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
) {
261 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS
);
262 *pos
++ = local
->hw
.radiotap_mcs_details
;
264 if (status
->flag
& RX_FLAG_SHORT_GI
)
265 *pos
|= IEEE80211_RADIOTAP_MCS_SGI
;
266 if (status
->flag
& RX_FLAG_40MHZ
)
267 *pos
|= IEEE80211_RADIOTAP_MCS_BW_40
;
268 if (status
->flag
& RX_FLAG_HT_GF
)
269 *pos
|= IEEE80211_RADIOTAP_MCS_FMT_GF
;
271 *pos
++ = status
->rate_idx
;
274 if (status
->flag
& RX_FLAG_AMPDU_DETAILS
) {
277 /* ensure 4 byte alignment */
278 while ((pos
- (u8
*)rthdr
) & 3)
281 cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS
);
282 put_unaligned_le32(status
->ampdu_reference
, pos
);
284 if (status
->flag
& RX_FLAG_AMPDU_REPORT_ZEROLEN
)
285 flags
|= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN
;
286 if (status
->flag
& RX_FLAG_AMPDU_IS_ZEROLEN
)
287 flags
|= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN
;
288 if (status
->flag
& RX_FLAG_AMPDU_LAST_KNOWN
)
289 flags
|= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN
;
290 if (status
->flag
& RX_FLAG_AMPDU_IS_LAST
)
291 flags
|= IEEE80211_RADIOTAP_AMPDU_IS_LAST
;
292 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_ERROR
)
293 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR
;
294 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
295 flags
|= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN
;
296 put_unaligned_le16(flags
, pos
);
298 if (status
->flag
& RX_FLAG_AMPDU_DELIM_CRC_KNOWN
)
299 *pos
++ = status
->ampdu_delimiter_crc
;
305 if (status
->flag
& RX_FLAG_VHT
) {
306 u16 known
= local
->hw
.radiotap_vht_details
;
308 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT
);
309 /* known field - how to handle 80+80? */
310 if (status
->flag
& RX_FLAG_80P80MHZ
)
311 known
&= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
;
312 put_unaligned_le16(known
, pos
);
315 if (status
->flag
& RX_FLAG_SHORT_GI
)
316 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_SGI
;
319 if (status
->flag
& RX_FLAG_80MHZ
)
321 else if (status
->flag
& RX_FLAG_80P80MHZ
)
322 *pos
++ = 0; /* marked not known above */
323 else if (status
->flag
& RX_FLAG_160MHZ
)
325 else if (status
->flag
& RX_FLAG_40MHZ
)
330 *pos
= (status
->rate_idx
<< 4) | status
->vht_nss
;
340 if (status
->vendor_radiotap_len
) {
341 /* ensure 2 byte alignment for the vendor field as required */
342 if ((pos
- (u8
*)rthdr
) & 1)
344 *pos
++ = status
->vendor_radiotap_oui
[0];
345 *pos
++ = status
->vendor_radiotap_oui
[1];
346 *pos
++ = status
->vendor_radiotap_oui
[2];
347 *pos
++ = status
->vendor_radiotap_subns
;
348 put_unaligned_le16(status
->vendor_radiotap_len
, pos
);
350 /* align the actual payload as requested */
351 while ((pos
- (u8
*)rthdr
) & (status
->vendor_radiotap_align
- 1))
357 * This function copies a received frame to all monitor interfaces and
358 * returns a cleaned-up SKB that no longer includes the FCS nor the
359 * radiotap header the driver might have added.
361 static struct sk_buff
*
362 ieee80211_rx_monitor(struct ieee80211_local
*local
, struct sk_buff
*origskb
,
363 struct ieee80211_rate
*rate
)
365 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(origskb
);
366 struct ieee80211_sub_if_data
*sdata
;
368 struct sk_buff
*skb
, *skb2
;
369 struct net_device
*prev_dev
= NULL
;
370 int present_fcs_len
= 0;
373 * First, we may need to make a copy of the skb because
374 * (1) we need to modify it for radiotap (if not present), and
375 * (2) the other RX handlers will modify the skb we got.
377 * We don't need to, of course, if we aren't going to return
378 * the SKB because it has a bad FCS/PLCP checksum.
381 if (local
->hw
.flags
& IEEE80211_HW_RX_INCLUDES_FCS
)
382 present_fcs_len
= FCS_LEN
;
384 /* ensure hdr->frame_control and vendor radiotap data are in skb head */
385 if (!pskb_may_pull(origskb
, 2 + status
->vendor_radiotap_len
)) {
386 dev_kfree_skb(origskb
);
390 if (!local
->monitors
) {
391 if (should_drop_frame(origskb
, present_fcs_len
)) {
392 dev_kfree_skb(origskb
);
396 return remove_monitor_info(local
, origskb
);
399 /* room for the radiotap header based on driver features */
400 needed_headroom
= ieee80211_rx_radiotap_space(local
, status
);
402 if (should_drop_frame(origskb
, present_fcs_len
)) {
403 /* only need to expand headroom if necessary */
408 * This shouldn't trigger often because most devices have an
409 * RX header they pull before we get here, and that should
410 * be big enough for our radiotap information. We should
411 * probably export the length to drivers so that we can have
412 * them allocate enough headroom to start with.
414 if (skb_headroom(skb
) < needed_headroom
&&
415 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
)) {
421 * Need to make a copy and possibly remove radiotap header
422 * and FCS from the original.
424 skb
= skb_copy_expand(origskb
, needed_headroom
, 0, GFP_ATOMIC
);
426 origskb
= remove_monitor_info(local
, origskb
);
432 /* prepend radiotap information */
433 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, needed_headroom
,
436 skb_reset_mac_header(skb
);
437 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
438 skb
->pkt_type
= PACKET_OTHERHOST
;
439 skb
->protocol
= htons(ETH_P_802_2
);
441 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
442 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
)
445 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
)
448 if (!ieee80211_sdata_running(sdata
))
452 skb2
= skb_clone(skb
, GFP_ATOMIC
);
454 skb2
->dev
= prev_dev
;
455 netif_receive_skb(skb2
);
459 prev_dev
= sdata
->dev
;
460 sdata
->dev
->stats
.rx_packets
++;
461 sdata
->dev
->stats
.rx_bytes
+= skb
->len
;
466 netif_receive_skb(skb
);
473 static void ieee80211_parse_qos(struct ieee80211_rx_data
*rx
)
475 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
476 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
477 int tid
, seqno_idx
, security_idx
;
479 /* does the frame have a qos control field? */
480 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
481 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
482 /* frame has qos control */
483 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
484 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
485 status
->rx_flags
|= IEEE80211_RX_AMSDU
;
491 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
493 * Sequence numbers for management frames, QoS data
494 * frames with a broadcast/multicast address in the
495 * Address 1 field, and all non-QoS data frames sent
496 * by QoS STAs are assigned using an additional single
497 * modulo-4096 counter, [...]
499 * We also use that counter for non-QoS STAs.
501 seqno_idx
= IEEE80211_NUM_TIDS
;
503 if (ieee80211_is_mgmt(hdr
->frame_control
))
504 security_idx
= IEEE80211_NUM_TIDS
;
508 rx
->seqno_idx
= seqno_idx
;
509 rx
->security_idx
= security_idx
;
510 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
511 * For now, set skb->priority to 0 for other cases. */
512 rx
->skb
->priority
= (tid
> 7) ? 0 : tid
;
516 * DOC: Packet alignment
518 * Drivers always need to pass packets that are aligned to two-byte boundaries
521 * Additionally, should, if possible, align the payload data in a way that
522 * guarantees that the contained IP header is aligned to a four-byte
523 * boundary. In the case of regular frames, this simply means aligning the
524 * payload to a four-byte boundary (because either the IP header is directly
525 * contained, or IV/RFC1042 headers that have a length divisible by four are
526 * in front of it). If the payload data is not properly aligned and the
527 * architecture doesn't support efficient unaligned operations, mac80211
528 * will align the data.
530 * With A-MSDU frames, however, the payload data address must yield two modulo
531 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
532 * push the IP header further back to a multiple of four again. Thankfully, the
533 * specs were sane enough this time around to require padding each A-MSDU
534 * subframe to a length that is a multiple of four.
536 * Padding like Atheros hardware adds which is between the 802.11 header and
537 * the payload is not supported, the driver is required to move the 802.11
538 * header to be directly in front of the payload in that case.
540 static void ieee80211_verify_alignment(struct ieee80211_rx_data
*rx
)
542 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
543 WARN_ONCE((unsigned long)rx
->skb
->data
& 1,
544 "unaligned packet at 0x%p\n", rx
->skb
->data
);
551 static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff
*skb
)
553 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
555 if (skb
->len
< 24 || is_multicast_ether_addr(hdr
->addr1
))
558 return ieee80211_is_robust_mgmt_frame(hdr
);
562 static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff
*skb
)
564 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
566 if (skb
->len
< 24 || !is_multicast_ether_addr(hdr
->addr1
))
569 return ieee80211_is_robust_mgmt_frame(hdr
);
573 /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
574 static int ieee80211_get_mmie_keyidx(struct sk_buff
*skb
)
576 struct ieee80211_mgmt
*hdr
= (struct ieee80211_mgmt
*) skb
->data
;
577 struct ieee80211_mmie
*mmie
;
579 if (skb
->len
< 24 + sizeof(*mmie
) || !is_multicast_ether_addr(hdr
->da
))
582 if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr
*) hdr
))
583 return -1; /* not a robust management frame */
585 mmie
= (struct ieee80211_mmie
*)
586 (skb
->data
+ skb
->len
- sizeof(*mmie
));
587 if (mmie
->element_id
!= WLAN_EID_MMIE
||
588 mmie
->length
!= sizeof(*mmie
) - 2)
591 return le16_to_cpu(mmie
->key_id
);
594 static ieee80211_rx_result
ieee80211_rx_mesh_check(struct ieee80211_rx_data
*rx
)
596 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
597 char *dev_addr
= rx
->sdata
->vif
.addr
;
599 if (ieee80211_is_data(hdr
->frame_control
)) {
600 if (is_multicast_ether_addr(hdr
->addr1
)) {
601 if (ieee80211_has_tods(hdr
->frame_control
) ||
602 !ieee80211_has_fromds(hdr
->frame_control
))
603 return RX_DROP_MONITOR
;
604 if (ether_addr_equal(hdr
->addr3
, dev_addr
))
605 return RX_DROP_MONITOR
;
607 if (!ieee80211_has_a4(hdr
->frame_control
))
608 return RX_DROP_MONITOR
;
609 if (ether_addr_equal(hdr
->addr4
, dev_addr
))
610 return RX_DROP_MONITOR
;
614 /* If there is not an established peer link and this is not a peer link
615 * establisment frame, beacon or probe, drop the frame.
