1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Original code based Host AP (software wireless LAN access point) driver
4  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
5  *
6  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
7  * <j@w1.fi>
8  * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
9  * Copyright (c) 2004-2005, Intel Corporation
10  */
11 
12 #include <linux/compiler.h>
13 #include <linux/errno.h>
14 #include <linux/if_arp.h>
15 #include <linux/in6.h>
16 #include <linux/gfp.h>
17 #include <linux/in.h>
18 #include <linux/ip.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/netdevice.h>
22 #include <linux/proc_fs.h>
23 #include <linux/skbuff.h>
24 #include <linux/tcp.h>
25 #include <linux/types.h>
26 #include <linux/wireless.h>
27 #include <linux/etherdevice.h>
28 #include <linux/uaccess.h>
29 #include <linux/ctype.h>
30 
31 #include <net/lib80211.h>
32 
33 #include "libipw.h"
34 
35 static void libipw_monitor_rx(struct libipw_device *ieee,
36 					struct sk_buff *skb,
37 					struct libipw_rx_stats *rx_stats)
38 {
39 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
40 	u16 fc = le16_to_cpu(hdr->frame_control);
41 
42 	skb->dev = ieee->dev;
43 	skb_reset_mac_header(skb);
44 	skb_pull(skb, libipw_get_hdrlen(fc));
45 	skb->pkt_type = PACKET_OTHERHOST;
46 	skb->protocol = htons(ETH_P_80211_RAW);
47 	memset(skb->cb, 0, sizeof(skb->cb));
48 	netif_rx(skb);
49 }
50 
51 /* Called only as a tasklet (software IRQ) */
52 static struct libipw_frag_entry *libipw_frag_cache_find(struct
53 							      libipw_device
54 							      *ieee,
55 							      unsigned int seq,
56 							      unsigned int frag,
57 							      u8 * src,
58 							      u8 * dst)
59 {
60 	struct libipw_frag_entry *entry;
61 	int i;
62 
63 	for (i = 0; i < LIBIPW_FRAG_CACHE_LEN; i++) {
64 		entry = &ieee->frag_cache[i];
65 		if (entry->skb != NULL &&
66 		    time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
67 			LIBIPW_DEBUG_FRAG("expiring fragment cache entry "
68 					     "seq=%u last_frag=%u\n",
69 					     entry->seq, entry->last_frag);
70 			dev_kfree_skb_any(entry->skb);
71 			entry->skb = NULL;
72 		}
73 
74 		if (entry->skb != NULL && entry->seq == seq &&
75 		    (entry->last_frag + 1 == frag || frag == -1) &&
76 		    ether_addr_equal(entry->src_addr, src) &&
77 		    ether_addr_equal(entry->dst_addr, dst))
78 			return entry;
79 	}
80 
81 	return NULL;
82 }
83 
84 /* Called only as a tasklet (software IRQ) */
85 static struct sk_buff *libipw_frag_cache_get(struct libipw_device *ieee,
86 						struct libipw_hdr_4addr *hdr)
87 {
88 	struct sk_buff *skb = NULL;
89 	u16 sc;
90 	unsigned int frag, seq;
91 	struct libipw_frag_entry *entry;
92 
93 	sc = le16_to_cpu(hdr->seq_ctl);
94 	frag = WLAN_GET_SEQ_FRAG(sc);
95 	seq = WLAN_GET_SEQ_SEQ(sc);
96 
97 	if (frag == 0) {
98 		/* Reserve enough space to fit maximum frame length */
99 		skb = dev_alloc_skb(ieee->dev->mtu +
100 				    sizeof(struct libipw_hdr_4addr) +
101 				    8 /* LLC */  +
102 				    2 /* alignment */  +
103 				    8 /* WEP */  + ETH_ALEN /* WDS */ );
104 		if (skb == NULL)
105 			return NULL;
106 
107 		entry = &ieee->frag_cache[ieee->frag_next_idx];
108 		ieee->frag_next_idx++;
109 		if (ieee->frag_next_idx >= LIBIPW_FRAG_CACHE_LEN)
110 			ieee->frag_next_idx = 0;
111 
112 		if (entry->skb != NULL)
113 			dev_kfree_skb_any(entry->skb);
114 
115 		entry->first_frag_time = jiffies;
116 		entry->seq = seq;
117 		entry->last_frag = frag;
118 		entry->skb = skb;
119 		memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
120 		memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
121 	} else {
122 		/* received a fragment of a frame for which the head fragment
123 		 * should have already been received */
124 		entry = libipw_frag_cache_find(ieee, seq, frag, hdr->addr2,
125 						  hdr->addr1);
126 		if (entry != NULL) {
127 			entry->last_frag = frag;
128 			skb = entry->skb;
129 		}
130 	}
131 
132 	return skb;
133 }
134 
135 /* Called only as a tasklet (software IRQ) */
136 static int libipw_frag_cache_invalidate(struct libipw_device *ieee,
137 					   struct libipw_hdr_4addr *hdr)
138 {
139 	u16 sc;
140 	unsigned int seq;
141 	struct libipw_frag_entry *entry;
142 
143 	sc = le16_to_cpu(hdr->seq_ctl);
144 	seq = WLAN_GET_SEQ_SEQ(sc);
145 
146 	entry = libipw_frag_cache_find(ieee, seq, -1, hdr->addr2,
147 					  hdr->addr1);
148 
149 	if (entry == NULL) {
150 		LIBIPW_DEBUG_FRAG("could not invalidate fragment cache "
151 				     "entry (seq=%u)\n", seq);
152 		return -1;
153 	}
154 
155 	entry->skb = NULL;
156 	return 0;
157 }
158 
159 #ifdef NOT_YET
160 /* libipw_rx_frame_mgtmt
161  *
162  * Responsible for handling management control frames
163  *
164  * Called by libipw_rx */
165 static int
166 libipw_rx_frame_mgmt(struct libipw_device *ieee, struct sk_buff *skb,
167 			struct libipw_rx_stats *rx_stats, u16 type,
168 			u16 stype)
169 {
170 	if (ieee->iw_mode == IW_MODE_MASTER) {
171 		printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
172 		       ieee->dev->name);
173 		return 0;
174 /*
175   hostap_update_sta_ps(ieee, (struct hostap_libipw_hdr_4addr *)
176   skb->data);*/
177 	}
178 
179 	if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
180 		if (stype == WLAN_FC_STYPE_BEACON &&
181 		    ieee->iw_mode == IW_MODE_MASTER) {
182 			struct sk_buff *skb2;
183 			/* Process beacon frames also in kernel driver to
184 			 * update STA(AP) table statistics */
185 			skb2 = skb_clone(skb, GFP_ATOMIC);
186 			if (skb2)
187 				hostap_rx(skb2->dev, skb2, rx_stats);
188 		}
189 
190 		/* send management frames to the user space daemon for
191 		 * processing */
192 		ieee->apdevstats.rx_packets++;
193 		ieee->apdevstats.rx_bytes += skb->len;
194 		prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
195 		return 0;
196 	}
197 
198 	if (ieee->iw_mode == IW_MODE_MASTER) {
199 		if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
200 			printk(KERN_DEBUG "%s: unknown management frame "
201 			       "(type=0x%02x, stype=0x%02x) dropped\n",
202 			       skb->dev->name, type, stype);
203 			return -1;
204 		}
205 
206 		hostap_rx(skb->dev, skb, rx_stats);
207 		return 0;
208 	}
209 
210 	printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
211 	       "received in non-Host AP mode\n", skb->dev->name);
212 	return -1;
213 }
214 #endif
215 
216 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
217 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
218 static unsigned char libipw_rfc1042_header[] =
219     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
220 
221 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
222 static unsigned char libipw_bridge_tunnel_header[] =
223     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
224 /* No encapsulation header if EtherType < 0x600 (=length) */
225 
226 /* Called by libipw_rx_frame_decrypt */
227 static int libipw_is_eapol_frame(struct libipw_device *ieee,
228 				    struct sk_buff *skb)
229 {
230 	struct net_device *dev = ieee->dev;
231 	u16 fc, ethertype;
232 	struct libipw_hdr_3addr *hdr;
233 	u8 *pos;
234 
235 	if (skb->len < 24)
