ieee80211_is_unicast_robust_mgmt_frame(rx
->skb
) &&
2411 if (ieee80211_is_deauth(fc
) ||
2412 ieee80211_is_disassoc(fc
))
2413 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2418 /* BIP does not use Protected field, so need to check MMIE */
2419 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx
->skb
) &&
2420 ieee80211_get_mmie_keyidx(rx
->skb
) < 0)) {
2421 if (ieee80211_is_deauth(fc
) ||
2422 ieee80211_is_disassoc(fc
))
2423 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2428 if (unlikely(ieee80211_is_beacon(fc
) && rx
->key
&&
2429 ieee80211_get_mmie_keyidx(rx
->skb
) < 0)) {
2430 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2436 * When using MFP, Action frames are not allowed prior to
2437 * having configured keys.
2439 if (unlikely(ieee80211_is_action(fc
) && !rx
->key
&&
2440 ieee80211_is_robust_mgmt_frame(rx
->skb
)))
2448 __ieee80211_data_to_8023(struct ieee80211_rx_data
*rx
, bool *port_control
)
2450 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2451 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2452 bool check_port_control
= false;
2453 struct ethhdr
*ehdr
;
2456 *port_control
= false;
2457 if (ieee80211_has_a4(hdr
->frame_control
) &&
2458 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& !sdata
->u
.vlan
.sta
)
2461 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
2462 !!sdata
->u
.mgd
.use_4addr
!= !!ieee80211_has_a4(hdr
->frame_control
)) {
2464 if (!sdata
->u
.mgd
.use_4addr
)
2466 else if (!ether_addr_equal(hdr
->addr1
, sdata
->vif
.addr
))
2467 check_port_control
= true;
2470 if (is_multicast_ether_addr(hdr
->addr1
) &&
2471 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& sdata
->u
.vlan
.sta
)
2474 ret
= ieee80211_data_to_8023(rx
->skb
, sdata
->vif
.addr
, sdata
->vif
.type
);
2478 ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2479 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
)
2480 *port_control
= true;
2481 else if (check_port_control
)
2488 * requires that rx->skb is a frame with ethernet header
2490 static bool ieee80211_frame_allowed(struct ieee80211_rx_data
*rx
, __le16 fc
)
2492 static const u8 pae_group_addr
[ETH_ALEN
] __aligned(2)
2493 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
2494 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2497 * Allow EAPOL frames to us/the PAE group address regardless
2498 * of whether the frame was encrypted or not.
2500 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
&&
2501 (ether_addr_equal(ehdr
->h_dest
, rx
->sdata
->vif
.addr
) ||
2502 ether_addr_equal(ehdr
->h_dest
, pae_group_addr
)))
2505 if (ieee80211_802_1x_port_control(rx
) ||
2506 ieee80211_drop_unencrypted(rx
, fc
))
2512 static void ieee80211_deliver_skb_to_local_stack(struct sk_buff
*skb
,
2513 struct ieee80211_rx_data
*rx
)
2515 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2516 struct net_device
*dev
= sdata
->dev
;
2518 if (unlikely((skb
->protocol
== sdata
->control_port_protocol
||
2519 (skb
->protocol
== cpu_to_be16(ETH_P_PREAUTH
) &&
2520 !sdata
->control_port_no_preauth
)) &&
2521 sdata
->control_port_over_nl80211
)) {
2522 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2523 bool noencrypt
= !(status
->flag
& RX_FLAG_DECRYPTED
);
2525 cfg80211_rx_control_port(dev
, skb
, noencrypt
);
2528 memset(skb
->cb
, 0, sizeof(skb
->cb
));
2530 /* deliver to local stack */
2532 list_add_tail(&skb
->list
, rx
->list
);
2534 netif_receive_skb(skb
);
2539 * requires that rx->skb is a frame with ethernet header
2542 ieee80211_deliver_skb(struct ieee80211_rx_data
*rx
)
2544 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2545 struct net_device
*dev
= sdata
->dev
;
2546 struct sk_buff
*skb
, *xmit_skb
;
2547 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2548 struct sta_info
*dsta
;
2553 dev_sw_netstats_rx_add(dev
, skb
->len
);
2556 /* The seqno index has the same property as needed
2557 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
2558 * for non-QoS-data frames. Here we know it's a data
2559 * frame, so count MSDUs.
2561 u64_stats_update_begin(&rx
->sta
->rx_stats
.syncp
);
2562 rx
->sta
->rx_stats
.msdu
[rx
->seqno_idx
]++;
2563 u64_stats_update_end(&rx
->sta
->rx_stats
.syncp
);
2566 if ((sdata
->vif
.type
== NL80211_IFTYPE_AP
||
2567 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) &&
2568 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
2569 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
|| !sdata
->u
.vlan
.sta
)) {
2570 if (is_multicast_ether_addr(ehdr
->h_dest
) &&
2571 ieee80211_vif_get_num_mcast_if(sdata
) != 0) {
2573 * send multicast frames both to higher layers in
2574 * local net stack and back to the wireless medium
2576 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
2578 net_info_ratelimited("%s: failed to clone multicast frame\n",
2580 } else if (!is_multicast_ether_addr(ehdr
->h_dest
) &&
2581 !ether_addr_equal(ehdr
->h_dest
, ehdr
->h_source
)) {
2582 dsta
= sta_info_get(sdata
, ehdr
->h_dest
);
2585 * The destination station is associated to
2586 * this AP (in this VLAN), so send the frame
2587 * directly to it and do not pass it to local
2596 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
2598 /* 'align' will only take the values 0 or 2 here since all
2599 * frames are required to be aligned to 2-byte boundaries
2600 * when being passed to mac80211; the code here works just
2601 * as well if that isn't true, but mac80211 assumes it can
2602 * access fields as 2-byte aligned (e.g. for ether_addr_equal)
2606 align
= (unsigned long)(skb
->data
+ sizeof(struct ethhdr
)) & 3;
2608 if (WARN_ON(skb_headroom(skb
) < 3)) {
2612 u8
*data
= skb
->data
;
2613 size_t len
= skb_headlen(skb
);
2615 memmove(skb
->data
, data
, len
);
2616 skb_set_tail_pointer(skb
, len
);
2623 skb
->protocol
= eth_type_trans(skb
, dev
);
2624 ieee80211_deliver_skb_to_local_stack(skb
, rx
);
2629 * Send to wireless media and increase priority by 256 to
2630 * keep the received priority instead of reclassifying
2631 * the frame (see cfg80211_classify8021d).
2633 xmit_skb
->priority
+= 256;
2634 xmit_skb
->protocol
= htons(ETH_P_802_3
);
2635 skb_reset_network_header(xmit_skb
);
2636 skb_reset_mac_header(xmit_skb
);
2637 dev_queue_xmit(xmit_skb
);
2641 static ieee80211_rx_result debug_noinline
2642 __ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
, u8 data_offset
)
2644 struct net_device
*dev
= rx
->sdata
->dev
;
2645 struct sk_buff
*skb
= rx
->skb
;
2646 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
2647 __le16 fc
= hdr
->frame_control
;
2648 struct sk_buff_head frame_list
;
2649 struct ethhdr ethhdr
;
2650 const u8
*check_da
= ethhdr
.h_dest
, *check_sa
= ethhdr
.h_source
;
2652 if (unlikely(ieee80211_has_a4(hdr
->frame_control
))) {
2655 } else switch (rx
->sdata
->vif
.type
) {
2656 case NL80211_IFTYPE_AP
:
2657 case NL80211_IFTYPE_AP_VLAN
:
2660 case NL80211_IFTYPE_STATION
:
2662 !test_sta_flag(rx
->sta
, WLAN_STA_TDLS_PEER
))
2665 case NL80211_IFTYPE_MESH_POINT
:
2673 __skb_queue_head_init(&frame_list
);
2675 if (ieee80211_data_to_8023_exthdr(skb
, ðhdr
,
2676 rx
->sdata
->vif
.addr
,
2677 rx
->sdata
->vif
.type
,
2679 return RX_DROP_UNUSABLE
;
2681 ieee80211_amsdu_to_8023s(skb
, &frame_list
, dev
->dev_addr
,
2682 rx
->sdata
->vif
.type
,
2683 rx
->local
->hw
.extra_tx_headroom
,
2684 check_da
, check_sa
);
2686 while (!skb_queue_empty(&frame_list
)) {
2687 rx
->skb
= __skb_dequeue(&frame_list
);
2689 if (!ieee80211_frame_allowed(rx
, fc
)) {
2690 dev_kfree_skb(rx
->skb
);
2694 ieee80211_deliver_skb(rx
);
2700 static ieee80211_rx_result debug_noinline
2701 ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
)
2703 struct sk_buff
*skb
= rx
->skb
;
2704 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2705 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
2706 __le16 fc
= hdr
->frame_control
;
2708 if (!(status
->rx_flags
& IEEE80211_RX_AMSDU
))
2711 if (unlikely(!ieee80211_is_data(fc
)))
2714 if (unlikely(!ieee80211_is_data_present(fc
)))
2715 return RX_DROP_MONITOR
;
2717 if (unlikely(ieee80211_has_a4(hdr
->frame_control
))) {
2718 switch (rx
->sdata
->vif
.type
) {
2719 case NL80211_IFTYPE_AP_VLAN
:
2720 if (!rx
->sdata
->u
.vlan
.sta
)
2721 return RX_DROP_UNUSABLE
;
2723 case NL80211_IFTYPE_STATION
:
2724 if (!rx
->sdata
->u
.mgd
.use_4addr
)
2725 return RX_DROP_UNUSABLE
;
2728 return RX_DROP_UNUSABLE
;
2732 if (is_multicast_ether_addr(hdr
->addr1
))
2733 return RX_DROP_UNUSABLE
;
2735 return __ieee80211_rx_h_amsdu(rx
, 0);
2738 #ifdef CONFIG_MAC80211_MESH
2739 static ieee80211_rx_result
2740 ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data
*rx
)
2742 struct ieee80211_hdr
*fwd_hdr
, *hdr