618 if (!rx
->sta
|| sta_plink_state(rx
->sta
) != NL80211_PLINK_ESTAB
) {
619 struct ieee80211_mgmt
*mgmt
;
621 if (!ieee80211_is_mgmt(hdr
->frame_control
))
622 return RX_DROP_MONITOR
;
624 if (ieee80211_is_action(hdr
->frame_control
)) {
627 /* make sure category field is present */
628 if (rx
->skb
->len
< IEEE80211_MIN_ACTION_SIZE
)
629 return RX_DROP_MONITOR
;
631 mgmt
= (struct ieee80211_mgmt
*)hdr
;
632 category
= mgmt
->u
.action
.category
;
633 if (category
!= WLAN_CATEGORY_MESH_ACTION
&&
634 category
!= WLAN_CATEGORY_SELF_PROTECTED
)
635 return RX_DROP_MONITOR
;
639 if (ieee80211_is_probe_req(hdr
->frame_control
) ||
640 ieee80211_is_probe_resp(hdr
->frame_control
) ||
641 ieee80211_is_beacon(hdr
->frame_control
) ||
642 ieee80211_is_auth(hdr
->frame_control
))
645 return RX_DROP_MONITOR
;
651 static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data
*sdata
,
652 struct tid_ampdu_rx
*tid_agg_rx
,
654 struct sk_buff_head
*frames
)
656 struct sk_buff
*skb
= tid_agg_rx
->reorder_buf
[index
];
657 struct ieee80211_rx_status
*status
;
659 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
664 /* release the frame from the reorder ring buffer */
665 tid_agg_rx
->stored_mpdu_num
--;
666 tid_agg_rx
->reorder_buf
[index
] = NULL
;
667 status
= IEEE80211_SKB_RXCB(skb
);
668 status
->rx_flags
|= IEEE80211_RX_DEFERRED_RELEASE
;
669 __skb_queue_tail(frames
, skb
);
672 tid_agg_rx
->head_seq_num
= ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
675 static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data
*sdata
,
676 struct tid_ampdu_rx
*tid_agg_rx
,
678 struct sk_buff_head
*frames
)
682 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
684 while (ieee80211_sn_less(tid_agg_rx
->head_seq_num
, head_seq_num
)) {
685 index
= ieee80211_sn_sub(tid_agg_rx
->head_seq_num
,
687 tid_agg_rx
->buf_size
;
688 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
694 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
695 * the skb was added to the buffer longer than this time ago, the earlier
696 * frames that have not yet been received are assumed to be lost and the skb
697 * can be released for processing. This may also release other skb's from the
698 * reorder buffer if there are no additional gaps between the frames.
700 * Callers must hold tid_agg_rx->reorder_lock.
702 #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
704 static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data
*sdata
,
705 struct tid_ampdu_rx
*tid_agg_rx
,
706 struct sk_buff_head
*frames
)
710 lockdep_assert_held(&tid_agg_rx
->reorder_lock
);
712 /* release the buffer until next missing frame */
713 index
= ieee80211_sn_sub(tid_agg_rx
->head_seq_num
,
714 tid_agg_rx
->ssn
) % tid_agg_rx
->buf_size
;
715 if (!tid_agg_rx
->reorder_buf
[index
] &&
716 tid_agg_rx
->stored_mpdu_num
) {
718 * No buffers ready to be released, but check whether any
719 * frames in the reorder buffer have timed out.
722 for (j
= (index
+ 1) % tid_agg_rx
->buf_size
; j
!= index
;
723 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
724 if (!tid_agg_rx
->reorder_buf
[j
]) {
729 !time_after(jiffies
, tid_agg_rx
->reorder_time
[j
] +
730 HT_RX_REORDER_BUF_TIMEOUT
))
731 goto set_release_timer
;
733 ht_dbg_ratelimited(sdata
,
734 "release an RX reorder frame due to timeout on earlier frames\n");
735 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, j
,
739 * Increment the head seq# also for the skipped slots.
741 tid_agg_rx
->head_seq_num
=
742 (tid_agg_rx
->head_seq_num
+
743 skipped
) & IEEE80211_SN_MASK
;
746 } else while (tid_agg_rx
->reorder_buf
[index
]) {
747 ieee80211_release_reorder_frame(sdata
, tid_agg_rx
, index
,
749 index
= ieee80211_sn_sub(tid_agg_rx
->head_seq_num
,
751 tid_agg_rx
->buf_size
;
754 if (tid_agg_rx
->stored_mpdu_num
) {
755 j
= index
= ieee80211_sn_sub(tid_agg_rx
->head_seq_num
,
757 tid_agg_rx
->buf_size
;
759 for (; j
!= (index
- 1) % tid_agg_rx
->buf_size
;
760 j
= (j
+ 1) % tid_agg_rx
->buf_size
) {
761 if (tid_agg_rx
->reorder_buf
[j
])
767 mod_timer(&tid_agg_rx
->reorder_timer
,
768 tid_agg_rx
->reorder_time
[j
] + 1 +
769 HT_RX_REORDER_BUF_TIMEOUT
);
771 del_timer(&tid_agg_rx
->reorder_timer
);
776 * As this function belongs to the RX path it must be under
777 * rcu_read_lock protection. It returns false if the frame
778 * can be processed immediately, true if it was consumed.
780 static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data
*sdata
,
781 struct tid_ampdu_rx
*tid_agg_rx
,
783 struct sk_buff_head
*frames
)
785 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
786 u16 sc
= le16_to_cpu(hdr
->seq_ctrl
);
787 u16 mpdu_seq_num
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
788 u16 head_seq_num
, buf_size
;
792 spin_lock(&tid_agg_rx
->reorder_lock
);
794 buf_size
= tid_agg_rx
->buf_size
;
795 head_seq_num
= tid_agg_rx
->head_seq_num
;
797 /* frame with out of date sequence number */
798 if (ieee80211_sn_less(mpdu_seq_num
, head_seq_num
)) {
804 * If frame the sequence number exceeds our buffering window
805 * size release some previous frames to make room for this one.
807 if (!ieee80211_sn_less(mpdu_seq_num
, head_seq_num
+ buf_size
)) {
808 head_seq_num
= ieee80211_sn_inc(
809 ieee80211_sn_sub(mpdu_seq_num
, buf_size
));
810 /* release stored frames up to new head to stack */
811 ieee80211_release_reorder_frames(sdata
, tid_agg_rx
,
812 head_seq_num
, frames
);
815 /* Now the new frame is always in the range of the reordering buffer */
817 index
= ieee80211_sn_sub(mpdu_seq_num
,
818 tid_agg_rx
->ssn
) % tid_agg_rx
->buf_size
;
820 /* check if we already stored this frame */
821 if (tid_agg_rx
->reorder_buf
[index
]) {
827 * If the current MPDU is in the right order and nothing else
828 * is stored we can process it directly, no need to buffer it.
829 * If it is first but there's something stored, we may be able
830 * to release frames after this one.
832 if (mpdu_seq_num
== tid_agg_rx
->head_seq_num
&&
833 tid_agg_rx
->stored_mpdu_num
== 0) {
834 tid_agg_rx
->head_seq_num
=
835 ieee80211_sn_inc(tid_agg_rx
->head_seq_num
);
840 /* put the frame in the reordering buffer */
841 tid_agg_rx
->reorder_buf
[index
] = skb
;
842 tid_agg_rx
->reorder_time
[index
] = jiffies
;
843 tid_agg_rx
->stored_mpdu_num
++;
844 ieee80211_sta_reorder_release(sdata
, tid_agg_rx
, frames
);
847 spin_unlock(&tid_agg_rx
->reorder_lock
);
852 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
853 * true if the MPDU was buffered, false if it should be processed.
855 static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data
*rx
,
856 struct sk_buff_head
*frames
)
858 struct sk_buff
*skb
= rx
->skb
;
859 struct ieee80211_local
*local
= rx
->local
;
860 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
861 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
862 struct sta_info
*sta
= rx
->sta
;
863 struct tid_ampdu_rx
*tid_agg_rx
;
867 if (!ieee80211_is_data_qos(hdr
->frame_control
))
871 * filter the QoS data rx stream according to
872 * STA/TID and check if this STA/TID is on aggregation
878 ack_policy
= *ieee80211_get_qos_ctl(hdr
) &
879 IEEE80211_QOS_CTL_ACK_POLICY_MASK
;
880 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
882 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
886 /* qos null data frames are excluded */
887 if (unlikely(hdr
->frame_control
& cpu_to_le16(IEEE80211_STYPE_NULLFUNC
)))
890 /* not part of a BA session */
891 if (ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK
&&
892 ack_policy
!= IEEE80211_QOS_CTL_ACK_POLICY_NORMAL
)
895 /* not actually part of this BA session */
896 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
899 /* new, potentially un-ordered, ampdu frame - process it */
901 /* reset session timer */
902 if (tid_agg_rx
->timeout
)
903 tid_agg_rx
->last_rx
= jiffies
;
905 /* if this mpdu is fragmented - terminate rx aggregation session */
906 sc
= le16_to_cpu(hdr
->seq_ctrl
);
907 if (sc
& IEEE80211_SCTL_FRAG
) {
908 skb
->pkt_type
= IEEE80211_SDATA_QUEUE_TYPE_FRAME
;
909 skb_queue_tail(&rx
->sdata
->skb_queue
, skb
);
910 ieee80211_queue_work(&local
->hw
, &rx
->sdata
->work
);
915 * No locking needed -- we will only ever process one
916 * RX packet at a time, and thus own tid_agg_rx. All
917 * other code manipulating it needs to (and does) make
918 * sure that we cannot get to it any more before doing
921 if (ieee80211_sta_manage_reorder_buf(rx
->sdata
, tid_agg_rx
, skb
,
926 __skb_queue_tail(frames
, skb
);
929 static ieee80211_rx_result debug_noinline
930 ieee80211_rx_h_check(struct ieee80211_rx_data
*rx
)
932 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
933 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
935 /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
936 if (rx
->sta
&& !is_multicast_ether_addr(hdr
->addr1
)) {
937 if (unlikely(ieee80211_has_retry(hdr
->frame_control
) &&
938 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] ==
940 if (status
->rx_flags
& IEEE80211_RX_RA_MATCH
) {
941 rx
->local
->dot11FrameDuplicateCount
++;
942 rx
->sta
->num_duplicates
++;
944 return RX_DROP_UNUSABLE
;
946 rx
->sta
->last_seq_ctrl
[rx
->seqno_idx
] = hdr
->seq_ctrl
;
949 if (unlikely(rx
->skb
->len
< 16)) {
950 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_short
);
951 return RX_DROP_MONITOR
;
954 /* Drop disallowed frame classes based on STA auth/assoc state;
955 * IEEE 802.11, Chap 5.5.
957 * mac80211 filters only based on association state, i.e. it drops
958 * Class 3 frames from not associated stations. hostapd sends
959 * deauth/disassoc frames when needed. In addition, hostapd is
960 * responsible for filtering on both auth and assoc states.
963 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
964 return ieee80211_rx_mesh_check(rx
);
966 if (unlikely((ieee80211_is_data(hdr
->frame_control
) ||
967 ieee80211_is_pspoll(hdr
->frame_control
)) &&
968 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
969 rx
->sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&&
970 (!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_ASSOC
)))) {
972 * accept port control frames from the AP even when it's not
973 * yet marked ASSOC to prevent a race where we don't set the
974 * assoc bit quickly enough before it sends the first frame
976 if (rx
->sta
&& rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
977 ieee80211_is_data_present(hdr
->frame_control
)) {
981 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
983 if (rx
->skb
->len
< hdrlen
+ 8)
984 return RX_DROP_MONITOR
;
986 skb_copy_bits(rx
->skb
, hdrlen
+ 6, ðertype
, 2);
987 if (ethertype
== rx
->sdata
->control_port_protocol
)
991 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
992 cfg80211_rx_spurious_frame(rx
->sdata
->dev
,
995 return RX_DROP_UNUSABLE
;
997 return RX_DROP_MONITOR
;
1004 static ieee80211_rx_result debug_noinline
1005 ieee80211_rx_h_decrypt(struct ieee80211_rx_data
*rx
)
1007 struct sk_buff
*skb
= rx
->skb
;
1008 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1009 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1012 ieee80211_rx_result result
= RX_DROP_UNUSABLE
;
1013 struct ieee80211_key
*sta_ptk
= NULL
;
1014 int mmie_keyidx
= -1;
1020 * There are four types of keys:
1021 * - GTK (group keys)
1022 * - IGTK (group keys for management frames)
1023 * - PTK (pairwise keys)
1024 * - STK (station-to-station pairwise keys)
1026 * When selecting a key, we have to distinguish between multicast
1027 * (including broadcast) and unicast frames, the latter can only
1028 * use PTKs and STKs while the former always use GTKs and IGTKs.
1029 * Unless, of course, actual WEP keys ("pre-RSNA") are used, then
1030 * unicast frames can also use key indices like GTKs. Hence, if we
1031 * don't have a PTK/STK we check the key index for a WEP key.
