Merge branch 'upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-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 /* Called only as a tasklet (software IRQ) */
56 static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
57                                                               ieee80211_device
58                                                               *ieee,
59                                                               unsigned int seq,
60                                                               unsigned int frag,
61                                                               u8 * src,
62                                                               u8 * dst)
63 {
64         struct ieee80211_frag_entry *entry;
65         int i;
66
67         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
68                 entry = &ieee->frag_cache[i];
69                 if (entry->skb != NULL &&
70                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
71                         IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
72                                              "seq=%u last_frag=%u\n",
73                                              entry->seq, entry->last_frag);
74                         dev_kfree_skb_any(entry->skb);
75                         entry->skb = NULL;
76                 }
77
78                 if (entry->skb != NULL && entry->seq == seq &&
79                     (entry->last_frag + 1 == frag || frag == -1) &&
80                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
81                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
82                         return entry;
83         }
84
85         return NULL;
86 }
87
88 /* Called only as a tasklet (software IRQ) */
89 static struct sk_buff *ieee80211_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 /* 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("could not invalidate fragment cache "
155                                      "entry (seq=%u)\n", seq);
156                 return -1;
157         }
158
159         entry->skb = NULL;
160         return 0;
161 }
162
163 #ifdef NOT_YET
164 /* ieee80211_rx_frame_mgtmt
165  *
166  * Responsible for handling management control frames
167  *
168  * Called by ieee80211_rx */
169 static inline int
170 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
171                         struct ieee80211_rx_stats *rx_stats, u16 type,
172                         u16 stype)
173 {
174         if (ieee->iw_mode == IW_MODE_MASTER) {
175                 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
176                        ieee->dev->name);
177                 return 0;
178 /*
179   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr *)
180   skb->data);*/
181         }
182
183         if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
184                 if (stype == WLAN_FC_STYPE_BEACON &&
185                     ieee->iw_mode == IW_MODE_MASTER) {
186                         struct sk_buff *skb2;
187                         /* Process beacon frames also in kernel driver to
188                          * update STA(AP) table statistics */
189                         skb2 = skb_clone(skb, GFP_ATOMIC);
190                         if (skb2)
191                                 hostap_rx(skb2->dev, skb2, rx_stats);
192                 }
193
194                 /* send management frames to the user space daemon for
195                  * processing */
196                 ieee->apdevstats.rx_packets++;
197                 ieee->apdevstats.rx_bytes += skb->len;
198                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
199                 return 0;
200         }
201
202         if (ieee->iw_mode == IW_MODE_MASTER) {
203                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
204                         printk(KERN_DEBUG "%s: unknown management frame "
205                                "(type=0x%02x, stype=0x%02x) dropped\n",
206                                skb->dev->name, type, stype);
207                         return -1;
208                 }
209
210                 hostap_rx(skb->dev, skb, rx_stats);
211                 return 0;
212         }
213
214         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
215                "received in non-Host AP mode\n", skb->dev->name);
216         return -1;
217 }
218 #endif
219
220 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
221 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
222 static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
223
224 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
225 static unsigned char bridge_tunnel_header[] =
226     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
227 /* No encapsulation header if EtherType < 0x600 (=length) */
228
229 /* Called by ieee80211_rx_frame_decrypt */
230 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
231                                     struct sk_buff *skb)
232 {
233         struct net_device *dev = ieee->dev;
234         u16 fc, ethertype;
235         struct ieee80211_hdr *hdr;
236         u8 *pos;
237
238         if (skb->len < 24)
239                 return 0;
240
241         hdr = (struct ieee80211_hdr *)skb->data;
242         fc = le16_to_cpu(hdr->frame_ctl);
243
244         /* check that the frame is unicast frame to us */
245         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
246             IEEE80211_FCTL_TODS &&
247             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
248             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
249                 /* ToDS frame with own addr BSSID and DA */
250         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
251                    IEEE80211_FCTL_FROMDS &&
252                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
253                 /* FromDS frame with own addr as DA */
254         } else
255                 return 0;
256
257         if (skb->len < 24 + 8)
258                 return 0;
259
260         /* check for port access entity Ethernet type */
261         pos = skb->data + 24;
262         ethertype = (pos[6] << 8) | pos[7];
263         if (ethertype == ETH_P_PAE)
264                 return 1;
265
266         return 0;
267 }
268
269 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
270 static inline int
271 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
272                            struct ieee80211_crypt_data *crypt)
273 {
274         struct ieee80211_hdr *hdr;
275         int res, hdrlen;
276
