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mac80211: send (QoS) Null if no buffered frames
[mirror_ubuntu-hirsute-kernel.git] / net / mac80211 / rx.c
CommitLineData
571ecf67
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
84040805 5 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
571ecf67
JB		 6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
ab46623e 12#include <linux/jiffies.h>
5a0e3ad6 13#include <linux/slab.h>
571ecf67
JB		 14#include <linux/kernel.h>
15#include <linux/skbuff.h>
16#include <linux/netdevice.h>
17#include <linux/etherdevice.h>
d4e46a3d 18#include <linux/rcupdate.h>
571ecf67
JB		 19#include <net/mac80211.h>
20#include <net/ieee80211_radiotap.h>
21
22#include "ieee80211_i.h"
24487981 23#include "driver-ops.h"
2c8dccc7 24#include "led.h"
33b64eb2 25#include "mesh.h"
571ecf67
JB		 26#include "wep.h"
27#include "wpa.h"
28#include "tkip.h"
29#include "wme.h"
30
b2e7771e
JB		 31/*
32 * monitor mode reception
33 *
34 * This function cleans up the SKB, i.e. it removes all the stuff
35 * only useful for monitoring.
36 */
37static struct sk_buff *remove_monitor_info(struct ieee80211_local *local,
0869aea0 38 struct sk_buff *skb)
b2e7771e 39{
b2e7771e
JB		 40 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) {
41 if (likely(skb->len > FCS_LEN))
e3cf8b3f 42 __pskb_trim(skb, skb->len - FCS_LEN);
b2e7771e
JB		 43 else {
44 /* driver bug */
45 WARN_ON(1);
46 dev_kfree_skb(skb);
47 skb = NULL;
48 }
49 }
50
51 return skb;
52}
53
f1d58c25 54static inline int should_drop_frame(struct sk_buff *skb,
0869aea0 55 int present_fcs_len)
b2e7771e 56{
f1d58c25 57 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
182503ab 58 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
b2e7771e
JB		 59
60 if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
61 return 1;
0869aea0 62 if (unlikely(skb->len < 16 + present_fcs_len))
b2e7771e 63 return 1;
87228f57
HH		 64 if (ieee80211_is_ctl(hdr->frame_control) &&
65 !ieee80211_is_pspoll(hdr->frame_control) &&
66 !ieee80211_is_back_req(hdr->frame_control))
b2e7771e
JB		 67 return 1;
68 return 0;
69}
70
601ae7f2
BR		 71static int
72ieee80211_rx_radiotap_len(struct ieee80211_local *local,
73 struct ieee80211_rx_status *status)
74{
75 int len;
76
77 /* always present fields */
78 len = sizeof(struct ieee80211_radiotap_header) + 9;
79
6ebacbb7 80 if (status->flag & RX_FLAG_MACTIME_MPDU)
601ae7f2 81 len += 8;
7fee5372 82 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
601ae7f2 83 len += 1;
601ae7f2
BR		 84
85 if (len & 1) /* padding for RX_FLAGS if necessary */
86 len++;
87
6d744bac
JB		 88 if (status->flag & RX_FLAG_HT) /* HT info */
89 len += 3;
90
601ae7f2
BR		 91 return len;
92}
93
d1c3a37c 94/*
601ae7f2
BR		 95 * ieee80211_add_rx_radiotap_header - add radiotap header
96 *
97 * add a radiotap header containing all the fields which the hardware provided.
98 */
99static void
100ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
101 struct sk_buff *skb,
601ae7f2
BR		 102 struct ieee80211_rate *rate,
103 int rtap_len)
104{
f1d58c25 105 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
601ae7f2
BR		 106 struct ieee80211_radiotap_header *rthdr;
107 unsigned char *pos;
6a86b9c7 108 u16 rx_flags = 0;
601ae7f2
BR		 109
110 rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len);
111 memset(rthdr, 0, rtap_len);
112
113 /* radiotap header, set always present flags */
114 rthdr->it_present =
115 cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
601ae7f2
BR		 116 (1 << IEEE80211_RADIOTAP_CHANNEL) |
117 (1 << IEEE80211_RADIOTAP_ANTENNA) |
118 (1 << IEEE80211_RADIOTAP_RX_FLAGS));
119 rthdr->it_len = cpu_to_le16(rtap_len);
120
121 pos = (unsigned char *)(rthdr+1);
122
123 /* the order of the following fields is important */
124
125 /* IEEE80211_RADIOTAP_TSFT */
6ebacbb7 126 if (status->flag & RX_FLAG_MACTIME_MPDU) {
6a86b9c7 127 put_unaligned_le64(status->mactime, pos);
601ae7f2
BR		 128 rthdr->it_present |=
129 cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT);
130 pos += 8;
131 }
132
133 /* IEEE80211_RADIOTAP_FLAGS */
134 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
135 *pos |= IEEE80211_RADIOTAP_F_FCS;
aae89831
JB		 136 if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
137 *pos |= IEEE80211_RADIOTAP_F_BADFCS;
b4f28bbb
BR		 138 if (status->flag & RX_FLAG_SHORTPRE)
139 *pos |= IEEE80211_RADIOTAP_F_SHORTPRE;
601ae7f2
BR		 140 pos++;
141
142 /* IEEE80211_RADIOTAP_RATE */
0fb8ca45
JM		 143 if (status->flag & RX_FLAG_HT) {
144 /*
38f37be2 145 * MCS information is a separate field in radiotap,
73b48099
JB		 146 * added below. The byte here is needed as padding
147 * for the channel though, so initialise it to 0.
0fb8ca45
JM		 148 */
149 *pos = 0;
8d6f658e 150 } else {
ebe6c7ba 151 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
0fb8ca45 152 *pos = rate->bitrate / 5;
8d6f658e 153 }
601ae7f2
BR		 154 pos++;
155
156 /* IEEE80211_RADIOTAP_CHANNEL */
6a86b9c7 157 put_unaligned_le16(status->freq, pos);
601ae7f2
BR		 158 pos += 2;
159 if (status->band == IEEE80211_BAND_5GHZ)
6a86b9c7
JB		 160 put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ,
161 pos);
5f0b7de5
JB		 162 else if (status->flag & RX_FLAG_HT)
163 put_unaligned_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ,
164 pos);
9deb1ae5 165 else if (rate->flags & IEEE80211_RATE_ERP_G)
6a86b9c7
JB		 166 put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ,
167 pos);
601ae7f2 168 else
6a86b9c7
JB		 169 put_unaligned_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ,
170 pos);
601ae7f2
BR		 171 pos += 2;
172
173 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
174 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
175 *pos = status->signal;
176 rthdr->it_present |=
177 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
178 pos++;
179 }
180
601ae7f2
BR		 181 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
182
183 /* IEEE80211_RADIOTAP_ANTENNA */
184 *pos = status->antenna;
185 pos++;
186
601ae7f2
BR		 187 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
188
189 /* IEEE80211_RADIOTAP_RX_FLAGS */
190 /* ensure 2 byte alignment for the 2 byte field as required */
6a86b9c7 191 if ((pos - (u8 *)rthdr) & 1)
601ae7f2 192 pos++;
aae89831 193 if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
6a86b9c7
JB		 194 rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP;
195 put_unaligned_le16(rx_flags, pos);
601ae7f2 196 pos += 2;
6d744bac
JB		 197
198 if (status->flag & RX_FLAG_HT) {
199 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
200 *pos++ = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
201 IEEE80211_RADIOTAP_MCS_HAVE_GI |
202 IEEE80211_RADIOTAP_MCS_HAVE_BW;
203 *pos = 0;
204 if (status->flag & RX_FLAG_SHORT_GI)
205 *pos |= IEEE80211_RADIOTAP_MCS_SGI;
206 if (status->flag & RX_FLAG_40MHZ)
207 *pos |= IEEE80211_RADIOTAP_MCS_BW_40;
208 pos++;
209 *pos++ = status->rate_idx;
210 }
601ae7f2
BR		 211}
212
b2e7771e
JB		 213/*
214 * This function copies a received frame to all monitor interfaces and
215 * returns a cleaned-up SKB that no longer includes the FCS nor the
216 * radiotap header the driver might have added.
217 */
218static struct sk_buff *
219ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
8318d78a 220 struct ieee80211_rate *rate)
b2e7771e 221{
f1d58c25 222 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb);
b2e7771e 223 struct ieee80211_sub_if_data *sdata;
b2e7771e 224 int needed_headroom = 0;
b2e7771e
JB		 225 struct sk_buff *skb, *skb2;
226 struct net_device *prev_dev = NULL;
227 int present_fcs_len = 0;
b2e7771e
JB		 228
229 /*
230 * First, we may need to make a copy of the skb because
231 * (1) we need to modify it for radiotap (if not present), and
232 * (2) the other RX handlers will modify the skb we got.
233 *
234 * We don't need to, of course, if we aren't going to return
235 * the SKB because it has a bad FCS/PLCP checksum.
236 */
0869aea0
JB		 237
238 /* room for the radiotap header based on driver features */
239 needed_headroom = ieee80211_rx_radiotap_len(local, status);
b2e7771e
JB		 240
241 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
242 present_fcs_len = FCS_LEN;
243
e3cf8b3f
ZY		 244 /* make sure hdr->frame_control is on the linear part */
245 if (!pskb_may_pull(origskb, 2)) {
246 dev_kfree_skb(origskb);
247 return NULL;
248 }
249
b2e7771e 250 if (!local->monitors) {
0869aea0 251 if (should_drop_frame(origskb, present_fcs_len)) {
b2e7771e
JB		 252 dev_kfree_skb(origskb);
253 return NULL;
254 }
255
0869aea0 256 return remove_monitor_info(local, origskb);
b2e7771e
JB		 257 }
258
0869aea0 259 if (should_drop_frame(origskb, present_fcs_len)) {
b2e7771e
JB		 260 /* only need to expand headroom if necessary */
261 skb = origskb;
262 origskb = NULL;
263
264 /*
265 * This shouldn't trigger often because most devices have an
266 * RX header they pull before we get here, and that should
267 * be big enough for our radiotap information. We should
268 * probably export the length to drivers so that we can have
269 * them allocate enough headroom to start with.
270 */
271 if (skb_headroom(skb) < needed_headroom &&
c49e5ea3 272 pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) {
b2e7771e
JB		 273 dev_kfree_skb(skb);
274 return NULL;
275 }
276 } else {
277 /*
278 * Need to make a copy and possibly remove radiotap header
279 * and FCS from the original.
280 */
281 skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC);
282
0869aea0 283 origskb = remove_monitor_info(local, origskb);
b2e7771e
JB		 284
285 if (!skb)
286 return origskb;
287 }
288
0869aea0
JB		 289 /* prepend radiotap information */
290 ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom);
b2e7771e 291
ce3edf6d 292 skb_reset_mac_header(skb);
b2e7771e
JB		 293 skb->ip_summed = CHECKSUM_UNNECESSARY;
294 skb->pkt_type = PACKET_OTHERHOST;
295 skb->protocol = htons(ETH_P_802_2);
296
297 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
05c914fe 298 if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
b2e7771e
JB		 299 continue;
300
3d30d949
MW		 301 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)
302 continue;
303
9607e6b6 304 if (!ieee80211_sdata_running(sdata))
47846c9b
JB		 305 continue;
306
b2e7771e
JB		 307 if (prev_dev) {
308 skb2 = skb_clone(skb, GFP_ATOMIC);
309 if (skb2) {
310 skb2->dev = prev_dev;
5548a8a1 311 netif_receive_skb(skb2);
b2e7771e
JB		 312 }
313 }
314
315 prev_dev = sdata->dev;
316 sdata->dev->stats.rx_packets++;
317 sdata->dev->stats.rx_bytes += skb->len;
318 }
319
320 if (prev_dev) {
321 skb->dev = prev_dev;
5548a8a1 322 netif_receive_skb(skb);
b2e7771e
JB		 323 } else
324 dev_kfree_skb(skb);
325
326 return origskb;
327}
328
329
5cf121c3 330static void ieee80211_parse_qos(struct ieee80211_rx_data *rx)
6e0d114d 331{
238f74a2 332 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
554891e6 333 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
9e26297a 334 int tid, seqno_idx, security_idx;
6e0d114d
JB		 335
336 /* does the frame have a qos control field? */
238f74a2
HH		 337 if (ieee80211_is_data_qos(hdr->frame_control)) {
338 u8 *qc = ieee80211_get_qos_ctl(hdr);
6e0d114d 339 /* frame has qos control */
238f74a2 340 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
04b7dcf9 341 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
554891e6 342 status->rx_flags |= IEEE80211_RX_AMSDU;
9e26297a
JB		 343
344 seqno_idx = tid;
345 security_idx = tid;
6e0d114d 346 } else {
1411f9b5
JB		 347 /*
348 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
349 *
350 * Sequence numbers for management frames, QoS data
351 * frames with a broadcast/multicast address in the
352 * Address 1 field, and all non-QoS data frames sent
353 * by QoS STAs are assigned using an additional single
354 * modulo-4096 counter, [...]
355 *
356 * We also use that counter for non-QoS STAs.
357 */
9e26297a
JB		 358 seqno_idx = NUM_RX_DATA_QUEUES;
359 security_idx = 0;
360 if (ieee80211_is_mgmt(hdr->frame_control))
361 security_idx = NUM_RX_DATA_QUEUES;
362 tid = 0;
6e0d114d 363 }
52865dfd 364
9e26297a
JB		 365 rx->seqno_idx = seqno_idx;
366 rx->security_idx = security_idx;
6e0d114d
JB		 367 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
368 * For now, set skb->priority to 0 for other cases. */
369 rx->skb->priority = (tid > 7) ? 0 : tid;
38f3714d 370}
6e0d114d 371
d1c3a37c
JB		 372/**
373 * DOC: Packet alignment
374 *
375 * Drivers always need to pass packets that are aligned to two-byte boundaries
376 * to the stack.
377 *
378 * Additionally, should, if possible, align the payload data in a way that
379 * guarantees that the contained IP header is aligned to a four-byte
380 * boundary. In the case of regular frames, this simply means aligning the
381 * payload to a four-byte boundary (because either the IP header is directly
382 * contained, or IV/RFC1042 headers that have a length divisible by four are
59d9cb07
KV		 383 * in front of it). If the payload data is not properly aligned and the
384 * architecture doesn't support efficient unaligned operations, mac80211
385 * will align the data.
d1c3a37c
JB		 386 *
387 * With A-MSDU frames, however, the payload data address must yield two modulo
388 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
389 * push the IP header further back to a multiple of four again. Thankfully, the
390 * specs were sane enough this time around to require padding each A-MSDU
391 * subframe to a length that is a multiple of four.
392 *
25985edc 393 * Padding like Atheros hardware adds which is between the 802.11 header and
d1c3a37c
JB		 394 * the payload is not supported, the driver is required to move the 802.11
395 * header to be directly in front of the payload in that case.
