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/bitops.h>
21 #include <net/mac80211.h>
22 #include <net/ieee80211_radiotap.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
35 static inline void ieee80211_rx_stats(struct net_device
*dev
, u32 len
)
37 struct pcpu_sw_netstats
*tstats
= this_cpu_ptr(dev
->tstats
);
39 u64_stats_update_begin(&tstats
->syncp
);
41 tstats
->rx_bytes
+= len
;
42 u64_stats_update_end(&tstats
->syncp
);
46 * monitor mode reception
48 * This function cleans up the SKB, i.e. it removes all the stuff
49 * only useful for monitoring.
51 static struct sk_buff
*ieee80211_clean_skb(struct sk_buff
*skb
,
52 unsigned int present_fcs_len
,
53 unsigned int rtap_space
)
55 struct ieee80211_hdr
*hdr
;
60 __pskb_trim(skb
, skb
->len
- present_fcs_len
);
61 __pskb_pull(skb
, rtap_space
);
63 hdr
= (void *)skb
->data
;
64 fc
= hdr
->frame_control
;
67 * Remove the HT-Control field (if present) on management
68 * frames after we've sent the frame to monitoring. We
69 * (currently) don't need it, and don't properly parse
70 * frames with it present, due to the assumption of a
71 * fixed management header length.
73 if (likely(!ieee80211_is_mgmt(fc
) || !ieee80211_has_order(fc
)))
76 hdrlen
= ieee80211_hdrlen(fc
);
77 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_ORDER
);
79 if (!pskb_may_pull(skb
, hdrlen
)) {
84 memmove(skb
->data
+ IEEE80211_HT_CTL_LEN
, skb
->data
,
85 hdrlen
- IEEE80211_HT_CTL_LEN
);
86 __pskb_pull(skb
, IEEE80211_HT_CTL_LEN
);
91 static inline bool should_drop_frame(struct sk_buff
*skb
, int present_fcs_len
,
92 unsigned int rtap_space
)
94 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
95 struct ieee80211_hdr
*hdr
;
97 hdr
= (void *)(skb
->data
+ rtap_space
);
99 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
|
100 RX_FLAG_FAILED_PLCP_CRC
|
101 RX_FLAG_ONLY_MONITOR
|
105 if (unlikely(skb
->len
< 16 + present_fcs_len
+ rtap_space
))
108 if (ieee80211_is_ctl(hdr
->frame_control
) &&
109 !ieee80211_is_pspoll(hdr
->frame_control
) &&
110 !ieee80211_is_back_req(hdr
->frame_control
))
117 ieee80211_rx_radiotap_hdrlen(struct ieee80211_local
*local
,
118 struct ieee80211_rx_status
*status
,
123 /* always present fields */
124 len
= sizeof(struct ieee80211_radiotap_header
) + 8;
126 /* allocate extra bitmaps */
128 len
+= 4 * hweight8(status
->chains
);
129 /* vendor presence bitmap */
130 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
)
133 if (ieee80211_have_rx_timestamp(status
)) {
137 if (ieee80211_hw_check(&local
->hw
, SIGNAL_DBM
))
140 /* antenna field, if we don't have per-chain info */
144 /* padding for RX_FLAGS if necessary */
147 if (status
->encoding
== RX_ENC_HT
) /* HT info */
150 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
155 if (status
->encoding
== RX_ENC_VHT
) {
160 if (local
->hw
.radiotap_timestamp
.units_pos
>= 0) {
165 if (status
->encoding
== RX_ENC_HE
&&
166 status
->flag
& RX_FLAG_RADIOTAP_HE
) {
169 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he
) != 12);
172 if (status
->encoding
== RX_ENC_HE
&&
173 status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
176 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu
) != 12);
179 if (status
->flag
& RX_FLAG_NO_PSDU
)
182 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
185 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig
) != 4);
188 if (status
->chains
) {
189 /* antenna and antenna signal fields */
190 len
+= 2 * hweight8(status
->chains
);
193 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
194 struct ieee80211_vendor_radiotap
*rtap
;
195 int vendor_data_offset
= 0;
198 * The position to look at depends on the existence (or non-
199 * existence) of other elements, so take that into account...
201 if (status
->flag
& RX_FLAG_RADIOTAP_HE
)
202 vendor_data_offset
+=
203 sizeof(struct ieee80211_radiotap_he
);
204 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
)
205 vendor_data_offset
+=
206 sizeof(struct ieee80211_radiotap_he_mu
);
207 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
)
208 vendor_data_offset
+=
209 sizeof(struct ieee80211_radiotap_lsig
);
211 rtap
= (void *)&skb
->data
[vendor_data_offset
];
213 /* alignment for fixed 6-byte vendor data header */
215 /* vendor data header */
217 if (WARN_ON(rtap
->align
== 0))
219 len
= ALIGN(len
, rtap
->align
);
220 len
+= rtap
->len
+ rtap
->pad
;
226 static void ieee80211_handle_mu_mimo_mon(struct ieee80211_sub_if_data
*sdata
,
231 struct ieee80211_hdr_3addr hdr
;
234 } __packed
__aligned(2) action
;
239 BUILD_BUG_ON(sizeof(action
) != IEEE80211_MIN_ACTION_SIZE
+ 1);
241 if (skb
->len
< rtap_space
+ sizeof(action
) +
242 VHT_MUMIMO_GROUPS_DATA_LEN
)
245 if (!is_valid_ether_addr(sdata
->u
.mntr
.mu_follow_addr
))
248 skb_copy_bits(skb
, rtap_space
, &action
, sizeof(action
));
250 if (!ieee80211_is_action(action
.hdr
.frame_control
))
253 if (action
.category
!= WLAN_CATEGORY_VHT
)
256 if (action
.action_code
!= WLAN_VHT_ACTION_GROUPID_MGMT
)
259 if (!ether_addr_equal(action
.hdr
.addr1
, sdata
->u
.mntr
.mu_follow_addr
))
262 skb
= skb_copy(skb
, GFP_ATOMIC
);
266 skb_queue_tail(&sdata
->skb_queue
, skb
);
267 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
271 * ieee80211_add_rx_radiotap_header - add radiotap header
273 * add a radiotap header containing all the fields which the hardware provided.
276 ieee80211_add_rx_radiotap_header(struct ieee80211_local
*local
,
278 struct ieee80211_rate
*rate
,
279 int rtap_len
, bool has_fcs
)
281 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
282 struct ieee80211_radiotap_header
*rthdr
;
287 u16 channel_flags
= 0;
289 unsigned long chains
= status
->chains
;
290 struct ieee80211_vendor_radiotap rtap
= {};
291 struct ieee80211_radiotap_he he
= {};
292 struct ieee80211_radiotap_he_mu he_mu
= {};
293 struct ieee80211_radiotap_lsig lsig
= {};
295 if (status
->flag
& RX_FLAG_RADIOTAP_HE
) {
296 he
= *(struct ieee80211_radiotap_he
*)skb
->data
;
297 skb_pull(skb
, sizeof(he
));
298 WARN_ON_ONCE(status
->encoding
!= RX_ENC_HE
);
301 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
302 he_mu
= *(struct ieee80211_radiotap_he_mu
*)skb
->data
;
303 skb_pull(skb
, sizeof(he_mu
));
306 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
307 lsig
= *(struct ieee80211_radiotap_lsig
*)skb
->data
;
308 skb_pull(skb
, sizeof(lsig
));
311 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
312 rtap
= *(struct ieee80211_vendor_radiotap
*)skb
->data
;
313 /* rtap.len and rtap.pad are undone immediately */
314 skb_pull(skb
, sizeof(rtap
) + rtap
.len
+ rtap
.pad
);
318 if (!(has_fcs
&& ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
)))
321 rthdr
= skb_push(skb
, rtap_len
);
322 memset(rthdr
, 0, rtap_len
- rtap
.len
- rtap
.pad
);
323 it_present
= &rthdr
->it_present
;
325 /* radiotap header, set always present flags */
326 rthdr
->it_len
= cpu_to_le16(rtap_len
);
327 it_present_val
= BIT(IEEE80211_RADIOTAP_FLAGS
) |
328 BIT(IEEE80211_RADIOTAP_CHANNEL
) |
329 BIT(IEEE80211_RADIOTAP_RX_FLAGS
);
332 it_present_val
|= BIT(IEEE80211_RADIOTAP_ANTENNA
);
334 for_each_set_bit(chain
, &chains
, IEEE80211_MAX_CHAINS
) {
336 BIT(IEEE80211_RADIOTAP_EXT
) |
337 BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE
);
338 put_unaligned_le32(it_present_val
, it_present
);
340 it_present_val
= BIT(IEEE80211_RADIOTAP_ANTENNA
) |
341 BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL
);
344 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
345 it_present_val
|= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE
) |
346 BIT(IEEE80211_RADIOTAP_EXT
);
347 put_unaligned_le32(it_present_val
, it_present
);
349 it_present_val
= rtap
.present
;
352 put_unaligned_le32(it_present_val
, it_present
);
354 pos
= (void *)(it_present
+ 1);
356 /* the order of the following fields is important */
358 /* IEEE80211_RADIOTAP_TSFT */
359 if (ieee80211_have_rx_timestamp(status
)) {
361 while ((pos
- (u8
*)rthdr
) & 7)
364 ieee80211_calculate_rx_timestamp(local
, status
,
367 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT
);
371 /* IEEE80211_RADIOTAP_FLAGS */
372 if (has_fcs
&& ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
))
373 *pos
|= IEEE80211_RADIOTAP_F_FCS
;
374 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
| RX_FLAG_FAILED_PLCP_CRC
))
375 *pos
|= IEEE80211_RADIOTAP_F_BADFCS
;
376 if (status
->enc_flags
& RX_ENC_FLAG_SHORTPRE
)
377 *pos
|= IEEE80211_RADIOTAP_F_SHORTPRE
;
380 /* IEEE80211_RADIOTAP_RATE */
381 if (!rate
|| status
->encoding
!= RX_ENC_LEGACY
) {
383 * Without rate information don't add it. If we have,
384 * MCS information is a separate field in radiotap,
385 * added below. The byte here is needed as padding
386 * for the channel though, so initialise it to 0.
391 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE
);
392 if (status
->bw
== RATE_INFO_BW_10
)
394 else if (status
->bw
== RATE_INFO_BW_5
)
396 *pos
= DIV_ROUND_UP(rate
->bitrate
, 5 * (1 << shift
));
400 /* IEEE80211_RADIOTAP_CHANNEL */
401 /* TODO: frequency offset in KHz */
402 put_unaligned_le16(status
->freq
, pos
);
404 if (status
->bw
== RATE_INFO_BW_10
)
405 channel_flags
|= IEEE80211_CHAN_HALF
;
406 else if (status
->bw
== RATE_INFO_BW_5
)
407 channel_flags
|= IEEE80211_CHAN_QUARTER
;
409 if (status
->band
== NL80211_BAND_5GHZ
||
410 status
->band
== NL80211_BAND_6GHZ
)
411 channel_flags
|= IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_5GHZ
;
412 else if (status
->encoding
!= RX_ENC_LEGACY
)
413 channel_flags
|= IEEE80211_CHAN_DYN
| IEEE80211_CHAN_2GHZ
;
414 else if (rate
&& rate
->flags
& IEEE80211_RATE_ERP_G
)
415 channel_flags
|= IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_2GHZ
;
417 channel_flags
|= IEEE80211_CHAN_CCK
| IEEE80211_CHAN_2GHZ
;
419 channel_flags
|= IEEE80211_CHAN_2GHZ
;
420 put_unaligned_le16(channel_flags
, pos
);
423 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
424 if (ieee80211_hw_check(&local
->hw
, SIGNAL_DBM
) &&
425 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
426 *pos
= status
->signal
;
428 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL
);
432 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
434 if (!status
->chains
) {
435 /* IEEE80211_RADIOTAP_ANTENNA */
436 *pos
= status
->antenna
;
440 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
442 /* IEEE80211_RADIOTAP_RX_FLAGS */
443 /* ensure 2 byte alignment for the 2 byte field as required */
444 if ((pos
- (u8
*)rthdr
) & 1)
446 if (status
->flag
& RX_FLAG_FAILED_PLCP_CRC
)
447 rx_flags
|= IEEE80211_RADIOTAP_F_RX_BADPLCP
;
448 put_unaligned_le16(rx_flags
, pos
);
451 if (status
->encoding
== RX_ENC_HT
) {
454 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS
);
455 *pos
++ = local
->hw
.radiotap_mcs_details
;
457 if (status
->enc_flags
& RX_ENC_FLAG_SHORT_GI
)
458 *pos
|= IEEE80211_RADIOTAP_MCS_SGI
;
459 if (status
->bw
== RATE_INFO_BW_40
)
460 *pos
|= IEEE80211_RADIOTAP_MCS_BW_40
;
461 if (status
->enc_flags
& RX_ENC_FLAG_HT_GF
)
462 *pos
|= IEEE80211_RADIOTAP_MCS_FMT_GF
;
463 if (status
->enc_flags
& RX_ENC_FLAG_LDPC
)
464 *pos
|= IEEE80211_RADIOTAP_MCS_FEC_LDPC
;
465 stbc
= (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
) >> RX_ENC_FLAG_STBC_SHIFT
;
466 *pos
|= stbc
<< IEEE80211_RADIOTAP_MCS_STBC_SHIFT
;
468 *pos
++ = status
->rate_idx
;
471 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
474 /* ensure 4 byte alignment */
475 while ((pos
- (u8
*)rthdr
) & 3)
478 cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS
);
479 put_unaligned_le32(status
->ampdu_reference
, pos
);
481 if (status
->flag
& RX_FLAG_AMPDU_LAST_KNOWN
)
482 flags
|= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN
;
483 if (status
->flag
& RX_FLAG_AMPDU_IS_LAST
)
484 flags
|= IEEE80211_RADIOTAP_AMPDU_IS_LAST
;
485 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_ERROR
)
486 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR
;
487 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
488 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN
;
489 if (status
->flag
& RX_FLAG_AMPDU_EOF_BIT_KNOWN
)
490 flags
|= IEEE80211_RADIOTAP_AMPDU_EOF_KNOWN
;
491 if (status
->flag
& RX_FLAG_AMPDU_EOF_BIT
)
492 flags
|= IEEE80211_RADIOTAP_AMPDU_EOF
;
493 put_unaligned_le16(flags
, pos
);
495 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
496 *pos
++ = status
->ampdu_delimiter_crc
;
502 if (status
->encoding
== RX_ENC_VHT
) {
503 u16 known
= local
->hw
.radiotap_vht_details
;
505 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT
);
506 put_unaligned_le16(known
, pos
);
509 if (status
->enc_flags
& RX_ENC_FLAG_SHORT_GI
)
510 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_SGI
;
511 /* in VHT, STBC is binary */
512 if (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
)
513 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_STBC
;
514 if (status
->enc_flags
& RX_ENC_FLAG_BF
)
515 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED
;
518 switch (status
->bw
) {
519 case RATE_INFO_BW_80
:
522 case RATE_INFO_BW_160
:
525 case RATE_INFO_BW_40
:
532 *pos
= (status
->rate_idx
<< 4) | status
->nss
;
535 if (status
->enc_flags
& RX_ENC_FLAG_LDPC
)
536 *pos
|= IEEE80211_RADIOTAP_CODING_LDPC_USER0
;
544 if (local
->hw
.radiotap_timestamp
.units_pos
>= 0) {
546 u8 flags
= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT
;
549 cpu_to_le32(1 << IEEE80211_RADIOTAP_TIMESTAMP
);
551 /* ensure 8 byte alignment */
552 while ((pos
- (u8
*)rthdr
) & 7)
555 put_unaligned_le64(status
->device_timestamp
, pos
);
558 if (local
->hw
.radiotap_timestamp
.accuracy
>= 0) {
559 accuracy
= local
->hw
.radiotap_timestamp
.accuracy
;
560 flags
|= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY
;
562 put_unaligned_le16(accuracy
, pos
);
565 *pos
++ = local
->hw
.radiotap_timestamp
.units_pos
;
569 if (status
->encoding
== RX_ENC_HE
&&
570 status
->flag
& RX_FLAG_RADIOTAP_HE
) {
571 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
573 if (status
->enc_flags
& RX_ENC_FLAG_STBC_MASK
) {
574 he
.data6
|= HE_PREP(DATA6_NSTS
,
575 FIELD_GET(RX_ENC_FLAG_STBC_MASK
,
577 he
.data3
|= HE_PREP(DATA3_STBC
, 1);
579 he
.data6
|= HE_PREP(DATA6_NSTS
, status
->nss
);
582 #define CHECK_GI(s) \
583 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
584 (int)NL80211_RATE_INFO_HE_GI_##s)
590 he
.data3
|= HE_PREP(DATA3_DATA_MCS
, status
->rate_idx
);
591 he
.data3
|= HE_PREP(DATA3_DATA_DCM
, status
->he_dcm
);
592 he
.data3
|= HE_PREP(DATA3_CODING
,
593 !!(status
->enc_flags
& RX_ENC_FLAG_LDPC
));
595 he
.data5
|= HE_PREP(DATA5_GI
, status
->he_gi
);
597 switch (status
->bw
) {
598 case RATE_INFO_BW_20
:
599 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
600 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ
);
602 case RATE_INFO_BW_40
:
603 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
604 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ
);
606 case RATE_INFO_BW_80
:
607 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
608 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ
);
610 case RATE_INFO_BW_160
:
611 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
612 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ
);
614 case RATE_INFO_BW_HE_RU
:
615 #define CHECK_RU_ALLOC(s) \
616 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
617 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
625 CHECK_RU_ALLOC(2x996
);
627 he
.data5
|= HE_PREP(DATA5_DATA_BW_RU_ALLOC
,
631 WARN_ONCE(1, "Invalid SU BW %d\n", status
->bw
);
634 /* ensure 2 byte alignment */
635 while ((pos
- (u8
*)rthdr
) & 1)
637 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE
);
638 memcpy(pos
, &he
, sizeof(he
));
642 if (status
->encoding
== RX_ENC_HE
&&
643 status
->flag
& RX_FLAG_RADIOTAP_HE_MU
) {
644 /* ensure 2 byte alignment */
645 while ((pos
- (u8
*)rthdr
) & 1)
647 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE_MU
);
648 memcpy(pos
, &he_mu
, sizeof(he_mu
));
649 pos
+= sizeof(he_mu
);
652 if (status
->flag
& RX_FLAG_NO_PSDU
) {
654 cpu_to_le32(1 << IEEE80211_RADIOTAP_ZERO_LEN_PSDU
);
655 *pos
++ = status
->zero_length_psdu_type
;
658 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
) {
659 /* ensure 2 byte alignment */
660 while ((pos
- (u8
*)rthdr
) & 1)
662 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_LSIG
);
663 memcpy(pos
, &lsig
, sizeof(lsig
));
667 for_each_set_bit(chain
, &chains
, IEEE80211_MAX_CHAINS
) {
668 *pos
++ = status
->chain_signal
[chain
];
672 if (status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
) {
673 /* ensure 2 byte alignment for the vendor field as required */
674 if ((pos
- (u8
*)rthdr
) & 1)
676 *pos
++ = rtap
.oui
[0];
677 *pos
++ = rtap
.oui
[1];
678 *pos
++ = rtap
.oui
[2];
680 put_unaligned_le16(rtap
.len
, pos
);
682 /* align the actual payload as requested */
683 while ((pos
- (u8
*)rthdr
) & (rtap
.align
- 1))
685 /* data (and possible padding) already follows */
689 static struct sk_buff
*
690 ieee80211_make_monitor_skb(struct ieee80211_local
*local
,
691 struct sk_buff
**origskb
,
692 struct ieee80211_rate
*rate
,
693 int rtap_space
, bool use_origskb
)
695 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(*origskb
);
696 int rt_hdrlen
, needed_headroom
;
699 /* room for the radiotap header based on driver features */
700 rt_hdrlen
= ieee80211_rx_radiotap_hdrlen(local
, status
, *origskb
);
701 needed_headroom
= rt_hdrlen
- rtap_space
;
704 /* only need to expand headroom if necessary */
709 * This shouldn't trigger often because most devices have an
710 * RX header they pull before we get here, and that should
711 * be big enough for our radiotap information. We should
712 * probably export the length to drivers so that we can have
713 * them allocate enough headroom to start with.
