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-rw-r--r--net/ieee80211/ieee80211_rx.c1189
1 files changed, 1189 insertions, 0 deletions
diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
new file mode 100644
index 000000000000..d582faa6447d
--- /dev/null
+++ b/net/ieee80211/ieee80211_rx.c
@@ -0,0 +1,1189 @@
1/*
2 * Original code based Host AP (software wireless LAN access point) driver
3 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
4 *
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6 * <jkmaline@cc.hut.fi>
7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
8 * Copyright (c) 2004, Intel Corporation
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation. See README and COPYING for
13 * more details.
14 */
15
16#include <linux/compiler.h>
17#include <linux/config.h>
18#include <linux/errno.h>
19#include <linux/if_arp.h>
20#include <linux/in6.h>
21#include <linux/in.h>
22#include <linux/ip.h>
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/netdevice.h>
26#include <linux/proc_fs.h>
27#include <linux/skbuff.h>
28#include <linux/slab.h>
29#include <linux/tcp.h>
30#include <linux/types.h>
31#include <linux/version.h>
32#include <linux/wireless.h>
33#include <linux/etherdevice.h>
34#include <asm/uaccess.h>
35#include <linux/ctype.h>
36
37#include <net/ieee80211.h>
38
39static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
40 struct sk_buff *skb,
41 struct ieee80211_rx_stats *rx_stats)
42{
43 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
44 u16 fc = le16_to_cpu(hdr->frame_ctl);
45
46 skb->dev = ieee->dev;
47 skb->mac.raw = skb->data;
48 skb_pull(skb, ieee80211_get_hdrlen(fc));
49 skb->pkt_type = PACKET_OTHERHOST;
50 skb->protocol = __constant_htons(ETH_P_80211_RAW);
51 memset(skb->cb, 0, sizeof(skb->cb));
52 netif_rx(skb);
53}
54
55
56/* Called only as a tasklet (software IRQ) */
57static struct ieee80211_frag_entry *
58ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
59 unsigned int frag, u8 *src, u8 *dst)
60{
61 struct ieee80211_frag_entry *entry;
62 int i;
63
64 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
65 entry = &ieee->frag_cache[i];
66 if (entry->skb != NULL &&
67 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
68 IEEE80211_DEBUG_FRAG(
69 "expiring fragment cache entry "
70 "seq=%u last_frag=%u\n",
71 entry->seq, entry->last_frag);
72 dev_kfree_skb_any(entry->skb);
73 entry->skb = NULL;
74 }
75
76 if (entry->skb != NULL && entry->seq == seq &&
77 (entry->last_frag + 1 == frag || frag == -1) &&
78 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
79 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
80 return entry;
81 }
82
83 return NULL;
84}
85
86/* Called only as a tasklet (software IRQ) */
87static struct sk_buff *
88ieee80211_frag_cache_get(struct ieee80211_device *ieee,
89 struct ieee80211_hdr *hdr)
90{
91 struct sk_buff *skb = NULL;
92 u16 sc;
93 unsigned int frag, seq;
94 struct ieee80211_frag_entry *entry;
95
96 sc = le16_to_cpu(hdr->seq_ctl);
97 frag = WLAN_GET_SEQ_FRAG(sc);
98 seq = WLAN_GET_SEQ_SEQ(sc);
99
100 if (frag == 0) {
101 /* Reserve enough space to fit maximum frame length */
102 skb = dev_alloc_skb(ieee->dev->mtu +
103 sizeof(struct ieee80211_hdr) +
104 8 /* LLC */ +
105 2 /* alignment */ +
106 8 /* WEP */ + ETH_ALEN /* WDS */);
107 if (skb == NULL)
108 return NULL;
109
110 entry = &ieee->frag_cache[ieee->frag_next_idx];
111 ieee->frag_next_idx++;
112 if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
113 ieee->frag_next_idx = 0;
114
115 if (entry->skb != NULL)
116 dev_kfree_skb_any(entry->skb);
117
118 entry->first_frag_time = jiffies;
119 entry->seq = seq;
120 entry->last_frag = frag;
121 entry->skb = skb;
122 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
123 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
124 } else {
125 /* received a fragment of a frame for which the head fragment
126 * should have already been received */
127 entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
128 hdr->addr1);
129 if (entry != NULL) {
130 entry->last_frag = frag;
131 skb = entry->skb;
132 }
133 }
134
135 return skb;
136}
137
138
139/* Called only as a tasklet (software IRQ) */
140static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
141 struct ieee80211_hdr *hdr)
142{
143 u16 sc;
144 unsigned int seq;
145 struct ieee80211_frag_entry *entry;
146
147 sc = le16_to_cpu(hdr->seq_ctl);
148 seq = WLAN_GET_SEQ_SEQ(sc);
149
150 entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
151 hdr->addr1);
152
153 if (entry == NULL) {
154 IEEE80211_DEBUG_FRAG(
155 "could not invalidate fragment cache "
156 "entry (seq=%u)\n", seq);
157 return -1;
158 }
159
160 entry->skb = NULL;
161 return 0;
162}
163
164
165#ifdef NOT_YET
166/* ieee80211_rx_frame_mgtmt
167 *
168 * Responsible for handling management control frames
169 *
170 * Called by ieee80211_rx */
171static inline int
172ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
173 struct ieee80211_rx_stats *rx_stats, u16 type,
174 u16 stype)
175{
176 if (ieee->iw_mode == IW_MODE_MASTER) {
