2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #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 <net/mac80211.h>
21 #include <net/ieee80211_radiotap.h>
22 #include <asm/unaligned.h>
24 #include "ieee80211_i.h"
25 #include "driver-ops.h"
35 * monitor mode reception
37 * This function cleans up the SKB, i.e. it removes all the stuff
38 * only useful for monitoring.
40 static struct sk_buff
*remove_monitor_info(struct ieee80211_local
*local
,
43 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
45 if (local
->hw
.flags
& IEEE80211_HW_RX_INCLUDES_FCS
) {
46 if (likely(skb
->len
> FCS_LEN
))
47 __pskb_trim(skb
, skb
->len
- FCS_LEN
);
56 if (status
->vendor_radiotap_len
)
57 __pskb_pull(skb
, status
->vendor_radiotap_len
);
62 static inline int should_drop_frame(struct sk_buff
*skb
, int present_fcs_len
)
64 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
65 struct ieee80211_hdr
*hdr
;
67 hdr
= (void *)(skb
->data
+ status
->vendor_radiotap_len
);
69 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
|
70 RX_FLAG_FAILED_PLCP_CRC
|
71 RX_FLAG_AMPDU_IS_ZEROLEN
))
73 if (unlikely(skb
->len
< 16 + present_fcs_len
+
74 status
->vendor_radiotap_len
))
76 if (ieee80211_is_ctl(hdr
->frame_control
) &&
77 !ieee80211_is_pspoll(hdr
->frame_control
) &&
78 !ieee80211_is_back_req(hdr
->frame_control
))
84 ieee80211_rx_radiotap_space(struct ieee80211_local
*local
,
85 struct ieee80211_rx_status
*status
)
89 /* always present fields */
90 len
= sizeof(struct ieee80211_radiotap_header
) + 9;
92 /* allocate extra bitmap */
93 if (status
->vendor_radiotap_len
)
96 if (ieee80211_have_rx_timestamp(status
)) {
100 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
103 /* padding for RX_FLAGS if necessary */
106 if (status
->flag
& RX_FLAG_HT
) /* HT info */
109 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
114 if (status
->flag
& RX_FLAG_VHT
) {
119 if (status
->vendor_radiotap_len
) {
120 if (WARN_ON_ONCE(status
->vendor_radiotap_align
== 0))
121 status
->vendor_radiotap_align
= 1;
122 /* align standard part of vendor namespace */
124 /* allocate standard part of vendor namespace */
126 /* align vendor-defined part */
127 len
= ALIGN(len
, status
->vendor_radiotap_align
);
128 /* vendor-defined part is already in skb */
135 * ieee80211_add_rx_radiotap_header - add radiotap header
137 * add a radiotap header containing all the fields which the hardware provided.
140 ieee80211_add_rx_radiotap_header(struct ieee80211_local
*local
,
142 struct ieee80211_rate
*rate
,
143 int rtap_len
, bool has_fcs
)
145 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
146 struct ieee80211_radiotap_header
*rthdr
;
152 if (!(has_fcs
&& (local
->hw
.flags
& IEEE80211_HW_RX_INCLUDES_FCS
)))
155 rthdr
= (struct ieee80211_radiotap_header
*)skb_push(skb
, rtap_len
);
156 memset(rthdr
, 0, rtap_len
);
158 /* radiotap header, set always present flags */
160 cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS
) |
161 (1 << IEEE80211_RADIOTAP_CHANNEL
) |
162 (1 << IEEE80211_RADIOTAP_ANTENNA
) |
163 (1 << IEEE80211_RADIOTAP_RX_FLAGS
));
164 rthdr
->it_len
= cpu_to_le16(rtap_len
+ status
->vendor_radiotap_len
);
166 pos
= (unsigned char *)(rthdr
+ 1);
168 if (status
->vendor_radiotap_len
) {
170 cpu_to_le32(BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE
)) |
171 cpu_to_le32(BIT(IEEE80211_RADIOTAP_EXT
));
172 put_unaligned_le32(status
->vendor_radiotap_bitmap
, pos
);
176 /* the order of the following fields is important */
178 /* IEEE80211_RADIOTAP_TSFT */
179 if (ieee80211_have_rx_timestamp(status
)) {
181 while ((pos
- (u8
*)rthdr
) & 7)
184 ieee80211_calculate_rx_timestamp(local
, status
,
187 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT
);
191 /* IEEE80211_RADIOTAP_FLAGS */
192 if (has_fcs
&& (local
->hw
.flags
& IEEE80211_HW_RX_INCLUDES_FCS
))
193 *pos
|= IEEE80211_RADIOTAP_F_FCS
;
194 if (status
->flag
& (RX_FLAG_FAILED_FCS_CRC
| RX_FLAG_FAILED_PLCP_CRC
))
195 *pos
|= IEEE80211_RADIOTAP_F_BADFCS
;
196 if (status
->flag
& RX_FLAG_SHORTPRE
)
197 *pos
|= IEEE80211_RADIOTAP_F_SHORTPRE
;
200 /* IEEE80211_RADIOTAP_RATE */
201 if (!rate
|| status
->flag
& (RX_FLAG_HT
| RX_FLAG_VHT
)) {
203 * Without rate information don't add it. If we have,
204 * MCS information is a separate field in radiotap,
205 * added below. The byte here is needed as padding
206 * for the channel though, so initialise it to 0.
210 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE
);
211 *pos
= rate
->bitrate
/ 5;
215 /* IEEE80211_RADIOTAP_CHANNEL */
216 put_unaligned_le16(status
->freq
, pos
);
218 if (status
->band
== IEEE80211_BAND_5GHZ
)
219 put_unaligned_le16(IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_5GHZ
,
221 else if (status
->flag
& (RX_FLAG_HT
| RX_FLAG_VHT
))
222 put_unaligned_le16(IEEE80211_CHAN_DYN
| IEEE80211_CHAN_2GHZ
,
224 else if (rate
&& rate
->flags
& IEEE80211_RATE_ERP_G
)
225 put_unaligned_le16(IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_2GHZ
,
228 put_unaligned_le16(IEEE80211_CHAN_CCK
| IEEE80211_CHAN_2GHZ
,
231 put_unaligned_le16(IEEE80211_CHAN_2GHZ
, pos
);
234 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
235 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
&&
236 !(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
237 *pos
= status
->signal
;
239 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL
);
243 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
245 /* IEEE80211_RADIOTAP_ANTENNA */
246 *pos
= status
->antenna
;
249 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
251 /* IEEE80211_RADIOTAP_RX_FLAGS */
252 /* ensure 2 byte alignment for the 2 byte field as required */
253 if ((pos
- (u8
*)rthdr
) & 1)
255 if (status
->flag
& RX_FLAG_FAILED_PLCP_CRC
)
256 rx_flags
|= IEEE80211_RADIOTAP_F_RX_BADPLCP
;
257 put_unaligned_le16(rx_flags
, pos
);
260 if (status
->flag
& RX_FLAG_HT
) {
263 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS
);
264 *pos
++ = local
->hw
.radiotap_mcs_details
;
266 if (status
->flag
& RX_FLAG_SHORT_GI
)
267 *pos
|= IEEE80211_RADIOTAP_MCS_SGI
;
268 if (status
->flag
& RX_FLAG_40MHZ
)
269 *pos
|= IEEE80211_RADIOTAP_MCS_BW_40
;
270 if (status
->flag
& RX_FLAG_HT_GF
)
271 *pos
|= IEEE80211_RADIOTAP_MCS_FMT_GF
;
272 stbc
= (status
->flag
& RX_FLAG_STBC_MASK
) >> RX_FLAG_STBC_SHIFT
;
273 *pos
|= stbc
<< IEEE80211_RADIOTAP_MCS_STBC_SHIFT
;
275 *pos
++ = status
->rate_idx
;
278 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
281 /* ensure 4 byte alignment */
282 while ((pos
- (u8
*)rthdr
) & 3)
285 cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS
);
286 put_unaligned_le32(status
->ampdu_reference
, pos
);
288 if (status
->flag
& RX_FLAG_AMPDU_REPORT_ZEROLEN
)
289 flags
|= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN
;
290 if (status
->flag
& RX_FLAG_AMPDU_IS_ZEROLEN
)
291 flags
|= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN
;
292 if (status
->flag
& RX_FLAG_AMPDU_LAST_KNOWN
)
293 flags
|= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN
;
294 if (status
->flag
& RX_FLAG_AMPDU_IS_LAST
)
295 flags
|= IEEE80211_RADIOTAP_AMPDU_IS_LAST
;
296 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_ERROR
)
297 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR
;
298 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
299 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN
;
300 put_unaligned_le16(flags
, pos
);
302 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
303 *pos
++ = status
->ampdu_delimiter_crc
;
309 if (status
->flag
& RX_FLAG_VHT
) {
310 u16 known
= local
->hw
.radiotap_vht_details
;
312 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT
);
313 /* known field - how to handle 80+80? */
314 if (status
->flag
& RX_FLAG_80P80MHZ
)
315 known
&= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
;
316 put_unaligned_le16(known
, pos
);
319 if (status
->flag
& RX_FLAG_SHORT_GI
)
320 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_SGI
;
323 if (status
->flag
& RX_FLAG_80MHZ
)
325 else if (status
->flag
& RX_FLAG_80P80MHZ
)
326 *pos
++ = 0; /* marked not known above */
327 else if (status
->flag
& RX_FLAG_160MHZ
)
329 else if (status
->flag
& RX_FLAG_40MHZ
)
334 *pos
= (status
->rate_idx
<< 4) | status
->vht_nss
;
344 if (status
->vendor_radiotap_len
) {
345 /* ensure 2 byte alignment for the vendor field as required */
346 if ((pos
- (u8
*)rthdr
) & 1)
348 *pos
++ = status
->vendor_radiotap_oui
[0];
349 *pos
++ = status
->vendor_radiotap_oui
[1];
350 *pos
++ = status
->vendor_radiotap_oui
[2];
351 *pos
++ = status
->vendor_radiotap_subns
;
352 put_unaligned_le16(status
->vendor_radiotap_len
, pos
);
354 /* align the actual payload as requested */
355 while ((pos
- (u8
*)rthdr
) & (status
->vendor_radiotap_align
- 1))
361 * This function copies a received frame to all monitor interfaces and
362 * returns a cleaned-up SKB that no longer includes the FCS nor the
363 * radiotap header the driver might have added.
365 static struct sk_buff
*
366 ieee80211_rx_monitor(struct ieee80211_local
*local
, struct sk_buff
*origskb
,
367 struct ieee80211_rate
*rate
)
369 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(origskb
);
370 struct ieee80211_sub_if_data
*sdata
;
372 struct sk_buff
*skb
, *skb2
;
373 struct net_device
*prev_dev
= NULL
;
374 int present_fcs_len
= 0;
377 * First, we may need to make a copy of the skb because
378 * (1) we need to modify it for radiotap (if not present), and
379 * (2) the other RX handlers will modify the skb we got.
381 * We don't need to, of course, if we aren't going to return
382 * the SKB because it has a bad FCS/PLCP checksum.
385 if (local
->hw
.flags
& IEEE80211_HW_RX_INCLUDES_FCS
)
386 present_fcs_len
= FCS_LEN
;
388 /* ensure hdr->frame_control and vendor radiotap data are in skb head */
389 if (!pskb_may_pull(origskb
, 2 + status
->vendor_radiotap_len
)) {
390 dev_kfree_skb(origskb
);
394 if (!local
->monitors
) {
395 if (should_drop_frame(origskb
, present_fcs_len
)) {
396 dev_kfree_skb(origskb
);
400 return remove_monitor_info(local
, origskb
);
403 /* room for the radiotap header based on driver features */
404 needed_headroom
= ieee80211_rx_radiotap_space(local
, status
);
406 if (should_drop_frame(origskb
, present_fcs_len
)) {
407 /* only need to expand headroom if necessary */
412 * This shouldn't trigger often because most devices have an
413 * RX header they pull before we get here, and that should
414 * be big enough for our radiotap information. We should
415 * probably export the length to drivers so that we can have
416 * them allocate enough headroom to start with.
418 if (skb_headroom(skb
) < needed_headroom
&&
419 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
)) {
425 * Need to make a copy and possibly remove radiotap header
426 * and FCS from the original.
