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/wireless.h>
41 #include <linux/etherdevice.h>
42 #include <asm/uaccess.h>
43 #include <linux/ctype.h>
44
45 #include "ieee80211.h"
46 #include "dot11d.h"
ieee80211_monitor_rx(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats)47 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
48 struct sk_buff *skb,
49 struct ieee80211_rx_stats *rx_stats)
50 {
51 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *)skb->data;
52 u16 fc = le16_to_cpu(hdr->frame_ctl);
53
54 skb->dev = ieee->dev;
55 skb_reset_mac_header(skb);
56
57 skb_pull(skb, ieee80211_get_hdrlen(fc));
58 skb->pkt_type = PACKET_OTHERHOST;
59 skb->protocol = __constant_htons(ETH_P_80211_RAW);
60 memset(skb->cb, 0, sizeof(skb->cb));
61 netif_rx(skb);
62 }
63
64
65 /* Called only as a tasklet (software IRQ) */
66 static struct ieee80211_frag_entry *
ieee80211_frag_cache_find(struct ieee80211_device * ieee,unsigned int seq,unsigned int frag,u8 tid,u8 * src,u8 * dst)67 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
68 unsigned int frag, u8 tid,u8 *src, u8 *dst)
69 {
70 struct ieee80211_frag_entry *entry;
71 int i;
72
73 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
74 entry = &ieee->frag_cache[tid][i];
75 if (entry->skb != NULL &&
76 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
77 IEEE80211_DEBUG_FRAG(
78 "expiring fragment cache entry "
79 "seq=%u last_frag=%u\n",
80 entry->seq, entry->last_frag);
81 dev_kfree_skb_any(entry->skb);
82 entry->skb = NULL;
83 }
84
85 if (entry->skb != NULL && entry->seq == seq &&
86 (entry->last_frag + 1 == frag || frag == -1) &&
87 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
88 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
89 return entry;
90 }
91
92 return NULL;
93 }
94
95 /* Called only as a tasklet (software IRQ) */
96 static struct sk_buff *
ieee80211_frag_cache_get(struct ieee80211_device * ieee,struct ieee80211_hdr_4addr * hdr)97 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
98 struct ieee80211_hdr_4addr *hdr)
99 {
100 struct sk_buff *skb = NULL;
101 u16 fc = le16_to_cpu(hdr->frame_ctl);
102 u16 sc = le16_to_cpu(hdr->seq_ctl);
103 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
104 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
105 struct ieee80211_frag_entry *entry;
106 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
107 struct ieee80211_hdr_4addrqos *hdr_4addrqos;
108 u8 tid;
109
110 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
111 hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
112 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
113 tid = UP2AC(tid);
114 tid ++;
115 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
116 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
117 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
118 tid = UP2AC(tid);
119 tid ++;
120 } else {
121 tid = 0;
122 }
123
124 if (frag == 0) {
125 /* Reserve enough space to fit maximum frame length */
126 skb = dev_alloc_skb(ieee->dev->mtu +
127 sizeof(struct ieee80211_hdr_4addr) +
128 8 /* LLC */ +
129 2 /* alignment */ +
130 8 /* WEP */ +
131 ETH_ALEN /* WDS */ +
132 (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
133 if (skb == NULL)
134 return NULL;
135
136 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
137 ieee->frag_next_idx[tid]++;
138 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
139 ieee->frag_next_idx[tid] = 0;
140
141 if (entry->skb != NULL)
142 dev_kfree_skb_any(entry->skb);
143
144 entry->first_frag_time = jiffies;
145 entry->seq = seq;
146 entry->last_frag = frag;
147 entry->skb = skb;
148 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
149 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
150 } else {
151 /* received a fragment of a frame for which the head fragment
152 * should have already been received */
153 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
154 hdr->addr1);
155 if (entry != NULL) {
156 entry->last_frag = frag;
157 skb = entry->skb;
158 }
159 }
160
161 return skb;
162 }
163
164
165 /* Called only as a tasklet (software IRQ) */
ieee80211_frag_cache_invalidate(struct ieee80211_device * ieee,struct ieee80211_hdr_4addr * hdr)166 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
167 struct ieee80211_hdr_4addr *hdr)
168 {
169 u16 fc = le16_to_cpu(hdr->frame_ctl);
170 u16 sc = le16_to_cpu(hdr->seq_ctl);
171 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
172 struct ieee80211_frag_entry *entry;
173 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
174 struct ieee80211_hdr_4addrqos *hdr_4addrqos;
175 u8 tid;
176
177 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
178 hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
179 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
180 tid = UP2AC(tid);
181 tid ++;
182 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
183 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
184 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
185 tid = UP2AC(tid);
186 tid ++;
187 } else {
188 tid = 0;
189 }
190
191 entry = ieee80211_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
192 hdr->addr1);
193
194 if (entry == NULL) {
195 IEEE80211_DEBUG_FRAG(
196 "could not invalidate fragment cache "
197 "entry (seq=%u)\n", seq);
198 return -1;
199 }
200
201 entry->skb = NULL;
202 return 0;
203 }
204
205
206
207 /* ieee80211_rx_frame_mgtmt
208 *
209 * Responsible for handling management control frames
210 *
211 * Called by ieee80211_rx */
212 static inline int
ieee80211_rx_frame_mgmt(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats,u16 type,u16 stype)213 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
214 struct ieee80211_rx_stats *rx_stats, u16 type,
215 u16 stype)
216 {
217 /* On the struct stats definition there is written that
218 * this is not mandatory.... but seems that the probe
219 * response parser uses it
220 */
221 struct ieee80211_hdr_3addr * hdr = (struct ieee80211_hdr_3addr *)skb->data;
222
223 rx_stats->len = skb->len;
224 ieee80211_rx_mgt(ieee,(struct ieee80211_hdr_4addr *)skb->data,rx_stats);
225 //if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN)))
226 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN)))//use ADDR1 to perform address matching for Management frames
227 {
228 dev_kfree_skb_any(skb);
229 return 0;
230 }
231
232 ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
233
234 dev_kfree_skb_any(skb);
235
236 return 0;
237
238 #ifdef NOT_YET
239 if (ieee->iw_mode == IW_MODE_MASTER) {
240 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
241 ieee->dev->name);