177 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
178 ieee->dev->name);
179 return 0;
180/*
181 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr *)
182 skb->data);*/
183 }
184
185 if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
186 if (stype == WLAN_FC_STYPE_BEACON &&
187 ieee->iw_mode == IW_MODE_MASTER) {
188 struct sk_buff *skb2;
189 /* Process beacon frames also in kernel driver to
190 * update STA(AP) table statistics */
191 skb2 = skb_clone(skb, GFP_ATOMIC);
192 if (skb2)
193 hostap_rx(skb2->dev, skb2, rx_stats);
194 }
195
196 /* send management frames to the user space daemon for
197 * processing */
198 ieee->apdevstats.rx_packets++;
199 ieee->apdevstats.rx_bytes += skb->len;
200 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
201 return 0;
202 }
203
204 if (ieee->iw_mode == IW_MODE_MASTER) {
205 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
206 printk(KERN_DEBUG "%s: unknown management frame "
207 "(type=0x%02x, stype=0x%02x) dropped\n",
208 skb->dev->name, type, stype);
209 return -1;
210 }
211
212 hostap_rx(skb->dev, skb, rx_stats);
213 return 0;
214 }
215
216 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
217 "received in non-Host AP mode\n", skb->dev->name);
218 return -1;
219}
220#endif
221
222
223/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
224/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
225static unsigned char rfc1042_header[] =
226{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
227/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
228static unsigned char bridge_tunnel_header[] =
229{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
230/* No encapsulation header if EtherType < 0x600 (=length) */
231
232/* Called by ieee80211_rx_frame_decrypt */
233static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
234 struct sk_buff *skb)
235{
236 struct net_device *dev = ieee->dev;
237 u16 fc, ethertype;
238 struct ieee80211_hdr *hdr;
239 u8 *pos;
240
241 if (skb->len < 24)
242 return 0;
243
244 hdr = (struct ieee80211_hdr *) skb->data;
245 fc = le16_to_cpu(hdr->frame_ctl);
246
247 /* check that the frame is unicast frame to us */
248 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
249 IEEE80211_FCTL_TODS &&
250 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
251 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
252 /* ToDS frame with own addr BSSID and DA */
253 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
254 IEEE80211_FCTL_FROMDS &&
255 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
256 /* FromDS frame with own addr as DA */
257 } else
258 return 0;
259
260 if (skb->len < 24 + 8)
261 return 0;
262
263 /* check for port access entity Ethernet type */
264 pos = skb->data + 24;
265 ethertype = (pos[6] << 8) | pos[7];
266 if (ethertype == ETH_P_PAE)
267 return 1;
268
269 return 0;
270}
271
272/* Called only as a tasklet (software IRQ), by ieee80211_rx */
273static inline int
274ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
275 struct ieee80211_crypt_data *crypt)
276{
277 struct ieee80211_hdr *hdr;
278 int res, hdrlen;
279
280 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
281 return 0;
282
283 hdr = (struct ieee80211_hdr *) skb->data;
284 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
285
286#ifdef CONFIG_IEEE80211_CRYPT_TKIP
287 if (ieee->tkip_countermeasures &&
288 strcmp(crypt->ops->name, "TKIP") == 0) {
289 if (net_ratelimit()) {
290 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
291 "received packet from " MAC_FMT "\n",
292 ieee->dev->name, MAC_ARG(hdr->addr2));
293 }
294 return -1;
295 }
296#endif
297
298 atomic_inc(&crypt->refcnt);
299 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
300 atomic_dec(&crypt->refcnt);
301 if (res < 0) {
302 IEEE80211_DEBUG_DROP(
303 "decryption failed (SA=" MAC_FMT
304 ") res=%d\n", MAC_ARG(hdr->addr2), res);
305 if (res == -2)
306 IEEE80211_DEBUG_DROP("Decryption failed ICV "
307 "mismatch (key %d)\n",
308 skb->data[hdrlen + 3] >> 6);
309 ieee->ieee_stats.rx_discards_undecryptable++;
310 return -1;
311 }
312
313 return res;
314}
315
316
317/* Called only as a tasklet (software IRQ), by ieee80211_rx */
318static inline int
319ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
320 int keyidx, struct ieee80211_crypt_data *crypt)
321{
322 struct ieee80211_hdr *hdr;
323 int res, hdrlen;
324
325 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
326 return 0;
327
328 hdr = (struct ieee80211_hdr *) skb->data;
329 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
330
331 atomic_inc(&crypt->refcnt);
332 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
333 atomic_dec(&crypt->refcnt);
334 if (res < 0) {
335 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
336 " (SA=" MAC_FMT " keyidx=%d)\n",
337 ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
338 return -1;
339 }
340
341 return 0;
342}
343
344
345/* All received frames are sent to this function. @skb contains the frame in
346 * IEEE 802.11 format, i.e., in the format it was sent over air.