428 skb
= skb_copy_expand(origskb
, needed_headroom
, 0, GFP_ATOMIC
);
430 origskb
= remove_monitor_info(local
, origskb
);
436 /* prepend radiotap information */
437 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, needed_headroom
,
440 skb_reset_mac_header(skb
);
441 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
442 skb
->pkt_type
= PACKET_OTHERHOST
;
443 skb
->protocol
= htons(ETH_P_802_2
);
445 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
446 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
)
449 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
)
452 if (!ieee80211_sdata_running(sdata
))
456 skb2
= skb_clone(skb
, GFP_ATOMIC
);
458 skb2
->dev
= prev_dev
;
459 netif_receive_skb(skb2
);
463 prev_dev
= sdata
->dev
;
464 sdata
->dev
->stats
.rx_packets
++;
465 sdata
->dev
->stats
.rx_bytes
+= skb
->len
;
470 netif_receive_skb(skb
);
477 static void ieee80211_parse_qos(struct ieee80211_rx_data
*rx
)
479 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
480 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
481 int tid
, seqno_idx
, security_idx
;
483 /* does the frame have a qos control field? */
484 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
485 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
486 /* frame has qos control */
487 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
488 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
489 status
->rx_flags
|= IEEE80211_RX_AMSDU
;
495 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
497 * Sequence numbers for management frames, QoS data
498 * frames with a broadcast/multicast address in the
499 * Address 1 field, and all non-QoS data frames sent
500 * by QoS STAs are assigned using an additional single
501 * modulo-4096 counter, [...]
503 * We also use that counter for non-QoS STAs.
505 seqno_idx
= IEEE80211_NUM_TIDS
;
507 if (ieee80211_is_mgmt(hdr
->frame_control
))
508 security_idx
= IEEE80211_NUM_TIDS
;
512 rx
->seqno_idx
= seqno_idx
;
513 rx
->security_idx
= security_idx
;
514 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
515 * For now, set skb->priority to 0 for other cases. */
516 rx
->skb
->priority
= (tid
> 7) ? 0 : tid
;
520 * DOC: Packet alignment
522 * Drivers always need to pass packets that are aligned to two-byte boundaries
525 * Additionally, should, if possible, align the payload data in a way that
526 * guarantees that the contained IP header is aligned to a four-byte
527 * boundary. In the case of regular frames, this simply means aligning the
528 * payload to a four-byte boundary (because either the IP header is directly
529 * contained, or IV/RFC1042 headers that have a length divisible by four are
530 * in front of it). If the payload data is not properly aligned and the
531 * architecture doesn't support efficient unaligned operations, mac80211
532 * will align the data.
534 * With A-MSDU frames, however, the payload data address must yield two modulo
535 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
536 * push the IP header further back to a multiple of four again. Thankfully, the
537 * specs were sane enough this time around to require padding each A-MSDU
538 * subframe to a length that is a multiple of four.
540 * Padding like Atheros hardware adds which is between the 802.11 header and
541 * the payload is not supported, the driver is required to move the 802.11
542 * header to be directly in front of the payload in that case.
544 static void ieee80211_verify_alignment(struct ieee80211_rx_data
*rx
)
546 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
547 WARN_ONCE((unsigned long)rx
->skb
->data
& 1,
548 "unaligned packet at 0x%p\n", rx
->skb
->data
);
555 static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff
*skb
)
557 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
559 if (skb
->len
< 24 || is_multicast_ether_addr(hdr
->addr1
))
562 return ieee80211_is_robust_mgmt_frame(hdr
);
566 static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff
*skb
)
568 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
570 if (skb
->len
< 24 || !is_multicast_ether_addr(hdr
->addr1
))
573 return ieee80211_is_robust_mgmt_frame(hdr
);
577 /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
578 static int ieee80211_get_mmie_keyidx(struct sk_buff
*skb
)
580 struct ieee80211_mgmt
*hdr
= (struct ieee80211_mgmt
*) skb
->data
;
581 struct ieee80211_mmie
*mmie
;
583 if (skb
->len
< 24 + sizeof(*mmie
) || !is_multicast_ether_addr(hdr
->da
))
586 if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr
*) hdr
))
587 return -1; /* not a robust management frame */
589 mmie
= (struct ieee80211_mmie
*)
590 (skb
->data
+ skb
->len
- sizeof(*mmie
));
591 if (mmie
->element_id
!= WLAN_EID_MMIE
||
592 mmie
->length
!= sizeof(*mmie
) - 2)
595 return le16_to_cpu(mmie
->key_id
);
598 static ieee80211_rx_result
ieee80211_rx_mesh_check(struct ieee80211_rx_data
*rx
)
600 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
601 char *dev_addr
= rx
->sdata
->vif
.addr
;
603 if (ieee80211_is_data(hdr
->frame_control
)) {
604 if (is_multicast_ether_addr(hdr
->addr1
)) {
605 if (ieee80211_has_tods(hdr
->frame_control
) ||
606 !ieee80211_has_fromds(hdr
->frame_control
))
607 return RX_DROP_MONITOR
;
608 if (ether_addr_equal(hdr
->addr3
, dev_addr
))
609 return RX_DROP_MONITOR
;
611 if (!ieee80211_has_a4(hdr
->frame_control
))
612 return RX_DROP_MONITOR
;
613 if (ether_addr_equal(hdr
->addr4
, dev_addr
))
614 return RX_DROP_MONITOR
;
618 /* If there is not an established peer link and this is not a peer link
619 * establisment frame, beacon or probe, drop the frame.
622 if (!rx
->sta
|| sta_plink_state(rx
->sta
) != NL80211_PLINK_ESTAB
) {
623 struct ieee80211_mgmt
*mgmt
;
625 if (!ieee80211_is_mgmt(hdr
->frame_control
))
626 return RX_DROP_MONITOR
;
628 if (ieee80211_is_action(hdr
->frame_control
)) {
631 /* make sure category field is present */
632 if (rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
)
633 return RX_DROP_MONITOR
;
635 mgmt
= (struct ieee80211_mgmt
*)hdr
;
636 category
= mgmt
->u
.action
.category
;
637 if (category
!= WLAN_CATEGORY_MESH_ACTION
&&
638 category
!= WLAN_CATEGORY_SELF_PROTECTED
)
639 return RX_DROP_MONITOR
;
643 if (ieee80211_is_probe_req(hdr
->frame_control
) ||
644 ieee80211_is_probe_resp(hdr
->frame_control
) ||
645 ieee80211_is_beacon(hdr
->frame_control
) ||
646 ieee80211_is_auth(hdr
->frame_control
))
649 return RX_DROP_MONITOR
;
655 static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data
*sdata
,
656 struct tid_ampdu_rx
*tid_agg_rx
,
658 struct sk_buff_head
*frames
)
660 struct sk_buff
*skb
= tid_agg_rx
->reorder_buf
[index
];
661 struct ieee80211_rx_status
*status
;
663 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
668 /* release the frame from the reorder ring buffer */
669 tid_agg_rx
->stored_mpdu_num
--;
670 tid_agg_rx
->reorder_buf
[index
] = NULL
;
671 status
= IEEE80211_SKB_RXCB(skb
);
672 status
->rx_flags
|= IEEE80211_RX_DEFERRED_RELEASE
;
673 __skb_queue_tail(frames
, skb
);
676 tid_agg_rx
->head_seq_num
= ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
679 static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data
*sdata
,
680 struct tid_ampdu_rx
*tid_agg_rx
,
682 struct sk_buff_head
*frames
)
686 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
688 while (ieee80211_sn_less(tid_agg_rx
->head_seq_num
, head_seq_num
)) {
689 index
= ieee80211_sn_sub(tid_agg_rx
->head_seq_num
,
691 tid_agg_rx
->buf_size
;
692 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
698 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
699 * the skb was added to the buffer longer than this time ago, the earlier
700 * frames that have not yet been received are assumed to be lost and the skb
701 * can be released for processing. This may also release other skb's from the
702 * reorder buffer if there are no additional gaps between the frames.
704 * Callers must hold tid_agg_rx->reorder_lock.
706 #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
708 static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data
*sdata
,
709 struct tid_ampdu_rx
*tid_agg_rx
,
710 struct sk_buff_head
*frames
)
714 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
716 /* release the buffer until next missing frame */
717 index
= ieee80211_sn_sub(tid_agg_rx
->head_seq_num
,
718 tid_agg_rx
->ssn
) % tid_agg_rx
->buf_size
;
719 if (!tid_agg_rx
->reorder_buf
[index
] &&
720 tid_agg_rx
->stored_mpdu_num
) {
722 * No buffers ready to be released, but check whether any
723 * frames in the reorder buffer have timed out.
726 for (j
= (index
+ 1) % tid_agg_rx
->buf_size
; j
!= index
;
727 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
728 if (!tid_agg_rx
->reorder_buf
[j
]) {
733 !time_after(jiffies
, tid_agg_rx
->reorder_time
[j
] +
734 HT_RX_REORDER_BUF_TIMEOUT
))
735 goto set_release_timer
;
737 ht_dbg_ratelimited(sdata
,
738 "release an RX reorder frame due to timeout on earlier frames\n");
739 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, j
,
743 * Increment the head seq# also for the skipped slots.
745 tid_agg_rx
->head_seq_num
=
746 (tid_agg_rx
->head_seq_num
+
747 skipped
) & IEEE80211_SN_MASK
;
750 } else while (tid_agg_rx
->reorder_buf
[index
]) {
751 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
753 index
= ieee80211_sn_sub(tid_agg_rx
->head_seq_num
,
755 tid_agg_rx
->buf_size
;
758 if (tid_agg_rx
->stored_mpdu_num
) {
759 j
= index
= ieee80211_sn_sub(tid_agg_rx
->head_seq_num
,
761 tid_agg_rx
->buf_size
;
763 for (; j
!= (index
- 1) % tid_agg_rx
->buf_size
;
764 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
765 if (tid_agg_rx
->reorder_buf
[j
])
771 mod_timer(&tid_agg_rx
->reorder_timer
,
772 tid_agg_rx
->reorder_time
[j
] + 1 +
773 HT_RX_REORDER_BUF_TIMEOUT
);
775 del_timer(&tid_agg_rx
->reorder_timer
);
780 * As this function belongs to the RX path it must be under
781 * rcu_read_lock protection. It returns false if the frame
782 * can be processed immediately, true if it was consumed.
784 static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data
*sdata
,
785 struct tid_ampdu_rx
*tid_agg_rx
,
787 struct sk_buff_head
*frames
)
789 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
790 u16 sc
= le16_to_cpu(hdr
->seq_ctrl
);
791 u16 mpdu_seq_num
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
792 u16 head_seq_num
, buf_size
;
796 spin_lock(&tid_agg_rx
->reorder_lock
);
798 buf_size
= tid_agg_rx
->buf_size
;
799 head_seq_num
= tid_agg_rx
->head_seq_num
;
801 /* frame with out of date sequence number */
802 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
808 * If frame the sequence number exceeds our buffering window
809 * size release some previous frames to make room for this one.
811 if (!ieee80211_sn_less(mpdu_seq_num
, head_seq_num
+ buf_size
)) {
812 head_seq_num
= ieee80211_sn_inc(
813 ieee80211_sn_sub(mpdu_seq_num
, buf_size
));
814 /* release stored frames up to new head to stack */
815 ieee80211_release_reorder_frames(sdata
, tid_agg_rx
,
816 head_seq_num
, frames
);
819 /* Now the new frame is always in the range of the reordering buffer */
821 index
= ieee80211_sn_sub(mpdu_seq_num
,
822 tid_agg_rx
->ssn
) % tid_agg_rx
->buf_size
;
824 /* check if we already stored this frame */
825 if (tid_agg_rx
->reorder_buf
[index
]) {
831 * If the current MPDU is in the right order and nothing else
832 * is stored we can process it directly, no need to buffer it.
833 * If it is first but there's something stored, we may be able
834 * to release frames after this one.
836 if (mpdu_seq_num
== tid_agg_rx
->head_seq_num
&&
837 tid_agg_rx
->stored_mpdu_num
== 0) {
838 tid_agg_rx
->head_seq_num
=
839 ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
844 /* put the frame in the reordering buffer */
845 tid_agg_rx
->reorder_buf
[index
] = skb
;
846 tid_agg_rx
->reorder_time
[index
] = jiffies
;
847 tid_agg_rx
->stored_mpdu_num
++;
848 ieee80211_sta_reorder_release(sdata
, tid_agg_rx
, frames
);
851 spin_unlock(&tid_agg_rx
->reorder_lock
);
856 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
857 * true if the MPDU was buffered, false if it should be processed.