715 if (skb_headroom(skb
) < needed_headroom
&&
716 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
)) {
722 * Need to make a copy and possibly remove radiotap header
723 * and FCS from the original.
725 skb
= skb_copy_expand(*origskb
, needed_headroom
, 0, GFP_ATOMIC
);
731 /* prepend radiotap information */
732 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, rt_hdrlen
, true);
734 skb_reset_mac_header(skb
);
735 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
736 skb
->pkt_type
= PACKET_OTHERHOST
;
737 skb
->protocol
= htons(ETH_P_802_2
);
743 * This function copies a received frame to all monitor interfaces and
744 * returns a cleaned-up SKB that no longer includes the FCS nor the
745 * radiotap header the driver might have added.
747 static struct sk_buff
*
748 ieee80211_rx_monitor(struct ieee80211_local
*local
, struct sk_buff
*origskb
,
749 struct ieee80211_rate
*rate
)
751 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(origskb
);
752 struct ieee80211_sub_if_data
*sdata
;
753 struct sk_buff
*monskb
= NULL
;
754 int present_fcs_len
= 0;
755 unsigned int rtap_space
= 0;
756 struct ieee80211_sub_if_data
*monitor_sdata
=
757 rcu_dereference(local
->monitor_sdata
);
758 bool only_monitor
= false;
759 unsigned int min_head_len
;
761 if (status
->flag
& RX_FLAG_RADIOTAP_HE
)
762 rtap_space
+= sizeof(struct ieee80211_radiotap_he
);
764 if (status
->flag
& RX_FLAG_RADIOTAP_HE_MU
)
765 rtap_space
+= sizeof(struct ieee80211_radiotap_he_mu
);
767 if (status
->flag
& RX_FLAG_RADIOTAP_LSIG
)
768 rtap_space
+= sizeof(struct ieee80211_radiotap_lsig
);
770 if (unlikely(status
->flag
& RX_FLAG_RADIOTAP_VENDOR_DATA
)) {
771 struct ieee80211_vendor_radiotap
*rtap
=
772 (void *)(origskb
->data
+ rtap_space
);
774 rtap_space
+= sizeof(*rtap
) + rtap
->len
+ rtap
->pad
;
777 min_head_len
= rtap_space
;
780 * First, we may need to make a copy of the skb because
781 * (1) we need to modify it for radiotap (if not present), and
782 * (2) the other RX handlers will modify the skb we got.
784 * We don't need to, of course, if we aren't going to return
785 * the SKB because it has a bad FCS/PLCP checksum.
788 if (!(status
->flag
& RX_FLAG_NO_PSDU
)) {
789 if (ieee80211_hw_check(&local
->hw
, RX_INCLUDES_FCS
)) {
790 if (unlikely(origskb
->len
<= FCS_LEN
+ rtap_space
)) {
793 dev_kfree_skb(origskb
);
796 present_fcs_len
= FCS_LEN
;
799 /* also consider the hdr->frame_control */
803 /* ensure that the expected data elements are in skb head */
804 if (!pskb_may_pull(origskb
, min_head_len
)) {
805 dev_kfree_skb(origskb
);
809 only_monitor
= should_drop_frame(origskb
, present_fcs_len
, rtap_space
);
811 if (!local
->monitors
|| (status
->flag
& RX_FLAG_SKIP_MONITOR
)) {
813 dev_kfree_skb(origskb
);
817 return ieee80211_clean_skb(origskb
, present_fcs_len
,
821 ieee80211_handle_mu_mimo_mon(monitor_sdata
, origskb
, rtap_space
);
823 list_for_each_entry_rcu(sdata
, &local
->mon_list
, u
.mntr
.list
) {
824 bool last_monitor
= list_is_last(&sdata
->u
.mntr
.list
,
828 monskb
= ieee80211_make_monitor_skb(local
, &origskb
,
840 skb
= skb_clone(monskb
, GFP_ATOMIC
);
844 skb
->dev
= sdata
->dev
;
845 ieee80211_rx_stats(skb
->dev
, skb
->len
);
846 netif_receive_skb(skb
);
854 /* this happens if last_monitor was erroneously false */
855 dev_kfree_skb(monskb
);
861 return ieee80211_clean_skb(origskb
, present_fcs_len
, rtap_space
);
864 static void ieee80211_parse_qos(struct ieee80211_rx_data
*rx
)
866 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
867 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
868 int tid
, seqno_idx
, security_idx
;
870 /* does the frame have a qos control field? */
871 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
872 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
873 /* frame has qos control */
874 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
875 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
876 status
->rx_flags
|= IEEE80211_RX_AMSDU
;
882 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
884 * Sequence numbers for management frames, QoS data
885 * frames with a broadcast/multicast address in the
886 * Address 1 field, and all non-QoS data frames sent
887 * by QoS STAs are assigned using an additional single
888 * modulo-4096 counter, [...]
890 * We also use that counter for non-QoS STAs.
892 seqno_idx
= IEEE80211_NUM_TIDS
;
894 if (ieee80211_is_mgmt(hdr
->frame_control
))
895 security_idx
= IEEE80211_NUM_TIDS
;
899 rx
->seqno_idx
= seqno_idx
;
900 rx
->security_idx
= security_idx
;
901 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
902 * For now, set skb->priority to 0 for other cases. */
903 rx
->skb
->priority
= (tid
> 7) ? 0 : tid
;
907 * DOC: Packet alignment
909 * Drivers always need to pass packets that are aligned to two-byte boundaries
912 * Additionally, should, if possible, align the payload data in a way that
913 * guarantees that the contained IP header is aligned to a four-byte
914 * boundary. In the case of regular frames, this simply means aligning the
915 * payload to a four-byte boundary (because either the IP header is directly
916 * contained, or IV/RFC1042 headers that have a length divisible by four are
917 * in front of it). If the payload data is not properly aligned and the
918 * architecture doesn't support efficient unaligned operations, mac80211
919 * will align the data.
921 * With A-MSDU frames, however, the payload data address must yield two modulo
922 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
923 * push the IP header further back to a multiple of four again. Thankfully, the
924 * specs were sane enough this time around to require padding each A-MSDU
925 * subframe to a length that is a multiple of four.
927 * Padding like Atheros hardware adds which is between the 802.11 header and
928 * the payload is not supported, the driver is required to move the 802.11
929 * header to be directly in front of the payload in that case.
931 static void ieee80211_verify_alignment(struct ieee80211_rx_data
*rx
)
933 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
934 WARN_ON_ONCE((unsigned long)rx
->skb
->data
& 1);
941 static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff
*skb
)
943 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
945 if (is_multicast_ether_addr(hdr
->addr1
))
948 return ieee80211_is_robust_mgmt_frame(skb
);
952 static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff
*skb
)
954 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
956 if (!is_multicast_ether_addr(hdr
->addr1
))
959 return ieee80211_is_robust_mgmt_frame(skb
);
963 /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
964 static int ieee80211_get_mmie_keyidx(struct sk_buff
*skb
)
966 struct ieee80211_mgmt
*hdr
= (struct ieee80211_mgmt
*) skb
->data
;
967 struct ieee80211_mmie
*mmie
;
968 struct ieee80211_mmie_16
*mmie16
;
970 if (skb
->len
< 24 + sizeof(*mmie
) || !is_multicast_ether_addr(hdr
->da
))
973 if (!ieee80211_is_robust_mgmt_frame(skb
) &&
974 !ieee80211_is_beacon(hdr
->frame_control
))
975 return -1; /* not a robust management frame */
977 mmie
= (struct ieee80211_mmie
*)
978 (skb
->data
+ skb
->len
- sizeof(*mmie
));
979 if (mmie
->element_id
== WLAN_EID_MMIE
&&
980 mmie
->length
== sizeof(*mmie
) - 2)
981 return le16_to_cpu(mmie
->key_id
);
983 mmie16
= (struct ieee80211_mmie_16
*)
984 (skb
->data
+ skb
->len
- sizeof(*mmie16
));
985 if (skb
->len
>= 24 + sizeof(*mmie16
) &&
986 mmie16
->element_id
== WLAN_EID_MMIE
&&
987 mmie16
->length
== sizeof(*mmie16
) - 2)
988 return le16_to_cpu(mmie16
->key_id
);
993 static int ieee80211_get_keyid(struct sk_buff
*skb
,
994 const struct ieee80211_cipher_scheme
*cs
)
996 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1004 fc
= hdr
->frame_control
;
1005 hdrlen
= ieee80211_hdrlen(fc
);
1008 minlen
= hdrlen
+ cs
->hdr_len
;
1009 key_idx_off
= hdrlen
+ cs
->key_idx_off
;
1010 key_idx_shift
= cs
->key_idx_shift
;
1012 /* WEP, TKIP, CCMP and GCMP */
1013 minlen
= hdrlen
+ IEEE80211_WEP_IV_LEN
;
1014 key_idx_off
= hdrlen
+ 3;
1018 if (unlikely(skb
->len
< minlen
))
1021 skb_copy_bits(skb
, key_idx_off
, &keyid
, 1);
1024 keyid
&= cs
->key_idx_mask
;
1025 keyid
>>= key_idx_shift
;
1027 /* cs could use more than the usual two bits for the keyid */
1028 if (unlikely(keyid
>= NUM_DEFAULT_KEYS
))
1034 static ieee80211_rx_result
ieee80211_rx_mesh_check(struct ieee80211_rx_data
*rx
)
1036 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1037 char *dev_addr
= rx
->sdata
->vif
.addr
;
1039 if (ieee80211_is_data(hdr
->frame_control
)) {
1040 if (is_multicast_ether_addr(hdr
->addr1
)) {
1041 if (ieee80211_has_tods(hdr
->frame_control
) ||
1042 !ieee80211_has_fromds(hdr
->frame_control
))
1043 return RX_DROP_MONITOR
;
1044 if (ether_addr_equal(hdr
->addr3
, dev_addr
))
1045 return RX_DROP_MONITOR
;
1047 if (!ieee80211_has_a4(hdr
->frame_control
))
1048 return RX_DROP_MONITOR
;
1049 if (ether_addr_equal(hdr
->addr4
, dev_addr
))
1050 return RX_DROP_MONITOR
;
1054 /* If there is not an established peer link and this is not a peer link
1055 * establisment frame, beacon or probe, drop the frame.
1058 if (!rx
->sta
|| sta_plink_state(rx
->sta
) != NL80211_PLINK_ESTAB
) {
1059 struct ieee80211_mgmt
*mgmt
;
1061 if (!ieee80211_is_mgmt(hdr
->frame_control
))
1062 return RX_DROP_MONITOR
;
1064 if (ieee80211_is_action(hdr
->frame_control
)) {
1067 /* make sure category field is present */
1068 if (rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
)
1069 return RX_DROP_MONITOR
;
1071 mgmt
= (struct ieee80211_mgmt
*)hdr
;
1072 category
= mgmt
->u
.action
.category
;
1073 if (category
!= WLAN_CATEGORY_MESH_ACTION
&&
1074 category
!= WLAN_CATEGORY_SELF_PROTECTED
)
1075 return RX_DROP_MONITOR
;
1079 if (ieee80211_is_probe_req(hdr
->frame_control
) ||
1080 ieee80211_is_probe_resp(hdr
->frame_control
) ||
1081 ieee80211_is_beacon(hdr
->frame_control
) ||
1082 ieee80211_is_auth(hdr
->frame_control
))
1085 return RX_DROP_MONITOR
;
1091 static inline bool ieee80211_rx_reorder_ready(struct tid_ampdu_rx
*tid_agg_rx
,
1094 struct sk_buff_head
*frames
= &tid_agg_rx
->reorder_buf
[index
];
1095 struct sk_buff
*tail
= skb_peek_tail(frames
);
1096 struct ieee80211_rx_status
*status
;
1098 if (tid_agg_rx
->reorder_buf_filtered
& BIT_ULL(index
))
1104 status
= IEEE80211_SKB_RXCB(tail
);
1105 if (status
->flag
& RX_FLAG_AMSDU_MORE
)
1111 static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data
*sdata
,
1112 struct tid_ampdu_rx
*tid_agg_rx
,
1114 struct sk_buff_head
*frames
)
1116 struct sk_buff_head
*skb_list
= &tid_agg_rx
->reorder_buf
[index
];
1117 struct sk_buff
*skb
;
1118 struct ieee80211_rx_status
*status
;
1120 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1122 if (skb_queue_empty(skb_list
))
1125 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1126 __skb_queue_purge(skb_list
);
1130 /* release frames from the reorder ring buffer */
1131 tid_agg_rx
->stored_mpdu_num
--;
1132 while ((skb
= __skb_dequeue(skb_list
))) {
1133 status
= IEEE80211_SKB_RXCB(skb
);
1134 status
->rx_flags
|= IEEE80211_RX_DEFERRED_RELEASE
;
1135 __skb_queue_tail(frames
, skb
);
1139 tid_agg_rx
->reorder_buf_filtered
&= ~BIT_ULL(index
);
1140 tid_agg_rx
->head_seq_num
= ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
1143 static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data
*sdata
,
1144 struct tid_ampdu_rx
*tid_agg_rx
,
1146 struct sk_buff_head
*frames
)
1150 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1152 while (ieee80211_sn_less(tid_agg_rx
->head_seq_num
, head_seq_num
)) {
1153 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1154 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
1160 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
1161 * the skb was added to the buffer longer than this time ago, the earlier
1162 * frames that have not yet been received are assumed to be lost and the skb
1163 * can be released for processing. This may also release other skb's from the
1164 * reorder buffer if there are no additional gaps between the frames.
1166 * Callers must hold tid_agg_rx->reorder_lock.
1168 #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
1170 static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data
*sdata
,
1171 struct tid_ampdu_rx
*tid_agg_rx
,
1172 struct sk_buff_head
*frames
)
1176 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
1178 /* release the buffer until next missing frame */
1179 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1180 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, index
) &&
1181 tid_agg_rx
->stored_mpdu_num
) {
1183 * No buffers ready to be released, but check whether any
1184 * frames in the reorder buffer have timed out.
1187 for (j
= (index
+ 1) % tid_agg_rx
->buf_size
; j
!= index
;
1188 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
1189 if (!ieee80211_rx_reorder_ready(tid_agg_rx
, j
)) {
1194 !time_after(jiffies
, tid_agg_rx
->reorder_time
[j
] +
1195 HT_RX_REORDER_BUF_TIMEOUT
))
1196 goto set_release_timer
;
1198 /* don't leave incomplete A-MSDUs around */
1199 for (i
= (index
+ 1) % tid_agg_rx
->buf_size
; i
!= j
;
1200 i
= (i
+ 1) % tid_agg_rx
->buf_size
)
1201 __skb_queue_purge(&tid_agg_rx
->reorder_buf
[i
]);
1203 ht_dbg_ratelimited(sdata
,
1204 "release an RX reorder frame due to timeout on earlier frames\n");
1205 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, j
,
1209 * Increment the head seq# also for the skipped slots.
1211 tid_agg_rx
->head_seq_num
=
1212 (tid_agg_rx
->head_seq_num
+
1213 skipped
) & IEEE80211_SN_MASK
;
1216 } else while (ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1217 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
1219 index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1222 if (tid_agg_rx
->stored_mpdu_num
) {
1223 j
= index
= tid_agg_rx
->head_seq_num
% tid_agg_rx
->buf_size
;
1225 for (; j
!= (index
- 1) % tid_agg_rx
->buf_size
;
1226 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
1227 if (ieee80211_rx_reorder_ready(tid_agg_rx
, j
))
1233 if (!tid_agg_rx
->removed
)
1234 mod_timer(&tid_agg_rx
->reorder_timer
,
1235 tid_agg_rx
->reorder_time
[j
] + 1 +
1236 HT_RX_REORDER_BUF_TIMEOUT
);
1238 del_timer(&tid_agg_rx
->reorder_timer
);
1243 * As this function belongs to the RX path it must be under
1244 * rcu_read_lock protection. It returns false if the frame
1245 * can be processed immediately, true if it was consumed.
1247 static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data
*sdata
,
1248 struct tid_ampdu_rx
*tid_agg_rx
,
1249 struct sk_buff
*skb
,
1250 struct sk_buff_head
*frames
)
1252 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1253 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1254 u16 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1255 u16 mpdu_seq_num
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
1256 u16 head_seq_num
, buf_size
;
1260 spin_lock(&tid_agg_rx
->reorder_lock
);
1263 * Offloaded BA sessions have no known starting sequence number so pick
1264 * one from first Rxed frame for this tid after BA was started.