1033 * Note that in a regular BSS, multicast frames are sent by the
1034 * AP only, associated stations unicast the frame to the AP first
1035 * which then multicasts it on their behalf.
1037 * There is also a slight problem in IBSS mode: GTKs are negotiated
1038 * with each station, that is something we don't currently handle.
1039 * The spec seems to expect that one negotiates the same key with
1040 * every station but there's no such requirement; VLANs could be
1045 * No point in finding a key and decrypting if the frame is neither
1046 * addressed to us nor a multicast frame.
1048 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
1051 /* start without a key */
1055 sta_ptk
= rcu_dereference(rx
->sta
->ptk
);
1057 fc
= hdr
->frame_control
;
1059 if (!ieee80211_has_protected(fc
))
1060 mmie_keyidx
= ieee80211_get_mmie_keyidx(rx
->skb
);
1062 if (!is_multicast_ether_addr(hdr
->addr1
) && sta_ptk
) {
1064 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1065 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1067 /* Skip decryption if the frame is not protected. */
1068 if (!ieee80211_has_protected(fc
))
1070 } else if (mmie_keyidx
>= 0) {
1071 /* Broadcast/multicast robust management frame / BIP */
1072 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1073 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1076 if (mmie_keyidx
< NUM_DEFAULT_KEYS
||
1077 mmie_keyidx
>= NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
)
1078 return RX_DROP_MONITOR
; /* unexpected BIP keyidx */
1080 rx
->key
= rcu_dereference(rx
->sta
->gtk
[mmie_keyidx
]);
1082 rx
->key
= rcu_dereference(rx
->sdata
->keys
[mmie_keyidx
]);
1083 } else if (!ieee80211_has_protected(fc
)) {
1085 * The frame was not protected, so skip decryption. However, we
1086 * need to set rx->key if there is a key that could have been
1087 * used so that the frame may be dropped if encryption would
1088 * have been expected.
1090 struct ieee80211_key
*key
= NULL
;
1091 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1094 if (ieee80211_is_mgmt(fc
) &&
1095 is_multicast_ether_addr(hdr
->addr1
) &&
1096 (key
= rcu_dereference(rx
->sdata
->default_mgmt_key
)))
1100 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
1101 key
= rcu_dereference(rx
->sta
->gtk
[i
]);
1107 for (i
= 0; i
< NUM_DEFAULT_KEYS
; i
++) {
1108 key
= rcu_dereference(sdata
->keys
[i
]);
1120 * The device doesn't give us the IV so we won't be
1121 * able to look up the key. That's ok though, we
1122 * don't need to decrypt the frame, we just won't
1123 * be able to keep statistics accurate.
1124 * Except for key threshold notifications, should
1125 * we somehow allow the driver to tell us which key
1126 * the hardware used if this flag is set?
1128 if ((status
->flag
& RX_FLAG_DECRYPTED
) &&
1129 (status
->flag
& RX_FLAG_IV_STRIPPED
))
1132 hdrlen
= ieee80211_hdrlen(fc
);
1134 if (rx
->skb
->len
< 8 + hdrlen
)
1135 return RX_DROP_UNUSABLE
; /* TODO: count this? */
1138 * no need to call ieee80211_wep_get_keyidx,
1139 * it verifies a bunch of things we've done already
1141 skb_copy_bits(rx
->skb
, hdrlen
+ 3, &keyid
, 1);
1142 keyidx
= keyid
>> 6;
1144 /* check per-station GTK first, if multicast packet */
1145 if (is_multicast_ether_addr(hdr
->addr1
) && rx
->sta
)
1146 rx
->key
= rcu_dereference(rx
->sta
->gtk
[keyidx
]);
1148 /* if not found, try default key */
1150 rx
->key
= rcu_dereference(rx
->sdata
->keys
[keyidx
]);
1153 * RSNA-protected unicast frames should always be
1154 * sent with pairwise or station-to-station keys,
1155 * but for WEP we allow using a key index as well.
1158 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP40
&&
1159 rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_WEP104
&&
1160 !is_multicast_ether_addr(hdr
->addr1
))
1166 if (unlikely(rx
->key
->flags
& KEY_FLAG_TAINTED
))
1167 return RX_DROP_MONITOR
;
1169 rx
->key
->tx_rx_count
++;
1170 /* TODO: add threshold stuff again */
1172 return RX_DROP_MONITOR
;
1175 switch (rx
->key
->conf
.cipher
) {
1176 case WLAN_CIPHER_SUITE_WEP40
:
1177 case WLAN_CIPHER_SUITE_WEP104
:
1178 result
= ieee80211_crypto_wep_decrypt(rx
);
1180 case WLAN_CIPHER_SUITE_TKIP
:
1181 result
= ieee80211_crypto_tkip_decrypt(rx
);
1183 case WLAN_CIPHER_SUITE_CCMP
:
1184 result
= ieee80211_crypto_ccmp_decrypt(rx
);
1186 case WLAN_CIPHER_SUITE_AES_CMAC
:
1187 result
= ieee80211_crypto_aes_cmac_decrypt(rx
);
1191 * We can reach here only with HW-only algorithms
1192 * but why didn't it decrypt the frame?!
1194 return RX_DROP_UNUSABLE
;
1197 /* the hdr variable is invalid after the decrypt handlers */
1199 /* either the frame has been decrypted or will be dropped */
1200 status
->flag
|= RX_FLAG_DECRYPTED
;
1205 static ieee80211_rx_result debug_noinline
1206 ieee80211_rx_h_check_more_data(struct ieee80211_rx_data
*rx
)
1208 struct ieee80211_local
*local
;
1209 struct ieee80211_hdr
*hdr
;
1210 struct sk_buff
*skb
;
1214 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1216 if (!local
->pspolling
)
1219 if (!ieee80211_has_fromds(hdr
->frame_control
))
1220 /* this is not from AP */
1223 if (!ieee80211_is_data(hdr
->frame_control
))
1226 if (!ieee80211_has_moredata(hdr
->frame_control
)) {
1227 /* AP has no more frames buffered for us */
1228 local
->pspolling
= false;
1232 /* more data bit is set, let's request a new frame from the AP */
1233 ieee80211_send_pspoll(local
, rx
->sdata
);
1238 static void sta_ps_start(struct sta_info
*sta
)
1240 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1241 struct ieee80211_local
*local
= sdata
->local
;
1244 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1245 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1246 ps
= &sdata
->bss
->ps
;
1250 atomic_inc(&ps
->num_sta_ps
);
1251 set_sta_flag(sta
, WLAN_STA_PS_STA
);
1252 if (!(local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
))
1253 drv_sta_notify(local
, sdata
, STA_NOTIFY_SLEEP
, &sta
->sta
);
1254 ps_dbg(sdata
, "STA %pM aid %d enters power save mode\n",
1255 sta
->sta
.addr
, sta
->sta
.aid
);
1258 static void sta_ps_end(struct sta_info
*sta
)
1260 ps_dbg(sta
->sdata
, "STA %pM aid %d exits power save mode\n",
1261 sta
->sta
.addr
, sta
->sta
.aid
);
1263 if (test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) {
1264 ps_dbg(sta
->sdata
, "STA %pM aid %d driver-ps-blocked\n",
1265 sta
->sta
.addr
, sta
->sta
.aid
);
1269 ieee80211_sta_ps_deliver_wakeup(sta
);
1272 int ieee80211_sta_ps_transition(struct ieee80211_sta
*sta
, bool start
)
1274 struct sta_info
*sta_inf
= container_of(sta
, struct sta_info
, sta
);
1277 WARN_ON(!(sta_inf
->local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
));
1279 /* Don't let the same PS state be set twice */
1280 in_ps
= test_sta_flag(sta_inf
, WLAN_STA_PS_STA
);
1281 if ((start
&& in_ps
) || (!start
&& !in_ps
))
1285 sta_ps_start(sta_inf
);
1287 sta_ps_end(sta_inf
);
1291 EXPORT_SYMBOL(ieee80211_sta_ps_transition
);
1293 static ieee80211_rx_result debug_noinline
1294 ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data
*rx
)
1296 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1297 struct ieee80211_hdr
*hdr
= (void *)rx
->skb
->data
;
1298 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1301 if (!rx
->sta
|| !(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
1304 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
1305 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
)
1309 * The device handles station powersave, so don't do anything about
1310 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1311 * it to mac80211 since they're handled.)
1313 if (sdata
->local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
)
1317 * Don't do anything if the station isn't already asleep. In
1318 * the uAPSD case, the station will probably be marked asleep,
1319 * in the PS-Poll case the station must be confused ...
1321 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_STA
))
1324 if (unlikely(ieee80211_is_pspoll(hdr
->frame_control
))) {
1325 if (!test_sta_flag(rx
->sta
, WLAN_STA_SP
)) {
1326 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_DRIVER
))
1327 ieee80211_sta_ps_deliver_poll_response(rx
->sta
);
1329 set_sta_flag(rx
->sta
, WLAN_STA_PSPOLL
);
1332 /* Free PS Poll skb here instead of returning RX_DROP that would
1333 * count as an dropped frame. */
1334 dev_kfree_skb(rx
->skb
);
1337 } else if (!ieee80211_has_morefrags(hdr
->frame_control
) &&
1338 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1339 ieee80211_has_pm(hdr
->frame_control
) &&
1340 (ieee80211_is_data_qos(hdr
->frame_control
) ||
1341 ieee80211_is_qos_nullfunc(hdr
->frame_control
))) {
1342 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
1343 ac
= ieee802_1d_to_ac
[tid
& 7];
1346 * If this AC is not trigger-enabled do nothing.
1348 * NB: This could/should check a separate bitmap of trigger-
1349 * enabled queues, but for now we only implement uAPSD w/o
1350 * TSPEC changes to the ACs, so they're always the same.
1352 if (!(rx
->sta
->sta
.uapsd_queues
& BIT(ac
)))
1355 /* if we are in a service period, do nothing */
1356 if (test_sta_flag(rx
->sta
, WLAN_STA_SP
))
1359 if (!test_sta_flag(rx
->sta
, WLAN_STA_PS_DRIVER
))
1360 ieee80211_sta_ps_deliver_uapsd(rx
->sta
);
1362 set_sta_flag(rx
->sta
, WLAN_STA_UAPSD
);
1368 static ieee80211_rx_result debug_noinline
1369 ieee80211_rx_h_sta_process(struct ieee80211_rx_data
*rx
)
1371 struct sta_info
*sta
= rx
->sta
;
1372 struct sk_buff
*skb
= rx
->skb
;
1373 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1374 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1380 * Update last_rx only for IBSS packets which are for the current
1381 * BSSID and for station already AUTHORIZED to avoid keeping the
1382 * current IBSS network alive in cases where other STAs start
1383 * using different BSSID. This will also give the station another
1384 * chance to restart the authentication/authorization in case
1385 * something went wrong the first time.
1387 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
1388 u8
*bssid
= ieee80211_get_bssid(hdr
, rx
->skb
->len
,
1389 NL80211_IFTYPE_ADHOC
);
1390 if (ether_addr_equal(bssid
, rx
->sdata
->u
.ibss
.bssid
) &&
1391 test_sta_flag(sta
, WLAN_STA_AUTHORIZED
)) {
1392 sta
->last_rx
= jiffies
;
1393 if (ieee80211_is_data(hdr
->frame_control
)) {
1394 sta
->last_rx_rate_idx
= status
->rate_idx
;
1395 sta
->last_rx_rate_flag
= status
->flag
;
1396 sta
->last_rx_rate_vht_nss
= status
->vht_nss
;
1399 } else if (!is_multicast_ether_addr(hdr
->addr1
)) {
1401 * Mesh beacons will update last_rx when if they are found to
1402 * match the current local configuration when processed.