242 return 0;
243 /*
244 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
245 skb->data);*/
246 }
247
248 if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) {
249 if (stype == WLAN_FC_STYPE_BEACON &&
250 ieee->iw_mode == IW_MODE_MASTER) {
251 struct sk_buff *skb2;
252 /* Process beacon frames also in kernel driver to
253 * update STA(AP) table statistics */
254 skb2 = skb_clone(skb, GFP_ATOMIC);
255 if (skb2)
256 hostap_rx(skb2->dev, skb2, rx_stats);
257 }
258
259 /* send management frames to the user space daemon for
260 * processing */
261 ieee->apdevstats.rx_packets++;
262 ieee->apdevstats.rx_bytes += skb->len;
263 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
264 return 0;
265 }
266
267 if (ieee->iw_mode == IW_MODE_MASTER) {
268 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
269 printk(KERN_DEBUG "%s: unknown management frame "
270 "(type=0x%02x, stype=0x%02x) dropped\n",
271 skb->dev->name, type, stype);
272 return -1;
273 }
274
275 hostap_rx(skb->dev, skb, rx_stats);
276 return 0;
277 }
278
279 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
280 "received in non-Host AP mode\n", skb->dev->name);
281 return -1;
282 #endif
283 }
284
285
286
287 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
288 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
289 static unsigned char rfc1042_header[] =
290 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
291 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
292 static unsigned char bridge_tunnel_header[] =
293 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
294 /* No encapsulation header if EtherType < 0x600 (=length) */
295
296 /* Called by ieee80211_rx_frame_decrypt */
ieee80211_is_eapol_frame(struct ieee80211_device * ieee,struct sk_buff * skb,size_t hdrlen)297 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
298 struct sk_buff *skb, size_t hdrlen)
299 {
300 struct net_device *dev = ieee->dev;
301 u16 fc, ethertype;
302 struct ieee80211_hdr_4addr *hdr;
303 u8 *pos;
304
305 if (skb->len < 24)
306 return 0;
307
308 hdr = (struct ieee80211_hdr_4addr *) skb->data;
309 fc = le16_to_cpu(hdr->frame_ctl);
310
311 /* check that the frame is unicast frame to us */
312 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
313 IEEE80211_FCTL_TODS &&
314 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
315 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
316 /* ToDS frame with own addr BSSID and DA */
317 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
318 IEEE80211_FCTL_FROMDS &&
319 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
320 /* FromDS frame with own addr as DA */
321 } else
322 return 0;
323
324 if (skb->len < 24 + 8)
325 return 0;
326
327 /* check for port access entity Ethernet type */
328 // pos = skb->data + 24;
329 pos = skb->data + hdrlen;
330 ethertype = (pos[6] << 8) | pos[7];
331 if (ethertype == ETH_P_PAE)
332 return 1;
333
334 return 0;
335 }
336
337 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
338 static inline int
ieee80211_rx_frame_decrypt(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_crypt_data * crypt)339 ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
340 struct ieee80211_crypt_data *crypt)
341 {
342 struct ieee80211_hdr_4addr *hdr;
343 int res, hdrlen;
344
345 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
346 return 0;
347 if (ieee->hwsec_active)
348 {
349 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
350 tcb_desc->bHwSec = 1;
351 }
352 hdr = (struct ieee80211_hdr_4addr *) skb->data;
353 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
354
355 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
356 if (ieee->tkip_countermeasures &&
357 strcmp(crypt->ops->name, "TKIP") == 0) {
358 if (net_ratelimit()) {
359 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
360 "received packet from %pM\n",
361 ieee->dev->name, hdr->addr2);
362 }
363 return -1;
364 }
365 #endif
366
367 atomic_inc(&crypt->refcnt);
368 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
369 atomic_dec(&crypt->refcnt);
370 if (res < 0) {
371 IEEE80211_DEBUG_DROP(
372 "decryption failed (SA=%pM"
373 ") res=%d\n", hdr->addr2, res);
374 if (res == -2)
375 IEEE80211_DEBUG_DROP("Decryption failed ICV "
376 "mismatch (key %d)\n",
377 skb->data[hdrlen + 3] >> 6);
378 ieee->ieee_stats.rx_discards_undecryptable++;
379 return -1;
380 }
381
382 return res;
383 }
384
385
386 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
387 static inline int
ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device * ieee,struct sk_buff * skb,int keyidx,struct ieee80211_crypt_data * crypt)388 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
389 int keyidx, struct ieee80211_crypt_data *crypt)
390 {
391 struct ieee80211_hdr_4addr *hdr;
392 int res, hdrlen;
393
394 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
395 return 0;
396 if (ieee->hwsec_active)
397 {
398 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
399 tcb_desc->bHwSec = 1;
400 }
401
402 hdr = (struct ieee80211_hdr_4addr *) skb->data;
403 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
404
405 atomic_inc(&crypt->refcnt);
406 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
407 atomic_dec(&crypt->refcnt);
408 if (res < 0) {
409 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
410 " (SA=%pM keyidx=%d)\n",
411 ieee->dev->name, hdr->addr2, keyidx);
412 return -1;
413 }
414
415 return 0;
416 }
417
418
419 /* this function is stolen from ipw2200 driver*/
420 #define IEEE_PACKET_RETRY_TIME (5*HZ)
is_duplicate_packet(struct ieee80211_device * ieee,struct ieee80211_hdr_4addr * header)421 static int is_duplicate_packet(struct ieee80211_device *ieee,
422 struct ieee80211_hdr_4addr *header)
423 {
424 u16 fc = le16_to_cpu(header->frame_ctl);
425 u16 sc = le16_to_cpu(header->seq_ctl);
426 u16 seq = WLAN_GET_SEQ_SEQ(sc);
427 u16 frag = WLAN_GET_SEQ_FRAG(sc);
428 u16 *last_seq, *last_frag;
429 unsigned long *last_time;
430 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
431 struct ieee80211_hdr_4addrqos *hdr_4addrqos;
432 u8 tid;
433
434
435 //TO2DS and QoS
436 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
437 hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header;
438 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
439 tid = UP2AC(tid);
440 tid ++;
441 } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
442 hdr_3addrqos = (struct ieee80211_hdr_3addrqos*)header;
443 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
444 tid = UP2AC(tid);
445 tid ++;
446 } else { // no QoS
447 tid = 0;
448 }
449
