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mac80211: skip mpath lookup also for control port tx
[linux-2.6-block.git] / net / mac80211 / rx.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
571ecf67
JB		 2/*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
84040805 6 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
d98ad83e 7 * Copyright 2013-2014 Intel Mobile Communications GmbH
b7540d8f 8 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
c4d800dc 9 * Copyright (C) 2018-2020 Intel Corporation
571ecf67
JB		 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>
06470f74 20#include <linux/bitops.h>
571ecf67
JB		 21#include <net/mac80211.h>
22#include <net/ieee80211_radiotap.h>
d26ad377 23#include <asm/unaligned.h>
571ecf67
JB		 24
25#include "ieee80211_i.h"
24487981 26#include "driver-ops.h"
2c8dccc7 27#include "led.h"
33b64eb2 28#include "mesh.h"
571ecf67
JB		 29#include "wep.h"
30#include "wpa.h"
31#include "tkip.h"
32#include "wme.h"
1d8d3dec 33#include "rate.h"
571ecf67 34
5a490510
JB		 35static inline void ieee80211_rx_stats(struct net_device *dev, u32 len)
36{
37 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
38
39 u64_stats_update_begin(&tstats->syncp);
40 tstats->rx_packets++;
41 tstats->rx_bytes += len;
42 u64_stats_update_end(&tstats->syncp);
43}
44
a6828493
JB		 45static u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
46 enum nl80211_iftype type)
47{
48 __le16 fc = hdr->frame_control;
49
50 if (ieee80211_is_data(fc)) {
51 if (len < 24) /* drop incorrect hdr len (data) */
52 return NULL;
53
54 if (ieee80211_has_a4(fc))
55 return NULL;
56 if (ieee80211_has_tods(fc))
57 return hdr->addr1;
58 if (ieee80211_has_fromds(fc))
59 return hdr->addr2;
60
61 return hdr->addr3;
62 }
63
64 if (ieee80211_is_mgmt(fc)) {
65 if (len < 24) /* drop incorrect hdr len (mgmt) */
66 return NULL;
67 return hdr->addr3;
68 }
69
70 if (ieee80211_is_ctl(fc)) {
71 if (ieee80211_is_pspoll(fc))
72 return hdr->addr1;
73
74 if (ieee80211_is_back_req(fc)) {
75 switch (type) {
76 case NL80211_IFTYPE_STATION:
77 return hdr->addr2;
78 case NL80211_IFTYPE_AP:
79 case NL80211_IFTYPE_AP_VLAN:
80 return hdr->addr1;
81 default:
82 break; /* fall through to the return */
83 }
84 }
85 }
86
87 return NULL;
88}
89
b2e7771e
JB		 90/*
91 * monitor mode reception
92 *
93 * This function cleans up the SKB, i.e. it removes all the stuff
94 * only useful for monitoring.
95 */
c1129924
JB		 96static struct sk_buff *ieee80211_clean_skb(struct sk_buff *skb,
97 unsigned int present_fcs_len,
98 unsigned int rtap_space)
b2e7771e 99{
c1129924
JB		 100 struct ieee80211_hdr *hdr;
101 unsigned int hdrlen;
102 __le16 fc;
103
30841f5c
JB		 104 if (present_fcs_len)
105 __pskb_trim(skb, skb->len - present_fcs_len);
c096b92a 106 __pskb_pull(skb, rtap_space);
c1129924
JB		 107
108 hdr = (void *)skb->data;
109 fc = hdr->frame_control;
110
111 /*
112 * Remove the HT-Control field (if present) on management
113 * frames after we've sent the frame to monitoring. We
114 * (currently) don't need it, and don't properly parse
115 * frames with it present, due to the assumption of a
116 * fixed management header length.
117 */
118 if (likely(!ieee80211_is_mgmt(fc) || !ieee80211_has_order(fc)))
119 return skb;
120
121 hdrlen = ieee80211_hdrlen(fc);
122 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_ORDER);
123
124 if (!pskb_may_pull(skb, hdrlen)) {
125 dev_kfree_skb(skb);
126 return NULL;
127 }
128
129 memmove(skb->data + IEEE80211_HT_CTL_LEN, skb->data,
130 hdrlen - IEEE80211_HT_CTL_LEN);
131 __pskb_pull(skb, IEEE80211_HT_CTL_LEN);
132
133 return skb;
b2e7771e
JB		 134}
135
1f7bba79 136static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len,
c096b92a 137 unsigned int rtap_space)
b2e7771e 138{
f1d58c25 139 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1f7bba79
JB		 140 struct ieee80211_hdr *hdr;
141
c096b92a 142 hdr = (void *)(skb->data + rtap_space);
b2e7771e 143
4c298677 144 if (status->flag & (RX_FLAG_FAILED_FCS_CRC |
17883048 145 RX_FLAG_FAILED_PLCP_CRC |
c3d1f875
ST		 146 RX_FLAG_ONLY_MONITOR |
147 RX_FLAG_NO_PSDU))
6b59db7d
ZG		 148 return true;
149
c096b92a 150 if (unlikely(skb->len < 16 + present_fcs_len + rtap_space))
6b59db7d
ZG		 151 return true;
152
87228f57
HH		 153 if (ieee80211_is_ctl(hdr->frame_control) &&
154 !ieee80211_is_pspoll(hdr->frame_control) &&
155 !ieee80211_is_back_req(hdr->frame_control))
6b59db7d
ZG		 156 return true;
157
158 return false;
b2e7771e
JB		 159}
160
601ae7f2 161static int
1f7bba79
JB		 162ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local,
163 struct ieee80211_rx_status *status,
164 struct sk_buff *skb)
601ae7f2
BR		 165{
166 int len;
167
168 /* always present fields */
a144f378 169 len = sizeof(struct ieee80211_radiotap_header) + 8;
601ae7f2 170
a144f378 171 /* allocate extra bitmaps */
a144f378
JB		 172 if (status->chains)
173 len += 4 * hweight8(status->chains);
efc38dd7
JB		 174 /* vendor presence bitmap */
175 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)
176 len += 4;
90b9e446
JB		 177
178 if (ieee80211_have_rx_timestamp(status)) {
179 len = ALIGN(len, 8);
601ae7f2 180 len += 8;
90b9e446 181 }
30686bf7 182 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM))
601ae7f2 183 len += 1;
601ae7f2 184
a144f378
JB		 185 /* antenna field, if we don't have per-chain info */
186 if (!status->chains)
187 len += 1;
188
90b9e446
JB		 189 /* padding for RX_FLAGS if necessary */
190 len = ALIGN(len, 2);
601ae7f2 191
da6a4352 192 if (status->encoding == RX_ENC_HT) /* HT info */
6d744bac
JB		 193 len += 3;
194
4c298677 195 if (status->flag & RX_FLAG_AMPDU_DETAILS) {
90b9e446 196 len = ALIGN(len, 4);
4c298677
JB		 197 len += 8;
198 }
199
da6a4352 200 if (status->encoding == RX_ENC_VHT) {
51648921
JB		 201 len = ALIGN(len, 2);
202 len += 12;
203 }
204
99ee7cae
JB		 205 if (local->hw.radiotap_timestamp.units_pos >= 0) {
206 len = ALIGN(len, 8);
207 len += 12;
208 }
209
41cbb0f5
LC		 210 if (status->encoding == RX_ENC_HE &&
211 status->flag & RX_FLAG_RADIOTAP_HE) {
212 len = ALIGN(len, 2);
213 len += 12;
214 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he) != 12);
215 }
216
217 if (status->encoding == RX_ENC_HE &&
218 status->flag & RX_FLAG_RADIOTAP_HE_MU) {
219 len = ALIGN(len, 2);
220 len += 12;
221 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu) != 12);
222 }
223
c3d1f875
ST		 224 if (status->flag & RX_FLAG_NO_PSDU)
225 len += 1;
226
d1332e7b
ST		 227 if (status->flag & RX_FLAG_RADIOTAP_LSIG) {
228 len = ALIGN(len, 2);
229 len += 4;
230 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig) != 4);
231 }
232
a144f378
JB		 233 if (status->chains) {
234 /* antenna and antenna signal fields */
235 len += 2 * hweight8(status->chains);
236 }
237
1f7bba79 238 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
c15353be
LK		 239 struct ieee80211_vendor_radiotap *rtap;
240 int vendor_data_offset = 0;
241
242 /*
243 * The position to look at depends on the existence (or non-
244 * existence) of other elements, so take that into account...
245 */
246 if (status->flag & RX_FLAG_RADIOTAP_HE)
247 vendor_data_offset +=
248 sizeof(struct ieee80211_radiotap_he);
249 if (status->flag & RX_FLAG_RADIOTAP_HE_MU)
250 vendor_data_offset +=
251 sizeof(struct ieee80211_radiotap_he_mu);
252 if (status->flag & RX_FLAG_RADIOTAP_LSIG)
253 vendor_data_offset +=
254 sizeof(struct ieee80211_radiotap_lsig);
255
256 rtap = (void *)&skb->data[vendor_data_offset];
1f7bba79 257
1f7bba79
JB		 258 /* alignment for fixed 6-byte vendor data header */
259 len = ALIGN(len, 2);
260 /* vendor data header */
261 len += 6;
262 if (WARN_ON(rtap->align == 0))
263 rtap->align = 1;
264 len = ALIGN(len, rtap->align);
265 len += rtap->len + rtap->pad;
266 }
267
601ae7f2
BR		 268 return len;
269}
270
9e478066
JB		 271static void ieee80211_handle_mu_mimo_mon(struct ieee80211_sub_if_data *sdata,
272 struct sk_buff *skb,
c096b92a 273 int rtap_space)
9e478066
JB		 274{
275 struct {
276 struct ieee80211_hdr_3addr hdr;
277 u8 category;
278 u8 action_code;
7c53eb5d 279 } __packed __aligned(2) action;
9e478066
JB		 280
281 if (!sdata)
282 return;
283
284 BUILD_BUG_ON(sizeof(action) != IEEE80211_MIN_ACTION_SIZE + 1);
285
c096b92a 286 if (skb->len < rtap_space + sizeof(action) +
9e478066
JB		 287 VHT_MUMIMO_GROUPS_DATA_LEN)
288 return;
289
290 if (!is_valid_ether_addr(sdata->u.mntr.mu_follow_addr))
291 return;
292
c096b92a 293 skb_copy_bits(skb, rtap_space, &action, sizeof(action));
9e478066
JB		 294
295 if (!ieee80211_is_action(action.hdr.frame_control))
296 return;
297
298 if (action.category != WLAN_CATEGORY_VHT)
299 return;
300
301 if (action.action_code != WLAN_VHT_ACTION_GROUPID_MGMT)
302 return;
303
304 if (!ether_addr_equal(action.hdr.addr1, sdata->u.mntr.mu_follow_addr))
305 return;
306
307 skb = skb_copy(skb, GFP_ATOMIC);
308 if (!skb)
309 return;
310
9e478066
JB		 311 skb_queue_tail(&sdata->skb_queue, skb);
312 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
313}
314
00ea6deb 315/*
601ae7f2
BR		 316 * ieee80211_add_rx_radiotap_header - add radiotap header
317 *
318 * add a radiotap header containing all the fields which the hardware provided.
319 */
320static void
321ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
322 struct sk_buff *skb,
601ae7f2 323 struct ieee80211_rate *rate,
973ef21a 324 int rtap_len, bool has_fcs)
601ae7f2 325{
f1d58c25 326 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
601ae7f2
BR		 327 struct ieee80211_radiotap_header *rthdr;
328 unsigned char *pos;
a144f378
JB		 329 __le32 *it_present;
330 u32 it_present_val;
6a86b9c7 331 u16 rx_flags = 0;
a5e70697 332 u16 channel_flags = 0;
a144f378
JB		 333 int mpdulen, chain;
334 unsigned long chains = status->chains;
1f7bba79 335 struct ieee80211_vendor_radiotap rtap = {};
41cbb0f5
LC		 336 struct ieee80211_radiotap_he he = {};
337 struct ieee80211_radiotap_he_mu he_mu = {};
d1332e7b 338 struct ieee80211_radiotap_lsig lsig = {};
41cbb0f5
LC		 339
340 if (status->flag & RX_FLAG_RADIOTAP_HE) {
341 he = *(struct ieee80211_radiotap_he *)skb->data;
342 skb_pull(skb, sizeof(he));
343 WARN_ON_ONCE(status->encoding != RX_ENC_HE);
344 }
345
346 if (status->flag & RX_FLAG_RADIOTAP_HE_MU) {
347 he_mu = *(struct ieee80211_radiotap_he_mu *)skb->data;
348 skb_pull(skb, sizeof(he_mu));
349 }
1f7bba79 350
d1332e7b
ST		 351 if (status->flag & RX_FLAG_RADIOTAP_LSIG) {
352 lsig = *(struct ieee80211_radiotap_lsig *)skb->data;
353 skb_pull(skb, sizeof(lsig));
354 }
355
1f7bba79
JB		 356 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
357 rtap = *(struct ieee80211_vendor_radiotap *)skb->data;
358 /* rtap.len and rtap.pad are undone immediately */
359 skb_pull(skb, sizeof(rtap) + rtap.len + rtap.pad);
360 }
f4bda337
TP		 361
362 mpdulen = skb->len;
30686bf7 363 if (!(has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)))
f4bda337 364 mpdulen += FCS_LEN;
601ae7f2 365
d58ff351 366 rthdr = skb_push(skb, rtap_len);
1f7bba79 367 memset(rthdr, 0, rtap_len - rtap.len - rtap.pad);
a144f378 368 it_present = &rthdr->it_present;
601ae7f2
BR		 369
370 /* radiotap header, set always present flags */
0059b2b1 371 rthdr->it_len = cpu_to_le16(rtap_len);
a144f378
JB		 372 it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) |
373 BIT(IEEE80211_RADIOTAP_CHANNEL) |
374 BIT(IEEE80211_RADIOTAP_RX_FLAGS);
375
376 if (!status->chains)
377 it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA);
378
379 for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) {
380 it_present_val |=
381 BIT(IEEE80211_RADIOTAP_EXT) |
382 BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE);
383 put_unaligned_le32(it_present_val, it_present);
384 it_present++;
385 it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) |
386 BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
387 }
601ae7f2 388
1f7bba79
JB		 389 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
390 it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) |
391 BIT(IEEE80211_RADIOTAP_EXT);
392 put_unaligned_le32(it_present_val, it_present);
393 it_present++;
394 it_present_val = rtap.present;
395 }
396
a144f378
JB		 397 put_unaligned_le32(it_present_val, it_present);
398
399 pos = (void *)(it_present + 1);
400
601ae7f2
BR		 401 /* the order of the following fields is important */
402
403 /* IEEE80211_RADIOTAP_TSFT */
f4bda337 404 if (ieee80211_have_rx_timestamp(status)) {
90b9e446
JB		 405 /* padding */
406 while ((pos - (u8 *)rthdr) & 7)
407 *pos++ = 0;
f4bda337
TP		 408 put_unaligned_le64(
409 ieee80211_calculate_rx_timestamp(local, status,
410 mpdulen, 0),
411 pos);
1df332e8 412 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT);
601ae7f2
BR		 413 pos += 8;
414 }
415
416 /* IEEE80211_RADIOTAP_FLAGS */
30686bf7 417 if (has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS))
601ae7f2 418 *pos |= IEEE80211_RADIOTAP_F_FCS;
aae89831
JB		 419 if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
420 *pos |= IEEE80211_RADIOTAP_F_BADFCS;
7fdd69c5 421 if (status->enc_flags & RX_ENC_FLAG_SHORTPRE)
b4f28bbb 422 *pos |= IEEE80211_RADIOTAP_F_SHORTPRE;
601ae7f2
BR		 423 pos++;
424
425 /* IEEE80211_RADIOTAP_RATE */
da6a4352 426 if (!rate || status->encoding != RX_ENC_LEGACY) {
0fb8ca45 427 /*
f8d1ccf1 428 * Without rate information don't add it. If we have,
38f37be2 429 * MCS information is a separate field in radiotap,
73b48099
JB		 430 * added below. The byte here is needed as padding
431 * for the channel though, so initialise it to 0.
0fb8ca45
JM		 432 */
433 *pos = 0;
8d6f658e 434 } else {
2103dec1 435 int shift = 0;
ebe6c7ba 436 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
da6a4352 437 if (status->bw == RATE_INFO_BW_10)
2103dec1 438 shift = 1;
da6a4352 439 else if (status->bw == RATE_INFO_BW_5)
2103dec1
SW		 440 shift = 2;
441 *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift));
8d6f658e 442 }
601ae7f2
BR		 443 pos++;
444
445 /* IEEE80211_RADIOTAP_CHANNEL */
3b23c184 446 /* TODO: frequency offset in KHz */
6a86b9c7 447 put_unaligned_le16(status->freq, pos);
601ae7f2 448 pos += 2;
da6a4352 449 if (status->bw == RATE_INFO_BW_10)
a5e70697 450 channel_flags |= IEEE80211_CHAN_HALF;
da6a4352 451 else if (status->bw == RATE_INFO_BW_5)
a5e70697
SW		 452 channel_flags |= IEEE80211_CHAN_QUARTER;
453
57fbcce3 454 if (status->band == NL80211_BAND_5GHZ)
a5e70697 455 channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ;
da6a4352 456 else if (status->encoding != RX_ENC_LEGACY)
a5e70697 457 channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ;
f8d1ccf1 458 else if (rate && rate->flags & IEEE80211_RATE_ERP_G)
a5e70697 459 channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ;
f8d1ccf1 460 else if (rate)
3a5c5e81 461 channel_flags |= IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ;
f8d1ccf1 462 else
a5e70697
SW		 463 channel_flags |= IEEE80211_CHAN_2GHZ;
464 put_unaligned_le16(channel_flags, pos);
601ae7f2
BR		 465 pos += 2;
466
467 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
30686bf7 468 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM) &&
fe8431f8 469 !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
601ae7f2
BR		 470 *pos = status->signal;
471 rthdr->it_present |=
472 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
473 pos++;
474 }
475
601ae7f2
BR		 476 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
477
a144f378
JB		 478 if (!status->chains) {
479 /* IEEE80211_RADIOTAP_ANTENNA */
480 *pos = status->antenna;
481 pos++;
482 }
601ae7f2 483
601ae7f2
BR		 484 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
485
486 /* IEEE80211_RADIOTAP_RX_FLAGS */
487 /* ensure 2 byte alignment for the 2 byte field as required */
6a86b9c7 488 if ((pos - (u8 *)rthdr) & 1)
90b9e446 489 *pos++ = 0;
aae89831 490 if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
6a86b9c7
JB		 491 rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP;
492 put_unaligned_le16(rx_flags, pos);
601ae7f2 493 pos += 2;
6d744bac 494
da6a4352 495 if (status->encoding == RX_ENC_HT) {
786677d1
OR		 496 unsigned int stbc;
497
6d744bac 498 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
ac55d2fe 499 *pos++ = local->hw.radiotap_mcs_details;
6d744bac 500 *pos = 0;
7fdd69c5 501 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
6d744bac 502 *pos |= IEEE80211_RADIOTAP_MCS_SGI;
da6a4352 503 if (status->bw == RATE_INFO_BW_40)
6d744bac 504 *pos |= IEEE80211_RADIOTAP_MCS_BW_40;
7fdd69c5 505 if (status->enc_flags & RX_ENC_FLAG_HT_GF)
ac55d2fe 506 *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF;
7fdd69c5 507 if (status->enc_flags & RX_ENC_FLAG_LDPC)
63c361f5 508 *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC;
7fdd69c5 509 stbc = (status->enc_flags & RX_ENC_FLAG_STBC_MASK) >> RX_ENC_FLAG_STBC_SHIFT;
786677d1 510 *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT;
6d744bac
JB		 511 pos++;
512 *pos++ = status->rate_idx;
513 }
4c298677
JB		 514
515 if (status->flag & RX_FLAG_AMPDU_DETAILS) {
516 u16 flags = 0;
517
518 /* ensure 4 byte alignment */
519 while ((pos - (u8 *)rthdr) & 3)
520 pos++;
521 rthdr->it_present |=
522 cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS);
523 put_unaligned_le32(status->ampdu_reference, pos);
524 pos += 4;
4c298677
JB		 525 if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN)
526 flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN;
527 if (status->flag & RX_FLAG_AMPDU_IS_LAST)
528 flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST;
529 if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR)
530 flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR;
531 if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
532 flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN;
7299d6f7
JB		 533 if (status->flag & RX_FLAG_AMPDU_EOF_BIT_KNOWN)
534 flags |= IEEE80211_RADIOTAP_AMPDU_EOF_KNOWN;
535 if (status->flag & RX_FLAG_AMPDU_EOF_BIT)
536 flags |= IEEE80211_RADIOTAP_AMPDU_EOF;
4c298677
JB		 537 put_unaligned_le16(flags, pos);
538 pos += 2;
539 if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
540 *pos++ = status->ampdu_delimiter_crc;
541 else
542 *pos++ = 0;
543 *pos++ = 0;
544 }
90b9e446 545
da6a4352 546 if (status->encoding == RX_ENC_VHT) {
51648921
JB		 547 u16 known = local->hw.radiotap_vht_details;
548
549 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
51648921
JB		 550 put_unaligned_le16(known, pos);
551 pos += 2;
552 /* flags */
7fdd69c5 553 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
51648921 554 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
63c361f5 555 /* in VHT, STBC is binary */
7fdd69c5 556 if (status->enc_flags & RX_ENC_FLAG_STBC_MASK)
63c361f5 557 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC;
7fdd69c5 558 if (status->enc_flags & RX_ENC_FLAG_BF)
fb378c23 559 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED;
51648921
JB		 560 pos++;
561 /* bandwidth */
da6a4352
JB		 562 switch (status->bw) {
563 case RATE_INFO_BW_80:
51648921 564 *pos++ = 4;
da6a4352
JB		 565 break;
566 case RATE_INFO_BW_160:
51648921 567 *pos++ = 11;
da6a4352
JB		 568 break;
569 case RATE_INFO_BW_40:
51648921 570 *pos++ = 1;
da6a4352
JB		 571 break;
572 default:
51648921 573 *pos++ = 0;
da6a4352 574 }
51648921 575 /* MCS/NSS */
8613c948 576 *pos = (status->rate_idx << 4) | status->nss;
51648921
JB		 577 pos += 4;
578 /* coding field */
7fdd69c5 579 if (status->enc_flags & RX_ENC_FLAG_LDPC)
63c361f5 580 *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0;
51648921
JB		 581 pos++;
582 /* group ID */
583 pos++;
584 /* partial_aid */
585 pos += 2;
586 }
587
99ee7cae
JB		 588 if (local->hw.radiotap_timestamp.units_pos >= 0) {
589 u16 accuracy = 0;
590 u8 flags = IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT;
591
592 rthdr->it_present |=
593 cpu_to_le32(1 << IEEE80211_RADIOTAP_TIMESTAMP);
594
595 /* ensure 8 byte alignment */
596 while ((pos - (u8 *)rthdr) & 7)
597 pos++;
598
599 put_unaligned_le64(status->device_timestamp, pos);
600 pos += sizeof(u64);
601
602 if (local->hw.radiotap_timestamp.accuracy >= 0) {
603 accuracy = local->hw.radiotap_timestamp.accuracy;
604 flags |= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY;
605 }
606 put_unaligned_le16(accuracy, pos);
607 pos += sizeof(u16);
608
609 *pos++ = local->hw.radiotap_timestamp.units_pos;
610 *pos++ = flags;
611 }
612
41cbb0f5
LC		 613 if (status->encoding == RX_ENC_HE &&
614 status->flag & RX_FLAG_RADIOTAP_HE) {
331aead5 615#define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
41cbb0f5
LC		 616
617 if (status->enc_flags & RX_ENC_FLAG_STBC_MASK) {
618 he.data6 |= HE_PREP(DATA6_NSTS,
619 FIELD_GET(RX_ENC_FLAG_STBC_MASK,
620 status->enc_flags));
621 he.data3 |= HE_PREP(DATA3_STBC, 1);
622 } else {
623 he.data6 |= HE_PREP(DATA6_NSTS, status->nss);
624 }
625
626#define CHECK_GI(s) \
627 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
628 (int)NL80211_RATE_INFO_HE_GI_##s)
629
630 CHECK_GI(0_8);
631 CHECK_GI(1_6);
632 CHECK_GI(3_2);
633
634 he.data3 |= HE_PREP(DATA3_DATA_MCS, status->rate_idx);
635 he.data3 |= HE_PREP(DATA3_DATA_DCM, status->he_dcm);
636 he.data3 |= HE_PREP(DATA3_CODING,
637 !!(status->enc_flags & RX_ENC_FLAG_LDPC));
638
639 he.data5 |= HE_PREP(DATA5_GI, status->he_gi);
640
641 switch (status->bw) {
642 case RATE_INFO_BW_20:
643 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
644 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
645 break;
646 case RATE_INFO_BW_40:
647 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
648 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
649 break;
650 case RATE_INFO_BW_80:
651 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
652 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
653 break;
654 case RATE_INFO_BW_160:
655 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
656 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
657 break;
658 case RATE_INFO_BW_HE_RU:
659#define CHECK_RU_ALLOC(s) \
660 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
661 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
662
663 CHECK_RU_ALLOC(26);
664 CHECK_RU_ALLOC(52);
665 CHECK_RU_ALLOC(106);
666 CHECK_RU_ALLOC(242);
667 CHECK_RU_ALLOC(484);
668 CHECK_RU_ALLOC(996);
669 CHECK_RU_ALLOC(2x996);
670
671 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
672 status->he_ru + 4);
673 break;
674 default:
675 WARN_ONCE(1, "Invalid SU BW %d\n", status->bw);
676 }
677
678 /* ensure 2 byte alignment */
679 while ((pos - (u8 *)rthdr) & 1)
680 pos++;
681 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE);
682 memcpy(pos, &he, sizeof(he));
683 pos += sizeof(he);
684 }
685
686 if (status->encoding == RX_ENC_HE &&
687 status->flag & RX_FLAG_RADIOTAP_HE_MU) {
688 /* ensure 2 byte alignment */
689 while ((pos - (u8 *)rthdr) & 1)
690 pos++;
691 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE_MU);
692 memcpy(pos, &he_mu, sizeof(he_mu));
693 pos += sizeof(he_mu);
694 }
695
c3d1f875
ST		 696 if (status->flag & RX_FLAG_NO_PSDU) {
697 rthdr->it_present |=
698 cpu_to_le32(1 << IEEE80211_RADIOTAP_ZERO_LEN_PSDU);
699 *pos++ = status->zero_length_psdu_type;
700 }
701
d1332e7b
ST		 702 if (status->flag & RX_FLAG_RADIOTAP_LSIG) {
703 /* ensure 2 byte alignment */
704 while ((pos - (u8 *)rthdr) & 1)
705 pos++;
706 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_LSIG);
707 memcpy(pos, &lsig, sizeof(lsig));
708 pos += sizeof(lsig);
709 }
710
a144f378
JB		 711 for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) {
712 *pos++ = status->chain_signal[chain];
713 *pos++ = chain;
714 }
1f7bba79
JB		 715
716 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
717 /* ensure 2 byte alignment for the vendor field as required */
718 if ((pos - (u8 *)rthdr) & 1)
719 *pos++ = 0;
720 *pos++ = rtap.oui[0];
721 *pos++ = rtap.oui[1];
722 *pos++ = rtap.oui[2];
723 *pos++ = rtap.subns;
724 put_unaligned_le16(rtap.len, pos);
725 pos += 2;
726 /* align the actual payload as requested */
727 while ((pos - (u8 *)rthdr) & (rtap.align - 1))
728 *pos++ = 0;
729 /* data (and possible padding) already follows */
730 }
601ae7f2
BR		 731}
732
127f60bf
JB		 733static struct sk_buff *
734ieee80211_make_monitor_skb(struct ieee80211_local *local,
735 struct sk_buff **origskb,
736 struct ieee80211_rate *rate,
c096b92a 737 int rtap_space, bool use_origskb)
127f60bf
JB		 738{
739 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(*origskb);
740 int rt_hdrlen, needed_headroom;
741 struct sk_buff *skb;
742
743 /* room for the radiotap header based on driver features */
744 rt_hdrlen = ieee80211_rx_radiotap_hdrlen(local, status, *origskb);
c096b92a 745 needed_headroom = rt_hdrlen - rtap_space;
127f60bf
JB		 746
747 if (use_origskb) {
748 /* only need to expand headroom if necessary */
749 skb = *origskb;
750 *origskb = NULL;
751
752 /*
753 * This shouldn't trigger often because most devices have an
754 * RX header they pull before we get here, and that should
755 * be big enough for our radiotap information. We should
756 * probably export the length to drivers so that we can have
757 * them allocate enough headroom to start with.
