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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / net / wireless / ipw2x00 / libipw_rx.c
blob5658db4e3095176647e65f9db4c5063425a1d957
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 <asm/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 !compare_ether_addr(entry->src_addr, src) &&
81 !compare_ether_addr(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 suppported.\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 !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
249 !compare_ether_addr(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 !compare_ether_addr(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 (!(hdr->addr1[0] & 0x01) || 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 case 0:
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 && !compare_ether_addr(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 // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
581 if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
582 int flen;
583 struct sk_buff *frag_skb = libipw_frag_cache_get(ieee, hdr);
584 LIBIPW_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
585
586 if (!frag_skb) {
587 LIBIPW_DEBUG(LIBIPW_DL_RX | LIBIPW_DL_FRAG,
588 "Rx cannot get skb from fragment "
589 "cache (morefrag=%d seq=%u frag=%u)\n",
590 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
591 WLAN_GET_SEQ_SEQ(sc), frag);
592 goto rx_dropped;
593 }
594
595 flen = skb->len;
596 if (frag != 0)
597 flen -= hdrlen;
598
599 if (frag_skb->tail + flen > frag_skb->end) {
600 printk(KERN_WARNING "%s: host decrypted and "
601 "reassembled frame did not fit skb\n",
602 dev->name);
603 libipw_frag_cache_invalidate(ieee, hdr);
604 goto rx_dropped;
605 }
606
607 if (frag == 0) {
608 /* copy first fragment (including full headers) into
609 * beginning of the fragment cache skb */
610 skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
611 } else {
612 /* append frame payload to the end of the fragment
613 * cache skb */
614 skb_copy_from_linear_data_offset(skb, hdrlen,
615 skb_put(frag_skb, flen), flen);
616 }
617 dev_kfree_skb_any(skb);
618 skb = NULL;
619
620 if (fc & IEEE80211_FCTL_MOREFRAGS) {
621 /* more fragments expected - leave the skb in fragment
622 * cache for now; it will be delivered to upper layers
623 * after all fragments have been received */
624 goto rx_exit;
625 }
626
627 /* this was the last fragment and the frame will be
628 * delivered, so remove skb from fragment cache */
629 skb = frag_skb;
630 hdr = (struct libipw_hdr_4addr *)skb->data;
631 libipw_frag_cache_invalidate(ieee, hdr);
632 }
633
634 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
635 * encrypted/authenticated */
636 if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
637 libipw_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
638 goto rx_dropped;
639
640 hdr = (struct libipw_hdr_4addr *)skb->data;
641 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
642 if ( /*ieee->ieee802_1x && */
643 libipw_is_eapol_frame(ieee, skb)) {
644 /* pass unencrypted EAPOL frames even if encryption is
645 * configured */
646 } else {
647 LIBIPW_DEBUG_DROP("encryption configured, but RX "
648 "frame not encrypted (SA=%pM)\n",
649 hdr->addr2);
650 goto rx_dropped;
651 }
652 }
653
654 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
655 !libipw_is_eapol_frame(ieee, skb)) {
656 LIBIPW_DEBUG_DROP("dropped unencrypted RX data "
657 "frame from %pM (drop_unencrypted=1)\n",
658 hdr->addr2);
659 goto rx_dropped;
660 }
661
662 /* If the frame was decrypted in hardware, we may need to strip off
663 * any security data (IV, ICV, etc) that was left behind */
664 if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
665 ieee->host_strip_iv_icv) {
666 int trimlen = 0;
667
668 /* Top two-bits of byte 3 are the key index */
669 if (skb->len >= hdrlen + 3)
670 keyidx = skb->data[hdrlen + 3] >> 6;
671
672 /* To strip off any security data which appears before the
673 * payload, we simply increase hdrlen (as the header gets
674 * chopped off immediately below). For the security data which
675 * appears after the payload, we use skb_trim. */
676
677 switch (ieee->sec.encode_alg[keyidx]) {
678 case SEC_ALG_WEP:
679 /* 4 byte IV */
680 hdrlen += 4;
681 /* 4 byte ICV */
682 trimlen = 4;
683 break;
684 case SEC_ALG_TKIP:
685 /* 4 byte IV, 4 byte ExtIV */
686 hdrlen += 8;
687 /* 8 byte MIC, 4 byte ICV */
688 trimlen = 12;
689 break;
690 case SEC_ALG_CCMP:
691 /* 8 byte CCMP header */
692 hdrlen += 8;
693 /* 8 byte MIC */
694 trimlen = 8;
695 break;
696 }
697
698 if (skb->len < trimlen)
699 goto rx_dropped;
700