;
2743 struct ieee80211_tx_info
*info
;
2744 struct ieee80211s_hdr
*mesh_hdr
;
2745 struct sk_buff
*skb
= rx
->skb
, *fwd_skb
;
2746 struct ieee80211_local
*local
= rx
->local
;
2747 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2748 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2752 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2753 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
2755 /* make sure fixed part of mesh header is there, also checks skb len */
2756 if (!pskb_may_pull(rx
->skb
, hdrlen
+ 6))
2757 return RX_DROP_MONITOR
;
2759 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2761 /* make sure full mesh header is there, also checks skb len */
2762 if (!pskb_may_pull(rx
->skb
,
2763 hdrlen
+ ieee80211_get_mesh_hdrlen(mesh_hdr
)))
2764 return RX_DROP_MONITOR
;
2766 /* reload pointers */
2767 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2768 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2770 if (ieee80211_drop_unencrypted(rx
, hdr
->frame_control
))
2771 return RX_DROP_MONITOR
;
2773 /* frame is in RMC, don't forward */
2774 if (ieee80211_is_data(hdr
->frame_control
) &&
2775 is_multicast_ether_addr(hdr
->addr1
) &&
2776 mesh_rmc_check(rx
->sdata
, hdr
->addr3
, mesh_hdr
))
2777 return RX_DROP_MONITOR
;
2779 if (!ieee80211_is_data(hdr
->frame_control
))
2783 return RX_DROP_MONITOR
;
2785 if (mesh_hdr
->flags
& MESH_FLAGS_AE
) {
2786 struct mesh_path
*mppath
;
2790 if (is_multicast_ether_addr(hdr
->addr1
)) {
2791 mpp_addr
= hdr
->addr3
;
2792 proxied_addr
= mesh_hdr
->eaddr1
;
2793 } else if ((mesh_hdr
->flags
& MESH_FLAGS_AE
) ==
2794 MESH_FLAGS_AE_A5_A6
) {
2795 /* has_a4 already checked in ieee80211_rx_mesh_check */
2796 mpp_addr
= hdr
->addr4
;
2797 proxied_addr
= mesh_hdr
->eaddr2
;
2799 return RX_DROP_MONITOR
;
2803 mppath
= mpp_path_lookup(sdata
, proxied_addr
);
2805 mpp_path_add(sdata
, proxied_addr
, mpp_addr
);
2807 spin_lock_bh(&mppath
->state_lock
);
2808 if (!ether_addr_equal(mppath
->mpp
, mpp_addr
))
2809 memcpy(mppath
->mpp
, mpp_addr
, ETH_ALEN
);
2810 mppath
->exp_time
= jiffies
;
2811 spin_unlock_bh(&mppath
->state_lock
);
2816 /* Frame has reached destination. Don't forward */
2817 if (!is_multicast_ether_addr(hdr
->addr1
) &&
2818 ether_addr_equal(sdata
->vif
.addr
, hdr
->addr3
))
2821 ac
= ieee80211_select_queue_80211(sdata
, skb
, hdr
);
2822 q
= sdata
->vif
.hw_queue
[ac
];
2823 if (ieee80211_queue_stopped(&local
->hw
, q
)) {
2824 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_congestion
);
2825 return RX_DROP_MONITOR
;
2827 skb_set_queue_mapping(skb
, q
);
2829 if (!--mesh_hdr
->ttl
) {
2830 if (!is_multicast_ether_addr(hdr
->addr1
))
2831 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
,
2832 dropped_frames_ttl
);
2836 if (!ifmsh
->mshcfg
.dot11MeshForwarding
)
2839 if (sdata
->crypto_tx_tailroom_needed_cnt
)
2840 tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
2842 fwd_skb
= skb_copy_expand(skb
, local
->tx_headroom
+
2843 sdata
->encrypt_headroom
,
2844 tailroom
, GFP_ATOMIC
);
2848 fwd_hdr
= (struct ieee80211_hdr
*) fwd_skb
->data
;
2849 fwd_hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_RETRY
);
2850 info
= IEEE80211_SKB_CB(fwd_skb
);
2851 memset(info
, 0, sizeof(*info
));
2852 info
->control
.flags
|= IEEE80211_TX_INTCFL_NEED_TXPROCESSING
;
2853 info
->control
.vif
= &rx
->sdata
->vif
;
2854 info
->control
.jiffies
= jiffies
;
2855 if (is_multicast_ether_addr(fwd_hdr
->addr1
)) {
2856 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_mcast
);
2857 memcpy(fwd_hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2858 /* update power mode indication when forwarding */
2859 ieee80211_mps_set_frame_flags(sdata
, NULL
, fwd_hdr
);
2860 } else if (!mesh_nexthop_lookup(sdata
, fwd_skb
)) {
2861 /* mesh power mode flags updated in mesh_nexthop_lookup */
2862 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_unicast
);
2864 /* unable to resolve next hop */
2865 mesh_path_error_tx(sdata
, ifmsh
->mshcfg
.element_ttl
,
2867 WLAN_REASON_MESH_PATH_NOFORWARD
,
2869 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_no_route
);
2871 return RX_DROP_MONITOR
;
2874 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_frames
);
2875 ieee80211_add_pending_skb(local
, fwd_skb
);
2877 if (is_multicast_ether_addr(hdr
->addr1
))
2879 return RX_DROP_MONITOR
;
2883 static ieee80211_rx_result debug_noinline
2884 ieee80211_rx_h_data(struct ieee80211_rx_data
*rx
)
2886 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2887 struct ieee80211_local
*local
= rx
->local
;
2888 struct net_device
*dev
= sdata
->dev
;
2889 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2890 __le16 fc
= hdr
->frame_control
;
2894 if (unlikely(!ieee80211_is_data(hdr
->frame_control
)))
2897 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
2898 return RX_DROP_MONITOR
;
2901 * Send unexpected-4addr-frame event to hostapd. For older versions,
2902 * also drop the frame to cooked monitor interfaces.
2904 if (ieee80211_has_a4(hdr
->frame_control
) &&
2905 sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2907 !test_and_set_sta_flag(rx
->sta
, WLAN_STA_4ADDR_EVENT
))
2908 cfg80211_rx_unexpected_4addr_frame(
2909 rx
->sdata
->dev
, rx
->sta
->sta
.addr
, GFP_ATOMIC
);
2910 return RX_DROP_MONITOR
;
2913 err
= __ieee80211_data_to_8023(rx
, &port_control
);
2915 return RX_DROP_UNUSABLE
;
2917 if (!ieee80211_frame_allowed(rx
, fc
))
2918 return RX_DROP_MONITOR
;
2920 /* directly handle TDLS channel switch requests/responses */
2921 if (unlikely(((struct ethhdr
*)rx
->skb
->data
)->h_proto
==
2922 cpu_to_be16(ETH_P_TDLS
))) {
2923 struct ieee80211_tdls_data
*tf
= (void *)rx
->skb
->data
;
2925 if (pskb_may_pull(rx
->skb
,
2926 offsetof(struct ieee80211_tdls_data
, u
)) &&
2927 tf
->payload_type
== WLAN_TDLS_SNAP_RFTYPE
&&
2928 tf
->category
== WLAN_CATEGORY_TDLS
&&
2929 (tf
->action_code
== WLAN_TDLS_CHANNEL_SWITCH_REQUEST
||
2930 tf
->action_code
== WLAN_TDLS_CHANNEL_SWITCH_RESPONSE
)) {
2931 skb_queue_tail(&local
->skb_queue_tdls_chsw
, rx
->skb
);
2932 schedule_work(&local
->tdls_chsw_work
);
2934 rx
->sta
->rx_stats
.packets
++;
2940 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
2941 unlikely(port_control
) && sdata
->bss
) {
2942 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
2950 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
) &&
2951 local
->ps_sdata
&& local
->hw
.conf
.dynamic_ps_timeout
> 0 &&
2952 !is_multicast_ether_addr(
2953 ((struct ethhdr
*)rx
->skb
->data
)->h_dest
) &&
2954 (!local
->scanning
&&
2955 !test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
)))
2956 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
2957 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
2959 ieee80211_deliver_skb(rx
);
2964 static ieee80211_rx_result debug_noinline
2965 ieee80211_rx_h_ctrl(struct ieee80211_rx_data
*rx
, struct sk_buff_head
*frames
)
2967 struct sk_buff
*skb
= rx
->skb
;
2968 struct ieee80211_bar
*bar
= (struct ieee80211_bar
*)skb
->data
;
2969 struct tid_ampdu_rx
*tid_agg_rx
;
2973 if (likely(!ieee80211_is_ctl(bar
->frame_control
)))
2976 if (ieee80211_is_back_req(bar
->frame_control
)) {
2978 __le16 control
, start_seq_num
;
2979 } __packed bar_data
;
2980 struct ieee80211_event event
= {
2981 .type
= BAR_RX_EVENT
,
2985 return RX_DROP_MONITOR
;
2987 if (skb_copy_bits(skb
, offsetof(struct ieee80211_bar
, control
),
2988 &bar_data
, sizeof(bar_data
)))
2989 return RX_DROP_MONITOR
;
2991 tid
= le16_to_cpu(bar_data
.control
) >> 12;
2993 if (!test_bit(tid
, rx
->sta
->ampdu_mlme
.agg_session_valid
) &&
2994 !test_and_set_bit(tid
, rx
->sta
->ampdu_mlme
.unexpected_agg
))
2995 ieee80211_send_delba(rx
->sdata
, rx
->sta
->sta
.addr
, tid
,
2996 WLAN_BACK_RECIPIENT
,
2997 WLAN_REASON_QSTA_REQUIRE_SETUP
);
2999 tid_agg_rx
= rcu_dereference(rx
->sta
->ampdu_mlme
.tid_rx
[tid
]);
3001 return RX_DROP_MONITOR
;
3003 start_seq_num
= le16_to_cpu(bar_data
.start_seq_num
) >> 4;
3004 event
.u
.ba
.tid
= tid
;
3005 event
.u
.ba
.ssn
= start_seq_num
;
3006 event
.u
.ba
.sta
= &rx
->sta
->sta
;
3008 /* reset session timer */
3009 if (tid_agg_rx
->timeout
)
3010 mod_timer(&tid_agg_rx
->session_timer
,
3011 TU_TO_EXP_TIME(tid_agg_rx
->timeout
));
3013 spin_lock(&tid_agg_rx
->reorder_lock
);
3014 /* release stored frames up to start of BAR */
3015 ieee80211_release_reorder_frames(rx
->sdata
, tid_agg_rx
,
3016 start_seq_num
, frames
);
3017 spin_unlock(&tid_agg_rx
->reorder_lock
);
3019 drv_event_callback(rx
->local
, rx
->sdata
, &event
);
3026 * After this point, we only want management frames,
3027 * so we can drop all remaining control frames to
3028 * cooked monitor interfaces.