758 */
759 if (skb_headroom(skb) < needed_headroom &&
760 pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) {
761 dev_kfree_skb(skb);
762 return NULL;
763 }
764 } else {
765 /*
766 * Need to make a copy and possibly remove radiotap header
767 * and FCS from the original.
768 */
769 skb = skb_copy_expand(*origskb, needed_headroom, 0, GFP_ATOMIC);
770
771 if (!skb)
772 return NULL;
773 }
774
775 /* prepend radiotap information */
776 ieee80211_add_rx_radiotap_header(local, skb, rate, rt_hdrlen, true);
777
778 skb_reset_mac_header(skb);
779 skb->ip_summed = CHECKSUM_UNNECESSARY;
780 skb->pkt_type = PACKET_OTHERHOST;
781 skb->protocol = htons(ETH_P_802_2);
782
783 return skb;
784}
785
b2e7771e
JB		 786/*
787 * This function copies a received frame to all monitor interfaces and
788 * returns a cleaned-up SKB that no longer includes the FCS nor the
789 * radiotap header the driver might have added.
790 */
791static struct sk_buff *
792ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
8318d78a 793 struct ieee80211_rate *rate)
b2e7771e 794{
f1d58c25 795 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb);
b2e7771e 796 struct ieee80211_sub_if_data *sdata;
127f60bf 797 struct sk_buff *monskb = NULL;
b2e7771e 798 int present_fcs_len = 0;
c096b92a 799 unsigned int rtap_space = 0;
42bd20d9
AE		 800 struct ieee80211_sub_if_data *monitor_sdata =
801 rcu_dereference(local->monitor_sdata);
127f60bf 802 bool only_monitor = false;
8020919a 803 unsigned int min_head_len;
1f7bba79 804
41cbb0f5
LC		 805 if (status->flag & RX_FLAG_RADIOTAP_HE)
806 rtap_space += sizeof(struct ieee80211_radiotap_he);
807
808 if (status->flag & RX_FLAG_RADIOTAP_HE_MU)
809 rtap_space += sizeof(struct ieee80211_radiotap_he_mu);
810
d359bbce
IP		 811 if (status->flag & RX_FLAG_RADIOTAP_LSIG)
812 rtap_space += sizeof(struct ieee80211_radiotap_lsig);
813
1f7bba79 814 if (unlikely(status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)) {
d359bbce
IP		 815 struct ieee80211_vendor_radiotap *rtap =
816 (void *)(origskb->data + rtap_space);
1f7bba79 817
c096b92a 818 rtap_space += sizeof(*rtap) + rtap->len + rtap->pad;
1f7bba79 819 }
b2e7771e 820
8020919a
IP		 821 min_head_len = rtap_space;
822
b2e7771e
JB		 823 /*
824 * First, we may need to make a copy of the skb because
825 * (1) we need to modify it for radiotap (if not present), and
826 * (2) the other RX handlers will modify the skb we got.
827 *
828 * We don't need to, of course, if we aren't going to return
829 * the SKB because it has a bad FCS/PLCP checksum.
830 */
0869aea0 831
8020919a
IP		 832 if (!(status->flag & RX_FLAG_NO_PSDU)) {
833 if (ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) {
834 if (unlikely(origskb->len <= FCS_LEN + rtap_space)) {
835 /* driver bug */
836 WARN_ON(1);
837 dev_kfree_skb(origskb);
838 return NULL;
839 }
840 present_fcs_len = FCS_LEN;
30841f5c 841 }
8020919a
IP		 842
843 /* also consider the hdr->frame_control */
844 min_head_len += 2;
30841f5c 845 }
b2e7771e 846
8020919a
IP		 847 /* ensure that the expected data elements are in skb head */
848 if (!pskb_may_pull(origskb, min_head_len)) {
e3cf8b3f
ZY		 849 dev_kfree_skb(origskb);
850 return NULL;
851 }
852
c096b92a 853 only_monitor = should_drop_frame(origskb, present_fcs_len, rtap_space);
127f60bf 854
17883048 855 if (!local->monitors || (status->flag & RX_FLAG_SKIP_MONITOR)) {
127f60bf 856 if (only_monitor) {
b2e7771e
JB		 857 dev_kfree_skb(origskb);
858 return NULL;
859 }
860
c1129924
JB		 861 return ieee80211_clean_skb(origskb, present_fcs_len,
862 rtap_space);
b2e7771e
JB		 863 }
864
c096b92a 865 ieee80211_handle_mu_mimo_mon(monitor_sdata, origskb, rtap_space);
9e478066 866
f64331d5 867 list_for_each_entry_rcu(sdata, &local->mon_list, u.mntr.list) {
127f60bf
JB		 868 bool last_monitor = list_is_last(&sdata->u.mntr.list,
869 &local->mon_list);
870
871 if (!monskb)
872 monskb = ieee80211_make_monitor_skb(local, &origskb,
c096b92a 873 rate, rtap_space,
127f60bf
JB		 874 only_monitor &&
875 last_monitor);
876
877 if (monskb) {
878 struct sk_buff *skb;
879
880 if (last_monitor) {
881 skb = monskb;
882 monskb = NULL;
883 } else {
884 skb = skb_clone(monskb, GFP_ATOMIC);
885 }
886
887 if (skb) {
888 skb->dev = sdata->dev;
889 ieee80211_rx_stats(skb->dev, skb->len);
890 netif_receive_skb(skb);
b2e7771e
JB		 891 }
892 }
893
127f60bf
JB		 894 if (last_monitor)
895 break;
b2e7771e
JB		 896 }
897
127f60bf
JB		 898 /* this happens if last_monitor was erroneously false */
899 dev_kfree_skb(monskb);
900
901 /* ditto */
902 if (!origskb)
903 return NULL;
b2e7771e 904
c1129924 905 return ieee80211_clean_skb(origskb, present_fcs_len, rtap_space);
b2e7771e
JB		 906}
907
5cf121c3 908static void ieee80211_parse_qos(struct ieee80211_rx_data *rx)
6e0d114d 909{
238f74a2 910 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
554891e6 911 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
9e26297a 912 int tid, seqno_idx, security_idx;
6e0d114d
JB		 913
914 /* does the frame have a qos control field? */
238f74a2
HH		 915 if (ieee80211_is_data_qos(hdr->frame_control)) {
916 u8 *qc = ieee80211_get_qos_ctl(hdr);
6e0d114d 917 /* frame has qos control */
238f74a2 918 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
04b7dcf9 919 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
554891e6 920 status->rx_flags |= IEEE80211_RX_AMSDU;
9e26297a
JB		 921
922 seqno_idx = tid;
923 security_idx = tid;
6e0d114d 924 } else {
1411f9b5
JB		 925 /*
926 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
927 *
928 * Sequence numbers for management frames, QoS data
929 * frames with a broadcast/multicast address in the
930 * Address 1 field, and all non-QoS data frames sent
931 * by QoS STAs are assigned using an additional single
932 * modulo-4096 counter, [...]
933 *
934 * We also use that counter for non-QoS STAs.
935 */
5a306f58 936 seqno_idx = IEEE80211_NUM_TIDS;
9e26297a
JB		 937 security_idx = 0;
938 if (ieee80211_is_mgmt(hdr->frame_control))
5a306f58 939 security_idx = IEEE80211_NUM_TIDS;
9e26297a 940 tid = 0;
6e0d114d 941 }
52865dfd 942
9e26297a
JB		 943 rx->seqno_idx = seqno_idx;
944 rx->security_idx = security_idx;
6e0d114d
JB		 945 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
946 * For now, set skb->priority to 0 for other cases. */
947 rx->skb->priority = (tid > 7) ? 0 : tid;
38f3714d 948}
6e0d114d 949
d1c3a37c
JB		 950/**
951 * DOC: Packet alignment
952 *
953 * Drivers always need to pass packets that are aligned to two-byte boundaries
954 * to the stack.
955 *
956 * Additionally, should, if possible, align the payload data in a way that
957 * guarantees that the contained IP header is aligned to a four-byte
958 * boundary. In the case of regular frames, this simply means aligning the
959 * payload to a four-byte boundary (because either the IP header is directly
960 * contained, or IV/RFC1042 headers that have a length divisible by four are
59d9cb07
KV		 961 * in front of it). If the payload data is not properly aligned and the
962 * architecture doesn't support efficient unaligned operations, mac80211
963 * will align the data.
d1c3a37c
JB		 964 *
965 * With A-MSDU frames, however, the payload data address must yield two modulo
966 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
967 * push the IP header further back to a multiple of four again. Thankfully, the
968 * specs were sane enough this time around to require padding each A-MSDU
969 * subframe to a length that is a multiple of four.
970 *
25985edc 971 * Padding like Atheros hardware adds which is between the 802.11 header and
d1c3a37c
JB		 972 * the payload is not supported, the driver is required to move the 802.11
973 * header to be directly in front of the payload in that case.
974 */
975static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx)
38f3714d 976{
59d9cb07 977#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
441275e1 978 WARN_ON_ONCE((unsigned long)rx->skb->data & 1);
d1c3a37c 979#endif
6e0d114d
JB		 980}
981
6368e4b1 982
571ecf67
JB		 983/* rx handlers */
984
3cfcf6ac
JM		 985static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb)
986{
987 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
988
d8ca16db 989 if (is_multicast_ether_addr(hdr->addr1))
3cfcf6ac
JM		 990 return 0;
991
d8ca16db 992 return ieee80211_is_robust_mgmt_frame(skb);
3cfcf6ac
JM		 993}
994
995
996static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb)
997{
998 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
999
d8ca16db 1000 if (!is_multicast_ether_addr(hdr->addr1))
3cfcf6ac
JM		 1001 return 0;
1002
d8ca16db 1003 return ieee80211_is_robust_mgmt_frame(skb);
3cfcf6ac
JM		 1004}
1005
1006
1007/* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
1008static int ieee80211_get_mmie_keyidx(struct sk_buff *skb)
1009{
1010 struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data;
1011 struct ieee80211_mmie *mmie;
56c52da2 1012 struct ieee80211_mmie_16 *mmie16;
3cfcf6ac 1013
1df332e8 1014 if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da))
3cfcf6ac
JM		 1015 return -1;
1016
af2d14b0
JM		 1017 if (!ieee80211_is_robust_mgmt_frame(skb) &&
1018 !ieee80211_is_beacon(hdr->frame_control))
3cfcf6ac
JM		 1019 return -1; /* not a robust management frame */
1020
1021 mmie = (struct ieee80211_mmie *)
1022 (skb->data + skb->len - sizeof(*mmie));
56c52da2
JM		 1023 if (mmie->element_id == WLAN_EID_MMIE &&
1024 mmie->length == sizeof(*mmie) - 2)
1025 return le16_to_cpu(mmie->key_id);
1026
1027 mmie16 = (struct ieee80211_mmie_16 *)
1028 (skb->data + skb->len - sizeof(*mmie16));
1029 if (skb->len >= 24 + sizeof(*mmie16) &&
1030 mmie16->element_id == WLAN_EID_MMIE &&
1031 mmie16->length == sizeof(*mmie16) - 2)
1032 return le16_to_cpu(mmie16->key_id);
1033
1034 return -1;
3cfcf6ac
JM		 1035}
1036
96fc6efb
AW		 1037static int ieee80211_get_keyid(struct sk_buff *skb,
1038 const struct ieee80211_cipher_scheme *cs)
2475b1cc
MS		 1039{
1040 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1041 __le16 fc;
1042 int hdrlen;
96fc6efb
AW		 1043 int minlen;
1044 u8 key_idx_off;
1045 u8 key_idx_shift;
2475b1cc
MS		 1046 u8 keyid;
1047
1048 fc = hdr->frame_control;
1049 hdrlen = ieee80211_hdrlen(fc);
1050
96fc6efb
AW		 1051 if (cs) {
1052 minlen = hdrlen + cs->hdr_len;
1053 key_idx_off = hdrlen + cs->key_idx_off;
1054 key_idx_shift = cs->key_idx_shift;
1055 } else {
1056 /* WEP, TKIP, CCMP and GCMP */
1057 minlen = hdrlen + IEEE80211_WEP_IV_LEN;
1058 key_idx_off = hdrlen + 3;
1059 key_idx_shift = 6;
1060 }
1061
1062 if (unlikely(skb->len < minlen))
2475b1cc
MS		 1063 return -EINVAL;
1064
96fc6efb
AW		 1065 skb_copy_bits(skb, key_idx_off, &keyid, 1);
1066
1067 if (cs)
1068 keyid &= cs->key_idx_mask;
1069 keyid >>= key_idx_shift;
1070
1071 /* cs could use more than the usual two bits for the keyid */
1072 if (unlikely(keyid >= NUM_DEFAULT_KEYS))
1073 return -EINVAL;
2475b1cc
MS		 1074
1075 return keyid;
1076}
1077
1df332e8 1078static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
33b64eb2 1079{
a7767f95 1080 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
47846c9b 1081 char *dev_addr = rx->sdata->vif.addr;
d6d1a5a7 1082
a7767f95 1083 if (ieee80211_is_data(hdr->frame_control)) {
3c5772a5
JC		 1084 if (is_multicast_ether_addr(hdr->addr1)) {
1085 if (ieee80211_has_tods(hdr->frame_control) ||
1df332e8 1086 !ieee80211_has_fromds(hdr->frame_control))
3c5772a5 1087 return RX_DROP_MONITOR;
b203ca39 1088 if (ether_addr_equal(hdr->addr3, dev_addr))
3c5772a5
JC		 1089 return RX_DROP_MONITOR;
1090 } else {
1091 if (!ieee80211_has_a4(hdr->frame_control))
1092 return RX_DROP_MONITOR;
b203ca39 1093 if (ether_addr_equal(hdr->addr4, dev_addr))
3c5772a5
JC		 1094 return RX_DROP_MONITOR;
1095 }
33b64eb2
LCC		 1096 }
1097
1098 /* If there is not an established peer link and this is not a peer link
1099 * establisment frame, beacon or probe, drop the frame.
1100 */
1101
57cf8043 1102 if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) {
33b64eb2 1103 struct ieee80211_mgmt *mgmt;
d6d1a5a7 1104
a7767f95 1105 if (!ieee80211_is_mgmt(hdr->frame_control))
33b64eb2
LCC		 1106 return RX_DROP_MONITOR;
1107
a7767f95 1108 if (ieee80211_is_action(hdr->frame_control)) {
d3aaec8a 1109 u8 category;
9b395bc3
JB		 1110
1111 /* make sure category field is present */
1112 if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE)
1113 return RX_DROP_MONITOR;
1114
33b64eb2 1115 mgmt = (struct ieee80211_mgmt *)hdr;
d3aaec8a
JC		 1116 category = mgmt->u.action.category;
1117 if (category != WLAN_CATEGORY_MESH_ACTION &&
1df332e8 1118 category != WLAN_CATEGORY_SELF_PROTECTED)
33b64eb2 1119 return RX_DROP_MONITOR;
33b64eb2 1120 return RX_CONTINUE;
33b64eb2
LCC		 1121 }
1122
a7767f95
HH		 1123 if (ieee80211_is_probe_req(hdr->frame_control) ||
1124 ieee80211_is_probe_resp(hdr->frame_control) ||
71839121
JC		 1125 ieee80211_is_beacon(hdr->frame_control) ||
1126 ieee80211_is_auth(hdr->frame_control))
a7767f95
HH		 1127 return RX_CONTINUE;
1128
1129 return RX_DROP_MONITOR;
a7767f95
HH		 1130 }
1131
902acc78
JB		 1132 return RX_CONTINUE;
1133}
33b64eb2 1134
fb4ea054
JB		 1135static inline bool ieee80211_rx_reorder_ready(struct tid_ampdu_rx *tid_agg_rx,
1136 int index)
1137{
1138 struct sk_buff_head *frames = &tid_agg_rx->reorder_buf[index];
1139 struct sk_buff *tail = skb_peek_tail(frames);
1140 struct ieee80211_rx_status *status;
1141
06470f74
SS		 1142 if (tid_agg_rx->reorder_buf_filtered & BIT_ULL(index))
1143 return true;
1144
fb4ea054
JB		 1145 if (!tail)
1146 return false;
1147
1148 status = IEEE80211_SKB_RXCB(tail);
1149 if (status->flag & RX_FLAG_AMSDU_MORE)
1150 return false;
1151
1152 return true;
1153}
1154
d3b2fb53 1155static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata,
1edfb1af 1156 struct tid_ampdu_rx *tid_agg_rx,
f9e124fb
CL		 1157 int index,
1158 struct sk_buff_head *frames)
1edfb1af 1159{
83eb935e
MK		 1160 struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index];
1161 struct sk_buff *skb;
4cfda47b 1162 struct ieee80211_rx_status *status;
1edfb1af 1163
dd318575
JB		 1164 lockdep_assert_held(&tid_agg_rx->reorder_lock);
1165
83eb935e 1166 if (skb_queue_empty(skb_list))
1edfb1af
JB		 1167 goto no_frame;
1168
fb4ea054 1169 if (!ieee80211_rx_reorder_ready(tid_agg_rx, index)) {
83eb935e
MK		 1170 __skb_queue_purge(skb_list);
1171 goto no_frame;
1172 }
1173
1174 /* release frames from the reorder ring buffer */
1edfb1af 1175 tid_agg_rx->stored_mpdu_num--;
83eb935e
MK		 1176 while ((skb = __skb_dequeue(skb_list))) {
1177 status = IEEE80211_SKB_RXCB(skb);
1178 status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE;
1179 __skb_queue_tail(frames, skb);
1180 }
1edfb1af
JB		 1181
1182no_frame:
06470f74 1183 tid_agg_rx->reorder_buf_filtered &= ~BIT_ULL(index);
9a886586 1184 tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num);
1edfb1af
JB		 1185}
1186
d3b2fb53 1187static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata,
1edfb1af 1188 struct tid_ampdu_rx *tid_agg_rx,
f9e124fb
CL		 1189 u16 head_seq_num,
1190 struct sk_buff_head *frames)
1edfb1af
JB		 1191{
1192 int index;
1193
dd318575
JB		 1194 lockdep_assert_held(&tid_agg_rx->reorder_lock);
1195
9a886586 1196 while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) {
2e3049b7 1197 index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
f9e124fb
CL		 1198 ieee80211_release_reorder_frame(sdata, tid_agg_rx, index,
1199 frames);
1edfb1af
JB		 1200 }
1201}
1202
1203/*
1204 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
1205 * the skb was added to the buffer longer than this time ago, the earlier
1206 * frames that have not yet been received are assumed to be lost and the skb
1207 * can be released for processing. This may also release other skb's from the
1208 * reorder buffer if there are no additional gaps between the frames.
2bff8ebf
CL		 1209 *
1210 * Callers must hold tid_agg_rx->reorder_lock.
1edfb1af
JB		 1211 */
1212#define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
1213
d3b2fb53 1214static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata,
f9e124fb
CL		 1215 struct tid_ampdu_rx *tid_agg_rx,
1216 struct sk_buff_head *frames)
aa0c8636 1217{
83eb935e 1218 int index, i, j;
aa0c8636 1219
dd318575
JB		 1220 lockdep_assert_held(&tid_agg_rx->reorder_lock);
1221
aa0c8636 1222 /* release the buffer until next missing frame */
2e3049b7 1223 index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
fb4ea054 1224 if (!ieee80211_rx_reorder_ready(tid_agg_rx, index) &&
07ae2dfc 1225 tid_agg_rx->stored_mpdu_num) {
aa0c8636
CL		 1226 /*
1227 * No buffers ready to be released, but check whether any
1228 * frames in the reorder buffer have timed out.
1229 */
aa0c8636
CL		 1230 int skipped = 1;
1231 for (j = (index + 1) % tid_agg_rx->buf_size; j != index;
1232 j = (j + 1) % tid_agg_rx->buf_size) {
fb4ea054 1233 if (!ieee80211_rx_reorder_ready(tid_agg_rx, j)) {
aa0c8636
CL		 1234 skipped++;
1235 continue;
1236 }
499fe9a4
DH		 1237 if (skipped &&
1238 !time_after(jiffies, tid_agg_rx->reorder_time[j] +
aa0c8636 1239 HT_RX_REORDER_BUF_TIMEOUT))
2bff8ebf 1240 goto set_release_timer;
aa0c8636 1241
83eb935e
MK		 1242 /* don't leave incomplete A-MSDUs around */
1243 for (i = (index + 1) % tid_agg_rx->buf_size; i != j;
1244 i = (i + 1) % tid_agg_rx->buf_size)
1245 __skb_queue_purge(&tid_agg_rx->reorder_buf[i]);
1246
bdcbd8e0
JB		 1247 ht_dbg_ratelimited(sdata,
1248 "release an RX reorder frame due to timeout on earlier frames\n");
f9e124fb
CL		 1249 ieee80211_release_reorder_frame(sdata, tid_agg_rx, j,
1250 frames);
aa0c8636
CL		 1251
1252 /*
1253 * Increment the head seq# also for the skipped slots.
