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Staging: rtl8187se: rename struct ieee80211_hdr_3addr_qos to struct ieee80211_hdr_3ad...
[linux-2.6/kvm.git] / drivers / staging / rtl8187se / ieee80211 / ieee80211_rx.c
blob614415531a66c8e7226285c29bfc80e15b0d11cf
1 /*
2 * Original code based Host AP (software wireless LAN access point) driver
3 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
4 *
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6 * <jkmaline@cc.hut.fi>
7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
8 * Copyright (c) 2004, Intel Corporation
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation. See README and COPYING for
13 * more details.
14 ******************************************************************************
15
16 Few modifications for Realtek's Wi-Fi drivers by
17 Andrea Merello <andreamrl@tiscali.it>
18
19 A special thanks goes to Realtek for their support !
20
21 ******************************************************************************/
22
23
24 #include <linux/compiler.h>
25 //#include <linux/config.h>
26 #include <linux/errno.h>
27 #include <linux/if_arp.h>
28 #include <linux/in6.h>
29 #include <linux/in.h>
30 #include <linux/ip.h>
31 #include <linux/kernel.h>
32 #include <linux/module.h>
33 #include <linux/netdevice.h>
34 #include <linux/pci.h>
35 #include <linux/proc_fs.h>
36 #include <linux/skbuff.h>
37 #include <linux/slab.h>
38 #include <linux/tcp.h>
39 #include <linux/types.h>
40 #include <linux/version.h>
41 #include <linux/wireless.h>
42 #include <linux/etherdevice.h>
43 #include <asm/uaccess.h>
44 #include <linux/ctype.h>
45
46 #include "ieee80211.h"
47 #include "dot11d.h"
48 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
49 struct sk_buff *skb,
50 struct ieee80211_rx_stats *rx_stats)
51 {
52 struct ieee80211_hdr_4addr *hdr =
53 (struct ieee80211_hdr_4addr *)skb->data;
54 u16 fc = le16_to_cpu(hdr->frame_ctl);
55
56 skb->dev = ieee->dev;
57 skb_reset_mac_header(skb);
58 skb_pull(skb, ieee80211_get_hdrlen(fc));
59 skb->pkt_type = PACKET_OTHERHOST;
60 skb->protocol = __constant_htons(ETH_P_80211_RAW);
61 memset(skb->cb, 0, sizeof(skb->cb));
62 netif_rx(skb);
63 }
64
65
66 /* Called only as a tasklet (software IRQ) */
67 static struct ieee80211_frag_entry *
68 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
69 unsigned int frag, u8 tid,u8 *src, u8 *dst)
70 {
71 struct ieee80211_frag_entry *entry;
72 int i;
73
74 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
75 entry = &ieee->frag_cache[tid][i];
76 if (entry->skb != NULL &&
77 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
78 IEEE80211_DEBUG_FRAG(
79 "expiring fragment cache entry "
80 "seq=%u last_frag=%u\n",
81 entry->seq, entry->last_frag);
82 dev_kfree_skb_any(entry->skb);
83 entry->skb = NULL;
84 }
85
86 if (entry->skb != NULL && entry->seq == seq &&
87 (entry->last_frag + 1 == frag || frag == -1) &&
88 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
89 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
90 return entry;
91 }
92
93 return NULL;
94 }
95
96 /* Called only as a tasklet (software IRQ) */
97 static struct sk_buff *
98 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
99 struct ieee80211_hdr_4addr *hdr)
100 {
101 struct sk_buff *skb = NULL;
102 u16 fc = le16_to_cpu(hdr->frame_ctl);
103 u16 sc = le16_to_cpu(hdr->seq_ctl);
104 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
105 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
106 struct ieee80211_frag_entry *entry;
107 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
108 struct ieee80211_hdr_QOS *hdr_4addr_QoS;
109 u8 tid;
110
111 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
112 hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr;
113 tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
114 tid = UP2AC(tid);
115 tid ++;
116 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
117 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
118 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
119 tid = UP2AC(tid);
120 tid ++;
121 } else {
122 tid = 0;
123 }
124
125 if (frag == 0) {
126 /* Reserve enough space to fit maximum frame length */
127 skb = dev_alloc_skb(ieee->dev->mtu +
128 sizeof(struct ieee80211_hdr_4addr) +
129 8 /* LLC */ +
130 2 /* alignment */ +
131 8 /* WEP */ +
132 ETH_ALEN /* WDS */ +
133 (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
134 if (skb == NULL)
135 return NULL;
136
137 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
138 ieee->frag_next_idx[tid]++;
139 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
140 ieee->frag_next_idx[tid] = 0;
141
142 if (entry->skb != NULL)
143 dev_kfree_skb_any(entry->skb);
144
145 entry->first_frag_time = jiffies;
146 entry->seq = seq;
147 entry->last_frag = frag;
148 entry->skb = skb;
149 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
150 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
151 } else {
152 /* received a fragment of a frame for which the head fragment
153 * should have already been received */
154 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
155 hdr->addr1);
156 if (entry != NULL) {
157 entry->last_frag = frag;
158 skb = entry->skb;
159 }
160 }
161
162 return skb;
163 }
164
165
166 /* Called only as a tasklet (software IRQ) */
167 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
168 struct ieee80211_hdr_4addr *hdr)
169 {
170 u16 fc = le16_to_cpu(hdr->frame_ctl);
171 u16 sc = le16_to_cpu(hdr->seq_ctl);
172 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
173 struct ieee80211_frag_entry *entry;
174 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
175 struct ieee80211_hdr_QOS *hdr_4addr_QoS;
176 u8 tid;
177
178 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
179 hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr;
180 tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
181 tid = UP2AC(tid);
182 tid ++;
183 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
184 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
185 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
186 tid = UP2AC(tid);
187 tid ++;
188 } else {
189 tid = 0;
190 }
191
192 entry = ieee80211_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
193 hdr->addr1);
194
195 if (entry == NULL) {
196 IEEE80211_DEBUG_FRAG(
197 "could not invalidate fragment cache "
198 "entry (seq=%u)\n", seq);
199 return -1;
200 }
201
202 entry->skb = NULL;
203 return 0;
204 }
205
206
207
208 /* ieee80211_rx_frame_mgtmt
209 *
210 * Responsible for handling management control frames
211 *
212 * Called by ieee80211_rx */
213 static inline int
214 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
215 struct ieee80211_rx_stats *rx_stats, u16 type,
216 u16 stype)
217 {
218 struct ieee80211_hdr_4addr *hdr;
219
220 // cheat the the hdr type
221 hdr = (struct ieee80211_hdr_4addr *)skb->data;
222
223 /* On the struct stats definition there is written that
224 * this is not mandatory.... but seems that the probe
225 * response parser uses it
226 */
227 rx_stats->len = skb->len;
228 ieee80211_rx_mgt(ieee, (struct ieee80211_hdr_4addr *)skb->data,