701 __skb_trim(skb, skb->len - trimlen);
702
703 if (skb->len < hdrlen)
704 goto rx_dropped;
705 }
706
707 /* skb: hdr + (possible reassembled) full plaintext payload */
708
709 payload = skb->data + hdrlen;
710 ethertype = (payload[6] << 8) | payload[7];
711
712 #ifdef NOT_YET
713 /* If IEEE 802.1X is used, check whether the port is authorized to send
714 * the received frame. */
715 if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
716 if (ethertype == ETH_P_PAE) {
717 printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
718 dev->name);
719 if (ieee->hostapd && ieee->apdev) {
720 /* Send IEEE 802.1X frames to the user
721 * space daemon for processing */
722 prism2_rx_80211(ieee->apdev, skb, rx_stats,
723 PRISM2_RX_MGMT);
724 ieee->apdevstats.rx_packets++;
725 ieee->apdevstats.rx_bytes += skb->len;
726 goto rx_exit;
727 }
728 } else if (!frame_authorized) {
729 printk(KERN_DEBUG "%s: dropped frame from "
730 "unauthorized port (IEEE 802.1X): "
731 "ethertype=0x%04x\n", dev->name, ethertype);
732 goto rx_dropped;
733 }
734 }
735 #endif
736
737 /* convert hdr + possible LLC headers into Ethernet header */
738 if (skb->len - hdrlen >= 8 &&
739 ((memcmp(payload, libipw_rfc1042_header, SNAP_SIZE) == 0 &&
740 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
741 memcmp(payload, libipw_bridge_tunnel_header, SNAP_SIZE) == 0)) {
742 /* remove RFC1042 or Bridge-Tunnel encapsulation and
743 * replace EtherType */
744 skb_pull(skb, hdrlen + SNAP_SIZE);
745 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
746 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
747 } else {
748 __be16 len;
749 /* Leave Ethernet header part of hdr and full payload */
750 skb_pull(skb, hdrlen);
751 len = htons(skb->len);
752 memcpy(skb_push(skb, 2), &len, 2);
753 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
754 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
755 }
756
757 #ifdef NOT_YET
758 if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
759 IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
760 /* Non-standard frame: get addr4 from its bogus location after
761 * the payload */
762 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
763 skb->data + skb->len - ETH_ALEN,
764 ETH_ALEN);
765 skb_trim(skb, skb->len - ETH_ALEN);
766 }
767 #endif
768
769 dev->stats.rx_packets++;
770 dev->stats.rx_bytes += skb->len;
771
772 #ifdef NOT_YET
773 if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
774 if (dst[0] & 0x01) {
775 /* copy multicast frame both to the higher layers and
776 * to the wireless media */
777 ieee->ap->bridged_multicast++;
778 skb2 = skb_clone(skb, GFP_ATOMIC);
779 if (skb2 == NULL)
780 printk(KERN_DEBUG "%s: skb_clone failed for "
781 "multicast frame\n", dev->name);
782 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
783 /* send frame directly to the associated STA using
784 * wireless media and not passing to higher layers */
785 ieee->ap->bridged_unicast++;
786 skb2 = skb;
787 skb = NULL;
788 }
789 }
790
791 if (skb2 != NULL) {
792 /* send to wireless media */
793 skb2->dev = dev;
794 skb2->protocol = htons(ETH_P_802_3);
795 skb_reset_mac_header(skb2);
796 skb_reset_network_header(skb2);
797 /* skb2->network_header += ETH_HLEN; */
798 dev_queue_xmit(skb2);
799 }
800 #endif
801
802 if (skb) {
803 skb->protocol = eth_type_trans(skb, dev);
804 memset(skb->cb, 0, sizeof(skb->cb));
805 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
806 if (netif_rx(skb) == NET_RX_DROP) {
807 /* netif_rx always succeeds, but it might drop
808 * the packet. If it drops the packet, we log that
809 * in our stats. */
810 LIBIPW_DEBUG_DROP
811 ("RX: netif_rx dropped the packet\n");
812 dev->stats.rx_dropped++;
813 }
814 }
815
816 rx_exit:
817 #ifdef NOT_YET
818 if (sta)
819 hostap_handle_sta_release(sta);
820 #endif
821 return 1;
822
823 rx_dropped:
824 dev->stats.rx_dropped++;
825
826 /* Returning 0 indicates to caller that we have not handled the SKB--
827 * so it is still allocated and can be used again by underlying
828 * hardware as a DMA target */
829 return 0;
830 }
831
832 /* Filter out unrelated packets, call libipw_rx[_mgt]
833 * This function takes over the skb, it should not be used again after calling
834 * this function. */
835 void libipw_rx_any(struct libipw_device *ieee,
836 struct sk_buff *skb, struct libipw_rx_stats *stats)
837 {
838 struct libipw_hdr_4addr *hdr;
839 int is_packet_for_us;
840 u16 fc;
841
842 if (ieee->iw_mode == IW_MODE_MONITOR) {
843 if (!libipw_rx(ieee, skb, stats))
844 dev_kfree_skb_irq(skb);
845 return;
846 }
847
848 if (skb->len < sizeof(struct ieee80211_hdr))
849 goto drop_free;
850
851 hdr = (struct libipw_hdr_4addr *)skb->data;
