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mac80211: split hardware scan by band
[linux-2.6-block.git] / net / mac80211 / rx.c
CommitLineData
571ecf67
JB		 1/*
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 Johannes Berg <johannes@sipsolutions.net>
6 *
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.
10 */
11
ab46623e 12#include <linux/jiffies.h>
571ecf67
JB		 13#include <linux/kernel.h>
14#include <linux/skbuff.h>
15#include <linux/netdevice.h>
16#include <linux/etherdevice.h>
d4e46a3d 17#include <linux/rcupdate.h>
571ecf67
JB		 18#include <net/mac80211.h>
19#include <net/ieee80211_radiotap.h>
20
21#include "ieee80211_i.h"
24487981 22#include "driver-ops.h"
2c8dccc7 23#include "led.h"
33b64eb2 24#include "mesh.h"
571ecf67
JB		 25#include "wep.h"
26#include "wpa.h"
27#include "tkip.h"
28#include "wme.h"
29
c6a1fa12
JB		 30static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
31 struct tid_ampdu_rx *tid_agg_rx,
32 struct sk_buff *skb,
33 u16 mpdu_seq_num,
34 int bar_req);
b2e7771e
JB		 35/*
36 * monitor mode reception
37 *
38 * This function cleans up the SKB, i.e. it removes all the stuff
39 * only useful for monitoring.
40 */
41static struct sk_buff *remove_monitor_info(struct ieee80211_local *local,
42 struct sk_buff *skb,
43 int rtap_len)
44{
45 skb_pull(skb, rtap_len);
46
47 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) {
48 if (likely(skb->len > FCS_LEN))
49 skb_trim(skb, skb->len - FCS_LEN);
50 else {
51 /* driver bug */
52 WARN_ON(1);
53 dev_kfree_skb(skb);
54 skb = NULL;
55 }
56 }
57
58 return skb;
59}
60
f1d58c25 61static inline int should_drop_frame(struct sk_buff *skb,
b2e7771e
JB		 62 int present_fcs_len,
63 int radiotap_len)
64{
f1d58c25 65 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
182503ab 66 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
b2e7771e
JB		 67
68 if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
69 return 1;
70 if (unlikely(skb->len < 16 + present_fcs_len + radiotap_len))
71 return 1;
87228f57
HH		 72 if (ieee80211_is_ctl(hdr->frame_control) &&
73 !ieee80211_is_pspoll(hdr->frame_control) &&
74 !ieee80211_is_back_req(hdr->frame_control))
b2e7771e
JB		 75 return 1;
76 return 0;
77}
78
601ae7f2
BR		 79static int
80ieee80211_rx_radiotap_len(struct ieee80211_local *local,
81 struct ieee80211_rx_status *status)
82{
83 int len;
84
85 /* always present fields */
86 len = sizeof(struct ieee80211_radiotap_header) + 9;
87
88 if (status->flag & RX_FLAG_TSFT)
89 len += 8;
7fee5372 90 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
601ae7f2
BR		 91 len += 1;
92 if (local->hw.flags & IEEE80211_HW_NOISE_DBM)
93 len += 1;
94
95 if (len & 1) /* padding for RX_FLAGS if necessary */
96 len++;
97
98 /* make sure radiotap starts at a naturally aligned address */
99 if (len % 8)
100 len = roundup(len, 8);
101
102 return len;
103}
104
d1c3a37c 105/*
601ae7f2
BR		 106 * ieee80211_add_rx_radiotap_header - add radiotap header
107 *
108 * add a radiotap header containing all the fields which the hardware provided.
109 */
110static void
111ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
112 struct sk_buff *skb,
601ae7f2
BR		 113 struct ieee80211_rate *rate,
114 int rtap_len)
115{
f1d58c25 116 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
601ae7f2
BR		 117 struct ieee80211_radiotap_header *rthdr;
118 unsigned char *pos;
119
120 rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len);
121 memset(rthdr, 0, rtap_len);
122
123 /* radiotap header, set always present flags */
124 rthdr->it_present =
125 cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
601ae7f2
BR		 126 (1 << IEEE80211_RADIOTAP_CHANNEL) |
127 (1 << IEEE80211_RADIOTAP_ANTENNA) |
128 (1 << IEEE80211_RADIOTAP_RX_FLAGS));
129 rthdr->it_len = cpu_to_le16(rtap_len);
130
131 pos = (unsigned char *)(rthdr+1);
132
133 /* the order of the following fields is important */
134
135 /* IEEE80211_RADIOTAP_TSFT */
136 if (status->flag & RX_FLAG_TSFT) {
137 *(__le64 *)pos = cpu_to_le64(status->mactime);
138 rthdr->it_present |=
139 cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT);
140 pos += 8;
141 }
142
143 /* IEEE80211_RADIOTAP_FLAGS */
144 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
145 *pos |= IEEE80211_RADIOTAP_F_FCS;
aae89831
JB		 146 if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
147 *pos |= IEEE80211_RADIOTAP_F_BADFCS;
b4f28bbb
BR		 148 if (status->flag & RX_FLAG_SHORTPRE)
149 *pos |= IEEE80211_RADIOTAP_F_SHORTPRE;
601ae7f2
BR		 150 pos++;
151
152 /* IEEE80211_RADIOTAP_RATE */
0fb8ca45
JM		 153 if (status->flag & RX_FLAG_HT) {
154 /*
155 * TODO: add following information into radiotap header once
156 * suitable fields are defined for it:
157 * - MCS index (status->rate_idx)
158 * - HT40 (status->flag & RX_FLAG_40MHZ)
159 * - short-GI (status->flag & RX_FLAG_SHORT_GI)
160 */
161 *pos = 0;
8d6f658e 162 } else {
ebe6c7ba 163 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
0fb8ca45 164 *pos = rate->bitrate / 5;
8d6f658e 165 }
601ae7f2
BR		 166 pos++;
167
168 /* IEEE80211_RADIOTAP_CHANNEL */
169 *(__le16 *)pos = cpu_to_le16(status->freq);
170 pos += 2;
171 if (status->band == IEEE80211_BAND_5GHZ)
172 *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_OFDM |
173 IEEE80211_CHAN_5GHZ);
9deb1ae5
BR		 174 else if (rate->flags & IEEE80211_RATE_ERP_G)
175 *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_OFDM |
176 IEEE80211_CHAN_2GHZ);
601ae7f2 177 else
9deb1ae5 178 *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_CCK |
601ae7f2
BR		 179 IEEE80211_CHAN_2GHZ);
180 pos += 2;
181
182 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
183 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
184 *pos = status->signal;
185 rthdr->it_present |=
186 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
187 pos++;
188 }
189
190 /* IEEE80211_RADIOTAP_DBM_ANTNOISE */
191 if (local->hw.flags & IEEE80211_HW_NOISE_DBM) {
192 *pos = status->noise;
193 rthdr->it_present |=
194 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTNOISE);
195 pos++;
196 }
197
198 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
199
200 /* IEEE80211_RADIOTAP_ANTENNA */
201 *pos = status->antenna;
202 pos++;
203
601ae7f2
BR		 204 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
205
206 /* IEEE80211_RADIOTAP_RX_FLAGS */
207 /* ensure 2 byte alignment for the 2 byte field as required */
208 if ((pos - (unsigned char *)rthdr) & 1)
209 pos++;
aae89831
JB		 210 if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
211 *(__le16 *)pos |= cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADPLCP);
601ae7f2
BR		 212 pos += 2;
213}
214
b2e7771e
JB		 215/*
216 * This function copies a received frame to all monitor interfaces and
217 * returns a cleaned-up SKB that no longer includes the FCS nor the
218 * radiotap header the driver might have added.
219 */
220static struct sk_buff *
221ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
8318d78a 222 struct ieee80211_rate *rate)
b2e7771e 223{
f1d58c25 224 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb);
b2e7771e 225 struct ieee80211_sub_if_data *sdata;
b2e7771e 226 int needed_headroom = 0;
b2e7771e
JB		 227 struct sk_buff *skb, *skb2;
228 struct net_device *prev_dev = NULL;
229 int present_fcs_len = 0;
230 int rtap_len = 0;
231
232 /*
233 * First, we may need to make a copy of the skb because
234 * (1) we need to modify it for radiotap (if not present), and
235 * (2) the other RX handlers will modify the skb we got.
236 *
237 * We don't need to, of course, if we aren't going to return
238 * the SKB because it has a bad FCS/PLCP checksum.
239 */
240 if (status->flag & RX_FLAG_RADIOTAP)
241 rtap_len = ieee80211_get_radiotap_len(origskb->data);
242 else
601ae7f2
BR		 243 /* room for the radiotap header based on driver features */
244 needed_headroom = ieee80211_rx_radiotap_len(local, status);
b2e7771e
JB		 245
246 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
247 present_fcs_len = FCS_LEN;
248
249 if (!local->monitors) {
f1d58c25 250 if (should_drop_frame(origskb, present_fcs_len, rtap_len)) {
b2e7771e
JB		 251 dev_kfree_skb(origskb);
252 return NULL;
253 }
254
255 return remove_monitor_info(local, origskb, rtap_len);
256 }
257
f1d58c25 258 if (should_drop_frame(origskb, present_fcs_len, rtap_len)) {
b2e7771e
JB		 259 /* only need to expand headroom if necessary */
260 skb = origskb;
261 origskb = NULL;
262
263 /*
264 * This shouldn't trigger often because most devices have an
265 * RX header they pull before we get here, and that should
266 * be big enough for our radiotap information. We should
267 * probably export the length to drivers so that we can have
268 * them allocate enough headroom to start with.
269 */
270 if (skb_headroom(skb) < needed_headroom &&
c49e5ea3 271 pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) {
b2e7771e
JB		 272 dev_kfree_skb(skb);
273 return NULL;
274 }
275 } else {
276 /*
277 * Need to make a copy and possibly remove radiotap header
278 * and FCS from the original.
279 */
280 skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC);
281
282 origskb = remove_monitor_info(local, origskb, rtap_len);
283
284 if (!skb)
285 return origskb;
286 }
287
288 /* if necessary, prepend radiotap information */
601ae7f2 289 if (!(status->flag & RX_FLAG_RADIOTAP))
f1d58c25 290 ieee80211_add_rx_radiotap_header(local, skb, rate,
601ae7f2 291 needed_headroom);
b2e7771e 292
ce3edf6d 293 skb_reset_mac_header(skb);
b2e7771e
JB		 294 skb->ip_summed = CHECKSUM_UNNECESSARY;
295 skb->pkt_type = PACKET_OTHERHOST;
296 skb->protocol = htons(ETH_P_802_2);
297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 if (!netif_running(sdata->dev))
300 continue;
301
05c914fe 302 if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
b2e7771e
JB		 303 continue;
304
3d30d949
MW		 305 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)
306 continue;
307
b2e7771e
JB		 308 if (prev_dev) {
309 skb2 = skb_clone(skb, GFP_ATOMIC);
310 if (skb2) {
311 skb2->dev = prev_dev;
312 netif_rx(skb2);
313 }
314 }
315
316 prev_dev = sdata->dev;
317 sdata->dev->stats.rx_packets++;
318 sdata->dev->stats.rx_bytes += skb->len;
319 }
320
321 if (prev_dev) {
322 skb->dev = prev_dev;
323 netif_rx(skb);
324 } else
325 dev_kfree_skb(skb);
326
327 return origskb;
328}
329
330
5cf121c3 331static void ieee80211_parse_qos(struct ieee80211_rx_data *rx)
6e0d114d 332{
238f74a2 333 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
6e0d114d
JB		 334 int tid;
335
336 /* does the frame have a qos control field? */
238f74a2
HH		 337 if (ieee80211_is_data_qos(hdr->frame_control)) {
338 u8 *qc = ieee80211_get_qos_ctl(hdr);
6e0d114d 339 /* frame has qos control */
238f74a2
HH		 340 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
341 if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)
5cf121c3 342 rx->flags |= IEEE80211_RX_AMSDU;
fd4c7f2f 343 else
5cf121c3 344 rx->flags &= ~IEEE80211_RX_AMSDU;
6e0d114d 345 } else {
1411f9b5
JB		 346 /*
347 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
348 *
349 * Sequence numbers for management frames, QoS data
350 * frames with a broadcast/multicast address in the
351 * Address 1 field, and all non-QoS data frames sent
352 * by QoS STAs are assigned using an additional single
353 * modulo-4096 counter, [...]
354 *
355 * We also use that counter for non-QoS STAs.
356 */
357 tid = NUM_RX_DATA_QUEUES - 1;
6e0d114d 358 }
52865dfd 359
5cf121c3 360 rx->queue = tid;
6e0d114d
JB		 361 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
362 * For now, set skb->priority to 0 for other cases. */
363 rx->skb->priority = (tid > 7) ? 0 : tid;
38f3714d 364}
6e0d114d 365
d1c3a37c
JB		 366/**
367 * DOC: Packet alignment
368 *
369 * Drivers always need to pass packets that are aligned to two-byte boundaries
370 * to the stack.
371 *
372 * Additionally, should, if possible, align the payload data in a way that
373 * guarantees that the contained IP header is aligned to a four-byte
374 * boundary. In the case of regular frames, this simply means aligning the
375 * payload to a four-byte boundary (because either the IP header is directly
376 * contained, or IV/RFC1042 headers that have a length divisible by four are
377 * in front of it).
378 *
379 * With A-MSDU frames, however, the payload data address must yield two modulo
380 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
381 * push the IP header further back to a multiple of four again. Thankfully, the
382 * specs were sane enough this time around to require padding each A-MSDU
383 * subframe to a length that is a multiple of four.