1266 if (unlikely(tid_agg_rx
->auto_seq
)) {
1267 tid_agg_rx
->auto_seq
= false;
1268 tid_agg_rx
->ssn
= mpdu_seq_num
;
1269 tid_agg_rx
->head_seq_num
= mpdu_seq_num
;
1272 buf_size
= tid_agg_rx
->buf_size
;
1273 head_seq_num
= tid_agg_rx
->head_seq_num
;
1276 * If the current MPDU's SN is smaller than the SSN, it shouldn't
1279 if (unlikely(!tid_agg_rx
->started
)) {
1280 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
1284 tid_agg_rx
->started
= true;
1287 /* frame with out of date sequence number */
1288 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
1294 * If frame the sequence number exceeds our buffering window
1295 * size release some previous frames to make room for this one.
1297 if (!ieee80211_sn_less(mpdu_seq_num
, head_seq_num
+ buf_size
)) {
1298 head_seq_num
= ieee80211_sn_inc(
1299 ieee80211_sn_sub(mpdu_seq_num
, buf_size
));
1300 /* release stored frames up to new head to stack */
1301 ieee80211_release_reorder_frames(sdata
, tid_agg_rx
,
1302 head_seq_num
, frames
);
1305 /* Now the new frame is always in the range of the reordering buffer */
1307 index
= mpdu_seq_num
% tid_agg_rx
->buf_size
;
1309 /* check if we already stored this frame */
1310 if (ieee80211_rx_reorder_ready(tid_agg_rx
, index
)) {
1316 * If the current MPDU is in the right order and nothing else
1317 * is stored we can process it directly, no need to buffer it.
1318 * If it is first but there's something stored, we may be able
1319 * to release frames after this one.
1321 if (mpdu_seq_num
== tid_agg_rx
->head_seq_num
&&
1322 tid_agg_rx
->stored_mpdu_num
== 0) {
1323 if (!(status
->flag
& RX_FLAG_AMSDU_MORE
))
1324 tid_agg_rx
->head_seq_num
=
1325 ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
1330 /* put the frame in the reordering buffer */
1331 __skb_queue_tail(&tid_agg_rx
->reorder_buf
[index
], skb
);
1332 if (!(status
->flag
& RX_FLAG_AMSDU_MORE
)) {
1333 tid_agg_rx
->reorder_time
[index
] = jiffies
;
1334 tid_agg_rx
->stored_mpdu_num
++;
1335 ieee80211_sta_reorder_release(sdata
, tid_agg_rx
, frames
);
1339 spin_unlock(&tid_agg_rx
->reorder_lock
);
1344 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
1345 * true if the MPDU was buffered, false if it should be processed.
1347 static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data
*rx
,
1348 struct sk_buff_head
*frames
)
1350 struct sk_buff
*skb
= rx
->skb
;
1351 struct ieee80211_local
*local
= rx
->local
;
1352 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1353 struct sta_info
*sta
= rx
->sta
;
1354 struct tid_ampdu_rx
*tid_agg_rx
;
1358 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
1359 is_multicast_ether_addr(hdr
->addr1
))
1363 * filter the QoS data rx stream according to
1364 * STA/TID and check if this STA/TID is on aggregation
1370 ack_policy
= *ieee80211_get_qos_ctl(hdr
) &
1371 IEEE80211_QOS_CTL_ACK_POLICY_MASK
;
1372 tid
= ieee80211_get_tid(hdr
);
1374 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
1376 if (ack_policy
== IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK
&&
1377 !test_bit(tid
, rx
->sta
->ampdu_mlme
.agg_session_valid
) &&
1378 !test_and_set_bit(tid
, rx
->sta
->ampdu_mlme
.unexpected_agg
))
1379 ieee80211_send_delba(rx
->sdata
, rx
->sta
->sta
.addr
, tid
,
1380 WLAN_BACK_RECIPIENT
,
1381 WLAN_REASON_QSTA_REQUIRE_SETUP
);
1385 /* qos null data frames are excluded */
1386 if (unlikely(hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_NULLFUNC
)))
1389 /* not part of a BA session */
1390 if (ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK
&&
1391 ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_NORMAL
)
1394 /* new, potentially un-ordered, ampdu frame - process it */
1396 /* reset session timer */
1397 if (tid_agg_rx
->timeout
)
1398 tid_agg_rx
->last_rx
= jiffies
;
1400 /* if this mpdu is fragmented - terminate rx aggregation session */
1401 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1402 if (sc
& IEEE80211_SCTL_FRAG
) {
1403 skb_queue_tail(&rx
->sdata
->skb_queue
, skb
);
1404 ieee80211_queue_work(&local
->hw
, &rx
->sdata
->work
);
1409 * No locking needed -- we will only ever process one
1410 * RX packet at a time, and thus own tid_agg_rx. All
1411 * other code manipulating it needs to (and does) make
1412 * sure that we cannot get to it any more before doing
1415 if (ieee80211_sta_manage_reorder_buf(rx
->sdata
, tid_agg_rx
, skb
,
1420 __skb_queue_tail(frames
, skb
);
1423 static ieee80211_rx_result debug_noinline
1424 ieee80211_rx_h_check_dup(struct ieee80211_rx_data
*rx
)
1426 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1427 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1429 if (status
->flag
& RX_FLAG_DUP_VALIDATED
)
1433 * Drop duplicate 802.11 retransmissions
1434 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
1437 if (rx
->skb
->len
< 24)
1440 if (ieee80211_is_ctl(hdr
->frame_control
) ||
1441 ieee80211_is_any_nullfunc(hdr
->frame_control
) ||
1442 is_multicast_ether_addr(hdr
->addr1
))
1448 if (unlikely(ieee80211_has_retry(hdr
->frame_control
) &&
1449 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] == hdr
->seq_ctrl
)) {
1450 I802_DEBUG_INC(rx
->local
->dot11FrameDuplicateCount
);
1451 rx
->sta
->rx_stats
.num_duplicates
++;
1452 return RX_DROP_UNUSABLE
;
1453 } else if (!(status
->flag
& RX_FLAG_AMSDU_MORE
)) {
1454 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] = hdr
->seq_ctrl
;
1460 static ieee80211_rx_result debug_noinline
1461 ieee80211_rx_h_check(struct ieee80211_rx_data
*rx
)
1463 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1465 /* Drop disallowed frame classes based on STA auth/assoc state;
1466 * IEEE 802.11, Chap 5.5.
1468 * mac80211 filters only based on association state, i.e. it drops
1469 * Class 3 frames from not associated stations. hostapd sends
1470 * deauth/disassoc frames when needed. In addition, hostapd is
1471 * responsible for filtering on both auth and assoc states.
1474 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1475 return ieee80211_rx_mesh_check(rx
);
1477 if (unlikely((ieee80211_is_data(hdr
->frame_control
) ||
1478 ieee80211_is_pspoll(hdr
->frame_control
)) &&
1479 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1480 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&&
1481 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_OCB
&&
1482 (!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_ASSOC
)))) {
1484 * accept port control frames from the AP even when it's not
1485 * yet marked ASSOC to prevent a race where we don't set the
1486 * assoc bit quickly enough before it sends the first frame
1488 if (rx
->sta
&& rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1489 ieee80211_is_data_present(hdr
->frame_control
)) {
1490 unsigned int hdrlen
;
1493 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
1495 if (rx
->skb
->len
< hdrlen
+ 8)
1496 return RX_DROP_MONITOR
;
1498 skb_copy_bits(rx
->skb
, hdrlen
+ 6, ðertype
, 2);
1499 if (ethertype
== rx
->sdata
->control_port_protocol
)
1503 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
1504 cfg80211_rx_spurious_frame(rx
->sdata
->dev
,
1507 return RX_DROP_UNUSABLE
;
1509 return RX_DROP_MONITOR
;
1516 static ieee80211_rx_result debug_noinline
1517 ieee80211_rx_h_check_more_data(struct ieee80211_rx_data
*rx
)
1519 struct ieee80211_local
*local
;
1520 struct ieee80211_hdr
*hdr
;
1521 struct sk_buff
*skb
;
1525 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1527 if (!local
->pspolling
)
1530 if (!ieee80211_has_fromds(hdr
->frame_control
))
1531 /* this is not from AP */
1534 if (!ieee80211_is_data(hdr
->frame_control
))
1537 if (!ieee80211_has_moredata(hdr
->frame_control
)) {
1538 /* AP has no more frames buffered for us */
1539 local
->pspolling
= false;
1543 /* more data bit is set, let's request a new frame from the AP */
1544 ieee80211_send_pspoll(local
, rx
->sdata
);
1549 static void sta_ps_start(struct sta_info
*sta
)
1551 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1552 struct ieee80211_local
*local
= sdata
->local
;
1556 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1557 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1558 ps
= &sdata
->bss
->ps
;
1562 atomic_inc(&ps
->num_sta_ps
);
1563 set_sta_flag(sta
, WLAN_STA_PS_STA
);
1564 if (!ieee80211_hw_check(&local
->hw
, AP_LINK_PS
))
1565 drv_sta_notify(local
, sdata
, STA_NOTIFY_SLEEP
, &sta
->sta
);
1566 ps_dbg(sdata
, "STA %pM aid %d enters power save mode\n",
1567 sta
->sta
.addr
, sta
->sta
.aid
);
1569 ieee80211_clear_fast_xmit(sta
);
1571 if (!sta
->sta
.txq
[0])
1574 for (tid
= 0; tid
< IEEE80211_NUM_TIDS
; tid
++) {
1575 struct ieee80211_txq
*txq
= sta
->sta
.txq
[tid
];
1576 struct txq_info
*txqi
= to_txq_info(txq
);
1578 spin_lock(&local
->active_txq_lock
[txq
->ac
]);
1579 if (!list_empty(&txqi
->schedule_order
))
1580 list_del_init(&txqi
->schedule_order
);
1581 spin_unlock(&local
->active_txq_lock
[txq
->ac
]);
1583 if (txq_has_queue(txq
))
1584 set_bit(tid
, &sta
->txq_buffered_tids
);
1586 clear_bit(tid
, &sta
->txq_buffered_tids
);
1590 static void sta_ps_end(struct sta_info
*sta
)
1592 ps_dbg(sta
->sdata
, "STA %pM aid %d exits power save mode\n",
1593 sta
->sta
.addr
, sta
->sta
.aid
);
1595 if (test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) {
1597 * Clear the flag only if the other one is still set
1598 * so that the TX path won't start TX'ing new frames
1599 * directly ... In the case that the driver flag isn't
1600 * set ieee80211_sta_ps_deliver_wakeup() will clear it.
1602 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
1603 ps_dbg(sta
->sdata
, "STA %pM aid %d driver-ps-blocked\n",
1604 sta
->sta
.addr
, sta
->sta
.aid
);
1608 set_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1609 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
1610 ieee80211_sta_ps_deliver_wakeup(sta
);
1613 int ieee80211_sta_ps_transition(struct ieee80211_sta
*pubsta
, bool start
)
1615 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1618 WARN_ON(!ieee80211_hw_check(&sta
->local
->hw
, AP_LINK_PS
));
1620 /* Don't let the same PS state be set twice */
1621 in_ps
= test_sta_flag(sta
, WLAN_STA_PS_STA
);
1622 if ((start
&& in_ps
) || (!start
&& !in_ps
))
1632 EXPORT_SYMBOL(ieee80211_sta_ps_transition
);
1634 void ieee80211_sta_pspoll(struct ieee80211_sta
*pubsta
)
1636 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1638 if (test_sta_flag(sta
, WLAN_STA_SP
))
1641 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1642 ieee80211_sta_ps_deliver_poll_response(sta
);
1644 set_sta_flag(sta
, WLAN_STA_PSPOLL
);
1646 EXPORT_SYMBOL(ieee80211_sta_pspoll
);
1648 void ieee80211_sta_uapsd_trigger(struct ieee80211_sta
*pubsta
, u8 tid
)
1650 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1651 int ac
= ieee80211_ac_from_tid(tid
);
1654 * If this AC is not trigger-enabled do nothing unless the
1655 * driver is calling us after it already checked.
1657 * NB: This could/should check a separate bitmap of trigger-
1658 * enabled queues, but for now we only implement uAPSD w/o
1659 * TSPEC changes to the ACs, so they're always the same.
1661 if (!(sta
->sta
.uapsd_queues
& ieee80211_ac_to_qos_mask
[ac
]) &&
1662 tid
!= IEEE80211_NUM_TIDS
)
1665 /* if we are in a service period, do nothing */
1666 if (test_sta_flag(sta
, WLAN_STA_SP
))
1669 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1670 ieee80211_sta_ps_deliver_uapsd(sta
);
1672 set_sta_flag(sta
, WLAN_STA_UAPSD
);
1674 EXPORT_SYMBOL(ieee80211_sta_uapsd_trigger
);
1676 static ieee80211_rx_result debug_noinline
1677 ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data
*rx
)
1679 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1680 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
1681 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1686 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
1687 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
)
1691 * The device handles station powersave, so don't do anything about
1692 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1693 * it to mac80211 since they're handled.)
1695 if (ieee80211_hw_check(&sdata
->local
->hw
, AP_LINK_PS
))
1699 * Don't do anything if the station isn't already asleep. In
1700 * the uAPSD case, the station will probably be marked asleep,
1701 * in the PS-Poll case the station must be confused ...
1703 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_STA
))
1706 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
))) {
1707 ieee80211_sta_pspoll(&rx
->sta
->sta
);
1709 /* Free PS Poll skb here instead of returning RX_DROP that would
1710 * count as an dropped frame. */
1711 dev_kfree_skb(rx
->skb
);
1714 } else if (!ieee80211_has_morefrags(hdr
->frame_control
) &&
1715 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1716 ieee80211_has_pm(hdr
->frame_control
) &&
1717 (ieee80211_is_data_qos(hdr
->frame_control
) ||
1718 ieee80211_is_qos_nullfunc(hdr
->frame_control
))) {
1719 u8 tid
= ieee80211_get_tid(hdr
);
1721 ieee80211_sta_uapsd_trigger(&rx
->sta
->sta
, tid
);
1727 static ieee80211_rx_result debug_noinline
1728 ieee80211_rx_h_sta_process(struct ieee80211_rx_data
*rx
)
1730 struct sta_info
*sta
= rx
->sta
;
1731 struct sk_buff
*skb
= rx
->skb
;
1732 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1733 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1740 * Update last_rx only for IBSS packets which are for the current
1741 * BSSID and for station already AUTHORIZED to avoid keeping the
1742 * current IBSS network alive in cases where other STAs start
1743 * using different BSSID. This will also give the station another
1744 * chance to restart the authentication/authorization in case
1745 * something went wrong the first time.
1747 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
1748 u8
*bssid
= ieee80211_get_bssid(hdr
, rx
->skb
->len
,
1749 NL80211_IFTYPE_ADHOC
);
1750 if (ether_addr_equal(bssid
, rx
->sdata
->u
.ibss
.bssid
) &&
1751 test_sta_flag(sta
, WLAN_STA_AUTHORIZED
)) {
1752 sta
->rx_stats
.last_rx
= jiffies
;
1753 if (ieee80211_is_data(hdr
->frame_control
) &&
1754 !is_multicast_ether_addr(hdr
->addr1
))
1755 sta
->rx_stats
.last_rate
=
1756 sta_stats_encode_rate(status
);
1758 } else if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_OCB
) {
1759 sta
->rx_stats
.last_rx
= jiffies
;
1760 } else if (!ieee80211_is_s1g_beacon(hdr
->frame_control
) &&
1761 is_multicast_ether_addr(hdr
->addr1
)) {
1763 * Mesh beacons will update last_rx when if they are found to
1764 * match the current local configuration when processed.
1766 sta
->rx_stats
.last_rx
= jiffies
;
1767 if (ieee80211_is_data(hdr
->frame_control
))
1768 sta
->rx_stats
.last_rate
= sta_stats_encode_rate(status
);
1771 sta
->rx_stats
.fragments
++;
1773 u64_stats_update_begin(&rx
->sta
->rx_stats
.syncp
);
1774 sta
->rx_stats
.bytes
+= rx
->skb
->len
;
1775 u64_stats_update_end(&rx
->sta
->rx_stats
.syncp
);
1777 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
1778 sta
->rx_stats
.last_signal
= status
->signal
;
1779 ewma_signal_add(&sta
->rx_stats_avg
.signal
, -status
->signal
);
1782 if (status
->chains
) {
1783 sta
->rx_stats
.chains
= status
->chains
;
1784 for (i
= 0; i
< ARRAY_SIZE(status
->chain_signal
); i
++) {
1785 int signal
= status
->chain_signal
[i
];
1787 if (!(status
->chains
& BIT(i
)))
1790 sta
->rx_stats
.chain_signal_last
[i
] = signal
;
1791 ewma_signal_add(&sta
->rx_stats_avg
.chain_signal
[i
],
1796 if (ieee80211_is_s1g_beacon(hdr
->frame_control
))
1800 * Change STA power saving mode only at the end of a frame
1801 * exchange sequence, and only for a data or management
1802 * frame as specified in IEEE 802.11-2016 11.2.3.2
1804 if (!ieee80211_hw_check(&sta
->local
->hw
, AP_LINK_PS
) &&
1805 !ieee80211_has_morefrags(hdr
->frame_control
) &&
1806 !is_multicast_ether_addr(hdr
->addr1
) &&
1807 (ieee80211_is_mgmt(hdr
->frame_control
) ||
1808 ieee80211_is_data(hdr
->frame_control
)) &&
1809 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1810 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1811 rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)) {
1812 if (test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1813 if (!ieee80211_has_pm(hdr
->frame_control
))
1816 if (ieee80211_has_pm(hdr
->frame_control
))
1821 /* mesh power save support */
1822 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1823 ieee80211_mps_rx_h_sta_process(sta
, hdr
);
1826 * Drop (qos-)data::nullfunc frames silently, since they
1827 * are used only to control station power saving mode.
1829 if (ieee80211_is_any_nullfunc(hdr
->frame_control
)) {
1830 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_nullfunc
);
1833 * If we receive a 4-addr nullfunc frame from a STA
1834 * that was not moved to a 4-addr STA vlan yet send
1835 * the event to userspace and for older hostapd drop
1836 * the frame to the monitor interface.