852 fc = le16_to_cpu(hdr->frame_ctl);
853
854 if ((fc & IEEE80211_FCTL_VERS) != 0)
855 goto drop_free;
856
857 switch (fc & IEEE80211_FCTL_FTYPE) {
858 case IEEE80211_FTYPE_MGMT:
859 if (skb->len < sizeof(struct libipw_hdr_3addr))
860 goto drop_free;
861 libipw_rx_mgt(ieee, hdr, stats);
862 dev_kfree_skb_irq(skb);
863 return;
864 case IEEE80211_FTYPE_DATA:
865 break;
866 case IEEE80211_FTYPE_CTL:
867 return;
868 default:
869 return;
870 }
871
872 is_packet_for_us = 0;
873 switch (ieee->iw_mode) {
874 case IW_MODE_ADHOC:
875 /* our BSS and not from/to DS */
876 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
877 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
878 /* promisc: get all */
879 if (ieee->dev->flags & IFF_PROMISC)
880 is_packet_for_us = 1;
881 /* to us */
882 else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
883 is_packet_for_us = 1;
884 /* mcast */
885 else if (is_multicast_ether_addr(hdr->addr1))
886 is_packet_for_us = 1;
887 }
888 break;
889 case IW_MODE_INFRA:
890 /* our BSS (== from our AP) and from DS */
891 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
892 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
893 /* promisc: get all */
894 if (ieee->dev->flags & IFF_PROMISC)
895 is_packet_for_us = 1;
896 /* to us */
897 else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
898 is_packet_for_us = 1;
899 /* mcast */
900 else if (is_multicast_ether_addr(hdr->addr1)) {
901 /* not our own packet bcasted from AP */
902 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
903 is_packet_for_us = 1;
904 }
905 }
906 break;
907 default:
908 /* ? */
909 break;
910 }
911
912 if (is_packet_for_us)
913 if (!libipw_rx(ieee, skb, stats))
914 dev_kfree_skb_irq(skb);
915 return;
916
917 drop_free:
918 dev_kfree_skb_irq(skb);
919 ieee->dev->stats.rx_dropped++;
920 }
921
922 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
923
924 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
925
926 /*
927 * Make ther structure we read from the beacon packet has
928 * the right values
929 */
930 static int libipw_verify_qos_info(struct libipw_qos_information_element
931 *info_element, int sub_type)
932 {
933
934 if (info_element->qui_subtype != sub_type)
935 return -1;
936 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
937 return -1;
938 if (info_element->qui_type != QOS_OUI_TYPE)
939 return -1;
940 if (info_element->version != QOS_VERSION_1)
941 return -1;
942
943 return 0;
944 }
945
946 /*
947 * Parse a QoS parameter element
948 */
949 static int libipw_read_qos_param_element(struct libipw_qos_parameter_info
950 *element_param, struct libipw_info_element
951 *info_element)
952 {
953 int ret = 0;
954 u16 size = sizeof(struct libipw_qos_parameter_info) - 2;
955
956 if ((info_element == NULL) || (element_param == NULL))
957 return -1;
958
959 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
960 memcpy(element_param->info_element.qui, info_element->data,
961 info_element->len);
962 element_param->info_element.elementID = info_element->id;
963 element_param->info_element.length = info_element->len;
964 } else
965 ret = -1;
966 if (ret == 0)
967 ret = libipw_verify_qos_info(&element_param->info_element,
968 QOS_OUI_PARAM_SUB_TYPE);
969 return ret;
970 }
971
972 /*
973 * Parse a QoS information element
974 */
975 static int libipw_read_qos_info_element(struct
976 libipw_qos_information_element
977 *element_info, struct libipw_info_element
978 *info_element)
979 {
980 int ret = 0;
981 u16 size = sizeof(struct libipw_qos_information_element) - 2;
982
983 if (element_info == NULL)
984 return -1;
985 if (info_element == NULL)
986 return -1;
987
988 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
989 memcpy(element_info->qui, info_element->data,
990 info_element->len);
991 element_info->elementID = info_element->id;
992 element_info->length = info_element->len;
993 } else
994 ret = -1;
995
996 if (ret == 0)
997 ret = libipw_verify_qos_info(element_info,
998 QOS_OUI_INFO_SUB_TYPE);
999 return ret;
1000 }
1001
1002 /*
1003 * Write QoS parameters from the ac parameters.
1004 */
1005 static int libipw_qos_convert_ac_to_parameters(struct
1006 libipw_qos_parameter_info
1007 *param_elm, struct
1008 libipw_qos_parameters
1009 *qos_param)
1010 {
1011 int rc = 0;
1012 int i;
1013 struct libipw_qos_ac_parameter *ac_params;
1014 u32 txop;
1015 u8 cw_min;
1016 u8 cw_max;
1017
1018 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1019 ac_params = &(param_elm->ac_params_record[i]);
1020
1021 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1022 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1023
1024 cw_min = ac_params->ecw_min_max & 0x0F;
