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authorJeff Garzik <jgarzik@pobox.com>2005-05-12 22:48:20 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-05-12 22:48:20 -0400
commitb453872c35cfcbdbf5a794737817f7d4e7b1b579 (patch)
tree6639da0b12e3f071b57f388c97d28e451f8f3cd3 /net/ieee80211/ieee80211_rx.c
parentfff9cfd99c0f88645c3f50d7476d6c8cef99f140 (diff)
[NET] ieee80211 subsystem
Contributors: Host AP contributors James Ketrenos <jketreno@linux.intel.com> Francois Romieu <romieu@fr.zoreil.com> Adrian Bunk <bunk@stusta.de> Matthew Galgoci <mgalgoci@parcelfarce.linux.th eplanet.co.uk>
Diffstat (limited to 'net/ieee80211/ieee80211_rx.c')
-rw-r--r--net/ieee80211/ieee80211_rx.c1206
1 files changed, 1206 insertions, 0 deletions
diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
new file mode 100644
index 000000000000..2bda8a174818
--- /dev/null
+++ b/net/ieee80211/ieee80211_rx.c
@@ -0,0 +1,1206 @@
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/pci.h>
27#include <linux/proc_fs.h>
28#include <linux/skbuff.h>
29#include <linux/slab.h>
30#include <linux/tcp.h>
31#include <linux/types.h>
32#include <linux/version.h>
33#include <linux/wireless.h>
34#include <linux/etherdevice.h>
35#include <asm/uaccess.h>
36#include <linux/ctype.h>
37
38#include <net/ieee80211.h>
39
40static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
41 struct sk_buff *skb,
42 struct ieee80211_rx_stats *rx_stats)
43{
44 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
45 u16 fc = le16_to_cpu(hdr->frame_ctl);
46
47 skb->dev = ieee->dev;
48 skb->mac.raw = skb->data;
49 skb_pull(skb, ieee80211_get_hdrlen(fc));
50 skb->pkt_type = PACKET_OTHERHOST;
51 skb->protocol = __constant_htons(ETH_P_80211_RAW);
52 memset(skb->cb, 0, sizeof(skb->cb));
53 netif_rx(skb);
54}
55
56
57/* Called only as a tasklet (software IRQ) */
58static struct ieee80211_frag_entry *
59ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
60 unsigned int frag, u8 *src, u8 *dst)
61{
62 struct ieee80211_frag_entry *entry;
63 int i;
64
65 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
66 entry = &ieee->frag_cache[i];
67 if (entry->skb != NULL &&
68 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
69 IEEE80211_DEBUG_FRAG(
70 "expiring fragment cache entry "
71 "seq=%u last_frag=%u\n",
72 entry->seq, entry->last_frag);
73 dev_kfree_skb_any(entry->skb);
74 entry->skb = NULL;
75 }
76
77 if (entry->skb != NULL && entry->seq == seq &&
78 (entry->last_frag + 1 == frag || frag == -1) &&
79 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
80 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
81 return entry;
82 }
83
84 return NULL;
85}
86
87/* Called only as a tasklet (software IRQ) */
88static struct sk_buff *
89ieee80211_frag_cache_get(struct ieee80211_device *ieee,
90 struct ieee80211_hdr *hdr)
91{
92 struct sk_buff *skb = NULL;
93 u16 sc;
94 unsigned int frag, seq;
95 struct ieee80211_frag_entry *entry;
96
97 sc = le16_to_cpu(hdr->seq_ctl);
98 frag = WLAN_GET_SEQ_FRAG(sc);
99 seq = WLAN_GET_SEQ_SEQ(sc);
100
101 if (frag == 0) {
102 /* Reserve enough space to fit maximum frame length */
103 skb = dev_alloc_skb(ieee->dev->mtu +
104 sizeof(struct ieee80211_hdr) +
105 8 /* LLC */ +
106 2 /* alignment */ +
107 8 /* WEP */ + ETH_ALEN /* WDS */);
108 if (skb == NULL)
109 return NULL;
110
111 entry = &ieee->frag_cache[ieee->frag_next_idx];
112 ieee->frag_next_idx++;
113 if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
114 ieee->frag_next_idx = 0;
115
116 if (entry->skb != NULL)
117 dev_kfree_skb_any(entry->skb);
118
119 entry->first_frag_time = jiffies;
120 entry->seq = seq;
121 entry->last_frag = frag;
122 entry->skb = skb;
123 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
124 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
125 } else {
126 /* received a fragment of a frame for which the head fragment
127 * should have already been received */
128 entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
129 hdr->addr1);
130 if (entry != NULL) {
131 entry->last_frag = frag;
132 skb = entry->skb;
133 }
134 }
135
136 return skb;
137}
138
139
140/* Called only as a tasklet (software IRQ) */
141static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
142 struct ieee80211_hdr *hdr)
143{
144 u16 sc;
145 unsigned int seq;
146 struct ieee80211_frag_entry *entry;
147
148 sc = le16_to_cpu(hdr->seq_ctl);
149 seq = WLAN_GET_SEQ_SEQ(sc);
150
151 entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
152 hdr->addr1);
153
154 if (entry == NULL) {
155 IEEE80211_DEBUG_FRAG(
156 "could not invalidate fragment cache "
157 "entry (seq=%u)\n", seq);
158 return -1;
159 }
160
161 entry->skb = NULL;
162 return 0;
163}
164
165
166#ifdef NOT_YET
167/* ieee80211_rx_frame_mgtmt
168 *
169 * Responsible for handling management control frames
170 *
171 * Called by ieee80211_rx */
172static inline int
173ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
174 struct ieee80211_rx_stats *rx_stats, u16 type,
175 u16 stype)
176{
177 if (ieee->iw_mode == IW_MODE_MASTER) {