3030 return RX_DROP_MONITOR
;
3033 static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data
*sdata
,
3034 struct ieee80211_mgmt
*mgmt
,
3037 struct ieee80211_local
*local
= sdata
->local
;
3038 struct sk_buff
*skb
;
3039 struct ieee80211_mgmt
*resp
;
3041 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
)) {
3042 /* Not to own unicast address */
3046 if (!ether_addr_equal(mgmt
->sa
, sdata
->u
.mgd
.bssid
) ||
3047 !ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
)) {
3048 /* Not from the current AP or not associated yet. */
3052 if (len
< 24 + 1 + sizeof(resp
->u
.action
.u
.sa_query
)) {
3053 /* Too short SA Query request frame */
3057 skb
= dev_alloc_skb(sizeof(*resp
) + local
->hw
.extra_tx_headroom
);
3061 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
3062 resp
= skb_put_zero(skb
, 24);
3063 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
3064 memcpy(resp
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
3065 memcpy(resp
->bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
3066 resp
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
3067 IEEE80211_STYPE_ACTION
);
3068 skb_put(skb
, 1 + sizeof(resp
->u
.action
.u
.sa_query
));
3069 resp
->u
.action
.category
= WLAN_CATEGORY_SA_QUERY
;
3070 resp
->u
.action
.u
.sa_query
.action
= WLAN_ACTION_SA_QUERY_RESPONSE
;
3071 memcpy(resp
->u
.action
.u
.sa_query
.trans_id
,
3072 mgmt
->u
.action
.u
.sa_query
.trans_id
,
3073 WLAN_SA_QUERY_TR_ID_LEN
);
3075 ieee80211_tx_skb(sdata
, skb
);
3078 static ieee80211_rx_result debug_noinline
3079 ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data
*rx
)
3081 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3082 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3084 if (ieee80211_is_s1g_beacon(mgmt
->frame_control
))
3088 * From here on, look only at management frames.
3089 * Data and control frames are already handled,
3090 * and unknown (reserved) frames are useless.
3092 if (rx
->skb
->len
< 24)
3093 return RX_DROP_MONITOR
;
3095 if (!ieee80211_is_mgmt(mgmt
->frame_control
))
3096 return RX_DROP_MONITOR
;
3098 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
3099 ieee80211_is_beacon(mgmt
->frame_control
) &&
3100 !(rx
->flags
& IEEE80211_RX_BEACON_REPORTED
)) {
3103 if (ieee80211_hw_check(&rx
->local
->hw
, SIGNAL_DBM
) &&
3104 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
))
3105 sig
= status
->signal
;
3107 cfg80211_report_obss_beacon_khz(rx
->local
->hw
.wiphy
,
3108 rx
->skb
->data
, rx
->skb
->len
,
3109 ieee80211_rx_status_to_khz(status
),
3111 rx
->flags
|= IEEE80211_RX_BEACON_REPORTED
;
3114 if (ieee80211_drop_unencrypted_mgmt(rx
))
3115 return RX_DROP_UNUSABLE
;
3120 static ieee80211_rx_result debug_noinline
3121 ieee80211_rx_h_action(struct ieee80211_rx_data
*rx
)
3123 struct ieee80211_local
*local
= rx
->local
;
3124 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3125 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3126 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3127 int len
= rx
->skb
->len
;
3129 if (!ieee80211_is_action(mgmt
->frame_control
))
3132 /* drop too small frames */
3133 if (len
< IEEE80211_MIN_ACTION_SIZE
)
3134 return RX_DROP_UNUSABLE
;
3136 if (!rx
->sta
&& mgmt
->u
.action
.category
!= WLAN_CATEGORY_PUBLIC
&&
3137 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SELF_PROTECTED
&&
3138 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SPECTRUM_MGMT
)
3139 return RX_DROP_UNUSABLE
;
3141 switch (mgmt
->u
.action
.category
) {
3142 case WLAN_CATEGORY_HT
:
3143 /* reject HT action frames from stations not supporting HT */
3144 if (!rx
->sta
->sta
.ht_cap
.ht_supported
)
3147 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3148 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3149 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3150 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3151 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3154 /* verify action & smps_control/chanwidth are present */
3155 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
3158 switch (mgmt
->u
.action
.u
.ht_smps
.action
) {
3159 case WLAN_HT_ACTION_SMPS
: {
3160 struct ieee80211_supported_band
*sband
;
3161 enum ieee80211_smps_mode smps_mode
;
3162 struct sta_opmode_info sta_opmode
= {};
3164 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3165 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
)
3168 /* convert to HT capability */
3169 switch (mgmt
->u
.action
.u
.ht_smps
.smps_control
) {
3170 case WLAN_HT_SMPS_CONTROL_DISABLED
:
3171 smps_mode
= IEEE80211_SMPS_OFF
;
3173 case WLAN_HT_SMPS_CONTROL_STATIC
:
3174 smps_mode
= IEEE80211_SMPS_STATIC
;
3176 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
3177 smps_mode
= IEEE80211_SMPS_DYNAMIC
;
3183 /* if no change do nothing */
3184 if (rx
->sta
->sta
.smps_mode
== smps_mode
)
3186 rx
->sta
->sta
.smps_mode
= smps_mode
;
3187 sta_opmode
.smps_mode
=
3188 ieee80211_smps_mode_to_smps_mode(smps_mode
);
3189 sta_opmode
.changed
= STA_OPMODE_SMPS_MODE_CHANGED
;
3191 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3193 rate_control_rate_update(local
, sband
, rx
->sta
,
3194 IEEE80211_RC_SMPS_CHANGED
);
3195 cfg80211_sta_opmode_change_notify(sdata
->dev
,
3201 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH
: {
3202 struct ieee80211_supported_band
*sband
;
3203 u8 chanwidth
= mgmt
->u
.action
.u
.ht_notify_cw
.chanwidth
;
3204 enum ieee80211_sta_rx_bandwidth max_bw
, new_bw
;
3205 struct sta_opmode_info sta_opmode
= {};
3207 /* If it doesn't support 40 MHz it can't change ... */
3208 if (!(rx
->sta
->sta
.ht_cap
.cap
&
3209 IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
3212 if (chanwidth
== IEEE80211_HT_CHANWIDTH_20MHZ
)
3213 max_bw
= IEEE80211_STA_RX_BW_20
;
3215 max_bw
= ieee80211_sta_cap_rx_bw(rx
->sta
);
3217 /* set cur_max_bandwidth and recalc sta bw */
3218 rx
->sta
->cur_max_bandwidth
= max_bw
;
3219 new_bw
= ieee80211_sta_cur_vht_bw(rx
->sta
);
3221 if (rx
->sta
->sta
.bandwidth
== new_bw
)
3224 rx
->sta
->sta
.bandwidth
= new_bw
;
3225 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3227 ieee80211_sta_rx_bw_to_chan_width(rx
->sta
);
3228 sta_opmode
.changed
= STA_OPMODE_MAX_BW_CHANGED
;
3230 rate_control_rate_update(local
, sband
, rx
->sta
,
3231 IEEE80211_RC_BW_CHANGED
);
3232 cfg80211_sta_opmode_change_notify(sdata
->dev
,
3243 case WLAN_CATEGORY_PUBLIC
:
3244 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3246 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3250 if (!ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
))
3252 if (mgmt
->u
.action
.u
.ext_chan_switch
.action_code
!=
3253 WLAN_PUB_ACTION_EXT_CHANSW_ANN
)
3255 if (len
< offsetof(struct ieee80211_mgmt
,
3256 u
.action
.u
.ext_chan_switch
.variable
))
3259 case WLAN_CATEGORY_VHT
:
3260 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3261 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3262 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3263 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3264 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3267 /* verify action code is present */
3268 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3271 switch (mgmt
->u
.action
.u
.vht_opmode_notif
.action_code
) {
3272 case WLAN_VHT_ACTION_OPMODE_NOTIF
: {
3273 /* verify opmode is present */
3274 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
3278 case WLAN_VHT_ACTION_GROUPID_MGMT
: {
3279 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 25)
3287 case WLAN_CATEGORY_BACK
:
3288 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3289 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3290 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3291 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3292 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3295 /* verify action_code is present */
3296 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3299 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
3300 case WLAN_ACTION_ADDBA_REQ
:
3301 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3302 sizeof(mgmt
->u
.action
.u
.addba_req
)))
3305 case WLAN_ACTION_ADDBA_RESP
:
3306 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3307 sizeof(mgmt
->u
.action
.u
.addba_resp
)))
3310 case WLAN_ACTION_DELBA
:
3311 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3312 sizeof(mgmt
->u
.action
.u
.delba
)))
3320 case WLAN_CATEGORY_SPECTRUM_MGMT
:
3321 /* verify action_code is present */
3322 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3325 switch (mgmt
->u
.action
.u
.measurement
.action_code
) {
3326 case WLAN_ACTION_SPCT_MSR_REQ
:
3327 if (status
->band
!= NL80211_BAND_5GHZ
)
3330 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3331 sizeof(mgmt
->u
.action
.u
.measurement
)))
3334 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3337 ieee80211_process_measurement_req(sdata