1404 sta
->last_rx
= jiffies
;
1405 if (ieee80211_is_data(hdr
->frame_control
)) {
1406 sta
->last_rx_rate_idx
= status
->rate_idx
;
1407 sta
->last_rx_rate_flag
= status
->flag
;
1408 sta
->last_rx_rate_vht_nss
= status
->vht_nss
;
1412 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
1415 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
1416 ieee80211_sta_rx_notify(rx
->sdata
, hdr
);
1418 sta
->rx_fragments
++;
1419 sta
->rx_bytes
+= rx
->skb
->len
;
1420 if (!(status
->flag
& RX_FLAG_NO_SIGNAL_VAL
)) {
1421 sta
->last_signal
= status
->signal
;
1422 ewma_add(&sta
->avg_signal
, -status
->signal
);
1426 * Change STA power saving mode only at the end of a frame
1427 * exchange sequence.
1429 if (!(sta
->local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
) &&
1430 !ieee80211_has_morefrags(hdr
->frame_control
) &&
1431 !(status
->rx_flags
& IEEE80211_RX_DEFERRED_RELEASE
) &&
1432 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1433 rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)) {
1434 if (test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1436 * Ignore doze->wake transitions that are
1437 * indicated by non-data frames, the standard
1438 * is unclear here, but for example going to
1439 * PS mode and then scanning would cause a
1440 * doze->wake transition for the probe request,
1441 * and that is clearly undesirable.
1443 if (ieee80211_is_data(hdr
->frame_control
) &&
1444 !ieee80211_has_pm(hdr
->frame_control
))
1447 if (ieee80211_has_pm(hdr
->frame_control
))
1452 /* mesh power save support */
1453 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
1454 ieee80211_mps_rx_h_sta_process(sta
, hdr
);
1457 * Drop (qos-)data::nullfunc frames silently, since they
1458 * are used only to control station power saving mode.
1460 if (ieee80211_is_nullfunc(hdr
->frame_control
) ||
1461 ieee80211_is_qos_nullfunc(hdr
->frame_control
)) {
1462 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_nullfunc
);
1465 * If we receive a 4-addr nullfunc frame from a STA
1466 * that was not moved to a 4-addr STA vlan yet send
1467 * the event to userspace and for older hostapd drop
1468 * the frame to the monitor interface.
1470 if (ieee80211_has_a4(hdr
->frame_control
) &&
1471 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1472 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1473 !rx
->sdata
->u
.vlan
.sta
))) {
1474 if (!test_and_set_sta_flag(sta
, WLAN_STA_4ADDR_EVENT
))
1475 cfg80211_rx_unexpected_4addr_frame(
1476 rx
->sdata
->dev
, sta
->sta
.addr
,
1478 return RX_DROP_MONITOR
;
1481 * Update counter and free packet here to avoid
1482 * counting this as a dropped packed.
1485 dev_kfree_skb(rx
->skb
);
1490 } /* ieee80211_rx_h_sta_process */
1492 static inline struct ieee80211_fragment_entry
*
1493 ieee80211_reassemble_add(struct ieee80211_sub_if_data
*sdata
,
1494 unsigned int frag
, unsigned int seq
, int rx_queue
,
1495 struct sk_buff
**skb
)
1497 struct ieee80211_fragment_entry
*entry
;
1499 entry
= &sdata
->fragments
[sdata
->fragment_next
++];
1500 if (sdata
->fragment_next
>= IEEE80211_FRAGMENT_MAX
)
1501 sdata
->fragment_next
= 0;
1503 if (!skb_queue_empty(&entry
->skb_list
))
1504 __skb_queue_purge(&entry
->skb_list
);
1506 __skb_queue_tail(&entry
->skb_list
, *skb
); /* no need for locking */
1508 entry
->first_frag_time
= jiffies
;
1510 entry
->rx_queue
= rx_queue
;
1511 entry
->last_frag
= frag
;
1513 entry
->extra_len
= 0;
1518 static inline struct ieee80211_fragment_entry
*
1519 ieee80211_reassemble_find(struct ieee80211_sub_if_data
*sdata
,
1520 unsigned int frag
, unsigned int seq
,
1521 int rx_queue
, struct ieee80211_hdr
*hdr
)
1523 struct ieee80211_fragment_entry
*entry
;
1526 idx
= sdata
->fragment_next
;
1527 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++) {
1528 struct ieee80211_hdr
*f_hdr
;
1532 idx
= IEEE80211_FRAGMENT_MAX
- 1;
1534 entry
= &sdata
->fragments
[idx
];
1535 if (skb_queue_empty(&entry
->skb_list
) || entry
->seq
!= seq
||
1536 entry
->rx_queue
!= rx_queue
||
1537 entry
->last_frag
+ 1 != frag
)
1540 f_hdr
= (struct ieee80211_hdr
*)entry
->skb_list
.next
->data
;
1543 * Check ftype and addresses are equal, else check next fragment
1545 if (((hdr
->frame_control
^ f_hdr
->frame_control
) &
1546 cpu_to_le16(IEEE80211_FCTL_FTYPE
)) ||
1547 !ether_addr_equal(hdr
->addr1
, f_hdr
->addr1
) ||
1548 !ether_addr_equal(hdr
->addr2
, f_hdr
->addr2
))
1551 if (time_after(jiffies
, entry
->first_frag_time
+ 2 * HZ
)) {
1552 __skb_queue_purge(&entry
->skb_list
);
1561 static ieee80211_rx_result debug_noinline
1562 ieee80211_rx_h_defragment(struct ieee80211_rx_data
*rx
)
1564 struct ieee80211_hdr
*hdr
;
1567 unsigned int frag
, seq
;
1568 struct ieee80211_fragment_entry
*entry
;
1569 struct sk_buff
*skb
;
1570 struct ieee80211_rx_status
*status
;
1572 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1573 fc
= hdr
->frame_control
;
1575 if (ieee80211_is_ctl(fc
))
1578 sc
= le16_to_cpu(hdr
->seq_ctrl
);
1579 frag
= sc
& IEEE80211_SCTL_FRAG
;
1581 if (likely((!ieee80211_has_morefrags(fc
) && frag
== 0) ||
1582 is_multicast_ether_addr(hdr
->addr1
))) {
1583 /* not fragmented */
1586 I802_DEBUG_INC(rx
->local
->rx_handlers_fragments
);
1588 if (skb_linearize(rx
->skb
))
1589 return RX_DROP_UNUSABLE
;
1592 * skb_linearize() might change the skb->data and
1593 * previously cached variables (in this case, hdr) need to
1594 * be refreshed with the new data.
1596 hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1597 seq
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
1600 /* This is the first fragment of a new frame. */
1601 entry
= ieee80211_reassemble_add(rx
->sdata
, frag
, seq
,
1602 rx
->seqno_idx
, &(rx
->skb
));
1603 if (rx
->key
&& rx
->key
->conf
.cipher
== WLAN_CIPHER_SUITE_CCMP
&&
1604 ieee80211_has_protected(fc
)) {
1605 int queue
= rx
->security_idx
;
1606 /* Store CCMP PN so that we can verify that the next
1607 * fragment has a sequential PN value. */
1609 memcpy(entry
->last_pn
,
1610 rx
->key
->u
.ccmp
.rx_pn
[queue
],
1616 /* This is a fragment for a frame that should already be pending in
1617 * fragment cache. Add this fragment to the end of the pending entry.
1619 entry
= ieee80211_reassemble_find(rx
->sdata
, frag
, seq
,
1620 rx
->seqno_idx
, hdr
);
1622 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
1623 return RX_DROP_MONITOR
;
1626 /* Verify that MPDUs within one MSDU have sequential PN values.
1627 * (IEEE 802.11i, 8.3.3.4.5) */
1630 u8 pn
[CCMP_PN_LEN
], *rpn
;
1632 if (!rx
->key
|| rx
->key
->conf
.cipher
!= WLAN_CIPHER_SUITE_CCMP
)
1633 return RX_DROP_UNUSABLE
;
1634 memcpy(pn
, entry
->last_pn
, CCMP_PN_LEN
);
1635 for (i
= CCMP_PN_LEN
- 1; i
>= 0; i
--) {
1640 queue
= rx
->security_idx
;
1641 rpn
= rx
->key
->u
.ccmp
.rx_pn
[queue
];
1642 if (memcmp(pn
, rpn
, CCMP_PN_LEN
))
1643 return RX_DROP_UNUSABLE
;
1644 memcpy(entry
->last_pn
, pn
, CCMP_PN_LEN
);
1647 skb_pull(rx
->skb
, ieee80211_hdrlen(fc
));
1648 __skb_queue_tail(&entry
->skb_list
, rx
->skb
);
1649 entry
->last_frag
= frag
;
1650 entry
->extra_len
+= rx
->skb
->len
;
1651 if (ieee80211_has_morefrags(fc
)) {
1656 rx
->skb
= __skb_dequeue(&entry
->skb_list
);
1657 if (skb_tailroom(rx
->skb
) < entry
->extra_len
) {
1658 I802_DEBUG_INC(rx
->local
->rx_expand_skb_head2
);
1659 if (unlikely(pskb_expand_head(rx
->skb
, 0, entry
->extra_len
,
1661 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
1662 __skb_queue_purge(&entry
->skb_list
);
1663 return RX_DROP_UNUSABLE
;
1666 while ((skb
= __skb_dequeue(&entry
->skb_list
))) {
1667 memcpy(skb_put(rx
->skb
, skb
->len
), skb
->data
, skb
->len
);
1671 /* Complete frame has been reassembled - process it now */
1672 status
= IEEE80211_SKB_RXCB(rx
->skb
);
1673 status
->rx_flags
|= IEEE80211_RX_FRAGMENTED
;
1677 rx
->sta
->rx_packets
++;
1678 if (is_multicast_ether_addr(hdr
->addr1
))
1679 rx
->local
->dot11MulticastReceivedFrameCount
++;
1681 ieee80211_led_rx(rx
->local
);
1685 static int ieee80211_802_1x_port_control(struct ieee80211_rx_data
*rx
)
1687 if (unlikely(!rx
->sta
|| !test_sta_flag(rx
->sta
, WLAN_STA_AUTHORIZED
)))
1693 static int ieee80211_drop_unencrypted(struct ieee80211_rx_data
*rx
, __le16 fc
)
1695 struct sk_buff
*skb
= rx
->skb
;
1696 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1699 * Pass through unencrypted frames if the hardware has
1700 * decrypted them already.
1702 if (status
->flag
& RX_FLAG_DECRYPTED
)
1705 /* Drop unencrypted frames if key is set. */
1706 if (unlikely(!ieee80211_has_protected(fc
) &&
1707 !ieee80211_is_nullfunc(fc
) &&
1708 ieee80211_is_data(fc
) &&
1709 (rx
->key
|| rx
->sdata
->drop_unencrypted
)))
1715 static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data
*rx
)
1717 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1718 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1719 __le16 fc
= hdr
->frame_control
;
1722 * Pass through unencrypted frames if the hardware has
1723 * decrypted them already.
1725 if (status
->flag
& RX_FLAG_DECRYPTED
)
1728 if (rx
->sta
&& test_sta_flag(rx
->sta
, WLAN_STA_MFP
)) {
1729 if (unlikely(!ieee80211_has_protected(fc
) &&
1730 ieee80211_is_unicast_robust_mgmt_frame(rx
->skb
) &&
1732 if (ieee80211_is_deauth(fc
))
1733 cfg80211_send_unprot_deauth(rx
->sdata
->dev
,
1736 else if (ieee80211_is_disassoc(fc
))
1737 cfg80211_send_unprot_disassoc(rx
->sdata
->dev
,
1742 /* BIP does not use Protected field, so need to check MMIE */
1743 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx
->skb
) &&
1744 ieee80211_get_mmie_keyidx(rx
->skb
) < 0)) {
1745 if (ieee80211_is_deauth(fc
))
1746 cfg80211_send_unprot_deauth(rx
->sdata
->dev
,
1749 else if (ieee80211_is_disassoc(fc
))
1750 cfg80211_send_unprot_disassoc(rx
->sdata
->dev
,
1756 * When using MFP, Action frames are not allowed prior to
1757 * having configured keys.