178 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
179 ieee->dev->name);
180 return 0;
181/*
182 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr *)
183 skb->data);*/
184 }
185
186 if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
187 if (stype == WLAN_FC_STYPE_BEACON &&
188 ieee->iw_mode == IW_MODE_MASTER) {
189 struct sk_buff *skb2;
190 /* Process beacon frames also in kernel driver to
191 * update STA(AP) table statistics */
192 skb2 = skb_clone(skb, GFP_ATOMIC);
193 if (skb2)
194 hostap_rx(skb2->dev, skb2, rx_stats);
195 }
196
197 /* send management frames to the user space daemon for
198 * processing */
199 ieee->apdevstats.rx_packets++;
200 ieee->apdevstats.rx_bytes += skb->len;
201 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
202 return 0;
203 }
204
205 if (ieee->iw_mode == IW_MODE_MASTER) {
206 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
207 printk(KERN_DEBUG "%s: unknown management frame "
208 "(type=0x%02x, stype=0x%02x) dropped\n",
209 skb->dev->name, type, stype);
210 return -1;
211 }
212
213 hostap_rx(skb->dev, skb, rx_stats);
214 return 0;
215 }
216
217 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
218 "received in non-Host AP mode\n", skb->dev->name);
219 return -1;
220}
221#endif
222
223
224/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
225/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
226static unsigned char rfc1042_header[] =
227{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
228/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
229static unsigned char bridge_tunnel_header[] =
230{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
231/* No encapsulation header if EtherType < 0x600 (=length) */
232
233/* Called by ieee80211_rx_frame_decrypt */
234static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
235 struct sk_buff *skb)
236{
237 struct net_device *dev = ieee->dev;
238 u16 fc, ethertype;
239 struct ieee80211_hdr *hdr;
240 u8 *pos;
241
242 if (skb->len < 24)
243 return 0;
244
245 hdr = (struct ieee80211_hdr *) skb->data;
246 fc = le16_to_cpu(hdr->frame_ctl);
247
248 /* check that the frame is unicast frame to us */
249 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
250 IEEE80211_FCTL_TODS &&
251 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
252 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
253 /* ToDS frame with own addr BSSID and DA */
254 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
255 IEEE80211_FCTL_FROMDS &&
256 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
257 /* FromDS frame with own addr as DA */
258 } else
259 return 0;
260
261 if (skb->len < 24 + 8)
262 return 0;
263
264 /* check for port access entity Ethernet type */
265 pos = skb->data + 24;
266 ethertype = (pos[6] << 8) | pos[7];
267 if (ethertype == ETH_P_PAE)
268 return 1;
269
270 return 0;
271}
272
273/* Called only as a tasklet (software IRQ), by ieee80211_rx */
274static inline int
275ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
276 struct ieee80211_crypt_data *crypt)
277{
278 struct ieee80211_hdr *hdr;
279 int res, hdrlen;
280
281 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
282 return 0;
283
284 hdr = (struct ieee80211_hdr *) skb->data;
285 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
286
287#ifdef CONFIG_IEEE80211_CRYPT_TKIP
288 if (ieee->tkip_countermeasures &&
289 strcmp(crypt->ops->name, "TKIP") == 0) {
290 if (net_ratelimit()) {
291 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
292 "received packet from " MAC_FMT "\n",
293 ieee->dev->name, MAC_ARG(hdr->addr2));
294 }
295 return -1;
296 }
297#endif
298
299 atomic_inc(&crypt->refcnt);
300 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
301 atomic_dec(&crypt->refcnt);
302 if (res < 0) {
303 IEEE80211_DEBUG_DROP(
304 "decryption failed (SA=" MAC_FMT
305 ") res=%d\n", MAC_ARG(hdr->addr2), res);
306 if (res == -2)
307 IEEE80211_DEBUG_DROP("Decryption failed ICV "
308 "mismatch (key %d)\n",
309 skb->data[hdrlen + 3] >> 6);
310 ieee->ieee_stats.rx_discards_undecryptable++;
311 return -1;
312 }
313
314 return res;
315}
316
317
318/* Called only as a tasklet (software IRQ), by ieee80211_rx */
319static inline int
320ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
321 int keyidx, struct ieee80211_crypt_data *crypt)
322{
323 struct ieee80211_hdr *hdr;
324 int res, hdrlen;
325
326 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
327 return 0;
328
329 hdr = (struct ieee80211_hdr *) skb->data;
330 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
331
332 atomic_inc(&crypt->refcnt);
333 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
334 atomic_dec(&crypt->refcnt);
335 if (res < 0) {
336 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
337 " (SA=" MAC_FMT " keyidx=%d)\n",
338 ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
339 return -1;
340 }
341
342 return 0;
343}
344
345
346/* All received frames are sent to this function. @skb contains the frame in
347 * IEEE 802.11 format, i.e., in the format it was sent over air.