1254 */
1255 tid_agg_rx->head_seq_num =
9a886586
JB		 1256 (tid_agg_rx->head_seq_num +
1257 skipped) & IEEE80211_SN_MASK;
aa0c8636
CL		 1258 skipped = 0;
1259 }
fb4ea054 1260 } else while (ieee80211_rx_reorder_ready(tid_agg_rx, index)) {
f9e124fb
CL		 1261 ieee80211_release_reorder_frame(sdata, tid_agg_rx, index,
1262 frames);
2e3049b7 1263 index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
aa0c8636 1264 }
2bff8ebf
CL		 1265
1266 if (tid_agg_rx->stored_mpdu_num) {
2e3049b7 1267 j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
2bff8ebf
CL		 1268
1269 for (; j != (index - 1) % tid_agg_rx->buf_size;
1270 j = (j + 1) % tid_agg_rx->buf_size) {
fb4ea054 1271 if (ieee80211_rx_reorder_ready(tid_agg_rx, j))
2bff8ebf
CL		 1272 break;
1273 }
1274
1275 set_release_timer:
1276
788211d8
JB		 1277 if (!tid_agg_rx->removed)
1278 mod_timer(&tid_agg_rx->reorder_timer,
1279 tid_agg_rx->reorder_time[j] + 1 +
1280 HT_RX_REORDER_BUF_TIMEOUT);
2bff8ebf
CL		 1281 } else {
1282 del_timer(&tid_agg_rx->reorder_timer);
1283 }
aa0c8636
CL		 1284}
1285
1edfb1af
JB		 1286/*
1287 * As this function belongs to the RX path it must be under
1288 * rcu_read_lock protection. It returns false if the frame
1289 * can be processed immediately, true if it was consumed.
1290 */
d3b2fb53 1291static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata,
1edfb1af 1292 struct tid_ampdu_rx *tid_agg_rx,
f9e124fb
CL		 1293 struct sk_buff *skb,
1294 struct sk_buff_head *frames)
1edfb1af
JB		 1295{
1296 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
83eb935e 1297 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1edfb1af
JB		 1298 u16 sc = le16_to_cpu(hdr->seq_ctrl);
1299 u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
1300 u16 head_seq_num, buf_size;
1301 int index;
2bff8ebf 1302 bool ret = true;
1edfb1af 1303
dd318575
JB		 1304 spin_lock(&tid_agg_rx->reorder_lock);
1305
4549cf2b
MK		 1306 /*
1307 * Offloaded BA sessions have no known starting sequence number so pick
1308 * one from first Rxed frame for this tid after BA was started.
1309 */
1310 if (unlikely(tid_agg_rx->auto_seq)) {
1311 tid_agg_rx->auto_seq = false;
1312 tid_agg_rx->ssn = mpdu_seq_num;
1313 tid_agg_rx->head_seq_num = mpdu_seq_num;
1314 }
1315
1edfb1af
JB		 1316 buf_size = tid_agg_rx->buf_size;
1317 head_seq_num = tid_agg_rx->head_seq_num;
1318
b7540d8f
SS		 1319 /*
1320 * If the current MPDU's SN is smaller than the SSN, it shouldn't
1321 * be reordered.
1322 */
1323 if (unlikely(!tid_agg_rx->started)) {
1324 if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) {
1325 ret = false;
1326 goto out;
1327 }
1328 tid_agg_rx->started = true;
1329 }
1330
1edfb1af 1331 /* frame with out of date sequence number */
9a886586 1332 if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) {
1edfb1af 1333 dev_kfree_skb(skb);
2bff8ebf 1334 goto out;
1edfb1af
JB		 1335 }
1336
1337 /*
1338 * If frame the sequence number exceeds our buffering window
1339 * size release some previous frames to make room for this one.
1340 */
9a886586
JB		 1341 if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) {
1342 head_seq_num = ieee80211_sn_inc(
1343 ieee80211_sn_sub(mpdu_seq_num, buf_size));
1edfb1af 1344 /* release stored frames up to new head to stack */
d3b2fb53 1345 ieee80211_release_reorder_frames(sdata, tid_agg_rx,
f9e124fb 1346 head_seq_num, frames);
1edfb1af
JB		 1347 }
1348
1349 /* Now the new frame is always in the range of the reordering buffer */
1350
2e3049b7 1351 index = mpdu_seq_num % tid_agg_rx->buf_size;
1edfb1af
JB		 1352
1353 /* check if we already stored this frame */
fb4ea054 1354 if (ieee80211_rx_reorder_ready(tid_agg_rx, index)) {
1edfb1af 1355 dev_kfree_skb(skb);
2bff8ebf 1356 goto out;
1edfb1af
JB		 1357 }
1358
1359 /*
1360 * If the current MPDU is in the right order and nothing else
1361 * is stored we can process it directly, no need to buffer it.
c835b214
JB		 1362 * If it is first but there's something stored, we may be able
1363 * to release frames after this one.
1edfb1af
JB		 1364 */
1365 if (mpdu_seq_num == tid_agg_rx->head_seq_num &&
1366 tid_agg_rx->stored_mpdu_num == 0) {
83eb935e
MK		 1367 if (!(status->flag & RX_FLAG_AMSDU_MORE))
1368 tid_agg_rx->head_seq_num =
1369 ieee80211_sn_inc(tid_agg_rx->head_seq_num);
2bff8ebf
CL		 1370 ret = false;
1371 goto out;
1edfb1af
JB		 1372 }
1373
1374 /* put the frame in the reordering buffer */
83eb935e
MK		 1375 __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb);
1376 if (!(status->flag & RX_FLAG_AMSDU_MORE)) {
1377 tid_agg_rx->reorder_time[index] = jiffies;
1378 tid_agg_rx->stored_mpdu_num++;
1379 ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames);
1380 }
1edfb1af 1381
2bff8ebf
CL		 1382 out:
1383 spin_unlock(&tid_agg_rx->reorder_lock);
1384 return ret;
1edfb1af
JB		 1385}
1386
1387/*
1388 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
1389 * true if the MPDU was buffered, false if it should be processed.
1390 */
f9e124fb
CL		 1391static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx,
1392 struct sk_buff_head *frames)
1edfb1af 1393{
2569a826
JB		 1394 struct sk_buff *skb = rx->skb;
1395 struct ieee80211_local *local = rx->local;
1edfb1af 1396 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2569a826 1397 struct sta_info *sta = rx->sta;
1edfb1af
JB		 1398 struct tid_ampdu_rx *tid_agg_rx;
1399 u16 sc;
6cc00d54 1400 u8 tid, ack_policy;
1edfb1af 1401
051a41fa
JB		 1402 if (!ieee80211_is_data_qos(hdr->frame_control) ||
1403 is_multicast_ether_addr(hdr->addr1))
2569a826 1404 goto dont_reorder;
1edfb1af
JB		 1405
1406 /*
1407 * filter the QoS data rx stream according to
1408 * STA/TID and check if this STA/TID is on aggregation
1409 */
1410
1edfb1af 1411 if (!sta)
2569a826 1412 goto dont_reorder;
1edfb1af 1413
6cc00d54
TP		 1414 ack_policy = *ieee80211_get_qos_ctl(hdr) &
1415 IEEE80211_QOS_CTL_ACK_POLICY_MASK;
a1f2ba04 1416 tid = ieee80211_get_tid(hdr);
1edfb1af 1417
a87f736d 1418 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
bfe40fa3
JB		 1419 if (!tid_agg_rx) {
1420 if (ack_policy == IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK &&
1421 !test_bit(tid, rx->sta->ampdu_mlme.agg_session_valid) &&
1422 !test_and_set_bit(tid, rx->sta->ampdu_mlme.unexpected_agg))
1423 ieee80211_send_delba(rx->sdata, rx->sta->sta.addr, tid,
1424 WLAN_BACK_RECIPIENT,
1425 WLAN_REASON_QSTA_REQUIRE_SETUP);
a87f736d 1426 goto dont_reorder;
bfe40fa3 1427 }
1edfb1af
JB		 1428
1429 /* qos null data frames are excluded */
1430 if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC)))
a87f736d 1431 goto dont_reorder;
1edfb1af 1432
6cc00d54
TP		 1433 /* not part of a BA session */
1434 if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK &&
1435 ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL)
1436 goto dont_reorder;
1437
1edfb1af
JB		 1438 /* new, potentially un-ordered, ampdu frame - process it */
1439
1440 /* reset session timer */
1441 if (tid_agg_rx->timeout)
12d3952f 1442 tid_agg_rx->last_rx = jiffies;
1edfb1af
JB		 1443
1444 /* if this mpdu is fragmented - terminate rx aggregation session */
1445 sc = le16_to_cpu(hdr->seq_ctrl);
1446 if (sc & IEEE80211_SCTL_FRAG) {
344eec67
JB		 1447 skb_queue_tail(&rx->sdata->skb_queue, skb);
1448 ieee80211_queue_work(&local->hw, &rx->sdata->work);
2569a826 1449 return;
1edfb1af
JB		 1450 }
1451
a87f736d
JB		 1452 /*
1453 * No locking needed -- we will only ever process one
1454 * RX packet at a time, and thus own tid_agg_rx. All
1455 * other code manipulating it needs to (and does) make
1456 * sure that we cannot get to it any more before doing
1457 * anything with it.
1458 */
f9e124fb
CL		 1459 if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb,
1460 frames))
2569a826
JB		 1461 return;
1462
1463 dont_reorder:
f9e124fb 1464 __skb_queue_tail(frames, skb);
1edfb1af 1465}
33b64eb2 1466
49461622 1467static ieee80211_rx_result debug_noinline
0395442a 1468ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx)
571ecf67 1469{
a7767f95 1470 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
554891e6 1471 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
571ecf67 1472
f9cfa5f3
SS		 1473 if (status->flag & RX_FLAG_DUP_VALIDATED)
1474 return RX_CONTINUE;
1475
6b0f3274
JB		 1476 /*
1477 * Drop duplicate 802.11 retransmissions
1478 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
1479 */
0395442a
JB		 1480
1481 if (rx->skb->len < 24)
1482 return RX_CONTINUE;
1483
1484 if (ieee80211_is_ctl(hdr->frame_control) ||
30b2f0be 1485 ieee80211_is_any_nullfunc(hdr->frame_control) ||
0395442a
JB		 1486 is_multicast_ether_addr(hdr->addr1))
1487 return RX_CONTINUE;
1488
a732fa70
JB		 1489 if (!rx->sta)
1490 return RX_CONTINUE;
1491
1492 if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
1493 rx->sta->last_seq_ctrl[rx->seqno_idx] == hdr->seq_ctrl)) {
1494 I802_DEBUG_INC(rx->local->dot11FrameDuplicateCount);
e5a9f8d0 1495 rx->sta->rx_stats.num_duplicates++;
a732fa70
JB		 1496 return RX_DROP_UNUSABLE;
1497 } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) {
1498 rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl;
571ecf67
JB		 1499 }
1500
0395442a
JB		 1501 return RX_CONTINUE;
1502}
1503
1504static ieee80211_rx_result debug_noinline
1505ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
1506{
1507 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
1508
571ecf67
JB		 1509 /* Drop disallowed frame classes based on STA auth/assoc state;
1510 * IEEE 802.11, Chap 5.5.
1511 *
ccd7b362
JB		 1512 * mac80211 filters only based on association state, i.e. it drops
1513 * Class 3 frames from not associated stations. hostapd sends
571ecf67
JB		 1514 * deauth/disassoc frames when needed. In addition, hostapd is
1515 * responsible for filtering on both auth and assoc states.
1516 */
33b64eb2 1517
902acc78 1518 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
33b64eb2 1519 return ieee80211_rx_mesh_check(rx);
33b64eb2 1520
a7767f95
HH		 1521 if (unlikely((ieee80211_is_data(hdr->frame_control) ||
1522 ieee80211_is_pspoll(hdr->frame_control)) &&
05c914fe 1523 rx->sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1be7fe8d 1524 rx->sdata->vif.type != NL80211_IFTYPE_WDS &&
239281f8 1525 rx->sdata->vif.type != NL80211_IFTYPE_OCB &&
c2c98fde 1526 (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) {
7852e361
JB		 1527 /*
1528 * accept port control frames from the AP even when it's not
1529 * yet marked ASSOC to prevent a race where we don't set the
1530 * assoc bit quickly enough before it sends the first frame
1531 */
1532 if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
2a33bee2 1533 ieee80211_is_data_present(hdr->frame_control)) {
6dbda2d0
JB		 1534 unsigned int hdrlen;
1535 __be16 ethertype;
1536
1537 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1538
1539 if (rx->skb->len < hdrlen + 8)
1540 return RX_DROP_MONITOR;
1541
1542 skb_copy_bits(rx->skb, hdrlen + 6, &ethertype, 2);
1543 if (ethertype == rx->sdata->control_port_protocol)
2a33bee2
GE		 1544 return RX_CONTINUE;
1545 }
21fc7560
JB		 1546
1547 if (rx->sdata->vif.type == NL80211_IFTYPE_AP &&
1548 cfg80211_rx_spurious_frame(rx->sdata->dev,
1549 hdr->addr2,
1550 GFP_ATOMIC))
1551 return RX_DROP_UNUSABLE;
1552
e4c26add 1553 return RX_DROP_MONITOR;
2a33bee2 1554 }
571ecf67 1555
9ae54c84 1556 return RX_CONTINUE;
570bd537
JB		 1557}
1558
1559
572e0012
KV		 1560static ieee80211_rx_result debug_noinline
1561ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx)
1562{
1563 struct ieee80211_local *local;
1564 struct ieee80211_hdr *hdr;
1565 struct sk_buff *skb;
1566
1567 local = rx->local;
1568 skb = rx->skb;
1569 hdr = (struct ieee80211_hdr *) skb->data;
1570
1571 if (!local->pspolling)
1572 return RX_CONTINUE;
1573
1574 if (!ieee80211_has_fromds(hdr->frame_control))
1575 /* this is not from AP */
1576 return RX_CONTINUE;
1577
1578 if (!ieee80211_is_data(hdr->frame_control))
1579 return RX_CONTINUE;
1580
1581 if (!ieee80211_has_moredata(hdr->frame_control)) {
1582 /* AP has no more frames buffered for us */
1583 local->pspolling = false;
1584 return RX_CONTINUE;
1585 }
1586
1587 /* more data bit is set, let's request a new frame from the AP */
1588 ieee80211_send_pspoll(local, rx->sdata);
1589
1590 return RX_CONTINUE;
1591}
1592
d012a605 1593static void sta_ps_start(struct sta_info *sta)
571ecf67 1594{
133b8226 1595 struct ieee80211_sub_if_data *sdata = sta->sdata;
4571d3bf 1596 struct ieee80211_local *local = sdata->local;
d012a605 1597 struct ps_data *ps;
ba8c3d6f 1598 int tid;
0795af57 1599
d012a605
MP		 1600 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1601 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1602 ps = &sdata->bss->ps;
1603 else
1604 return;
1605
1606 atomic_inc(&ps->num_sta_ps);
c2c98fde 1607 set_sta_flag(sta, WLAN_STA_PS_STA);
30686bf7 1608 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
d057e5a3 1609 drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta);
bdcbd8e0
JB		 1610 ps_dbg(sdata, "STA %pM aid %d enters power save mode\n",
1611 sta->sta.addr, sta->sta.aid);
ba8c3d6f 1612
17c18bf8
JB		 1613 ieee80211_clear_fast_xmit(sta);
1614
ba8c3d6f
FF		 1615 if (!sta->sta.txq[0])
1616 return;
1617
adf8ed01 1618 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
b49c15e1
FF		 1619 struct ieee80211_txq *txq = sta->sta.txq[tid];
1620 struct txq_info *txqi = to_txq_info(txq);
1621
1622 spin_lock(&local->active_txq_lock[txq->ac]);
1623 if (!list_empty(&txqi->schedule_order))
1624 list_del_init(&txqi->schedule_order);
1625 spin_unlock(&local->active_txq_lock[txq->ac]);
1626
1627 if (txq_has_queue(txq))
ba8c3d6f
FF		 1628 set_bit(tid, &sta->txq_buffered_tids);
1629 else
1630 clear_bit(tid, &sta->txq_buffered_tids);
1631 }
571ecf67
JB		 1632}
1633
d012a605 1634static void sta_ps_end(struct sta_info *sta)
571ecf67 1635{
bdcbd8e0
JB		 1636 ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n",
1637 sta->sta.addr, sta->sta.aid);
004c872e 1638
c2c98fde 1639 if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
e3685e03
JB		 1640 /*
1641 * Clear the flag only if the other one is still set
1642 * so that the TX path won't start TX'ing new frames
1643 * directly ... In the case that the driver flag isn't
1644 * set ieee80211_sta_ps_deliver_wakeup() will clear it.
1645 */
1646 clear_sta_flag(sta, WLAN_STA_PS_STA);
bdcbd8e0
JB		 1647 ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n",
1648 sta->sta.addr, sta->sta.aid);
af818581
JB		 1649 return;
1650 }
1651
5ac2e350
JB		 1652 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1653 clear_sta_flag(sta, WLAN_STA_PS_STA);
af818581 1654 ieee80211_sta_ps_deliver_wakeup(sta);
571ecf67
JB		 1655}
1656
cf47161a 1657int ieee80211_sta_ps_transition(struct ieee80211_sta *pubsta, bool start)
d057e5a3 1658{
cf47161a 1659 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
d057e5a3
AN		 1660 bool in_ps;
1661
cf47161a 1662 WARN_ON(!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS));
d057e5a3
AN		 1663
1664 /* Don't let the same PS state be set twice */
cf47161a 1665 in_ps = test_sta_flag(sta, WLAN_STA_PS_STA);
d057e5a3
AN		 1666 if ((start && in_ps) || (!start && !in_ps))
1667 return -EINVAL;
1668
1669 if (start)
cf47161a 1670 sta_ps_start(sta);
d057e5a3 1671 else
cf47161a 1672 sta_ps_end(sta);
d057e5a3
AN		 1673
1674 return 0;
1675}
1676EXPORT_SYMBOL(ieee80211_sta_ps_transition);
1677
46fa38e8
JB		 1678void ieee80211_sta_pspoll(struct ieee80211_sta *pubsta)
1679{
1680 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1681
1682 if (test_sta_flag(sta, WLAN_STA_SP))
1683 return;
1684
1685 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1686 ieee80211_sta_ps_deliver_poll_response(sta);
1687 else
1688 set_sta_flag(sta, WLAN_STA_PSPOLL);
1689}
1690EXPORT_SYMBOL(ieee80211_sta_pspoll);
1691
1692void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *pubsta, u8 tid)
1693{
1694 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
731977e9 1695 int ac = ieee80211_ac_from_tid(tid);
46fa38e8
JB		 1696
1697 /*
0aa419ec
EG		 1698 * If this AC is not trigger-enabled do nothing unless the
1699 * driver is calling us after it already checked.
46fa38e8
JB		 1700 *
1701 * NB: This could/should check a separate bitmap of trigger-
1702 * enabled queues, but for now we only implement uAPSD w/o
1703 * TSPEC changes to the ACs, so they're always the same.
1704 */
f438ceb8
EG		 1705 if (!(sta->sta.uapsd_queues & ieee80211_ac_to_qos_mask[ac]) &&
1706 tid != IEEE80211_NUM_TIDS)
46fa38e8
JB		 1707 return;
1708
1709 /* if we are in a service period, do nothing */
1710 if (test_sta_flag(sta, WLAN_STA_SP))
1711 return;
1712
1713 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1714 ieee80211_sta_ps_deliver_uapsd(sta);
1715 else
1716 set_sta_flag(sta, WLAN_STA_UAPSD);
1717}
1718EXPORT_SYMBOL(ieee80211_sta_uapsd_trigger);
1719
47086fc5
JB		 1720static ieee80211_rx_result debug_noinline
1721ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx)
1722{
1723 struct ieee80211_sub_if_data *sdata = rx->sdata;
1724 struct ieee80211_hdr *hdr = (void *)rx->skb->data;
1725 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
47086fc5 1726
5c90067c 1727 if (!rx->sta)
47086fc5
JB		 1728 return RX_CONTINUE;
1729
1730 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1731 sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
1732 return RX_CONTINUE;
1733
1734 /*
1735 * The device handles station powersave, so don't do anything about
1736 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1737 * it to mac80211 since they're handled.)
1738 */
30686bf7 1739 if (ieee80211_hw_check(&sdata->local->hw, AP_LINK_PS))
47086fc5
JB		 1740 return RX_CONTINUE;
1741
1742 /*
1743 * Don't do anything if the station isn't already asleep. In
1744 * the uAPSD case, the station will probably be marked asleep,
1745 * in the PS-Poll case the station must be confused ...
1746 */
c2c98fde 1747 if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA))
47086fc5
JB		 1748 return RX_CONTINUE;
1749
1750 if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) {
46fa38e8 1751 ieee80211_sta_pspoll(&rx->sta->sta);
47086fc5
JB		 1752
1753 /* Free PS Poll skb here instead of returning RX_DROP that would
1754 * count as an dropped frame. */
1755 dev_kfree_skb(rx->skb);
1756
1757 return RX_QUEUED;
1758 } else if (!ieee80211_has_morefrags(hdr->frame_control) &&
1759 !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
1760 ieee80211_has_pm(hdr->frame_control) &&
1761 (ieee80211_is_data_qos(hdr->frame_control) ||
1762 ieee80211_is_qos_nullfunc(hdr->frame_control))) {
a1f2ba04 1763 u8 tid = ieee80211_get_tid(hdr);
47086fc5 1764
46fa38e8 1765 ieee80211_sta_uapsd_trigger(&rx->sta->sta, tid);
47086fc5
JB		 1766 }
1767
1768 return RX_CONTINUE;
1769}
1770
49461622 1771static ieee80211_rx_result debug_noinline
5cf121c3 1772ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
571ecf67
JB		 1773{
1774 struct sta_info *sta = rx->sta;
eb9fb5b8
JB		 1775 struct sk_buff *skb = rx->skb;
1776 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1777 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
ef0621e8 1778 int i;
571ecf67
JB		 1779
1780 if (!sta)
9ae54c84 1781 return RX_CONTINUE;
571ecf67 1782
b291ba11
JB		 1783 /*
1784 * Update last_rx only for IBSS packets which are for the current
e584da5e
AQ		 1785 * BSSID and for station already AUTHORIZED to avoid keeping the
1786 * current IBSS network alive in cases where other STAs start
1787 * using different BSSID. This will also give the station another
1788 * chance to restart the authentication/authorization in case
1789 * something went wrong the first time.
b291ba11 1790 */
05c914fe 1791 if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) {
71364716 1792 u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len,
05c914fe 1793 NL80211_IFTYPE_ADHOC);
e584da5e
AQ		 1794 if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) &&
1795 test_sta_flag(sta, WLAN_STA_AUTHORIZED)) {
e5a9f8d0 1796 sta->rx_stats.last_rx = jiffies;
f4ebddf9 1797 if (ieee80211_is_data(hdr->frame_control) &&
4f6b1b3d
JB		 1798 !is_multicast_ether_addr(hdr->addr1))
1799 sta->rx_stats.last_rate =
1800 sta_stats_encode_rate(status);
3af6334c 1801 }
239281f8 1802 } else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) {
e5a9f8d0 1803 sta->rx_stats.last_rx = jiffies;
b291ba11
JB		 1804 } else if (!is_multicast_ether_addr(hdr->addr1)) {
1805 /*
33b64eb2
LCC		 1806 * Mesh beacons will update last_rx when if they are found to
1807 * match the current local configuration when processed.
571ecf67 1808 */
e5a9f8d0 1809 sta->rx_stats.last_rx = jiffies;
4f6b1b3d
JB		 1810 if (ieee80211_is_data(hdr->frame_control))
1811 sta->rx_stats.last_rate = sta_stats_encode_rate(status);
571ecf67
JB		 1812 }
1813
3cf335d5
KV		 1814 if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
1815 ieee80211_sta_rx_notify(rx->sdata, hdr);
1816
e5a9f8d0 1817 sta->rx_stats.fragments++;
0f9c5a61
JB		 1818
1819 u64_stats_update_begin(&rx->sta->rx_stats.syncp);
e5a9f8d0 1820 sta->rx_stats.bytes += rx->skb->len;
0f9c5a61
JB		 1821 u64_stats_update_end(&rx->sta->rx_stats.syncp);
1822
fe8431f8 1823 if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
e5a9f8d0 1824 sta->rx_stats.last_signal = status->signal;
0be6ed13 1825 ewma_signal_add(&sta->rx_stats_avg.signal, -status->signal);
fe8431f8 1826 }
571ecf67 1827
ef0621e8 1828 if (status->chains) {
e5a9f8d0 1829 sta->rx_stats.chains = status->chains;
ef0621e8
FF		 1830 for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) {
1831 int signal = status->chain_signal[i];
1832
1833 if (!(status->chains & BIT(i)))
1834 continue;
1835
e5a9f8d0 1836 sta->rx_stats.chain_signal_last[i] = signal;
0be6ed13 1837 ewma_signal_add(&sta->rx_stats_avg.chain_signal[i],
e5a9f8d0 1838 -signal);
ef0621e8
FF		 1839 }
1840 }
1841
72eaa43a
JB		 1842 /*
1843 * Change STA power saving mode only at the end of a frame
9fef6544
EG		 1844 * exchange sequence, and only for a data or management
1845 * frame as specified in IEEE 802.11-2016 11.2.3.2
72eaa43a 1846 */
30686bf7 1847 if (!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS) &&
d057e5a3 1848 !ieee80211_has_morefrags(hdr->frame_control) &&
20932750 1849 !is_multicast_ether_addr(hdr->addr1) &&
9fef6544
EG		 1850 (ieee80211_is_mgmt(hdr->frame_control) ||
1851 ieee80211_is_data(hdr->frame_control)) &&
4cfda47b 1852 !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
05c914fe 1853 (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
9fef6544 1854 rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) {
c2c98fde 1855 if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
b4ba544c 1856 if (!ieee80211_has_pm(hdr->frame_control))
d012a605 1857 sta_ps_end(sta);
72eaa43a
JB		 1858 } else {
1859 if (ieee80211_has_pm(hdr->frame_control))
d012a605 1860 sta_ps_start(sta);
72eaa43a 1861 }
571ecf67
JB		 1862 }
1863
3f52b7e3
MP		 1864 /* mesh power save support */
1865 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
1866 ieee80211_mps_rx_h_sta_process(sta, hdr);
1867
22403def
JB		 1868 /*
1869 * Drop (qos-)data::nullfunc frames silently, since they
1870 * are used only to control station power saving mode.