396 */
397static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx)
38f3714d 398{
59d9cb07
KV		 399#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
400 WARN_ONCE((unsigned long)rx->skb->data & 1,
401 "unaligned packet at 0x%p\n", rx->skb->data);
d1c3a37c 402#endif
6e0d114d
JB		 403}
404
6368e4b1 405
571ecf67
JB		 406/* rx handlers */
407
49461622 408static ieee80211_rx_result debug_noinline
5cf121c3 409ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx)
571ecf67
JB		 410{
411 struct ieee80211_local *local = rx->local;
554891e6 412 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
571ecf67
JB		 413 struct sk_buff *skb = rx->skb;
414
79f460ca
LC		 415 if (likely(!(status->rx_flags & IEEE80211_RX_IN_SCAN) &&
416 !local->sched_scanning))
4080c7cd
JB		 417 return RX_CONTINUE;
418
b23b025f 419 if (test_bit(SCAN_HW_SCANNING, &local->scanning) ||
79f460ca
LC		 420 test_bit(SCAN_SW_SCANNING, &local->scanning) ||
421 local->sched_scanning)
f1d58c25 422 return ieee80211_scan_rx(rx->sdata, skb);
ece8eddd 423
4080c7cd
JB		 424 /* scanning finished during invoking of handlers */
425 I802_DEBUG_INC(local->rx_handlers_drop_passive_scan);
426 return RX_DROP_UNUSABLE;
571ecf67
JB		 427}
428
3cfcf6ac
JM		 429
430static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb)
431{
432 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
433
434 if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1))
435 return 0;
436
437 return ieee80211_is_robust_mgmt_frame(hdr);
438}
439
440
441static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb)
442{
443 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
444
445 if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1))
446 return 0;
447
448 return ieee80211_is_robust_mgmt_frame(hdr);
449}
450
451
452/* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
453static int ieee80211_get_mmie_keyidx(struct sk_buff *skb)
454{
455 struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data;
456 struct ieee80211_mmie *mmie;
457
458 if (skb->len < 24 + sizeof(*mmie) ||
459 !is_multicast_ether_addr(hdr->da))
460 return -1;
461
462 if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr))
463 return -1; /* not a robust management frame */
464
465 mmie = (struct ieee80211_mmie *)
466 (skb->data + skb->len - sizeof(*mmie));
467 if (mmie->element_id != WLAN_EID_MMIE ||
468 mmie->length != sizeof(*mmie) - 2)
469 return -1;
470
471 return le16_to_cpu(mmie->key_id);
472}
473
474
33b64eb2 475static ieee80211_rx_result
5cf121c3 476ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
33b64eb2 477{
a7767f95 478 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
47846c9b 479 char *dev_addr = rx->sdata->vif.addr;
d6d1a5a7 480
a7767f95 481 if (ieee80211_is_data(hdr->frame_control)) {
3c5772a5
JC		 482 if (is_multicast_ether_addr(hdr->addr1)) {
483 if (ieee80211_has_tods(hdr->frame_control) ||
484 !ieee80211_has_fromds(hdr->frame_control))
485 return RX_DROP_MONITOR;
486 if (memcmp(hdr->addr3, dev_addr, ETH_ALEN) == 0)
487 return RX_DROP_MONITOR;
488 } else {
489 if (!ieee80211_has_a4(hdr->frame_control))
490 return RX_DROP_MONITOR;
491 if (memcmp(hdr->addr4, dev_addr, ETH_ALEN) == 0)
492 return RX_DROP_MONITOR;
493 }
33b64eb2
LCC		 494 }
495
496 /* If there is not an established peer link and this is not a peer link
497 * establisment frame, beacon or probe, drop the frame.
498 */
499
57cf8043 500 if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) {
33b64eb2 501 struct ieee80211_mgmt *mgmt;
d6d1a5a7 502
a7767f95 503 if (!ieee80211_is_mgmt(hdr->frame_control))
33b64eb2
LCC		 504 return RX_DROP_MONITOR;
505
a7767f95 506 if (ieee80211_is_action(hdr->frame_control)) {
d3aaec8a 507 u8 category;
33b64eb2 508 mgmt = (struct ieee80211_mgmt *)hdr;
d3aaec8a
JC		 509 category = mgmt->u.action.category;
510 if (category != WLAN_CATEGORY_MESH_ACTION &&
511 category != WLAN_CATEGORY_SELF_PROTECTED)
33b64eb2 512 return RX_DROP_MONITOR;
33b64eb2 513 return RX_CONTINUE;
33b64eb2
LCC		 514 }
515
a7767f95
HH		 516 if (ieee80211_is_probe_req(hdr->frame_control) ||
517 ieee80211_is_probe_resp(hdr->frame_control) ||
71839121
JC		 518 ieee80211_is_beacon(hdr->frame_control) ||
519 ieee80211_is_auth(hdr->frame_control))
a7767f95
HH		 520 return RX_CONTINUE;
521
522 return RX_DROP_MONITOR;
523
524 }
525
902acc78
JB		 526 return RX_CONTINUE;
527}
33b64eb2 528
1edfb1af
JB		 529#define SEQ_MODULO 0x1000
530#define SEQ_MASK 0xfff
531
532static inline int seq_less(u16 sq1, u16 sq2)
533{
534 return ((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1);
535}
536
537static inline u16 seq_inc(u16 sq)
538{
539 return (sq + 1) & SEQ_MASK;
540}
541
542static inline u16 seq_sub(u16 sq1, u16 sq2)
543{
544 return (sq1 - sq2) & SEQ_MASK;
545}
546
547
548static void ieee80211_release_reorder_frame(struct ieee80211_hw *hw,
549 struct tid_ampdu_rx *tid_agg_rx,
24a8fdad 550 int index)
1edfb1af 551{
24a8fdad 552 struct ieee80211_local *local = hw_to_local(hw);
1edfb1af 553 struct sk_buff *skb = tid_agg_rx->reorder_buf[index];
4cfda47b 554 struct ieee80211_rx_status *status;
1edfb1af 555
dd318575
JB		 556 lockdep_assert_held(&tid_agg_rx->reorder_lock);
557
1edfb1af
JB		 558 if (!skb)
559 goto no_frame;
560
071d9ac2 561 /* release the frame from the reorder ring buffer */
1edfb1af
JB		 562 tid_agg_rx->stored_mpdu_num--;
563 tid_agg_rx->reorder_buf[index] = NULL;
4cfda47b
CL		 564 status = IEEE80211_SKB_RXCB(skb);
565 status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE;
24a8fdad 566 skb_queue_tail(&local->rx_skb_queue, skb);
1edfb1af
JB		 567
568no_frame:
569 tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num);
570}
571
572static void ieee80211_release_reorder_frames(struct ieee80211_hw *hw,
573 struct tid_ampdu_rx *tid_agg_rx,
24a8fdad 574 u16 head_seq_num)
1edfb1af
JB		 575{
576 int index;
577
dd318575
JB		 578 lockdep_assert_held(&tid_agg_rx->reorder_lock);
579
1edfb1af
JB		 580 while (seq_less(tid_agg_rx->head_seq_num, head_seq_num)) {
581 index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) %
582 tid_agg_rx->buf_size;
24a8fdad 583 ieee80211_release_reorder_frame(hw, tid_agg_rx, index);
1edfb1af
JB		 584 }
585}
586
587/*
588 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
589 * the skb was added to the buffer longer than this time ago, the earlier
590 * frames that have not yet been received are assumed to be lost and the skb
591 * can be released for processing. This may also release other skb's from the
592 * reorder buffer if there are no additional gaps between the frames.
2bff8ebf
CL		 593 *
594 * Callers must hold tid_agg_rx->reorder_lock.
1edfb1af
JB		 595 */
596#define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
597
aa0c8636 598static void ieee80211_sta_reorder_release(struct ieee80211_hw *hw,
24a8fdad 599 struct tid_ampdu_rx *tid_agg_rx)
aa0c8636 600{
2bff8ebf 601 int index, j;
aa0c8636 602
dd318575
JB		 603 lockdep_assert_held(&tid_agg_rx->reorder_lock);
604
aa0c8636
CL		 605 /* release the buffer until next missing frame */
606 index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) %
607 tid_agg_rx->buf_size;
608 if (!tid_agg_rx->reorder_buf[index] &&
609 tid_agg_rx->stored_mpdu_num > 1) {
610 /*
611 * No buffers ready to be released, but check whether any
612 * frames in the reorder buffer have timed out.
613 */
aa0c8636
CL		 614 int skipped = 1;
615 for (j = (index + 1) % tid_agg_rx->buf_size; j != index;
616 j = (j + 1) % tid_agg_rx->buf_size) {
617 if (!tid_agg_rx->reorder_buf[j]) {
618 skipped++;
619 continue;
620 }
499fe9a4
DH		 621 if (skipped &&
622 !time_after(jiffies, tid_agg_rx->reorder_time[j] +
aa0c8636 623 HT_RX_REORDER_BUF_TIMEOUT))
2bff8ebf 624 goto set_release_timer;
aa0c8636
CL		 625
626#ifdef CONFIG_MAC80211_HT_DEBUG
627 if (net_ratelimit())
0fb9a9ec
JP		 628 wiphy_debug(hw->wiphy,
629 "release an RX reorder frame due to timeout on earlier frames\n");
aa0c8636 630#endif
24a8fdad 631 ieee80211_release_reorder_frame(hw, tid_agg_rx, j);
aa0c8636
CL		 632
633 /*
634 * Increment the head seq# also for the skipped slots.
635 */
636 tid_agg_rx->head_seq_num =
637 (tid_agg_rx->head_seq_num + skipped) & SEQ_MASK;
638 skipped = 0;
639 }
640 } else while (tid_agg_rx->reorder_buf[index]) {
24a8fdad 641 ieee80211_release_reorder_frame(hw, tid_agg_rx, index);
aa0c8636
CL		 642 index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) %
643 tid_agg_rx->buf_size;
644 }
2bff8ebf
CL		 645
646 if (tid_agg_rx->stored_mpdu_num) {
647 j = index = seq_sub(tid_agg_rx->head_seq_num,
648 tid_agg_rx->ssn) % tid_agg_rx->buf_size;
649
650 for (; j != (index - 1) % tid_agg_rx->buf_size;
651 j = (j + 1) % tid_agg_rx->buf_size) {
652 if (tid_agg_rx->reorder_buf[j])
653 break;
654 }
655
656 set_release_timer:
657
658 mod_timer(&tid_agg_rx->reorder_timer,
334df731 659 tid_agg_rx->reorder_time[j] + 1 +
2bff8ebf
CL		 660 HT_RX_REORDER_BUF_TIMEOUT);
661 } else {
662 del_timer(&tid_agg_rx->reorder_timer);
663 }
aa0c8636
CL		 664}
665
1edfb1af
JB		 666/*
667 * As this function belongs to the RX path it must be under
668 * rcu_read_lock protection. It returns false if the frame
669 * can be processed immediately, true if it was consumed.
670 */
671static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
672 struct tid_ampdu_rx *tid_agg_rx,
24a8fdad 673 struct sk_buff *skb)
1edfb1af
JB		 674{
675 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
676 u16 sc = le16_to_cpu(hdr->seq_ctrl);
677 u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
678 u16 head_seq_num, buf_size;
679 int index;
2bff8ebf 680 bool ret = true;
1edfb1af 681
dd318575
JB		 682 spin_lock(&tid_agg_rx->reorder_lock);
683
1edfb1af
JB		 684 buf_size = tid_agg_rx->buf_size;
685 head_seq_num = tid_agg_rx->head_seq_num;
686
687 /* frame with out of date sequence number */
688 if (seq_less(mpdu_seq_num, head_seq_num)) {
689 dev_kfree_skb(skb);
2bff8ebf 690 goto out;
1edfb1af
JB		 691 }
692
693 /*
694 * If frame the sequence number exceeds our buffering window
695 * size release some previous frames to make room for this one.
696 */
697 if (!seq_less(mpdu_seq_num, head_seq_num + buf_size)) {
698 head_seq_num = seq_inc(seq_sub(mpdu_seq_num, buf_size));
699 /* release stored frames up to new head to stack */
24a8fdad 700 ieee80211_release_reorder_frames(hw, tid_agg_rx, head_seq_num);
1edfb1af
JB		 701 }
702
703 /* Now the new frame is always in the range of the reordering buffer */
704
705 index = seq_sub(mpdu_seq_num, tid_agg_rx->ssn) % tid_agg_rx->buf_size;
706
707 /* check if we already stored this frame */
708 if (tid_agg_rx->reorder_buf[index]) {
709 dev_kfree_skb(skb);
2bff8ebf 710 goto out;
1edfb1af
JB		 711 }
712
713 /*
714 * If the current MPDU is in the right order and nothing else
715 * is stored we can process it directly, no need to buffer it.
c835b214
JB		 716 * If it is first but there's something stored, we may be able
717 * to release frames after this one.
1edfb1af
JB		 718 */
719 if (mpdu_seq_num == tid_agg_rx->head_seq_num &&
720 tid_agg_rx->stored_mpdu_num == 0) {
721 tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num);
2bff8ebf
CL		 722 ret = false;
723 goto out;
1edfb1af
JB		 724 }
725
726 /* put the frame in the reordering buffer */
727 tid_agg_rx->reorder_buf[index] = skb;
728 tid_agg_rx->reorder_time[index] = jiffies;
729 tid_agg_rx->stored_mpdu_num++;
24a8fdad 730 ieee80211_sta_reorder_release(hw, tid_agg_rx);
1edfb1af 731
2bff8ebf
CL		 732 out:
733 spin_unlock(&tid_agg_rx->reorder_lock);
734 return ret;
1edfb1af
JB		 735}
736
737/*
738 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
739 * true if the MPDU was buffered, false if it should be processed.
740 */
24a8fdad 741static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx)
1edfb1af 742{
2569a826
JB		 743 struct sk_buff *skb = rx->skb;
744 struct ieee80211_local *local = rx->local;
1edfb1af
JB		 745 struct ieee80211_hw *hw = &local->hw;
746 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2569a826 747 struct sta_info *sta = rx->sta;
1edfb1af
JB		 748 struct tid_ampdu_rx *tid_agg_rx;
749 u16 sc;
750 int tid;
751
752 if (!ieee80211_is_data_qos(hdr->frame_control))
2569a826 753 goto dont_reorder;
1edfb1af
JB		 754
755 /*
756 * filter the QoS data rx stream according to
757 * STA/TID and check if this STA/TID is on aggregation
758 */
759
1edfb1af 760 if (!sta)
2569a826 761 goto dont_reorder;
1edfb1af
JB		 762
763 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
764
a87f736d
JB		 765 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
766 if (!tid_agg_rx)
767 goto dont_reorder;
1edfb1af
JB		 768
769 /* qos null data frames are excluded */
770 if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC)))
a87f736d 771 goto dont_reorder;
1edfb1af
JB		 772
773 /* new, potentially un-ordered, ampdu frame - process it */
774
775 /* reset session timer */
776 if (tid_agg_rx->timeout)
777 mod_timer(&tid_agg_rx->session_timer,
778 TU_TO_EXP_TIME(tid_agg_rx->timeout));
779
780 /* if this mpdu is fragmented - terminate rx aggregation session */
781 sc = le16_to_cpu(hdr->seq_ctrl);
782 if (sc & IEEE80211_SCTL_FRAG) {
c1475ca9 783 skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME;
344eec67
JB		 784 skb_queue_tail(&rx->sdata->skb_queue, skb);
785 ieee80211_queue_work(&local->hw, &rx->sdata->work);
2569a826 786 return;
1edfb1af
JB		 787 }
788
a87f736d
JB		 789 /*
790 * No locking needed -- we will only ever process one
791 * RX packet at a time, and thus own tid_agg_rx. All
792 * other code manipulating it needs to (and does) make
793 * sure that we cannot get to it any more before doing
794 * anything with it.
795 */
24a8fdad 796 if (ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb))
2569a826
JB		 797 return;
798
799 dont_reorder:
24a8fdad 800 skb_queue_tail(&local->rx_skb_queue, skb);
1edfb1af 801}
33b64eb2 802
49461622 803static ieee80211_rx_result debug_noinline
5cf121c3 804ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
571ecf67 805{
a7767f95 806 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
554891e6 807 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
571ecf67
JB		 808
809 /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
810 if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
a7767f95 811 if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
9e26297a 812 rx->sta->last_seq_ctrl[rx->seqno_idx] ==
571ecf67 813 hdr->seq_ctrl)) {
554891e6 814 if (status->rx_flags & IEEE80211_RX_RA_MATCH) {
571ecf67
JB		 815 rx->local->dot11FrameDuplicateCount++;
816 rx->sta->num_duplicates++;
817 }
b1f93314 818 return RX_DROP_UNUSABLE;
571ecf67 819 } else
9e26297a 820 rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl;
571ecf67
JB		 821 }
822
571ecf67
JB		 823 if (unlikely(rx->skb->len < 16)) {
824 I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
e4c26add 825 return RX_DROP_MONITOR;
571ecf67
JB		 826 }
827
571ecf67
JB		 828 /* Drop disallowed frame classes based on STA auth/assoc state;
829 * IEEE 802.11, Chap 5.5.