348 * This function is called only as a tasklet (software IRQ). */
349int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
350 struct ieee80211_rx_stats *rx_stats)
351{
352 struct net_device *dev = ieee->dev;
353 struct ieee80211_hdr *hdr;
354 size_t hdrlen;
355 u16 fc, type, stype, sc;
356 struct net_device_stats *stats;
357 unsigned int frag;
358 u8 *payload;
359 u16 ethertype;
360#ifdef NOT_YET
361 struct net_device *wds = NULL;
362 struct sk_buff *skb2 = NULL;
363 struct net_device *wds = NULL;
364 int frame_authorized = 0;
365 int from_assoc_ap = 0;
366 void *sta = NULL;
367#endif
368 u8 dst[ETH_ALEN];
369 u8 src[ETH_ALEN];
370 struct ieee80211_crypt_data *crypt = NULL;
371 int keyidx = 0;
372
373 hdr = (struct ieee80211_hdr *)skb->data;
374 stats = &ieee->stats;
375
376 if (skb->len < 10) {
377 printk(KERN_INFO "%s: SKB length < 10\n",
378 dev->name);
379 goto rx_dropped;
380 }
381
382 fc = le16_to_cpu(hdr->frame_ctl);
383 type = WLAN_FC_GET_TYPE(fc);
384 stype = WLAN_FC_GET_STYPE(fc);
385 sc = le16_to_cpu(hdr->seq_ctl);
386 frag = WLAN_GET_SEQ_FRAG(sc);
387 hdrlen = ieee80211_get_hdrlen(fc);
388
389#ifdef NOT_YET
390#if WIRELESS_EXT > 15
391 /* Put this code here so that we avoid duplicating it in all
392 * Rx paths. - Jean II */
393#ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
394 /* If spy monitoring on */
395 if (iface->spy_data.spy_number > 0) {
396 struct iw_quality wstats;
397 wstats.level = rx_stats->signal;
398 wstats.noise = rx_stats->noise;
399 wstats.updated = 6; /* No qual value */
400 /* Update spy records */
401 wireless_spy_update(dev, hdr->addr2, &wstats);
402 }
403#endif /* IW_WIRELESS_SPY */
404#endif /* WIRELESS_EXT > 15 */
405 hostap_update_rx_stats(local->ap, hdr, rx_stats);
406#endif
407
408#if WIRELESS_EXT > 15
409 if (ieee->iw_mode == IW_MODE_MONITOR) {
410 ieee80211_monitor_rx(ieee, skb, rx_stats);
411 stats->rx_packets++;
412 stats->rx_bytes += skb->len;
413 return 1;
414 }
415#endif
416
417 if (ieee->host_decrypt) {
418 int idx = 0;
419 if (skb->len >= hdrlen + 3)
420 idx = skb->data[hdrlen + 3] >> 6;
421 crypt = ieee->crypt[idx];
422#ifdef NOT_YET
423 sta = NULL;
424
425 /* Use station specific key to override default keys if the
426 * receiver address is a unicast address ("individual RA"). If
427 * bcrx_sta_key parameter is set, station specific key is used
428 * even with broad/multicast targets (this is against IEEE
429 * 802.11, but makes it easier to use different keys with
430 * stations that do not support WEP key mapping). */
431
432 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
433 (void) hostap_handle_sta_crypto(local, hdr, &crypt,
434 &sta);
435#endif
436
437 /* allow NULL decrypt to indicate an station specific override
438 * for default encryption */
439 if (crypt && (crypt->ops == NULL ||
440 crypt->ops->decrypt_mpdu == NULL))
441 crypt = NULL;
442
443 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
444 /* This seems to be triggered by some (multicast?)