, mgmt
, len
);
3339 case WLAN_ACTION_SPCT_CHL_SWITCH
: {
3341 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3342 sizeof(mgmt
->u
.action
.u
.chan_switch
)))
3345 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3346 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3347 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
3350 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
3351 bssid
= sdata
->u
.mgd
.bssid
;
3352 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
3353 bssid
= sdata
->u
.ibss
.bssid
;
3354 else if (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
3359 if (!ether_addr_equal(mgmt
->bssid
, bssid
))
3366 case WLAN_CATEGORY_SELF_PROTECTED
:
3367 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3368 sizeof(mgmt
->u
.action
.u
.self_prot
.action_code
)))
3371 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
3372 case WLAN_SP_MESH_PEERING_OPEN
:
3373 case WLAN_SP_MESH_PEERING_CLOSE
:
3374 case WLAN_SP_MESH_PEERING_CONFIRM
:
3375 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3377 if (sdata
->u
.mesh
.user_mpm
)
3378 /* userspace handles this frame */
3381 case WLAN_SP_MGK_INFORM
:
3382 case WLAN_SP_MGK_ACK
:
3383 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3388 case WLAN_CATEGORY_MESH_ACTION
:
3389 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3390 sizeof(mgmt
->u
.action
.u
.mesh_action
.action_code
)))
3393 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3395 if (mesh_action_is_path_sel(mgmt
) &&
3396 !mesh_path_sel_is_hwmp(sdata
))
3404 status
->rx_flags
|= IEEE80211_RX_MALFORMED_ACTION_FRM
;
3405 /* will return in the next handlers */
3410 rx
->sta
->rx_stats
.packets
++;
3411 dev_kfree_skb(rx
->skb
);
3415 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
3416 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3418 rx
->sta
->rx_stats
.packets
++;
3422 static ieee80211_rx_result debug_noinline
3423 ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data
*rx
)
3425 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3428 /* skip known-bad action frames and return them in the next handler */
3429 if (status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
)
3433 * Getting here means the kernel doesn't know how to handle
3434 * it, but maybe userspace does ... include returned frames
3435 * so userspace can register for those to know whether ones
3436 * it transmitted were processed or returned.
3439 if (ieee80211_hw_check(&rx
->local
->hw
, SIGNAL_DBM
) &&
3440 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
))
3441 sig
= status
->signal
;
3443 if (cfg80211_rx_mgmt_khz(&rx
->sdata
->wdev
,
3444 ieee80211_rx_status_to_khz(status
), sig
,
3445 rx
->skb
->data
, rx
->skb
->len
, 0)) {
3447 rx
->sta
->rx_stats
.packets
++;
3448 dev_kfree_skb(rx
->skb
);
3455 static ieee80211_rx_result debug_noinline
3456 ieee80211_rx_h_action_post_userspace(struct ieee80211_rx_data
*rx
)
3458 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3459 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3460 int len
= rx
->skb
->len
;
3462 if (!ieee80211_is_action(mgmt
->frame_control
))
3465 switch (mgmt
->u
.action
.category
) {
3466 case WLAN_CATEGORY_SA_QUERY
:
3467 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3468 sizeof(mgmt
->u
.action
.u
.sa_query
)))
3471 switch (mgmt
->u
.action
.u
.sa_query
.action
) {
3472 case WLAN_ACTION_SA_QUERY_REQUEST
:
3473 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3475 ieee80211_process_sa_query_req(sdata
, mgmt
, len
);
3485 rx
->sta
->rx_stats
.packets
++;
3486 dev_kfree_skb(rx
->skb
);
3490 static ieee80211_rx_result debug_noinline
3491 ieee80211_rx_h_action_return(struct ieee80211_rx_data
*rx
)
3493 struct ieee80211_local
*local
= rx
->local
;
3494 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3495 struct sk_buff
*nskb
;
3496 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3497 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3499 if (!ieee80211_is_action(mgmt
->frame_control
))
3503 * For AP mode, hostapd is responsible for handling any action
3504 * frames that we didn't handle, including returning unknown
3505 * ones. For all other modes we will return them to the sender,
3506 * setting the 0x80 bit in the action category, as required by
3507 * 802.11-2012 9.24.4.
3508 * Newer versions of hostapd shall also use the management frame
3509 * registration mechanisms, but older ones still use cooked
3510 * monitor interfaces so push all frames there.
3512 if (!(status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
) &&
3513 (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
3514 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
3515 return RX_DROP_MONITOR
;
3517 if (is_multicast_ether_addr(mgmt
->da
))
3518 return RX_DROP_MONITOR
;
3520 /* do not return rejected action frames */
3521 if (mgmt
->u
.action
.category
& 0x80)
3522 return RX_DROP_UNUSABLE
;
3524 nskb
= skb_copy_expand(rx
->skb
, local
->hw
.extra_tx_headroom
, 0,
3527 struct ieee80211_mgmt
*nmgmt
= (void *)nskb
->data
;
3529 nmgmt
->u
.action
.category
|= 0x80;
3530 memcpy(nmgmt
->da
, nmgmt
->sa
, ETH_ALEN
);
3531 memcpy(nmgmt
->sa
, rx
->sdata
->vif
.addr
, ETH_ALEN
);
3533 memset(nskb
->cb
, 0, sizeof(nskb
->cb
));
3535 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
3536 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(nskb
);
3538 info
->flags
= IEEE80211_TX_CTL_TX_OFFCHAN
|
3539 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
|
3540 IEEE80211_TX_CTL_NO_CCK_RATE
;
3541 if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
3543 local
->hw
.offchannel_tx_hw_queue
;
3546 __ieee80211_tx_skb_tid_band(rx
->sdata
, nskb
, 7,
3549 dev_kfree_skb(rx
->skb
);
3553 static ieee80211_rx_result debug_noinline
3554 ieee80211_rx_h_ext(struct ieee80211_rx_data
*rx
)
3556 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3557 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
3559 if (!ieee80211_is_ext(hdr
->frame_control
))
3562 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3563 return RX_DROP_MONITOR
;
3565 /* for now only beacons are ext, so queue them */
3566 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
3567 ieee80211_queue_work(&rx
->local
->hw
, &sdata
->work
);
3569 rx
->sta
->rx_stats
.packets
++;
3574 static ieee80211_rx_result debug_noinline
3575 ieee80211_rx_h_mgmt(struct ieee80211_rx_data
*rx
)
3577 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3578 struct ieee80211_mgmt
*mgmt
= (void *)rx
->skb
->data
;
3581 stype
= mgmt
->frame_control
& cpu_to_le16(IEEE80211_FCTL_STYPE
);
3583 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
3584 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3585 sdata
->vif
.type
!= NL80211_IFTYPE_OCB
&&
3586 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3587 return RX_DROP_MONITOR
;
3590 case cpu_to_le16(IEEE80211_STYPE_AUTH
):
3591 case cpu_to_le16(IEEE80211_STYPE_BEACON
):
3592 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP
):
3593 /* process for all: mesh, mlme, ibss */
3595 case cpu_to_le16(IEEE80211_STYPE_DEAUTH
):
3596 if (is_multicast_ether_addr(mgmt
->da
) &&
3597 !is_broadcast_ether_addr(mgmt
->da
))
3598 return RX_DROP_MONITOR
;
3600 /* process only for station/IBSS */
3601 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3602 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3603 return RX_DROP_MONITOR
;
3605 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP
):
3606 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP
):
3607 case cpu_to_le16(IEEE80211_STYPE_DISASSOC
):
3608 if (is_multicast_ether_addr(mgmt
->da
) &&
3609 !is_broadcast_ether_addr(mgmt
->da
))
3610 return RX_DROP_MONITOR
;
3612 /* process only for station */
3613 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3614 return RX_DROP_MONITOR
;
3616 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
):
3617 /* process only for ibss and mesh */
3618 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3619 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
3620 return RX_DROP_MONITOR
;
3623 return RX_DROP_MONITOR
;
3626 /* queue up frame and kick off work to process it */
3627 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
3628 ieee80211_queue_work(&rx
->local
->hw
, &sdata
->work
);
3630 rx
->sta
->rx_stats
.packets
++;
3635 static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data
*rx
,
3636 struct ieee80211_rate
*rate
)
3638 struct ieee80211_sub_if_data
*sdata
;
3639 struct ieee80211_local
*local
= rx
->local
;
3640 struct sk_buff
*skb
= rx
->skb
, *skb2
;
3641 struct net_device
*prev_dev
= NULL
;
3642 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3643 int needed_headroom
;
3646 * If cooked monitor has been processed already, then
3647 * don't do it again. If not, set the flag.
