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 #ifdef ENABLE_DOT11D
48 #include "dot11d.h"
49 #endif
50 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
51 struct sk_buff *skb,
52 struct ieee80211_rx_stats *rx_stats)
53 {
54 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
55 u16 fc = le16_to_cpu(hdr->frame_ctl);
56
57 skb->dev = ieee->dev;
58 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
59 skb_reset_mac_header(skb);
60 #else
61 skb->mac.raw = skb->data;
62 #endif
63 skb_pull(skb, ieee80211_get_hdrlen(fc));
64 skb->pkt_type = PACKET_OTHERHOST;
65 skb->protocol = __constant_htons(ETH_P_80211_RAW);
66 memset(skb->cb, 0, sizeof(skb->cb));
67 netif_rx(skb);
68 }
69
70
71 /* Called only as a tasklet (software IRQ) */
72 static struct ieee80211_frag_entry *
73 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
74 unsigned int frag, u8 tid,u8 *src, u8 *dst)
75 {
76 struct ieee80211_frag_entry *entry;
77 int i;
78
79 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
80 entry = &ieee->frag_cache[tid][i];
81 if (entry->skb != NULL &&
82 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
83 IEEE80211_DEBUG_FRAG(
84 "expiring fragment cache entry "
85 "seq=%u last_frag=%u\n",
86 entry->seq, entry->last_frag);
87 dev_kfree_skb_any(entry->skb);
88 entry->skb = NULL;
89 }
90
91 if (entry->skb != NULL && entry->seq == seq &&
92 (entry->last_frag + 1 == frag || frag == -1) &&
93 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
94 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
95 return entry;
96 }
97
98 return NULL;
99 }
100
101 /* Called only as a tasklet (software IRQ) */
102 static struct sk_buff *
103 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
104 struct ieee80211_hdr *hdr)
105 {
106 struct sk_buff *skb = NULL;
107 u16 fc = le16_to_cpu(hdr->frame_ctl);
108 u16 sc = le16_to_cpu(hdr->seq_ctl);
109 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
110 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
111 struct ieee80211_frag_entry *entry;
112 struct ieee80211_hdr_3addr_QOS *hdr_3addr_QoS;
113 struct ieee80211_hdr_QOS *hdr_4addr_QoS;
114 u8 tid;
115
116 #ifdef _RTL8187_EXT_PATCH_
117 if(ieee->iw_mode == ieee->iw_ext_mode)
118 {
119 tid = (hdr->addr2[ETH_ALEN-2] ^ hdr->addr2[ETH_ALEN-1]) & IEEE80211_QOS_TID;
120 }
121 else
122 #endif
123 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
124 hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr;
125 tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
126 tid = UP2AC(tid);
127 tid ++;
128 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
129 hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS *)hdr;
130 tid = le16_to_cpu(hdr_3addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
131 tid = UP2AC(tid);
132 tid ++;
133 } else {
134 tid = 0;
135 }
136
137 if (frag == 0) {
138 /* Reserve enough space to fit maximum frame length */
139 skb = dev_alloc_skb(ieee->dev->mtu +
140 sizeof(struct ieee80211_hdr) +
141 8 /* LLC */ +
142 2 /* alignment */ +
143 8 /* WEP */ +
144 ETH_ALEN /* WDS */ +
145 (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
146 if (skb == NULL)
147 return NULL;
148
149 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
150 ieee->frag_next_idx[tid]++;
151 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
152 ieee->frag_next_idx[tid] = 0;
153
154 if (entry->skb != NULL)
155 dev_kfree_skb_any(entry->skb);
156
157 entry->first_frag_time = jiffies;
158 entry->seq = seq;
159 entry->last_frag = frag;
160 entry->skb = skb;
161 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
162 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
163 } else {
164 /* received a fragment of a frame for which the head fragment
165 * should have already been received */
166 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
167 hdr->addr1);
168 if (entry != NULL) {
169 entry->last_frag = frag;
170 skb = entry->skb;
171 }
172 }
173
174 return skb;
175 }
176
177
178 /* Called only as a tasklet (software IRQ) */
179 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
180 struct ieee80211_hdr *hdr)
181 {
182 u16 fc = le16_to_cpu(hdr->frame_ctl);
183 u16 sc = le16_to_cpu(hdr->seq_ctl);
184 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
185 struct ieee80211_frag_entry *entry;
186 struct ieee80211_hdr_3addr_QOS *hdr_3addr_QoS;
187 struct ieee80211_hdr_QOS *hdr_4addr_QoS;
188 u8 tid;
189
190 #ifdef _RTL8187_EXT_PATCH_
191 if(ieee->iw_mode == ieee->iw_ext_mode)
192 {
193 tid = (hdr->addr2[ETH_ALEN-2] ^ hdr->addr2[ETH_ALEN-1]) & IEEE80211_QOS_TID;
194 }
195 else
196 #endif
197 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
198 hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr;
199 tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
200 tid = UP2AC(tid);
201 tid ++;
202 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
203 hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS *)hdr;
204 tid = le16_to_cpu(hdr_3addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
205 tid = UP2AC(tid);
206 tid ++;
207 } else {
208 tid = 0;
209 }
210
211 entry = ieee80211_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
212 hdr->addr1);
213
214 if (entry == NULL) {
215 IEEE80211_DEBUG_FRAG(
216 "could not invalidate fragment cache "
217 "entry (seq=%u)\n", seq);
218 return -1;
219 }
220
221 entry->skb = NULL;
222 return 0;
223 }
224
225
226
227 /* ieee80211_rx_frame_mgtmt
228 *
229 * Responsible for handling management control frames
230 *
231 * Called by ieee80211_rx */
232 static inline int
233 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
234 struct ieee80211_rx_stats *rx_stats, u16 type,
235 u16 stype)
236 {
237 struct ieee80211_hdr *hdr;
238
239 // cheat the the hdr type
240 hdr = (struct ieee80211_hdr *)skb->data;
241
242 /* On the struct stats definition there is written that
243 * this is not mandatory.... but seems that the probe
244 * response parser uses it
245 */
246 rx_stats->len = skb->len;
247 ieee80211_rx_mgt(ieee,(struct ieee80211_hdr *)skb->data,rx_stats);
248
249 if((ieee->state == IEEE80211_LINKED)&&(memcmp(hdr->addr3,ieee->current_network.bssid,ETH_ALEN))) {
250 dev_kfree_skb_any(skb);
251 return 0;
252 }
253
254 ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
255
256 dev_kfree_skb_any(skb);
257
258 return 0;
259
260 #ifdef NOT_YET
261 if (ieee->iw_mode == IW_MODE_MASTER) {
262 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
263 ieee->dev->name);
264 return 0;
265 /*
266 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr *)
267 skb->data);*/
268 }
269
270 if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) {
271 if (stype == WLAN_FC_STYPE_BEACON &&
272 ieee->iw_mode == IW_MODE_MASTER) {
273 struct sk_buff *skb2;
274 /* Process beacon frames also in kernel driver to
275 * update STA(AP) table statistics */
276 skb2 = skb_clone(skb, GFP_ATOMIC);
277 if (skb2)
278 hostap_rx(skb2->dev, skb2, rx_stats);
279 }
280
281 /* send management frames to the user space daemon for
282 * processing */
283 ieee->apdevstats.rx_packets++;
284 ieee->apdevstats.rx_bytes += skb->len;
285 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
286 return 0;
287 }
288
289 if (ieee->iw_mode == IW_MODE_MASTER) {
290 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
291 printk(KERN_DEBUG "%s: unknown management frame "
292 "(type=0x%02x, stype=0x%02x) dropped\n",
293 skb->dev->name, type, stype);
294 return -1;
295 }
296
297 hostap_rx(skb->dev, skb, rx_stats);
298 return 0;
299 }
300
301 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
302 "received in non-Host AP mode\n", skb->dev->name);
303 return -1;
304 #endif
305 }
306
307
308
309 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
310 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
311 static unsigned char rfc1042_header[] =
312 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
313 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
314 static unsigned char bridge_tunnel_header[] =
315 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
316 /* No encapsulation header if EtherType < 0x600 (=length) */
317