1759 if (unlikely(ieee80211_is_action(fc
) && !rx
->key
&&
1760 ieee80211_is_robust_mgmt_frame(
1761 (struct ieee80211_hdr
*) rx
->skb
->data
)))
1769 __ieee80211_data_to_8023(struct ieee80211_rx_data
*rx
, bool *port_control
)
1771 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1772 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
1773 bool check_port_control
= false;
1774 struct ethhdr
*ehdr
;
1777 *port_control
= false;
1778 if (ieee80211_has_a4(hdr
->frame_control
) &&
1779 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& !sdata
->u
.vlan
.sta
)
1782 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1783 !!sdata
->u
.mgd
.use_4addr
!= !!ieee80211_has_a4(hdr
->frame_control
)) {
1785 if (!sdata
->u
.mgd
.use_4addr
)
1788 check_port_control
= true;
1791 if (is_multicast_ether_addr(hdr
->addr1
) &&
1792 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&& sdata
->u
.vlan
.sta
)
1795 ret
= ieee80211_data_to_8023(rx
->skb
, sdata
->vif
.addr
, sdata
->vif
.type
);
1799 ehdr
= (struct ethhdr
*) rx
->skb
->data
;
1800 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
)
1801 *port_control
= true;
1802 else if (check_port_control
)
1809 * requires that rx->skb is a frame with ethernet header
1811 static bool ieee80211_frame_allowed(struct ieee80211_rx_data
*rx
, __le16 fc
)
1813 static const u8 pae_group_addr
[ETH_ALEN
] __aligned(2)
1814 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
1815 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
1818 * Allow EAPOL frames to us/the PAE group address regardless
1819 * of whether the frame was encrypted or not.
1821 if (ehdr
->h_proto
== rx
->sdata
->control_port_protocol
&&
1822 (ether_addr_equal(ehdr
->h_dest
, rx
->sdata
->vif
.addr
) ||
1823 ether_addr_equal(ehdr
->h_dest
, pae_group_addr
)))
1826 if (ieee80211_802_1x_port_control(rx
) ||
1827 ieee80211_drop_unencrypted(rx
, fc
))
1834 * requires that rx->skb is a frame with ethernet header
1837 ieee80211_deliver_skb(struct ieee80211_rx_data
*rx
)
1839 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1840 struct net_device
*dev
= sdata
->dev
;
1841 struct sk_buff
*skb
, *xmit_skb
;
1842 struct ethhdr
*ehdr
= (struct ethhdr
*) rx
->skb
->data
;
1843 struct sta_info
*dsta
;
1844 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1849 if ((sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1850 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) &&
1851 !(sdata
->flags
& IEEE80211_SDATA_DONT_BRIDGE_PACKETS
) &&
1852 (status
->rx_flags
& IEEE80211_RX_RA_MATCH
) &&
1853 (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
|| !sdata
->u
.vlan
.sta
)) {
1854 if (is_multicast_ether_addr(ehdr
->h_dest
)) {
1856 * send multicast frames both to higher layers in
1857 * local net stack and back to the wireless medium
1859 xmit_skb
= skb_copy(skb
, GFP_ATOMIC
);
1861 net_info_ratelimited("%s: failed to clone multicast frame\n",
1864 dsta
= sta_info_get(sdata
, skb
->data
);
1867 * The destination station is associated to
1868 * this AP (in this VLAN), so send the frame
1869 * directly to it and do not pass it to local
1879 int align __maybe_unused
;
1881 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1883 * 'align' will only take the values 0 or 2 here
1884 * since all frames are required to be aligned
1885 * to 2-byte boundaries when being passed to
1886 * mac80211; the code here works just as well if
1887 * that isn't true, but mac80211 assumes it can
1888 * access fields as 2-byte aligned (e.g. for
1889 * compare_ether_addr)
1891 align
= ((unsigned long)(skb
->data
+ sizeof(struct ethhdr
))) & 3;
1893 if (WARN_ON(skb_headroom(skb
) < 3)) {
1897 u8
*data
= skb
->data
;
1898 size_t len
= skb_headlen(skb
);
1900 memmove(skb
->data
, data
, len
);
1901 skb_set_tail_pointer(skb
, len
);
1907 /* deliver to local stack */
1908 skb
->protocol
= eth_type_trans(skb
, dev
);
1909 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1910 netif_receive_skb(skb
);
1916 * Send to wireless media and increase priority by 256 to
1917 * keep the received priority instead of reclassifying
1918 * the frame (see cfg80211_classify8021d).
1920 xmit_skb
->priority
+= 256;
1921 xmit_skb
->protocol
= htons(ETH_P_802_3
);
1922 skb_reset_network_header(xmit_skb
);
1923 skb_reset_mac_header(xmit_skb
);
1924 dev_queue_xmit(xmit_skb
);
1928 static ieee80211_rx_result debug_noinline
1929 ieee80211_rx_h_amsdu(struct ieee80211_rx_data
*rx
)
1931 struct net_device
*dev
= rx
->sdata
->dev
;
1932 struct sk_buff
*skb
= rx
->skb
;
1933 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1934 __le16 fc
= hdr
->frame_control
;
1935 struct sk_buff_head frame_list
;
1936 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
1938 if (unlikely(!ieee80211_is_data(fc
)))
1941 if (unlikely(!ieee80211_is_data_present(fc
)))
1942 return RX_DROP_MONITOR
;
1944 if (!(status
->rx_flags
& IEEE80211_RX_AMSDU
))
1947 if (ieee80211_has_a4(hdr
->frame_control
) &&
1948 rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1949 !rx
->sdata
->u
.vlan
.sta
)
1950 return RX_DROP_UNUSABLE
;
1952 if (is_multicast_ether_addr(hdr
->addr1
) &&
1953 ((rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1954 rx
->sdata
->u
.vlan
.sta
) ||
1955 (rx
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1956 rx
->sdata
->u
.mgd
.use_4addr
)))
1957 return RX_DROP_UNUSABLE
;
1960 __skb_queue_head_init(&frame_list
);
1962 if (skb_linearize(skb
))
1963 return RX_DROP_UNUSABLE
;
1965 ieee80211_amsdu_to_8023s(skb
, &frame_list
, dev
->dev_addr
,
1966 rx
->sdata
->vif
.type
,
1967 rx
->local
->hw
.extra_tx_headroom
, true);
1969 while (!skb_queue_empty(&frame_list
)) {
1970 rx
->skb
= __skb_dequeue(&frame_list
);
1972 if (!ieee80211_frame_allowed(rx
, fc
)) {
1973 dev_kfree_skb(rx
->skb
);
1976 dev
->stats
.rx_packets
++;
1977 dev
->stats
.rx_bytes
+= rx
->skb
->len
;
1979 ieee80211_deliver_skb(rx
);
1985 #ifdef CONFIG_MAC80211_MESH
1986 static ieee80211_rx_result
1987 ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data
*rx
)
1989 struct ieee80211_hdr
*fwd_hdr
, *hdr
;
1990 struct ieee80211_tx_info
*info
;
1991 struct ieee80211s_hdr
*mesh_hdr
;
1992 struct sk_buff
*skb
= rx
->skb
, *fwd_skb
;
1993 struct ieee80211_local
*local
= rx
->local
;
1994 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
1995 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
1996 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1997 __le16 reason
= cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD
);
2000 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2001 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
2003 /* make sure fixed part of mesh header is there, also checks skb len */
2004 if (!pskb_may_pull(rx
->skb
, hdrlen
+ 6))
2005 return RX_DROP_MONITOR
;
2007 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2009 /* make sure full mesh header is there, also checks skb len */
2010 if (!pskb_may_pull(rx
->skb
,
2011 hdrlen
+ ieee80211_get_mesh_hdrlen(mesh_hdr
)))
2012 return RX_DROP_MONITOR
;
2014 /* reload pointers */
2015 hdr
= (struct ieee80211_hdr
*) skb
->data
;
2016 mesh_hdr
= (struct ieee80211s_hdr
*) (skb
->data
+ hdrlen
);
2018 /* frame is in RMC, don't forward */
2019 if (ieee80211_is_data(hdr
->frame_control
) &&
2020 is_multicast_ether_addr(hdr
->addr1
) &&
2021 mesh_rmc_check(rx
->sdata
, hdr
->addr3
, mesh_hdr
))
2022 return RX_DROP_MONITOR
;
2024 if (!ieee80211_is_data(hdr
->frame_control
) ||
2025 !(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
2029 return RX_DROP_MONITOR
;
2031 if (mesh_hdr
->flags
& MESH_FLAGS_AE
) {
2032 struct mesh_path
*mppath
;
2036 if (is_multicast_ether_addr(hdr
->addr1
)) {
2037 mpp_addr
= hdr
->addr3
;
2038 proxied_addr
= mesh_hdr
->eaddr1
;
2039 } else if (mesh_hdr
->flags
& MESH_FLAGS_AE_A5_A6
) {
2040 /* has_a4 already checked in ieee80211_rx_mesh_check */
2041 mpp_addr
= hdr
->addr4
;
2042 proxied_addr
= mesh_hdr
->eaddr2
;
2044 return RX_DROP_MONITOR
;
2048 mppath
= mpp_path_lookup(sdata
, proxied_addr
);
2050 mpp_path_add(sdata
, proxied_addr
, mpp_addr
);
2052 spin_lock_bh(&mppath
->state_lock
);
2053 if (!ether_addr_equal(mppath
->mpp
, mpp_addr
))
2054 memcpy(mppath
->mpp
, mpp_addr
, ETH_ALEN
);
2055 spin_unlock_bh(&mppath
->state_lock
);
2060 /* Frame has reached destination. Don't forward */
2061 if (!is_multicast_ether_addr(hdr
->addr1
) &&
2062 ether_addr_equal(sdata
->vif
.addr
, hdr
->addr3
))
2065 q
= ieee80211_select_queue_80211(sdata
, skb
, hdr
);
2066 if (ieee80211_queue_stopped(&local
->hw
, q
)) {
2067 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_congestion
);
2068 return RX_DROP_MONITOR
;
2070 skb_set_queue_mapping(skb
, q
);
2072 if (!--mesh_hdr
->ttl
) {
2073 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_ttl
);
2077 if (!ifmsh
->mshcfg
.dot11MeshForwarding
)
2080 fwd_skb
= skb_copy(skb
, GFP_ATOMIC
);
2082 net_info_ratelimited("%s: failed to clone mesh frame\n",
2087 fwd_hdr
= (struct ieee80211_hdr
*) fwd_skb
->data
;
2088 fwd_hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_RETRY
);
2089 info
= IEEE80211_SKB_CB(fwd_skb
);
2090 memset(info
, 0, sizeof(*info
));
2091 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
;
2092 info
->control
.vif
= &rx
->sdata
->vif
;
2093 info
->control
.jiffies
= jiffies
;
2094 if (is_multicast_ether_addr(fwd_hdr
->addr1
)) {
2095 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_mcast
);
2096 memcpy(fwd_hdr
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
2097 /* update power mode indication when forwarding */
2098 ieee80211_mps_set_frame_flags(sdata
, NULL
, fwd_hdr
);
2099 } else if (!mesh_nexthop_lookup(sdata
, fwd_skb
)) {
2100 /* mesh power mode flags updated in mesh_nexthop_lookup */
2101 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_unicast
);
2103 /* unable to resolve next hop */
2104 mesh_path_error_tx(sdata
, ifmsh
->mshcfg
.element_ttl
,
2105 fwd_hdr
->addr3
, 0, reason
, fwd_hdr
->addr2
);
2106 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, dropped_frames_no_route
);
2108 return RX_DROP_MONITOR
;
2111 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh
, fwded_frames
);
2112 ieee80211_add_pending_skb(local
, fwd_skb
);
2114 if (is_multicast_ether_addr(hdr
->addr1
) ||
2115 sdata
->dev
->flags
& IFF_PROMISC
)
2118 return RX_DROP_MONITOR
;
2122 static ieee80211_rx_result debug_noinline
2123 ieee80211_rx_h_data(struct ieee80211_rx_data
*rx
)
2125 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2126 struct ieee80211_local
*local
= rx
->local
;
2127 struct net_device
*dev
= sdata
->dev
;
2128 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)rx
->skb
->data
;
2129 __le16 fc
= hdr
->frame_control
;
2133 if (unlikely(!ieee80211_is_data(hdr
->frame_control
)))
2136 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
2137 return RX_DROP_MONITOR
;
2140 * Send unexpected-4addr-frame event to hostapd. For older versions,
2141 * also drop the frame to cooked monitor interfaces.