1838 if (ieee80211_has_a4(hdr
->frame_control
) &&
1839 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1840 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1841 !rx
->sdata
->u
.vlan
.sta
))) {
1842 if (!test_and_set_sta_flag(sta
, WLAN_STA_4ADDR_EVENT
))
1843 cfg80211_rx_unexpected_4addr_frame(
1844 rx
->sdata
->dev
, sta
->sta
.addr
,
1846 return RX_DROP_MONITOR
;
1849 * Update counter and free packet here to avoid
1850 * counting this as a dropped packed.
1852 sta
->rx_stats
.packets
++;
1853 dev_kfree_skb(rx
->skb
);
1858 } /* ieee80211_rx_h_sta_process */
1860 static struct ieee80211_key
*
1861 ieee80211_rx_get_bigtk(struct ieee80211_rx_data
*rx
, int idx
)
1863 struct ieee80211_key
*key
= NULL
;
1864 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1867 /* Make sure key gets set if either BIGTK key index is set so that
1868 * ieee80211_drop_unencrypted_mgmt() can properly drop both unprotected
1869 * Beacon frames and Beacon frames that claim to use another BIGTK key
1870 * index (i.e., a key that we do not have).
1874 idx
= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
;
1877 if (idx
== NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
)
1884 key
= rcu_dereference(rx
->sta
->gtk
[idx
]);
1886 key
= rcu_dereference(sdata
->keys
[idx
]);
1887 if (!key
&& rx
->sta
)
1888 key
= rcu_dereference(rx
->sta
->gtk
[idx2
]);
1890 key
= rcu_dereference(sdata
->keys
[idx2
]);
1895 static ieee80211_rx_result debug_noinline
1896 ieee80211_rx_h_decrypt(struct ieee80211_rx_data
*rx
)
1898 struct sk_buff
*skb
= rx
->skb
;
1899 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1900 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1902 ieee80211_rx_result result
= RX_DROP_UNUSABLE
;
1903 struct ieee80211_key
*sta_ptk
= NULL
;
1904 struct ieee80211_key
*ptk_idx
= NULL
;
1905 int mmie_keyidx
= -1;
1907 const struct ieee80211_cipher_scheme
*cs
= NULL
;
1909 if (ieee80211_is_ext(hdr
->frame_control
))
1915 * There are five types of keys:
1916 * - GTK (group keys)
1917 * - IGTK (group keys for management frames)
1918 * - BIGTK (group keys for Beacon frames)
1919 * - PTK (pairwise keys)
1920 * - STK (station-to-station pairwise keys)
1922 * When selecting a key, we have to distinguish between multicast
1923 * (including broadcast) and unicast frames, the latter can only
1924 * use PTKs and STKs while the former always use GTKs, IGTKs, and
1925 * BIGTKs. Unless, of course, actual WEP keys ("pre-RSNA") are used,
1926 * then unicast frames can also use key indices like GTKs. Hence, if we
1927 * don't have a PTK/STK we check the key index for a WEP key.
1929 * Note that in a regular BSS, multicast frames are sent by the
1930 * AP only, associated stations unicast the frame to the AP first
1931 * which then multicasts it on their behalf.
1933 * There is also a slight problem in IBSS mode: GTKs are negotiated
1934 * with each station, that is something we don't currently handle.
1935 * The spec seems to expect that one negotiates the same key with
1936 * every station but there's no such requirement; VLANs could be
1940 /* start without a key */
1942 fc
= hdr
->frame_control
;
1945 int keyid
= rx
->sta
->ptk_idx
;
1946 sta_ptk
= rcu_dereference(rx
->sta
->ptk
[keyid
]);
1948 if (ieee80211_has_protected(fc
)) {
1949 cs
= rx
->sta
->cipher_scheme
;
1950 keyid
= ieee80211_get_keyid(rx
->skb
, cs
);
1952 if (unlikely(keyid
< 0))
1953 return RX_DROP_UNUSABLE
;
1955 ptk_idx
= rcu_dereference(rx
->sta
->ptk
[keyid
]);
1959 if (!ieee80211_has_protected(fc
))
1960 mmie_keyidx
= ieee80211_get_mmie_keyidx(rx
->skb
);
1962 if (!is_multicast_ether_addr(hdr
->addr1
) && sta_ptk
) {
1963 rx
->key
= ptk_idx
? ptk_idx
: sta_ptk
;
1964 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1965 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1967 /* Skip decryption if the frame is not protected. */
1968 if (!ieee80211_has_protected(fc
))
1970 } else if (mmie_keyidx
>= 0 && ieee80211_is_beacon(fc
)) {
1971 /* Broadcast/multicast robust management frame / BIP */
1972 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1973 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1976 if (mmie_keyidx
< NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
||
1977 mmie_keyidx
>= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
+
1978 NUM_DEFAULT_BEACON_KEYS
) {
1979 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
1982 return RX_DROP_MONITOR
; /* unexpected BIP keyidx */
1985 rx
->key
= ieee80211_rx_get_bigtk(rx
, mmie_keyidx
);
1987 return RX_CONTINUE
; /* Beacon protection not in use */
1988 } else if (mmie_keyidx
>= 0) {
1989 /* Broadcast/multicast robust management frame / BIP */
1990 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1991 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1994 if (mmie_keyidx
< NUM_DEFAULT_KEYS
||
1995 mmie_keyidx
>= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
)
1996 return RX_DROP_MONITOR
; /* unexpected BIP keyidx */
1998 if (ieee80211_is_group_privacy_action(skb
) &&
1999 test_sta_flag(rx
->sta
, WLAN_STA_MFP
))
2000 return RX_DROP_MONITOR
;
2002 rx
->key
= rcu_dereference(rx
->sta
->gtk
[mmie_keyidx
]);
2005 rx
->key
= rcu_dereference(rx
->sdata
->keys
[mmie_keyidx
]);
2006 } else if (!ieee80211_has_protected(fc
)) {
2008 * The frame was not protected, so skip decryption. However, we
2009 * need to set rx->key if there is a key that could have been
2010 * used so that the frame may be dropped if encryption would
2011 * have been expected.
2013 struct ieee80211_key
*key
= NULL
;
2014 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2017 if (ieee80211_is_beacon(fc
)) {
2018 key
= ieee80211_rx_get_bigtk(rx
, -1);
2019 } else if (ieee80211_is_mgmt(fc
) &&
2020 is_multicast_ether_addr(hdr
->addr1
)) {
2021 key
= rcu_dereference(rx
->sdata
->default_mgmt_key
);
2024 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
2025 key
= rcu_dereference(rx
->sta
->gtk
[i
]);
2031 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
2032 key
= rcu_dereference(sdata
->keys
[i
]);
2043 * The device doesn't give us the IV so we won't be
2044 * able to look up the key. That's ok though, we
2045 * don't need to decrypt the frame, we just won't
2046 * be able to keep statistics accurate.
2047 * Except for key threshold notifications, should
2048 * we somehow allow the driver to tell us which key
2049 * the hardware used if this flag is set?
2051 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
2052 (status
->flag
& RX_FLAG_IV_STRIPPED
))
2055 keyidx
= ieee80211_get_keyid(rx
->skb
, cs
);
2057 if (unlikely(keyidx
< 0))
2058 return RX_DROP_UNUSABLE
;
2060 /* check per-station GTK first, if multicast packet */
2061 if (is_multicast_ether_addr(hdr
->addr1
) && rx
->sta
)
2062 rx
->key
= rcu_dereference(rx
->sta
->gtk
[keyidx
]);
2064 /* if not found, try default key */
2066 rx
->key
= rcu_dereference(rx
->sdata
->keys
[keyidx
]);
2069 * RSNA-protected unicast frames should always be
2070 * sent with pairwise or station-to-station keys,
2071 * but for WEP we allow using a key index as well.
2074 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP40
&&
2075 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP104
&&
2076 !is_multicast_ether_addr(hdr
->addr1
))
2082 if (unlikely(rx
->key
->flags
& KEY_FLAG_TAINTED
))
2083 return RX_DROP_MONITOR
;
2085 /* TODO: add threshold stuff again */
2087 return RX_DROP_MONITOR
;
2090 switch (rx
->key
->conf
.cipher
) {
2091 case WLAN_CIPHER_SUITE_WEP40
:
2092 case WLAN_CIPHER_SUITE_WEP104
:
2093 result
= ieee80211_crypto_wep_decrypt(rx
);
2095 case WLAN_CIPHER_SUITE_TKIP
:
2096 result
= ieee80211_crypto_tkip_decrypt(rx
);
2098 case WLAN_CIPHER_SUITE_CCMP
:
2099 result
= ieee80211_crypto_ccmp_decrypt(
2100 rx
, IEEE80211_CCMP_MIC_LEN
);
2102 case WLAN_CIPHER_SUITE_CCMP_256
:
2103 result
= ieee80211_crypto_ccmp_decrypt(
2104 rx
, IEEE80211_CCMP_256_MIC_LEN
);
2106 case WLAN_CIPHER_SUITE_AES_CMAC
:
2107 result
= ieee80211_crypto_aes_cmac_decrypt(rx
);
2109 case WLAN_CIPHER_SUITE_BIP_CMAC_256
:
2110 result
= ieee80211_crypto_aes_cmac_256_decrypt(rx
);
2112 case WLAN_CIPHER_SUITE_BIP_GMAC_128
:
2113 case WLAN_CIPHER_SUITE_BIP_GMAC_256
:
2114 result
= ieee80211_crypto_aes_gmac_decrypt(rx
);
2116 case WLAN_CIPHER_SUITE_GCMP
:
2117 case WLAN_CIPHER_SUITE_GCMP_256
:
2118 result
= ieee80211_crypto_gcmp_decrypt(rx
);
2121 result
= ieee80211_crypto_hw_decrypt(rx
);
2124 /* the hdr variable is invalid after the decrypt handlers */
2126 /* either the frame has been decrypted or will be dropped */
2127 status
->flag
|= RX_FLAG_DECRYPTED
;
2129 if (unlikely(ieee80211_is_beacon(fc
) && result
== RX_DROP_UNUSABLE
))
2130 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2131 skb
->data
, skb
->len
);
2136 static inline struct ieee80211_fragment_entry
*
2137 ieee80211_reassemble_add(struct ieee80211_sub_if_data
*sdata
,
2138 unsigned int frag
, unsigned int seq
, int rx_queue
,
2139 struct sk_buff
**skb
)
2141 struct ieee80211_fragment_entry
*entry
;
2143 entry
= &sdata
->fragments
[sdata
->fragment_next
++];
2144 if (sdata
->fragment_next
>= IEEE80211_FRAGMENT_MAX
)
2145 sdata
->fragment_next
= 0;
2147 if (!skb_queue_empty(&entry
->skb_list
))
2148 __skb_queue_purge(&entry
->skb_list
);
2150 __skb_queue_tail(&entry
->skb_list
, *skb
); /* no need for locking */
2152 entry
->first_frag_time
= jiffies
;
2154 entry
->rx_queue
= rx_queue
;
2155 entry
->last_frag
= frag
;
2156 entry
->check_sequential_pn
= false;
2157 entry
->extra_len
= 0;
2162 static inline struct ieee80211_fragment_entry
*
2163 ieee80211_reassemble_find(struct ieee80211_sub_if_data
*sdata
,
2164 unsigned int frag
, unsigned int seq
,
2165 int rx_queue
, struct ieee80211_hdr
*hdr
)
2167 struct ieee80211_fragment_entry
*entry
;
2170 idx
= sdata
->fragment_next
;
2171 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++) {
2172 struct ieee80211_hdr
*f_hdr
;
2173 struct sk_buff
*f_skb
;
2177 idx
= IEEE80211_FRAGMENT_MAX
- 1;
2179 entry
= &sdata
->fragments
[idx
];
2180 if (skb_queue_empty(&entry
->skb_list
) || entry
->seq
!= seq
||
2181 entry
->rx_queue
!= rx_queue
||
2182 entry
->last_frag
+ 1 != frag
)
2185 f_skb
= __skb_peek(&entry
->skb_list
);
2186 f_hdr
= (struct ieee80211_hdr
*) f_skb
->data
;
2189 * Check ftype and addresses are equal, else check next fragment
2191 if (((hdr
->frame_control
^ f_hdr
->frame_control
) &
2192 cpu_to_le16(IEEE80211_FCTL_FTYPE
)) ||
2193 !ether_addr_equal(hdr
->addr1
, f_hdr
->addr1
) ||
2194 !ether_addr_equal(hdr
->addr2
, f_hdr
->addr2
))
2197 if (time_after(jiffies
, entry
->first_frag_time
+ 2 * HZ
)) {
2198 __skb_queue_purge(&entry
->skb_list
);
2207 static ieee80211_rx_result debug_noinline
2208 ieee80211_rx_h_defragment(struct ieee80211_rx_data
*rx
)
2210 struct ieee80211_hdr
*hdr
;
2213 unsigned int frag
, seq
;
2214 struct ieee80211_fragment_entry
*entry
;
2215 struct sk_buff
*skb
;
2217 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2218 fc
= hdr
->frame_control
;
2220 if (ieee80211_is_ctl(fc
) || ieee80211_is_ext(fc
))
2223 sc
= le16_to_cpu(hdr
->seq_ctrl
);
2224 frag
= sc
& IEEE80211_SCTL_FRAG
;
2226 if (is_multicast_ether_addr(hdr
->addr1
)) {
2227 I802_DEBUG_INC(rx
->local
->dot11MulticastReceivedFrameCount
);
2231 if (likely(!ieee80211_has_morefrags(fc
) && frag
== 0))
2234 I802_DEBUG_INC(rx
->local
->rx_handlers_fragments
);
2236 if (skb_linearize(rx
->skb
))
2237 return RX_DROP_UNUSABLE
;
2240 * skb_linearize() might change the skb->data and
2241 * previously cached variables (in this case, hdr) need to
2242 * be refreshed with the new data.
2244 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2245 seq
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
2248 /* This is the first fragment of a new frame. */
2249 entry
= ieee80211_reassemble_add(rx
->sdata
, frag
, seq
,
2250 rx
->seqno_idx
, &(rx
->skb
));
2252 (rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP
||
2253 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP_256
||
2254 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_GCMP
||
2255 rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_GCMP_256
) &&
2256 ieee80211_has_protected(fc
)) {
2257 int queue
= rx
->security_idx
;
2259 /* Store CCMP/GCMP PN so that we can verify that the
2260 * next fragment has a sequential PN value.
2262 entry
->check_sequential_pn
= true;
2263 memcpy(entry
->last_pn
,
2264 rx
->key
->u
.ccmp
.rx_pn
[queue
],
2265 IEEE80211_CCMP_PN_LEN
);
2266 BUILD_BUG_ON(offsetof(struct ieee80211_key
,
2268 offsetof(struct ieee80211_key
,
2270 BUILD_BUG_ON(sizeof(rx
->key
->u
.ccmp
.rx_pn
[queue
]) !=
2271 sizeof(rx
->key
->u
.gcmp
.rx_pn
[queue
]));
2272 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN
!=
2273 IEEE80211_GCMP_PN_LEN
);
2278 /* This is a fragment for a frame that should already be pending in
2279 * fragment cache. Add this fragment to the end of the pending entry.
2281 entry
= ieee80211_reassemble_find(rx
->sdata
, frag
, seq
,
2282 rx
->seqno_idx
, hdr
);
2284 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
2285 return RX_DROP_MONITOR
;
2288 /* "The receiver shall discard MSDUs and MMPDUs whose constituent
2289 * MPDU PN values are not incrementing in steps of 1."
2290 * see IEEE P802.11-REVmc/D5.0, 12.5.3.4.4, item d (for CCMP)
2291 * and IEEE P802.11-REVmc/D5.0, 12.5.5.4.4, item d (for GCMP)
2293 if (entry
->check_sequential_pn
) {
2295 u8 pn
[IEEE80211_CCMP_PN_LEN
], *rpn
;
2299 (rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_CCMP
&&
2300 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_CCMP_256
&&
2301 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_GCMP
&&
2302 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_GCMP_256
))
2303 return RX_DROP_UNUSABLE
;
2304 memcpy(pn
, entry
->last_pn
, IEEE80211_CCMP_PN_LEN
);
2305 for (i
= IEEE80211_CCMP_PN_LEN
- 1; i
>= 0; i
--) {
2310 queue
= rx
->security_idx
;
2311 rpn
= rx
->key
->u
.ccmp
.rx_pn
[queue
];
2312 if (memcmp(pn
, rpn
, IEEE80211_CCMP_PN_LEN
))
2313 return RX_DROP_UNUSABLE
;
2314 memcpy(entry
->last_pn
, pn
, IEEE80211_CCMP_PN_LEN
);
2317 skb_pull(rx
->skb
, ieee80211_hdrlen(fc
));
2318 __skb_queue_tail(&entry
->skb_list
, rx
->skb
);
2319 entry
->last_frag
= frag
;
2320 entry
->extra_len
+= rx
->skb
->len
;
2321 if (ieee80211_has_morefrags(fc
)) {
2326 rx
->skb
= __skb_dequeue(&entry
->skb_list
);
2327 if (skb_tailroom(rx
->skb
) < entry
->extra_len
) {
2328 I802_DEBUG_INC(rx
->local
->rx_expand_skb_head_defrag
);
2329 if (unlikely(pskb_expand_head(rx
->skb
, 0, entry
->extra_len
,
2331 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
2332 __skb_queue_purge(&entry
->skb_list
);
2333 return RX_DROP_UNUSABLE
;
2336 while ((skb
= __skb_dequeue(&entry
->skb_list
))) {
2337 skb_put_data(rx
->skb
, skb
->data
, skb
->len
);
2342 ieee80211_led_rx(rx
->local
);
2345 rx
->sta
->rx_stats
.packets
++;
2349 static int ieee80211_802_1x_port_control(struct ieee80211_rx_data
*rx
)
2351 if (unlikely(!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_AUTHORIZED
)))
2357 static int ieee80211_drop_unencrypted(struct ieee80211_rx_data
*rx
, __le16 fc
)
2359 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
2360 struct sk_buff
*skb
= rx
->skb
;
2361 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2364 * Pass through unencrypted frames if the hardware has
2365 * decrypted them already.
