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mac80211: clean up ieee80211_i.h
[mirror_ubuntu-hirsute-kernel.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>
84040805 5 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
571ecf67
JB		 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>
5a0e3ad6 13#include <linux/slab.h>
571ecf67
JB		 14#include <linux/kernel.h>
15#include <linux/skbuff.h>
16#include <linux/netdevice.h>
17#include <linux/etherdevice.h>
d4e46a3d 18#include <linux/rcupdate.h>
bc3b2d7f 19#include <linux/export.h>
571ecf67
JB		 20#include <net/mac80211.h>
21#include <net/ieee80211_radiotap.h>
d26ad377 22#include <asm/unaligned.h>
571ecf67
JB		 23
24#include "ieee80211_i.h"
24487981 25#include "driver-ops.h"
2c8dccc7 26#include "led.h"
33b64eb2 27#include "mesh.h"
571ecf67
JB		 28#include "wep.h"
29#include "wpa.h"
30#include "tkip.h"
31#include "wme.h"
1d8d3dec 32#include "rate.h"
571ecf67 33
b2e7771e
JB		 34/*
35 * monitor mode reception
36 *
37 * This function cleans up the SKB, i.e. it removes all the stuff
38 * only useful for monitoring.
39 */
40static struct sk_buff *remove_monitor_info(struct ieee80211_local *local,
0869aea0 41 struct sk_buff *skb)
b2e7771e 42{
b2e7771e
JB		 43 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) {
44 if (likely(skb->len > FCS_LEN))
e3cf8b3f 45 __pskb_trim(skb, skb->len - FCS_LEN);
b2e7771e
JB		 46 else {
47 /* driver bug */
48 WARN_ON(1);
49 dev_kfree_skb(skb);
0624760c 50 return NULL;
b2e7771e
JB		 51 }
52 }
53
54 return skb;
55}
56
6b59db7d 57static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len)
b2e7771e 58{
f1d58c25 59 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
6b59db7d 60 struct ieee80211_hdr *hdr = (void *)skb->data;
b2e7771e 61
4c298677
JB		 62 if (status->flag & (RX_FLAG_FAILED_FCS_CRC |
63 RX_FLAG_FAILED_PLCP_CRC |
64 RX_FLAG_AMPDU_IS_ZEROLEN))
6b59db7d
ZG		 65 return true;
66
0059b2b1 67 if (unlikely(skb->len < 16 + present_fcs_len))
6b59db7d
ZG		 68 return true;
69
87228f57
HH		 70 if (ieee80211_is_ctl(hdr->frame_control) &&
71 !ieee80211_is_pspoll(hdr->frame_control) &&
72 !ieee80211_is_back_req(hdr->frame_control))
6b59db7d
ZG		 73 return true;
74
75 return false;
b2e7771e
JB		 76}
77
601ae7f2 78static int
90b9e446
JB		 79ieee80211_rx_radiotap_space(struct ieee80211_local *local,
80 struct ieee80211_rx_status *status)
601ae7f2
BR		 81{
82 int len;
83
84 /* always present fields */
a144f378 85 len = sizeof(struct ieee80211_radiotap_header) + 8;
601ae7f2 86
a144f378 87 /* allocate extra bitmaps */
a144f378
JB		 88 if (status->chains)
89 len += 4 * hweight8(status->chains);
90b9e446
JB		 90
91 if (ieee80211_have_rx_timestamp(status)) {
92 len = ALIGN(len, 8);
601ae7f2 93 len += 8;
90b9e446 94 }
7fee5372 95 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
601ae7f2 96 len += 1;
601ae7f2 97
a144f378
JB		 98 /* antenna field, if we don't have per-chain info */
99 if (!status->chains)
100 len += 1;
101
90b9e446
JB		 102 /* padding for RX_FLAGS if necessary */
103 len = ALIGN(len, 2);
601ae7f2 104
6d744bac
JB		 105 if (status->flag & RX_FLAG_HT) /* HT info */
106 len += 3;
107
4c298677 108 if (status->flag & RX_FLAG_AMPDU_DETAILS) {
90b9e446 109 len = ALIGN(len, 4);
4c298677
JB		 110 len += 8;
111 }
112
51648921
JB		 113 if (status->flag & RX_FLAG_VHT) {
114 len = ALIGN(len, 2);
115 len += 12;
116 }
117
a144f378
JB		 118 if (status->chains) {
119 /* antenna and antenna signal fields */
120 len += 2 * hweight8(status->chains);
121 }
122
601ae7f2
BR		 123 return len;
124}
125
00ea6deb 126/*
601ae7f2
BR		 127 * ieee80211_add_rx_radiotap_header - add radiotap header
128 *
129 * add a radiotap header containing all the fields which the hardware provided.
130 */
131static void
132ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
133 struct sk_buff *skb,
601ae7f2 134 struct ieee80211_rate *rate,
973ef21a 135 int rtap_len, bool has_fcs)
601ae7f2 136{
f1d58c25 137 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
601ae7f2
BR		 138 struct ieee80211_radiotap_header *rthdr;
139 unsigned char *pos;
a144f378
JB		 140 __le32 *it_present;
141 u32 it_present_val;
6a86b9c7 142 u16 rx_flags = 0;
a5e70697 143 u16 channel_flags = 0;
a144f378
JB		 144 int mpdulen, chain;
145 unsigned long chains = status->chains;
f4bda337
TP		 146
147 mpdulen = skb->len;
148 if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)))
149 mpdulen += FCS_LEN;
601ae7f2
BR		 150
151 rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len);
152 memset(rthdr, 0, rtap_len);
a144f378 153 it_present = &rthdr->it_present;
601ae7f2
BR		 154
155 /* radiotap header, set always present flags */
0059b2b1 156 rthdr->it_len = cpu_to_le16(rtap_len);
a144f378
JB		 157 it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) |
158 BIT(IEEE80211_RADIOTAP_CHANNEL) |
159 BIT(IEEE80211_RADIOTAP_RX_FLAGS);
160
161 if (!status->chains)
162 it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA);
163
164 for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) {
165 it_present_val |=
166 BIT(IEEE80211_RADIOTAP_EXT) |
167 BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE);
168 put_unaligned_le32(it_present_val, it_present);
169 it_present++;
170 it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) |
171 BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
172 }
601ae7f2 173
a144f378
JB		 174 put_unaligned_le32(it_present_val, it_present);
175
176 pos = (void *)(it_present + 1);
177
601ae7f2
BR		 178 /* the order of the following fields is important */
179
180 /* IEEE80211_RADIOTAP_TSFT */
f4bda337 181 if (ieee80211_have_rx_timestamp(status)) {
90b9e446
JB		 182 /* padding */
183 while ((pos - (u8 *)rthdr) & 7)
184 *pos++ = 0;
f4bda337
TP		 185 put_unaligned_le64(
186 ieee80211_calculate_rx_timestamp(local, status,
187 mpdulen, 0),
188 pos);
1df332e8 189 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT);
601ae7f2
BR		 190 pos += 8;
191 }
192
193 /* IEEE80211_RADIOTAP_FLAGS */
973ef21a 194 if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))
601ae7f2 195 *pos |= IEEE80211_RADIOTAP_F_FCS;
aae89831
JB		 196 if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
197 *pos |= IEEE80211_RADIOTAP_F_BADFCS;
b4f28bbb
BR		 198 if (status->flag & RX_FLAG_SHORTPRE)
199 *pos |= IEEE80211_RADIOTAP_F_SHORTPRE;
601ae7f2
BR		 200 pos++;
201
202 /* IEEE80211_RADIOTAP_RATE */
5614618e 203 if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) {
0fb8ca45 204 /*
f8d1ccf1 205 * Without rate information don't add it. If we have,
38f37be2 206 * MCS information is a separate field in radiotap,
73b48099
JB		 207 * added below. The byte here is needed as padding
208 * for the channel though, so initialise it to 0.
0fb8ca45
JM		 209 */
210 *pos = 0;
8d6f658e 211 } else {
2103dec1 212 int shift = 0;
ebe6c7ba 213 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
2103dec1
SW		 214 if (status->flag & RX_FLAG_10MHZ)
215 shift = 1;
216 else if (status->flag & RX_FLAG_5MHZ)
217 shift = 2;
218 *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift));
8d6f658e 219 }
601ae7f2
BR		 220 pos++;
221
222 /* IEEE80211_RADIOTAP_CHANNEL */
6a86b9c7 223 put_unaligned_le16(status->freq, pos);
601ae7f2 224 pos += 2;
a5e70697
SW		 225 if (status->flag & RX_FLAG_10MHZ)
226 channel_flags |= IEEE80211_CHAN_HALF;
227 else if (status->flag & RX_FLAG_5MHZ)
228 channel_flags |= IEEE80211_CHAN_QUARTER;
229
601ae7f2 230 if (status->band == IEEE80211_BAND_5GHZ)
a5e70697 231 channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ;
5614618e 232 else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT))
a5e70697 233 channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ;
f8d1ccf1 234 else if (rate && rate->flags & IEEE80211_RATE_ERP_G)
a5e70697 235 channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ;
f8d1ccf1 236 else if (rate)
a5e70697 237 channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ;
f8d1ccf1 238 else
a5e70697
SW		 239 channel_flags |= IEEE80211_CHAN_2GHZ;
240 put_unaligned_le16(channel_flags, pos);
601ae7f2
BR		 241 pos += 2;
242
243 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
fe8431f8
FF		 244 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM &&
245 !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
601ae7f2
BR		 246 *pos = status->signal;
247 rthdr->it_present |=
248 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
249 pos++;
250 }
251
601ae7f2
BR		 252 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
253
a144f378
JB		 254 if (!status->chains) {
255 /* IEEE80211_RADIOTAP_ANTENNA */
256 *pos = status->antenna;
257 pos++;
258 }
601ae7f2 259
601ae7f2
BR		 260 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
261
262 /* IEEE80211_RADIOTAP_RX_FLAGS */
263 /* ensure 2 byte alignment for the 2 byte field as required */
6a86b9c7 264 if ((pos - (u8 *)rthdr) & 1)
90b9e446 265 *pos++ = 0;
aae89831 266 if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
6a86b9c7
JB		 267 rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP;
268 put_unaligned_le16(rx_flags, pos);
601ae7f2 269 pos += 2;
6d744bac
JB		 270
271 if (status->flag & RX_FLAG_HT) {
786677d1
OR		 272 unsigned int stbc;
273
6d744bac 274 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
ac55d2fe 275 *pos++ = local->hw.radiotap_mcs_details;
6d744bac
JB		 276 *pos = 0;
277 if (status->flag & RX_FLAG_SHORT_GI)
278 *pos |= IEEE80211_RADIOTAP_MCS_SGI;
279 if (status->flag & RX_FLAG_40MHZ)
280 *pos |= IEEE80211_RADIOTAP_MCS_BW_40;
ac55d2fe
JB		 281 if (status->flag & RX_FLAG_HT_GF)
282 *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF;
63c361f5
EG		 283 if (status->flag & RX_FLAG_LDPC)
284 *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC;
786677d1
OR		 285 stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT;
286 *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT;
6d744bac
JB		 287 pos++;
288 *pos++ = status->rate_idx;
289 }
4c298677
JB		 290
291 if (status->flag & RX_FLAG_AMPDU_DETAILS) {
292 u16 flags = 0;
293
294 /* ensure 4 byte alignment */
295 while ((pos - (u8 *)rthdr) & 3)
296 pos++;
297 rthdr->it_present |=
298 cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS);
299 put_unaligned_le32(status->ampdu_reference, pos);
300 pos += 4;
301 if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN)
302 flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN;
303 if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN)
304 flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN;
305 if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN)
306 flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN;
307 if (status->flag & RX_FLAG_AMPDU_IS_LAST)
308 flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST;
309 if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR)
310 flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR;
311 if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
312 flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN;
313 put_unaligned_le16(flags, pos);
314 pos += 2;
315 if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
316 *pos++ = status->ampdu_delimiter_crc;
317 else
318 *pos++ = 0;
319 *pos++ = 0;
320 }
90b9e446 321
51648921
JB		 322 if (status->flag & RX_FLAG_VHT) {
323 u16 known = local->hw.radiotap_vht_details;
324
325 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
326 /* known field - how to handle 80+80? */
1b8d242a 327 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
51648921
JB		 328 known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
329 put_unaligned_le16(known, pos);
330 pos += 2;
331 /* flags */
332 if (status->flag & RX_FLAG_SHORT_GI)
333 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
63c361f5
EG		 334 /* in VHT, STBC is binary */
335 if (status->flag & RX_FLAG_STBC_MASK)
336 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC;
fb378c23
EG		 337 if (status->vht_flag & RX_VHT_FLAG_BF)
338 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED;
51648921
JB		 339 pos++;
340 /* bandwidth */
1b8d242a 341 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
51648921 342 *pos++ = 4;
1b8d242a 343 else if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
51648921 344 *pos++ = 0; /* marked not known above */
1b8d242a 345 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
51648921
JB		 346 *pos++ = 11;
347 else if (status->flag & RX_FLAG_40MHZ)
348 *pos++ = 1;
349 else /* 20 MHz */
350 *pos++ = 0;
351 /* MCS/NSS */
352 *pos = (status->rate_idx << 4) | status->vht_nss;
353 pos += 4;
354 /* coding field */
63c361f5
EG		 355 if (status->flag & RX_FLAG_LDPC)
356 *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0;
51648921
JB		 357 pos++;
358 /* group ID */
359 pos++;
360 /* partial_aid */
361 pos += 2;
362 }
363
a144f378
JB		 364 for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) {
365 *pos++ = status->chain_signal[chain];
366 *pos++ = chain;
367 }
601ae7f2
BR		 368}
369
b2e7771e
JB		 370/*
371 * This function copies a received frame to all monitor interfaces and
372 * returns a cleaned-up SKB that no longer includes the FCS nor the
373 * radiotap header the driver might have added.
374 */
375static struct sk_buff *
376ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
8318d78a 377 struct ieee80211_rate *rate)
b2e7771e 378{
f1d58c25 379 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb);
b2e7771e 380 struct ieee80211_sub_if_data *sdata;
293702a3 381 int needed_headroom;
b2e7771e
JB		 382 struct sk_buff *skb, *skb2;
383 struct net_device *prev_dev = NULL;
384 int present_fcs_len = 0;
b2e7771e
JB		 385
386 /*
387 * First, we may need to make a copy of the skb because
388 * (1) we need to modify it for radiotap (if not present), and
389 * (2) the other RX handlers will modify the skb we got.
390 *
391 * We don't need to, of course, if we aren't going to return
392 * the SKB because it has a bad FCS/PLCP checksum.
393 */
0869aea0 394
b2e7771e
JB		 395 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
396 present_fcs_len = FCS_LEN;
397
0059b2b1
EG		 398 /* ensure hdr->frame_control is in skb head */
399 if (!pskb_may_pull(origskb, 2)) {
e3cf8b3f
ZY		 400 dev_kfree_skb(origskb);
401 return NULL;
402 }
403
b2e7771e 404 if (!local->monitors) {
0869aea0 405 if (should_drop_frame(origskb, present_fcs_len)) {
b2e7771e
JB		 406 dev_kfree_skb(origskb);
407 return NULL;
408 }
409
0869aea0 410 return remove_monitor_info(local, origskb);
b2e7771e
JB		 411 }
412
751413ea
HS		 413 /* room for the radiotap header based on driver features */
414 needed_headroom = ieee80211_rx_radiotap_space(local, status);
415
0869aea0 416 if (should_drop_frame(origskb, present_fcs_len)) {
b2e7771e
JB		 417 /* only need to expand headroom if necessary */
418 skb = origskb;
419 origskb = NULL;
420
421 /*
422 * This shouldn't trigger often because most devices have an
423 * RX header they pull before we get here, and that should
424 * be big enough for our radiotap information. We should
425 * probably export the length to drivers so that we can have
426 * them allocate enough headroom to start with.
427 */
428 if (skb_headroom(skb) < needed_headroom &&
c49e5ea3 429 pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) {
b2e7771e
JB		 430 dev_kfree_skb(skb);
431 return NULL;
432 }
433 } else {
434 /*
435 * Need to make a copy and possibly remove radiotap header
436 * and FCS from the original.
437 */
438 skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC);
439
0869aea0 440 origskb = remove_monitor_info(local, origskb);
b2e7771e
JB		 441
442 if (!skb)
443 return origskb;
444 }
445
0869aea0 446 /* prepend radiotap information */
973ef21a
FF		 447 ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom,
448 true);
b2e7771e 449
ce3edf6d 450 skb_reset_mac_header(skb);
b2e7771e
JB		 451 skb->ip_summed = CHECKSUM_UNNECESSARY;
452 skb->pkt_type = PACKET_OTHERHOST;
453 skb->protocol = htons(ETH_P_802_2);
454
455 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
05c914fe 456 if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
b2e7771e
JB		 457 continue;
458
3d30d949
MW		 459 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)
460 continue;
461
9607e6b6 462 if (!ieee80211_sdata_running(sdata))
47846c9b
JB		 463 continue;
464
b2e7771e
JB		 465 if (prev_dev) {
466 skb2 = skb_clone(skb, GFP_ATOMIC);
467 if (skb2) {
468 skb2->dev = prev_dev;
5548a8a1 469 netif_receive_skb(skb2);
b2e7771e
JB		 470 }
471 }
472
473 prev_dev = sdata->dev;
474 sdata->dev->stats.rx_packets++;
475 sdata->dev->stats.rx_bytes += skb->len;
476 }
477
478 if (prev_dev) {
479 skb->dev = prev_dev;
5548a8a1 480 netif_receive_skb(skb);
b2e7771e
JB		 481 } else
482 dev_kfree_skb(skb);
483
484 return origskb;
485}
486
5cf121c3 487static void ieee80211_parse_qos(struct ieee80211_rx_data *rx)
6e0d114d 488{
238f74a2 489 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
554891e6 490 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
9e26297a 491 int tid, seqno_idx, security_idx;
6e0d114d
JB		 492
493 /* does the frame have a qos control field? */
238f74a2
HH		 494 if (ieee80211_is_data_qos(hdr->frame_control)) {
495 u8 *qc = ieee80211_get_qos_ctl(hdr);
6e0d114d 496 /* frame has qos control */
238f74a2 497 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
04b7dcf9 498 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
554891e6 499 status->rx_flags |= IEEE80211_RX_AMSDU;
9e26297a
JB		 500
501 seqno_idx = tid;
502 security_idx = tid;
6e0d114d 503 } else {
1411f9b5
JB		 504 /*
505 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
506 *
507 * Sequence numbers for management frames, QoS data
508 * frames with a broadcast/multicast address in the
509 * Address 1 field, and all non-QoS data frames sent
510 * by QoS STAs are assigned using an additional single
511 * modulo-4096 counter, [...]