277         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
278                 return 0;
279
280         hdr = (struct ieee80211_hdr *)skb->data;
281         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
282
283 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
284         if (ieee->tkip_countermeasures && strcmp(crypt->ops->name, "TKIP") == 0) {
285                 if (net_ratelimit()) {
286                         printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
287                                "received packet from " MAC_FMT "\n",
288                                ieee->dev->name, MAC_ARG(hdr->addr2));
289                 }
290                 return -1;
291         }
292 #endif
293
294         atomic_inc(&crypt->refcnt);
295         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
296         atomic_dec(&crypt->refcnt);
297         if (res < 0) {
298                 IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT
299                                      ") res=%d\n", MAC_ARG(hdr->addr2), res);
300                 if (res == -2)
301                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
302                                              "mismatch (key %d)\n",
303                                              skb->data[hdrlen + 3] >> 6);
304                 ieee->ieee_stats.rx_discards_undecryptable++;
305                 return -1;
306         }
307
308         return res;
309 }
310
311 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
312 static inline int
313 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
314                                 struct sk_buff *skb, int keyidx,
315                                 struct ieee80211_crypt_data *crypt)
316 {
317         struct ieee80211_hdr *hdr;
318         int res, hdrlen;
319
320         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
321                 return 0;
322
323         hdr = (struct ieee80211_hdr *)skb->data;
324         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
325
326         atomic_inc(&crypt->refcnt);
327         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
328         atomic_dec(&crypt->refcnt);
329         if (res < 0) {
330                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
331                        " (SA=" MAC_FMT " keyidx=%d)\n",
332                        ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
333                 return -1;
334         }
335
336         return 0;
337 }
338
339 /* All received frames are sent to this function. @skb contains the frame in
340  * IEEE 802.11 format, i.e., in the format it was sent over air.
341  * This function is called only as a tasklet (software IRQ). */
342 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
343                  struct ieee80211_rx_stats *rx_stats)
344 {
345         struct net_device *dev = ieee->dev;
346         struct ieee80211_hdr *hdr;
347         size_t hdrlen;
348         u16 fc, type, stype, sc;
349         struct net_device_stats *stats;
350         unsigned int frag;
351         u8 *payload;
352         u16 ethertype;
353 #ifdef NOT_YET
354         struct net_device *wds = NULL;
355         struct sk_buff *skb2 = NULL;
356         struct net_device *wds = NULL;
357         int frame_authorized = 0;
358         int from_assoc_ap = 0;
359         void *sta = NULL;
360 #endif
361         u8 dst[ETH_ALEN];
362         u8 src[ETH_ALEN];
363         struct ieee80211_crypt_data *crypt = NULL;
364         int keyidx = 0;
365
366         hdr = (struct ieee80211_hdr *)skb->data;
367         stats = &ieee->stats;
368
369         if (skb->len < 10) {
370                 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
371                 goto rx_dropped;
372         }
373
374         fc = le16_to_cpu(hdr->frame_ctl);
375         type = WLAN_FC_GET_TYPE(fc);
376         stype = WLAN_FC_GET_STYPE(fc);
377         sc = le16_to_cpu(hdr->seq_ctl);
378         frag = WLAN_GET_SEQ_FRAG(sc);
379         hdrlen = ieee80211_get_hdrlen(fc);
380
381 #ifdef NOT_YET
382 #if WIRELESS_EXT > 15
383         /* Put this code here so that we avoid duplicating it in all
384          * Rx paths. - Jean II */
385 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
386         /* If spy monitoring on */
387         if (iface->spy_data.spy_number > 0) {
388                 struct iw_quality wstats;
389                 wstats.level = rx_stats->signal;
390                 wstats.noise = rx_stats->noise;
391                 wstats.updated = 6;     /* No qual value */
392                 /* Update spy records */
393                 wireless_spy_update(dev, hdr->addr2, &wstats);
394         }
395 #endif                          /* IW_WIRELESS_SPY */
396 #endif                          /* WIRELESS_EXT > 15 */
397         hostap_update_rx_stats(local->ap, hdr, rx_stats);
398 #endif
399
400 #if WIRELESS_EXT > 15
401         if (ieee->iw_mode == IW_MODE_MONITOR) {
402                 ieee80211_monitor_rx(ieee, skb, rx_stats);
403                 stats->rx_packets++;
404                 stats->rx_bytes += skb->len;
405                 return 1;
406         }
407 #endif
408
409         if (ieee->host_decrypt) {
410                 int idx = 0;
411                 if (skb->len >= hdrlen + 3)
412                         idx = skb->data[hdrlen + 3] >> 6;
413                 crypt = ieee->crypt[idx];
414 #ifdef NOT_YET
415                 sta = NULL;
416
417                 /* Use station specific key to override default keys if the
418                  * receiver address is a unicast address ("individual RA"). If
419                  * bcrx_sta_key parameter is set, station specific key is used
420                  * even with broad/multicast targets (this is against IEEE
421                  * 802.11, but makes it easier to use different keys with
422                  * stations that do not support WEP key mapping). */
423
424                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
425                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
426                                                        &sta);
427 #endif
428
429                 /* allow NULL decrypt to indicate an station specific override
430                  * for default encryption */
431                 if (crypt && (crypt->ops == NULL ||
432                               crypt->ops->decrypt_mpdu == NULL))
433                         crypt = NULL;
434
435                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
436                         /* This seems to be triggered by some (multicast?)