1871 */
30b2f0be 1872 if (ieee80211_is_any_nullfunc(hdr->frame_control)) {
571ecf67 1873 I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
d524215f
FF		 1874
1875 /*
1876 * If we receive a 4-addr nullfunc frame from a STA
e7f4a940
JB		 1877 * that was not moved to a 4-addr STA vlan yet send
1878 * the event to userspace and for older hostapd drop
1879 * the frame to the monitor interface.
d524215f
FF		 1880 */
1881 if (ieee80211_has_a4(hdr->frame_control) &&
1882 (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
1883 (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
e7f4a940
JB		 1884 !rx->sdata->u.vlan.sta))) {
1885 if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT))
1886 cfg80211_rx_unexpected_4addr_frame(
1887 rx->sdata->dev, sta->sta.addr,
1888 GFP_ATOMIC);
d524215f 1889 return RX_DROP_MONITOR;
e7f4a940 1890 }
22403def
JB		 1891 /*
1892 * Update counter and free packet here to avoid
1893 * counting this as a dropped packed.
1894 */
e5a9f8d0 1895 sta->rx_stats.packets++;
571ecf67 1896 dev_kfree_skb(rx->skb);
9ae54c84 1897 return RX_QUEUED;
571ecf67
JB		 1898 }
1899
9ae54c84 1900 return RX_CONTINUE;
571ecf67
JB		 1901} /* ieee80211_rx_h_sta_process */
1902
af2d14b0
JM		 1903static struct ieee80211_key *
1904ieee80211_rx_get_bigtk(struct ieee80211_rx_data *rx, int idx)
1905{
1906 struct ieee80211_key *key = NULL;
1907 struct ieee80211_sub_if_data *sdata = rx->sdata;
1908 int idx2;
1909
1910 /* Make sure key gets set if either BIGTK key index is set so that
1911 * ieee80211_drop_unencrypted_mgmt() can properly drop both unprotected
1912 * Beacon frames and Beacon frames that claim to use another BIGTK key
1913 * index (i.e., a key that we do not have).
1914 */
1915
1916 if (idx < 0) {
1917 idx = NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS;
1918 idx2 = idx + 1;
1919 } else {
1920 if (idx == NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
1921 idx2 = idx + 1;
1922 else
1923 idx2 = idx - 1;
1924 }
1925
1926 if (rx->sta)
1927 key = rcu_dereference(rx->sta->gtk[idx]);
1928 if (!key)
1929 key = rcu_dereference(sdata->keys[idx]);
1930 if (!key && rx->sta)
1931 key = rcu_dereference(rx->sta->gtk[idx2]);
1932 if (!key)
1933 key = rcu_dereference(sdata->keys[idx2]);
1934
1935 return key;
1936}
1937
86c228a7
JA		 1938static ieee80211_rx_result debug_noinline
1939ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
1940{
1941 struct sk_buff *skb = rx->skb;
1942 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1943 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1944 int keyidx;
86c228a7
JA		 1945 ieee80211_rx_result result = RX_DROP_UNUSABLE;
1946 struct ieee80211_key *sta_ptk = NULL;
96fc6efb 1947 struct ieee80211_key *ptk_idx = NULL;
86c228a7
JA		 1948 int mmie_keyidx = -1;
1949 __le16 fc;
2475b1cc 1950 const struct ieee80211_cipher_scheme *cs = NULL;
86c228a7
JA		 1951
1952 /*
1953 * Key selection 101
1954 *
af2d14b0 1955 * There are five types of keys:
86c228a7
JA		 1956 * - GTK (group keys)
1957 * - IGTK (group keys for management frames)
af2d14b0 1958 * - BIGTK (group keys for Beacon frames)
86c228a7
JA		 1959 * - PTK (pairwise keys)
1960 * - STK (station-to-station pairwise keys)
1961 *
1962 * When selecting a key, we have to distinguish between multicast
1963 * (including broadcast) and unicast frames, the latter can only
af2d14b0
JM		 1964 * use PTKs and STKs while the former always use GTKs, IGTKs, and
1965 * BIGTKs. Unless, of course, actual WEP keys ("pre-RSNA") are used,
1966 * then unicast frames can also use key indices like GTKs. Hence, if we
86c228a7
JA		 1967 * don't have a PTK/STK we check the key index for a WEP key.
1968 *
1969 * Note that in a regular BSS, multicast frames are sent by the
1970 * AP only, associated stations unicast the frame to the AP first
1971 * which then multicasts it on their behalf.
1972 *
1973 * There is also a slight problem in IBSS mode: GTKs are negotiated
1974 * with each station, that is something we don't currently handle.
1975 * The spec seems to expect that one negotiates the same key with
1976 * every station but there's no such requirement; VLANs could be
1977 * possible.
1978 */
1979
86c228a7
JA		 1980 /* start without a key */
1981 rx->key = NULL;
2475b1cc 1982 fc = hdr->frame_control;
86c228a7 1983
2475b1cc
MS		 1984 if (rx->sta) {
1985 int keyid = rx->sta->ptk_idx;
96fc6efb 1986 sta_ptk = rcu_dereference(rx->sta->ptk[keyid]);
86c228a7 1987
96fc6efb 1988 if (ieee80211_has_protected(fc)) {
2475b1cc 1989 cs = rx->sta->cipher_scheme;
96fc6efb
AW		 1990 keyid = ieee80211_get_keyid(rx->skb, cs);
1991
2475b1cc
MS		 1992 if (unlikely(keyid < 0))
1993 return RX_DROP_UNUSABLE;
96fc6efb
AW		 1994
1995 ptk_idx = rcu_dereference(rx->sta->ptk[keyid]);
2475b1cc 1996 }
2475b1cc 1997 }
86c228a7
JA		 1998
1999 if (!ieee80211_has_protected(fc))
2000 mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb);
2001
2002 if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) {
96fc6efb 2003 rx->key = ptk_idx ? ptk_idx : sta_ptk;
86c228a7
JA		 2004 if ((status->flag & RX_FLAG_DECRYPTED) &&
2005 (status->flag & RX_FLAG_IV_STRIPPED))
2006 return RX_CONTINUE;
2007 /* Skip decryption if the frame is not protected. */
2008 if (!ieee80211_has_protected(fc))
2009 return RX_CONTINUE;
af2d14b0
JM		 2010 } else if (mmie_keyidx >= 0 && ieee80211_is_beacon(fc)) {
2011 /* Broadcast/multicast robust management frame / BIP */
2012 if ((status->flag & RX_FLAG_DECRYPTED) &&
2013 (status->flag & RX_FLAG_IV_STRIPPED))
2014 return RX_CONTINUE;
2015
2016 if (mmie_keyidx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS ||
2017 mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS +
9eaf183a
JM		 2018 NUM_DEFAULT_BEACON_KEYS) {
2019 cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
2020 skb->data,
2021 skb->len);
af2d14b0 2022 return RX_DROP_MONITOR; /* unexpected BIP keyidx */
9eaf183a 2023 }
af2d14b0
JM		 2024
2025 rx->key = ieee80211_rx_get_bigtk(rx, mmie_keyidx);
2026 if (!rx->key)
2027 return RX_CONTINUE; /* Beacon protection not in use */
86c228a7
JA		 2028 } else if (mmie_keyidx >= 0) {
2029 /* Broadcast/multicast robust management frame / BIP */
2030 if ((status->flag & RX_FLAG_DECRYPTED) &&
2031 (status->flag & RX_FLAG_IV_STRIPPED))
2032 return RX_CONTINUE;
2033
2034 if (mmie_keyidx < NUM_DEFAULT_KEYS ||
2035 mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
2036 return RX_DROP_MONITOR; /* unexpected BIP keyidx */
46f6b060
MH		 2037 if (rx->sta) {
2038 if (ieee80211_is_group_privacy_action(skb) &&
2039 test_sta_flag(rx->sta, WLAN_STA_MFP))
2040 return RX_DROP_MONITOR;
2041
86c228a7 2042 rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]);
46f6b060 2043 }
86c228a7
JA		 2044 if (!rx->key)
2045 rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]);
2046 } else if (!ieee80211_has_protected(fc)) {
2047 /*
2048 * The frame was not protected, so skip decryption. However, we
2049 * need to set rx->key if there is a key that could have been
2050 * used so that the frame may be dropped if encryption would
2051 * have been expected.
2052 */
2053 struct ieee80211_key *key = NULL;
2054 struct ieee80211_sub_if_data *sdata = rx->sdata;
2055 int i;
2056
af2d14b0
JM		 2057 if (ieee80211_is_beacon(fc)) {
2058 key = ieee80211_rx_get_bigtk(rx, -1);
2059 } else if (ieee80211_is_mgmt(fc) &&
2060 is_multicast_ether_addr(hdr->addr1)) {
2061 key = rcu_dereference(rx->sdata->default_mgmt_key);
2062 } else {
86c228a7
JA		 2063 if (rx->sta) {
2064 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
2065 key = rcu_dereference(rx->sta->gtk[i]);
2066 if (key)
2067 break;
2068 }
2069 }
2070 if (!key) {
2071 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
2072 key = rcu_dereference(sdata->keys[i]);
2073 if (key)
2074 break;
2075 }
2076 }
86c228a7 2077 }
af2d14b0
JM		 2078 if (key)
2079 rx->key = key;
86c228a7
JA		 2080 return RX_CONTINUE;
2081 } else {
86c228a7
JA		 2082 /*
2083 * The device doesn't give us the IV so we won't be
2084 * able to look up the key. That's ok though, we
2085 * don't need to decrypt the frame, we just won't
2086 * be able to keep statistics accurate.
2087 * Except for key threshold notifications, should
2088 * we somehow allow the driver to tell us which key
2089 * the hardware used if this flag is set?
2090 */
2091 if ((status->flag & RX_FLAG_DECRYPTED) &&
2092 (status->flag & RX_FLAG_IV_STRIPPED))
2093 return RX_CONTINUE;
2094
96fc6efb 2095 keyidx = ieee80211_get_keyid(rx->skb, cs);
86c228a7 2096
96fc6efb
AW		 2097 if (unlikely(keyidx < 0))
2098 return RX_DROP_UNUSABLE;
86c228a7
JA		 2099
2100 /* check per-station GTK first, if multicast packet */
2101 if (is_multicast_ether_addr(hdr->addr1) && rx->sta)
2102 rx->key = rcu_dereference(rx->sta->gtk[keyidx]);
2103
2104 /* if not found, try default key */
2105 if (!rx->key) {
2106 rx->key = rcu_dereference(rx->sdata->keys[keyidx]);
2107
2108 /*
2109 * RSNA-protected unicast frames should always be
2110 * sent with pairwise or station-to-station keys,
2111 * but for WEP we allow using a key index as well.
2112 */
2113 if (rx->key &&
2114 rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 &&
2115 rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 &&
2116 !is_multicast_ether_addr(hdr->addr1))
2117 rx->key = NULL;
2118 }
2119 }
2120
2121 if (rx->key) {
2122 if (unlikely(rx->key->flags & KEY_FLAG_TAINTED))
2123 return RX_DROP_MONITOR;
2124
86c228a7
JA		 2125 /* TODO: add threshold stuff again */
2126 } else {
2127 return RX_DROP_MONITOR;
2128 }
2129
2130 switch (rx->key->conf.cipher) {
2131 case WLAN_CIPHER_SUITE_WEP40:
2132 case WLAN_CIPHER_SUITE_WEP104:
2133 result = ieee80211_crypto_wep_decrypt(rx);
2134 break;
2135 case WLAN_CIPHER_SUITE_TKIP:
2136 result = ieee80211_crypto_tkip_decrypt(rx);
2137 break;
2138 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db
JM		 2139 result = ieee80211_crypto_ccmp_decrypt(
2140 rx, IEEE80211_CCMP_MIC_LEN);
2141 break;
2142 case WLAN_CIPHER_SUITE_CCMP_256:
2143 result = ieee80211_crypto_ccmp_decrypt(
2144 rx, IEEE80211_CCMP_256_MIC_LEN);
86c228a7
JA		 2145 break;
2146 case WLAN_CIPHER_SUITE_AES_CMAC:
2147 result = ieee80211_crypto_aes_cmac_decrypt(rx);
2148 break;
56c52da2
JM		 2149 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2150 result = ieee80211_crypto_aes_cmac_256_decrypt(rx);
2151 break;
8ade538b
JM		 2152 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2153 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2154 result = ieee80211_crypto_aes_gmac_decrypt(rx);
2155 break;
00b9cfa3
JM		 2156 case WLAN_CIPHER_SUITE_GCMP:
2157 case WLAN_CIPHER_SUITE_GCMP_256:
2158 result = ieee80211_crypto_gcmp_decrypt(rx);
2159 break;
86c228a7 2160 default:
2475b1cc 2161 result = ieee80211_crypto_hw_decrypt(rx);
86c228a7
JA		 2162 }
2163
2164 /* the hdr variable is invalid after the decrypt handlers */
2165
2166 /* either the frame has been decrypted or will be dropped */
2167 status->flag |= RX_FLAG_DECRYPTED;
2168
9eaf183a
JM		 2169 if (unlikely(ieee80211_is_beacon(fc) && result == RX_DROP_UNUSABLE))
2170 cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
2171 skb->data, skb->len);
2172
86c228a7
JA		 2173 return result;
2174}
2175
571ecf67
JB		 2176static inline struct ieee80211_fragment_entry *
2177ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
2178 unsigned int frag, unsigned int seq, int rx_queue,
2179 struct sk_buff **skb)
2180{
2181 struct ieee80211_fragment_entry *entry;
571ecf67 2182
571ecf67
JB		 2183 entry = &sdata->fragments[sdata->fragment_next++];
2184 if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
2185 sdata->fragment_next = 0;
2186
bdcbd8e0 2187 if (!skb_queue_empty(&entry->skb_list))
571ecf67 2188 __skb_queue_purge(&entry->skb_list);
571ecf67
JB		 2189
2190 __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
2191 *skb = NULL;
2192 entry->first_frag_time = jiffies;
2193 entry->seq = seq;
2194 entry->rx_queue = rx_queue;
2195 entry->last_frag = frag;
9acc54be 2196 entry->check_sequential_pn = false;
571ecf67
JB		 2197 entry->extra_len = 0;
2198
2199 return entry;
2200}
2201
2202static inline struct ieee80211_fragment_entry *
2203ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
b73d70ad 2204 unsigned int frag, unsigned int seq,
571ecf67
JB		 2205 int rx_queue, struct ieee80211_hdr *hdr)
2206{
2207 struct ieee80211_fragment_entry *entry;
2208 int i, idx;
2209
2210 idx = sdata->fragment_next;
2211 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
2212 struct ieee80211_hdr *f_hdr;
7957a9de 2213 struct sk_buff *f_skb;
571ecf67
JB		 2214
2215 idx--;
2216 if (idx < 0)
2217 idx = IEEE80211_FRAGMENT_MAX - 1;
2218
2219 entry = &sdata->fragments[idx];
2220 if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
2221 entry->rx_queue != rx_queue ||
2222 entry->last_frag + 1 != frag)
2223 continue;
2224
7957a9de
DM		 2225 f_skb = __skb_peek(&entry->skb_list);
2226 f_hdr = (struct ieee80211_hdr *) f_skb->data;
571ecf67 2227
b73d70ad
HH		 2228 /*
2229 * Check ftype and addresses are equal, else check next fragment
2230 */
2231 if (((hdr->frame_control ^ f_hdr->frame_control) &
2232 cpu_to_le16(IEEE80211_FCTL_FTYPE)) ||
b203ca39
JP		 2233 !ether_addr_equal(hdr->addr1, f_hdr->addr1) ||
2234 !ether_addr_equal(hdr->addr2, f_hdr->addr2))
571ecf67
JB		 2235 continue;
2236
ab46623e 2237 if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
571ecf67
JB		 2238 __skb_queue_purge(&entry->skb_list);
2239 continue;
2240 }
2241 return entry;
2242 }
2243
2244 return NULL;
2245}
2246
49461622 2247static ieee80211_rx_result debug_noinline
5cf121c3 2248ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
571ecf67
JB		 2249{
2250 struct ieee80211_hdr *hdr;
2251 u16 sc;
358c8d9d 2252 __le16 fc;
571ecf67
JB		 2253 unsigned int frag, seq;
2254 struct ieee80211_fragment_entry *entry;
2255 struct sk_buff *skb;
2256
b73d70ad 2257 hdr = (struct ieee80211_hdr *)rx->skb->data;
358c8d9d 2258 fc = hdr->frame_control;
f7fbf70e
JC		 2259
2260 if (ieee80211_is_ctl(fc))
2261 return RX_CONTINUE;
2262
571ecf67
JB		 2263 sc = le16_to_cpu(hdr->seq_ctrl);
2264 frag = sc & IEEE80211_SCTL_FRAG;
2265
b8fff407 2266 if (is_multicast_ether_addr(hdr->addr1)) {
c206ca67 2267 I802_DEBUG_INC(rx->local->dot11MulticastReceivedFrameCount);
d025933e 2268 goto out_no_led;
571ecf67 2269 }
b8fff407 2270
d025933e
AM		 2271 if (likely(!ieee80211_has_morefrags(fc) && frag == 0))
2272 goto out;
2273
571ecf67
JB		 2274 I802_DEBUG_INC(rx->local->rx_handlers_fragments);
2275
e3cf8b3f
ZY		 2276 if (skb_linearize(rx->skb))
2277 return RX_DROP_UNUSABLE;
2278
058897a4
AK		 2279 /*
2280 * skb_linearize() might change the skb->data and
2281 * previously cached variables (in this case, hdr) need to
2282 * be refreshed with the new data.
2283 */
2284 hdr = (struct ieee80211_hdr *)rx->skb->data;
571ecf67
JB		 2285 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2286
2287 if (frag == 0) {
2288 /* This is the first fragment of a new frame. */
2289 entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
9e26297a 2290 rx->seqno_idx, &(rx->skb));
2b2ba0db
JM		 2291 if (rx->key &&
2292 (rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP ||
9acc54be
JB		 2293 rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP_256 ||
2294 rx->key->conf.cipher == WLAN_CIPHER_SUITE_GCMP ||
2295 rx->key->conf.cipher == WLAN_CIPHER_SUITE_GCMP_256) &&
358c8d9d 2296 ieee80211_has_protected(fc)) {
9e26297a 2297 int queue = rx->security_idx;
9acc54be
JB		 2298
2299 /* Store CCMP/GCMP PN so that we can verify that the
2300 * next fragment has a sequential PN value.
2301 */
2302 entry->check_sequential_pn = true;
571ecf67 2303 memcpy(entry->last_pn,
9190252c 2304 rx->key->u.ccmp.rx_pn[queue],
4325f6ca 2305 IEEE80211_CCMP_PN_LEN);
9acc54be
JB		 2306 BUILD_BUG_ON(offsetof(struct ieee80211_key,
2307 u.ccmp.rx_pn) !=
2308 offsetof(struct ieee80211_key,
2309 u.gcmp.rx_pn));
2310 BUILD_BUG_ON(sizeof(rx->key->u.ccmp.rx_pn[queue]) !=
2311 sizeof(rx->key->u.gcmp.rx_pn[queue]));
2312 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN !=
2313 IEEE80211_GCMP_PN_LEN);
571ecf67 2314 }
9ae54c84 2315 return RX_QUEUED;
571ecf67
JB		 2316 }
2317
2318 /* This is a fragment for a frame that should already be pending in
2319 * fragment cache. Add this fragment to the end of the pending entry.
2320 */
9e26297a
JB		 2321 entry = ieee80211_reassemble_find(rx->sdata, frag, seq,
2322 rx->seqno_idx, hdr);
571ecf67
JB		 2323 if (!entry) {
2324 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
e4c26add 2325 return RX_DROP_MONITOR;
571ecf67
JB		 2326 }
2327
9acc54be
JB		 2328 /* "The receiver shall discard MSDUs and MMPDUs whose constituent
2329 * MPDU PN values are not incrementing in steps of 1."
2330 * see IEEE P802.11-REVmc/D5.0, 12.5.3.4.4, item d (for CCMP)
2331 * and IEEE P802.11-REVmc/D5.0, 12.5.5.4.4, item d (for GCMP)
2332 */
2333 if (entry->check_sequential_pn) {
571ecf67 2334 int i;
4325f6ca 2335 u8 pn[IEEE80211_CCMP_PN_LEN], *rpn;
9190252c 2336 int queue;
9acc54be 2337
2b2ba0db
JM		 2338 if (!rx->key ||
2339 (rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP &&
9acc54be
JB		 2340 rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP_256 &&
2341 rx->key->conf.cipher != WLAN_CIPHER_SUITE_GCMP &&
2342 rx->key->conf.cipher != WLAN_CIPHER_SUITE_GCMP_256))
e4c26add 2343 return RX_DROP_UNUSABLE;
4325f6ca
JB		 2344 memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN);
2345 for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) {
571ecf67
JB		 2346 pn[i]++;
2347 if (pn[i])
2348 break;
2349 }
9e26297a 2350 queue = rx->security_idx;
9190252c 2351 rpn = rx->key->u.ccmp.rx_pn[queue];
4325f6ca 2352 if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN))
e4c26add 2353 return RX_DROP_UNUSABLE;
4325f6ca 2354 memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN);
571ecf67
JB		 2355 }
2356
358c8d9d 2357 skb_pull(rx->skb, ieee80211_hdrlen(fc));
571ecf67
JB		 2358 __skb_queue_tail(&entry->skb_list, rx->skb);
2359 entry->last_frag = frag;
2360 entry->extra_len += rx->skb->len;
358c8d9d 2361 if (ieee80211_has_morefrags(fc)) {
571ecf67 2362 rx->skb = NULL;
9ae54c84 2363 return RX_QUEUED;
571ecf67
JB		 2364 }
2365
2366 rx->skb = __skb_dequeue(&entry->skb_list);
2367 if (skb_tailroom(rx->skb) < entry->extra_len) {
f1160434 2368 I802_DEBUG_INC(rx->local->rx_expand_skb_head_defrag);
571ecf67
JB		 2369 if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
2370 GFP_ATOMIC))) {
2371 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
2372 __skb_queue_purge(&entry->skb_list);
e4c26add 2373 return RX_DROP_UNUSABLE;
571ecf67
JB		 2374 }
2375 }
2376 while ((skb = __skb_dequeue(&entry->skb_list))) {
59ae1d12 2377 skb_put_data(rx->skb, skb->data, skb->len);
571ecf67
JB		 2378 dev_kfree_skb(skb);
2379 }
2380
571ecf67 2381 out:
d025933e
AM		 2382 ieee80211_led_rx(rx->local);
2383 out_no_led:
571ecf67 2384 if (rx->sta)
e5a9f8d0 2385 rx->sta->rx_stats.packets++;
9ae54c84 2386 return RX_CONTINUE;
571ecf67
JB		 2387}
2388
1df332e8 2389static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
571ecf67 2390{
1df332e8 2391 if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED)))
76ee65bf 2392 return -EACCES;
571ecf67 2393
76ee65bf 2394 return 0;
571ecf67
JB		 2395}
2396
1df332e8 2397static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
571ecf67 2398{
eb9fb5b8
JB		 2399 struct sk_buff *skb = rx->skb;
2400 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
2401
3017b80b 2402 /*
7848ba7d
JB		 2403 * Pass through unencrypted frames if the hardware has
2404 * decrypted them already.
3017b80b 2405 */
eb9fb5b8 2406 if (status->flag & RX_FLAG_DECRYPTED)
76ee65bf 2407 return 0;
571ecf67
JB		 2408
2409 /* Drop unencrypted frames if key is set. */
358c8d9d 2410 if (unlikely(!ieee80211_has_protected(fc) &&
30b2f0be 2411 !ieee80211_is_any_nullfunc(fc) &&
e8f4fb7c 2412 ieee80211_is_data(fc) && rx->key))
76ee65bf 2413 return -EACCES;
bef5d1c7
JB		 2414
2415 return 0;
2416}
2417
1df332e8 2418static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
bef5d1c7
JB		 2419{
2420 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
e3efca0a 2421 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
bef5d1c7 2422 __le16 fc = hdr->frame_control;
bef5d1c7 2423
e3efca0a
JM		 2424 /*
2425 * Pass through unencrypted frames if the hardware has
2426 * decrypted them already.