450 switch (ieee->iw_mode) {
451 case IW_MODE_ADHOC:
452 {
453 struct list_head *p;
454 struct ieee_ibss_seq *entry = NULL;
455 u8 *mac = header->addr2;
456 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
457 //for (pos = (head)->next; pos != (head); pos = pos->next)
458 //__list_for_each(p, &ieee->ibss_mac_hash[index]) {
459 list_for_each(p, &ieee->ibss_mac_hash[index]) {
460 entry = list_entry(p, struct ieee_ibss_seq, list);
461 if (!memcmp(entry->mac, mac, ETH_ALEN))
462 break;
463 }
464 // if (memcmp(entry->mac, mac, ETH_ALEN)){
465 if (p == &ieee->ibss_mac_hash[index]) {
466 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
467 if (!entry) {
468 printk(KERN_WARNING "Cannot malloc new mac entry\n");
469 return 0;
470 }
471 memcpy(entry->mac, mac, ETH_ALEN);
472 entry->seq_num[tid] = seq;
473 entry->frag_num[tid] = frag;
474 entry->packet_time[tid] = jiffies;
475 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
476 return 0;
477 }
478 last_seq = &entry->seq_num[tid];
479 last_frag = &entry->frag_num[tid];
480 last_time = &entry->packet_time[tid];
481 break;
482 }
483
484 case IW_MODE_INFRA:
485 last_seq = &ieee->last_rxseq_num[tid];
486 last_frag = &ieee->last_rxfrag_num[tid];
487 last_time = &ieee->last_packet_time[tid];
488
489 break;
490 default:
491 return 0;
492 }
493
494 // if(tid != 0) {
495 // printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
496 // }
497 if ((*last_seq == seq) &&
498 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
499 if (*last_frag == frag){
500 //printk(KERN_WARNING "[1] go drop!\n");
501 goto drop;
502
503 }
504 if (*last_frag + 1 != frag)
505 /* out-of-order fragment */
506 //printk(KERN_WARNING "[2] go drop!\n");
507 goto drop;
508 } else
509 *last_seq = seq;
510
511 *last_frag = frag;
512 *last_time = jiffies;
513 return 0;
514
515 drop:
516 // BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
517 // printk("DUP\n");
518
519 return 1;
520 }
521 bool
AddReorderEntry(PRX_TS_RECORD pTS,PRX_REORDER_ENTRY pReorderEntry)522 AddReorderEntry(
523 PRX_TS_RECORD pTS,
524 PRX_REORDER_ENTRY pReorderEntry
525 )
526 {
527 struct list_head *pList = &pTS->RxPendingPktList;
528 while(pList->next != &pTS->RxPendingPktList)
529 {
530 if( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
531 {
532 pList = pList->next;
533 }
534 else if( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
535 {
536 return false;
537 }
538 else
539 {
540 break;
541 }
542 }
543 pReorderEntry->List.next = pList->next;
544 pReorderEntry->List.next->prev = &pReorderEntry->List;
545 pReorderEntry->List.prev = pList;
546 pList->next = &pReorderEntry->List;
547
548 return true;
549 }
550
ieee80211_indicate_packets(struct ieee80211_device * ieee,struct ieee80211_rxb ** prxbIndicateArray,u8 index)551 void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb** prxbIndicateArray,u8 index)
552 {
553 u8 i = 0 , j=0;
554 u16 ethertype;
555 // if(index > 1)
556 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__FUNCTION__,index);
557 for(j = 0; j<index; j++)
558 {
559 //added by amy for reorder
560 struct ieee80211_rxb* prxb = prxbIndicateArray[j];
561 for(i = 0; i<prxb->nr_subframes; i++) {
562 struct sk_buff *sub_skb = prxb->subframes[i];
563
564 /* convert hdr + possible LLC headers into Ethernet header */
565 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
566 if (sub_skb->len >= 8 &&
567 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
568 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
569 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
570 /* remove RFC1042 or Bridge-Tunnel encapsulation and
571 * replace EtherType */
572 skb_pull(sub_skb, SNAP_SIZE);
573 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
574 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
575 } else {
576 u16 len;
577 /* Leave Ethernet header part of hdr and full payload */
578 len = htons(sub_skb->len);
579 memcpy(skb_push(sub_skb, 2), &len, 2);
580 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
581 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
582 }
583 //stats->rx_packets++;
584 //stats->rx_bytes += sub_skb->len;
585
586 /* Indicat the packets to upper layer */
587 if (sub_skb) {
588 //printk("0skb_len(%d)\n", skb->len);
589 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
590 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
591 sub_skb->dev = ieee->dev;
592 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
593 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
594 ieee->last_rx_ps_time = jiffies;
595 //printk("1skb_len(%d)\n", skb->len);
596 netif_rx(sub_skb);
597 }
598 }
599 kfree(prxb);
600 prxb = NULL;
601 }
602 }
603
604
RxReorderIndicatePacket(struct ieee80211_device * ieee,struct ieee80211_rxb * prxb,PRX_TS_RECORD pTS,u16 SeqNum)605 void RxReorderIndicatePacket( struct ieee80211_device *ieee,
606 struct ieee80211_rxb* prxb,
607 PRX_TS_RECORD pTS,
608 u16 SeqNum)
609 {
610 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
611 PRX_REORDER_ENTRY pReorderEntry = NULL;
612 struct ieee80211_rxb* prxbIndicateArray[REORDER_WIN_SIZE];
613 u8 WinSize = pHTInfo->RxReorderWinSize;
614 u16 WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
615 u8 index = 0;
616 bool bMatchWinStart = false, bPktInBuf = false;
617 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__FUNCTION__,SeqNum,pTS->RxIndicateSeq,WinSize);
618 /* Rx Reorder initialize condition.*/
619 if(pTS->RxIndicateSeq == 0xffff) {
620 pTS->RxIndicateSeq = SeqNum;
621 }
622
623 /* Drop out the packet which SeqNum is smaller than WinStart */
624 if(SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
625 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
626 pTS->RxIndicateSeq, SeqNum);
627 pHTInfo->RxReorderDropCounter++;
628 {
629 int i;
630 for(i =0; i < prxb->nr_subframes; i++) {
631 dev_kfree_skb(prxb->subframes[i]);
632 }
633 kfree(prxb);
634 prxb = NULL;
635 }
636 return;
637 }
638
639 /*
640 * Sliding window manipulation. Conditions includes:
641 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
642 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
643 */
644 if(SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
645 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
646 bMatchWinStart = true;
647 } else if(SN_LESS(WinEnd, SeqNum)) {
648 if(SeqNum >= (WinSize - 1)) {
649 pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
650 } else {
651 pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
652 }
653 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
654 }
655
656 /*
657 * Indication process.