859 static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data
*rx
,
860 struct sk_buff_head
*frames
)
862 struct sk_buff
*skb
= rx
->skb
;
863 struct ieee80211_local
*local
= rx
->local
;
864 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
865 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
866 struct sta_info
*sta
= rx
->sta
;
867 struct tid_ampdu_rx
*tid_agg_rx
;
871 if (!ieee80211_is_data_qos(hdr
->frame_control
))
875 * filter the QoS data rx stream according to
876 * STA/TID and check if this STA/TID is on aggregation
882 ack_policy
= *ieee80211_get_qos_ctl(hdr
) &
883 IEEE80211_QOS_CTL_ACK_POLICY_MASK
;
884 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
886 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
890 /* qos null data frames are excluded */
891 if (unlikely(hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_NULLFUNC
)))
894 /* not part of a BA session */
895 if (ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK
&&
896 ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_NORMAL
)
899 /* not actually part of this BA session */
900 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
903 /* new, potentially un-ordered, ampdu frame - process it */
905 /* reset session timer */
906 if (tid_agg_rx
->timeout
)
907 tid_agg_rx
->last_rx
= jiffies
;
909 /* if this mpdu is fragmented - terminate rx aggregation session */
910 sc
= le16_to_cpu(hdr
->seq_ctrl
);
911 if (sc
& IEEE80211_SCTL_FRAG
) {
912 skb
->pkt_type
= IEEE80211_SDATA_QUEUE_TYPE_FRAME
;
913 skb_queue_tail(&rx
->sdata
->skb_queue
, skb
);
914 ieee80211_queue_work(&local
->hw
, &rx
->sdata
->work
);
919 * No locking needed -- we will only ever process one
920 * RX packet at a time, and thus own tid_agg_rx. All
921 * other code manipulating it needs to (and does) make
922 * sure that we cannot get to it any more before doing
925 if (ieee80211_sta_manage_reorder_buf(rx
->sdata
, tid_agg_rx
, skb
,
930 __skb_queue_tail(frames
, skb
);
933 static ieee80211_rx_result debug_noinline
934 ieee80211_rx_h_check(struct ieee80211_rx_data
*rx
)
936 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
937 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
939 /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
940 if (rx
->sta
&& !is_multicast_ether_addr(hdr
->addr1
)) {
941 if (unlikely(ieee80211_has_retry(hdr
->frame_control
) &&
942 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] ==
944 if (status
->rx_flags
& IEEE80211_RX_RA_MATCH
) {
945 rx
->local
->dot11FrameDuplicateCount
++;
946 rx
->sta
->num_duplicates
++;
948 return RX_DROP_UNUSABLE
;
950 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] = hdr
->seq_ctrl
;
953 if (unlikely(rx
->skb
->len
< 16)) {
954 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_short
);
955 return RX_DROP_MONITOR
;
958 /* Drop disallowed frame classes based on STA auth/assoc state;
959 * IEEE 802.11, Chap 5.5.
961 * mac80211 filters only based on association state, i.e. it drops
962 * Class 3 frames from not associated stations. hostapd sends
963 * deauth/disassoc frames when needed. In addition, hostapd is
964 * responsible for filtering on both auth and assoc states.
967 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
968 return ieee80211_rx_mesh_check(rx
);
970 if (unlikely((ieee80211_is_data(hdr
->frame_control
) ||
971 ieee80211_is_pspoll(hdr
->frame_control
)) &&
972 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
973 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&&
974 (!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_ASSOC
)))) {
976 * accept port control frames from the AP even when it's not
977 * yet marked ASSOC to prevent a race where we don't set the
978 * assoc bit quickly enough before it sends the first frame
980 if (rx
->sta
&& rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
981 ieee80211_is_data_present(hdr
->frame_control
)) {
985 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
987 if (rx
->skb
->len
< hdrlen
+ 8)
988 return RX_DROP_MONITOR
;
990 skb_copy_bits(rx
->skb
, hdrlen
+ 6, ðertype
, 2);
991 if (ethertype
== rx
->sdata
->control_port_protocol
)
995 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
996 cfg80211_rx_spurious_frame(rx
->sdata
->dev
,
999 return RX_DROP_UNUSABLE
;
1001 return RX_DROP_MONITOR
;
1008 static ieee80211_rx_result debug_noinline
1009 ieee80211_rx_h_decrypt(struct ieee80211_rx_data
*rx
)
1011 struct sk_buff
*skb
= rx
->skb
;
1012 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1013 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1016 ieee80211_rx_result result
= RX_DROP_UNUSABLE
;
1017 struct ieee80211_key
*sta_ptk
= NULL
;
1018 int mmie_keyidx
= -1;
1024 * There are four types of keys:
1025 * - GTK (group keys)
1026 * - IGTK (group keys for management frames)
1027 * - PTK (pairwise keys)
1028 * - STK (station-to-station pairwise keys)
1030 * When selecting a key, we have to distinguish between multicast
1031 * (including broadcast) and unicast frames, the latter can only
1032 * use PTKs and STKs while the former always use GTKs and IGTKs.
1033 * Unless, of course, actual WEP keys ("pre-RSNA") are used, then
1034 * unicast frames can also use key indices like GTKs. Hence, if we
1035 * don't have a PTK/STK we check the key index for a WEP key.
1037 * Note that in a regular BSS, multicast frames are sent by the
1038 * AP only, associated stations unicast the frame to the AP first
1039 * which then multicasts it on their behalf.
1041 * There is also a slight problem in IBSS mode: GTKs are negotiated
1042 * with each station, that is something we don't currently handle.
1043 * The spec seems to expect that one negotiates the same key with
1044 * every station but there's no such requirement; VLANs could be
1049 * No point in finding a key and decrypting if the frame is neither
1050 * addressed to us nor a multicast frame.
1052 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
1055 /* start without a key */
1059 sta_ptk
= rcu_dereference(rx
->sta
->ptk
);
1061 fc
= hdr
->frame_control
;
1063 if (!ieee80211_has_protected(fc
))
1064 mmie_keyidx
= ieee80211_get_mmie_keyidx(rx
->skb
);
1066 if (!is_multicast_ether_addr(hdr
->addr1
) && sta_ptk
) {
1068 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1069 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1071 /* Skip decryption if the frame is not protected. */
1072 if (!ieee80211_has_protected(fc
))
1074 } else if (mmie_keyidx
>= 0) {
1075 /* Broadcast/multicast robust management frame / BIP */
1076 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1077 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1080 if (mmie_keyidx
< NUM_DEFAULT_KEYS
||
1081 mmie_keyidx
>= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
)
1082 return RX_DROP_MONITOR
; /* unexpected BIP keyidx */
1084 rx
->key
= rcu_dereference(rx
->sta
->gtk
[mmie_keyidx
]);
1086 rx
->key
= rcu_dereference(rx
->sdata
->keys
[mmie_keyidx
]);
1087 } else if (!ieee80211_has_protected(fc
)) {
1089 * The frame was not protected, so skip decryption. However, we
1090 * need to set rx->key if there is a key that could have been
1091 * used so that the frame may be dropped if encryption would
1092 * have been expected.
1094 struct ieee80211_key
*key
= NULL
;
1095 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1098 if (ieee80211_is_mgmt(fc
) &&
1099 is_multicast_ether_addr(hdr
->addr1
) &&
1100 (key
= rcu_dereference(rx
->sdata
->default_mgmt_key
)))
1104 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
1105 key
= rcu_dereference(rx
->sta
->gtk
[i
]);
1111 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
1112 key
= rcu_dereference(sdata
->keys
[i
]);
1124 * The device doesn't give us the IV so we won't be
1125 * able to look up the key. That's ok though, we
1126 * don't need to decrypt the frame, we just won't
1127 * be able to keep statistics accurate.
1128 * Except for key threshold notifications, should
1129 * we somehow allow the driver to tell us which key
1130 * the hardware used if this flag is set?
1132 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1133 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1136 hdrlen
= ieee80211_hdrlen(fc
);
1138 if (rx
->skb
->len
< 8 + hdrlen
)
1139 return RX_DROP_UNUSABLE
; /* TODO: count this? */
1142 * no need to call ieee80211_wep_get_keyidx,
1143 * it verifies a bunch of things we've done already
1145 skb_copy_bits(rx
->skb
, hdrlen
+ 3, &keyid
, 1);
1146 keyidx
= keyid
>> 6;
1148 /* check per-station GTK first, if multicast packet */
1149 if (is_multicast_ether_addr(hdr
->addr1
) && rx
->sta
)
1150 rx
->key
= rcu_dereference(rx
->sta
->gtk
[keyidx
]);
1152 /* if not found, try default key */
1154 rx
->key
= rcu_dereference(rx
->sdata
->keys
[keyidx
]);
1157 * RSNA-protected unicast frames should always be
1158 * sent with pairwise or station-to-station keys,
1159 * but for WEP we allow using a key index as well.
1162 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP40
&&
1163 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP104
&&
1164 !is_multicast_ether_addr(hdr
->addr1
))
1170 if (unlikely(rx
->key
->flags
& KEY_FLAG_TAINTED
))
1171 return RX_DROP_MONITOR
;
1173 rx
->key
->tx_rx_count
++;
1174 /* TODO: add threshold stuff again */
1176 return RX_DROP_MONITOR
;
1179 switch (rx
->key
->conf
.cipher
) {
1180 case WLAN_CIPHER_SUITE_WEP40
:
1181 case WLAN_CIPHER_SUITE_WEP104
:
1182 result
= ieee80211_crypto_wep_decrypt(rx
);
1184 case WLAN_CIPHER_SUITE_TKIP
:
1185 result
= ieee80211_crypto_tkip_decrypt(rx
);
1187 case WLAN_CIPHER_SUITE_CCMP
:
1188 result
= ieee80211_crypto_ccmp_decrypt(rx
);
1190 case WLAN_CIPHER_SUITE_AES_CMAC
:
1191 result
= ieee80211_crypto_aes_cmac_decrypt(rx
);
1195 * We can reach here only with HW-only algorithms
1196 * but why didn't it decrypt the frame?!
1198 return RX_DROP_UNUSABLE
;
1201 /* the hdr variable is invalid after the decrypt handlers */
1203 /* either the frame has been decrypted or will be dropped */
1204 status
->flag
|= RX_FLAG_DECRYPTED
;
1209 static ieee80211_rx_result debug_noinline
1210 ieee80211_rx_h_check_more_data(struct ieee80211_rx_data
*rx
)
1212 struct ieee80211_local
*local
;
1213 struct ieee80211_hdr
*hdr
;
1214 struct sk_buff
*skb
;
1218 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1220 if (!local
->pspolling
)
1223 if (!ieee80211_has_fromds(hdr
->frame_control
))
1224 /* this is not from AP */
1227 if (!ieee80211_is_data(hdr
->frame_control
))
1230 if (!ieee80211_has_moredata(hdr
->frame_control
)) {
1231 /* AP has no more frames buffered for us */
1232 local
->pspolling
= false;
1236 /* more data bit is set, let's request a new frame from the AP */
1237 ieee80211_send_pspoll(local
, rx
->sdata
);
1242 static void sta_ps_start(struct sta_info
*sta
)
1244 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1245 struct ieee80211_local
*local
= sdata
->local
;
1248 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1249 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1250 ps
= &sdata
->bss
->ps
;
1254 atomic_inc(&ps
->num_sta_ps
);
1255 set_sta_flag(sta
, WLAN_STA_PS_STA
);
1256 if (!(local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
))
1257 drv_sta_notify(local
, sdata
, STA_NOTIFY_SLEEP
, &sta
->sta
);
1258 ps_dbg(sdata
, "STA %pM aid %d enters power save mode\n",
1259 sta
->sta
.addr
, sta
->sta
.aid
);
1262 static void sta_ps_end(struct sta_info
*sta
)
1264 ps_dbg(sta
->sdata
, "STA %pM aid %d exits power save mode\n",
1265 sta
->sta
.addr
, sta
->sta
.aid
);
1267 if (test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) {
1268 ps_dbg(sta
->sdata
, "STA %pM aid %d driver-ps-blocked\n",
1269 sta
->sta
.addr
, sta
->sta
.aid
);
1273 ieee80211_sta_ps_deliver_wakeup(sta
);
1276 int ieee80211_sta_ps_transition(struct ieee80211_sta
*sta
, bool start
)
1278 struct sta_info
*sta_inf
= container_of(sta
, struct sta_info
, sta
);
1281 WARN_ON(!(sta_inf
->local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
));
1283 /* Don't let the same PS state be set twice */
1284 in_ps
= test_sta_flag(sta_inf
, WLAN_STA_PS_STA
);
1285 if ((start
&& in_ps
) || (!start
&& !in_ps
))
1289 sta_ps_start(sta_inf
);
1291 sta_ps_end(sta_inf
);
1295 EXPORT_SYMBOL(ieee80211_sta_ps_transition
);
1297 static ieee80211_rx_result debug_noinline
1298 ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data
*rx
)
1300 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1301 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
1302 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1305 if (!rx
->sta
|| !(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
1308 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
1309 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
)
1313 * The device handles station powersave, so don't do anything about
1314 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1315 * it to mac80211 since they're handled.)