347 * This function is called only as a tasklet (software IRQ). */
348int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
349 struct ieee80211_rx_stats *rx_stats)
350{
351 struct net_device *dev = ieee->dev;
352 struct ieee80211_hdr *hdr;
353 size_t hdrlen;
354 u16 fc, type, stype, sc;
355 struct net_device_stats *stats;
356 unsigned int frag;
357 u8 *payload;
358 u16 ethertype;
359#ifdef NOT_YET
360 struct net_device *wds = NULL;
361 struct sk_buff *skb2 = NULL;
362 struct net_device *wds = NULL;
363 int frame_authorized = 0;
364 int from_assoc_ap = 0;
365 void *sta = NULL;
366#endif
367 u8 dst[ETH_ALEN];
368 u8 src[ETH_ALEN];
369 struct ieee80211_crypt_data *crypt = NULL;
370 int keyidx = 0;
371
372 hdr = (struct ieee80211_hdr *)skb->data;
373 stats = &ieee->stats;
374
375 if (skb->len < 10) {
376 printk(KERN_INFO "%s: SKB length < 10\n",
377 dev->name);
378 goto rx_dropped;
379 }
380
381 fc = le16_to_cpu(hdr->frame_ctl);
382 type = WLAN_FC_GET_TYPE(fc);
383 stype = WLAN_FC_GET_STYPE(fc);
384 sc = le16_to_cpu(hdr->seq_ctl);
385 frag = WLAN_GET_SEQ_FRAG(sc);
386 hdrlen = ieee80211_get_hdrlen(fc);
387
388#ifdef NOT_YET
389#if WIRELESS_EXT > 15
390 /* Put this code here so that we avoid duplicating it in all
391 * Rx paths. - Jean II */
392#ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
393 /* If spy monitoring on */
394 if (iface->spy_data.spy_number > 0) {
395 struct iw_quality wstats;
396 wstats.level = rx_stats->signal;
397 wstats.noise = rx_stats->noise;
398 wstats.updated = 6; /* No qual value */
399 /* Update spy records */
400 wireless_spy_update(dev, hdr->addr2, &wstats);
401 }
402#endif /* IW_WIRELESS_SPY */
403#endif /* WIRELESS_EXT > 15 */
404 hostap_update_rx_stats(local->ap, hdr, rx_stats);
405#endif
406
407#if WIRELESS_EXT > 15
408 if (ieee->iw_mode == IW_MODE_MONITOR) {
409 ieee80211_monitor_rx(ieee, skb, rx_stats);
410 stats->rx_packets++;
411 stats->rx_bytes += skb->len;
412 return 1;
413 }
414#endif
415
416 if (ieee->host_decrypt) {
417 int idx = 0;
418 if (skb->len >= hdrlen + 3)
419 idx = skb->data[hdrlen + 3] >> 6;
420 crypt = ieee->crypt[idx];
421#ifdef NOT_YET
422 sta = NULL;
423
424 /* Use station specific key to override default keys if the
425 * receiver address is a unicast address ("individual RA"). If
426 * bcrx_sta_key parameter is set, station specific key is used
427 * even with broad/multicast targets (this is against IEEE
428 * 802.11, but makes it easier to use different keys with
429 * stations that do not support WEP key mapping). */
430
431 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
432 (void) hostap_handle_sta_crypto(local, hdr, &crypt,
433 &sta);
434#endif
435
436 /* allow NULL decrypt to indicate an station specific override
437 * for default encryption */
438 if (crypt && (crypt->ops == NULL ||
439 crypt->ops->decrypt_mpdu == NULL))
440 crypt = NULL;
441
442 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
443 /* This seems to be triggered by some (multicast?)