658 * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
659 * with the SeqNum smaller than latest WinStart and buffer other packets.
660 */
661 /* For Rx Reorder condition:
662 * 1. All packets with SeqNum smaller than WinStart => Indicate
663 * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
664 */
665 if(bMatchWinStart) {
666 /* Current packet is going to be indicated.*/
667 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
668 pTS->RxIndicateSeq, SeqNum);
669 prxbIndicateArray[0] = prxb;
670 // printk("========================>%s(): SeqNum is %d\n",__FUNCTION__,SeqNum);
671 index = 1;
672 } else {
673 /* Current packet is going to be inserted into pending list.*/
674 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to orderd list\n",__FUNCTION__);
675 if(!list_empty(&ieee->RxReorder_Unused_List)) {
676 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List);
677 list_del_init(&pReorderEntry->List);
678
679 /* Make a reorder entry and insert into a the packet list.*/
680 pReorderEntry->SeqNum = SeqNum;
681 pReorderEntry->prxb = prxb;
682 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);
683
684 if(!AddReorderEntry(pTS, pReorderEntry)) {
685 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
686 __FUNCTION__, pTS->RxIndicateSeq, SeqNum);
687 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
688 {
689 int i;
690 for(i =0; i < prxb->nr_subframes; i++) {
691 dev_kfree_skb(prxb->subframes[i]);
692 }
693 kfree(prxb);
694 prxb = NULL;
695 }
696 } else {
697 IEEE80211_DEBUG(IEEE80211_DL_REORDER,
698 "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
699 }
700 }
701 else {
702 /*
703 * Packets are dropped if there is not enough reorder entries.
704 * This part shall be modified!! We can just indicate all the
705 * packets in buffer and get reorder entries.
706 */
707 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
708 {
709 int i;
710 for(i =0; i < prxb->nr_subframes; i++) {
711 dev_kfree_skb(prxb->subframes[i]);
712 }
713 kfree(prxb);
714 prxb = NULL;
715 }
716 }
717 }
718
719 /* Check if there is any packet need indicate.*/
720 while(!list_empty(&pTS->RxPendingPktList)) {
721 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): start RREORDER indicate\n",__FUNCTION__);
722 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List);
723 if( SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
724 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
725 {
726 /* This protect buffer from overflow. */
727 if(index >= REORDER_WIN_SIZE) {
728 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
729 bPktInBuf = true;
730 break;
731 }
732
733 list_del_init(&pReorderEntry->List);
734
735 if(SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
736 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
737
738 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packets indication!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
739 prxbIndicateArray[index] = pReorderEntry->prxb;
740 // printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);
741 index++;
742
743 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
744 } else {
745 bPktInBuf = true;
746 break;
747 }
748 }
749
750 /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
751 if(index>0) {
752 // Cancel previous pending timer.
753 // del_timer_sync(&pTS->RxPktPendingTimer);
754 pTS->RxTimeoutIndicateSeq = 0xffff;
755
756 // Indicate packets
757 if(index>REORDER_WIN_SIZE){
758 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer buffer full!! \n");
759 return;
760 }
761 ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
762 }
763
764 if(bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
765 // Set new pending timer.
766 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): SET rx timeout timer\n", __FUNCTION__);
767 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
768 if(timer_pending(&pTS->RxPktPendingTimer))
769 del_timer_sync(&pTS->RxPktPendingTimer);
770 pTS->RxPktPendingTimer.expires = jiffies + MSECS(pHTInfo->RxReorderPendingTime);
771 add_timer(&pTS->RxPktPendingTimer);
772 }
773 }
774
parse_subframe(struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats,struct ieee80211_rxb * rxb,u8 * src,u8 * dst)775 u8 parse_subframe(struct sk_buff *skb,
776 struct ieee80211_rx_stats *rx_stats,
777 struct ieee80211_rxb *rxb,u8* src,u8* dst)
778 {
779 struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr* )skb->data;
780 u16 fc = le16_to_cpu(hdr->frame_ctl);
781
782 u16 LLCOffset= sizeof(struct ieee80211_hdr_3addr);
783 u16 ChkLength;
784 bool bIsAggregateFrame = false;
785 u16 nSubframe_Length;
786 u8 nPadding_Length = 0;
787 u16 SeqNum=0;
788
789 struct sk_buff *sub_skb;
790 u8 *data_ptr;
791 /* just for debug purpose */
792 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
793
794 if((IEEE80211_QOS_HAS_SEQ(fc))&&\
795 (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
796 bIsAggregateFrame = true;
797 }
798
799 if(IEEE80211_QOS_HAS_SEQ(fc)) {
800 LLCOffset += 2;
801 }
802
803 if(rx_stats->bContainHTC) {
804 LLCOffset += sHTCLng;
805 }
806 //printk("ChkLength = %d\n", LLCOffset);
807 // Null packet, don't indicate it to upper layer
808 ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
809
810 if( skb->len <= ChkLength ) {
811 return 0;
812 }
813
814 skb_pull(skb, LLCOffset);
815
816 if(!bIsAggregateFrame) {
817 rxb->nr_subframes = 1;
818 #ifdef JOHN_NOCPY
819 rxb->subframes[0] = skb;
820 #else
821 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
822 #endif
823
824 memcpy(rxb->src,src,ETH_ALEN);
825 memcpy(rxb->dst,dst,ETH_ALEN);
826 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
827 return 1;
828 } else {
829 rxb->nr_subframes = 0;