437                          * frames from other than current BSS, so just drop the
438                          * frames silently instead of filling system log with
439                          * these reports. */
440                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
441                                              " (SA=" MAC_FMT ")\n",
442                                              MAC_ARG(hdr->addr2));
443                         ieee->ieee_stats.rx_discards_undecryptable++;
444                         goto rx_dropped;
445                 }
446         }
447 #ifdef NOT_YET
448         if (type != WLAN_FC_TYPE_DATA) {
449                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
450                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
451                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
452                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
453                                "from " MAC_FMT "\n", dev->name,
454                                MAC_ARG(hdr->addr2));
455                         /* TODO: could inform hostapd about this so that it
456                          * could send auth failure report */
457                         goto rx_dropped;
458                 }
459
460                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
461                         goto rx_dropped;
462                 else
463                         goto rx_exit;
464         }
465 #endif
466
467         /* Data frame - extract src/dst addresses */
468         if (skb->len < IEEE80211_3ADDR_LEN)
469                 goto rx_dropped;
470
471         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
472         case IEEE80211_FCTL_FROMDS:
473                 memcpy(dst, hdr->addr1, ETH_ALEN);
474                 memcpy(src, hdr->addr3, ETH_ALEN);
475                 break;
476         case IEEE80211_FCTL_TODS:
477                 memcpy(dst, hdr->addr3, ETH_ALEN);
478                 memcpy(src, hdr->addr2, ETH_ALEN);
479                 break;
480         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
481                 if (skb->len < IEEE80211_4ADDR_LEN)
482                         goto rx_dropped;
483                 memcpy(dst, hdr->addr3, ETH_ALEN);
484                 memcpy(src, hdr->addr4, ETH_ALEN);
485                 break;
486         case 0:
487                 memcpy(dst, hdr->addr1, ETH_ALEN);
488                 memcpy(src, hdr->addr2, ETH_ALEN);
489                 break;
490         }
491
492 #ifdef NOT_YET
493         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
494                 goto rx_dropped;
495         if (wds) {
496                 skb->dev = dev = wds;
497                 stats = hostap_get_stats(dev);
498         }
499
500         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
501             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
502             IEEE80211_FCTL_FROMDS && ieee->stadev
503             && memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
504                 /* Frame from BSSID of the AP for which we are a client */
505                 skb->dev = dev = ieee->stadev;
506                 stats = hostap_get_stats(dev);
507                 from_assoc_ap = 1;
508         }
509 #endif
510
511         dev->last_rx = jiffies;
512
513 #ifdef NOT_YET
514         if ((ieee->iw_mode == IW_MODE_MASTER ||
515              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
516                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
517                                              wds != NULL)) {
518                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
519                         frame_authorized = 0;
520                         break;
521                 case AP_RX_CONTINUE:
522                         frame_authorized = 1;
523                         break;
524                 case AP_RX_DROP:
525                         goto rx_dropped;
526                 case AP_RX_EXIT:
527                         goto rx_exit;
528                 }
529         }
530 #endif
531
532         /* Nullfunc frames may have PS-bit set, so they must be passed to
533          * hostap_handle_sta_rx() before being dropped here. */
534         if (stype != IEEE80211_STYPE_DATA &&
535             stype != IEEE80211_STYPE_DATA_CFACK &&
536             stype != IEEE80211_STYPE_DATA_CFPOLL &&
537             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
538                 if (stype != IEEE80211_STYPE_NULLFUNC)
539                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
540                                              "with no data (type=0x%02x, "
541                                              "subtype=0x%02x, len=%d)\n",
542                                              type, stype, skb->len);
543                 goto rx_dropped;
544         }
545
546         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
547
548         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
549             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
550                 goto rx_dropped;
551
552         hdr = (struct ieee80211_hdr *)skb->data;
553
554         /* skb: hdr + (possibly fragmented) plaintext payload */
555         // PR: FIXME: hostap has additional conditions in the "if" below:
556         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
557         if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
558                 int flen;
559                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
560                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