3649 if (rx
->flags
& IEEE80211_RX_CMNTR
)
3651 rx
->flags
|= IEEE80211_RX_CMNTR
;
3653 /* If there are no cooked monitor interfaces, just free the SKB */
3654 if (!local
->cooked_mntrs
)
3657 /* vendor data is long removed here */
3658 status
->flag
&= ~RX_FLAG_RADIOTAP_VENDOR_DATA
;
3659 /* room for the radiotap header based on driver features */
3660 needed_headroom
= ieee80211_rx_radiotap_hdrlen(local
, status
, skb
);
3662 if (skb_headroom(skb
) < needed_headroom
&&
3663 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
))
3666 /* prepend radiotap information */
3667 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, needed_headroom
,
3670 skb_reset_mac_header(skb
);
3671 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3672 skb
->pkt_type
= PACKET_OTHERHOST
;
3673 skb
->protocol
= htons(ETH_P_802_2
);
3675 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3676 if (!ieee80211_sdata_running(sdata
))
3679 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
||
3680 !(sdata
->u
.mntr
.flags
& MONITOR_FLAG_COOK_FRAMES
))
3684 skb2
= skb_clone(skb
, GFP_ATOMIC
);
3686 skb2
->dev
= prev_dev
;
3687 netif_receive_skb(skb2
);
3691 prev_dev
= sdata
->dev
;
3692 dev_sw_netstats_rx_add(sdata
->dev
, skb
->len
);
3696 skb
->dev
= prev_dev
;
3697 netif_receive_skb(skb
);
3705 static void ieee80211_rx_handlers_result(struct ieee80211_rx_data
*rx
,
3706 ieee80211_rx_result res
)
3709 case RX_DROP_MONITOR
:
3710 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
3712 rx
->sta
->rx_stats
.dropped
++;
3715 struct ieee80211_rate
*rate
= NULL
;
3716 struct ieee80211_supported_band
*sband
;
3717 struct ieee80211_rx_status
*status
;
3719 status
= IEEE80211_SKB_RXCB((rx
->skb
));
3721 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3722 if (status
->encoding
== RX_ENC_LEGACY
)
3723 rate
= &sband
->bitrates
[status
->rate_idx
];
3725 ieee80211_rx_cooked_monitor(rx
, rate
);
3728 case RX_DROP_UNUSABLE
:
3729 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
3731 rx
->sta
->rx_stats
.dropped
++;
3732 dev_kfree_skb(rx
->skb
);
3735 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_queued
);
3740 static void ieee80211_rx_handlers(struct ieee80211_rx_data
*rx
,
3741 struct sk_buff_head
*frames
)
3743 ieee80211_rx_result res
= RX_DROP_MONITOR
;
3744 struct sk_buff
*skb
;
3746 #define CALL_RXH(rxh) \
3749 if (res != RX_CONTINUE) \
3753 /* Lock here to avoid hitting all of the data used in the RX
3754 * path (e.g. key data, station data, ...) concurrently when
3755 * a frame is released from the reorder buffer due to timeout
3756 * from the timer, potentially concurrently with RX from the
3759 spin_lock_bh(&rx
->local
->rx_path_lock
);
3761 while ((skb
= __skb_dequeue(frames
))) {
3763 * all the other fields are valid across frames
3764 * that belong to an aMPDU since they are on the
3765 * same TID from the same station
3769 CALL_RXH(ieee80211_rx_h_check_more_data
);
3770 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll
);
3771 CALL_RXH(ieee80211_rx_h_sta_process
);
3772 CALL_RXH(ieee80211_rx_h_decrypt
);
3773 CALL_RXH(ieee80211_rx_h_defragment
);
3774 CALL_RXH(ieee80211_rx_h_michael_mic_verify
);
3775 /* must be after MMIC verify so header is counted in MPDU mic */
3776 #ifdef CONFIG_MAC80211_MESH
3777 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
3778 CALL_RXH(ieee80211_rx_h_mesh_fwding
);
3780 CALL_RXH(ieee80211_rx_h_amsdu
);
3781 CALL_RXH(ieee80211_rx_h_data
);
3783 /* special treatment -- needs the queue */
3784 res
= ieee80211_rx_h_ctrl(rx
, frames
);
3785 if (res
!= RX_CONTINUE
)
3788 CALL_RXH(ieee80211_rx_h_mgmt_check
);
3789 CALL_RXH(ieee80211_rx_h_action
);
3790 CALL_RXH(ieee80211_rx_h_userspace_mgmt
);
3791 CALL_RXH(ieee80211_rx_h_action_post_userspace
);
3792 CALL_RXH(ieee80211_rx_h_action_return
);
3793 CALL_RXH(ieee80211_rx_h_ext
);
3794 CALL_RXH(ieee80211_rx_h_mgmt
);
3797 ieee80211_rx_handlers_result(rx
, res
);
3802 spin_unlock_bh(&rx
->local
->rx_path_lock
);
3805 static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data
*rx
)
3807 struct sk_buff_head reorder_release
;
3808 ieee80211_rx_result res
= RX_DROP_MONITOR
;
3810 __skb_queue_head_init(&reorder_release
);
3812 #define CALL_RXH(rxh) \
3815 if (res != RX_CONTINUE) \
3819 CALL_RXH(ieee80211_rx_h_check_dup
);
3820 CALL_RXH(ieee80211_rx_h_check
);
3822 ieee80211_rx_reorder_ampdu(rx
, &reorder_release
);
3824 ieee80211_rx_handlers(rx
, &reorder_release
);
3828 ieee80211_rx_handlers_result(rx
, res
);
3834 * This function makes calls into the RX path, therefore
3835 * it has to be invoked under RCU read lock.
3837 void ieee80211_release_reorder_timeout(struct sta_info
*sta
, int tid
)
3839 struct sk_buff_head frames
;
3840 struct ieee80211_rx_data rx
= {
3842 .sdata
= sta
->sdata
,
3843 .local
= sta
->local
,
3844 /* This is OK -- must be QoS data frame */
3845 .security_idx
= tid
,
3848 struct tid_ampdu_rx
*tid_agg_rx
;
3850 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
3854 __skb_queue_head_init(&frames
);
3856 spin_lock(&tid_agg_rx
->reorder_lock
);
3857 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
3858 spin_unlock(&tid_agg_rx
->reorder_lock
);
3860 if (!skb_queue_empty(&frames
)) {
3861 struct ieee80211_event event
= {
3862 .type
= BA_FRAME_TIMEOUT
,
3864 .u
.ba
.sta
= &sta
->sta
,
3866 drv_event_callback(rx
.local
, rx
.sdata
, &event
);
3869 ieee80211_rx_handlers(&rx
, &frames
);
3872 void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta
*pubsta
, u8 tid
,
3873 u16 ssn
, u64 filtered
,
3876 struct sta_info
*sta
;
3877 struct tid_ampdu_rx
*tid_agg_rx
;
3878 struct sk_buff_head frames
;
3879 struct ieee80211_rx_data rx
= {
3880 /* This is OK -- must be QoS data frame */
3881 .security_idx
= tid
,
3886 if (WARN_ON(!pubsta
|| tid
>= IEEE80211_NUM_TIDS
))
3889 __skb_queue_head_init(&frames
);
3891 sta
= container_of(pubsta
, struct sta_info
, sta
);
3894 rx
.sdata
= sta
->sdata
;
3895 rx
.local
= sta
->local
;
3898 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
3902 spin_lock_bh(&tid_agg_rx
->reorder_lock
);
3904 if (received_mpdus
>= IEEE80211_SN_MODULO
>> 1) {
3907 /* release all frames in the reorder buffer */
3908 release
= (tid_agg_rx
->head_seq_num
+ tid_agg_rx
->buf_size
) %
3909 IEEE80211_SN_MODULO
;
3910 ieee80211_release_reorder_frames(sta
->sdata
, tid_agg_rx
,
3912 /* update ssn to match received ssn */
3913 tid_agg_rx
->head_seq_num
= ssn
;
3915 ieee80211_release_reorder_frames(sta
->sdata
, tid_agg_rx
, ssn
,
3919 /* handle the case that received ssn is behind the mac ssn.