445 * frames from other than current BSS, so just drop the
446 * frames silently instead of filling system log with
447 * these reports. */
448 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
449 " (SA=" MAC_FMT ")\n",
450 MAC_ARG(hdr->addr2));
451 ieee->ieee_stats.rx_discards_undecryptable++;
452 goto rx_dropped;
453 }
454 }
455
456#ifdef NOT_YET
457 if (type != WLAN_FC_TYPE_DATA) {
458 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
459 fc & IEEE80211_FCTL_WEP && ieee->host_decrypt &&
460 (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0)
461 {
462 printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
463 "from " MAC_FMT "\n", dev->name,
464 MAC_ARG(hdr->addr2));
465 /* TODO: could inform hostapd about this so that it
466 * could send auth failure report */
467 goto rx_dropped;
468 }
469
470 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
471 goto rx_dropped;
472 else
473 goto rx_exit;
474 }
475#endif
476
477 /* Data frame - extract src/dst addresses */
478 if (skb->len < IEEE80211_DATA_HDR3_LEN)
479 goto rx_dropped;
480
481 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
482 case IEEE80211_FCTL_FROMDS:
483 memcpy(dst, hdr->addr1, ETH_ALEN);
484 memcpy(src, hdr->addr3, ETH_ALEN);
485 break;
486 case IEEE80211_FCTL_TODS:
487 memcpy(dst, hdr->addr3, ETH_ALEN);
488 memcpy(src, hdr->addr2, ETH_ALEN);
489 break;
490 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
491 if (skb->len < IEEE80211_DATA_HDR4_LEN)
492 goto rx_dropped;
493 memcpy(dst, hdr->addr3, ETH_ALEN);
494 memcpy(src, hdr->addr4, ETH_ALEN);
495 break;
496 case 0:
497 memcpy(dst, hdr->addr1, ETH_ALEN);
498 memcpy(src, hdr->addr2, ETH_ALEN);
499 break;
500 }
501
502#ifdef NOT_YET
503 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
504 goto rx_dropped;
505 if (wds) {
506 skb->dev = dev = wds;
507 stats = hostap_get_stats(dev);
508 }
509
510 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
511 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
512 ieee->stadev &&
513 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
514 /* Frame from BSSID of the AP for which we are a client */
515 skb->dev = dev = ieee->stadev;
516 stats = hostap_get_stats(dev);
517 from_assoc_ap = 1;
518 }
519#endif
520
521 dev->last_rx = jiffies;
522
523#ifdef NOT_YET
524 if ((ieee->iw_mode == IW_MODE_MASTER ||
525 ieee->iw_mode == IW_MODE_REPEAT) &&
526 !from_assoc_ap) {
527 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
528 wds != NULL)) {
529 case AP_RX_CONTINUE_NOT_AUTHORIZED:
530 frame_authorized = 0;
531 break;
532 case AP_RX_CONTINUE:
533 frame_authorized = 1;
534 break;
535 case AP_RX_DROP:
536 goto rx_dropped;
537 case AP_RX_EXIT:
538 goto rx_exit;
539 }
540 }
541#endif
542
543 /* Nullfunc frames may have PS-bit set, so they must be passed to
544 * hostap_handle_sta_rx() before being dropped here. */
545 if (stype != IEEE80211_STYPE_DATA &&
546 stype != IEEE80211_STYPE_DATA_CFACK &&
547 stype != IEEE80211_STYPE_DATA_CFPOLL &&
548 stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
549 if (stype != IEEE80211_STYPE_NULLFUNC)
550 IEEE80211_DEBUG_DROP(
551 "RX: dropped data frame "
552 "with no data (type=0x%02x, "
553 "subtype=0x%02x, len=%d)\n",
554 type, stype, skb->len);
555 goto rx_dropped;
556 }
557
558 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
559
560 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
561 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
562 goto rx_dropped;
563
564 hdr = (struct ieee80211_hdr *) skb->data;
565
566 /* skb: hdr + (possibly fragmented) plaintext payload */
567 // PR: FIXME: hostap has additional conditions in the "if" below:
568 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
569 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
570 int flen;
571 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
572 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
573
574 if (!frag_skb) {
575 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
576 "Rx cannot get skb from fragment "
577 "cache (morefrag=%d seq=%u frag=%u)\n",
578 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
579 WLAN_GET_SEQ_SEQ(sc), frag);
580 goto rx_dropped;
581 }
582
583 flen = skb->len;
584 if (frag != 0)
585 flen -= hdrlen;
586
587 if (frag_skb->tail + flen > frag_skb->end) {
588 printk(KERN_WARNING "%s: host decrypted and "
589 "reassembled frame did not fit skb\n",
590 dev->name);
591 ieee80211_frag_cache_invalidate(ieee, hdr);
592 goto rx_dropped;
593 }
594
595 if (frag == 0) {
596 /* copy first fragment (including full headers) into
597 * beginning of the fragment cache skb */
598 memcpy(skb_put(frag_skb, flen), skb->data, flen);
599 } else {
600 /* append frame payload to the end of the fragment
601 * cache skb */
602 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
603 flen);
604 }
605 dev_kfree_skb_any(skb);
606 skb = NULL;
607
608 if (fc & IEEE80211_FCTL_MOREFRAGS) {
609 /* more fragments expected - leave the skb in fragment
610 * cache for now; it will be delivered to upper layers
611 * after all fragments have been received */