318 /* Called by ieee80211_rx_frame_decrypt */
319 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
320 struct sk_buff *skb, size_t hdrlen)
321 {
322 struct net_device *dev = ieee->dev;
323 u16 fc, ethertype;
324 struct ieee80211_hdr *hdr;
325 u8 *pos;
326
327 if (skb->len < 24)
328 return 0;
329
330 hdr = (struct ieee80211_hdr *) skb->data;
331 fc = le16_to_cpu(hdr->frame_ctl);
332
333 /* check that the frame is unicast frame to us */
334 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
335 IEEE80211_FCTL_TODS &&
336 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
337 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
338 /* ToDS frame with own addr BSSID and DA */
339 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
340 IEEE80211_FCTL_FROMDS &&
341 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
342 /* FromDS frame with own addr as DA */
343 } else
344 return 0;
345
346 if (skb->len < 24 + 8)
347 return 0;
348
349 /* check for port access entity Ethernet type */
350 // pos = skb->data + 24;
351 pos = skb->data + hdrlen;
352 ethertype = (pos[6] << 8) | pos[7];
353 if (ethertype == ETH_P_PAE)
354 return 1;
355
356 return 0;
357 }
358
359 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
360 static inline int
361 ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
362 struct ieee80211_crypt_data *crypt)
363 {
364 struct ieee80211_hdr *hdr;
365 int res, hdrlen;
366
367 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
368 return 0;
369
370 hdr = (struct ieee80211_hdr *) skb->data;
371 #ifdef _RTL8187_EXT_PATCH_
372 if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_rx_frame_get_hdrlen))
373 {
374 hdrlen = ieee->ext_patch_ieee80211_rx_frame_get_hdrlen(ieee, skb);
375 }
376 else
377 #endif
378 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
379
380 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
381 if (ieee->tkip_countermeasures &&
382 strcmp(crypt->ops->name, "TKIP") == 0) {
383 if (net_ratelimit()) {
384 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
385 "received packet from " MAC_FMT "\n",
386 ieee->dev->name, MAC_ARG(hdr->addr2));
387 }
388 return -1;
389 }
390 #endif
391
392 atomic_inc(&crypt->refcnt);
393 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
394 atomic_dec(&crypt->refcnt);
395 if (res < 0) {
396 IEEE80211_DEBUG_DROP(
397 "decryption failed (SA=" MAC_FMT
398 ") res=%d\n", MAC_ARG(hdr->addr2), res);
399 if (res == -2)
400 IEEE80211_DEBUG_DROP("Decryption failed ICV "
401 "mismatch (key %d)\n",
402 skb->data[hdrlen + 3] >> 6);
403 ieee->ieee_stats.rx_discards_undecryptable++;
404 return -1;
405 }
406
407 return res;
408 }
409
410
411 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
412 static inline int
413 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
414 int keyidx, struct ieee80211_crypt_data *crypt)
415 {
416 struct ieee80211_hdr *hdr;
417 int res, hdrlen;
418
419 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
420 return 0;
421
422 hdr = (struct ieee80211_hdr *) skb->data;
423 #ifdef _RTL8187_EXT_PATCH_
424 if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_rx_frame_get_hdrlen))
425 {
426 hdrlen = ieee->ext_patch_ieee80211_rx_frame_get_hdrlen(ieee, skb);
427 }
428 else
429 #endif
430 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
431
432 atomic_inc(&crypt->refcnt);
433 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
434 atomic_dec(&crypt->refcnt);
435 if (res < 0) {
436 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
437 " (SA=" MAC_FMT " keyidx=%d)\n",
438 ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
439 return -1;
440 }
441
442 return 0;
443 }
444
445
446 /* this function is stolen from ipw2200 driver*/
447 #define IEEE_PACKET_RETRY_TIME (5*HZ)
448 static int is_duplicate_packet(struct ieee80211_device *ieee,
449 struct ieee80211_hdr *header)
450 {
451 u16 fc = le16_to_cpu(header->frame_ctl);
452 u16 sc = le16_to_cpu(header->seq_ctl);
453 u16 seq = WLAN_GET_SEQ_SEQ(sc);
454 u16 frag = WLAN_GET_SEQ_FRAG(sc);
455 u16 *last_seq, *last_frag;
456 unsigned long *last_time;
457 struct ieee80211_hdr_3addr_QOS *hdr_3addr_QoS;
458 struct ieee80211_hdr_QOS *hdr_4addr_QoS;
459 u8 tid;
460
461 #ifdef _RTL8187_EXT_PATCH_
462 if(ieee->iw_mode == ieee->iw_ext_mode)
463 {
464 tid = (header->addr2[ETH_ALEN-2] ^ header->addr2[ETH_ALEN-1]) & IEEE80211_QOS_TID;
465 }
466 else
467 #endif
468 //TO2DS and QoS
469 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
470 hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)header;
471 tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
472 tid = UP2AC(tid);
473 tid ++;
474 } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
475 hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS*)header;
476 tid = le16_to_cpu(hdr_3addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
477 tid = UP2AC(tid);
478 tid ++;
479 } else { // no QoS
480 tid = 0;
481 }
482 switch (ieee->iw_mode) {
483 case IW_MODE_ADHOC:
484 {
485 struct list_head *p;
486 struct ieee_ibss_seq *entry = NULL;
487 u8 *mac = header->addr2;
488 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
489 //for (pos = (head)->next; pos != (head); pos = pos->next)
490 __list_for_each(p, &ieee->ibss_mac_hash[index]) {
491 entry = list_entry(p, struct ieee_ibss_seq, list);
492 if (!memcmp(entry->mac, mac, ETH_ALEN))
493 break;
494 }
495 // if (memcmp(entry->mac, mac, ETH_ALEN)){
496 if (p == &ieee->ibss_mac_hash[index]) {
497 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
498 if (!entry) {
499 printk(KERN_WARNING "Cannot malloc new mac entry\n");
500 return 0;
501 }
502 memcpy(entry->mac, mac, ETH_ALEN);
503 entry->seq_num[tid] = seq;
504 entry->frag_num[tid] = frag;
505 entry->packet_time[tid] = jiffies;
506 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
507 return 0;
508 }
509 last_seq = &entry->seq_num[tid];
510 last_frag = &entry->frag_num[tid];
511 last_time = &entry->packet_time[tid];
512 break;
513 }
514
515 case IW_MODE_INFRA:
516 last_seq = &ieee->last_rxseq_num[tid];
517 last_frag = &ieee->last_rxfrag_num[tid];
518 last_time = &ieee->last_packet_time[tid];
519
520 break;
521 default:
522 #ifdef _RTL8187_EXT_PATCH_
523 if(ieee->iw_mode == ieee->iw_ext_mode)
524 {
525 last_seq = &ieee->last_rxseq_num[tid];
526 last_frag = &ieee->last_rxfrag_num[tid];
527 last_time = &ieee->last_packet_time[tid];
528 break;
529 }
530 else
531 #endif
532 return 0;
533 }
534
535 // if(tid != 0) {
536 // printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
537 // }
538 if ((*last_seq == seq) &&
539 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
540 if (*last_frag == frag){
541 //printk(KERN_WARNING "[1] go drop!\n");
542 goto drop;
543
544 }
545 if (*last_frag + 1 != frag)
546 /* out-of-order fragment */
547 //printk(KERN_WARNING "[2] go drop!\n");
548 goto drop;
549 } else
550 *last_seq = seq;
551
552 *last_frag = frag;
553 *last_time = jiffies;
554 return 0;
555
556 drop:
557 // BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
558 // printk("DUP\n");
559
560 return 1;
561 }
562
563
564 /* All received frames are sent to this function. @skb contains the frame in
565 * IEEE 802.11 format, i.e., in the format it was sent over air.
566 * This function is called only as a tasklet (software IRQ). */
567 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
568 struct ieee80211_rx_stats *rx_stats)
569 {
570 struct net_device *dev = ieee->dev;
571 //struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
572 struct ieee80211_hdr *hdr;
573 //struct ieee80211_hdr_3addr_QOS *hdr;
574
575 size_t hdrlen;
576 u16 fc, type, stype, sc;
577 struct net_device_stats *stats;
578 unsigned int frag;
579 u8 *payload;
580 u16 ethertype;
581 #ifdef NOT_YET
582 struct net_device *wds = NULL;
583 struct sk_buff *skb2 = NULL;
584 struct net_device *wds = NULL;
585 int frame_authorized = 0;
586 int from_assoc_ap = 0;
587 void *sta = NULL;
588 #endif
589 // u16 QOS_ctl = 0;
590 u8 dst[ETH_ALEN];
591 u8 src[ETH_ALEN];
592 u8 bssid[ETH_ALEN];
593 struct ieee80211_crypt_data *crypt = NULL;
594 int keyidx = 0;
595
596 //Added for mesh by Lawrence.