830 *
ccd7b362
JB		 831 * mac80211 filters only based on association state, i.e. it drops
832 * Class 3 frames from not associated stations. hostapd sends
571ecf67
JB		 833 * deauth/disassoc frames when needed. In addition, hostapd is
834 * responsible for filtering on both auth and assoc states.
835 */
33b64eb2 836
902acc78 837 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
33b64eb2 838 return ieee80211_rx_mesh_check(rx);
33b64eb2 839
a7767f95
HH		 840 if (unlikely((ieee80211_is_data(hdr->frame_control) ||
841 ieee80211_is_pspoll(hdr->frame_control)) &&
05c914fe 842 rx->sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1be7fe8d 843 rx->sdata->vif.type != NL80211_IFTYPE_WDS &&
2a33bee2
GE		 844 (!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) {
845 if (rx->sta && rx->sta->dummy &&
846 ieee80211_is_data_present(hdr->frame_control)) {
847 u16 ethertype;
848 u8 *payload;
849
850 payload = rx->skb->data +
851 ieee80211_hdrlen(hdr->frame_control);
852 ethertype = (payload[6] << 8) | payload[7];
853 if (cpu_to_be16(ethertype) ==
854 rx->sdata->control_port_protocol)
855 return RX_CONTINUE;
856 }
e4c26add 857 return RX_DROP_MONITOR;
2a33bee2 858 }
571ecf67 859
9ae54c84 860 return RX_CONTINUE;
570bd537
JB		 861}
862
863
49461622 864static ieee80211_rx_result debug_noinline
5cf121c3 865ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
570bd537 866{
eb9fb5b8
JB		 867 struct sk_buff *skb = rx->skb;
868 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
869 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
3017b80b
JB		 870 int keyidx;
871 int hdrlen;
e4c26add 872 ieee80211_rx_result result = RX_DROP_UNUSABLE;
e31b8213 873 struct ieee80211_key *sta_ptk = NULL;
3cfcf6ac 874 int mmie_keyidx = -1;
761ab470 875 __le16 fc;
570bd537 876
3017b80b
JB		 877 /*
878 * Key selection 101
879 *
3cfcf6ac 880 * There are four types of keys:
3017b80b 881 * - GTK (group keys)
3cfcf6ac 882 * - IGTK (group keys for management frames)
3017b80b
JB		 883 * - PTK (pairwise keys)
884 * - STK (station-to-station pairwise keys)
885 *
886 * When selecting a key, we have to distinguish between multicast
887 * (including broadcast) and unicast frames, the latter can only
3cfcf6ac
JM		 888 * use PTKs and STKs while the former always use GTKs and IGTKs.
889 * Unless, of course, actual WEP keys ("pre-RSNA") are used, then
890 * unicast frames can also use key indices like GTKs. Hence, if we
891 * don't have a PTK/STK we check the key index for a WEP key.
3017b80b 892 *
8dc06a1c
JB		 893 * Note that in a regular BSS, multicast frames are sent by the
894 * AP only, associated stations unicast the frame to the AP first
895 * which then multicasts it on their behalf.
896 *
3017b80b
JB		 897 * There is also a slight problem in IBSS mode: GTKs are negotiated
898 * with each station, that is something we don't currently handle.
8dc06a1c
JB		 899 * The spec seems to expect that one negotiates the same key with
900 * every station but there's no such requirement; VLANs could be
901 * possible.
3017b80b
JB		 902 */
903
3017b80b 904 /*
1990af8d 905 * No point in finding a key and decrypting if the frame is neither
3017b80b
JB		 906 * addressed to us nor a multicast frame.
907 */
554891e6 908 if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
9ae54c84 909 return RX_CONTINUE;
3017b80b 910
2569a826
JB		 911 /* start without a key */
912 rx->key = NULL;
913
d4e46a3d 914 if (rx->sta)
e31b8213 915 sta_ptk = rcu_dereference(rx->sta->ptk);
d4e46a3d 916
761ab470
JB		 917 fc = hdr->frame_control;
918
919 if (!ieee80211_has_protected(fc))
0c7c10c7
JM		 920 mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb);
921
e31b8213
JB		 922 if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) {
923 rx->key = sta_ptk;
dc1580dd
JB		 924 if ((status->flag & RX_FLAG_DECRYPTED) &&
925 (status->flag & RX_FLAG_IV_STRIPPED))
926 return RX_CONTINUE;
0c7c10c7 927 /* Skip decryption if the frame is not protected. */
761ab470 928 if (!ieee80211_has_protected(fc))
0c7c10c7 929 return RX_CONTINUE;
3cfcf6ac
JM		 930 } else if (mmie_keyidx >= 0) {
931 /* Broadcast/multicast robust management frame / BIP */
eb9fb5b8
JB		 932 if ((status->flag & RX_FLAG_DECRYPTED) &&
933 (status->flag & RX_FLAG_IV_STRIPPED))
3cfcf6ac
JM		 934 return RX_CONTINUE;
935
936 if (mmie_keyidx < NUM_DEFAULT_KEYS ||
937 mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
938 return RX_DROP_MONITOR; /* unexpected BIP keyidx */
e31b8213
JB		 939 if (rx->sta)
940 rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]);
941 if (!rx->key)
942 rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]);
761ab470 943 } else if (!ieee80211_has_protected(fc)) {
0c7c10c7
JM		 944 /*
945 * The frame was not protected, so skip decryption. However, we
946 * need to set rx->key if there is a key that could have been
947 * used so that the frame may be dropped if encryption would
948 * have been expected.
949 */
950 struct ieee80211_key *key = NULL;
897bed8b
JB		 951 struct ieee80211_sub_if_data *sdata = rx->sdata;
952 int i;
953
761ab470 954 if (ieee80211_is_mgmt(fc) &&
0c7c10c7
JM		 955 is_multicast_ether_addr(hdr->addr1) &&
956 (key = rcu_dereference(rx->sdata->default_mgmt_key)))
957 rx->key = key;
897bed8b
JB		 958 else {
959 if (rx->sta) {
960 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
961 key = rcu_dereference(rx->sta->gtk[i]);
962 if (key)
963 break;
964 }
965 }
966 if (!key) {
967 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
968 key = rcu_dereference(sdata->keys[i]);
969 if (key)
970 break;
971 }
972 }
973 if (key)
974 rx->key = key;
975 }
0c7c10c7 976 return RX_CONTINUE;
571ecf67 977 } else {
39184b15 978 u8 keyid;
3017b80b
JB		 979 /*
980 * The device doesn't give us the IV so we won't be
981 * able to look up the key. That's ok though, we
982 * don't need to decrypt the frame, we just won't
983 * be able to keep statistics accurate.
984 * Except for key threshold notifications, should
985 * we somehow allow the driver to tell us which key
986 * the hardware used if this flag is set?
987 */
eb9fb5b8
JB		 988 if ((status->flag & RX_FLAG_DECRYPTED) &&
989 (status->flag & RX_FLAG_IV_STRIPPED))
9ae54c84 990 return RX_CONTINUE;
3017b80b 991
761ab470 992 hdrlen = ieee80211_hdrlen(fc);
3017b80b
JB		 993
994 if (rx->skb->len < 8 + hdrlen)
e4c26add 995 return RX_DROP_UNUSABLE; /* TODO: count this? */
3017b80b
JB		 996
997 /*
998 * no need to call ieee80211_wep_get_keyidx,
999 * it verifies a bunch of things we've done already
1000 */
39184b15
ZY		 1001 skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1);
1002 keyidx = keyid >> 6;
3017b80b 1003
e31b8213
JB		 1004 /* check per-station GTK first, if multicast packet */
1005 if (is_multicast_ether_addr(hdr->addr1) && rx->sta)
1006 rx->key = rcu_dereference(rx->sta->gtk[keyidx]);
3017b80b 1007
e31b8213
JB		 1008 /* if not found, try default key */
1009 if (!rx->key) {
1010 rx->key = rcu_dereference(rx->sdata->keys[keyidx]);
1011
1012 /*
1013 * RSNA-protected unicast frames should always be
1014 * sent with pairwise or station-to-station keys,
1015 * but for WEP we allow using a key index as well.
1016 */
1017 if (rx->key &&
1018 rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 &&
1019 rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 &&
1020 !is_multicast_ether_addr(hdr->addr1))
1021 rx->key = NULL;
1022 }
571ecf67
JB		 1023 }
1024
3017b80b 1025 if (rx->key) {
95acac61
JB		 1026 if (unlikely(rx->key->flags & KEY_FLAG_TAINTED))
1027 return RX_DROP_MONITOR;
1028
571ecf67 1029 rx->key->tx_rx_count++;
011bfcc4 1030 /* TODO: add threshold stuff again */
1990af8d 1031 } else {
e4c26add 1032 return RX_DROP_MONITOR;
70f08765
JB		 1033 }
1034
39184b15
ZY		 1035 if (skb_linearize(rx->skb))
1036 return RX_DROP_UNUSABLE;
761ab470 1037 /* the hdr variable is invalid now! */
1990af8d 1038
97359d12
JB		 1039 switch (rx->key->conf.cipher) {
1040 case WLAN_CIPHER_SUITE_WEP40:
1041 case WLAN_CIPHER_SUITE_WEP104:
761ab470
JB		 1042 /* Check for weak IVs if possible */
1043 if (rx->sta && ieee80211_is_data(fc) &&
1044 (!(status->flag & RX_FLAG_IV_STRIPPED) ||
1045 !(status->flag & RX_FLAG_DECRYPTED)) &&
1046 ieee80211_wep_is_weak_iv(rx->skb, rx->key))
1047 rx->sta->wep_weak_iv_count++;
1048
e2f036da
MN		 1049 result = ieee80211_crypto_wep_decrypt(rx);
1050 break;
97359d12 1051 case WLAN_CIPHER_SUITE_TKIP:
e2f036da
MN		 1052 result = ieee80211_crypto_tkip_decrypt(rx);
1053 break;
97359d12 1054 case WLAN_CIPHER_SUITE_CCMP:
e2f036da
MN		 1055 result = ieee80211_crypto_ccmp_decrypt(rx);
1056 break;
97359d12 1057 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac
JM		 1058 result = ieee80211_crypto_aes_cmac_decrypt(rx);
1059 break;
3ffc2a90
JB		 1060 default:
1061 /*
1062 * We can reach here only with HW-only algorithms
1063 * but why didn't it decrypt the frame?!
1064 */
1065 return RX_DROP_UNUSABLE;
70f08765
JB		 1066 }
1067
e2f036da 1068 /* either the frame has been decrypted or will be dropped */
eb9fb5b8 1069 status->flag |= RX_FLAG_DECRYPTED;
e2f036da
MN		 1070
1071 return result;
70f08765
JB		 1072}
1073
572e0012
KV		 1074static ieee80211_rx_result debug_noinline
1075ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx)
1076{
1077 struct ieee80211_local *local;
1078 struct ieee80211_hdr *hdr;
1079 struct sk_buff *skb;
1080
1081 local = rx->local;
1082 skb = rx->skb;
1083 hdr = (struct ieee80211_hdr *) skb->data;
1084
1085 if (!local->pspolling)
1086 return RX_CONTINUE;
1087
1088 if (!ieee80211_has_fromds(hdr->frame_control))
1089 /* this is not from AP */
1090 return RX_CONTINUE;
1091
1092 if (!ieee80211_is_data(hdr->frame_control))
1093 return RX_CONTINUE;
1094
1095 if (!ieee80211_has_moredata(hdr->frame_control)) {
1096 /* AP has no more frames buffered for us */
1097 local->pspolling = false;
1098 return RX_CONTINUE;
1099 }
1100
1101 /* more data bit is set, let's request a new frame from the AP */
1102 ieee80211_send_pspoll(local, rx->sdata);
1103
1104 return RX_CONTINUE;
1105}
1106
133b8226 1107static void ap_sta_ps_start(struct sta_info *sta)
571ecf67 1108{
133b8226 1109 struct ieee80211_sub_if_data *sdata = sta->sdata;
4571d3bf 1110 struct ieee80211_local *local = sdata->local;
0795af57 1111
3e122be0 1112 atomic_inc(&sdata->bss->num_sta_ps);
af818581 1113 set_sta_flags(sta, WLAN_STA_PS_STA);
d057e5a3
AN		 1114 if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
1115 drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta);
571ecf67 1116#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
0c68ae26 1117 printk(KERN_DEBUG "%s: STA %pM aid %d enters power save mode\n",
47846c9b 1118 sdata->name, sta->sta.addr, sta->sta.aid);
571ecf67
JB		 1119#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
1120}
1121
ff9458d3 1122static void ap_sta_ps_end(struct sta_info *sta)
571ecf67 1123{
133b8226 1124 struct ieee80211_sub_if_data *sdata = sta->sdata;
571ecf67 1125
3e122be0 1126 atomic_dec(&sdata->bss->num_sta_ps);
004c872e 1127
571ecf67 1128#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
0c68ae26 1129 printk(KERN_DEBUG "%s: STA %pM aid %d exits power save mode\n",
47846c9b 1130 sdata->name, sta->sta.addr, sta->sta.aid);
571ecf67 1131#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
004c872e 1132
af818581 1133 if (test_sta_flags(sta, WLAN_STA_PS_DRIVER)) {
571ecf67 1134#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
af818581 1135 printk(KERN_DEBUG "%s: STA %pM aid %d driver-ps-blocked\n",
47846c9b 1136 sdata->name, sta->sta.addr, sta->sta.aid);
571ecf67 1137#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
af818581
JB		 1138 return;
1139 }
1140
1141 ieee80211_sta_ps_deliver_wakeup(sta);
571ecf67
JB		 1142}
1143
d057e5a3
AN		 1144int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start)
1145{
1146 struct sta_info *sta_inf = container_of(sta, struct sta_info, sta);
1147 bool in_ps;
1148
1149 WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS));
1150
1151 /* Don't let the same PS state be set twice */
1152 in_ps = test_sta_flags(sta_inf, WLAN_STA_PS_STA);
1153 if ((start && in_ps) || (!start && !in_ps))
1154 return -EINVAL;
1155
1156 if (start)
1157 ap_sta_ps_start(sta_inf);
1158 else
1159 ap_sta_ps_end(sta_inf);
1160
1161 return 0;
1162}
1163EXPORT_SYMBOL(ieee80211_sta_ps_transition);
1164
47086fc5
JB		 1165static ieee80211_rx_result debug_noinline
1166ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx)
1167{
1168 struct ieee80211_sub_if_data *sdata = rx->sdata;
1169 struct ieee80211_hdr *hdr = (void *)rx->skb->data;
1170 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
1171 int tid, ac;
1172
1173 if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH))
1174 return RX_CONTINUE;
1175
1176 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1177 sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
1178 return RX_CONTINUE;
1179
1180 /*
1181 * The device handles station powersave, so don't do anything about
1182 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1183 * it to mac80211 since they're handled.)
1184 */
1185 if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS)
1186 return RX_CONTINUE;
1187
1188 /*
1189 * Don't do anything if the station isn't already asleep. In
1190 * the uAPSD case, the station will probably be marked asleep,
1191 * in the PS-Poll case the station must be confused ...
