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  * <j@w1.fi>
7  * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
8  * Copyright (c) 2004-2005, 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/errno.h>
18 #include <linux/if_arp.h>
19 #include <linux/in6.h>
20 #include <linux/gfp.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/tcp.h>
29 #include <linux/types.h>
30 #include <linux/wireless.h>
31 #include <linux/etherdevice.h>
32 #include <linux/uaccess.h>
33 #include <linux/ctype.h>
34 
35 #include <net/lib80211.h>
36 
37 #include "libipw.h"
38 
39 static void libipw_monitor_rx(struct libipw_device *ieee,
40 					struct sk_buff *skb,
41 					struct libipw_rx_stats *rx_stats)
42 {
43 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
44 	u16 fc = le16_to_cpu(hdr->frame_control);
45 
46 	skb->dev = ieee->dev;
47 	skb_reset_mac_header(skb);
48 	skb_pull(skb, libipw_get_hdrlen(fc));
49 	skb->pkt_type = PACKET_OTHERHOST;
50 	skb->protocol = 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 libipw_frag_entry *libipw_frag_cache_find(struct
57 							      libipw_device
58 							      *ieee,
59 							      unsigned int seq,
60 							      unsigned int frag,
61 							      u8 * src,
62 							      u8 * dst)
63 {
64 	struct libipw_frag_entry *entry;
65 	int i;
66 
67 	for (i = 0; i < LIBIPW_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 			LIBIPW_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 		    ether_addr_equal(entry->src_addr, src) &&
81 		    ether_addr_equal(entry->dst_addr, dst))
82 			return entry;
83 	}
84 
85 	return NULL;
86 }
87 
88 /* Called only as a tasklet (software IRQ) */
89 static struct sk_buff *libipw_frag_cache_get(struct libipw_device *ieee,
90 						struct libipw_hdr_4addr *hdr)
91 {
92 	struct sk_buff *skb = NULL;
93 	u16 sc;
94 	unsigned int frag, seq;
95 	struct libipw_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 libipw_hdr_4addr) +
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 >= LIBIPW_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 = libipw_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 libipw_frag_cache_invalidate(struct libipw_device *ieee,
141 					   struct libipw_hdr_4addr *hdr)
142 {
143 	u16 sc;
144 	unsigned int seq;
145 	struct libipw_frag_entry *entry;
146 
147 	sc = le16_to_cpu(hdr->seq_ctl);
148 	seq = WLAN_GET_SEQ_SEQ(sc);
149 
150 	entry = libipw_frag_cache_find(ieee, seq, -1, hdr->addr2,
151 					  hdr->addr1);
152 
153 	if (entry == NULL) {
154 		LIBIPW_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 /* libipw_rx_frame_mgtmt
165  *
166  * Responsible for handling management control frames
167  *
168  * Called by libipw_rx */
169 static int
170 libipw_rx_frame_mgmt(struct libipw_device *ieee, struct sk_buff *skb,
171 			struct libipw_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 supported.\n",
176 		       ieee->dev->name);
177 		return 0;
178 /*
179   hostap_update_sta_ps(ieee, (struct hostap_libipw_hdr_4addr *)
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 libipw_rfc1042_header[] =
223     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
224 
225 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
226 static unsigned char libipw_bridge_tunnel_header[] =
227     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
228 /* No encapsulation header if EtherType < 0x600 (=length) */
229 
230 /* Called by libipw_rx_frame_decrypt */
231 static int libipw_is_eapol_frame(struct libipw_device *ieee,
232 				    struct sk_buff *skb)
233 {
234 	struct net_device *dev = ieee->dev;
235 	u16 fc, ethertype;
236 	struct libipw_hdr_3addr *hdr;
237 	u8 *pos;
238 
239 	if (skb->len < 24)
240 		return 0;
241 
242 	hdr = (struct libipw_hdr_3addr *)skb->data;
243 	fc = le16_to_cpu(hdr->frame_ctl);
244 
245 	/* check that the frame is unicast frame to us */
246 	if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
247 	    IEEE80211_FCTL_TODS &&
248 	    ether_addr_equal(hdr->addr1, dev->dev_addr) &&
249 	    ether_addr_equal(hdr->addr3, dev->dev_addr)) {
250 		/* ToDS frame with own addr BSSID and DA */
251 	} else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
252 		   IEEE80211_FCTL_FROMDS &&
253 		   ether_addr_equal(hdr->addr1, dev->dev_addr)) {
254 		/* FromDS frame with own addr as DA */
255 	} else
256 		return 0;
257 
258 	if (skb->len < 24 + 8)
259 		return 0;
260 
261 	/* check for port access entity Ethernet type */
262 	pos = skb->data + 24;
263 	ethertype = (pos[6] << 8) | pos[7];
264 	if (ethertype == ETH_P_PAE)
265 		return 1;
266 
267 	return 0;
268 }
269 
270 /* Called only as a tasklet (software IRQ), by libipw_rx */
271 static int
272 libipw_rx_frame_decrypt(struct libipw_device *ieee, struct sk_buff *skb,
273 			   struct lib80211_crypt_data *crypt)
274 {
275 	struct libipw_hdr_3addr *hdr;
276 	int res, hdrlen;
277 
278 	if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
279 		return 0;
280 
281 	hdr = (struct libipw_hdr_3addr *)skb->data;
282 	hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
283 
284 	atomic_inc(&crypt->refcnt);
285 	res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
286 	atomic_dec(&crypt->refcnt);
287 	if (res < 0) {
288 		LIBIPW_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
289 				     hdr->addr2, res);
290 		if (res == -2)
291 			LIBIPW_DEBUG_DROP("Decryption failed ICV "
292 					     "mismatch (key %d)\n",
293 					     skb->data[hdrlen + 3] >> 6);
294 		ieee->ieee_stats.rx_discards_undecryptable++;
295 		return -1;
296 	}
297 
298 	return res;
299 }
300 
301 /* Called only as a tasklet (software IRQ), by libipw_rx */
302 static int
303 libipw_rx_frame_decrypt_msdu(struct libipw_device *ieee,
304 				struct sk_buff *skb, int keyidx,
305 				struct lib80211_crypt_data *crypt)
306 {
307 	struct libipw_hdr_3addr *hdr;
308 	int res, hdrlen;
309 
310 	if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
311 		return 0;
312 
313 	hdr = (struct libipw_hdr_3addr *)skb->data;
314 	hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
315 
316 	atomic_inc(&crypt->refcnt);
317 	res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
318 	atomic_dec(&crypt->refcnt);
319 	if (res < 0) {
320 		printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
321 		       " (SA=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
322 		       keyidx);
323 		return -1;
324 	}
325 
326 	return 0;
327 }
328 
329 /* All received frames are sent to this function. @skb contains the frame in
330  * IEEE 802.11 format, i.e., in the format it was sent over air.