2427 */
2428 if (status->flag & RX_FLAG_DECRYPTED)
2429 return 0;
bef5d1c7 2430
c2c98fde 2431 if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) {
d211e90e
JM		 2432 if (unlikely(!ieee80211_has_protected(fc) &&
2433 ieee80211_is_unicast_robust_mgmt_frame(rx->skb) &&
cf4e594e 2434 rx->key)) {
6ff57cf8
JB		 2435 if (ieee80211_is_deauth(fc) ||
2436 ieee80211_is_disassoc(fc))
2437 cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
2438 rx->skb->data,
2439 rx->skb->len);
f2ca3ea4 2440 return -EACCES;
cf4e594e 2441 }
f2ca3ea4 2442 /* BIP does not use Protected field, so need to check MMIE */
f64f9e71 2443 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) &&
cf4e594e 2444 ieee80211_get_mmie_keyidx(rx->skb) < 0)) {
6ff57cf8
JB		 2445 if (ieee80211_is_deauth(fc) ||
2446 ieee80211_is_disassoc(fc))
2447 cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
2448 rx->skb->data,
2449 rx->skb->len);
f2ca3ea4 2450 return -EACCES;
cf4e594e 2451 }
af2d14b0 2452 if (unlikely(ieee80211_is_beacon(fc) && rx->key &&
9eaf183a
JM		 2453 ieee80211_get_mmie_keyidx(rx->skb) < 0)) {
2454 cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
2455 rx->skb->data,
2456 rx->skb->len);
af2d14b0 2457 return -EACCES;
9eaf183a 2458 }
f2ca3ea4
JM		 2459 /*
2460 * When using MFP, Action frames are not allowed prior to
2461 * having configured keys.
2462 */
2463 if (unlikely(ieee80211_is_action(fc) && !rx->key &&
d8ca16db 2464 ieee80211_is_robust_mgmt_frame(rx->skb)))
f2ca3ea4
JM		 2465 return -EACCES;
2466 }
b3fc9c6c 2467
76ee65bf 2468 return 0;
571ecf67
JB		 2469}
2470
76ee65bf 2471static int
4114fa21 2472__ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)
571ecf67 2473{
eb9fb5b8 2474 struct ieee80211_sub_if_data *sdata = rx->sdata;
f14543ee 2475 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
fbb327c5
FF		 2476 bool check_port_control = false;
2477 struct ethhdr *ehdr;
2478 int ret;
f14543ee 2479
4114fa21 2480 *port_control = false;
9bc383de
JB		 2481 if (ieee80211_has_a4(hdr->frame_control) &&
2482 sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
f14543ee 2483 return -1;
9bc383de 2484
fbb327c5
FF		 2485 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2486 !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) {
2487
2488 if (!sdata->u.mgd.use_4addr)
2489 return -1;
1ecef20c 2490 else if (!ether_addr_equal(hdr->addr1, sdata->vif.addr))
fbb327c5
FF		 2491 check_port_control = true;
2492 }
2493
9bc383de 2494 if (is_multicast_ether_addr(hdr->addr1) &&
fbb327c5 2495 sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta)
f14543ee 2496 return -1;
571ecf67 2497
fbb327c5 2498 ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
4114fa21 2499 if (ret < 0)
fbb327c5
FF		 2500 return ret;
2501
2502 ehdr = (struct ethhdr *) rx->skb->data;
4114fa21
FF		 2503 if (ehdr->h_proto == rx->sdata->control_port_protocol)
2504 *port_control = true;
2505 else if (check_port_control)
fbb327c5
FF		 2506 return -1;
2507
2508 return 0;
76ee65bf 2509}
571ecf67 2510
ce3edf6d
JB		 2511/*
2512 * requires that rx->skb is a frame with ethernet header
2513 */
358c8d9d 2514static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
ce3edf6d 2515{
c97c23e3 2516 static const u8 pae_group_addr[ETH_ALEN] __aligned(2)
ce3edf6d
JB		 2517 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
2518 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
2519
2520 /*
2521 * Allow EAPOL frames to us/the PAE group address regardless
2522 * of whether the frame was encrypted or not.
2523 */
a621fa4d 2524 if (ehdr->h_proto == rx->sdata->control_port_protocol &&
3bc7945e
JP		 2525 (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) ||
2526 ether_addr_equal(ehdr->h_dest, pae_group_addr)))
ce3edf6d
JB		 2527 return true;
2528
2529 if (ieee80211_802_1x_port_control(rx) ||
358c8d9d 2530 ieee80211_drop_unencrypted(rx, fc))
ce3edf6d
JB		 2531 return false;
2532
2533 return true;
2534}
2535
018f6fbf
DK		 2536static void ieee80211_deliver_skb_to_local_stack(struct sk_buff *skb,
2537 struct ieee80211_rx_data *rx)
2538{
2539 struct ieee80211_sub_if_data *sdata = rx->sdata;
2540 struct net_device *dev = sdata->dev;
2541
2542 if (unlikely((skb->protocol == sdata->control_port_protocol ||
7f3f96ce
MT		 2543 (skb->protocol == cpu_to_be16(ETH_P_PREAUTH) &&
2544 !sdata->control_port_no_preauth)) &&
018f6fbf
DK		 2545 sdata->control_port_over_nl80211)) {
2546 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
f8b43c5c 2547 bool noencrypt = !(status->flag & RX_FLAG_DECRYPTED);
018f6fbf 2548
a948f713 2549 cfg80211_rx_control_port(dev, skb, noencrypt);
018f6fbf
DK		 2550 dev_kfree_skb(skb);
2551 } else {
c8a41c6a
DK		 2552 memset(skb->cb, 0, sizeof(skb->cb));
2553
018f6fbf
DK		 2554 /* deliver to local stack */
2555 if (rx->napi)
2556 napi_gro_receive(rx->napi, skb);
2557 else
2558 netif_receive_skb(skb);
2559 }
2560}
2561
ce3edf6d
JB		 2562/*
2563 * requires that rx->skb is a frame with ethernet header
2564 */
76ee65bf 2565static void
5cf121c3 2566ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
76ee65bf 2567{
eb9fb5b8
JB		 2568 struct ieee80211_sub_if_data *sdata = rx->sdata;
2569 struct net_device *dev = sdata->dev;
76ee65bf 2570 struct sk_buff *skb, *xmit_skb;
ce3edf6d
JB		 2571 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
2572 struct sta_info *dsta;
571ecf67 2573
76ee65bf
RR		 2574 skb = rx->skb;
2575 xmit_skb = NULL;
571ecf67 2576
5a490510
JB		 2577 ieee80211_rx_stats(dev, skb->len);
2578
de8f18d3
JB		 2579 if (rx->sta) {
2580 /* The seqno index has the same property as needed
2581 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
2582 * for non-QoS-data frames. Here we know it's a data
2583 * frame, so count MSDUs.
2584 */
0f9c5a61 2585 u64_stats_update_begin(&rx->sta->rx_stats.syncp);
de8f18d3 2586 rx->sta->rx_stats.msdu[rx->seqno_idx]++;
0f9c5a61 2587 u64_stats_update_end(&rx->sta->rx_stats.syncp);
de8f18d3
JB		 2588 }
2589
05c914fe
JB		 2590 if ((sdata->vif.type == NL80211_IFTYPE_AP ||
2591 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
213cd118 2592 !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
9bc383de 2593 (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) {
72f15d53
MB		 2594 if (is_multicast_ether_addr(ehdr->h_dest) &&
2595 ieee80211_vif_get_num_mcast_if(sdata) != 0) {
ce3edf6d
JB		 2596 /*
2597 * send multicast frames both to higher layers in
2598 * local net stack and back to the wireless medium
2599 */
76ee65bf 2600 xmit_skb = skb_copy(skb, GFP_ATOMIC);
e87cc472 2601 if (!xmit_skb)
bdcbd8e0 2602 net_info_ratelimited("%s: failed to clone multicast frame\n",
e87cc472 2603 dev->name);
42dca5ef
JB		 2604 } else if (!is_multicast_ether_addr(ehdr->h_dest) &&
2605 !ether_addr_equal(ehdr->h_dest, ehdr->h_source)) {
2606 dsta = sta_info_get(sdata, ehdr->h_dest);
abe60632 2607 if (dsta) {
ce3edf6d
JB		 2608 /*
2609 * The destination station is associated to
2610 * this AP (in this VLAN), so send the frame
2611 * directly to it and do not pass it to local
2612 * net stack.
571ecf67 2613 */
76ee65bf 2614 xmit_skb = skb;
571ecf67
JB		 2615 skb = NULL;
2616 }
571ecf67
JB		 2617 }
2618 }
2619
59d9cb07 2620#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
9e890a1f
JB		 2621 if (skb) {
2622 /* 'align' will only take the values 0 or 2 here since all
2623 * frames are required to be aligned to 2-byte boundaries
2624 * when being passed to mac80211; the code here works just
2625 * as well if that isn't true, but mac80211 assumes it can
2626 * access fields as 2-byte aligned (e.g. for ether_addr_equal)
d1c3a37c 2627 */
9e890a1f
JB		 2628 int align;
2629
2630 align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3;
d1c3a37c
JB		 2631 if (align) {
2632 if (WARN_ON(skb_headroom(skb) < 3)) {
2633 dev_kfree_skb(skb);
2634 skb = NULL;
2635 } else {
2636 u8 *data = skb->data;
8ce0b589
ZY		 2637 size_t len = skb_headlen(skb);
2638 skb->data -= align;
2639 memmove(skb->data, data, len);
2640 skb_set_tail_pointer(skb, len);
d1c3a37c
JB		 2641 }
2642 }
9e890a1f 2643 }
d1c3a37c
JB		 2644#endif
2645
9e890a1f 2646 if (skb) {
9e890a1f 2647 skb->protocol = eth_type_trans(skb, dev);
018f6fbf 2648 ieee80211_deliver_skb_to_local_stack(skb, rx);
571ecf67
JB		 2649 }
2650
76ee65bf 2651 if (xmit_skb) {
aef6c928
HS		 2652 /*
2653 * Send to wireless media and increase priority by 256 to
2654 * keep the received priority instead of reclassifying
2655 * the frame (see cfg80211_classify8021d).
2656 */
2657 xmit_skb->priority += 256;
f831e909 2658 xmit_skb->protocol = htons(ETH_P_802_3);
ce3edf6d
JB		 2659 skb_reset_network_header(xmit_skb);
2660 skb_reset_mac_header(xmit_skb);
76ee65bf 2661 dev_queue_xmit(xmit_skb);
571ecf67 2662 }
76ee65bf
RR		 2663}
2664
49461622 2665static ieee80211_rx_result debug_noinline
24bba078 2666__ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx, u8 data_offset)
fd4c7f2f 2667{
eb9fb5b8 2668 struct net_device *dev = rx->sdata->dev;
eaf85ca7 2669 struct sk_buff *skb = rx->skb;
358c8d9d
HH		 2670 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2671 __le16 fc = hdr->frame_control;
eaf85ca7 2672 struct sk_buff_head frame_list;
7f6990c8 2673 struct ethhdr ethhdr;
e2b5227f 2674 const u8 *check_da = ethhdr.h_dest, *check_sa = ethhdr.h_source;
fd4c7f2f 2675
ea720935 2676 if (unlikely(ieee80211_has_a4(hdr->frame_control))) {
e2b5227f
JB		 2677 check_da = NULL;
2678 check_sa = NULL;
2679 } else switch (rx->sdata->vif.type) {
2680 case NL80211_IFTYPE_AP:
2681 case NL80211_IFTYPE_AP_VLAN:
2682 check_da = NULL;
2683 break;
2684 case NL80211_IFTYPE_STATION:
2685 if (!rx->sta ||
2686 !test_sta_flag(rx->sta, WLAN_STA_TDLS_PEER))
2687 check_sa = NULL;
2688 break;
2689 case NL80211_IFTYPE_MESH_POINT:
2690 check_sa = NULL;
2691 break;
2692 default:
2693 break;
ea720935 2694 }
fd4c7f2f 2695
eaf85ca7
ZY		 2696 skb->dev = dev;
2697 __skb_queue_head_init(&frame_list);
fd4c7f2f 2698
7f6990c8
JB		 2699 if (ieee80211_data_to_8023_exthdr(skb, &ethhdr,
2700 rx->sdata->vif.addr,
24bba078
FF		 2701 rx->sdata->vif.type,
2702 data_offset))
7f6990c8
JB		 2703 return RX_DROP_UNUSABLE;
2704
eaf85ca7
ZY		 2705 ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr,
2706 rx->sdata->vif.type,
8b935ee2 2707 rx->local->hw.extra_tx_headroom,
e2b5227f 2708 check_da, check_sa);
fd4c7f2f 2709
eaf85ca7
ZY		 2710 while (!skb_queue_empty(&frame_list)) {
2711 rx->skb = __skb_dequeue(&frame_list);
fd4c7f2f 2712
358c8d9d 2713 if (!ieee80211_frame_allowed(rx, fc)) {
eaf85ca7 2714 dev_kfree_skb(rx->skb);
ce3edf6d
JB		 2715 continue;
2716 }
fd4c7f2f
RR		 2717
2718 ieee80211_deliver_skb(rx);
2719 }
2720
9ae54c84 2721 return RX_QUEUED;
fd4c7f2f
RR		 2722}
2723
24bba078
FF		 2724static ieee80211_rx_result debug_noinline
2725ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
2726{
2727 struct sk_buff *skb = rx->skb;
2728 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
2729 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2730 __le16 fc = hdr->frame_control;
2731
2732 if (!(status->rx_flags & IEEE80211_RX_AMSDU))
2733 return RX_CONTINUE;
2734
2735 if (unlikely(!ieee80211_is_data(fc)))
2736 return RX_CONTINUE;
2737
2738 if (unlikely(!ieee80211_is_data_present(fc)))
2739 return RX_DROP_MONITOR;
2740
2741 if (unlikely(ieee80211_has_a4(hdr->frame_control))) {
2742 switch (rx->sdata->vif.type) {
2743 case NL80211_IFTYPE_AP_VLAN:
2744 if (!rx->sdata->u.vlan.sta)
2745 return RX_DROP_UNUSABLE;
2746 break;
2747 case NL80211_IFTYPE_STATION:
2748 if (!rx->sdata->u.mgd.use_4addr)
2749 return RX_DROP_UNUSABLE;
2750 break;
2751 default:
2752 return RX_DROP_UNUSABLE;
2753 }
2754 }
2755
2756 if (is_multicast_ether_addr(hdr->addr1))
2757 return RX_DROP_UNUSABLE;
2758
2759 return __ieee80211_rx_h_amsdu(rx, 0);
2760}
2761
bf94e17b 2762#ifdef CONFIG_MAC80211_MESH
b0dee578 2763static ieee80211_rx_result
e32f85f7
LCC		 2764ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
2765{
30789eb6
TP		 2766 struct ieee80211_hdr *fwd_hdr, *hdr;
2767 struct ieee80211_tx_info *info;
e32f85f7 2768 struct ieee80211s_hdr *mesh_hdr;
e32f85f7 2769 struct sk_buff *skb = rx->skb, *fwd_skb;
3b8d81e0 2770 struct ieee80211_local *local = rx->local;
eb9fb5b8 2771 struct ieee80211_sub_if_data *sdata = rx->sdata;
30789eb6 2772 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
cf440128 2773 u16 ac, q, hdrlen;
51d0af22 2774 int tailroom = 0;
e32f85f7
LCC		 2775
2776 hdr = (struct ieee80211_hdr *) skb->data;
2777 hdrlen = ieee80211_hdrlen(hdr->frame_control);
9b395bc3
JB		 2778
2779 /* make sure fixed part of mesh header is there, also checks skb len */
2780 if (!pskb_may_pull(rx->skb, hdrlen + 6))
2781 return RX_DROP_MONITOR;
2782
2783 mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
2784
2785 /* make sure full mesh header is there, also checks skb len */
2786 if (!pskb_may_pull(rx->skb,
2787 hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr)))
2788 return RX_DROP_MONITOR;
2789
2790 /* reload pointers */
2791 hdr = (struct ieee80211_hdr *) skb->data;
e32f85f7
LCC		 2792 mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
2793
d0c22119
BC		 2794 if (ieee80211_drop_unencrypted(rx, hdr->frame_control))
2795 return RX_DROP_MONITOR;
2796
2157fdd6
TP		 2797 /* frame is in RMC, don't forward */
2798 if (ieee80211_is_data(hdr->frame_control) &&
2799 is_multicast_ether_addr(hdr->addr1) &&
bf7cd94d 2800 mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr))
2157fdd6
TP		 2801 return RX_DROP_MONITOR;
2802
5c90067c 2803 if (!ieee80211_is_data(hdr->frame_control))
e32f85f7
LCC		 2804 return RX_CONTINUE;
2805
2806 if (!mesh_hdr->ttl)
e32f85f7
LCC		 2807 return RX_DROP_MONITOR;
2808
43b7b314 2809 if (mesh_hdr->flags & MESH_FLAGS_AE) {
79617dee 2810 struct mesh_path *mppath;
43b7b314
JC		 2811 char *proxied_addr;
2812 char *mpp_addr;
2813
2814 if (is_multicast_ether_addr(hdr->addr1)) {
2815 mpp_addr = hdr->addr3;
2816 proxied_addr = mesh_hdr->eaddr1;
5667c86a
RM		 2817 } else if ((mesh_hdr->flags & MESH_FLAGS_AE) ==
2818 MESH_FLAGS_AE_A5_A6) {
9b395bc3 2819 /* has_a4 already checked in ieee80211_rx_mesh_check */
43b7b314
JC		 2820 mpp_addr = hdr->addr4;
2821 proxied_addr = mesh_hdr->eaddr2;
9b395bc3
JB		 2822 } else {
2823 return RX_DROP_MONITOR;
43b7b314 2824 }
79617dee 2825
79617dee 2826 rcu_read_lock();
bf7cd94d 2827 mppath = mpp_path_lookup(sdata, proxied_addr);
79617dee 2828 if (!mppath) {
bf7cd94d 2829 mpp_path_add(sdata, proxied_addr, mpp_addr);
79617dee
Y		 2830 } else {
2831 spin_lock_bh(&mppath->state_lock);
b203ca39 2832 if (!ether_addr_equal(mppath->mpp, mpp_addr))
43b7b314 2833 memcpy(mppath->mpp, mpp_addr, ETH_ALEN);
ab1c7906 2834 mppath->exp_time = jiffies;
79617dee
Y		 2835 spin_unlock_bh(&mppath->state_lock);
2836 }
2837 rcu_read_unlock();
2838 }
2839
3c5772a5
JC		 2840 /* Frame has reached destination. Don't forward */
2841 if (!is_multicast_ether_addr(hdr->addr1) &&
b203ca39 2842 ether_addr_equal(sdata->vif.addr, hdr->addr3))
e32f85f7
LCC		 2843 return RX_CONTINUE;
2844
cf440128
MK		 2845 ac = ieee80211_select_queue_80211(sdata, skb, hdr);
2846 q = sdata->vif.hw_queue[ac];
d3c1597b 2847 if (ieee80211_queue_stopped(&local->hw, q)) {
30789eb6 2848 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion);
d3c1597b
TP		 2849 return RX_DROP_MONITOR;
2850 }
2851 skb_set_queue_mapping(skb, q);
e32f85f7 2852
30789eb6 2853 if (!--mesh_hdr->ttl) {
a0dc0203
BC		 2854 if (!is_multicast_ether_addr(hdr->addr1))
2855 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh,
2856 dropped_frames_ttl);
2ac64cd1 2857 goto out;
30789eb6
TP		 2858 }
2859
d665508b
CYY		 2860 if (!ifmsh->mshcfg.dot11MeshForwarding)
2861 goto out;
2862
51d0af22
FF		 2863 if (sdata->crypto_tx_tailroom_needed_cnt)
2864 tailroom = IEEE80211_ENCRYPT_TAILROOM;
2865
c38c39bf 2866 fwd_skb = skb_copy_expand(skb, local->tx_headroom +
51d0af22
FF		 2867 sdata->encrypt_headroom,
2868 tailroom, GFP_ATOMIC);
0c3d5a96 2869 if (!fwd_skb)
30789eb6 2870 goto out;
30789eb6
TP		 2871
2872 fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
9d6d6f49 2873 fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY);
30789eb6
TP		 2874 info = IEEE80211_SKB_CB(fwd_skb);
2875 memset(info, 0, sizeof(*info));
2876 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
2877 info->control.vif = &rx->sdata->vif;
2878 info->control.jiffies = jiffies;
2879 if (is_multicast_ether_addr(fwd_hdr->addr1)) {
2880 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast);
2881 memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
3f52b7e3
MP		 2882 /* update power mode indication when forwarding */
2883 ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr);
bf7cd94d 2884 } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) {
3f52b7e3 2885 /* mesh power mode flags updated in mesh_nexthop_lookup */
30789eb6
TP		 2886 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
2887 } else {
2888 /* unable to resolve next hop */
bf7cd94d 2889 mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl,
f63f8421
CYY		 2890 fwd_hdr->addr3, 0,
2891 WLAN_REASON_MESH_PATH_NOFORWARD,
2892 fwd_hdr->addr2);
30789eb6 2893 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route);
74b8cc3d 2894 kfree_skb(fwd_skb);
30789eb6 2895 return RX_DROP_MONITOR;
e32f85f7
LCC		 2896 }
2897
30789eb6
TP		 2898 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
2899 ieee80211_add_pending_skb(local, fwd_skb);
b51aff05 2900 out:
df140465 2901 if (is_multicast_ether_addr(hdr->addr1))
e32f85f7 2902 return RX_CONTINUE;
df140465 2903 return RX_DROP_MONITOR;
e32f85f7 2904}
bf94e17b 2905#endif
e32f85f7 2906
49461622 2907static ieee80211_rx_result debug_noinline
5cf121c3 2908ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
76ee65bf 2909{
eb9fb5b8 2910 struct ieee80211_sub_if_data *sdata = rx->sdata;
e15276a4 2911 struct ieee80211_local *local = rx->local;
eb9fb5b8 2912 struct net_device *dev = sdata->dev;
358c8d9d
HH		 2913 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
2914 __le16 fc = hdr->frame_control;
4114fa21 2915 bool port_control;
ce3edf6d 2916 int err;
76ee65bf 2917
358c8d9d 2918 if (unlikely(!ieee80211_is_data(hdr->frame_control)))
9ae54c84 2919 return RX_CONTINUE;
76ee65bf 2920
358c8d9d 2921 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
e4c26add 2922 return RX_DROP_MONITOR;
76ee65bf 2923
f14543ee 2924 /*
e7f4a940
JB		 2925 * Send unexpected-4addr-frame event to hostapd. For older versions,
2926 * also drop the frame to cooked monitor interfaces.
f14543ee
FF		 2927 */
2928 if (ieee80211_has_a4(hdr->frame_control) &&
e7f4a940
JB		 2929 sdata->vif.type == NL80211_IFTYPE_AP) {
2930 if (rx->sta &&
2931 !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT))
2932 cfg80211_rx_unexpected_4addr_frame(
2933 rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC);
f14543ee 2934 return RX_DROP_MONITOR;
e7f4a940 2935 }
f14543ee 2936
4114fa21 2937 err = __ieee80211_data_to_8023(rx, &port_control);
76ee65bf 2938 if (unlikely(err))
e4c26add 2939 return RX_DROP_UNUSABLE;
76ee65bf 2940
358c8d9d 2941 if (!ieee80211_frame_allowed(rx, fc))
e4c26add 2942 return RX_DROP_MONITOR;
ce3edf6d 2943
8a4d32f3
AN		 2944 /* directly handle TDLS channel switch requests/responses */
2945 if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
2946 cpu_to_be16(ETH_P_TDLS))) {
2947 struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
2948
2949 if (pskb_may_pull(rx->skb,
2950 offsetof(struct ieee80211_tdls_data, u)) &&
2951 tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
2952 tf->category == WLAN_CATEGORY_TDLS &&
2953 (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
2954 tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
c8ff71e6
AN		 2955 skb_queue_tail(&local->skb_queue_tdls_chsw, rx->skb);
2956 schedule_work(&local->tdls_chsw_work);
8a4d32f3 2957 if (rx->sta)
e5a9f8d0 2958 rx->sta->rx_stats.packets++;
8a4d32f3
AN		 2959
2960 return RX_QUEUED;
2961 }
2962 }
2963
4114fa21
FF		 2964 if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
2965 unlikely(port_control) && sdata->bss) {
2966 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2967 u.ap);
2968 dev = sdata->dev;
2969 rx->sdata = sdata;
2970 }
2971
76ee65bf
RR		 2972 rx->skb->dev = dev;
2973
602fae42
JB		 2974 if (!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2975 local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 &&
8c99f691
RM		 2976 !is_multicast_ether_addr(
2977 ((struct ethhdr *)rx->skb->data)->h_dest) &&
2978 (!local->scanning &&
602fae42
JB		 2979 !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)))
2980 mod_timer(&local->dynamic_ps_timer, jiffies +
2981 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
e15276a4 2982
76ee65bf 2983 ieee80211_deliver_skb(rx);
571ecf67 2984
9ae54c84 2985 return RX_QUEUED;
571ecf67
JB		 2986}
2987
49461622 2988static ieee80211_rx_result debug_noinline
f9e124fb 2989ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames)
71364716 2990{
71364716 2991 struct sk_buff *skb = rx->skb;
a7767f95 2992 struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data;
71364716
RR		 2993 struct tid_ampdu_rx *tid_agg_rx;
2994 u16 start_seq_num;
2995 u16 tid;
2996
a7767f95 2997 if (likely(!ieee80211_is_ctl(bar->frame_control)))
9ae54c84 2998 return RX_CONTINUE;
71364716 2999
a7767f95 3000 if (ieee80211_is_back_req(bar->frame_control)) {
8ae5977f
JB		 3001 struct {
3002 __le16 control, start_seq_num;
3003 } __packed bar_data;
6382246e
EG		 3004 struct ieee80211_event event = {
3005 .type = BAR_RX_EVENT,
3006 };
8ae5977f 3007
71364716 3008 if (!rx->sta)
a02ae758 3009 return RX_DROP_MONITOR;
8ae5977f
JB		 3010
3011 if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control),
3012 &bar_data, sizeof(bar_data)))
3013 return RX_DROP_MONITOR;
3014
8ae5977f 3015 tid = le16_to_cpu(bar_data.control) >> 12;
a87f736d 3016
53f24974
JB		 3017 if (!test_bit(tid, rx->sta->ampdu_mlme.agg_session_valid) &&
3018 !test_and_set_bit(tid, rx->sta->ampdu_mlme.unexpected_agg))
3019 ieee80211_send_delba(rx->sdata, rx->sta->sta.addr, tid,
3020 WLAN_BACK_RECIPIENT,
3021 WLAN_REASON_QSTA_REQUIRE_SETUP);
3022
a87f736d
JB		 3023 tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]);
3024 if (!tid_agg_rx)
a02ae758 3025 return RX_DROP_MONITOR;
71364716 3026
8ae5977f 3027 start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4;
6382246e
EG		 3028 event.u.ba.tid = tid;
3029 event.u.ba.ssn = start_seq_num;
3030 event.u.ba.sta = &rx->sta->sta;
71364716
RR		 3031
3032 /* reset session timer */
20ad19d0
JB		 3033 if (tid_agg_rx->timeout)
3034 mod_timer(&tid_agg_rx->session_timer,
3035 TU_TO_EXP_TIME(tid_agg_rx->timeout));
71364716 3036
dd318575 3037 spin_lock(&tid_agg_rx->reorder_lock);
a02ae758 3038 /* release stored frames up to start of BAR */
d3b2fb53 3039 ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx,
f9e124fb 3040 start_seq_num, frames);
dd318575
JB		 3041 spin_unlock(&tid_agg_rx->reorder_lock);
3042
6382246e
EG		 3043 drv_event_callback(rx->local, rx->sdata, &event);
3044
a02ae758
JB		 3045 kfree_skb(skb);
3046 return RX_QUEUED;
71364716
RR		 3047 }
3048
08daecae
JB		 3049 /*
3050 * After this point, we only want management frames,
3051 * so we can drop all remaining control frames to
3052 * cooked monitor interfaces.