1192 */
1193 if (!test_sta_flags(rx->sta, WLAN_STA_PS_STA))
1194 return RX_CONTINUE;
1195
1196 if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) {
1197 if (!test_sta_flags(rx->sta, WLAN_STA_PS_DRIVER))
1198 ieee80211_sta_ps_deliver_poll_response(rx->sta);
1199 else
1200 set_sta_flags(rx->sta, WLAN_STA_PSPOLL);
1201
1202 /* Free PS Poll skb here instead of returning RX_DROP that would
1203 * count as an dropped frame. */
1204 dev_kfree_skb(rx->skb);
1205
1206 return RX_QUEUED;
1207 } else if (!ieee80211_has_morefrags(hdr->frame_control) &&
1208 !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
1209 ieee80211_has_pm(hdr->frame_control) &&
1210 (ieee80211_is_data_qos(hdr->frame_control) ||
1211 ieee80211_is_qos_nullfunc(hdr->frame_control))) {
1212 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
1213 ac = ieee802_1d_to_ac[tid & 7];
1214
1215 /*
1216 * If this AC is not trigger-enabled do nothing.
1217 *
1218 * NB: This could/should check a separate bitmap of trigger-
1219 * enabled queues, but for now we only implement uAPSD w/o
1220 * TSPEC changes to the ACs, so they're always the same.
1221 */
1222 if (!(rx->sta->sta.uapsd_queues & BIT(ac)))
1223 return RX_CONTINUE;
1224
1225 /* if we are in a service period, do nothing */
1226 if (test_sta_flags(rx->sta, WLAN_STA_SP))
1227 return RX_CONTINUE;
1228
1229 if (!test_sta_flags(rx->sta, WLAN_STA_PS_DRIVER))
1230 ieee80211_sta_ps_deliver_uapsd(rx->sta);
1231 else
1232 set_sta_flags(rx->sta, WLAN_STA_UAPSD);
1233 }
1234
1235 return RX_CONTINUE;
1236}
1237
49461622 1238static ieee80211_rx_result debug_noinline
5cf121c3 1239ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
571ecf67
JB		 1240{
1241 struct sta_info *sta = rx->sta;
eb9fb5b8
JB		 1242 struct sk_buff *skb = rx->skb;
1243 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1244 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
571ecf67
JB		 1245
1246 if (!sta)
9ae54c84 1247 return RX_CONTINUE;
571ecf67 1248
b291ba11
JB		 1249 /*
1250 * Update last_rx only for IBSS packets which are for the current
1251 * BSSID to avoid keeping the current IBSS network alive in cases
1252 * where other STAs start using different BSSID.
1253 */
05c914fe 1254 if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) {
71364716 1255 u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len,
05c914fe 1256 NL80211_IFTYPE_ADHOC);
3af6334c 1257 if (compare_ether_addr(bssid, rx->sdata->u.ibss.bssid) == 0) {
571ecf67 1258 sta->last_rx = jiffies;
3af6334c
FF		 1259 if (ieee80211_is_data(hdr->frame_control)) {
1260 sta->last_rx_rate_idx = status->rate_idx;
1261 sta->last_rx_rate_flag = status->flag;
1262 }
1263 }
b291ba11
JB		 1264 } else if (!is_multicast_ether_addr(hdr->addr1)) {
1265 /*
33b64eb2
LCC		 1266 * Mesh beacons will update last_rx when if they are found to
1267 * match the current local configuration when processed.
571ecf67 1268 */
b291ba11 1269 sta->last_rx = jiffies;
3af6334c
FF		 1270 if (ieee80211_is_data(hdr->frame_control)) {
1271 sta->last_rx_rate_idx = status->rate_idx;
1272 sta->last_rx_rate_flag = status->flag;
1273 }
571ecf67
JB		 1274 }
1275
554891e6 1276 if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
9ae54c84 1277 return RX_CONTINUE;
571ecf67 1278
3cf335d5
KV		 1279 if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
1280 ieee80211_sta_rx_notify(rx->sdata, hdr);
1281
571ecf67
JB		 1282 sta->rx_fragments++;
1283 sta->rx_bytes += rx->skb->len;
eb9fb5b8 1284 sta->last_signal = status->signal;
541a45a1 1285 ewma_add(&sta->avg_signal, -status->signal);
571ecf67 1286
72eaa43a
JB		 1287 /*
1288 * Change STA power saving mode only at the end of a frame
1289 * exchange sequence.
1290 */
d057e5a3
AN		 1291 if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) &&
1292 !ieee80211_has_morefrags(hdr->frame_control) &&
4cfda47b 1293 !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
05c914fe
JB		 1294 (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
1295 rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) {
af818581 1296 if (test_sta_flags(sta, WLAN_STA_PS_STA)) {
72eaa43a
JB		 1297 /*
1298 * Ignore doze->wake transitions that are
1299 * indicated by non-data frames, the standard
1300 * is unclear here, but for example going to
1301 * PS mode and then scanning would cause a
1302 * doze->wake transition for the probe request,
1303 * and that is clearly undesirable.
1304 */
1305 if (ieee80211_is_data(hdr->frame_control) &&
1306 !ieee80211_has_pm(hdr->frame_control))
ff9458d3 1307 ap_sta_ps_end(sta);
72eaa43a
JB		 1308 } else {
1309 if (ieee80211_has_pm(hdr->frame_control))
1310 ap_sta_ps_start(sta);
1311 }
571ecf67
JB		 1312 }
1313
22403def
JB		 1314 /*
1315 * Drop (qos-)data::nullfunc frames silently, since they
1316 * are used only to control station power saving mode.
1317 */
1318 if (ieee80211_is_nullfunc(hdr->frame_control) ||
1319 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
571ecf67 1320 I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
d524215f
FF		 1321
1322 /*
1323 * If we receive a 4-addr nullfunc frame from a STA
1324 * that was not moved to a 4-addr STA vlan yet, drop
1325 * the frame to the monitor interface, to make sure
1326 * that hostapd sees it
1327 */
1328 if (ieee80211_has_a4(hdr->frame_control) &&
1329 (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
1330 (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1331 !rx->sdata->u.vlan.sta)))
1332 return RX_DROP_MONITOR;
22403def
JB		 1333 /*
1334 * Update counter and free packet here to avoid
1335 * counting this as a dropped packed.
1336 */
571ecf67
JB		 1337 sta->rx_packets++;
1338 dev_kfree_skb(rx->skb);
9ae54c84 1339 return RX_QUEUED;
571ecf67
JB		 1340 }
1341
9ae54c84 1342 return RX_CONTINUE;
571ecf67
JB		 1343} /* ieee80211_rx_h_sta_process */
1344
571ecf67
JB		 1345static inline struct ieee80211_fragment_entry *
1346ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
1347 unsigned int frag, unsigned int seq, int rx_queue,
1348 struct sk_buff **skb)
1349{
1350 struct ieee80211_fragment_entry *entry;
1351 int idx;
1352
1353 idx = sdata->fragment_next;
1354 entry = &sdata->fragments[sdata->fragment_next++];
1355 if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
1356 sdata->fragment_next = 0;
1357
1358 if (!skb_queue_empty(&entry->skb_list)) {
f4ea83dd 1359#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
571ecf67
JB		 1360 struct ieee80211_hdr *hdr =
1361 (struct ieee80211_hdr *) entry->skb_list.next->data;
1362 printk(KERN_DEBUG "%s: RX reassembly removed oldest "
1363 "fragment entry (idx=%d age=%lu seq=%d last_frag=%d "
0c68ae26 1364 "addr1=%pM addr2=%pM\n",
47846c9b 1365 sdata->name, idx,
571ecf67 1366 jiffies - entry->first_frag_time, entry->seq,
0c68ae26 1367 entry->last_frag, hdr->addr1, hdr->addr2);
f4ea83dd 1368#endif
571ecf67
JB		 1369 __skb_queue_purge(&entry->skb_list);
1370 }
1371
1372 __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
1373 *skb = NULL;
1374 entry->first_frag_time = jiffies;
1375 entry->seq = seq;
1376 entry->rx_queue = rx_queue;
1377 entry->last_frag = frag;
1378 entry->ccmp = 0;
1379 entry->extra_len = 0;
1380
1381 return entry;
1382}
1383
1384static inline struct ieee80211_fragment_entry *
1385ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
b73d70ad 1386 unsigned int frag, unsigned int seq,
571ecf67
JB		 1387 int rx_queue, struct ieee80211_hdr *hdr)
1388{
1389 struct ieee80211_fragment_entry *entry;
1390 int i, idx;
1391
1392 idx = sdata->fragment_next;
1393 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
1394 struct ieee80211_hdr *f_hdr;
571ecf67
JB		 1395
1396 idx--;
1397 if (idx < 0)
1398 idx = IEEE80211_FRAGMENT_MAX - 1;
1399
1400 entry = &sdata->fragments[idx];
1401 if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
1402 entry->rx_queue != rx_queue ||
1403 entry->last_frag + 1 != frag)
1404 continue;
1405
b73d70ad 1406 f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data;
571ecf67 1407
b73d70ad
HH		 1408 /*
1409 * Check ftype and addresses are equal, else check next fragment
1410 */
1411 if (((hdr->frame_control ^ f_hdr->frame_control) &
1412 cpu_to_le16(IEEE80211_FCTL_FTYPE)) ||
571ecf67
JB		 1413 compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 ||
1414 compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0)
1415 continue;
1416
ab46623e 1417 if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
571ecf67
JB		 1418 __skb_queue_purge(&entry->skb_list);
1419 continue;
1420 }
1421 return entry;
1422 }
1423
1424 return NULL;
1425}
1426
49461622 1427static ieee80211_rx_result debug_noinline
5cf121c3 1428ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
571ecf67
JB		 1429{
1430 struct ieee80211_hdr *hdr;
1431 u16 sc;
358c8d9d 1432 __le16 fc;
571ecf67
JB		 1433 unsigned int frag, seq;
1434 struct ieee80211_fragment_entry *entry;
1435 struct sk_buff *skb;
554891e6 1436 struct ieee80211_rx_status *status;
571ecf67 1437
b73d70ad 1438 hdr = (struct ieee80211_hdr *)rx->skb->data;
358c8d9d 1439 fc = hdr->frame_control;
571ecf67
JB		 1440 sc = le16_to_cpu(hdr->seq_ctrl);
1441 frag = sc & IEEE80211_SCTL_FRAG;
1442
358c8d9d 1443 if (likely((!ieee80211_has_morefrags(fc) && frag == 0) ||
571ecf67
JB		 1444 (rx->skb)->len < 24 ||
1445 is_multicast_ether_addr(hdr->addr1))) {
1446 /* not fragmented */
1447 goto out;
1448 }
1449 I802_DEBUG_INC(rx->local->rx_handlers_fragments);
1450
e3cf8b3f
ZY		 1451 if (skb_linearize(rx->skb))
1452 return RX_DROP_UNUSABLE;
1453
058897a4
AK		 1454 /*
1455 * skb_linearize() might change the skb->data and
1456 * previously cached variables (in this case, hdr) need to
1457 * be refreshed with the new data.
1458 */
1459 hdr = (struct ieee80211_hdr *)rx->skb->data;
571ecf67
JB		 1460 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
1461
1462 if (frag == 0) {
1463 /* This is the first fragment of a new frame. */
1464 entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
9e26297a 1465 rx->seqno_idx, &(rx->skb));
97359d12 1466 if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP &&
358c8d9d 1467 ieee80211_has_protected(fc)) {
9e26297a 1468 int queue = rx->security_idx;
571ecf67
JB		 1469 /* Store CCMP PN so that we can verify that the next
1470 * fragment has a sequential PN value. */
1471 entry->ccmp = 1;
1472 memcpy(entry->last_pn,
9190252c 1473 rx->key->u.ccmp.rx_pn[queue],
571ecf67
JB		 1474 CCMP_PN_LEN);
1475 }
9ae54c84 1476 return RX_QUEUED;
571ecf67
JB		 1477 }
1478
1479 /* This is a fragment for a frame that should already be pending in
1480 * fragment cache. Add this fragment to the end of the pending entry.
1481 */
9e26297a
JB		 1482 entry = ieee80211_reassemble_find(rx->sdata, frag, seq,
1483 rx->seqno_idx, hdr);
571ecf67
JB		 1484 if (!entry) {
1485 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
e4c26add 1486 return RX_DROP_MONITOR;
571ecf67
JB		 1487 }
1488
1489 /* Verify that MPDUs within one MSDU have sequential PN values.
1490 * (IEEE 802.11i, 8.3.3.4.5) */
1491 if (entry->ccmp) {
1492 int i;
1493 u8 pn[CCMP_PN_LEN], *rpn;
9190252c 1494 int queue;
97359d12 1495 if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP)
e4c26add 1496 return RX_DROP_UNUSABLE;
571ecf67
JB		 1497 memcpy(pn, entry->last_pn, CCMP_PN_LEN);
1498 for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
1499 pn[i]++;
1500 if (pn[i])
1501 break;
1502 }
9e26297a 1503 queue = rx->security_idx;
9190252c 1504 rpn = rx->key->u.ccmp.rx_pn[queue];
f4ea83dd 1505 if (memcmp(pn, rpn, CCMP_PN_LEN))
e4c26add 1506 return RX_DROP_UNUSABLE;
571ecf67
JB		 1507 memcpy(entry->last_pn, pn, CCMP_PN_LEN);
1508 }
1509
358c8d9d 1510 skb_pull(rx->skb, ieee80211_hdrlen(fc));
571ecf67
JB		 1511 __skb_queue_tail(&entry->skb_list, rx->skb);
1512 entry->last_frag = frag;
1513 entry->extra_len += rx->skb->len;
358c8d9d 1514 if (ieee80211_has_morefrags(fc)) {
571ecf67 1515 rx->skb = NULL;
9ae54c84 1516 return RX_QUEUED;
571ecf67
JB		 1517 }
1518
1519 rx->skb = __skb_dequeue(&entry->skb_list);
1520 if (skb_tailroom(rx->skb) < entry->extra_len) {
1521 I802_DEBUG_INC(rx->local->rx_expand_skb_head2);
1522 if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
1523 GFP_ATOMIC))) {
1524 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
1525 __skb_queue_purge(&entry->skb_list);
e4c26add 1526 return RX_DROP_UNUSABLE;
571ecf67
JB		 1527 }
1528 }
1529 while ((skb = __skb_dequeue(&entry->skb_list))) {
1530 memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len);
1531 dev_kfree_skb(skb);
1532 }
1533
1534 /* Complete frame has been reassembled - process it now */
554891e6
JB		 1535 status = IEEE80211_SKB_RXCB(rx->skb);
1536 status->rx_flags |= IEEE80211_RX_FRAGMENTED;
571ecf67
JB		 1537
1538 out:
1539 if (rx->sta)
1540 rx->sta->rx_packets++;
1541 if (is_multicast_ether_addr(hdr->addr1))
1542 rx->local->dot11MulticastReceivedFrameCount++;
1543 else
1544 ieee80211_led_rx(rx->local);
9ae54c84 1545 return RX_CONTINUE;
571ecf67
JB		 1546}
1547
49461622 1548static ieee80211_rx_result debug_noinline
5cf121c3 1549ieee80211_rx_h_remove_qos_control(struct ieee80211_rx_data *rx)
6e0d114d 1550{
6e0d114d 1551 u8 *data = rx->skb->data;
238f74a2 1552 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)data;
6e0d114d 1553
238f74a2 1554 if (!ieee80211_is_data_qos(hdr->frame_control))
9ae54c84 1555 return RX_CONTINUE;
6e0d114d
JB		 1556
1557 /* remove the qos control field, update frame type and meta-data */
238f74a2
HH		 1558 memmove(data + IEEE80211_QOS_CTL_LEN, data,
1559 ieee80211_hdrlen(hdr->frame_control) - IEEE80211_QOS_CTL_LEN);
1560 hdr = (struct ieee80211_hdr *)skb_pull(rx->skb, IEEE80211_QOS_CTL_LEN);
6e0d114d 1561 /* change frame type to non QOS */
238f74a2 1562 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
6e0d114d 1563
9ae54c84 1564 return RX_CONTINUE;
6e0d114d
JB		 1565}
1566
76ee65bf 1567static int
5cf121c3 1568ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
571ecf67 1569{
07346f81 1570 if (unlikely(!rx->sta ||
f4ea83dd 1571 !test_sta_flags(rx->sta, WLAN_STA_AUTHORIZED)))
76ee65bf 1572 return -EACCES;
571ecf67 1573
76ee65bf 1574 return 0;
571ecf67
JB		 1575}
1576
76ee65bf 1577static int
358c8d9d 1578ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
571ecf67 1579{
eb9fb5b8
JB		 1580 struct sk_buff *skb = rx->skb;
1581 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1582
3017b80b 1583 /*
7848ba7d
JB		 1584 * Pass through unencrypted frames if the hardware has
1585 * decrypted them already.