1317 if (sdata
->local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
)
1321 * Don't do anything if the station isn't already asleep. In
1322 * the uAPSD case, the station will probably be marked asleep,
1323 * in the PS-Poll case the station must be confused ...
1325 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_STA
))
1328 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
))) {
1329 if (!test_sta_flag(rx
->sta
, WLAN_STA_SP
)) {
1330 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_DRIVER
))
1331 ieee80211_sta_ps_deliver_poll_response(rx
->sta
);
1333 set_sta_flag(rx
->sta
, WLAN_STA_PSPOLL
);
1336 /* Free PS Poll skb here instead of returning RX_DROP that would
1337 * count as an dropped frame. */
1338 dev_kfree_skb(rx
->skb
);
1341 } else if (!ieee80211_has_morefrags(hdr
->frame_control
) &&
1342 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1343 ieee80211_has_pm(hdr
->frame_control
) &&
1344 (ieee80211_is_data_qos(hdr
->frame_control
) ||
1345 ieee80211_is_qos_nullfunc(hdr
->frame_control
))) {
1346 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
1347 ac
= ieee802_1d_to_ac
[tid
& 7];
1350 * If this AC is not trigger-enabled do nothing.
1352 * NB: This could/should check a separate bitmap of trigger-
1353 * enabled queues, but for now we only implement uAPSD w/o
1354 * TSPEC changes to the ACs, so they're always the same.
1356 if (!(rx
->sta
->sta
.uapsd_queues
& BIT(ac
)))
1359 /* if we are in a service period, do nothing */
1360 if (test_sta_flag(rx
->sta
, WLAN_STA_SP
))
1363 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_DRIVER
))
1364 ieee80211_sta_ps_deliver_uapsd(rx
->sta
);
1366 set_sta_flag(rx
->sta
, WLAN_STA_UAPSD
);
1372 static ieee80211_rx_result debug_noinline
1373 ieee80211_rx_h_sta_process(struct ieee80211_rx_data
*rx
)
1375 struct sta_info
*sta
= rx
->sta
;
1376 struct sk_buff
*skb
= rx
->skb
;
1377 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1378 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1385 * Update last_rx only for IBSS packets which are for the current
1386 * BSSID and for station already AUTHORIZED to avoid keeping the
1387 * current IBSS network alive in cases where other STAs start
1388 * using different BSSID. This will also give the station another
1389 * chance to restart the authentication/authorization in case
1390 * something went wrong the first time.
1392 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
1393 u8
*bssid
= ieee80211_get_bssid(hdr
, rx
->skb
->len
,
1394 NL80211_IFTYPE_ADHOC
);
1395 if (ether_addr_equal(bssid
, rx
->sdata
->u
.ibss
.bssid
) &&
1396 test_sta_flag(sta
, WLAN_STA_AUTHORIZED
)) {
1397 sta
->last_rx
= jiffies
;
1398 if (ieee80211_is_data(hdr
->frame_control
)) {
1399 sta
->last_rx_rate_idx
= status
->rate_idx
;
1400 sta
->last_rx_rate_flag
= status
->flag
;
1401 sta
->last_rx_rate_vht_nss
= status
->vht_nss
;
1404 } else if (!is_multicast_ether_addr(hdr
->addr1
)) {
1406 * Mesh beacons will update last_rx when if they are found to
1407 * match the current local configuration when processed.
1409 sta
->last_rx
= jiffies
;
1410 if (ieee80211_is_data(hdr
->frame_control
)) {
1411 sta
->last_rx_rate_idx
= status
->rate_idx
;
1412 sta
->last_rx_rate_flag
= status
->flag
;
1413 sta
->last_rx_rate_vht_nss
= status
->vht_nss
;
1417 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
1420 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
1421 ieee80211_sta_rx_notify(rx
->sdata
, hdr
);
1423 sta
->rx_fragments
++;
1424 sta
->rx_bytes
+= rx
->skb
->len
;
1425 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
1426 sta
->last_signal
= status
->signal
;
1427 ewma_add(&sta
->avg_signal
, -status
->signal
);
1430 if (status
->chains
) {
1431 sta
->chains
= status
->chains
;
1432 for (i
= 0; i
< ARRAY_SIZE(status
->chain_signal
); i
++) {
1433 int signal
= status
->chain_signal
[i
];
1435 if (!(status
->chains
& BIT(i
)))
1438 sta
->chain_signal_last
[i
] = signal
;
1439 ewma_add(&sta
->chain_signal_avg
[i
], -signal
);
1444 * Change STA power saving mode only at the end of a frame
1445 * exchange sequence.
1447 if (!(sta
->local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
) &&
1448 !ieee80211_has_morefrags(hdr
->frame_control
) &&
1449 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1450 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1451 rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)) {
1452 if (test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1454 * Ignore doze->wake transitions that are
1455 * indicated by non-data frames, the standard
1456 * is unclear here, but for example going to
1457 * PS mode and then scanning would cause a
1458 * doze->wake transition for the probe request,
1459 * and that is clearly undesirable.
1461 if (ieee80211_is_data(hdr
->frame_control
) &&
1462 !ieee80211_has_pm(hdr
->frame_control
))
1465 if (ieee80211_has_pm(hdr
->frame_control
))
1470 /* mesh power save support */
1471 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1472 ieee80211_mps_rx_h_sta_process(sta
, hdr
);
1475 * Drop (qos-)data::nullfunc frames silently, since they
1476 * are used only to control station power saving mode.
1478 if (ieee80211_is_nullfunc(hdr
->frame_control
) ||
1479 ieee80211_is_qos_nullfunc(hdr
->frame_control
)) {
1480 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_nullfunc
);
1483 * If we receive a 4-addr nullfunc frame from a STA
1484 * that was not moved to a 4-addr STA vlan yet send
1485 * the event to userspace and for older hostapd drop
1486 * the frame to the monitor interface.
1488 if (ieee80211_has_a4(hdr
->frame_control
) &&
1489 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1490 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1491 !rx
->sdata
->u
.vlan
.sta
))) {
1492 if (!test_and_set_sta_flag(sta
, WLAN_STA_4ADDR_EVENT
))
1493 cfg80211_rx_unexpected_4addr_frame(
1494 rx
->sdata
->dev
, sta
->sta
.addr
,
1496 return RX_DROP_MONITOR
;
1499 * Update counter and free packet here to avoid
1500 * counting this as a dropped packed.
1503 dev_kfree_skb(rx
->skb
);
1508 } /* ieee80211_rx_h_sta_process */
1510 static inline struct ieee80211_fragment_entry
*
1511 ieee80211_reassemble_add(struct ieee80211_sub_if_data
*sdata
,
1512 unsigned int frag
, unsigned int seq
, int rx_queue
,
1513 struct sk_buff
**skb
)
1515 struct ieee80211_fragment_entry
*entry
;
1517 entry
= &sdata
->fragments
[sdata
->fragment_next
++];
1518 if (sdata
->fragment_next
>= IEEE80211_FRAGMENT_MAX
)
1519 sdata
->fragment_next
= 0;
1521 if (!skb_queue_empty(&entry
->skb_list
))
1522 __skb_queue_purge(&entry
->skb_list
);
1524 __skb_queue_tail(&entry
->skb_list
, *skb
); /* no need for locking */
1526 entry
->first_frag_time
= jiffies
;
1528 entry
->rx_queue
= rx_queue
;
1529 entry
->last_frag
= frag
;
1531 entry
->extra_len
= 0;
1536 static inline struct ieee80211_fragment_entry
*
1537 ieee80211_reassemble_find(struct ieee80211_sub_if_data
*sdata
,
1538 unsigned int frag
, unsigned int seq
,
1539 int rx_queue
, struct ieee80211_hdr
*hdr
)
1541 struct ieee80211_fragment_entry
*entry
;
1544 idx
= sdata
->fragment_next
;
1545 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++) {
1546 struct ieee80211_hdr
*f_hdr
;
1550 idx
= IEEE80211_FRAGMENT_MAX
- 1;
1552 entry
= &sdata
->fragments
[idx
];
1553 if (skb_queue_empty(&entry
->skb_list
) || entry
->seq
!= seq
||
1554 entry
->rx_queue
!= rx_queue
||
1555 entry
->last_frag
+ 1 != frag
)
1558 f_hdr
= (struct ieee80211_hdr
*)entry
->skb_list
.next
->data
;
1561 * Check ftype and addresses are equal, else check next fragment
1563 if (((hdr
->frame_control
^ f_hdr
->frame_control
) &
1564 cpu_to_le16(IEEE80211_FCTL_FTYPE
)) ||
1565 !ether_addr_equal(hdr
->addr1
, f_hdr
->addr1
) ||
1566 !ether_addr_equal(hdr
->addr2
, f_hdr
->addr2
))
1569 if (time_after(jiffies
, entry
->first_frag_time
+ 2 * HZ
)) {
1570 __skb_queue_purge(&entry
->skb_list
);
1579 static ieee80211_rx_result debug_noinline
1580 ieee80211_rx_h_defragment(struct ieee80211_rx_data
*rx
)
1582 struct ieee80211_hdr
*hdr
;
1585 unsigned int frag
, seq
;
1586 struct ieee80211_fragment_entry
*entry
;
1587 struct sk_buff
*skb
;
1588 struct ieee80211_rx_status
*status
;
1590 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1591 fc
= hdr
->frame_control
;
1593 if (ieee80211_is_ctl(fc
))
1596 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1597 frag
= sc
& IEEE80211_SCTL_FRAG
;
1599 if (likely((!ieee80211_has_morefrags(fc
) && frag
== 0) ||
1600 is_multicast_ether_addr(hdr
->addr1
))) {
1601 /* not fragmented */
1604 I802_DEBUG_INC(rx
->local
->rx_handlers_fragments
);
1606 if (skb_linearize(rx
->skb
))
1607 return RX_DROP_UNUSABLE
;
1610 * skb_linearize() might change the skb->data and
1611 * previously cached variables (in this case, hdr) need to
1612 * be refreshed with the new data.
1614 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1615 seq
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
1618 /* This is the first fragment of a new frame. */
1619 entry
= ieee80211_reassemble_add(rx
->sdata
, frag
, seq
,
1620 rx
->seqno_idx
, &(rx
->skb
));
1621 if (rx
->key
&& rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP
&&
1622 ieee80211_has_protected(fc
)) {
1623 int queue
= rx
->security_idx
;
1624 /* Store CCMP PN so that we can verify that the next
1625 * fragment has a sequential PN value. */
1627 memcpy(entry
->last_pn
,
1628 rx
->key
->u
.ccmp
.rx_pn
[queue
],
1629 IEEE80211_CCMP_PN_LEN
);
1634 /* This is a fragment for a frame that should already be pending in
1635 * fragment cache. Add this fragment to the end of the pending entry.
1637 entry
= ieee80211_reassemble_find(rx
->sdata
, frag
, seq
,
1638 rx
->seqno_idx
, hdr
);
1640 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
1641 return RX_DROP_MONITOR
;
1644 /* Verify that MPDUs within one MSDU have sequential PN values.