597 #ifdef _RTL8187_EXT_PATCH_
598 u8 status;
599 u32 flags;
600 #endif
601 // cheat the the hdr type
602 hdr = (struct ieee80211_hdr *)skb->data;
603 stats = &ieee->stats;
604
605 if (skb->len < 10) {
606 printk(KERN_INFO "%s: SKB length < 10\n",
607 dev->name);
608 goto rx_dropped;
609 }
610
611 fc = le16_to_cpu(hdr->frame_ctl);
612 type = WLAN_FC_GET_TYPE(fc);
613 stype = WLAN_FC_GET_STYPE(fc);
614 sc = le16_to_cpu(hdr->seq_ctl);
615
616 frag = WLAN_GET_SEQ_FRAG(sc);
617
618 //YJ,add,080828,for keep alive
619 if((fc & IEEE80211_FCTL_TODS) != IEEE80211_FCTL_TODS)
620 {
621 if(!memcmp(hdr->addr1,dev->dev_addr, ETH_ALEN))
622 {
623 ieee->NumRxUnicast++;
624 }
625 }
626 else
627 {
628 if(!memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN))
629 {
630 ieee->NumRxUnicast++;
631 }
632 }
633 //YJ,add,080828,for keep alive,end
634
635 #ifdef _RTL8187_EXT_PATCH_
636 if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_rx_frame_get_hdrlen))
637 {
638 hdrlen = ieee->ext_patch_ieee80211_rx_frame_get_hdrlen(ieee, skb);
639 if(skb->len < hdrlen)
640 goto rx_dropped;
641 }
642 else
643 #endif
644 hdrlen = ieee80211_get_hdrlen(fc);
645
646 #ifdef NOT_YET
647 #if WIRELESS_EXT > 15
648 /* Put this code here so that we avoid duplicating it in all
649 * Rx paths. - Jean II */
650 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
651 /* If spy monitoring on */
652 if (iface->spy_data.spy_number > 0) {
653 struct iw_quality wstats;
654 wstats.level = rx_stats->signal;
655 wstats.noise = rx_stats->noise;
656 wstats.updated = 6; /* No qual value */
657 /* Update spy records */
658 wireless_spy_update(dev, hdr->addr2, &wstats);
659 }
660 #endif /* IW_WIRELESS_SPY */
661 #endif /* WIRELESS_EXT > 15 */
662 hostap_update_rx_stats(local->ap, hdr, rx_stats);
663 #endif
664
665 #if WIRELESS_EXT > 15
666 if (ieee->iw_mode == IW_MODE_MONITOR) {
667 ieee80211_monitor_rx(ieee, skb, rx_stats);
668 stats->rx_packets++;
669 stats->rx_bytes += skb->len;
670 return 1;
671 }
672 #endif
673 if (ieee->host_decrypt) {
674 int idx = 0;
675 if (skb->len >= hdrlen + 3)
676 idx = skb->data[hdrlen + 3] >> 6;
677 crypt = ieee->crypt[idx];
678 #ifdef NOT_YET
679 sta = NULL;
680
681 /* Use station specific key to override default keys if the
682 * receiver address is a unicast address ("individual RA"). If
683 * bcrx_sta_key parameter is set, station specific key is used
684 * even with broad/multicast targets (this is against IEEE
685 * 802.11, but makes it easier to use different keys with
686 * stations that do not support WEP key mapping). */
687
688 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
689 (void) hostap_handle_sta_crypto(local, hdr, &crypt,
690 &sta);
691 #endif
692
693 /* allow NULL decrypt to indicate an station specific override
694 * for default encryption */
695 if (crypt && (crypt->ops == NULL ||
696 crypt->ops->decrypt_mpdu == NULL))
697 crypt = NULL;
698
699 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
700 /* This seems to be triggered by some (multicast?)
701 * frames from other than current BSS, so just drop the
702 * frames silently instead of filling system log with
703 * these reports. */
704 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
705 " (SA=" MAC_FMT ")\n",
706 MAC_ARG(hdr->addr2));
707 ieee->ieee_stats.rx_discards_undecryptable++;
708 goto rx_dropped;
709 }
710 }
711
712 if (skb->len < IEEE80211_DATA_HDR3_LEN)
713 goto rx_dropped;
714
715 #ifdef _RTL8187_EXT_PATCH_
716 if( ieee->iw_mode == ieee->iw_ext_mode && ieee->ext_patch_ieee80211_rx_mgt_update_expire )
717 ieee->ext_patch_ieee80211_rx_mgt_update_expire( ieee, skb );
718 #endif
719
720 // if QoS enabled, should check the sequence for each of the AC
721 if (is_duplicate_packet(ieee, hdr))
722 goto rx_dropped;
723
724
725 if (type == IEEE80211_FTYPE_MGMT) {
726
727 #if 0
728 if ( stype == IEEE80211_STYPE_AUTH &&
729 fc & IEEE80211_FCTL_WEP && ieee->host_decrypt &&
730 (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0)
731 {
732 printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
733 "from " MAC_FMT "\n", dev->name,
734 MAC_ARG(hdr->addr2));
735 /* TODO: could inform hostapd about this so that it
736 * could send auth failure report */
737 goto rx_dropped;
738 }
739 #endif
740
741
742 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
743 goto rx_dropped;
744 else
745 goto rx_exit;
746 }
747 #ifdef _RTL8187_EXT_PATCH_
748 if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_rx_on_rx)
749 {
750 if(ieee->ext_patch_ieee80211_rx_on_rx(ieee, skb, rx_stats, type, stype)==0)
751 {
752 goto rx_exit;
753 }
754 }
755 #endif
756
757 /* Data frame - extract src/dst addresses */
758 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
759 case IEEE80211_FCTL_FROMDS:
760 memcpy(dst, hdr->addr1, ETH_ALEN);
761 memcpy(src, hdr->addr3, ETH_ALEN);
762 memcpy(bssid,hdr->addr2,ETH_ALEN);
763 break;
764 case IEEE80211_FCTL_TODS:
765 memcpy(dst, hdr->addr3, ETH_ALEN);
766 memcpy(src, hdr->addr2, ETH_ALEN);
767 memcpy(bssid,hdr->addr1,ETH_ALEN);
768 break;
769 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
770 if (skb->len < IEEE80211_DATA_HDR4_LEN)
771 goto rx_dropped;
772 memcpy(dst, hdr->addr3, ETH_ALEN);
773 memcpy(src, hdr->addr4, ETH_ALEN);
774 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
775 break;
776 case 0:
777 memcpy(dst, hdr->addr1, ETH_ALEN);
778 memcpy(src, hdr->addr2, ETH_ALEN);
779 memcpy(bssid,hdr->addr3,ETH_ALEN);
780 break;
781 }
782
783 #ifdef NOT_YET
784 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
785 goto rx_dropped;
786 if (wds) {
787 skb->dev = dev = wds;
788 stats = hostap_get_stats(dev);
789 }
790
791 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
792 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
793 ieee->stadev &&
794 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
795 /* Frame from BSSID of the AP for which we are a client */
796 skb->dev = dev = ieee->stadev;
797 stats = hostap_get_stats(dev);
798 from_assoc_ap = 1;
799 }
800 #endif
801
802 dev->last_rx = jiffies;
803
804 #ifdef NOT_YET
805 if ((ieee->iw_mode == IW_MODE_MASTER ||
806 ieee->iw_mode == IW_MODE_REPEAT) &&
807 !from_assoc_ap) {