612 goto rx_exit;
613 }
614
615 /* this was the last fragment and the frame will be
616 * delivered, so remove skb from fragment cache */
617 skb = frag_skb;
618 hdr = (struct ieee80211_hdr *) skb->data;
619 ieee80211_frag_cache_invalidate(ieee, hdr);
620 }
621
622 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
623 * encrypted/authenticated */
624 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
625 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
626 goto rx_dropped;
627
628 hdr = (struct ieee80211_hdr *) skb->data;
629 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
630 if (/*ieee->ieee802_1x &&*/
631 ieee80211_is_eapol_frame(ieee, skb)) {
632#ifdef CONFIG_IEEE80211_DEBUG
633 /* pass unencrypted EAPOL frames even if encryption is
634 * configured */
635 struct eapol *eap = (struct eapol *)(skb->data +
636 24);
637 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
638 eap_get_type(eap->type));
639#endif
640 } else {
641 IEEE80211_DEBUG_DROP(
642 "encryption configured, but RX "
643 "frame not encrypted (SA=" MAC_FMT ")\n",
644 MAC_ARG(hdr->addr2));
645 goto rx_dropped;
646 }
647 }
648
649#ifdef CONFIG_IEEE80211_DEBUG
650 if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
651 ieee80211_is_eapol_frame(ieee, skb)) {
652 struct eapol *eap = (struct eapol *)(skb->data +
653 24);
654 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
655 eap_get_type(eap->type));
656 }
657#endif
658
659 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
660 !ieee80211_is_eapol_frame(ieee, skb)) {
661 IEEE80211_DEBUG_DROP(
662 "dropped unencrypted RX data "
663 "frame from " MAC_FMT
664 " (drop_unencrypted=1)\n",
665 MAC_ARG(hdr->addr2));
666 goto rx_dropped;
667 }
668
669 /* skb: hdr + (possible reassembled) full plaintext payload */
670
671 payload = skb->data + hdrlen;
672 ethertype = (payload[6] << 8) | payload[7];
673
674#ifdef NOT_YET
675 /* If IEEE 802.1X is used, check whether the port is authorized to send
676 * the received frame. */
677 if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
678 if (ethertype == ETH_P_PAE) {
679 printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
680 dev->name);
681 if (ieee->hostapd && ieee->apdev) {
682 /* Send IEEE 802.1X frames to the user
683 * space daemon for processing */
684 prism2_rx_80211(ieee->apdev, skb, rx_stats,
685 PRISM2_RX_MGMT);
686 ieee->apdevstats.rx_packets++;
687 ieee->apdevstats.rx_bytes += skb->len;
688 goto rx_exit;
689 }
690 } else if (!frame_authorized) {
691 printk(KERN_DEBUG "%s: dropped frame from "
692 "unauthorized port (IEEE 802.1X): "
693 "ethertype=0x%04x\n",
694 dev->name, ethertype);
695 goto rx_dropped;
696 }
697 }
698#endif
699
700 /* convert hdr + possible LLC headers into Ethernet header */
701 if (skb->len - hdrlen >= 8 &&
702 ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
703 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
704 memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
705 /* remove RFC1042 or Bridge-Tunnel encapsulation and
706 * replace EtherType */
707 skb_pull(skb, hdrlen + SNAP_SIZE);
708 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
709 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
710 } else {
711 u16 len;
712 /* Leave Ethernet header part of hdr and full payload */
713 skb_pull(skb, hdrlen);
714 len = htons(skb->len);
715 memcpy(skb_push(skb, 2), &len, 2);
716 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
717 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
718 }
719
720#ifdef NOT_YET
721 if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
722 IEEE80211_FCTL_TODS) &&
723 skb->len >= ETH_HLEN + ETH_ALEN) {
724 /* Non-standard frame: get addr4 from its bogus location after
725 * the payload */
726 memcpy(skb->data + ETH_ALEN,
727 skb->data + skb->len - ETH_ALEN, ETH_ALEN);
728 skb_trim(skb, skb->len - ETH_ALEN);
729 }
730#endif
731
732 stats->rx_packets++;
733 stats->rx_bytes += skb->len;
734
735#ifdef NOT_YET
736 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
737 ieee->ap->bridge_packets) {
738 if (dst[0] & 0x01) {
739 /* copy multicast frame both to the higher layers and
740 * to the wireless media */
741 ieee->ap->bridged_multicast++;
742 skb2 = skb_clone(skb, GFP_ATOMIC);
743 if (skb2 == NULL)
744 printk(KERN_DEBUG "%s: skb_clone failed for "
745 "multicast frame\n", dev->name);
746 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
747 /* send frame directly to the associated STA using
748 * wireless media and not passing to higher layers */
749 ieee->ap->bridged_unicast++;
750 skb2 = skb;
751 skb = NULL;
752 }
753 }
754
755 if (skb2 != NULL) {
756 /* send to wireless media */
757 skb2->protocol = __constant_htons(ETH_P_802_3);
758 skb2->mac.raw = skb2->nh.raw = skb2->data;
759 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
760 skb2->dev = dev;
761 dev_queue_xmit(skb2);
762 }
763
764#endif
765
766 if (skb) {
767 skb->protocol = eth_type_trans(skb, dev);
768 memset(skb->cb, 0, sizeof(skb->cb));
769 skb->dev = dev;
770 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