384 *
385 * Padding like Atheros hardware adds which is inbetween the 802.11 header and
386 * the payload is not supported, the driver is required to move the 802.11
387 * header to be directly in front of the payload in that case.
388 */
389static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx)
38f3714d 390{
a7767f95 391 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
38f3714d
JB		 392 int hdrlen;
393
d1c3a37c
JB		 394#ifndef CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT
395 return;
396#endif
397
398 if (WARN_ONCE((unsigned long)rx->skb->data & 1,
399 "unaligned packet at 0x%p\n", rx->skb->data))
400 return;
401
a7767f95 402 if (!ieee80211_is_data_present(hdr->frame_control))
38f3714d
JB		 403 return;
404
a7767f95 405 hdrlen = ieee80211_hdrlen(hdr->frame_control);
5cf121c3 406 if (rx->flags & IEEE80211_RX_AMSDU)
38f3714d 407 hdrlen += ETH_HLEN;
d1c3a37c
JB		 408 WARN_ONCE(((unsigned long)(rx->skb->data + hdrlen)) & 3,
409 "unaligned IP payload at 0x%p\n", rx->skb->data + hdrlen);
6e0d114d
JB		 410}
411
6368e4b1 412
571ecf67
JB		 413/* rx handlers */
414
49461622 415static ieee80211_rx_result debug_noinline
5cf121c3 416ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx)
571ecf67
JB		 417{
418 struct ieee80211_local *local = rx->local;
419 struct sk_buff *skb = rx->skb;
420
fbe9c429 421 if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning)))
f1d58c25 422 return ieee80211_scan_rx(rx->sdata, skb);
ece8eddd 423
142b9f50
HS		 424 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning) &&
425 (rx->flags & IEEE80211_RX_IN_SCAN))) {
ece8eddd 426 /* drop all the other packets during a software scan anyway */
f1d58c25 427 if (ieee80211_scan_rx(rx->sdata, skb) != RX_QUEUED)
ece8eddd 428 dev_kfree_skb(skb);
9ae54c84 429 return RX_QUEUED;
571ecf67
JB		 430 }
431
5cf121c3 432 if (unlikely(rx->flags & IEEE80211_RX_IN_SCAN)) {
571ecf67
JB		 433 /* scanning finished during invoking of handlers */
434 I802_DEBUG_INC(local->rx_handlers_drop_passive_scan);
e4c26add 435 return RX_DROP_UNUSABLE;
571ecf67
JB		 436 }
437
9ae54c84 438 return RX_CONTINUE;
571ecf67
JB		 439}
440
3cfcf6ac
JM		 441
442static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb)
443{
444 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
445
446 if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1))
447 return 0;
448
449 return ieee80211_is_robust_mgmt_frame(hdr);
450}
451
452
453static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb)
454{
455 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
456
457 if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1))
458 return 0;
459
460 return ieee80211_is_robust_mgmt_frame(hdr);
461}
462
463
464/* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
465static int ieee80211_get_mmie_keyidx(struct sk_buff *skb)
466{
467 struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data;
468 struct ieee80211_mmie *mmie;
469
470 if (skb->len < 24 + sizeof(*mmie) ||
471 !is_multicast_ether_addr(hdr->da))
472 return -1;
473
474 if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr))
475 return -1; /* not a robust management frame */
476
477 mmie = (struct ieee80211_mmie *)
478 (skb->data + skb->len - sizeof(*mmie));
479 if (mmie->element_id != WLAN_EID_MMIE ||
480 mmie->length != sizeof(*mmie) - 2)
481 return -1;
482
483 return le16_to_cpu(mmie->key_id);
484}
485
486
33b64eb2 487static ieee80211_rx_result
5cf121c3 488ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
33b64eb2 489{
a7767f95
HH		 490 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
491 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
3c5772a5 492 char *dev_addr = rx->dev->dev_addr;
d6d1a5a7 493
a7767f95 494 if (ieee80211_is_data(hdr->frame_control)) {
3c5772a5
JC		 495 if (is_multicast_ether_addr(hdr->addr1)) {
496 if (ieee80211_has_tods(hdr->frame_control) ||
497 !ieee80211_has_fromds(hdr->frame_control))
498 return RX_DROP_MONITOR;
499 if (memcmp(hdr->addr3, dev_addr, ETH_ALEN) == 0)
500 return RX_DROP_MONITOR;
501 } else {
502 if (!ieee80211_has_a4(hdr->frame_control))
503 return RX_DROP_MONITOR;
504 if (memcmp(hdr->addr4, dev_addr, ETH_ALEN) == 0)
505 return RX_DROP_MONITOR;
506 }
33b64eb2
LCC		 507 }
508
509 /* If there is not an established peer link and this is not a peer link
510 * establisment frame, beacon or probe, drop the frame.
511 */
512
b4e08ea1 513 if (!rx->sta || sta_plink_state(rx->sta) != PLINK_ESTAB) {
33b64eb2 514 struct ieee80211_mgmt *mgmt;
d6d1a5a7 515
a7767f95 516 if (!ieee80211_is_mgmt(hdr->frame_control))
33b64eb2
LCC		 517 return RX_DROP_MONITOR;
518
a7767f95 519 if (ieee80211_is_action(hdr->frame_control)) {
33b64eb2
LCC		 520 mgmt = (struct ieee80211_mgmt *)hdr;
521 if (mgmt->u.action.category != PLINK_CATEGORY)
522 return RX_DROP_MONITOR;
33b64eb2 523 return RX_CONTINUE;
33b64eb2
LCC		 524 }
525
a7767f95
HH		 526 if (ieee80211_is_probe_req(hdr->frame_control) ||
527 ieee80211_is_probe_resp(hdr->frame_control) ||
528 ieee80211_is_beacon(hdr->frame_control))
529 return RX_CONTINUE;
530
531 return RX_DROP_MONITOR;
532
533 }
534
535#define msh_h_get(h, l) ((struct ieee80211s_hdr *) ((u8 *)h + l))
536
537 if (ieee80211_is_data(hdr->frame_control) &&
538 is_multicast_ether_addr(hdr->addr1) &&
3c5772a5 539 mesh_rmc_check(hdr->addr3, msh_h_get(hdr, hdrlen), rx->sdata))
33b64eb2 540 return RX_DROP_MONITOR;
902acc78 541#undef msh_h_get
d6d1a5a7 542
902acc78
JB		 543 return RX_CONTINUE;
544}
33b64eb2
LCC		 545
546
49461622 547static ieee80211_rx_result debug_noinline
5cf121c3 548ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
571ecf67 549{
a7767f95 550 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
571ecf67
JB		 551
552 /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
553 if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
a7767f95 554 if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
5cf121c3 555 rx->sta->last_seq_ctrl[rx->queue] ==
571ecf67 556 hdr->seq_ctrl)) {
5cf121c3 557 if (rx->flags & IEEE80211_RX_RA_MATCH) {
571ecf67
JB		 558 rx->local->dot11FrameDuplicateCount++;
559 rx->sta->num_duplicates++;
560 }
e4c26add 561 return RX_DROP_MONITOR;
571ecf67 562 } else
5cf121c3 563 rx->sta->last_seq_ctrl[rx->queue] = hdr->seq_ctrl;
571ecf67
JB		 564 }
565
571ecf67
JB		 566 if (unlikely(rx->skb->len < 16)) {
567 I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
e4c26add 568 return RX_DROP_MONITOR;
571ecf67
JB		 569 }
570
571ecf67
JB		 571 /* Drop disallowed frame classes based on STA auth/assoc state;
572 * IEEE 802.11, Chap 5.5.
573 *
ccd7b362
JB		 574 * mac80211 filters only based on association state, i.e. it drops
575 * Class 3 frames from not associated stations. hostapd sends
571ecf67
JB		 576 * deauth/disassoc frames when needed. In addition, hostapd is
577 * responsible for filtering on both auth and assoc states.
578 */
33b64eb2 579
902acc78 580 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
33b64eb2 581 return ieee80211_rx_mesh_check(rx);
33b64eb2 582
a7767f95
HH		 583 if (unlikely((ieee80211_is_data(hdr->frame_control) ||
584 ieee80211_is_pspoll(hdr->frame_control)) &&
05c914fe 585 rx->sdata->vif.type != NL80211_IFTYPE_ADHOC &&
07346f81 586 (!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) {
a7767f95
HH		 587 if ((!ieee80211_has_fromds(hdr->frame_control) &&
588 !ieee80211_has_tods(hdr->frame_control) &&
589 ieee80211_is_data(hdr->frame_control)) ||
590 !(rx->flags & IEEE80211_RX_RA_MATCH)) {
571ecf67
JB		 591 /* Drop IBSS frames and frames for other hosts
592 * silently. */
e4c26add 593 return RX_DROP_MONITOR;
571ecf67
JB		 594 }
595
e4c26add 596 return RX_DROP_MONITOR;
571ecf67
JB		 597 }
598
9ae54c84 599 return RX_CONTINUE;
570bd537
JB		 600}
601
602
49461622 603static ieee80211_rx_result debug_noinline
5cf121c3 604ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
570bd537 605{
a7767f95 606 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
3017b80b
JB		 607 int keyidx;
608 int hdrlen;
e4c26add 609 ieee80211_rx_result result = RX_DROP_UNUSABLE;
d4e46a3d 610 struct ieee80211_key *stakey = NULL;
3cfcf6ac 611 int mmie_keyidx = -1;
570bd537 612
3017b80b
JB		 613 /*
614 * Key selection 101
615 *
3cfcf6ac 616 * There are four types of keys:
3017b80b 617 * - GTK (group keys)
3cfcf6ac 618 * - IGTK (group keys for management frames)
3017b80b
JB		 619 * - PTK (pairwise keys)
620 * - STK (station-to-station pairwise keys)
621 *
622 * When selecting a key, we have to distinguish between multicast
623 * (including broadcast) and unicast frames, the latter can only
3cfcf6ac
JM		 624 * use PTKs and STKs while the former always use GTKs and IGTKs.
625 * Unless, of course, actual WEP keys ("pre-RSNA") are used, then
626 * unicast frames can also use key indices like GTKs. Hence, if we
627 * don't have a PTK/STK we check the key index for a WEP key.
3017b80b 628 *
8dc06a1c
JB		 629 * Note that in a regular BSS, multicast frames are sent by the
630 * AP only, associated stations unicast the frame to the AP first
631 * which then multicasts it on their behalf.
632 *
3017b80b
JB		 633 * There is also a slight problem in IBSS mode: GTKs are negotiated
634 * with each station, that is something we don't currently handle.
8dc06a1c
JB		 635 * The spec seems to expect that one negotiates the same key with
636 * every station but there's no such requirement; VLANs could be
637 * possible.
3017b80b
JB		 638 */
639
3017b80b 640 /*
1990af8d 641 * No point in finding a key and decrypting if the frame is neither
3017b80b
JB		 642 * addressed to us nor a multicast frame.
643 */
5cf121c3 644 if (!(rx->flags & IEEE80211_RX_RA_MATCH))
9ae54c84 645 return RX_CONTINUE;
3017b80b 646
d4e46a3d
JB		 647 if (rx->sta)
648 stakey = rcu_dereference(rx->sta->key);
649
0c7c10c7
JM		 650 if (!ieee80211_has_protected(hdr->frame_control))
651 mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb);
652
d4e46a3d
JB		 653 if (!is_multicast_ether_addr(hdr->addr1) && stakey) {
654 rx->key = stakey;
0c7c10c7
JM		 655 /* Skip decryption if the frame is not protected. */
656 if (!ieee80211_has_protected(hdr->frame_control))
657 return RX_CONTINUE;
3cfcf6ac
JM		 658 } else if (mmie_keyidx >= 0) {
659 /* Broadcast/multicast robust management frame / BIP */
660 if ((rx->status->flag & RX_FLAG_DECRYPTED) &&
661 (rx->status->flag & RX_FLAG_IV_STRIPPED))
662 return RX_CONTINUE;
663
664 if (mmie_keyidx < NUM_DEFAULT_KEYS ||
665 mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
666 return RX_DROP_MONITOR; /* unexpected BIP keyidx */
667 rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]);
0c7c10c7
JM		 668 } else if (!ieee80211_has_protected(hdr->frame_control)) {
669 /*
670 * The frame was not protected, so skip decryption. However, we
671 * need to set rx->key if there is a key that could have been
672 * used so that the frame may be dropped if encryption would
673 * have been expected.
674 */
675 struct ieee80211_key *key = NULL;
676 if (ieee80211_is_mgmt(hdr->frame_control) &&
677 is_multicast_ether_addr(hdr->addr1) &&
678 (key = rcu_dereference(rx->sdata->default_mgmt_key)))
679 rx->key = key;
680 else if ((key = rcu_dereference(rx->sdata->default_key)))
681 rx->key = key;
682 return RX_CONTINUE;
571ecf67 683 } else {
3017b80b
JB		 684 /*
685 * The device doesn't give us the IV so we won't be
686 * able to look up the key. That's ok though, we
687 * don't need to decrypt the frame, we just won't
688 * be able to keep statistics accurate.
689 * Except for key threshold notifications, should
690 * we somehow allow the driver to tell us which key
691 * the hardware used if this flag is set?