808 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
809 wds != NULL)) {
810 case AP_RX_CONTINUE_NOT_AUTHORIZED:
811 frame_authorized = 0;
812 break;
813 case AP_RX_CONTINUE:
814 frame_authorized = 1;
815 break;
816 case AP_RX_DROP:
817 goto rx_dropped;
818 case AP_RX_EXIT:
819 goto rx_exit;
820 }
821 }
822 #endif
823
824 #ifdef _RTL8187_EXT_PATCH_
825 if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_rx_is_valid_framectl)
826 {
827 if(ieee->ext_patch_ieee80211_rx_is_valid_framectl(ieee, fc, type, stype)==0)
828 goto rx_dropped;
829 }
830 else
831 #endif
832 /* Nullfunc frames may have PS-bit set, so they must be passed to
833 * hostap_handle_sta_rx() before being dropped here. */
834 if (stype != IEEE80211_STYPE_DATA &&
835 stype != IEEE80211_STYPE_DATA_CFACK &&
836 stype != IEEE80211_STYPE_DATA_CFPOLL &&
837 stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
838 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
839 ) {
840 if (stype != IEEE80211_STYPE_NULLFUNC)
841 IEEE80211_DEBUG_DROP(
842 "RX: dropped data frame "
843 "with no data (type=0x%02x, "
844 "subtype=0x%02x, len=%d)\n",
845 type, stype, skb->len);
846 goto rx_dropped;
847 }
848 if(memcmp(bssid,ieee->current_network.bssid,ETH_ALEN)) {
849 goto rx_dropped;
850 }
851
852 ieee->NumRxDataInPeriod++;
853 ieee->NumRxOkTotal++;
854 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
855
856 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
857 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
858 goto rx_dropped;
859
860 hdr = (struct ieee80211_hdr *) skb->data;
861
862 /* skb: hdr + (possibly fragmented) plaintext payload */
863 // PR: FIXME: hostap has additional conditions in the "if" below:
864 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
865 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
866 int flen;
867 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
868 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
869
870 if (!frag_skb) {
871 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
872 "Rx cannot get skb from fragment "
873 "cache (morefrag=%d seq=%u frag=%u)\n",
874 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
875 WLAN_GET_SEQ_SEQ(sc), frag);
876 goto rx_dropped;
877 }
878 flen = skb->len;
879 if (frag != 0)
880 flen -= hdrlen;
881
882 if (frag_skb->tail + flen > frag_skb->end) {
883 printk(KERN_WARNING "%s: host decrypted and "
884 "reassembled frame did not fit skb\n",
885 dev->name);
886 ieee80211_frag_cache_invalidate(ieee, hdr);
887 goto rx_dropped;
888 }
889
890 if (frag == 0) {
891 /* copy first fragment (including full headers) into
892 * beginning of the fragment cache skb */
893 memcpy(skb_put(frag_skb, flen), skb->data, flen);
894 } else {
895 /* append frame payload to the end of the fragment
896 * cache skb */
897 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
898 flen);
899 }
900 dev_kfree_skb_any(skb);
901 skb = NULL;
902
903 if (fc & IEEE80211_FCTL_MOREFRAGS) {
904 /* more fragments expected - leave the skb in fragment
905 * cache for now; it will be delivered to upper layers
906 * after all fragments have been received */
907 goto rx_exit;
908 }
909
910 /* this was the last fragment and the frame will be
911 * delivered, so remove skb from fragment cache */
912 skb = frag_skb;
913 hdr = (struct ieee80211_hdr *) skb->data;
914 ieee80211_frag_cache_invalidate(ieee, hdr);
915 }
916
917 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
918 * encrypted/authenticated */
919 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
920 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
921 goto rx_dropped;
922
923 hdr = (struct ieee80211_hdr *) skb->data;
924 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
925 if (/*ieee->ieee802_1x &&*/
926 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
927
928 #ifdef CONFIG_IEEE80211_DEBUG
929 /* pass unencrypted EAPOL frames even if encryption is
930 * configured */
931 struct eapol *eap = (struct eapol *)(skb->data +
932 24);
933 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
934 eap_get_type(eap->type));
935 #endif
936 } else {
937 IEEE80211_DEBUG_DROP(
938 "encryption configured, but RX "
939 "frame not encrypted (SA=" MAC_FMT ")\n",
940 MAC_ARG(hdr->addr2));
941 goto rx_dropped;
942 }
943 }
944
945 #ifdef CONFIG_IEEE80211_DEBUG
946 if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
947 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
948 struct eapol *eap = (struct eapol *)(skb->data +
949 24);
950 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
951 eap_get_type(eap->type));
952 }
953 #endif
954
955 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
956 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
957 IEEE80211_DEBUG_DROP(
958 "dropped unencrypted RX data "
959 "frame from " MAC_FMT
960 " (drop_unencrypted=1)\n",
961 MAC_ARG(hdr->addr2));
962 goto rx_dropped;
963 }
964 /*
965 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
966 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
967 }
968 */
969 /* skb: hdr + (possible reassembled) full plaintext payload */
970 payload = skb->data + hdrlen;
971 ethertype = (payload[6] << 8) | payload[7];
972
973 #ifdef NOT_YET
974 /* If IEEE 802.1X is used, check whether the port is authorized to send
975 * the received frame. */
976 if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
977 if (ethertype == ETH_P_PAE) {
978 printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
979 dev->name);
980 if (ieee->hostapd && ieee->apdev) {
981 /* Send IEEE 802.1X frames to the user
982 * space daemon for processing */
983 prism2_rx_80211(ieee->apdev, skb, rx_stats,
984 PRISM2_RX_MGMT);
985 ieee->apdevstats.rx_packets++;
986 ieee->apdevstats.rx_bytes += skb->len;
987 goto rx_exit;
988 }
989 } else if (!frame_authorized) {
990 printk(KERN_DEBUG "%s: dropped frame from "
991 "unauthorized port (IEEE 802.1X): "
992 "ethertype=0x%04x\n",
993 dev->name, ethertype);
994 goto rx_dropped;
995 }
996 }
997 #endif
998
999 #ifdef _RTL8187_EXT_PATCH_
1000 if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_rx_process_dataframe)
1001 {
1002 //Added for mesh rx interrupt.