229 rx_stats);
230
231 if((ieee->state == IEEE80211_LINKED)&&(memcmp(hdr->addr3,ieee->current_network.bssid,ETH_ALEN))) {
232 dev_kfree_skb_any(skb);
233 return 0;
234 }
235
236 ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
237
238 dev_kfree_skb_any(skb);
239
240 return 0;
241
242 }
243
244
245
246 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
247 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
248 static unsigned char rfc1042_header[] =
249 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
250 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
251 static unsigned char bridge_tunnel_header[] =
252 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
253 /* No encapsulation header if EtherType < 0x600 (=length) */
254
255 /* Called by ieee80211_rx_frame_decrypt */
256 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
257 struct sk_buff *skb, size_t hdrlen)
258 {
259 struct net_device *dev = ieee->dev;
260 u16 fc, ethertype;
261 struct ieee80211_hdr_4addr *hdr;
262 u8 *pos;
263
264 if (skb->len < 24)
265 return 0;
266
267 hdr = (struct ieee80211_hdr_4addr *)skb->data;
268 fc = le16_to_cpu(hdr->frame_ctl);
269
270 /* check that the frame is unicast frame to us */
271 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
272 IEEE80211_FCTL_TODS &&
273 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
274 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
275 /* ToDS frame with own addr BSSID and DA */
276 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
277 IEEE80211_FCTL_FROMDS &&
278 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
279 /* FromDS frame with own addr as DA */
280 } else
281 return 0;
282
283 if (skb->len < 24 + 8)
284 return 0;
285
286 /* check for port access entity Ethernet type */
287 // pos = skb->data + 24;
288 pos = skb->data + hdrlen;
289 ethertype = (pos[6] << 8) | pos[7];
290 if (ethertype == ETH_P_PAE)
291 return 1;
292
293 return 0;
294 }
295
296 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
297 static inline int
298 ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
299 struct ieee80211_crypt_data *crypt)
300 {
301 struct ieee80211_hdr_4addr *hdr;
302 int res, hdrlen;
303
304 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
305 return 0;
306
307 hdr = (struct ieee80211_hdr_4addr *)skb->data;
308 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
309
310 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
311 if (ieee->tkip_countermeasures &&
312 strcmp(crypt->ops->name, "TKIP") == 0) {
313 if (net_ratelimit()) {
314 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
315 "received packet from " MAC_FMT "\n",
316 ieee->dev->name, MAC_ARG(hdr->addr2));
317 }
318 return -1;
319 }
320 #endif
321
322 atomic_inc(&crypt->refcnt);
323 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
324 atomic_dec(&crypt->refcnt);
325 if (res < 0) {
326 IEEE80211_DEBUG_DROP(
327 "decryption failed (SA=" MAC_FMT
328 ") res=%d\n", MAC_ARG(hdr->addr2), res);
329 if (res == -2)
330 IEEE80211_DEBUG_DROP("Decryption failed ICV "
331 "mismatch (key %d)\n",
332 skb->data[hdrlen + 3] >> 6);
333 ieee->ieee_stats.rx_discards_undecryptable++;
334 return -1;
335 }
336
337 return res;
338 }
339
340
341 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
342 static inline int
343 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
344 int keyidx, struct ieee80211_crypt_data *crypt)
345 {
346 struct ieee80211_hdr_4addr *hdr;
347 int res, hdrlen;
348
349 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
350 return 0;
351
352 hdr = (struct ieee80211_hdr_4addr *)skb->data;
353 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
354
355 atomic_inc(&crypt->refcnt);
356 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
357 atomic_dec(&crypt->refcnt);
358 if (res < 0) {
359 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
360 " (SA=" MAC_FMT " keyidx=%d)\n",
361 ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
362 return -1;
363 }
364
365 return 0;
366 }
367
368
369 /* this function is stolen from ipw2200 driver*/
370 #define IEEE_PACKET_RETRY_TIME (5*HZ)
371 static int is_duplicate_packet(struct ieee80211_device *ieee,
372 struct ieee80211_hdr_4addr *header)
373 {
374 u16 fc = le16_to_cpu(header->frame_ctl);
375 u16 sc = le16_to_cpu(header->seq_ctl);
376 u16 seq = WLAN_GET_SEQ_SEQ(sc);
377 u16 frag = WLAN_GET_SEQ_FRAG(sc);
378 u16 *last_seq, *last_frag;
379 unsigned long *last_time;
380 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
381 struct ieee80211_hdr_QOS *hdr_4addr_QoS;
382 u8 tid;
383
384 //TO2DS and QoS
385 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
386 hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)header;
387 tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
388 tid = UP2AC(tid);
389 tid ++;
390 } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
391 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)header;
392 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
393 tid = UP2AC(tid);
394 tid ++;
395 } else { // no QoS
396 tid = 0;
397 }
398 switch (ieee->iw_mode) {
399 case IW_MODE_ADHOC:
400 {
401 struct list_head *p;
402 struct ieee_ibss_seq *entry = NULL;
403 u8 *mac = header->addr2;
404 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
405 //for (pos = (head)->next; pos != (head); pos = pos->next)
406 __list_for_each(p, &ieee->ibss_mac_hash[index]) {
407 entry = list_entry(p, struct ieee_ibss_seq, list);
408 if (!memcmp(entry->mac, mac, ETH_ALEN))
409 break;
410 }
411 // if (memcmp(entry->mac, mac, ETH_ALEN)){
412 if (p == &ieee->ibss_mac_hash[index]) {
413 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
414 if (!entry) {
415 printk(KERN_WARNING "Cannot malloc new mac entry\n");
416 return 0;
417 }
418 memcpy(entry->mac, mac, ETH_ALEN);
419 entry->seq_num[tid] = seq;
420 entry->frag_num[tid] = frag;
421 entry->packet_time[tid] = jiffies;
422 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
423 return 0;
424 }
425 last_seq = &entry->seq_num[tid];
426 last_frag = &entry->frag_num[tid];
427 last_time = &entry->packet_time[tid];
428 break;
429 }
430
431 case IW_MODE_INFRA:
432 last_seq = &ieee->last_rxseq_num[tid];
433 last_frag = &ieee->last_rxfrag_num[tid];
434 last_time = &ieee->last_packet_time[tid];
435
436 break;
437 default:
438 return 0;
439 }
440
441 // if(tid != 0) {
442 // printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
443 // }
444 if ((*last_seq == seq) &&
445 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
446 if (*last_frag == frag){
447 //printk(KERN_WARNING "[1] go drop!\n");
448 goto drop;
449
450 }
451 if (*last_frag + 1 != frag)
452 /* out-of-order fragment */
453 //printk(KERN_WARNING "[2] go drop!\n");
454 goto drop;
455 } else
456 *last_seq = seq;
457
458 *last_frag = frag;
459 *last_time = jiffies;
460 return 0;
461
462 drop:
463 // BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
464 // printk("DUP\n");
465
466 return 1;
467 }
468
469
470 /* All received frames are sent to this function. @skb contains the frame in
471 * IEEE 802.11 format, i.e., in the format it was sent over air.