692 */
5cf121c3
JB		 693 if ((rx->status->flag & RX_FLAG_DECRYPTED) &&
694 (rx->status->flag & RX_FLAG_IV_STRIPPED))
9ae54c84 695 return RX_CONTINUE;
3017b80b 696
a7767f95 697 hdrlen = ieee80211_hdrlen(hdr->frame_control);
3017b80b
JB		 698
699 if (rx->skb->len < 8 + hdrlen)
e4c26add 700 return RX_DROP_UNUSABLE; /* TODO: count this? */
3017b80b
JB		 701
702 /*
703 * no need to call ieee80211_wep_get_keyidx,
704 * it verifies a bunch of things we've done already
705 */
706 keyidx = rx->skb->data[hdrlen + 3] >> 6;
707
d4e46a3d 708 rx->key = rcu_dereference(rx->sdata->keys[keyidx]);
3017b80b
JB		 709
710 /*
711 * RSNA-protected unicast frames should always be sent with
712 * pairwise or station-to-station keys, but for WEP we allow
713 * using a key index as well.
714 */
8f20fc24 715 if (rx->key && rx->key->conf.alg != ALG_WEP &&
3017b80b
JB		 716 !is_multicast_ether_addr(hdr->addr1))
717 rx->key = NULL;
571ecf67
JB		 718 }
719
3017b80b 720 if (rx->key) {
571ecf67 721 rx->key->tx_rx_count++;
011bfcc4 722 /* TODO: add threshold stuff again */
1990af8d 723 } else {
e4c26add 724 return RX_DROP_MONITOR;
70f08765
JB		 725 }
726
1990af8d
JB		 727 /* Check for weak IVs if possible */
728 if (rx->sta && rx->key->conf.alg == ALG_WEP &&
a7767f95 729 ieee80211_is_data(hdr->frame_control) &&
5cf121c3
JB		 730 (!(rx->status->flag & RX_FLAG_IV_STRIPPED) ||
731 !(rx->status->flag & RX_FLAG_DECRYPTED)) &&
1990af8d
JB		 732 ieee80211_wep_is_weak_iv(rx->skb, rx->key))
733 rx->sta->wep_weak_iv_count++;
734
70f08765
JB		 735 switch (rx->key->conf.alg) {
736 case ALG_WEP:
e2f036da
MN		 737 result = ieee80211_crypto_wep_decrypt(rx);
738 break;
70f08765 739 case ALG_TKIP:
e2f036da
MN		 740 result = ieee80211_crypto_tkip_decrypt(rx);
741 break;
70f08765 742 case ALG_CCMP:
e2f036da
MN		 743 result = ieee80211_crypto_ccmp_decrypt(rx);
744 break;
3cfcf6ac
JM		 745 case ALG_AES_CMAC:
746 result = ieee80211_crypto_aes_cmac_decrypt(rx);
747 break;
70f08765
JB		 748 }
749
e2f036da 750 /* either the frame has been decrypted or will be dropped */
5cf121c3 751 rx->status->flag |= RX_FLAG_DECRYPTED;
e2f036da
MN		 752
753 return result;
70f08765
JB		 754}
755
572e0012
KV		 756static ieee80211_rx_result debug_noinline
757ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx)
758{
759 struct ieee80211_local *local;
760 struct ieee80211_hdr *hdr;
761 struct sk_buff *skb;
762
763 local = rx->local;
764 skb = rx->skb;
765 hdr = (struct ieee80211_hdr *) skb->data;
766
767 if (!local->pspolling)
768 return RX_CONTINUE;
769
770 if (!ieee80211_has_fromds(hdr->frame_control))
771 /* this is not from AP */
772 return RX_CONTINUE;
773
774 if (!ieee80211_is_data(hdr->frame_control))
775 return RX_CONTINUE;
776
777 if (!ieee80211_has_moredata(hdr->frame_control)) {
778 /* AP has no more frames buffered for us */
779 local->pspolling = false;
780 return RX_CONTINUE;
781 }
782
783 /* more data bit is set, let's request a new frame from the AP */
784 ieee80211_send_pspoll(local, rx->sdata);
785
786 return RX_CONTINUE;
787}
788
133b8226 789static void ap_sta_ps_start(struct sta_info *sta)
571ecf67 790{
133b8226 791 struct ieee80211_sub_if_data *sdata = sta->sdata;
4571d3bf 792 struct ieee80211_local *local = sdata->local;
0795af57 793
3e122be0 794 atomic_inc(&sdata->bss->num_sta_ps);
3fa52056 795 set_sta_flags(sta, WLAN_STA_PS);
24487981 796 drv_sta_notify(local, &sdata->vif, STA_NOTIFY_SLEEP, &sta->sta);
571ecf67 797#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
0c68ae26
JB		 798 printk(KERN_DEBUG "%s: STA %pM aid %d enters power save mode\n",
799 sdata->dev->name, sta->sta.addr, sta->sta.aid);
571ecf67
JB		 800#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
801}
802
133b8226 803static int ap_sta_ps_end(struct sta_info *sta)
571ecf67 804{
133b8226
JB		 805 struct ieee80211_sub_if_data *sdata = sta->sdata;
806 struct ieee80211_local *local = sdata->local;
8f77f384 807 int sent, buffered;
571ecf67 808
3e122be0 809 atomic_dec(&sdata->bss->num_sta_ps);
004c872e 810
3fa52056 811 clear_sta_flags(sta, WLAN_STA_PS);
24487981 812 drv_sta_notify(local, &sdata->vif, STA_NOTIFY_AWAKE, &sta->sta);
004c872e
JB		 813
814 if (!skb_queue_empty(&sta->ps_tx_buf))
815 sta_info_clear_tim_bit(sta);
816
571ecf67 817#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
0c68ae26
JB		 818 printk(KERN_DEBUG "%s: STA %pM aid %d exits power save mode\n",
819 sdata->dev->name, sta->sta.addr, sta->sta.aid);
571ecf67 820#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
004c872e 821
571ecf67 822 /* Send all buffered frames to the station */
8f77f384
JB		 823 sent = ieee80211_add_pending_skbs(local, &sta->tx_filtered);
824 buffered = ieee80211_add_pending_skbs(local, &sta->ps_tx_buf);
825 sent += buffered;
826 local->total_ps_buffered -= buffered;
827
571ecf67 828#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
8f77f384
JB		 829 printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames "
830 "since STA not sleeping anymore\n", sdata->dev->name,
831 sta->sta.addr, sta->sta.aid, sent - buffered, buffered);
571ecf67 832#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
571ecf67
JB		 833
834 return sent;
835}
836
49461622 837static ieee80211_rx_result debug_noinline
5cf121c3 838ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
571ecf67
JB		 839{
840 struct sta_info *sta = rx->sta;
a7767f95 841 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
571ecf67
JB		 842
843 if (!sta)
9ae54c84 844 return RX_CONTINUE;
571ecf67 845
b291ba11
JB		 846 /*
847 * Update last_rx only for IBSS packets which are for the current
848 * BSSID to avoid keeping the current IBSS network alive in cases
849 * where other STAs start using different BSSID.
850 */
05c914fe 851 if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) {
71364716 852 u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len,
05c914fe 853 NL80211_IFTYPE_ADHOC);
46900298 854 if (compare_ether_addr(bssid, rx->sdata->u.ibss.bssid) == 0)
571ecf67 855 sta->last_rx = jiffies;
b291ba11
JB		 856 } else if (!is_multicast_ether_addr(hdr->addr1)) {
857 /*
33b64eb2
LCC		 858 * Mesh beacons will update last_rx when if they are found to
859 * match the current local configuration when processed.
571ecf67 860 */
b291ba11 861 sta->last_rx = jiffies;
571ecf67
JB		 862 }
863
5cf121c3 864 if (!(rx->flags & IEEE80211_RX_RA_MATCH))
9ae54c84 865 return RX_CONTINUE;
571ecf67 866
3cf335d5
KV		 867 if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
868 ieee80211_sta_rx_notify(rx->sdata, hdr);
869
571ecf67
JB		 870 sta->rx_fragments++;
871 sta->rx_bytes += rx->skb->len;
5cf121c3 872 sta->last_signal = rx->status->signal;
566bfe5a 873 sta->last_qual = rx->status->qual;
5cf121c3 874 sta->last_noise = rx->status->noise;
571ecf67 875
72eaa43a
JB		 876 /*
877 * Change STA power saving mode only at the end of a frame
878 * exchange sequence.
879 */
3e122be0 880 if (!ieee80211_has_morefrags(hdr->frame_control) &&
05c914fe
JB		 881 (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
882 rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) {
72eaa43a
JB		 883 if (test_sta_flags(sta, WLAN_STA_PS)) {
884 /*
885 * Ignore doze->wake transitions that are
886 * indicated by non-data frames, the standard
887 * is unclear here, but for example going to
888 * PS mode and then scanning would cause a
889 * doze->wake transition for the probe request,
890 * and that is clearly undesirable.
891 */
892 if (ieee80211_is_data(hdr->frame_control) &&
893 !ieee80211_has_pm(hdr->frame_control))
894 rx->sent_ps_buffered += ap_sta_ps_end(sta);
895 } else {
896 if (ieee80211_has_pm(hdr->frame_control))
897 ap_sta_ps_start(sta);
898 }
571ecf67
JB		 899 }
900
901 /* Drop data::nullfunc frames silently, since they are used only to
902 * control station power saving mode. */
a7767f95 903 if (ieee80211_is_nullfunc(hdr->frame_control)) {
571ecf67
JB		 904 I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
905 /* Update counter and free packet here to avoid counting this
906 * as a dropped packed. */
907 sta->rx_packets++;
908 dev_kfree_skb(rx->skb);
9ae54c84 909 return RX_QUEUED;
571ecf67
JB		 910 }
911
9ae54c84 912 return RX_CONTINUE;
571ecf67
JB		 913} /* ieee80211_rx_h_sta_process */
914
571ecf67
JB		 915static inline struct ieee80211_fragment_entry *
916ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
917 unsigned int frag, unsigned int seq, int rx_queue,
918 struct sk_buff **skb)
919{
920 struct ieee80211_fragment_entry *entry;
921 int idx;
922
923 idx = sdata->fragment_next;
924 entry = &sdata->fragments[sdata->fragment_next++];
925 if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
926 sdata->fragment_next = 0;
927
928 if (!skb_queue_empty(&entry->skb_list)) {
f4ea83dd 929#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
571ecf67
JB		 930 struct ieee80211_hdr *hdr =
931 (struct ieee80211_hdr *) entry->skb_list.next->data;
932 printk(KERN_DEBUG "%s: RX reassembly removed oldest "
933 "fragment entry (idx=%d age=%lu seq=%d last_frag=%d "
0c68ae26 934 "addr1=%pM addr2=%pM\n",
571ecf67
JB		 935 sdata->dev->name, idx,
936 jiffies - entry->first_frag_time, entry->seq,
0c68ae26 937 entry->last_frag, hdr->addr1, hdr->addr2);
f4ea83dd 938#endif
571ecf67
JB		 939 __skb_queue_purge(&entry->skb_list);
940 }
941
942 __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
943 *skb = NULL;
944 entry->first_frag_time = jiffies;
945 entry->seq = seq;
946 entry->rx_queue = rx_queue;
947 entry->last_frag = frag;
948 entry->ccmp = 0;
949 entry->extra_len = 0;
950
951 return entry;
952}
953
954static inline struct ieee80211_fragment_entry *
955ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
b73d70ad 956 unsigned int frag, unsigned int seq,
571ecf67
JB		 957 int rx_queue, struct ieee80211_hdr *hdr)
958{
959 struct ieee80211_fragment_entry *entry;
960 int i, idx;
961
962 idx = sdata->fragment_next;
963 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
964 struct ieee80211_hdr *f_hdr;
571ecf67
JB		 965
966 idx--;
967 if (idx < 0)
968 idx = IEEE80211_FRAGMENT_MAX - 1;
969
970 entry = &sdata->fragments[idx];
971 if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
972 entry->rx_queue != rx_queue ||
973 entry->last_frag + 1 != frag)
974 continue;
975
b73d70ad 976 f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data;
571ecf67 977
b73d70ad
HH		 978 /*
979 * Check ftype and addresses are equal, else check next fragment
980 */
981 if (((hdr->frame_control ^ f_hdr->frame_control) &
982 cpu_to_le16(IEEE80211_FCTL_FTYPE)) ||
571ecf67
JB		 983 compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 ||
984 compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0)
985 continue;
986
ab46623e 987 if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
571ecf67
JB		 988 __skb_queue_purge(&entry->skb_list);
989 continue;
990 }
991 return entry;
992 }
993
994 return NULL;
995}
996
49461622 997static ieee80211_rx_result debug_noinline
5cf121c3 998ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
571ecf67
JB		 999{
1000 struct ieee80211_hdr *hdr;
1001 u16 sc;
358c8d9d 1002 __le16 fc;
571ecf67
JB		 1003 unsigned int frag, seq;
1004 struct ieee80211_fragment_entry *entry;
1005 struct sk_buff *skb;
1006
b73d70ad 1007 hdr = (struct ieee80211_hdr *)rx->skb->data;
358c8d9d 1008 fc = hdr->frame_control;
571ecf67
JB		 1009 sc = le16_to_cpu(hdr->seq_ctrl);
1010 frag = sc & IEEE80211_SCTL_FRAG;
1011
358c8d9d 1012 if (likely((!ieee80211_has_morefrags(fc) && frag == 0) ||
571ecf67
JB		 1013 (rx->skb)->len < 24 ||
1014 is_multicast_ether_addr(hdr->addr1))) {
1015 /* not fragmented */
1016 goto out;
1017 }
1018 I802_DEBUG_INC(rx->local->rx_handlers_fragments);
1019
1020 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
1021
1022 if (frag == 0) {
1023 /* This is the first fragment of a new frame. */
1024 entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
5cf121c3 1025 rx->queue, &(rx->skb));
8f20fc24 1026 if (rx->key && rx->key->conf.alg == ALG_CCMP &&
358c8d9d 1027 ieee80211_has_protected(fc)) {
571ecf67
JB		 1028 /* Store CCMP PN so that we can verify that the next
1029 * fragment has a sequential PN value. */
1030 entry->ccmp = 1;
1031 memcpy(entry->last_pn,
5cf121c3 1032 rx->key->u.ccmp.rx_pn[rx->queue],
571ecf67
JB		 1033 CCMP_PN_LEN);
1034 }
9ae54c84 1035 return RX_QUEUED;
571ecf67
JB		 1036 }
1037
1038 /* This is a fragment for a frame that should already be pending in
1039 * fragment cache. Add this fragment to the end of the pending entry.