1645 * (IEEE 802.11i, 8.3.3.4.5) */
1648 u8 pn
[IEEE80211_CCMP_PN_LEN
], *rpn
;
1650 if (!rx
->key
|| rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_CCMP
)
1651 return RX_DROP_UNUSABLE
;
1652 memcpy(pn
, entry
->last_pn
, IEEE80211_CCMP_PN_LEN
);
1653 for (i
= IEEE80211_CCMP_PN_LEN
- 1; i
>= 0; i
--) {
1658 queue
= rx
->security_idx
;
1659 rpn
= rx
->key
->u
.ccmp
.rx_pn
[queue
];
1660 if (memcmp(pn
, rpn
, IEEE80211_CCMP_PN_LEN
))
1661 return RX_DROP_UNUSABLE
;
1662 memcpy(entry
->last_pn
, pn
, IEEE80211_CCMP_PN_LEN
);
1665 skb_pull(rx
->skb
, ieee80211_hdrlen(fc
));
1666 __skb_queue_tail(&entry
->skb_list
, rx
->skb
);
1667 entry
->last_frag
= frag
;
1668 entry
->extra_len
+= rx
->skb
->len
;
1669 if (ieee80211_has_morefrags(fc
)) {
1674 rx
->skb
= __skb_dequeue(&entry
->skb_list
);
1675 if (skb_tailroom(rx
->skb
) < entry
->extra_len
) {
1676 I802_DEBUG_INC(rx
->local
->rx_expand_skb_head2
);
1677 if (unlikely(pskb_expand_head(rx
->skb
, 0, entry
->extra_len
,
1679 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
1680 __skb_queue_purge(&entry
->skb_list
);
1681 return RX_DROP_UNUSABLE
;
1684 while ((skb
= __skb_dequeue(&entry
->skb_list
))) {
1685 memcpy(skb_put(rx
->skb
, skb
->len
), skb
->data
, skb
->len
);
1689 /* Complete frame has been reassembled - process it now */
1690 status
= IEEE80211_SKB_RXCB(rx
->skb
);
1691 status
->rx_flags
|= IEEE80211_RX_FRAGMENTED
;
1695 rx
->sta
->rx_packets
++;
1696 if (is_multicast_ether_addr(hdr
->addr1
))
1697 rx
->local
->dot11MulticastReceivedFrameCount
++;
1699 ieee80211_led_rx(rx
->local
);
1703 static int ieee80211_802_1x_port_control(struct ieee80211_rx_data
*rx
)
1705 if (unlikely(!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_AUTHORIZED
)))
1711 static int ieee80211_drop_unencrypted(struct ieee80211_rx_data
*rx
, __le16 fc
)
1713 struct sk_buff
*skb
= rx
->skb
;
1714 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1717 * Pass through unencrypted frames if the hardware has
1718 * decrypted them already.
1720 if (status
->flag
& RX_FLAG_DECRYPTED
)
1723 /* Drop unencrypted frames if key is set. */
1724 if (unlikely(!ieee80211_has_protected(fc
) &&
1725 !ieee80211_is_nullfunc(fc
) &&
1726 ieee80211_is_data(fc
) &&
1727 (rx
->key
|| rx
->sdata
->drop_unencrypted
)))
1733 static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data
*rx
)
1735 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1736 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1737 __le16 fc
= hdr
->frame_control
;
1740 * Pass through unencrypted frames if the hardware has
1741 * decrypted them already.
1743 if (status
->flag
& RX_FLAG_DECRYPTED
)
1746 if (rx
->sta
&& test_sta_flag(rx
->sta
, WLAN_STA_MFP
)) {
1747 if (unlikely(!ieee80211_has_protected(fc
) &&
1748 ieee80211_is_unicast_robust_mgmt_frame(rx
->skb
) &&
1750 if (ieee80211_is_deauth(fc
) ||
1751 ieee80211_is_disassoc(fc
))
1752 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
1757 /* BIP does not use Protected field, so need to check MMIE */
1758 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx
->skb
) &&
1759 ieee80211_get_mmie_keyidx(rx
->skb
) < 0)) {
1760 if (ieee80211_is_deauth(fc
) ||
1761 ieee80211_is_disassoc(fc
))
1762 cfg80211_rx_unprot_mlme_mgmt(rx
->sdata
->dev
,
1768 * When using MFP, Action frames are not allowed prior to
1769 * having configured keys.
1771 if (unlikely(ieee80211_is_action(fc
) && !rx
->key
&&
1772 ieee80211_is_robust_mgmt_frame(
1773 (struct ieee80211_hdr
*) rx
->skb
->data
)))
1781 __ieee80211_data_to_8023(struct ieee80211_rx_data
*rx
, bool *port_control
)
1783 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1784 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1785 bool check_port_control
= false;
1786 struct ethhdr
*ehdr
;
1789 *port_control
= false;
1790 if (ieee80211_has_a4(hdr
->frame_control
) &&
1791 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& !sdata
->u
.vlan
.sta
)
1794 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1795 !!sdata
->u
.mgd
.use_4addr
!= !!ieee80211_has_a4(hdr
->frame_control
)) {
1797 if (!sdata
->u
.mgd
.use_4addr
)
1800 check_port_control
= true;
1803 if (is_multicast_ether_addr(hdr
->addr1
) &&
1804 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& sdata
->u
.vlan
.sta
)
1807 ret
= ieee80211_data_to_8023(rx
->skb
, sdata
->vif
.addr
, sdata
->vif
.type
);
1811 ehdr
= (struct ethhdr
*) rx
->skb
->data
;
1812 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
)
1813 *port_control
= true;
1814 else if (check_port_control
)
1821 * requires that rx->skb is a frame with ethernet header
1823 static bool ieee80211_frame_allowed(struct ieee80211_rx_data
*rx
, __le16 fc
)
1825 static const u8 pae_group_addr
[ETH_ALEN
] __aligned(2)
1826 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
1827 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
1830 * Allow EAPOL frames to us/the PAE group address regardless
1831 * of whether the frame was encrypted or not.
1833 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
&&
1834 (ether_addr_equal(ehdr
->h_dest
, rx
->sdata
->vif
.addr
) ||
1835 ether_addr_equal(ehdr
->h_dest
, pae_group_addr
)))
1838 if (ieee80211_802_1x_port_control(rx
) ||
1839 ieee80211_drop_unencrypted(rx
, fc
))
1846 * requires that rx->skb is a frame with ethernet header
1849 ieee80211_deliver_skb(struct ieee80211_rx_data
*rx
)
1851 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1852 struct net_device
*dev
= sdata
->dev
;
1853 struct sk_buff
*skb
, *xmit_skb
;
1854 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
1855 struct sta_info
*dsta
;
1856 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1861 if ((sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1862 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) &&
1863 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
1864 (status
->rx_flags
& IEEE80211_RX_RA_MATCH
) &&
1865 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
|| !sdata
->u
.vlan
.sta
)) {
1866 if (is_multicast_ether_addr(ehdr
->h_dest
)) {
1868 * send multicast frames both to higher layers in
1869 * local net stack and back to the wireless medium
1871 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
1873 net_info_ratelimited("%s: failed to clone multicast frame\n",
1876 dsta
= sta_info_get(sdata
, skb
->data
);
1879 * The destination station is associated to
1880 * this AP (in this VLAN), so send the frame
1881 * directly to it and do not pass it to local
1891 int align __maybe_unused
;
1893 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1895 * 'align' will only take the values 0 or 2 here
1896 * since all frames are required to be aligned
1897 * to 2-byte boundaries when being passed to
1898 * mac80211; the code here works just as well if
1899 * that isn't true, but mac80211 assumes it can
1900 * access fields as 2-byte aligned (e.g. for
1901 * compare_ether_addr)
1903 align
= ((unsigned long)(skb
->data
+ sizeof(struct ethhdr
))) & 3;
1905 if (WARN_ON(skb_headroom(skb
) < 3)) {
1909 u8
*data
= skb
->data
;
1910 size_t len
= skb_headlen(skb
);
1912 memmove(skb
->data
, data
, len
);
1913 skb_set_tail_pointer(skb
, len
);
1919 /* deliver to local stack */
1920 skb
->protocol
= eth_type_trans(skb
, dev
);
1921 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1922 netif_receive_skb(skb
);
1928 * Send to wireless media and increase priority by 256 to
1929 * keep the received priority instead of reclassifying
1930 * the frame (see cfg80211_classify8021d).
1932 xmit_skb
->priority
+= 256;
1933 xmit_skb
->protocol
= htons(ETH_P_802_3
);
1934 skb_reset_network_header(xmit_skb
);
1935 skb_reset_mac_header(xmit_skb
);
1936 dev_queue_xmit(xmit_skb
);
1940 static ieee80211_rx_result debug_noinline
1941 ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
)
1943 struct net_device
*dev
= rx
->sdata
->dev
;
1944 struct sk_buff
*skb
= rx
->skb
;
1945 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1946 __le16 fc
= hdr
->frame_control
;
1947 struct sk_buff_head frame_list
;
1948 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1950 if (unlikely(!ieee80211_is_data(fc
)))
1953 if (unlikely(!ieee80211_is_data_present(fc
)))
1954 return RX_DROP_MONITOR
;
1956 if (!(status
->rx_flags
& IEEE80211_RX_AMSDU
))
1959 if (ieee80211_has_a4(hdr
->frame_control
) &&
1960 rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1961 !rx
->sdata
->u
.vlan
.sta
)
1962 return RX_DROP_UNUSABLE
;
1964 if (is_multicast_ether_addr(hdr
->addr1
) &&
1965 ((rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1966 rx
->sdata
->u
.vlan
.sta
) ||
1967 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1968 rx
->sdata
->u
.mgd
.use_4addr
)))
1969 return RX_DROP_UNUSABLE
;
1972 __skb_queue_head_init(&frame_list
);
1974 if (skb_linearize(skb
))
1975 return RX_DROP_UNUSABLE
;
1977 ieee80211_amsdu_to_8023s(skb
, &frame_list
, dev
->dev_addr
,
1978 rx
->sdata
->vif
.type
,
1979 rx
->local
->hw
.extra_tx_headroom
, true);
1981 while (!skb_queue_empty(&frame_list
)) {
1982 rx
->skb
= __skb_dequeue(&frame_list
);
1984 if (!ieee80211_frame_allowed(rx
, fc
)) {
1985 dev_kfree_skb(rx
->skb
);
1988 dev
->stats
.rx_packets
++;
1989 dev
->stats
.rx_bytes
+= rx
->skb
->len
;
1991 ieee80211_deliver_skb(rx
);
1997 #ifdef CONFIG_MAC80211_MESH
1998 static ieee80211_rx_result
1999 ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data
*rx
)
2001 struct ieee80211_hdr
*fwd_hdr
, *hdr
;
2002 struct ieee80211_tx_info
*info
;
2003 struct ieee80211s_hdr
*mesh_hdr
;
2004 struct sk_buff
*skb
= rx
->skb
, *fwd_skb
;
2005 struct ieee80211_local
*local
= rx
->local
;
2006 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2007 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2008 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2009 __le16 reason
= cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD
);
2012 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2013 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
2015 /* make sure fixed part of mesh header is there, also checks skb len */
2016 if (!pskb_may_pull(rx
->skb
, hdrlen
+ 6))
2017 return RX_DROP_MONITOR
;
2019 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2021 /* make sure full mesh header is there, also checks skb len */
2022 if (!pskb_may_pull(rx
->skb
,
2023 hdrlen
+ ieee80211_get_mesh_hdrlen(mesh_hdr
)))
2024 return RX_DROP_MONITOR
;
2026 /* reload pointers */
2027 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2028 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2030 /* frame is in RMC, don't forward */
2031 if (ieee80211_is_data(hdr
->frame_control
) &&
2032 is_multicast_ether_addr(hdr
->addr1
) &&
2033 mesh_rmc_check(rx
->sdata
, hdr
->addr3
, mesh_hdr
))
2034 return RX_DROP_MONITOR
;
2036 if (!ieee80211_is_data(hdr
->frame_control
) ||
2037 !(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
2041 return RX_DROP_MONITOR
;
2043 if (mesh_hdr
->flags
& MESH_FLAGS_AE
) {
2044 struct mesh_path
*mppath
;
2048 if (is_multicast_ether_addr(hdr
->addr1
)) {
2049 mpp_addr
= hdr
->addr3
;
2050 proxied_addr
= mesh_hdr
->eaddr1
;
2051 } else if (mesh_hdr
->flags
& MESH_FLAGS_AE_A5_A6
) {
2052 /* has_a4 already checked in ieee80211_rx_mesh_check */
2053 mpp_addr
= hdr
->addr4
;
2054 proxied_addr
= mesh_hdr
->eaddr2
;
2056 return RX_DROP_MONITOR
;
2060 mppath
= mpp_path_lookup(sdata
, proxied_addr
);
2062 mpp_path_add(sdata
, proxied_addr
, mpp_addr
);
2064 spin_lock_bh(&mppath
->state_lock
);
2065 if (!ether_addr_equal(mppath
->mpp
, mpp_addr
))
2066 memcpy(mppath
->mpp
, mpp_addr
, ETH_ALEN
);
2067 spin_unlock_bh(&mppath
->state_lock
);
2072 /* Frame has reached destination. Don't forward */
2073 if (!is_multicast_ether_addr(hdr
->addr1
) &&
2074 ether_addr_equal(sdata
->vif
.addr
, hdr
->addr3
))
2077 q
= ieee80211_select_queue_80211(sdata
, skb
, hdr
);
2078 if (ieee80211_queue_stopped(&local
->hw
, q
)) {
2079 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_congestion
);
2080 return RX_DROP_MONITOR
;
2082 skb_set_queue_mapping(skb
, q
);
2084 if (!--mesh_hdr
->ttl
) {
2085 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_ttl
);
2089 if (!ifmsh
->mshcfg
.dot11MeshForwarding
)
2092 fwd_skb
= skb_copy(skb
, GFP_ATOMIC
);
2094 net_info_ratelimited("%s: failed to clone mesh frame\n",
2099 fwd_hdr
= (struct ieee80211_hdr
*) fwd_skb
->data
;
2100 fwd_hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_RETRY
);
2101 info
= IEEE80211_SKB_CB(fwd_skb
);
2102 memset(info
, 0, sizeof(*info
));
2103 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
2104 info
->control
.vif
= &rx
->sdata
->vif
;
2105 info
->control
.jiffies
= jiffies
;
2106 if (is_multicast_ether_addr(fwd_hdr
->addr1
)) {
2107 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_mcast
);
2108 memcpy(fwd_hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2109 /* update power mode indication when forwarding */
2110 ieee80211_mps_set_frame_flags(sdata
, NULL
, fwd_hdr
);
2111 } else if (!mesh_nexthop_lookup(sdata
, fwd_skb
)) {
2112 /* mesh power mode flags updated in mesh_nexthop_lookup */
2113 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_unicast
);
2115 /* unable to resolve next hop */
2116 mesh_path_error_tx(sdata
, ifmsh
->mshcfg
.element_ttl
,
2117 fwd_hdr
->addr3
, 0, reason
, fwd_hdr
->addr2
);
2118 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_no_route
);
2120 return RX_DROP_MONITOR
;
2123 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_frames
);
2124 ieee80211_add_pending_skb(local
, fwd_skb
);
2126 if (is_multicast_ether_addr(hdr
->addr1
) ||
2127 sdata
->dev
->flags
& IFF_PROMISC
)
2130 return RX_DROP_MONITOR
;
2134 static ieee80211_rx_result debug_noinline
2135 ieee80211_rx_h_data(struct ieee80211_rx_data
*rx
)
2137 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2138 struct ieee80211_local
*local
= rx
->local
;
2139 struct net_device
*dev
= sdata
->dev
;
2140 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2141 __le16 fc
= hdr
->frame_control
;
2145 if (unlikely(!ieee80211_is_data(hdr
->frame_control
)))
2148 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
2149 return RX_DROP_MONITOR
;
2152 * Send unexpected-4addr-frame event to hostapd. For older versions,
2153 * also drop the frame to cooked monitor interfaces.