236 		return 0;
237 
238 	hdr = (struct libipw_hdr_3addr *)skb->data;
239 	fc = le16_to_cpu(hdr->frame_ctl);
240 
241 	/* check that the frame is unicast frame to us */
242 	if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
243 	    IEEE80211_FCTL_TODS &&
244 	    ether_addr_equal(hdr->addr1, dev->dev_addr) &&
245 	    ether_addr_equal(hdr->addr3, dev->dev_addr)) {
246 		/* ToDS frame with own addr BSSID and DA */
247 	} else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
248 		   IEEE80211_FCTL_FROMDS &&
249 		   ether_addr_equal(hdr->addr1, dev->dev_addr)) {
250 		/* FromDS frame with own addr as DA */
251 	} else
252 		return 0;
253 
254 	if (skb->len < 24 + 8)
255 		return 0;
256 
257 	/* check for port access entity Ethernet type */
258 	pos = skb->data + 24;
259 	ethertype = (pos[6] << 8) | pos[7];
260 	if (ethertype == ETH_P_PAE)
261 		return 1;
262 
263 	return 0;
264 }
265 
266 /* Called only as a tasklet (software IRQ), by libipw_rx */
267 static int
268 libipw_rx_frame_decrypt(struct libipw_device *ieee, struct sk_buff *skb,
269 			   struct lib80211_crypt_data *crypt)
270 {
271 	struct libipw_hdr_3addr *hdr;
272 	int res, hdrlen;
273 
274 	if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
275 		return 0;
276 
277 	hdr = (struct libipw_hdr_3addr *)skb->data;
278 	hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
279 
280 	atomic_inc(&crypt->refcnt);
281 	res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
282 	atomic_dec(&crypt->refcnt);
283 	if (res < 0) {
284 		LIBIPW_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
285 				     hdr->addr2, res);
286 		if (res == -2)
287 			LIBIPW_DEBUG_DROP("Decryption failed ICV "
288 					     "mismatch (key %d)\n",
289 					     skb->data[hdrlen + 3] >> 6);
290 		ieee->ieee_stats.rx_discards_undecryptable++;
291 		return -1;
292 	}
293 
294 	return res;
295 }
296 
297 /* Called only as a tasklet (software IRQ), by libipw_rx */
298 static int
299 libipw_rx_frame_decrypt_msdu(struct libipw_device *ieee,
300 				struct sk_buff *skb, int keyidx,
301 				struct lib80211_crypt_data *crypt)
302 {
303 	struct libipw_hdr_3addr *hdr;
304 	int res, hdrlen;
305 
306 	if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
307 		return 0;
308 
309 	hdr = (struct libipw_hdr_3addr *)skb->data;
310 	hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
311 
312 	atomic_inc(&crypt->refcnt);
313 	res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
314 	atomic_dec(&crypt->refcnt);
315 	if (res < 0) {
316 		printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
317 		       " (SA=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
318 		       keyidx);
319 		return -1;
320 	}
321 
322 	return 0;
323 }
324 
325 /* All received frames are sent to this function. @skb contains the frame in
326  * IEEE 802.11 format, i.e., in the format it was sent over air.
327  * This function is called only as a tasklet (software IRQ). */
328 int libipw_rx(struct libipw_device *ieee, struct sk_buff *skb,
329 		 struct libipw_rx_stats *rx_stats)
330 {
331 	struct net_device *dev = ieee->dev;
332 	struct libipw_hdr_4addr *hdr;
333 	size_t hdrlen;
334 	u16 fc, type, stype, sc;
335 	unsigned int frag;
336 	u8 *payload;
337 	u16 ethertype;
338 #ifdef NOT_YET
339 	struct net_device *wds = NULL;
340 	struct sk_buff *skb2 = NULL;
341 	struct net_device *wds = NULL;
342 	int frame_authorized = 0;
343 	int from_assoc_ap = 0;
344 	void *sta = NULL;
345 #endif
346 	u8 dst[ETH_ALEN];
347 	u8 src[ETH_ALEN];
348 	struct lib80211_crypt_data *crypt = NULL;
349 	int keyidx = 0;
350 	int can_be_decrypted = 0;
351 
352 	hdr = (struct libipw_hdr_4addr *)skb->data;
353 	if (skb->len < 10) {
354 		printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
355 		goto rx_dropped;
356 	}
357 
358 	fc = le16_to_cpu(hdr->frame_ctl);
359 	type = WLAN_FC_GET_TYPE(fc);
360 	stype = WLAN_FC_GET_STYPE(fc);
361 	sc = le16_to_cpu(hdr->seq_ctl);
362 	frag = WLAN_GET_SEQ_FRAG(sc);
363 	hdrlen = libipw_get_hdrlen(fc);
364 
365 	if (skb->len < hdrlen) {
366 		printk(KERN_INFO "%s: invalid SKB length %d\n",
367 			dev->name, skb->len);
368 		goto rx_dropped;
369 	}
370 
371 	/* Put this code here so that we avoid duplicating it in all
372 	 * Rx paths. - Jean II */
373 #ifdef CONFIG_WIRELESS_EXT
374 #ifdef IW_WIRELESS_SPY		/* defined in iw_handler.h */
375 	/* If spy monitoring on */
376 	if (ieee->spy_data.spy_number > 0) {
377 		struct iw_quality wstats;
378 
379 		wstats.updated = 0;
380 		if (rx_stats->mask & LIBIPW_STATMASK_RSSI) {
381 			wstats.level = rx_stats->signal;
382 			wstats.updated |= IW_QUAL_LEVEL_UPDATED;
383 		} else
384 			wstats.updated |= IW_QUAL_LEVEL_INVALID;
385 
386 		if (rx_stats->mask & LIBIPW_STATMASK_NOISE) {
387 			wstats.noise = rx_stats->noise;
388 			wstats.updated |= IW_QUAL_NOISE_UPDATED;
389 		} else
390 			wstats.updated |= IW_QUAL_NOISE_INVALID;
391 
392 		if (rx_stats->mask & LIBIPW_STATMASK_SIGNAL) {
393 			wstats.qual = rx_stats->signal;
394 			wstats.updated |= IW_QUAL_QUAL_UPDATED;
395 		} else
396 			wstats.updated |= IW_QUAL_QUAL_INVALID;
397 
398 		/* Update spy records */
399 		wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
400 	}
401 #endif				/* IW_WIRELESS_SPY */
402 #endif				/* CONFIG_WIRELESS_EXT */
403 
404 #ifdef NOT_YET
405 	hostap_update_rx_stats(local->ap, hdr, rx_stats);
406 #endif
407 
408 	if (ieee->iw_mode == IW_MODE_MONITOR) {
409 		dev->stats.rx_packets++;
410 		dev->stats.rx_bytes += skb->len;
411 		libipw_monitor_rx(ieee, skb, rx_stats);
412 		return 1;
413 	}
414 
415 	can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
416 			    is_broadcast_ether_addr(hdr->addr2)) ?
417 	    ieee->host_mc_decrypt : ieee->host_decrypt;
418 
419 	if (can_be_decrypted) {
420 		if (skb->len >= hdrlen + 3) {
421 			/* Top two-bits of byte 3 are the key index */
422 			keyidx = skb->data[hdrlen + 3] >> 6;
423 		}
424 
425 		/* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
426 		 * is only allowed 2-bits of storage, no value of keyidx can
427 		 * be provided via above code that would result in keyidx
428 		 * being out of range */
429 		crypt = ieee->crypt_info.crypt[keyidx];
430 
431 #ifdef NOT_YET
432 		sta = NULL;
433 
434 		/* Use station specific key to override default keys if the
435 		 * receiver address is a unicast address ("individual RA"). If
436 		 * bcrx_sta_key parameter is set, station specific key is used
437 		 * even with broad/multicast targets (this is against IEEE
438 		 * 802.11, but makes it easier to use different keys with
439 		 * stations that do not support WEP key mapping). */
440 
441 		if (is_unicast_ether_addr(hdr->addr1) || local->bcrx_sta_key)
442 			(void)hostap_handle_sta_crypto(local, hdr, &crypt,
443 						       &sta);
444 #endif
445 
446 		/* allow NULL decrypt to indicate an station specific override
447 		 * for default encryption */
448 		if (crypt && (crypt->ops == NULL ||
449 			      crypt->ops->decrypt_mpdu == NULL))
450 			crypt = NULL;
451 
452 		if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
453 			/* This seems to be triggered by some (multicast?)