331  * This function is called only as a tasklet (software IRQ). */
332 int libipw_rx(struct libipw_device *ieee, struct sk_buff *skb,
333 		 struct libipw_rx_stats *rx_stats)
334 {
335 	struct net_device *dev = ieee->dev;
336 	struct libipw_hdr_4addr *hdr;
337 	size_t hdrlen;
338 	u16 fc, type, stype, sc;
339 	unsigned int frag;
340 	u8 *payload;
341 	u16 ethertype;
342 #ifdef NOT_YET
343 	struct net_device *wds = NULL;
344 	struct sk_buff *skb2 = NULL;
345 	struct net_device *wds = NULL;
346 	int frame_authorized = 0;
347 	int from_assoc_ap = 0;
348 	void *sta = NULL;
349 #endif
350 	u8 dst[ETH_ALEN];
351 	u8 src[ETH_ALEN];
352 	struct lib80211_crypt_data *crypt = NULL;
353 	int keyidx = 0;
354 	int can_be_decrypted = 0;
355 
356 	hdr = (struct libipw_hdr_4addr *)skb->data;
357 	if (skb->len < 10) {
358 		printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
359 		goto rx_dropped;
360 	}
361 
362 	fc = le16_to_cpu(hdr->frame_ctl);
363 	type = WLAN_FC_GET_TYPE(fc);
364 	stype = WLAN_FC_GET_STYPE(fc);
365 	sc = le16_to_cpu(hdr->seq_ctl);
366 	frag = WLAN_GET_SEQ_FRAG(sc);
367 	hdrlen = libipw_get_hdrlen(fc);
368 
369 	if (skb->len < hdrlen) {
370 		printk(KERN_INFO "%s: invalid SKB length %d\n",
371 			dev->name, skb->len);
372 		goto rx_dropped;
373 	}
374 
375 	/* Put this code here so that we avoid duplicating it in all
376 	 * Rx paths. - Jean II */
377 #ifdef CONFIG_WIRELESS_EXT
378 #ifdef IW_WIRELESS_SPY		/* defined in iw_handler.h */
379 	/* If spy monitoring on */
380 	if (ieee->spy_data.spy_number > 0) {
381 		struct iw_quality wstats;
382 
383 		wstats.updated = 0;
384 		if (rx_stats->mask & LIBIPW_STATMASK_RSSI) {
385 			wstats.level = rx_stats->signal;
386 			wstats.updated |= IW_QUAL_LEVEL_UPDATED;
387 		} else
388 			wstats.updated |= IW_QUAL_LEVEL_INVALID;
389 
390 		if (rx_stats->mask & LIBIPW_STATMASK_NOISE) {
391 			wstats.noise = rx_stats->noise;
392 			wstats.updated |= IW_QUAL_NOISE_UPDATED;
393 		} else
394 			wstats.updated |= IW_QUAL_NOISE_INVALID;
395 
396 		if (rx_stats->mask & LIBIPW_STATMASK_SIGNAL) {
397 			wstats.qual = rx_stats->signal;
398 			wstats.updated |= IW_QUAL_QUAL_UPDATED;
399 		} else
400 			wstats.updated |= IW_QUAL_QUAL_INVALID;
401 
402 		/* Update spy records */
403 		wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
404 	}
405 #endif				/* IW_WIRELESS_SPY */
406 #endif				/* CONFIG_WIRELESS_EXT */
407 
408 #ifdef NOT_YET
409 	hostap_update_rx_stats(local->ap, hdr, rx_stats);
410 #endif
411 
412 	if (ieee->iw_mode == IW_MODE_MONITOR) {
413 		dev->stats.rx_packets++;
414 		dev->stats.rx_bytes += skb->len;
415 		libipw_monitor_rx(ieee, skb, rx_stats);
416 		return 1;
417 	}
418 
419 	can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
420 			    is_broadcast_ether_addr(hdr->addr2)) ?
421 	    ieee->host_mc_decrypt : ieee->host_decrypt;
422 
423 	if (can_be_decrypted) {
424 		if (skb->len >= hdrlen + 3) {
425 			/* Top two-bits of byte 3 are the key index */
426 			keyidx = skb->data[hdrlen + 3] >> 6;
427 		}
428 
429 		/* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
430 		 * is only allowed 2-bits of storage, no value of keyidx can
431 		 * be provided via above code that would result in keyidx
432 		 * being out of range */
433 		crypt = ieee->crypt_info.crypt[keyidx];
434 
435 #ifdef NOT_YET
436 		sta = NULL;
437 
438 		/* Use station specific key to override default keys if the
439 		 * receiver address is a unicast address ("individual RA"). If
440 		 * bcrx_sta_key parameter is set, station specific key is used
441 		 * even with broad/multicast targets (this is against IEEE
442 		 * 802.11, but makes it easier to use different keys with
443 		 * stations that do not support WEP key mapping). */
444 
445 		if (is_unicast_ether_addr(hdr->addr1) || local->bcrx_sta_key)
446 			(void)hostap_handle_sta_crypto(local, hdr, &crypt,
447 						       &sta);
448 #endif
449 
450 		/* allow NULL decrypt to indicate an station specific override
451 		 * for default encryption */
452 		if (crypt && (crypt->ops == NULL ||
453 			      crypt->ops->decrypt_mpdu == NULL))
454 			crypt = NULL;
455 
456 		if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
457 			/* This seems to be triggered by some (multicast?)
458 			 * frames from other than current BSS, so just drop the
459 			 * frames silently instead of filling system log with
460 			 * these reports. */
461 			LIBIPW_DEBUG_DROP("Decryption failed (not set)"
462 					     " (SA=%pM)\n", hdr->addr2);
463 			ieee->ieee_stats.rx_discards_undecryptable++;
464 			goto rx_dropped;
465 		}
466 	}
467 #ifdef NOT_YET
468 	if (type != WLAN_FC_TYPE_DATA) {
469 		if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
470 		    fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
471 		    (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
472 			printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
473 			       "from %pM\n", dev->name, hdr->addr2);
474 			/* TODO: could inform hostapd about this so that it
475 			 * could send auth failure report */
476 			goto rx_dropped;
477 		}
478 
479 		if (libipw_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
480 			goto rx_dropped;
481 		else
482 			goto rx_exit;
483 	}
484 #endif
485 	/* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
486 	if (sc == ieee->prev_seq_ctl)
487 		goto rx_dropped;
488 	else
489 		ieee->prev_seq_ctl = sc;
490 
491 	/* Data frame - extract src/dst addresses */
492 	if (skb->len < LIBIPW_3ADDR_LEN)
493 		goto rx_dropped;
494 
495 	switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
496 	case IEEE80211_FCTL_FROMDS:
497 		memcpy(dst, hdr->addr1, ETH_ALEN);
498 		memcpy(src, hdr->addr3, ETH_ALEN);
499 		break;
500 	case IEEE80211_FCTL_TODS:
501 		memcpy(dst, hdr->addr3, ETH_ALEN);
502 		memcpy(src, hdr->addr2, ETH_ALEN);
503 		break;
504 	case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
505 		if (skb->len < LIBIPW_4ADDR_LEN)
506 			goto rx_dropped;
507 		memcpy(dst, hdr->addr3, ETH_ALEN);
508 		memcpy(src, hdr->addr4, ETH_ALEN);
509 		break;
510 	default:
511 		memcpy(dst, hdr->addr1, ETH_ALEN);
512 		memcpy(src, hdr->addr2, ETH_ALEN);
513 		break;
514 	}
515 
516 #ifdef NOT_YET
517 	if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
518 		goto rx_dropped;
519 	if (wds) {
520 		skb->dev = dev = wds;
521 		stats = hostap_get_stats(dev);
522 	}
523 
524 	if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
525 	    (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
526 	    IEEE80211_FCTL_FROMDS && ieee->stadev &&
527 	    ether_addr_equal(hdr->addr2, ieee->assoc_ap_addr)) {
528 		/* Frame from BSSID of the AP for which we are a client */
529 		skb->dev = dev = ieee->stadev;
530 		stats = hostap_get_stats(dev);
531 		from_assoc_ap = 1;
532 	}
533 #endif
534 
535 #ifdef NOT_YET
536 	if ((ieee->iw_mode == IW_MODE_MASTER ||
537 	     ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
538 		switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
539 					     wds != NULL)) {
540 		case AP_RX_CONTINUE_NOT_AUTHORIZED:
541 			frame_authorized = 0;
542 			break;
543 		case AP_RX_CONTINUE:
544 			frame_authorized = 1;
545 			break;
546 		case AP_RX_DROP:
547 			goto rx_dropped;
548 		case AP_RX_EXIT:
549 			goto rx_exit;
550 		}
551 	}