830 memcpy(rxb->src,src,ETH_ALEN);
831 memcpy(rxb->dst,dst,ETH_ALEN);
832 while(skb->len > ETHERNET_HEADER_SIZE) {
833 /* Offset 12 denote 2 mac address */
834 nSubframe_Length = *((u16*)(skb->data + 12));
835 //==m==>change the length order
836 nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
837
838 if(skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
839 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
840 __FUNCTION__,rxb->nr_subframes);
841 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__FUNCTION__, nSubframe_Length);
842 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
843 printk("The Packet SeqNum is %d\n",SeqNum);
844 return 0;
845 }
846
847 /* move the data point to data content */
848 skb_pull(skb, ETHERNET_HEADER_SIZE);
849
850 #ifdef JOHN_NOCPY
851 sub_skb = skb_clone(skb, GFP_ATOMIC);
852 sub_skb->len = nSubframe_Length;
853 sub_skb->tail = sub_skb->data + nSubframe_Length;
854 #else
855 /* Allocate new skb for releasing to upper layer */
856 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
857 skb_reserve(sub_skb, 12);
858 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
859 memcpy(data_ptr,skb->data,nSubframe_Length);
860 #endif
861 rxb->subframes[rxb->nr_subframes++] = sub_skb;
862 if(rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
863 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
864 break;
865 }
866 skb_pull(skb,nSubframe_Length);
867
868 if(skb->len != 0) {
869 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
870 if(nPadding_Length == 4) {
871 nPadding_Length = 0;
872 }
873
874 if(skb->len < nPadding_Length) {
875 return 0;
876 }
877
878 skb_pull(skb,nPadding_Length);
879 }
880 }
881 #ifdef JOHN_NOCPY
882 dev_kfree_skb(skb);
883 #endif
884 //{just for debug added by david
885 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
886 //}
887 return rxb->nr_subframes;
888 }
889 }
890
891 /* All received frames are sent to this function. @skb contains the frame in
892 * IEEE 802.11 format, i.e., in the format it was sent over air.
893 * This function is called only as a tasklet (software IRQ). */
ieee80211_rx(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats)894 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
895 struct ieee80211_rx_stats *rx_stats)
896 {
897 struct net_device *dev = ieee->dev;
898 struct ieee80211_hdr_4addr *hdr;
899 //struct ieee80211_hdr_3addrqos *hdr;
900
901 size_t hdrlen;
902 u16 fc, type, stype, sc;
903 struct net_device_stats *stats;
904 unsigned int frag;
905 u8 *payload;
906 u16 ethertype;
907 //added by amy for reorder
908 u8 TID = 0;
909 u16 SeqNum = 0;
910 PRX_TS_RECORD pTS = NULL;
911 //bool bIsAggregateFrame = false;
912 //added by amy for reorder
913 #ifdef NOT_YET
914 struct net_device *wds = NULL;
915 struct sk_buff *skb2 = NULL;
916 struct net_device *wds = NULL;
917 int frame_authorized = 0;
918 int from_assoc_ap = 0;
919 void *sta = NULL;
920 #endif
921 // u16 qos_ctl = 0;
922 u8 dst[ETH_ALEN];
923 u8 src[ETH_ALEN];
924 u8 bssid[ETH_ALEN];
925 struct ieee80211_crypt_data *crypt = NULL;
926 int keyidx = 0;
927
928 int i;
929 struct ieee80211_rxb* rxb = NULL;
930 // cheat the the hdr type
931 hdr = (struct ieee80211_hdr_4addr *)skb->data;
932 stats = &ieee->stats;
933
934 if (skb->len < 10) {
935 printk(KERN_INFO "%s: SKB length < 10\n",
936 dev->name);
937 goto rx_dropped;
938 }
939
940 fc = le16_to_cpu(hdr->frame_ctl);
941 type = WLAN_FC_GET_TYPE(fc);
942 stype = WLAN_FC_GET_STYPE(fc);
943 sc = le16_to_cpu(hdr->seq_ctl);
944
945 frag = WLAN_GET_SEQ_FRAG(sc);
946 hdrlen = ieee80211_get_hdrlen(fc);
947
948 if(HTCCheck(ieee, skb->data))
949 {
950 if(net_ratelimit())
951 printk("find HTCControl\n");
952 hdrlen += 4;
953 rx_stats->bContainHTC = 1;
954 }
955
956 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
957 #ifdef NOT_YET
958 #if WIRELESS_EXT > 15
959 /* Put this code here so that we avoid duplicating it in all
960 * Rx paths. - Jean II */
961 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
962 /* If spy monitoring on */
963 if (iface->spy_data.spy_number > 0) {
964 struct iw_quality wstats;
965 wstats.level = rx_stats->rssi;
966 wstats.noise = rx_stats->noise;
967 wstats.updated = 6; /* No qual value */
968 /* Update spy records */
969 wireless_spy_update(dev, hdr->addr2, &wstats);
970 }
971 #endif /* IW_WIRELESS_SPY */
972 #endif /* WIRELESS_EXT > 15 */
973 hostap_update_rx_stats(local->ap, hdr, rx_stats);
974 #endif
975
976 #if WIRELESS_EXT > 15
977 if (ieee->iw_mode == IW_MODE_MONITOR) {
978 ieee80211_monitor_rx(ieee, skb, rx_stats);
979 stats->rx_packets++;
980 stats->rx_bytes += skb->len;
981 return 1;
982 }
983 #endif
984 if (ieee->host_decrypt) {
985 int idx = 0;
986 if (skb->len >= hdrlen + 3)
987 idx = skb->data[hdrlen + 3] >> 6;
988 crypt = ieee->crypt[idx];
989 #ifdef NOT_YET
990 sta = NULL;
991
992 /* Use station specific key to override default keys if the
993 * receiver address is a unicast address ("individual RA"). If
994 * bcrx_sta_key parameter is set, station specific key is used
995 * even with broad/multicast targets (this is against IEEE
996 * 802.11, but makes it easier to use different keys with
997 * stations that do not support WEP key mapping). */
998
999 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
1000 (void) hostap_handle_sta_crypto(local, hdr, &crypt,
1001 &sta);
1002 #endif
1003
1004 /* allow NULL decrypt to indicate an station specific override
1005 * for default encryption */
1006 if (crypt && (crypt->ops == NULL ||
1007 crypt->ops->decrypt_mpdu == NULL))
1008 crypt = NULL;
1009
1010 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
1011 /* This seems to be triggered by some (multicast?)