1040 */
b73d70ad 1041 entry = ieee80211_reassemble_find(rx->sdata, frag, seq, rx->queue, hdr);
571ecf67
JB		 1042 if (!entry) {
1043 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
e4c26add 1044 return RX_DROP_MONITOR;
571ecf67
JB		 1045 }
1046
1047 /* Verify that MPDUs within one MSDU have sequential PN values.
1048 * (IEEE 802.11i, 8.3.3.4.5) */
1049 if (entry->ccmp) {
1050 int i;
1051 u8 pn[CCMP_PN_LEN], *rpn;
8f20fc24 1052 if (!rx->key || rx->key->conf.alg != ALG_CCMP)
e4c26add 1053 return RX_DROP_UNUSABLE;
571ecf67
JB		 1054 memcpy(pn, entry->last_pn, CCMP_PN_LEN);
1055 for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
1056 pn[i]++;
1057 if (pn[i])
1058 break;
1059 }
5cf121c3 1060 rpn = rx->key->u.ccmp.rx_pn[rx->queue];
f4ea83dd 1061 if (memcmp(pn, rpn, CCMP_PN_LEN))
e4c26add 1062 return RX_DROP_UNUSABLE;
571ecf67
JB		 1063 memcpy(entry->last_pn, pn, CCMP_PN_LEN);
1064 }
1065
358c8d9d 1066 skb_pull(rx->skb, ieee80211_hdrlen(fc));
571ecf67
JB		 1067 __skb_queue_tail(&entry->skb_list, rx->skb);
1068 entry->last_frag = frag;
1069 entry->extra_len += rx->skb->len;
358c8d9d 1070 if (ieee80211_has_morefrags(fc)) {
571ecf67 1071 rx->skb = NULL;
9ae54c84 1072 return RX_QUEUED;
571ecf67
JB		 1073 }
1074
1075 rx->skb = __skb_dequeue(&entry->skb_list);
1076 if (skb_tailroom(rx->skb) < entry->extra_len) {
1077 I802_DEBUG_INC(rx->local->rx_expand_skb_head2);
1078 if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
1079 GFP_ATOMIC))) {
1080 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
1081 __skb_queue_purge(&entry->skb_list);
e4c26add 1082 return RX_DROP_UNUSABLE;
571ecf67
JB		 1083 }
1084 }
1085 while ((skb = __skb_dequeue(&entry->skb_list))) {
1086 memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len);
1087 dev_kfree_skb(skb);
1088 }
1089
1090 /* Complete frame has been reassembled - process it now */
5cf121c3 1091 rx->flags |= IEEE80211_RX_FRAGMENTED;
571ecf67
JB		 1092
1093 out:
1094 if (rx->sta)
1095 rx->sta->rx_packets++;
1096 if (is_multicast_ether_addr(hdr->addr1))
1097 rx->local->dot11MulticastReceivedFrameCount++;
1098 else
1099 ieee80211_led_rx(rx->local);
9ae54c84 1100 return RX_CONTINUE;
571ecf67
JB		 1101}
1102
49461622 1103static ieee80211_rx_result debug_noinline
5cf121c3 1104ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx)
571ecf67 1105{
98f0b0a3 1106 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
571ecf67
JB		 1107 struct sk_buff *skb;
1108 int no_pending_pkts;
358c8d9d 1109 __le16 fc = ((struct ieee80211_hdr *)rx->skb->data)->frame_control;
571ecf67 1110
358c8d9d 1111 if (likely(!rx->sta || !ieee80211_is_pspoll(fc) ||
5cf121c3 1112 !(rx->flags & IEEE80211_RX_RA_MATCH)))
9ae54c84 1113 return RX_CONTINUE;
571ecf67 1114
05c914fe
JB		 1115 if ((sdata->vif.type != NL80211_IFTYPE_AP) &&
1116 (sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
e4c26add 1117 return RX_DROP_UNUSABLE;
98f0b0a3 1118
571ecf67
JB		 1119 skb = skb_dequeue(&rx->sta->tx_filtered);
1120 if (!skb) {
1121 skb = skb_dequeue(&rx->sta->ps_tx_buf);
1122 if (skb)
1123 rx->local->total_ps_buffered--;
1124 }
1125 no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) &&
1126 skb_queue_empty(&rx->sta->ps_tx_buf);
1127
1128 if (skb) {
3fa52056 1129 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
571ecf67
JB		 1130 struct ieee80211_hdr *hdr =
1131 (struct ieee80211_hdr *) skb->data;
1132
4a9a66e9 1133 /*
3fa52056 1134 * Tell TX path to send this frame even though the STA may
4a9a66e9
JB		 1135 * still remain is PS mode after this frame exchange.
1136 */
3fa52056 1137 info->flags |= IEEE80211_TX_CTL_PSPOLL_RESPONSE;
571ecf67
JB		 1138
1139#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
0c68ae26
JB		 1140 printk(KERN_DEBUG "STA %pM aid %d: PS Poll (entries after %d)\n",
1141 rx->sta->sta.addr, rx->sta->sta.aid,
571ecf67
JB		 1142 skb_queue_len(&rx->sta->ps_tx_buf));
1143#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
1144
1145 /* Use MoreData flag to indicate whether there are more
1146 * buffered frames for this STA */
836341a7 1147 if (no_pending_pkts)
571ecf67 1148 hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
836341a7 1149 else
571ecf67
JB		 1150 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1151
3fa52056 1152 ieee80211_add_pending_skb(rx->local, skb);
571ecf67 1153
004c872e
JB		 1154 if (no_pending_pkts)
1155 sta_info_clear_tim_bit(rx->sta);
571ecf67 1156#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
5cf121c3 1157 } else if (!rx->sent_ps_buffered) {
004c872e
JB		 1158 /*
1159 * FIXME: This can be the result of a race condition between
1160 * us expiring a frame and the station polling for it.
1161 * Should we send it a null-func frame indicating we
1162 * have nothing buffered for it?
1163 */
0c68ae26 1164 printk(KERN_DEBUG "%s: STA %pM sent PS Poll even "
f4ea83dd 1165 "though there are no buffered frames for it\n",
0c68ae26 1166 rx->dev->name, rx->sta->sta.addr);
571ecf67 1167#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
571ecf67
JB		 1168 }
1169
9ae54c84 1170 /* Free PS Poll skb here instead of returning RX_DROP that would
571ecf67
JB		 1171 * count as an dropped frame. */
1172 dev_kfree_skb(rx->skb);
1173
9ae54c84 1174 return RX_QUEUED;
571ecf67
JB		 1175}
1176
49461622 1177static ieee80211_rx_result debug_noinline
5cf121c3 1178ieee80211_rx_h_remove_qos_control(struct ieee80211_rx_data *rx)
6e0d114d 1179{
6e0d114d 1180 u8 *data = rx->skb->data;
238f74a2 1181 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)data;
6e0d114d 1182
238f74a2 1183 if (!ieee80211_is_data_qos(hdr->frame_control))
9ae54c84 1184 return RX_CONTINUE;
6e0d114d
JB		 1185
1186 /* remove the qos control field, update frame type and meta-data */
238f74a2
HH		 1187 memmove(data + IEEE80211_QOS_CTL_LEN, data,
1188 ieee80211_hdrlen(hdr->frame_control) - IEEE80211_QOS_CTL_LEN);
1189 hdr = (struct ieee80211_hdr *)skb_pull(rx->skb, IEEE80211_QOS_CTL_LEN);
6e0d114d 1190 /* change frame type to non QOS */
238f74a2 1191 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
6e0d114d 1192
9ae54c84 1193 return RX_CONTINUE;
6e0d114d
JB		 1194}
1195
76ee65bf 1196static int
5cf121c3 1197ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
571ecf67 1198{
07346f81 1199 if (unlikely(!rx->sta ||
f4ea83dd 1200 !test_sta_flags(rx->sta, WLAN_STA_AUTHORIZED)))
76ee65bf 1201 return -EACCES;
571ecf67 1202
76ee65bf 1203 return 0;
571ecf67
JB		 1204}
1205
76ee65bf 1206static int
358c8d9d 1207ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
571ecf67 1208{
3017b80b 1209 /*
7848ba7d
JB		 1210 * Pass through unencrypted frames if the hardware has
1211 * decrypted them already.
3017b80b 1212 */
5cf121c3 1213 if (rx->status->flag & RX_FLAG_DECRYPTED)
76ee65bf 1214 return 0;
571ecf67
JB		 1215
1216 /* Drop unencrypted frames if key is set. */
358c8d9d
HH		 1217 if (unlikely(!ieee80211_has_protected(fc) &&
1218 !ieee80211_is_nullfunc(fc) &&
f2ca3ea4 1219 ieee80211_is_data(fc) &&
b3fc9c6c 1220 (rx->key || rx->sdata->drop_unencrypted)))
76ee65bf 1221 return -EACCES;
f2ca3ea4
JM		 1222 if (rx->sta && test_sta_flags(rx->sta, WLAN_STA_MFP)) {
1223 if (unlikely(ieee80211_is_unicast_robust_mgmt_frame(rx->skb) &&
1224 rx->key))
1225 return -EACCES;
1226 /* BIP does not use Protected field, so need to check MMIE */
1227 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb)
1228 && ieee80211_get_mmie_keyidx(rx->skb) < 0 &&
1229 rx->key))
1230 return -EACCES;
1231 /*
1232 * When using MFP, Action frames are not allowed prior to
1233 * having configured keys.
1234 */
1235 if (unlikely(ieee80211_is_action(fc) && !rx->key &&
1236 ieee80211_is_robust_mgmt_frame(
1237 (struct ieee80211_hdr *) rx->skb->data)))
1238 return -EACCES;
1239 }
b3fc9c6c 1240
76ee65bf 1241 return 0;
571ecf67
JB		 1242}
1243
76ee65bf 1244static int
e31a16d6 1245__ieee80211_data_to_8023(struct ieee80211_rx_data *rx)
571ecf67
JB		 1246{
1247 struct net_device *dev = rx->dev;
571ecf67
JB		 1248 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1249
e31a16d6 1250 return ieee80211_data_to_8023(rx->skb, dev->dev_addr, sdata->vif.type);
76ee65bf 1251}
571ecf67 1252
ce3edf6d
JB		 1253/*
1254 * requires that rx->skb is a frame with ethernet header
1255 */
358c8d9d 1256static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
ce3edf6d 1257{
c97c23e3 1258 static const u8 pae_group_addr[ETH_ALEN] __aligned(2)
ce3edf6d
JB		 1259 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
1260 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
1261
1262 /*
1263 * Allow EAPOL frames to us/the PAE group address regardless
1264 * of whether the frame was encrypted or not.
1265 */
1266 if (ehdr->h_proto == htons(ETH_P_PAE) &&
1267 (compare_ether_addr(ehdr->h_dest, rx->dev->dev_addr) == 0 ||
1268 compare_ether_addr(ehdr->h_dest, pae_group_addr) == 0))
1269 return true;
1270
1271 if (ieee80211_802_1x_port_control(rx) ||
358c8d9d 1272 ieee80211_drop_unencrypted(rx, fc))
ce3edf6d
JB		 1273 return false;
1274
1275 return true;
1276}
1277
1278/*
1279 * requires that rx->skb is a frame with ethernet header
1280 */
76ee65bf 1281static void
5cf121c3 1282ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
76ee65bf
RR		 1283{
1284 struct net_device *dev = rx->dev;
1285 struct ieee80211_local *local = rx->local;
1286 struct sk_buff *skb, *xmit_skb;
1287 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
ce3edf6d
JB		 1288 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
1289 struct sta_info *dsta;
571ecf67 1290
76ee65bf
RR		 1291 skb = rx->skb;
1292 xmit_skb = NULL;
571ecf67 1293
05c914fe
JB		 1294 if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1295 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
213cd118 1296 !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
5cf121c3 1297 (rx->flags & IEEE80211_RX_RA_MATCH)) {
ce3edf6d
JB		 1298 if (is_multicast_ether_addr(ehdr->h_dest)) {
1299 /*
1300 * send multicast frames both to higher layers in
1301 * local net stack and back to the wireless medium
1302 */
76ee65bf
RR		 1303 xmit_skb = skb_copy(skb, GFP_ATOMIC);
1304 if (!xmit_skb && net_ratelimit())
571ecf67
JB		 1305 printk(KERN_DEBUG "%s: failed to clone "
1306 "multicast frame\n", dev->name);
1307 } else {
571ecf67 1308 dsta = sta_info_get(local, skb->data);
d0709a65 1309 if (dsta && dsta->sdata->dev == dev) {
ce3edf6d
JB		 1310 /*
1311 * The destination station is associated to
1312 * this AP (in this VLAN), so send the frame
1313 * directly to it and do not pass it to local
1314 * net stack.
571ecf67 1315 */
76ee65bf 1316 xmit_skb = skb;
571ecf67
JB		 1317 skb = NULL;
1318 }
571ecf67
JB		 1319 }
1320 }
1321
1322 if (skb) {
d1c3a37c
JB		 1323 int align __maybe_unused;
1324
1325#if defined(CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT) || !defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
1326 /*
1327 * 'align' will only take the values 0 or 2 here
1328 * since all frames are required to be aligned
1329 * to 2-byte boundaries when being passed to
1330 * mac80211. That also explains the __skb_push()
1331 * below.