1003 //spin_lock_irqsave(&ieee->lock,flags);
1004 status = ieee->ext_patch_ieee80211_rx_process_dataframe(ieee, skb, rx_stats);
1005 //spin_unlock_irqrestore(&ieee->lock,flags);
1006
1007 if(status)
1008 // if(ieee->ext_patch_ieee80211_rx_process_dataframe(ieee, skb, rx_stats))
1009 goto rx_exit;
1010 else
1011 goto rx_dropped;
1012 }
1013 #endif
1014
1015 /* convert hdr + possible LLC headers into Ethernet header */
1016 if (skb->len - hdrlen >= 8 &&
1017 ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
1018 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1019 memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1020 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1021 * replace EtherType */
1022 skb_pull(skb, hdrlen + SNAP_SIZE);
1023 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
1024 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
1025 } else {
1026 u16 len;
1027 /* Leave Ethernet header part of hdr and full payload */
1028 skb_pull(skb, hdrlen);
1029 len = htons(skb->len);
1030 memcpy(skb_push(skb, 2), &len, 2);
1031 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
1032 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
1033 }
1034
1035 #ifdef NOT_YET
1036 if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
1037 IEEE80211_FCTL_TODS) &&
1038 skb->len >= ETH_HLEN + ETH_ALEN) {
1039 /* Non-standard frame: get addr4 from its bogus location after
1040 * the payload */
1041 memcpy(skb->data + ETH_ALEN,
1042 skb->data + skb->len - ETH_ALEN, ETH_ALEN);
1043 skb_trim(skb, skb->len - ETH_ALEN);
1044 }
1045 #endif
1046
1047 stats->rx_packets++;
1048 stats->rx_bytes += skb->len;
1049
1050 #ifdef NOT_YET
1051 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1052 ieee->ap->bridge_packets) {
1053 if (dst[0] & 0x01) {
1054 /* copy multicast frame both to the higher layers and
1055 * to the wireless media */
1056 ieee->ap->bridged_multicast++;
1057 skb2 = skb_clone(skb, GFP_ATOMIC);
1058 if (skb2 == NULL)
1059 printk(KERN_DEBUG "%s: skb_clone failed for "
1060 "multicast frame\n", dev->name);
1061 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
1062 /* send frame directly to the associated STA using
1063 * wireless media and not passing to higher layers */
1064 ieee->ap->bridged_unicast++;
1065 skb2 = skb;
1066 skb = NULL;
1067 }
1068 }
1069
1070 if (skb2 != NULL) {
1071 /* send to wireless media */
1072 skb2->protocol = __constant_htons(ETH_P_802_3);
1073 skb2->mac.raw = skb2->nh.raw = skb2->data;
1074 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
1075 skb2->dev = dev;
1076 dev_queue_xmit(skb2);
1077 }
1078
1079 #endif
1080 if (skb) {
1081 skb->protocol = eth_type_trans(skb, dev);
1082 memset(skb->cb, 0, sizeof(skb->cb));
1083 skb->dev = dev;
1084 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1085 ieee->last_rx_ps_time = jiffies;
1086 netif_rx(skb);
1087 }
1088
1089 rx_exit:
1090 #ifdef NOT_YET
1091 if (sta)
1092 hostap_handle_sta_release(sta);
1093 #endif
1094 return 1;
1095
1096 rx_dropped:
1097 stats->rx_dropped++;
1098
1099 /* Returning 0 indicates to caller that we have not handled the SKB--
1100 * so it is still allocated and can be used again by underlying
1101 * hardware as a DMA target */
1102 return 0;
1103 }
1104
1105 #ifdef _RTL8187_EXT_PATCH_
1106 int ieee_ext_skb_p80211_to_ether(struct sk_buff *skb, int hdrlen, u8 *dst, u8 *src)
1107 {
1108 u8 *payload;
1109 u16 ethertype;
1110
1111 /* skb: hdr + (possible reassembled) full plaintext payload */
1112 payload = skb->data + hdrlen;
1113 ethertype = (payload[6] << 8) | payload[7];
1114
1115 /* convert hdr + possible LLC headers into Ethernet header */
1116 if (skb->len - hdrlen >= 8 &&
1117 ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
1118 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1119 memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1120 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1121 * replace EtherType */
1122 skb_pull(skb, hdrlen + SNAP_SIZE);
1123 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
1124 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
1125 } else {
1126 u16 len;
1127 /* Leave Ethernet header part of hdr and full payload */
1128 skb_pull(skb, hdrlen);
1129 len = htons(skb->len);
1130 memcpy(skb_push(skb, 2), &len, 2);
1131 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
1132 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
1133 }
1134
1135 return 1;
1136 }
1137 #endif // _RTL8187_EXT_PATCH_
1138
1139
1140 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
1141
1142 static inline int ieee80211_is_ofdm_rate(u8 rate)
1143 {
1144 switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
1145 case IEEE80211_OFDM_RATE_6MB:
1146 case IEEE80211_OFDM_RATE_9MB:
1147 case IEEE80211_OFDM_RATE_12MB:
1148 case IEEE80211_OFDM_RATE_18MB:
1149 case IEEE80211_OFDM_RATE_24MB:
1150 case IEEE80211_OFDM_RATE_36MB:
1151 case IEEE80211_OFDM_RATE_48MB:
1152 case IEEE80211_OFDM_RATE_54MB:
1153 return 1;
1154 }
1155 return 0;
1156 }
1157
1158 static inline int ieee80211_SignalStrengthTranslate(
1159 int CurrSS
1160 )
1161 {
1162 int RetSS;
1163
1164 // Step 1. Scale mapping.
1165 if(CurrSS >= 71 && CurrSS <= 100)
1166 {
1167 RetSS = 90 + ((CurrSS - 70) / 3);
1168 }
1169 else if(CurrSS >= 41 && CurrSS <= 70)
1170 {
1171 RetSS = 78 + ((CurrSS - 40) / 3);
1172 }
1173 else if(CurrSS >= 31 && CurrSS <= 40)
1174 {
1175 RetSS = 66 + (CurrSS - 30);
1176 }
1177 else if(CurrSS >= 21 && CurrSS <= 30)
1178 {
1179 RetSS = 54 + (CurrSS - 20);
1180 }
1181 else if(CurrSS >= 5 && CurrSS <= 20)
1182 {
1183 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
1184 }
1185 else if(CurrSS == 4)
1186 {
1187 RetSS = 36;
1188 }
1189 else if(CurrSS == 3)
1190 {
1191 RetSS = 27;
1192 }
1193 else if(CurrSS == 2)
1194 {
1195 RetSS = 18;
1196 }
1197 else if(CurrSS == 1)
1198 {
1199 RetSS = 9;
1200 }
1201 else
1202 {
1203 RetSS = CurrSS;
1204 }
1205 //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
1206
1207 // Step 2. Smoothing.
1208
1209 //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
1210
1211 return RetSS;
1212 }
1213
1214 #ifdef ENABLE_DOT11D
1215 static inline void ieee80211_extract_country_ie(
1216 struct ieee80211_device *ieee,
1217 struct ieee80211_info_element *info_element,
1218 struct ieee80211_network *network,
1219 u8 * addr2
1220 )
1221 {
1222 #if 0
1223 u32 i = 0;
1224 u8 * p = (u8*)info_element->data;
1225 printk("-----------------------\n");
1226 printk("%s Country IE:", network->ssid);
1227 for(i=0; i<info_element->len; i++)
1228 printk("\t%2.2x", *(p+i));
1229 printk("\n-----------------------\n");
1230 #endif
1231 if(IS_DOT11D_ENABLE(ieee))
1232 {
1233 if(info_element->len!= 0)
1234 {
1235 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1236 network->CountryIeLen = info_element->len;
1237
1238 if(!IS_COUNTRY_IE_VALID(ieee))
1239 {
1240 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1241 }
1242 }
1243
1244 //
1245 // 070305, rcnjko: I update country IE watch dog here because
1246 // some AP (e.g. Cisco 1242) don't include country IE in their
1247 // probe response frame.
1248 //
1249 if(IS_EQUAL_CIE_SRC(ieee, addr2) )
1250 {
1251 UPDATE_CIE_WATCHDOG(ieee);
1252 }
1253 }
1254
1255 }
1256 #endif
1257
1258 int
1259 ieee80211_TranslateToDbm(
1260 unsigned char SignalStrengthIndex // 0-100 index.
1261 )
1262 {
1263 unsigned char SignalPower; // in dBm.
1264
1265 // Translate to dBm (x=0.5y-95).