2143 if (ieee80211_has_a4(hdr
->frame_control
) &&
2144 sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
2146 !test_and_set_sta_flag(rx
->sta
, WLAN_STA_4ADDR_EVENT
))
2147 cfg80211_rx_unexpected_4addr_frame(
2148 rx
->sdata
->dev
, rx
->sta
->sta
.addr
, GFP_ATOMIC
);
2149 return RX_DROP_MONITOR
;
2152 err
= __ieee80211_data_to_8023(rx
, &port_control
);
2154 return RX_DROP_UNUSABLE
;
2156 if (!ieee80211_frame_allowed(rx
, fc
))
2157 return RX_DROP_MONITOR
;
2159 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
2160 unlikely(port_control
) && sdata
->bss
) {
2161 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
2169 dev
->stats
.rx_packets
++;
2170 dev
->stats
.rx_bytes
+= rx
->skb
->len
;
2172 if (local
->ps_sdata
&& local
->hw
.conf
.dynamic_ps_timeout
> 0 &&
2173 !is_multicast_ether_addr(
2174 ((struct ethhdr
*)rx
->skb
->data
)->h_dest
) &&
2175 (!local
->scanning
&&
2176 !test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
))) {
2177 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
2178 msecs_to_jiffies(local
->hw
.conf
.dynamic_ps_timeout
));
2181 ieee80211_deliver_skb(rx
);
2186 static ieee80211_rx_result debug_noinline
2187 ieee80211_rx_h_ctrl(struct ieee80211_rx_data
*rx
, struct sk_buff_head
*frames
)
2189 struct sk_buff
*skb
= rx
->skb
;
2190 struct ieee80211_bar
*bar
= (struct ieee80211_bar
*)skb
->data
;
2191 struct tid_ampdu_rx
*tid_agg_rx
;
2195 if (likely(!ieee80211_is_ctl(bar
->frame_control
)))
2198 if (ieee80211_is_back_req(bar
->frame_control
)) {
2200 __le16 control
, start_seq_num
;
2201 } __packed bar_data
;
2204 return RX_DROP_MONITOR
;
2206 if (skb_copy_bits(skb
, offsetof(struct ieee80211_bar
, control
),
2207 &bar_data
, sizeof(bar_data
)))
2208 return RX_DROP_MONITOR
;
2210 tid
= le16_to_cpu(bar_data
.control
) >> 12;
2212 tid_agg_rx
= rcu_dereference(rx
->sta
->ampdu_mlme
.tid_rx
[tid
]);
2214 return RX_DROP_MONITOR
;
2216 start_seq_num
= le16_to_cpu(bar_data
.start_seq_num
) >> 4;
2218 /* reset session timer */
2219 if (tid_agg_rx
->timeout
)
2220 mod_timer(&tid_agg_rx
->session_timer
,
2221 TU_TO_EXP_TIME(tid_agg_rx
->timeout
));
2223 spin_lock(&tid_agg_rx
->reorder_lock
);
2224 /* release stored frames up to start of BAR */
2225 ieee80211_release_reorder_frames(rx
->sdata
, tid_agg_rx
,
2226 start_seq_num
, frames
);
2227 spin_unlock(&tid_agg_rx
->reorder_lock
);
2234 * After this point, we only want management frames,
2235 * so we can drop all remaining control frames to
2236 * cooked monitor interfaces.
2238 return RX_DROP_MONITOR
;
2241 static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data
*sdata
,
2242 struct ieee80211_mgmt
*mgmt
,
2245 struct ieee80211_local
*local
= sdata
->local
;
2246 struct sk_buff
*skb
;
2247 struct ieee80211_mgmt
*resp
;
2249 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
)) {
2250 /* Not to own unicast address */
2254 if (!ether_addr_equal(mgmt
->sa
, sdata
->u
.mgd
.bssid
) ||
2255 !ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
)) {
2256 /* Not from the current AP or not associated yet. */
2260 if (len
< 24 + 1 + sizeof(resp
->u
.action
.u
.sa_query
)) {
2261 /* Too short SA Query request frame */
2265 skb
= dev_alloc_skb(sizeof(*resp
) + local
->hw
.extra_tx_headroom
);
2269 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2270 resp
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
2271 memset(resp
, 0, 24);
2272 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
2273 memcpy(resp
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2274 memcpy(resp
->bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2275 resp
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2276 IEEE80211_STYPE_ACTION
);
2277 skb_put(skb
, 1 + sizeof(resp
->u
.action
.u
.sa_query
));
2278 resp
->u
.action
.category
= WLAN_CATEGORY_SA_QUERY
;
2279 resp
->u
.action
.u
.sa_query
.action
= WLAN_ACTION_SA_QUERY_RESPONSE
;
2280 memcpy(resp
->u
.action
.u
.sa_query
.trans_id
,
2281 mgmt
->u
.action
.u
.sa_query
.trans_id
,
2282 WLAN_SA_QUERY_TR_ID_LEN
);
2284 ieee80211_tx_skb(sdata
, skb
);
2287 static ieee80211_rx_result debug_noinline
2288 ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data
*rx
)
2290 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
2291 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2294 * From here on, look only at management frames.
2295 * Data and control frames are already handled,
2296 * and unknown (reserved) frames are useless.
2298 if (rx
->skb
->len
< 24)
2299 return RX_DROP_MONITOR
;
2301 if (!ieee80211_is_mgmt(mgmt
->frame_control
))
2302 return RX_DROP_MONITOR
;
2304 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_AP
&&
2305 ieee80211_is_beacon(mgmt
->frame_control
) &&
2306 !(rx
->flags
& IEEE80211_RX_BEACON_REPORTED
)) {
2309 if (rx
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
2310 sig
= status
->signal
;
2312 cfg80211_report_obss_beacon(rx
->local
->hw
.wiphy
,
2313 rx
->skb
->data
, rx
->skb
->len
,
2315 rx
->flags
|= IEEE80211_RX_BEACON_REPORTED
;
2318 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
2319 return RX_DROP_MONITOR
;
2321 if (ieee80211_drop_unencrypted_mgmt(rx
))
2322 return RX_DROP_UNUSABLE
;
2327 static ieee80211_rx_result debug_noinline
2328 ieee80211_rx_h_action(struct ieee80211_rx_data
*rx
)
2330 struct ieee80211_local
*local
= rx
->local
;
2331 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2332 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
2333 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2334 int len
= rx
->skb
->len
;
2336 if (!ieee80211_is_action(mgmt
->frame_control
))
2339 /* drop too small frames */
2340 if (len
< IEEE80211_MIN_ACTION_SIZE
)
2341 return RX_DROP_UNUSABLE
;
2343 if (!rx
->sta
&& mgmt
->u
.action
.category
!= WLAN_CATEGORY_PUBLIC
&&
2344 mgmt
->u
.action
.category
!= WLAN_CATEGORY_SELF_PROTECTED
)
2345 return RX_DROP_UNUSABLE
;
2347 if (!(status
->rx_flags
& IEEE80211_RX_RA_MATCH
))
2348 return RX_DROP_UNUSABLE
;
2350 switch (mgmt
->u
.action
.category
) {
2351 case WLAN_CATEGORY_HT
:
2352 /* reject HT action frames from stations not supporting HT */
2353 if (!rx
->sta
->sta
.ht_cap
.ht_supported
)
2356 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2357 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
2358 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
2359 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
2360 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
2363 /* verify action & smps_control/chanwidth are present */
2364 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
2367 switch (mgmt
->u
.action
.u
.ht_smps
.action
) {
2368 case WLAN_HT_ACTION_SMPS
: {
2369 struct ieee80211_supported_band
*sband
;
2370 enum ieee80211_smps_mode smps_mode
;
2372 /* convert to HT capability */
2373 switch (mgmt
->u
.action
.u
.ht_smps
.smps_control
) {
2374 case WLAN_HT_SMPS_CONTROL_DISABLED
:
2375 smps_mode
= IEEE80211_SMPS_OFF
;
2377 case WLAN_HT_SMPS_CONTROL_STATIC
:
2378 smps_mode
= IEEE80211_SMPS_STATIC
;
2380 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
2381 smps_mode
= IEEE80211_SMPS_DYNAMIC
;
2387 /* if no change do nothing */
2388 if (rx
->sta
->sta
.smps_mode
== smps_mode
)
2390 rx
->sta
->sta
.smps_mode
= smps_mode
;
2392 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
2394 rate_control_rate_update(local
, sband
, rx
->sta
,
2395 IEEE80211_RC_SMPS_CHANGED
);
2398 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH
: {
2399 struct ieee80211_supported_band
*sband
;
2400 u8 chanwidth
= mgmt
->u
.action
.u
.ht_notify_cw
.chanwidth
;
2401 enum ieee80211_sta_rx_bandwidth new_bw
;
2403 /* If it doesn't support 40 MHz it can't change ... */
2404 if (!(rx
->sta
->sta
.ht_cap
.cap
&
2405 IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
2408 if (chanwidth
== IEEE80211_HT_CHANWIDTH_20MHZ
)
2409 new_bw
= IEEE80211_STA_RX_BW_20
;
2411 new_bw
= ieee80211_sta_cur_vht_bw(rx
->sta
);
2413 if (rx
->sta
->sta
.bandwidth
== new_bw
)
2416 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
2418 rate_control_rate_update(local
, sband
, rx
->sta
,
2419 IEEE80211_RC_BW_CHANGED
);
2427 case WLAN_CATEGORY_PUBLIC
:
2428 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
2430 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2434 if (!ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
))
2436 if (mgmt
->u
.action
.u
.ext_chan_switch
.action_code
!=
2437 WLAN_PUB_ACTION_EXT_CHANSW_ANN
)
2439 if (len
< offsetof(struct ieee80211_mgmt
,
2440 u
.action
.u
.ext_chan_switch
.variable
))
2443 case WLAN_CATEGORY_VHT
:
2444 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2445 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
2446 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
2447 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
2448 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
2451 /* verify action code is present */
2452 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
2455 switch (mgmt
->u
.action
.u
.vht_opmode_notif
.action_code
) {
2456 case WLAN_VHT_ACTION_OPMODE_NOTIF
: {
2459 /* verify opmode is present */
2460 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 2)
2463 opmode
= mgmt
->u
.action
.u
.vht_opmode_notif
.operating_mode
;
2465 ieee80211_vht_handle_opmode(rx
->sdata
, rx
->sta
,
2466 opmode
, status
->band
,
2474 case WLAN_CATEGORY_BACK
:
2475 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2476 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
&&
2477 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
2478 sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
2479 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
2482 /* verify action_code is present */
2483 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
2486 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
2487 case WLAN_ACTION_ADDBA_REQ
:
2488 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2489 sizeof(mgmt
->u
.action
.u
.addba_req
)))
2492 case WLAN_ACTION_ADDBA_RESP
:
2493 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2494 sizeof(mgmt
->u
.action
.u
.addba_resp
)))
2497 case WLAN_ACTION_DELBA
:
2498 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2499 sizeof(mgmt
->u
.action
.u
.delba
)))
2507 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2508 if (status
->band
!= IEEE80211_BAND_5GHZ
)
2511 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2514 /* verify action_code is present */
2515 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
2518 switch (mgmt
->u
.action
.u
.measurement
.action_code
) {
2519 case WLAN_ACTION_SPCT_MSR_REQ
:
2520 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2521 sizeof(mgmt
->u
.action
.u
.measurement
)))
2523 ieee80211_process_measurement_req(sdata
, mgmt
, len
);
2525 case WLAN_ACTION_SPCT_CHL_SWITCH
:
2526 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2529 if (!ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.bssid
))
2535 case WLAN_CATEGORY_SA_QUERY
:
2536 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2537 sizeof(mgmt
->u
.action
.u
.sa_query
)))
2540 switch (mgmt
->u
.action
.u
.sa_query
.action
) {
2541 case WLAN_ACTION_SA_QUERY_REQUEST
:
2542 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2544 ieee80211_process_sa_query_req(sdata
, mgmt
, len
);
2548 case WLAN_CATEGORY_SELF_PROTECTED
:
2549 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2550 sizeof(mgmt
->u
.action
.u
.self_prot
.action_code
)))
2553 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
2554 case WLAN_SP_MESH_PEERING_OPEN
:
2555 case WLAN_SP_MESH_PEERING_CLOSE
:
2556 case WLAN_SP_MESH_PEERING_CONFIRM
:
2557 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
2559 if (sdata
->u
.mesh
.user_mpm
)
2560 /* userspace handles this frame */
2563 case WLAN_SP_MGK_INFORM
:
2564 case WLAN_SP_MGK_ACK
:
2565 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
2570 case WLAN_CATEGORY_MESH_ACTION
:
2571 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2572 sizeof(mgmt
->u
.action
.u
.mesh_action
.action_code
)))
2575 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
2577 if (mesh_action_is_path_sel(mgmt
) &&
2578 !mesh_path_sel_is_hwmp(sdata
))
2586 status
->rx_flags
|= IEEE80211_RX_MALFORMED_ACTION_FRM
;
2587 /* will return in the next handlers */
2592 rx
->sta
->rx_packets
++;
2593 dev_kfree_skb(rx
->skb
);
2597 rx
->skb
->pkt_type
= IEEE80211_SDATA_QUEUE_TYPE_FRAME
;
2598 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
2599 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2601 rx
->sta
->rx_packets
++;
2605 static ieee80211_rx_result debug_noinline
2606 ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data
*rx
)
2608 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2611 /* skip known-bad action frames and return them in the next handler */
2612 if (status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
)
2616 * Getting here means the kernel doesn't know how to handle
2617 * it, but maybe userspace does ... include returned frames
2618 * so userspace can register for those to know whether ones
2619 * it transmitted were processed or returned.