2155 if (ieee80211_has_a4(hdr
->frame_control
) &&
2156 sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2158 !test_and_set_sta_flag(rx
->sta
, WLAN_STA_4ADDR_EVENT
))
2159 cfg80211_rx_unexpected_4addr_frame(
2160 rx
->sdata
->dev
, rx
->sta
->sta
.addr
, GFP_ATOMIC
);
2161 return RX_DROP_MONITOR
;
2164 err
= __ieee80211_data_to_8023(rx
, &port_control
);
2166 return RX_DROP_UNUSABLE
;
2168 if (!ieee80211_frame_allowed(rx
, fc
))
2169 return RX_DROP_MONITOR
;
2171 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
2172 unlikely(port_control
) && sdata
->bss
) {
2173 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
2181 dev
->stats
.rx_packets
++;
2182 dev
->stats
.rx_bytes
+= rx
->skb
->len
;
2184 if (local
->ps_sdata
&& local
->hw
.conf
.dynamic_ps_timeout
> 0 &&
2185 !is_multicast_ether_addr(
2186 ((struct ethhdr
*)rx
->skb
->data
)->h_dest
) &&
2187 (!local
->scanning
&&
2188 !test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
))) {
2189 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
2190 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
2193 ieee80211_deliver_skb(rx
);
2198 static ieee80211_rx_result debug_noinline
2199 ieee80211_rx_h_ctrl(struct ieee80211_rx_data
*rx
, struct sk_buff_head
*frames
)
2201 struct sk_buff
*skb
= rx
->skb
;
2202 struct ieee80211_bar
*bar
= (struct ieee80211_bar
*)skb
->data
;
2203 struct tid_ampdu_rx
*tid_agg_rx
;
2207 if (likely(!ieee80211_is_ctl(bar
->frame_control
)))
2210 if (ieee80211_is_back_req(bar
->frame_control
)) {
2212 __le16 control
, start_seq_num
;
2213 } __packed bar_data
;
2216 return RX_DROP_MONITOR
;
2218 if (skb_copy_bits(skb
, offsetof(struct ieee80211_bar
, control
),
2219 &bar_data
, sizeof(bar_data
)))
2220 return RX_DROP_MONITOR
;
2222 tid
= le16_to_cpu(bar_data
.control
) >> 12;
2224 tid_agg_rx
= rcu_dereference(rx
->sta
->ampdu_mlme
.tid_rx
[tid
]);
2226 return RX_DROP_MONITOR
;
2228 start_seq_num
= le16_to_cpu(bar_data
.start_seq_num
) >> 4;
2230 /* reset session timer */
2231 if (tid_agg_rx
->timeout
)
2232 mod_timer(&tid_agg_rx
->session_timer
,
2233 TU_TO_EXP_TIME(tid_agg_rx
->timeout
));
2235 spin_lock(&tid_agg_rx
->reorder_lock
);
2236 /* release stored frames up to start of BAR */
2237 ieee80211_release_reorder_frames(rx
->sdata
, tid_agg_rx
,
2238 start_seq_num
, frames
);
2239 spin_unlock(&tid_agg_rx
->reorder_lock
);
2246 * After this point, we only want management frames,
2247 * so we can drop all remaining control frames to
2248 * cooked monitor interfaces.
2250 return RX_DROP_MONITOR
;
2253 static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data
*sdata
,
2254 struct ieee80211_mgmt
*mgmt
,
2257 struct ieee80211_local
*local
= sdata
->local
;
2258 struct sk_buff
*skb
;
2259 struct ieee80211_mgmt
*resp
;
2261 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
)) {
2262 /* Not to own unicast address */
2266 if (!ether_addr_equal(mgmt
->sa
, sdata
->u
.mgd
.bssid
) ||
2267 !ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
)) {
2268 /* Not from the current AP or not associated yet. */
2272 if (len
< 24 + 1 + sizeof(resp
->u
.action
.u
.sa_query
)) {
2273 /* Too short SA Query request frame */
2277 skb
= dev_alloc_skb(sizeof(*resp
) + local
->hw
.extra_tx_headroom
);
2281 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2282 resp
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
2283 memset(resp
, 0, 24);
2284 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
2285 memcpy(resp
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2286 memcpy(resp
->bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2287 resp
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2288 IEEE80211_STYPE_ACTION
);
2289 skb_put(skb
, 1 + sizeof(resp
->u
.action
.u
.sa_query
));
2290 resp
->u
.action
.category
= WLAN_CATEGORY_SA_QUERY
;
2291 resp
->u
.action
.u
.sa_query
.action
= WLAN_ACTION_SA_QUERY_RESPONSE
;
2292 memcpy(resp
->u
.action
.u
.sa_query
.trans_id
,
2293 mgmt
->u
.action
.u
.sa_query
.trans_id
,
2294 WLAN_SA_QUERY_TR_ID_LEN
);
2296 ieee80211_tx_skb(sdata
, skb
);
2299 static ieee80211_rx_result debug_noinline
2300 ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data
*rx
)
2302 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
2303 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2306 * From here on, look only at management frames.
2307 * Data and control frames are already handled,
2308 * and unknown (reserved) frames are useless.