1012 * frames from other than current BSS, so just drop the
1013 * frames silently instead of filling system log with
1014 * these reports. */
1015 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
1016 " (SA=%pM)\n",
1017 hdr->addr2);
1018 ieee->ieee_stats.rx_discards_undecryptable++;
1019 goto rx_dropped;
1020 }
1021 }
1022
1023 if (skb->len < IEEE80211_DATA_HDR3_LEN)
1024 goto rx_dropped;
1025
1026 // if QoS enabled, should check the sequence for each of the AC
1027 if( (ieee->pHTInfo->bCurRxReorderEnable == false) || !ieee->current_network.qos_data.active|| !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)){
1028 if (is_duplicate_packet(ieee, hdr))
1029 goto rx_dropped;
1030
1031 }
1032 else
1033 {
1034 PRX_TS_RECORD pRxTS = NULL;
1035 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__FUNCTION__, tid);
1036 if(GetTs(
1037 ieee,
1038 (PTS_COMMON_INFO*) &pRxTS,
1039 hdr->addr2,
1040 (u8)Frame_QoSTID((u8*)(skb->data)),
1041 RX_DIR,
1042 true))
1043 {
1044
1045 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->RxLastFragNum is %d,frag is %d,pRxTS->RxLastSeqNum is %d,seq is %d\n",__FUNCTION__,pRxTS->RxLastFragNum,frag,pRxTS->RxLastSeqNum,WLAN_GET_SEQ_SEQ(sc));
1046 if( (fc & (1<<11)) &&
1047 (frag == pRxTS->RxLastFragNum) &&
1048 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum) )
1049 {
1050 goto rx_dropped;
1051 }
1052 else
1053 {
1054 pRxTS->RxLastFragNum = frag;
1055 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
1056 }
1057 }
1058 else
1059 {
1060 IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n",__FUNCTION__);
1061 goto rx_dropped;
1062 }
1063 }
1064 if (type == IEEE80211_FTYPE_MGMT) {
1065
1066
1067 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1068 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1069 goto rx_dropped;
1070 else
1071 goto rx_exit;
1072 }
1073
1074 /* Data frame - extract src/dst addresses */
1075 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1076 case IEEE80211_FCTL_FROMDS:
1077 memcpy(dst, hdr->addr1, ETH_ALEN);
1078 memcpy(src, hdr->addr3, ETH_ALEN);
1079 memcpy(bssid, hdr->addr2, ETH_ALEN);
1080 break;
1081 case IEEE80211_FCTL_TODS:
1082 memcpy(dst, hdr->addr3, ETH_ALEN);
1083 memcpy(src, hdr->addr2, ETH_ALEN);
1084 memcpy(bssid, hdr->addr1, ETH_ALEN);
1085 break;
1086 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1087 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1088 goto rx_dropped;
1089 memcpy(dst, hdr->addr3, ETH_ALEN);
1090 memcpy(src, hdr->addr4, ETH_ALEN);
1091 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1092 break;
1093 case 0:
1094 memcpy(dst, hdr->addr1, ETH_ALEN);
1095 memcpy(src, hdr->addr2, ETH_ALEN);
1096 memcpy(bssid, hdr->addr3, ETH_ALEN);
1097 break;
1098 }
1099
1100 #ifdef NOT_YET
1101 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
1102 goto rx_dropped;
1103 if (wds) {
1104 skb->dev = dev = wds;
1105 stats = hostap_get_stats(dev);
1106 }
1107
1108 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1109 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
1110 ieee->stadev &&
1111 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
1112 /* Frame from BSSID of the AP for which we are a client */
1113 skb->dev = dev = ieee->stadev;
1114 stats = hostap_get_stats(dev);
1115 from_assoc_ap = 1;
1116 }
1117 #endif
1118
1119 dev->last_rx = jiffies;
1120
1121 #ifdef NOT_YET
1122 if ((ieee->iw_mode == IW_MODE_MASTER ||
1123 ieee->iw_mode == IW_MODE_REPEAT) &&
1124 !from_assoc_ap) {
1125 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
1126 wds != NULL)) {
1127 case AP_RX_CONTINUE_NOT_AUTHORIZED:
1128 frame_authorized = 0;
1129 break;
1130 case AP_RX_CONTINUE:
1131 frame_authorized = 1;
1132 break;
1133 case AP_RX_DROP:
1134 goto rx_dropped;
1135 case AP_RX_EXIT:
1136 goto rx_exit;
1137 }
1138 }
1139 #endif
1140 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1141 /* Nullfunc frames may have PS-bit set, so they must be passed to
1142 * hostap_handle_sta_rx() before being dropped here. */
1143 if (stype != IEEE80211_STYPE_DATA &&
1144 stype != IEEE80211_STYPE_DATA_CFACK &&
1145 stype != IEEE80211_STYPE_DATA_CFPOLL &&
1146 stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
1147 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1148 ) {
1149 if (stype != IEEE80211_STYPE_NULLFUNC)
1150 IEEE80211_DEBUG_DROP(
1151 "RX: dropped data frame "
1152 "with no data (type=0x%02x, "
1153 "subtype=0x%02x, len=%d)\n",
1154 type, stype, skb->len);
1155 goto rx_dropped;
1156 }
1157 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1158 goto rx_dropped;
1159
1160 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1161
1162 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1163 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
1164 {
1165 printk("decrypt frame error\n");
1166 goto rx_dropped;
1167 }
1168
1169
1170 hdr = (struct ieee80211_hdr_4addr *) skb->data;
1171
1172 /* skb: hdr + (possibly fragmented) plaintext payload */
1173 // PR: FIXME: hostap has additional conditions in the "if" below:
1174 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1175 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1176 int flen;
1177 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1178 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1179
1180 if (!frag_skb) {
1181 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1182 "Rx cannot get skb from fragment "
1183 "cache (morefrag=%d seq=%u frag=%u)\n",
1184 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1185 WLAN_GET_SEQ_SEQ(sc), frag);
1186 goto rx_dropped;
1187 }
1188 flen = skb->len;
1189 if (frag != 0)
1190 flen -= hdrlen;
1191
1192 if (frag_skb->tail + flen > frag_skb->end) {
1193 printk(KERN_WARNING "%s: host decrypted and "
1194 "reassembled frame did not fit skb\n",
1195 dev->name);
1196 ieee80211_frag_cache_invalidate(ieee, hdr);
1197 goto rx_dropped;
1198 }
1199
1200 if (frag == 0) {
1201 /* copy first fragment (including full headers) into