2367 if (status
->flag
& RX_FLAG_DECRYPTED
)
2370 /* check mesh EAPOL frames first */
2371 if (unlikely(rx
->sta
&& ieee80211_vif_is_mesh(&rx
->sdata
->vif
) &&
2372 ieee80211_is_data(fc
))) {
2373 struct ieee80211s_hdr
*mesh_hdr
;
2374 u16 hdr_len
= ieee80211_hdrlen(fc
);
2375 u16 ethertype_offset
;
2378 if (!ether_addr_equal(hdr
->addr1
, rx
->sdata
->vif
.addr
))
2381 /* make sure fixed part of mesh header is there, also checks skb len */
2382 if (!pskb_may_pull(rx
->skb
, hdr_len
+ 6))
2385 mesh_hdr
= (struct ieee80211s_hdr
*)(skb
->data
+ hdr_len
);
2386 ethertype_offset
= hdr_len
+ ieee80211_get_mesh_hdrlen(mesh_hdr
) +
2387 sizeof(rfc1042_header
);
2389 if (skb_copy_bits(rx
->skb
, ethertype_offset
, ðertype
, 2) == 0 &&
2390 ethertype
== rx
->sdata
->control_port_protocol
)
2395 /* Drop unencrypted frames if key is set. */
2396 if (unlikely(!ieee80211_has_protected(fc
) &&
2397 !ieee80211_is_any_nullfunc(fc
) &&
2398 ieee80211_is_data(fc
) && rx
->key
))
2404 static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data
*rx
)
2406 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2407 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2408 __le16 fc
= hdr
->frame_control
;
2411 * Pass through unencrypted frames if the hardware has
2412 * decrypted them already.
2414 if (status
->flag
& RX_FLAG_DECRYPTED
)
2417 if (rx
->sta
&& test_sta_flag(rx
->sta
, WLAN_STA_MFP
)) {
2418 if (unlikely(!ieee80211_has_protected(fc
) &&
2419 ieee80211_is_unicast_robust_mgmt_frame(rx
->skb
) &&
2421 if (ieee80211_is_deauth(fc
) ||
2422 ieee80211_is_disassoc(fc
))
2423 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2428 /* BIP does not use Protected field, so need to check MMIE */
2429 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx
->skb
) &&
2430 ieee80211_get_mmie_keyidx(rx
->skb
) < 0)) {
2431 if (ieee80211_is_deauth(fc
) ||
2432 ieee80211_is_disassoc(fc
))
2433 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2438 if (unlikely(ieee80211_is_beacon(fc
) && rx
->key
&&
2439 ieee80211_get_mmie_keyidx(rx
->skb
) < 0)) {
2440 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
2446 * When using MFP, Action frames are not allowed prior to
2447 * having configured keys.
2449 if (unlikely(ieee80211_is_action(fc
) && !rx
->key
&&
2450 ieee80211_is_robust_mgmt_frame(rx
->skb
)))
2458 __ieee80211_data_to_8023(struct ieee80211_rx_data
*rx
, bool *port_control
)
2460 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2461 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2462 bool check_port_control
= false;
2463 struct ethhdr
*ehdr
;
2466 *port_control
= false;
2467 if (ieee80211_has_a4(hdr
->frame_control
) &&
2468 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& !sdata
->u
.vlan
.sta
)
2471 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
2472 !!sdata
->u
.mgd
.use_4addr
!= !!ieee80211_has_a4(hdr
->frame_control
)) {
2474 if (!sdata
->u
.mgd
.use_4addr
)
2476 else if (!ether_addr_equal(hdr
->addr1
, sdata
->vif
.addr
))
2477 check_port_control
= true;
2480 if (is_multicast_ether_addr(hdr
->addr1
) &&
2481 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& sdata
->u
.vlan
.sta
)
2484 ret
= ieee80211_data_to_8023(rx
->skb
, sdata
->vif
.addr
, sdata
->vif
.type
);
2488 ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2489 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
)
2490 *port_control
= true;
2491 else if (check_port_control
)
2498 * requires that rx->skb is a frame with ethernet header
2500 static bool ieee80211_frame_allowed(struct ieee80211_rx_data
*rx
, __le16 fc
)
2502 static const u8 pae_group_addr
[ETH_ALEN
] __aligned(2)
2503 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
2504 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2507 * Allow EAPOL frames to us/the PAE group address regardless
2508 * of whether the frame was encrypted or not.
2510 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
&&
2511 (ether_addr_equal(ehdr
->h_dest
, rx
->sdata
->vif
.addr
) ||
2512 ether_addr_equal(ehdr
->h_dest
, pae_group_addr
)))
2515 if (ieee80211_802_1x_port_control(rx
) ||
2516 ieee80211_drop_unencrypted(rx
, fc
))
2522 static void ieee80211_deliver_skb_to_local_stack(struct sk_buff
*skb
,
2523 struct ieee80211_rx_data
*rx
)
2525 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2526 struct net_device
*dev
= sdata
->dev
;
2528 if (unlikely((skb
->protocol
== sdata
->control_port_protocol
||
2529 (skb
->protocol
== cpu_to_be16(ETH_P_PREAUTH
) &&
2530 !sdata
->control_port_no_preauth
)) &&
2531 sdata
->control_port_over_nl80211
)) {
2532 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2533 bool noencrypt
= !(status
->flag
& RX_FLAG_DECRYPTED
);
2535 cfg80211_rx_control_port(dev
, skb
, noencrypt
);
2538 memset(skb
->cb
, 0, sizeof(skb
->cb
));
2540 /* deliver to local stack */
2542 list_add_tail(&skb
->list
, rx
->list
);
2544 netif_receive_skb(skb
);
2549 * requires that rx->skb is a frame with ethernet header
2552 ieee80211_deliver_skb(struct ieee80211_rx_data
*rx
)
2554 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2555 struct net_device
*dev
= sdata
->dev
;
2556 struct sk_buff
*skb
, *xmit_skb
;
2557 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
2558 struct sta_info
*dsta
;
2563 ieee80211_rx_stats(dev
, skb
->len
);
2566 /* The seqno index has the same property as needed
2567 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
2568 * for non-QoS-data frames. Here we know it's a data
2569 * frame, so count MSDUs.
2571 u64_stats_update_begin(&rx
->sta
->rx_stats
.syncp
);
2572 rx
->sta
->rx_stats
.msdu
[rx
->seqno_idx
]++;
2573 u64_stats_update_end(&rx
->sta
->rx_stats
.syncp
);
2576 if ((sdata
->vif
.type
== NL80211_IFTYPE_AP
||
2577 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) &&
2578 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
2579 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
|| !sdata
->u
.vlan
.sta
)) {
2580 if (is_multicast_ether_addr(ehdr
->h_dest
) &&
2581 ieee80211_vif_get_num_mcast_if(sdata
) != 0) {
2583 * send multicast frames both to higher layers in
2584 * local net stack and back to the wireless medium
2586 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
2588 net_info_ratelimited("%s: failed to clone multicast frame\n",
2590 } else if (!is_multicast_ether_addr(ehdr
->h_dest
) &&
2591 !ether_addr_equal(ehdr
->h_dest
, ehdr
->h_source
)) {
2592 dsta
= sta_info_get(sdata
, ehdr
->h_dest
);
2595 * The destination station is associated to
2596 * this AP (in this VLAN), so send the frame
2597 * directly to it and do not pass it to local
2606 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
2608 /* 'align' will only take the values 0 or 2 here since all
2609 * frames are required to be aligned to 2-byte boundaries
2610 * when being passed to mac80211; the code here works just
2611 * as well if that isn't true, but mac80211 assumes it can
2612 * access fields as 2-byte aligned (e.g. for ether_addr_equal)
2616 align
= (unsigned long)(skb
->data
+ sizeof(struct ethhdr
)) & 3;
2618 if (WARN_ON(skb_headroom(skb
) < 3)) {
2622 u8
*data
= skb
->data
;
2623 size_t len
= skb_headlen(skb
);
2625 memmove(skb
->data
, data
, len
);
2626 skb_set_tail_pointer(skb
, len
);
2633 skb
->protocol
= eth_type_trans(skb
, dev
);
2634 ieee80211_deliver_skb_to_local_stack(skb
, rx
);
2639 * Send to wireless media and increase priority by 256 to
2640 * keep the received priority instead of reclassifying
2641 * the frame (see cfg80211_classify8021d).
2643 xmit_skb
->priority
+= 256;
2644 xmit_skb
->protocol
= htons(ETH_P_802_3
);
2645 skb_reset_network_header(xmit_skb
);
2646 skb_reset_mac_header(xmit_skb
);
2647 dev_queue_xmit(xmit_skb
);
2651 static ieee80211_rx_result debug_noinline
2652 __ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
, u8 data_offset
)
2654 struct net_device
*dev
= rx
->sdata
->dev
;
2655 struct sk_buff
*skb
= rx
->skb
;
2656 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
2657 __le16 fc
= hdr
->frame_control
;
2658 struct sk_buff_head frame_list
;
2659 struct ethhdr ethhdr
;
2660 const u8
*check_da
= ethhdr
.h_dest
, *check_sa
= ethhdr
.h_source
;
2662 if (unlikely(ieee80211_has_a4(hdr
->frame_control
))) {
2665 } else switch (rx
->sdata
->vif
.type
) {
2666 case NL80211_IFTYPE_AP
:
2667 case NL80211_IFTYPE_AP_VLAN
:
2670 case NL80211_IFTYPE_STATION
:
2672 !test_sta_flag(rx
->sta
, WLAN_STA_TDLS_PEER
))
2675 case NL80211_IFTYPE_MESH_POINT
:
2683 __skb_queue_head_init(&frame_list
);
2685 if (ieee80211_data_to_8023_exthdr(skb
, ðhdr
,
2686 rx
->sdata
->vif
.addr
,
2687 rx
->sdata
->vif
.type
,
2689 return RX_DROP_UNUSABLE
;
2691 ieee80211_amsdu_to_8023s(skb
, &frame_list
, dev
->dev_addr
,
2692 rx
->sdata
->vif
.type
,
2693 rx
->local
->hw
.extra_tx_headroom
,
2694 check_da
, check_sa
);
2696 while (!skb_queue_empty(&frame_list
)) {
2697 rx
->skb
= __skb_dequeue(&frame_list
);
2699 if (!ieee80211_frame_allowed(rx
, fc
)) {
2700 dev_kfree_skb(rx
->skb
);
2704 ieee80211_deliver_skb(rx
);
2710 static ieee80211_rx_result debug_noinline
2711 ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
)
2713 struct sk_buff
*skb
= rx
->skb
;
2714 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2715 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
2716 __le16 fc
= hdr
->frame_control
;
2718 if (!(status
->rx_flags
& IEEE80211_RX_AMSDU
))
2721 if (unlikely(!ieee80211_is_data(fc
)))
2724 if (unlikely(!ieee80211_is_data_present(fc
)))
2725 return RX_DROP_MONITOR
;
2727 if (unlikely(ieee80211_has_a4(hdr
->frame_control
))) {
2728 switch (rx
->sdata
->vif
.type
) {
2729 case NL80211_IFTYPE_AP_VLAN
:
2730 if (!rx
->sdata
->u
.vlan
.sta
)
2731 return RX_DROP_UNUSABLE
;
2733 case NL80211_IFTYPE_STATION
:
2734 if (!rx
->sdata
->u
.mgd
.use_4addr
)
2735 return RX_DROP_UNUSABLE
;
2738 return RX_DROP_UNUSABLE
;
2742 if (is_multicast_ether_addr(hdr
->addr1
))
2743 return RX_DROP_UNUSABLE
;
2745 return __ieee80211_rx_h_amsdu(rx
, 0);
2748 #ifdef CONFIG_MAC80211_MESH
2749 static ieee80211_rx_result
2750 ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data
*rx
)
2752 struct ieee80211_hdr
*fwd_hdr
, *hdr
;
2753 struct ieee80211_tx_info
*info
;
2754 struct ieee80211s_hdr
*mesh_hdr
;
2755 struct sk_buff
*skb
= rx
->skb
, *fwd_skb
;
2756 struct ieee80211_local
*local
= rx
->local
;
2757 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2758 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2762 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2763 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
2765 /* make sure fixed part of mesh header is there, also checks skb len */
2766 if (!pskb_may_pull(rx
->skb
, hdrlen
+ 6))
2767 return RX_DROP_MONITOR
;
2769 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2771 /* make sure full mesh header is there, also checks skb len */
2772 if (!pskb_may_pull(rx
->skb
,
2773 hdrlen
+ ieee80211_get_mesh_hdrlen(mesh_hdr
)))
2774 return RX_DROP_MONITOR
;
2776 /* reload pointers */
2777 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2778 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2780 if (ieee80211_drop_unencrypted(rx
, hdr
->frame_control
))
2781 return RX_DROP_MONITOR
;
2783 /* frame is in RMC, don't forward */
2784 if (ieee80211_is_data(hdr
->frame_control
) &&
2785 is_multicast_ether_addr(hdr
->addr1
) &&
2786 mesh_rmc_check(rx
->sdata
, hdr
->addr3
, mesh_hdr
))
2787 return RX_DROP_MONITOR
;
2789 if (!ieee80211_is_data(hdr
->frame_control
))
2793 return RX_DROP_MONITOR
;
2795 if (mesh_hdr
->flags
& MESH_FLAGS_AE
) {
2796 struct mesh_path
*mppath
;
2800 if (is_multicast_ether_addr(hdr
->addr1
)) {
2801 mpp_addr
= hdr
->addr3
;
2802 proxied_addr
= mesh_hdr
->eaddr1
;
2803 } else if ((mesh_hdr
->flags
& MESH_FLAGS_AE
) ==
2804 MESH_FLAGS_AE_A5_A6
) {
2805 /* has_a4 already checked in ieee80211_rx_mesh_check */
2806 mpp_addr
= hdr
->addr4
;
2807 proxied_addr
= mesh_hdr
->eaddr2
;
2809 return RX_DROP_MONITOR
;
2813 mppath
= mpp_path_lookup(sdata
, proxied_addr
);
2815 mpp_path_add(sdata
, proxied_addr
, mpp_addr
);
2817 spin_lock_bh(&mppath
->state_lock
);
2818 if (!ether_addr_equal(mppath
->mpp
, mpp_addr
))
2819 memcpy(mppath
->mpp
, mpp_addr
, ETH_ALEN
);
2820 mppath
->exp_time
= jiffies
;
2821 spin_unlock_bh(&mppath
->state_lock
);
2826 /* Frame has reached destination. Don't forward */
2827 if (!is_multicast_ether_addr(hdr
->addr1
) &&
2828 ether_addr_equal(sdata
->vif
.addr
, hdr
->addr3
))
2831 ac
= ieee80211_select_queue_80211(sdata
, skb
, hdr
);
2832 q
= sdata
->vif
.hw_queue
[ac
];
2833 if (ieee80211_queue_stopped(&local
->hw
, q
)) {
2834 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_congestion
);
2835 return RX_DROP_MONITOR
;
2837 skb_set_queue_mapping(skb
, q
);
2839 if (!--mesh_hdr
->ttl
) {
2840 if (!is_multicast_ether_addr(hdr
->addr1
))
2841 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
,
2842 dropped_frames_ttl
);
2846 if (!ifmsh
->mshcfg
.dot11MeshForwarding
)
2849 if (sdata
->crypto_tx_tailroom_needed_cnt
)
2850 tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
2852 fwd_skb
= skb_copy_expand(skb
, local
->tx_headroom
+
2853 sdata
->encrypt_headroom
,
2854 tailroom
, GFP_ATOMIC
);
2858 fwd_hdr
= (struct ieee80211_hdr
*) fwd_skb
->data
;
2859 fwd_hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_RETRY
);
2860 info
= IEEE80211_SKB_CB(fwd_skb
);
2861 memset(info
, 0, sizeof(*info
));
2862 info
->control
.flags
|= IEEE80211_TX_INTCFL_NEED_TXPROCESSING
;
2863 info
->control
.vif
= &rx
->sdata
->vif
;
2864 info
->control
.jiffies
= jiffies
;
2865 if (is_multicast_ether_addr(fwd_hdr
->addr1
)) {
2866 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_mcast
);
2867 memcpy(fwd_hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2868 /* update power mode indication when forwarding */
2869 ieee80211_mps_set_frame_flags(sdata
, NULL
, fwd_hdr
);
2870 } else if (!mesh_nexthop_lookup(sdata
, fwd_skb
)) {
2871 /* mesh power mode flags updated in mesh_nexthop_lookup */
2872 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_unicast
);
2874 /* unable to resolve next hop */
2875 mesh_path_error_tx(sdata
, ifmsh
->mshcfg
.element_ttl
,
2877 WLAN_REASON_MESH_PATH_NOFORWARD
,
2879 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_no_route
);
2881 return RX_DROP_MONITOR
;
2884 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_frames
);
2885 ieee80211_add_pending_skb(local
, fwd_skb
);
2887 if (is_multicast_ether_addr(hdr
->addr1
))
2889 return RX_DROP_MONITOR
;
2893 static ieee80211_rx_result debug_noinline
2894 ieee80211_rx_h_data(struct ieee80211_rx_data
*rx
)
2896 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2897 struct ieee80211_local
*local
= rx
->local
;
2898 struct net_device
*dev
= sdata
->dev
;
2899 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2900 __le16 fc
= hdr
->frame_control
;
2904 if (unlikely(!ieee80211_is_data(hdr
->frame_control
)))
2907 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
2908 return RX_DROP_MONITOR
;
2911 * Send unexpected-4addr-frame event to hostapd. For older versions,
2912 * also drop the frame to cooked monitor interfaces.
