Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6] / net / ieee80211 / ieee80211_rx.c
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
39 static 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) */
57 static struct ieee80211_frag_entry *
58 ieee80211_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) */
87 static struct sk_buff *
88 ieee80211_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) */
140 static 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 */
171 static inline int
172 ieee80211_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) */
225 static unsigned char rfc1042_header[] =
226 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
227 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
228 static 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 */
233 static 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 */
273 static inline int
274 ieee80211_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 */
318 static inline int
319 ieee80211_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). */
348 int 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
775 static 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
792 static 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
995 static 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
1007 static 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
1035 static 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
1146 void 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
1188 EXPORT_SYMBOL(ieee80211_rx_mgt);
1189 EXPORT_SYMBOL(ieee80211_rx);