454 			 * frames from other than current BSS, so just drop the
455 			 * frames silently instead of filling system log with
456 			 * these reports. */
457 			LIBIPW_DEBUG_DROP("Decryption failed (not set)"
458 					     " (SA=%pM)\n", hdr->addr2);
459 			ieee->ieee_stats.rx_discards_undecryptable++;
460 			goto rx_dropped;
461 		}
462 	}
463 #ifdef NOT_YET
464 	if (type != WLAN_FC_TYPE_DATA) {
465 		if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
466 		    fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
467 		    (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
468 			printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
469 			       "from %pM\n", dev->name, hdr->addr2);
470 			/* TODO: could inform hostapd about this so that it
471 			 * could send auth failure report */
472 			goto rx_dropped;
473 		}
474 
475 		if (libipw_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
476 			goto rx_dropped;
477 		else
478 			goto rx_exit;
479 	}
480 #endif
481 	/* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
482 	if (sc == ieee->prev_seq_ctl)
483 		goto rx_dropped;
484 	else
485 		ieee->prev_seq_ctl = sc;
486 
487 	/* Data frame - extract src/dst addresses */
488 	if (skb->len < LIBIPW_3ADDR_LEN)
489 		goto rx_dropped;
490 
491 	switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
492 	case IEEE80211_FCTL_FROMDS:
493 		memcpy(dst, hdr->addr1, ETH_ALEN);
494 		memcpy(src, hdr->addr3, ETH_ALEN);
495 		break;
496 	case IEEE80211_FCTL_TODS:
497 		memcpy(dst, hdr->addr3, ETH_ALEN);
498 		memcpy(src, hdr->addr2, ETH_ALEN);
499 		break;
500 	case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
501 		if (skb->len < LIBIPW_4ADDR_LEN)
502 			goto rx_dropped;
503 		memcpy(dst, hdr->addr3, ETH_ALEN);
504 		memcpy(src, hdr->addr4, ETH_ALEN);
505 		break;
506 	default:
507 		memcpy(dst, hdr->addr1, ETH_ALEN);
508 		memcpy(src, hdr->addr2, ETH_ALEN);
509 		break;
510 	}
511 
512 #ifdef NOT_YET
513 	if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
514 		goto rx_dropped;
515 	if (wds) {
516 		skb->dev = dev = wds;
517 		stats = hostap_get_stats(dev);
518 	}
519 
520 	if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
521 	    (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
522 	    IEEE80211_FCTL_FROMDS && ieee->stadev &&
523 	    ether_addr_equal(hdr->addr2, ieee->assoc_ap_addr)) {
524 		/* Frame from BSSID of the AP for which we are a client */
525 		skb->dev = dev = ieee->stadev;
526 		stats = hostap_get_stats(dev);
527 		from_assoc_ap = 1;
528 	}
529 #endif
530 
531 #ifdef NOT_YET
532 	if ((ieee->iw_mode == IW_MODE_MASTER ||
533 	     ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
534 		switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
535 					     wds != NULL)) {
536 		case AP_RX_CONTINUE_NOT_AUTHORIZED:
537 			frame_authorized = 0;
538 			break;
539 		case AP_RX_CONTINUE:
540 			frame_authorized = 1;
541 			break;
542 		case AP_RX_DROP:
543 			goto rx_dropped;
544 		case AP_RX_EXIT:
545 			goto rx_exit;
546 		}
547 	}
548 #endif
549 
550 	/* Nullfunc frames may have PS-bit set, so they must be passed to
551 	 * hostap_handle_sta_rx() before being dropped here. */
552 
553 	stype &= ~IEEE80211_STYPE_QOS_DATA;
554 
555 	if (stype != IEEE80211_STYPE_DATA &&
556 	    stype != IEEE80211_STYPE_DATA_CFACK &&
557 	    stype != IEEE80211_STYPE_DATA_CFPOLL &&
558 	    stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
559 		if (stype != IEEE80211_STYPE_NULLFUNC)
560 			LIBIPW_DEBUG_DROP("RX: dropped data frame "
561 					     "with no data (type=0x%02x, "
562 					     "subtype=0x%02x, len=%d)\n",
563 					     type, stype, skb->len);
564 		goto rx_dropped;
565 	}
566 
567 	/* skb: hdr + (possibly fragmented, possibly encrypted) payload */
568 
569 	if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
570 	    (keyidx = libipw_rx_frame_decrypt(ieee, skb, crypt)) < 0)
571 		goto rx_dropped;
572 
573 	hdr = (struct libipw_hdr_4addr *)skb->data;
574 
575 	/* skb: hdr + (possibly fragmented) plaintext payload */
576 	// PR: FIXME: hostap has additional conditions in the "if" below:
577 	// ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
578 	if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
579 		int flen;
580 		struct sk_buff *frag_skb = libipw_frag_cache_get(ieee, hdr);
581 		LIBIPW_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
582 
583 		if (!frag_skb) {
584 			LIBIPW_DEBUG(LIBIPW_DL_RX | LIBIPW_DL_FRAG,
585 					"Rx cannot get skb from fragment "
586 					"cache (morefrag=%d seq=%u frag=%u)\n",
587 					(fc & IEEE80211_FCTL_MOREFRAGS) != 0,
588 					WLAN_GET_SEQ_SEQ(sc), frag);
589 			goto rx_dropped;
590 		}
591 
592 		flen = skb->len;
593 		if (frag != 0)
594 			flen -= hdrlen;
595 
596 		if (frag_skb->tail + flen > frag_skb->end) {
597 			printk(KERN_WARNING "%s: host decrypted and "
598 			       "reassembled frame did not fit skb\n",
599 			       dev->name);
600 			libipw_frag_cache_invalidate(ieee, hdr);
601 			goto rx_dropped;
602 		}
603 
604 		if (frag == 0) {
605 			/* copy first fragment (including full headers) into
606 			 * beginning of the fragment cache skb */
607 			skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
608 		} else {
609 			/* append frame payload to the end of the fragment
610 			 * cache skb */
611 			skb_copy_from_linear_data_offset(skb, hdrlen,
612 				      skb_put(frag_skb, flen), flen);
613 		}
614 		dev_kfree_skb_any(skb);
615 		skb = NULL;
616 
617 		if (fc & IEEE80211_FCTL_MOREFRAGS) {
618 			/* more fragments expected - leave the skb in fragment
619 			 * cache for now; it will be delivered to upper layers
620 			 * after all fragments have been received */
621 			goto rx_exit;
622 		}
623 
624 		/* this was the last fragment and the frame will be
625 		 * delivered, so remove skb from fragment cache */
626 		skb = frag_skb;
627 		hdr = (struct libipw_hdr_4addr *)skb->data;
628 		libipw_frag_cache_invalidate(ieee, hdr);
629 	}
630 
631 	/* skb: hdr + (possible reassembled) full MSDU payload; possibly still
632 	 * encrypted/authenticated */
633 	if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
634 	    libipw_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
635 		goto rx_dropped;
636 
637 	hdr = (struct libipw_hdr_4addr *)skb->data;
638 	if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
639 		if (		/*ieee->ieee802_1x && */
640 			   libipw_is_eapol_frame(ieee, skb)) {
641 			/* pass unencrypted EAPOL frames even if encryption is
642 			 * configured */
643 		} else {
644 			LIBIPW_DEBUG_DROP("encryption configured, but RX "
645 					     "frame not encrypted (SA=%pM)\n",
646 					     hdr->addr2);
647 			goto rx_dropped;
648 		}
649 	}
650 
651 	if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
652 	    !libipw_is_eapol_frame(ieee, skb)) {
653 		LIBIPW_DEBUG_DROP("dropped unencrypted RX data "
654 				     "frame from %pM (drop_unencrypted=1)\n",
655 				     hdr->addr2);
656 		goto rx_dropped;
657 	}
658 
659 	/* If the frame was decrypted in hardware, we may need to strip off
660 	 * any security data (IV, ICV, etc) that was left behind */
661 	if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
662 	    ieee->host_strip_iv_icv) {
663 		int trimlen = 0;
664 
665 		/* Top two-bits of byte 3 are the key index */
666 		if (skb->len >= hdrlen + 3)
667 			keyidx = skb->data[hdrlen + 3] >> 6;
668 
669 		/* To strip off any security data which appears before the
670 		 * payload, we simply increase hdrlen (as the header gets
671 		 * chopped off immediately below). For the security data which
672 		 * appears after the payload, we use skb_trim. */
673 
674 		switch (ieee->sec.encode_alg[keyidx]) {
675 		case SEC_ALG_WEP:
676 			/* 4 byte IV */
677 			hdrlen += 4;
678 			/* 4 byte ICV */
679 			trimlen = 4;
680 			break;
681 		case SEC_ALG_TKIP:
682 			/* 4 byte IV, 4 byte ExtIV */
683 			hdrlen += 8;
684 			/* 8 byte MIC, 4 byte ICV */
685 			trimlen = 12;
686 			break;
687 		case SEC_ALG_CCMP:
688 			/* 8 byte CCMP header */
689 			hdrlen += 8;
690 			/* 8 byte MIC */
691 			trimlen = 8;
692 			break;
693 		}
694 
695 		if (skb->len < trimlen)
696 			goto rx_dropped;
697 
698 		__skb_trim(skb, skb->len - trimlen);
699 
700 		if (skb->len < hdrlen)
701 			goto rx_dropped;
702 	}
703 
704 	/* skb: hdr + (possible reassembled) full plaintext payload */
705 
706 	payload = skb->data + hdrlen;
707 	ethertype = (payload[6] << 8) | payload[7];
708 
709 #ifdef NOT_YET