552 #endif
553 
554 	/* Nullfunc frames may have PS-bit set, so they must be passed to
555 	 * hostap_handle_sta_rx() before being dropped here. */
556 
557 	stype &= ~IEEE80211_STYPE_QOS_DATA;
558 
559 	if (stype != IEEE80211_STYPE_DATA &&
560 	    stype != IEEE80211_STYPE_DATA_CFACK &&
561 	    stype != IEEE80211_STYPE_DATA_CFPOLL &&
562 	    stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
563 		if (stype != IEEE80211_STYPE_NULLFUNC)
564 			LIBIPW_DEBUG_DROP("RX: dropped data frame "
565 					     "with no data (type=0x%02x, "
566 					     "subtype=0x%02x, len=%d)\n",
567 					     type, stype, skb->len);
568 		goto rx_dropped;
569 	}
570 
571 	/* skb: hdr + (possibly fragmented, possibly encrypted) payload */
572 
573 	if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
574 	    (keyidx = libipw_rx_frame_decrypt(ieee, skb, crypt)) < 0)
575 		goto rx_dropped;
576 
577 	hdr = (struct libipw_hdr_4addr *)skb->data;
578 
579 	/* skb: hdr + (possibly fragmented) plaintext payload */
580 	// PR: FIXME: hostap has additional conditions in the "if" below:
581 	// ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
582 	if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
583 		int flen;
584 		struct sk_buff *frag_skb = libipw_frag_cache_get(ieee, hdr);
585 		LIBIPW_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
586 
587 		if (!frag_skb) {
588 			LIBIPW_DEBUG(LIBIPW_DL_RX | LIBIPW_DL_FRAG,
589 					"Rx cannot get skb from fragment "
590 					"cache (morefrag=%d seq=%u frag=%u)\n",
591 					(fc & IEEE80211_FCTL_MOREFRAGS) != 0,
592 					WLAN_GET_SEQ_SEQ(sc), frag);
593 			goto rx_dropped;
594 		}
595 
596 		flen = skb->len;
597 		if (frag != 0)
598 			flen -= hdrlen;
599 
600 		if (frag_skb->tail + flen > frag_skb->end) {
601 			printk(KERN_WARNING "%s: host decrypted and "
602 			       "reassembled frame did not fit skb\n",
603 			       dev->name);
604 			libipw_frag_cache_invalidate(ieee, hdr);
605 			goto rx_dropped;
606 		}
607 
608 		if (frag == 0) {
609 			/* copy first fragment (including full headers) into
610 			 * beginning of the fragment cache skb */
611 			skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
612 		} else {
613 			/* append frame payload to the end of the fragment
614 			 * cache skb */
615 			skb_copy_from_linear_data_offset(skb, hdrlen,
616 				      skb_put(frag_skb, flen), flen);
617 		}
618 		dev_kfree_skb_any(skb);
619 		skb = NULL;
620 
621 		if (fc & IEEE80211_FCTL_MOREFRAGS) {
622 			/* more fragments expected - leave the skb in fragment
623 			 * cache for now; it will be delivered to upper layers
624 			 * after all fragments have been received */
625 			goto rx_exit;
626 		}
627 
628 		/* this was the last fragment and the frame will be
629 		 * delivered, so remove skb from fragment cache */
630 		skb = frag_skb;
631 		hdr = (struct libipw_hdr_4addr *)skb->data;
632 		libipw_frag_cache_invalidate(ieee, hdr);
633 	}
634 
635 	/* skb: hdr + (possible reassembled) full MSDU payload; possibly still
636 	 * encrypted/authenticated */
637 	if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
638 	    libipw_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
639 		goto rx_dropped;
640 
641 	hdr = (struct libipw_hdr_4addr *)skb->data;
642 	if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
643 		if (		/*ieee->ieee802_1x && */
644 			   libipw_is_eapol_frame(ieee, skb)) {
645 			/* pass unencrypted EAPOL frames even if encryption is
646 			 * configured */
647 		} else {
648 			LIBIPW_DEBUG_DROP("encryption configured, but RX "
649 					     "frame not encrypted (SA=%pM)\n",
650 					     hdr->addr2);
651 			goto rx_dropped;
652 		}
653 	}
654 
655 	if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
656 	    !libipw_is_eapol_frame(ieee, skb)) {
657 		LIBIPW_DEBUG_DROP("dropped unencrypted RX data "
658 				     "frame from %pM (drop_unencrypted=1)\n",
659 				     hdr->addr2);
660 		goto rx_dropped;
661 	}
662 
663 	/* If the frame was decrypted in hardware, we may need to strip off
664 	 * any security data (IV, ICV, etc) that was left behind */
665 	if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
666 	    ieee->host_strip_iv_icv) {
667 		int trimlen = 0;
668 
669 		/* Top two-bits of byte 3 are the key index */
670 		if (skb->len >= hdrlen + 3)
671 			keyidx = skb->data[hdrlen + 3] >> 6;
672 
673 		/* To strip off any security data which appears before the
674 		 * payload, we simply increase hdrlen (as the header gets
675 		 * chopped off immediately below). For the security data which
676 		 * appears after the payload, we use skb_trim. */
677 
678 		switch (ieee->sec.encode_alg[keyidx]) {
679 		case SEC_ALG_WEP:
680 			/* 4 byte IV */
681 			hdrlen += 4;
682 			/* 4 byte ICV */
683 			trimlen = 4;
684 			break;
685 		case SEC_ALG_TKIP:
686 			/* 4 byte IV, 4 byte ExtIV */
687 			hdrlen += 8;
688 			/* 8 byte MIC, 4 byte ICV */
689 			trimlen = 12;
690 			break;
691 		case SEC_ALG_CCMP:
692 			/* 8 byte CCMP header */
693 			hdrlen += 8;
694 			/* 8 byte MIC */
695 			trimlen = 8;
696 			break;
697 		}
698 
699 		if (skb->len < trimlen)
700 			goto rx_dropped;
701 
702 		__skb_trim(skb, skb->len - trimlen);
703 
704 		if (skb->len < hdrlen)
705 			goto rx_dropped;
706 	}
707 
708 	/* skb: hdr + (possible reassembled) full plaintext payload */
709 
710 	payload = skb->data + hdrlen;
711 	ethertype = (payload[6] << 8) | payload[7];
712 
713 #ifdef NOT_YET
714 	/* If IEEE 802.1X is used, check whether the port is authorized to send
715 	 * the received frame. */
716 	if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
717 		if (ethertype == ETH_P_PAE) {
718 			printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
719 			       dev->name);
720 			if (ieee->hostapd && ieee->apdev) {
721 				/* Send IEEE 802.1X frames to the user
722 				 * space daemon for processing */
723 				prism2_rx_80211(ieee->apdev, skb, rx_stats,
724 						PRISM2_RX_MGMT);
725 				ieee->apdevstats.rx_packets++;
726 				ieee->apdevstats.rx_bytes += skb->len;
727 				goto rx_exit;
728 			}
729 		} else if (!frame_authorized) {
730 			printk(KERN_DEBUG "%s: dropped frame from "
731 			       "unauthorized port (IEEE 802.1X): "
732 			       "ethertype=0x%04x\n", dev->name, ethertype);
733 			goto rx_dropped;
734 		}
735 	}
736 #endif
737 
738 	/* convert hdr + possible LLC headers into Ethernet header */
739 	if (skb->len - hdrlen >= 8 &&
740 	    ((memcmp(payload, libipw_rfc1042_header, SNAP_SIZE) == 0 &&
741 	      ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
742 	     memcmp(payload, libipw_bridge_tunnel_header, SNAP_SIZE) == 0)) {
743 		/* remove RFC1042 or Bridge-Tunnel encapsulation and
744 		 * replace EtherType */
745 		skb_pull(skb, hdrlen + SNAP_SIZE);
746 		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
747 		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
748 	} else {
749 		__be16 len;
750 		/* Leave Ethernet header part of hdr and full payload */
751 		skb_pull(skb, hdrlen);
752 		len = htons(skb->len);
753 		memcpy(skb_push(skb, 2), &len, 2);
754 		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
755 		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
756 	}
757 
758 #ifdef NOT_YET
759 	if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