3053 */
3054 return RX_DROP_MONITOR;
71364716
RR		 3055}
3056
f4f727a6
JM		 3057static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata,
3058 struct ieee80211_mgmt *mgmt,
3059 size_t len)
fea14732
JM		 3060{
3061 struct ieee80211_local *local = sdata->local;
3062 struct sk_buff *skb;
3063 struct ieee80211_mgmt *resp;
3064
b203ca39 3065 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) {
fea14732
JM		 3066 /* Not to own unicast address */
3067 return;
3068 }
3069
b203ca39
JP		 3070 if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) ||
3071 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) {
77fdaa12 3072 /* Not from the current AP or not associated yet. */
fea14732
JM		 3073 return;
3074 }
3075
3076 if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) {
3077 /* Too short SA Query request frame */
3078 return;
3079 }
3080
3081 skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom);
3082 if (skb == NULL)
3083 return;
3084
3085 skb_reserve(skb, local->hw.extra_tx_headroom);
b080db58 3086 resp = skb_put_zero(skb, 24);
fea14732 3087 memcpy(resp->da, mgmt->sa, ETH_ALEN);
47846c9b 3088 memcpy(resp->sa, sdata->vif.addr, ETH_ALEN);
46900298 3089 memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN);
fea14732
JM		 3090 resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3091 IEEE80211_STYPE_ACTION);
3092 skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query));
3093 resp->u.action.category = WLAN_CATEGORY_SA_QUERY;
3094 resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE;
3095 memcpy(resp->u.action.u.sa_query.trans_id,
3096 mgmt->u.action.u.sa_query.trans_id,
3097 WLAN_SA_QUERY_TR_ID_LEN);
3098
62ae67be 3099 ieee80211_tx_skb(sdata, skb);
fea14732
JM		 3100}
3101
2e161f78
JB		 3102static ieee80211_rx_result debug_noinline
3103ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx)
3104{
3105 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
554891e6 3106 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
2e161f78
JB		 3107
3108 /*
3109 * From here on, look only at management frames.
3110 * Data and control frames are already handled,
3111 * and unknown (reserved) frames are useless.
3112 */
3113 if (rx->skb->len < 24)
3114 return RX_DROP_MONITOR;
3115
3116 if (!ieee80211_is_mgmt(mgmt->frame_control))
3117 return RX_DROP_MONITOR;
3118
ee971924
JB		 3119 if (rx->sdata->vif.type == NL80211_IFTYPE_AP &&
3120 ieee80211_is_beacon(mgmt->frame_control) &&
3121 !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) {
804483e9
JB		 3122 int sig = 0;
3123
1ad22fb5
T		 3124 if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM) &&
3125 !(status->flag & RX_FLAG_NO_SIGNAL_VAL))
804483e9
JB		 3126 sig = status->signal;
3127
e76fede8
TP		 3128 cfg80211_report_obss_beacon_khz(rx->local->hw.wiphy,
3129 rx->skb->data, rx->skb->len,
3130 ieee80211_rx_status_to_khz(status),
3131 sig);
ee971924
JB		 3132 rx->flags |= IEEE80211_RX_BEACON_REPORTED;
3133 }
3134
2e161f78
JB		 3135 if (ieee80211_drop_unencrypted_mgmt(rx))
3136 return RX_DROP_UNUSABLE;
3137
3138 return RX_CONTINUE;
3139}
3140
de1ede7a
JB		 3141static ieee80211_rx_result debug_noinline
3142ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
3143{
3144 struct ieee80211_local *local = rx->local;
eb9fb5b8 3145 struct ieee80211_sub_if_data *sdata = rx->sdata;
de1ede7a 3146 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
554891e6 3147 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
de1ede7a
JB		 3148 int len = rx->skb->len;
3149
3150 if (!ieee80211_is_action(mgmt->frame_control))
3151 return RX_CONTINUE;
3152
026331c4
JM		 3153 /* drop too small frames */
3154 if (len < IEEE80211_MIN_ACTION_SIZE)
84040805 3155 return RX_DROP_UNUSABLE;
de1ede7a 3156
815b8092 3157 if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC &&
cd7760e6
SW		 3158 mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED &&
3159 mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
84040805 3160 return RX_DROP_UNUSABLE;
de1ede7a 3161
de1ede7a 3162 switch (mgmt->u.action.category) {
1d8d3dec
JB		 3163 case WLAN_CATEGORY_HT:
3164 /* reject HT action frames from stations not supporting HT */
3165 if (!rx->sta->sta.ht_cap.ht_supported)
3166 goto invalid;
3167
3168 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3169 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3170 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3171 sdata->vif.type != NL80211_IFTYPE_AP &&
3172 sdata->vif.type != NL80211_IFTYPE_ADHOC)
3173 break;
3174
ec61cd63 3175 /* verify action & smps_control/chanwidth are present */
1d8d3dec
JB		 3176 if (len < IEEE80211_MIN_ACTION_SIZE + 2)
3177 goto invalid;
3178
3179 switch (mgmt->u.action.u.ht_smps.action) {
3180 case WLAN_HT_ACTION_SMPS: {
3181 struct ieee80211_supported_band *sband;
af0ed69b 3182 enum ieee80211_smps_mode smps_mode;
ff84e7bf 3183 struct sta_opmode_info sta_opmode = {};
1d8d3dec 3184
c4d800dc
IP		 3185 if (sdata->vif.type != NL80211_IFTYPE_AP &&
3186 sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
3187 goto handled;
3188
1d8d3dec
JB		 3189 /* convert to HT capability */
3190 switch (mgmt->u.action.u.ht_smps.smps_control) {
3191 case WLAN_HT_SMPS_CONTROL_DISABLED:
af0ed69b 3192 smps_mode = IEEE80211_SMPS_OFF;
1d8d3dec
JB		 3193 break;
3194 case WLAN_HT_SMPS_CONTROL_STATIC:
af0ed69b 3195 smps_mode = IEEE80211_SMPS_STATIC;
1d8d3dec
JB		 3196 break;
3197 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
af0ed69b 3198 smps_mode = IEEE80211_SMPS_DYNAMIC;
1d8d3dec
JB		 3199 break;
3200 default:
3201 goto invalid;
3202 }
1d8d3dec
JB		 3203
3204 /* if no change do nothing */
af0ed69b 3205 if (rx->sta->sta.smps_mode == smps_mode)
1d8d3dec 3206 goto handled;
af0ed69b 3207 rx->sta->sta.smps_mode = smps_mode;
57566b20 3208 sta_opmode.smps_mode =
3209 ieee80211_smps_mode_to_smps_mode(smps_mode);
ff84e7bf 3210 sta_opmode.changed = STA_OPMODE_SMPS_MODE_CHANGED;
1d8d3dec
JB		 3211
3212 sband = rx->local->hw.wiphy->bands[status->band];
3213
64f68e5d
JB		 3214 rate_control_rate_update(local, sband, rx->sta,
3215 IEEE80211_RC_SMPS_CHANGED);
ff84e7bf 3216 cfg80211_sta_opmode_change_notify(sdata->dev,
3217 rx->sta->addr,
3218 &sta_opmode,
c752cac9 3219 GFP_ATOMIC);
1d8d3dec
JB		 3220 goto handled;
3221 }
ec61cd63
JB		 3222 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
3223 struct ieee80211_supported_band *sband;
3224 u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
1c45c5ce 3225 enum ieee80211_sta_rx_bandwidth max_bw, new_bw;
ff84e7bf 3226 struct sta_opmode_info sta_opmode = {};
ec61cd63
JB		 3227
3228 /* If it doesn't support 40 MHz it can't change ... */
e1a0c6b3
JB		 3229 if (!(rx->sta->sta.ht_cap.cap &
3230 IEEE80211_HT_CAP_SUP_WIDTH_20_40))
ec61cd63
JB		 3231 goto handled;
3232
e1a0c6b3 3233 if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ)
1c45c5ce 3234 max_bw = IEEE80211_STA_RX_BW_20;
e1a0c6b3 3235 else
1c45c5ce
EP		 3236 max_bw = ieee80211_sta_cap_rx_bw(rx->sta);
3237
3238 /* set cur_max_bandwidth and recalc sta bw */
3239 rx->sta->cur_max_bandwidth = max_bw;
3240 new_bw = ieee80211_sta_cur_vht_bw(rx->sta);
ec61cd63 3241
e1a0c6b3 3242 if (rx->sta->sta.bandwidth == new_bw)
ec61cd63
JB		 3243 goto handled;
3244
1c45c5ce 3245 rx->sta->sta.bandwidth = new_bw;
ec61cd63 3246 sband = rx->local->hw.wiphy->bands[status->band];
97f5f425 3247 sta_opmode.bw =
3248 ieee80211_sta_rx_bw_to_chan_width(rx->sta);
ff84e7bf 3249 sta_opmode.changed = STA_OPMODE_MAX_BW_CHANGED;
ec61cd63
JB		 3250
3251 rate_control_rate_update(local, sband, rx->sta,
3252 IEEE80211_RC_BW_CHANGED);
ff84e7bf 3253 cfg80211_sta_opmode_change_notify(sdata->dev,
3254 rx->sta->addr,
3255 &sta_opmode,
c752cac9 3256 GFP_ATOMIC);
ec61cd63
JB		 3257 goto handled;
3258 }
1d8d3dec
JB		 3259 default:
3260 goto invalid;
3261 }
3262
0af83d3d 3263 break;
1b3a2e49
JB		 3264 case WLAN_CATEGORY_PUBLIC:
3265 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3266 goto invalid;
3267 if (sdata->vif.type != NL80211_IFTYPE_STATION)
3268 break;
3269 if (!rx->sta)
3270 break;
3271 if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid))
3272 break;
3273 if (mgmt->u.action.u.ext_chan_switch.action_code !=
3274 WLAN_PUB_ACTION_EXT_CHANSW_ANN)
3275 break;
3276 if (len < offsetof(struct ieee80211_mgmt,
3277 u.action.u.ext_chan_switch.variable))
3278 goto invalid;
3279 goto queue;
0af83d3d
JB		 3280 case WLAN_CATEGORY_VHT:
3281 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3282 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3283 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3284 sdata->vif.type != NL80211_IFTYPE_AP &&
3285 sdata->vif.type != NL80211_IFTYPE_ADHOC)
3286 break;
3287
3288 /* verify action code is present */
3289 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3290 goto invalid;
3291
3292 switch (mgmt->u.action.u.vht_opmode_notif.action_code) {
3293 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
0af83d3d
JB		 3294 /* verify opmode is present */
3295 if (len < IEEE80211_MIN_ACTION_SIZE + 2)
3296 goto invalid;
d2941df8 3297 goto queue;
0af83d3d 3298 }
23a1f8d4
SS		 3299 case WLAN_VHT_ACTION_GROUPID_MGMT: {
3300 if (len < IEEE80211_MIN_ACTION_SIZE + 25)
3301 goto invalid;
3302 goto queue;
3303 }
0af83d3d
JB		 3304 default:
3305 break;
3306 }
1d8d3dec 3307 break;
de1ede7a 3308 case WLAN_CATEGORY_BACK:
8abd3f9b 3309 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
ae2772b3 3310 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
8abd3f9b 3311 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
13c40c54
AS		 3312 sdata->vif.type != NL80211_IFTYPE_AP &&
3313 sdata->vif.type != NL80211_IFTYPE_ADHOC)
84040805 3314 break;
8abd3f9b 3315
026331c4
JM		 3316 /* verify action_code is present */
3317 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3318 break;
3319
de1ede7a
JB		 3320 switch (mgmt->u.action.u.addba_req.action_code) {
3321 case WLAN_ACTION_ADDBA_REQ:
3322 if (len < (IEEE80211_MIN_ACTION_SIZE +
3323 sizeof(mgmt->u.action.u.addba_req)))
bed7ee6e
JB		 3324 goto invalid;
3325 break;
de1ede7a
JB		 3326 case WLAN_ACTION_ADDBA_RESP:
3327 if (len < (IEEE80211_MIN_ACTION_SIZE +
3328 sizeof(mgmt->u.action.u.addba_resp)))
bed7ee6e
JB		 3329 goto invalid;
3330 break;
de1ede7a
JB		 3331 case WLAN_ACTION_DELBA:
3332 if (len < (IEEE80211_MIN_ACTION_SIZE +
3333 sizeof(mgmt->u.action.u.delba)))
bed7ee6e
JB		 3334 goto invalid;
3335 break;
3336 default:
3337 goto invalid;
de1ede7a 3338 }
bed7ee6e 3339
8b58ff83 3340 goto queue;
39192c0b 3341 case WLAN_CATEGORY_SPECTRUM_MGMT:
026331c4
JM		 3342 /* verify action_code is present */
3343 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3344 break;
3345
39192c0b
JB		 3346 switch (mgmt->u.action.u.measurement.action_code) {
3347 case WLAN_ACTION_SPCT_MSR_REQ:
57fbcce3 3348 if (status->band != NL80211_BAND_5GHZ)
cd7760e6
SW		 3349 break;
3350
39192c0b
JB		 3351 if (len < (IEEE80211_MIN_ACTION_SIZE +
3352 sizeof(mgmt->u.action.u.measurement)))
84040805 3353 break;
cd7760e6
SW		 3354
3355 if (sdata->vif.type != NL80211_IFTYPE_STATION)
3356 break;
3357
39192c0b 3358 ieee80211_process_measurement_req(sdata, mgmt, len);
84040805 3359 goto handled;
cd7760e6
SW		 3360 case WLAN_ACTION_SPCT_CHL_SWITCH: {
3361 u8 *bssid;
3362 if (len < (IEEE80211_MIN_ACTION_SIZE +
3363 sizeof(mgmt->u.action.u.chan_switch)))
84040805 3364 break;
cc32abd4 3365
cd7760e6 3366 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
b8456a14
CYY		 3367 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3368 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
cd7760e6
SW		 3369 break;
3370
3371 if (sdata->vif.type == NL80211_IFTYPE_STATION)
3372 bssid = sdata->u.mgd.bssid;
3373 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3374 bssid = sdata->u.ibss.bssid;
b8456a14
CYY		 3375 else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
3376 bssid = mgmt->sa;
cd7760e6
SW		 3377 else
3378 break;
3379
3380 if (!ether_addr_equal(mgmt->bssid, bssid))
84040805 3381 break;
c481ec97 3382
8b58ff83 3383 goto queue;
cd7760e6 3384 }
39192c0b
JB		 3385 }
3386 break;
8db09850 3387 case WLAN_CATEGORY_SELF_PROTECTED:
9b395bc3
JB		 3388 if (len < (IEEE80211_MIN_ACTION_SIZE +
3389 sizeof(mgmt->u.action.u.self_prot.action_code)))
3390 break;
3391
8db09850
TP		 3392 switch (mgmt->u.action.u.self_prot.action_code) {
3393 case WLAN_SP_MESH_PEERING_OPEN:
3394 case WLAN_SP_MESH_PEERING_CLOSE:
3395 case WLAN_SP_MESH_PEERING_CONFIRM:
3396 if (!ieee80211_vif_is_mesh(&sdata->vif))
3397 goto invalid;
a6dad6a2 3398 if (sdata->u.mesh.user_mpm)
8db09850
TP		 3399 /* userspace handles this frame */
3400 break;
3401 goto queue;
3402 case WLAN_SP_MGK_INFORM:
3403 case WLAN_SP_MGK_ACK:
3404 if (!ieee80211_vif_is_mesh(&sdata->vif))
3405 goto invalid;
3406 break;
3407 }
3408 break;
d3aaec8a 3409 case WLAN_CATEGORY_MESH_ACTION:
9b395bc3
JB		 3410 if (len < (IEEE80211_MIN_ACTION_SIZE +
3411 sizeof(mgmt->u.action.u.mesh_action.action_code)))
3412 break;
3413
77a121c3
JB		 3414 if (!ieee80211_vif_is_mesh(&sdata->vif))
3415 break;
25d49e4d 3416 if (mesh_action_is_path_sel(mgmt) &&
1df332e8 3417 !mesh_path_sel_is_hwmp(sdata))
c7108a71
JC		 3418 break;
3419 goto queue;
84040805 3420 }
026331c4 3421
2e161f78
JB		 3422 return RX_CONTINUE;
3423
bed7ee6e 3424 invalid:
554891e6 3425 status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM;
2e161f78
JB		 3426 /* will return in the next handlers */
3427 return RX_CONTINUE;
3428
3429 handled:
3430 if (rx->sta)
e5a9f8d0 3431 rx->sta->rx_stats.packets++;
2e161f78
JB		 3432 dev_kfree_skb(rx->skb);
3433 return RX_QUEUED;
3434
3435 queue:
2e161f78
JB		 3436 skb_queue_tail(&sdata->skb_queue, rx->skb);
3437 ieee80211_queue_work(&local->hw, &sdata->work);
3438 if (rx->sta)
e5a9f8d0 3439 rx->sta->rx_stats.packets++;
2e161f78
JB		 3440 return RX_QUEUED;
3441}
3442
3443static ieee80211_rx_result debug_noinline
3444ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx)
3445{
554891e6 3446 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
804483e9 3447 int sig = 0;
2e161f78
JB		 3448
3449 /* skip known-bad action frames and return them in the next handler */
554891e6 3450 if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM)
2e161f78 3451 return RX_CONTINUE;
d7907448 3452
026331c4
JM		 3453 /*
3454 * Getting here means the kernel doesn't know how to handle
3455 * it, but maybe userspace does ... include returned frames
3456 * so userspace can register for those to know whether ones
3457 * it transmitted were processed or returned.
3458 */
026331c4 3459
1ad22fb5
T		 3460 if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM) &&
3461 !(status->flag & RX_FLAG_NO_SIGNAL_VAL))
804483e9
JB		 3462 sig = status->signal;
3463
e76fede8
TP		 3464 if (cfg80211_rx_mgmt_khz(&rx->sdata->wdev,
3465 ieee80211_rx_status_to_khz(status), sig,
3466 rx->skb->data, rx->skb->len, 0)) {
2e161f78 3467 if (rx->sta)
e5a9f8d0 3468 rx->sta->rx_stats.packets++;
2e161f78
JB		 3469 dev_kfree_skb(rx->skb);
3470 return RX_QUEUED;
3471 }
3472
2e161f78
JB		 3473 return RX_CONTINUE;
3474}
3475
1ea02224
JB		 3476static ieee80211_rx_result debug_noinline
3477ieee80211_rx_h_action_post_userspace(struct ieee80211_rx_data *rx)
3478{
3479 struct ieee80211_sub_if_data *sdata = rx->sdata;
3480 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
3481 int len = rx->skb->len;
3482
3483 if (!ieee80211_is_action(mgmt->frame_control))
3484 return RX_CONTINUE;
3485
3486 switch (mgmt->u.action.category) {
3487 case WLAN_CATEGORY_SA_QUERY:
3488 if (len < (IEEE80211_MIN_ACTION_SIZE +
3489 sizeof(mgmt->u.action.u.sa_query)))
3490 break;
3491
3492 switch (mgmt->u.action.u.sa_query.action) {
3493 case WLAN_ACTION_SA_QUERY_REQUEST:
3494 if (sdata->vif.type != NL80211_IFTYPE_STATION)
3495 break;
3496 ieee80211_process_sa_query_req(sdata, mgmt, len);
3497 goto handled;
3498 }
3499 break;
3500 }
3501
3502 return RX_CONTINUE;
3503
3504 handled:
3505 if (rx->sta)
3506 rx->sta->rx_stats.packets++;
3507 dev_kfree_skb(rx->skb);
3508 return RX_QUEUED;
3509}
3510
2e161f78
JB		 3511static ieee80211_rx_result debug_noinline
3512ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx)
3513{
3514 struct ieee80211_local *local = rx->local;
3515 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
3516 struct sk_buff *nskb;
3517 struct ieee80211_sub_if_data *sdata = rx->sdata;
554891e6 3518 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
2e161f78
JB		 3519
3520 if (!ieee80211_is_action(mgmt->frame_control))
3521 return RX_CONTINUE;
3522
3523 /*
3524 * For AP mode, hostapd is responsible for handling any action
3525 * frames that we didn't handle, including returning unknown
3526 * ones. For all other modes we will return them to the sender,
3527 * setting the 0x80 bit in the action category, as required by
4b5ebccc 3528 * 802.11-2012 9.24.4.
2e161f78
JB		 3529 * Newer versions of hostapd shall also use the management frame
3530 * registration mechanisms, but older ones still use cooked
3531 * monitor interfaces so push all frames there.