3920 * it can be tid_agg_rx->buf_size behind and still be valid */
3921 diff
= (tid_agg_rx
->head_seq_num
- ssn
) & IEEE80211_SN_MASK
;
3922 if (diff
>= tid_agg_rx
->buf_size
) {
3923 tid_agg_rx
->reorder_buf_filtered
= 0;
3926 filtered
= filtered
>> diff
;
3930 for (i
= 0; i
< tid_agg_rx
->buf_size
; i
++) {
3931 int index
= (ssn
+ i
) % tid_agg_rx
->buf_size
;
3933 tid_agg_rx
->reorder_buf_filtered
&= ~BIT_ULL(index
);
3934 if (filtered
& BIT_ULL(i
))
3935 tid_agg_rx
->reorder_buf_filtered
|= BIT_ULL(index
);
3938 /* now process also frames that the filter marking released */
3939 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
3942 spin_unlock_bh(&tid_agg_rx
->reorder_lock
);
3944 ieee80211_rx_handlers(&rx
, &frames
);
3949 EXPORT_SYMBOL(ieee80211_mark_rx_ba_filtered_frames
);
3951 /* main receive path */
3953 static bool ieee80211_accept_frame(struct ieee80211_rx_data
*rx
)
3955 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3956 struct sk_buff
*skb
= rx
->skb
;
3957 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
3958 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3959 u8
*bssid
= ieee80211_get_bssid(hdr
, skb
->len
, sdata
->vif
.type
);
3960 bool multicast
= is_multicast_ether_addr(hdr
->addr1
) ||
3961 ieee80211_is_s1g_beacon(hdr
->frame_control
);
3963 switch (sdata
->vif
.type
) {
3964 case NL80211_IFTYPE_STATION
:
3965 if (!bssid
&& !sdata
->u
.mgd
.use_4addr
)
3967 if (ieee80211_is_robust_mgmt_frame(skb
) && !rx
->sta
)
3971 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
3972 case NL80211_IFTYPE_ADHOC
:
3975 if (ether_addr_equal(sdata
->vif
.addr
, hdr
->addr2
) ||
3976 ether_addr_equal(sdata
->u
.ibss
.bssid
, hdr
->addr2
))
3978 if (ieee80211_is_beacon(hdr
->frame_control
))
3980 if (!ieee80211_bssid_match(bssid
, sdata
->u
.ibss
.bssid
))
3983 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
3987 if (status
->encoding
!= RX_ENC_LEGACY
)
3988 rate_idx
= 0; /* TODO: HT/VHT rates */
3990 rate_idx
= status
->rate_idx
;
3991 ieee80211_ibss_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
3995 case NL80211_IFTYPE_OCB
:
3998 if (!ieee80211_is_data_present(hdr
->frame_control
))
4000 if (!is_broadcast_ether_addr(bssid
))
4003 !ether_addr_equal(sdata
->dev
->dev_addr
, hdr
->addr1
))
4007 if (status
->encoding
!= RX_ENC_LEGACY
)
4008 rate_idx
= 0; /* TODO: HT rates */
4010 rate_idx
= status
->rate_idx
;
4011 ieee80211_ocb_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
4015 case NL80211_IFTYPE_MESH_POINT
:
4016 if (ether_addr_equal(sdata
->vif
.addr
, hdr
->addr2
))
4020 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
4021 case NL80211_IFTYPE_AP_VLAN
:
4022 case NL80211_IFTYPE_AP
:
4024 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
4026 if (!ieee80211_bssid_match(bssid
, sdata
->vif
.addr
)) {
4028 * Accept public action frames even when the
4029 * BSSID doesn't match, this is used for P2P
4030 * and location updates. Note that mac80211
4031 * itself never looks at these frames.
4034 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
4036 if (ieee80211_is_public_action(hdr
, skb
->len
))
4038 return ieee80211_is_beacon(hdr
->frame_control
);
4041 if (!ieee80211_has_tods(hdr
->frame_control
)) {
4042 /* ignore data frames to TDLS-peers */
4043 if (ieee80211_is_data(hdr
->frame_control
))
4045 /* ignore action frames to TDLS-peers */
4046 if (ieee80211_is_action(hdr
->frame_control
) &&
4047 !is_broadcast_ether_addr(bssid
) &&
4048 !ether_addr_equal(bssid
, hdr
->addr1
))
4053 * 802.11-2016 Table 9-26 says that for data frames, A1 must be
4054 * the BSSID - we've checked that already but may have accepted
4055 * the wildcard (ff:ff:ff:ff:ff:ff).
4058 * The BSSID of the Data frame is determined as follows:
4059 * a) If the STA is contained within an AP or is associated
4060 * with an AP, the BSSID is the address currently in use
4061 * by the STA contained in the AP.
4063 * So we should not accept data frames with an address that's
4066 * Accepting it also opens a security problem because stations
4067 * could encrypt it with the GTK and inject traffic that way.
4069 if (ieee80211_is_data(hdr
->frame_control
) && multicast
)
4073 case NL80211_IFTYPE_P2P_DEVICE
:
4074 return ieee80211_is_public_action(hdr
, skb
->len
) ||
4075 ieee80211_is_probe_req(hdr
->frame_control
) ||
4076 ieee80211_is_probe_resp(hdr
->frame_control
) ||
4077 ieee80211_is_beacon(hdr
->frame_control
);
4078 case NL80211_IFTYPE_NAN
:
4079 /* Currently no frames on NAN interface are allowed */
4089 void ieee80211_check_fast_rx(struct sta_info
*sta
)
4091 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
4092 struct ieee80211_local
*local
= sdata
->local
;
4093 struct ieee80211_key
*key
;
4094 struct ieee80211_fast_rx fastrx
= {
4096 .vif_type
= sdata
->vif
.type
,
4097 .control_port_protocol
= sdata
->control_port_protocol
,
4098 }, *old
, *new = NULL
;
4099 bool set_offload
= false;
4100 bool assign
= false;
4103 /* use sparse to check that we don't return without updating */
4104 __acquire(check_fast_rx
);
4106 BUILD_BUG_ON(sizeof(fastrx
.rfc1042_hdr
) != sizeof(rfc1042_header
));
4107 BUILD_BUG_ON(sizeof(fastrx
.rfc1042_hdr
) != ETH_ALEN
);
4108 ether_addr_copy(fastrx
.rfc1042_hdr
, rfc1042_header
);
4109 ether_addr_copy(fastrx
.vif_addr
, sdata
->vif
.addr
);
4111 fastrx
.uses_rss
= ieee80211_hw_check(&local
->hw
, USES_RSS
);
4113 /* fast-rx doesn't do reordering */
4114 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
) &&
4115 !ieee80211_hw_check(&local
->hw
, SUPPORTS_REORDERING_BUFFER
))
4118 switch (sdata
->vif
.type
) {
4119 case NL80211_IFTYPE_STATION
:
4120 if (sta
->sta
.tdls
) {
4121 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
4122 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
4123 fastrx
.expected_ds_bits
= 0;
4125 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
4126 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4127 fastrx
.expected_ds_bits
=
4128 cpu_to_le16(IEEE80211_FCTL_FROMDS
);
4131 if (sdata
->u
.mgd
.use_4addr
&& !sta
->sta
.tdls
) {
4132 fastrx
.expected_ds_bits
|=
4133 cpu_to_le16(IEEE80211_FCTL_TODS
);
4134 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4135 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
4138 if (!sdata
->u
.mgd
.powersave
)
4141 /* software powersave is a huge mess, avoid all of it */
4142 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
))
4144 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
) &&
4145 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
))
4148 case NL80211_IFTYPE_AP_VLAN
:
4149 case NL80211_IFTYPE_AP
:
4150 /* parallel-rx requires this, at least with calls to
4151 * ieee80211_sta_ps_transition()
4153 if (!ieee80211_hw_check(&local
->hw
, AP_LINK_PS
))
4155 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4156 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
4157 fastrx
.expected_ds_bits
= cpu_to_le16(IEEE80211_FCTL_TODS
);
4159 fastrx
.internal_forward
=
4160 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
4161 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
||
4162 !sdata
->u
.vlan
.sta
);
4164 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
4165 sdata
->u
.vlan
.sta
) {
4166 fastrx
.expected_ds_bits
|=
4167 cpu_to_le16(IEEE80211_FCTL_FROMDS
);
4168 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
4169 fastrx
.internal_forward
= 0;
4177 if (!test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
4181 key
= rcu_dereference(sta
->ptk
[sta
->ptk_idx
]);
4183 key
= rcu_dereference(sdata
->default_unicast_key
);
4185 switch (key
->conf
.cipher
) {
4186 case WLAN_CIPHER_SUITE_TKIP
:
4187 /* we don't want to deal with MMIC in fast-rx */
4189 case WLAN_CIPHER_SUITE_CCMP
:
4190 case WLAN_CIPHER_SUITE_CCMP_256
:
4191 case WLAN_CIPHER_SUITE_GCMP
:
4192 case WLAN_CIPHER_SUITE_GCMP_256
:
4195 /* We also don't want to deal with
4196 * WEP or cipher scheme.