1025 qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1026
1027 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1028 qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1029
1030 qos_param->flag[i] =
1031 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1032
1033 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1034 qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1035 }
1036 return rc;
1037 }
1038
1039 /*
1040 * we have a generic data element which it may contain QoS information or
1041 * parameters element. check the information element length to decide
1042 * which type to read
1043 */
1044 static int libipw_parse_qos_info_param_IE(struct libipw_info_element
1045 *info_element,
1046 struct libipw_network *network)
1047 {
1048 int rc = 0;
1049 struct libipw_qos_parameters *qos_param = NULL;
1050 struct libipw_qos_information_element qos_info_element;
1051
1052 rc = libipw_read_qos_info_element(&qos_info_element, info_element);
1053
1054 if (rc == 0) {
1055 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1056 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1057 } else {
1058 struct libipw_qos_parameter_info param_element;
1059
1060 rc = libipw_read_qos_param_element(&param_element,
1061 info_element);
1062 if (rc == 0) {
1063 qos_param = &(network->qos_data.parameters);
1064 libipw_qos_convert_ac_to_parameters(&param_element,
1065 qos_param);
1066 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1067 network->qos_data.param_count =
1068 param_element.info_element.ac_info & 0x0F;
1069 }
1070 }
1071
1072 if (rc == 0) {
1073 LIBIPW_DEBUG_QOS("QoS is supported\n");
1074 network->qos_data.supported = 1;
1075 }
1076 return rc;
1077 }
1078
1079 #ifdef CONFIG_LIBIPW_DEBUG
1080 #define MFIE_STRING(x) case WLAN_EID_ ##x: return #x
1081
1082 static const char *get_info_element_string(u16 id)
1083 {
1084 switch (id) {
1085 MFIE_STRING(SSID);
1086 MFIE_STRING(SUPP_RATES);
1087 MFIE_STRING(FH_PARAMS);
1088 MFIE_STRING(DS_PARAMS);
1089 MFIE_STRING(CF_PARAMS);
1090 MFIE_STRING(TIM);
1091 MFIE_STRING(IBSS_PARAMS);
1092 MFIE_STRING(COUNTRY);
1093 MFIE_STRING(HP_PARAMS);
1094 MFIE_STRING(HP_TABLE);
1095 MFIE_STRING(REQUEST);
1096 MFIE_STRING(CHALLENGE);
1097 MFIE_STRING(PWR_CONSTRAINT);
1098 MFIE_STRING(PWR_CAPABILITY);
1099 MFIE_STRING(TPC_REQUEST);
1100 MFIE_STRING(TPC_REPORT);
1101 MFIE_STRING(SUPPORTED_CHANNELS);
1102 MFIE_STRING(CHANNEL_SWITCH);
1103 MFIE_STRING(MEASURE_REQUEST);
1104 MFIE_STRING(MEASURE_REPORT);
1105 MFIE_STRING(QUIET);
1106 MFIE_STRING(IBSS_DFS);
1107 MFIE_STRING(ERP_INFO);
1108 MFIE_STRING(RSN);
1109 MFIE_STRING(EXT_SUPP_RATES);
1110 MFIE_STRING(GENERIC);
1111 MFIE_STRING(QOS_PARAMETER);
1112 default:
1113 return "UNKNOWN";
1114 }
1115 }
1116 #endif
1117
1118 static int libipw_parse_info_param(struct libipw_info_element
1119 *info_element, u16 length,
1120 struct libipw_network *network)
1121 {
1122 DECLARE_SSID_BUF(ssid);
1123 u8 i;
1124 #ifdef CONFIG_LIBIPW_DEBUG
1125 char rates_str[64];
1126 char *p;
1127 #endif
1128
1129 while (length >= sizeof(*info_element)) {
1130 if (sizeof(*info_element) + info_element->len > length) {
1131 LIBIPW_DEBUG_MGMT("Info elem: parse failed: "
1132 "info_element->len + 2 > left : "
1133 "info_element->len+2=%zd left=%d, id=%d.\n",
1134 info_element->len +
1135 sizeof(*info_element),
1136 length, info_element->id);
1137 /* We stop processing but don't return an error here
1138 * because some misbehaviour APs break this rule. ie.
1139 * Orinoco AP1000. */
1140 break;
1141 }
1142
1143 switch (info_element->id) {
1144 case WLAN_EID_SSID:
1145 network->ssid_len = min(info_element->len,
1146 (u8) IW_ESSID_MAX_SIZE);
1147 memcpy(network->ssid, info_element->data,
1148 network->ssid_len);
1149 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1150 memset(network->ssid + network->ssid_len, 0,
1151 IW_ESSID_MAX_SIZE - network->ssid_len);
1152
1153 LIBIPW_DEBUG_MGMT("WLAN_EID_SSID: '%s' len=%d.\n",
1154 print_ssid(ssid, network->ssid,
1155 network->ssid_len),
1156 network->ssid_len);
1157 break;
1158
1159 case WLAN_EID_SUPP_RATES:
1160 #ifdef CONFIG_LIBIPW_DEBUG
1161 p = rates_str;
1162 #endif
1163 network->rates_len = min(info_element->len,
1164 MAX_RATES_LENGTH);
1165 for (i = 0; i < network->rates_len; i++) {
1166 network->rates[i] = info_element->data[i];
1167 #ifdef CONFIG_LIBIPW_DEBUG
1168 p += snprintf(p, sizeof(rates_str) -
1169 (p - rates_str), "%02X ",
1170 network->rates[i]);
1171 #endif
1172 if (libipw_is_ofdm_rate
1173 (info_element->data[i])) {
1174 network->flags |= NETWORK_HAS_OFDM;
1175 if (info_element->data[i] &
1176 LIBIPW_BASIC_RATE_MASK)
1177 network->flags &=