444 * frames from other than current BSS, so just drop the
445 * frames silently instead of filling system log with
446 * these reports. */
447 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
448 " (SA=" MAC_FMT ")\n",
449 MAC_ARG(hdr->addr2));
450 ieee->ieee_stats.rx_discards_undecryptable++;
451 goto rx_dropped;
452 }
453 }
454
455#ifdef NOT_YET
456 if (type != WLAN_FC_TYPE_DATA) {
457 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
458 fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
459 (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0)
460 {
461 printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
462 "from " MAC_FMT "\n", dev->name,
463 MAC_ARG(hdr->addr2));
464 /* TODO: could inform hostapd about this so that it
465 * could send auth failure report */
466 goto rx_dropped;
467 }
468
469 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
470 goto rx_dropped;
471 else
472 goto rx_exit;
473 }
474#endif
475
476 /* Data frame - extract src/dst addresses */
477 if (skb->len < IEEE80211_3ADDR_LEN)
478 goto rx_dropped;
479
480 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
481 case IEEE80211_FCTL_FROMDS:
482 memcpy(dst, hdr->addr1, ETH_ALEN);
483 memcpy(src, hdr->addr3, ETH_ALEN);
484 break;
485 case IEEE80211_FCTL_TODS:
486 memcpy(dst, hdr->addr3, ETH_ALEN);
487 memcpy(src, hdr->addr2, ETH_ALEN);
488 break;
489 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
490 if (skb->len < IEEE80211_4ADDR_LEN)
491 goto rx_dropped;
492 memcpy(dst, hdr->addr3, ETH_ALEN);
493 memcpy(src, hdr->addr4, ETH_ALEN);
494 break;
495 case 0:
496 memcpy(dst, hdr->addr1, ETH_ALEN);
497 memcpy(src, hdr->addr2, ETH_ALEN);
498 break;
499 }
500
501#ifdef NOT_YET
502 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
503 goto rx_dropped;
504 if (wds) {
505 skb->dev = dev = wds;
506 stats = hostap_get_stats(dev);
507 }
508
509 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
510 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
511 ieee->stadev &&
512 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
513 /* Frame from BSSID of the AP for which we are a client */
514 skb->dev = dev = ieee->stadev;
515 stats = hostap_get_stats(dev);
516 from_assoc_ap = 1;
517 }
518#endif
519
520 dev->last_rx = jiffies;
521
522#ifdef NOT_YET
523 if ((ieee->iw_mode == IW_MODE_MASTER ||
524 ieee->iw_mode == IW_MODE_REPEAT) &&
525 !from_assoc_ap) {
526 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
527 wds != NULL)) {
528 case AP_RX_CONTINUE_NOT_AUTHORIZED:
529 frame_authorized = 0;
530 break;
531 case AP_RX_CONTINUE:
532 frame_authorized = 1;
533 break;
534 case AP_RX_DROP:
535 goto rx_dropped;
536 case AP_RX_EXIT:
537 goto rx_exit;
538 }
539 }
540#endif
541
542 /* Nullfunc frames may have PS-bit set, so they must be passed to
543 * hostap_handle_sta_rx() before being dropped here. */
544 if (stype != IEEE80211_STYPE_DATA &&
545 stype != IEEE80211_STYPE_DATA_CFACK &&
546 stype != IEEE80211_STYPE_DATA_CFPOLL &&
547 stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
548 if (stype != IEEE80211_STYPE_NULLFUNC)
549 IEEE80211_DEBUG_DROP(
550 "RX: dropped data frame "
551 "with no data (type=0x%02x, "
552 "subtype=0x%02x, len=%d)\n",
553 type, stype, skb->len);
554 goto rx_dropped;
555 }
556
557 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
558
559 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
560 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
561 goto rx_dropped;
562
563 hdr = (struct ieee80211_hdr *) skb->data;
564
565 /* skb: hdr + (possibly fragmented) plaintext payload */
566 // PR: FIXME: hostap has additional conditions in the "if" below:
567 // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
568 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
569 int flen;
570 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
571 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
572
573 if (!frag_skb) {
574 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
575 "Rx cannot get skb from fragment "
576 "cache (morefrag=%d seq=%u frag=%u)\n",
577 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
578 WLAN_GET_SEQ_SEQ(sc), frag);
579 goto rx_dropped;
580 }
581
582 flen = skb->len;
583 if (frag != 0)
584 flen -= hdrlen;
585
586 if (frag_skb->tail + flen > frag_skb->end) {
587 printk(KERN_WARNING "%s: host decrypted and "
588 "reassembled frame did not fit skb\n",
589 dev->name);
590 ieee80211_frag_cache_invalidate(ieee, hdr);
591 goto rx_dropped;
592 }
593
594 if (frag == 0) {
595 /* copy first fragment (including full headers) into
596 * beginning of the fragment cache skb */
597 memcpy(skb_put(frag_skb, flen), skb->data, flen);
598 } else {
599 /* append frame payload to the end of the fragment
600 * cache skb */
601 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
602 flen);
603 }
604 dev_kfree_skb_any(skb);
605 skb = NULL;
606
607 if (fc & IEEE80211_FCTL_MOREFRAGS) {