771 netif_rx(skb);
772 }
773
774 rx_exit:
775#ifdef NOT_YET
776 if (sta)
777 hostap_handle_sta_release(sta);
778#endif
779 return 1;
780
781 rx_dropped:
782 stats->rx_dropped++;
783
784 /* Returning 0 indicates to caller that we have not handled the SKB--
785 * so it is still allocated and can be used again by underlying
786 * hardware as a DMA target */
787 return 0;
788}
789
790#define MGMT_FRAME_FIXED_PART_LENGTH 0x24
791
792static inline int ieee80211_is_ofdm_rate(u8 rate)
793{
794 switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
795 case IEEE80211_OFDM_RATE_6MB:
796 case IEEE80211_OFDM_RATE_9MB:
797 case IEEE80211_OFDM_RATE_12MB:
798 case IEEE80211_OFDM_RATE_18MB:
799 case IEEE80211_OFDM_RATE_24MB:
800 case IEEE80211_OFDM_RATE_36MB:
801 case IEEE80211_OFDM_RATE_48MB:
802 case IEEE80211_OFDM_RATE_54MB:
803 return 1;
804 }
805 return 0;
806}
807
808
809static inline int ieee80211_network_init(
810 struct ieee80211_device *ieee,
811 struct ieee80211_probe_response *beacon,
812 struct ieee80211_network *network,
813 struct ieee80211_rx_stats *stats)
814{
815#ifdef CONFIG_IEEE80211_DEBUG
816 char rates_str[64];
817 char *p;
818#endif
819 struct ieee80211_info_element *info_element;
820 u16 left;
821 u8 i;
822
823 /* Pull out fixed field data */
824 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
825 network->capability = beacon->capability;
826 network->last_scanned = jiffies;
827 network->time_stamp[0] = beacon->time_stamp[0];
828 network->time_stamp[1] = beacon->time_stamp[1];
829 network->beacon_interval = beacon->beacon_interval;
830 /* Where to pull this? beacon->listen_interval;*/
831 network->listen_interval = 0x0A;
832 network->rates_len = network->rates_ex_len = 0;
833 network->last_associate = 0;
834 network->ssid_len = 0;
835 network->flags = 0;
836 network->atim_window = 0;
837
838 if (stats->freq == IEEE80211_52GHZ_BAND) {
839 /* for A band (No DS info) */
840 network->channel = stats->received_channel;
841 } else
842 network->flags |= NETWORK_HAS_CCK;
843
844 network->wpa_ie_len = 0;
845 network->rsn_ie_len = 0;
846
847 info_element = &beacon->info_element;
848 left = stats->len - ((void *)info_element - (void *)beacon);
849 while (left >= sizeof(struct ieee80211_info_element_hdr)) {
850 if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) {
851 IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n",
852 info_element->len + sizeof(struct ieee80211_info_element),
853 left);
854 return 1;
855 }
856
857 switch (info_element->id) {
858 case MFIE_TYPE_SSID:
859 if (ieee80211_is_empty_essid(info_element->data,
860 info_element->len)) {
861 network->flags |= NETWORK_EMPTY_ESSID;
862 break;
863 }
864
865 network->ssid_len = min(info_element->len,
866 (u8)IW_ESSID_MAX_SIZE);
867 memcpy(network->ssid, info_element->data, network->ssid_len);
868 if (network->ssid_len < IW_ESSID_MAX_SIZE)
869 memset(network->ssid + network->ssid_len, 0,
870 IW_ESSID_MAX_SIZE - network->ssid_len);
871
872 IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n",
873 network->ssid, network->ssid_len);
874 break;
875
876 case MFIE_TYPE_RATES:
877#ifdef CONFIG_IEEE80211_DEBUG
878 p = rates_str;
879#endif
880 network->rates_len = min(info_element->len, MAX_RATES_LENGTH);
881 for (i = 0; i < network->rates_len; i++) {
882 network->rates[i] = info_element->data[i];
883#ifdef CONFIG_IEEE80211_DEBUG
884 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
885#endif
886 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
887 network->flags |= NETWORK_HAS_OFDM;
888 if (info_element->data[i] &
889 IEEE80211_BASIC_RATE_MASK)
890 network->flags &=
891 ~NETWORK_HAS_CCK;
892 }
893 }
894
895 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n",
896 rates_str, network->rates_len);
897 break;
898
899 case MFIE_TYPE_RATES_EX:
900#ifdef CONFIG_IEEE80211_DEBUG
901 p = rates_str;
902#endif
903 network->rates_ex_len = min(info_element->len, MAX_RATES_EX_LENGTH);
904 for (i = 0; i < network->rates_ex_len; i++) {
905 network->rates_ex[i] = info_element->data[i];
906#ifdef CONFIG_IEEE80211_DEBUG
907 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
908#endif
909 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
910 network->flags |= NETWORK_HAS_OFDM;
911 if (info_element->data[i] &
912 IEEE80211_BASIC_RATE_MASK)
913 network->flags &=
914 ~NETWORK_HAS_CCK;
915 }
916 }
917
918 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
919 rates_str, network->rates_ex_len);
920 break;
921
922 case MFIE_TYPE_DS_SET:
923 IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
924 info_element->data[0]);
925 if (stats->freq == IEEE80211_24GHZ_BAND)
926 network->channel = info_element->data[0];
927 break;
928
929 case MFIE_TYPE_FH_SET:
930 IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
931 break;
932
933 case MFIE_TYPE_CF_SET:
934 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
935 break;
936
937 case MFIE_TYPE_TIM:
938 IEEE80211_DEBUG_SCAN("MFIE_TYPE_TIM: ignored\n");
939 break;
940
941 case MFIE_TYPE_IBSS_SET:
942 IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
943 break;