1266 SignalPower = (int)SignalStrengthIndex * 7 / 10;
1267 SignalPower -= 95;
1268
1269 return SignalPower;
1270 }
1271 inline int ieee80211_network_init(
1272 struct ieee80211_device *ieee,
1273 struct ieee80211_probe_response *beacon,
1274 struct ieee80211_network *network,
1275 struct ieee80211_rx_stats *stats)
1276 {
1277 #ifdef CONFIG_IEEE80211_DEBUG
1278 char rates_str[64];
1279 char *p;
1280 #endif
1281 struct ieee80211_info_element *info_element;
1282 u16 left;
1283 u8 i;
1284 short offset;
1285 u8 curRate = 0,hOpRate = 0,curRate_ex = 0;
1286
1287 /* Pull out fixed field data */
1288 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1289 network->capability = beacon->capability;
1290 network->last_scanned = jiffies;
1291 network->time_stamp[0] = beacon->time_stamp[0];
1292 network->time_stamp[1] = beacon->time_stamp[1];
1293 network->beacon_interval = beacon->beacon_interval;
1294 /* Where to pull this? beacon->listen_interval;*/
1295 network->listen_interval = 0x0A;
1296 network->rates_len = network->rates_ex_len = 0;
1297 network->last_associate = 0;
1298 network->ssid_len = 0;
1299 network->flags = 0;
1300 network->atim_window = 0;
1301 network->QoS_Enable = 0;
1302 //by amy 080312
1303 network->HighestOperaRate = 0;
1304 //by amy 080312
1305 #ifdef THOMAS_TURBO
1306 network->Turbo_Enable = 0;
1307 #endif
1308 #ifdef ENABLE_DOT11D
1309 network->CountryIeLen = 0;
1310 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
1311 #endif
1312
1313 if (stats->freq == IEEE80211_52GHZ_BAND) {
1314 /* for A band (No DS info) */
1315 network->channel = stats->received_channel;
1316 } else
1317 network->flags |= NETWORK_HAS_CCK;
1318
1319 network->wpa_ie_len = 0;
1320 network->rsn_ie_len = 0;
1321
1322 info_element = &beacon->info_element;
1323 left = stats->len - ((void *)info_element - (void *)beacon);
1324 while (left >= sizeof(struct ieee80211_info_element_hdr)) {
1325 if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) {
1326 IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n",
1327 info_element->len + sizeof(struct ieee80211_info_element),
1328 left);
1329 return 1;
1330 }
1331
1332 switch (info_element->id) {
1333 case MFIE_TYPE_SSID:
1334 if (ieee80211_is_empty_essid(info_element->data,
1335 info_element->len)) {
1336 network->flags |= NETWORK_EMPTY_ESSID;
1337 break;
1338 }
1339
1340 network->ssid_len = min(info_element->len,
1341 (u8)IW_ESSID_MAX_SIZE);
1342 memcpy(network->ssid, info_element->data, network->ssid_len);
1343 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1344 memset(network->ssid + network->ssid_len, 0,
1345 IW_ESSID_MAX_SIZE - network->ssid_len);
1346
1347 IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n",
1348 network->ssid, network->ssid_len);
1349 break;
1350
1351 case MFIE_TYPE_RATES:
1352 #ifdef CONFIG_IEEE80211_DEBUG
1353 p = rates_str;
1354 #endif
1355 network->rates_len = min(info_element->len, MAX_RATES_LENGTH);
1356 for (i = 0; i < network->rates_len; i++) {
1357 network->rates[i] = info_element->data[i];
1358 curRate = network->rates[i] & 0x7f;
1359 if( hOpRate < curRate )
1360 hOpRate = curRate;
1361 #ifdef CONFIG_IEEE80211_DEBUG
1362 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
1363 #endif
1364 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
1365 network->flags |= NETWORK_HAS_OFDM;
1366 if (info_element->data[i] &
1367 IEEE80211_BASIC_RATE_MASK)
1368 network->flags &=
1369 ~NETWORK_HAS_CCK;
1370 }
1371 }
1372
1373 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n",
1374 rates_str, network->rates_len);
1375 break;
1376
1377 case MFIE_TYPE_RATES_EX:
1378 #ifdef CONFIG_IEEE80211_DEBUG
1379 p = rates_str;
1380 #endif
1381 network->rates_ex_len = min(info_element->len, MAX_RATES_EX_LENGTH);
1382 for (i = 0; i < network->rates_ex_len; i++) {
1383 network->rates_ex[i] = info_element->data[i];
1384 curRate_ex = network->rates_ex[i] & 0x7f;
1385 if( hOpRate < curRate_ex )
1386 hOpRate = curRate_ex;
1387 #ifdef CONFIG_IEEE80211_DEBUG
1388 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
1389 #endif
1390 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
1391 network->flags |= NETWORK_HAS_OFDM;
1392 if (info_element->data[i] &
1393 IEEE80211_BASIC_RATE_MASK)
1394 network->flags &=
1395 ~NETWORK_HAS_CCK;
1396 }
1397 }
1398
1399 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1400 rates_str, network->rates_ex_len);
1401 break;
1402
1403 case MFIE_TYPE_DS_SET:
1404 IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
1405 info_element->data[0]);
1406 if (stats->freq == IEEE80211_24GHZ_BAND)
1407 network->channel = info_element->data[0];
1408 break;
1409
1410 case MFIE_TYPE_FH_SET:
1411 IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
1412 break;
1413
1414 case MFIE_TYPE_CF_SET:
1415 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
1416 break;
1417
1418 case MFIE_TYPE_TIM:
1419
1420 if(info_element->len < 4)
1421 break;
1422
1423 network->dtim_period = info_element->data[1];
1424
1425 if(ieee->state != IEEE80211_LINKED)
1426 break;
1427 #if 0
1428 network->last_dtim_sta_time[0] = stats->mac_time[0];
1429 #else
1430 network->last_dtim_sta_time[0] = jiffies;
1431 #endif
1432 network->last_dtim_sta_time[1] = stats->mac_time[1];
1433
1434 network->dtim_data = IEEE80211_DTIM_VALID;
1435
1436 if(info_element->data[0] != 0)
1437 break;
1438
1439 if(info_element->data[2] & 1)
1440 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1441
1442 offset = (info_element->data[2] >> 1)*2;
1443
1444 //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
1445
1446 /* add and modified for ps 2008.1.22 */
1447 if(ieee->assoc_id < 8*offset ||
1448 ieee->assoc_id > 8*(offset + info_element->len -3)) {
1449 break;
1450 }
1451
1452 offset = (ieee->assoc_id/8) - offset;// + ((aid % 8)? 0 : 1) ;
1453
1454 // printk("offset:%x data:%x, ucast:%d\n", offset,
1455 // info_element->data[3+offset] ,
1456 // info_element->data[3+offset] & (1<<(ieee->assoc_id%8)));
1457
1458 if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8))) {
1459 network->dtim_data |= IEEE80211_DTIM_UCAST;
1460 }
1461 break;
1462
1463 case MFIE_TYPE_IBSS_SET:
1464 IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
1465 break;
1466
1467 case MFIE_TYPE_CHALLENGE:
1468 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
1469 break;
1470
1471 case MFIE_TYPE_GENERIC:
1472 //nic is 87B
1473 IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
1474 info_element->len);
1475 if (info_element->len >= 4 &&
1476 info_element->data[0] == 0x00 &&
1477 info_element->data[1] == 0x50 &&
1478 info_element->data[2] == 0xf2 &&
1479 info_element->data[3] == 0x01) {
1480 network->wpa_ie_len = min(info_element->len + 2,
1481 MAX_WPA_IE_LEN);
1482 memcpy(network->wpa_ie, info_element,
1483 network->wpa_ie_len);
1484 }
1485
1486 #ifdef THOMAS_TURBO
1487 if (info_element->len == 7 &&
1488 info_element->data[0] == 0x00 &&
1489 info_element->data[1] == 0xe0 &&
1490 info_element->data[2] == 0x4c &&
1491 info_element->data[3] == 0x01 &&
1492 info_element->data[4] == 0x02) {
1493 network->Turbo_Enable = 1;
1494 }
1495 #endif
1496 if (1 == stats->nic_type) {//nic 87
1497 break;
1498 }
1499
1500 if (info_element->len >= 5 &&
1501 info_element->data[0] == 0x00 &&
1502 info_element->data[1] == 0x50 &&
1503 info_element->data[2] == 0xf2 &&
1504 info_element->data[3] == 0x02 &&
1505 info_element->data[4] == 0x00) {
1506 //printk(KERN_WARNING "wmm info updated: %x\n", info_element->data[6]);
1507 //WMM Information Element
1508 network->wmm_info = info_element->data[6];
1509 network->QoS_Enable = 1;
1510 }
1511
1512 if (info_element->len >= 8 &&
1513 info_element->data[0] == 0x00 &&
1514 info_element->data[1] == 0x50 &&
1515 info_element->data[2] == 0xf2 &&
1516 info_element->data[3] == 0x02 &&
1517 info_element->data[4] == 0x01) {
1518 // Not care about version at present.