472 * This function is called only as a tasklet (software IRQ). */
473 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
474 struct ieee80211_rx_stats *rx_stats)
475 {
476 struct net_device *dev = ieee->dev;
477 //struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
478 struct ieee80211_hdr_4addr *hdr;
479
480 size_t hdrlen;
481 u16 fc, type, stype, sc;
482 struct net_device_stats *stats;
483 unsigned int frag;
484 u8 *payload;
485 u16 ethertype;
486 u8 dst[ETH_ALEN];
487 u8 src[ETH_ALEN];
488 u8 bssid[ETH_ALEN];
489 struct ieee80211_crypt_data *crypt = NULL;
490 int keyidx = 0;
491
492 // cheat the the hdr type
493 hdr = (struct ieee80211_hdr_4addr *)skb->data;
494 stats = &ieee->stats;
495
496 if (skb->len < 10) {
497 printk(KERN_INFO "%s: SKB length < 10\n",
498 dev->name);
499 goto rx_dropped;
500 }
501
502 fc = le16_to_cpu(hdr->frame_ctl);
503 type = WLAN_FC_GET_TYPE(fc);
504 stype = WLAN_FC_GET_STYPE(fc);
505 sc = le16_to_cpu(hdr->seq_ctl);
506
507 frag = WLAN_GET_SEQ_FRAG(sc);
508
509 //YJ,add,080828,for keep alive
510 if((fc & IEEE80211_FCTL_TODS) != IEEE80211_FCTL_TODS)
511 {
512 if(!memcmp(hdr->addr1,dev->dev_addr, ETH_ALEN))
513 {
514 ieee->NumRxUnicast++;
515 }
516 }
517 else
518 {
519 if(!memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN))
520 {
521 ieee->NumRxUnicast++;
522 }
523 }
524 //YJ,add,080828,for keep alive,end
525
526 hdrlen = ieee80211_get_hdrlen(fc);
527
528
529 if (ieee->iw_mode == IW_MODE_MONITOR) {
530 ieee80211_monitor_rx(ieee, skb, rx_stats);
531 stats->rx_packets++;
532 stats->rx_bytes += skb->len;
533 return 1;
534 }
535
536 if (ieee->host_decrypt) {
537 int idx = 0;
538 if (skb->len >= hdrlen + 3)
539 idx = skb->data[hdrlen + 3] >> 6;
540 crypt = ieee->crypt[idx];
541
542 /* allow NULL decrypt to indicate an station specific override
543 * for default encryption */
544 if (crypt && (crypt->ops == NULL ||
545 crypt->ops->decrypt_mpdu == NULL))
546 crypt = NULL;
547
548 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
549 /* This seems to be triggered by some (multicast?)
550 * frames from other than current BSS, so just drop the
551 * frames silently instead of filling system log with
552 * these reports. */
553 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
554 " (SA=" MAC_FMT ")\n",
555 MAC_ARG(hdr->addr2));
556 ieee->ieee_stats.rx_discards_undecryptable++;
557 goto rx_dropped;
558 }
559 }
560
561 if (skb->len < IEEE80211_DATA_HDR3_LEN)
562 goto rx_dropped;
563
564 // if QoS enabled, should check the sequence for each of the AC
565 if (is_duplicate_packet(ieee, hdr))
566 goto rx_dropped;
567
568
569 if (type == IEEE80211_FTYPE_MGMT) {
570 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
571 goto rx_dropped;
572 else
573 goto rx_exit;
574 }
575
576 /* Data frame - extract src/dst addresses */
577 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
578 case IEEE80211_FCTL_FROMDS:
579 memcpy(dst, hdr->addr1, ETH_ALEN);
580 memcpy(src, hdr->addr3, ETH_ALEN);
581 memcpy(bssid,hdr->addr2,ETH_ALEN);
582 break;
583 case IEEE80211_FCTL_TODS:
584 memcpy(dst, hdr->addr3, ETH_ALEN);
585 memcpy(src, hdr->addr2, ETH_ALEN);
586 memcpy(bssid,hdr->addr1,ETH_ALEN);
587 break;
588 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
589 if (skb->len < IEEE80211_DATA_HDR4_LEN)
590 goto rx_dropped;
591 memcpy(dst, hdr->addr3, ETH_ALEN);
592 memcpy(src, hdr->addr4, ETH_ALEN);
593 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
594 break;
595 case 0:
596 memcpy(dst, hdr->addr1, ETH_ALEN);
597 memcpy(src, hdr->addr2, ETH_ALEN);
598 memcpy(bssid,hdr->addr3,ETH_ALEN);
599 break;
600 }
601
602
603 dev->last_rx = jiffies;
604
605
606 /* Nullfunc frames may have PS-bit set, so they must be passed to
607 * hostap_handle_sta_rx() before being dropped here. */
608 if (stype != IEEE80211_STYPE_DATA &&
609 stype != IEEE80211_STYPE_DATA_CFACK &&
610 stype != IEEE80211_STYPE_DATA_CFPOLL &&
611 stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
612 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
613 ) {
614 if (stype != IEEE80211_STYPE_NULLFUNC)
615 IEEE80211_DEBUG_DROP(
616 "RX: dropped data frame "
617 "with no data (type=0x%02x, "
618 "subtype=0x%02x, len=%d)\n",
619 type, stype, skb->len);
620 goto rx_dropped;
621 }
622 if(memcmp(bssid,ieee->current_network.bssid,ETH_ALEN)) {
623 goto rx_dropped;
624 }
625
626 ieee->NumRxDataInPeriod++;
627 ieee->NumRxOkTotal++;
628 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
629
630 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
631 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
632 goto rx_dropped;
633
634 hdr = (struct ieee80211_hdr_4addr *)skb->data;
635
636 /* skb: hdr + (possibly fragmented) plaintext payload */
637 // PR: FIXME: hostap has additional conditions in the "if" below:
638 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
639 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
640 int flen;
641 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
642 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
643
644 if (!frag_skb) {
645 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
646 "Rx cannot get skb from fragment "
647 "cache (morefrag=%d seq=%u frag=%u)\n",
648 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
649 WLAN_GET_SEQ_SEQ(sc), frag);
650 goto rx_dropped;
651 }
652 flen = skb->len;
653 if (frag != 0)
654 flen -= hdrlen;
655
656 if (frag_skb->tail + flen > frag_skb->end) {
657 printk(KERN_WARNING "%s: host decrypted and "
658 "reassembled frame did not fit skb\n",
659 dev->name);
660 ieee80211_frag_cache_invalidate(ieee, hdr);