512 *
513 * We also use that counter for non-QoS STAs.
514 */
5a306f58 515 seqno_idx = IEEE80211_NUM_TIDS;
9e26297a
JB		 516 security_idx = 0;
517 if (ieee80211_is_mgmt(hdr->frame_control))
5a306f58 518 security_idx = IEEE80211_NUM_TIDS;
9e26297a 519 tid = 0;
6e0d114d 520 }
52865dfd 521
9e26297a
JB		 522 rx->seqno_idx = seqno_idx;
523 rx->security_idx = security_idx;
6e0d114d
JB		 524 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
525 * For now, set skb->priority to 0 for other cases. */
526 rx->skb->priority = (tid > 7) ? 0 : tid;
38f3714d 527}
6e0d114d 528
d1c3a37c
JB		 529/**
530 * DOC: Packet alignment
531 *
532 * Drivers always need to pass packets that are aligned to two-byte boundaries
533 * to the stack.
534 *
535 * Additionally, should, if possible, align the payload data in a way that
536 * guarantees that the contained IP header is aligned to a four-byte
537 * boundary. In the case of regular frames, this simply means aligning the
538 * payload to a four-byte boundary (because either the IP header is directly
539 * contained, or IV/RFC1042 headers that have a length divisible by four are
59d9cb07
KV		 540 * in front of it). If the payload data is not properly aligned and the
541 * architecture doesn't support efficient unaligned operations, mac80211
542 * will align the data.
d1c3a37c
JB		 543 *
544 * With A-MSDU frames, however, the payload data address must yield two modulo
545 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
546 * push the IP header further back to a multiple of four again. Thankfully, the
547 * specs were sane enough this time around to require padding each A-MSDU
548 * subframe to a length that is a multiple of four.
549 *
25985edc 550 * Padding like Atheros hardware adds which is between the 802.11 header and
d1c3a37c
JB		 551 * the payload is not supported, the driver is required to move the 802.11
552 * header to be directly in front of the payload in that case.
553 */
554static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx)
38f3714d 555{
59d9cb07
KV		 556#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
557 WARN_ONCE((unsigned long)rx->skb->data & 1,
558 "unaligned packet at 0x%p\n", rx->skb->data);
d1c3a37c 559#endif
6e0d114d
JB		 560}
561
6368e4b1 562
571ecf67
JB		 563/* rx handlers */
564
3cfcf6ac
JM		 565static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb)
566{
567 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
568
d8ca16db 569 if (is_multicast_ether_addr(hdr->addr1))
3cfcf6ac
JM		 570 return 0;
571
d8ca16db 572 return ieee80211_is_robust_mgmt_frame(skb);
3cfcf6ac
JM		 573}
574
575
576static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb)
577{
578 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
579
d8ca16db 580 if (!is_multicast_ether_addr(hdr->addr1))
3cfcf6ac
JM		 581 return 0;
582
d8ca16db 583 return ieee80211_is_robust_mgmt_frame(skb);
3cfcf6ac
JM		 584}
585
586
587/* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
588static int ieee80211_get_mmie_keyidx(struct sk_buff *skb)
589{
590 struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data;
591 struct ieee80211_mmie *mmie;
592
1df332e8 593 if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da))
3cfcf6ac
JM		 594 return -1;
595
d8ca16db 596 if (!ieee80211_is_robust_mgmt_frame(skb))
3cfcf6ac
JM		 597 return -1; /* not a robust management frame */
598
599 mmie = (struct ieee80211_mmie *)
600 (skb->data + skb->len - sizeof(*mmie));
601 if (mmie->element_id != WLAN_EID_MMIE ||
602 mmie->length != sizeof(*mmie) - 2)
603 return -1;
604
605 return le16_to_cpu(mmie->key_id);
606}
607
2475b1cc
MS		 608static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs,
609 struct sk_buff *skb)
610{
611 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
612 __le16 fc;
613 int hdrlen;
614 u8 keyid;
615
616 fc = hdr->frame_control;
617 hdrlen = ieee80211_hdrlen(fc);
618
619 if (skb->len < hdrlen + cs->hdr_len)
620 return -EINVAL;
621
622 skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1);
623 keyid &= cs->key_idx_mask;
624 keyid >>= cs->key_idx_shift;
625
626 return keyid;
627}
628
1df332e8 629static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
33b64eb2 630{
a7767f95 631 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
47846c9b 632 char *dev_addr = rx->sdata->vif.addr;
d6d1a5a7 633
a7767f95 634 if (ieee80211_is_data(hdr->frame_control)) {
3c5772a5
JC		 635 if (is_multicast_ether_addr(hdr->addr1)) {
636 if (ieee80211_has_tods(hdr->frame_control) ||
1df332e8 637 !ieee80211_has_fromds(hdr->frame_control))
3c5772a5 638 return RX_DROP_MONITOR;
b203ca39 639 if (ether_addr_equal(hdr->addr3, dev_addr))
3c5772a5
JC		 640 return RX_DROP_MONITOR;
641 } else {
642 if (!ieee80211_has_a4(hdr->frame_control))
643 return RX_DROP_MONITOR;
b203ca39 644 if (ether_addr_equal(hdr->addr4, dev_addr))
3c5772a5
JC		 645 return RX_DROP_MONITOR;
646 }
33b64eb2
LCC		 647 }
648
649 /* If there is not an established peer link and this is not a peer link
650 * establisment frame, beacon or probe, drop the frame.
651 */
652
57cf8043 653 if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) {
33b64eb2 654 struct ieee80211_mgmt *mgmt;
d6d1a5a7 655
a7767f95 656 if (!ieee80211_is_mgmt(hdr->frame_control))
33b64eb2
LCC		 657 return RX_DROP_MONITOR;
658
a7767f95 659 if (ieee80211_is_action(hdr->frame_control)) {
d3aaec8a 660 u8 category;
9b395bc3
JB		 661
662 /* make sure category field is present */
663 if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE)
664 return RX_DROP_MONITOR;
665
33b64eb2 666 mgmt = (struct ieee80211_mgmt *)hdr;
d3aaec8a
JC		 667 category = mgmt->u.action.category;
668 if (category != WLAN_CATEGORY_MESH_ACTION &&
1df332e8 669 category != WLAN_CATEGORY_SELF_PROTECTED)
33b64eb2 670 return RX_DROP_MONITOR;
33b64eb2 671 return RX_CONTINUE;
33b64eb2
LCC		 672 }
673
a7767f95
HH		 674 if (ieee80211_is_probe_req(hdr->frame_control) ||
675 ieee80211_is_probe_resp(hdr->frame_control) ||
71839121
JC		 676 ieee80211_is_beacon(hdr->frame_control) ||
677 ieee80211_is_auth(hdr->frame_control))
a7767f95
HH		 678 return RX_CONTINUE;
679
680 return RX_DROP_MONITOR;
a7767f95
HH		 681 }
682
902acc78
JB		 683 return RX_CONTINUE;
684}
33b64eb2 685
d3b2fb53 686static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata,
1edfb1af 687 struct tid_ampdu_rx *tid_agg_rx,
f9e124fb
CL		 688 int index,
689 struct sk_buff_head *frames)
1edfb1af 690{
83eb935e
MK		 691 struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index];
692 struct sk_buff *skb;
4cfda47b 693 struct ieee80211_rx_status *status;
1edfb1af 694
dd318575
JB		 695 lockdep_assert_held(&tid_agg_rx->reorder_lock);
696
83eb935e 697 if (skb_queue_empty(skb_list))
1edfb1af
JB		 698 goto no_frame;
699
83eb935e
MK		 700 if (!ieee80211_rx_reorder_ready(skb_list)) {
701 __skb_queue_purge(skb_list);
702 goto no_frame;
703 }
704
705 /* release frames from the reorder ring buffer */
1edfb1af 706 tid_agg_rx->stored_mpdu_num--;
83eb935e
MK		 707 while ((skb = __skb_dequeue(skb_list))) {
708 status = IEEE80211_SKB_RXCB(skb);
709 status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE;
710 __skb_queue_tail(frames, skb);
711 }
1edfb1af
JB		 712
713no_frame:
9a886586 714 tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num);
1edfb1af
JB		 715}
716
d3b2fb53 717static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata,
1edfb1af 718 struct tid_ampdu_rx *tid_agg_rx,
f9e124fb
CL		 719 u16 head_seq_num,
720 struct sk_buff_head *frames)
1edfb1af
JB		 721{
722 int index;
723
dd318575
JB		 724 lockdep_assert_held(&tid_agg_rx->reorder_lock);
725
9a886586 726 while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) {
2e3049b7 727 index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
f9e124fb
CL		 728 ieee80211_release_reorder_frame(sdata, tid_agg_rx, index,
729 frames);
1edfb1af
JB		 730 }
731}
732
733/*
734 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
735 * the skb was added to the buffer longer than this time ago, the earlier
736 * frames that have not yet been received are assumed to be lost and the skb
737 * can be released for processing. This may also release other skb's from the
738 * reorder buffer if there are no additional gaps between the frames.
2bff8ebf
CL		 739 *
740 * Callers must hold tid_agg_rx->reorder_lock.
1edfb1af
JB		 741 */
742#define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
743
d3b2fb53 744static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata,
f9e124fb
CL		 745 struct tid_ampdu_rx *tid_agg_rx,
746 struct sk_buff_head *frames)
aa0c8636 747{
83eb935e 748 int index, i, j;
aa0c8636 749
dd318575
JB		 750 lockdep_assert_held(&tid_agg_rx->reorder_lock);
751
aa0c8636 752 /* release the buffer until next missing frame */
2e3049b7 753 index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
83eb935e 754 if (!ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index]) &&
07ae2dfc 755 tid_agg_rx->stored_mpdu_num) {
aa0c8636
CL		 756 /*
757 * No buffers ready to be released, but check whether any
758 * frames in the reorder buffer have timed out.
759 */
aa0c8636
CL		 760 int skipped = 1;
761 for (j = (index + 1) % tid_agg_rx->buf_size; j != index;
762 j = (j + 1) % tid_agg_rx->buf_size) {
83eb935e
MK		 763 if (!ieee80211_rx_reorder_ready(
764 &tid_agg_rx->reorder_buf[j])) {
aa0c8636
CL		 765 skipped++;
766 continue;
767 }
499fe9a4
DH		 768 if (skipped &&
769 !time_after(jiffies, tid_agg_rx->reorder_time[j] +
aa0c8636 770 HT_RX_REORDER_BUF_TIMEOUT))
2bff8ebf 771 goto set_release_timer;
aa0c8636 772
83eb935e
MK		 773 /* don't leave incomplete A-MSDUs around */
774 for (i = (index + 1) % tid_agg_rx->buf_size; i != j;
775 i = (i + 1) % tid_agg_rx->buf_size)
776 __skb_queue_purge(&tid_agg_rx->reorder_buf[i]);
777
bdcbd8e0
JB		 778 ht_dbg_ratelimited(sdata,
779 "release an RX reorder frame due to timeout on earlier frames\n");
f9e124fb
CL		 780 ieee80211_release_reorder_frame(sdata, tid_agg_rx, j,
781 frames);
aa0c8636
CL		 782
783 /*
784 * Increment the head seq# also for the skipped slots.
785 */
786 tid_agg_rx->head_seq_num =
9a886586
JB		 787 (tid_agg_rx->head_seq_num +
788 skipped) & IEEE80211_SN_MASK;
aa0c8636
CL		 789 skipped = 0;
790 }
83eb935e
MK		 791 } else while (ieee80211_rx_reorder_ready(
792 &tid_agg_rx->reorder_buf[index])) {
f9e124fb
CL		 793 ieee80211_release_reorder_frame(sdata, tid_agg_rx, index,
794 frames);
2e3049b7 795 index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
aa0c8636 796 }
2bff8ebf
CL		 797
798 if (tid_agg_rx->stored_mpdu_num) {
2e3049b7 799 j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
2bff8ebf
CL		 800
801 for (; j != (index - 1) % tid_agg_rx->buf_size;
802 j = (j + 1) % tid_agg_rx->buf_size) {
83eb935e
MK		 803 if (ieee80211_rx_reorder_ready(
804 &tid_agg_rx->reorder_buf[j]))
2bff8ebf
CL		 805 break;
806 }
807
808 set_release_timer:
809
810 mod_timer(&tid_agg_rx->reorder_timer,
334df731 811 tid_agg_rx->reorder_time[j] + 1 +
2bff8ebf
CL		 812 HT_RX_REORDER_BUF_TIMEOUT);
813 } else {
814 del_timer(&tid_agg_rx->reorder_timer);
815 }
aa0c8636
CL		 816}
817
1edfb1af
JB		 818/*
819 * As this function belongs to the RX path it must be under
820 * rcu_read_lock protection. It returns false if the frame
821 * can be processed immediately, true if it was consumed.
822 */
d3b2fb53 823static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata,
1edfb1af 824 struct tid_ampdu_rx *tid_agg_rx,
f9e124fb
CL		 825 struct sk_buff *skb,
826 struct sk_buff_head *frames)
1edfb1af
JB		 827{
828 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
83eb935e 829 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1edfb1af
JB		 830 u16 sc = le16_to_cpu(hdr->seq_ctrl);
831 u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
832 u16 head_seq_num, buf_size;
833 int index;
2bff8ebf 834 bool ret = true;
1edfb1af 835
dd318575
JB		 836 spin_lock(&tid_agg_rx->reorder_lock);
837
4549cf2b
MK		 838 /*
839 * Offloaded BA sessions have no known starting sequence number so pick
840 * one from first Rxed frame for this tid after BA was started.
841 */
842 if (unlikely(tid_agg_rx->auto_seq)) {
843 tid_agg_rx->auto_seq = false;
844 tid_agg_rx->ssn = mpdu_seq_num;
845 tid_agg_rx->head_seq_num = mpdu_seq_num;
846 }
847
1edfb1af
JB		 848 buf_size = tid_agg_rx->buf_size;
849 head_seq_num = tid_agg_rx->head_seq_num;
850
851 /* frame with out of date sequence number */
9a886586 852 if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) {
1edfb1af 853 dev_kfree_skb(skb);
2bff8ebf 854 goto out;
1edfb1af
JB		 855 }
856
857 /*
858 * If frame the sequence number exceeds our buffering window
859 * size release some previous frames to make room for this one.
860 */
9a886586
JB		 861 if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) {
862 head_seq_num = ieee80211_sn_inc(
863 ieee80211_sn_sub(mpdu_seq_num, buf_size));
1edfb1af 864 /* release stored frames up to new head to stack */
d3b2fb53 865 ieee80211_release_reorder_frames(sdata, tid_agg_rx,
f9e124fb 866 head_seq_num, frames);
1edfb1af
JB		 867 }
868
869 /* Now the new frame is always in the range of the reordering buffer */
870
2e3049b7 871 index = mpdu_seq_num % tid_agg_rx->buf_size;
1edfb1af
JB		 872
873 /* check if we already stored this frame */
83eb935e 874 if (ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index])) {
1edfb1af 875 dev_kfree_skb(skb);
2bff8ebf 876 goto out;
1edfb1af
JB		 877 }
878
879 /*
880 * If the current MPDU is in the right order and nothing else
881 * is stored we can process it directly, no need to buffer it.
c835b214
JB		 882 * If it is first but there's something stored, we may be able
883 * to release frames after this one.
1edfb1af
JB		 884 */
885 if (mpdu_seq_num == tid_agg_rx->head_seq_num &&
886 tid_agg_rx->stored_mpdu_num == 0) {
83eb935e
MK		 887 if (!(status->flag & RX_FLAG_AMSDU_MORE))
888 tid_agg_rx->head_seq_num =
889 ieee80211_sn_inc(tid_agg_rx->head_seq_num);
2bff8ebf
CL		 890 ret = false;
891 goto out;
1edfb1af
JB		 892 }
893
894 /* put the frame in the reordering buffer */
83eb935e
MK		 895 __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb);
896 if (!(status->flag & RX_FLAG_AMSDU_MORE)) {
897 tid_agg_rx->reorder_time[index] = jiffies;
898 tid_agg_rx->stored_mpdu_num++;
899 ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames);
900 }
1edfb1af 901
2bff8ebf
CL		 902 out:
903 spin_unlock(&tid_agg_rx->reorder_lock);
904 return ret;
1edfb1af
JB		 905}
906
907/*
908 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
909 * true if the MPDU was buffered, false if it should be processed.