1332 */
dacb6f1d 1333 align = ((unsigned long)(skb->data + sizeof(struct ethhdr))) & 3;
d1c3a37c
JB		 1334 if (align) {
1335 if (WARN_ON(skb_headroom(skb) < 3)) {
1336 dev_kfree_skb(skb);
1337 skb = NULL;
1338 } else {
1339 u8 *data = skb->data;
1340 size_t len = skb->len;
1341 u8 *new = __skb_push(skb, align);
1342 memmove(new, data, len);
1343 __skb_trim(skb, len);
1344 }
1345 }
1346#endif
1347
1348 if (skb) {
1349 /* deliver to local stack */
1350 skb->protocol = eth_type_trans(skb, dev);
1351 memset(skb->cb, 0, sizeof(skb->cb));
1352 netif_rx(skb);
1353 }
571ecf67
JB		 1354 }
1355
76ee65bf 1356 if (xmit_skb) {
571ecf67 1357 /* send to wireless media */
f831e909 1358 xmit_skb->protocol = htons(ETH_P_802_3);
ce3edf6d
JB		 1359 skb_reset_network_header(xmit_skb);
1360 skb_reset_mac_header(xmit_skb);
76ee65bf 1361 dev_queue_xmit(xmit_skb);
571ecf67 1362 }
76ee65bf
RR		 1363}
1364
49461622 1365static ieee80211_rx_result debug_noinline
5cf121c3 1366ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
fd4c7f2f
RR		 1367{
1368 struct net_device *dev = rx->dev;
1369 struct ieee80211_local *local = rx->local;
358c8d9d 1370 u16 ethertype;
fd4c7f2f
RR		 1371 u8 *payload;
1372 struct sk_buff *skb = rx->skb, *frame = NULL;
358c8d9d
HH		 1373 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1374 __le16 fc = hdr->frame_control;
fd4c7f2f
RR		 1375 const struct ethhdr *eth;
1376 int remaining, err;
1377 u8 dst[ETH_ALEN];
1378 u8 src[ETH_ALEN];
fd4c7f2f 1379
358c8d9d 1380 if (unlikely(!ieee80211_is_data(fc)))
9ae54c84 1381 return RX_CONTINUE;
fd4c7f2f 1382
358c8d9d 1383 if (unlikely(!ieee80211_is_data_present(fc)))
e4c26add 1384 return RX_DROP_MONITOR;
fd4c7f2f 1385
5cf121c3 1386 if (!(rx->flags & IEEE80211_RX_AMSDU))
9ae54c84 1387 return RX_CONTINUE;
fd4c7f2f 1388
e31a16d6 1389 err = __ieee80211_data_to_8023(rx);
fd4c7f2f 1390 if (unlikely(err))
e4c26add 1391 return RX_DROP_UNUSABLE;
fd4c7f2f
RR		 1392
1393 skb->dev = dev;
1394
1395 dev->stats.rx_packets++;
1396 dev->stats.rx_bytes += skb->len;
1397
1398 /* skip the wrapping header */
1399 eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
1400 if (!eth)
e4c26add 1401 return RX_DROP_UNUSABLE;
fd4c7f2f
RR		 1402
1403 while (skb != frame) {
1404 u8 padding;
1405 __be16 len = eth->h_proto;
1406 unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len);
1407
1408 remaining = skb->len;
1409 memcpy(dst, eth->h_dest, ETH_ALEN);
1410 memcpy(src, eth->h_source, ETH_ALEN);
1411
1412 padding = ((4 - subframe_len) & 0x3);
1413 /* the last MSDU has no padding */
f4ea83dd 1414 if (subframe_len > remaining)
e4c26add 1415 return RX_DROP_UNUSABLE;
fd4c7f2f
RR		 1416
1417 skb_pull(skb, sizeof(struct ethhdr));
1418 /* if last subframe reuse skb */
1419 if (remaining <= subframe_len + padding)
1420 frame = skb;
1421 else {
d1c3a37c
JB		 1422 /*
1423 * Allocate and reserve two bytes more for payload
1424 * alignment since sizeof(struct ethhdr) is 14.
1425 */
1426 frame = dev_alloc_skb(
1427 ALIGN(local->hw.extra_tx_headroom, 4) +
1428 subframe_len + 2);
fd4c7f2f
RR		 1429
1430 if (frame == NULL)
e4c26add 1431 return RX_DROP_UNUSABLE;
fd4c7f2f 1432
d1c3a37c
JB		 1433 skb_reserve(frame,
1434 ALIGN(local->hw.extra_tx_headroom, 4) +
1435 sizeof(struct ethhdr) + 2);
fd4c7f2f
RR		 1436 memcpy(skb_put(frame, ntohs(len)), skb->data,
1437 ntohs(len));
1438
1439 eth = (struct ethhdr *) skb_pull(skb, ntohs(len) +
1440 padding);
1441 if (!eth) {
fd4c7f2f 1442 dev_kfree_skb(frame);
e4c26add 1443 return RX_DROP_UNUSABLE;
fd4c7f2f
RR		 1444 }
1445 }
1446
ce3edf6d 1447 skb_reset_network_header(frame);
fd4c7f2f
RR		 1448 frame->dev = dev;
1449 frame->priority = skb->priority;
1450 rx->skb = frame;
1451
fd4c7f2f
RR		 1452 payload = frame->data;
1453 ethertype = (payload[6] << 8) | payload[7];
1454
1455 if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
ce3edf6d
JB		 1456 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1457 compare_ether_addr(payload,
1458 bridge_tunnel_header) == 0)) {
fd4c7f2f
RR		 1459 /* remove RFC1042 or Bridge-Tunnel
1460 * encapsulation and replace EtherType */
1461 skb_pull(frame, 6);
1462 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
1463 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
1464 } else {
ce3edf6d
JB		 1465 memcpy(skb_push(frame, sizeof(__be16)),
1466 &len, sizeof(__be16));
fd4c7f2f
RR		 1467 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
1468 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
1469 }
1470
358c8d9d 1471 if (!ieee80211_frame_allowed(rx, fc)) {
ce3edf6d 1472 if (skb == frame) /* last frame */
e4c26add 1473 return RX_DROP_UNUSABLE;
ce3edf6d
JB		 1474 dev_kfree_skb(frame);
1475 continue;
1476 }
fd4c7f2f
RR		 1477
1478 ieee80211_deliver_skb(rx);
1479 }
1480
9ae54c84 1481 return RX_QUEUED;
fd4c7f2f
RR		 1482}
1483
bf94e17b 1484#ifdef CONFIG_MAC80211_MESH
b0dee578 1485static ieee80211_rx_result
e32f85f7
LCC		 1486ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
1487{
1488 struct ieee80211_hdr *hdr;
1489 struct ieee80211s_hdr *mesh_hdr;
1490 unsigned int hdrlen;
1491 struct sk_buff *skb = rx->skb, *fwd_skb;
3b8d81e0 1492 struct ieee80211_local *local = rx->local;
249b405c 1493 struct ieee80211_sub_if_data *sdata;
e32f85f7
LCC		 1494
1495 hdr = (struct ieee80211_hdr *) skb->data;
1496 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1497 mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
249b405c 1498 sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
e32f85f7
LCC		 1499
1500 if (!ieee80211_is_data(hdr->frame_control))
1501 return RX_CONTINUE;
1502
1503 if (!mesh_hdr->ttl)
1504 /* illegal frame */
1505 return RX_DROP_MONITOR;
1506
43b7b314 1507 if (mesh_hdr->flags & MESH_FLAGS_AE) {
79617dee 1508 struct mesh_path *mppath;
43b7b314
JC		 1509 char *proxied_addr;
1510 char *mpp_addr;
1511
1512 if (is_multicast_ether_addr(hdr->addr1)) {
1513 mpp_addr = hdr->addr3;
1514 proxied_addr = mesh_hdr->eaddr1;
1515 } else {
1516 mpp_addr = hdr->addr4;
1517 proxied_addr = mesh_hdr->eaddr2;
1518 }
79617dee 1519
79617dee 1520 rcu_read_lock();
43b7b314 1521 mppath = mpp_path_lookup(proxied_addr, sdata);
79617dee 1522 if (!mppath) {
43b7b314 1523 mpp_path_add(proxied_addr, mpp_addr, sdata);
79617dee
Y		 1524 } else {
1525 spin_lock_bh(&mppath->state_lock);
1526 mppath->exp_time = jiffies;
43b7b314
JC		 1527 if (compare_ether_addr(mppath->mpp, mpp_addr) != 0)
1528 memcpy(mppath->mpp, mpp_addr, ETH_ALEN);
79617dee
Y		 1529 spin_unlock_bh(&mppath->state_lock);
1530 }
1531 rcu_read_unlock();
1532 }
1533
3c5772a5
JC		 1534 /* Frame has reached destination. Don't forward */
1535 if (!is_multicast_ether_addr(hdr->addr1) &&
1536 compare_ether_addr(rx->dev->dev_addr, hdr->addr3) == 0)
e32f85f7
LCC		 1537 return RX_CONTINUE;
1538
1539 mesh_hdr->ttl--;
1540
1541 if (rx->flags & IEEE80211_RX_RA_MATCH) {
1542 if (!mesh_hdr->ttl)
472dbc45 1543 IEEE80211_IFSTA_MESH_CTR_INC(&rx->sdata->u.mesh,
e32f85f7
LCC		 1544 dropped_frames_ttl);
1545 else {
1546 struct ieee80211_hdr *fwd_hdr;
3b8d81e0
JB		 1547 struct ieee80211_tx_info *info;
1548
e32f85f7
LCC		 1549 fwd_skb = skb_copy(skb, GFP_ATOMIC);
1550
1551 if (!fwd_skb && net_ratelimit())
1552 printk(KERN_DEBUG "%s: failed to clone mesh frame\n",
1553 rx->dev->name);
1554
1555 fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
e32f85f7 1556 memcpy(fwd_hdr->addr2, rx->dev->dev_addr, ETH_ALEN);
3b8d81e0
JB		 1557 info = IEEE80211_SKB_CB(fwd_skb);
1558 memset(info, 0, sizeof(*info));
1559 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
5061b0c2 1560 info->control.vif = &rx->sdata->vif;
3b8d81e0 1561 ieee80211_select_queue(local, fwd_skb);
c8a61a7d
DW		 1562 if (is_multicast_ether_addr(fwd_hdr->addr1))
1563 IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
1564 fwded_mcast);
1565 else {
3c5772a5
JC		 1566 int err;
1567 /*
1568 * Save TA to addr1 to send TA a path error if a
1569 * suitable next hop is not found
1570 */
1571 memcpy(fwd_hdr->addr1, fwd_hdr->addr2,
249b405c 1572 ETH_ALEN);
3c5772a5 1573 err = mesh_nexthop_lookup(fwd_skb, sdata);
249b405c
JC		 1574 /* Failed to immediately resolve next hop:
1575 * fwded frame was dropped or will be added
1576 * later to the pending skb queue. */
1577 if (err)
1578 return RX_DROP_MONITOR;
c8a61a7d
DW		 1579
1580 IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
1581 fwded_unicast);
249b405c
JC		 1582 }
1583 IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
1584 fwded_frames);
3b8d81e0 1585 ieee80211_add_pending_skb(local, fwd_skb);
e32f85f7
LCC		 1586 }
1587 }
1588
3c5772a5 1589 if (is_multicast_ether_addr(hdr->addr1) ||
e32f85f7
LCC		 1590 rx->dev->flags & IFF_PROMISC)
1591 return RX_CONTINUE;
1592 else
1593 return RX_DROP_MONITOR;
1594}
bf94e17b 1595#endif
e32f85f7 1596
49461622 1597static ieee80211_rx_result debug_noinline
5cf121c3 1598ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
76ee65bf
RR		 1599{
1600 struct net_device *dev = rx->dev;
358c8d9d
HH		 1601 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
1602 __le16 fc = hdr->frame_control;
ce3edf6d 1603 int err;
76ee65bf 1604
358c8d9d 1605 if (unlikely(!ieee80211_is_data(hdr->frame_control)))
9ae54c84 1606 return RX_CONTINUE;
76ee65bf 1607
358c8d9d 1608 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
e4c26add 1609 return RX_DROP_MONITOR;
76ee65bf 1610
e31a16d6 1611 err = __ieee80211_data_to_8023(rx);
76ee65bf 1612 if (unlikely(err))
e4c26add 1613 return RX_DROP_UNUSABLE;
76ee65bf 1614
358c8d9d 1615 if (!ieee80211_frame_allowed(rx, fc))