661 goto rx_dropped;
662 }
663
664 if (frag == 0) {
665 /* copy first fragment (including full headers) into
666 * beginning of the fragment cache skb */
667 memcpy(skb_put(frag_skb, flen), skb->data, flen);
668 } else {
669 /* append frame payload to the end of the fragment
670 * cache skb */
671 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
672 flen);
673 }
674 dev_kfree_skb_any(skb);
675 skb = NULL;
676
677 if (fc & IEEE80211_FCTL_MOREFRAGS) {
678 /* more fragments expected - leave the skb in fragment
679 * cache for now; it will be delivered to upper layers
680 * after all fragments have been received */
681 goto rx_exit;
682 }
683
684 /* this was the last fragment and the frame will be
685 * delivered, so remove skb from fragment cache */
686 skb = frag_skb;
687 hdr = (struct ieee80211_hdr_4addr *)skb->data;
688 ieee80211_frag_cache_invalidate(ieee, hdr);
689 }
690
691 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
692 * encrypted/authenticated */
693 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
694 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
695 goto rx_dropped;
696
697 hdr = (struct ieee80211_hdr_4addr *)skb->data;
698 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
699 if (/*ieee->ieee802_1x &&*/
700 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
701
702 #ifdef CONFIG_IEEE80211_DEBUG
703 /* pass unencrypted EAPOL frames even if encryption is
704 * configured */
705 struct eapol *eap = (struct eapol *)(skb->data +
706 24);
707 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
708 eap_get_type(eap->type));
709 #endif
710 } else {
711 IEEE80211_DEBUG_DROP(
712 "encryption configured, but RX "
713 "frame not encrypted (SA=" MAC_FMT ")\n",
714 MAC_ARG(hdr->addr2));
715 goto rx_dropped;
716 }
717 }
718
719 #ifdef CONFIG_IEEE80211_DEBUG
720 if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
721 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
722 struct eapol *eap = (struct eapol *)(skb->data +
723 24);
724 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
725 eap_get_type(eap->type));
726 }
727 #endif
728
729 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
730 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
731 IEEE80211_DEBUG_DROP(
732 "dropped unencrypted RX data "
733 "frame from " MAC_FMT
734 " (drop_unencrypted=1)\n",
735 MAC_ARG(hdr->addr2));
736 goto rx_dropped;
737 }
738 /*
739 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
740 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
741 }
742 */
743 /* skb: hdr + (possible reassembled) full plaintext payload */
744 payload = skb->data + hdrlen;
745 ethertype = (payload[6] << 8) | payload[7];
746
747
748 /* convert hdr + possible LLC headers into Ethernet header */
749 if (skb->len - hdrlen >= 8 &&
750 ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
751 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
752 memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
753 /* remove RFC1042 or Bridge-Tunnel encapsulation and
754 * replace EtherType */
755 skb_pull(skb, hdrlen + SNAP_SIZE);
756 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
757 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
758 } else {
759 u16 len;
760 /* Leave Ethernet header part of hdr and full payload */
761 skb_pull(skb, hdrlen);
762 len = htons(skb->len);
763 memcpy(skb_push(skb, 2), &len, 2);
764 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
765 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
766 }
767
768
769 stats->rx_packets++;
770 stats->rx_bytes += skb->len;
771
772 if (skb) {
773 skb->protocol = eth_type_trans(skb, dev);
774 memset(skb->cb, 0, sizeof(skb->cb));
775 skb->dev = dev;
776 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
777 ieee->last_rx_ps_time = jiffies;
778 netif_rx(skb);
779 }
780
781 rx_exit:
782 return 1;
783
784 rx_dropped:
785 stats->rx_dropped++;
786
787 /* Returning 0 indicates to caller that we have not handled the SKB--
788 * so it is still allocated and can be used again by underlying
789 * hardware as a DMA target */
790 return 0;
791 }
792
793 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
794
795 static inline int ieee80211_is_ofdm_rate(u8 rate)
796 {
797 switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
798 case IEEE80211_OFDM_RATE_6MB:
799 case IEEE80211_OFDM_RATE_9MB:
800 case IEEE80211_OFDM_RATE_12MB:
801 case IEEE80211_OFDM_RATE_18MB:
802 case IEEE80211_OFDM_RATE_24MB:
803 case IEEE80211_OFDM_RATE_36MB:
804 case IEEE80211_OFDM_RATE_48MB:
805 case IEEE80211_OFDM_RATE_54MB:
806 return 1;
807 }
808 return 0;
809 }
810
811 static inline int ieee80211_SignalStrengthTranslate(
812 int CurrSS
813 )
814 {
815 int RetSS;
816
817 // Step 1. Scale mapping.
818 if(CurrSS >= 71 && CurrSS <= 100)
819 {
820 RetSS = 90 + ((CurrSS - 70) / 3);
821 }
822 else if(CurrSS >= 41 && CurrSS <= 70)
823 {
824 RetSS = 78 + ((CurrSS - 40) / 3);
825 }
826 else if(CurrSS >= 31 && CurrSS <= 40)
827 {
828 RetSS = 66 + (CurrSS - 30);
829 }
830 else if(CurrSS >= 21 && CurrSS <= 30)
831 {
832 RetSS = 54 + (CurrSS - 20);
833 }
834 else if(CurrSS >= 5 && CurrSS <= 20)
835 {
836 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
837 }
838 else if(CurrSS == 4)
839 {
840 RetSS = 36;
841 }
842 else if(CurrSS == 3)
843 {
844 RetSS = 27;
845 }
846 else if(CurrSS == 2)
847 {
848 RetSS = 18;
849 }
850 else if(CurrSS == 1)
851 {
852 RetSS = 9;
853 }
854 else
855 {
856 RetSS = CurrSS;
857 }
858 //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
859
860 // Step 2. Smoothing.