910 */
f9e124fb
CL		 911static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx,
912 struct sk_buff_head *frames)
1edfb1af 913{
2569a826
JB		 914 struct sk_buff *skb = rx->skb;
915 struct ieee80211_local *local = rx->local;
1edfb1af 916 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
660c6a44 917 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
2569a826 918 struct sta_info *sta = rx->sta;
1edfb1af
JB		 919 struct tid_ampdu_rx *tid_agg_rx;
920 u16 sc;
6cc00d54 921 u8 tid, ack_policy;
1edfb1af 922
051a41fa
JB		 923 if (!ieee80211_is_data_qos(hdr->frame_control) ||
924 is_multicast_ether_addr(hdr->addr1))
2569a826 925 goto dont_reorder;
1edfb1af
JB		 926
927 /*
928 * filter the QoS data rx stream according to
929 * STA/TID and check if this STA/TID is on aggregation
930 */
931
1edfb1af 932 if (!sta)
2569a826 933 goto dont_reorder;
1edfb1af 934
6cc00d54
TP		 935 ack_policy = *ieee80211_get_qos_ctl(hdr) &
936 IEEE80211_QOS_CTL_ACK_POLICY_MASK;
1edfb1af
JB		 937 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
938
a87f736d
JB		 939 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
940 if (!tid_agg_rx)
941 goto dont_reorder;
1edfb1af
JB		 942
943 /* qos null data frames are excluded */
944 if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC)))
a87f736d 945 goto dont_reorder;
1edfb1af 946
6cc00d54
TP		 947 /* not part of a BA session */
948 if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK &&
949 ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL)
950 goto dont_reorder;
951
660c6a44
TP		 952 /* not actually part of this BA session */
953 if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
954 goto dont_reorder;
955
1edfb1af
JB		 956 /* new, potentially un-ordered, ampdu frame - process it */
957
958 /* reset session timer */
959 if (tid_agg_rx->timeout)
12d3952f 960 tid_agg_rx->last_rx = jiffies;
1edfb1af
JB		 961
962 /* if this mpdu is fragmented - terminate rx aggregation session */
963 sc = le16_to_cpu(hdr->seq_ctrl);
964 if (sc & IEEE80211_SCTL_FRAG) {
c1475ca9 965 skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME;
344eec67
JB		 966 skb_queue_tail(&rx->sdata->skb_queue, skb);
967 ieee80211_queue_work(&local->hw, &rx->sdata->work);
2569a826 968 return;
1edfb1af
JB		 969 }
970
a87f736d
JB		 971 /*
972 * No locking needed -- we will only ever process one
973 * RX packet at a time, and thus own tid_agg_rx. All
974 * other code manipulating it needs to (and does) make
975 * sure that we cannot get to it any more before doing
976 * anything with it.
977 */
f9e124fb
CL		 978 if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb,
979 frames))
2569a826
JB		 980 return;
981
982 dont_reorder:
f9e124fb 983 __skb_queue_tail(frames, skb);
1edfb1af 984}
33b64eb2 985
49461622 986static ieee80211_rx_result debug_noinline
5cf121c3 987ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
571ecf67 988{
a7767f95 989 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
554891e6 990 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
571ecf67 991
6b0f3274
JB		 992 /*
993 * Drop duplicate 802.11 retransmissions
994 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
995 */
996 if (rx->skb->len >= 24 && rx->sta &&
997 !ieee80211_is_ctl(hdr->frame_control) &&
998 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
999 !is_multicast_ether_addr(hdr->addr1)) {
a7767f95 1000 if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
9e26297a 1001 rx->sta->last_seq_ctrl[rx->seqno_idx] ==
571ecf67 1002 hdr->seq_ctrl)) {
554891e6 1003 if (status->rx_flags & IEEE80211_RX_RA_MATCH) {
571ecf67
JB		 1004 rx->local->dot11FrameDuplicateCount++;
1005 rx->sta->num_duplicates++;
1006 }
b1f93314 1007 return RX_DROP_UNUSABLE;
0cfcefef 1008 } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) {
9e26297a 1009 rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl;
0cfcefef 1010 }
571ecf67
JB		 1011 }
1012
571ecf67
JB		 1013 if (unlikely(rx->skb->len < 16)) {
1014 I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
e4c26add 1015 return RX_DROP_MONITOR;
571ecf67
JB		 1016 }
1017
571ecf67
JB		 1018 /* Drop disallowed frame classes based on STA auth/assoc state;
1019 * IEEE 802.11, Chap 5.5.
1020 *
ccd7b362
JB		 1021 * mac80211 filters only based on association state, i.e. it drops
1022 * Class 3 frames from not associated stations. hostapd sends
571ecf67
JB		 1023 * deauth/disassoc frames when needed. In addition, hostapd is
1024 * responsible for filtering on both auth and assoc states.
1025 */
33b64eb2 1026
902acc78 1027 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
33b64eb2 1028 return ieee80211_rx_mesh_check(rx);
33b64eb2 1029
a7767f95
HH		 1030 if (unlikely((ieee80211_is_data(hdr->frame_control) ||
1031 ieee80211_is_pspoll(hdr->frame_control)) &&
05c914fe 1032 rx->sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1be7fe8d 1033 rx->sdata->vif.type != NL80211_IFTYPE_WDS &&
c2c98fde 1034 (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) {
7852e361
JB		 1035 /*
1036 * accept port control frames from the AP even when it's not
1037 * yet marked ASSOC to prevent a race where we don't set the
1038 * assoc bit quickly enough before it sends the first frame
1039 */
1040 if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
2a33bee2 1041 ieee80211_is_data_present(hdr->frame_control)) {
6dbda2d0
JB		 1042 unsigned int hdrlen;
1043 __be16 ethertype;
1044
1045 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1046
1047 if (rx->skb->len < hdrlen + 8)
1048 return RX_DROP_MONITOR;
1049
1050 skb_copy_bits(rx->skb, hdrlen + 6, &ethertype, 2);
1051 if (ethertype == rx->sdata->control_port_protocol)
2a33bee2
GE		 1052 return RX_CONTINUE;
1053 }
21fc7560
JB		 1054
1055 if (rx->sdata->vif.type == NL80211_IFTYPE_AP &&
1056 cfg80211_rx_spurious_frame(rx->sdata->dev,
1057 hdr->addr2,
1058 GFP_ATOMIC))
1059 return RX_DROP_UNUSABLE;
1060
e4c26add 1061 return RX_DROP_MONITOR;
2a33bee2 1062 }
571ecf67 1063
9ae54c84 1064 return RX_CONTINUE;
570bd537
JB		 1065}
1066
1067
572e0012
KV		 1068static ieee80211_rx_result debug_noinline
1069ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx)
1070{
1071 struct ieee80211_local *local;
1072 struct ieee80211_hdr *hdr;
1073 struct sk_buff *skb;
1074
1075 local = rx->local;
1076 skb = rx->skb;
1077 hdr = (struct ieee80211_hdr *) skb->data;
1078
1079 if (!local->pspolling)
1080 return RX_CONTINUE;
1081
1082 if (!ieee80211_has_fromds(hdr->frame_control))
1083 /* this is not from AP */
1084 return RX_CONTINUE;
1085
1086 if (!ieee80211_is_data(hdr->frame_control))
1087 return RX_CONTINUE;
1088
1089 if (!ieee80211_has_moredata(hdr->frame_control)) {
1090 /* AP has no more frames buffered for us */
1091 local->pspolling = false;
1092 return RX_CONTINUE;
1093 }
1094
1095 /* more data bit is set, let's request a new frame from the AP */
1096 ieee80211_send_pspoll(local, rx->sdata);
1097
1098 return RX_CONTINUE;
1099}
1100
d012a605 1101static void sta_ps_start(struct sta_info *sta)
571ecf67 1102{
133b8226 1103 struct ieee80211_sub_if_data *sdata = sta->sdata;
4571d3bf 1104 struct ieee80211_local *local = sdata->local;
d012a605 1105 struct ps_data *ps;
0795af57 1106
d012a605
MP		 1107 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1108 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1109 ps = &sdata->bss->ps;
1110 else
1111 return;
1112
1113 atomic_inc(&ps->num_sta_ps);
c2c98fde 1114 set_sta_flag(sta, WLAN_STA_PS_STA);
d057e5a3
AN		 1115 if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
1116 drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta);
bdcbd8e0
JB		 1117 ps_dbg(sdata, "STA %pM aid %d enters power save mode\n",
1118 sta->sta.addr, sta->sta.aid);
571ecf67
JB		 1119}
1120
d012a605 1121static void sta_ps_end(struct sta_info *sta)
571ecf67 1122{
bdcbd8e0
JB		 1123 ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n",
1124 sta->sta.addr, sta->sta.aid);
004c872e 1125
c2c98fde 1126 if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
e3685e03
JB		 1127 /*
1128 * Clear the flag only if the other one is still set
1129 * so that the TX path won't start TX'ing new frames
1130 * directly ... In the case that the driver flag isn't
1131 * set ieee80211_sta_ps_deliver_wakeup() will clear it.
1132 */
1133 clear_sta_flag(sta, WLAN_STA_PS_STA);
bdcbd8e0
JB		 1134 ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n",
1135 sta->sta.addr, sta->sta.aid);
af818581
JB		 1136 return;
1137 }
1138
5ac2e350
JB		 1139 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1140 clear_sta_flag(sta, WLAN_STA_PS_STA);
af818581 1141 ieee80211_sta_ps_deliver_wakeup(sta);
571ecf67
JB		 1142}
1143
d057e5a3
AN		 1144int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start)
1145{
1146 struct sta_info *sta_inf = container_of(sta, struct sta_info, sta);
1147 bool in_ps;
1148
1149 WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS));
1150
1151 /* Don't let the same PS state be set twice */
c2c98fde 1152 in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA);
d057e5a3
AN		 1153 if ((start && in_ps) || (!start && !in_ps))
1154 return -EINVAL;
1155
1156 if (start)
d012a605 1157 sta_ps_start(sta_inf);
d057e5a3 1158 else
d012a605 1159 sta_ps_end(sta_inf);
d057e5a3
AN		 1160
1161 return 0;
1162}
1163EXPORT_SYMBOL(ieee80211_sta_ps_transition);
1164
47086fc5
JB		 1165static ieee80211_rx_result debug_noinline
1166ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx)
1167{
1168 struct ieee80211_sub_if_data *sdata = rx->sdata;
1169 struct ieee80211_hdr *hdr = (void *)rx->skb->data;
1170 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
1171 int tid, ac;
1172
1173 if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH))
1174 return RX_CONTINUE;
1175
1176 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1177 sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
1178 return RX_CONTINUE;
1179
1180 /*
1181 * The device handles station powersave, so don't do anything about
1182 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1183 * it to mac80211 since they're handled.)
1184 */
1185 if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS)
1186 return RX_CONTINUE;
1187
1188 /*
1189 * Don't do anything if the station isn't already asleep. In
1190 * the uAPSD case, the station will probably be marked asleep,
1191 * in the PS-Poll case the station must be confused ...
1192 */
c2c98fde 1193 if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA))
47086fc5
JB		 1194 return RX_CONTINUE;
1195
1196 if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) {
c2c98fde
JB		 1197 if (!test_sta_flag(rx->sta, WLAN_STA_SP)) {
1198 if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER))
deeaee19
JB		 1199 ieee80211_sta_ps_deliver_poll_response(rx->sta);
1200 else
c2c98fde 1201 set_sta_flag(rx->sta, WLAN_STA_PSPOLL);
deeaee19 1202 }
47086fc5
JB		 1203
1204 /* Free PS Poll skb here instead of returning RX_DROP that would
1205 * count as an dropped frame. */
1206 dev_kfree_skb(rx->skb);
1207
1208 return RX_QUEUED;
1209 } else if (!ieee80211_has_morefrags(hdr->frame_control) &&
1210 !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
1211 ieee80211_has_pm(hdr->frame_control) &&
1212 (ieee80211_is_data_qos(hdr->frame_control) ||
1213 ieee80211_is_qos_nullfunc(hdr->frame_control))) {
1214 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
1215 ac = ieee802_1d_to_ac[tid & 7];
1216
1217 /*
1218 * If this AC is not trigger-enabled do nothing.
1219 *
1220 * NB: This could/should check a separate bitmap of trigger-
1221 * enabled queues, but for now we only implement uAPSD w/o
1222 * TSPEC changes to the ACs, so they're always the same.
1223 */
1224 if (!(rx->sta->sta.uapsd_queues & BIT(ac)))
1225 return RX_CONTINUE;
1226
1227 /* if we are in a service period, do nothing */
c2c98fde 1228 if (test_sta_flag(rx->sta, WLAN_STA_SP))
47086fc5
JB		 1229 return RX_CONTINUE;
1230
c2c98fde 1231 if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER))
47086fc5
JB		 1232 ieee80211_sta_ps_deliver_uapsd(rx->sta);
1233 else
c2c98fde 1234 set_sta_flag(rx->sta, WLAN_STA_UAPSD);
47086fc5
JB		 1235 }
1236
1237 return RX_CONTINUE;
1238}
1239
49461622 1240static ieee80211_rx_result debug_noinline
5cf121c3 1241ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
571ecf67
JB		 1242{
1243 struct sta_info *sta = rx->sta;
eb9fb5b8
JB		 1244 struct sk_buff *skb = rx->skb;
1245 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1246 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
ef0621e8 1247 int i;
571ecf67
JB		 1248
1249 if (!sta)
9ae54c84 1250 return RX_CONTINUE;
571ecf67 1251
b291ba11
JB		 1252 /*
1253 * Update last_rx only for IBSS packets which are for the current
e584da5e
AQ		 1254 * BSSID and for station already AUTHORIZED to avoid keeping the
1255 * current IBSS network alive in cases where other STAs start
1256 * using different BSSID. This will also give the station another
1257 * chance to restart the authentication/authorization in case
1258 * something went wrong the first time.
b291ba11 1259 */
05c914fe 1260 if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) {
71364716 1261 u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len,
05c914fe 1262 NL80211_IFTYPE_ADHOC);
e584da5e
AQ		 1263 if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) &&
1264 test_sta_flag(sta, WLAN_STA_AUTHORIZED)) {
571ecf67 1265 sta->last_rx = jiffies;
f4ebddf9
HR		 1266 if (ieee80211_is_data(hdr->frame_control) &&
1267 !is_multicast_ether_addr(hdr->addr1)) {
3af6334c
FF		 1268 sta->last_rx_rate_idx = status->rate_idx;
1269 sta->last_rx_rate_flag = status->flag;
1b8d242a 1270 sta->last_rx_rate_vht_flag = status->vht_flag;
5614618e 1271 sta->last_rx_rate_vht_nss = status->vht_nss;
3af6334c
FF		 1272 }
1273 }
b291ba11
JB		 1274 } else if (!is_multicast_ether_addr(hdr->addr1)) {
1275 /*
33b64eb2
LCC		 1276 * Mesh beacons will update last_rx when if they are found to
1277 * match the current local configuration when processed.
571ecf67 1278 */
b291ba11 1279 sta->last_rx = jiffies;
3af6334c
FF		 1280 if (ieee80211_is_data(hdr->frame_control)) {
1281 sta->last_rx_rate_idx = status->rate_idx;
1282 sta->last_rx_rate_flag = status->flag;
b8ff416b 1283 sta->last_rx_rate_vht_flag = status->vht_flag;
5614618e 1284 sta->last_rx_rate_vht_nss = status->vht_nss;
3af6334c 1285 }
571ecf67
JB		 1286 }
1287
554891e6 1288 if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
9ae54c84 1289 return RX_CONTINUE;
571ecf67 1290
3cf335d5
KV		 1291 if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
1292 ieee80211_sta_rx_notify(rx->sdata, hdr);
1293
571ecf67
JB		 1294 sta->rx_fragments++;
1295 sta->rx_bytes += rx->skb->len;
fe8431f8
FF		 1296 if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
1297 sta->last_signal = status->signal;
1298 ewma_add(&sta->avg_signal, -status->signal);
1299 }
571ecf67 1300
ef0621e8
FF		 1301 if (status->chains) {
1302 sta->chains = status->chains;
1303 for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) {
1304 int signal = status->chain_signal[i];
1305
1306 if (!(status->chains & BIT(i)))
1307 continue;
1308
1309 sta->chain_signal_last[i] = signal;
1310 ewma_add(&sta->chain_signal_avg[i], -signal);
1311 }
1312 }
1313
72eaa43a
JB		 1314 /*
1315 * Change STA power saving mode only at the end of a frame
1316 * exchange sequence.
1317 */
d057e5a3
AN		 1318 if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) &&
1319 !ieee80211_has_morefrags(hdr->frame_control) &&
4cfda47b 1320 !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
05c914fe 1321 (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
b4ba544c
JB		 1322 rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1323 /* PM bit is only checked in frames where it isn't reserved,
1324 * in AP mode it's reserved in non-bufferable management frames
1325 * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field)
1326 */
1327 (!ieee80211_is_mgmt(hdr->frame_control) ||
1328 ieee80211_is_bufferable_mmpdu(hdr->frame_control))) {
c2c98fde 1329 if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
b4ba544c 1330 if (!ieee80211_has_pm(hdr->frame_control))
d012a605 1331 sta_ps_end(sta);
72eaa43a
JB		 1332 } else {
1333 if (ieee80211_has_pm(hdr->frame_control))
d012a605 1334 sta_ps_start(sta);
72eaa43a 1335 }
571ecf67
JB		 1336 }
1337
3f52b7e3
MP		 1338 /* mesh power save support */
1339 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
1340 ieee80211_mps_rx_h_sta_process(sta, hdr);
1341
22403def
JB		 1342 /*
1343 * Drop (qos-)data::nullfunc frames silently, since they
1344 * are used only to control station power saving mode.