2310 if (rx
->skb
->len
< 24)
2311 return RX_DROP_MONITOR
;
2313 if (!ieee80211_is_mgmt(mgmt
->frame_control
))
2314 return RX_DROP_MONITOR
;
2316 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
2317 ieee80211_is_beacon(mgmt
->frame_control
) &&
2318 !(rx
->flags
& IEEE80211_RX_BEACON_REPORTED
)) {
2321 if (rx
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
2322 sig
= status
->signal
;
2324 cfg80211_report_obss_beacon(rx
->local
->hw
.wiphy
,
2325 rx
->skb
->data
, rx
->skb
->len
,
2327 rx
->flags
|= IEEE80211_RX_BEACON_REPORTED
;
2330 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
2331 return RX_DROP_MONITOR
;
2333 if (ieee80211_drop_unencrypted_mgmt(rx
))
2334 return RX_DROP_UNUSABLE
;
2339 static ieee80211_rx_result debug_noinline
2340 ieee80211_rx_h_action(struct ieee80211_rx_data
*rx
)
2342 struct ieee80211_local
*local
= rx
->local
;
2343 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2344 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
2345 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2346 int len
= rx
->skb
->len
;
2348 if (!ieee80211_is_action(mgmt
->frame_control
))
2351 /* drop too small frames */
2352 if (len
< IEEE80211_MIN_ACTION_SIZE
)
2353 return RX_DROP_UNUSABLE
;
2355 if (!rx
->sta
&& mgmt
->u
.action
.category
!= WLAN_CATEGORY_PUBLIC
&&
2356 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SELF_PROTECTED
)
2357 return RX_DROP_UNUSABLE
;
2359 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
2360 return RX_DROP_UNUSABLE
;
2362 switch (mgmt
->u
.action
.category
) {
2363 case WLAN_CATEGORY_HT
:
2364 /* reject HT action frames from stations not supporting HT */
2365 if (!rx
->sta
->sta
.ht_cap
.ht_supported
)
2368 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2369 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
2370 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
2371 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
2372 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
2375 /* verify action & smps_control/chanwidth are present */
2376 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
2379 switch (mgmt
->u
.action
.u
.ht_smps
.action
) {
2380 case WLAN_HT_ACTION_SMPS
: {
2381 struct ieee80211_supported_band
*sband
;
2382 enum ieee80211_smps_mode smps_mode
;
2384 /* convert to HT capability */
2385 switch (mgmt
->u
.action
.u
.ht_smps
.smps_control
) {
2386 case WLAN_HT_SMPS_CONTROL_DISABLED
:
2387 smps_mode
= IEEE80211_SMPS_OFF
;
2389 case WLAN_HT_SMPS_CONTROL_STATIC
:
2390 smps_mode
= IEEE80211_SMPS_STATIC
;
2392 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
2393 smps_mode
= IEEE80211_SMPS_DYNAMIC
;
2399 /* if no change do nothing */
2400 if (rx
->sta
->sta
.smps_mode
== smps_mode
)
2402 rx
->sta
->sta
.smps_mode
= smps_mode
;
2404 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
2406 rate_control_rate_update(local
, sband
, rx
->sta
,
2407 IEEE80211_RC_SMPS_CHANGED
);
2410 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH
: {
2411 struct ieee80211_supported_band
*sband
;
2412 u8 chanwidth
= mgmt
->u
.action
.u
.ht_notify_cw
.chanwidth
;
2413 enum ieee80211_sta_rx_bandwidth new_bw
;
2415 /* If it doesn't support 40 MHz it can't change ... */
2416 if (!(rx
->sta
->sta
.ht_cap
.cap
&
2417 IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
2420 if (chanwidth
== IEEE80211_HT_CHANWIDTH_20MHZ
)
2421 new_bw
= IEEE80211_STA_RX_BW_20
;
2423 new_bw
= ieee80211_sta_cur_vht_bw(rx
->sta
);
2425 if (rx
->sta
->sta
.bandwidth
== new_bw
)
2428 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
2430 rate_control_rate_update(local
, sband
, rx
->sta
,
2431 IEEE80211_RC_BW_CHANGED
);
2439 case WLAN_CATEGORY_PUBLIC
:
2440 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
2442 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2446 if (!ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
))
2448 if (mgmt
->u
.action
.u
.ext_chan_switch
.action_code
!=
2449 WLAN_PUB_ACTION_EXT_CHANSW_ANN
)
2451 if (len
< offsetof(struct ieee80211_mgmt
,
2452 u
.action
.u
.ext_chan_switch
.variable
))
2455 case WLAN_CATEGORY_VHT
:
2456 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2457 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
2458 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
2459 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
2460 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
2463 /* verify action code is present */
2464 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
2467 switch (mgmt
->u
.action
.u
.vht_opmode_notif
.action_code
) {
2468 case WLAN_VHT_ACTION_OPMODE_NOTIF
: {
2471 /* verify opmode is present */
2472 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
2475 opmode
= mgmt
->u
.action
.u
.vht_opmode_notif
.operating_mode
;
2477 ieee80211_vht_handle_opmode(rx
->sdata
, rx
->sta
,
2478 opmode
, status
->band
,
2486 case WLAN_CATEGORY_BACK
:
2487 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2488 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
2489 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
2490 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
2491 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
2494 /* verify action_code is present */
2495 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
2498 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
2499 case WLAN_ACTION_ADDBA_REQ
:
2500 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2501 sizeof(mgmt
->u
.action
.u
.addba_req
)))
2504 case WLAN_ACTION_ADDBA_RESP
:
2505 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2506 sizeof(mgmt
->u
.action
.u
.addba_resp
)))
2509 case WLAN_ACTION_DELBA
:
2510 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2511 sizeof(mgmt
->u
.action
.u
.delba
)))
2519 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2520 if (status
->band
!= IEEE80211_BAND_5GHZ
)
2523 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2526 /* verify action_code is present */
2527 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
2530 switch (mgmt
->u
.action
.u
.measurement
.action_code
) {
2531 case WLAN_ACTION_SPCT_MSR_REQ
:
2532 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2533 sizeof(mgmt
->u
.action
.u
.measurement
)))
2535 ieee80211_process_measurement_req(sdata
, mgmt
, len
);
2537 case WLAN_ACTION_SPCT_CHL_SWITCH
:
2538 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2541 if (!ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
))
2547 case WLAN_CATEGORY_SA_QUERY
:
2548 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2549 sizeof(mgmt
->u
.action
.u
.sa_query
)))
2552 switch (mgmt
->u
.action
.u
.sa_query
.action
) {
2553 case WLAN_ACTION_SA_QUERY_REQUEST
:
2554 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2556 ieee80211_process_sa_query_req(sdata
, mgmt
, len
);
2560 case WLAN_CATEGORY_SELF_PROTECTED
:
2561 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2562 sizeof(mgmt
->u
.action
.u
.self_prot
.action_code
)))
2565 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
2566 case WLAN_SP_MESH_PEERING_OPEN
:
2567 case WLAN_SP_MESH_PEERING_CLOSE
:
2568 case WLAN_SP_MESH_PEERING_CONFIRM
:
2569 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
2571 if (sdata
->u
.mesh
.user_mpm
)
2572 /* userspace handles this frame */
2575 case WLAN_SP_MGK_INFORM
:
2576 case WLAN_SP_MGK_ACK
:
2577 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
2582 case WLAN_CATEGORY_MESH_ACTION
:
2583 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2584 sizeof(mgmt
->u
.action
.u
.mesh_action
.action_code
)))
2587 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
2589 if (mesh_action_is_path_sel(mgmt
) &&
2590 !mesh_path_sel_is_hwmp(sdata
))
2598 status
->rx_flags
|= IEEE80211_RX_MALFORMED_ACTION_FRM
;
2599 /* will return in the next handlers */
2604 rx
->sta
->rx_packets
++;
2605 dev_kfree_skb(rx
->skb
);
2609 rx
->skb
->pkt_type
= IEEE80211_SDATA_QUEUE_TYPE_FRAME
;
2610 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
2611 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2613 rx
->sta
->rx_packets
++;
2617 static ieee80211_rx_result debug_noinline
2618 ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data
*rx
)
2620 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2623 /* skip known-bad action frames and return them in the next handler */
2624 if (status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
)
2628 * Getting here means the kernel doesn't know how to handle
2629 * it, but maybe userspace does ... include returned frames
2630 * so userspace can register for those to know whether ones
2631 * it transmitted were processed or returned.
2634 if (rx
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
2635 sig
= status
->signal
;
2637 if (cfg80211_rx_mgmt(&rx
->sdata
->wdev
, status
->freq
, sig
,
2638 rx
->skb
->data
, rx
->skb
->len
,
2641 rx
->sta
->rx_packets
++;
2642 dev_kfree_skb(rx
->skb
);
2649 static ieee80211_rx_result debug_noinline
2650 ieee80211_rx_h_action_return(struct ieee80211_rx_data
*rx
)
2652 struct ieee80211_local
*local
= rx
->local
;
2653 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
2654 struct sk_buff
*nskb
;
2655 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2656 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2658 if (!ieee80211_is_action(mgmt
->frame_control
))
2662 * For AP mode, hostapd is responsible for handling any action
2663 * frames that we didn't handle, including returning unknown
2664 * ones. For all other modes we will return them to the sender,
2665 * setting the 0x80 bit in the action category, as required by
2666 * 802.11-2012 9.24.4.
2667 * Newer versions of hostapd shall also use the management frame
2668 * registration mechanisms, but older ones still use cooked
2669 * monitor interfaces so push all frames there.
2671 if (!(status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
) &&
2672 (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
2673 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
2674 return RX_DROP_MONITOR
;
2676 if (is_multicast_ether_addr(mgmt
->da
))
2677 return RX_DROP_MONITOR
;
2679 /* do not return rejected action frames */
2680 if (mgmt
->u
.action
.category
& 0x80)
2681 return RX_DROP_UNUSABLE
;
2683 nskb
= skb_copy_expand(rx
->skb
, local
->hw
.extra_tx_headroom
, 0,
2686 struct ieee80211_mgmt
*nmgmt
= (void *)nskb
->data
;
2688 nmgmt
->u
.action
.category
|= 0x80;
2689 memcpy(nmgmt
->da
, nmgmt
->sa
, ETH_ALEN
);
2690 memcpy(nmgmt
->sa
, rx
->sdata
->vif
.addr
, ETH_ALEN
);
2692 memset(nskb
->cb
, 0, sizeof(nskb
->cb
));
2694 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
2695 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(nskb
);
2697 info
->flags
= IEEE80211_TX_CTL_TX_OFFCHAN
|
2698 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
|
2699 IEEE80211_TX_CTL_NO_CCK_RATE
;
2700 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
2702 local
->hw
.offchannel_tx_hw_queue
;
2705 __ieee80211_tx_skb_tid_band(rx
->sdata
, nskb
, 7,
2708 dev_kfree_skb(rx
->skb
);
2712 static ieee80211_rx_result debug_noinline
2713 ieee80211_rx_h_mgmt(struct ieee80211_rx_data
*rx
)
2715 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2716 struct ieee80211_mgmt
*mgmt
= (void *)rx
->skb
->data
;
2719 stype
= mgmt
->frame_control
& cpu_to_le16(IEEE80211_FCTL_STYPE
);
2721 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2722 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2723 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2724 return RX_DROP_MONITOR
;
2727 case cpu_to_le16(IEEE80211_STYPE_AUTH
):
2728 case cpu_to_le16(IEEE80211_STYPE_BEACON
):
2729 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP
):
2730 /* process for all: mesh, mlme, ibss */
2732 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP
):
2733 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP
):
2734 case cpu_to_le16(IEEE80211_STYPE_DEAUTH
):
2735 case cpu_to_le16(IEEE80211_STYPE_DISASSOC
):
2736 if (is_multicast_ether_addr(mgmt
->da
) &&
2737 !is_broadcast_ether_addr(mgmt
->da
))
2738 return RX_DROP_MONITOR
;
2740 /* process only for station */
2741 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2742 return RX_DROP_MONITOR
;
2744 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
):
2745 /* process only for ibss and mesh */
2746 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2747 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
2748 return RX_DROP_MONITOR
;
2751 return RX_DROP_MONITOR
;
2754 /* queue up frame and kick off work to process it */
2755 rx
->skb
->pkt_type
= IEEE80211_SDATA_QUEUE_TYPE_FRAME
;
2756 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
2757 ieee80211_queue_work(&rx
->local
->hw
, &sdata
->work
);
2759 rx
->sta
->rx_packets
++;
2764 /* TODO: use IEEE80211_RX_FRAGMENTED */
2765 static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data
*rx
,
2766 struct ieee80211_rate
*rate
)
2768 struct ieee80211_sub_if_data
*sdata
;
2769 struct ieee80211_local
*local
= rx
->local
;
2770 struct sk_buff
*skb
= rx
->skb
, *skb2
;
2771 struct net_device
*prev_dev
= NULL
;
2772 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2773 int needed_headroom
;
2776 * If cooked monitor has been processed already, then
2777 * don't do it again. If not, set the flag.
2779 if (rx
->flags
& IEEE80211_RX_CMNTR
)
2781 rx
->flags
|= IEEE80211_RX_CMNTR
;
2783 /* If there are no cooked monitor interfaces, just free the SKB */
2784 if (!local
->cooked_mntrs
)
2787 /* room for the radiotap header based on driver features */
2788 needed_headroom
= ieee80211_rx_radiotap_space(local
, status
);
2790 if (skb_headroom(skb
) < needed_headroom
&&
2791 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
))
2794 /* prepend radiotap information */
2795 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, needed_headroom
,
2798 skb_set_mac_header(skb
, 0);
2799 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
2800 skb
->pkt_type
= PACKET_OTHERHOST
;
2801 skb
->protocol
= htons(ETH_P_802_2
);
2803 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
2804 if (!ieee80211_sdata_running(sdata
))
2807 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
||
2808 !(sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
))
2812 skb2
= skb_clone(skb
, GFP_ATOMIC
);
2814 skb2
->dev
= prev_dev
;
2815 netif_receive_skb(skb2
);
2819 prev_dev
= sdata
->dev
;
2820 sdata
->dev
->stats
.rx_packets
++;
2821 sdata
->dev
->stats
.rx_bytes
+= skb
->len
;
2825 skb
->dev
= prev_dev
;
2826 netif_receive_skb(skb
);
2834 static void ieee80211_rx_handlers_result(struct ieee80211_rx_data
*rx
,
2835 ieee80211_rx_result res
)
2838 case RX_DROP_MONITOR
:
2839 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
2841 rx
->sta
->rx_dropped
++;
2844 struct ieee80211_rate
*rate
= NULL
;
2845 struct ieee80211_supported_band
*sband
;
2846 struct ieee80211_rx_status
*status
;
2848 status
= IEEE80211_SKB_RXCB((rx
->skb
));
2850 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
2851 if (!(status
->flag
& RX_FLAG_HT
) &&
2852 !(status
->flag
& RX_FLAG_VHT
))
2853 rate
= &sband
->bitrates
[status
->rate_idx
];
2855 ieee80211_rx_cooked_monitor(rx
, rate
);
2858 case RX_DROP_UNUSABLE
:
2859 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
2861 rx
->sta
->rx_dropped
++;
2862 dev_kfree_skb(rx
->skb
);
2865 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_queued
);
2870 static void ieee80211_rx_handlers(struct ieee80211_rx_data
*rx
,
2871 struct sk_buff_head
*frames
)
2873 ieee80211_rx_result res
= RX_DROP_MONITOR
;
2874 struct sk_buff
*skb
;
2876 #define CALL_RXH(rxh) \
2879 if (res != RX_CONTINUE) \
2883 spin_lock_bh(&rx
->local
->rx_path_lock
);
2885 while ((skb
= __skb_dequeue(frames
))) {
2887 * all the other fields are valid across frames
2888 * that belong to an aMPDU since they are on the
2889 * same TID from the same station
2893 CALL_RXH(ieee80211_rx_h_decrypt
)
2894 CALL_RXH(ieee80211_rx_h_check_more_data
)
2895 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll
)
2896 CALL_RXH(ieee80211_rx_h_sta_process
)
2897 CALL_RXH(ieee80211_rx_h_defragment
)
2898 CALL_RXH(ieee80211_rx_h_michael_mic_verify
)
2899 /* must be after MMIC verify so header is counted in MPDU mic */
2900 #ifdef CONFIG_MAC80211_MESH
2901 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
2902 CALL_RXH(ieee80211_rx_h_mesh_fwding
);
2904 CALL_RXH(ieee80211_rx_h_amsdu
)
2905 CALL_RXH(ieee80211_rx_h_data
)
2907 /* special treatment -- needs the queue */
2908 res
= ieee80211_rx_h_ctrl(rx
, frames
);
2909 if (res
!= RX_CONTINUE
)
2912 CALL_RXH(ieee80211_rx_h_mgmt_check
)
2913 CALL_RXH(ieee80211_rx_h_action
)
2914 CALL_RXH(ieee80211_rx_h_userspace_mgmt
)
2915 CALL_RXH(ieee80211_rx_h_action_return
)
2916 CALL_RXH(ieee80211_rx_h_mgmt
)
2919 ieee80211_rx_handlers_result(rx
, res
);
2924 spin_unlock_bh(&rx
->local
->rx_path_lock
);
2927 static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data
*rx
)
2929 struct sk_buff_head reorder_release
;
2930 ieee80211_rx_result res
= RX_DROP_MONITOR
;
2932 __skb_queue_head_init(&reorder_release
);
2934 #define CALL_RXH(rxh) \
2937 if (res != RX_CONTINUE) \
2941 CALL_RXH(ieee80211_rx_h_check
)
2943 ieee80211_rx_reorder_ampdu(rx
, &reorder_release
);
2945 ieee80211_rx_handlers(rx
, &reorder_release
);
2949 ieee80211_rx_handlers_result(rx
, res
);
2955 * This function makes calls into the RX path, therefore
2956 * it has to be invoked under RCU read lock.