561
562                 if (!frag_skb) {
563                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
564                                         "Rx cannot get skb from fragment "
565                                         "cache (morefrag=%d seq=%u frag=%u)\n",
566                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
567                                         WLAN_GET_SEQ_SEQ(sc), frag);
568                         goto rx_dropped;
569                 }
570
571                 flen = skb->len;
572                 if (frag != 0)
573                         flen -= hdrlen;
574
575                 if (frag_skb->tail + flen > frag_skb->end) {
576                         printk(KERN_WARNING "%s: host decrypted and "
577                                "reassembled frame did not fit skb\n",
578                                dev->name);
579                         ieee80211_frag_cache_invalidate(ieee, hdr);
580                         goto rx_dropped;
581                 }
582
583                 if (frag == 0) {
584                         /* copy first fragment (including full headers) into
585                          * beginning of the fragment cache skb */
586                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
587                 } else {
588                         /* append frame payload to the end of the fragment
589                          * cache skb */
590                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
591                                flen);
592                 }
593                 dev_kfree_skb_any(skb);
594                 skb = NULL;
595
596                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
597                         /* more fragments expected - leave the skb in fragment
598                          * cache for now; it will be delivered to upper layers
599                          * after all fragments have been received */
600                         goto rx_exit;
601                 }
602
603                 /* this was the last fragment and the frame will be
604                  * delivered, so remove skb from fragment cache */
605                 skb = frag_skb;
606                 hdr = (struct ieee80211_hdr *)skb->data;
607                 ieee80211_frag_cache_invalidate(ieee, hdr);
608         }
609
610         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
611          * encrypted/authenticated */
612         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
613             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
614                 goto rx_dropped;
615
616         hdr = (struct ieee80211_hdr *)skb->data;
617         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
618                 if (            /*ieee->ieee802_1x && */
619                            ieee80211_is_eapol_frame(ieee, skb)) {
620                         /* pass unencrypted EAPOL frames even if encryption is
621                          * configured */
622                 } else {
623                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
624                                              "frame not encrypted (SA=" MAC_FMT
625                                              ")\n", MAC_ARG(hdr->addr2));
626                         goto rx_dropped;
627                 }
628         }
629
630         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
631             !ieee80211_is_eapol_frame(ieee, skb)) {
632                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
633                                      "frame from " MAC_FMT
634                                      " (drop_unencrypted=1)\n",
635                                      MAC_ARG(hdr->addr2));
636                 goto rx_dropped;
637         }
638
639         /* skb: hdr + (possible reassembled) full plaintext payload */
640
641         payload = skb->data + hdrlen;
642         ethertype = (payload[6] << 8) | payload[7];
643
644 #ifdef NOT_YET
645         /* If IEEE 802.1X is used, check whether the port is authorized to send
646          * the received frame. */
647         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
648                 if (ethertype == ETH_P_PAE) {
649                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
650                                dev->name);
651                         if (ieee->hostapd && ieee->apdev) {
652                                 /* Send IEEE 802.1X frames to the user
653                                  * space daemon for processing */
654                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
655                                                 PRISM2_RX_MGMT);
656                                 ieee->apdevstats.rx_packets++;
657                                 ieee->apdevstats.rx_bytes += skb->len;
658                                 goto rx_exit;
659                         }
660                 } else if (!frame_authorized) {
661                         printk(KERN_DEBUG "%s: dropped frame from "
662                                "unauthorized port (IEEE 802.1X): "
663                                "ethertype=0x%04x\n", dev->name, ethertype);
664                         goto rx_dropped;
665                 }
666         }
667 #endif
668
669         /* convert hdr + possible LLC headers into Ethernet header */
670         if (skb->len - hdrlen >= 8 &&
671             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
672               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
673              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