760 		    IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
761 		/* Non-standard frame: get addr4 from its bogus location after
762 		 * the payload */
763 		skb_copy_to_linear_data_offset(skb, ETH_ALEN,
764 					       skb->data + skb->len - ETH_ALEN,
765 					       ETH_ALEN);
766 		skb_trim(skb, skb->len - ETH_ALEN);
767 	}
768 #endif
769 
770 	dev->stats.rx_packets++;
771 	dev->stats.rx_bytes += skb->len;
772 
773 #ifdef NOT_YET
774 	if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
775 		if (is_multicast_ether_addr(dst)) {
776 			/* copy multicast frame both to the higher layers and
777 			 * to the wireless media */
778 			ieee->ap->bridged_multicast++;
779 			skb2 = skb_clone(skb, GFP_ATOMIC);
780 			if (skb2 == NULL)
781 				printk(KERN_DEBUG "%s: skb_clone failed for "
782 				       "multicast frame\n", dev->name);
783 		} else if (hostap_is_sta_assoc(ieee->ap, dst)) {
784 			/* send frame directly to the associated STA using
785 			 * wireless media and not passing to higher layers */
786 			ieee->ap->bridged_unicast++;
787 			skb2 = skb;
788 			skb = NULL;
789 		}
790 	}
791 
792 	if (skb2 != NULL) {
793 		/* send to wireless media */
794 		skb2->dev = dev;
795 		skb2->protocol = htons(ETH_P_802_3);
796 		skb_reset_mac_header(skb2);
797 		skb_reset_network_header(skb2);
798 		/* skb2->network_header += ETH_HLEN; */
799 		dev_queue_xmit(skb2);
800 	}
801 #endif
802 
803 	if (skb) {
804 		skb->protocol = eth_type_trans(skb, dev);
805 		memset(skb->cb, 0, sizeof(skb->cb));
806 		skb->ip_summed = CHECKSUM_NONE;	/* 802.11 crc not sufficient */
807 		if (netif_rx(skb) == NET_RX_DROP) {
808 			/* netif_rx always succeeds, but it might drop
809 			 * the packet.  If it drops the packet, we log that
810 			 * in our stats. */
811 			LIBIPW_DEBUG_DROP
812 			    ("RX: netif_rx dropped the packet\n");
813 			dev->stats.rx_dropped++;
814 		}
815 	}
816 
817       rx_exit:
818 #ifdef NOT_YET
819 	if (sta)
820 		hostap_handle_sta_release(sta);
821 #endif
822 	return 1;
823 
824       rx_dropped:
825 	dev->stats.rx_dropped++;
826 
827 	/* Returning 0 indicates to caller that we have not handled the SKB--
828 	 * so it is still allocated and can be used again by underlying
829 	 * hardware as a DMA target */
830 	return 0;
831 }
832 
833 /* Filter out unrelated packets, call libipw_rx[_mgt]
834  * This function takes over the skb, it should not be used again after calling
835  * this function. */
836 void libipw_rx_any(struct libipw_device *ieee,
837 		     struct sk_buff *skb, struct libipw_rx_stats *stats)
838 {
839 	struct libipw_hdr_4addr *hdr;
840 	int is_packet_for_us;
841 	u16 fc;
842 
843 	if (ieee->iw_mode == IW_MODE_MONITOR) {
844 		if (!libipw_rx(ieee, skb, stats))
845 			dev_kfree_skb_irq(skb);
846 		return;
847 	}
848 
849 	if (skb->len < sizeof(struct ieee80211_hdr))
850 		goto drop_free;
851 
852 	hdr = (struct libipw_hdr_4addr *)skb->data;
853 	fc = le16_to_cpu(hdr->frame_ctl);
854 
855 	if ((fc & IEEE80211_FCTL_VERS) != 0)
856 		goto drop_free;
857 
858 	switch (fc & IEEE80211_FCTL_FTYPE) {
859 	case IEEE80211_FTYPE_MGMT:
860 		if (skb->len < sizeof(struct libipw_hdr_3addr))
861 			goto drop_free;
862 		libipw_rx_mgt(ieee, hdr, stats);
863 		dev_kfree_skb_irq(skb);
864 		return;
865 	case IEEE80211_FTYPE_DATA:
866 		break;
867 	case IEEE80211_FTYPE_CTL:
868 		return;
869 	default:
870 		return;
871 	}
872 
873 	is_packet_for_us = 0;
874 	switch (ieee->iw_mode) {
875 	case IW_MODE_ADHOC:
876 		/* our BSS and not from/to DS */
877 		if (ether_addr_equal(hdr->addr3, ieee->bssid))
878 		if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
879 			/* promisc: get all */
880 			if (ieee->dev->flags & IFF_PROMISC)
881 				is_packet_for_us = 1;
882 			/* to us */
883 			else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
884 				is_packet_for_us = 1;
885 			/* mcast */
886 			else if (is_multicast_ether_addr(hdr->addr1))
887 				is_packet_for_us = 1;
888 		}
889 		break;
890 	case IW_MODE_INFRA:
891 		/* our BSS (== from our AP) and from DS */
892 		if (ether_addr_equal(hdr->addr2, ieee->bssid))
893 		if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
894 			/* promisc: get all */
895 			if (ieee->dev->flags & IFF_PROMISC)
896 				is_packet_for_us = 1;
897 			/* to us */
898 			else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
899 				is_packet_for_us = 1;
900 			/* mcast */
901 			else if (is_multicast_ether_addr(hdr->addr1)) {
902 				/* not our own packet bcasted from AP */
903 				if (!ether_addr_equal(hdr->addr3, ieee->dev->dev_addr))
904 					is_packet_for_us = 1;
905 			}
906 		}
907 		break;
908 	default:
909 		/* ? */
910 		break;
911 	}
912 
913 	if (is_packet_for_us)
914 		if (!libipw_rx(ieee, skb, stats))
915 			dev_kfree_skb_irq(skb);
916 	return;
917 
918 drop_free:
919 	dev_kfree_skb_irq(skb);
920 	ieee->dev->stats.rx_dropped++;
921 }
922 
923 #define MGMT_FRAME_FIXED_PART_LENGTH		0x24
924 
925 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
926 
927 /*
928 * Make the structure we read from the beacon packet to have
929 * the right values
930 */
931 static int libipw_verify_qos_info(struct libipw_qos_information_element
932 				     *info_element, int sub_type)
933 {
934 
935 	if (info_element->qui_subtype != sub_type)
936 		return -1;
937 	if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
938 		return -1;
939 	if (info_element->qui_type != QOS_OUI_TYPE)
940 		return -1;
941 	if (info_element->version != QOS_VERSION_1)
942 		return -1;
943 
944 	return 0;
945 }
946 
947 /*
948  * Parse a QoS parameter element
949  */
950 static int libipw_read_qos_param_element(struct libipw_qos_parameter_info
951 					    *element_param, struct libipw_info_element
952 					    *info_element)
953 {
954 	int ret = 0;
955 	u16 size = sizeof(struct libipw_qos_parameter_info) - 2;
956 
957 	if ((info_element == NULL) || (element_param == NULL))
958 		return -1;
959 
960 	if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
961 		memcpy(element_param->info_element.qui, info_element->data,
962 		       info_element->len);
963 		element_param->info_element.elementID = info_element->id;
964 		element_param->info_element.length = info_element->len;
965 	} else
966 		ret = -1;
967 	if (ret == 0)
968 		ret = libipw_verify_qos_info(&element_param->info_element,
969 						QOS_OUI_PARAM_SUB_TYPE);
970 	return ret;
971 }
972 
973 /*
974  * Parse a QoS information element
975  */
976 static int libipw_read_qos_info_element(struct
977 					   libipw_qos_information_element
978 					   *element_info, struct libipw_info_element
979 					   *info_element)
980 {
981 	int ret = 0;
982 	u16 size = sizeof(struct libipw_qos_information_element) - 2;
983 
984 	if (element_info == NULL)
985 		return -1;
986 	if (info_element == NULL)
987 		return -1;
988 
989 	if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
990 		memcpy(element_info->qui, info_element->data,
991 		       info_element->len);
992 		element_info->elementID = info_element->id;
993 		element_info->length = info_element->len;
994 	} else
995 		ret = -1;
996 
997 	if (ret == 0)
998 		ret = libipw_verify_qos_info(element_info,
999 						QOS_OUI_INFO_SUB_TYPE);
1000 	return ret;
1001 }
1002 
1003 /*
1004  * Write QoS parameters from the ac parameters.