e4c26add 1616 return RX_DROP_MONITOR;
ce3edf6d 1617
76ee65bf
RR		 1618 rx->skb->dev = dev;
1619
1620 dev->stats.rx_packets++;
1621 dev->stats.rx_bytes += rx->skb->len;
1622
1623 ieee80211_deliver_skb(rx);
571ecf67 1624
9ae54c84 1625 return RX_QUEUED;
571ecf67
JB		 1626}
1627
49461622 1628static ieee80211_rx_result debug_noinline
5cf121c3 1629ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
71364716
RR		 1630{
1631 struct ieee80211_local *local = rx->local;
1632 struct ieee80211_hw *hw = &local->hw;
1633 struct sk_buff *skb = rx->skb;
a7767f95 1634 struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data;
71364716
RR		 1635 struct tid_ampdu_rx *tid_agg_rx;
1636 u16 start_seq_num;
1637 u16 tid;
1638
a7767f95 1639 if (likely(!ieee80211_is_ctl(bar->frame_control)))
9ae54c84 1640 return RX_CONTINUE;
71364716 1641
a7767f95 1642 if (ieee80211_is_back_req(bar->frame_control)) {
71364716 1643 if (!rx->sta)
9ae54c84 1644 return RX_CONTINUE;
71364716 1645 tid = le16_to_cpu(bar->control) >> 12;
cee24a3e
RR		 1646 if (rx->sta->ampdu_mlme.tid_state_rx[tid]
1647 != HT_AGG_STATE_OPERATIONAL)
9ae54c84 1648 return RX_CONTINUE;
cee24a3e 1649 tid_agg_rx = rx->sta->ampdu_mlme.tid_rx[tid];
71364716
RR		 1650
1651 start_seq_num = le16_to_cpu(bar->start_seq_num) >> 4;
1652
1653 /* reset session timer */
20ad19d0
JB		 1654 if (tid_agg_rx->timeout)
1655 mod_timer(&tid_agg_rx->session_timer,
1656 TU_TO_EXP_TIME(tid_agg_rx->timeout));
71364716
RR		 1657
1658 /* manage reordering buffer according to requested */
1659 /* sequence number */
1660 rcu_read_lock();
f1d58c25 1661 ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL,
71364716
RR		 1662 start_seq_num, 1);
1663 rcu_read_unlock();
e4c26add 1664 return RX_DROP_UNUSABLE;
71364716
RR		 1665 }
1666
9ae54c84 1667 return RX_CONTINUE;
71364716
RR		 1668}
1669
f4f727a6
JM		 1670static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata,
1671 struct ieee80211_mgmt *mgmt,
1672 size_t len)
fea14732
JM		 1673{
1674 struct ieee80211_local *local = sdata->local;
1675 struct sk_buff *skb;
1676 struct ieee80211_mgmt *resp;
1677
1678 if (compare_ether_addr(mgmt->da, sdata->dev->dev_addr) != 0) {
1679 /* Not to own unicast address */
1680 return;
1681 }
1682
46900298
JB		 1683 if (compare_ether_addr(mgmt->sa, sdata->u.mgd.bssid) != 0 ||
1684 compare_ether_addr(mgmt->bssid, sdata->u.mgd.bssid) != 0) {
77fdaa12 1685 /* Not from the current AP or not associated yet. */
fea14732
JM		 1686 return;
1687 }
1688
1689 if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) {
1690 /* Too short SA Query request frame */
1691 return;
1692 }
1693
1694 skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom);
1695 if (skb == NULL)
1696 return;
1697
1698 skb_reserve(skb, local->hw.extra_tx_headroom);
1699 resp = (struct ieee80211_mgmt *) skb_put(skb, 24);
1700 memset(resp, 0, 24);
1701 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1702 memcpy(resp->sa, sdata->dev->dev_addr, ETH_ALEN);
46900298 1703 memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN);
fea14732
JM		 1704 resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1705 IEEE80211_STYPE_ACTION);
1706 skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query));
1707 resp->u.action.category = WLAN_CATEGORY_SA_QUERY;
1708 resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE;
1709 memcpy(resp->u.action.u.sa_query.trans_id,
1710 mgmt->u.action.u.sa_query.trans_id,
1711 WLAN_SA_QUERY_TR_ID_LEN);
1712
1713 ieee80211_tx_skb(sdata, skb, 1);
1714}
1715
de1ede7a
JB		 1716static ieee80211_rx_result debug_noinline
1717ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
1718{
1719 struct ieee80211_local *local = rx->local;
1720 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
1721 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
1722 int len = rx->skb->len;
1723
1724 if (!ieee80211_is_action(mgmt->frame_control))
1725 return RX_CONTINUE;
1726
1727 if (!rx->sta)
1728 return RX_DROP_MONITOR;
1729
1730 if (!(rx->flags & IEEE80211_RX_RA_MATCH))
1731 return RX_DROP_MONITOR;
1732
97ebe12a
JM		 1733 if (ieee80211_drop_unencrypted(rx, mgmt->frame_control))
1734 return RX_DROP_MONITOR;
1735
de1ede7a
JB		 1736 /* all categories we currently handle have action_code */
1737 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
1738 return RX_DROP_MONITOR;
1739
de1ede7a
JB		 1740 switch (mgmt->u.action.category) {
1741 case WLAN_CATEGORY_BACK:
8abd3f9b
JB		 1742 /*
1743 * The aggregation code is not prepared to handle
1744 * anything but STA/AP due to the BSSID handling;
1745 * IBSS could work in the code but isn't supported
1746 * by drivers or the standard.
1747 */
1748 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
1749 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1750 sdata->vif.type != NL80211_IFTYPE_AP)
1751 return RX_DROP_MONITOR;
1752
de1ede7a
JB		 1753 switch (mgmt->u.action.u.addba_req.action_code) {
1754 case WLAN_ACTION_ADDBA_REQ:
1755 if (len < (IEEE80211_MIN_ACTION_SIZE +
1756 sizeof(mgmt->u.action.u.addba_req)))
1757 return RX_DROP_MONITOR;
1758 ieee80211_process_addba_request(local, rx->sta, mgmt, len);
1759 break;
1760 case WLAN_ACTION_ADDBA_RESP:
1761 if (len < (IEEE80211_MIN_ACTION_SIZE +
1762 sizeof(mgmt->u.action.u.addba_resp)))
1763 return RX_DROP_MONITOR;
1764 ieee80211_process_addba_resp(local, rx->sta, mgmt, len);
1765 break;
1766 case WLAN_ACTION_DELBA:
1767 if (len < (IEEE80211_MIN_ACTION_SIZE +
1768 sizeof(mgmt->u.action.u.delba)))
1769 return RX_DROP_MONITOR;
1770 ieee80211_process_delba(sdata, rx->sta, mgmt, len);
1771 break;
1772 }
39192c0b
JB		 1773 break;
1774 case WLAN_CATEGORY_SPECTRUM_MGMT:
1775 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
1776 return RX_DROP_MONITOR;
46900298
JB		 1777
1778 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1779 return RX_DROP_MONITOR;
1780
39192c0b
JB		 1781 switch (mgmt->u.action.u.measurement.action_code) {
1782 case WLAN_ACTION_SPCT_MSR_REQ:
1783 if (len < (IEEE80211_MIN_ACTION_SIZE +
1784 sizeof(mgmt->u.action.u.measurement)))
1785 return RX_DROP_MONITOR;
1786 ieee80211_process_measurement_req(sdata, mgmt, len);
1787 break;
c481ec97
S		 1788 case WLAN_ACTION_SPCT_CHL_SWITCH:
1789 if (len < (IEEE80211_MIN_ACTION_SIZE +
1790 sizeof(mgmt->u.action.u.chan_switch)))
1791 return RX_DROP_MONITOR;
1792
cc32abd4
JB		 1793 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1794 return RX_DROP_MONITOR;
1795
46900298 1796 if (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN))
c481ec97
S		 1797 return RX_DROP_MONITOR;
1798
77fdaa12 1799 return ieee80211_sta_rx_mgmt(sdata, rx->skb);
39192c0b
JB		 1800 }
1801 break;
fea14732
JM		 1802 case WLAN_CATEGORY_SA_QUERY:
1803 if (len < (IEEE80211_MIN_ACTION_SIZE +
1804 sizeof(mgmt->u.action.u.sa_query)))
1805 return RX_DROP_MONITOR;
1806 switch (mgmt->u.action.u.sa_query.action) {
1807 case WLAN_ACTION_SA_QUERY_REQUEST:
1808 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1809 return RX_DROP_MONITOR;
1810 ieee80211_process_sa_query_req(sdata, mgmt, len);
1811 break;
1812 case WLAN_ACTION_SA_QUERY_RESPONSE:
1813 /*
1814 * SA Query response is currently only used in AP mode
1815 * and it is processed in user space.
1816 */
1817 return RX_CONTINUE;
1818 }
1819 break;
39192c0b
JB		 1820 default:
1821 return RX_CONTINUE;
de1ede7a
JB		 1822 }
1823
39192c0b
JB		 1824 rx->sta->rx_packets++;
1825 dev_kfree_skb(rx->skb);
1826 return RX_QUEUED;
de1ede7a
JB		 1827}
1828
49461622 1829static ieee80211_rx_result debug_noinline
5cf121c3 1830ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
571ecf67 1831{
759ef3eb 1832 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
97ebe12a 1833 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
571ecf67 1834
5cf121c3 1835 if (!(rx->flags & IEEE80211_RX_RA_MATCH))
e4c26add 1836 return RX_DROP_MONITOR;
571ecf67 1837
97ebe12a
JM		 1838 if (ieee80211_drop_unencrypted(rx, mgmt->frame_control))
1839 return RX_DROP_MONITOR;
1840
472dbc45 1841 if (ieee80211_vif_is_mesh(&sdata->vif))
f1d58c25 1842 return ieee80211_mesh_rx_mgmt(sdata, rx->skb);
472dbc45 1843
3832c287 1844 if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
f1d58c25 1845 return ieee80211_ibss_rx_mgmt(sdata, rx->skb);
f9d540ee 1846
7986cf95 1847 if (sdata->vif.type == NL80211_IFTYPE_STATION)
f1d58c25 1848 return ieee80211_sta_rx_mgmt(sdata, rx->skb);
46900298 1849
7986cf95 1850 return RX_DROP_MONITOR;
571ecf67
JB		 1851}
1852
3b8d81e0 1853static void ieee80211_rx_michael_mic_report(struct ieee80211_hdr *hdr,
5cf121c3 1854 struct ieee80211_rx_data *rx)
571ecf67 1855{
a7767f95
HH		 1856 int keyidx;
1857 unsigned int hdrlen;
571ecf67 1858
a7767f95 1859 hdrlen = ieee80211_hdrlen(hdr->frame_control);
571ecf67
JB		 1860 if (rx->skb->len >= hdrlen + 4)
1861 keyidx = rx->skb->data[hdrlen + 3] >> 6;
1862 else
1863 keyidx = -1;
1864
8944b79f 1865 if (!rx->sta) {
aa0daf0e
JB		 1866 /*
1867 * Some hardware seem to generate incorrect Michael MIC
1868 * reports; ignore them to avoid triggering countermeasures.
1869 */
571ecf67
JB		 1870 goto ignore;
1871 }
1872
a7767f95 1873 if (!ieee80211_has_protected(hdr->frame_control))
571ecf67 1874 goto ignore;
571ecf67 1875
05c914fe 1876 if (rx->sdata->vif.type == NL80211_IFTYPE_AP && keyidx) {
aa0daf0e
JB		 1877 /*
1878 * APs with pairwise keys should never receive Michael MIC
1879 * errors for non-zero keyidx because these are reserved for
1880 * group keys and only the AP is sending real multicast
1881 * frames in the BSS.