674                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
675                  * replace EtherType */
676                 skb_pull(skb, hdrlen + SNAP_SIZE);
677                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
678                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
679         } else {
680                 u16 len;
681                 /* Leave Ethernet header part of hdr and full payload */
682                 skb_pull(skb, hdrlen);
683                 len = htons(skb->len);
684                 memcpy(skb_push(skb, 2), &len, 2);
685                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
686                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
687         }
688
689 #ifdef NOT_YET
690         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
691                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
692                 /* Non-standard frame: get addr4 from its bogus location after
693                  * the payload */
694                 memcpy(skb->data + ETH_ALEN,
695                        skb->data + skb->len - ETH_ALEN, ETH_ALEN);
696                 skb_trim(skb, skb->len - ETH_ALEN);
697         }
698 #endif
699
700         stats->rx_packets++;
701         stats->rx_bytes += skb->len;
702
703 #ifdef NOT_YET
704         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
705                 if (dst[0] & 0x01) {
706                         /* copy multicast frame both to the higher layers and
707                          * to the wireless media */
708                         ieee->ap->bridged_multicast++;
709                         skb2 = skb_clone(skb, GFP_ATOMIC);
710                         if (skb2 == NULL)
711                                 printk(KERN_DEBUG "%s: skb_clone failed for "
712                                        "multicast frame\n", dev->name);
713                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
714                         /* send frame directly to the associated STA using
715                          * wireless media and not passing to higher layers */
716                         ieee->ap->bridged_unicast++;
717                         skb2 = skb;
718                         skb = NULL;
719                 }
720         }
721
722         if (skb2 != NULL) {
723                 /* send to wireless media */
724                 skb2->protocol = __constant_htons(ETH_P_802_3);
725                 skb2->mac.raw = skb2->nh.raw = skb2->data;
726                 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
727                 skb2->dev = dev;
728                 dev_queue_xmit(skb2);
729         }
730 #endif
731
732         if (skb) {
733                 skb->protocol = eth_type_trans(skb, dev);
734                 memset(skb->cb, 0, sizeof(skb->cb));
735                 skb->dev = dev;
736                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
737                 netif_rx(skb);
738         }
739
740       rx_exit:
741 #ifdef NOT_YET
742         if (sta)
743                 hostap_handle_sta_release(sta);
744 #endif
745         return 1;
746
747       rx_dropped:
748         stats->rx_dropped++;
749
750         /* Returning 0 indicates to caller that we have not handled the SKB--
751          * so it is still allocated and can be used again by underlying
752          * hardware as a DMA target */
753         return 0;
754 }
755
756 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
757
758 static inline int ieee80211_is_ofdm_rate(u8 rate)
759 {
760         switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
761         case IEEE80211_OFDM_RATE_6MB:
762         case IEEE80211_OFDM_RATE_9MB:
763         case IEEE80211_OFDM_RATE_12MB:
764         case IEEE80211_OFDM_RATE_18MB:
765         case IEEE80211_OFDM_RATE_24MB:
766         case IEEE80211_OFDM_RATE_36MB:
767         case IEEE80211_OFDM_RATE_48MB:
768         case IEEE80211_OFDM_RATE_54MB:
769                 return 1;
770         }
771         return 0;
772 }
773
774 static inline int ieee80211_network_init(struct ieee80211_device *ieee,
775                                          struct ieee80211_probe_response
776                                          *beacon,
777                                          struct ieee80211_network *network,
778                                          struct ieee80211_rx_stats *stats)
779 {
780 #ifdef CONFIG_IEEE80211_DEBUG
781         char rates_str[64];
782         char *p;
783 #endif
784         struct ieee80211_info_element *info_element;
785         u16 left;
786         u8 i;
787
788         /* Pull out fixed field data */
789         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
790         network->capability = beacon->capability;
791         network->last_scanned = jiffies;
792         network->time_stamp[0] = beacon->time_stamp[0];
793         network->time_stamp[1] = beacon->time_stamp[1];
794         network->beacon_interval = beacon->beacon_interval;
795         /* Where to pull this? beacon->listen_interval; */
796         network->listen_interval = 0x0A;
797         network->rates_len = network->rates_ex_len = 0;
798         network->last_associate = 0;
799         network->ssid_len = 0;
800         network->flags = 0;
801         network->atim_window = 0;
802
803         if (stats->freq == IEEE80211_52GHZ_BAND) {
804                 /* for A band (No DS info) */
805                 network->channel = stats->received_channel;
806         } else
807                 network->flags |= NETWORK_HAS_CCK;
808
809         network->wpa_ie_len = 0;
810         network->rsn_ie_len = 0;