1005  */
1006 static int libipw_qos_convert_ac_to_parameters(struct
1007 						  libipw_qos_parameter_info
1008 						  *param_elm, struct
1009 						  libipw_qos_parameters
1010 						  *qos_param)
1011 {
1012 	int rc = 0;
1013 	int i;
1014 	struct libipw_qos_ac_parameter *ac_params;
1015 	u32 txop;
1016 	u8 cw_min;
1017 	u8 cw_max;
1018 
1019 	for (i = 0; i < QOS_QUEUE_NUM; i++) {
1020 		ac_params = &(param_elm->ac_params_record[i]);
1021 
1022 		qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1023 		qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1024 
1025 		cw_min = ac_params->ecw_min_max & 0x0F;
1026 		qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1027 
1028 		cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1029 		qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1030 
1031 		qos_param->flag[i] =
1032 		    (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1033 
1034 		txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1035 		qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1036 	}
1037 	return rc;
1038 }
1039 
1040 /*
1041  * we have a generic data element which it may contain QoS information or
1042  * parameters element. check the information element length to decide
1043  * which type to read
1044  */
1045 static int libipw_parse_qos_info_param_IE(struct libipw_info_element
1046 					     *info_element,
1047 					     struct libipw_network *network)
1048 {
1049 	int rc = 0;
1050 	struct libipw_qos_parameters *qos_param = NULL;
1051 	struct libipw_qos_information_element qos_info_element;
1052 
1053 	rc = libipw_read_qos_info_element(&qos_info_element, info_element);
1054 
1055 	if (rc == 0) {
1056 		network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1057 		network->flags |= NETWORK_HAS_QOS_INFORMATION;
1058 	} else {
1059 		struct libipw_qos_parameter_info param_element;
1060 
1061 		rc = libipw_read_qos_param_element(&param_element,
1062 						      info_element);
1063 		if (rc == 0) {
1064 			qos_param = &(network->qos_data.parameters);
1065 			libipw_qos_convert_ac_to_parameters(&param_element,
1066 							       qos_param);
1067 			network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1068 			network->qos_data.param_count =
1069 			    param_element.info_element.ac_info & 0x0F;
1070 		}
1071 	}
1072 
1073 	if (rc == 0) {
1074 		LIBIPW_DEBUG_QOS("QoS is supported\n");
1075 		network->qos_data.supported = 1;
1076 	}
1077 	return rc;
1078 }
1079 
1080 #ifdef CONFIG_LIBIPW_DEBUG
1081 #define MFIE_STRING(x) case WLAN_EID_ ##x: return #x
1082 
1083 static const char *get_info_element_string(u16 id)
1084 {
1085 	switch (id) {
1086 		MFIE_STRING(SSID);
1087 		MFIE_STRING(SUPP_RATES);
1088 		MFIE_STRING(FH_PARAMS);
1089 		MFIE_STRING(DS_PARAMS);
1090 		MFIE_STRING(CF_PARAMS);
1091 		MFIE_STRING(TIM);
1092 		MFIE_STRING(IBSS_PARAMS);
1093 		MFIE_STRING(COUNTRY);
1094 		MFIE_STRING(REQUEST);
1095 		MFIE_STRING(CHALLENGE);
1096 		MFIE_STRING(PWR_CONSTRAINT);
1097 		MFIE_STRING(PWR_CAPABILITY);
1098 		MFIE_STRING(TPC_REQUEST);
1099 		MFIE_STRING(TPC_REPORT);
1100 		MFIE_STRING(SUPPORTED_CHANNELS);
1101 		MFIE_STRING(CHANNEL_SWITCH);
1102 		MFIE_STRING(MEASURE_REQUEST);
1103 		MFIE_STRING(MEASURE_REPORT);
1104 		MFIE_STRING(QUIET);
1105 		MFIE_STRING(IBSS_DFS);
1106 		MFIE_STRING(ERP_INFO);
1107 		MFIE_STRING(RSN);
1108 		MFIE_STRING(EXT_SUPP_RATES);
1109 		MFIE_STRING(VENDOR_SPECIFIC);
1110 		MFIE_STRING(QOS_PARAMETER);
1111 	default:
1112 		return "UNKNOWN";
1113 	}
1114 }
1115 #endif
1116 
1117 static int libipw_parse_info_param(struct libipw_info_element
1118 				      *info_element, u16 length,
1119 				      struct libipw_network *network)
1120 {
1121 	u8 i;
1122 #ifdef CONFIG_LIBIPW_DEBUG
1123 	char rates_str[64];
1124 	char *p;
1125 #endif
1126 
1127 	while (length >= sizeof(*info_element)) {
1128 		if (sizeof(*info_element) + info_element->len > length) {
1129 			LIBIPW_DEBUG_MGMT("Info elem: parse failed: "
1130 					     "info_element->len + 2 > left : "
1131 					     "info_element->len+2=%zd left=%d, id=%d.\n",
1132 					     info_element->len +
1133 					     sizeof(*info_element),
1134 					     length, info_element->id);
1135 			/* We stop processing but don't return an error here
1136 			 * because some misbehaviour APs break this rule. ie.
1137 			 * Orinoco AP1000. */
1138 			break;
1139 		}
1140 
1141 		switch (info_element->id) {
1142 		case WLAN_EID_SSID:
1143 			network->ssid_len = min(info_element->len,
1144 						(u8) IW_ESSID_MAX_SIZE);
1145 			memcpy(network->ssid, info_element->data,
1146 			       network->ssid_len);
1147 			if (network->ssid_len < IW_ESSID_MAX_SIZE)
1148 				memset(network->ssid + network->ssid_len, 0,
1149 				       IW_ESSID_MAX_SIZE - network->ssid_len);
1150 
1151 			LIBIPW_DEBUG_MGMT("WLAN_EID_SSID: '%*pE' len=%d.\n",
1152 					  network->ssid_len, network->ssid,
1153 					  network->ssid_len);
1154 			break;
1155 
1156 		case WLAN_EID_SUPP_RATES:
1157 #ifdef CONFIG_LIBIPW_DEBUG
1158 			p = rates_str;
1159 #endif
1160 			network->rates_len = min(info_element->len,
1161 						 MAX_RATES_LENGTH);
1162 			for (i = 0; i < network->rates_len; i++) {
1163 				network->rates[i] = info_element->data[i];
1164 #ifdef CONFIG_LIBIPW_DEBUG
1165 				p += snprintf(p, sizeof(rates_str) -
1166 					      (p - rates_str), "%02X ",
1167 					      network->rates[i]);
1168 #endif
1169 				if (libipw_is_ofdm_rate
1170 				    (info_element->data[i])) {
1171 					network->flags |= NETWORK_HAS_OFDM;
1172 					if (info_element->data[i] &
1173 					    LIBIPW_BASIC_RATE_MASK)
1174 						network->flags &=
1175 						    ~NETWORK_HAS_CCK;
1176 				}
1177 			}
1178 
1179 			LIBIPW_DEBUG_MGMT("WLAN_EID_SUPP_RATES: '%s' (%d)\n",
1180 					     rates_str, network->rates_len);
1181 			break;
1182 
1183 		case WLAN_EID_EXT_SUPP_RATES:
1184 #ifdef CONFIG_LIBIPW_DEBUG
1185 			p = rates_str;
1186 #endif
1187 			network->rates_ex_len = min(info_element->len,
1188 						    MAX_RATES_EX_LENGTH);
1189 			for (i = 0; i < network->rates_ex_len; i++) {
1190 				network->rates_ex[i] = info_element->data[i];
1191 #ifdef CONFIG_LIBIPW_DEBUG
1192 				p += snprintf(p, sizeof(rates_str) -
1193 					      (p - rates_str), "%02X ",
1194 					      network->rates_ex[i]);
1195 #endif
1196 				if (libipw_is_ofdm_rate
1197 				    (info_element->data[i])) {
1198 					network->flags |= NETWORK_HAS_OFDM;
1199 					if (info_element->data[i] &
1200 					    LIBIPW_BASIC_RATE_MASK)
1201 						network->flags &=
1202 						    ~NETWORK_HAS_CCK;
1203 				}
1204 			}
1205 
1206 			LIBIPW_DEBUG_MGMT("WLAN_EID_EXT_SUPP_RATES: '%s' (%d)\n",