1519 //WMM Information Element
1520 //printk(KERN_WARNING "wmm info¶m updated: %x\n", info_element->data[6]);
1521 network->wmm_info = info_element->data[6];
1522 //WMM Parameter Element
1523 memcpy(network->wmm_param, (u8 *)(info_element->data + 8),(info_element->len - 8));
1524 network->QoS_Enable = 1;
1525 }
1526 break;
1527
1528 case MFIE_TYPE_RSN:
1529 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n",
1530 info_element->len);
1531 network->rsn_ie_len = min(info_element->len + 2,
1532 MAX_WPA_IE_LEN);
1533 memcpy(network->rsn_ie, info_element,
1534 network->rsn_ie_len);
1535 break;
1536 #ifdef ENABLE_DOT11D
1537 case MFIE_TYPE_COUNTRY:
1538 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
1539 info_element->len);
1540 // printk("=====>Receive <%s> Country IE\n",network->ssid);
1541 ieee80211_extract_country_ie(ieee, info_element, network, beacon->header.addr2);
1542 break;
1543 #endif
1544 default:
1545 IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
1546 info_element->id);
1547 break;
1548 }
1549
1550 left -= sizeof(struct ieee80211_info_element_hdr) +
1551 info_element->len;
1552 info_element = (struct ieee80211_info_element *)
1553 &info_element->data[info_element->len];
1554 }
1555 //by amy 080312
1556 network->HighestOperaRate = hOpRate;
1557 //by amy 080312
1558 network->mode = 0;
1559 if (stats->freq == IEEE80211_52GHZ_BAND)
1560 network->mode = IEEE_A;
1561 else {
1562 if (network->flags & NETWORK_HAS_OFDM)
1563 network->mode |= IEEE_G;
1564 if (network->flags & NETWORK_HAS_CCK)
1565 network->mode |= IEEE_B;
1566 }
1567
1568 if (network->mode == 0) {
1569 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1570 "network.\n",
1571 escape_essid(network->ssid,
1572 network->ssid_len),
1573 MAC_ARG(network->bssid));
1574 return 1;
1575 }
1576
1577 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1578 network->flags |= NETWORK_EMPTY_ESSID;
1579 #if 0
1580 stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
1581 #endif
1582 stats->signal = ieee80211_TranslateToDbm(stats->signalstrength);
1583 //stats->noise = stats->signal - stats->noise;
1584 stats->noise = ieee80211_TranslateToDbm(100 - stats->signalstrength) - 25;
1585 memcpy(&network->stats, stats, sizeof(network->stats));
1586
1587 return 0;
1588 }
1589
1590 static inline int is_same_network(struct ieee80211_network *src,
1591 struct ieee80211_network *dst,
1592 struct ieee80211_device * ieee)
1593 {
1594 /* A network is only a duplicate if the channel, BSSID, ESSID
1595 * and the capability field (in particular IBSS and BSS) all match.
1596 * We treat all <hidden> with the same BSSID and channel
1597 * as one network */
1598 return (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
1599 //((src->ssid_len == dst->ssid_len) &&
1600 (src->channel == dst->channel) &&
1601 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
1602 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
1603 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
1604 ((src->capability & WLAN_CAPABILITY_IBSS) ==
1605 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
1606 ((src->capability & WLAN_CAPABILITY_BSS) ==
1607 (dst->capability & WLAN_CAPABILITY_BSS)));
1608 }
1609
1610 inline void update_network(struct ieee80211_network *dst,
1611 struct ieee80211_network *src)
1612 {
1613 unsigned char quality = src->stats.signalstrength;
1614 unsigned char signal = 0;
1615 unsigned char noise = 0;
1616 if(dst->stats.signalstrength > 0) {
1617 quality = (dst->stats.signalstrength * 5 + src->stats.signalstrength + 5)/6;
1618 }
1619 signal = ieee80211_TranslateToDbm(quality);
1620 //noise = signal - src->stats.noise;
1621 if(dst->stats.noise > 0)
1622 noise = (dst->stats.noise * 5 + src->stats.noise)/6;
1623 //if(strcmp(dst->ssid, "linksys_lzm000") == 0)
1624 // printk("ssid:%s, quality:%d, signal:%d\n", dst->ssid, quality, signal);
1625 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
1626 dst->stats.signalstrength = quality;
1627 dst->stats.signal = signal;
1628 // printk("==================>stats.signal is %d\n",dst->stats.signal);
1629 dst->stats.noise = noise;
1630
1631
1632 dst->capability = src->capability;
1633 memcpy(dst->rates, src->rates, src->rates_len);
1634 dst->rates_len = src->rates_len;
1635 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1636 dst->rates_ex_len = src->rates_ex_len;
1637 dst->HighestOperaRate= src->HighestOperaRate;
1638 //printk("==========>in %s: src->ssid is %s,chan is %d\n",__func__,src->ssid,src->channel);
1639
1640 //YJ,add,080819,for hidden ap
1641 if(src->ssid_len > 0)
1642 {
1643 //if(src->ssid_len == 13)
1644 // printk("=====================>>>>>>>> Dst ssid: %s Src ssid: %s\n", dst->ssid, src->ssid);
1645 memset(dst->ssid, 0, dst->ssid_len);
1646 dst->ssid_len = src->ssid_len;
1647 memcpy(dst->ssid, src->ssid, src->ssid_len);
1648 }
1649 //YJ,add,080819,for hidden ap,end
1650
1651 dst->channel = src->channel;
1652 dst->mode = src->mode;
1653 dst->flags = src->flags;
1654 dst->time_stamp[0] = src->time_stamp[0];
1655 dst->time_stamp[1] = src->time_stamp[1];
1656
1657 dst->beacon_interval = src->beacon_interval;
1658 dst->listen_interval = src->listen_interval;
1659 dst->atim_window = src->atim_window;
1660 dst->dtim_period = src->dtim_period;
1661 dst->dtim_data = src->dtim_data;
1662 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
1663 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
1664 // printk("update:%s, dtim_period:%x, dtim_data:%x\n", src->ssid, src->dtim_period, src->dtim_data);
1665 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1666 dst->wpa_ie_len = src->wpa_ie_len;
1667 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1668 dst->rsn_ie_len = src->rsn_ie_len;
1669
1670 dst->last_scanned = jiffies;
1671 /* dst->last_associate is not overwritten */
1672 // disable QoS process now, added by David 2006/7/25
1673 #if 1
1674 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
1675 /*
1676 if((dst->wmm_info^src->wmm_info)&0x0f) {//Param Set Count change, update Parameter
1677 memcpy(dst->wmm_param, src->wmm_param, IEEE80211_AC_PRAM_LEN);
1678 }
1679 */
1680 if(src->wmm_param[0].ac_aci_acm_aifsn|| \
1681 src->wmm_param[1].ac_aci_acm_aifsn|| \
1682 src->wmm_param[2].ac_aci_acm_aifsn|| \
1683 src->wmm_param[3].ac_aci_acm_aifsn) {
1684 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
1685 }
1686 dst->QoS_Enable = src->QoS_Enable;
1687 #else
1688 dst->QoS_Enable = 1;//for Rtl8187 simulation
1689 #endif
1690 dst->SignalStrength = src->SignalStrength;
1691 #ifdef THOMAS_TURBO
1692 dst->Turbo_Enable = src->Turbo_Enable;
1693 #endif
1694 #ifdef ENABLE_DOT11D
1695 dst->CountryIeLen = src->CountryIeLen;
1696 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
1697 #endif
1698 }
1699
1700
1701 inline void ieee80211_process_probe_response(
1702 struct ieee80211_device *ieee,
1703 struct ieee80211_probe_response *beacon,
1704 struct ieee80211_rx_stats *stats)
1705 {
1706 struct ieee80211_network network;
1707 struct ieee80211_network *target;
1708 struct ieee80211_network *oldest = NULL;
1709 #ifdef CONFIG_IEEE80211_DEBUG
1710 struct ieee80211_info_element *info_element = &beacon->info_element;
1711 #endif
1712 unsigned long flags;
1713 short renew;
1714 u8 wmm_info;
1715 u8 is_beacon = (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON)? 1:0; //YJ,add,080819,for hidden ap
1716
1717 memset(&network, 0, sizeof(struct ieee80211_network));
1718 //rz
1719 #ifdef _RTL8187_EXT_PATCH_
1720 if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_process_probe_response_1) {
1721 ieee->ext_patch_ieee80211_process_probe_response_1(ieee, beacon, stats);
1722 return;
1723 }
1724 #endif
1725
1726 IEEE80211_DEBUG_SCAN(
1727 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1728 escape_essid(info_element->data, info_element->len),
1729 MAC_ARG(beacon->header.addr3),
1730 (beacon->capability & (1<<0xf)) ? '1' : '',
1731 (beacon->capability & (1<<0xe)) ? '1' : '',
1732 (beacon->capability & (1<<0xd)) ? '1' : '',
1733 (beacon->capability & (1<<0xc)) ? '1' : '',
1734 (beacon->capability & (1<<0xb)) ? '1' : '',
1735 (beacon->capability & (1<<0xa)) ? '1' : '',
1736 (beacon->capability & (1<<0x9)) ? '1' : '',
1737 (beacon->capability & (1<<0x8)) ? '1' : '',
1738 (beacon->capability & (1<<0x7)) ? '1' : '',
1739 (beacon->capability & (1<<0x6)) ? '1' : '',
1740 (beacon->capability & (1<<0x5)) ? '1' : '',
1741 (beacon->capability & (1<<0x4)) ? '1' : '',
1742 (beacon->capability & (1<<0x3)) ? '1' : '',
1743 (beacon->capability & (1<<0x2)) ? '1' : '',
1744 (beacon->capability & (1<<0x1)) ? '1' : '',
1745 (beacon->capability & (1<<0x0)) ? '1' : '');
1746 #if 0
1747 if(strcmp(escape_essid(beacon->info_element.data, beacon->info_element.len), "rtl_softap") == 0)
1748 {
1749 if(WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON)
1750 {
1751 u32 i = 0, len = stats->len;
1752 u8 * p = (u8*)beacon;
1753 printk("-----------------------\n");
1754 printk("rtl_softap Beacon:");
1755 for(i=0; i<len; i++)
1756 printk("\t%2.2x", *(p+i));
1757 printk("\n-----------------------\n");
1758 }
1759 }
1760 #endif
1761 if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1762 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1763 escape_essid(info_element->data,
1764 info_element->len),
1765 MAC_ARG(beacon->header.addr3),
1766 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1767 IEEE80211_STYPE_PROBE_RESP ?