811
812         info_element = &beacon->info_element;
813         left = stats->len - ((void *)info_element - (void *)beacon);
814         while (left >= sizeof(struct ieee80211_info_element_hdr)) {
815                 if (sizeof(struct ieee80211_info_element_hdr) +
816                     info_element->len > left) {
817                         IEEE80211_DEBUG_SCAN
818                             ("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%Zd left=%d.\n",
819                              info_element->len +
820                              sizeof(struct ieee80211_info_element), left);
821                         return 1;
822                 }
823
824                 switch (info_element->id) {
825                 case MFIE_TYPE_SSID:
826                         if (ieee80211_is_empty_essid(info_element->data,
827                                                      info_element->len)) {
828                                 network->flags |= NETWORK_EMPTY_ESSID;
829                                 break;
830                         }
831
832                         network->ssid_len = min(info_element->len,
833                                                 (u8) IW_ESSID_MAX_SIZE);
834                         memcpy(network->ssid, info_element->data,
835                                network->ssid_len);
836                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
837                                 memset(network->ssid + network->ssid_len, 0,
838                                        IW_ESSID_MAX_SIZE - network->ssid_len);
839
840                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n",
841                                              network->ssid, network->ssid_len);
842                         break;
843
844                 case MFIE_TYPE_RATES:
845 #ifdef CONFIG_IEEE80211_DEBUG
846                         p = rates_str;
847 #endif
848                         network->rates_len =
849                             min(info_element->len, MAX_RATES_LENGTH);
850                         for (i = 0; i < network->rates_len; i++) {
851                                 network->rates[i] = info_element->data[i];
852 #ifdef CONFIG_IEEE80211_DEBUG
853                                 p += snprintf(p,
854                                               sizeof(rates_str) - (p -
855                                                                    rates_str),
856                                               "%02X ", network->rates[i]);
857 #endif
858                                 if (ieee80211_is_ofdm_rate
859                                     (info_element->data[i])) {
860                                         network->flags |= NETWORK_HAS_OFDM;
861                                         if (info_element->data[i] &
862                                             IEEE80211_BASIC_RATE_MASK)
863                                                 network->flags &=
864                                                     ~NETWORK_HAS_CCK;
865                                 }
866                         }
867
868                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n",
869                                              rates_str, network->rates_len);
870                         break;
871
872                 case MFIE_TYPE_RATES_EX:
873 #ifdef CONFIG_IEEE80211_DEBUG
874                         p = rates_str;
875 #endif
876                         network->rates_ex_len =
877                             min(info_element->len, MAX_RATES_EX_LENGTH);
878                         for (i = 0; i < network->rates_ex_len; i++) {
879                                 network->rates_ex[i] = info_element->data[i];
880 #ifdef CONFIG_IEEE80211_DEBUG
881                                 p += snprintf(p,
882                                               sizeof(rates_str) - (p -
883                                                                    rates_str),
884                                               "%02X ", network->rates[i]);
885 #endif
886                                 if (ieee80211_is_ofdm_rate
887                                     (info_element->data[i])) {
888                                         network->flags |= NETWORK_HAS_OFDM;
889                                         if (info_element->data[i] &
890                                             IEEE80211_BASIC_RATE_MASK)
891                                                 network->flags &=
892                                                     ~NETWORK_HAS_CCK;
893                                 }
894                         }
895
896                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
897                                              rates_str, network->rates_ex_len);
898                         break;
899
900                 case MFIE_TYPE_DS_SET:
901                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
902                                              info_element->data[0]);
903                         if (stats->freq == IEEE80211_24GHZ_BAND)
904                                 network->channel = info_element->data[0];
905                         break;
906
907                 case MFIE_TYPE_FH_SET:
908                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
909                         break;
910
911                 case MFIE_TYPE_CF_SET:
912                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
913                         break;
914
915                 case MFIE_TYPE_TIM:
916                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_TIM: ignored\n");
917                         break;