1207 					     rates_str, network->rates_ex_len);
1208 			break;
1209 
1210 		case WLAN_EID_DS_PARAMS:
1211 			LIBIPW_DEBUG_MGMT("WLAN_EID_DS_PARAMS: %d\n",
1212 					     info_element->data[0]);
1213 			network->channel = info_element->data[0];
1214 			break;
1215 
1216 		case WLAN_EID_FH_PARAMS:
1217 			LIBIPW_DEBUG_MGMT("WLAN_EID_FH_PARAMS: ignored\n");
1218 			break;
1219 
1220 		case WLAN_EID_CF_PARAMS:
1221 			LIBIPW_DEBUG_MGMT("WLAN_EID_CF_PARAMS: ignored\n");
1222 			break;
1223 
1224 		case WLAN_EID_TIM:
1225 			network->tim.tim_count = info_element->data[0];
1226 			network->tim.tim_period = info_element->data[1];
1227 			LIBIPW_DEBUG_MGMT("WLAN_EID_TIM: partially ignored\n");
1228 			break;
1229 
1230 		case WLAN_EID_ERP_INFO:
1231 			network->erp_value = info_element->data[0];
1232 			network->flags |= NETWORK_HAS_ERP_VALUE;
1233 			LIBIPW_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1234 					     network->erp_value);
1235 			break;
1236 
1237 		case WLAN_EID_IBSS_PARAMS:
1238 			network->atim_window = info_element->data[0];
1239 			LIBIPW_DEBUG_MGMT("WLAN_EID_IBSS_PARAMS: %d\n",
1240 					     network->atim_window);
1241 			break;
1242 
1243 		case WLAN_EID_CHALLENGE:
1244 			LIBIPW_DEBUG_MGMT("WLAN_EID_CHALLENGE: ignored\n");
1245 			break;
1246 
1247 		case WLAN_EID_VENDOR_SPECIFIC:
1248 			LIBIPW_DEBUG_MGMT("WLAN_EID_VENDOR_SPECIFIC: %d bytes\n",
1249 					     info_element->len);
1250 			if (!libipw_parse_qos_info_param_IE(info_element,
1251 							       network))
1252 				break;
1253 
1254 			if (info_element->len >= 4 &&
1255 			    info_element->data[0] == 0x00 &&
1256 			    info_element->data[1] == 0x50 &&
1257 			    info_element->data[2] == 0xf2 &&
1258 			    info_element->data[3] == 0x01) {
1259 				network->wpa_ie_len = min(info_element->len + 2,
1260 							  MAX_WPA_IE_LEN);
1261 				memcpy(network->wpa_ie, info_element,
1262 				       network->wpa_ie_len);
1263 			}
1264 			break;
1265 
1266 		case WLAN_EID_RSN:
1267 			LIBIPW_DEBUG_MGMT("WLAN_EID_RSN: %d bytes\n",
1268 					     info_element->len);
1269 			network->rsn_ie_len = min(info_element->len + 2,
1270 						  MAX_WPA_IE_LEN);
1271 			memcpy(network->rsn_ie, info_element,
1272 			       network->rsn_ie_len);
1273 			break;
1274 
1275 		case WLAN_EID_QOS_PARAMETER:
1276 			printk(KERN_ERR
1277 			       "QoS Error need to parse QOS_PARAMETER IE\n");
1278 			break;
1279 			/* 802.11h */
1280 		case WLAN_EID_PWR_CONSTRAINT:
1281 			network->power_constraint = info_element->data[0];
1282 			network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1283 			break;
1284 
1285 		case WLAN_EID_CHANNEL_SWITCH:
1286 			network->power_constraint = info_element->data[0];
1287 			network->flags |= NETWORK_HAS_CSA;
1288 			break;
1289 
1290 		case WLAN_EID_QUIET:
1291 			network->quiet.count = info_element->data[0];
1292 			network->quiet.period = info_element->data[1];
1293 			network->quiet.duration = info_element->data[2];
1294 			network->quiet.offset = info_element->data[3];
1295 			network->flags |= NETWORK_HAS_QUIET;
1296 			break;
1297 
1298 		case WLAN_EID_IBSS_DFS:
1299 			network->flags |= NETWORK_HAS_IBSS_DFS;
1300 			break;
1301 
1302 		case WLAN_EID_TPC_REPORT:
1303 			network->tpc_report.transmit_power =
1304 			    info_element->data[0];
1305 			network->tpc_report.link_margin = info_element->data[1];
1306 			network->flags |= NETWORK_HAS_TPC_REPORT;
1307 			break;
1308 
1309 		default:
1310 			LIBIPW_DEBUG_MGMT
1311 			    ("Unsupported info element: %s (%d)\n",
1312 			     get_info_element_string(info_element->id),
1313 			     info_element->id);
1314 			break;
1315 		}
1316 
1317 		length -= sizeof(*info_element) + info_element->len;
1318 		info_element =
1319 		    (struct libipw_info_element *)&info_element->
1320 		    data[info_element->len];
1321 	}
1322 
1323 	return 0;
1324 }
1325 
1326 static int libipw_handle_assoc_resp(struct libipw_device *ieee, struct libipw_assoc_response
1327 				       *frame, struct libipw_rx_stats *stats)
1328 {
1329 	struct libipw_network network_resp = { };
1330 	struct libipw_network *network = &network_resp;
1331 	struct net_device *dev = ieee->dev;
1332 
1333 	network->flags = 0;
1334 	network->qos_data.active = 0;
1335 	network->qos_data.supported = 0;
1336 	network->qos_data.param_count = 0;
1337 	network->qos_data.old_param_count = 0;
1338 
1339 	//network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1340 	network->atim_window = le16_to_cpu(frame->aid);
1341 	network->listen_interval = le16_to_cpu(frame->status);
1342 	memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1343 	network->capability = le16_to_cpu(frame->capability);
1344 	network->last_scanned = jiffies;
1345 	network->rates_len = network->rates_ex_len = 0;
1346 	network->last_associate = 0;
1347 	network->ssid_len = 0;
1348 	network->erp_value =
1349 	    (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1350 
1351 	if (stats->freq == LIBIPW_52GHZ_BAND) {
1352 		/* for A band (No DS info) */
1353 		network->channel = stats->received_channel;
1354 	} else
1355 		network->flags |= NETWORK_HAS_CCK;
1356 
1357 	network->wpa_ie_len = 0;
1358 	network->rsn_ie_len = 0;
1359 
1360 	if (libipw_parse_info_param
1361 	    (frame->info_element, stats->len - sizeof(*frame), network))
1362 		return 1;
1363 
1364 	network->mode = 0;
1365 	if (stats->freq == LIBIPW_52GHZ_BAND)
1366 		network->mode = IEEE_A;
1367 	else {
1368 		if (network->flags & NETWORK_HAS_OFDM)
1369 			network->mode |= IEEE_G;
1370 		if (network->flags & NETWORK_HAS_CCK)
1371 			network->mode |= IEEE_B;
1372 	}
1373 
1374 	memcpy(&network->stats, stats, sizeof(network->stats));
1375 
1376 	if (ieee->handle_assoc_response != NULL)
1377 		ieee->handle_assoc_response(dev, frame, network);
1378 
1379 	return 0;
1380 }
1381 
1382 /***************************************************/
1383 
1384 static int libipw_network_init(struct libipw_device *ieee, struct libipw_probe_response
1385 					 *beacon,
1386 					 struct libipw_network *network,
1387 					 struct libipw_rx_stats *stats)
1388 {
1389 	network->qos_data.active = 0;
1390 	network->qos_data.supported = 0;
1391 	network->qos_data.param_count = 0;
1392 	network->qos_data.old_param_count = 0;
1393 
1394 	/* Pull out fixed field data */
1395 	memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1396 	network->capability = le16_to_cpu(beacon->capability);
1397 	network->last_scanned = jiffies;
1398 	network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1399 	network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1400 	network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1401 	/* Where to pull this? beacon->listen_interval; */