944
945 case MFIE_TYPE_CHALLENGE:
946 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
947 break;
948
949 case MFIE_TYPE_GENERIC:
950 IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
951 info_element->len);
952 if (info_element->len >= 4 &&
953 info_element->data[0] == 0x00 &&
954 info_element->data[1] == 0x50 &&
955 info_element->data[2] == 0xf2 &&
956 info_element->data[3] == 0x01) {
957 network->wpa_ie_len = min(info_element->len + 2,
958 MAX_WPA_IE_LEN);
959 memcpy(network->wpa_ie, info_element,
960 network->wpa_ie_len);
961 }
962 break;
963
964 case MFIE_TYPE_RSN:
965 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n",
966 info_element->len);
967 network->rsn_ie_len = min(info_element->len + 2,
968 MAX_WPA_IE_LEN);
969 memcpy(network->rsn_ie, info_element,
970 network->rsn_ie_len);
971 break;
972
973 default:
974 IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
975 info_element->id);
976 break;
977 }
978
979 left -= sizeof(struct ieee80211_info_element_hdr) +
980 info_element->len;
981 info_element = (struct ieee80211_info_element *)
982 &info_element->data[info_element->len];
983 }
984
985 network->mode = 0;
986 if (stats->freq == IEEE80211_52GHZ_BAND)
987 network->mode = IEEE_A;
988 else {
989 if (network->flags & NETWORK_HAS_OFDM)
990 network->mode |= IEEE_G;
991 if (network->flags & NETWORK_HAS_CCK)
992 network->mode |= IEEE_B;
993 }
994
995 if (network->mode == 0) {
996 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
997 "network.\n",
998 escape_essid(network->ssid,
999 network->ssid_len),
1000 MAC_ARG(network->bssid));
1001 return 1;
1002 }
1003
1004 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1005 network->flags |= NETWORK_EMPTY_ESSID;
1006
1007 memcpy(&network->stats, stats, sizeof(network->stats));
1008
1009 return 0;
1010}
1011
1012static inline int is_same_network(struct ieee80211_network *src,
1013 struct ieee80211_network *dst)
1014{
1015 /* A network is only a duplicate if the channel, BSSID, and ESSID
1016 * all match. We treat all <hidden> with the same BSSID and channel
1017 * as one network */
1018 return ((src->ssid_len == dst->ssid_len) &&
1019 (src->channel == dst->channel) &&
1020 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
1021 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1022}
1023
1024static inline void update_network(struct ieee80211_network *dst,
1025 struct ieee80211_network *src)
1026{
1027 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
1028 dst->capability = src->capability;
1029 memcpy(dst->rates, src->rates, src->rates_len);
1030 dst->rates_len = src->rates_len;
1031 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1032 dst->rates_ex_len = src->rates_ex_len;
1033
1034 dst->mode = src->mode;
1035 dst->flags = src->flags;
1036 dst->time_stamp[0] = src->time_stamp[0];
1037 dst->time_stamp[1] = src->time_stamp[1];
1038
1039 dst->beacon_interval = src->beacon_interval;
1040 dst->listen_interval = src->listen_interval;
1041 dst->atim_window = src->atim_window;
1042
1043 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1044 dst->wpa_ie_len = src->wpa_ie_len;
1045 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1046 dst->rsn_ie_len = src->rsn_ie_len;
1047
1048 dst->last_scanned = jiffies;
1049 /* dst->last_associate is not overwritten */
1050}
1051
1052static inline void ieee80211_process_probe_response(
1053 struct ieee80211_device *ieee,
1054 struct ieee80211_probe_response *beacon,
1055 struct ieee80211_rx_stats *stats)
1056{
1057 struct ieee80211_network network;
1058 struct ieee80211_network *target;
1059 struct ieee80211_network *oldest = NULL;
1060#ifdef CONFIG_IEEE80211_DEBUG
1061 struct ieee80211_info_element *info_element = &beacon->info_element;
1062#endif
1063 unsigned long flags;
1064
1065 IEEE80211_DEBUG_SCAN(
1066 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1067 escape_essid(info_element->data, info_element->len),
1068 MAC_ARG(beacon->header.addr3),
1069 (beacon->capability & (1<<0xf)) ? '1' : '0',
1070 (beacon->capability & (1<<0xe)) ? '1' : '0',
1071 (beacon->capability & (1<<0xd)) ? '1' : '0',
1072 (beacon->capability & (1<<0xc)) ? '1' : '0',
1073 (beacon->capability & (1<<0xb)) ? '1' : '0',
1074 (beacon->capability & (1<<0xa)) ? '1' : '0',
1075 (beacon->capability & (1<<0x9)) ? '1' : '0',
1076 (beacon->capability & (1<<0x8)) ? '1' : '0',
1077 (beacon->capability & (1<<0x7)) ? '1' : '0',
1078 (beacon->capability & (1<<0x6)) ? '1' : '0',
1079 (beacon->capability & (1<<0x5)) ? '1' : '0',
1080 (beacon->capability & (1<<0x4)) ? '1' : '0',
1081 (beacon->capability & (1<<0x3)) ? '1' : '0',
1082 (beacon->capability & (1<<0x2)) ? '1' : '0',
1083 (beacon->capability & (1<<0x1)) ? '1' : '0',
1084 (beacon->capability & (1<<0x0)) ? '1' : '0');
1085
1086 if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1087 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1088 escape_essid(info_element->data,
1089 info_element->len),
1090 MAC_ARG(beacon->header.addr3),
1091 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1092 IEEE80211_STYPE_PROBE_RESP ?