918
919                 case MFIE_TYPE_IBSS_SET:
920                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
921                         break;
922
923                 case MFIE_TYPE_CHALLENGE:
924                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
925                         break;
926
927                 case MFIE_TYPE_GENERIC:
928                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
929                                              info_element->len);
930                         if (info_element->len >= 4 &&
931                             info_element->data[0] == 0x00 &&
932                             info_element->data[1] == 0x50 &&
933                             info_element->data[2] == 0xf2 &&
934                             info_element->data[3] == 0x01) {
935                                 network->wpa_ie_len = min(info_element->len + 2,
936                                                           MAX_WPA_IE_LEN);
937                                 memcpy(network->wpa_ie, info_element,
938                                        network->wpa_ie_len);
939                         }
940                         break;
941
942                 case MFIE_TYPE_RSN:
943                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n",
944                                              info_element->len);
945                         network->rsn_ie_len = min(info_element->len + 2,
946                                                   MAX_WPA_IE_LEN);
947                         memcpy(network->rsn_ie, info_element,
948                                network->rsn_ie_len);
949                         break;
950
951                 default:
952                         IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
953                                              info_element->id);
954                         break;
955                 }
956
957                 left -= sizeof(struct ieee80211_info_element_hdr) +
958                     info_element->len;
959                 info_element = (struct ieee80211_info_element *)
960                     &info_element->data[info_element->len];
961         }
962
963         network->mode = 0;
964         if (stats->freq == IEEE80211_52GHZ_BAND)
965                 network->mode = IEEE_A;
966         else {
967                 if (network->flags & NETWORK_HAS_OFDM)
968                         network->mode |= IEEE_G;
969                 if (network->flags & NETWORK_HAS_CCK)
970                         network->mode |= IEEE_B;
971         }
972
973         if (network->mode == 0) {
974                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
975                                      "network.\n",
976                                      escape_essid(network->ssid,
977                                                   network->ssid_len),
978                                      MAC_ARG(network->bssid));
979                 return 1;
980         }
981
982         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
983                 network->flags |= NETWORK_EMPTY_ESSID;
984
985         memcpy(&network->stats, stats, sizeof(network->stats));
986
987         return 0;
988 }
989
990 static inline int is_same_network(struct ieee80211_network *src,
991                                   struct ieee80211_network *dst)
992 {
993         /* A network is only a duplicate if the channel, BSSID, and ESSID
994          * all match.  We treat all <hidden> with the same BSSID and channel
995          * as one network */
996         return ((src->ssid_len == dst->ssid_len) &&
997                 (src->channel == dst->channel) &&
998                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
999                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1000 }
1001
1002 static inline void update_network(struct ieee80211_network *dst,
1003                                   struct ieee80211_network *src)
1004 {
1005         memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
1006         dst->capability = src->capability;
1007         memcpy(dst->rates, src->rates, src->rates_len);
1008         dst->rates_len = src->rates_len;
1009         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1010         dst->rates_ex_len = src->rates_ex_len;
1011
1012         dst->mode = src->mode;
1013         dst->flags = src->flags;
1014         dst->time_stamp[0] = src->time_stamp[0];
1015         dst->time_stamp[1] = src->time_stamp[1];
1016
1017         dst->beacon_interval = src->beacon_interval;
1018         dst->listen_interval = src->listen_interval;
1019         dst->atim_window = src->atim_window;
1020
1021         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1022         dst->wpa_ie_len = src->wpa_ie_len;
1023         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1024         dst->rsn_ie_len = src->rsn_ie_len;
1025
1026         dst->last_scanned = jiffies;
1027         /* dst->last_associate is not overwritten */
1028 }
1029
1030 static inline void ieee80211_process_probe_response(struct ieee80211_device
1031                                                     *ieee,
1032                                                     struct
1033                                                     ieee80211_probe_response
1034                                                     *beacon,
1035                                                     struct ieee80211_rx_stats
1036                                                     *stats)
1037 {
1038         struct ieee80211_network network;
1039         struct ieee80211_network *target;