861
862 //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
863
864 return RetSS;
865 }
866
867 static inline void ieee80211_extract_country_ie(
868 struct ieee80211_device *ieee,
869 struct ieee80211_info_element *info_element,
870 struct ieee80211_network *network,
871 u8 * addr2
872 )
873 {
874 if(IS_DOT11D_ENABLE(ieee))
875 {
876 if(info_element->len!= 0)
877 {
878 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
879 network->CountryIeLen = info_element->len;
880
881 if(!IS_COUNTRY_IE_VALID(ieee))
882 {
883 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
884 }
885 }
886
887 //
888 // 070305, rcnjko: I update country IE watch dog here because
889 // some AP (e.g. Cisco 1242) don't include country IE in their
890 // probe response frame.
891 //
892 if(IS_EQUAL_CIE_SRC(ieee, addr2) )
893 {
894 UPDATE_CIE_WATCHDOG(ieee);
895 }
896 }
897
898 }
899
900 int
901 ieee80211_TranslateToDbm(
902 unsigned char SignalStrengthIndex // 0-100 index.
903 )
904 {
905 unsigned char SignalPower; // in dBm.
906
907 // Translate to dBm (x=0.5y-95).
908 SignalPower = (int)SignalStrengthIndex * 7 / 10;
909 SignalPower -= 95;
910
911 return SignalPower;
912 }
913 inline int ieee80211_network_init(
914 struct ieee80211_device *ieee,
915 struct ieee80211_probe_response *beacon,
916 struct ieee80211_network *network,
917 struct ieee80211_rx_stats *stats)
918 {
919 #ifdef CONFIG_IEEE80211_DEBUG
920 char rates_str[64];
921 char *p;
922 #endif
923 struct ieee80211_info_element *info_element;
924 u16 left;
925 u8 i;
926 short offset;
927 u8 curRate = 0,hOpRate = 0,curRate_ex = 0;
928
929 /* Pull out fixed field data */
930 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
931 network->capability = beacon->capability;
932 network->last_scanned = jiffies;
933 network->time_stamp[0] = beacon->time_stamp[0];
934 network->time_stamp[1] = beacon->time_stamp[1];
935 network->beacon_interval = beacon->beacon_interval;
936 /* Where to pull this? beacon->listen_interval;*/
937 network->listen_interval = 0x0A;
938 network->rates_len = network->rates_ex_len = 0;
939 network->last_associate = 0;
940 network->ssid_len = 0;
941 network->flags = 0;
942 network->atim_window = 0;
943 network->QoS_Enable = 0;
944 //by amy 080312
945 network->HighestOperaRate = 0;
946 //by amy 080312
947 network->Turbo_Enable = 0;
948 network->CountryIeLen = 0;
949 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
950
951 if (stats->freq == IEEE80211_52GHZ_BAND) {
952 /* for A band (No DS info) */
953 network->channel = stats->received_channel;
954 } else
955 network->flags |= NETWORK_HAS_CCK;
956
957 network->wpa_ie_len = 0;
958 network->rsn_ie_len = 0;
959
960 info_element = &beacon->info_element;
961 left = stats->len - ((void *)info_element - (void *)beacon);
962 while (left >= sizeof(struct ieee80211_info_element_hdr)) {
963 if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) {
964 IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n",
965 info_element->len + sizeof(struct ieee80211_info_element),
966 left);
967 return 1;
968 }
969
970 switch (info_element->id) {
971 case MFIE_TYPE_SSID:
972 if (ieee80211_is_empty_essid(info_element->data,
973 info_element->len)) {
974 network->flags |= NETWORK_EMPTY_ESSID;
975 break;
976 }
977
978 network->ssid_len = min(info_element->len,
979 (u8)IW_ESSID_MAX_SIZE);
980 memcpy(network->ssid, info_element->data, network->ssid_len);
981 if (network->ssid_len < IW_ESSID_MAX_SIZE)
982 memset(network->ssid + network->ssid_len, 0,
983 IW_ESSID_MAX_SIZE - network->ssid_len);
984
985 IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n",
986 network->ssid, network->ssid_len);
987 break;
988
989 case MFIE_TYPE_RATES:
990 #ifdef CONFIG_IEEE80211_DEBUG
991 p = rates_str;
992 #endif
993 network->rates_len = min(info_element->len, MAX_RATES_LENGTH);
994 for (i = 0; i < network->rates_len; i++) {
995 network->rates[i] = info_element->data[i];
996 curRate = network->rates[i] & 0x7f;
997 if( hOpRate < curRate )
998 hOpRate = curRate;
999 #ifdef CONFIG_IEEE80211_DEBUG
1000 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
1001 #endif
1002 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
1003 network->flags |= NETWORK_HAS_OFDM;
1004 if (info_element->data[i] &
1005 IEEE80211_BASIC_RATE_MASK)
1006 network->flags &=
1007 ~NETWORK_HAS_CCK;
1008 }
1009 }
1010
1011 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n",
1012 rates_str, network->rates_len);
1013 break;
1014
1015 case MFIE_TYPE_RATES_EX:
1016 #ifdef CONFIG_IEEE80211_DEBUG
1017 p = rates_str;
1018 #endif
1019 network->rates_ex_len = min(info_element->len, MAX_RATES_EX_LENGTH);
1020 for (i = 0; i < network->rates_ex_len; i++) {
1021 network->rates_ex[i] = info_element->data[i];
1022 curRate_ex = network->rates_ex[i] & 0x7f;
1023 if( hOpRate < curRate_ex )
1024 hOpRate = curRate_ex;
1025 #ifdef CONFIG_IEEE80211_DEBUG
1026 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
1027 #endif
1028 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
1029 network->flags |= NETWORK_HAS_OFDM;
1030 if (info_element->data[i] &
1031 IEEE80211_BASIC_RATE_MASK)
1032 network->flags &=
1033 ~NETWORK_HAS_CCK;
1034 }
1035 }
1036
1037 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1038 rates_str, network->rates_ex_len);
1039 break;
1040
1041 case MFIE_TYPE_DS_SET:
1042 IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
1043 info_element->data[0]);
1044 if (stats->freq == IEEE80211_24GHZ_BAND)
1045 network->channel = info_element->data[0];
1046 break;
1047
1048 case MFIE_TYPE_FH_SET:
1049 IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
1050 break;
1051
1052 case MFIE_TYPE_CF_SET:
1053 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
1054 break;
1055
1056 case MFIE_TYPE_TIM:
1057
1058 if(info_element->len < 4)
1059 break;
1060
1061 network->dtim_period = info_element->data[1];
1062
1063 if(ieee->state != IEEE80211_LINKED)
1064 break;
1065
1066 network->last_dtim_sta_time[0] = jiffies;
1067 network->last_dtim_sta_time[1] = stats->mac_time[1];
1068
1069 network->dtim_data = IEEE80211_DTIM_VALID;
1070
1071 if(info_element->data[0] != 0)
1072 break;
1073
1074 if(info_element->data[2] & 1)
1075 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1076
1077 offset = (info_element->data[2] >> 1)*2;
1078
1079 //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
1080
1081 /* add and modified for ps 2008.1.22 */
1082 if(ieee->assoc_id < 8*offset ||
1083 ieee->assoc_id > 8*(offset + info_element->len -3)) {
1084 break;
1085 }
1086
1087 offset = (ieee->assoc_id/8) - offset;// + ((aid % 8)? 0 : 1) ;
1088
1089 // printk("offset:%x data:%x, ucast:%d\n", offset,
1090 // info_element->data[3+offset] ,
1091 // info_element->data[3+offset] & (1<<(ieee->assoc_id%8)));
1092
1093 if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8))) {
1094 network->dtim_data |= IEEE80211_DTIM_UCAST;
1095 }
1096 break;
1097
1098 case MFIE_TYPE_IBSS_SET:
1099 IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
1100 break;
1101
1102 case MFIE_TYPE_CHALLENGE:
1103 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
1104 break;
1105
1106 case MFIE_TYPE_GENERIC:
1107 //nic is 87B
1108 IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
1109 info_element->len);
1110 if (info_element->len >= 4 &&
1111 info_element->data[0] == 0x00 &&
1112 info_element->data[1] == 0x50 &&
1113 info_element->data[2] == 0xf2 &&
1114 info_element->data[3] == 0x01) {
1115 network->wpa_ie_len = min(info_element->len + 2,
1116 MAX_WPA_IE_LEN);
1117 memcpy(network->wpa_ie, info_element,
1118 network->wpa_ie_len);
1119 }
1120
1121 if (info_element->len == 7 &&
1122 info_element->data[0] == 0x00 &&
1123 info_element->data[1] == 0xe0 &&
1124 info_element->data[2] == 0x4c &&
1125 info_element->data[3] == 0x01 &&
1126 info_element->data[4] == 0x02) {
1127 network->Turbo_Enable = 1;
1128 }
1129 if (1 == stats->nic_type) {//nic 87
1130 break;
1131 }
1132
1133 if (info_element->len >= 5 &&
1134 info_element->data[0] == 0x00 &&
1135 info_element->data[1] == 0x50 &&
1136 info_element->data[2] == 0xf2 &&
1137 info_element->data[3] == 0x02 &&
1138 info_element->data[4] == 0x00) {
1139 //printk(KERN_WARNING "wmm info updated: %x\n", info_element->data[6]);
1140 //WMM Information Element
1141 network->wmm_info = info_element->data[6];
1142 network->QoS_Enable = 1;
1143 }
1144
1145 if (info_element->len >= 8 &&
1146 info_element->data[0] == 0x00 &&
1147 info_element->data[1] == 0x50 &&
1148 info_element->data[2] == 0xf2 &&
1149 info_element->data[3] == 0x02 &&
1150 info_element->data[4] == 0x01) {
1151 // Not care about version at present.
1152 //WMM Information Element
1153 //printk(KERN_WARNING "wmm info&param updated: %x\n", info_element->data[6]);
1154 network->wmm_info = info_element->data[6];
1155 //WMM Parameter Element
1156 memcpy(network->wmm_param, (u8 *)(info_element->data + 8),(info_element->len - 8));
1157 network->QoS_Enable = 1;
1158 }
1159 break;
1160
1161 case MFIE_TYPE_RSN:
1162 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n",
1163 info_element->len);
1164 network->rsn_ie_len = min(info_element->len + 2,
1165 MAX_WPA_IE_LEN);
1166 memcpy(network->rsn_ie, info_element,
1167 network->rsn_ie_len);
1168 break;
1169 case MFIE_TYPE_COUNTRY:
1170 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
1171 info_element->len);
1172 // printk("=====>Receive <%s> Country IE\n",network->ssid);
1173 ieee80211_extract_country_ie(ieee, info_element, network, beacon->header.addr2);
1174 break;
1175 default:
1176 IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
1177 info_element->id);
1178 break;
1179 }
1180
1181 left -= sizeof(struct ieee80211_info_element_hdr) +
1182 info_element->len;
1183 info_element = (struct ieee80211_info_element *)
1184 &info_element->data[info_element->len];
1185 }
1186 //by amy 080312
1187 network->HighestOperaRate = hOpRate;
1188 //by amy 080312
1189 network->mode = 0;
1190 if (stats->freq == IEEE80211_52GHZ_BAND)
1191 network->mode = IEEE_A;
1192 else {
1193 if (network->flags & NETWORK_HAS_OFDM)
1194 network->mode |= IEEE_G;
1195 if (network->flags & NETWORK_HAS_CCK)
1196 network->mode |= IEEE_B;
1197 }
1198
1199 if (network->mode == 0) {
1200 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1201 "network.\n",
1202 escape_essid(network->ssid,
1203 network->ssid_len),
1204 MAC_ARG(network->bssid));
1205 return 1;
1206 }
1207
1208 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1209 network->flags |= NETWORK_EMPTY_ESSID;
1210
1211 stats->signal = ieee80211_TranslateToDbm(stats->signalstrength);
1212 //stats->noise = stats->signal - stats->noise;
1213 stats->noise = ieee80211_TranslateToDbm(100 - stats->signalstrength) - 25;
1214 memcpy(&network->stats, stats, sizeof(network->stats));
1215
1216 return 0;
1217 }
1218
1219 static inline int is_same_network(struct ieee80211_network *src,
1220 struct ieee80211_network *dst,
1221 struct ieee80211_device * ieee)
1222 {
1223 /* A network is only a duplicate if the channel, BSSID, ESSID
1224 * and the capability field (in particular IBSS and BSS) all match.