3532 */
554891e6 3533 if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) &&
2e161f78
JB		 3534 (sdata->vif.type == NL80211_IFTYPE_AP ||
3535 sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
3536 return RX_DROP_MONITOR;
026331c4 3537
4b5ebccc
JB		 3538 if (is_multicast_ether_addr(mgmt->da))
3539 return RX_DROP_MONITOR;
3540
84040805
JB		 3541 /* do not return rejected action frames */
3542 if (mgmt->u.action.category & 0x80)
3543 return RX_DROP_UNUSABLE;
3544
3545 nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0,
3546 GFP_ATOMIC);
3547 if (nskb) {
292b4df6 3548 struct ieee80211_mgmt *nmgmt = (void *)nskb->data;
84040805 3549
292b4df6
JL		 3550 nmgmt->u.action.category |= 0x80;
3551 memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN);
3552 memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN);
84040805
JB		 3553
3554 memset(nskb->cb, 0, sizeof(nskb->cb));
3555
07e5a5f5
JB		 3556 if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
3557 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb);
3558
3559 info->flags = IEEE80211_TX_CTL_TX_OFFCHAN |
3560 IEEE80211_TX_INTFL_OFFCHAN_TX_OK |
3561 IEEE80211_TX_CTL_NO_CCK_RATE;
30686bf7 3562 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
07e5a5f5
JB		 3563 info->hw_queue =
3564 local->hw.offchannel_tx_hw_queue;
3565 }
3566
3567 __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7,
b9771d41 3568 status->band, 0);
de1ede7a 3569 }
39192c0b
JB		 3570 dev_kfree_skb(rx->skb);
3571 return RX_QUEUED;
de1ede7a
JB		 3572}
3573
49461622 3574static ieee80211_rx_result debug_noinline
5cf121c3 3575ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
571ecf67 3576{
eb9fb5b8 3577 struct ieee80211_sub_if_data *sdata = rx->sdata;
77a121c3
JB		 3578 struct ieee80211_mgmt *mgmt = (void *)rx->skb->data;
3579 __le16 stype;
571ecf67 3580
77a121c3 3581 stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE);
472dbc45 3582
77a121c3
JB		 3583 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
3584 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
239281f8 3585 sdata->vif.type != NL80211_IFTYPE_OCB &&
77a121c3
JB		 3586 sdata->vif.type != NL80211_IFTYPE_STATION)
3587 return RX_DROP_MONITOR;
472dbc45 3588
77a121c3 3589 switch (stype) {
66e67e41 3590 case cpu_to_le16(IEEE80211_STYPE_AUTH):
77a121c3
JB		 3591 case cpu_to_le16(IEEE80211_STYPE_BEACON):
3592 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
3593 /* process for all: mesh, mlme, ibss */
3594 break;
95697f99
JB		 3595 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
3596 if (is_multicast_ether_addr(mgmt->da) &&
3597 !is_broadcast_ether_addr(mgmt->da))
3598 return RX_DROP_MONITOR;
3599
3600 /* process only for station/IBSS */
3601 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3602 sdata->vif.type != NL80211_IFTYPE_ADHOC)
3603 return RX_DROP_MONITOR;
3604 break;
66e67e41
JB		 3605 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
3606 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
77a121c3 3607 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2c31333a
CL		 3608 if (is_multicast_ether_addr(mgmt->da) &&
3609 !is_broadcast_ether_addr(mgmt->da))
3610 return RX_DROP_MONITOR;
3611
77a121c3
JB		 3612 /* process only for station */
3613 if (sdata->vif.type != NL80211_IFTYPE_STATION)
3614 return RX_DROP_MONITOR;
3615 break;
3616 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
9fb04b50
TP		 3617 /* process only for ibss and mesh */
3618 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3619 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
77a121c3
JB		 3620 return RX_DROP_MONITOR;
3621 break;
3622 default:
3623 return RX_DROP_MONITOR;
3624 }
f9d540ee 3625
77a121c3
JB		 3626 /* queue up frame and kick off work to process it */
3627 skb_queue_tail(&sdata->skb_queue, rx->skb);
3628 ieee80211_queue_work(&rx->local->hw, &sdata->work);
8b58ff83 3629 if (rx->sta)
e5a9f8d0 3630 rx->sta->rx_stats.packets++;
46900298 3631
77a121c3 3632 return RX_QUEUED;
571ecf67
JB		 3633}
3634
5f0b7de5
JB		 3635static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
3636 struct ieee80211_rate *rate)
3d30d949
MW		 3637{
3638 struct ieee80211_sub_if_data *sdata;
3639 struct ieee80211_local *local = rx->local;
3d30d949
MW		 3640 struct sk_buff *skb = rx->skb, *skb2;
3641 struct net_device *prev_dev = NULL;
eb9fb5b8 3642 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
293702a3 3643 int needed_headroom;
3d30d949 3644
554891e6
JB		 3645 /*
3646 * If cooked monitor has been processed already, then
3647 * don't do it again. If not, set the flag.
3648 */
3649 if (rx->flags & IEEE80211_RX_CMNTR)
7c1e1831 3650 goto out_free_skb;
554891e6 3651 rx->flags |= IEEE80211_RX_CMNTR;
7c1e1831 3652
152c477a
JB		 3653 /* If there are no cooked monitor interfaces, just free the SKB */
3654 if (!local->cooked_mntrs)
3655 goto out_free_skb;
3656
1f7bba79
JB		 3657 /* vendor data is long removed here */
3658 status->flag &= ~RX_FLAG_RADIOTAP_VENDOR_DATA;
293702a3 3659 /* room for the radiotap header based on driver features */
1f7bba79 3660 needed_headroom = ieee80211_rx_radiotap_hdrlen(local, status, skb);
3d30d949 3661
293702a3
JB		 3662 if (skb_headroom(skb) < needed_headroom &&
3663 pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC))
3664 goto out_free_skb;
3d30d949 3665
293702a3 3666 /* prepend radiotap information */
973ef21a
FF		 3667 ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom,
3668 false);
3d30d949 3669
d57a544d 3670 skb_reset_mac_header(skb);
3d30d949
MW		 3671 skb->ip_summed = CHECKSUM_UNNECESSARY;
3672 skb->pkt_type = PACKET_OTHERHOST;
3673 skb->protocol = htons(ETH_P_802_2);
3674
3675 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
9607e6b6 3676 if (!ieee80211_sdata_running(sdata))
3d30d949
MW		 3677 continue;
3678
05c914fe 3679 if (sdata->vif.type != NL80211_IFTYPE_MONITOR ||
d8212184 3680 !(sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES))
3d30d949
MW		 3681 continue;
3682
3683 if (prev_dev) {
3684 skb2 = skb_clone(skb, GFP_ATOMIC);
3685 if (skb2) {
3686 skb2->dev = prev_dev;
5548a8a1 3687 netif_receive_skb(skb2);
3d30d949
MW		 3688 }
3689 }
3690
3691 prev_dev = sdata->dev;
5a490510 3692 ieee80211_rx_stats(sdata->dev, skb->len);
3d30d949
MW		 3693 }
3694
3695 if (prev_dev) {
3696 skb->dev = prev_dev;
5548a8a1 3697 netif_receive_skb(skb);
554891e6
JB		 3698 return;
3699 }
3d30d949
MW		 3700
3701 out_free_skb:
3702 dev_kfree_skb(skb);
3703}
3704
aa0c8636
CL		 3705static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx,
3706 ieee80211_rx_result res)
3707{
3708 switch (res) {
3709 case RX_DROP_MONITOR:
3710 I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
3711 if (rx->sta)
e5a9f8d0 3712 rx->sta->rx_stats.dropped++;
aa0c8636
CL		 3713 /* fall through */
3714 case RX_CONTINUE: {
3715 struct ieee80211_rate *rate = NULL;
3716 struct ieee80211_supported_band *sband;
3717 struct ieee80211_rx_status *status;
3718
3719 status = IEEE80211_SKB_RXCB((rx->skb));
3720
3721 sband = rx->local->hw.wiphy->bands[status->band];
41cbb0f5 3722 if (status->encoding == RX_ENC_LEGACY)
aa0c8636
CL		 3723 rate = &sband->bitrates[status->rate_idx];
3724
3725 ieee80211_rx_cooked_monitor(rx, rate);
3726 break;
3727 }
3728 case RX_DROP_UNUSABLE:
3729 I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
3730 if (rx->sta)
e5a9f8d0 3731 rx->sta->rx_stats.dropped++;
aa0c8636
CL		 3732 dev_kfree_skb(rx->skb);
3733 break;
3734 case RX_QUEUED:
3735 I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued);
3736 break;
3737 }
3738}
571ecf67 3739
f9e124fb
CL		 3740static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx,
3741 struct sk_buff_head *frames)
58905290 3742{
58905290 3743 ieee80211_rx_result res = RX_DROP_MONITOR;
aa0c8636 3744 struct sk_buff *skb;
8944b79f 3745
e32f85f7
LCC		 3746#define CALL_RXH(rxh) \
3747 do { \
3748 res = rxh(rx); \
3749 if (res != RX_CONTINUE) \
2569a826 3750 goto rxh_next; \
8ebaa5b0 3751 } while (0)
49461622 3752
45ceeee8
JB		 3753 /* Lock here to avoid hitting all of the data used in the RX
3754 * path (e.g. key data, station data, ...) concurrently when
3755 * a frame is released from the reorder buffer due to timeout
3756 * from the timer, potentially concurrently with RX from the
3757 * driver.
3758 */
f9e124fb 3759 spin_lock_bh(&rx->local->rx_path_lock);
24a8fdad 3760
f9e124fb 3761 while ((skb = __skb_dequeue(frames))) {
2569a826
JB		 3762 /*
3763 * all the other fields are valid across frames
3764 * that belong to an aMPDU since they are on the
3765 * same TID from the same station
3766 */
3767 rx->skb = skb;
3768
8ebaa5b0
JB		 3769 CALL_RXH(ieee80211_rx_h_check_more_data);
3770 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll);
3771 CALL_RXH(ieee80211_rx_h_sta_process);
3772 CALL_RXH(ieee80211_rx_h_decrypt);
3773 CALL_RXH(ieee80211_rx_h_defragment);
3774 CALL_RXH(ieee80211_rx_h_michael_mic_verify);
2569a826 3775 /* must be after MMIC verify so header is counted in MPDU mic */
bf94e17b 3776#ifdef CONFIG_MAC80211_MESH
aa0c8636 3777 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
2569a826 3778 CALL_RXH(ieee80211_rx_h_mesh_fwding);
bf94e17b 3779#endif
8ebaa5b0
JB		 3780 CALL_RXH(ieee80211_rx_h_amsdu);
3781 CALL_RXH(ieee80211_rx_h_data);
f9e124fb
CL		 3782
3783 /* special treatment -- needs the queue */
3784 res = ieee80211_rx_h_ctrl(rx, frames);
3785 if (res != RX_CONTINUE)
3786 goto rxh_next;
3787
8ebaa5b0
JB		 3788 CALL_RXH(ieee80211_rx_h_mgmt_check);
3789 CALL_RXH(ieee80211_rx_h_action);
3790 CALL_RXH(ieee80211_rx_h_userspace_mgmt);
1ea02224 3791 CALL_RXH(ieee80211_rx_h_action_post_userspace);
8ebaa5b0
JB		 3792 CALL_RXH(ieee80211_rx_h_action_return);
3793 CALL_RXH(ieee80211_rx_h_mgmt);
49461622 3794
aa0c8636
CL		 3795 rxh_next:
3796 ieee80211_rx_handlers_result(rx, res);
f9e124fb 3797
49461622 3798#undef CALL_RXH
aa0c8636 3799 }
24a8fdad 3800
f9e124fb 3801 spin_unlock_bh(&rx->local->rx_path_lock);
aa0c8636
CL		 3802}
3803
4406c376 3804static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx)
aa0c8636 3805{
f9e124fb 3806 struct sk_buff_head reorder_release;
aa0c8636
CL		 3807 ieee80211_rx_result res = RX_DROP_MONITOR;
3808
f9e124fb
CL		 3809 __skb_queue_head_init(&reorder_release);
3810
aa0c8636
CL		 3811#define CALL_RXH(rxh) \
3812 do { \
3813 res = rxh(rx); \
3814 if (res != RX_CONTINUE) \
3815 goto rxh_next; \
8ebaa5b0 3816 } while (0)
aa0c8636 3817
8ebaa5b0
JB		 3818 CALL_RXH(ieee80211_rx_h_check_dup);
3819 CALL_RXH(ieee80211_rx_h_check);
aa0c8636 3820
f9e124fb 3821 ieee80211_rx_reorder_ampdu(rx, &reorder_release);
aa0c8636 3822
f9e124fb 3823 ieee80211_rx_handlers(rx, &reorder_release);
aa0c8636 3824 return;
49461622 3825
2569a826 3826 rxh_next:
aa0c8636
CL		 3827 ieee80211_rx_handlers_result(rx, res);
3828
3829#undef CALL_RXH
58905290
JB		 3830}
3831
2bff8ebf 3832/*
dd318575
JB		 3833 * This function makes calls into the RX path, therefore
3834 * it has to be invoked under RCU read lock.
2bff8ebf
CL		 3835 */
3836void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid)
3837{
f9e124fb 3838 struct sk_buff_head frames;
554891e6
JB		 3839 struct ieee80211_rx_data rx = {
3840 .sta = sta,
3841 .sdata = sta->sdata,
3842 .local = sta->local,
9e26297a
JB		 3843 /* This is OK -- must be QoS data frame */
3844 .security_idx = tid,
3845 .seqno_idx = tid,
af9f9b22 3846 .napi = NULL, /* must be NULL to not have races */
554891e6 3847 };
2c15a0cf
CL		 3848 struct tid_ampdu_rx *tid_agg_rx;
3849
3850 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
3851 if (!tid_agg_rx)
3852 return;
2bff8ebf 3853
f9e124fb
CL		 3854 __skb_queue_head_init(&frames);
3855
2c15a0cf 3856 spin_lock(&tid_agg_rx->reorder_lock);
f9e124fb 3857 ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames);
2c15a0cf 3858 spin_unlock(&tid_agg_rx->reorder_lock);
2bff8ebf 3859
b497de63
EG		 3860 if (!skb_queue_empty(&frames)) {
3861 struct ieee80211_event event = {
3862 .type = BA_FRAME_TIMEOUT,
3863 .u.ba.tid = tid,
3864 .u.ba.sta = &sta->sta,
3865 };
3866 drv_event_callback(rx.local, rx.sdata, &event);
3867 }
3868
f9e124fb 3869 ieee80211_rx_handlers(&rx, &frames);
2bff8ebf
CL		 3870}
3871
06470f74
SS		 3872void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta *pubsta, u8 tid,
3873 u16 ssn, u64 filtered,
3874 u16 received_mpdus)
3875{
3876 struct sta_info *sta;
3877 struct tid_ampdu_rx *tid_agg_rx;
3878 struct sk_buff_head frames;
3879 struct ieee80211_rx_data rx = {
3880 /* This is OK -- must be QoS data frame */
3881 .security_idx = tid,
3882 .seqno_idx = tid,
3883 };
3884 int i, diff;
3885
3886 if (WARN_ON(!pubsta || tid >= IEEE80211_NUM_TIDS))
3887 return;
3888
3889 __skb_queue_head_init(&frames);
3890
3891 sta = container_of(pubsta, struct sta_info, sta);
3892
3893 rx.sta = sta;
3894 rx.sdata = sta->sdata;
3895 rx.local = sta->local;
3896
3897 rcu_read_lock();
3898 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
3899 if (!tid_agg_rx)
3900 goto out;
3901
3902 spin_lock_bh(&tid_agg_rx->reorder_lock);
3903
3904 if (received_mpdus >= IEEE80211_SN_MODULO >> 1) {
3905 int release;
3906
3907 /* release all frames in the reorder buffer */
3908 release = (tid_agg_rx->head_seq_num + tid_agg_rx->buf_size) %
3909 IEEE80211_SN_MODULO;
3910 ieee80211_release_reorder_frames(sta->sdata, tid_agg_rx,
3911 release, &frames);
3912 /* update ssn to match received ssn */
3913 tid_agg_rx->head_seq_num = ssn;
3914 } else {
3915 ieee80211_release_reorder_frames(sta->sdata, tid_agg_rx, ssn,
3916 &frames);
3917 }
3918
3919 /* handle the case that received ssn is behind the mac ssn.
3920 * it can be tid_agg_rx->buf_size behind and still be valid */
3921 diff = (tid_agg_rx->head_seq_num - ssn) & IEEE80211_SN_MASK;
3922 if (diff >= tid_agg_rx->buf_size) {
3923 tid_agg_rx->reorder_buf_filtered = 0;
3924 goto release;
3925 }
3926 filtered = filtered >> diff;
3927 ssn += diff;
3928
3929 /* update bitmap */
3930 for (i = 0; i < tid_agg_rx->buf_size; i++) {
3931 int index = (ssn + i) % tid_agg_rx->buf_size;
3932
3933 tid_agg_rx->reorder_buf_filtered &= ~BIT_ULL(index);
3934 if (filtered & BIT_ULL(i))
3935 tid_agg_rx->reorder_buf_filtered |= BIT_ULL(index);
3936 }
3937
3938 /* now process also frames that the filter marking released */
3939 ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames);
3940
3941release:
3942 spin_unlock_bh(&tid_agg_rx->reorder_lock);
3943
3944 ieee80211_rx_handlers(&rx, &frames);
3945
3946 out:
3947 rcu_read_unlock();
3948}
3949EXPORT_SYMBOL(ieee80211_mark_rx_ba_filtered_frames);
3950
571ecf67
JB		 3951/* main receive path */
3952
a58fbe1a 3953static bool ieee80211_accept_frame(struct ieee80211_rx_data *rx)
23a24def 3954{
20b01f80 3955 struct ieee80211_sub_if_data *sdata = rx->sdata;
eb9fb5b8 3956 struct sk_buff *skb = rx->skb;
a58fbe1a 3957 struct ieee80211_hdr *hdr = (void *)skb->data;
eb9fb5b8
JB		 3958 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
3959 u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type);
e5f2e067 3960 bool multicast = is_multicast_ether_addr(hdr->addr1);
23a24def 3961
51fb61e7 3962 switch (sdata->vif.type) {
05c914fe 3963 case NL80211_IFTYPE_STATION:
9bc383de 3964 if (!bssid && !sdata->u.mgd.use_4addr)
3c2723f5 3965 return false;
588f7d39
JB		 3966 if (ieee80211_is_robust_mgmt_frame(skb) && !rx->sta)
3967 return false;
a58fbe1a
JB		 3968 if (multicast)
3969 return true;
3970 return ether_addr_equal(sdata->vif.addr, hdr->addr1);
05c914fe 3971 case NL80211_IFTYPE_ADHOC:
23a24def 3972 if (!bssid)
3c2723f5 3973 return false;
6329b8d9
FF		 3974 if (ether_addr_equal(sdata->vif.addr, hdr->addr2) ||
3975 ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2))
3c2723f5 3976 return false;
a58fbe1a 3977 if (ieee80211_is_beacon(hdr->frame_control))
3c2723f5 3978 return true;
a58fbe1a 3979 if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid))
3c2723f5 3980 return false;
a58fbe1a
JB		 3981 if (!multicast &&
3982 !ether_addr_equal(sdata->vif.addr, hdr->addr1))
df140465 3983 return false;
a58fbe1a 3984 if (!rx->sta) {
0fb8ca45 3985 int rate_idx;
da6a4352 3986 if (status->encoding != RX_ENC_LEGACY)
5614618e 3987 rate_idx = 0; /* TODO: HT/VHT rates */
0fb8ca45 3988 else
eb9fb5b8 3989 rate_idx = status->rate_idx;
8bf11d8d
JB		 3990 ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2,
3991 BIT(rate_idx));
0fb8ca45 3992 }
a58fbe1a 3993 return true;
239281f8
RL		 3994 case NL80211_IFTYPE_OCB:
3995 if (!bssid)
3996 return false;
cc117298 3997 if (!ieee80211_is_data_present(hdr->frame_control))
239281f8 3998 return false;
a58fbe1a 3999 if (!is_broadcast_ether_addr(bssid))
239281f8 4000 return false;
a58fbe1a
JB		 4001 if (!multicast &&
4002 !ether_addr_equal(sdata->dev->dev_addr, hdr->addr1))
df140465 4003 return false;
a58fbe1a 4004 if (!rx->sta) {
239281f8 4005 int rate_idx;
da6a4352 4006 if (status->encoding != RX_ENC_LEGACY)
239281f8
RL		 4007 rate_idx = 0; /* TODO: HT rates */
4008 else
4009 rate_idx = status->rate_idx;
4010 ieee80211_ocb_rx_no_sta(sdata, bssid, hdr->addr2,
4011 BIT(rate_idx));
4012 }
a58fbe1a 4013 return true;
05c914fe 4014 case NL80211_IFTYPE_MESH_POINT:
736a80bb
JB		 4015 if (ether_addr_equal(sdata->vif.addr, hdr->addr2))
4016 return false;
a58fbe1a
JB		 4017 if (multicast)
4018 return true;
4019 return ether_addr_equal(sdata->vif.addr, hdr->addr1);
05c914fe
JB		 4020 case NL80211_IFTYPE_AP_VLAN:
4021 case NL80211_IFTYPE_AP:
a58fbe1a
JB		 4022 if (!bssid)
4023 return ether_addr_equal(sdata->vif.addr, hdr->addr1);
4024
4025 if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) {
3df6eaea
JB		 4026 /*
4027 * Accept public action frames even when the
4028 * BSSID doesn't match, this is used for P2P
4029 * and location updates. Note that mac80211
4030 * itself never looks at these frames.
4031 */
2b9ccd4e
JB		 4032 if (!multicast &&
4033 !ether_addr_equal(sdata->vif.addr, hdr->addr1))
3c2723f5 4034 return false;
d48b2968 4035 if (ieee80211_is_public_action(hdr, skb->len))
3c2723f5 4036 return true;
5c90067c 4037 return ieee80211_is_beacon(hdr->frame_control);
a58fbe1a
JB		 4038 }
4039
4040 if (!ieee80211_has_tods(hdr->frame_control)) {
db8e1732
AN		 4041 /* ignore data frames to TDLS-peers */
4042 if (ieee80211_is_data(hdr->frame_control))
4043 return false;
4044 /* ignore action frames to TDLS-peers */
4045 if (ieee80211_is_action(hdr->frame_control) &&
1ec7bae8 4046 !is_broadcast_ether_addr(bssid) &&
db8e1732
AN		 4047 !ether_addr_equal(bssid, hdr->addr1))
4048 return false;
23a24def 4049 }
3018e947
JB		 4050
4051 /*
4052 * 802.11-2016 Table 9-26 says that for data frames, A1 must be
4053 * the BSSID - we've checked that already but may have accepted
4054 * the wildcard (ff:ff:ff:ff:ff:ff).
4055 *
4056 * It also says:
4057 * The BSSID of the Data frame is determined as follows:
4058 * a) If the STA is contained within an AP or is associated
4059 * with an AP, the BSSID is the address currently in use
4060 * by the STA contained in the AP.
4061 *
4062 * So we should not accept data frames with an address that's
4063 * multicast.
4064 *
4065 * Accepting it also opens a security problem because stations
4066 * could encrypt it with the GTK and inject traffic that way.
4067 */
4068 if (ieee80211_is_data(hdr->frame_control) && multicast)
4069 return false;
4070
a58fbe1a 4071 return true;
05c914fe 4072 case NL80211_IFTYPE_WDS:
a7767f95 4073 if (bssid || !ieee80211_is_data(hdr->frame_control))
3c2723f5 4074 return false;
a58fbe1a 4075 return ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2);
f142c6b9 4076 case NL80211_IFTYPE_P2P_DEVICE:
a58fbe1a
JB		 4077 return ieee80211_is_public_action(hdr, skb->len) ||
4078 ieee80211_is_probe_req(hdr->frame_control) ||
4079 ieee80211_is_probe_resp(hdr->frame_control) ||
4080 ieee80211_is_beacon(hdr->frame_control);
cb3b7d87
AB		 4081 case NL80211_IFTYPE_NAN:
4082 /* Currently no frames on NAN interface are allowed */
4083 return false;
2ca27bcf 4084 default:
fb1c1cd6 4085 break;
23a24def
JB		 4086 }
4087
a58fbe1a
JB		 4088 WARN_ON_ONCE(1);
4089 return false;
23a24def
JB		 4090}
4091
49ddf8e6
JB		 4092void ieee80211_check_fast_rx(struct sta_info *sta)
4093{
4094 struct ieee80211_sub_if_data *sdata = sta->sdata;
4095 struct ieee80211_local *local = sdata->local;
4096 struct ieee80211_key *key;
4097 struct ieee80211_fast_rx fastrx = {
4098 .dev = sdata->dev,
4099 .vif_type = sdata->vif.type,
4100 .control_port_protocol = sdata->control_port_protocol,
4101 }, *old, *new = NULL;
4102 bool assign = false;
4103
4104 /* use sparse to check that we don't return without updating */
4105 __acquire(check_fast_rx);
4106
4107 BUILD_BUG_ON(sizeof(fastrx.rfc1042_hdr) != sizeof(rfc1042_header));
4108 BUILD_BUG_ON(sizeof(fastrx.rfc1042_hdr) != ETH_ALEN);
4109 ether_addr_copy(fastrx.rfc1042_hdr, rfc1042_header);
4110 ether_addr_copy(fastrx.vif_addr, sdata->vif.addr);
4111
c9c5962b
JB		 4112 fastrx.uses_rss = ieee80211_hw_check(&local->hw, USES_RSS);
4113
49ddf8e6
JB		 4114 /* fast-rx doesn't do reordering */
4115 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
4116 !ieee80211_hw_check(&local->hw, SUPPORTS_REORDERING_BUFFER))
4117 goto clear;
4118
4119 switch (sdata->vif.type) {
4120 case NL80211_IFTYPE_STATION:
49ddf8e6
JB		 4121 if (sta->sta.tdls) {
4122 fastrx.da_offs = offsetof(struct ieee80211_hdr, addr1);
4123 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr2);
4124 fastrx.expected_ds_bits = 0;
4125 } else {
4126 fastrx.sta_notify = sdata->u.mgd.probe_send_count > 0;
4127 fastrx.da_offs = offsetof(struct ieee80211_hdr, addr1);
4128 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr3);
4129 fastrx.expected_ds_bits =
4130 cpu_to_le16(IEEE80211_FCTL_FROMDS);
4131 }
1d870162 4132
9251a473
FF		 4133 if (sdata->u.mgd.use_4addr && !sta->sta.tdls) {
4134 fastrx.expected_ds_bits |=
4135 cpu_to_le16(IEEE80211_FCTL_TODS);
4136 fastrx.da_offs = offsetof(struct ieee80211_hdr, addr3);
4137 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr4);
4138 }
4139
1d870162
FF		 4140 if (!sdata->u.mgd.powersave)
4141 break;
4142
4143 /* software powersave is a huge mess, avoid all of it */
4144 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
4145 goto clear;
4146 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
4147 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
4148 goto clear;
49ddf8e6
JB		 4149 break;
4150 case NL80211_IFTYPE_AP_VLAN:
4151 case NL80211_IFTYPE_AP:
4152 /* parallel-rx requires this, at least with calls to
4153 * ieee80211_sta_ps_transition()
4154 */
4155 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
4156 goto clear;
4157 fastrx.da_offs = offsetof(struct ieee80211_hdr, addr3);
4158 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr2);
4159 fastrx.expected_ds_bits = cpu_to_le16(IEEE80211_FCTL_TODS);
4160
4161 fastrx.internal_forward =
4162 !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
4163 (sdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
4164 !sdata->u.vlan.sta);
59cae5b9
FF		 4165
4166 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
4167 sdata->u.vlan.sta) {
4168 fastrx.expected_ds_bits |=
4169 cpu_to_le16(IEEE80211_FCTL_FROMDS);
4170 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr4);
4171 fastrx.internal_forward = 0;
4172 }
4173
49ddf8e6
JB		 4174 break;
4175 default:
4176 goto clear;
4177 }
4178
4179 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
4180 goto clear;
4181
4182 rcu_read_lock();
4183 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4184 if (key) {
4185 switch (key->conf.cipher) {
4186 case WLAN_CIPHER_SUITE_TKIP:
4187 /* we don't want to deal with MMIC in fast-rx */
4188 goto clear_rcu;
4189 case WLAN_CIPHER_SUITE_CCMP:
4190 case WLAN_CIPHER_SUITE_CCMP_256:
4191 case WLAN_CIPHER_SUITE_GCMP:
4192 case WLAN_CIPHER_SUITE_GCMP_256:
4193 break;
4194 default:
96fc6efb
AW		 4195 /* We also don't want to deal with
4196 * WEP or cipher scheme.