608 /* more fragments expected - leave the skb in fragment
609 * cache for now; it will be delivered to upper layers
610 * after all fragments have been received */
611 goto rx_exit;
612 }
613
614 /* this was the last fragment and the frame will be
615 * delivered, so remove skb from fragment cache */
616 skb = frag_skb;
617 hdr = (struct ieee80211_hdr *) skb->data;
618 ieee80211_frag_cache_invalidate(ieee, hdr);
619 }
620
621 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
622 * encrypted/authenticated */
623 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
624 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
625 goto rx_dropped;
626
627 hdr = (struct ieee80211_hdr *) skb->data;
628 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
629 if (/*ieee->ieee802_1x &&*/
630 ieee80211_is_eapol_frame(ieee, skb)) {
631 /* pass unencrypted EAPOL frames even if encryption is
632 * configured */
633 } else {
634 IEEE80211_DEBUG_DROP(
635 "encryption configured, but RX "
636 "frame not encrypted (SA=" MAC_FMT ")\n",
637 MAC_ARG(hdr->addr2));
638 goto rx_dropped;
639 }
640 }
641
642 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
643 !ieee80211_is_eapol_frame(ieee, skb)) {
644 IEEE80211_DEBUG_DROP(
645 "dropped unencrypted RX data "
646 "frame from " MAC_FMT
647 " (drop_unencrypted=1)\n",
648 MAC_ARG(hdr->addr2));
649 goto rx_dropped;
650 }
651
652 /* skb: hdr + (possible reassembled) full plaintext payload */
653
654 payload = skb->data + hdrlen;
655 ethertype = (payload[6] << 8) | payload[7];
656
657#ifdef NOT_YET
658 /* If IEEE 802.1X is used, check whether the port is authorized to send
659 * the received frame. */
660 if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
661 if (ethertype == ETH_P_PAE) {
662 printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
663 dev->name);
664 if (ieee->hostapd && ieee->apdev) {
665 /* Send IEEE 802.1X frames to the user
666 * space daemon for processing */
667 prism2_rx_80211(ieee->apdev, skb, rx_stats,
668 PRISM2_RX_MGMT);
669 ieee->apdevstats.rx_packets++;
670 ieee->apdevstats.rx_bytes += skb->len;
671 goto rx_exit;
672 }
673 } else if (!frame_authorized) {
674 printk(KERN_DEBUG "%s: dropped frame from "
675 "unauthorized port (IEEE 802.1X): "
676 "ethertype=0x%04x\n",
677 dev->name, ethertype);
678 goto rx_dropped;
679 }
680 }
681#endif
682
683 /* convert hdr + possible LLC headers into Ethernet header */
684 if (skb->len - hdrlen >= 8 &&
685 ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
686 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
687 memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
688 /* remove RFC1042 or Bridge-Tunnel encapsulation and
689 * replace EtherType */
690 skb_pull(skb, hdrlen + SNAP_SIZE);
691 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
692 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
693 } else {
694 u16 len;
695 /* Leave Ethernet header part of hdr and full payload */
696 skb_pull(skb, hdrlen);
697 len = htons(skb->len);
698 memcpy(skb_push(skb, 2), &len, 2);
699 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
700 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
701 }
702
703#ifdef NOT_YET
704 if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
705 IEEE80211_FCTL_TODS) &&
706 skb->len >= ETH_HLEN + ETH_ALEN) {
707 /* Non-standard frame: get addr4 from its bogus location after
708 * the payload */
709 memcpy(skb->data + ETH_ALEN,
710 skb->data + skb->len - ETH_ALEN, ETH_ALEN);
711 skb_trim(skb, skb->len - ETH_ALEN);
712 }
713#endif
714
715 stats->rx_packets++;
716 stats->rx_bytes += skb->len;
717
718#ifdef NOT_YET
719 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
720 ieee->ap->bridge_packets) {
721 if (dst[0] & 0x01) {
722 /* copy multicast frame both to the higher layers and
723 * to the wireless media */
724 ieee->ap->bridged_multicast++;
725 skb2 = skb_clone(skb, GFP_ATOMIC);
726 if (skb2 == NULL)
727 printk(KERN_DEBUG "%s: skb_clone failed for "
728 "multicast frame\n", dev->name);
729 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
730 /* send frame directly to the associated STA using
731 * wireless media and not passing to higher layers */
732 ieee->ap->bridged_unicast++;
733 skb2 = skb;
734 skb = NULL;
735 }
736 }
737
738 if (skb2 != NULL) {
739 /* send to wireless media */
740 skb2->protocol = __constant_htons(ETH_P_802_3);
741 skb2->mac.raw = skb2->nh.raw = skb2->data;
742 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
743 skb2->dev = dev;
744 dev_queue_xmit(skb2);
745 }
746
747#endif
748
749 if (skb) {
750 skb->protocol = eth_type_trans(skb, dev);
751 memset(skb->cb, 0, sizeof(skb->cb));
752 skb->dev = dev;
753 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
754 netif_rx(skb);
755 }
756
757 rx_exit:
758#ifdef NOT_YET
759 if (sta)
760 hostap_handle_sta_release(sta);
761#endif
762 return 1;
763
764 rx_dropped:
765 stats->rx_dropped++;
766
767 /* Returning 0 indicates to caller that we have not handled the SKB--