2914 if (ieee80211_has_a4(hdr
->frame_control
) &&
2915 sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2917 !test_and_set_sta_flag(rx
->sta
, WLAN_STA_4ADDR_EVENT
))
2918 cfg80211_rx_unexpected_4addr_frame(
2919 rx
->sdata
->dev
, rx
->sta
->sta
.addr
, GFP_ATOMIC
);
2920 return RX_DROP_MONITOR
;
2923 err
= __ieee80211_data_to_8023(rx
, &port_control
);
2925 return RX_DROP_UNUSABLE
;
2927 if (!ieee80211_frame_allowed(rx
, fc
))
2928 return RX_DROP_MONITOR
;
2930 /* directly handle TDLS channel switch requests/responses */
2931 if (unlikely(((struct ethhdr
*)rx
->skb
->data
)->h_proto
==
2932 cpu_to_be16(ETH_P_TDLS
))) {
2933 struct ieee80211_tdls_data
*tf
= (void *)rx
->skb
->data
;
2935 if (pskb_may_pull(rx
->skb
,
2936 offsetof(struct ieee80211_tdls_data
, u
)) &&
2937 tf
->payload_type
== WLAN_TDLS_SNAP_RFTYPE
&&
2938 tf
->category
== WLAN_CATEGORY_TDLS
&&
2939 (tf
->action_code
== WLAN_TDLS_CHANNEL_SWITCH_REQUEST
||
2940 tf
->action_code
== WLAN_TDLS_CHANNEL_SWITCH_RESPONSE
)) {
2941 skb_queue_tail(&local
->skb_queue_tdls_chsw
, rx
->skb
);
2942 schedule_work(&local
->tdls_chsw_work
);
2944 rx
->sta
->rx_stats
.packets
++;
2950 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
2951 unlikely(port_control
) && sdata
->bss
) {
2952 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
2960 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
) &&
2961 local
->ps_sdata
&& local
->hw
.conf
.dynamic_ps_timeout
> 0 &&
2962 !is_multicast_ether_addr(
2963 ((struct ethhdr
*)rx
->skb
->data
)->h_dest
) &&
2964 (!local
->scanning
&&
2965 !test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
)))
2966 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
2967 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
2969 ieee80211_deliver_skb(rx
);
2974 static ieee80211_rx_result debug_noinline
2975 ieee80211_rx_h_ctrl(struct ieee80211_rx_data
*rx
, struct sk_buff_head
*frames
)
2977 struct sk_buff
*skb
= rx
->skb
;
2978 struct ieee80211_bar
*bar
= (struct ieee80211_bar
*)skb
->data
;
2979 struct tid_ampdu_rx
*tid_agg_rx
;
2983 if (likely(!ieee80211_is_ctl(bar
->frame_control
)))
2986 if (ieee80211_is_back_req(bar
->frame_control
)) {
2988 __le16 control
, start_seq_num
;
2989 } __packed bar_data
;
2990 struct ieee80211_event event
= {
2991 .type
= BAR_RX_EVENT
,
2995 return RX_DROP_MONITOR
;
2997 if (skb_copy_bits(skb
, offsetof(struct ieee80211_bar
, control
),
2998 &bar_data
, sizeof(bar_data
)))
2999 return RX_DROP_MONITOR
;
3001 tid
= le16_to_cpu(bar_data
.control
) >> 12;
3003 if (!test_bit(tid
, rx
->sta
->ampdu_mlme
.agg_session_valid
) &&
3004 !test_and_set_bit(tid
, rx
->sta
->ampdu_mlme
.unexpected_agg
))
3005 ieee80211_send_delba(rx
->sdata
, rx
->sta
->sta
.addr
, tid
,
3006 WLAN_BACK_RECIPIENT
,
3007 WLAN_REASON_QSTA_REQUIRE_SETUP
);
3009 tid_agg_rx
= rcu_dereference(rx
->sta
->ampdu_mlme
.tid_rx
[tid
]);
3011 return RX_DROP_MONITOR
;
3013 start_seq_num
= le16_to_cpu(bar_data
.start_seq_num
) >> 4;
3014 event
.u
.ba
.tid
= tid
;
3015 event
.u
.ba
.ssn
= start_seq_num
;
3016 event
.u
.ba
.sta
= &rx
->sta
->sta
;
3018 /* reset session timer */
3019 if (tid_agg_rx
->timeout
)
3020 mod_timer(&tid_agg_rx
->session_timer
,
3021 TU_TO_EXP_TIME(tid_agg_rx
->timeout
));
3023 spin_lock(&tid_agg_rx
->reorder_lock
);
3024 /* release stored frames up to start of BAR */
3025 ieee80211_release_reorder_frames(rx
->sdata
, tid_agg_rx
,
3026 start_seq_num
, frames
);
3027 spin_unlock(&tid_agg_rx
->reorder_lock
);
3029 drv_event_callback(rx
->local
, rx
->sdata
, &event
);
3036 * After this point, we only want management frames,
3037 * so we can drop all remaining control frames to
3038 * cooked monitor interfaces.
3040 return RX_DROP_MONITOR
;
3043 static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data
*sdata
,
3044 struct ieee80211_mgmt
*mgmt
,
3047 struct ieee80211_local
*local
= sdata
->local
;
3048 struct sk_buff
*skb
;
3049 struct ieee80211_mgmt
*resp
;
3051 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
)) {
3052 /* Not to own unicast address */
3056 if (!ether_addr_equal(mgmt
->sa
, sdata
->u
.mgd
.bssid
) ||
3057 !ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
)) {
3058 /* Not from the current AP or not associated yet. */
3062 if (len
< 24 + 1 + sizeof(resp
->u
.action
.u
.sa_query
)) {
3063 /* Too short SA Query request frame */
3067 skb
= dev_alloc_skb(sizeof(*resp
) + local
->hw
.extra_tx_headroom
);
3071 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
3072 resp
= skb_put_zero(skb
, 24);
3073 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
3074 memcpy(resp
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
3075 memcpy(resp
->bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
3076 resp
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
3077 IEEE80211_STYPE_ACTION
);
3078 skb_put(skb
, 1 + sizeof(resp
->u
.action
.u
.sa_query
));
3079 resp
->u
.action
.category
= WLAN_CATEGORY_SA_QUERY
;
3080 resp
->u
.action
.u
.sa_query
.action
= WLAN_ACTION_SA_QUERY_RESPONSE
;
3081 memcpy(resp
->u
.action
.u
.sa_query
.trans_id
,
3082 mgmt
->u
.action
.u
.sa_query
.trans_id
,
3083 WLAN_SA_QUERY_TR_ID_LEN
);
3085 ieee80211_tx_skb(sdata
, skb
);
3088 static ieee80211_rx_result debug_noinline
3089 ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data
*rx
)
3091 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3092 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3094 if (ieee80211_is_s1g_beacon(mgmt
->frame_control
))
3098 * From here on, look only at management frames.
3099 * Data and control frames are already handled,
3100 * and unknown (reserved) frames are useless.
3102 if (rx
->skb
->len
< 24)
3103 return RX_DROP_MONITOR
;
3105 if (!ieee80211_is_mgmt(mgmt
->frame_control
))
3106 return RX_DROP_MONITOR
;
3108 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
3109 ieee80211_is_beacon(mgmt
->frame_control
) &&
3110 !(rx
->flags
& IEEE80211_RX_BEACON_REPORTED
)) {
3113 if (ieee80211_hw_check(&rx
->local
->hw
, SIGNAL_DBM
) &&
3114 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
))
3115 sig
= status
->signal
;
3117 cfg80211_report_obss_beacon_khz(rx
->local
->hw
.wiphy
,
3118 rx
->skb
->data
, rx
->skb
->len
,
3119 ieee80211_rx_status_to_khz(status
),
3121 rx
->flags
|= IEEE80211_RX_BEACON_REPORTED
;
3124 if (ieee80211_drop_unencrypted_mgmt(rx
))
3125 return RX_DROP_UNUSABLE
;
3130 static ieee80211_rx_result debug_noinline
3131 ieee80211_rx_h_action(struct ieee80211_rx_data
*rx
)
3133 struct ieee80211_local
*local
= rx
->local
;
3134 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3135 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3136 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3137 int len
= rx
->skb
->len
;
3139 if (!ieee80211_is_action(mgmt
->frame_control
))
3142 /* drop too small frames */
3143 if (len
< IEEE80211_MIN_ACTION_SIZE
)
3144 return RX_DROP_UNUSABLE
;
3146 if (!rx
->sta
&& mgmt
->u
.action
.category
!= WLAN_CATEGORY_PUBLIC
&&
3147 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SELF_PROTECTED
&&
3148 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SPECTRUM_MGMT
)
3149 return RX_DROP_UNUSABLE
;
3151 switch (mgmt
->u
.action
.category
) {
3152 case WLAN_CATEGORY_HT
:
3153 /* reject HT action frames from stations not supporting HT */
3154 if (!rx
->sta
->sta
.ht_cap
.ht_supported
)
3157 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3158 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3159 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3160 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3161 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3164 /* verify action & smps_control/chanwidth are present */
3165 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
3168 switch (mgmt
->u
.action
.u
.ht_smps
.action
) {
3169 case WLAN_HT_ACTION_SMPS
: {
3170 struct ieee80211_supported_band
*sband
;
3171 enum ieee80211_smps_mode smps_mode
;
3172 struct sta_opmode_info sta_opmode
= {};
3174 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3175 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
)
3178 /* convert to HT capability */
3179 switch (mgmt
->u
.action
.u
.ht_smps
.smps_control
) {
3180 case WLAN_HT_SMPS_CONTROL_DISABLED
:
3181 smps_mode
= IEEE80211_SMPS_OFF
;
3183 case WLAN_HT_SMPS_CONTROL_STATIC
:
3184 smps_mode
= IEEE80211_SMPS_STATIC
;
3186 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
3187 smps_mode
= IEEE80211_SMPS_DYNAMIC
;
3193 /* if no change do nothing */
3194 if (rx
->sta
->sta
.smps_mode
== smps_mode
)
3196 rx
->sta
->sta
.smps_mode
= smps_mode
;
3197 sta_opmode
.smps_mode
=
3198 ieee80211_smps_mode_to_smps_mode(smps_mode
);
3199 sta_opmode
.changed
= STA_OPMODE_SMPS_MODE_CHANGED
;
3201 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3203 rate_control_rate_update(local
, sband
, rx
->sta
,
3204 IEEE80211_RC_SMPS_CHANGED
);
3205 cfg80211_sta_opmode_change_notify(sdata
->dev
,
3211 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH
: {
3212 struct ieee80211_supported_band
*sband
;
3213 u8 chanwidth
= mgmt
->u
.action
.u
.ht_notify_cw
.chanwidth
;
3214 enum ieee80211_sta_rx_bandwidth max_bw
, new_bw
;
3215 struct sta_opmode_info sta_opmode
= {};
3217 /* If it doesn't support 40 MHz it can't change ... */
3218 if (!(rx
->sta
->sta
.ht_cap
.cap
&
3219 IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
3222 if (chanwidth
== IEEE80211_HT_CHANWIDTH_20MHZ
)
3223 max_bw
= IEEE80211_STA_RX_BW_20
;
3225 max_bw
= ieee80211_sta_cap_rx_bw(rx
->sta
);
3227 /* set cur_max_bandwidth and recalc sta bw */
3228 rx
->sta
->cur_max_bandwidth
= max_bw
;
3229 new_bw
= ieee80211_sta_cur_vht_bw(rx
->sta
);
3231 if (rx
->sta
->sta
.bandwidth
== new_bw
)
3234 rx
->sta
->sta
.bandwidth
= new_bw
;
3235 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3237 ieee80211_sta_rx_bw_to_chan_width(rx
->sta
);
3238 sta_opmode
.changed
= STA_OPMODE_MAX_BW_CHANGED
;
3240 rate_control_rate_update(local
, sband
, rx
->sta
,
3241 IEEE80211_RC_BW_CHANGED
);
3242 cfg80211_sta_opmode_change_notify(sdata
->dev
,
3253 case WLAN_CATEGORY_PUBLIC
:
3254 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3256 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3260 if (!ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
))
3262 if (mgmt
->u
.action
.u
.ext_chan_switch
.action_code
!=
3263 WLAN_PUB_ACTION_EXT_CHANSW_ANN
)
3265 if (len
< offsetof(struct ieee80211_mgmt
,
3266 u
.action
.u
.ext_chan_switch
.variable
))
3269 case WLAN_CATEGORY_VHT
:
3270 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3271 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3272 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3273 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3274 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3277 /* verify action code is present */
3278 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3281 switch (mgmt
->u
.action
.u
.vht_opmode_notif
.action_code
) {
3282 case WLAN_VHT_ACTION_OPMODE_NOTIF
: {
3283 /* verify opmode is present */
3284 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
3288 case WLAN_VHT_ACTION_GROUPID_MGMT
: {
3289 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 25)
3297 case WLAN_CATEGORY_BACK
:
3298 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3299 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
3300 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
3301 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
3302 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3305 /* verify action_code is present */
3306 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3309 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
3310 case WLAN_ACTION_ADDBA_REQ
:
3311 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3312 sizeof(mgmt
->u
.action
.u
.addba_req
)))
3315 case WLAN_ACTION_ADDBA_RESP
:
3316 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3317 sizeof(mgmt
->u
.action
.u
.addba_resp
)))
3320 case WLAN_ACTION_DELBA
:
3321 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3322 sizeof(mgmt
->u
.action
.u
.delba
)))
3330 case WLAN_CATEGORY_SPECTRUM_MGMT
:
3331 /* verify action_code is present */
3332 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
3335 switch (mgmt
->u
.action
.u
.measurement
.action_code
) {
3336 case WLAN_ACTION_SPCT_MSR_REQ
:
3337 if (status
->band
!= NL80211_BAND_5GHZ
)
3340 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3341 sizeof(mgmt
->u
.action
.u
.measurement
)))
3344 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3347 ieee80211_process_measurement_req(sdata
, mgmt
, len
);
3349 case WLAN_ACTION_SPCT_CHL_SWITCH
: {
3351 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3352 sizeof(mgmt
->u
.action
.u
.chan_switch
)))
3355 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3356 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3357 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
3360 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
3361 bssid
= sdata
->u
.mgd
.bssid
;
3362 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
3363 bssid
= sdata
->u
.ibss
.bssid
;
3364 else if (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
3369 if (!ether_addr_equal(mgmt
->bssid
, bssid
))
3376 case WLAN_CATEGORY_SELF_PROTECTED
:
3377 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3378 sizeof(mgmt
->u
.action
.u
.self_prot
.action_code
)))
3381 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
3382 case WLAN_SP_MESH_PEERING_OPEN
:
3383 case WLAN_SP_MESH_PEERING_CLOSE
:
3384 case WLAN_SP_MESH_PEERING_CONFIRM
:
3385 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3387 if (sdata
->u
.mesh
.user_mpm
)
3388 /* userspace handles this frame */
3391 case WLAN_SP_MGK_INFORM
:
3392 case WLAN_SP_MGK_ACK
:
3393 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3398 case WLAN_CATEGORY_MESH_ACTION
:
3399 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3400 sizeof(mgmt
->u
.action
.u
.mesh_action
.action_code
)))
3403 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
3405 if (mesh_action_is_path_sel(mgmt
) &&
3406 !mesh_path_sel_is_hwmp(sdata
))
3414 status
->rx_flags
|= IEEE80211_RX_MALFORMED_ACTION_FRM
;
3415 /* will return in the next handlers */
3420 rx
->sta
->rx_stats
.packets
++;
3421 dev_kfree_skb(rx
->skb
);
3425 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
3426 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3428 rx
->sta
->rx_stats
.packets
++;
3432 static ieee80211_rx_result debug_noinline
3433 ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data
*rx
)
3435 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3438 /* skip known-bad action frames and return them in the next handler */
3439 if (status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
)
3443 * Getting here means the kernel doesn't know how to handle
3444 * it, but maybe userspace does ... include returned frames
3445 * so userspace can register for those to know whether ones
3446 * it transmitted were processed or returned.
3449 if (ieee80211_hw_check(&rx
->local
->hw
, SIGNAL_DBM
) &&
3450 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
))
3451 sig
= status
->signal
;
3453 if (cfg80211_rx_mgmt_khz(&rx
->sdata
->wdev
,
3454 ieee80211_rx_status_to_khz(status
), sig
,
3455 rx
->skb
->data
, rx
->skb
->len
, 0)) {
3457 rx
->sta
->rx_stats
.packets
++;
3458 dev_kfree_skb(rx
->skb
);
3465 static ieee80211_rx_result debug_noinline
3466 ieee80211_rx_h_action_post_userspace(struct ieee80211_rx_data
*rx
)
3468 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3469 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3470 int len
= rx
->skb
->len
;
3472 if (!ieee80211_is_action(mgmt
->frame_control
))
3475 switch (mgmt
->u
.action
.category
) {
3476 case WLAN_CATEGORY_SA_QUERY
:
3477 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
3478 sizeof(mgmt
->u
.action
.u
.sa_query
)))
3481 switch (mgmt
->u
.action
.u
.sa_query
.action
) {
3482 case WLAN_ACTION_SA_QUERY_REQUEST
:
3483 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3485 ieee80211_process_sa_query_req(sdata
, mgmt
, len
);
3495 rx
->sta
->rx_stats
.packets
++;
3496 dev_kfree_skb(rx
->skb
);
3500 static ieee80211_rx_result debug_noinline
3501 ieee80211_rx_h_action_return(struct ieee80211_rx_data
*rx
)
3503 struct ieee80211_local
*local
= rx
->local
;
3504 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
3505 struct sk_buff
*nskb
;
3506 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3507 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
3509 if (!ieee80211_is_action(mgmt
->frame_control
))
3513 * For AP mode, hostapd is responsible for handling any action
3514 * frames that we didn't handle, including returning unknown
3515 * ones. For all other modes we will return them to the sender,
3516 * setting the 0x80 bit in the action category, as required by
3517 * 802.11-2012 9.24.4.
3518 * Newer versions of hostapd shall also use the management frame
3519 * registration mechanisms, but older ones still use cooked
3520 * monitor interfaces so push all frames there.