1345 */
1346 if (ieee80211_is_nullfunc(hdr->frame_control) ||
1347 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
571ecf67 1348 I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
d524215f
FF		 1349
1350 /*
1351 * If we receive a 4-addr nullfunc frame from a STA
e7f4a940
JB		 1352 * that was not moved to a 4-addr STA vlan yet send
1353 * the event to userspace and for older hostapd drop
1354 * the frame to the monitor interface.
d524215f
FF		 1355 */
1356 if (ieee80211_has_a4(hdr->frame_control) &&
1357 (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
1358 (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
e7f4a940
JB		 1359 !rx->sdata->u.vlan.sta))) {
1360 if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT))
1361 cfg80211_rx_unexpected_4addr_frame(
1362 rx->sdata->dev, sta->sta.addr,
1363 GFP_ATOMIC);
d524215f 1364 return RX_DROP_MONITOR;
e7f4a940 1365 }
22403def
JB		 1366 /*
1367 * Update counter and free packet here to avoid
1368 * counting this as a dropped packed.
1369 */
571ecf67
JB		 1370 sta->rx_packets++;
1371 dev_kfree_skb(rx->skb);
9ae54c84 1372 return RX_QUEUED;
571ecf67
JB		 1373 }
1374
9ae54c84 1375 return RX_CONTINUE;
571ecf67
JB		 1376} /* ieee80211_rx_h_sta_process */
1377
86c228a7
JA		 1378static ieee80211_rx_result debug_noinline
1379ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
1380{
1381 struct sk_buff *skb = rx->skb;
1382 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1383 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1384 int keyidx;
1385 int hdrlen;
1386 ieee80211_rx_result result = RX_DROP_UNUSABLE;
1387 struct ieee80211_key *sta_ptk = NULL;
1388 int mmie_keyidx = -1;
1389 __le16 fc;
2475b1cc 1390 const struct ieee80211_cipher_scheme *cs = NULL;
86c228a7
JA		 1391
1392 /*
1393 * Key selection 101
1394 *
1395 * There are four types of keys:
1396 * - GTK (group keys)
1397 * - IGTK (group keys for management frames)
1398 * - PTK (pairwise keys)
1399 * - STK (station-to-station pairwise keys)
1400 *
1401 * When selecting a key, we have to distinguish between multicast
1402 * (including broadcast) and unicast frames, the latter can only
1403 * use PTKs and STKs while the former always use GTKs and IGTKs.
1404 * Unless, of course, actual WEP keys ("pre-RSNA") are used, then
1405 * unicast frames can also use key indices like GTKs. Hence, if we
1406 * don't have a PTK/STK we check the key index for a WEP key.
1407 *
1408 * Note that in a regular BSS, multicast frames are sent by the
1409 * AP only, associated stations unicast the frame to the AP first
1410 * which then multicasts it on their behalf.
1411 *
1412 * There is also a slight problem in IBSS mode: GTKs are negotiated
1413 * with each station, that is something we don't currently handle.
1414 * The spec seems to expect that one negotiates the same key with
1415 * every station but there's no such requirement; VLANs could be
1416 * possible.
1417 */
1418
1419 /*
1420 * No point in finding a key and decrypting if the frame is neither
1421 * addressed to us nor a multicast frame.
1422 */
1423 if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
1424 return RX_CONTINUE;
1425
1426 /* start without a key */
1427 rx->key = NULL;
2475b1cc 1428 fc = hdr->frame_control;
86c228a7 1429
2475b1cc
MS		 1430 if (rx->sta) {
1431 int keyid = rx->sta->ptk_idx;
86c228a7 1432
2475b1cc
MS		 1433 if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) {
1434 cs = rx->sta->cipher_scheme;
1435 keyid = iwl80211_get_cs_keyid(cs, rx->skb);
1436 if (unlikely(keyid < 0))
1437 return RX_DROP_UNUSABLE;
1438 }
1439 sta_ptk = rcu_dereference(rx->sta->ptk[keyid]);
1440 }
86c228a7
JA		 1441
1442 if (!ieee80211_has_protected(fc))
1443 mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb);
1444
1445 if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) {
1446 rx->key = sta_ptk;
1447 if ((status->flag & RX_FLAG_DECRYPTED) &&
1448 (status->flag & RX_FLAG_IV_STRIPPED))
1449 return RX_CONTINUE;
1450 /* Skip decryption if the frame is not protected. */
1451 if (!ieee80211_has_protected(fc))
1452 return RX_CONTINUE;
1453 } else if (mmie_keyidx >= 0) {
1454 /* Broadcast/multicast robust management frame / BIP */
1455 if ((status->flag & RX_FLAG_DECRYPTED) &&
1456 (status->flag & RX_FLAG_IV_STRIPPED))
1457 return RX_CONTINUE;
1458
1459 if (mmie_keyidx < NUM_DEFAULT_KEYS ||
1460 mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
1461 return RX_DROP_MONITOR; /* unexpected BIP keyidx */
1462 if (rx->sta)
1463 rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]);
1464 if (!rx->key)
1465 rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]);
1466 } else if (!ieee80211_has_protected(fc)) {
1467 /*
1468 * The frame was not protected, so skip decryption. However, we
1469 * need to set rx->key if there is a key that could have been
1470 * used so that the frame may be dropped if encryption would
1471 * have been expected.
1472 */
1473 struct ieee80211_key *key = NULL;
1474 struct ieee80211_sub_if_data *sdata = rx->sdata;
1475 int i;
1476
1477 if (ieee80211_is_mgmt(fc) &&
1478 is_multicast_ether_addr(hdr->addr1) &&
1479 (key = rcu_dereference(rx->sdata->default_mgmt_key)))
1480 rx->key = key;
1481 else {
1482 if (rx->sta) {
1483 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
1484 key = rcu_dereference(rx->sta->gtk[i]);
1485 if (key)
1486 break;
1487 }
1488 }
1489 if (!key) {
1490 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
1491 key = rcu_dereference(sdata->keys[i]);
1492 if (key)
1493 break;
1494 }
1495 }
1496 if (key)
1497 rx->key = key;
1498 }
1499 return RX_CONTINUE;
1500 } else {
1501 u8 keyid;
2475b1cc 1502
86c228a7
JA		 1503 /*
1504 * The device doesn't give us the IV so we won't be
1505 * able to look up the key. That's ok though, we
1506 * don't need to decrypt the frame, we just won't
1507 * be able to keep statistics accurate.
1508 * Except for key threshold notifications, should
1509 * we somehow allow the driver to tell us which key
1510 * the hardware used if this flag is set?
1511 */
1512 if ((status->flag & RX_FLAG_DECRYPTED) &&
1513 (status->flag & RX_FLAG_IV_STRIPPED))
1514 return RX_CONTINUE;
1515
1516 hdrlen = ieee80211_hdrlen(fc);
1517
2475b1cc
MS		 1518 if (cs) {
1519 keyidx = iwl80211_get_cs_keyid(cs, rx->skb);
86c228a7 1520
2475b1cc
MS		 1521 if (unlikely(keyidx < 0))
1522 return RX_DROP_UNUSABLE;
1523 } else {
1524 if (rx->skb->len < 8 + hdrlen)
1525 return RX_DROP_UNUSABLE; /* TODO: count this? */
1526 /*
1527 * no need to call ieee80211_wep_get_keyidx,
1528 * it verifies a bunch of things we've done already
1529 */
1530 skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1);
1531 keyidx = keyid >> 6;
1532 }
86c228a7
JA		 1533
1534 /* check per-station GTK first, if multicast packet */
1535 if (is_multicast_ether_addr(hdr->addr1) && rx->sta)
1536 rx->key = rcu_dereference(rx->sta->gtk[keyidx]);
1537
1538 /* if not found, try default key */
1539 if (!rx->key) {
1540 rx->key = rcu_dereference(rx->sdata->keys[keyidx]);
1541
1542 /*
1543 * RSNA-protected unicast frames should always be
1544 * sent with pairwise or station-to-station keys,
1545 * but for WEP we allow using a key index as well.
1546 */
1547 if (rx->key &&
1548 rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 &&
1549 rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 &&
1550 !is_multicast_ether_addr(hdr->addr1))
1551 rx->key = NULL;
1552 }
1553 }
1554
1555 if (rx->key) {
1556 if (unlikely(rx->key->flags & KEY_FLAG_TAINTED))
1557 return RX_DROP_MONITOR;
1558
1559 rx->key->tx_rx_count++;
1560 /* TODO: add threshold stuff again */
1561 } else {
1562 return RX_DROP_MONITOR;
1563 }
1564
1565 switch (rx->key->conf.cipher) {
1566 case WLAN_CIPHER_SUITE_WEP40:
1567 case WLAN_CIPHER_SUITE_WEP104:
1568 result = ieee80211_crypto_wep_decrypt(rx);
1569 break;
1570 case WLAN_CIPHER_SUITE_TKIP:
1571 result = ieee80211_crypto_tkip_decrypt(rx);
1572 break;
1573 case WLAN_CIPHER_SUITE_CCMP:
1574 result = ieee80211_crypto_ccmp_decrypt(rx);
1575 break;
1576 case WLAN_CIPHER_SUITE_AES_CMAC:
1577 result = ieee80211_crypto_aes_cmac_decrypt(rx);
1578 break;
1579 default:
2475b1cc 1580 result = ieee80211_crypto_hw_decrypt(rx);
86c228a7
JA		 1581 }
1582
1583 /* the hdr variable is invalid after the decrypt handlers */
1584
1585 /* either the frame has been decrypted or will be dropped */
1586 status->flag |= RX_FLAG_DECRYPTED;
1587
1588 return result;
1589}
1590
571ecf67
JB		 1591static inline struct ieee80211_fragment_entry *
1592ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
1593 unsigned int frag, unsigned int seq, int rx_queue,
1594 struct sk_buff **skb)
1595{
1596 struct ieee80211_fragment_entry *entry;
571ecf67 1597
571ecf67
JB		 1598 entry = &sdata->fragments[sdata->fragment_next++];
1599 if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
1600 sdata->fragment_next = 0;
1601
bdcbd8e0 1602 if (!skb_queue_empty(&entry->skb_list))
571ecf67 1603 __skb_queue_purge(&entry->skb_list);
571ecf67
JB		 1604
1605 __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
1606 *skb = NULL;
1607 entry->first_frag_time = jiffies;
1608 entry->seq = seq;
1609 entry->rx_queue = rx_queue;
1610 entry->last_frag = frag;
1611 entry->ccmp = 0;
1612 entry->extra_len = 0;
1613
1614 return entry;
1615}
1616
1617static inline struct ieee80211_fragment_entry *
1618ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
b73d70ad 1619 unsigned int frag, unsigned int seq,
571ecf67
JB		 1620 int rx_queue, struct ieee80211_hdr *hdr)
1621{
1622 struct ieee80211_fragment_entry *entry;
1623 int i, idx;
1624
1625 idx = sdata->fragment_next;
1626 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
1627 struct ieee80211_hdr *f_hdr;
571ecf67
JB		 1628
1629 idx--;
1630 if (idx < 0)
1631 idx = IEEE80211_FRAGMENT_MAX - 1;
1632
1633 entry = &sdata->fragments[idx];
1634 if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
1635 entry->rx_queue != rx_queue ||
1636 entry->last_frag + 1 != frag)
1637 continue;
1638
b73d70ad 1639 f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data;
571ecf67 1640
b73d70ad
HH		 1641 /*
1642 * Check ftype and addresses are equal, else check next fragment
1643 */
1644 if (((hdr->frame_control ^ f_hdr->frame_control) &
1645 cpu_to_le16(IEEE80211_FCTL_FTYPE)) ||
b203ca39
JP		 1646 !ether_addr_equal(hdr->addr1, f_hdr->addr1) ||
1647 !ether_addr_equal(hdr->addr2, f_hdr->addr2))
571ecf67
JB		 1648 continue;
1649
ab46623e 1650 if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
571ecf67
JB		 1651 __skb_queue_purge(&entry->skb_list);
1652 continue;
1653 }
1654 return entry;
1655 }
1656
1657 return NULL;
1658}
1659
49461622 1660static ieee80211_rx_result debug_noinline
5cf121c3 1661ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
571ecf67
JB		 1662{
1663 struct ieee80211_hdr *hdr;
1664 u16 sc;
358c8d9d 1665 __le16 fc;
571ecf67
JB		 1666 unsigned int frag, seq;
1667 struct ieee80211_fragment_entry *entry;
1668 struct sk_buff *skb;
554891e6 1669 struct ieee80211_rx_status *status;
571ecf67 1670
b73d70ad 1671 hdr = (struct ieee80211_hdr *)rx->skb->data;
358c8d9d 1672 fc = hdr->frame_control;
f7fbf70e
JC		 1673
1674 if (ieee80211_is_ctl(fc))
1675 return RX_CONTINUE;
1676
571ecf67
JB		 1677 sc = le16_to_cpu(hdr->seq_ctrl);
1678 frag = sc & IEEE80211_SCTL_FRAG;
1679
358c8d9d 1680 if (likely((!ieee80211_has_morefrags(fc) && frag == 0) ||
571ecf67
JB		 1681 is_multicast_ether_addr(hdr->addr1))) {
1682 /* not fragmented */
1683 goto out;
1684 }
1685 I802_DEBUG_INC(rx->local->rx_handlers_fragments);
1686
e3cf8b3f
ZY		 1687 if (skb_linearize(rx->skb))
1688 return RX_DROP_UNUSABLE;
1689
058897a4
AK		 1690 /*
1691 * skb_linearize() might change the skb->data and
1692 * previously cached variables (in this case, hdr) need to
1693 * be refreshed with the new data.
1694 */
1695 hdr = (struct ieee80211_hdr *)rx->skb->data;
571ecf67
JB		 1696 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
1697
1698 if (frag == 0) {
1699 /* This is the first fragment of a new frame. */
1700 entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
9e26297a 1701 rx->seqno_idx, &(rx->skb));
97359d12 1702 if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP &&
358c8d9d 1703 ieee80211_has_protected(fc)) {
9e26297a 1704 int queue = rx->security_idx;
571ecf67
JB		 1705 /* Store CCMP PN so that we can verify that the next
1706 * fragment has a sequential PN value. */
1707 entry->ccmp = 1;
1708 memcpy(entry->last_pn,
9190252c 1709 rx->key->u.ccmp.rx_pn[queue],
4325f6ca 1710 IEEE80211_CCMP_PN_LEN);
571ecf67 1711 }
9ae54c84 1712 return RX_QUEUED;
571ecf67
JB		 1713 }
1714
1715 /* This is a fragment for a frame that should already be pending in
1716 * fragment cache. Add this fragment to the end of the pending entry.
1717 */
9e26297a
JB		 1718 entry = ieee80211_reassemble_find(rx->sdata, frag, seq,
1719 rx->seqno_idx, hdr);
571ecf67
JB		 1720 if (!entry) {
1721 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
e4c26add 1722 return RX_DROP_MONITOR;
571ecf67
JB		 1723 }
1724
1725 /* Verify that MPDUs within one MSDU have sequential PN values.
1726 * (IEEE 802.11i, 8.3.3.4.5) */
1727 if (entry->ccmp) {
1728 int i;
4325f6ca 1729 u8 pn[IEEE80211_CCMP_PN_LEN], *rpn;
9190252c 1730 int queue;
97359d12 1731 if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP)
e4c26add 1732 return RX_DROP_UNUSABLE;
4325f6ca
JB		 1733 memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN);
1734 for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) {
571ecf67
JB		 1735 pn[i]++;
1736 if (pn[i])
1737 break;
1738 }
9e26297a 1739 queue = rx->security_idx;
9190252c 1740 rpn = rx->key->u.ccmp.rx_pn[queue];
4325f6ca 1741 if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN))
e4c26add 1742 return RX_DROP_UNUSABLE;
4325f6ca 1743 memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN);
571ecf67
JB		 1744 }
1745
358c8d9d 1746 skb_pull(rx->skb, ieee80211_hdrlen(fc));
571ecf67
JB		 1747 __skb_queue_tail(&entry->skb_list, rx->skb);
1748 entry->last_frag = frag;
1749 entry->extra_len += rx->skb->len;
358c8d9d 1750 if (ieee80211_has_morefrags(fc)) {
571ecf67 1751 rx->skb = NULL;
9ae54c84 1752 return RX_QUEUED;
571ecf67
JB		 1753 }
1754
1755 rx->skb = __skb_dequeue(&entry->skb_list);
1756 if (skb_tailroom(rx->skb) < entry->extra_len) {
1757 I802_DEBUG_INC(rx->local->rx_expand_skb_head2);
1758 if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
1759 GFP_ATOMIC))) {
1760 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
1761 __skb_queue_purge(&entry->skb_list);
e4c26add 1762 return RX_DROP_UNUSABLE;
571ecf67
JB		 1763 }
1764 }
1765 while ((skb = __skb_dequeue(&entry->skb_list))) {
1766 memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len);
1767 dev_kfree_skb(skb);
1768 }
1769
1770 /* Complete frame has been reassembled - process it now */
554891e6
JB		 1771 status = IEEE80211_SKB_RXCB(rx->skb);
1772 status->rx_flags |= IEEE80211_RX_FRAGMENTED;
571ecf67
JB		 1773
1774 out:
1775 if (rx->sta)
1776 rx->sta->rx_packets++;
1777 if (is_multicast_ether_addr(hdr->addr1))
1778 rx->local->dot11MulticastReceivedFrameCount++;
1779 else
1780 ieee80211_led_rx(rx->local);
9ae54c84 1781 return RX_CONTINUE;
571ecf67
JB		 1782}
1783
1df332e8 1784static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
571ecf67 1785{
1df332e8 1786 if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED)))
76ee65bf 1787 return -EACCES;
571ecf67 1788
76ee65bf 1789 return 0;
571ecf67
JB		 1790}
1791
1df332e8 1792static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
571ecf67 1793{
eb9fb5b8
JB		 1794 struct sk_buff *skb = rx->skb;
1795 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1796
3017b80b 1797 /*
7848ba7d
JB		 1798 * Pass through unencrypted frames if the hardware has
1799 * decrypted them already.