3017b80b 1586 */
eb9fb5b8 1587 if (status->flag & RX_FLAG_DECRYPTED)
76ee65bf 1588 return 0;
571ecf67
JB		 1589
1590 /* Drop unencrypted frames if key is set. */
358c8d9d
HH		 1591 if (unlikely(!ieee80211_has_protected(fc) &&
1592 !ieee80211_is_nullfunc(fc) &&
f2ca3ea4 1593 ieee80211_is_data(fc) &&
b3fc9c6c 1594 (rx->key || rx->sdata->drop_unencrypted)))
76ee65bf 1595 return -EACCES;
bef5d1c7
JB		 1596
1597 return 0;
1598}
1599
1600static int
1601ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
1602{
1603 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
e3efca0a 1604 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
bef5d1c7 1605 __le16 fc = hdr->frame_control;
bef5d1c7 1606
e3efca0a
JM		 1607 /*
1608 * Pass through unencrypted frames if the hardware has
1609 * decrypted them already.
1610 */
1611 if (status->flag & RX_FLAG_DECRYPTED)
1612 return 0;
bef5d1c7 1613
f2ca3ea4 1614 if (rx->sta && test_sta_flags(rx->sta, WLAN_STA_MFP)) {
d211e90e
JM		 1615 if (unlikely(!ieee80211_has_protected(fc) &&
1616 ieee80211_is_unicast_robust_mgmt_frame(rx->skb) &&
cf4e594e
JM		 1617 rx->key)) {
1618 if (ieee80211_is_deauth(fc))
1619 cfg80211_send_unprot_deauth(rx->sdata->dev,
1620 rx->skb->data,
1621 rx->skb->len);
1622 else if (ieee80211_is_disassoc(fc))
1623 cfg80211_send_unprot_disassoc(rx->sdata->dev,
1624 rx->skb->data,
1625 rx->skb->len);
f2ca3ea4 1626 return -EACCES;
cf4e594e 1627 }
f2ca3ea4 1628 /* BIP does not use Protected field, so need to check MMIE */
f64f9e71 1629 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) &&
cf4e594e
JM		 1630 ieee80211_get_mmie_keyidx(rx->skb) < 0)) {
1631 if (ieee80211_is_deauth(fc))
1632 cfg80211_send_unprot_deauth(rx->sdata->dev,
1633 rx->skb->data,
1634 rx->skb->len);
1635 else if (ieee80211_is_disassoc(fc))
1636 cfg80211_send_unprot_disassoc(rx->sdata->dev,
1637 rx->skb->data,
1638 rx->skb->len);
f2ca3ea4 1639 return -EACCES;
cf4e594e 1640 }
f2ca3ea4
JM		 1641 /*
1642 * When using MFP, Action frames are not allowed prior to
1643 * having configured keys.
1644 */
1645 if (unlikely(ieee80211_is_action(fc) && !rx->key &&
1646 ieee80211_is_robust_mgmt_frame(
1647 (struct ieee80211_hdr *) rx->skb->data)))
1648 return -EACCES;
1649 }
b3fc9c6c 1650
76ee65bf 1651 return 0;
571ecf67
JB		 1652}
1653
76ee65bf 1654static int
4114fa21 1655__ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)
571ecf67 1656{
eb9fb5b8 1657 struct ieee80211_sub_if_data *sdata = rx->sdata;
f14543ee 1658 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
fbb327c5
FF		 1659 bool check_port_control = false;
1660 struct ethhdr *ehdr;
1661 int ret;
f14543ee 1662
4114fa21 1663 *port_control = false;
9bc383de
JB		 1664 if (ieee80211_has_a4(hdr->frame_control) &&
1665 sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
f14543ee 1666 return -1;
9bc383de 1667
fbb327c5
FF		 1668 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1669 !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) {
1670
1671 if (!sdata->u.mgd.use_4addr)
1672 return -1;
1673 else
1674 check_port_control = true;
1675 }
1676
9bc383de 1677 if (is_multicast_ether_addr(hdr->addr1) &&
fbb327c5 1678 sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta)
f14543ee 1679 return -1;
571ecf67 1680
fbb327c5 1681 ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
4114fa21 1682 if (ret < 0)
fbb327c5
FF		 1683 return ret;
1684
1685 ehdr = (struct ethhdr *) rx->skb->data;
4114fa21
FF		 1686 if (ehdr->h_proto == rx->sdata->control_port_protocol)
1687 *port_control = true;
1688 else if (check_port_control)
fbb327c5
FF		 1689 return -1;
1690
1691 return 0;
76ee65bf 1692}
571ecf67 1693
ce3edf6d
JB		 1694/*
1695 * requires that rx->skb is a frame with ethernet header
1696 */
358c8d9d 1697static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
ce3edf6d 1698{
c97c23e3 1699 static const u8 pae_group_addr[ETH_ALEN] __aligned(2)
ce3edf6d
JB		 1700 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
1701 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
1702
1703 /*
1704 * Allow EAPOL frames to us/the PAE group address regardless
1705 * of whether the frame was encrypted or not.
1706 */
a621fa4d 1707 if (ehdr->h_proto == rx->sdata->control_port_protocol &&
47846c9b 1708 (compare_ether_addr(ehdr->h_dest, rx->sdata->vif.addr) == 0 ||
ce3edf6d
JB		 1709 compare_ether_addr(ehdr->h_dest, pae_group_addr) == 0))
1710 return true;
1711
1712 if (ieee80211_802_1x_port_control(rx) ||
358c8d9d 1713 ieee80211_drop_unencrypted(rx, fc))
ce3edf6d
JB		 1714 return false;
1715
1716 return true;
1717}
1718
1719/*
1720 * requires that rx->skb is a frame with ethernet header
1721 */
76ee65bf 1722static void
5cf121c3 1723ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
76ee65bf 1724{
eb9fb5b8
JB		 1725 struct ieee80211_sub_if_data *sdata = rx->sdata;
1726 struct net_device *dev = sdata->dev;
76ee65bf 1727 struct sk_buff *skb, *xmit_skb;
ce3edf6d
JB		 1728 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
1729 struct sta_info *dsta;
554891e6 1730 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
571ecf67 1731
76ee65bf
RR		 1732 skb = rx->skb;
1733 xmit_skb = NULL;
571ecf67 1734
05c914fe
JB		 1735 if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1736 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
213cd118 1737 !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
554891e6 1738 (status->rx_flags & IEEE80211_RX_RA_MATCH) &&
9bc383de 1739 (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) {
ce3edf6d
JB		 1740 if (is_multicast_ether_addr(ehdr->h_dest)) {
1741 /*
1742 * send multicast frames both to higher layers in
1743 * local net stack and back to the wireless medium
1744 */
76ee65bf
RR		 1745 xmit_skb = skb_copy(skb, GFP_ATOMIC);
1746 if (!xmit_skb && net_ratelimit())
571ecf67
JB		 1747 printk(KERN_DEBUG "%s: failed to clone "
1748 "multicast frame\n", dev->name);
1749 } else {
abe60632
JB		 1750 dsta = sta_info_get(sdata, skb->data);
1751 if (dsta) {
ce3edf6d
JB		 1752 /*
1753 * The destination station is associated to
1754 * this AP (in this VLAN), so send the frame
1755 * directly to it and do not pass it to local
1756 * net stack.
571ecf67 1757 */
76ee65bf 1758 xmit_skb = skb;
571ecf67
JB		 1759 skb = NULL;
1760 }
571ecf67
JB		 1761 }
1762 }
1763
1764 if (skb) {
d1c3a37c
JB		 1765 int align __maybe_unused;
1766
59d9cb07 1767#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
d1c3a37c
JB		 1768 /*
1769 * 'align' will only take the values 0 or 2 here
1770 * since all frames are required to be aligned
1771 * to 2-byte boundaries when being passed to
1772 * mac80211. That also explains the __skb_push()
1773 * below.
1774 */
dacb6f1d 1775 align = ((unsigned long)(skb->data + sizeof(struct ethhdr))) & 3;
d1c3a37c
JB		 1776 if (align) {
1777 if (WARN_ON(skb_headroom(skb) < 3)) {
1778 dev_kfree_skb(skb);
1779 skb = NULL;
1780 } else {
1781 u8 *data = skb->data;
8ce0b589
ZY		 1782 size_t len = skb_headlen(skb);
1783 skb->data -= align;
1784 memmove(skb->data, data, len);
1785 skb_set_tail_pointer(skb, len);
d1c3a37c
JB		 1786 }
1787 }
1788#endif
1789
1790 if (skb) {
1791 /* deliver to local stack */
1792 skb->protocol = eth_type_trans(skb, dev);
1793 memset(skb->cb, 0, sizeof(skb->cb));
5548a8a1 1794 netif_receive_skb(skb);
d1c3a37c 1795 }
571ecf67
JB		 1796 }
1797
76ee65bf 1798 if (xmit_skb) {
571ecf67 1799 /* send to wireless media */
f831e909 1800 xmit_skb->protocol = htons(ETH_P_802_3);
ce3edf6d
JB		 1801 skb_reset_network_header(xmit_skb);
1802 skb_reset_mac_header(xmit_skb);
76ee65bf 1803 dev_queue_xmit(xmit_skb);
571ecf67 1804 }
76ee65bf
RR		 1805}
1806
49461622 1807static ieee80211_rx_result debug_noinline
5cf121c3 1808ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
fd4c7f2f 1809{
eb9fb5b8 1810 struct net_device *dev = rx->sdata->dev;
eaf85ca7 1811 struct sk_buff *skb = rx->skb;
358c8d9d
HH		 1812 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1813 __le16 fc = hdr->frame_control;
eaf85ca7 1814 struct sk_buff_head frame_list;
554891e6 1815 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
fd4c7f2f 1816
358c8d9d 1817 if (unlikely(!ieee80211_is_data(fc)))
9ae54c84 1818 return RX_CONTINUE;
fd4c7f2f 1819
358c8d9d 1820 if (unlikely(!ieee80211_is_data_present(fc)))
e4c26add 1821 return RX_DROP_MONITOR;
fd4c7f2f 1822
554891e6 1823 if (!(status->rx_flags & IEEE80211_RX_AMSDU))
9ae54c84 1824 return RX_CONTINUE;
fd4c7f2f 1825
eaf85ca7
ZY		 1826 if (ieee80211_has_a4(hdr->frame_control) &&
1827 rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1828 !rx->sdata->u.vlan.sta)
e4c26add 1829 return RX_DROP_UNUSABLE;
fd4c7f2f 1830
eaf85ca7
ZY		 1831 if (is_multicast_ether_addr(hdr->addr1) &&
1832 ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1833 rx->sdata->u.vlan.sta) ||
1834 (rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
1835 rx->sdata->u.mgd.use_4addr)))
e4c26add 1836 return RX_DROP_UNUSABLE;
fd4c7f2f 1837
eaf85ca7
ZY		 1838 skb->dev = dev;
1839 __skb_queue_head_init(&frame_list);
fd4c7f2f 1840
e3cf8b3f
ZY		 1841 if (skb_linearize(skb))
1842 return RX_DROP_UNUSABLE;
1843
eaf85ca7
ZY		 1844 ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr,
1845 rx->sdata->vif.type,
8b3becad 1846 rx->local->hw.extra_tx_headroom, true);
fd4c7f2f 1847
eaf85ca7
ZY		 1848 while (!skb_queue_empty(&frame_list)) {
1849 rx->skb = __skb_dequeue(&frame_list);
fd4c7f2f 1850
358c8d9d 1851 if (!ieee80211_frame_allowed(rx, fc)) {
eaf85ca7 1852 dev_kfree_skb(rx->skb);
ce3edf6d
JB		 1853 continue;
1854 }
eaf85ca7
ZY		 1855 dev->stats.rx_packets++;
1856 dev->stats.rx_bytes += rx->skb->len;
fd4c7f2f
RR		 1857
1858 ieee80211_deliver_skb(rx);
1859 }
1860
9ae54c84 1861 return RX_QUEUED;
fd4c7f2f
RR		 1862}
1863
bf94e17b 1864#ifdef CONFIG_MAC80211_MESH
b0dee578 1865static ieee80211_rx_result
e32f85f7
LCC		 1866ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
1867{
1868 struct ieee80211_hdr *hdr;
1869 struct ieee80211s_hdr *mesh_hdr;
1870 unsigned int hdrlen;
1871 struct sk_buff *skb = rx->skb, *fwd_skb;
3b8d81e0 1872 struct ieee80211_local *local = rx->local;
eb9fb5b8 1873 struct ieee80211_sub_if_data *sdata = rx->sdata;
554891e6 1874 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
e32f85f7
LCC		 1875
1876 hdr = (struct ieee80211_hdr *) skb->data;
1877 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1878 mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
1879
2157fdd6
TP		 1880 /* frame is in RMC, don't forward */
1881 if (ieee80211_is_data(hdr->frame_control) &&
1882 is_multicast_ether_addr(hdr->addr1) &&
1883 mesh_rmc_check(hdr->addr3, mesh_hdr, rx->sdata))
1884 return RX_DROP_MONITOR;
1885
e32f85f7
LCC		 1886 if (!ieee80211_is_data(hdr->frame_control))
1887 return RX_CONTINUE;
1888
1889 if (!mesh_hdr->ttl)
1890 /* illegal frame */
1891 return RX_DROP_MONITOR;
1892
cfee66b0
JC		 1893 if (ieee80211_queue_stopped(&local->hw, skb_get_queue_mapping(skb))) {
1894 IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
1895 dropped_frames_congestion);
1896 return RX_DROP_MONITOR;
1897 }
1898
43b7b314 1899 if (mesh_hdr->flags & MESH_FLAGS_AE) {
79617dee 1900 struct mesh_path *mppath;
43b7b314
JC		 1901 char *proxied_addr;
1902 char *mpp_addr;
1903
1904 if (is_multicast_ether_addr(hdr->addr1)) {
1905 mpp_addr = hdr->addr3;
1906 proxied_addr = mesh_hdr->eaddr1;
1907 } else {
1908 mpp_addr = hdr->addr4;
1909 proxied_addr = mesh_hdr->eaddr2;
1910 }
79617dee 1911
79617dee 1912 rcu_read_lock();
43b7b314 1913 mppath = mpp_path_lookup(proxied_addr, sdata);
79617dee 1914 if (!mppath) {
43b7b314 1915 mpp_path_add(proxied_addr, mpp_addr, sdata);
79617dee
Y		 1916 } else {
1917 spin_lock_bh(&mppath->state_lock);
43b7b314
JC		 1918 if (compare_ether_addr(mppath->mpp, mpp_addr) != 0)
1919 memcpy(mppath->mpp, mpp_addr, ETH_ALEN);
79617dee
Y		 1920 spin_unlock_bh(&mppath->state_lock);
1921 }
1922 rcu_read_unlock();
1923 }
1924
3c5772a5
JC		 1925 /* Frame has reached destination. Don't forward */
1926 if (!is_multicast_ether_addr(hdr->addr1) &&
47846c9b 1927 compare_ether_addr(sdata->vif.addr, hdr->addr3) == 0)
e32f85f7
LCC		 1928 return RX_CONTINUE;
1929
1930 mesh_hdr->ttl--;
1931
554891e6 1932 if (status->rx_flags & IEEE80211_RX_RA_MATCH) {
e32f85f7 1933 if (!mesh_hdr->ttl)
472dbc45 1934 IEEE80211_IFSTA_MESH_CTR_INC(&rx->sdata->u.mesh,
e32f85f7
LCC		 1935 dropped_frames_ttl);
1936 else {
1937 struct ieee80211_hdr *fwd_hdr;
3b8d81e0
JB		 1938 struct ieee80211_tx_info *info;
1939
e32f85f7
LCC		 1940 fwd_skb = skb_copy(skb, GFP_ATOMIC);
1941
1942 if (!fwd_skb && net_ratelimit())
1943 printk(KERN_DEBUG "%s: failed to clone mesh frame\n",
47846c9b 1944 sdata->name);
919bbad5 1945 if (!fwd_skb)
b51aff05 1946 goto out;
e32f85f7
LCC		 1947
1948 fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
47846c9b 1949 memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
3b8d81e0
JB		 1950 info = IEEE80211_SKB_CB(fwd_skb);
1951 memset(info, 0, sizeof(*info));
1952 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
5061b0c2 1953 info->control.vif = &rx->sdata->vif;
4777be41 1954 if (is_multicast_ether_addr(fwd_hdr->addr1)) {
c8a61a7d
DW		 1955 IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
1956 fwded_mcast);
4777be41
JC		 1957 skb_set_queue_mapping(fwd_skb,
1958 ieee80211_select_queue(sdata, fwd_skb));
2154c81c 1959 ieee80211_set_qos_hdr(sdata, fwd_skb);
4777be41 1960 } else {
3c5772a5
JC		 1961 int err;
1962 /*
1963 * Save TA to addr1 to send TA a path error if a
1964 * suitable next hop is not found
1965 */