1178 ~NETWORK_HAS_CCK;
1179 }
1180 }
1181
1182 LIBIPW_DEBUG_MGMT("WLAN_EID_SUPP_RATES: '%s' (%d)\n",
1183 rates_str, network->rates_len);
1184 break;
1185
1186 case WLAN_EID_EXT_SUPP_RATES:
1187 #ifdef CONFIG_LIBIPW_DEBUG
1188 p = rates_str;
1189 #endif
1190 network->rates_ex_len = min(info_element->len,
1191 MAX_RATES_EX_LENGTH);
1192 for (i = 0; i < network->rates_ex_len; i++) {
1193 network->rates_ex[i] = info_element->data[i];
1194 #ifdef CONFIG_LIBIPW_DEBUG
1195 p += snprintf(p, sizeof(rates_str) -
1196 (p - rates_str), "%02X ",
1197 network->rates[i]);
1198 #endif
1199 if (libipw_is_ofdm_rate
1200 (info_element->data[i])) {
1201 network->flags |= NETWORK_HAS_OFDM;
1202 if (info_element->data[i] &
1203 LIBIPW_BASIC_RATE_MASK)
1204 network->flags &=
1205 ~NETWORK_HAS_CCK;
1206 }
1207 }
1208
1209 LIBIPW_DEBUG_MGMT("WLAN_EID_EXT_SUPP_RATES: '%s' (%d)\n",
1210 rates_str, network->rates_ex_len);
1211 break;
1212
1213 case WLAN_EID_DS_PARAMS:
1214 LIBIPW_DEBUG_MGMT("WLAN_EID_DS_PARAMS: %d\n",
1215 info_element->data[0]);
1216 network->channel = info_element->data[0];
1217 break;
1218
1219 case WLAN_EID_FH_PARAMS:
1220 LIBIPW_DEBUG_MGMT("WLAN_EID_FH_PARAMS: ignored\n");
1221 break;
1222
1223 case WLAN_EID_CF_PARAMS:
1224 LIBIPW_DEBUG_MGMT("WLAN_EID_CF_PARAMS: ignored\n");
1225 break;
1226
1227 case WLAN_EID_TIM:
1228 network->tim.tim_count = info_element->data[0];
1229 network->tim.tim_period = info_element->data[1];
1230 LIBIPW_DEBUG_MGMT("WLAN_EID_TIM: partially ignored\n");
1231 break;
1232
1233 case WLAN_EID_ERP_INFO:
1234 network->erp_value = info_element->data[0];
1235 network->flags |= NETWORK_HAS_ERP_VALUE;
1236 LIBIPW_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1237 network->erp_value);
1238 break;
1239
1240 case WLAN_EID_IBSS_PARAMS:
1241 network->atim_window = info_element->data[0];
1242 LIBIPW_DEBUG_MGMT("WLAN_EID_IBSS_PARAMS: %d\n",
1243 network->atim_window);
1244 break;
1245
1246 case WLAN_EID_CHALLENGE:
1247 LIBIPW_DEBUG_MGMT("WLAN_EID_CHALLENGE: ignored\n");
1248 break;
1249
1250 case WLAN_EID_GENERIC:
1251 LIBIPW_DEBUG_MGMT("WLAN_EID_GENERIC: %d bytes\n",
1252 info_element->len);
1253 if (!libipw_parse_qos_info_param_IE(info_element,
1254 network))
1255 break;
1256
1257 if (info_element->len >= 4 &&
1258 info_element->data[0] == 0x00 &&
1259 info_element->data[1] == 0x50 &&
1260 info_element->data[2] == 0xf2 &&
1261 info_element->data[3] == 0x01) {
1262 network->wpa_ie_len = min(info_element->len + 2,
1263 MAX_WPA_IE_LEN);
1264 memcpy(network->wpa_ie, info_element,
1265 network->wpa_ie_len);
1266 }
1267 break;
1268
1269 case WLAN_EID_RSN:
1270 LIBIPW_DEBUG_MGMT("WLAN_EID_RSN: %d bytes\n",
1271 info_element->len);
1272 network->rsn_ie_len = min(info_element->len + 2,
1273 MAX_WPA_IE_LEN);
1274 memcpy(network->rsn_ie, info_element,
1275 network->rsn_ie_len);
1276 break;
1277
1278 case WLAN_EID_QOS_PARAMETER:
1279 printk(KERN_ERR
1280 "QoS Error need to parse QOS_PARAMETER IE\n");
1281 break;
1282 /* 802.11h */
1283 case WLAN_EID_PWR_CONSTRAINT:
1284 network->power_constraint = info_element->data[0];
1285 network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1286 break;
1287
1288 case WLAN_EID_CHANNEL_SWITCH:
1289 network->power_constraint = info_element->data[0];
1290 network->flags |= NETWORK_HAS_CSA;
1291 break;
1292
1293 case WLAN_EID_QUIET:
1294 network->quiet.count = info_element->data[0];
1295 network->quiet.period = info_element->data[1];
1296 network->quiet.duration = info_element->data[2];
1297 network->quiet.offset = info_element->data[3];
1298 network->flags |= NETWORK_HAS_QUIET;
1299 break;
1300
1301 case WLAN_EID_IBSS_DFS:
1302 if (network->ibss_dfs)
1303 break;
1304 network->ibss_dfs = kmemdup(info_element->data,
1305 info_element->len,
1306 GFP_ATOMIC);
1307 if (!network->ibss_dfs)
1308 return 1;
1309 network->flags |= NETWORK_HAS_IBSS_DFS;
1310 break;
1311
1312 case WLAN_EID_TPC_REPORT:
1313 network->tpc_report.transmit_power =
1314 info_element->data[0];
1315 network->tpc_report.link_margin = info_element->data[1];
1316 network->flags |= NETWORK_HAS_TPC_REPORT;
1317 break;
1318
1319 default:
1320 LIBIPW_DEBUG_MGMT
1321 ("Unsupported info element: %s (%d)\n",
1322 get_info_element_string(info_element->id),
1323 info_element->id);
1324 break;
1325 }
1326
1327 length -= sizeof(*info_element) + info_element->len;
1328 info_element =
1329 (struct libipw_info_element *)&info_element->
1330 data[info_element->len];
1331 }
1332
1333 return 0;
1334 }
1335
1336 static int libipw_handle_assoc_resp(struct libipw_device *ieee, struct libipw_assoc_response
1337 *frame, struct libipw_rx_stats *stats)
1338 {
1339 struct libipw_network network_resp = {