4202 fastrx
.icv_len
= key
->conf
.icv_len
;
4209 __release(check_fast_rx
);
4212 new = kmemdup(&fastrx
, sizeof(fastrx
), GFP_KERNEL
);
4215 (sdata
->vif
.offload_flags
& IEEE80211_OFFLOAD_DECAP_ENABLED
);
4218 set_offload
= !test_and_set_sta_flag(sta
, WLAN_STA_DECAP_OFFLOAD
);
4220 set_offload
= test_and_clear_sta_flag(sta
, WLAN_STA_DECAP_OFFLOAD
);
4223 drv_sta_set_decap_offload(local
, sdata
, &sta
->sta
, assign
);
4225 spin_lock_bh(&sta
->lock
);
4226 old
= rcu_dereference_protected(sta
->fast_rx
, true);
4227 rcu_assign_pointer(sta
->fast_rx
, new);
4228 spin_unlock_bh(&sta
->lock
);
4231 kfree_rcu(old
, rcu_head
);
4234 void ieee80211_clear_fast_rx(struct sta_info
*sta
)
4236 struct ieee80211_fast_rx
*old
;
4238 spin_lock_bh(&sta
->lock
);
4239 old
= rcu_dereference_protected(sta
->fast_rx
, true);
4240 RCU_INIT_POINTER(sta
->fast_rx
, NULL
);
4241 spin_unlock_bh(&sta
->lock
);
4244 kfree_rcu(old
, rcu_head
);
4247 void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data
*sdata
)
4249 struct ieee80211_local
*local
= sdata
->local
;
4250 struct sta_info
*sta
;
4252 lockdep_assert_held(&local
->sta_mtx
);
4254 list_for_each_entry(sta
, &local
->sta_list
, list
) {
4255 if (sdata
!= sta
->sdata
&&
4256 (!sta
->sdata
->bss
|| sta
->sdata
->bss
!= sdata
->bss
))
4258 ieee80211_check_fast_rx(sta
);
4262 void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data
*sdata
)
4264 struct ieee80211_local
*local
= sdata
->local
;
4266 mutex_lock(&local
->sta_mtx
);
4267 __ieee80211_check_fast_rx_iface(sdata
);
4268 mutex_unlock(&local
->sta_mtx
);
4271 static void ieee80211_rx_8023(struct ieee80211_rx_data
*rx
,
4272 struct ieee80211_fast_rx
*fast_rx
,
4275 struct ieee80211_sta_rx_stats
*stats
;
4276 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
4277 struct sta_info
*sta
= rx
->sta
;
4278 struct sk_buff
*skb
= rx
->skb
;
4279 void *sa
= skb
->data
+ ETH_ALEN
;
4280 void *da
= skb
->data
;
4282 stats
= &sta
->rx_stats
;
4283 if (fast_rx
->uses_rss
)
4284 stats
= this_cpu_ptr(sta
->pcpu_rx_stats
);
4286 /* statistics part of ieee80211_rx_h_sta_process() */
4287 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
4288 stats
->last_signal
= status
->signal
;
4289 if (!fast_rx
->uses_rss
)
4290 ewma_signal_add(&sta
->rx_stats_avg
.signal
,
4294 if (status
->chains
) {
4297 stats
->chains
= status
->chains
;
4298 for (i
= 0; i
< ARRAY_SIZE(status
->chain_signal
); i
++) {
4299 int signal
= status
->chain_signal
[i
];
4301 if (!(status
->chains
& BIT(i
)))
4304 stats
->chain_signal_last
[i
] = signal
;
4305 if (!fast_rx
->uses_rss
)
4306 ewma_signal_add(&sta
->rx_stats_avg
.chain_signal
[i
],
4310 /* end of statistics */
4312 stats
->last_rx
= jiffies
;
4313 stats
->last_rate
= sta_stats_encode_rate(status
);
4318 skb
->dev
= fast_rx
->dev
;
4320 dev_sw_netstats_rx_add(fast_rx
->dev
, skb
->len
);
4322 /* The seqno index has the same property as needed
4323 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
4324 * for non-QoS-data frames. Here we know it's a data
4325 * frame, so count MSDUs.
4327 u64_stats_update_begin(&stats
->syncp
);
4328 stats
->msdu
[rx
->seqno_idx
]++;
4329 stats
->bytes
+= orig_len
;
4330 u64_stats_update_end(&stats
->syncp
);
4332 if (fast_rx
->internal_forward
) {
4333 struct sk_buff
*xmit_skb
= NULL
;
4334 if (is_multicast_ether_addr(da
)) {
4335 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
4336 } else if (!ether_addr_equal(da
, sa
) &&
4337 sta_info_get(rx
->sdata
, da
)) {
4344 * Send to wireless media and increase priority by 256
4345 * to keep the received priority instead of
4346 * reclassifying the frame (see cfg80211_classify8021d).
4348 xmit_skb
->priority
+= 256;
4349 xmit_skb
->protocol
= htons(ETH_P_802_3
);
4350 skb_reset_network_header(xmit_skb
);
4351 skb_reset_mac_header(xmit_skb
);
4352 dev_queue_xmit(xmit_skb
);
4359 /* deliver to local stack */
4360 skb
->protocol
= eth_type_trans(skb
, fast_rx
->dev
);
4361 memset(skb
->cb
, 0, sizeof(skb
->cb
));
4363 list_add_tail(&skb
->list
, rx
->list
);
4365 netif_receive_skb(skb
);
4369 static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data
*rx
,
4370 struct ieee80211_fast_rx
*fast_rx
)
4372 struct sk_buff
*skb
= rx
->skb
;
4373 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
4374 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
4375 struct sta_info
*sta
= rx
->sta
;
4376 int orig_len
= skb
->len
;
4377 int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
4378 int snap_offs
= hdrlen
;
4380 u8 snap
[sizeof(rfc1042_header
)];
4382 } *payload
__aligned(2);
4386 } addrs
__aligned(2);
4387 struct ieee80211_sta_rx_stats
*stats
= &sta
->rx_stats
;
4389 /* for parallel-rx, we need to have DUP_VALIDATED, otherwise we write
4390 * to a common data structure; drivers can implement that per queue
4391 * but we don't have that information in mac80211
4393 if (!(status
->flag
& RX_FLAG_DUP_VALIDATED
))
4396 #define FAST_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED)
4398 /* If using encryption, we also need to have:
4399 * - PN_VALIDATED: similar, but the implementation is tricky
4400 * - DECRYPTED: necessary for PN_VALIDATED
4403 (status
->flag
& FAST_RX_CRYPT_FLAGS
) != FAST_RX_CRYPT_FLAGS
)
4406 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
4409 if (unlikely(ieee80211_is_frag(hdr
)))
4412 /* Since our interface address cannot be multicast, this
4413 * implicitly also rejects multicast frames without the
4416 * We shouldn't get any *data* frames not addressed to us
4417 * (AP mode will accept multicast *management* frames), but
4418 * punting here will make it go through the full checks in
4419 * ieee80211_accept_frame().
4421 if (!ether_addr_equal(fast_rx
->vif_addr
, hdr
->addr1
))
4424 if ((hdr
->frame_control
& cpu_to_le16(IEEE80211_FCTL_FROMDS
|
4425 IEEE80211_FCTL_TODS
)) !=
4426 fast_rx
->expected_ds_bits
)
4429 /* assign the key to drop unencrypted frames (later)
4430 * and strip the IV/MIC if necessary
4432 if (fast_rx
->key
&& !(status
->flag
& RX_FLAG_IV_STRIPPED
)) {
4433 /* GCMP header length is the same */
4434 snap_offs
+= IEEE80211_CCMP_HDR_LEN
;
4437 if (!(status
->rx_flags
& IEEE80211_RX_AMSDU
)) {
4438 if (!pskb_may_pull(skb
, snap_offs
+ sizeof(*payload
)))
4441 payload
= (void *)(skb
->data
+ snap_offs
);
4443 if (!ether_addr_equal(payload
->snap
, fast_rx
->rfc1042_hdr
))
4446 /* Don't handle these here since they require special code.
4447 * Accept AARP and IPX even though they should come with a
4448 * bridge-tunnel header - but if we get them this way then
4449 * there's little point in discarding them.
4451 if (unlikely(payload
->proto
== cpu_to_be16(ETH_P_TDLS
) ||
4452 payload
->proto
== fast_rx
->control_port_protocol
))
4456 /* after this point, don't punt to the slowpath! */
4458 if (rx
->key
&& !(status
->flag
& RX_FLAG_MIC_STRIPPED
) &&
4459 pskb_trim(skb
, skb
->len
- fast_rx
->icv_len
))
4462 if (rx
->key
&& !ieee80211_has_protected(hdr
->frame_control
))
4465 if (status
->rx_flags
& IEEE80211_RX_AMSDU
) {
4466 if (__ieee80211_rx_h_amsdu(rx
, snap_offs
- hdrlen
) !=
4473 /* do the header conversion - first grab the addresses */
4474 ether_addr_copy(addrs
.da
, skb
->data
+ fast_rx
->da_offs
);
4475 ether_addr_copy(addrs
.sa
, skb
->data
+ fast_rx
->sa_offs
);
4476 /* remove the SNAP but leave the ethertype */
4477 skb_pull(skb
, snap_offs
+ sizeof(rfc1042_header
));
4478 /* push the addresses in front */
4479 memcpy(skb_push(skb
, sizeof(addrs
)), &addrs
, sizeof(addrs
));
4481 ieee80211_rx_8023(rx
, fast_rx
, orig_len
);
4486 if (fast_rx
->uses_rss
)
4487 stats
= this_cpu_ptr(sta
->pcpu_rx_stats
);
4494 * This function returns whether or not the SKB
4495 * was destined for RX processing or not, which,
4496 * if consume is true, is equivalent to whether
4497 * or not the skb was consumed.