1966 memcpy(fwd_hdr->addr1, fwd_hdr->addr2,
249b405c 1967 ETH_ALEN);
3c5772a5 1968 err = mesh_nexthop_lookup(fwd_skb, sdata);
249b405c
JC		 1969 /* Failed to immediately resolve next hop:
1970 * fwded frame was dropped or will be added
1971 * later to the pending skb queue. */
1972 if (err)
1973 return RX_DROP_MONITOR;
c8a61a7d
DW		 1974
1975 IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
1976 fwded_unicast);
249b405c
JC		 1977 }
1978 IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
1979 fwded_frames);
3b8d81e0 1980 ieee80211_add_pending_skb(local, fwd_skb);
e32f85f7
LCC		 1981 }
1982 }
1983
b51aff05 1984 out:
3c5772a5 1985 if (is_multicast_ether_addr(hdr->addr1) ||
eb9fb5b8 1986 sdata->dev->flags & IFF_PROMISC)
e32f85f7
LCC		 1987 return RX_CONTINUE;
1988 else
1989 return RX_DROP_MONITOR;
1990}
bf94e17b 1991#endif
e32f85f7 1992
49461622 1993static ieee80211_rx_result debug_noinline
5cf121c3 1994ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
76ee65bf 1995{
eb9fb5b8 1996 struct ieee80211_sub_if_data *sdata = rx->sdata;
e15276a4 1997 struct ieee80211_local *local = rx->local;
eb9fb5b8 1998 struct net_device *dev = sdata->dev;
358c8d9d
HH		 1999 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
2000 __le16 fc = hdr->frame_control;
4114fa21 2001 bool port_control;
ce3edf6d 2002 int err;
76ee65bf 2003
358c8d9d 2004 if (unlikely(!ieee80211_is_data(hdr->frame_control)))
9ae54c84 2005 return RX_CONTINUE;
76ee65bf 2006
358c8d9d 2007 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
e4c26add 2008 return RX_DROP_MONITOR;
76ee65bf 2009
f14543ee
FF		 2010 /*
2011 * Allow the cooked monitor interface of an AP to see 4-addr frames so
2012 * that a 4-addr station can be detected and moved into a separate VLAN
2013 */
2014 if (ieee80211_has_a4(hdr->frame_control) &&
2015 sdata->vif.type == NL80211_IFTYPE_AP)
2016 return RX_DROP_MONITOR;
2017
4114fa21 2018 err = __ieee80211_data_to_8023(rx, &port_control);
76ee65bf 2019 if (unlikely(err))
e4c26add 2020 return RX_DROP_UNUSABLE;
76ee65bf 2021
358c8d9d 2022 if (!ieee80211_frame_allowed(rx, fc))
e4c26add 2023 return RX_DROP_MONITOR;
ce3edf6d 2024
4114fa21
FF		 2025 if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
2026 unlikely(port_control) && sdata->bss) {
2027 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2028 u.ap);
2029 dev = sdata->dev;
2030 rx->sdata = sdata;
2031 }
2032
76ee65bf
RR		 2033 rx->skb->dev = dev;
2034
2035 dev->stats.rx_packets++;
2036 dev->stats.rx_bytes += rx->skb->len;
2037
08ca944e 2038 if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 &&
8c99f691
RM		 2039 !is_multicast_ether_addr(
2040 ((struct ethhdr *)rx->skb->data)->h_dest) &&
2041 (!local->scanning &&
2042 !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) {
e15276a4
VN		 2043 mod_timer(&local->dynamic_ps_timer, jiffies +
2044 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
2045 }
2046
76ee65bf 2047 ieee80211_deliver_skb(rx);
571ecf67 2048
9ae54c84 2049 return RX_QUEUED;
571ecf67
JB		 2050}
2051
49461622 2052static ieee80211_rx_result debug_noinline
24a8fdad 2053ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
71364716
RR		 2054{
2055 struct ieee80211_local *local = rx->local;
2056 struct ieee80211_hw *hw = &local->hw;
2057 struct sk_buff *skb = rx->skb;
a7767f95 2058 struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data;
71364716
RR		 2059 struct tid_ampdu_rx *tid_agg_rx;
2060 u16 start_seq_num;
2061 u16 tid;
2062
a7767f95 2063 if (likely(!ieee80211_is_ctl(bar->frame_control)))
9ae54c84 2064 return RX_CONTINUE;
71364716 2065
a7767f95 2066 if (ieee80211_is_back_req(bar->frame_control)) {
8ae5977f
JB		 2067 struct {
2068 __le16 control, start_seq_num;
2069 } __packed bar_data;
2070
71364716 2071 if (!rx->sta)
a02ae758 2072 return RX_DROP_MONITOR;
8ae5977f
JB		 2073
2074 if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control),
2075 &bar_data, sizeof(bar_data)))
2076 return RX_DROP_MONITOR;
2077
8ae5977f 2078 tid = le16_to_cpu(bar_data.control) >> 12;
a87f736d
JB		 2079
2080 tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]);
2081 if (!tid_agg_rx)
a02ae758 2082 return RX_DROP_MONITOR;
71364716 2083
8ae5977f 2084 start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4;
71364716
RR		 2085
2086 /* reset session timer */
20ad19d0
JB		 2087 if (tid_agg_rx->timeout)
2088 mod_timer(&tid_agg_rx->session_timer,
2089 TU_TO_EXP_TIME(tid_agg_rx->timeout));
71364716 2090
dd318575 2091 spin_lock(&tid_agg_rx->reorder_lock);
a02ae758 2092 /* release stored frames up to start of BAR */
24a8fdad 2093 ieee80211_release_reorder_frames(hw, tid_agg_rx, start_seq_num);
dd318575
JB		 2094 spin_unlock(&tid_agg_rx->reorder_lock);
2095
a02ae758
JB		 2096 kfree_skb(skb);
2097 return RX_QUEUED;
71364716
RR		 2098 }
2099
08daecae
JB		 2100 /*
2101 * After this point, we only want management frames,
2102 * so we can drop all remaining control frames to
2103 * cooked monitor interfaces.
2104 */
2105 return RX_DROP_MONITOR;
71364716
RR		 2106}
2107
f4f727a6
JM		 2108static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata,
2109 struct ieee80211_mgmt *mgmt,
2110 size_t len)
fea14732
JM		 2111{
2112 struct ieee80211_local *local = sdata->local;
2113 struct sk_buff *skb;
2114 struct ieee80211_mgmt *resp;
2115
47846c9b 2116 if (compare_ether_addr(mgmt->da, sdata->vif.addr) != 0) {
fea14732
JM		 2117 /* Not to own unicast address */
2118 return;
2119 }
2120
46900298
JB		 2121 if (compare_ether_addr(mgmt->sa, sdata->u.mgd.bssid) != 0 ||
2122 compare_ether_addr(mgmt->bssid, sdata->u.mgd.bssid) != 0) {
77fdaa12 2123 /* Not from the current AP or not associated yet. */
fea14732
JM		 2124 return;
2125 }
2126
2127 if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) {
2128 /* Too short SA Query request frame */
2129 return;
2130 }
2131
2132 skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom);
2133 if (skb == NULL)
2134 return;
2135
2136 skb_reserve(skb, local->hw.extra_tx_headroom);
2137 resp = (struct ieee80211_mgmt *) skb_put(skb, 24);
2138 memset(resp, 0, 24);
2139 memcpy(resp->da, mgmt->sa, ETH_ALEN);
47846c9b 2140 memcpy(resp->sa, sdata->vif.addr, ETH_ALEN);
46900298 2141 memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN);
fea14732
JM		 2142 resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2143 IEEE80211_STYPE_ACTION);
2144 skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query));
2145 resp->u.action.category = WLAN_CATEGORY_SA_QUERY;
2146 resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE;
2147 memcpy(resp->u.action.u.sa_query.trans_id,
2148 mgmt->u.action.u.sa_query.trans_id,
2149 WLAN_SA_QUERY_TR_ID_LEN);
2150
62ae67be 2151 ieee80211_tx_skb(sdata, skb);
fea14732
JM		 2152}
2153
2e161f78
JB		 2154static ieee80211_rx_result debug_noinline
2155ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx)
2156{
2157 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
554891e6 2158 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
2e161f78
JB		 2159
2160 /*
2161 * From here on, look only at management frames.
2162 * Data and control frames are already handled,
2163 * and unknown (reserved) frames are useless.
2164 */
2165 if (rx->skb->len < 24)
2166 return RX_DROP_MONITOR;
2167
2168 if (!ieee80211_is_mgmt(mgmt->frame_control))
2169 return RX_DROP_MONITOR;
2170
554891e6 2171 if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
2e161f78
JB		 2172 return RX_DROP_MONITOR;
2173
2174 if (ieee80211_drop_unencrypted_mgmt(rx))
2175 return RX_DROP_UNUSABLE;
2176
2177 return RX_CONTINUE;
2178}
2179
de1ede7a
JB		 2180static ieee80211_rx_result debug_noinline
2181ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
2182{
2183 struct ieee80211_local *local = rx->local;
eb9fb5b8 2184 struct ieee80211_sub_if_data *sdata = rx->sdata;
de1ede7a 2185 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
554891e6 2186 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
de1ede7a
JB		 2187 int len = rx->skb->len;
2188
2189 if (!ieee80211_is_action(mgmt->frame_control))
2190 return RX_CONTINUE;
2191
026331c4
JM		 2192 /* drop too small frames */
2193 if (len < IEEE80211_MIN_ACTION_SIZE)
84040805 2194 return RX_DROP_UNUSABLE;
de1ede7a 2195
026331c4 2196 if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC)
84040805 2197 return RX_DROP_UNUSABLE;
de1ede7a 2198
554891e6 2199 if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
84040805 2200 return RX_DROP_UNUSABLE;
97ebe12a 2201
de1ede7a
JB		 2202 switch (mgmt->u.action.category) {
2203 case WLAN_CATEGORY_BACK:
8abd3f9b
JB		 2204 /*
2205 * The aggregation code is not prepared to handle
2206 * anything but STA/AP due to the BSSID handling;
2207 * IBSS could work in the code but isn't supported
2208 * by drivers or the standard.
2209 */
2210 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2211 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2212 sdata->vif.type != NL80211_IFTYPE_AP)
84040805 2213 break;
8abd3f9b 2214
026331c4
JM		 2215 /* verify action_code is present */
2216 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2217 break;
2218
de1ede7a
JB		 2219 switch (mgmt->u.action.u.addba_req.action_code) {
2220 case WLAN_ACTION_ADDBA_REQ:
2221 if (len < (IEEE80211_MIN_ACTION_SIZE +
2222 sizeof(mgmt->u.action.u.addba_req)))
bed7ee6e
JB		 2223 goto invalid;
2224 break;
de1ede7a
JB		 2225 case WLAN_ACTION_ADDBA_RESP:
2226 if (len < (IEEE80211_MIN_ACTION_SIZE +
2227 sizeof(mgmt->u.action.u.addba_resp)))
bed7ee6e
JB		 2228 goto invalid;
2229 break;
de1ede7a
JB		 2230 case WLAN_ACTION_DELBA:
2231 if (len < (IEEE80211_MIN_ACTION_SIZE +
2232 sizeof(mgmt->u.action.u.delba)))
bed7ee6e
JB		 2233 goto invalid;
2234 break;
2235 default:
2236 goto invalid;
de1ede7a 2237 }
bed7ee6e 2238
8b58ff83 2239 goto queue;
39192c0b
JB		 2240 case WLAN_CATEGORY_SPECTRUM_MGMT:
2241 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
84040805 2242 break;
46900298
JB		 2243
2244 if (sdata->vif.type != NL80211_IFTYPE_STATION)
84040805 2245 break;
46900298 2246
026331c4
JM		 2247 /* verify action_code is present */
2248 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2249 break;
2250
39192c0b
JB		 2251 switch (mgmt->u.action.u.measurement.action_code) {
2252 case WLAN_ACTION_SPCT_MSR_REQ:
2253 if (len < (IEEE80211_MIN_ACTION_SIZE +
2254 sizeof(mgmt->u.action.u.measurement)))
84040805 2255 break;
39192c0b 2256 ieee80211_process_measurement_req(sdata, mgmt, len);
84040805 2257 goto handled;
c481ec97
S		 2258 case WLAN_ACTION_SPCT_CHL_SWITCH:
2259 if (len < (IEEE80211_MIN_ACTION_SIZE +
2260 sizeof(mgmt->u.action.u.chan_switch)))
84040805 2261 break;
c481ec97 2262
cc32abd4 2263 if (sdata->vif.type != NL80211_IFTYPE_STATION)
84040805 2264 break;
cc32abd4 2265
46900298 2266 if (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN))
84040805 2267 break;
c481ec97 2268
8b58ff83 2269 goto queue;
39192c0b
JB		 2270 }
2271 break;
fea14732
JM		 2272 case WLAN_CATEGORY_SA_QUERY:
2273 if (len < (IEEE80211_MIN_ACTION_SIZE +
2274 sizeof(mgmt->u.action.u.sa_query)))
84040805
JB		 2275 break;
2276
fea14732
JM		 2277 switch (mgmt->u.action.u.sa_query.action) {
2278 case WLAN_ACTION_SA_QUERY_REQUEST:
2279 if (sdata->vif.type != NL80211_IFTYPE_STATION)
84040805 2280 break;
fea14732 2281 ieee80211_process_sa_query_req(sdata, mgmt, len);
84040805 2282 goto handled;
fea14732
JM		 2283 }
2284 break;
8db09850
TP		 2285 case WLAN_CATEGORY_SELF_PROTECTED:
2286 switch (mgmt->u.action.u.self_prot.action_code) {
2287 case WLAN_SP_MESH_PEERING_OPEN:
2288 case WLAN_SP_MESH_PEERING_CLOSE:
2289 case WLAN_SP_MESH_PEERING_CONFIRM:
2290 if (!ieee80211_vif_is_mesh(&sdata->vif))
2291 goto invalid;
2292 if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
2293 /* userspace handles this frame */
2294 break;
2295 goto queue;
2296 case WLAN_SP_MGK_INFORM:
2297 case WLAN_SP_MGK_ACK:
2298 if (!ieee80211_vif_is_mesh(&sdata->vif))
2299 goto invalid;
2300 break;
2301 }
2302 break;
d3aaec8a 2303 case WLAN_CATEGORY_MESH_ACTION:
77a121c3
JB		 2304 if (!ieee80211_vif_is_mesh(&sdata->vif))
2305 break;
25d49e4d
TP		 2306 if (mesh_action_is_path_sel(mgmt) &&
2307 (!mesh_path_sel_is_hwmp(sdata)))
c7108a71
JC		 2308 break;
2309 goto queue;
84040805 2310 }
026331c4 2311
2e161f78
JB		 2312 return RX_CONTINUE;
2313
bed7ee6e 2314 invalid:
554891e6 2315 status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM;
2e161f78
JB		 2316 /* will return in the next handlers */
2317 return RX_CONTINUE;
2318
2319 handled:
2320 if (rx->sta)
2321 rx->sta->rx_packets++;
2322 dev_kfree_skb(rx->skb);
2323 return RX_QUEUED;
2324
2325 queue:
2326 rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME;
2327 skb_queue_tail(&sdata->skb_queue, rx->skb);
2328 ieee80211_queue_work(&local->hw, &sdata->work);
2329 if (rx->sta)
2330 rx->sta->rx_packets++;
2331 return RX_QUEUED;
2332}
2333
2334static ieee80211_rx_result debug_noinline
2335ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx)
2336{
554891e6 2337 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
2e161f78
JB		 2338
2339 /* skip known-bad action frames and return them in the next handler */
554891e6 2340 if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM)
2e161f78 2341 return RX_CONTINUE;
d7907448 2342
026331c4
JM		 2343 /*
2344 * Getting here means the kernel doesn't know how to handle
2345 * it, but maybe userspace does ... include returned frames
2346 * so userspace can register for those to know whether ones
2347 * it transmitted were processed or returned.