1340 .ibss_dfs = NULL,
1341 };
1342 struct libipw_network *network = &network_resp;
1343 struct net_device *dev = ieee->dev;
1344
1345 network->flags = 0;
1346 network->qos_data.active = 0;
1347 network->qos_data.supported = 0;
1348 network->qos_data.param_count = 0;
1349 network->qos_data.old_param_count = 0;
1350
1351 //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1352 network->atim_window = le16_to_cpu(frame->aid);
1353 network->listen_interval = le16_to_cpu(frame->status);
1354 memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1355 network->capability = le16_to_cpu(frame->capability);
1356 network->last_scanned = jiffies;
1357 network->rates_len = network->rates_ex_len = 0;
1358 network->last_associate = 0;
1359 network->ssid_len = 0;
1360 network->erp_value =
1361 (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1362
1363 if (stats->freq == LIBIPW_52GHZ_BAND) {
1364 /* for A band (No DS info) */
1365 network->channel = stats->received_channel;
1366 } else
1367 network->flags |= NETWORK_HAS_CCK;
1368
1369 network->wpa_ie_len = 0;
1370 network->rsn_ie_len = 0;
1371
1372 if (libipw_parse_info_param
1373 (frame->info_element, stats->len - sizeof(*frame), network))
1374 return 1;
1375
1376 network->mode = 0;
1377 if (stats->freq == LIBIPW_52GHZ_BAND)
1378 network->mode = IEEE_A;
1379 else {
1380 if (network->flags & NETWORK_HAS_OFDM)
1381 network->mode |= IEEE_G;
1382 if (network->flags & NETWORK_HAS_CCK)
1383 network->mode |= IEEE_B;
1384 }
1385
1386 memcpy(&network->stats, stats, sizeof(network->stats));
1387
1388 if (ieee->handle_assoc_response != NULL)
1389 ieee->handle_assoc_response(dev, frame, network);
1390
1391 return 0;
1392 }
1393
1394 /***************************************************/
1395
1396 static int libipw_network_init(struct libipw_device *ieee, struct libipw_probe_response
1397 *beacon,
1398 struct libipw_network *network,
1399 struct libipw_rx_stats *stats)
1400 {
1401 DECLARE_SSID_BUF(ssid);
1402
1403 network->qos_data.active = 0;
1404 network->qos_data.supported = 0;
1405 network->qos_data.param_count = 0;
1406 network->qos_data.old_param_count = 0;
1407
1408 /* Pull out fixed field data */
1409 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1410 network->capability = le16_to_cpu(beacon->capability);
1411 network->last_scanned = jiffies;
1412 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1413 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1414 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1415 /* Where to pull this? beacon->listen_interval; */
1416 network->listen_interval = 0x0A;
1417 network->rates_len = network->rates_ex_len = 0;
1418 network->last_associate = 0;
1419 network->ssid_len = 0;
1420 network->flags = 0;
1421 network->atim_window = 0;
1422 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1423 0x3 : 0x0;
1424
1425 if (stats->freq == LIBIPW_52GHZ_BAND) {
1426 /* for A band (No DS info) */
1427 network->channel = stats->received_channel;
1428 } else
1429 network->flags |= NETWORK_HAS_CCK;
1430
1431 network->wpa_ie_len = 0;
1432 network->rsn_ie_len = 0;
1433
1434 if (libipw_parse_info_param
1435 (beacon->info_element, stats->len - sizeof(*beacon), network))
1436 return 1;
1437
1438 network->mode = 0;
1439 if (stats->freq == LIBIPW_52GHZ_BAND)
1440 network->mode = IEEE_A;
1441 else {
1442 if (network->flags & NETWORK_HAS_OFDM)
1443 network->mode |= IEEE_G;
1444 if (network->flags & NETWORK_HAS_CCK)
1445 network->mode |= IEEE_B;
1446 }
1447
1448 if (network->mode == 0) {
1449 LIBIPW_DEBUG_SCAN("Filtered out '%s (%pM)' "
1450 "network.\n",
1451 print_ssid(ssid, network->ssid,
1452 network->ssid_len),
1453 network->bssid);
1454 return 1;
1455 }
1456
1457 memcpy(&network->stats, stats, sizeof(network->stats));
1458
1459 return 0;
1460 }
1461
1462 static inline int is_same_network(struct libipw_network *src,
1463 struct libipw_network *dst)
1464 {
1465 /* A network is only a duplicate if the channel, BSSID, and ESSID
1466 * all match. We treat all <hidden> with the same BSSID and channel
1467 * as one network */
1468 return ((src->ssid_len == dst->ssid_len) &&
1469 (src->channel == dst->channel) &&
1470 !compare_ether_addr(src->bssid, dst->bssid) &&
1471 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1472 }
1473
1474 static void update_network(struct libipw_network *dst,
1475 struct libipw_network *src)
1476 {
1477 int qos_active;
1478 u8 old_param;
1479
1480 libipw_network_reset(dst);
1481 dst->ibss_dfs = src->ibss_dfs;
1482
1483 /* We only update the statistics if they were created by receiving
1484 * the network information on the actual channel the network is on.