710 	/* If IEEE 802.1X is used, check whether the port is authorized to send
711 	 * the received frame. */
712 	if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
713 		if (ethertype == ETH_P_PAE) {
714 			printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
715 			       dev->name);
716 			if (ieee->hostapd && ieee->apdev) {
717 				/* Send IEEE 802.1X frames to the user
718 				 * space daemon for processing */
719 				prism2_rx_80211(ieee->apdev, skb, rx_stats,
720 						PRISM2_RX_MGMT);
721 				ieee->apdevstats.rx_packets++;
722 				ieee->apdevstats.rx_bytes += skb->len;
723 				goto rx_exit;
724 			}
725 		} else if (!frame_authorized) {
726 			printk(KERN_DEBUG "%s: dropped frame from "
727 			       "unauthorized port (IEEE 802.1X): "
728 			       "ethertype=0x%04x\n", dev->name, ethertype);
729 			goto rx_dropped;
730 		}
731 	}
732 #endif
733 
734 	/* convert hdr + possible LLC headers into Ethernet header */
735 	if (skb->len - hdrlen >= 8 &&
736 	    ((memcmp(payload, libipw_rfc1042_header, SNAP_SIZE) == 0 &&
737 	      ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
738 	     memcmp(payload, libipw_bridge_tunnel_header, SNAP_SIZE) == 0)) {
739 		/* remove RFC1042 or Bridge-Tunnel encapsulation and
740 		 * replace EtherType */
741 		skb_pull(skb, hdrlen + SNAP_SIZE);
742 		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
743 		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
744 	} else {
745 		__be16 len;
746 		/* Leave Ethernet header part of hdr and full payload */
747 		skb_pull(skb, hdrlen);
748 		len = htons(skb->len);
749 		memcpy(skb_push(skb, 2), &len, 2);
750 		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
751 		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
752 	}
753 
754 #ifdef NOT_YET
755 	if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
756 		    IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
757 		/* Non-standard frame: get addr4 from its bogus location after
758 		 * the payload */
759 		skb_copy_to_linear_data_offset(skb, ETH_ALEN,
760 					       skb->data + skb->len - ETH_ALEN,
761 					       ETH_ALEN);
762 		skb_trim(skb, skb->len - ETH_ALEN);
763 	}
764 #endif
765 
766 	dev->stats.rx_packets++;
767 	dev->stats.rx_bytes += skb->len;
768 
769 #ifdef NOT_YET
770 	if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
771 		if (is_multicast_ether_addr(dst)) {
772 			/* copy multicast frame both to the higher layers and
773 			 * to the wireless media */
774 			ieee->ap->bridged_multicast++;
775 			skb2 = skb_clone(skb, GFP_ATOMIC);
776 			if (skb2 == NULL)
777 				printk(KERN_DEBUG "%s: skb_clone failed for "
778 				       "multicast frame\n", dev->name);
779 		} else if (hostap_is_sta_assoc(ieee->ap, dst)) {
780 			/* send frame directly to the associated STA using
781 			 * wireless media and not passing to higher layers */
782 			ieee->ap->bridged_unicast++;
783 			skb2 = skb;
784 			skb = NULL;
785 		}
786 	}
787 
788 	if (skb2 != NULL) {
789 		/* send to wireless media */
790 		skb2->dev = dev;
791 		skb2->protocol = htons(ETH_P_802_3);
792 		skb_reset_mac_header(skb2);
793 		skb_reset_network_header(skb2);
794 		/* skb2->network_header += ETH_HLEN; */
795 		dev_queue_xmit(skb2);
796 	}
797 #endif
798 
799 	if (skb) {
800 		skb->protocol = eth_type_trans(skb, dev);
801 		memset(skb->cb, 0, sizeof(skb->cb));
802 		skb->ip_summed = CHECKSUM_NONE;	/* 802.11 crc not sufficient */
803 		if (netif_rx(skb) == NET_RX_DROP) {
804 			/* netif_rx always succeeds, but it might drop
805 			 * the packet.  If it drops the packet, we log that
806 			 * in our stats. */
807 			LIBIPW_DEBUG_DROP
808 			    ("RX: netif_rx dropped the packet\n");
809 			dev->stats.rx_dropped++;
810 		}
811 	}
812 
813       rx_exit:
814 #ifdef NOT_YET
815 	if (sta)
816 		hostap_handle_sta_release(sta);
817 #endif
818 	return 1;
819 
820       rx_dropped:
821 	dev->stats.rx_dropped++;
822 
823 	/* Returning 0 indicates to caller that we have not handled the SKB--
824 	 * so it is still allocated and can be used again by underlying
825 	 * hardware as a DMA target */
826 	return 0;
827 }
828 
829 /* Filter out unrelated packets, call libipw_rx[_mgt]
830  * This function takes over the skb, it should not be used again after calling
831  * this function. */
832 void libipw_rx_any(struct libipw_device *ieee,
833 		     struct sk_buff *skb, struct libipw_rx_stats *stats)
834 {
835 	struct libipw_hdr_4addr *hdr;
836 	int is_packet_for_us;
837 	u16 fc;
838 
839 	if (ieee->iw_mode == IW_MODE_MONITOR) {
840 		if (!libipw_rx(ieee, skb, stats))
841 			dev_kfree_skb_irq(skb);
842 		return;
843 	}
844 
845 	if (skb->len < sizeof(struct ieee80211_hdr))
846 		goto drop_free;
847 
848 	hdr = (struct libipw_hdr_4addr *)skb->data;
849 	fc = le16_to_cpu(hdr->frame_ctl);
850 
851 	if ((fc & IEEE80211_FCTL_VERS) != 0)
852 		goto drop_free;
853 
854 	switch (fc & IEEE80211_FCTL_FTYPE) {
855 	case IEEE80211_FTYPE_MGMT:
856 		if (skb->len < sizeof(struct libipw_hdr_3addr))
857 			goto drop_free;
858 		libipw_rx_mgt(ieee, hdr, stats);
859 		dev_kfree_skb_irq(skb);
860 		return;
861 	case IEEE80211_FTYPE_DATA:
862 		break;
863 	case IEEE80211_FTYPE_CTL:
864 		return;
865 	default:
866 		return;
867 	}
868 
869 	is_packet_for_us = 0;
870 	switch (ieee->iw_mode) {
871 	case IW_MODE_ADHOC:
872 		/* our BSS and not from/to DS */
873 		if (ether_addr_equal(hdr->addr3, ieee->bssid))
874 		if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
875 			/* promisc: get all */
876 			if (ieee->dev->flags & IFF_PROMISC)
877 				is_packet_for_us = 1;
878 			/* to us */
879 			else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
880 				is_packet_for_us = 1;
881 			/* mcast */
882 			else if (is_multicast_ether_addr(hdr->addr1))
883 				is_packet_for_us = 1;
884 		}
885 		break;
886 	case IW_MODE_INFRA:
887 		/* our BSS (== from our AP) and from DS */
888 		if (ether_addr_equal(hdr->addr2, ieee->bssid))
889 		if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
890 			/* promisc: get all */
891 			if (ieee->dev->flags & IFF_PROMISC)
892 				is_packet_for_us = 1;
893 			/* to us */
894 			else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
895 				is_packet_for_us = 1;
896 			/* mcast */
897 			else if (is_multicast_ether_addr(hdr->addr1)) {
898 				/* not our own packet bcasted from AP */
899 				if (!ether_addr_equal(hdr->addr3, ieee->dev->dev_addr))
900 					is_packet_for_us = 1;
901 			}
902 		}
903 		break;
904 	default:
905 		/* ? */
906 		break;
907 	}
908 
909 	if (is_packet_for_us)
910 		if (!libipw_rx(ieee, skb, stats))
911 			dev_kfree_skb_irq(skb);
912 	return;
913 
914 drop_free:
915 	dev_kfree_skb_irq(skb);
916 	ieee->dev->stats.rx_dropped++;
917 }
918 
919 #define MGMT_FRAME_FIXED_PART_LENGTH		0x24
920 
921 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
922 
923 /*
924 * Make the structure we read from the beacon packet to have
925 * the right values
926 */
927 static int libipw_verify_qos_info(struct libipw_qos_information_element
928 				     *info_element, int sub_type)
929 {
930 	if (info_element->elementID != QOS_ELEMENT_ID)
931 		return -1;
932 	if (info_element->qui_subtype != sub_type)
933 		return -1;
934 	if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
935 		return -1;
936 	if (info_element->qui_type != QOS_OUI_TYPE)
937 		return -1;
938 	if (info_element->version != QOS_VERSION_1)
939 		return -1;
940 
941 	return 0;
942 }
943 
944 /*
945  * Parse a QoS parameter element
946  */
947 static int libipw_read_qos_param_element(
948 			struct libipw_qos_parameter_info *element_param,
949 			struct libipw_info_element *info_element)
950 {
951 	size_t size = sizeof(*element_param);
952 
953 	if (!element_param || !info_element || info_element->len != size - 2)
954 		return -1;
955 
956 	memcpy(element_param, info_element, size);
957 	return libipw_verify_qos_info(&element_param->info_element,
958 				      QOS_OUI_PARAM_SUB_TYPE);
959 }
960 
961 /*
962  * Parse a QoS information element
963  */
964 static int libipw_read_qos_info_element(
965 			struct libipw_qos_information_element *element_info,
966 			struct libipw_info_element *info_element)
967 {
968 	size_t size = sizeof(struct libipw_qos_information_element) - 2;
969 
970 	if (!element_info || !info_element || info_element->len != size - 2)
971 		return -1;
972 
973 	memcpy(element_info, info_element, size);
974 	return libipw_verify_qos_info(element_info, QOS_OUI_INFO_SUB_TYPE);
975 }
976 
977 /*
978  * Write QoS parameters from the ac parameters.