4499 static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data
*rx
,
4500 struct sk_buff
*skb
, bool consume
)
4502 struct ieee80211_local
*local
= rx
->local
;
4503 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
4507 /* See if we can do fast-rx; if we have to copy we already lost,
4508 * so punt in that case. We should never have to deliver a data
4509 * frame to multiple interfaces anyway.
4511 * We skip the ieee80211_accept_frame() call and do the necessary
4512 * checking inside ieee80211_invoke_fast_rx().
4514 if (consume
&& rx
->sta
) {
4515 struct ieee80211_fast_rx
*fast_rx
;
4517 fast_rx
= rcu_dereference(rx
->sta
->fast_rx
);
4518 if (fast_rx
&& ieee80211_invoke_fast_rx(rx
, fast_rx
))
4522 if (!ieee80211_accept_frame(rx
))
4526 skb
= skb_copy(skb
, GFP_ATOMIC
);
4528 if (net_ratelimit())
4529 wiphy_debug(local
->hw
.wiphy
,
4530 "failed to copy skb for %s\n",
4538 ieee80211_invoke_rx_handlers(rx
);
4542 static void __ieee80211_rx_handle_8023(struct ieee80211_hw
*hw
,
4543 struct ieee80211_sta
*pubsta
,
4544 struct sk_buff
*skb
,
4545 struct list_head
*list
)
4547 struct ieee80211_local
*local
= hw_to_local(hw
);
4548 struct ieee80211_fast_rx
*fast_rx
;
4549 struct ieee80211_rx_data rx
;
4551 memset(&rx
, 0, sizeof(rx
));
4556 I802_DEBUG_INC(local
->dot11ReceivedFragmentCount
);
4558 /* drop frame if too short for header */
4559 if (skb
->len
< sizeof(struct ethhdr
))
4565 rx
.sta
= container_of(pubsta
, struct sta_info
, sta
);
4566 rx
.sdata
= rx
.sta
->sdata
;
4568 fast_rx
= rcu_dereference(rx
.sta
->fast_rx
);
4572 ieee80211_rx_8023(&rx
, fast_rx
, skb
->len
);
4580 * This is the actual Rx frames handler. as it belongs to Rx path it must
4581 * be called with rcu_read_lock protection.
4583 static void __ieee80211_rx_handle_packet(struct ieee80211_hw
*hw
,
4584 struct ieee80211_sta
*pubsta
,
4585 struct sk_buff
*skb
,
4586 struct list_head
*list
)
4588 struct ieee80211_local
*local
= hw_to_local(hw
);
4589 struct ieee80211_sub_if_data
*sdata
;
4590 struct ieee80211_hdr
*hdr
;
4592 struct ieee80211_rx_data rx
;
4593 struct ieee80211_sub_if_data
*prev
;
4594 struct rhlist_head
*tmp
;
4597 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
4598 memset(&rx
, 0, sizeof(rx
));
4603 if (ieee80211_is_data(fc
) || ieee80211_is_mgmt(fc
))
4604 I802_DEBUG_INC(local
->dot11ReceivedFragmentCount
);
4606 if (ieee80211_is_mgmt(fc
)) {
4607 /* drop frame if too short for header */
4608 if (skb
->len
< ieee80211_hdrlen(fc
))
4611 err
= skb_linearize(skb
);
4613 err
= !pskb_may_pull(skb
, ieee80211_hdrlen(fc
));
4621 hdr
= (struct ieee80211_hdr
*)skb
->data
;
4622 ieee80211_parse_qos(&rx
);
4623 ieee80211_verify_alignment(&rx
);
4625 if (unlikely(ieee80211_is_probe_resp(hdr
->frame_control
) ||
4626 ieee80211_is_beacon(hdr
->frame_control
) ||
4627 ieee80211_is_s1g_beacon(hdr
->frame_control
)))
4628 ieee80211_scan_rx(local
, skb
);
4630 if (ieee80211_is_data(fc
)) {
4631 struct sta_info
*sta
, *prev_sta
;
4634 rx
.sta
= container_of(pubsta
, struct sta_info
, sta
);
4635 rx
.sdata
= rx
.sta
->sdata
;
4636 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
4643 for_each_sta_info(local
, hdr
->addr2
, sta
, tmp
) {
4650 rx
.sdata
= prev_sta
->sdata
;
4651 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
4658 rx
.sdata
= prev_sta
->sdata
;
4660 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
4668 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4669 if (!ieee80211_sdata_running(sdata
))
4672 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
4673 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
4677 * frame is destined for this interface, but if it's
4678 * not also for the previous one we handle that after
4679 * the loop to avoid copying the SKB once too much
4687 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
4689 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
4695 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
4698 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
4707 * This is the receive path handler. It is called by a low level driver when an
4708 * 802.11 MPDU is received from the hardware.
4710 void ieee80211_rx_list(struct ieee80211_hw
*hw
, struct ieee80211_sta
*pubsta
,
4711 struct sk_buff
*skb
, struct list_head
*list
)
4713 struct ieee80211_local
*local
= hw_to_local(hw
);
4714 struct ieee80211_rate
*rate
= NULL
;
4715 struct ieee80211_supported_band
*sband
;
4716 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
4718 WARN_ON_ONCE(softirq_count() == 0);
4720 if (WARN_ON(status
->band
>= NUM_NL80211_BANDS
))
4723 sband
= local
->hw
.wiphy
->bands
[status
->band
];
4724 if (WARN_ON(!sband
))
4728 * If we're suspending, it is possible although not too likely
4729 * that we'd be receiving frames after having already partially
4730 * quiesced the stack. We can't process such frames then since
4731 * that might, for example, cause stations to be added or other
4732 * driver callbacks be invoked.
4734 if (unlikely(local
->quiescing
|| local
->suspended
))
4737 /* We might be during a HW reconfig, prevent Rx for the same reason */
4738 if (unlikely(local
->in_reconfig
))
4742 * The same happens when we're not even started,
4743 * but that's worth a warning.
4745 if (WARN_ON(!local
->started
))
4748 if (likely(!(status
->flag
& RX_FLAG_FAILED_PLCP_CRC
))) {
4750 * Validate the rate, unless a PLCP error means that
4751 * we probably can't have a valid rate here anyway.
4754 switch (status
->encoding
) {
4757 * rate_idx is MCS index, which can be [0-76]
4760 * https://wireless.wiki.kernel.org/en/developers/Documentation/ieee80211/802.11n
4762 * Anything else would be some sort of driver or
4763 * hardware error. The driver should catch hardware
4766 if (WARN(status
->rate_idx
> 76,
4767 "Rate marked as an HT rate but passed "
4768 "status->rate_idx is not "
4769 "an MCS index [0-76]: %d (0x%02x)\n",
4775 if (WARN_ONCE(status
->rate_idx
> 9 ||
4778 "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
4779 status
->rate_idx
, status
->nss
))
4783 if (WARN_ONCE(status
->rate_idx
> 11 ||
4786 "Rate marked as an HE rate but data is invalid: MCS: %d, NSS: %d\n",
4787 status
->rate_idx
, status
->nss
))
4794 if (WARN_ON(status
->rate_idx
>= sband
->n_bitrates
))
4796 rate
= &sband
->bitrates
[status
->rate_idx
];
4800 status
->rx_flags
= 0;
4802 kcov_remote_start_common(skb_get_kcov_handle(skb
));
4805 * Frames with failed FCS/PLCP checksum are not returned,
4806 * all other frames are returned without radiotap header
4807 * if it was previously present.
4808 * Also, frames with less than 16 bytes are dropped.
4810 if (!(status
->flag
& RX_FLAG_8023
))
4811 skb
= ieee80211_rx_monitor(local
, skb
, rate
);
4813 ieee80211_tpt_led_trig_rx(local
,
4814 ((struct ieee80211_hdr
*)skb
->data
)->frame_control
,
4817 if (status
->flag
& RX_FLAG_8023
)
4818 __ieee80211_rx_handle_8023(hw
, pubsta
, skb
, list
);
4820 __ieee80211_rx_handle_packet(hw
, pubsta
, skb
, list
);
4828 EXPORT_SYMBOL(ieee80211_rx_list
);
4830 void ieee80211_rx_napi(struct ieee80211_hw
*hw
, struct ieee80211_sta
*pubsta
,
4831 struct sk_buff
*skb
, struct napi_struct
*napi
)
4833 struct sk_buff
*tmp
;
4838 * key references and virtual interfaces are protected using RCU
4839 * and this requires that we are in a read-side RCU section during
4840 * receive processing
4843 ieee80211_rx_list(hw
, pubsta
, skb
, &list
);
4847 netif_receive_skb_list(&list
);
4851 list_for_each_entry_safe(skb
, tmp
, &list
, list
) {
4852 skb_list_del_init(skb
);
4853 napi_gro_receive(napi
, skb
);
4856 EXPORT_SYMBOL(ieee80211_rx_napi
);
4858 /* This is a version of the rx handler that can be called from hard irq
4859 * context. Post the skb on the queue and schedule the tasklet */
4860 void ieee80211_rx_irqsafe(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
4862 struct ieee80211_local
*local
= hw_to_local(hw
);
4864 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status
) > sizeof(skb
->cb
));
4866 skb
->pkt_type
= IEEE80211_RX_MSG
;
4867 skb_queue_tail(&local
->skb_queue
, skb
);
4868 tasklet_schedule(&local
->tasklet
);
4870 EXPORT_SYMBOL(ieee80211_rx_irqsafe
);