3522 if (!(status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
) &&
3523 (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
3524 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
3525 return RX_DROP_MONITOR
;
3527 if (is_multicast_ether_addr(mgmt
->da
))
3528 return RX_DROP_MONITOR
;
3530 /* do not return rejected action frames */
3531 if (mgmt
->u
.action
.category
& 0x80)
3532 return RX_DROP_UNUSABLE
;
3534 nskb
= skb_copy_expand(rx
->skb
, local
->hw
.extra_tx_headroom
, 0,
3537 struct ieee80211_mgmt
*nmgmt
= (void *)nskb
->data
;
3539 nmgmt
->u
.action
.category
|= 0x80;
3540 memcpy(nmgmt
->da
, nmgmt
->sa
, ETH_ALEN
);
3541 memcpy(nmgmt
->sa
, rx
->sdata
->vif
.addr
, ETH_ALEN
);
3543 memset(nskb
->cb
, 0, sizeof(nskb
->cb
));
3545 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
3546 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(nskb
);
3548 info
->flags
= IEEE80211_TX_CTL_TX_OFFCHAN
|
3549 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
|
3550 IEEE80211_TX_CTL_NO_CCK_RATE
;
3551 if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
3553 local
->hw
.offchannel_tx_hw_queue
;
3556 __ieee80211_tx_skb_tid_band(rx
->sdata
, nskb
, 7,
3559 dev_kfree_skb(rx
->skb
);
3563 static ieee80211_rx_result debug_noinline
3564 ieee80211_rx_h_ext(struct ieee80211_rx_data
*rx
)
3566 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3567 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
3569 if (!ieee80211_is_ext(hdr
->frame_control
))
3572 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3573 return RX_DROP_MONITOR
;
3575 /* for now only beacons are ext, so queue them */
3576 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
3577 ieee80211_queue_work(&rx
->local
->hw
, &sdata
->work
);
3579 rx
->sta
->rx_stats
.packets
++;
3584 static ieee80211_rx_result debug_noinline
3585 ieee80211_rx_h_mgmt(struct ieee80211_rx_data
*rx
)
3587 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3588 struct ieee80211_mgmt
*mgmt
= (void *)rx
->skb
->data
;
3591 stype
= mgmt
->frame_control
& cpu_to_le16(IEEE80211_FCTL_STYPE
);
3593 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
3594 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3595 sdata
->vif
.type
!= NL80211_IFTYPE_OCB
&&
3596 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3597 return RX_DROP_MONITOR
;
3600 case cpu_to_le16(IEEE80211_STYPE_AUTH
):
3601 case cpu_to_le16(IEEE80211_STYPE_BEACON
):
3602 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP
):
3603 /* process for all: mesh, mlme, ibss */
3605 case cpu_to_le16(IEEE80211_STYPE_DEAUTH
):
3606 if (is_multicast_ether_addr(mgmt
->da
) &&
3607 !is_broadcast_ether_addr(mgmt
->da
))
3608 return RX_DROP_MONITOR
;
3610 /* process only for station/IBSS */
3611 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
3612 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
3613 return RX_DROP_MONITOR
;
3615 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP
):
3616 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP
):
3617 case cpu_to_le16(IEEE80211_STYPE_DISASSOC
):
3618 if (is_multicast_ether_addr(mgmt
->da
) &&
3619 !is_broadcast_ether_addr(mgmt
->da
))
3620 return RX_DROP_MONITOR
;
3622 /* process only for station */
3623 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
3624 return RX_DROP_MONITOR
;
3626 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
):
3627 /* process only for ibss and mesh */
3628 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
3629 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
3630 return RX_DROP_MONITOR
;
3633 return RX_DROP_MONITOR
;
3636 /* queue up frame and kick off work to process it */
3637 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
3638 ieee80211_queue_work(&rx
->local
->hw
, &sdata
->work
);
3640 rx
->sta
->rx_stats
.packets
++;
3645 static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data
*rx
,
3646 struct ieee80211_rate
*rate
)
3648 struct ieee80211_sub_if_data
*sdata
;
3649 struct ieee80211_local
*local
= rx
->local
;
3650 struct sk_buff
*skb
= rx
->skb
, *skb2
;
3651 struct net_device
*prev_dev
= NULL
;
3652 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3653 int needed_headroom
;
3656 * If cooked monitor has been processed already, then
3657 * don't do it again. If not, set the flag.
3659 if (rx
->flags
& IEEE80211_RX_CMNTR
)
3661 rx
->flags
|= IEEE80211_RX_CMNTR
;
3663 /* If there are no cooked monitor interfaces, just free the SKB */
3664 if (!local
->cooked_mntrs
)
3667 /* vendor data is long removed here */
3668 status
->flag
&= ~RX_FLAG_RADIOTAP_VENDOR_DATA
;
3669 /* room for the radiotap header based on driver features */
3670 needed_headroom
= ieee80211_rx_radiotap_hdrlen(local
, status
, skb
);
3672 if (skb_headroom(skb
) < needed_headroom
&&
3673 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
))
3676 /* prepend radiotap information */
3677 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, needed_headroom
,
3680 skb_reset_mac_header(skb
);
3681 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3682 skb
->pkt_type
= PACKET_OTHERHOST
;
3683 skb
->protocol
= htons(ETH_P_802_2
);
3685 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3686 if (!ieee80211_sdata_running(sdata
))
3689 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
||
3690 !(sdata
->u
.mntr
.flags
& MONITOR_FLAG_COOK_FRAMES
))
3694 skb2
= skb_clone(skb
, GFP_ATOMIC
);
3696 skb2
->dev
= prev_dev
;
3697 netif_receive_skb(skb2
);
3701 prev_dev
= sdata
->dev
;
3702 ieee80211_rx_stats(sdata
->dev
, skb
->len
);
3706 skb
->dev
= prev_dev
;
3707 netif_receive_skb(skb
);
3715 static void ieee80211_rx_handlers_result(struct ieee80211_rx_data
*rx
,
3716 ieee80211_rx_result res
)
3719 case RX_DROP_MONITOR
:
3720 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
3722 rx
->sta
->rx_stats
.dropped
++;
3725 struct ieee80211_rate
*rate
= NULL
;
3726 struct ieee80211_supported_band
*sband
;
3727 struct ieee80211_rx_status
*status
;
3729 status
= IEEE80211_SKB_RXCB((rx
->skb
));
3731 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
3732 if (status
->encoding
== RX_ENC_LEGACY
)
3733 rate
= &sband
->bitrates
[status
->rate_idx
];
3735 ieee80211_rx_cooked_monitor(rx
, rate
);
3738 case RX_DROP_UNUSABLE
:
3739 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
3741 rx
->sta
->rx_stats
.dropped
++;
3742 dev_kfree_skb(rx
->skb
);
3745 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_queued
);
3750 static void ieee80211_rx_handlers(struct ieee80211_rx_data
*rx
,
3751 struct sk_buff_head
*frames
)
3753 ieee80211_rx_result res
= RX_DROP_MONITOR
;
3754 struct sk_buff
*skb
;
3756 #define CALL_RXH(rxh) \
3759 if (res != RX_CONTINUE) \
3763 /* Lock here to avoid hitting all of the data used in the RX
3764 * path (e.g. key data, station data, ...) concurrently when
3765 * a frame is released from the reorder buffer due to timeout
3766 * from the timer, potentially concurrently with RX from the
3769 spin_lock_bh(&rx
->local
->rx_path_lock
);
3771 while ((skb
= __skb_dequeue(frames
))) {
3773 * all the other fields are valid across frames
3774 * that belong to an aMPDU since they are on the
3775 * same TID from the same station
3779 CALL_RXH(ieee80211_rx_h_check_more_data
);
3780 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll
);
3781 CALL_RXH(ieee80211_rx_h_sta_process
);
3782 CALL_RXH(ieee80211_rx_h_decrypt
);
3783 CALL_RXH(ieee80211_rx_h_defragment
);
3784 CALL_RXH(ieee80211_rx_h_michael_mic_verify
);
3785 /* must be after MMIC verify so header is counted in MPDU mic */
3786 #ifdef CONFIG_MAC80211_MESH
3787 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
3788 CALL_RXH(ieee80211_rx_h_mesh_fwding
);
3790 CALL_RXH(ieee80211_rx_h_amsdu
);
3791 CALL_RXH(ieee80211_rx_h_data
);
3793 /* special treatment -- needs the queue */
3794 res
= ieee80211_rx_h_ctrl(rx
, frames
);
3795 if (res
!= RX_CONTINUE
)
3798 CALL_RXH(ieee80211_rx_h_mgmt_check
);
3799 CALL_RXH(ieee80211_rx_h_action
);
3800 CALL_RXH(ieee80211_rx_h_userspace_mgmt
);
3801 CALL_RXH(ieee80211_rx_h_action_post_userspace
);
3802 CALL_RXH(ieee80211_rx_h_action_return
);
3803 CALL_RXH(ieee80211_rx_h_ext
);
3804 CALL_RXH(ieee80211_rx_h_mgmt
);
3807 ieee80211_rx_handlers_result(rx
, res
);
3812 spin_unlock_bh(&rx
->local
->rx_path_lock
);
3815 static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data
*rx
)
3817 struct sk_buff_head reorder_release
;
3818 ieee80211_rx_result res
= RX_DROP_MONITOR
;
3820 __skb_queue_head_init(&reorder_release
);
3822 #define CALL_RXH(rxh) \
3825 if (res != RX_CONTINUE) \
3829 CALL_RXH(ieee80211_rx_h_check_dup
);
3830 CALL_RXH(ieee80211_rx_h_check
);
3832 ieee80211_rx_reorder_ampdu(rx
, &reorder_release
);
3834 ieee80211_rx_handlers(rx
, &reorder_release
);
3838 ieee80211_rx_handlers_result(rx
, res
);
3844 * This function makes calls into the RX path, therefore
3845 * it has to be invoked under RCU read lock.
3847 void ieee80211_release_reorder_timeout(struct sta_info
*sta
, int tid
)
3849 struct sk_buff_head frames
;
3850 struct ieee80211_rx_data rx
= {
3852 .sdata
= sta
->sdata
,
3853 .local
= sta
->local
,
3854 /* This is OK -- must be QoS data frame */
3855 .security_idx
= tid
,
3858 struct tid_ampdu_rx
*tid_agg_rx
;
3860 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
3864 __skb_queue_head_init(&frames
);
3866 spin_lock(&tid_agg_rx
->reorder_lock
);
3867 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
3868 spin_unlock(&tid_agg_rx
->reorder_lock
);
3870 if (!skb_queue_empty(&frames
)) {
3871 struct ieee80211_event event
= {
3872 .type
= BA_FRAME_TIMEOUT
,
3874 .u
.ba
.sta
= &sta
->sta
,
3876 drv_event_callback(rx
.local
, rx
.sdata
, &event
);
3879 ieee80211_rx_handlers(&rx
, &frames
);
3882 void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta
*pubsta
, u8 tid
,
3883 u16 ssn
, u64 filtered
,
3886 struct sta_info
*sta
;
3887 struct tid_ampdu_rx
*tid_agg_rx
;
3888 struct sk_buff_head frames
;
3889 struct ieee80211_rx_data rx
= {
3890 /* This is OK -- must be QoS data frame */
3891 .security_idx
= tid
,
3896 if (WARN_ON(!pubsta
|| tid
>= IEEE80211_NUM_TIDS
))
3899 __skb_queue_head_init(&frames
);
3901 sta
= container_of(pubsta
, struct sta_info
, sta
);
3904 rx
.sdata
= sta
->sdata
;
3905 rx
.local
= sta
->local
;
3908 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
3912 spin_lock_bh(&tid_agg_rx
->reorder_lock
);
3914 if (received_mpdus
>= IEEE80211_SN_MODULO
>> 1) {
3917 /* release all frames in the reorder buffer */
3918 release
= (tid_agg_rx
->head_seq_num
+ tid_agg_rx
->buf_size
) %
3919 IEEE80211_SN_MODULO
;
3920 ieee80211_release_reorder_frames(sta
->sdata
, tid_agg_rx
,
3922 /* update ssn to match received ssn */
3923 tid_agg_rx
->head_seq_num
= ssn
;
3925 ieee80211_release_reorder_frames(sta
->sdata
, tid_agg_rx
, ssn
,
3929 /* handle the case that received ssn is behind the mac ssn.
3930 * it can be tid_agg_rx->buf_size behind and still be valid */
3931 diff
= (tid_agg_rx
->head_seq_num
- ssn
) & IEEE80211_SN_MASK
;
3932 if (diff
>= tid_agg_rx
->buf_size
) {
3933 tid_agg_rx
->reorder_buf_filtered
= 0;
3936 filtered
= filtered
>> diff
;
3940 for (i
= 0; i
< tid_agg_rx
->buf_size
; i
++) {
3941 int index
= (ssn
+ i
) % tid_agg_rx
->buf_size
;
3943 tid_agg_rx
->reorder_buf_filtered
&= ~BIT_ULL(index
);
3944 if (filtered
& BIT_ULL(i
))
3945 tid_agg_rx
->reorder_buf_filtered
|= BIT_ULL(index
);
3948 /* now process also frames that the filter marking released */
3949 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
3952 spin_unlock_bh(&tid_agg_rx
->reorder_lock
);
3954 ieee80211_rx_handlers(&rx
, &frames
);
3959 EXPORT_SYMBOL(ieee80211_mark_rx_ba_filtered_frames
);
3961 /* main receive path */
3963 static bool ieee80211_accept_frame(struct ieee80211_rx_data
*rx
)
3965 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3966 struct sk_buff
*skb
= rx
->skb
;
3967 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
3968 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3969 u8
*bssid
= ieee80211_get_bssid(hdr
, skb
->len
, sdata
->vif
.type
);
3970 bool multicast
= is_multicast_ether_addr(hdr
->addr1
) ||
3971 ieee80211_is_s1g_beacon(hdr
->frame_control
);
3973 switch (sdata
->vif
.type
) {
3974 case NL80211_IFTYPE_STATION
:
3975 if (!bssid
&& !sdata
->u
.mgd
.use_4addr
)
3977 if (ieee80211_is_robust_mgmt_frame(skb
) && !rx
->sta
)
3981 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
3982 case NL80211_IFTYPE_ADHOC
:
3985 if (ether_addr_equal(sdata
->vif
.addr
, hdr
->addr2
) ||
3986 ether_addr_equal(sdata
->u
.ibss
.bssid
, hdr
->addr2
))
3988 if (ieee80211_is_beacon(hdr
->frame_control
))
3990 if (!ieee80211_bssid_match(bssid
, sdata
->u
.ibss
.bssid
))
3993 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
3997 if (status
->encoding
!= RX_ENC_LEGACY
)
3998 rate_idx
= 0; /* TODO: HT/VHT rates */
4000 rate_idx
= status
->rate_idx
;
4001 ieee80211_ibss_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
4005 case NL80211_IFTYPE_OCB
:
4008 if (!ieee80211_is_data_present(hdr
->frame_control
))
4010 if (!is_broadcast_ether_addr(bssid
))
4013 !ether_addr_equal(sdata
->dev
->dev_addr
, hdr
->addr1
))
4017 if (status
->encoding
!= RX_ENC_LEGACY
)
4018 rate_idx
= 0; /* TODO: HT rates */
4020 rate_idx
= status
->rate_idx
;
4021 ieee80211_ocb_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
4025 case NL80211_IFTYPE_MESH_POINT
:
4026 if (ether_addr_equal(sdata
->vif
.addr
, hdr
->addr2
))
4030 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
4031 case NL80211_IFTYPE_AP_VLAN
:
4032 case NL80211_IFTYPE_AP
:
4034 return ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
);
4036 if (!ieee80211_bssid_match(bssid
, sdata
->vif
.addr
)) {
4038 * Accept public action frames even when the
4039 * BSSID doesn't match, this is used for P2P
4040 * and location updates. Note that mac80211
4041 * itself never looks at these frames.
4044 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
4046 if (ieee80211_is_public_action(hdr
, skb
->len
))
4048 return ieee80211_is_beacon(hdr
->frame_control
);
4051 if (!ieee80211_has_tods(hdr
->frame_control
)) {
4052 /* ignore data frames to TDLS-peers */
4053 if (ieee80211_is_data(hdr
->frame_control
))
4055 /* ignore action frames to TDLS-peers */
4056 if (ieee80211_is_action(hdr
->frame_control
) &&
4057 !is_broadcast_ether_addr(bssid
) &&
4058 !ether_addr_equal(bssid
, hdr
->addr1
))
4063 * 802.11-2016 Table 9-26 says that for data frames, A1 must be
4064 * the BSSID - we've checked that already but may have accepted
4065 * the wildcard (ff:ff:ff:ff:ff:ff).
4068 * The BSSID of the Data frame is determined as follows:
4069 * a) If the STA is contained within an AP or is associated
4070 * with an AP, the BSSID is the address currently in use
4071 * by the STA contained in the AP.
4073 * So we should not accept data frames with an address that's
4076 * Accepting it also opens a security problem because stations
4077 * could encrypt it with the GTK and inject traffic that way.
4079 if (ieee80211_is_data(hdr
->frame_control
) && multicast
)
4083 case NL80211_IFTYPE_WDS
:
4084 if (bssid
|| !ieee80211_is_data(hdr
->frame_control
))
4086 return ether_addr_equal(sdata
->u
.wds
.remote_addr
, hdr
->addr2
);
4087 case NL80211_IFTYPE_P2P_DEVICE
:
4088 return ieee80211_is_public_action(hdr
, skb
->len
) ||
4089 ieee80211_is_probe_req(hdr
->frame_control
) ||
4090 ieee80211_is_probe_resp(hdr
->frame_control
) ||
4091 ieee80211_is_beacon(hdr
->frame_control
);
4092 case NL80211_IFTYPE_NAN
:
4093 /* Currently no frames on NAN interface are allowed */
4103 void ieee80211_check_fast_rx(struct sta_info
*sta
)
4105 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
4106 struct ieee80211_local
*local
= sdata
->local
;
4107 struct ieee80211_key
*key
;
4108 struct ieee80211_fast_rx fastrx
= {
4110 .vif_type
= sdata
->vif
.type
,
4111 .control_port_protocol
= sdata
->control_port_protocol
,
4112 }, *old
, *new = NULL
;
4113 bool assign
= false;
4115 /* use sparse to check that we don't return without updating */
4116 __acquire(check_fast_rx
);
4118 BUILD_BUG_ON(sizeof(fastrx
.rfc1042_hdr
) != sizeof(rfc1042_header
));
4119 BUILD_BUG_ON(sizeof(fastrx
.rfc1042_hdr
) != ETH_ALEN
);
4120 ether_addr_copy(fastrx
.rfc1042_hdr
, rfc1042_header
);
4121 ether_addr_copy(fastrx
.vif_addr
, sdata
->vif
.addr
);
4123 fastrx
.uses_rss
= ieee80211_hw_check(&local
->hw
, USES_RSS
);
4125 /* fast-rx doesn't do reordering */
4126 if (ieee80211_hw_check(&local
->hw
, AMPDU_AGGREGATION
) &&
4127 !ieee80211_hw_check(&local
->hw
, SUPPORTS_REORDERING_BUFFER
))
4130 switch (sdata
->vif
.type
) {
4131 case NL80211_IFTYPE_STATION
:
4132 if (sta
->sta
.tdls
) {
4133 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
4134 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
4135 fastrx
.expected_ds_bits
= 0;
4137 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr1
);
4138 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4139 fastrx
.expected_ds_bits
=
4140 cpu_to_le16(IEEE80211_FCTL_FROMDS
);
4143 if (sdata
->u
.mgd
.use_4addr
&& !sta
->sta
.tdls
) {
4144 fastrx
.expected_ds_bits
|=
4145 cpu_to_le16(IEEE80211_FCTL_TODS
);
4146 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4147 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
4150 if (!sdata
->u
.mgd
.powersave
)
4153 /* software powersave is a huge mess, avoid all of it */
4154 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
))
4156 if (ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
) &&
4157 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
))
4160 case NL80211_IFTYPE_AP_VLAN
:
4161 case NL80211_IFTYPE_AP
:
4162 /* parallel-rx requires this, at least with calls to
4163 * ieee80211_sta_ps_transition()
4165 if (!ieee80211_hw_check(&local
->hw
, AP_LINK_PS
))
4167 fastrx
.da_offs
= offsetof(struct ieee80211_hdr
, addr3
);
4168 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr2
);
4169 fastrx
.expected_ds_bits
= cpu_to_le16(IEEE80211_FCTL_TODS
);
4171 fastrx
.internal_forward
=
4172 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
4173 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
||
4174 !sdata
->u
.vlan
.sta
);
4176 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
4177 sdata
->u
.vlan
.sta
) {
4178 fastrx
.expected_ds_bits
|=
4179 cpu_to_le16(IEEE80211_FCTL_FROMDS
);
4180 fastrx
.sa_offs
= offsetof(struct ieee80211_hdr
, addr4
);
4181 fastrx
.internal_forward
= 0;
4189 if (!test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
4193 key
= rcu_dereference(sta
->ptk
[sta
->ptk_idx
]);
4195 switch (key
->conf
.cipher
) {
4196 case WLAN_CIPHER_SUITE_TKIP
:
4197 /* we don't want to deal with MMIC in fast-rx */
4199 case WLAN_CIPHER_SUITE_CCMP
:
4200 case WLAN_CIPHER_SUITE_CCMP_256
:
4201 case WLAN_CIPHER_SUITE_GCMP
:
4202 case WLAN_CIPHER_SUITE_GCMP_256
:
4205 /* We also don't want to deal with
4206 * WEP or cipher scheme.