1225 * We treat all <hidden> with the same BSSID and channel
1226 * as one network */
1227 return (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
1228 //((src->ssid_len == dst->ssid_len) &&
1229 (src->channel == dst->channel) &&
1230 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
1231 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
1232 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
1233 ((src->capability & WLAN_CAPABILITY_IBSS) ==
1234 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
1235 ((src->capability & WLAN_CAPABILITY_BSS) ==
1236 (dst->capability & WLAN_CAPABILITY_BSS)));
1237 }
1238
1239 inline void update_network(struct ieee80211_network *dst,
1240 struct ieee80211_network *src)
1241 {
1242 unsigned char quality = src->stats.signalstrength;
1243 unsigned char signal = 0;
1244 unsigned char noise = 0;
1245 if(dst->stats.signalstrength > 0) {
1246 quality = (dst->stats.signalstrength * 5 + src->stats.signalstrength + 5)/6;
1247 }
1248 signal = ieee80211_TranslateToDbm(quality);
1249 //noise = signal - src->stats.noise;
1250 if(dst->stats.noise > 0)
1251 noise = (dst->stats.noise * 5 + src->stats.noise)/6;
1252 //if(strcmp(dst->ssid, "linksys_lzm000") == 0)
1253 // printk("ssid:%s, quality:%d, signal:%d\n", dst->ssid, quality, signal);
1254 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
1255 dst->stats.signalstrength = quality;
1256 dst->stats.signal = signal;
1257 // printk("==================>stats.signal is %d\n",dst->stats.signal);
1258 dst->stats.noise = noise;
1259
1260
1261 dst->capability = src->capability;
1262 memcpy(dst->rates, src->rates, src->rates_len);
1263 dst->rates_len = src->rates_len;
1264 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1265 dst->rates_ex_len = src->rates_ex_len;
1266 dst->HighestOperaRate= src->HighestOperaRate;
1267 //printk("==========>in %s: src->ssid is %s,chan is %d\n",__func__,src->ssid,src->channel);
1268
1269 //YJ,add,080819,for hidden ap
1270 if(src->ssid_len > 0)
1271 {
1272 //if(src->ssid_len == 13)
1273 // printk("=====================>>>>>>>> Dst ssid: %s Src ssid: %s\n", dst->ssid, src->ssid);
1274 memset(dst->ssid, 0, dst->ssid_len);
1275 dst->ssid_len = src->ssid_len;
1276 memcpy(dst->ssid, src->ssid, src->ssid_len);
1277 }
1278 //YJ,add,080819,for hidden ap,end
1279
1280 dst->channel = src->channel;
1281 dst->mode = src->mode;
1282 dst->flags = src->flags;
1283 dst->time_stamp[0] = src->time_stamp[0];
1284 dst->time_stamp[1] = src->time_stamp[1];
1285
1286 dst->beacon_interval = src->beacon_interval;
1287 dst->listen_interval = src->listen_interval;
1288 dst->atim_window = src->atim_window;
1289 dst->dtim_period = src->dtim_period;
1290 dst->dtim_data = src->dtim_data;
1291 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
1292 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
1293 // printk("update:%s, dtim_period:%x, dtim_data:%x\n", src->ssid, src->dtim_period, src->dtim_data);
1294 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1295 dst->wpa_ie_len = src->wpa_ie_len;
1296 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1297 dst->rsn_ie_len = src->rsn_ie_len;
1298
1299 dst->last_scanned = jiffies;
1300 /* dst->last_associate is not overwritten */
1301 // disable QoS process now, added by David 2006/7/25
1302 #if 1
1303 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
1304 /*
1305 if((dst->wmm_info^src->wmm_info)&0x0f) {//Param Set Count change, update Parameter
1306 memcpy(dst->wmm_param, src->wmm_param, IEEE80211_AC_PRAM_LEN);
1307 }
1308 */
1309 if(src->wmm_param[0].ac_aci_acm_aifsn|| \
1310 src->wmm_param[1].ac_aci_acm_aifsn|| \
1311 src->wmm_param[2].ac_aci_acm_aifsn|| \
1312 src->wmm_param[3].ac_aci_acm_aifsn) {
1313 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
1314 }
1315 dst->QoS_Enable = src->QoS_Enable;
1316 #else
1317 dst->QoS_Enable = 1;//for Rtl8187 simulation
1318 #endif
1319 dst->SignalStrength = src->SignalStrength;
1320 dst->Turbo_Enable = src->Turbo_Enable;
1321 dst->CountryIeLen = src->CountryIeLen;
1322 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
1323 }
1324
1325
1326 inline void ieee80211_process_probe_response(
1327 struct ieee80211_device *ieee,
1328 struct ieee80211_probe_response *beacon,
1329 struct ieee80211_rx_stats *stats)
1330 {
1331 struct ieee80211_network network;
1332 struct ieee80211_network *target;
1333 struct ieee80211_network *oldest = NULL;
1334 #ifdef CONFIG_IEEE80211_DEBUG
1335 struct ieee80211_info_element *info_element = &beacon->info_element;
1336 #endif
1337 unsigned long flags;
1338 short renew;
1339 u8 wmm_info;
1340 u8 is_beacon = (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON)? 1:0; //YJ,add,080819,for hidden ap
1341
1342 memset(&network, 0, sizeof(struct ieee80211_network));
1343
1344 IEEE80211_DEBUG_SCAN(
1345 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1346 escape_essid(info_element->data, info_element->len),
1347 MAC_ARG(beacon->header.addr3),
1348 (beacon->capability & (1<<0xf)) ? '1' : '0',
1349 (beacon->capability & (1<<0xe)) ? '1' : '0',
1350 (beacon->capability & (1<<0xd)) ? '1' : '0',
1351 (beacon->capability & (1<<0xc)) ? '1' : '0',
1352 (beacon->capability & (1<<0xb)) ? '1' : '0',
1353 (beacon->capability & (1<<0xa)) ? '1' : '0',
1354 (beacon->capability & (1<<0x9)) ? '1' : '0',
1355 (beacon->capability & (1<<0x8)) ? '1' : '0',
1356 (beacon->capability & (1<<0x7)) ? '1' : '0',
1357 (beacon->capability & (1<<0x6)) ? '1' : '0',
1358 (beacon->capability & (1<<0x5)) ? '1' : '0',
1359 (beacon->capability & (1<<0x4)) ? '1' : '0',
1360 (beacon->capability & (1<<0x3)) ? '1' : '0',
1361 (beacon->capability & (1<<0x2)) ? '1' : '0',
1362 (beacon->capability & (1<<0x1)) ? '1' : '0',
1363 (beacon->capability & (1<<0x0)) ? '1' : '0');
1364
1365 if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1366 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1367 escape_essid(info_element->data,
1368 info_element->len),
1369 MAC_ARG(beacon->header.addr3),
1370 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1371 IEEE80211_STYPE_PROBE_RESP ?