768 * so it is still allocated and can be used again by underlying
769 * hardware as a DMA target */
770 return 0;
771}
772
773#define MGMT_FRAME_FIXED_PART_LENGTH 0x24
774
775static inline int ieee80211_is_ofdm_rate(u8 rate)
776{
777 switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
778 case IEEE80211_OFDM_RATE_6MB:
779 case IEEE80211_OFDM_RATE_9MB:
780 case IEEE80211_OFDM_RATE_12MB:
781 case IEEE80211_OFDM_RATE_18MB:
782 case IEEE80211_OFDM_RATE_24MB:
783 case IEEE80211_OFDM_RATE_36MB:
784 case IEEE80211_OFDM_RATE_48MB:
785 case IEEE80211_OFDM_RATE_54MB:
786 return 1;
787 }
788 return 0;
789}
790
791
792static inline int ieee80211_network_init(
793 struct ieee80211_device *ieee,
794 struct ieee80211_probe_response *beacon,
795 struct ieee80211_network *network,
796 struct ieee80211_rx_stats *stats)
797{
798#ifdef CONFIG_IEEE80211_DEBUG
799 char rates_str[64];
800 char *p;
801#endif
802 struct ieee80211_info_element *info_element;
803 u16 left;
804 u8 i;
805
806 /* Pull out fixed field data */
807 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
808 network->capability = beacon->capability;
809 network->last_scanned = jiffies;
810 network->time_stamp[0] = beacon->time_stamp[0];
811 network->time_stamp[1] = beacon->time_stamp[1];
812 network->beacon_interval = beacon->beacon_interval;
813 /* Where to pull this? beacon->listen_interval;*/
814 network->listen_interval = 0x0A;
815 network->rates_len = network->rates_ex_len = 0;
816 network->last_associate = 0;
817 network->ssid_len = 0;
818 network->flags = 0;
819 network->atim_window = 0;
820
821 if (stats->freq == IEEE80211_52GHZ_BAND) {
822 /* for A band (No DS info) */
823 network->channel = stats->received_channel;
824 } else
825 network->flags |= NETWORK_HAS_CCK;
826
827 network->wpa_ie_len = 0;
828 network->rsn_ie_len = 0;
829
830 info_element = &beacon->info_element;
831 left = stats->len - ((void *)info_element - (void *)beacon);
832 while (left >= sizeof(struct ieee80211_info_element_hdr)) {
833 if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) {
834 IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n",
835 info_element->len + sizeof(struct ieee80211_info_element),
836 left);
837 return 1;
838 }
839
840 switch (info_element->id) {
841 case MFIE_TYPE_SSID:
842 if (ieee80211_is_empty_essid(info_element->data,
843 info_element->len)) {
844 network->flags |= NETWORK_EMPTY_ESSID;
845 break;
846 }
847
848 network->ssid_len = min(info_element->len,
849 (u8)IW_ESSID_MAX_SIZE);
850 memcpy(network->ssid, info_element->data, network->ssid_len);
851 if (network->ssid_len < IW_ESSID_MAX_SIZE)
852 memset(network->ssid + network->ssid_len, 0,
853 IW_ESSID_MAX_SIZE - network->ssid_len);
854
855 IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n",
856 network->ssid, network->ssid_len);
857 break;
858
859 case MFIE_TYPE_RATES:
860#ifdef CONFIG_IEEE80211_DEBUG
861 p = rates_str;
862#endif
863 network->rates_len = min(info_element->len, MAX_RATES_LENGTH);
864 for (i = 0; i < network->rates_len; i++) {
865 network->rates[i] = info_element->data[i];
866#ifdef CONFIG_IEEE80211_DEBUG
867 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
868#endif
869 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
870 network->flags |= NETWORK_HAS_OFDM;
871 if (info_element->data[i] &
872 IEEE80211_BASIC_RATE_MASK)
873 network->flags &=
874 ~NETWORK_HAS_CCK;
875 }
876 }
877
878 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n",
879 rates_str, network->rates_len);
880 break;
881
882 case MFIE_TYPE_RATES_EX:
883#ifdef CONFIG_IEEE80211_DEBUG
884 p = rates_str;
885#endif
886 network->rates_ex_len = min(info_element->len, MAX_RATES_EX_LENGTH);
887 for (i = 0; i < network->rates_ex_len; i++) {
888 network->rates_ex[i] = info_element->data[i];
889#ifdef CONFIG_IEEE80211_DEBUG
890 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
891#endif
892 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
893 network->flags |= NETWORK_HAS_OFDM;
894 if (info_element->data[i] &
895 IEEE80211_BASIC_RATE_MASK)
896 network->flags &=
897 ~NETWORK_HAS_CCK;
898 }
899 }
900
901 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
902 rates_str, network->rates_ex_len);
903 break;
904
905 case MFIE_TYPE_DS_SET:
906 IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
907 info_element->data[0]);
908 if (stats->freq == IEEE80211_24GHZ_BAND)
909 network->channel = info_element->data[0];
910 break;
911
912 case MFIE_TYPE_FH_SET:
913 IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
914 break;
915
916 case MFIE_TYPE_CF_SET:
917 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
918 break;
919
920 case MFIE_TYPE_TIM:
921 IEEE80211_DEBUG_SCAN("MFIE_TYPE_TIM: ignored\n");
922 break;
923
924 case MFIE_TYPE_IBSS_SET:
925 IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
926 break;
927
928 case MFIE_TYPE_CHALLENGE:
929 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
930 break;
931