1485 *
1486 * This keeps beacons received on neighbor channels from bringing
1487 * down the signal level of an AP. */
1488 if (dst->channel == src->stats.received_channel)
1489 memcpy(&dst->stats, &src->stats,
1490 sizeof(struct libipw_rx_stats));
1491 else
1492 LIBIPW_DEBUG_SCAN("Network %pM info received "
1493 "off channel (%d vs. %d)\n", src->bssid,
1494 dst->channel, src->stats.received_channel);
1495
1496 dst->capability = src->capability;
1497 memcpy(dst->rates, src->rates, src->rates_len);
1498 dst->rates_len = src->rates_len;
1499 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1500 dst->rates_ex_len = src->rates_ex_len;
1501
1502 dst->mode = src->mode;
1503 dst->flags = src->flags;
1504 dst->time_stamp[0] = src->time_stamp[0];
1505 dst->time_stamp[1] = src->time_stamp[1];
1506
1507 dst->beacon_interval = src->beacon_interval;
1508 dst->listen_interval = src->listen_interval;
1509 dst->atim_window = src->atim_window;
1510 dst->erp_value = src->erp_value;
1511 dst->tim = src->tim;
1512
1513 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1514 dst->wpa_ie_len = src->wpa_ie_len;
1515 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1516 dst->rsn_ie_len = src->rsn_ie_len;
1517
1518 dst->last_scanned = jiffies;
1519 qos_active = src->qos_data.active;
1520 old_param = dst->qos_data.old_param_count;
1521 if (dst->flags & NETWORK_HAS_QOS_MASK)
1522 memcpy(&dst->qos_data, &src->qos_data,
1523 sizeof(struct libipw_qos_data));
1524 else {
1525 dst->qos_data.supported = src->qos_data.supported;
1526 dst->qos_data.param_count = src->qos_data.param_count;
1527 }
1528
1529 if (dst->qos_data.supported == 1) {
1530 if (dst->ssid_len)
1531 LIBIPW_DEBUG_QOS
1532 ("QoS the network %s is QoS supported\n",
1533 dst->ssid);
1534 else
1535 LIBIPW_DEBUG_QOS
1536 ("QoS the network is QoS supported\n");
1537 }
1538 dst->qos_data.active = qos_active;
1539 dst->qos_data.old_param_count = old_param;
1540
1541 /* dst->last_associate is not overwritten */
1542 }
1543
1544 static inline int is_beacon(__le16 fc)
1545 {
1546 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1547 }
1548
1549 static void libipw_process_probe_response(struct libipw_device
1550 *ieee, struct
1551 libipw_probe_response
1552 *beacon, struct libipw_rx_stats
1553 *stats)
1554 {
1555 struct net_device *dev = ieee->dev;
1556 struct libipw_network network = {
1557 .ibss_dfs = NULL,
1558 };
1559 struct libipw_network *target;
1560 struct libipw_network *oldest = NULL;
1561 #ifdef CONFIG_LIBIPW_DEBUG
1562 struct libipw_info_element *info_element = beacon->info_element;
1563 #endif
1564 unsigned long flags;
1565 DECLARE_SSID_BUF(ssid);
1566
1567 LIBIPW_DEBUG_SCAN("'%s' (%pM"
1568 "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1569 print_ssid(ssid, info_element->data, info_element->len),
1570 beacon->header.addr3,
1571 (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1572 (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1573 (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1574 (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1575 (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1576 (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1577 (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1578 (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1579 (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1580 (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1581 (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1582 (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1583 (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1584 (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1585 (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1586 (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1587
1588 if (libipw_network_init(ieee, beacon, &network, stats)) {
1589 LIBIPW_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
1590 print_ssid(ssid, info_element->data,
1591 info_element->len),
1592 beacon->header.addr3,
1593 is_beacon(beacon->header.frame_ctl) ?
1594 "BEACON" : "PROBE RESPONSE");
1595 return;
1596 }
1597
1598 /* The network parsed correctly -- so now we scan our known networks
1599 * to see if we can find it in our list.
1600 *
1601 * NOTE: This search is definitely not optimized. Once its doing
1602 * the "right thing" we'll optimize it for efficiency if
1603 * necessary */
1604
1605 /* Search for this entry in the list and update it if it is
1606 * already there. */
1607
1608 spin_lock_irqsave(&ieee->lock, flags);
1609
1610 list_for_each_entry(target, &ieee->network_list, list) {
1611 if (is_same_network(target, &network))
1612 break;
1613
1614 if ((oldest == NULL) ||
1615 time_before(target->last_scanned, oldest->last_scanned))
1616 oldest = target;
1617 }
1618
1619 /* If we didn't find a match, then get a new network slot to initialize
1620 * with this beacon's information */
1621 if (&target->list == &ieee->network_list) {
1622 if (list_empty(&ieee->network_free_list)) {
1623 /* If there are no more slots, expire the oldest */
1624 list_del(&oldest->list);
1625 target = oldest;
1626 LIBIPW_DEBUG_SCAN("Expired '%s' (%pM) from "
1627 "network list.\n",
1628 print_ssid(ssid, target->ssid,
1629 target->ssid_len),
1630 target->bssid);
1631 libipw_network_reset(target);
1632 } else {
1633 /* Otherwise just pull from the free list */
1634 target = list_entry(ieee->network_free_list.next,
1635 struct libipw_network, list);
1636 list_del(ieee->network_free_list.next);
1637 }
1638
1639 #ifdef CONFIG_LIBIPW_DEBUG
1640 LIBIPW_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
1641 print_ssid(ssid, network.ssid,
1642 network.ssid_len),
1643 network.bssid,
1644 is_beacon(beacon->header.frame_ctl) ?
1645 "BEACON" : "PROBE RESPONSE");
1646 #endif
1647 memcpy(target, &network, sizeof(*target));
1648 network.ibss_dfs = NULL;
1649 list_add_tail(&target->list, &ieee->network_list);
1650 } else {
1651 LIBIPW_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
1652 print_ssid(ssid, target->ssid,
1653 target->ssid_len),
1654 target->bssid,
1655 is_beacon(beacon->header.frame_ctl) ?