4212 fastrx
.icv_len
= key
->conf
.icv_len
;
4219 __release(check_fast_rx
);
4222 new = kmemdup(&fastrx
, sizeof(fastrx
), GFP_KERNEL
);
4224 spin_lock_bh(&sta
->lock
);
4225 old
= rcu_dereference_protected(sta
->fast_rx
, true);
4226 rcu_assign_pointer(sta
->fast_rx
, new);
4227 spin_unlock_bh(&sta
->lock
);
4230 kfree_rcu(old
, rcu_head
);
4233 void ieee80211_clear_fast_rx(struct sta_info
*sta
)
4235 struct ieee80211_fast_rx
*old
;
4237 spin_lock_bh(&sta
->lock
);
4238 old
= rcu_dereference_protected(sta
->fast_rx
, true);
4239 RCU_INIT_POINTER(sta
->fast_rx
, NULL
);
4240 spin_unlock_bh(&sta
->lock
);
4243 kfree_rcu(old
, rcu_head
);
4246 void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data
*sdata
)
4248 struct ieee80211_local
*local
= sdata
->local
;
4249 struct sta_info
*sta
;
4251 lockdep_assert_held(&local
->sta_mtx
);
4253 list_for_each_entry(sta
, &local
->sta_list
, list
) {
4254 if (sdata
!= sta
->sdata
&&
4255 (!sta
->sdata
->bss
|| sta
->sdata
->bss
!= sdata
->bss
))
4257 ieee80211_check_fast_rx(sta
);
4261 void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data
*sdata
)
4263 struct ieee80211_local
*local
= sdata
->local
;
4265 mutex_lock(&local
->sta_mtx
);
4266 __ieee80211_check_fast_rx_iface(sdata
);
4267 mutex_unlock(&local
->sta_mtx
);
4270 static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data
*rx
,
4271 struct ieee80211_fast_rx
*fast_rx
)
4273 struct sk_buff
*skb
= rx
->skb
;
4274 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
4275 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
4276 struct sta_info
*sta
= rx
->sta
;
4277 int orig_len
= skb
->len
;
4278 int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
4279 int snap_offs
= hdrlen
;
4281 u8 snap
[sizeof(rfc1042_header
)];
4283 } *payload
__aligned(2);
4287 } addrs
__aligned(2);
4288 struct ieee80211_sta_rx_stats
*stats
= &sta
->rx_stats
;
4290 if (fast_rx
->uses_rss
)
4291 stats
= this_cpu_ptr(sta
->pcpu_rx_stats
);
4293 /* for parallel-rx, we need to have DUP_VALIDATED, otherwise we write
4294 * to a common data structure; drivers can implement that per queue
4295 * but we don't have that information in mac80211
4297 if (!(status
->flag
& RX_FLAG_DUP_VALIDATED
))
4300 #define FAST_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED)
4302 /* If using encryption, we also need to have:
4303 * - PN_VALIDATED: similar, but the implementation is tricky
4304 * - DECRYPTED: necessary for PN_VALIDATED
4307 (status
->flag
& FAST_RX_CRYPT_FLAGS
) != FAST_RX_CRYPT_FLAGS
)
4310 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
4313 if (unlikely(ieee80211_is_frag(hdr
)))
4316 /* Since our interface address cannot be multicast, this
4317 * implicitly also rejects multicast frames without the
4320 * We shouldn't get any *data* frames not addressed to us
4321 * (AP mode will accept multicast *management* frames), but
4322 * punting here will make it go through the full checks in
4323 * ieee80211_accept_frame().
4325 if (!ether_addr_equal(fast_rx
->vif_addr
, hdr
->addr1
))
4328 if ((hdr
->frame_control
& cpu_to_le16(IEEE80211_FCTL_FROMDS
|
4329 IEEE80211_FCTL_TODS
)) !=
4330 fast_rx
->expected_ds_bits
)
4333 /* assign the key to drop unencrypted frames (later)
4334 * and strip the IV/MIC if necessary
4336 if (fast_rx
->key
&& !(status
->flag
& RX_FLAG_IV_STRIPPED
)) {
4337 /* GCMP header length is the same */
4338 snap_offs
+= IEEE80211_CCMP_HDR_LEN
;
4341 if (!(status
->rx_flags
& IEEE80211_RX_AMSDU
)) {
4342 if (!pskb_may_pull(skb
, snap_offs
+ sizeof(*payload
)))
4345 payload
= (void *)(skb
->data
+ snap_offs
);
4347 if (!ether_addr_equal(payload
->snap
, fast_rx
->rfc1042_hdr
))
4350 /* Don't handle these here since they require special code.
4351 * Accept AARP and IPX even though they should come with a
4352 * bridge-tunnel header - but if we get them this way then
4353 * there's little point in discarding them.
4355 if (unlikely(payload
->proto
== cpu_to_be16(ETH_P_TDLS
) ||
4356 payload
->proto
== fast_rx
->control_port_protocol
))
4360 /* after this point, don't punt to the slowpath! */
4362 if (rx
->key
&& !(status
->flag
& RX_FLAG_MIC_STRIPPED
) &&
4363 pskb_trim(skb
, skb
->len
- fast_rx
->icv_len
))
4366 /* statistics part of ieee80211_rx_h_sta_process() */
4367 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
4368 stats
->last_signal
= status
->signal
;
4369 if (!fast_rx
->uses_rss
)
4370 ewma_signal_add(&sta
->rx_stats_avg
.signal
,
4374 if (status
->chains
) {
4377 stats
->chains
= status
->chains
;
4378 for (i
= 0; i
< ARRAY_SIZE(status
->chain_signal
); i
++) {
4379 int signal
= status
->chain_signal
[i
];
4381 if (!(status
->chains
& BIT(i
)))
4384 stats
->chain_signal_last
[i
] = signal
;
4385 if (!fast_rx
->uses_rss
)
4386 ewma_signal_add(&sta
->rx_stats_avg
.chain_signal
[i
],
4390 /* end of statistics */
4392 if (rx
->key
&& !ieee80211_has_protected(hdr
->frame_control
))
4395 if (status
->rx_flags
& IEEE80211_RX_AMSDU
) {
4396 if (__ieee80211_rx_h_amsdu(rx
, snap_offs
- hdrlen
) !=
4403 stats
->last_rx
= jiffies
;
4404 stats
->last_rate
= sta_stats_encode_rate(status
);
4409 /* do the header conversion - first grab the addresses */
4410 ether_addr_copy(addrs
.da
, skb
->data
+ fast_rx
->da_offs
);
4411 ether_addr_copy(addrs
.sa
, skb
->data
+ fast_rx
->sa_offs
);
4412 /* remove the SNAP but leave the ethertype */
4413 skb_pull(skb
, snap_offs
+ sizeof(rfc1042_header
));
4414 /* push the addresses in front */
4415 memcpy(skb_push(skb
, sizeof(addrs
)), &addrs
, sizeof(addrs
));
4417 skb
->dev
= fast_rx
->dev
;
4419 ieee80211_rx_stats(fast_rx
->dev
, skb
->len
);
4421 /* The seqno index has the same property as needed
4422 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
4423 * for non-QoS-data frames. Here we know it's a data
4424 * frame, so count MSDUs.
4426 u64_stats_update_begin(&stats
->syncp
);
4427 stats
->msdu
[rx
->seqno_idx
]++;
4428 stats
->bytes
+= orig_len
;
4429 u64_stats_update_end(&stats
->syncp
);
4431 if (fast_rx
->internal_forward
) {
4432 struct sk_buff
*xmit_skb
= NULL
;
4433 if (is_multicast_ether_addr(addrs
.da
)) {
4434 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
4435 } else if (!ether_addr_equal(addrs
.da
, addrs
.sa
) &&
4436 sta_info_get(rx
->sdata
, addrs
.da
)) {
4443 * Send to wireless media and increase priority by 256
4444 * to keep the received priority instead of
4445 * reclassifying the frame (see cfg80211_classify8021d).
4447 xmit_skb
->priority
+= 256;
4448 xmit_skb
->protocol
= htons(ETH_P_802_3
);
4449 skb_reset_network_header(xmit_skb
);
4450 skb_reset_mac_header(xmit_skb
);
4451 dev_queue_xmit(xmit_skb
);
4458 /* deliver to local stack */
4459 skb
->protocol
= eth_type_trans(skb
, fast_rx
->dev
);
4460 memset(skb
->cb
, 0, sizeof(skb
->cb
));
4462 list_add_tail(&skb
->list
, rx
->list
);
4464 netif_receive_skb(skb
);
4474 * This function returns whether or not the SKB
4475 * was destined for RX processing or not, which,
4476 * if consume is true, is equivalent to whether
4477 * or not the skb was consumed.
4479 static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data
*rx
,
4480 struct sk_buff
*skb
, bool consume
)
4482 struct ieee80211_local
*local
= rx
->local
;
4483 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
4487 /* See if we can do fast-rx; if we have to copy we already lost,
4488 * so punt in that case. We should never have to deliver a data
4489 * frame to multiple interfaces anyway.
4491 * We skip the ieee80211_accept_frame() call and do the necessary
4492 * checking inside ieee80211_invoke_fast_rx().
4494 if (consume
&& rx
->sta
) {
4495 struct ieee80211_fast_rx
*fast_rx
;
4497 fast_rx
= rcu_dereference(rx
->sta
->fast_rx
);
4498 if (fast_rx
&& ieee80211_invoke_fast_rx(rx
, fast_rx
))
4502 if (!ieee80211_accept_frame(rx
))
4506 skb
= skb_copy(skb
, GFP_ATOMIC
);
4508 if (net_ratelimit())
4509 wiphy_debug(local
->hw
.wiphy
,
4510 "failed to copy skb for %s\n",
4518 ieee80211_invoke_rx_handlers(rx
);
4523 * This is the actual Rx frames handler. as it belongs to Rx path it must
4524 * be called with rcu_read_lock protection.
4526 static void __ieee80211_rx_handle_packet(struct ieee80211_hw
*hw
,
4527 struct ieee80211_sta
*pubsta
,
4528 struct sk_buff
*skb
,
4529 struct list_head
*list
)
4531 struct ieee80211_local
*local
= hw_to_local(hw
);
4532 struct ieee80211_sub_if_data
*sdata
;
4533 struct ieee80211_hdr
*hdr
;
4535 struct ieee80211_rx_data rx
;
4536 struct ieee80211_sub_if_data
*prev
;
4537 struct rhlist_head
*tmp
;
4540 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
4541 memset(&rx
, 0, sizeof(rx
));
4546 if (ieee80211_is_data(fc
) || ieee80211_is_mgmt(fc
))
4547 I802_DEBUG_INC(local
->dot11ReceivedFragmentCount
);
4549 if (ieee80211_is_mgmt(fc
)) {
4550 /* drop frame if too short for header */
4551 if (skb
->len
< ieee80211_hdrlen(fc
))
4554 err
= skb_linearize(skb
);
4556 err
= !pskb_may_pull(skb
, ieee80211_hdrlen(fc
));
4564 hdr
= (struct ieee80211_hdr
*)skb
->data
;
4565 ieee80211_parse_qos(&rx
);
4566 ieee80211_verify_alignment(&rx
);
4568 if (unlikely(ieee80211_is_probe_resp(hdr
->frame_control
) ||
4569 ieee80211_is_beacon(hdr
->frame_control
) ||
4570 ieee80211_is_s1g_beacon(hdr
->frame_control
)))
4571 ieee80211_scan_rx(local
, skb
);
4573 if (ieee80211_is_data(fc
)) {
4574 struct sta_info
*sta
, *prev_sta
;
4577 rx
.sta
= container_of(pubsta
, struct sta_info
, sta
);
4578 rx
.sdata
= rx
.sta
->sdata
;
4579 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
4586 for_each_sta_info(local
, hdr
->addr2
, sta
, tmp
) {
4593 rx
.sdata
= prev_sta
->sdata
;
4594 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
4601 rx
.sdata
= prev_sta
->sdata
;
4603 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
4611 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4612 if (!ieee80211_sdata_running(sdata
))
4615 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
4616 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
4620 * frame is destined for this interface, but if it's
4621 * not also for the previous one we handle that after
4622 * the loop to avoid copying the SKB once too much
4630 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
4632 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
4638 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
4641 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
4650 * This is the receive path handler. It is called by a low level driver when an
4651 * 802.11 MPDU is received from the hardware.
4653 void ieee80211_rx_list(struct ieee80211_hw
*hw
, struct ieee80211_sta
*pubsta
,
4654 struct sk_buff
*skb
, struct list_head
*list
)
4656 struct ieee80211_local
*local
= hw_to_local(hw
);
4657 struct ieee80211_rate
*rate
= NULL
;
4658 struct ieee80211_supported_band
*sband
;
4659 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
4661 WARN_ON_ONCE(softirq_count() == 0);
4663 if (WARN_ON(status
->band
>= NUM_NL80211_BANDS
))
4666 sband
= local
->hw
.wiphy
->bands
[status
->band
];
4667 if (WARN_ON(!sband
))
4671 * If we're suspending, it is possible although not too likely
4672 * that we'd be receiving frames after having already partially
4673 * quiesced the stack. We can't process such frames then since
4674 * that might, for example, cause stations to be added or other
4675 * driver callbacks be invoked.
4677 if (unlikely(local
->quiescing
|| local
->suspended
))
4680 /* We might be during a HW reconfig, prevent Rx for the same reason */
4681 if (unlikely(local
->in_reconfig
))
4685 * The same happens when we're not even started,
4686 * but that's worth a warning.
4688 if (WARN_ON(!local
->started
))
4691 if (likely(!(status
->flag
& RX_FLAG_FAILED_PLCP_CRC
))) {
4693 * Validate the rate, unless a PLCP error means that
4694 * we probably can't have a valid rate here anyway.
4697 switch (status
->encoding
) {
4700 * rate_idx is MCS index, which can be [0-76]
4703 * https://wireless.wiki.kernel.org/en/developers/Documentation/ieee80211/802.11n
4705 * Anything else would be some sort of driver or
4706 * hardware error. The driver should catch hardware
4709 if (WARN(status
->rate_idx
> 76,
4710 "Rate marked as an HT rate but passed "
4711 "status->rate_idx is not "
4712 "an MCS index [0-76]: %d (0x%02x)\n",
4718 if (WARN_ONCE(status
->rate_idx
> 9 ||
4721 "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
4722 status
->rate_idx
, status
->nss
))
4726 if (WARN_ONCE(status
->rate_idx
> 11 ||
4729 "Rate marked as an HE rate but data is invalid: MCS: %d, NSS: %d\n",
4730 status
->rate_idx
, status
->nss
))
4737 if (WARN_ON(status
->rate_idx
>= sband
->n_bitrates
))
4739 rate
= &sband
->bitrates
[status
->rate_idx
];
4743 status
->rx_flags
= 0;
4746 * Frames with failed FCS/PLCP checksum are not returned,
4747 * all other frames are returned without radiotap header
4748 * if it was previously present.
4749 * Also, frames with less than 16 bytes are dropped.
4751 skb
= ieee80211_rx_monitor(local
, skb
, rate
);
4755 ieee80211_tpt_led_trig_rx(local
,
4756 ((struct ieee80211_hdr
*)skb
->data
)->frame_control
,
4759 __ieee80211_rx_handle_packet(hw
, pubsta
, skb
, list
);
4765 EXPORT_SYMBOL(ieee80211_rx_list
);
4767 void ieee80211_rx_napi(struct ieee80211_hw
*hw
, struct ieee80211_sta
*pubsta
,
4768 struct sk_buff
*skb
, struct napi_struct
*napi
)
4770 struct sk_buff
*tmp
;
4775 * key references and virtual interfaces are protected using RCU
4776 * and this requires that we are in a read-side RCU section during
4777 * receive processing
4780 ieee80211_rx_list(hw
, pubsta
, skb
, &list
);
4784 netif_receive_skb_list(&list
);
4788 list_for_each_entry_safe(skb
, tmp
, &list
, list
) {
4789 skb_list_del_init(skb
);
4790 napi_gro_receive(napi
, skb
);
4793 EXPORT_SYMBOL(ieee80211_rx_napi
);
4795 /* This is a version of the rx handler that can be called from hard irq
4796 * context. Post the skb on the queue and schedule the tasklet */
4797 void ieee80211_rx_irqsafe(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
4799 struct ieee80211_local
*local
= hw_to_local(hw
);
4801 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status
) > sizeof(skb
->cb
));
4803 skb
->pkt_type
= IEEE80211_RX_MSG
;
4804 skb_queue_tail(&local
->skb_queue
, skb
);
4805 tasklet_schedule(&local
->tasklet
);
4807 EXPORT_SYMBOL(ieee80211_rx_irqsafe
);