2348 */
026331c4 2349
2e161f78
JB		 2350 if (cfg80211_rx_mgmt(rx->sdata->dev, status->freq,
2351 rx->skb->data, rx->skb->len,
2352 GFP_ATOMIC)) {
2353 if (rx->sta)
2354 rx->sta->rx_packets++;
2355 dev_kfree_skb(rx->skb);
2356 return RX_QUEUED;
2357 }
2358
2359
2360 return RX_CONTINUE;
2361}
2362
2363static ieee80211_rx_result debug_noinline
2364ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx)
2365{
2366 struct ieee80211_local *local = rx->local;
2367 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
2368 struct sk_buff *nskb;
2369 struct ieee80211_sub_if_data *sdata = rx->sdata;
554891e6 2370 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
2e161f78
JB		 2371
2372 if (!ieee80211_is_action(mgmt->frame_control))
2373 return RX_CONTINUE;
2374
2375 /*
2376 * For AP mode, hostapd is responsible for handling any action
2377 * frames that we didn't handle, including returning unknown
2378 * ones. For all other modes we will return them to the sender,
2379 * setting the 0x80 bit in the action category, as required by
2380 * 802.11-2007 7.3.1.11.
2381 * Newer versions of hostapd shall also use the management frame
2382 * registration mechanisms, but older ones still use cooked
2383 * monitor interfaces so push all frames there.
2384 */
554891e6 2385 if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) &&
2e161f78
JB		 2386 (sdata->vif.type == NL80211_IFTYPE_AP ||
2387 sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
2388 return RX_DROP_MONITOR;
026331c4 2389
84040805
JB		 2390 /* do not return rejected action frames */
2391 if (mgmt->u.action.category & 0x80)
2392 return RX_DROP_UNUSABLE;
2393
2394 nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0,
2395 GFP_ATOMIC);
2396 if (nskb) {
292b4df6 2397 struct ieee80211_mgmt *nmgmt = (void *)nskb->data;
84040805 2398
292b4df6
JL		 2399 nmgmt->u.action.category |= 0x80;
2400 memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN);
2401 memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN);
84040805
JB		 2402
2403 memset(nskb->cb, 0, sizeof(nskb->cb));
2404
2405 ieee80211_tx_skb(rx->sdata, nskb);
de1ede7a 2406 }
39192c0b
JB		 2407 dev_kfree_skb(rx->skb);
2408 return RX_QUEUED;
de1ede7a
JB		 2409}
2410
49461622 2411static ieee80211_rx_result debug_noinline
5cf121c3 2412ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
571ecf67 2413{
eb9fb5b8 2414 struct ieee80211_sub_if_data *sdata = rx->sdata;
af6b6374 2415 ieee80211_rx_result rxs;
77a121c3
JB		 2416 struct ieee80211_mgmt *mgmt = (void *)rx->skb->data;
2417 __le16 stype;
571ecf67 2418
af6b6374
JB		 2419 rxs = ieee80211_work_rx_mgmt(rx->sdata, rx->skb);
2420 if (rxs != RX_CONTINUE)
2421 return rxs;
2422
77a121c3 2423 stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE);
472dbc45 2424
77a121c3
JB		 2425 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
2426 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2427 sdata->vif.type != NL80211_IFTYPE_STATION)
2428 return RX_DROP_MONITOR;
472dbc45 2429
77a121c3
JB		 2430 switch (stype) {
2431 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2432 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2433 /* process for all: mesh, mlme, ibss */
2434 break;
2435 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2436 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2c31333a
CL		 2437 if (is_multicast_ether_addr(mgmt->da) &&
2438 !is_broadcast_ether_addr(mgmt->da))
2439 return RX_DROP_MONITOR;
2440
77a121c3
JB		 2441 /* process only for station */
2442 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2443 return RX_DROP_MONITOR;
2444 break;
2445 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2446 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2447 /* process only for ibss */
2448 if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
2449 return RX_DROP_MONITOR;
2450 break;
2451 default:
2452 return RX_DROP_MONITOR;
2453 }
f9d540ee 2454
77a121c3 2455 /* queue up frame and kick off work to process it */
c1475ca9 2456 rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME;
77a121c3
JB		 2457 skb_queue_tail(&sdata->skb_queue, rx->skb);
2458 ieee80211_queue_work(&rx->local->hw, &sdata->work);
8b58ff83
JB		 2459 if (rx->sta)
2460 rx->sta->rx_packets++;
46900298 2461
77a121c3 2462 return RX_QUEUED;
571ecf67
JB		 2463}
2464
5cf121c3 2465/* TODO: use IEEE80211_RX_FRAGMENTED */
5f0b7de5
JB		 2466static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
2467 struct ieee80211_rate *rate)
3d30d949
MW		 2468{
2469 struct ieee80211_sub_if_data *sdata;
2470 struct ieee80211_local *local = rx->local;
2471 struct ieee80211_rtap_hdr {
2472 struct ieee80211_radiotap_header hdr;
2473 u8 flags;
5f0b7de5 2474 u8 rate_or_pad;
3d30d949
MW		 2475 __le16 chan_freq;
2476 __le16 chan_flags;
bc10502d 2477 } __packed *rthdr;
3d30d949
MW		 2478 struct sk_buff *skb = rx->skb, *skb2;
2479 struct net_device *prev_dev = NULL;
eb9fb5b8 2480 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
3d30d949 2481
554891e6
JB		 2482 /*
2483 * If cooked monitor has been processed already, then
2484 * don't do it again. If not, set the flag.
2485 */
2486 if (rx->flags & IEEE80211_RX_CMNTR)
7c1e1831 2487 goto out_free_skb;
554891e6 2488 rx->flags |= IEEE80211_RX_CMNTR;
7c1e1831 2489
3d30d949
MW		 2490 if (skb_headroom(skb) < sizeof(*rthdr) &&
2491 pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC))
2492 goto out_free_skb;
2493
2494 rthdr = (void *)skb_push(skb, sizeof(*rthdr));
2495 memset(rthdr, 0, sizeof(*rthdr));
2496 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
2497 rthdr->hdr.it_present =
2498 cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
3d30d949
MW		 2499 (1 << IEEE80211_RADIOTAP_CHANNEL));
2500
5f0b7de5
JB		 2501 if (rate) {
2502 rthdr->rate_or_pad = rate->bitrate / 5;
2503 rthdr->hdr.it_present |=
2504 cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
2505 }
3d30d949
MW		 2506 rthdr->chan_freq = cpu_to_le16(status->freq);
2507
2508 if (status->band == IEEE80211_BAND_5GHZ)
2509 rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_OFDM |
2510 IEEE80211_CHAN_5GHZ);
2511 else
2512 rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_DYN |
2513 IEEE80211_CHAN_2GHZ);
2514
2515 skb_set_mac_header(skb, 0);
2516 skb->ip_summed = CHECKSUM_UNNECESSARY;
2517 skb->pkt_type = PACKET_OTHERHOST;
2518 skb->protocol = htons(ETH_P_802_2);
2519
2520 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
9607e6b6 2521 if (!ieee80211_sdata_running(sdata))
3d30d949
MW		 2522 continue;
2523
05c914fe 2524 if (sdata->vif.type != NL80211_IFTYPE_MONITOR ||
3d30d949
MW		 2525 !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES))
2526 continue;
2527
2528 if (prev_dev) {
2529 skb2 = skb_clone(skb, GFP_ATOMIC);
2530 if (skb2) {
2531 skb2->dev = prev_dev;
5548a8a1 2532 netif_receive_skb(skb2);
3d30d949
MW		 2533 }
2534 }
2535
2536 prev_dev = sdata->dev;
2537 sdata->dev->stats.rx_packets++;
2538 sdata->dev->stats.rx_bytes += skb->len;
2539 }
2540
2541 if (prev_dev) {
2542 skb->dev = prev_dev;
5548a8a1 2543 netif_receive_skb(skb);
554891e6
JB		 2544 return;
2545 }
3d30d949
MW		 2546
2547 out_free_skb:
2548 dev_kfree_skb(skb);
2549}
2550
aa0c8636
CL		 2551static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx,
2552 ieee80211_rx_result res)
2553{
2554 switch (res) {
2555 case RX_DROP_MONITOR:
2556 I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
2557 if (rx->sta)
2558 rx->sta->rx_dropped++;
2559 /* fall through */
2560 case RX_CONTINUE: {
2561 struct ieee80211_rate *rate = NULL;
2562 struct ieee80211_supported_band *sband;
2563 struct ieee80211_rx_status *status;
2564
2565 status = IEEE80211_SKB_RXCB((rx->skb));
2566
2567 sband = rx->local->hw.wiphy->bands[status->band];
2568 if (!(status->flag & RX_FLAG_HT))
2569 rate = &sband->bitrates[status->rate_idx];
2570
2571 ieee80211_rx_cooked_monitor(rx, rate);
2572 break;
2573 }
2574 case RX_DROP_UNUSABLE:
2575 I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
2576 if (rx->sta)
2577 rx->sta->rx_dropped++;
2578 dev_kfree_skb(rx->skb);
2579 break;
2580 case RX_QUEUED:
2581 I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued);
2582 break;
2583 }
2584}
571ecf67 2585
24a8fdad 2586static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx)
58905290 2587{
58905290 2588 ieee80211_rx_result res = RX_DROP_MONITOR;
aa0c8636 2589 struct sk_buff *skb;
8944b79f 2590
e32f85f7
LCC		 2591#define CALL_RXH(rxh) \
2592 do { \
2593 res = rxh(rx); \
2594 if (res != RX_CONTINUE) \
2569a826 2595 goto rxh_next; \
e32f85f7 2596 } while (0);
49461622 2597
24a8fdad
CL		 2598 spin_lock(&rx->local->rx_skb_queue.lock);
2599 if (rx->local->running_rx_handler)
2600 goto unlock;
2601
2602 rx->local->running_rx_handler = true;
2603
2604 while ((skb = __skb_dequeue(&rx->local->rx_skb_queue))) {
2605 spin_unlock(&rx->local->rx_skb_queue.lock);
2606
2569a826
JB		 2607 /*
2608 * all the other fields are valid across frames
2609 * that belong to an aMPDU since they are on the
2610 * same TID from the same station
2611 */
2612 rx->skb = skb;
2613
2614 CALL_RXH(ieee80211_rx_h_decrypt)
2615 CALL_RXH(ieee80211_rx_h_check_more_data)
47086fc5 2616 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll)
2569a826
JB		 2617 CALL_RXH(ieee80211_rx_h_sta_process)
2618 CALL_RXH(ieee80211_rx_h_defragment)
2569a826
JB		 2619 CALL_RXH(ieee80211_rx_h_michael_mic_verify)
2620 /* must be after MMIC verify so header is counted in MPDU mic */
bf94e17b 2621#ifdef CONFIG_MAC80211_MESH
aa0c8636 2622 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
2569a826 2623 CALL_RXH(ieee80211_rx_h_mesh_fwding);
bf94e17b 2624#endif
2154c81c
JC		 2625 CALL_RXH(ieee80211_rx_h_remove_qos_control)
2626 CALL_RXH(ieee80211_rx_h_amsdu)
2569a826 2627 CALL_RXH(ieee80211_rx_h_data)
24a8fdad 2628 CALL_RXH(ieee80211_rx_h_ctrl);
2e161f78 2629 CALL_RXH(ieee80211_rx_h_mgmt_check)
2569a826 2630 CALL_RXH(ieee80211_rx_h_action)
2e161f78
JB		 2631 CALL_RXH(ieee80211_rx_h_userspace_mgmt)
2632 CALL_RXH(ieee80211_rx_h_action_return)
2569a826 2633 CALL_RXH(ieee80211_rx_h_mgmt)
49461622 2634
aa0c8636
CL		 2635 rxh_next:
2636 ieee80211_rx_handlers_result(rx, res);
24a8fdad 2637 spin_lock(&rx->local->rx_skb_queue.lock);
49461622 2638#undef CALL_RXH
aa0c8636 2639 }
24a8fdad
CL		 2640
2641 rx->local->running_rx_handler = false;
2642
2643 unlock:
2644 spin_unlock(&rx->local->rx_skb_queue.lock);
aa0c8636
CL		 2645}
2646
4406c376 2647static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx)
aa0c8636 2648{
aa0c8636
CL		 2649 ieee80211_rx_result res = RX_DROP_MONITOR;
2650
aa0c8636
CL		 2651#define CALL_RXH(rxh) \
2652 do { \
2653 res = rxh(rx); \
2654 if (res != RX_CONTINUE) \
2655 goto rxh_next; \
2656 } while (0);
2657
2658 CALL_RXH(ieee80211_rx_h_passive_scan)
2659 CALL_RXH(ieee80211_rx_h_check)
2660
24a8fdad 2661 ieee80211_rx_reorder_ampdu(rx);
aa0c8636 2662
24a8fdad 2663 ieee80211_rx_handlers(rx);
aa0c8636 2664 return;
49461622 2665
2569a826 2666 rxh_next:
aa0c8636
CL		 2667 ieee80211_rx_handlers_result(rx, res);
2668
2669#undef CALL_RXH
58905290
JB		 2670}
2671
2bff8ebf 2672/*
dd318575
JB		 2673 * This function makes calls into the RX path, therefore
2674 * it has to be invoked under RCU read lock.