1372 "PROBE RESPONSE" : "BEACON");
1373 return;
1374 }
1375
1376 // For Asus EeePc request,
1377 // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
1378 // wireless adapter should follow the country code.
1379 // (2) If there is no any country code in beacon,
1380 // then wireless adapter should do active scan from ch1~11 and
1381 // passive scan from ch12~14
1382 if(ieee->bGlobalDomain)
1383 {
1384 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP)
1385 {
1386 // Case 1: Country code
1387 if(IS_COUNTRY_IE_VALID(ieee) )
1388 {
1389 if( !IsLegalChannel(ieee, network.channel) )
1390 {
1391 printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
1392 return;
1393 }
1394 }
1395 // Case 2: No any country code.
1396 else
1397 {
1398 // Filter over channel ch12~14
1399 if(network.channel > 11)
1400 {
1401 printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
1402 return;
1403 }
1404 }
1405 }
1406 else
1407 {
1408 // Case 1: Country code
1409 if(IS_COUNTRY_IE_VALID(ieee) )
1410 {
1411 if( !IsLegalChannel(ieee, network.channel) )
1412 {
1413 printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel);
1414 return;
1415 }
1416 }
1417 // Case 2: No any country code.
1418 else
1419 {
1420 // Filter over channel ch12~14
1421 if(network.channel > 14)
1422 {
1423 printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel);
1424 return;
1425 }
1426 }
1427 }
1428 }
1429 /* The network parsed correctly -- so now we scan our known networks
1430 * to see if we can find it in our list.
1431 *
1432 * NOTE: This search is definitely not optimized. Once its doing
1433 * the "right thing" we'll optimize it for efficiency if
1434 * necessary */
1435
1436 /* Search for this entry in the list and update it if it is
1437 * already there. */
1438
1439 spin_lock_irqsave(&ieee->lock, flags);
1440
1441 if(is_same_network(&ieee->current_network, &network, ieee)) {
1442 wmm_info = ieee->current_network.wmm_info;
1443 //YJ,add,080819,for hidden ap
1444 if(is_beacon == 0)
1445 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
1446 else if(ieee->state == IEEE80211_LINKED)
1447 ieee->NumRxBcnInPeriod++;
1448 //YJ,add,080819,for hidden ap,end
1449 //printk("====>network.ssid=%s cur_ssid=%s\n", network.ssid, ieee->current_network.ssid);
1450 update_network(&ieee->current_network, &network);
1451 }
1452
1453 list_for_each_entry(target, &ieee->network_list, list) {
1454 if (is_same_network(target, &network, ieee))
1455 break;
1456 if ((oldest == NULL) ||
1457 (target->last_scanned < oldest->last_scanned))
1458 oldest = target;
1459 }
1460
1461 /* If we didn't find a match, then get a new network slot to initialize
1462 * with this beacon's information */
1463 if (&target->list == &ieee->network_list) {
1464 if (list_empty(&ieee->network_free_list)) {
1465 /* If there are no more slots, expire the oldest */
1466 list_del(&oldest->list);
1467 target = oldest;
1468 IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1469 "network list.\n",
1470 escape_essid(target->ssid,
1471 target->ssid_len),
1472 MAC_ARG(target->bssid));
1473 } else {
1474 /* Otherwise just pull from the free list */
1475 target = list_entry(ieee->network_free_list.next,
1476 struct ieee80211_network, list);
1477 list_del(ieee->network_free_list.next);
1478 }
1479
1480
1481 #ifdef CONFIG_IEEE80211_DEBUG
1482 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1483 escape_essid(network.ssid,
1484 network.ssid_len),
1485 MAC_ARG(network.bssid),
1486 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1487 IEEE80211_STYPE_PROBE_RESP ?
1488 "PROBE RESPONSE" : "BEACON");
1489 #endif
1490
1491 memcpy(target, &network, sizeof(*target));
1492 list_add_tail(&target->list, &ieee->network_list);
1493 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
1494 ieee80211_softmac_new_net(ieee,&network);
1495 } else {
1496 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1497 escape_essid(target->ssid,
1498 target->ssid_len),
1499 MAC_ARG(target->bssid),
1500 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1501 IEEE80211_STYPE_PROBE_RESP ?
1502 "PROBE RESPONSE" : "BEACON");
1503
1504 /* we have an entry and we are going to update it. But this entry may
1505 * be already expired. In this case we do the same as we found a new
1506 * net and call the new_net handler
1507 */
1508 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
1509 //YJ,add,080819,for hidden ap
1510 if(is_beacon == 0)
1511 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
1512 //if(strncmp(network.ssid, "linksys-c",9) == 0)
1513 // printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
1514 if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
1515 && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
1516 ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
1517 renew = 1;
1518 //YJ,add,080819,for hidden ap,end
1519 update_network(target, &network);
1520 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
1521 ieee80211_softmac_new_net(ieee,&network);
1522 }
1523
1524 spin_unlock_irqrestore(&ieee->lock, flags);
1525 }
1526
1527 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1528 struct ieee80211_hdr_4addr *header,
1529 struct ieee80211_rx_stats *stats)
1530 {
1531 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
1532
1533 case IEEE80211_STYPE_BEACON:
1534 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1535 WLAN_FC_GET_STYPE(header->frame_ctl));
1536 IEEE80211_DEBUG_SCAN("Beacon\n");
1537 ieee80211_process_probe_response(
1538 ieee, (struct ieee80211_probe_response *)header, stats);
1539 break;
1540
1541 case IEEE80211_STYPE_PROBE_RESP:
1542 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1543 WLAN_FC_GET_STYPE(header->frame_ctl));
1544 IEEE80211_DEBUG_SCAN("Probe response\n");
1545 ieee80211_process_probe_response(
1546 ieee, (struct ieee80211_probe_response *)header, stats);
1547 break;
1548 }
1549 }
kernel-based virtual machine