1882 */
eb063c17 1883 goto ignore;
571ecf67
JB		 1884 }
1885
a7767f95
HH		 1886 if (!ieee80211_is_data(hdr->frame_control) &&
1887 !ieee80211_is_auth(hdr->frame_control))
571ecf67 1888 goto ignore;
571ecf67 1889
e6d6e342
JB		 1890 mac80211_ev_michael_mic_failure(rx->sdata, keyidx, hdr, NULL,
1891 GFP_ATOMIC);
571ecf67
JB		 1892 ignore:
1893 dev_kfree_skb(rx->skb);
1894 rx->skb = NULL;
1895}
1896
5cf121c3
JB		 1897/* TODO: use IEEE80211_RX_FRAGMENTED */
1898static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx)
3d30d949
MW		 1899{
1900 struct ieee80211_sub_if_data *sdata;
1901 struct ieee80211_local *local = rx->local;
1902 struct ieee80211_rtap_hdr {
1903 struct ieee80211_radiotap_header hdr;
1904 u8 flags;
1905 u8 rate;
1906 __le16 chan_freq;
1907 __le16 chan_flags;
1908 } __attribute__ ((packed)) *rthdr;
1909 struct sk_buff *skb = rx->skb, *skb2;
1910 struct net_device *prev_dev = NULL;
5cf121c3 1911 struct ieee80211_rx_status *status = rx->status;
3d30d949 1912
5cf121c3 1913 if (rx->flags & IEEE80211_RX_CMNTR_REPORTED)
3d30d949
MW		 1914 goto out_free_skb;
1915
1916 if (skb_headroom(skb) < sizeof(*rthdr) &&
1917 pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC))
1918 goto out_free_skb;
1919
1920 rthdr = (void *)skb_push(skb, sizeof(*rthdr));
1921 memset(rthdr, 0, sizeof(*rthdr));
1922 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1923 rthdr->hdr.it_present =
1924 cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
1925 (1 << IEEE80211_RADIOTAP_RATE) |
1926 (1 << IEEE80211_RADIOTAP_CHANNEL));
1927
5cf121c3 1928 rthdr->rate = rx->rate->bitrate / 5;
3d30d949
MW		 1929 rthdr->chan_freq = cpu_to_le16(status->freq);
1930
1931 if (status->band == IEEE80211_BAND_5GHZ)
1932 rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_OFDM |
1933 IEEE80211_CHAN_5GHZ);
1934 else
1935 rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_DYN |
1936 IEEE80211_CHAN_2GHZ);
1937
1938 skb_set_mac_header(skb, 0);
1939 skb->ip_summed = CHECKSUM_UNNECESSARY;
1940 skb->pkt_type = PACKET_OTHERHOST;
1941 skb->protocol = htons(ETH_P_802_2);
1942
1943 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1944 if (!netif_running(sdata->dev))
1945 continue;
1946
05c914fe 1947 if (sdata->vif.type != NL80211_IFTYPE_MONITOR ||
3d30d949
MW		 1948 !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES))
1949 continue;
1950
1951 if (prev_dev) {
1952 skb2 = skb_clone(skb, GFP_ATOMIC);
1953 if (skb2) {
1954 skb2->dev = prev_dev;
1955 netif_rx(skb2);
1956 }
1957 }
1958
1959 prev_dev = sdata->dev;
1960 sdata->dev->stats.rx_packets++;
1961 sdata->dev->stats.rx_bytes += skb->len;
1962 }
1963
1964 if (prev_dev) {
1965 skb->dev = prev_dev;
1966 netif_rx(skb);
1967 skb = NULL;
1968 } else
1969 goto out_free_skb;
1970
5cf121c3 1971 rx->flags |= IEEE80211_RX_CMNTR_REPORTED;
3d30d949
MW		 1972 return;
1973
1974 out_free_skb:
1975 dev_kfree_skb(skb);
1976}
1977
571ecf67 1978
8944b79f 1979static void ieee80211_invoke_rx_handlers(struct ieee80211_sub_if_data *sdata,
5cf121c3 1980 struct ieee80211_rx_data *rx,
8944b79f 1981 struct sk_buff *skb)
58905290 1982{
58905290
JB		 1983 ieee80211_rx_result res = RX_DROP_MONITOR;
1984
8944b79f
JB		 1985 rx->skb = skb;
1986 rx->sdata = sdata;
1987 rx->dev = sdata->dev;
1988
e32f85f7
LCC		 1989#define CALL_RXH(rxh) \
1990 do { \
1991 res = rxh(rx); \
1992 if (res != RX_CONTINUE) \
1993 goto rxh_done; \
1994 } while (0);
49461622
JB		 1995
1996 CALL_RXH(ieee80211_rx_h_passive_scan)
1997 CALL_RXH(ieee80211_rx_h_check)
1998 CALL_RXH(ieee80211_rx_h_decrypt)
572e0012 1999 CALL_RXH(ieee80211_rx_h_check_more_data)
49461622
JB		 2000 CALL_RXH(ieee80211_rx_h_sta_process)
2001 CALL_RXH(ieee80211_rx_h_defragment)
2002 CALL_RXH(ieee80211_rx_h_ps_poll)
2003 CALL_RXH(ieee80211_rx_h_michael_mic_verify)
2004 /* must be after MMIC verify so header is counted in MPDU mic */
2005 CALL_RXH(ieee80211_rx_h_remove_qos_control)
2006 CALL_RXH(ieee80211_rx_h_amsdu)
bf94e17b 2007#ifdef CONFIG_MAC80211_MESH
e32f85f7
LCC		 2008 if (ieee80211_vif_is_mesh(&sdata->vif))
2009 CALL_RXH(ieee80211_rx_h_mesh_fwding);
bf94e17b 2010#endif
49461622
JB		 2011 CALL_RXH(ieee80211_rx_h_data)
2012 CALL_RXH(ieee80211_rx_h_ctrl)
de1ede7a 2013 CALL_RXH(ieee80211_rx_h_action)
49461622
JB		 2014 CALL_RXH(ieee80211_rx_h_mgmt)
2015
2016#undef CALL_RXH
2017
2018 rxh_done:
58905290
JB		 2019 switch (res) {
2020 case RX_DROP_MONITOR:
49461622
JB		 2021 I802_DEBUG_INC(sdata->local->rx_handlers_drop);
2022 if (rx->sta)
2023 rx->sta->rx_dropped++;
2024 /* fall through */
2025 case RX_CONTINUE:
3d30d949
MW		 2026 ieee80211_rx_cooked_monitor(rx);
2027 break;
58905290 2028 case RX_DROP_UNUSABLE:
49461622
JB		 2029 I802_DEBUG_INC(sdata->local->rx_handlers_drop);
2030 if (rx->sta)
2031 rx->sta->rx_dropped++;
58905290
JB		 2032 dev_kfree_skb(rx->skb);
2033 break;
49461622
JB		 2034 case RX_QUEUED:
2035 I802_DEBUG_INC(sdata->local->rx_handlers_queued);
2036 break;
58905290
JB		 2037 }
2038}
2039
571ecf67
JB		 2040/* main receive path */
2041
23a24def 2042static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
7ab17c45 2043 struct ieee80211_rx_data *rx,
23a24def
JB		 2044 struct ieee80211_hdr *hdr)
2045{
7ab17c45 2046 u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, sdata->vif.type);
23a24def
JB		 2047 int multicast = is_multicast_ether_addr(hdr->addr1);
2048
51fb61e7 2049 switch (sdata->vif.type) {
05c914fe 2050 case NL80211_IFTYPE_STATION:
23a24def
JB		 2051 if (!bssid)
2052 return 0;
77fdaa12
JB		 2053 if (!multicast &&
2054 compare_ether_addr(sdata->dev->dev_addr, hdr->addr1) != 0) {
4150c572 2055 if (!(sdata->dev->flags & IFF_PROMISC))
23a24def 2056 return 0;
5cf121c3 2057 rx->flags &= ~IEEE80211_RX_RA_MATCH;
23a24def
JB		 2058 }
2059 break;
05c914fe 2060 case NL80211_IFTYPE_ADHOC:
23a24def
JB		 2061 if (!bssid)
2062 return 0;
a7767f95 2063 if (ieee80211_is_beacon(hdr->frame_control)) {
9d9bf77d 2064 return 1;
87291c02 2065 }
46900298 2066 else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) {
5cf121c3 2067 if (!(rx->flags & IEEE80211_RX_IN_SCAN))
23a24def 2068 return 0;
5cf121c3 2069 rx->flags &= ~IEEE80211_RX_RA_MATCH;
23a24def
JB		 2070 } else if (!multicast &&
2071 compare_ether_addr(sdata->dev->dev_addr,
2072 hdr->addr1) != 0) {
4150c572 2073 if (!(sdata->dev->flags & IFF_PROMISC))
23a24def 2074 return 0;
5cf121c3 2075 rx->flags &= ~IEEE80211_RX_RA_MATCH;
0fb8ca45
JM		 2076 } else if (!rx->sta) {
2077 int rate_idx;
2078 if (rx->status->flag & RX_FLAG_HT)
2079 rate_idx = 0; /* TODO: HT rates */
2080 else
2081 rate_idx = rx->status->rate_idx;
ab1f5c0b 2082 rx->sta = ieee80211_ibss_add_sta(sdata, bssid, hdr->addr2,
0fb8ca45
JM		 2083 BIT(rate_idx));
2084 }
23a24def 2085 break;
05c914fe 2086 case NL80211_IFTYPE_MESH_POINT:
6032f934
JB		 2087 if (!multicast &&
2088 compare_ether_addr(sdata->dev->dev_addr,
2089 hdr->addr1) != 0) {
2090 if (!(sdata->dev->flags & IFF_PROMISC))
2091 return 0;
2092
5cf121c3 2093 rx->flags &= ~IEEE80211_RX_RA_MATCH;
6032f934
JB		 2094 }
2095 break;
05c914fe
JB		 2096 case NL80211_IFTYPE_AP_VLAN:
2097 case NL80211_IFTYPE_AP:
23a24def
JB		 2098 if (!bssid) {
2099 if (compare_ether_addr(sdata->dev->dev_addr,
2100 hdr->addr1))
2101 return 0;
2102 } else if (!ieee80211_bssid_match(bssid,
2103 sdata->dev->dev_addr)) {
5cf121c3 2104 if (!(rx->flags & IEEE80211_RX_IN_SCAN))
23a24def 2105 return 0;
5cf121c3 2106 rx->flags &= ~IEEE80211_RX_RA_MATCH;
23a24def 2107 }
23a24def 2108 break;
05c914fe 2109 case NL80211_IFTYPE_WDS:
a7767f95 2110 if (bssid || !ieee80211_is_data(hdr->frame_control))
23a24def
JB		 2111 return 0;
2112 if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2))
2113 return 0;
2114 break;
05c914fe 2115 case NL80211_IFTYPE_MONITOR:
fb1c1cd6
JB		 2116 /* take everything */
2117 break;
05c914fe
JB		 2118 case NL80211_IFTYPE_UNSPECIFIED:
2119 case __NL80211_IFTYPE_AFTER_LAST:
fb1c1cd6
JB		 2120 /* should never get here */
2121 WARN_ON(1);
2122 break;
23a24def
JB		 2123 }
2124
2125 return 1;
2126}
2127
571ecf67 2128/*
6368e4b1
RR		 2129 * This is the actual Rx frames handler. as it blongs to Rx path it must
2130 * be called with rcu_read_lock protection.
571ecf67 2131 */
71ebb4aa
RR		 2132static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
2133 struct sk_buff *skb,
8318d78a 2134 struct ieee80211_rate *rate)
571ecf67 2135{
f1d58c25 2136 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
571ecf67
JB		 2137 struct ieee80211_local *local = hw_to_local(hw);
2138 struct ieee80211_sub_if_data *sdata;
571ecf67 2139 struct ieee80211_hdr *hdr;
5cf121c3 2140 struct ieee80211_rx_data rx;
6368e4b1 2141 int prepares;
8e6f0032
JB		 2142 struct ieee80211_sub_if_data *prev = NULL;
2143 struct sk_buff *skb_new;
571ecf67 2144
358c8d9d 2145 hdr = (struct ieee80211_hdr *)skb->data;
571ecf67
JB		 2146 memset(&rx, 0, sizeof(rx));
2147 rx.skb = skb;
2148 rx.local = local;
2149
5cf121c3 2150 rx.status = status;
5cf121c3 2151 rx.rate = rate;
72abd81b 2152
358c8d9d 2153 if (ieee80211_is_data(hdr->frame_control) || ieee80211_is_mgmt(hdr->frame_control))
571ecf67 2154 local->dot11ReceivedFragmentCount++;
571ecf67 2155
8944b79f
JB		 2156 rx.sta = sta_info_get(local, hdr->addr2);
2157 if (rx.sta) {
d0709a65
JB		 2158 rx.sdata = rx.sta->sdata;
2159 rx.dev = rx.sta->sdata->dev;
b2e7771e 2160 }
571ecf67 2161
571ecf67 2162 if ((status->flag & RX_FLAG_MMIC_ERROR)) {
3b8d81e0 2163 ieee80211_rx_michael_mic_report(hdr, &rx);
d0709a65 2164 return;
571ecf67
JB		 2165 }
2166
142b9f50
HS		 2167 if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
2168 test_bit(SCAN_OFF_CHANNEL, &local->scanning)))
5cf121c3 2169 rx.flags |= IEEE80211_RX_IN_SCAN;
571ecf67 2170
38f3714d 2171 ieee80211_parse_qos(&rx);
d1c3a37c 2172 ieee80211_verify_alignment(&rx);
38f3714d 2173
571ecf67
JB		 2174 skb = rx.skb;
2175
fbc44bf7
JB		 2176 if (rx.sdata && ieee80211_is_data(hdr->frame_control)) {
2177 rx.flags |= IEEE80211_RX_RA_MATCH;
2178 prepares = prepare_for_handlers(rx.sdata, &rx, hdr);
2179 if (prepares)
2180 prev = rx.sdata;
2181 } else list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2a8a9a88
JB		 2182 if (!netif_running(sdata->dev))
2183 continue;
2184
fbc44bf7
JB		 2185 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2186 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
b2e7771e
JB		 2187 continue;
2188
5cf121c3 2189 rx.flags |= IEEE80211_RX_RA_MATCH;
7ab17c45 2190 prepares = prepare_for_handlers(sdata, &rx, hdr);
23a24def 2191
6368e4b1 2192 if (!prepares)
23a24def 2193 continue;
8e6f0032 2194
340e11f3
JB		 2195 /*
2196 * frame is destined for this interface, but if it's not
2197 * also for the previous one we handle that after the
2198 * loop to avoid copying the SKB once too much
2199 */
2200
2201 if (!prev) {
2202 prev = sdata;
2203 continue;
8e6f0032 2204 }
340e11f3
JB		 2205
2206 /*
2207 * frame was destined for the previous interface
2208 * so invoke RX handlers for it
2209 */
2210
2211 skb_new = skb_copy(skb, GFP_ATOMIC);
2212 if (!skb_new) {
2213 if (net_ratelimit())
2214 printk(KERN_DEBUG "%s: failed to copy "
a4278e18 2215 "multicast frame for %s\n",
dd1cd4c6
JB		 2216 wiphy_name(local->hw.wiphy),
2217 prev->dev->name);
340e11f3
JB		 2218 continue;
2219 }
8944b79f 2220 ieee80211_invoke_rx_handlers(prev, &rx, skb_new);
8e6f0032 2221 prev = sdata;
571ecf67 2222 }
a4b7d7bd 2223 if (prev)
8944b79f 2224 ieee80211_invoke_rx_handlers(prev, &rx, skb);
a4b7d7bd 2225 else
8e6f0032 2226 dev_kfree_skb(skb);
571ecf67 2227}
6368e4b1 2228
b580781e
RR		 2229#define SEQ_MODULO 0x1000
2230#define SEQ_MASK 0xfff
2231
2232static inline int seq_less(u16 sq1, u16 sq2)
2233{
c6a1fa12 2234 return ((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1);
b580781e
RR		 2235}
2236
2237static inline u16 seq_inc(u16 sq)
2238{
c6a1fa12 2239 return (sq + 1) & SEQ_MASK;
b580781e
RR		 2240}
2241
2242static inline u16 seq_sub(u16 sq1, u16 sq2)
2243{
c6a1fa12 2244 return (sq1 - sq2) & SEQ_MASK;
b580781e
RR		 2245}
2246
2247
2d3babd1
JM		 2248static void ieee80211_release_reorder_frame(struct ieee80211_hw *hw,
2249 struct tid_ampdu_rx *tid_agg_rx,
2250 int index)
2251{
2252 struct ieee80211_supported_band *sband;
2253 struct ieee80211_rate *rate;
f1d58c25
JB		 2254 struct sk_buff *skb = tid_agg_rx->reorder_buf[index];
2255 struct ieee80211_rx_status *status;
2d3babd1 2256
f1d58c25 2257 if (!skb)
2d3babd1
JM		 2258 goto no_frame;
2259
f1d58c25
JB		 2260 status = IEEE80211_SKB_RXCB(skb);
2261
2d3babd1 2262 /* release the reordered frames to stack */
f1d58c25
JB		 2263 sband = hw->wiphy->bands[status->band];
2264 if (status->flag & RX_FLAG_HT)
2d3babd1
JM		 2265 rate = sband->bitrates; /* TODO: HT rates */
2266 else
f1d58c25
JB		 2267 rate = &sband->bitrates[status->rate_idx];
2268 __ieee80211_rx_handle_packet(hw, skb, rate);
2d3babd1
JM		 2269 tid_agg_rx->stored_mpdu_num--;
2270 tid_agg_rx->reorder_buf[index] = NULL;
2271
2272no_frame:
2273 tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num);
2274}
2275
2276
4d050f1d
JM		 2277/*
2278 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
2279 * the skb was added to the buffer longer than this time ago, the earlier
2280 * frames that have not yet been received are assumed to be lost and the skb
2281 * can be released for processing. This may also release other skb's from the
2282 * reorder buffer if there are no additional gaps between the frames.