979  */
980 static void libipw_qos_convert_ac_to_parameters(struct
981 						  libipw_qos_parameter_info
982 						  *param_elm, struct
983 						  libipw_qos_parameters
984 						  *qos_param)
985 {
986 	int i;
987 	struct libipw_qos_ac_parameter *ac_params;
988 	u32 txop;
989 	u8 cw_min;
990 	u8 cw_max;
991 
992 	for (i = 0; i < QOS_QUEUE_NUM; i++) {
993 		ac_params = &(param_elm->ac_params_record[i]);
994 
995 		qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
996 		qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
997 
998 		cw_min = ac_params->ecw_min_max & 0x0F;
999 		qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1000 
1001 		cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1002 		qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1003 
1004 		qos_param->flag[i] =
1005 		    (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1006 
1007 		txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1008 		qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1009 	}
1010 }
1011 
1012 /*
1013  * we have a generic data element which it may contain QoS information or
1014  * parameters element. check the information element length to decide
1015  * which type to read
1016  */
1017 static int libipw_parse_qos_info_param_IE(struct libipw_info_element
1018 					     *info_element,
1019 					     struct libipw_network *network)
1020 {
1021 	int rc = 0;
1022 	struct libipw_qos_parameters *qos_param = NULL;
1023 	struct libipw_qos_information_element qos_info_element;
1024 
1025 	rc = libipw_read_qos_info_element(&qos_info_element, info_element);
1026 
1027 	if (rc == 0) {
1028 		network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1029 		network->flags |= NETWORK_HAS_QOS_INFORMATION;
1030 	} else {
1031 		struct libipw_qos_parameter_info param_element;
1032 
1033 		rc = libipw_read_qos_param_element(&param_element,
1034 						      info_element);
1035 		if (rc == 0) {
1036 			qos_param = &(network->qos_data.parameters);
1037 			libipw_qos_convert_ac_to_parameters(&param_element,
1038 							       qos_param);
1039 			network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1040 			network->qos_data.param_count =
1041 			    param_element.info_element.ac_info & 0x0F;
1042 		}
1043 	}
1044 
1045 	if (rc == 0) {
1046 		LIBIPW_DEBUG_QOS("QoS is supported\n");
1047 		network->qos_data.supported = 1;
1048 	}
1049 	return rc;
1050 }
1051 
1052 #ifdef CONFIG_LIBIPW_DEBUG
1053 #define MFIE_STRING(x) case WLAN_EID_ ##x: return #x
1054 
1055 static const char *get_info_element_string(u16 id)
1056 {
1057 	switch (id) {
1058 		MFIE_STRING(SSID);
1059 		MFIE_STRING(SUPP_RATES);
1060 		MFIE_STRING(FH_PARAMS);
1061 		MFIE_STRING(DS_PARAMS);
1062 		MFIE_STRING(CF_PARAMS);
1063 		MFIE_STRING(TIM);
1064 		MFIE_STRING(IBSS_PARAMS);
1065 		MFIE_STRING(COUNTRY);
1066 		MFIE_STRING(REQUEST);
1067 		MFIE_STRING(CHALLENGE);
1068 		MFIE_STRING(PWR_CONSTRAINT);
1069 		MFIE_STRING(PWR_CAPABILITY);
1070 		MFIE_STRING(TPC_REQUEST);
1071 		MFIE_STRING(TPC_REPORT);
1072 		MFIE_STRING(SUPPORTED_CHANNELS);
1073 		MFIE_STRING(CHANNEL_SWITCH);
1074 		MFIE_STRING(MEASURE_REQUEST);
1075 		MFIE_STRING(MEASURE_REPORT);
1076 		MFIE_STRING(QUIET);
1077 		MFIE_STRING(IBSS_DFS);
1078 		MFIE_STRING(ERP_INFO);
1079 		MFIE_STRING(RSN);
1080 		MFIE_STRING(EXT_SUPP_RATES);
1081 		MFIE_STRING(VENDOR_SPECIFIC);
1082 		MFIE_STRING(QOS_PARAMETER);
1083 	default:
1084 		return "UNKNOWN";
1085 	}
1086 }
1087 #endif
1088 
1089 static int libipw_parse_info_param(struct libipw_info_element
1090 				      *info_element, u16 length,
1091 				      struct libipw_network *network)
1092 {
1093 	u8 i;
1094 #ifdef CONFIG_LIBIPW_DEBUG
1095 	char rates_str[64];
1096 	char *p;
1097 #endif
1098 
1099 	while (length >= sizeof(*info_element)) {
1100 		if (sizeof(*info_element) + info_element->len > length) {
1101 			LIBIPW_DEBUG_MGMT("Info elem: parse failed: "
1102 					     "info_element->len + 2 > left : "
1103 					     "info_element->len+2=%zd left=%d, id=%d.\n",
1104 					     info_element->len +
1105 					     sizeof(*info_element),
1106 					     length, info_element->id);
1107 			/* We stop processing but don't return an error here
1108 			 * because some misbehaviour APs break this rule. ie.