2bff8ebf
CL		 2675 */
2676void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid)
2677{
554891e6
JB		 2678 struct ieee80211_rx_data rx = {
2679 .sta = sta,
2680 .sdata = sta->sdata,
2681 .local = sta->local,
9e26297a
JB		 2682 /* This is OK -- must be QoS data frame */
2683 .security_idx = tid,
2684 .seqno_idx = tid,
fcf8bd3b 2685 .flags = 0,
554891e6 2686 };
2c15a0cf
CL		 2687 struct tid_ampdu_rx *tid_agg_rx;
2688
2689 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
2690 if (!tid_agg_rx)
2691 return;
2bff8ebf 2692
2c15a0cf 2693 spin_lock(&tid_agg_rx->reorder_lock);
24a8fdad 2694 ieee80211_sta_reorder_release(&sta->local->hw, tid_agg_rx);
2c15a0cf 2695 spin_unlock(&tid_agg_rx->reorder_lock);
2bff8ebf 2696
24a8fdad 2697 ieee80211_rx_handlers(&rx);
2bff8ebf
CL		 2698}
2699
571ecf67
JB		 2700/* main receive path */
2701
20b01f80 2702static int prepare_for_handlers(struct ieee80211_rx_data *rx,
23a24def
JB		 2703 struct ieee80211_hdr *hdr)
2704{
20b01f80 2705 struct ieee80211_sub_if_data *sdata = rx->sdata;
eb9fb5b8
JB		 2706 struct sk_buff *skb = rx->skb;
2707 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
2708 u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type);
23a24def
JB		 2709 int multicast = is_multicast_ether_addr(hdr->addr1);
2710
51fb61e7 2711 switch (sdata->vif.type) {
05c914fe 2712 case NL80211_IFTYPE_STATION:
9bc383de 2713 if (!bssid && !sdata->u.mgd.use_4addr)
23a24def 2714 return 0;
77fdaa12 2715 if (!multicast &&
47846c9b 2716 compare_ether_addr(sdata->vif.addr, hdr->addr1) != 0) {
4f312336
FF		 2717 if (!(sdata->dev->flags & IFF_PROMISC) ||
2718 sdata->u.mgd.use_4addr)
23a24def 2719 return 0;
554891e6 2720 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
23a24def
JB		 2721 }
2722 break;
05c914fe 2723 case NL80211_IFTYPE_ADHOC:
23a24def
JB		 2724 if (!bssid)
2725 return 0;
a7767f95 2726 if (ieee80211_is_beacon(hdr->frame_control)) {
9d9bf77d 2727 return 1;
87291c02 2728 }
46900298 2729 else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) {
554891e6 2730 if (!(status->rx_flags & IEEE80211_RX_IN_SCAN))
23a24def 2731 return 0;
554891e6 2732 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
23a24def 2733 } else if (!multicast &&
47846c9b 2734 compare_ether_addr(sdata->vif.addr,
23a24def 2735 hdr->addr1) != 0) {
4150c572 2736 if (!(sdata->dev->flags & IFF_PROMISC))
23a24def 2737 return 0;
554891e6 2738 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
0fb8ca45
JM		 2739 } else if (!rx->sta) {
2740 int rate_idx;
eb9fb5b8 2741 if (status->flag & RX_FLAG_HT)
0fb8ca45
JM		 2742 rate_idx = 0; /* TODO: HT rates */
2743 else
eb9fb5b8 2744 rate_idx = status->rate_idx;
34e89507
JB		 2745 rx->sta = ieee80211_ibss_add_sta(sdata, bssid,
2746 hdr->addr2, BIT(rate_idx), GFP_ATOMIC);
0fb8ca45 2747 }
23a24def 2748 break;
05c914fe 2749 case NL80211_IFTYPE_MESH_POINT:
6032f934 2750 if (!multicast &&
47846c9b 2751 compare_ether_addr(sdata->vif.addr,
6032f934
JB		 2752 hdr->addr1) != 0) {
2753 if (!(sdata->dev->flags & IFF_PROMISC))
2754 return 0;
2755
554891e6 2756 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
6032f934
JB		 2757 }
2758 break;
05c914fe
JB		 2759 case NL80211_IFTYPE_AP_VLAN:
2760 case NL80211_IFTYPE_AP:
23a24def 2761 if (!bssid) {
47846c9b 2762 if (compare_ether_addr(sdata->vif.addr,
23a24def
JB		 2763 hdr->addr1))
2764 return 0;
2765 } else if (!ieee80211_bssid_match(bssid,
47846c9b 2766 sdata->vif.addr)) {
771bbd09 2767 if (!(status->rx_flags & IEEE80211_RX_IN_SCAN) &&
a21fa87e
AN		 2768 !ieee80211_is_beacon(hdr->frame_control) &&
2769 !(ieee80211_is_action(hdr->frame_control) &&
2770 sdata->vif.p2p))
23a24def 2771 return 0;
554891e6 2772 status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
23a24def 2773 }
23a24def 2774 break;
05c914fe 2775 case NL80211_IFTYPE_WDS:
a7767f95 2776 if (bssid || !ieee80211_is_data(hdr->frame_control))
23a24def
JB		 2777 return 0;
2778 if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2))
2779 return 0;
2780 break;
2ca27bcf 2781 default:
fb1c1cd6
JB		 2782 /* should never get here */
2783 WARN_ON(1);
2784 break;
23a24def
JB		 2785 }
2786
2787 return 1;
2788}
2789
4406c376
JB		 2790/*
2791 * This function returns whether or not the SKB
2792 * was destined for RX processing or not, which,
2793 * if consume is true, is equivalent to whether
2794 * or not the skb was consumed.
2795 */
2796static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx,
2797 struct sk_buff *skb, bool consume)
2798{
2799 struct ieee80211_local *local = rx->local;
2800 struct ieee80211_sub_if_data *sdata = rx->sdata;
2801 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
2802 struct ieee80211_hdr *hdr = (void *)skb->data;
2803 int prepares;
2804
2805 rx->skb = skb;
554891e6 2806 status->rx_flags |= IEEE80211_RX_RA_MATCH;
4406c376
JB		 2807 prepares = prepare_for_handlers(rx, hdr);
2808
2809 if (!prepares)
2810 return false;
2811
4406c376
JB		 2812 if (!consume) {
2813 skb = skb_copy(skb, GFP_ATOMIC);
2814 if (!skb) {
2815 if (net_ratelimit())
2816 wiphy_debug(local->hw.wiphy,
b305dae4 2817 "failed to copy skb for %s\n",
4406c376
JB		 2818 sdata->name);
2819 return true;
2820 }
2821
2822 rx->skb = skb;
2823 }
2824
2825 ieee80211_invoke_rx_handlers(rx);
2826 return true;
2827}
2828
571ecf67 2829/*
6368e4b1
RR		 2830 * This is the actual Rx frames handler. as it blongs to Rx path it must
2831 * be called with rcu_read_lock protection.
571ecf67 2832 */
71ebb4aa 2833static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
071d9ac2 2834 struct sk_buff *skb)
571ecf67 2835{
554891e6 2836 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
571ecf67
JB		 2837 struct ieee80211_local *local = hw_to_local(hw);
2838 struct ieee80211_sub_if_data *sdata;
571ecf67 2839 struct ieee80211_hdr *hdr;
e3cf8b3f 2840 __le16 fc;
5cf121c3 2841 struct ieee80211_rx_data rx;
4406c376 2842 struct ieee80211_sub_if_data *prev;
56af3268 2843 struct sta_info *sta, *tmp, *prev_sta;
e3cf8b3f 2844 int err = 0;
571ecf67 2845
e3cf8b3f 2846 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
571ecf67
JB		 2847 memset(&rx, 0, sizeof(rx));
2848 rx.skb = skb;
2849 rx.local = local;
72abd81b 2850
e3cf8b3f 2851 if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc))
571ecf67 2852 local->dot11ReceivedFragmentCount++;
571ecf67 2853
142b9f50 2854 if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
b23b025f 2855 test_bit(SCAN_SW_SCANNING, &local->scanning)))
554891e6 2856 status->rx_flags |= IEEE80211_RX_IN_SCAN;
571ecf67 2857
e3cf8b3f
ZY		 2858 if (ieee80211_is_mgmt(fc))
2859 err = skb_linearize(skb);
2860 else
2861 err = !pskb_may_pull(skb, ieee80211_hdrlen(fc));
2862
2863 if (err) {
2864 dev_kfree_skb(skb);
2865 return;
2866 }
2867
2868 hdr = (struct ieee80211_hdr *)skb->data;
38f3714d 2869 ieee80211_parse_qos(&rx);
d1c3a37c 2870 ieee80211_verify_alignment(&rx);
38f3714d 2871
e3cf8b3f 2872 if (ieee80211_is_data(fc)) {
56af3268 2873 prev_sta = NULL;
4406c376 2874
2a33bee2 2875 for_each_sta_info_rx(local, hdr->addr2, sta, tmp) {
56af3268
BG		 2876 if (!prev_sta) {
2877 prev_sta = sta;
2878 continue;
2879 }
2880
2881 rx.sta = prev_sta;
2882 rx.sdata = prev_sta->sdata;
4406c376 2883 ieee80211_prepare_and_rx_handle(&rx, skb, false);
abe60632 2884
56af3268 2885 prev_sta = sta;
4406c376 2886 }
56af3268
BG		 2887
2888 if (prev_sta) {
2889 rx.sta = prev_sta;
2890 rx.sdata = prev_sta->sdata;
2891
4406c376 2892 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
56af3268 2893 return;
8e26d5ad 2894 goto out;
56af3268 2895 }
4406c376
JB		 2896 }
2897
4b0dd98e 2898 prev = NULL;
b2e7771e 2899
4b0dd98e
JB		 2900 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2901 if (!ieee80211_sdata_running(sdata))
2902 continue;
340e11f3 2903
4b0dd98e
JB		 2904 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2905 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2906 continue;
340e11f3 2907
4b0dd98e
JB		 2908 /*
2909 * frame is destined for this interface, but if it's
2910 * not also for the previous one we handle that after
2911 * the loop to avoid copying the SKB once too much
2912 */
4bb29f8c 2913
4b0dd98e 2914 if (!prev) {
abe60632 2915 prev = sdata;
4b0dd98e 2916 continue;
340e11f3 2917 }
4bb29f8c 2918
2a33bee2 2919 rx.sta = sta_info_get_bss_rx(prev, hdr->addr2);
4b0dd98e
JB		 2920 rx.sdata = prev;
2921 ieee80211_prepare_and_rx_handle(&rx, skb, false);
4bb29f8c 2922
4b0dd98e
JB		 2923 prev = sdata;
2924 }
2925
2926 if (prev) {
2a33bee2 2927 rx.sta = sta_info_get_bss_rx(prev, hdr->addr2);
4b0dd98e 2928 rx.sdata = prev;
4406c376 2929
4b0dd98e
JB		 2930 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
2931 return;
571ecf67 2932 }
4406c376 2933
8e26d5ad 2934 out:
4406c376 2935 dev_kfree_skb(skb);
571ecf67 2936}
6368e4b1
RR		 2937
2938/*
2939 * This is the receive path handler. It is called by a low level driver when an
2940 * 802.11 MPDU is received from the hardware.
2941 */
103bf9f7 2942void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
6368e4b1
RR		 2943{
2944 struct ieee80211_local *local = hw_to_local(hw);
8318d78a
JB		 2945 struct ieee80211_rate *rate = NULL;
2946 struct ieee80211_supported_band *sband;
f1d58c25 2947 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
8318d78a 2948
d20ef63d
JB		 2949 WARN_ON_ONCE(softirq_count() == 0);
2950
77a980dc
JB		 2951 if (WARN_ON(status->band < 0 ||
2952 status->band >= IEEE80211_NUM_BANDS))
2953 goto drop;
8318d78a
JB		 2954
2955 sband = local->hw.wiphy->bands[status->band];
77a980dc
JB		 2956 if (WARN_ON(!sband))
2957 goto drop;
8318d78a 2958
89c3a8ac
JB		 2959 /*
2960 * If we're suspending, it is possible although not too likely
2961 * that we'd be receiving frames after having already partially
2962 * quiesced the stack. We can't process such frames then since
2963 * that might, for example, cause stations to be added or other
2964 * driver callbacks be invoked.
2965 */
77a980dc
JB		 2966 if (unlikely(local->quiescing || local->suspended))
2967 goto drop;
89c3a8ac 2968
ea77f12f
JB		 2969 /*
2970 * The same happens when we're not even started,
2971 * but that's worth a warning.
2972 */
77a980dc
JB		 2973 if (WARN_ON(!local->started))
2974 goto drop;
ea77f12f 2975
fc885189 2976 if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) {
e5d6eb83 2977 /*
fc885189
JB		 2978 * Validate the rate, unless a PLCP error means that
2979 * we probably can't have a valid rate here anyway.
e5d6eb83 2980 */
fc885189
JB		 2981
2982 if (status->flag & RX_FLAG_HT) {
2983 /*
2984 * rate_idx is MCS index, which can be [0-76]
2985 * as documented on:
2986 *
2987 * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
2988 *
2989 * Anything else would be some sort of driver or
2990 * hardware error. The driver should catch hardware
2991 * errors.
2992 */
2993 if (WARN((status->rate_idx < 0 ||
2994 status->rate_idx > 76),
2995 "Rate marked as an HT rate but passed "
2996 "status->rate_idx is not "
2997 "an MCS index [0-76]: %d (0x%02x)\n",
2998 status->rate_idx,
2999 status->rate_idx))
3000 goto drop;
3001 } else {
3002 if (WARN_ON(status->rate_idx < 0 ||
3003 status->rate_idx >= sband->n_bitrates))
3004 goto drop;
3005 rate = &sband->bitrates[status->rate_idx];
3006 }
0fb8ca45 3007 }
6368e4b1 3008
554891e6
JB		 3009 status->rx_flags = 0;
3010
6368e4b1
RR		 3011 /*
3012 * key references and virtual interfaces are protected using RCU
3013 * and this requires that we are in a read-side RCU section during
3014 * receive processing
3015 */
3016 rcu_read_lock();
3017
3018 /*
3019 * Frames with failed FCS/PLCP checksum are not returned,
3020 * all other frames are returned without radiotap header
3021 * if it was previously present.
3022 * Also, frames with less than 16 bytes are dropped.
3023 */
f1d58c25 3024 skb = ieee80211_rx_monitor(local, skb, rate);
6368e4b1
RR		 3025 if (!skb) {
3026 rcu_read_unlock();
3027 return;
3028 }
3029
e1e54068
JB		 3030 ieee80211_tpt_led_trig_rx(local,
3031 ((struct ieee80211_hdr *)skb->data)->frame_control,
3032 skb->len);
071d9ac2 3033 __ieee80211_rx_handle_packet(hw, skb);
6368e4b1
RR		 3034
3035 rcu_read_unlock();
77a980dc
JB		 3036
3037 return;
3038 drop:
3039 kfree_skb(skb);
6368e4b1 3040}
103bf9f7 3041EXPORT_SYMBOL(ieee80211_rx);
571ecf67
JB		 3042
3043/* This is a version of the rx handler that can be called from hard irq
3044 * context. Post the skb on the queue and schedule the tasklet */
f1d58c25 3045void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb)
571ecf67
JB		 3046{
3047 struct ieee80211_local *local = hw_to_local(hw);
3048
3049 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
3050
571ecf67
JB		 3051 skb->pkt_type = IEEE80211_RX_MSG;
3052 skb_queue_tail(&local->skb_queue, skb);
3053 tasklet_schedule(&local->tasklet);
3054}
3055EXPORT_SYMBOL(ieee80211_rx_irqsafe);
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