1656 "BEACON" : "PROBE RESPONSE");
1657 update_network(target, &network);
1658 network.ibss_dfs = NULL;
1659 }
1660
1661 spin_unlock_irqrestore(&ieee->lock, flags);
1662
1663 if (is_beacon(beacon->header.frame_ctl)) {
1664 if (ieee->handle_beacon != NULL)
1665 ieee->handle_beacon(dev, beacon, target);
1666 } else {
1667 if (ieee->handle_probe_response != NULL)
1668 ieee->handle_probe_response(dev, beacon, target);
1669 }
1670 }
1671
1672 void libipw_rx_mgt(struct libipw_device *ieee,
1673 struct libipw_hdr_4addr *header,
1674 struct libipw_rx_stats *stats)
1675 {
1676 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1677 case IEEE80211_STYPE_ASSOC_RESP:
1678 LIBIPW_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1679 WLAN_FC_GET_STYPE(le16_to_cpu
1680 (header->frame_ctl)));
1681 libipw_handle_assoc_resp(ieee,
1682 (struct libipw_assoc_response *)
1683 header, stats);
1684 break;
1685
1686 case IEEE80211_STYPE_REASSOC_RESP:
1687 LIBIPW_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1688 WLAN_FC_GET_STYPE(le16_to_cpu
1689 (header->frame_ctl)));
1690 break;
1691
1692 case IEEE80211_STYPE_PROBE_REQ:
1693 LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1694 WLAN_FC_GET_STYPE(le16_to_cpu
1695 (header->frame_ctl)));
1696
1697 if (ieee->handle_probe_request != NULL)
1698 ieee->handle_probe_request(ieee->dev,
1699 (struct
1700 libipw_probe_request *)
1701 header, stats);
1702 break;
1703
1704 case IEEE80211_STYPE_PROBE_RESP:
1705 LIBIPW_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1706 WLAN_FC_GET_STYPE(le16_to_cpu
1707 (header->frame_ctl)));
1708 LIBIPW_DEBUG_SCAN("Probe response\n");
1709 libipw_process_probe_response(ieee,
1710 (struct
1711 libipw_probe_response *)
1712 header, stats);
1713 break;
1714
1715 case IEEE80211_STYPE_BEACON:
1716 LIBIPW_DEBUG_MGMT("received BEACON (%d)\n",
1717 WLAN_FC_GET_STYPE(le16_to_cpu
1718 (header->frame_ctl)));
1719 LIBIPW_DEBUG_SCAN("Beacon\n");
1720 libipw_process_probe_response(ieee,
1721 (struct
1722 libipw_probe_response *)
1723 header, stats);
1724 break;
1725 case IEEE80211_STYPE_AUTH:
1726
1727 LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1728 WLAN_FC_GET_STYPE(le16_to_cpu
1729 (header->frame_ctl)));
1730
1731 if (ieee->handle_auth != NULL)
1732 ieee->handle_auth(ieee->dev,
1733 (struct libipw_auth *)header);
1734 break;
1735
1736 case IEEE80211_STYPE_DISASSOC:
1737 if (ieee->handle_disassoc != NULL)
1738 ieee->handle_disassoc(ieee->dev,
1739 (struct libipw_disassoc *)
1740 header);
1741 break;
1742
1743 case IEEE80211_STYPE_ACTION:
1744 LIBIPW_DEBUG_MGMT("ACTION\n");
1745 if (ieee->handle_action)
1746 ieee->handle_action(ieee->dev,
1747 (struct libipw_action *)
1748 header, stats);
1749 break;
1750
1751 case IEEE80211_STYPE_REASSOC_REQ:
1752 LIBIPW_DEBUG_MGMT("received reassoc (%d)\n",
1753 WLAN_FC_GET_STYPE(le16_to_cpu
1754 (header->frame_ctl)));
1755
1756 LIBIPW_DEBUG_MGMT("%s: LIBIPW_REASSOC_REQ received\n",
1757 ieee->dev->name);
1758 if (ieee->handle_reassoc_request != NULL)
1759 ieee->handle_reassoc_request(ieee->dev,
1760 (struct libipw_reassoc_request *)
1761 header);
1762 break;
1763
1764 case IEEE80211_STYPE_ASSOC_REQ:
1765 LIBIPW_DEBUG_MGMT("received assoc (%d)\n",
1766 WLAN_FC_GET_STYPE(le16_to_cpu
1767 (header->frame_ctl)));
1768
1769 LIBIPW_DEBUG_MGMT("%s: LIBIPW_ASSOC_REQ received\n",
1770 ieee->dev->name);
1771 if (ieee->handle_assoc_request != NULL)
1772 ieee->handle_assoc_request(ieee->dev);
1773 break;
1774
1775 case IEEE80211_STYPE_DEAUTH:
1776 LIBIPW_DEBUG_MGMT("DEAUTH\n");
1777 if (ieee->handle_deauth != NULL)
1778 ieee->handle_deauth(ieee->dev,
1779 (struct libipw_deauth *)
1780 header);
1781 break;
1782 default:
1783 LIBIPW_DEBUG_MGMT("received UNKNOWN (%d)\n",
1784 WLAN_FC_GET_STYPE(le16_to_cpu
1785 (header->frame_ctl)));
1786 LIBIPW_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1787 ieee->dev->name,
1788 WLAN_FC_GET_STYPE(le16_to_cpu
1789 (header->frame_ctl)));
1790 break;
1791 }
1792 }
1793
1794 EXPORT_SYMBOL_GPL(libipw_rx_any);
1795 EXPORT_SYMBOL(libipw_rx_mgt);
1796 EXPORT_SYMBOL(libipw_rx);
Tomato firmware and modifications.