1109 			 * Orinoco AP1000. */
1110 			break;
1111 		}
1112 
1113 		switch (info_element->id) {
1114 		case WLAN_EID_SSID:
1115 			network->ssid_len = min(info_element->len,
1116 						(u8) IW_ESSID_MAX_SIZE);
1117 			memcpy(network->ssid, info_element->data,
1118 			       network->ssid_len);
1119 			if (network->ssid_len < IW_ESSID_MAX_SIZE)
1120 				memset(network->ssid + network->ssid_len, 0,
1121 				       IW_ESSID_MAX_SIZE - network->ssid_len);
1122 
1123 			LIBIPW_DEBUG_MGMT("WLAN_EID_SSID: '%*pE' len=%d.\n",
1124 					  network->ssid_len, network->ssid,
1125 					  network->ssid_len);
1126 			break;
1127 
1128 		case WLAN_EID_SUPP_RATES:
1129 #ifdef CONFIG_LIBIPW_DEBUG
1130 			p = rates_str;
1131 #endif
1132 			network->rates_len = min(info_element->len,
1133 						 MAX_RATES_LENGTH);
1134 			for (i = 0; i < network->rates_len; i++) {
1135 				network->rates[i] = info_element->data[i];
1136 #ifdef CONFIG_LIBIPW_DEBUG
1137 				p += scnprintf(p, sizeof(rates_str) -
1138 					      (p - rates_str), "%02X ",
1139 					      network->rates[i]);
1140 #endif
1141 				if (libipw_is_ofdm_rate
1142 				    (info_element->data[i])) {
1143 					network->flags |= NETWORK_HAS_OFDM;
1144 					if (info_element->data[i] &
1145 					    LIBIPW_BASIC_RATE_MASK)
1146 						network->flags &=
1147 						    ~NETWORK_HAS_CCK;
1148 				}
1149 			}
1150 
1151 			LIBIPW_DEBUG_MGMT("WLAN_EID_SUPP_RATES: '%s' (%d)\n",
1152 					     rates_str, network->rates_len);
1153 			break;
1154 
1155 		case WLAN_EID_EXT_SUPP_RATES:
1156 #ifdef CONFIG_LIBIPW_DEBUG
1157 			p = rates_str;
1158 #endif
1159 			network->rates_ex_len = min(info_element->len,
1160 						    MAX_RATES_EX_LENGTH);
1161 			for (i = 0; i < network->rates_ex_len; i++) {
1162 				network->rates_ex[i] = info_element->data[i];
1163 #ifdef CONFIG_LIBIPW_DEBUG
1164 				p += scnprintf(p, sizeof(rates_str) -
1165 					      (p - rates_str), "%02X ",
1166 					      network->rates_ex[i]);
1167 #endif
1168 				if (libipw_is_ofdm_rate
1169 				    (info_element->data[i])) {
1170 					network->flags |= NETWORK_HAS_OFDM;
1171 					if (info_element->data[i] &
1172 					    LIBIPW_BASIC_RATE_MASK)
1173 						network->flags &=
1174 						    ~NETWORK_HAS_CCK;
1175 				}
1176 			}
1177 
1178 			LIBIPW_DEBUG_MGMT("WLAN_EID_EXT_SUPP_RATES: '%s' (%d)\n",
1179 					     rates_str, network->rates_ex_len);
1180 			break;
1181 
1182 		case WLAN_EID_DS_PARAMS:
1183 			LIBIPW_DEBUG_MGMT("WLAN_EID_DS_PARAMS: %d\n",
1184 					     info_element->data[0]);
1185 			network->channel = info_element->data[0];
1186 			break;
1187 
1188 		case WLAN_EID_FH_PARAMS:
1189 			LIBIPW_DEBUG_MGMT("WLAN_EID_FH_PARAMS: ignored\n");
1190 			break;
1191 
1192 		case WLAN_EID_CF_PARAMS:
1193 			LIBIPW_DEBUG_MGMT("WLAN_EID_CF_PARAMS: ignored\n");
1194 			break;
1195 
1196 		case WLAN_EID_TIM:
1197 			network->tim.tim_count = info_element->data[0];
1198 			network->tim.tim_period = info_element->data[1];
1199 			LIBIPW_DEBUG_MGMT("WLAN_EID_TIM: partially ignored\n");
1200 			break;
1201 
1202 		case WLAN_EID_ERP_INFO:
1203 			network->erp_value = info_element->data[0];
1204 			network->flags |= NETWORK_HAS_ERP_VALUE;
1205 			LIBIPW_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1206 					     network->erp_value);
1207 			break;
1208 
1209 		case WLAN_EID_IBSS_PARAMS:
1210 			network->atim_window = info_element->data[0];
1211 			LIBIPW_DEBUG_MGMT("WLAN_EID_IBSS_PARAMS: %d\n",
1212 					     network->atim_window);
1213 			break;
1214 
1215 		case WLAN_EID_CHALLENGE:
1216 			LIBIPW_DEBUG_MGMT("WLAN_EID_CHALLENGE: ignored\n");
1217 			break;
1218 
1219 		case WLAN_EID_VENDOR_SPECIFIC:
1220 			LIBIPW_DEBUG_MGMT("WLAN_EID_VENDOR_SPECIFIC: %d bytes\n",
1221 					     info_element->len);
1222 			if (!libipw_parse_qos_info_param_IE(info_element,
1223 							       network))
1224 				break;
1225 
1226 			if (info_element->len >= 4 &&
1227 			    info_element->data[0] == 0x00 &&
1228 			    info_element->data[1] == 0x50 &&
1229 			    info_element->data[2] == 0xf2 &&
1230 			    info_element->data[3] == 0x01) {
1231 				network->wpa_ie_len = min(info_element->len + 2,
1232 							  MAX_WPA_IE_LEN);
1233 				memcpy(network->wpa_ie, info_element,
1234 				       network->wpa_ie_len);
1235 			}
1236 			break;
1237 
1238 		case WLAN_EID_RSN:
1239 			LIBIPW_DEBUG_MGMT("WLAN_EID_RSN: %d bytes\n",
1240 					     info_element->len);
1241 			network->rsn_ie_len = min(info_element->len + 2,
1242 						  MAX_WPA_IE_LEN);
1243 			memcpy(network->rsn_ie, info_element,
1244 			       network->rsn_ie_len);
1245 			break;
1246 
1247 		case WLAN_EID_QOS_PARAMETER:
1248 			printk(KERN_ERR
1249 			       "QoS Error need to parse QOS_PARAMETER IE\n");
1250 			break;
1251 			/* 802.11h */
1252 		case WLAN_EID_PWR_CONSTRAINT:
1253 			network->power_constraint = info_element->data[0];
1254 			network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1255 			break;
1256 
1257 		case WLAN_EID_CHANNEL_SWITCH:
1258 			network->power_constraint = info_element->data[0];
1259 			network->flags |= NETWORK_HAS_CSA;
1260 			break;
1261 
1262 		case WLAN_EID_QUIET:
1263 			network->quiet.count = info_element->data[0];
1264 			network->quiet.period = info_element->data[1];
1265 			network->quiet.duration = info_element->data[2];
1266 			network->quiet.offset = info_element->data[3];
1267 			network->flags |= NETWORK_HAS_QUIET;
1268 			break;
1269 
1270 		case WLAN_EID_IBSS_DFS:
1271 			network->flags |= NETWORK_HAS_IBSS_DFS;
1272 			break;
1273 
1274 		case WLAN_EID_TPC_REPORT:
1275 			network->tpc_report.transmit_power =
1276 			    info_element->data[0];
1277 			network->tpc_report.link_margin = info_element->data[1];
1278 			network->flags |= NETWORK_HAS_TPC_REPORT;
1279 			break;
1280 
1281 		default:
1282 			LIBIPW_DEBUG_MGMT
1283 			    ("Unsupported info element: %s (%d)\n",
1284 			     get_info_element_string(info_element->id),
1285 			     info_element->id);
1286 			break;
1287 		}
1288 
1289 		length -= sizeof(*info_element) + info_element->len;
1290 		info_element =
1291 		    (struct libipw_info_element *)&info_element->
1292 		    data[info_element->len];
1293 	}
1294 
1295 	return 0;
1296 }
1297 
1298 static int libipw_handle_assoc_resp(struct libipw_device *ieee, struct libipw_assoc_response
1299 				       *frame, struct libipw_rx_stats *stats)
1300 {
1301 	struct libipw_network network_resp = { };
1302 	struct libipw_network *network = &network_resp;
1303 	struct net_device *dev = ieee->dev;
1304 
1305 	network->flags = 0;
1306 	network->qos_data.active = 0;
1307 	network->qos_data.supported = 0;
1308 	network->qos_data.param_count = 0;
1309 	network->qos_data.old_param_count = 0;
1310 
1311 	//network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1312 	network->atim_window = le16_to_cpu(frame->aid);
1313 	network->listen_interval = le16_to_cpu(frame->status);
1314 	memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1315 	network->capability = le16_to_cpu(frame->capability);
1316 	network->last_scanned = jiffies;
1317 	network->rates_len = network->rates_ex_len = 0;
1318 	network->last_associate = 0;
1319 	network->ssid_len = 0;
1320 	network->erp_value =
1321 	    (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1322 
1323 	if (stats->freq == LIBIPW_52GHZ_BAND) {
1324 		/* for A band (No DS info) */
1325 		network->channel = stats->received_channel;
1326 	} else
1327 		network->flags |= NETWORK_HAS_CCK;
1328 
1329 	network->wpa_ie_len = 0;
1330 	network->rsn_ie_len = 0;
1331 
1332 	if (libipw_parse_info_param
1333 	    (frame->info_element, stats->len - sizeof(*frame), network))
1334 		return 1;
1335 
1336 	network->mode = 0;