3017b80b 1800 */
eb9fb5b8 1801 if (status->flag & RX_FLAG_DECRYPTED)
76ee65bf 1802 return 0;
571ecf67
JB		 1803
1804 /* Drop unencrypted frames if key is set. */
358c8d9d
HH		 1805 if (unlikely(!ieee80211_has_protected(fc) &&
1806 !ieee80211_is_nullfunc(fc) &&
f2ca3ea4 1807 ieee80211_is_data(fc) &&
b3fc9c6c 1808 (rx->key || rx->sdata->drop_unencrypted)))
76ee65bf 1809 return -EACCES;
bef5d1c7
JB		 1810
1811 return 0;
1812}
1813
1df332e8 1814static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
bef5d1c7
JB		 1815{
1816 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
e3efca0a 1817 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
bef5d1c7 1818 __le16 fc = hdr->frame_control;
bef5d1c7 1819
e3efca0a
JM		 1820 /*
1821 * Pass through unencrypted frames if the hardware has
1822 * decrypted them already.
1823 */
1824 if (status->flag & RX_FLAG_DECRYPTED)
1825 return 0;
bef5d1c7 1826
c2c98fde 1827 if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) {
d211e90e
JM		 1828 if (unlikely(!ieee80211_has_protected(fc) &&
1829 ieee80211_is_unicast_robust_mgmt_frame(rx->skb) &&
cf4e594e 1830 rx->key)) {
6ff57cf8
JB		 1831 if (ieee80211_is_deauth(fc) ||
1832 ieee80211_is_disassoc(fc))
1833 cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
1834 rx->skb->data,
1835 rx->skb->len);
f2ca3ea4 1836 return -EACCES;
cf4e594e 1837 }
f2ca3ea4 1838 /* BIP does not use Protected field, so need to check MMIE */
f64f9e71 1839 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) &&
cf4e594e 1840 ieee80211_get_mmie_keyidx(rx->skb) < 0)) {
6ff57cf8
JB		 1841 if (ieee80211_is_deauth(fc) ||
1842 ieee80211_is_disassoc(fc))
1843 cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
1844 rx->skb->data,
1845 rx->skb->len);
f2ca3ea4 1846 return -EACCES;
cf4e594e 1847 }
f2ca3ea4
JM		 1848 /*
1849 * When using MFP, Action frames are not allowed prior to
1850 * having configured keys.
1851 */
1852 if (unlikely(ieee80211_is_action(fc) && !rx->key &&
d8ca16db 1853 ieee80211_is_robust_mgmt_frame(rx->skb)))
f2ca3ea4
JM		 1854 return -EACCES;
1855 }
b3fc9c6c 1856
76ee65bf 1857 return 0;
571ecf67
JB		 1858}
1859
76ee65bf 1860static int
4114fa21 1861__ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)
571ecf67 1862{
eb9fb5b8 1863 struct ieee80211_sub_if_data *sdata = rx->sdata;
f14543ee 1864 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
fbb327c5
FF		 1865 bool check_port_control = false;
1866 struct ethhdr *ehdr;
1867 int ret;
f14543ee 1868
4114fa21 1869 *port_control = false;
9bc383de
JB		 1870 if (ieee80211_has_a4(hdr->frame_control) &&
1871 sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
f14543ee 1872 return -1;
9bc383de 1873
fbb327c5
FF		 1874 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1875 !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) {
1876
1877 if (!sdata->u.mgd.use_4addr)
1878 return -1;
1879 else
1880 check_port_control = true;
1881 }
1882
9bc383de 1883 if (is_multicast_ether_addr(hdr->addr1) &&
fbb327c5 1884 sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta)
f14543ee 1885 return -1;
571ecf67 1886
fbb327c5 1887 ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
4114fa21 1888 if (ret < 0)
fbb327c5
FF		 1889 return ret;
1890
1891 ehdr = (struct ethhdr *) rx->skb->data;
4114fa21
FF		 1892 if (ehdr->h_proto == rx->sdata->control_port_protocol)
1893 *port_control = true;
1894 else if (check_port_control)
fbb327c5
FF		 1895 return -1;
1896
1897 return 0;
76ee65bf 1898}
571ecf67 1899
ce3edf6d
JB		 1900/*
1901 * requires that rx->skb is a frame with ethernet header
1902 */
358c8d9d 1903static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
ce3edf6d 1904{
c97c23e3 1905 static const u8 pae_group_addr[ETH_ALEN] __aligned(2)
ce3edf6d
JB		 1906 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
1907 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
1908
1909 /*
1910 * Allow EAPOL frames to us/the PAE group address regardless
1911 * of whether the frame was encrypted or not.
1912 */
a621fa4d 1913 if (ehdr->h_proto == rx->sdata->control_port_protocol &&
3bc7945e
JP		 1914 (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) ||
1915 ether_addr_equal(ehdr->h_dest, pae_group_addr)))
ce3edf6d
JB		 1916 return true;
1917
1918 if (ieee80211_802_1x_port_control(rx) ||
358c8d9d 1919 ieee80211_drop_unencrypted(rx, fc))
ce3edf6d
JB		 1920 return false;
1921
1922 return true;
1923}
1924
1925/*
1926 * requires that rx->skb is a frame with ethernet header
1927 */
76ee65bf 1928static void
5cf121c3 1929ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
76ee65bf 1930{
eb9fb5b8
JB		 1931 struct ieee80211_sub_if_data *sdata = rx->sdata;
1932 struct net_device *dev = sdata->dev;
76ee65bf 1933 struct sk_buff *skb, *xmit_skb;
ce3edf6d
JB		 1934 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
1935 struct sta_info *dsta;
554891e6 1936 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
571ecf67 1937
76ee65bf
RR		 1938 skb = rx->skb;
1939 xmit_skb = NULL;
571ecf67 1940
05c914fe
JB		 1941 if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1942 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
213cd118 1943 !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
554891e6 1944 (status->rx_flags & IEEE80211_RX_RA_MATCH) &&
9bc383de 1945 (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) {
ce3edf6d
JB		 1946 if (is_multicast_ether_addr(ehdr->h_dest)) {
1947 /*
1948 * send multicast frames both to higher layers in
1949 * local net stack and back to the wireless medium
1950 */
76ee65bf 1951 xmit_skb = skb_copy(skb, GFP_ATOMIC);
e87cc472 1952 if (!xmit_skb)
bdcbd8e0 1953 net_info_ratelimited("%s: failed to clone multicast frame\n",
e87cc472 1954 dev->name);
571ecf67 1955 } else {
abe60632
JB		 1956 dsta = sta_info_get(sdata, skb->data);
1957 if (dsta) {
ce3edf6d
JB		 1958 /*
1959 * The destination station is associated to
1960 * this AP (in this VLAN), so send the frame
1961 * directly to it and do not pass it to local
1962 * net stack.
571ecf67 1963 */
76ee65bf 1964 xmit_skb = skb;
571ecf67
JB		 1965 skb = NULL;
1966 }
571ecf67
JB		 1967 }
1968 }
1969
59d9cb07 1970#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
9e890a1f
JB		 1971 if (skb) {
1972 /* 'align' will only take the values 0 or 2 here since all
1973 * frames are required to be aligned to 2-byte boundaries
1974 * when being passed to mac80211; the code here works just
1975 * as well if that isn't true, but mac80211 assumes it can
1976 * access fields as 2-byte aligned (e.g. for ether_addr_equal)
d1c3a37c 1977 */
9e890a1f
JB		 1978 int align;
1979
1980 align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3;
d1c3a37c
JB		 1981 if (align) {
1982 if (WARN_ON(skb_headroom(skb) < 3)) {
1983 dev_kfree_skb(skb);
1984 skb = NULL;
1985 } else {
1986 u8 *data = skb->data;
8ce0b589
ZY		 1987 size_t len = skb_headlen(skb);
1988 skb->data -= align;
1989 memmove(skb->data, data, len);
1990 skb_set_tail_pointer(skb, len);
d1c3a37c
JB		 1991 }
1992 }
9e890a1f 1993 }
d1c3a37c
JB		 1994#endif
1995
9e890a1f
JB		 1996 if (skb) {
1997 /* deliver to local stack */
1998 skb->protocol = eth_type_trans(skb, dev);
1999 memset(skb->cb, 0, sizeof(skb->cb));
06d181a8
JB		 2000 if (rx->local->napi)
2001 napi_gro_receive(rx->local->napi, skb);
2002 else
2003 netif_receive_skb(skb);
571ecf67
JB		 2004 }
2005
76ee65bf 2006 if (xmit_skb) {
aef6c928
HS		 2007 /*
2008 * Send to wireless media and increase priority by 256 to
2009 * keep the received priority instead of reclassifying
2010 * the frame (see cfg80211_classify8021d).
2011 */
2012 xmit_skb->priority += 256;
f831e909 2013 xmit_skb->protocol = htons(ETH_P_802_3);
ce3edf6d
JB		 2014 skb_reset_network_header(xmit_skb);
2015 skb_reset_mac_header(xmit_skb);
76ee65bf 2016 dev_queue_xmit(xmit_skb);
571ecf67 2017 }
76ee65bf
RR		 2018}
2019
49461622 2020static ieee80211_rx_result debug_noinline
5cf121c3 2021ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
fd4c7f2f 2022{
eb9fb5b8 2023 struct net_device *dev = rx->sdata->dev;
eaf85ca7 2024 struct sk_buff *skb = rx->skb;
358c8d9d
HH		 2025 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2026 __le16 fc = hdr->frame_control;
eaf85ca7 2027 struct sk_buff_head frame_list;
554891e6 2028 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
fd4c7f2f 2029
358c8d9d 2030 if (unlikely(!ieee80211_is_data(fc)))
9ae54c84 2031 return RX_CONTINUE;
fd4c7f2f 2032
358c8d9d 2033 if (unlikely(!ieee80211_is_data_present(fc)))
e4c26add 2034 return RX_DROP_MONITOR;
fd4c7f2f 2035
554891e6 2036 if (!(status->rx_flags & IEEE80211_RX_AMSDU))
9ae54c84 2037 return RX_CONTINUE;
fd4c7f2f 2038
eaf85ca7
ZY		 2039 if (ieee80211_has_a4(hdr->frame_control) &&
2040 rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
2041 !rx->sdata->u.vlan.sta)
e4c26add 2042 return RX_DROP_UNUSABLE;
fd4c7f2f 2043
eaf85ca7
ZY		 2044 if (is_multicast_ether_addr(hdr->addr1) &&
2045 ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
2046 rx->sdata->u.vlan.sta) ||
2047 (rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
2048 rx->sdata->u.mgd.use_4addr)))
e4c26add 2049 return RX_DROP_UNUSABLE;
fd4c7f2f 2050
eaf85ca7
ZY		 2051 skb->dev = dev;
2052 __skb_queue_head_init(&frame_list);
fd4c7f2f 2053
e3cf8b3f
ZY		 2054 if (skb_linearize(skb))
2055 return RX_DROP_UNUSABLE;
2056
eaf85ca7
ZY		 2057 ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr,
2058 rx->sdata->vif.type,
8b3becad 2059 rx->local->hw.extra_tx_headroom, true);
fd4c7f2f 2060
eaf85ca7
ZY		 2061 while (!skb_queue_empty(&frame_list)) {
2062 rx->skb = __skb_dequeue(&frame_list);
fd4c7f2f 2063
358c8d9d 2064 if (!ieee80211_frame_allowed(rx, fc)) {
eaf85ca7 2065 dev_kfree_skb(rx->skb);
ce3edf6d
JB		 2066 continue;
2067 }
eaf85ca7
ZY		 2068 dev->stats.rx_packets++;
2069 dev->stats.rx_bytes += rx->skb->len;
fd4c7f2f
RR		 2070
2071 ieee80211_deliver_skb(rx);
2072 }
2073
9ae54c84 2074 return RX_QUEUED;
fd4c7f2f
RR		 2075}
2076
bf94e17b 2077#ifdef CONFIG_MAC80211_MESH
b0dee578 2078static ieee80211_rx_result
e32f85f7
LCC		 2079ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
2080{
30789eb6
TP		 2081 struct ieee80211_hdr *fwd_hdr, *hdr;
2082 struct ieee80211_tx_info *info;
e32f85f7 2083 struct ieee80211s_hdr *mesh_hdr;
e32f85f7 2084 struct sk_buff *skb = rx->skb, *fwd_skb;
3b8d81e0 2085 struct ieee80211_local *local = rx->local;
eb9fb5b8 2086 struct ieee80211_sub_if_data *sdata = rx->sdata;
554891e6 2087 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
30789eb6 2088 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
30789eb6 2089 u16 q, hdrlen;
e32f85f7
LCC		 2090
2091 hdr = (struct ieee80211_hdr *) skb->data;
2092 hdrlen = ieee80211_hdrlen(hdr->frame_control);
9b395bc3
JB		 2093
2094 /* make sure fixed part of mesh header is there, also checks skb len */
2095 if (!pskb_may_pull(rx->skb, hdrlen + 6))
2096 return RX_DROP_MONITOR;
2097
2098 mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
2099
2100 /* make sure full mesh header is there, also checks skb len */
2101 if (!pskb_may_pull(rx->skb,
2102 hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr)))
2103 return RX_DROP_MONITOR;
2104
2105 /* reload pointers */
2106 hdr = (struct ieee80211_hdr *) skb->data;
e32f85f7
LCC		 2107 mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
2108
2157fdd6
TP		 2109 /* frame is in RMC, don't forward */
2110 if (ieee80211_is_data(hdr->frame_control) &&
2111 is_multicast_ether_addr(hdr->addr1) &&
bf7cd94d 2112 mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr))
2157fdd6
TP		 2113 return RX_DROP_MONITOR;
2114
555cb715
JC		 2115 if (!ieee80211_is_data(hdr->frame_control) ||
2116 !(status->rx_flags & IEEE80211_RX_RA_MATCH))
e32f85f7
LCC		 2117 return RX_CONTINUE;
2118
2119 if (!mesh_hdr->ttl)
e32f85f7
LCC		 2120 return RX_DROP_MONITOR;
2121
43b7b314 2122 if (mesh_hdr->flags & MESH_FLAGS_AE) {
79617dee 2123 struct mesh_path *mppath;
43b7b314
JC		 2124 char *proxied_addr;
2125 char *mpp_addr;
2126
2127 if (is_multicast_ether_addr(hdr->addr1)) {
2128 mpp_addr = hdr->addr3;
2129 proxied_addr = mesh_hdr->eaddr1;
9b395bc3
JB		 2130 } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) {
2131 /* has_a4 already checked in ieee80211_rx_mesh_check */
43b7b314
JC		 2132 mpp_addr = hdr->addr4;
2133 proxied_addr = mesh_hdr->eaddr2;
9b395bc3
JB		 2134 } else {
2135 return RX_DROP_MONITOR;
43b7b314 2136 }
79617dee 2137
79617dee 2138 rcu_read_lock();
bf7cd94d 2139 mppath = mpp_path_lookup(sdata, proxied_addr);
79617dee 2140 if (!mppath) {
bf7cd94d 2141 mpp_path_add(sdata, proxied_addr, mpp_addr);
79617dee
Y		 2142 } else {
2143 spin_lock_bh(&mppath->state_lock);
b203ca39 2144 if (!ether_addr_equal(mppath->mpp, mpp_addr))
43b7b314 2145 memcpy(mppath->mpp, mpp_addr, ETH_ALEN);
79617dee
Y		 2146 spin_unlock_bh(&mppath->state_lock);
2147 }
2148 rcu_read_unlock();
2149 }
2150
3c5772a5
JC		 2151 /* Frame has reached destination. Don't forward */
2152 if (!is_multicast_ether_addr(hdr->addr1) &&
b203ca39 2153 ether_addr_equal(sdata->vif.addr, hdr->addr3))
e32f85f7
LCC		 2154 return RX_CONTINUE;
2155
00e96dec 2156 q = ieee80211_select_queue_80211(sdata, skb, hdr);
d3c1597b 2157 if (ieee80211_queue_stopped(&local->hw, q)) {
30789eb6 2158 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion);
d3c1597b
TP		 2159 return RX_DROP_MONITOR;
2160 }
2161 skb_set_queue_mapping(skb, q);
e32f85f7 2162
30789eb6
TP		 2163 if (!--mesh_hdr->ttl) {
2164 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl);
2ac64cd1 2165 goto out;
30789eb6
TP		 2166 }
2167
d665508b
CYY		 2168 if (!ifmsh->mshcfg.dot11MeshForwarding)
2169 goto out;
2170
30789eb6
TP		 2171 fwd_skb = skb_copy(skb, GFP_ATOMIC);
2172 if (!fwd_skb) {
bdcbd8e0 2173 net_info_ratelimited("%s: failed to clone mesh frame\n",
e87cc472 2174 sdata->name);
30789eb6
TP		 2175 goto out;
2176 }
2177
2178 fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
9d6d6f49 2179 fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY);
30789eb6
TP		 2180 info = IEEE80211_SKB_CB(fwd_skb);
2181 memset(info, 0, sizeof(*info));
2182 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
2183 info->control.vif = &rx->sdata->vif;
2184 info->control.jiffies = jiffies;
2185 if (is_multicast_ether_addr(fwd_hdr->addr1)) {
2186 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast);
2187 memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
3f52b7e3
MP		 2188 /* update power mode indication when forwarding */
2189 ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr);
bf7cd94d 2190 } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) {
3f52b7e3 2191 /* mesh power mode flags updated in mesh_nexthop_lookup */
30789eb6
TP		 2192 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
2193 } else {
2194 /* unable to resolve next hop */
bf7cd94d 2195 mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl,
f63f8421
CYY		 2196 fwd_hdr->addr3, 0,
2197 WLAN_REASON_MESH_PATH_NOFORWARD,
2198 fwd_hdr->addr2);
30789eb6 2199 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route);
74b8cc3d 2200 kfree_skb(fwd_skb);
30789eb6 2201 return RX_DROP_MONITOR;
e32f85f7
LCC		 2202 }
2203
30789eb6
TP		 2204 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
2205 ieee80211_add_pending_skb(local, fwd_skb);
b51aff05 2206 out:
3c5772a5 2207 if (is_multicast_ether_addr(hdr->addr1) ||
eb9fb5b8 2208 sdata->dev->flags & IFF_PROMISC)
e32f85f7
LCC		 2209 return RX_CONTINUE;
2210 else
2211 return RX_DROP_MONITOR;
2212}
bf94e17b 2213#endif
e32f85f7 2214
49461622 2215static ieee80211_rx_result debug_noinline
5cf121c3 2216ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
76ee65bf 2217{
eb9fb5b8 2218 struct ieee80211_sub_if_data *sdata = rx->sdata;
e15276a4 2219 struct ieee80211_local *local = rx->local;
eb9fb5b8 2220 struct net_device *dev = sdata->dev;
358c8d9d
HH		 2221 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
2222 __le16 fc = hdr->frame_control;
4114fa21 2223 bool port_control;
ce3edf6d 2224 int err;
76ee65bf 2225
358c8d9d 2226 if (unlikely(!ieee80211_is_data(hdr->frame_control)))
9ae54c84 2227 return RX_CONTINUE;
76ee65bf 2228
358c8d9d 2229 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
e4c26add 2230 return RX_DROP_MONITOR;
76ee65bf 2231
f14543ee 2232 /*
e7f4a940
JB		 2233 * Send unexpected-4addr-frame event to hostapd. For older versions,
2234 * also drop the frame to cooked monitor interfaces.