1768 "PROBE RESPONSE" : "BEACON");
1769 return;
1770 }
1771
1772 #ifdef ENABLE_DOT11D
1773 // For Asus EeePc request,
1774 // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
1775 // wireless adapter should follow the country code.
1776 // (2) If there is no any country code in beacon,
1777 // then wireless adapter should do active scan from ch1~11 and
1778 // passive scan from ch12~14
1779 if(ieee->bGlobalDomain)
1780 {
1781 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP)
1782 {
1783 // Case 1: Country code
1784 if(IS_COUNTRY_IE_VALID(ieee) )
1785 {
1786 if( !IsLegalChannel(ieee, network.channel) )
1787 {
1788 printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
1789 return;
1790 }
1791 }
1792 // Case 2: No any country code.
1793 else
1794 {
1795 // Filter over channel ch12~14
1796 if(network.channel > 11)
1797 {
1798 printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
1799 return;
1800 }
1801 }
1802 }
1803 else
1804 {
1805 // Case 1: Country code
1806 if(IS_COUNTRY_IE_VALID(ieee) )
1807 {
1808 if( !IsLegalChannel(ieee, network.channel) )
1809 {
1810 printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel);
1811 return;
1812 }
1813 }
1814 // Case 2: No any country code.
1815 else
1816 {
1817 // Filter over channel ch12~14
1818 if(network.channel > 14)
1819 {
1820 printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel);
1821 return;
1822 }
1823 }
1824 }
1825 }
1826 #endif
1827 /* The network parsed correctly -- so now we scan our known networks
1828 * to see if we can find it in our list.
1829 *
1830 * NOTE: This search is definitely not optimized. Once its doing
1831 * the "right thing" we'll optimize it for efficiency if
1832 * necessary */
1833
1834 /* Search for this entry in the list and update it if it is
1835 * already there. */
1836
1837 spin_lock_irqsave(&ieee->lock, flags);
1838
1839 if(is_same_network(&ieee->current_network, &network, ieee)) {
1840 wmm_info = ieee->current_network.wmm_info;
1841 //YJ,add,080819,for hidden ap
1842 if(is_beacon == 0)
1843 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
1844 else if(ieee->state == IEEE80211_LINKED)
1845 ieee->NumRxBcnInPeriod++;
1846 //YJ,add,080819,for hidden ap,end
1847 //printk("====>network.ssid=%s cur_ssid=%s\n", network.ssid, ieee->current_network.ssid);
1848 update_network(&ieee->current_network, &network);
1849 }
1850
1851 list_for_each_entry(target, &ieee->network_list, list) {
1852 if (is_same_network(target, &network, ieee))
1853 break;
1854 if ((oldest == NULL) ||
1855 (target->last_scanned < oldest->last_scanned))
1856 oldest = target;
1857 }
1858
1859 /* If we didn't find a match, then get a new network slot to initialize
1860 * with this beacon's information */
1861 if (&target->list == &ieee->network_list) {
1862 if (list_empty(&ieee->network_free_list)) {
1863 /* If there are no more slots, expire the oldest */
1864 list_del(&oldest->list);
1865 target = oldest;
1866 IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1867 "network list.\n",
1868 escape_essid(target->ssid,
1869 target->ssid_len),
1870 MAC_ARG(target->bssid));
1871 } else {
1872 /* Otherwise just pull from the free list */
1873 target = list_entry(ieee->network_free_list.next,
1874 struct ieee80211_network, list);
1875 list_del(ieee->network_free_list.next);
1876 }
1877
1878
1879 #ifdef CONFIG_IEEE80211_DEBUG
1880 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1881 escape_essid(network.ssid,
1882 network.ssid_len),
1883 MAC_ARG(network.bssid),
1884 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1885 IEEE80211_STYPE_PROBE_RESP ?
1886 "PROBE RESPONSE" : "BEACON");
1887 #endif
1888
1889 #ifdef _RTL8187_EXT_PATCH_
1890 network.ext_entry = target->ext_entry;
1891 #endif
1892 memcpy(target, &network, sizeof(*target));
1893 list_add_tail(&target->list, &ieee->network_list);
1894 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
1895 ieee80211_softmac_new_net(ieee,&network);
1896 } else {
1897 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1898 escape_essid(target->ssid,
1899 target->ssid_len),
1900 MAC_ARG(target->bssid),
1901 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1902 IEEE80211_STYPE_PROBE_RESP ?
1903 "PROBE RESPONSE" : "BEACON");
1904
1905 /* we have an entry and we are going to update it. But this entry may
1906 * be already expired. In this case we do the same as we found a new
1907 * net and call the new_net handler
1908 */
1909 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
1910 //YJ,add,080819,for hidden ap
1911 if(is_beacon == 0)
1912 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
1913 //if(strncmp(network.ssid, "linksys-c",9) == 0)
1914 // printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
1915 if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
1916 && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
1917 ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
1918 renew = 1;
1919 //YJ,add,080819,for hidden ap,end
1920 update_network(target, &network);
1921 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
1922 ieee80211_softmac_new_net(ieee,&network);
1923 }
1924
1925 spin_unlock_irqrestore(&ieee->lock, flags);
1926 }
1927
1928 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1929 struct ieee80211_hdr *header,
1930 struct ieee80211_rx_stats *stats)
1931 {
1932 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
1933
1934 case IEEE80211_STYPE_BEACON:
1935 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1936 WLAN_FC_GET_STYPE(header->frame_ctl));
1937 IEEE80211_DEBUG_SCAN("Beacon\n");
1938 ieee80211_process_probe_response(
1939 ieee, (struct ieee80211_probe_response *)header, stats);
1940 break;
1941
1942 case IEEE80211_STYPE_PROBE_RESP:
1943 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1944 WLAN_FC_GET_STYPE(header->frame_ctl));
1945 IEEE80211_DEBUG_SCAN("Probe response\n");
1946 ieee80211_process_probe_response(
1947 ieee, (struct ieee80211_probe_response *)header, stats);
1948 break;
1949 //rz
1950 #ifdef _RTL8187_EXT_PATCH_
1951 case IEEE80211_STYPE_PROBE_REQ:
1952 IEEE80211_DEBUG_MGMT("received PROBE REQUEST (%d)\n",
1953 WLAN_FC_GET_STYPE(header->frame_ctl));
1954 IEEE80211_DEBUG_SCAN("Probe request\n");
1955 ///
1956 if( ieee->iw_mode == ieee->iw_ext_mode && ieee->ext_patch_ieee80211_rx_mgt_on_probe_req )
1957 ieee->ext_patch_ieee80211_rx_mgt_on_probe_req( ieee, (struct ieee80211_probe_request *)header, stats);
1958 break;
1959 #endif // _RTL8187_EXT_PATCH_
1960
1961 }
1962 }
1963
1964 #if 0
1965 EXPORT_SYMBOL(ieee80211_rx_mgt);
1966 EXPORT_SYMBOL(ieee80211_rx);
1967 EXPORT_SYMBOL(ieee80211_network_init);
1968 #ifdef _RTL8187_EXT_PATCH_
1969 EXPORT_SYMBOL(ieee_ext_skb_p80211_to_ether);
1970 #endif
1971 #endif
1972
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