1337 	if (stats->freq == LIBIPW_52GHZ_BAND)
1338 		network->mode = IEEE_A;
1339 	else {
1340 		if (network->flags & NETWORK_HAS_OFDM)
1341 			network->mode |= IEEE_G;
1342 		if (network->flags & NETWORK_HAS_CCK)
1343 			network->mode |= IEEE_B;
1344 	}
1345 
1346 	memcpy(&network->stats, stats, sizeof(network->stats));
1347 
1348 	if (ieee->handle_assoc_response != NULL)
1349 		ieee->handle_assoc_response(dev, frame, network);
1350 
1351 	return 0;
1352 }
1353 
1354 /***************************************************/
1355 
1356 static int libipw_network_init(struct libipw_device *ieee, struct libipw_probe_response
1357 					 *beacon,
1358 					 struct libipw_network *network,
1359 					 struct libipw_rx_stats *stats)
1360 {
1361 	network->qos_data.active = 0;
1362 	network->qos_data.supported = 0;
1363 	network->qos_data.param_count = 0;
1364 	network->qos_data.old_param_count = 0;
1365 
1366 	/* Pull out fixed field data */
1367 	memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1368 	network->capability = le16_to_cpu(beacon->capability);
1369 	network->last_scanned = jiffies;
1370 	network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1371 	network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1372 	network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1373 	/* Where to pull this? beacon->listen_interval; */
1374 	network->listen_interval = 0x0A;
1375 	network->rates_len = network->rates_ex_len = 0;
1376 	network->last_associate = 0;
1377 	network->ssid_len = 0;
1378 	network->flags = 0;
1379 	network->atim_window = 0;
1380 	network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1381 	    0x3 : 0x0;
1382 
1383 	if (stats->freq == LIBIPW_52GHZ_BAND) {
1384 		/* for A band (No DS info) */
1385 		network->channel = stats->received_channel;
1386 	} else
1387 		network->flags |= NETWORK_HAS_CCK;
1388 
1389 	network->wpa_ie_len = 0;
1390 	network->rsn_ie_len = 0;
1391 
1392 	if (libipw_parse_info_param
1393 	    (beacon->info_element, stats->len - sizeof(*beacon), network))
1394 		return 1;
1395 
1396 	network->mode = 0;
1397 	if (stats->freq == LIBIPW_52GHZ_BAND)
1398 		network->mode = IEEE_A;
1399 	else {
1400 		if (network->flags & NETWORK_HAS_OFDM)
1401 			network->mode |= IEEE_G;
1402 		if (network->flags & NETWORK_HAS_CCK)
1403 			network->mode |= IEEE_B;
1404 	}
1405 
1406 	if (network->mode == 0) {
1407 		LIBIPW_DEBUG_SCAN("Filtered out '%*pE (%pM)' network.\n",
1408 				  network->ssid_len, network->ssid,
1409 				  network->bssid);
1410 		return 1;
1411 	}
1412 
1413 	memcpy(&network->stats, stats, sizeof(network->stats));
1414 
1415 	return 0;
1416 }
1417 
1418 static inline int is_same_network(struct libipw_network *src,
1419 				  struct libipw_network *dst)
1420 {
1421 	/* A network is only a duplicate if the channel, BSSID, and ESSID
1422 	 * all match.  We treat all <hidden> with the same BSSID and channel
1423 	 * as one network */
1424 	return ((src->ssid_len == dst->ssid_len) &&
1425 		(src->channel == dst->channel) &&
1426 		ether_addr_equal_64bits(src->bssid, dst->bssid) &&
1427 		!memcmp(src->ssid, dst->ssid, src->ssid_len));
1428 }
1429 
1430 static void update_network(struct libipw_network *dst,
1431 				  struct libipw_network *src)
1432 {
1433 	int qos_active;
1434 	u8 old_param;
1435 
1436 	/* We only update the statistics if they were created by receiving
1437 	 * the network information on the actual channel the network is on.
1438 	 *
1439 	 * This keeps beacons received on neighbor channels from bringing
1440 	 * down the signal level of an AP. */
1441 	if (dst->channel == src->stats.received_channel)
1442 		memcpy(&dst->stats, &src->stats,
1443 		       sizeof(struct libipw_rx_stats));
1444 	else
1445 		LIBIPW_DEBUG_SCAN("Network %pM info received "
1446 			"off channel (%d vs. %d)\n", src->bssid,
1447 			dst->channel, src->stats.received_channel);
1448 
1449 	dst->capability = src->capability;
1450 	memcpy(dst->rates, src->rates, src->rates_len);
1451 	dst->rates_len = src->rates_len;
1452 	memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1453 	dst->rates_ex_len = src->rates_ex_len;
1454 
1455 	dst->mode = src->mode;
1456 	dst->flags = src->flags;
1457 	dst->time_stamp[0] = src->time_stamp[0];
1458 	dst->time_stamp[1] = src->time_stamp[1];
1459 
1460 	dst->beacon_interval = src->beacon_interval;
1461 	dst->listen_interval = src->listen_interval;
1462 	dst->atim_window = src->atim_window;
1463 	dst->erp_value = src->erp_value;
1464 	dst->tim = src->tim;
1465 
1466 	memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1467 	dst->wpa_ie_len = src->wpa_ie_len;
1468 	memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1469 	dst->rsn_ie_len = src->rsn_ie_len;
1470 
1471 	dst->last_scanned = jiffies;
1472 	qos_active = src->qos_data.active;
1473 	old_param = dst->qos_data.old_param_count;
1474 	if (dst->flags & NETWORK_HAS_QOS_MASK)
1475 		memcpy(&dst->qos_data, &src->qos_data,
1476 		       sizeof(struct libipw_qos_data));
1477 	else {
1478 		dst->qos_data.supported = src->qos_data.supported;
1479 		dst->qos_data.param_count = src->qos_data.param_count;
1480 	}
1481 
1482 	if (dst->qos_data.supported == 1) {
1483 		if (dst->ssid_len)
1484 			LIBIPW_DEBUG_QOS
1485 			    ("QoS the network %s is QoS supported\n",
1486 			     dst->ssid);
1487 		else
1488 			LIBIPW_DEBUG_QOS
1489 			    ("QoS the network is QoS supported\n");
1490 	}
1491 	dst->qos_data.active = qos_active;
1492 	dst->qos_data.old_param_count = old_param;
1493 
1494 	/* dst->last_associate is not overwritten */
1495 }
1496 
1497 static inline int is_beacon(__le16 fc)
1498 {
1499 	return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1500 }
1501 
1502 static void libipw_process_probe_response(struct libipw_device
1503 						    *ieee, struct
1504 						    libipw_probe_response
1505 						    *beacon, struct libipw_rx_stats
1506 						    *stats)
1507 {
1508 	struct net_device *dev = ieee->dev;
1509 	struct libipw_network network = { };
1510 	struct libipw_network *target;
1511 	struct libipw_network *oldest = NULL;
1512 #ifdef CONFIG_LIBIPW_DEBUG
1513 	struct libipw_info_element *info_element = beacon->info_element;
1514 #endif
1515 	unsigned long flags;
1516 
1517 	LIBIPW_DEBUG_SCAN("'%*pE' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1518 		     info_element->len, info_element->data,
1519 		     beacon->header.addr3,
1520 		     (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1521 		     (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1522 		     (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1523 		     (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1524 		     (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1525 		     (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1526 		     (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1527 		     (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1528 		     (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1529 		     (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1530 		     (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1531 		     (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1532 		     (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1533 		     (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1534 		     (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1535 		     (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1536 
1537 	if (libipw_network_init(ieee, beacon, &network, stats)) {
1538 		LIBIPW_DEBUG_SCAN("Dropped '%*pE' (%pM) via %s.\n",
1539 				  info_element->len, info_element->data,
1540 				  beacon->header.addr3,
1541 				  is_beacon(beacon->header.frame_ctl) ?