49ddf8e6
JB		 4197 */
4198 goto clear_rcu;
4199 }
4200
4201 fastrx.key = true;
4202 fastrx.icv_len = key->conf.icv_len;
4203 }
4204
4205 assign = true;
4206 clear_rcu:
4207 rcu_read_unlock();
4208 clear:
4209 __release(check_fast_rx);
4210
4211 if (assign)
4212 new = kmemdup(&fastrx, sizeof(fastrx), GFP_KERNEL);
4213
4214 spin_lock_bh(&sta->lock);
4215 old = rcu_dereference_protected(sta->fast_rx, true);
4216 rcu_assign_pointer(sta->fast_rx, new);
4217 spin_unlock_bh(&sta->lock);
4218
4219 if (old)
4220 kfree_rcu(old, rcu_head);
4221}
4222
4223void ieee80211_clear_fast_rx(struct sta_info *sta)
4224{
4225 struct ieee80211_fast_rx *old;
4226
4227 spin_lock_bh(&sta->lock);
4228 old = rcu_dereference_protected(sta->fast_rx, true);
4229 RCU_INIT_POINTER(sta->fast_rx, NULL);
4230 spin_unlock_bh(&sta->lock);
4231
4232 if (old)
4233 kfree_rcu(old, rcu_head);
4234}
4235
4236void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata)
4237{
4238 struct ieee80211_local *local = sdata->local;
4239 struct sta_info *sta;
4240
4241 lockdep_assert_held(&local->sta_mtx);
4242
253216ff 4243 list_for_each_entry(sta, &local->sta_list, list) {
49ddf8e6
JB		 4244 if (sdata != sta->sdata &&
4245 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
4246 continue;
4247 ieee80211_check_fast_rx(sta);
4248 }
4249}
4250
4251void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata)
4252{
4253 struct ieee80211_local *local = sdata->local;
4254
4255 mutex_lock(&local->sta_mtx);
4256 __ieee80211_check_fast_rx_iface(sdata);
4257 mutex_unlock(&local->sta_mtx);
4258}
4259
4260static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
4261 struct ieee80211_fast_rx *fast_rx)
4262{
4263 struct sk_buff *skb = rx->skb;
4264 struct ieee80211_hdr *hdr = (void *)skb->data;
4265 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
4266 struct sta_info *sta = rx->sta;
4267 int orig_len = skb->len;
24bba078
FF		 4268 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
4269 int snap_offs = hdrlen;
49ddf8e6
JB		 4270 struct {
4271 u8 snap[sizeof(rfc1042_header)];
4272 __be16 proto;
4273 } *payload __aligned(2);
4274 struct {
4275 u8 da[ETH_ALEN];
4276 u8 sa[ETH_ALEN];
4277 } addrs __aligned(2);
c9c5962b
JB		 4278 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
4279
4280 if (fast_rx->uses_rss)
4281 stats = this_cpu_ptr(sta->pcpu_rx_stats);
49ddf8e6
JB		 4282
4283 /* for parallel-rx, we need to have DUP_VALIDATED, otherwise we write
4284 * to a common data structure; drivers can implement that per queue
4285 * but we don't have that information in mac80211
4286 */
4287 if (!(status->flag & RX_FLAG_DUP_VALIDATED))
4288 return false;
4289
4290#define FAST_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED)
4291
4292 /* If using encryption, we also need to have:
4293 * - PN_VALIDATED: similar, but the implementation is tricky
4294 * - DECRYPTED: necessary for PN_VALIDATED
4295 */
4296 if (fast_rx->key &&
4297 (status->flag & FAST_RX_CRYPT_FLAGS) != FAST_RX_CRYPT_FLAGS)
4298 return false;
4299
49ddf8e6
JB		 4300 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
4301 return false;
4302
4303 if (unlikely(ieee80211_is_frag(hdr)))
4304 return false;
4305
4306 /* Since our interface address cannot be multicast, this
4307 * implicitly also rejects multicast frames without the
4308 * explicit check.
4309 *
4310 * We shouldn't get any *data* frames not addressed to us
4311 * (AP mode will accept multicast *management* frames), but
4312 * punting here will make it go through the full checks in
4313 * ieee80211_accept_frame().
4314 */
4315 if (!ether_addr_equal(fast_rx->vif_addr, hdr->addr1))
4316 return false;
4317
4318 if ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_FROMDS |
4319 IEEE80211_FCTL_TODS)) !=
4320 fast_rx->expected_ds_bits)
b323ac19 4321 return false;
49ddf8e6
JB		 4322
4323 /* assign the key to drop unencrypted frames (later)
4324 * and strip the IV/MIC if necessary
4325 */
4326 if (fast_rx->key && !(status->flag & RX_FLAG_IV_STRIPPED)) {
4327 /* GCMP header length is the same */
4328 snap_offs += IEEE80211_CCMP_HDR_LEN;
4329 }
4330
24bba078
FF		 4331 if (!(status->rx_flags & IEEE80211_RX_AMSDU)) {
4332 if (!pskb_may_pull(skb, snap_offs + sizeof(*payload)))
4333 goto drop;
49ddf8e6 4334
24bba078 4335 payload = (void *)(skb->data + snap_offs);
49ddf8e6 4336
24bba078
FF		 4337 if (!ether_addr_equal(payload->snap, fast_rx->rfc1042_hdr))
4338 return false;
4339
4340 /* Don't handle these here since they require special code.
4341 * Accept AARP and IPX even though they should come with a
4342 * bridge-tunnel header - but if we get them this way then
4343 * there's little point in discarding them.
4344 */
4345 if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) ||
4346 payload->proto == fast_rx->control_port_protocol))
4347 return false;
4348 }
49ddf8e6
JB		 4349
4350 /* after this point, don't punt to the slowpath! */
4351
4352 if (rx->key && !(status->flag & RX_FLAG_MIC_STRIPPED) &&
4353 pskb_trim(skb, skb->len - fast_rx->icv_len))
4354 goto drop;
4355
4356 if (unlikely(fast_rx->sta_notify)) {
4357 ieee80211_sta_rx_notify(rx->sdata, hdr);
4358 fast_rx->sta_notify = false;
4359 }
4360
4361 /* statistics part of ieee80211_rx_h_sta_process() */
49ddf8e6 4362 if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
c9c5962b
JB		 4363 stats->last_signal = status->signal;
4364 if (!fast_rx->uses_rss)
4365 ewma_signal_add(&sta->rx_stats_avg.signal,
4366 -status->signal);
49ddf8e6
JB		 4367 }
4368
4369 if (status->chains) {
4370 int i;
4371
c9c5962b 4372 stats->chains = status->chains;
49ddf8e6
JB		 4373 for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) {
4374 int signal = status->chain_signal[i];
4375
4376 if (!(status->chains & BIT(i)))
4377 continue;
4378
c9c5962b
JB		 4379 stats->chain_signal_last[i] = signal;
4380 if (!fast_rx->uses_rss)
4381 ewma_signal_add(&sta->rx_stats_avg.chain_signal[i],
4382 -signal);
49ddf8e6
JB		 4383 }
4384 }
4385 /* end of statistics */
4386
4387 if (rx->key && !ieee80211_has_protected(hdr->frame_control))
4388 goto drop;
4389
24bba078
FF		 4390 if (status->rx_flags & IEEE80211_RX_AMSDU) {
4391 if (__ieee80211_rx_h_amsdu(rx, snap_offs - hdrlen) !=
4392 RX_QUEUED)
4393 goto drop;
4394
4395 return true;
4396 }
4397
4398 stats->last_rx = jiffies;
4399 stats->last_rate = sta_stats_encode_rate(status);
4400
4401 stats->fragments++;
4402 stats->packets++;
4403
49ddf8e6
JB		 4404 /* do the header conversion - first grab the addresses */
4405 ether_addr_copy(addrs.da, skb->data + fast_rx->da_offs);
4406 ether_addr_copy(addrs.sa, skb->data + fast_rx->sa_offs);
4407 /* remove the SNAP but leave the ethertype */
4408 skb_pull(skb, snap_offs + sizeof(rfc1042_header));
4409 /* push the addresses in front */
4410 memcpy(skb_push(skb, sizeof(addrs)), &addrs, sizeof(addrs));
4411
4412 skb->dev = fast_rx->dev;
4413
4414 ieee80211_rx_stats(fast_rx->dev, skb->len);
4415
4416 /* The seqno index has the same property as needed
4417 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
4418 * for non-QoS-data frames. Here we know it's a data
4419 * frame, so count MSDUs.
4420 */
c9c5962b
JB		 4421 u64_stats_update_begin(&stats->syncp);
4422 stats->msdu[rx->seqno_idx]++;
4423 stats->bytes += orig_len;
4424 u64_stats_update_end(&stats->syncp);
49ddf8e6
JB		 4425
4426 if (fast_rx->internal_forward) {
eeb0d56f 4427 struct sk_buff *xmit_skb = NULL;
42dca5ef 4428 if (is_multicast_ether_addr(addrs.da)) {
eeb0d56f 4429 xmit_skb = skb_copy(skb, GFP_ATOMIC);
42dca5ef
JB		 4430 } else if (!ether_addr_equal(addrs.da, addrs.sa) &&
4431 sta_info_get(rx->sdata, addrs.da)) {
eeb0d56f
JB		 4432 xmit_skb = skb;
4433 skb = NULL;
4434 }
49ddf8e6 4435
eeb0d56f 4436 if (xmit_skb) {
49ddf8e6
JB		 4437 /*
4438 * Send to wireless media and increase priority by 256
4439 * to keep the received priority instead of
4440 * reclassifying the frame (see cfg80211_classify8021d).
4441 */
eeb0d56f
JB		 4442 xmit_skb->priority += 256;
4443 xmit_skb->protocol = htons(ETH_P_802_3);
4444 skb_reset_network_header(xmit_skb);
4445 skb_reset_mac_header(xmit_skb);
4446 dev_queue_xmit(xmit_skb);
49ddf8e6 4447 }
eeb0d56f
JB		 4448
4449 if (!skb)
4450 return true;
49ddf8e6
JB		 4451 }
4452
4453 /* deliver to local stack */
4454 skb->protocol = eth_type_trans(skb, fast_rx->dev);
4455 memset(skb->cb, 0, sizeof(skb->cb));
4456 if (rx->napi)
4457 napi_gro_receive(rx->napi, skb);
4458 else
4459 netif_receive_skb(skb);
4460
4461 return true;
4462 drop:
4463 dev_kfree_skb(skb);
c9c5962b 4464 stats->dropped++;
49ddf8e6
JB		 4465 return true;
4466}
4467
4406c376
JB		 4468/*
4469 * This function returns whether or not the SKB
4470 * was destined for RX processing or not, which,
4471 * if consume is true, is equivalent to whether
4472 * or not the skb was consumed.
4473 */
4474static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx,
4475 struct sk_buff *skb, bool consume)
4476{
4477 struct ieee80211_local *local = rx->local;
4478 struct ieee80211_sub_if_data *sdata = rx->sdata;
4406c376
JB		 4479
4480 rx->skb = skb;
4406c376 4481
49ddf8e6
JB		 4482 /* See if we can do fast-rx; if we have to copy we already lost,
4483 * so punt in that case. We should never have to deliver a data
4484 * frame to multiple interfaces anyway.
4485 *
4486 * We skip the ieee80211_accept_frame() call and do the necessary
4487 * checking inside ieee80211_invoke_fast_rx().
4488 */
4489 if (consume && rx->sta) {
4490 struct ieee80211_fast_rx *fast_rx;
4491
4492 fast_rx = rcu_dereference(rx->sta->fast_rx);
4493 if (fast_rx && ieee80211_invoke_fast_rx(rx, fast_rx))
4494 return true;
4495 }
4496
a58fbe1a 4497 if (!ieee80211_accept_frame(rx))
4406c376
JB		 4498 return false;
4499
4406c376
JB		 4500 if (!consume) {
4501 skb = skb_copy(skb, GFP_ATOMIC);
4502 if (!skb) {
4503 if (net_ratelimit())
4504 wiphy_debug(local->hw.wiphy,
b305dae4 4505 "failed to copy skb for %s\n",
4406c376
JB		 4506 sdata->name);
4507 return true;
4508 }
4509
4510 rx->skb = skb;
4511 }
4512
4513 ieee80211_invoke_rx_handlers(rx);
4514 return true;
4515}
4516
571ecf67 4517/*
6b59db7d 4518 * This is the actual Rx frames handler. as it belongs to Rx path it must
6368e4b1 4519 * be called with rcu_read_lock protection.
571ecf67 4520 */
71ebb4aa 4521static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
d63b548f 4522 struct ieee80211_sta *pubsta,
af9f9b22
JB		 4523 struct sk_buff *skb,
4524 struct napi_struct *napi)
571ecf67
JB		 4525{
4526 struct ieee80211_local *local = hw_to_local(hw);
4527 struct ieee80211_sub_if_data *sdata;
571ecf67 4528 struct ieee80211_hdr *hdr;
e3cf8b3f 4529 __le16 fc;
5cf121c3 4530 struct ieee80211_rx_data rx;
4406c376 4531 struct ieee80211_sub_if_data *prev;
83e7e4ce 4532 struct rhlist_head *tmp;
e3cf8b3f 4533 int err = 0;
571ecf67 4534
e3cf8b3f 4535 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
571ecf67
JB		 4536 memset(&rx, 0, sizeof(rx));
4537 rx.skb = skb;
4538 rx.local = local;
af9f9b22 4539 rx.napi = napi;
72abd81b 4540
e3cf8b3f 4541 if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc))
c206ca67 4542 I802_DEBUG_INC(local->dot11ReceivedFragmentCount);
571ecf67 4543
4a4f1a58
JB		 4544 if (ieee80211_is_mgmt(fc)) {
4545 /* drop frame if too short for header */
4546 if (skb->len < ieee80211_hdrlen(fc))
4547 err = -ENOBUFS;
4548 else
4549 err = skb_linearize(skb);
4550 } else {
e3cf8b3f 4551 err = !pskb_may_pull(skb, ieee80211_hdrlen(fc));
4a4f1a58 4552 }
e3cf8b3f
ZY		 4553
4554 if (err) {
4555 dev_kfree_skb(skb);
4556 return;
4557 }
4558
4559 hdr = (struct ieee80211_hdr *)skb->data;
38f3714d 4560 ieee80211_parse_qos(&rx);
d1c3a37c 4561 ieee80211_verify_alignment(&rx);
38f3714d 4562
d48b2968
JB		 4563 if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) ||
4564 ieee80211_is_beacon(hdr->frame_control)))
4565 ieee80211_scan_rx(local, skb);
4566
19d19e96 4567 if (ieee80211_is_data(fc)) {
d63b548f 4568 struct sta_info *sta, *prev_sta;
7bedd0cf 4569
19d19e96
JB		 4570 if (pubsta) {
4571 rx.sta = container_of(pubsta, struct sta_info, sta);
4572 rx.sdata = rx.sta->sdata;
4573 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
4574 return;
4575 goto out;
4576 }
4577
56af3268 4578 prev_sta = NULL;
4406c376 4579
83e7e4ce 4580 for_each_sta_info(local, hdr->addr2, sta, tmp) {
56af3268
BG		 4581 if (!prev_sta) {
4582 prev_sta = sta;
4583 continue;
4584 }
4585
4586 rx.sta = prev_sta;
4587 rx.sdata = prev_sta->sdata;
4406c376 4588 ieee80211_prepare_and_rx_handle(&rx, skb, false);
abe60632 4589
56af3268 4590 prev_sta = sta;
4406c376 4591 }
56af3268
BG		 4592
4593 if (prev_sta) {
4594 rx.sta = prev_sta;
4595 rx.sdata = prev_sta->sdata;
4596
4406c376 4597 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
56af3268 4598 return;
8e26d5ad 4599 goto out;
56af3268 4600 }
4406c376
JB		 4601 }
4602
4b0dd98e 4603 prev = NULL;
b2e7771e 4604
4b0dd98e
JB		 4605 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4606 if (!ieee80211_sdata_running(sdata))
4607 continue;
340e11f3 4608
4b0dd98e
JB		 4609 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
4610 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4611 continue;
340e11f3 4612
4b0dd98e
JB		 4613 /*
4614 * frame is destined for this interface, but if it's
4615 * not also for the previous one we handle that after
4616 * the loop to avoid copying the SKB once too much
4617 */
4bb29f8c 4618
4b0dd98e 4619 if (!prev) {
abe60632 4620 prev = sdata;
4b0dd98e 4621 continue;
340e11f3 4622 }
4bb29f8c 4623
7852e361 4624 rx.sta = sta_info_get_bss(prev, hdr->addr2);
4b0dd98e
JB		 4625 rx.sdata = prev;
4626 ieee80211_prepare_and_rx_handle(&rx, skb, false);
4bb29f8c 4627
4b0dd98e
JB		 4628 prev = sdata;
4629 }
4630
4631 if (prev) {
7852e361 4632 rx.sta = sta_info_get_bss(prev, hdr->addr2);
4b0dd98e 4633 rx.sdata = prev;
4406c376 4634
4b0dd98e
JB		 4635 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
4636 return;
571ecf67 4637 }
4406c376 4638
8e26d5ad 4639 out:
4406c376 4640 dev_kfree_skb(skb);
571ecf67 4641}
6368e4b1
RR		 4642
4643/*
4644 * This is the receive path handler. It is called by a low level driver when an
4645 * 802.11 MPDU is received from the hardware.
4646 */
d63b548f
JB		 4647void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
4648 struct sk_buff *skb, struct napi_struct *napi)
6368e4b1
RR		 4649{
4650 struct ieee80211_local *local = hw_to_local(hw);
8318d78a
JB		 4651 struct ieee80211_rate *rate = NULL;
4652 struct ieee80211_supported_band *sband;
f1d58c25 4653 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
8318d78a 4654
d20ef63d
JB		 4655 WARN_ON_ONCE(softirq_count() == 0);
4656
57fbcce3 4657 if (WARN_ON(status->band >= NUM_NL80211_BANDS))
77a980dc 4658 goto drop;
8318d78a
JB		 4659
4660 sband = local->hw.wiphy->bands[status->band];
77a980dc
JB		 4661 if (WARN_ON(!sband))
4662 goto drop;
8318d78a 4663
89c3a8ac
JB		 4664 /*
4665 * If we're suspending, it is possible although not too likely
4666 * that we'd be receiving frames after having already partially
4667 * quiesced the stack. We can't process such frames then since
4668 * that might, for example, cause stations to be added or other
4669 * driver callbacks be invoked.
4670 */
77a980dc
JB		 4671 if (unlikely(local->quiescing || local->suspended))
4672 goto drop;
89c3a8ac 4673
04800ada
AN		 4674 /* We might be during a HW reconfig, prevent Rx for the same reason */
4675 if (unlikely(local->in_reconfig))
4676 goto drop;
4677
ea77f12f
JB		 4678 /*
4679 * The same happens when we're not even started,
4680 * but that's worth a warning.
4681 */
77a980dc
JB		 4682 if (WARN_ON(!local->started))
4683 goto drop;
ea77f12f 4684
fc885189 4685 if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) {
e5d6eb83 4686 /*
fc885189
JB		 4687 * Validate the rate, unless a PLCP error means that
4688 * we probably can't have a valid rate here anyway.
e5d6eb83 4689 */
fc885189 4690
da6a4352
JB		 4691 switch (status->encoding) {
4692 case RX_ENC_HT:
fc885189
JB		 4693 /*
4694 * rate_idx is MCS index, which can be [0-76]
4695 * as documented on:
4696 *
59d4bfc1 4697 * https://wireless.wiki.kernel.org/en/developers/Documentation/ieee80211/802.11n
fc885189
JB		 4698 *
4699 * Anything else would be some sort of driver or
4700 * hardware error. The driver should catch hardware
4701 * errors.
4702 */
444e3803 4703 if (WARN(status->rate_idx > 76,
fc885189
JB		 4704 "Rate marked as an HT rate but passed "
4705 "status->rate_idx is not "
4706 "an MCS index [0-76]: %d (0x%02x)\n",
4707 status->rate_idx,
4708 status->rate_idx))
4709 goto drop;
da6a4352
JB		 4710 break;
4711 case RX_ENC_VHT:
5614618e 4712 if (WARN_ONCE(status->rate_idx > 9 ||
8613c948
JB		 4713 !status->nss ||
4714 status->nss > 8,
5614618e 4715 "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
8613c948 4716 status->rate_idx, status->nss))
5614618e 4717 goto drop;
da6a4352 4718 break;
41cbb0f5
LC		 4719 case RX_ENC_HE:
4720 if (WARN_ONCE(status->rate_idx > 11 ||
4721 !status->nss ||
4722 status->nss > 8,
4723 "Rate marked as an HE rate but data is invalid: MCS: %d, NSS: %d\n",
4724 status->rate_idx, status->nss))
4725 goto drop;
4726 break;
da6a4352
JB		 4727 default:
4728 WARN_ON_ONCE(1);
4729 /* fall through */
4730 case RX_ENC_LEGACY:
444e3803 4731 if (WARN_ON(status->rate_idx >= sband->n_bitrates))
fc885189
JB		 4732 goto drop;
4733 rate = &sband->bitrates[status->rate_idx];
4734 }
0fb8ca45 4735 }
6368e4b1 4736
554891e6
JB		 4737 status->rx_flags = 0;
4738
6368e4b1
RR		 4739 /*
4740 * key references and virtual interfaces are protected using RCU
4741 * and this requires that we are in a read-side RCU section during
4742 * receive processing
4743 */
4744 rcu_read_lock();
4745
4746 /*
4747 * Frames with failed FCS/PLCP checksum are not returned,
4748 * all other frames are returned without radiotap header
4749 * if it was previously present.
4750 * Also, frames with less than 16 bytes are dropped.
4751 */
f1d58c25 4752 skb = ieee80211_rx_monitor(local, skb, rate);
6368e4b1
RR		 4753 if (!skb) {
4754 rcu_read_unlock();
4755 return;
4756 }
4757
e1e54068
JB		 4758 ieee80211_tpt_led_trig_rx(local,
4759 ((struct ieee80211_hdr *)skb->data)->frame_control,
4760 skb->len);
d63b548f
JB		 4761
4762 __ieee80211_rx_handle_packet(hw, pubsta, skb, napi);
6368e4b1
RR		 4763
4764 rcu_read_unlock();
77a980dc
JB		 4765
4766 return;
4767 drop:
4768 kfree_skb(skb);
6368e4b1 4769}
af9f9b22 4770EXPORT_SYMBOL(ieee80211_rx_napi);
571ecf67
JB		 4771
4772/* This is a version of the rx handler that can be called from hard irq
4773 * context. Post the skb on the queue and schedule the tasklet */
f1d58c25 4774void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb)
571ecf67
JB		 4775{
4776 struct ieee80211_local *local = hw_to_local(hw);
4777
4778 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
4779
571ecf67
JB		 4780 skb->pkt_type = IEEE80211_RX_MSG;
4781 skb_queue_tail(&local->skb_queue, skb);
4782 tasklet_schedule(&local->tasklet);
4783}
4784EXPORT_SYMBOL(ieee80211_rx_irqsafe);
Linux 6.x block layer and io_uring tree(s)