1040         struct ieee80211_network *oldest = NULL;
1041 #ifdef CONFIG_IEEE80211_DEBUG
1042         struct ieee80211_info_element *info_element = &beacon->info_element;
1043 #endif
1044         unsigned long flags;
1045
1046         IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1047                              "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1048                              escape_essid(info_element->data,
1049                                           info_element->len),
1050                              MAC_ARG(beacon->header.addr3),
1051                              (beacon->capability & (1 << 0xf)) ? '1' : '0',
1052                              (beacon->capability & (1 << 0xe)) ? '1' : '0',
1053                              (beacon->capability & (1 << 0xd)) ? '1' : '0',
1054                              (beacon->capability & (1 << 0xc)) ? '1' : '0',
1055                              (beacon->capability & (1 << 0xb)) ? '1' : '0',
1056                              (beacon->capability & (1 << 0xa)) ? '1' : '0',
1057                              (beacon->capability & (1 << 0x9)) ? '1' : '0',
1058                              (beacon->capability & (1 << 0x8)) ? '1' : '0',
1059                              (beacon->capability & (1 << 0x7)) ? '1' : '0',
1060                              (beacon->capability & (1 << 0x6)) ? '1' : '0',
1061                              (beacon->capability & (1 << 0x5)) ? '1' : '0',
1062                              (beacon->capability & (1 << 0x4)) ? '1' : '0',
1063                              (beacon->capability & (1 << 0x3)) ? '1' : '0',
1064                              (beacon->capability & (1 << 0x2)) ? '1' : '0',
1065                              (beacon->capability & (1 << 0x1)) ? '1' : '0',
1066                              (beacon->capability & (1 << 0x0)) ? '1' : '0');
1067
1068         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1069                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1070                                      escape_essid(info_element->data,
1071                                                   info_element->len),
1072                                      MAC_ARG(beacon->header.addr3),
1073                                      WLAN_FC_GET_STYPE(beacon->header.
1074                                                        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 #ifdef CONFIG_IEEE80211_DEBUG
1121                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1122                                      escape_essid(network.ssid,
1123                                                   network.ssid_len),
1124                                      MAC_ARG(network.bssid),
1125                                      WLAN_FC_GET_STYPE(beacon->header.
1126                                                        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.
1138                                                        frame_ctl) ==
1139                                      IEEE80211_STYPE_PROBE_RESP ?
1140                                      "PROBE RESPONSE" : "BEACON");
1141                 update_network(target, &network);
1142         }
1143
1144         spin_unlock_irqrestore(&ieee->lock, flags);
1145 }
1146
1147 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1148                       struct ieee80211_hdr *header,
1149                       struct ieee80211_rx_stats *stats)
1150 {
1151         switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
1152         case IEEE80211_STYPE_ASSOC_RESP:
1153                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1154                                      WLAN_FC_GET_STYPE(header->frame_ctl));
1155                 break;
1156
1157         case IEEE80211_STYPE_REASSOC_RESP:
1158                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1159                                      WLAN_FC_GET_STYPE(header->frame_ctl));
1160                 break;
1161
1162         case IEEE80211_STYPE_PROBE_RESP:
1163                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1164                                      WLAN_FC_GET_STYPE(header->frame_ctl));
1165                 IEEE80211_DEBUG_SCAN("Probe response\n");
1166                 ieee80211_process_probe_response(ieee,
1167                                                  (struct
1168                                                   ieee80211_probe_response *)
1169                                                  header, stats);
1170                 break;
1171
1172         case IEEE80211_STYPE_BEACON:
1173                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1174                                      WLAN_FC_GET_STYPE(header->frame_ctl));
1175                 IEEE80211_DEBUG_SCAN("Beacon\n");
1176                 ieee80211_process_probe_response(ieee,
1177                                                  (struct
1178                                                   ieee80211_probe_response *)
1179                                                  header, stats);
1180                 break;
1181
1182         default:
1183                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1184                                      WLAN_FC_GET_STYPE(header->frame_ctl));
1185                 IEEE80211_WARNING("%s: Unknown management packet: %d\n",
1186                                   ieee->dev->name,
1187                                   WLAN_FC_GET_STYPE(header->frame_ctl));
1188                 break;
1189         }
1190 }
1191
1192 EXPORT_SYMBOL(ieee80211_rx_mgt);
1193 EXPORT_SYMBOL(ieee80211_rx);