2283 */
2284#define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
2285
71364716
RR		 2286/*
2287 * As it function blongs to Rx path it must be called with
2288 * the proper rcu_read_lock protection for its flow.
2289 */
c6a1fa12
JB		 2290static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
2291 struct tid_ampdu_rx *tid_agg_rx,
2292 struct sk_buff *skb,
2293 u16 mpdu_seq_num,
2294 int bar_req)
b580781e 2295{
b580781e
RR		 2296 u16 head_seq_num, buf_size;
2297 int index;
b580781e
RR		 2298
2299 buf_size = tid_agg_rx->buf_size;
2300 head_seq_num = tid_agg_rx->head_seq_num;
2301
2302 /* frame with out of date sequence number */
2303 if (seq_less(mpdu_seq_num, head_seq_num)) {
2304 dev_kfree_skb(skb);
2305 return 1;
2306 }
2307
2308 /* if frame sequence number exceeds our buffering window size or
2309 * block Ack Request arrived - release stored frames */
2310 if ((!seq_less(mpdu_seq_num, head_seq_num + buf_size)) || (bar_req)) {
2311 /* new head to the ordering buffer */
2312 if (bar_req)
2313 head_seq_num = mpdu_seq_num;
2314 else
2315 head_seq_num =
2316 seq_inc(seq_sub(mpdu_seq_num, buf_size));
2317 /* release stored frames up to new head to stack */
2318 while (seq_less(tid_agg_rx->head_seq_num, head_seq_num)) {
2319 index = seq_sub(tid_agg_rx->head_seq_num,
2320 tid_agg_rx->ssn)
2321 % tid_agg_rx->buf_size;
2d3babd1
JM		 2322 ieee80211_release_reorder_frame(hw, tid_agg_rx,
2323 index);
b580781e
RR		 2324 }
2325 if (bar_req)
2326 return 1;
2327 }
2328
2329 /* now the new frame is always in the range of the reordering */
2330 /* buffer window */
2331 index = seq_sub(mpdu_seq_num, tid_agg_rx->ssn)
2332 % tid_agg_rx->buf_size;
2333 /* check if we already stored this frame */
2334 if (tid_agg_rx->reorder_buf[index]) {
2335 dev_kfree_skb(skb);
2336 return 1;
2337 }
2338
2339 /* if arrived mpdu is in the right order and nothing else stored */
2340 /* release it immediately */
2341 if (mpdu_seq_num == tid_agg_rx->head_seq_num &&
2342 tid_agg_rx->stored_mpdu_num == 0) {
2343 tid_agg_rx->head_seq_num =
2344 seq_inc(tid_agg_rx->head_seq_num);
2345 return 0;
2346 }
2347
2348 /* put the frame in the reordering buffer */
2349 tid_agg_rx->reorder_buf[index] = skb;
4d050f1d 2350 tid_agg_rx->reorder_time[index] = jiffies;
b580781e
RR		 2351 tid_agg_rx->stored_mpdu_num++;
2352 /* release the buffer until next missing frame */
2353 index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn)
2354 % tid_agg_rx->buf_size;
4d050f1d
JM		 2355 if (!tid_agg_rx->reorder_buf[index] &&
2356 tid_agg_rx->stored_mpdu_num > 1) {
2357 /*
2358 * No buffers ready to be released, but check whether any
2359 * frames in the reorder buffer have timed out.
2360 */
2361 int j;
2362 int skipped = 1;
2363 for (j = (index + 1) % tid_agg_rx->buf_size; j != index;
2364 j = (j + 1) % tid_agg_rx->buf_size) {
2365 if (tid_agg_rx->reorder_buf[j] == NULL) {
2366 skipped++;
2367 continue;
2368 }
2369 if (!time_after(jiffies, tid_agg_rx->reorder_time[j] +
2370 HZ / 10))
2371 break;
2372
2373#ifdef CONFIG_MAC80211_HT_DEBUG
2374 if (net_ratelimit())
2375 printk(KERN_DEBUG "%s: release an RX reorder "
2376 "frame due to timeout on earlier "
2377 "frames\n",
2378 wiphy_name(hw->wiphy));
2379#endif
2380 ieee80211_release_reorder_frame(hw, tid_agg_rx, j);
2381
2382 /*
2383 * Increment the head seq# also for the skipped slots.
2384 */
2385 tid_agg_rx->head_seq_num =
2386 (tid_agg_rx->head_seq_num + skipped) &
2387 SEQ_MASK;
2388 skipped = 0;
2389 }
2390 } else while (tid_agg_rx->reorder_buf[index]) {
2d3babd1 2391 ieee80211_release_reorder_frame(hw, tid_agg_rx, index);
b580781e
RR		 2392 index = seq_sub(tid_agg_rx->head_seq_num,
2393 tid_agg_rx->ssn) % tid_agg_rx->buf_size;
2394 }
2395 return 1;
2396}
2397
71ebb4aa 2398static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local,
f1d58c25 2399 struct sk_buff *skb)
b580781e
RR		 2400{
2401 struct ieee80211_hw *hw = &local->hw;
2402 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2403 struct sta_info *sta;
2404 struct tid_ampdu_rx *tid_agg_rx;
87228f57 2405 u16 sc;
b580781e 2406 u16 mpdu_seq_num;
182503ab 2407 u8 ret = 0;
b580781e
RR		 2408 int tid;
2409
2410 sta = sta_info_get(local, hdr->addr2);
2411 if (!sta)
2412 return ret;
2413
b580781e
RR		 2414 /* filter the QoS data rx stream according to
2415 * STA/TID and check if this STA/TID is on aggregation */
87228f57 2416 if (!ieee80211_is_data_qos(hdr->frame_control))
b580781e
RR		 2417 goto end_reorder;
2418
238f74a2 2419 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
b580781e 2420
cee24a3e 2421 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL)
b580781e
RR		 2422 goto end_reorder;
2423
cee24a3e
RR		 2424 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
2425
2560b6e2
EG		 2426 /* qos null data frames are excluded */
2427 if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC)))
b580781e
RR		 2428 goto end_reorder;
2429
2430 /* new un-ordered ampdu frame - process it */
2431
2432 /* reset session timer */
20ad19d0
JB		 2433 if (tid_agg_rx->timeout)
2434 mod_timer(&tid_agg_rx->session_timer,
2435 TU_TO_EXP_TIME(tid_agg_rx->timeout));
b580781e
RR		 2436
2437 /* if this mpdu is fragmented - terminate rx aggregation session */
2438 sc = le16_to_cpu(hdr->seq_ctrl);
2439 if (sc & IEEE80211_SCTL_FRAG) {
17741cdc 2440 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->sta.addr,
b580781e
RR		 2441 tid, 0, WLAN_REASON_QSTA_REQUIRE_SETUP);
2442 ret = 1;
2443 goto end_reorder;
2444 }
2445
2446 /* according to mpdu sequence number deal with reordering buffer */
2447 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
f1d58c25 2448 ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb,
b580781e 2449 mpdu_seq_num, 0);
d0709a65 2450 end_reorder:
b580781e
RR		 2451 return ret;
2452}
2453
6368e4b1
RR		 2454/*
2455 * This is the receive path handler. It is called by a low level driver when an
2456 * 802.11 MPDU is received from the hardware.
2457 */
103bf9f7 2458void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
6368e4b1
RR		 2459{
2460 struct ieee80211_local *local = hw_to_local(hw);
8318d78a
JB		 2461 struct ieee80211_rate *rate = NULL;
2462 struct ieee80211_supported_band *sband;
f1d58c25 2463 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
8318d78a 2464
d20ef63d
JB		 2465 WARN_ON_ONCE(softirq_count() == 0);
2466
77a980dc
JB		 2467 if (WARN_ON(status->band < 0 ||
2468 status->band >= IEEE80211_NUM_BANDS))
2469 goto drop;
8318d78a
JB		 2470
2471 sband = local->hw.wiphy->bands[status->band];
77a980dc
JB		 2472 if (WARN_ON(!sband))
2473 goto drop;
8318d78a 2474
89c3a8ac
JB		 2475 /*
2476 * If we're suspending, it is possible although not too likely
2477 * that we'd be receiving frames after having already partially
2478 * quiesced the stack. We can't process such frames then since
2479 * that might, for example, cause stations to be added or other
2480 * driver callbacks be invoked.
2481 */
77a980dc
JB		 2482 if (unlikely(local->quiescing || local->suspended))
2483 goto drop;
89c3a8ac 2484
ea77f12f
JB		 2485 /*
2486 * The same happens when we're not even started,
2487 * but that's worth a warning.
2488 */
77a980dc
JB		 2489 if (WARN_ON(!local->started))
2490 goto drop;
ea77f12f 2491
0fb8ca45
JM		 2492 if (status->flag & RX_FLAG_HT) {
2493 /* rate_idx is MCS index */
2494 if (WARN_ON(status->rate_idx < 0 ||
2495 status->rate_idx >= 76))
77a980dc 2496 goto drop;
0fb8ca45
JM		 2497 /* HT rates are not in the table - use the highest legacy rate
2498 * for now since other parts of mac80211 may not yet be fully
2499 * MCS aware. */
2500 rate = &sband->bitrates[sband->n_bitrates - 1];
2501 } else {
2502 if (WARN_ON(status->rate_idx < 0 ||
2503 status->rate_idx >= sband->n_bitrates))
77a980dc 2504 goto drop;
0fb8ca45
JM		 2505 rate = &sband->bitrates[status->rate_idx];
2506 }
6368e4b1
RR		 2507
2508 /*
2509 * key references and virtual interfaces are protected using RCU
2510 * and this requires that we are in a read-side RCU section during
2511 * receive processing
2512 */
2513 rcu_read_lock();
2514
2515 /*
2516 * Frames with failed FCS/PLCP checksum are not returned,
2517 * all other frames are returned without radiotap header
2518 * if it was previously present.
2519 * Also, frames with less than 16 bytes are dropped.
2520 */
f1d58c25 2521 skb = ieee80211_rx_monitor(local, skb, rate);
6368e4b1
RR		 2522 if (!skb) {
2523 rcu_read_unlock();
2524 return;
2525 }
2526
aec67952
JM		 2527 /*
2528 * In theory, the block ack reordering should happen after duplicate
2529 * removal (ieee80211_rx_h_check(), which is an RX handler). As such,
2530 * the call to ieee80211_rx_reorder_ampdu() should really be moved to
2531 * happen as a new RX handler between ieee80211_rx_h_check and
2532 * ieee80211_rx_h_decrypt. This cleanup may eventually happen, but for
2533 * the time being, the call can be here since RX reorder buf processing
2534 * will implicitly skip duplicates. We could, in theory at least,
2535 * process frames that ieee80211_rx_h_passive_scan would drop (e.g.,
2536 * frames from other than operational channel), but that should not
2537 * happen in normal networks.
2538 */
f1d58c25
JB		 2539 if (!ieee80211_rx_reorder_ampdu(local, skb))
2540 __ieee80211_rx_handle_packet(hw, skb, rate);
6368e4b1
RR		 2541
2542 rcu_read_unlock();
77a980dc
JB		 2543
2544 return;
2545 drop:
2546 kfree_skb(skb);
6368e4b1 2547}
103bf9f7 2548EXPORT_SYMBOL(ieee80211_rx);
571ecf67
JB		 2549
2550/* This is a version of the rx handler that can be called from hard irq
2551 * context. Post the skb on the queue and schedule the tasklet */
f1d58c25 2552void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb)
571ecf67
JB		 2553{
2554 struct ieee80211_local *local = hw_to_local(hw);
2555
2556 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
2557
571ecf67
JB		 2558 skb->pkt_type = IEEE80211_RX_MSG;
2559 skb_queue_tail(&local->skb_queue, skb);
2560 tasklet_schedule(&local->tasklet);
2561}
2562EXPORT_SYMBOL(ieee80211_rx_irqsafe);
Linux 6.x block layer and io_uring tree(s)