1402 	network->listen_interval = 0x0A;
1403 	network->rates_len = network->rates_ex_len = 0;
1404 	network->last_associate = 0;
1405 	network->ssid_len = 0;
1406 	network->flags = 0;
1407 	network->atim_window = 0;
1408 	network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1409 	    0x3 : 0x0;
1410 
1411 	if (stats->freq == LIBIPW_52GHZ_BAND) {
1412 		/* for A band (No DS info) */
1413 		network->channel = stats->received_channel;
1414 	} else
1415 		network->flags |= NETWORK_HAS_CCK;
1416 
1417 	network->wpa_ie_len = 0;
1418 	network->rsn_ie_len = 0;
1419 
1420 	if (libipw_parse_info_param
1421 	    (beacon->info_element, stats->len - sizeof(*beacon), network))
1422 		return 1;
1423 
1424 	network->mode = 0;
1425 	if (stats->freq == LIBIPW_52GHZ_BAND)
1426 		network->mode = IEEE_A;
1427 	else {
1428 		if (network->flags & NETWORK_HAS_OFDM)
1429 			network->mode |= IEEE_G;
1430 		if (network->flags & NETWORK_HAS_CCK)
1431 			network->mode |= IEEE_B;
1432 	}
1433 
1434 	if (network->mode == 0) {
1435 		LIBIPW_DEBUG_SCAN("Filtered out '%*pE (%pM)' network.\n",
1436 				  network->ssid_len, network->ssid,
1437 				  network->bssid);
1438 		return 1;
1439 	}
1440 
1441 	memcpy(&network->stats, stats, sizeof(network->stats));
1442 
1443 	return 0;
1444 }
1445 
1446 static inline int is_same_network(struct libipw_network *src,
1447 				  struct libipw_network *dst)
1448 {
1449 	/* A network is only a duplicate if the channel, BSSID, and ESSID
1450 	 * all match.  We treat all <hidden> with the same BSSID and channel
1451 	 * as one network */
1452 	return ((src->ssid_len == dst->ssid_len) &&
1453 		(src->channel == dst->channel) &&
1454 		ether_addr_equal_64bits(src->bssid, dst->bssid) &&
1455 		!memcmp(src->ssid, dst->ssid, src->ssid_len));
1456 }
1457 
1458 static void update_network(struct libipw_network *dst,
1459 				  struct libipw_network *src)
1460 {
1461 	int qos_active;
1462 	u8 old_param;
1463 
1464 	/* We only update the statistics if they were created by receiving
1465 	 * the network information on the actual channel the network is on.
1466 	 *
1467 	 * This keeps beacons received on neighbor channels from bringing
1468 	 * down the signal level of an AP. */
1469 	if (dst->channel == src->stats.received_channel)
1470 		memcpy(&dst->stats, &src->stats,
1471 		       sizeof(struct libipw_rx_stats));
1472 	else
1473 		LIBIPW_DEBUG_SCAN("Network %pM info received "
1474 			"off channel (%d vs. %d)\n", src->bssid,
1475 			dst->channel, src->stats.received_channel);
1476 
1477 	dst->capability = src->capability;
1478 	memcpy(dst->rates, src->rates, src->rates_len);
1479 	dst->rates_len = src->rates_len;
1480 	memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1481 	dst->rates_ex_len = src->rates_ex_len;
1482 
1483 	dst->mode = src->mode;
1484 	dst->flags = src->flags;
1485 	dst->time_stamp[0] = src->time_stamp[0];
1486 	dst->time_stamp[1] = src->time_stamp[1];
1487 
1488 	dst->beacon_interval = src->beacon_interval;
1489 	dst->listen_interval = src->listen_interval;
1490 	dst->atim_window = src->atim_window;
1491 	dst->erp_value = src->erp_value;
1492 	dst->tim = src->tim;
1493 
1494 	memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1495 	dst->wpa_ie_len = src->wpa_ie_len;
1496 	memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1497 	dst->rsn_ie_len = src->rsn_ie_len;
1498 
1499 	dst->last_scanned = jiffies;
1500 	qos_active = src->qos_data.active;
1501 	old_param = dst->qos_data.old_param_count;
1502 	if (dst->flags & NETWORK_HAS_QOS_MASK)
1503 		memcpy(&dst->qos_data, &src->qos_data,
1504 		       sizeof(struct libipw_qos_data));
1505 	else {
1506 		dst->qos_data.supported = src->qos_data.supported;
1507 		dst->qos_data.param_count = src->qos_data.param_count;
1508 	}
1509 
1510 	if (dst->qos_data.supported == 1) {
1511 		if (dst->ssid_len)
1512 			LIBIPW_DEBUG_QOS
1513 			    ("QoS the network %s is QoS supported\n",
1514 			     dst->ssid);
1515 		else
1516 			LIBIPW_DEBUG_QOS
1517 			    ("QoS the network is QoS supported\n");
1518 	}
1519 	dst->qos_data.active = qos_active;
1520 	dst->qos_data.old_param_count = old_param;
1521 
1522 	/* dst->last_associate is not overwritten */
1523 }
1524 
1525 static inline int is_beacon(__le16 fc)
1526 {
1527 	return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1528 }
1529 
1530 static void libipw_process_probe_response(struct libipw_device
1531 						    *ieee, struct
1532 						    libipw_probe_response
1533 						    *beacon, struct libipw_rx_stats
1534 						    *stats)
1535 {
1536 	struct net_device *dev = ieee->dev;
1537 	struct libipw_network network = { };
1538 	struct libipw_network *target;
1539 	struct libipw_network *oldest = NULL;
1540 #ifdef CONFIG_LIBIPW_DEBUG
1541 	struct libipw_info_element *info_element = beacon->info_element;
1542 #endif
1543 	unsigned long flags;
1544 
1545 	LIBIPW_DEBUG_SCAN("'%*pE' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1546 		     info_element->len, info_element->data,
1547 		     beacon->header.addr3,
1548 		     (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1549 		     (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1550 		     (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1551 		     (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1552 		     (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1553 		     (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1554 		     (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1555 		     (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1556 		     (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1557 		     (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1558 		     (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1559 		     (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1560 		     (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1561 		     (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1562 		     (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1563 		     (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1564 
1565 	if (libipw_network_init(ieee, beacon, &network, stats)) {
1566 		LIBIPW_DEBUG_SCAN("Dropped '%*pE' (%pM) via %s.\n",
1567 				  info_element->len, info_element->data,
1568 				  beacon->header.addr3,
1569 				  is_beacon(beacon->header.frame_ctl) ?
1570 				  "BEACON" : "PROBE RESPONSE");
1571 		return;
1572 	}
1573 
1574 	/* The network parsed correctly -- so now we scan our known networks
1575 	 * to see if we can find it in our list.