2622 if (rx
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
2623 sig
= status
->signal
;
2625 if (cfg80211_rx_mgmt(&rx
->sdata
->wdev
, status
->freq
, sig
,
2626 rx
->skb
->data
, rx
->skb
->len
,
2629 rx
->sta
->rx_packets
++;
2630 dev_kfree_skb(rx
->skb
);
2637 static ieee80211_rx_result debug_noinline
2638 ieee80211_rx_h_action_return(struct ieee80211_rx_data
*rx
)
2640 struct ieee80211_local
*local
= rx
->local
;
2641 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*) rx
->skb
->data
;
2642 struct sk_buff
*nskb
;
2643 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2644 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(rx
->skb
);
2646 if (!ieee80211_is_action(mgmt
->frame_control
))
2650 * For AP mode, hostapd is responsible for handling any action
2651 * frames that we didn't handle, including returning unknown
2652 * ones. For all other modes we will return them to the sender,
2653 * setting the 0x80 bit in the action category, as required by
2654 * 802.11-2012 9.24.4.
2655 * Newer versions of hostapd shall also use the management frame
2656 * registration mechanisms, but older ones still use cooked
2657 * monitor interfaces so push all frames there.
2659 if (!(status
->rx_flags
& IEEE80211_RX_MALFORMED_ACTION_FRM
) &&
2660 (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
2661 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
2662 return RX_DROP_MONITOR
;
2664 if (is_multicast_ether_addr(mgmt
->da
))
2665 return RX_DROP_MONITOR
;
2667 /* do not return rejected action frames */
2668 if (mgmt
->u
.action
.category
& 0x80)
2669 return RX_DROP_UNUSABLE
;
2671 nskb
= skb_copy_expand(rx
->skb
, local
->hw
.extra_tx_headroom
, 0,
2674 struct ieee80211_mgmt
*nmgmt
= (void *)nskb
->data
;
2676 nmgmt
->u
.action
.category
|= 0x80;
2677 memcpy(nmgmt
->da
, nmgmt
->sa
, ETH_ALEN
);
2678 memcpy(nmgmt
->sa
, rx
->sdata
->vif
.addr
, ETH_ALEN
);
2680 memset(nskb
->cb
, 0, sizeof(nskb
->cb
));
2682 if (rx
->sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
2683 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(nskb
);
2685 info
->flags
= IEEE80211_TX_CTL_TX_OFFCHAN
|
2686 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
|
2687 IEEE80211_TX_CTL_NO_CCK_RATE
;
2688 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
2690 local
->hw
.offchannel_tx_hw_queue
;
2693 __ieee80211_tx_skb_tid_band(rx
->sdata
, nskb
, 7,
2696 dev_kfree_skb(rx
->skb
);
2700 static ieee80211_rx_result debug_noinline
2701 ieee80211_rx_h_mgmt(struct ieee80211_rx_data
*rx
)
2703 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2704 struct ieee80211_mgmt
*mgmt
= (void *)rx
->skb
->data
;
2707 stype
= mgmt
->frame_control
& cpu_to_le16(IEEE80211_FCTL_STYPE
);
2709 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
2710 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2711 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2712 return RX_DROP_MONITOR
;
2715 case cpu_to_le16(IEEE80211_STYPE_AUTH
):
2716 case cpu_to_le16(IEEE80211_STYPE_BEACON
):
2717 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP
):
2718 /* process for all: mesh, mlme, ibss */
2720 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP
):
2721 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP
):
2722 case cpu_to_le16(IEEE80211_STYPE_DEAUTH
):
2723 case cpu_to_le16(IEEE80211_STYPE_DISASSOC
):
2724 if (is_multicast_ether_addr(mgmt
->da
) &&
2725 !is_broadcast_ether_addr(mgmt
->da
))
2726 return RX_DROP_MONITOR
;
2728 /* process only for station */
2729 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2730 return RX_DROP_MONITOR
;
2732 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
):
2733 /* process only for ibss and mesh */
2734 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2735 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
2736 return RX_DROP_MONITOR
;
2739 return RX_DROP_MONITOR
;
2742 /* queue up frame and kick off work to process it */
2743 rx
->skb
->pkt_type
= IEEE80211_SDATA_QUEUE_TYPE_FRAME
;
2744 skb_queue_tail(&sdata
->skb_queue
, rx
->skb
);
2745 ieee80211_queue_work(&rx
->local
->hw
, &sdata
->work
);
2747 rx
->sta
->rx_packets
++;
2752 /* TODO: use IEEE80211_RX_FRAGMENTED */
2753 static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data
*rx
,
2754 struct ieee80211_rate
*rate
)
2756 struct ieee80211_sub_if_data
*sdata
;
2757 struct ieee80211_local
*local
= rx
->local
;
2758 struct sk_buff
*skb
= rx
->skb
, *skb2
;
2759 struct net_device
*prev_dev
= NULL
;
2760 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2761 int needed_headroom
;
2764 * If cooked monitor has been processed already, then
2765 * don't do it again. If not, set the flag.
2767 if (rx
->flags
& IEEE80211_RX_CMNTR
)
2769 rx
->flags
|= IEEE80211_RX_CMNTR
;
2771 /* If there are no cooked monitor interfaces, just free the SKB */
2772 if (!local
->cooked_mntrs
)
2775 /* room for the radiotap header based on driver features */
2776 needed_headroom
= ieee80211_rx_radiotap_space(local
, status
);
2778 if (skb_headroom(skb
) < needed_headroom
&&
2779 pskb_expand_head(skb
, needed_headroom
, 0, GFP_ATOMIC
))
2782 /* prepend radiotap information */
2783 ieee80211_add_rx_radiotap_header(local
, skb
, rate
, needed_headroom
,
2786 skb_set_mac_header(skb
, 0);
2787 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
2788 skb
->pkt_type
= PACKET_OTHERHOST
;
2789 skb
->protocol
= htons(ETH_P_802_2
);
2791 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
2792 if (!ieee80211_sdata_running(sdata
))
2795 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
||
2796 !(sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
))
2800 skb2
= skb_clone(skb
, GFP_ATOMIC
);
2802 skb2
->dev
= prev_dev
;
2803 netif_receive_skb(skb2
);
2807 prev_dev
= sdata
->dev
;
2808 sdata
->dev
->stats
.rx_packets
++;
2809 sdata
->dev
->stats
.rx_bytes
+= skb
->len
;
2813 skb
->dev
= prev_dev
;
2814 netif_receive_skb(skb
);
2822 static void ieee80211_rx_handlers_result(struct ieee80211_rx_data
*rx
,
2823 ieee80211_rx_result res
)
2826 case RX_DROP_MONITOR
:
2827 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
2829 rx
->sta
->rx_dropped
++;
2832 struct ieee80211_rate
*rate
= NULL
;
2833 struct ieee80211_supported_band
*sband
;
2834 struct ieee80211_rx_status
*status
;
2836 status
= IEEE80211_SKB_RXCB((rx
->skb
));
2838 sband
= rx
->local
->hw
.wiphy
->bands
[status
->band
];
2839 if (!(status
->flag
& RX_FLAG_HT
) &&
2840 !(status
->flag
& RX_FLAG_VHT
))
2841 rate
= &sband
->bitrates
[status
->rate_idx
];
2843 ieee80211_rx_cooked_monitor(rx
, rate
);
2846 case RX_DROP_UNUSABLE
:
2847 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_drop
);
2849 rx
->sta
->rx_dropped
++;
2850 dev_kfree_skb(rx
->skb
);
2853 I802_DEBUG_INC(rx
->sdata
->local
->rx_handlers_queued
);
2858 static void ieee80211_rx_handlers(struct ieee80211_rx_data
*rx
,
2859 struct sk_buff_head
*frames
)
2861 ieee80211_rx_result res
= RX_DROP_MONITOR
;
2862 struct sk_buff
*skb
;
2864 #define CALL_RXH(rxh) \
2867 if (res != RX_CONTINUE) \
2871 spin_lock_bh(&rx
->local
->rx_path_lock
);
2873 while ((skb
= __skb_dequeue(frames
))) {
2875 * all the other fields are valid across frames
2876 * that belong to an aMPDU since they are on the
2877 * same TID from the same station
2881 CALL_RXH(ieee80211_rx_h_decrypt
)
2882 CALL_RXH(ieee80211_rx_h_check_more_data
)
2883 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll
)
2884 CALL_RXH(ieee80211_rx_h_sta_process
)
2885 CALL_RXH(ieee80211_rx_h_defragment
)
2886 CALL_RXH(ieee80211_rx_h_michael_mic_verify
)
2887 /* must be after MMIC verify so header is counted in MPDU mic */
2888 #ifdef CONFIG_MAC80211_MESH
2889 if (ieee80211_vif_is_mesh(&rx
->sdata
->vif
))
2890 CALL_RXH(ieee80211_rx_h_mesh_fwding
);
2892 CALL_RXH(ieee80211_rx_h_amsdu
)
2893 CALL_RXH(ieee80211_rx_h_data
)
2895 /* special treatment -- needs the queue */
2896 res
= ieee80211_rx_h_ctrl(rx
, frames
);
2897 if (res
!= RX_CONTINUE
)
2900 CALL_RXH(ieee80211_rx_h_mgmt_check
)
2901 CALL_RXH(ieee80211_rx_h_action
)
2902 CALL_RXH(ieee80211_rx_h_userspace_mgmt
)
2903 CALL_RXH(ieee80211_rx_h_action_return
)
2904 CALL_RXH(ieee80211_rx_h_mgmt
)
2907 ieee80211_rx_handlers_result(rx
, res
);
2912 spin_unlock_bh(&rx
->local
->rx_path_lock
);
2915 static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data
*rx
)
2917 struct sk_buff_head reorder_release
;
2918 ieee80211_rx_result res
= RX_DROP_MONITOR
;
2920 __skb_queue_head_init(&reorder_release
);
2922 #define CALL_RXH(rxh) \
2925 if (res != RX_CONTINUE) \
2929 CALL_RXH(ieee80211_rx_h_check
)
2931 ieee80211_rx_reorder_ampdu(rx
, &reorder_release
);
2933 ieee80211_rx_handlers(rx
, &reorder_release
);
2937 ieee80211_rx_handlers_result(rx
, res
);
2943 * This function makes calls into the RX path, therefore
2944 * it has to be invoked under RCU read lock.