1542 				  "BEACON" : "PROBE RESPONSE");
1543 		return;
1544 	}
1545 
1546 	/* The network parsed correctly -- so now we scan our known networks
1547 	 * to see if we can find it in our list.
1548 	 *
1549 	 * NOTE:  This search is definitely not optimized.  Once its doing
1550 	 *        the "right thing" we'll optimize it for efficiency if
1551 	 *        necessary */
1552 
1553 	/* Search for this entry in the list and update it if it is
1554 	 * already there. */
1555 
1556 	spin_lock_irqsave(&ieee->lock, flags);
1557 
1558 	list_for_each_entry(target, &ieee->network_list, list) {
1559 		if (is_same_network(target, &network))
1560 			break;
1561 
1562 		if ((oldest == NULL) ||
1563 		    time_before(target->last_scanned, oldest->last_scanned))
1564 			oldest = target;
1565 	}
1566 
1567 	/* If we didn't find a match, then get a new network slot to initialize
1568 	 * with this beacon's information */
1569 	if (&target->list == &ieee->network_list) {
1570 		if (list_empty(&ieee->network_free_list)) {
1571 			/* If there are no more slots, expire the oldest */
1572 			list_del(&oldest->list);
1573 			target = oldest;
1574 			LIBIPW_DEBUG_SCAN("Expired '%*pE' (%pM) from network list.\n",
1575 					  target->ssid_len, target->ssid,
1576 					  target->bssid);
1577 		} else {
1578 			/* Otherwise just pull from the free list */
1579 			target = list_entry(ieee->network_free_list.next,
1580 					    struct libipw_network, list);
1581 			list_del(ieee->network_free_list.next);
1582 		}
1583 
1584 #ifdef CONFIG_LIBIPW_DEBUG
1585 		LIBIPW_DEBUG_SCAN("Adding '%*pE' (%pM) via %s.\n",
1586 				  network.ssid_len, network.ssid,
1587 				  network.bssid,
1588 				  is_beacon(beacon->header.frame_ctl) ?
1589 				  "BEACON" : "PROBE RESPONSE");
1590 #endif
1591 		memcpy(target, &network, sizeof(*target));
1592 		list_add_tail(&target->list, &ieee->network_list);
1593 	} else {
1594 		LIBIPW_DEBUG_SCAN("Updating '%*pE' (%pM) via %s.\n",
1595 				  target->ssid_len, target->ssid,
1596 				  target->bssid,
1597 				  is_beacon(beacon->header.frame_ctl) ?
1598 				  "BEACON" : "PROBE RESPONSE");
1599 		update_network(target, &network);
1600 	}
1601 
1602 	spin_unlock_irqrestore(&ieee->lock, flags);
1603 
1604 	if (is_beacon(beacon->header.frame_ctl)) {
1605 		if (ieee->handle_beacon != NULL)
1606 			ieee->handle_beacon(dev, beacon, target);
1607 	} else {
1608 		if (ieee->handle_probe_response != NULL)
1609 			ieee->handle_probe_response(dev, beacon, target);
1610 	}
1611 }
1612 
1613 void libipw_rx_mgt(struct libipw_device *ieee,
1614 		      struct libipw_hdr_4addr *header,
1615 		      struct libipw_rx_stats *stats)
1616 {
1617 	switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1618 	case IEEE80211_STYPE_ASSOC_RESP:
1619 		LIBIPW_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1620 				     WLAN_FC_GET_STYPE(le16_to_cpu
1621 						       (header->frame_ctl)));
1622 		libipw_handle_assoc_resp(ieee,
1623 					    (struct libipw_assoc_response *)
1624 					    header, stats);
1625 		break;
1626 
1627 	case IEEE80211_STYPE_REASSOC_RESP:
1628 		LIBIPW_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1629 				     WLAN_FC_GET_STYPE(le16_to_cpu
1630 						       (header->frame_ctl)));
1631 		break;
1632 
1633 	case IEEE80211_STYPE_PROBE_REQ:
1634 		LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1635 				     WLAN_FC_GET_STYPE(le16_to_cpu
1636 						       (header->frame_ctl)));
1637 
1638 		if (ieee->handle_probe_request != NULL)
1639 			ieee->handle_probe_request(ieee->dev,
1640 						   (struct
1641 						    libipw_probe_request *)
1642 						   header, stats);
1643 		break;
1644 
1645 	case IEEE80211_STYPE_PROBE_RESP:
1646 		LIBIPW_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1647 				     WLAN_FC_GET_STYPE(le16_to_cpu
1648 						       (header->frame_ctl)));
1649 		LIBIPW_DEBUG_SCAN("Probe response\n");
1650 		libipw_process_probe_response(ieee,
1651 						 (struct
1652 						  libipw_probe_response *)
1653 						 header, stats);
1654 		break;
1655 
1656 	case IEEE80211_STYPE_BEACON:
1657 		LIBIPW_DEBUG_MGMT("received BEACON (%d)\n",
1658 				     WLAN_FC_GET_STYPE(le16_to_cpu
1659 						       (header->frame_ctl)));
1660 		LIBIPW_DEBUG_SCAN("Beacon\n");
1661 		libipw_process_probe_response(ieee,
1662 						 (struct
1663 						  libipw_probe_response *)
1664 						 header, stats);
1665 		break;
1666 	case IEEE80211_STYPE_AUTH:
1667 
1668 		LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1669 				     WLAN_FC_GET_STYPE(le16_to_cpu
1670 						       (header->frame_ctl)));
1671 
1672 		if (ieee->handle_auth != NULL)
1673 			ieee->handle_auth(ieee->dev,
1674 					  (struct libipw_auth *)header);
1675 		break;
1676 
1677 	case IEEE80211_STYPE_DISASSOC:
1678 		if (ieee->handle_disassoc != NULL)
1679 			ieee->handle_disassoc(ieee->dev,
1680 					      (struct libipw_disassoc *)
1681 					      header);
1682 		break;
1683 
1684 	case IEEE80211_STYPE_ACTION:
1685 		LIBIPW_DEBUG_MGMT("ACTION\n");
1686 		if (ieee->handle_action)
1687 			ieee->handle_action(ieee->dev,
1688 					    (struct libipw_action *)
1689 					    header, stats);
1690 		break;
1691 
1692 	case IEEE80211_STYPE_REASSOC_REQ:
1693 		LIBIPW_DEBUG_MGMT("received reassoc (%d)\n",
1694 				     WLAN_FC_GET_STYPE(le16_to_cpu
1695 						       (header->frame_ctl)));
1696 
1697 		LIBIPW_DEBUG_MGMT("%s: LIBIPW_REASSOC_REQ received\n",
1698 				     ieee->dev->name);
1699 		if (ieee->handle_reassoc_request != NULL)
1700 			ieee->handle_reassoc_request(ieee->dev,
1701 						    (struct libipw_reassoc_request *)
1702 						     header);
1703 		break;
1704 
1705 	case IEEE80211_STYPE_ASSOC_REQ:
1706 		LIBIPW_DEBUG_MGMT("received assoc (%d)\n",
1707 				     WLAN_FC_GET_STYPE(le16_to_cpu
1708 						       (header->frame_ctl)));
1709 
1710 		LIBIPW_DEBUG_MGMT("%s: LIBIPW_ASSOC_REQ received\n",
1711 				     ieee->dev->name);
1712 		if (ieee->handle_assoc_request != NULL)
1713 			ieee->handle_assoc_request(ieee->dev);
1714 		break;
1715 
1716 	case IEEE80211_STYPE_DEAUTH:
1717 		LIBIPW_DEBUG_MGMT("DEAUTH\n");
1718 		if (ieee->handle_deauth != NULL)
1719 			ieee->handle_deauth(ieee->dev,
1720 					    (struct libipw_deauth *)
1721 					    header);
1722 		break;
1723 	default:
1724 		LIBIPW_DEBUG_MGMT("received UNKNOWN (%d)\n",
1725 				     WLAN_FC_GET_STYPE(le16_to_cpu
1726 						       (header->frame_ctl)));
1727 		LIBIPW_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1728 				     ieee->dev->name,
1729 				     WLAN_FC_GET_STYPE(le16_to_cpu
1730 						       (header->frame_ctl)));
1731 		break;
1732 	}
1733 }
1734 
1735 EXPORT_SYMBOL_GPL(libipw_rx_any);
1736 EXPORT_SYMBOL(libipw_rx_mgt);
1737 EXPORT_SYMBOL(libipw_rx);
1738