2958 void ieee80211_release_reorder_timeout(struct sta_info
*sta
, int tid
)
2960 struct sk_buff_head frames
;
2961 struct ieee80211_rx_data rx
= {
2963 .sdata
= sta
->sdata
,
2964 .local
= sta
->local
,
2965 /* This is OK -- must be QoS data frame */
2966 .security_idx
= tid
,
2970 struct tid_ampdu_rx
*tid_agg_rx
;
2972 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
2976 __skb_queue_head_init(&frames
);
2978 spin_lock(&tid_agg_rx
->reorder_lock
);
2979 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
2980 spin_unlock(&tid_agg_rx
->reorder_lock
);
2982 ieee80211_rx_handlers(&rx
, &frames
);
2985 /* main receive path */
2987 static int prepare_for_handlers(struct ieee80211_rx_data
*rx
,
2988 struct ieee80211_hdr
*hdr
)
2990 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2991 struct sk_buff
*skb
= rx
->skb
;
2992 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2993 u8
*bssid
= ieee80211_get_bssid(hdr
, skb
->len
, sdata
->vif
.type
);
2994 int multicast
= is_multicast_ether_addr(hdr
->addr1
);
2996 switch (sdata
->vif
.type
) {
2997 case NL80211_IFTYPE_STATION
:
2998 if (!bssid
&& !sdata
->u
.mgd
.use_4addr
)
3001 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
)) {
3002 if (!(sdata
->dev
->flags
& IFF_PROMISC
) ||
3003 sdata
->u
.mgd
.use_4addr
)
3005 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
3008 case NL80211_IFTYPE_ADHOC
:
3011 if (ieee80211_is_beacon(hdr
->frame_control
)) {
3013 } else if (!ieee80211_bssid_match(bssid
, sdata
->u
.ibss
.bssid
)) {
3015 } else if (!multicast
&&
3016 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
)) {
3017 if (!(sdata
->dev
->flags
& IFF_PROMISC
))
3019 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
3020 } else if (!rx
->sta
) {
3022 if (status
->flag
& (RX_FLAG_HT
| RX_FLAG_VHT
))
3023 rate_idx
= 0; /* TODO: HT/VHT rates */
3025 rate_idx
= status
->rate_idx
;
3026 ieee80211_ibss_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
3030 case NL80211_IFTYPE_MESH_POINT
:
3032 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
)) {
3033 if (!(sdata
->dev
->flags
& IFF_PROMISC
))
3036 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
3039 case NL80211_IFTYPE_AP_VLAN
:
3040 case NL80211_IFTYPE_AP
:
3042 if (!ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
3044 } else if (!ieee80211_bssid_match(bssid
, sdata
->vif
.addr
)) {
3046 * Accept public action frames even when the
3047 * BSSID doesn't match, this is used for P2P
3048 * and location updates. Note that mac80211
3049 * itself never looks at these frames.
3052 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
3054 if (ieee80211_is_public_action(hdr
, skb
->len
))
3056 if (!ieee80211_is_beacon(hdr
->frame_control
))
3058 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
3061 case NL80211_IFTYPE_WDS
:
3062 if (bssid
|| !ieee80211_is_data(hdr
->frame_control
))
3064 if (!ether_addr_equal(sdata
->u
.wds
.remote_addr
, hdr
->addr2
))
3067 case NL80211_IFTYPE_P2P_DEVICE
:
3068 if (!ieee80211_is_public_action(hdr
, skb
->len
) &&
3069 !ieee80211_is_probe_req(hdr
->frame_control
) &&
3070 !ieee80211_is_probe_resp(hdr
->frame_control
) &&
3071 !ieee80211_is_beacon(hdr
->frame_control
))
3073 if (!ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
) &&
3075 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
3078 /* should never get here */
3087 * This function returns whether or not the SKB
3088 * was destined for RX processing or not, which,
3089 * if consume is true, is equivalent to whether
3090 * or not the skb was consumed.
3092 static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data
*rx
,
3093 struct sk_buff
*skb
, bool consume
)
3095 struct ieee80211_local
*local
= rx
->local
;
3096 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3097 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3098 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
3102 status
->rx_flags
|= IEEE80211_RX_RA_MATCH
;
3103 prepares
= prepare_for_handlers(rx
, hdr
);
3109 skb
= skb_copy(skb
, GFP_ATOMIC
);
3111 if (net_ratelimit())
3112 wiphy_debug(local
->hw
.wiphy
,
3113 "failed to copy skb for %s\n",
3121 ieee80211_invoke_rx_handlers(rx
);
3126 * This is the actual Rx frames handler. as it blongs to Rx path it must
3127 * be called with rcu_read_lock protection.
3129 static void __ieee80211_rx_handle_packet(struct ieee80211_hw
*hw
,
3130 struct sk_buff
*skb
)
3132 struct ieee80211_local
*local
= hw_to_local(hw
);
3133 struct ieee80211_sub_if_data
*sdata
;
3134 struct ieee80211_hdr
*hdr
;
3136 struct ieee80211_rx_data rx
;
3137 struct ieee80211_sub_if_data
*prev
;
3138 struct sta_info
*sta
, *tmp
, *prev_sta
;
3141 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
3142 memset(&rx
, 0, sizeof(rx
));
3146 if (ieee80211_is_data(fc
) || ieee80211_is_mgmt(fc
))
3147 local
->dot11ReceivedFragmentCount
++;
3149 if (ieee80211_is_mgmt(fc
)) {
3150 /* drop frame if too short for header */
3151 if (skb
->len
< ieee80211_hdrlen(fc
))
3154 err
= skb_linearize(skb
);
3156 err
= !pskb_may_pull(skb
, ieee80211_hdrlen(fc
));
3164 hdr
= (struct ieee80211_hdr
*)skb
->data
;
3165 ieee80211_parse_qos(&rx
);
3166 ieee80211_verify_alignment(&rx
);
3168 if (unlikely(ieee80211_is_probe_resp(hdr
->frame_control
) ||
3169 ieee80211_is_beacon(hdr
->frame_control
)))
3170 ieee80211_scan_rx(local
, skb
);
3172 if (ieee80211_is_data(fc
)) {
3175 for_each_sta_info(local
, hdr
->addr2
, sta
, tmp
) {
3182 rx
.sdata
= prev_sta
->sdata
;
3183 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
3190 rx
.sdata
= prev_sta
->sdata
;
3192 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
3200 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3201 if (!ieee80211_sdata_running(sdata
))
3204 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
3205 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
3209 * frame is destined for this interface, but if it's
3210 * not also for the previous one we handle that after
3211 * the loop to avoid copying the SKB once too much
3219 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
3221 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
3227 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
3230 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
3239 * This is the receive path handler. It is called by a low level driver when an
3240 * 802.11 MPDU is received from the hardware.
3242 void ieee80211_rx(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
3244 struct ieee80211_local
*local
= hw_to_local(hw
);
3245 struct ieee80211_rate
*rate
= NULL
;
3246 struct ieee80211_supported_band
*sband
;
3247 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3249 WARN_ON_ONCE(softirq_count() == 0);
3251 if (WARN_ON(status
->band
>= IEEE80211_NUM_BANDS
))
3254 sband
= local
->hw
.wiphy
->bands
[status
->band
];
3255 if (WARN_ON(!sband
))
3259 * If we're suspending, it is possible although not too likely
3260 * that we'd be receiving frames after having already partially
3261 * quiesced the stack. We can't process such frames then since
3262 * that might, for example, cause stations to be added or other
3263 * driver callbacks be invoked.
3265 if (unlikely(local
->quiescing
|| local
->suspended
))
3268 /* We might be during a HW reconfig, prevent Rx for the same reason */
3269 if (unlikely(local
->in_reconfig
))
3273 * The same happens when we're not even started,
3274 * but that's worth a warning.
3276 if (WARN_ON(!local
->started
))
3279 if (likely(!(status
->flag
& RX_FLAG_FAILED_PLCP_CRC
))) {
3281 * Validate the rate, unless a PLCP error means that
3282 * we probably can't have a valid rate here anyway.
3285 if (status
->flag
& RX_FLAG_HT
) {
3287 * rate_idx is MCS index, which can be [0-76]
3290 * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
3292 * Anything else would be some sort of driver or
3293 * hardware error. The driver should catch hardware
3296 if (WARN(status
->rate_idx
> 76,
3297 "Rate marked as an HT rate but passed "
3298 "status->rate_idx is not "
3299 "an MCS index [0-76]: %d (0x%02x)\n",
3303 } else if (status
->flag
& RX_FLAG_VHT
) {
3304 if (WARN_ONCE(status
->rate_idx
> 9 ||
3306 status
->vht_nss
> 8,
3307 "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
3308 status
->rate_idx
, status
->vht_nss
))
3311 if (WARN_ON(status
->rate_idx
>= sband
->n_bitrates
))
3313 rate
= &sband
->bitrates
[status
->rate_idx
];
3317 status
->rx_flags
= 0;
3320 * key references and virtual interfaces are protected using RCU
3321 * and this requires that we are in a read-side RCU section during
3322 * receive processing
3327 * Frames with failed FCS/PLCP checksum are not returned,
3328 * all other frames are returned without radiotap header
3329 * if it was previously present.
3330 * Also, frames with less than 16 bytes are dropped.
3332 skb
= ieee80211_rx_monitor(local
, skb
, rate
);
3338 ieee80211_tpt_led_trig_rx(local
,
3339 ((struct ieee80211_hdr
*)skb
->data
)->frame_control
,
3341 __ieee80211_rx_handle_packet(hw
, skb
);
3349 EXPORT_SYMBOL(ieee80211_rx
);
3351 /* This is a version of the rx handler that can be called from hard irq
3352 * context. Post the skb on the queue and schedule the tasklet */
3353 void ieee80211_rx_irqsafe(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
3355 struct ieee80211_local
*local
= hw_to_local(hw
);
3357 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status
) > sizeof(skb
->cb
));
3359 skb
->pkt_type
= IEEE80211_RX_MSG
;
3360 skb_queue_tail(&local
->skb_queue
, skb
);
3361 tasklet_schedule(&local
->tasklet
);
3363 EXPORT_SYMBOL(ieee80211_rx_irqsafe
);