f14543ee
FF		 2235 */
2236 if (ieee80211_has_a4(hdr->frame_control) &&
e7f4a940
JB		 2237 sdata->vif.type == NL80211_IFTYPE_AP) {
2238 if (rx->sta &&
2239 !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT))
2240 cfg80211_rx_unexpected_4addr_frame(
2241 rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC);
f14543ee 2242 return RX_DROP_MONITOR;
e7f4a940 2243 }
f14543ee 2244
4114fa21 2245 err = __ieee80211_data_to_8023(rx, &port_control);
76ee65bf 2246 if (unlikely(err))
e4c26add 2247 return RX_DROP_UNUSABLE;
76ee65bf 2248
358c8d9d 2249 if (!ieee80211_frame_allowed(rx, fc))
e4c26add 2250 return RX_DROP_MONITOR;
ce3edf6d 2251
4114fa21
FF		 2252 if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
2253 unlikely(port_control) && sdata->bss) {
2254 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2255 u.ap);
2256 dev = sdata->dev;
2257 rx->sdata = sdata;
2258 }
2259
76ee65bf
RR		 2260 rx->skb->dev = dev;
2261
2262 dev->stats.rx_packets++;
2263 dev->stats.rx_bytes += rx->skb->len;
2264
08ca944e 2265 if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 &&
8c99f691
RM		 2266 !is_multicast_ether_addr(
2267 ((struct ethhdr *)rx->skb->data)->h_dest) &&
2268 (!local->scanning &&
2269 !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) {
e15276a4
VN		 2270 mod_timer(&local->dynamic_ps_timer, jiffies +
2271 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
2272 }
2273
76ee65bf 2274 ieee80211_deliver_skb(rx);
571ecf67 2275
9ae54c84 2276 return RX_QUEUED;
571ecf67
JB		 2277}
2278
49461622 2279static ieee80211_rx_result debug_noinline
f9e124fb 2280ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames)
71364716 2281{
71364716 2282 struct sk_buff *skb = rx->skb;
a7767f95 2283 struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data;
71364716
RR		 2284 struct tid_ampdu_rx *tid_agg_rx;
2285 u16 start_seq_num;
2286 u16 tid;
2287
a7767f95 2288 if (likely(!ieee80211_is_ctl(bar->frame_control)))
9ae54c84 2289 return RX_CONTINUE;
71364716 2290
a7767f95 2291 if (ieee80211_is_back_req(bar->frame_control)) {
8ae5977f
JB		 2292 struct {
2293 __le16 control, start_seq_num;
2294 } __packed bar_data;
2295
71364716 2296 if (!rx->sta)
a02ae758 2297 return RX_DROP_MONITOR;
8ae5977f
JB		 2298
2299 if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control),
2300 &bar_data, sizeof(bar_data)))
2301 return RX_DROP_MONITOR;
2302
8ae5977f 2303 tid = le16_to_cpu(bar_data.control) >> 12;
a87f736d
JB		 2304
2305 tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]);
2306 if (!tid_agg_rx)
a02ae758 2307 return RX_DROP_MONITOR;
71364716 2308
8ae5977f 2309 start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4;
71364716
RR		 2310
2311 /* reset session timer */
20ad19d0
JB		 2312 if (tid_agg_rx->timeout)
2313 mod_timer(&tid_agg_rx->session_timer,
2314 TU_TO_EXP_TIME(tid_agg_rx->timeout));
71364716 2315
dd318575 2316 spin_lock(&tid_agg_rx->reorder_lock);
a02ae758 2317 /* release stored frames up to start of BAR */
d3b2fb53 2318 ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx,
f9e124fb 2319 start_seq_num, frames);
dd318575
JB		 2320 spin_unlock(&tid_agg_rx->reorder_lock);
2321
a02ae758
JB		 2322 kfree_skb(skb);
2323 return RX_QUEUED;
71364716
RR		 2324 }
2325
08daecae
JB		 2326 /*
2327 * After this point, we only want management frames,
2328 * so we can drop all remaining control frames to
2329 * cooked monitor interfaces.
2330 */
2331 return RX_DROP_MONITOR;
71364716
RR		 2332}
2333
f4f727a6
JM		 2334static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata,
2335 struct ieee80211_mgmt *mgmt,
2336 size_t len)
fea14732
JM		 2337{
2338 struct ieee80211_local *local = sdata->local;
2339 struct sk_buff *skb;
2340 struct ieee80211_mgmt *resp;
2341
b203ca39 2342 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) {
fea14732
JM		 2343 /* Not to own unicast address */
2344 return;
2345 }
2346
b203ca39
JP		 2347 if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) ||
2348 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) {
77fdaa12 2349 /* Not from the current AP or not associated yet. */
fea14732
JM		 2350 return;
2351 }
2352
2353 if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) {
2354 /* Too short SA Query request frame */
2355 return;
2356 }
2357
2358 skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom);
2359 if (skb == NULL)
2360 return;
2361
2362 skb_reserve(skb, local->hw.extra_tx_headroom);
2363 resp = (struct ieee80211_mgmt *) skb_put(skb, 24);
2364 memset(resp, 0, 24);
2365 memcpy(resp->da, mgmt->sa, ETH_ALEN);
47846c9b 2366 memcpy(resp->sa, sdata->vif.addr, ETH_ALEN);
46900298 2367 memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN);
fea14732
JM		 2368 resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2369 IEEE80211_STYPE_ACTION);
2370 skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query));
2371 resp->u.action.category = WLAN_CATEGORY_SA_QUERY;
2372 resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE;
2373 memcpy(resp->u.action.u.sa_query.trans_id,
2374 mgmt->u.action.u.sa_query.trans_id,
2375 WLAN_SA_QUERY_TR_ID_LEN);
2376
62ae67be 2377 ieee80211_tx_skb(sdata, skb);
fea14732
JM		 2378}
2379
2e161f78
JB		 2380static ieee80211_rx_result debug_noinline
2381ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx)
2382{
2383 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
554891e6 2384 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
2e161f78
JB		 2385
2386 /*
2387 * From here on, look only at management frames.
2388 * Data and control frames are already handled,
2389 * and unknown (reserved) frames are useless.
2390 */
2391 if (rx->skb->len < 24)
2392 return RX_DROP_MONITOR;
2393
2394 if (!ieee80211_is_mgmt(mgmt->frame_control))
2395 return RX_DROP_MONITOR;
2396
ee971924
JB		 2397 if (rx->sdata->vif.type == NL80211_IFTYPE_AP &&
2398 ieee80211_is_beacon(mgmt->frame_control) &&
2399 !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) {
804483e9
JB		 2400 int sig = 0;
2401
2402 if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
2403 sig = status->signal;
2404
ee971924
JB		 2405 cfg80211_report_obss_beacon(rx->local->hw.wiphy,
2406 rx->skb->data, rx->skb->len,
37c73b5f 2407 status->freq, sig);
ee971924
JB		 2408 rx->flags |= IEEE80211_RX_BEACON_REPORTED;
2409 }
2410
554891e6 2411 if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
2e161f78
JB		 2412 return RX_DROP_MONITOR;
2413
2414 if (ieee80211_drop_unencrypted_mgmt(rx))
2415 return RX_DROP_UNUSABLE;
2416
2417 return RX_CONTINUE;
2418}
2419
de1ede7a
JB		 2420static ieee80211_rx_result debug_noinline
2421ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
2422{
2423 struct ieee80211_local *local = rx->local;
eb9fb5b8 2424 struct ieee80211_sub_if_data *sdata = rx->sdata;
de1ede7a 2425 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
554891e6 2426 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
de1ede7a
JB		 2427 int len = rx->skb->len;
2428
2429 if (!ieee80211_is_action(mgmt->frame_control))
2430 return RX_CONTINUE;
2431
026331c4
JM		 2432 /* drop too small frames */
2433 if (len < IEEE80211_MIN_ACTION_SIZE)
84040805 2434 return RX_DROP_UNUSABLE;
de1ede7a 2435
815b8092 2436 if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC &&
cd7760e6
SW		 2437 mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED &&
2438 mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
84040805 2439 return RX_DROP_UNUSABLE;
de1ede7a 2440
554891e6 2441 if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
84040805 2442 return RX_DROP_UNUSABLE;
97ebe12a 2443
de1ede7a 2444 switch (mgmt->u.action.category) {
1d8d3dec
JB		 2445 case WLAN_CATEGORY_HT:
2446 /* reject HT action frames from stations not supporting HT */
2447 if (!rx->sta->sta.ht_cap.ht_supported)
2448 goto invalid;
2449
2450 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2451 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
2452 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2453 sdata->vif.type != NL80211_IFTYPE_AP &&
2454 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2455 break;
2456
ec61cd63 2457 /* verify action & smps_control/chanwidth are present */
1d8d3dec
JB		 2458 if (len < IEEE80211_MIN_ACTION_SIZE + 2)
2459 goto invalid;
2460
2461 switch (mgmt->u.action.u.ht_smps.action) {
2462 case WLAN_HT_ACTION_SMPS: {
2463 struct ieee80211_supported_band *sband;
af0ed69b 2464 enum ieee80211_smps_mode smps_mode;
1d8d3dec
JB		 2465
2466 /* convert to HT capability */
2467 switch (mgmt->u.action.u.ht_smps.smps_control) {
2468 case WLAN_HT_SMPS_CONTROL_DISABLED:
af0ed69b 2469 smps_mode = IEEE80211_SMPS_OFF;
1d8d3dec
JB		 2470 break;
2471 case WLAN_HT_SMPS_CONTROL_STATIC:
af0ed69b 2472 smps_mode = IEEE80211_SMPS_STATIC;
1d8d3dec
JB		 2473 break;
2474 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
af0ed69b 2475 smps_mode = IEEE80211_SMPS_DYNAMIC;
1d8d3dec
JB		 2476 break;
2477 default:
2478 goto invalid;
2479 }
1d8d3dec
JB		 2480
2481 /* if no change do nothing */
af0ed69b 2482 if (rx->sta->sta.smps_mode == smps_mode)
1d8d3dec 2483 goto handled;
af0ed69b 2484 rx->sta->sta.smps_mode = smps_mode;
1d8d3dec
JB		 2485
2486 sband = rx->local->hw.wiphy->bands[status->band];
2487
64f68e5d
JB		 2488 rate_control_rate_update(local, sband, rx->sta,
2489 IEEE80211_RC_SMPS_CHANGED);
1d8d3dec
JB		 2490 goto handled;
2491 }
ec61cd63
JB		 2492 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
2493 struct ieee80211_supported_band *sband;
2494 u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
e1a0c6b3 2495 enum ieee80211_sta_rx_bandwidth new_bw;
ec61cd63
JB		 2496
2497 /* If it doesn't support 40 MHz it can't change ... */
e1a0c6b3
JB		 2498 if (!(rx->sta->sta.ht_cap.cap &
2499 IEEE80211_HT_CAP_SUP_WIDTH_20_40))
ec61cd63
JB		 2500 goto handled;
2501
e1a0c6b3
JB		 2502 if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ)
2503 new_bw = IEEE80211_STA_RX_BW_20;
2504 else
2505 new_bw = ieee80211_sta_cur_vht_bw(rx->sta);
ec61cd63 2506
e1a0c6b3 2507 if (rx->sta->sta.bandwidth == new_bw)
ec61cd63
JB		 2508 goto handled;
2509
ec61cd63
JB		 2510 sband = rx->local->hw.wiphy->bands[status->band];
2511
2512 rate_control_rate_update(local, sband, rx->sta,
2513 IEEE80211_RC_BW_CHANGED);
2514 goto handled;
2515 }
1d8d3dec
JB		 2516 default:
2517 goto invalid;
2518 }
2519
0af83d3d 2520 break;
1b3a2e49
JB		 2521 case WLAN_CATEGORY_PUBLIC:
2522 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2523 goto invalid;
2524 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2525 break;
2526 if (!rx->sta)
2527 break;
2528 if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid))
2529 break;
2530 if (mgmt->u.action.u.ext_chan_switch.action_code !=
2531 WLAN_PUB_ACTION_EXT_CHANSW_ANN)
2532 break;
2533 if (len < offsetof(struct ieee80211_mgmt,
2534 u.action.u.ext_chan_switch.variable))
2535 goto invalid;
2536 goto queue;
0af83d3d
JB		 2537 case WLAN_CATEGORY_VHT:
2538 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2539 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
2540 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2541 sdata->vif.type != NL80211_IFTYPE_AP &&
2542 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2543 break;
2544
2545 /* verify action code is present */
2546 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2547 goto invalid;
2548
2549 switch (mgmt->u.action.u.vht_opmode_notif.action_code) {
2550 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
2551 u8 opmode;
2552
2553 /* verify opmode is present */
2554 if (len < IEEE80211_MIN_ACTION_SIZE + 2)
2555 goto invalid;
2556
2557 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
2558
2559 ieee80211_vht_handle_opmode(rx->sdata, rx->sta,
bee7f586
JB		 2560 opmode, status->band,
2561 false);
0af83d3d
JB		 2562 goto handled;
2563 }
2564 default:
2565 break;
2566 }
1d8d3dec 2567 break;
de1ede7a 2568 case WLAN_CATEGORY_BACK:
8abd3f9b 2569 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
ae2772b3 2570 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
8abd3f9b 2571 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
13c40c54
AS		 2572 sdata->vif.type != NL80211_IFTYPE_AP &&
2573 sdata->vif.type != NL80211_IFTYPE_ADHOC)
84040805 2574 break;
8abd3f9b 2575
026331c4
JM		 2576 /* verify action_code is present */
2577 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2578 break;
2579
de1ede7a
JB		 2580 switch (mgmt->u.action.u.addba_req.action_code) {
2581 case WLAN_ACTION_ADDBA_REQ:
2582 if (len < (IEEE80211_MIN_ACTION_SIZE +
2583 sizeof(mgmt->u.action.u.addba_req)))
bed7ee6e
JB		 2584 goto invalid;
2585 break;
de1ede7a
JB		 2586 case WLAN_ACTION_ADDBA_RESP:
2587 if (len < (IEEE80211_MIN_ACTION_SIZE +
2588 sizeof(mgmt->u.action.u.addba_resp)))
bed7ee6e
JB		 2589 goto invalid;
2590 break;
de1ede7a
JB		 2591 case WLAN_ACTION_DELBA:
2592 if (len < (IEEE80211_MIN_ACTION_SIZE +
2593 sizeof(mgmt->u.action.u.delba)))
bed7ee6e
JB		 2594 goto invalid;
2595 break;
2596 default:
2597 goto invalid;
de1ede7a 2598 }
bed7ee6e 2599
8b58ff83 2600 goto queue;
39192c0b 2601 case WLAN_CATEGORY_SPECTRUM_MGMT:
026331c4
JM		 2602 /* verify action_code is present */
2603 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2604 break;
2605
39192c0b
JB		 2606 switch (mgmt->u.action.u.measurement.action_code) {
2607 case WLAN_ACTION_SPCT_MSR_REQ:
cd7760e6
SW		 2608 if (status->band != IEEE80211_BAND_5GHZ)
2609 break;
2610
39192c0b
JB		 2611 if (len < (IEEE80211_MIN_ACTION_SIZE +
2612 sizeof(mgmt->u.action.u.measurement)))
84040805 2613 break;
cd7760e6
SW		 2614
2615 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2616 break;
2617
39192c0b 2618 ieee80211_process_measurement_req(sdata, mgmt, len);
84040805 2619 goto handled;
cd7760e6
SW		 2620 case WLAN_ACTION_SPCT_CHL_SWITCH: {
2621 u8 *bssid;
2622 if (len < (IEEE80211_MIN_ACTION_SIZE +
2623 sizeof(mgmt->u.action.u.chan_switch)))
84040805 2624 break;
cc32abd4 2625
cd7760e6 2626 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
b8456a14
CYY		 2627 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2628 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
cd7760e6
SW		 2629 break;
2630
2631 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2632 bssid = sdata->u.mgd.bssid;
2633 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
2634 bssid = sdata->u.ibss.bssid;
b8456a14
CYY		 2635 else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
2636 bssid = mgmt->sa;
cd7760e6
SW		 2637 else
2638 break;
2639
2640 if (!ether_addr_equal(mgmt->bssid, bssid))
84040805 2641 break;
c481ec97 2642
8b58ff83 2643 goto queue;
cd7760e6 2644 }
39192c0b
JB		 2645 }
2646 break;
fea14732
JM		 2647 case WLAN_CATEGORY_SA_QUERY:
2648 if (len < (IEEE80211_MIN_ACTION_SIZE +
2649 sizeof(mgmt->u.action.u.sa_query)))
84040805
JB		 2650 break;
2651
fea14732
JM		 2652 switch (mgmt->u.action.u.sa_query.action) {
2653 case WLAN_ACTION_SA_QUERY_REQUEST:
2654 if (sdata->vif.type != NL80211_IFTYPE_STATION)
84040805 2655 break;
fea14732 2656 ieee80211_process_sa_query_req(sdata, mgmt, len);
84040805 2657 goto handled;
fea14732
JM		 2658 }
2659 break;
8db09850 2660 case WLAN_CATEGORY_SELF_PROTECTED:
9b395bc3
JB		 2661 if (len < (IEEE80211_MIN_ACTION_SIZE +
2662 sizeof(mgmt->u.action.u.self_prot.action_code)))
2663 break;
2664
8db09850
TP		 2665 switch (mgmt->u.action.u.self_prot.action_code) {
2666 case WLAN_SP_MESH_PEERING_OPEN:
2667 case WLAN_SP_MESH_PEERING_CLOSE:
2668 case WLAN_SP_MESH_PEERING_CONFIRM:
2669 if (!ieee80211_vif_is_mesh(&sdata->vif))
2670 goto invalid;
a6dad6a2 2671 if (sdata->u.mesh.user_mpm)
8db09850
TP		 2672 /* userspace handles this frame */
2673 break;
2674 goto queue;
2675 case WLAN_SP_MGK_INFORM:
2676 case WLAN_SP_MGK_ACK:
2677 if (!ieee80211_vif_is_mesh(&sdata->vif))
2678 goto invalid;
2679 break;
2680 }
2681 break;
d3aaec8a 2682 case WLAN_CATEGORY_MESH_ACTION:
9b395bc3
JB		 2683 if (len < (IEEE80211_MIN_ACTION_SIZE +
2684 sizeof(mgmt->u.action.u.mesh_action.action_code)))
2685 break;
2686
77a121c3
JB		 2687 if (!ieee80211_vif_is_mesh(&sdata->vif))
2688 break;
25d49e4d 2689 if (mesh_action_is_path_sel(mgmt) &&
1df332e8 2690 !mesh_path_sel_is_hwmp(sdata))
c7108a71
JC		 2691 break;
2692 goto queue;
84040805 2693 }
026331c4 2694
2e161f78
JB		 2695 return RX_CONTINUE;
2696
bed7ee6e 2697 invalid:
554891e6 2698 status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM;
2e161f78
JB		 2699 /* will return in the next handlers */
2700 return RX_CONTINUE;
2701
2702 handled:
2703 if (rx->sta)
2704 rx->sta->rx_packets++;
2705 dev_kfree_skb(rx->skb);
2706 return RX_QUEUED;
2707
2708 queue:
2709 rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME;
2710 skb_queue_tail(&sdata->skb_queue, rx->skb);
2711 ieee80211_queue_work(&local->hw, &sdata->work);
2712 if (rx->sta)
2713 rx->sta->rx_packets++;
2714 return RX_QUEUED;
2715}
2716
2717static ieee80211_rx_result debug_noinline
2718ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx)
2719{
554891e6 2720 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
804483e9 2721 int sig = 0;
2e161f78
JB		 2722
2723 /* skip known-bad action frames and return them in the next handler */
554891e6 2724 if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM)
2e161f78 2725 return RX_CONTINUE;
d7907448 2726
026331c4
JM		 2727 /*
2728 * Getting here means the kernel doesn't know how to handle
2729 * it, but maybe userspace does ... include returned frames
2730 * so userspace can register for those to know whether ones
2731 * it transmitted were processed or returned.