1576 	 *
1577 	 * NOTE:  This search is definitely not optimized.  Once its doing
1578 	 *        the "right thing" we'll optimize it for efficiency if
1579 	 *        necessary */
1580 
1581 	/* Search for this entry in the list and update it if it is
1582 	 * already there. */
1583 
1584 	spin_lock_irqsave(&ieee->lock, flags);
1585 
1586 	list_for_each_entry(target, &ieee->network_list, list) {
1587 		if (is_same_network(target, &network))
1588 			break;
1589 
1590 		if ((oldest == NULL) ||
1591 		    time_before(target->last_scanned, oldest->last_scanned))
1592 			oldest = target;
1593 	}
1594 
1595 	/* If we didn't find a match, then get a new network slot to initialize
1596 	 * with this beacon's information */
1597 	if (&target->list == &ieee->network_list) {
1598 		if (list_empty(&ieee->network_free_list)) {
1599 			/* If there are no more slots, expire the oldest */
1600 			list_del(&oldest->list);
1601 			target = oldest;
1602 			LIBIPW_DEBUG_SCAN("Expired '%*pE' (%pM) from network list.\n",
1603 					  target->ssid_len, target->ssid,
1604 					  target->bssid);
1605 		} else {
1606 			/* Otherwise just pull from the free list */
1607 			target = list_entry(ieee->network_free_list.next,
1608 					    struct libipw_network, list);
1609 			list_del(ieee->network_free_list.next);
1610 		}
1611 
1612 #ifdef CONFIG_LIBIPW_DEBUG
1613 		LIBIPW_DEBUG_SCAN("Adding '%*pE' (%pM) via %s.\n",
1614 				  network.ssid_len, network.ssid,
1615 				  network.bssid,
1616 				  is_beacon(beacon->header.frame_ctl) ?
1617 				  "BEACON" : "PROBE RESPONSE");
1618 #endif
1619 		memcpy(target, &network, sizeof(*target));
1620 		list_add_tail(&target->list, &ieee->network_list);
1621 	} else {
1622 		LIBIPW_DEBUG_SCAN("Updating '%*pE' (%pM) via %s.\n",
1623 				  target->ssid_len, target->ssid,
1624 				  target->bssid,
1625 				  is_beacon(beacon->header.frame_ctl) ?
1626 				  "BEACON" : "PROBE RESPONSE");
1627 		update_network(target, &network);
1628 	}
1629 
1630 	spin_unlock_irqrestore(&ieee->lock, flags);
1631 
1632 	if (is_beacon(beacon->header.frame_ctl)) {
1633 		if (ieee->handle_beacon != NULL)
1634 			ieee->handle_beacon(dev, beacon, target);
1635 	} else {
1636 		if (ieee->handle_probe_response != NULL)
1637 			ieee->handle_probe_response(dev, beacon, target);
1638 	}
1639 }
1640 
1641 void libipw_rx_mgt(struct libipw_device *ieee,
1642 		      struct libipw_hdr_4addr *header,
1643 		      struct libipw_rx_stats *stats)
1644 {
1645 	switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1646 	case IEEE80211_STYPE_ASSOC_RESP:
1647 		LIBIPW_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1648 				     WLAN_FC_GET_STYPE(le16_to_cpu
1649 						       (header->frame_ctl)));
1650 		libipw_handle_assoc_resp(ieee,
1651 					    (struct libipw_assoc_response *)
1652 					    header, stats);
1653 		break;
1654 
1655 	case IEEE80211_STYPE_REASSOC_RESP:
1656 		LIBIPW_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1657 				     WLAN_FC_GET_STYPE(le16_to_cpu
1658 						       (header->frame_ctl)));
1659 		break;
1660 
1661 	case IEEE80211_STYPE_PROBE_REQ:
1662 		LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1663 				     WLAN_FC_GET_STYPE(le16_to_cpu
1664 						       (header->frame_ctl)));
1665 
1666 		if (ieee->handle_probe_request != NULL)
1667 			ieee->handle_probe_request(ieee->dev,
1668 						   (struct
1669 						    libipw_probe_request *)
1670 						   header, stats);
1671 		break;
1672 
1673 	case IEEE80211_STYPE_PROBE_RESP:
1674 		LIBIPW_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1675 				     WLAN_FC_GET_STYPE(le16_to_cpu
1676 						       (header->frame_ctl)));
1677 		LIBIPW_DEBUG_SCAN("Probe response\n");
1678 		libipw_process_probe_response(ieee,
1679 						 (struct
1680 						  libipw_probe_response *)
1681 						 header, stats);
1682 		break;
1683 
1684 	case IEEE80211_STYPE_BEACON:
1685 		LIBIPW_DEBUG_MGMT("received BEACON (%d)\n",
1686 				     WLAN_FC_GET_STYPE(le16_to_cpu
1687 						       (header->frame_ctl)));
1688 		LIBIPW_DEBUG_SCAN("Beacon\n");
1689 		libipw_process_probe_response(ieee,
1690 						 (struct
1691 						  libipw_probe_response *)
1692 						 header, stats);
1693 		break;
1694 	case IEEE80211_STYPE_AUTH:
1695 
1696 		LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1697 				     WLAN_FC_GET_STYPE(le16_to_cpu
1698 						       (header->frame_ctl)));
1699 
1700 		if (ieee->handle_auth != NULL)
1701 			ieee->handle_auth(ieee->dev,
1702 					  (struct libipw_auth *)header);
1703 		break;
1704 
1705 	case IEEE80211_STYPE_DISASSOC:
1706 		if (ieee->handle_disassoc != NULL)
1707 			ieee->handle_disassoc(ieee->dev,
1708 					      (struct libipw_disassoc *)
1709 					      header);
1710 		break;
1711 
1712 	case IEEE80211_STYPE_ACTION:
1713 		LIBIPW_DEBUG_MGMT("ACTION\n");
1714 		if (ieee->handle_action)
1715 			ieee->handle_action(ieee->dev,
1716 					    (struct libipw_action *)
1717 					    header, stats);
1718 		break;
1719 
1720 	case IEEE80211_STYPE_REASSOC_REQ:
1721 		LIBIPW_DEBUG_MGMT("received reassoc (%d)\n",
1722 				     WLAN_FC_GET_STYPE(le16_to_cpu
1723 						       (header->frame_ctl)));
1724 
1725 		LIBIPW_DEBUG_MGMT("%s: LIBIPW_REASSOC_REQ received\n",
1726 				     ieee->dev->name);
1727 		if (ieee->handle_reassoc_request != NULL)
1728 			ieee->handle_reassoc_request(ieee->dev,
1729 						    (struct libipw_reassoc_request *)
1730 						     header);
1731 		break;
1732 
1733 	case IEEE80211_STYPE_ASSOC_REQ:
1734 		LIBIPW_DEBUG_MGMT("received assoc (%d)\n",
1735 				     WLAN_FC_GET_STYPE(le16_to_cpu
1736 						       (header->frame_ctl)));
1737 
1738 		LIBIPW_DEBUG_MGMT("%s: LIBIPW_ASSOC_REQ received\n",
1739 				     ieee->dev->name);
1740 		if (ieee->handle_assoc_request != NULL)
1741 			ieee->handle_assoc_request(ieee->dev);
1742 		break;
1743 
1744 	case IEEE80211_STYPE_DEAUTH:
1745 		LIBIPW_DEBUG_MGMT("DEAUTH\n");
1746 		if (ieee->handle_deauth != NULL)
1747 			ieee->handle_deauth(ieee->dev,
1748 					    (struct libipw_deauth *)
1749 					    header);
1750 		break;
1751 	default:
1752 		LIBIPW_DEBUG_MGMT("received UNKNOWN (%d)\n",
1753 				     WLAN_FC_GET_STYPE(le16_to_cpu
1754 						       (header->frame_ctl)));
1755 		LIBIPW_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1756 				     ieee->dev->name,
1757 				     WLAN_FC_GET_STYPE(le16_to_cpu
1758 						       (header->frame_ctl)));
1759 		break;
1760 	}
1761 }
1762 
1763 EXPORT_SYMBOL_GPL(libipw_rx_any);
1764 EXPORT_SYMBOL(libipw_rx_mgt);
1765 EXPORT_SYMBOL(libipw_rx);
1766