932 case MFIE_TYPE_GENERIC:
933 IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
934 info_element->len);
935 if (info_element->len >= 4 &&
936 info_element->data[0] == 0x00 &&
937 info_element->data[1] == 0x50 &&
938 info_element->data[2] == 0xf2 &&
939 info_element->data[3] == 0x01) {
940 network->wpa_ie_len = min(info_element->len + 2,
941 MAX_WPA_IE_LEN);
942 memcpy(network->wpa_ie, info_element,
943 network->wpa_ie_len);
944 }
945 break;
946
947 case MFIE_TYPE_RSN:
948 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n",
949 info_element->len);
950 network->rsn_ie_len = min(info_element->len + 2,
951 MAX_WPA_IE_LEN);
952 memcpy(network->rsn_ie, info_element,
953 network->rsn_ie_len);
954 break;
955
956 default:
957 IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
958 info_element->id);
959 break;
960 }
961
962 left -= sizeof(struct ieee80211_info_element_hdr) +
963 info_element->len;
964 info_element = (struct ieee80211_info_element *)
965 &info_element->data[info_element->len];
966 }
967
968 network->mode = 0;
969 if (stats->freq == IEEE80211_52GHZ_BAND)
970 network->mode = IEEE_A;
971 else {
972 if (network->flags & NETWORK_HAS_OFDM)
973 network->mode |= IEEE_G;
974 if (network->flags & NETWORK_HAS_CCK)
975 network->mode |= IEEE_B;
976 }
977
978 if (network->mode == 0) {
979 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
980 "network.\n",
981 escape_essid(network->ssid,
982 network->ssid_len),
983 MAC_ARG(network->bssid));
984 return 1;
985 }
986
987 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
988 network->flags |= NETWORK_EMPTY_ESSID;
989
990 memcpy(&network->stats, stats, sizeof(network->stats));
991
992 return 0;
993}
994
995static inline int is_same_network(struct ieee80211_network *src,
996 struct ieee80211_network *dst)
997{
998 /* A network is only a duplicate if the channel, BSSID, and ESSID
999 * all match. We treat all <hidden> with the same BSSID and channel
1000 * as one network */
1001 return ((src->ssid_len == dst->ssid_len) &&
1002 (src->channel == dst->channel) &&
1003 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
1004 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1005}
1006
1007static inline void update_network(struct ieee80211_network *dst,
1008 struct ieee80211_network *src)
1009{
1010 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
1011 dst->capability = src->capability;
1012 memcpy(dst->rates, src->rates, src->rates_len);
1013 dst->rates_len = src->rates_len;
1014 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1015 dst->rates_ex_len = src->rates_ex_len;
1016
1017 dst->mode = src->mode;
1018 dst->flags = src->flags;
1019 dst->time_stamp[0] = src->time_stamp[0];
1020 dst->time_stamp[1] = src->time_stamp[1];
1021
1022 dst->beacon_interval = src->beacon_interval;
1023 dst->listen_interval = src->listen_interval;
1024 dst->atim_window = src->atim_window;
1025
1026 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1027 dst->wpa_ie_len = src->wpa_ie_len;
1028 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1029 dst->rsn_ie_len = src->rsn_ie_len;
1030
1031 dst->last_scanned = jiffies;
1032 /* dst->last_associate is not overwritten */
1033}
1034
1035static inline void ieee80211_process_probe_response(
1036 struct ieee80211_device *ieee,
1037 struct ieee80211_probe_response *beacon,
1038 struct ieee80211_rx_stats *stats)
1039{
1040 struct ieee80211_network network;
1041 struct ieee80211_network *target;
1042 struct ieee80211_network *oldest = NULL;
1043#ifdef CONFIG_IEEE80211_DEBUG
1044 struct ieee80211_info_element *info_element = &beacon->info_element;
1045#endif
1046 unsigned long flags;
1047
1048 IEEE80211_DEBUG_SCAN(
1049 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1050 escape_essid(info_element->data, info_element->len),
1051 MAC_ARG(beacon->header.addr3),
1052 (beacon->capability & (1<<0xf)) ? '1' : '0',
1053 (beacon->capability & (1<<0xe)) ? '1' : '0',
1054 (beacon->capability & (1<<0xd)) ? '1' : '0',
1055 (beacon->capability & (1<<0xc)) ? '1' : '0',
1056 (beacon->capability & (1<<0xb)) ? '1' : '0',
1057 (beacon->capability & (1<<0xa)) ? '1' : '0',
1058 (beacon->capability & (1<<0x9)) ? '1' : '0',
1059 (beacon->capability & (1<<0x8)) ? '1' : '0',
1060 (beacon->capability & (1<<0x7)) ? '1' : '0',
1061 (beacon->capability & (1<<0x6)) ? '1' : '0',
1062 (beacon->capability & (1<<0x5)) ? '1' : '0',
1063 (beacon->capability & (1<<0x4)) ? '1' : '0',
1064 (beacon->capability & (1<<0x3)) ? '1' : '0',
1065 (beacon->capability & (1<<0x2)) ? '1' : '0',
1066 (beacon->capability & (1<<0x1)) ? '1' : '0',
1067 (beacon->capability & (1<<0x0)) ? '1' : '0');
1068
1069 if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1070 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1071 escape_essid(info_element->data,
1072 info_element->len),
1073 MAC_ARG(beacon->header.addr3),
1074 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1075 IEEE80211_STYPE_PROBE_RESP ?