2732 */
026331c4 2733
804483e9
JB		 2734 if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
2735 sig = status->signal;
2736
71bbc994 2737 if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig,
970fdfa8 2738 rx->skb->data, rx->skb->len, 0)) {
2e161f78
JB		 2739 if (rx->sta)
2740 rx->sta->rx_packets++;
2741 dev_kfree_skb(rx->skb);
2742 return RX_QUEUED;
2743 }
2744
2e161f78
JB		 2745 return RX_CONTINUE;
2746}
2747
2748static ieee80211_rx_result debug_noinline
2749ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx)
2750{
2751 struct ieee80211_local *local = rx->local;
2752 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
2753 struct sk_buff *nskb;
2754 struct ieee80211_sub_if_data *sdata = rx->sdata;
554891e6 2755 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
2e161f78
JB		 2756
2757 if (!ieee80211_is_action(mgmt->frame_control))
2758 return RX_CONTINUE;
2759
2760 /*
2761 * For AP mode, hostapd is responsible for handling any action
2762 * frames that we didn't handle, including returning unknown
2763 * ones. For all other modes we will return them to the sender,
2764 * setting the 0x80 bit in the action category, as required by
4b5ebccc 2765 * 802.11-2012 9.24.4.
2e161f78
JB		 2766 * Newer versions of hostapd shall also use the management frame
2767 * registration mechanisms, but older ones still use cooked
2768 * monitor interfaces so push all frames there.
2769 */
554891e6 2770 if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) &&
2e161f78
JB		 2771 (sdata->vif.type == NL80211_IFTYPE_AP ||
2772 sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
2773 return RX_DROP_MONITOR;
026331c4 2774
4b5ebccc
JB		 2775 if (is_multicast_ether_addr(mgmt->da))
2776 return RX_DROP_MONITOR;
2777
84040805
JB		 2778 /* do not return rejected action frames */
2779 if (mgmt->u.action.category & 0x80)
2780 return RX_DROP_UNUSABLE;
2781
2782 nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0,
2783 GFP_ATOMIC);
2784 if (nskb) {
292b4df6 2785 struct ieee80211_mgmt *nmgmt = (void *)nskb->data;
84040805 2786
292b4df6
JL		 2787 nmgmt->u.action.category |= 0x80;
2788 memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN);
2789 memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN);
84040805
JB		 2790
2791 memset(nskb->cb, 0, sizeof(nskb->cb));
2792
07e5a5f5
JB		 2793 if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
2794 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb);
2795
2796 info->flags = IEEE80211_TX_CTL_TX_OFFCHAN |
2797 IEEE80211_TX_INTFL_OFFCHAN_TX_OK |
2798 IEEE80211_TX_CTL_NO_CCK_RATE;
2799 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
2800 info->hw_queue =
2801 local->hw.offchannel_tx_hw_queue;
2802 }
2803
2804 __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7,
2805 status->band);
de1ede7a 2806 }
39192c0b
JB		 2807 dev_kfree_skb(rx->skb);
2808 return RX_QUEUED;
de1ede7a
JB		 2809}
2810
49461622 2811static ieee80211_rx_result debug_noinline
5cf121c3 2812ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
571ecf67 2813{
eb9fb5b8 2814 struct ieee80211_sub_if_data *sdata = rx->sdata;
77a121c3
JB		 2815 struct ieee80211_mgmt *mgmt = (void *)rx->skb->data;
2816 __le16 stype;
571ecf67 2817
77a121c3 2818 stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE);
472dbc45 2819
77a121c3
JB		 2820 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
2821 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2822 sdata->vif.type != NL80211_IFTYPE_STATION)
2823 return RX_DROP_MONITOR;
472dbc45 2824
77a121c3 2825 switch (stype) {
66e67e41 2826 case cpu_to_le16(IEEE80211_STYPE_AUTH):
77a121c3
JB		 2827 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2828 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2829 /* process for all: mesh, mlme, ibss */
2830 break;
66e67e41
JB		 2831 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2832 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
77a121c3
JB		 2833 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2834 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2c31333a
CL		 2835 if (is_multicast_ether_addr(mgmt->da) &&
2836 !is_broadcast_ether_addr(mgmt->da))
2837 return RX_DROP_MONITOR;
2838
77a121c3
JB		 2839 /* process only for station */
2840 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2841 return RX_DROP_MONITOR;
2842 break;
2843 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
9fb04b50
TP		 2844 /* process only for ibss and mesh */
2845 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2846 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
77a121c3
JB		 2847 return RX_DROP_MONITOR;
2848 break;
2849 default:
2850 return RX_DROP_MONITOR;
2851 }
f9d540ee 2852
77a121c3 2853 /* queue up frame and kick off work to process it */
c1475ca9 2854 rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME;
77a121c3
JB		 2855 skb_queue_tail(&sdata->skb_queue, rx->skb);
2856 ieee80211_queue_work(&rx->local->hw, &sdata->work);
8b58ff83
JB		 2857 if (rx->sta)
2858 rx->sta->rx_packets++;
46900298 2859
77a121c3 2860 return RX_QUEUED;
571ecf67
JB		 2861}
2862
5cf121c3 2863/* TODO: use IEEE80211_RX_FRAGMENTED */
5f0b7de5
JB		 2864static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
2865 struct ieee80211_rate *rate)
3d30d949
MW		 2866{
2867 struct ieee80211_sub_if_data *sdata;
2868 struct ieee80211_local *local = rx->local;
3d30d949
MW		 2869 struct sk_buff *skb = rx->skb, *skb2;
2870 struct net_device *prev_dev = NULL;
eb9fb5b8 2871 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
293702a3 2872 int needed_headroom;
3d30d949 2873
554891e6
JB		 2874 /*
2875 * If cooked monitor has been processed already, then
2876 * don't do it again. If not, set the flag.
2877 */
2878 if (rx->flags & IEEE80211_RX_CMNTR)
7c1e1831 2879 goto out_free_skb;
554891e6 2880 rx->flags |= IEEE80211_RX_CMNTR;
7c1e1831 2881
152c477a
JB		 2882 /* If there are no cooked monitor interfaces, just free the SKB */
2883 if (!local->cooked_mntrs)
2884 goto out_free_skb;
2885
293702a3 2886 /* room for the radiotap header based on driver features */
90b9e446 2887 needed_headroom = ieee80211_rx_radiotap_space(local, status);
3d30d949 2888
293702a3
JB		 2889 if (skb_headroom(skb) < needed_headroom &&
2890 pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC))
2891 goto out_free_skb;
3d30d949 2892
293702a3 2893 /* prepend radiotap information */
973ef21a
FF		 2894 ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom,
2895 false);
3d30d949
MW		 2896
2897 skb_set_mac_header(skb, 0);
2898 skb->ip_summed = CHECKSUM_UNNECESSARY;
2899 skb->pkt_type = PACKET_OTHERHOST;
2900 skb->protocol = htons(ETH_P_802_2);
2901
2902 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
9607e6b6 2903 if (!ieee80211_sdata_running(sdata))
3d30d949
MW		 2904 continue;
2905
05c914fe 2906 if (sdata->vif.type != NL80211_IFTYPE_MONITOR ||
3d30d949
MW		 2907 !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES))
2908 continue;
2909
2910 if (prev_dev) {
2911 skb2 = skb_clone(skb, GFP_ATOMIC);
2912 if (skb2) {
2913 skb2->dev = prev_dev;
5548a8a1 2914 netif_receive_skb(skb2);
3d30d949
MW		 2915 }
2916 }
2917
2918 prev_dev = sdata->dev;
2919 sdata->dev->stats.rx_packets++;
2920 sdata->dev->stats.rx_bytes += skb->len;
2921 }
2922
2923 if (prev_dev) {
2924 skb->dev = prev_dev;
5548a8a1 2925 netif_receive_skb(skb);
554891e6
JB		 2926 return;
2927 }
3d30d949
MW		 2928
2929 out_free_skb:
2930 dev_kfree_skb(skb);
2931}
2932
aa0c8636
CL		 2933static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx,
2934 ieee80211_rx_result res)
2935{
2936 switch (res) {
2937 case RX_DROP_MONITOR:
2938 I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
2939 if (rx->sta)
2940 rx->sta->rx_dropped++;
2941 /* fall through */
2942 case RX_CONTINUE: {
2943 struct ieee80211_rate *rate = NULL;
2944 struct ieee80211_supported_band *sband;
2945 struct ieee80211_rx_status *status;
2946
2947 status = IEEE80211_SKB_RXCB((rx->skb));
2948
2949 sband = rx->local->hw.wiphy->bands[status->band];
5614618e
JB		 2950 if (!(status->flag & RX_FLAG_HT) &&
2951 !(status->flag & RX_FLAG_VHT))
aa0c8636
CL		 2952 rate = &sband->bitrates[status->rate_idx];
2953
2954 ieee80211_rx_cooked_monitor(rx, rate);
2955 break;
2956 }
2957 case RX_DROP_UNUSABLE:
2958 I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
2959 if (rx->sta)
2960 rx->sta->rx_dropped++;
2961 dev_kfree_skb(rx->skb);
2962 break;
2963 case RX_QUEUED:
2964 I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued);
2965 break;
2966 }
2967}
571ecf67 2968
f9e124fb
CL		 2969static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx,
2970 struct sk_buff_head *frames)
58905290 2971{
58905290 2972 ieee80211_rx_result res = RX_DROP_MONITOR;
aa0c8636 2973 struct sk_buff *skb;
8944b79f 2974
e32f85f7
LCC		 2975#define CALL_RXH(rxh) \
2976 do { \
2977 res = rxh(rx); \
2978 if (res != RX_CONTINUE) \
2569a826 2979 goto rxh_next; \
e32f85f7 2980 } while (0);
49461622 2981
f9e124fb 2982 spin_lock_bh(&rx->local->rx_path_lock);
24a8fdad 2983
f9e124fb 2984 while ((skb = __skb_dequeue(frames))) {
2569a826
JB		 2985 /*
2986 * all the other fields are valid across frames
2987 * that belong to an aMPDU since they are on the
2988 * same TID from the same station
2989 */
2990 rx->skb = skb;
2991
2569a826 2992 CALL_RXH(ieee80211_rx_h_check_more_data)
47086fc5 2993 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll)
2569a826 2994 CALL_RXH(ieee80211_rx_h_sta_process)
86c228a7 2995 CALL_RXH(ieee80211_rx_h_decrypt)
2569a826 2996 CALL_RXH(ieee80211_rx_h_defragment)
2569a826
JB		 2997 CALL_RXH(ieee80211_rx_h_michael_mic_verify)
2998 /* must be after MMIC verify so header is counted in MPDU mic */
bf94e17b 2999#ifdef CONFIG_MAC80211_MESH
aa0c8636 3000 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
2569a826 3001 CALL_RXH(ieee80211_rx_h_mesh_fwding);
bf94e17b 3002#endif
2154c81c 3003 CALL_RXH(ieee80211_rx_h_amsdu)
2569a826 3004 CALL_RXH(ieee80211_rx_h_data)
f9e124fb
CL		 3005
3006 /* special treatment -- needs the queue */
3007 res = ieee80211_rx_h_ctrl(rx, frames);
3008 if (res != RX_CONTINUE)
3009 goto rxh_next;
3010
2e161f78 3011 CALL_RXH(ieee80211_rx_h_mgmt_check)
2569a826 3012 CALL_RXH(ieee80211_rx_h_action)
2e161f78
JB		 3013 CALL_RXH(ieee80211_rx_h_userspace_mgmt)
3014 CALL_RXH(ieee80211_rx_h_action_return)
2569a826 3015 CALL_RXH(ieee80211_rx_h_mgmt)
49461622 3016
aa0c8636
CL		 3017 rxh_next:
3018 ieee80211_rx_handlers_result(rx, res);
f9e124fb 3019
49461622 3020#undef CALL_RXH
aa0c8636 3021 }
24a8fdad 3022
f9e124fb 3023 spin_unlock_bh(&rx->local->rx_path_lock);
aa0c8636
CL		 3024}
3025
4406c376 3026static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx)
aa0c8636 3027{
f9e124fb 3028 struct sk_buff_head reorder_release;
aa0c8636
CL		 3029 ieee80211_rx_result res = RX_DROP_MONITOR;
3030
f9e124fb
CL		 3031 __skb_queue_head_init(&reorder_release);
3032
aa0c8636
CL		 3033#define CALL_RXH(rxh) \
3034 do { \
3035 res = rxh(rx); \
3036 if (res != RX_CONTINUE) \
3037 goto rxh_next; \
3038 } while (0);
3039
aa0c8636
CL		 3040 CALL_RXH(ieee80211_rx_h_check)
3041
f9e124fb 3042 ieee80211_rx_reorder_ampdu(rx, &reorder_release);
aa0c8636 3043
f9e124fb 3044 ieee80211_rx_handlers(rx, &reorder_release);
aa0c8636 3045 return;
49461622 3046
2569a826 3047 rxh_next:
aa0c8636
CL		 3048 ieee80211_rx_handlers_result(rx, res);
3049
3050#undef CALL_RXH
58905290
JB		 3051}
3052
2bff8ebf 3053/*
dd318575
JB		 3054 * This function makes calls into the RX path, therefore
3055 * it has to be invoked under RCU read lock.