2946 void ieee80211_release_reorder_timeout(struct sta_info
*sta
, int tid
)
2948 struct sk_buff_head frames
;
2949 struct ieee80211_rx_data rx
= {
2951 .sdata
= sta
->sdata
,
2952 .local
= sta
->local
,
2953 /* This is OK -- must be QoS data frame */
2954 .security_idx
= tid
,
2958 struct tid_ampdu_rx
*tid_agg_rx
;
2960 tid_agg_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[tid
]);
2964 __skb_queue_head_init(&frames
);
2966 spin_lock(&tid_agg_rx
->reorder_lock
);
2967 ieee80211_sta_reorder_release(sta
->sdata
, tid_agg_rx
, &frames
);
2968 spin_unlock(&tid_agg_rx
->reorder_lock
);
2970 ieee80211_rx_handlers(&rx
, &frames
);
2973 /* main receive path */
2975 static int prepare_for_handlers(struct ieee80211_rx_data
*rx
,
2976 struct ieee80211_hdr
*hdr
)
2978 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
2979 struct sk_buff
*skb
= rx
->skb
;
2980 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
2981 u8
*bssid
= ieee80211_get_bssid(hdr
, skb
->len
, sdata
->vif
.type
);
2982 int multicast
= is_multicast_ether_addr(hdr
->addr1
);
2984 switch (sdata
->vif
.type
) {
2985 case NL80211_IFTYPE_STATION
:
2986 if (!bssid
&& !sdata
->u
.mgd
.use_4addr
)
2989 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
)) {
2990 if (!(sdata
->dev
->flags
& IFF_PROMISC
) ||
2991 sdata
->u
.mgd
.use_4addr
)
2993 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
2996 case NL80211_IFTYPE_ADHOC
:
2999 if (ieee80211_is_beacon(hdr
->frame_control
)) {
3001 } else if (!ieee80211_bssid_match(bssid
, sdata
->u
.ibss
.bssid
)) {
3003 } else if (!multicast
&&
3004 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
)) {
3005 if (!(sdata
->dev
->flags
& IFF_PROMISC
))
3007 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
3008 } else if (!rx
->sta
) {
3010 if (status
->flag
& (RX_FLAG_HT
| RX_FLAG_VHT
))
3011 rate_idx
= 0; /* TODO: HT/VHT rates */
3013 rate_idx
= status
->rate_idx
;
3014 ieee80211_ibss_rx_no_sta(sdata
, bssid
, hdr
->addr2
,
3018 case NL80211_IFTYPE_MESH_POINT
:
3020 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
)) {
3021 if (!(sdata
->dev
->flags
& IFF_PROMISC
))
3024 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
3027 case NL80211_IFTYPE_AP_VLAN
:
3028 case NL80211_IFTYPE_AP
:
3030 if (!ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
3032 } else if (!ieee80211_bssid_match(bssid
, sdata
->vif
.addr
)) {
3034 * Accept public action frames even when the
3035 * BSSID doesn't match, this is used for P2P
3036 * and location updates. Note that mac80211
3037 * itself never looks at these frames.
3040 !ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
))
3042 if (ieee80211_is_public_action(hdr
, skb
->len
))
3044 if (!ieee80211_is_beacon(hdr
->frame_control
))
3046 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
3049 case NL80211_IFTYPE_WDS
:
3050 if (bssid
|| !ieee80211_is_data(hdr
->frame_control
))
3052 if (!ether_addr_equal(sdata
->u
.wds
.remote_addr
, hdr
->addr2
))
3055 case NL80211_IFTYPE_P2P_DEVICE
:
3056 if (!ieee80211_is_public_action(hdr
, skb
->len
) &&
3057 !ieee80211_is_probe_req(hdr
->frame_control
) &&
3058 !ieee80211_is_probe_resp(hdr
->frame_control
) &&
3059 !ieee80211_is_beacon(hdr
->frame_control
))
3061 if (!ether_addr_equal(sdata
->vif
.addr
, hdr
->addr1
) &&
3063 status
->rx_flags
&= ~IEEE80211_RX_RA_MATCH
;
3066 /* should never get here */
3075 * This function returns whether or not the SKB
3076 * was destined for RX processing or not, which,
3077 * if consume is true, is equivalent to whether
3078 * or not the skb was consumed.
3080 static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data
*rx
,
3081 struct sk_buff
*skb
, bool consume
)
3083 struct ieee80211_local
*local
= rx
->local
;
3084 struct ieee80211_sub_if_data
*sdata
= rx
->sdata
;
3085 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3086 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
3090 status
->rx_flags
|= IEEE80211_RX_RA_MATCH
;
3091 prepares
= prepare_for_handlers(rx
, hdr
);
3097 skb
= skb_copy(skb
, GFP_ATOMIC
);
3099 if (net_ratelimit())
3100 wiphy_debug(local
->hw
.wiphy
,
3101 "failed to copy skb for %s\n",
3109 ieee80211_invoke_rx_handlers(rx
);
3114 * This is the actual Rx frames handler. as it blongs to Rx path it must
3115 * be called with rcu_read_lock protection.
3117 static void __ieee80211_rx_handle_packet(struct ieee80211_hw
*hw
,
3118 struct sk_buff
*skb
)
3120 struct ieee80211_local
*local
= hw_to_local(hw
);
3121 struct ieee80211_sub_if_data
*sdata
;
3122 struct ieee80211_hdr
*hdr
;
3124 struct ieee80211_rx_data rx
;
3125 struct ieee80211_sub_if_data
*prev
;
3126 struct sta_info
*sta
, *tmp
, *prev_sta
;
3129 fc
= ((struct ieee80211_hdr
*)skb
->data
)->frame_control
;
3130 memset(&rx
, 0, sizeof(rx
));
3134 if (ieee80211_is_data(fc
) || ieee80211_is_mgmt(fc
))
3135 local
->dot11ReceivedFragmentCount
++;
3137 if (ieee80211_is_mgmt(fc
)) {
3138 /* drop frame if too short for header */
3139 if (skb
->len
< ieee80211_hdrlen(fc
))
3142 err
= skb_linearize(skb
);
3144 err
= !pskb_may_pull(skb
, ieee80211_hdrlen(fc
));
3152 hdr
= (struct ieee80211_hdr
*)skb
->data
;
3153 ieee80211_parse_qos(&rx
);
3154 ieee80211_verify_alignment(&rx
);
3156 if (unlikely(ieee80211_is_probe_resp(hdr
->frame_control
) ||
3157 ieee80211_is_beacon(hdr
->frame_control
)))
3158 ieee80211_scan_rx(local
, skb
);
3160 if (ieee80211_is_data(fc
)) {
3163 for_each_sta_info(local
, hdr
->addr2
, sta
, tmp
) {
3170 rx
.sdata
= prev_sta
->sdata
;
3171 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
3178 rx
.sdata
= prev_sta
->sdata
;
3180 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
3188 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3189 if (!ieee80211_sdata_running(sdata
))
3192 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
3193 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
3197 * frame is destined for this interface, but if it's
3198 * not also for the previous one we handle that after
3199 * the loop to avoid copying the SKB once too much
3207 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
3209 ieee80211_prepare_and_rx_handle(&rx
, skb
, false);
3215 rx
.sta
= sta_info_get_bss(prev
, hdr
->addr2
);
3218 if (ieee80211_prepare_and_rx_handle(&rx
, skb
, true))
3227 * This is the receive path handler. It is called by a low level driver when an
3228 * 802.11 MPDU is received from the hardware.
3230 void ieee80211_rx(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
3232 struct ieee80211_local
*local
= hw_to_local(hw
);
3233 struct ieee80211_rate
*rate
= NULL
;
3234 struct ieee80211_supported_band
*sband
;
3235 struct ieee80211_rx_status
*status
= IEEE80211_SKB_RXCB(skb
);
3237 WARN_ON_ONCE(softirq_count() == 0);
3239 if (WARN_ON(status
->band
>= IEEE80211_NUM_BANDS
))
3242 sband
= local
->hw
.wiphy
->bands
[status
->band
];
3243 if (WARN_ON(!sband
))
3247 * If we're suspending, it is possible although not too likely
3248 * that we'd be receiving frames after having already partially
3249 * quiesced the stack. We can't process such frames then since
3250 * that might, for example, cause stations to be added or other
3251 * driver callbacks be invoked.
3253 if (unlikely(local
->quiescing
|| local
->suspended
))
3256 /* We might be during a HW reconfig, prevent Rx for the same reason */
3257 if (unlikely(local
->in_reconfig
))
3261 * The same happens when we're not even started,
3262 * but that's worth a warning.
3264 if (WARN_ON(!local
->started
))
3267 if (likely(!(status
->flag
& RX_FLAG_FAILED_PLCP_CRC
))) {
3269 * Validate the rate, unless a PLCP error means that
3270 * we probably can't have a valid rate here anyway.
3273 if (status
->flag
& RX_FLAG_HT
) {
3275 * rate_idx is MCS index, which can be [0-76]
3278 * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
3280 * Anything else would be some sort of driver or
3281 * hardware error. The driver should catch hardware
3284 if (WARN(status
->rate_idx
> 76,
3285 "Rate marked as an HT rate but passed "
3286 "status->rate_idx is not "
3287 "an MCS index [0-76]: %d (0x%02x)\n",
3291 } else if (status
->flag
& RX_FLAG_VHT
) {
3292 if (WARN_ONCE(status
->rate_idx
> 9 ||
3294 status
->vht_nss
> 8,
3295 "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
3296 status
->rate_idx
, status
->vht_nss
))
3299 if (WARN_ON(status
->rate_idx
>= sband
->n_bitrates
))
3301 rate
= &sband
->bitrates
[status
->rate_idx
];
3305 status
->rx_flags
= 0;
3308 * key references and virtual interfaces are protected using RCU
3309 * and this requires that we are in a read-side RCU section during
3310 * receive processing
3315 * Frames with failed FCS/PLCP checksum are not returned,
3316 * all other frames are returned without radiotap header
3317 * if it was previously present.
3318 * Also, frames with less than 16 bytes are dropped.
3320 skb
= ieee80211_rx_monitor(local
, skb
, rate
);
3326 ieee80211_tpt_led_trig_rx(local
,
3327 ((struct ieee80211_hdr
*)skb
->data
)->frame_control
,
3329 __ieee80211_rx_handle_packet(hw
, skb
);
3337 EXPORT_SYMBOL(ieee80211_rx
);
3339 /* This is a version of the rx handler that can be called from hard irq
3340 * context. Post the skb on the queue and schedule the tasklet */
3341 void ieee80211_rx_irqsafe(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
3343 struct ieee80211_local
*local
= hw_to_local(hw
);
3345 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status
) > sizeof(skb
->cb
));
3347 skb
->pkt_type
= IEEE80211_RX_MSG
;
3348 skb_queue_tail(&local
->skb_queue
, skb
);
3349 tasklet_schedule(&local
->tasklet
);
3351 EXPORT_SYMBOL(ieee80211_rx_irqsafe
);