1076 "PROBE RESPONSE" : "BEACON");
1077 return;
1078 }
1079
1080 /* The network parsed correctly -- so now we scan our known networks
1081 * to see if we can find it in our list.
1082 *
1083 * NOTE: This search is definitely not optimized. Once its doing
1084 * the "right thing" we'll optimize it for efficiency if
1085 * necessary */
1086
1087 /* Search for this entry in the list and update it if it is
1088 * already there. */
1089
1090 spin_lock_irqsave(&ieee->lock, flags);
1091
1092 list_for_each_entry(target, &ieee->network_list, list) {
1093 if (is_same_network(target, &network))
1094 break;
1095
1096 if ((oldest == NULL) ||
1097 (target->last_scanned < oldest->last_scanned))
1098 oldest = target;
1099 }
1100
1101 /* If we didn't find a match, then get a new network slot to initialize
1102 * with this beacon's information */
1103 if (&target->list == &ieee->network_list) {
1104 if (list_empty(&ieee->network_free_list)) {
1105 /* If there are no more slots, expire the oldest */
1106 list_del(&oldest->list);
1107 target = oldest;
1108 IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1109 "network list.\n",
1110 escape_essid(target->ssid,
1111 target->ssid_len),
1112 MAC_ARG(target->bssid));
1113 } else {
1114 /* Otherwise just pull from the free list */
1115 target = list_entry(ieee->network_free_list.next,
1116 struct ieee80211_network, list);
1117 list_del(ieee->network_free_list.next);
1118 }
1119
1120
1121#ifdef CONFIG_IEEE80211_DEBUG
1122 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1123 escape_essid(network.ssid,
1124 network.ssid_len),
1125 MAC_ARG(network.bssid),
1126 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1127 IEEE80211_STYPE_PROBE_RESP ?
1128 "PROBE RESPONSE" : "BEACON");
1129#endif
1130 memcpy(target, &network, sizeof(*target));
1131 list_add_tail(&target->list, &ieee->network_list);
1132 } else {
1133 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1134 escape_essid(target->ssid,
1135 target->ssid_len),
1136 MAC_ARG(target->bssid),
1137 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1138 IEEE80211_STYPE_PROBE_RESP ?
1139 "PROBE RESPONSE" : "BEACON");
1140 update_network(target, &network);
1141 }
1142
1143 spin_unlock_irqrestore(&ieee->lock, flags);
1144}
1145
1146void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1147 struct ieee80211_hdr *header,
1148 struct ieee80211_rx_stats *stats)
1149{
1150 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
1151 case IEEE80211_STYPE_ASSOC_RESP:
1152 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1153 WLAN_FC_GET_STYPE(header->frame_ctl));
1154 break;
1155
1156 case IEEE80211_STYPE_REASSOC_RESP:
1157 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1158 WLAN_FC_GET_STYPE(header->frame_ctl));
1159 break;
1160
1161 case IEEE80211_STYPE_PROBE_RESP:
1162 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1163 WLAN_FC_GET_STYPE(header->frame_ctl));
1164 IEEE80211_DEBUG_SCAN("Probe response\n");
1165 ieee80211_process_probe_response(
1166 ieee, (struct ieee80211_probe_response *)header, stats);
1167 break;
1168
1169 case IEEE80211_STYPE_BEACON:
1170 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1171 WLAN_FC_GET_STYPE(header->frame_ctl));
1172 IEEE80211_DEBUG_SCAN("Beacon\n");
1173 ieee80211_process_probe_response(
1174 ieee, (struct ieee80211_probe_response *)header, stats);
1175 break;
1176
1177 default:
1178 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1179 WLAN_FC_GET_STYPE(header->frame_ctl));
1180 IEEE80211_WARNING("%s: Unknown management packet: %d\n",
1181 ieee->dev->name,
1182 WLAN_FC_GET_STYPE(header->frame_ctl));
1183 break;
1184 }
1185}
1186
1187
1188EXPORT_SYMBOL(ieee80211_rx_mgt);
1189EXPORT_SYMBOL(ieee80211_rx);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 22:06:44 -0500