2bff8ebf
CL		 3056 */
3057void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid)
3058{
f9e124fb 3059 struct sk_buff_head frames;
554891e6
JB		 3060 struct ieee80211_rx_data rx = {
3061 .sta = sta,
3062 .sdata = sta->sdata,
3063 .local = sta->local,
9e26297a
JB		 3064 /* This is OK -- must be QoS data frame */
3065 .security_idx = tid,
3066 .seqno_idx = tid,
fcf8bd3b 3067 .flags = 0,
554891e6 3068 };
2c15a0cf
CL		 3069 struct tid_ampdu_rx *tid_agg_rx;
3070
3071 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
3072 if (!tid_agg_rx)
3073 return;
2bff8ebf 3074
f9e124fb
CL		 3075 __skb_queue_head_init(&frames);
3076
2c15a0cf 3077 spin_lock(&tid_agg_rx->reorder_lock);
f9e124fb 3078 ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames);
2c15a0cf 3079 spin_unlock(&tid_agg_rx->reorder_lock);
2bff8ebf 3080
f9e124fb 3081 ieee80211_rx_handlers(&rx, &frames);
2bff8ebf
CL		 3082}
3083
571ecf67
JB		 3084/* main receive path */
3085
3c2723f5
JB		 3086static bool prepare_for_handlers(struct ieee80211_rx_data *rx,
3087 struct ieee80211_hdr *hdr)
23a24def 3088{
20b01f80 3089 struct ieee80211_sub_if_data *sdata = rx->sdata;
eb9fb5b8
JB		 3090 struct sk_buff *skb = rx->skb;
3091 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
3092 u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type);
23a24def
JB		 3093 int multicast = is_multicast_ether_addr(hdr->addr1);
3094
51fb61e7 3095 switch (sdata->vif.type) {
05c914fe 3096 case NL80211_IFTYPE_STATION:
9bc383de 3097 if (!bssid && !sdata->u.mgd.use_4addr)
3c2723f5 3098 return false;
77fdaa12 3099 if (!multicast &&
b203ca39 3100 !ether_addr_equal(sdata->vif.addr, hdr->addr1)) {
4f312336
FF		 3101 if (!(sdata->dev->flags & IFF_PROMISC) ||
3102 sdata->u.mgd.use_4addr)
3c2723f5 3103 return false;
554891e6 3104 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
23a24def
JB		 3105 }
3106 break;
05c914fe 3107 case NL80211_IFTYPE_ADHOC:
23a24def 3108 if (!bssid)
3c2723f5 3109 return false;
6329b8d9
FF		 3110 if (ether_addr_equal(sdata->vif.addr, hdr->addr2) ||
3111 ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2))
3c2723f5 3112 return false;
a7767f95 3113 if (ieee80211_is_beacon(hdr->frame_control)) {
3c2723f5 3114 return true;
d48b2968 3115 } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) {
3c2723f5 3116 return false;
23a24def 3117 } else if (!multicast &&
b203ca39 3118 !ether_addr_equal(sdata->vif.addr, hdr->addr1)) {
4150c572 3119 if (!(sdata->dev->flags & IFF_PROMISC))
3c2723f5 3120 return false;
554891e6 3121 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
0fb8ca45
JM		 3122 } else if (!rx->sta) {
3123 int rate_idx;
5614618e
JB		 3124 if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT))
3125 rate_idx = 0; /* TODO: HT/VHT rates */
0fb8ca45 3126 else
eb9fb5b8 3127 rate_idx = status->rate_idx;
8bf11d8d
JB		 3128 ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2,
3129 BIT(rate_idx));
0fb8ca45 3130 }
23a24def 3131 break;
05c914fe 3132 case NL80211_IFTYPE_MESH_POINT:
6032f934 3133 if (!multicast &&
b203ca39 3134 !ether_addr_equal(sdata->vif.addr, hdr->addr1)) {
6032f934 3135 if (!(sdata->dev->flags & IFF_PROMISC))
3c2723f5 3136 return false;
6032f934 3137
554891e6 3138 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
6032f934
JB		 3139 }
3140 break;
05c914fe
JB		 3141 case NL80211_IFTYPE_AP_VLAN:
3142 case NL80211_IFTYPE_AP:
23a24def 3143 if (!bssid) {
b203ca39 3144 if (!ether_addr_equal(sdata->vif.addr, hdr->addr1))
3c2723f5 3145 return false;
f142c6b9 3146 } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) {
3df6eaea
JB		 3147 /*
3148 * Accept public action frames even when the
3149 * BSSID doesn't match, this is used for P2P
3150 * and location updates. Note that mac80211
3151 * itself never looks at these frames.
3152 */
2b9ccd4e
JB		 3153 if (!multicast &&
3154 !ether_addr_equal(sdata->vif.addr, hdr->addr1))
3c2723f5 3155 return false;
d48b2968 3156 if (ieee80211_is_public_action(hdr, skb->len))
3c2723f5 3157 return true;
d48b2968 3158 if (!ieee80211_is_beacon(hdr->frame_control))
3c2723f5 3159 return false;
554891e6 3160 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
db8e1732
AN		 3161 } else if (!ieee80211_has_tods(hdr->frame_control)) {
3162 /* ignore data frames to TDLS-peers */
3163 if (ieee80211_is_data(hdr->frame_control))
3164 return false;
3165 /* ignore action frames to TDLS-peers */
3166 if (ieee80211_is_action(hdr->frame_control) &&
3167 !ether_addr_equal(bssid, hdr->addr1))
3168 return false;
23a24def 3169 }
23a24def 3170 break;
05c914fe 3171 case NL80211_IFTYPE_WDS:
a7767f95 3172 if (bssid || !ieee80211_is_data(hdr->frame_control))
3c2723f5 3173 return false;
b203ca39 3174 if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2))
3c2723f5 3175 return false;
23a24def 3176 break;
f142c6b9
JB		 3177 case NL80211_IFTYPE_P2P_DEVICE:
3178 if (!ieee80211_is_public_action(hdr, skb->len) &&
3179 !ieee80211_is_probe_req(hdr->frame_control) &&
3180 !ieee80211_is_probe_resp(hdr->frame_control) &&
3181 !ieee80211_is_beacon(hdr->frame_control))
3c2723f5 3182 return false;
1b737f88
JB		 3183 if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) &&
3184 !multicast)
f142c6b9
JB		 3185 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
3186 break;
2ca27bcf 3187 default:
fb1c1cd6 3188 /* should never get here */
f142c6b9 3189 WARN_ON_ONCE(1);
fb1c1cd6 3190 break;
23a24def
JB		 3191 }
3192
3c2723f5 3193 return true;
23a24def
JB		 3194}
3195
4406c376
JB		 3196/*
3197 * This function returns whether or not the SKB
3198 * was destined for RX processing or not, which,
3199 * if consume is true, is equivalent to whether
3200 * or not the skb was consumed.
3201 */
3202static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx,
3203 struct sk_buff *skb, bool consume)
3204{
3205 struct ieee80211_local *local = rx->local;
3206 struct ieee80211_sub_if_data *sdata = rx->sdata;
3207 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
3208 struct ieee80211_hdr *hdr = (void *)skb->data;
4406c376
JB		 3209
3210 rx->skb = skb;
554891e6 3211 status->rx_flags |= IEEE80211_RX_RA_MATCH;
4406c376 3212
40791942 3213 if (!prepare_for_handlers(rx, hdr))
4406c376
JB		 3214 return false;
3215
4406c376
JB		 3216 if (!consume) {
3217 skb = skb_copy(skb, GFP_ATOMIC);
3218 if (!skb) {
3219 if (net_ratelimit())
3220 wiphy_debug(local->hw.wiphy,
b305dae4 3221 "failed to copy skb for %s\n",
4406c376
JB		 3222 sdata->name);
3223 return true;
3224 }
3225
3226 rx->skb = skb;
3227 }
3228
3229 ieee80211_invoke_rx_handlers(rx);
3230 return true;
3231}
3232
571ecf67 3233/*
6b59db7d 3234 * This is the actual Rx frames handler. as it belongs to Rx path it must
6368e4b1 3235 * be called with rcu_read_lock protection.
571ecf67 3236 */
71ebb4aa 3237static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
071d9ac2 3238 struct sk_buff *skb)
571ecf67
JB		 3239{
3240 struct ieee80211_local *local = hw_to_local(hw);
3241 struct ieee80211_sub_if_data *sdata;
571ecf67 3242 struct ieee80211_hdr *hdr;
e3cf8b3f 3243 __le16 fc;
5cf121c3 3244 struct ieee80211_rx_data rx;
4406c376 3245 struct ieee80211_sub_if_data *prev;
56af3268 3246 struct sta_info *sta, *tmp, *prev_sta;
e3cf8b3f 3247 int err = 0;
571ecf67 3248
e3cf8b3f 3249 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
571ecf67
JB		 3250 memset(&rx, 0, sizeof(rx));
3251 rx.skb = skb;
3252 rx.local = local;
72abd81b 3253
e3cf8b3f 3254 if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc))
571ecf67 3255 local->dot11ReceivedFragmentCount++;
571ecf67 3256
4a4f1a58
JB		 3257 if (ieee80211_is_mgmt(fc)) {
3258 /* drop frame if too short for header */
3259 if (skb->len < ieee80211_hdrlen(fc))
3260 err = -ENOBUFS;
3261 else
3262 err = skb_linearize(skb);
3263 } else {
e3cf8b3f 3264 err = !pskb_may_pull(skb, ieee80211_hdrlen(fc));
4a4f1a58 3265 }
e3cf8b3f
ZY		 3266
3267 if (err) {
3268 dev_kfree_skb(skb);
3269 return;
3270 }
3271
3272 hdr = (struct ieee80211_hdr *)skb->data;
38f3714d 3273 ieee80211_parse_qos(&rx);
d1c3a37c 3274 ieee80211_verify_alignment(&rx);
38f3714d 3275
d48b2968
JB		 3276 if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) ||
3277 ieee80211_is_beacon(hdr->frame_control)))
3278 ieee80211_scan_rx(local, skb);
3279
e3cf8b3f 3280 if (ieee80211_is_data(fc)) {
56af3268 3281 prev_sta = NULL;
4406c376 3282
7852e361 3283 for_each_sta_info(local, hdr->addr2, sta, tmp) {
56af3268
BG		 3284 if (!prev_sta) {
3285 prev_sta = sta;
3286 continue;
3287 }
3288
3289 rx.sta = prev_sta;
3290 rx.sdata = prev_sta->sdata;
4406c376 3291 ieee80211_prepare_and_rx_handle(&rx, skb, false);
abe60632 3292
56af3268 3293 prev_sta = sta;
4406c376 3294 }
56af3268
BG		 3295
3296 if (prev_sta) {
3297 rx.sta = prev_sta;
3298 rx.sdata = prev_sta->sdata;
3299
4406c376 3300 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
56af3268 3301 return;
8e26d5ad 3302 goto out;
56af3268 3303 }
4406c376
JB		 3304 }
3305
4b0dd98e 3306 prev = NULL;
b2e7771e 3307
4b0dd98e
JB		 3308 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3309 if (!ieee80211_sdata_running(sdata))
3310 continue;
340e11f3 3311
4b0dd98e
JB		 3312 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
3313 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3314 continue;
340e11f3 3315
4b0dd98e
JB		 3316 /*
3317 * frame is destined for this interface, but if it's
3318 * not also for the previous one we handle that after
3319 * the loop to avoid copying the SKB once too much
3320 */
4bb29f8c 3321
4b0dd98e 3322 if (!prev) {
abe60632 3323 prev = sdata;
4b0dd98e 3324 continue;
340e11f3 3325 }
4bb29f8c 3326
7852e361 3327 rx.sta = sta_info_get_bss(prev, hdr->addr2);
4b0dd98e
JB		 3328 rx.sdata = prev;
3329 ieee80211_prepare_and_rx_handle(&rx, skb, false);
4bb29f8c 3330
4b0dd98e
JB		 3331 prev = sdata;
3332 }
3333
3334 if (prev) {
7852e361 3335 rx.sta = sta_info_get_bss(prev, hdr->addr2);
4b0dd98e 3336 rx.sdata = prev;
4406c376 3337
4b0dd98e
JB		 3338 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
3339 return;
571ecf67 3340 }
4406c376 3341
8e26d5ad 3342 out:
4406c376 3343 dev_kfree_skb(skb);
571ecf67 3344}
6368e4b1
RR		 3345
3346/*
3347 * This is the receive path handler. It is called by a low level driver when an
3348 * 802.11 MPDU is received from the hardware.
3349 */
103bf9f7 3350void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
6368e4b1
RR		 3351{
3352 struct ieee80211_local *local = hw_to_local(hw);
8318d78a
JB		 3353 struct ieee80211_rate *rate = NULL;
3354 struct ieee80211_supported_band *sband;
f1d58c25 3355 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
8318d78a 3356
d20ef63d
JB		 3357 WARN_ON_ONCE(softirq_count() == 0);
3358
444e3803 3359 if (WARN_ON(status->band >= IEEE80211_NUM_BANDS))
77a980dc 3360 goto drop;
8318d78a
JB		 3361
3362 sband = local->hw.wiphy->bands[status->band];
77a980dc
JB		 3363 if (WARN_ON(!sband))
3364 goto drop;
8318d78a 3365
89c3a8ac
JB		 3366 /*
3367 * If we're suspending, it is possible although not too likely
3368 * that we'd be receiving frames after having already partially
3369 * quiesced the stack. We can't process such frames then since
3370 * that might, for example, cause stations to be added or other
3371 * driver callbacks be invoked.
3372 */
77a980dc
JB		 3373 if (unlikely(local->quiescing || local->suspended))
3374 goto drop;
89c3a8ac 3375
04800ada
AN		 3376 /* We might be during a HW reconfig, prevent Rx for the same reason */
3377 if (unlikely(local->in_reconfig))
3378 goto drop;
3379
ea77f12f
JB		 3380 /*
3381 * The same happens when we're not even started,
3382 * but that's worth a warning.
3383 */
77a980dc
JB		 3384 if (WARN_ON(!local->started))
3385 goto drop;
ea77f12f 3386
fc885189 3387 if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) {
e5d6eb83 3388 /*
fc885189
JB		 3389 * Validate the rate, unless a PLCP error means that
3390 * we probably can't have a valid rate here anyway.
e5d6eb83 3391 */
fc885189
JB		 3392
3393 if (status->flag & RX_FLAG_HT) {
3394 /*
3395 * rate_idx is MCS index, which can be [0-76]
3396 * as documented on:
3397 *
3398 * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
3399 *
3400 * Anything else would be some sort of driver or
3401 * hardware error. The driver should catch hardware
3402 * errors.
3403 */
444e3803 3404 if (WARN(status->rate_idx > 76,
fc885189
JB		 3405 "Rate marked as an HT rate but passed "
3406 "status->rate_idx is not "
3407 "an MCS index [0-76]: %d (0x%02x)\n",
3408 status->rate_idx,
3409 status->rate_idx))
3410 goto drop;
5614618e
JB		 3411 } else if (status->flag & RX_FLAG_VHT) {
3412 if (WARN_ONCE(status->rate_idx > 9 ||
3413 !status->vht_nss ||
3414 status->vht_nss > 8,
3415 "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
3416 status->rate_idx, status->vht_nss))
3417 goto drop;
fc885189 3418 } else {
444e3803 3419 if (WARN_ON(status->rate_idx >= sband->n_bitrates))
fc885189
JB		 3420 goto drop;
3421 rate = &sband->bitrates[status->rate_idx];
3422 }
0fb8ca45 3423 }
6368e4b1 3424
554891e6
JB		 3425 status->rx_flags = 0;
3426
6368e4b1
RR		 3427 /*
3428 * key references and virtual interfaces are protected using RCU
3429 * and this requires that we are in a read-side RCU section during
3430 * receive processing
3431 */
3432 rcu_read_lock();
3433
3434 /*
3435 * Frames with failed FCS/PLCP checksum are not returned,
3436 * all other frames are returned without radiotap header
3437 * if it was previously present.
3438 * Also, frames with less than 16 bytes are dropped.
3439 */
f1d58c25 3440 skb = ieee80211_rx_monitor(local, skb, rate);
6368e4b1
RR		 3441 if (!skb) {
3442 rcu_read_unlock();
3443 return;
3444 }
3445
e1e54068
JB		 3446 ieee80211_tpt_led_trig_rx(local,
3447 ((struct ieee80211_hdr *)skb->data)->frame_control,
3448 skb->len);
071d9ac2 3449 __ieee80211_rx_handle_packet(hw, skb);
6368e4b1
RR		 3450
3451 rcu_read_unlock();
77a980dc
JB		 3452
3453 return;
3454 drop:
3455 kfree_skb(skb);
6368e4b1 3456}
103bf9f7 3457EXPORT_SYMBOL(ieee80211_rx);
571ecf67
JB		 3458
3459/* This is a version of the rx handler that can be called from hard irq
3460 * context. Post the skb on the queue and schedule the tasklet */
f1d58c25 3461void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb)
571ecf67
JB		 3462{
3463 struct ieee80211_local *local = hw_to_local(hw);
3464
3465 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
3466
571ecf67
JB		 3467 skb->pkt_type = IEEE80211_RX_MSG;
3468 skb_queue_tail(&local->skb_queue, skb);
3469 tasklet_schedule(&local->tasklet);
3470}
3471EXPORT_SYMBOL(ieee80211_rx_irqsafe);
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