1093 "PROBE RESPONSE" : "BEACON");
1094 return;
1095 }
1096
1097 /* The network parsed correctly -- so now we scan our known networks
1098 * to see if we can find it in our list.
1099 *
1100 * NOTE: This search is definitely not optimized. Once its doing
1101 * the "right thing" we'll optimize it for efficiency if
1102 * necessary */
1103
1104 /* Search for this entry in the list and update it if it is
1105 * already there. */
1106
1107 spin_lock_irqsave(&ieee->lock, flags);
1108
1109 list_for_each_entry(target, &ieee->network_list, list) {
1110 if (is_same_network(target, &network))
1111 break;
1112
1113 if ((oldest == NULL) ||
1114 (target->last_scanned < oldest->last_scanned))
1115 oldest = target;
1116 }
1117
1118 /* If we didn't find a match, then get a new network slot to initialize
1119 * with this beacon's information */
1120 if (&target->list == &ieee->network_list) {
1121 if (list_empty(&ieee->network_free_list)) {
1122 /* If there are no more slots, expire the oldest */
1123 list_del(&oldest->list);
1124 target = oldest;
1125 IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1126 "network list.\n",
1127 escape_essid(target->ssid,
1128 target->ssid_len),
1129 MAC_ARG(target->bssid));
1130 } else {
1131 /* Otherwise just pull from the free list */
1132 target = list_entry(ieee->network_free_list.next,
1133 struct ieee80211_network, list);
1134 list_del(ieee->network_free_list.next);
1135 }
1136
1137
1138#ifdef CONFIG_IEEE80211_DEBUG
1139 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1140 escape_essid(network.ssid,
1141 network.ssid_len),
1142 MAC_ARG(network.bssid),
1143 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1144 IEEE80211_STYPE_PROBE_RESP ?
1145 "PROBE RESPONSE" : "BEACON");
1146#endif
1147 memcpy(target, &network, sizeof(*target));
1148 list_add_tail(&target->list, &ieee->network_list);
1149 } else {
1150 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1151 escape_essid(target->ssid,
1152 target->ssid_len),
1153 MAC_ARG(target->bssid),
1154 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1155 IEEE80211_STYPE_PROBE_RESP ?
1156 "PROBE RESPONSE" : "BEACON");
1157 update_network(target, &network);
1158 }
1159
1160 spin_unlock_irqrestore(&ieee->lock, flags);
1161}
1162
1163void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1164 struct ieee80211_hdr *header,
1165 struct ieee80211_rx_stats *stats)
1166{
1167 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
1168 case IEEE80211_STYPE_ASSOC_RESP:
1169 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1170 WLAN_FC_GET_STYPE(header->frame_ctl));
1171 break;
1172
1173 case IEEE80211_STYPE_REASSOC_RESP:
1174 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1175 WLAN_FC_GET_STYPE(header->frame_ctl));
1176 break;
1177
1178 case IEEE80211_STYPE_PROBE_RESP:
1179 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1180 WLAN_FC_GET_STYPE(header->frame_ctl));
1181 IEEE80211_DEBUG_SCAN("Probe response\n");
1182 ieee80211_process_probe_response(
1183 ieee, (struct ieee80211_probe_response *)header, stats);
1184 break;
1185
1186 case IEEE80211_STYPE_BEACON:
1187 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1188 WLAN_FC_GET_STYPE(header->frame_ctl));
1189 IEEE80211_DEBUG_SCAN("Beacon\n");
1190 ieee80211_process_probe_response(
1191 ieee, (struct ieee80211_probe_response *)header, stats);
1192 break;
1193
1194 default:
1195 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1196 WLAN_FC_GET_STYPE(header->frame_ctl));
1197 IEEE80211_WARNING("%s: Unknown management packet: %d\n",
1198 ieee->dev->name,
1199 WLAN_FC_GET_STYPE(header->frame_ctl));
1200 break;
1201 }
1202}
1203
1204
1205EXPORT_SYMBOL(ieee80211_rx_mgt);
1206EXPORT_SYMBOL(ieee80211_rx);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-25 21:51:03 -0500