1202 * beginning of the fragment cache skb */
1203 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1204 } else {
1205 /* append frame payload to the end of the fragment
1206 * cache skb */
1207 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1208 flen);
1209 }
1210 dev_kfree_skb_any(skb);
1211 skb = NULL;
1212
1213 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1214 /* more fragments expected - leave the skb in fragment
1215 * cache for now; it will be delivered to upper layers
1216 * after all fragments have been received */
1217 goto rx_exit;
1218 }
1219
1220 /* this was the last fragment and the frame will be
1221 * delivered, so remove skb from fragment cache */
1222 skb = frag_skb;
1223 hdr = (struct ieee80211_hdr_4addr *) skb->data;
1224 ieee80211_frag_cache_invalidate(ieee, hdr);
1225 }
1226
1227 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1228 * encrypted/authenticated */
1229 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1230 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1231 {
1232 printk("==>decrypt msdu error\n");
1233 goto rx_dropped;
1234 }
1235
1236 //added by amy for AP roaming
1237 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1238 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1239
1240 hdr = (struct ieee80211_hdr_4addr *) skb->data;
1241 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1242 if (/*ieee->ieee802_1x &&*/
1243 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1244
1245 #ifdef CONFIG_IEEE80211_DEBUG
1246 /* pass unencrypted EAPOL frames even if encryption is
1247 * configured */
1248 struct eapol *eap = (struct eapol *)(skb->data +
1249 24);
1250 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1251 eap_get_type(eap->type));
1252 #endif
1253 } else {
1254 IEEE80211_DEBUG_DROP(
1255 "encryption configured, but RX "
1256 "frame not encrypted (SA=%pM)\n",
1257 hdr->addr2);
1258 goto rx_dropped;
1259 }
1260 }
1261
1262 #ifdef CONFIG_IEEE80211_DEBUG
1263 if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1264 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1265 struct eapol *eap = (struct eapol *)(skb->data +
1266 24);
1267 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1268 eap_get_type(eap->type));
1269 }
1270 #endif
1271
1272 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1273 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1274 IEEE80211_DEBUG_DROP(
1275 "dropped unencrypted RX data "
1276 "frame from %pM"
1277 " (drop_unencrypted=1)\n",
1278 hdr->addr2);
1279 goto rx_dropped;
1280 }
1281 /*
1282 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1283 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1284 }
1285 */
1286 //added by amy for reorder
1287 if(ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1288 && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1))
1289 {
1290 TID = Frame_QoSTID(skb->data);
1291 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1292 GetTs(ieee,(PTS_COMMON_INFO*) &pTS,hdr->addr2,TID,RX_DIR,true);
1293 if(TID !=0 && TID !=3)
1294 {
1295 ieee->bis_any_nonbepkts = true;
1296 }
1297 }
1298 //added by amy for reorder
1299 /* skb: hdr + (possible reassembled) full plaintext payload */
1300 payload = skb->data + hdrlen;
1301 //ethertype = (payload[6] << 8) | payload[7];
1302 rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC);
1303 if(rxb == NULL)
1304 {
1305 IEEE80211_DEBUG(IEEE80211_DL_ERR,"%s(): kmalloc rxb error\n",__FUNCTION__);
1306 goto rx_dropped;
1307 }
1308 /* to parse amsdu packets */
1309 /* qos data packets & reserved bit is 1 */
1310 if(parse_subframe(skb,rx_stats,rxb,src,dst) == 0) {
1311 /* only to free rxb, and not submit the packets to upper layer */
1312 for(i =0; i < rxb->nr_subframes; i++) {
1313 dev_kfree_skb(rxb->subframes[i]);
1314 }
1315 kfree(rxb);
1316 rxb = NULL;
1317 goto rx_dropped;
1318 }
1319
1320 //added by amy for reorder
1321 if(ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL){
1322 //added by amy for reorder
1323 for(i = 0; i<rxb->nr_subframes; i++) {
1324 struct sk_buff *sub_skb = rxb->subframes[i];
1325
1326 if (sub_skb) {
1327 /* convert hdr + possible LLC headers into Ethernet header */
1328 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1329 if (sub_skb->len >= 8 &&
1330 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1331 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1332 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1333 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1334 * replace EtherType */
1335 skb_pull(sub_skb, SNAP_SIZE);
1336 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1337 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1338 } else {
1339 u16 len;
1340 /* Leave Ethernet header part of hdr and full payload */
1341 len = htons(sub_skb->len);
1342 memcpy(skb_push(sub_skb, 2), &len, 2);
1343 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1344 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1345 }
1346
1347 stats->rx_packets++;
1348 stats->rx_bytes += sub_skb->len;
1349 if(is_multicast_ether_addr(dst)) {
1350 stats->multicast++;
1351 }
1352
1353 /* Indicat the packets to upper layer */
1354 //printk("0skb_len(%d)\n", skb->len);
1355 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1356 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1357 sub_skb->dev = dev;
1358 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1359 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
1360 ieee->last_rx_ps_time = jiffies;
1361 //printk("1skb_len(%d)\n", skb->len);
1362 netif_rx(sub_skb);
1363 }
1364 }
1365 kfree(rxb);
1366 rxb = NULL;
1367
1368 }
1369 else
1370 {
1371 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__FUNCTION__);
1372 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1373 }
1374 #ifndef JOHN_NOCPY
1375 dev_kfree_skb(skb);
1376 #endif
1377
1378 rx_exit:
1379 #ifdef NOT_YET
1380 if (sta)
1381 hostap_handle_sta_release(sta);
1382 #endif
1383 return 1;
1384
1385 rx_dropped:
1386 kfree(rxb);
1387 rxb = NULL;
1388 stats->rx_dropped++;
1389
1390 /* Returning 0 indicates to caller that we have not handled the SKB--
1391 * so it is still allocated and can be used again by underlying
1392 * hardware as a DMA target */
1393 return 0;
1394 }
1395
1396 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
1397
1398 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1399
1400 /*
1401 * Make the structure we read from the beacon packet to have
1402 * the right values
1403 */
ieee80211_verify_qos_info(struct ieee80211_qos_information_element * info_element,int sub_type)1404 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1405 *info_element, int sub_type)
1406 {
1407
1408 if (info_element->qui_subtype != sub_type)
1409 return -1;
1410 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1411 return -1;
1412 if (info_element->qui_type != QOS_OUI_TYPE)
1413 return -1;
1414 if (info_element->version != QOS_VERSION_1)
1415 return -1;
1416
1417 return 0;
1418 }
1419
1420
1421 /*
1422 * Parse a QoS parameter element
1423 */
ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info * element_param,struct ieee80211_info_element * info_element)1424 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
1425 *element_param, struct ieee80211_info_element
1426 *info_element)
1427 {
1428 int ret = 0;
1429 u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
1430
1431 if ((info_element == NULL) || (element_param == NULL))
1432 return -1;
1433
1434 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1435 memcpy(element_param->info_element.qui, info_element->data,
1436 info_element->len);
1437 element_param->info_element.elementID = info_element->id;
1438 element_param->info_element.length = info_element->len;
1439 } else
1440 ret = -1;
1441 if (ret == 0)
1442 ret = ieee80211_verify_qos_info(&element_param->info_element,
1443 QOS_OUI_PARAM_SUB_TYPE);
1444 return ret;
1445 }
1446
1447 /*
1448 * Parse a QoS information element
1449 */
ieee80211_read_qos_info_element(struct ieee80211_qos_information_element * element_info,struct ieee80211_info_element * info_element)1450 static int ieee80211_read_qos_info_element(struct
1451 ieee80211_qos_information_element
1452 *element_info, struct ieee80211_info_element
1453 *info_element)
1454 {
1455 int ret = 0;
1456 u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1457
1458 if (element_info == NULL)
1459 return -1;
1460 if (info_element == NULL)
1461 return -1;
1462
1463 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1464 memcpy(element_info->qui, info_element->data,
1465 info_element->len);
1466 element_info->elementID = info_element->id;
1467 element_info->length = info_element->len;
1468 } else
1469 ret = -1;
1470
1471 if (ret == 0)
1472 ret = ieee80211_verify_qos_info(element_info,
1473 QOS_OUI_INFO_SUB_TYPE);
1474 return ret;
1475 }
1476
1477
1478 /*
1479 * Write QoS parameters from the ac parameters.
1480 */
ieee80211_qos_convert_ac_to_parameters(struct ieee80211_qos_parameter_info * param_elm,struct ieee80211_qos_parameters * qos_param)1481 static int ieee80211_qos_convert_ac_to_parameters(struct
1482 ieee80211_qos_parameter_info
1483 *param_elm, struct
1484 ieee80211_qos_parameters
1485 *qos_param)
1486 {
1487 int rc = 0;
1488 int i;
1489 struct ieee80211_qos_ac_parameter *ac_params;
1490 u8 aci;
1491 //u8 cw_min;
1492 //u8 cw_max;
1493
1494 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1495 ac_params = &(param_elm->ac_params_record[i]);
1496
1497 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1498
1499 if(aci >= QOS_QUEUE_NUM)
1500 continue;
1501 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1502
1503 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1504 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1505
1506 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1507
1508 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1509
1510 qos_param->flag[aci] =
1511 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1512 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1513 }
1514 return rc;
1515 }
1516
1517 /*
1518 * we have a generic data element which it may contain QoS information or
1519 * parameters element. check the information element length to decide
1520 * which type to read
1521 */
ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element * info_element,struct ieee80211_network * network)1522 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1523 *info_element,
1524 struct ieee80211_network *network)
1525 {
1526 int rc = 0;
1527 struct ieee80211_qos_parameters *qos_param = NULL;
1528 struct ieee80211_qos_information_element qos_info_element;
1529
1530 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1531
1532 if (rc == 0) {
1533 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1534 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1535 } else {
1536 struct ieee80211_qos_parameter_info param_element;
1537
1538 rc = ieee80211_read_qos_param_element(¶m_element,
1539 info_element);
1540 if (rc == 0) {
1541 qos_param = &(network->qos_data.parameters);
1542 ieee80211_qos_convert_ac_to_parameters(¶m_element,
1543 qos_param);
1544 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1545 network->qos_data.param_count =
1546 param_element.info_element.ac_info & 0x0F;
1547 }
1548 }
1549
1550 if (rc == 0) {
1551 IEEE80211_DEBUG_QOS("QoS is supported\n");
1552 network->qos_data.supported = 1;
1553 }
1554 return rc;
1555 }
1556
1557 #ifdef CONFIG_IEEE80211_DEBUG
1558 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1559
get_info_element_string(u16 id)1560 static const char *get_info_element_string(u16 id)
1561 {
1562 switch (id) {
1563 MFIE_STRING(SSID);
1564 MFIE_STRING(RATES);
1565 MFIE_STRING(FH_SET);
1566 MFIE_STRING(DS_SET);
1567 MFIE_STRING(CF_SET);
1568 MFIE_STRING(TIM);
1569 MFIE_STRING(IBSS_SET);
1570 MFIE_STRING(COUNTRY);
1571 MFIE_STRING(HOP_PARAMS);
1572 MFIE_STRING(HOP_TABLE);
1573 MFIE_STRING(REQUEST);
1574 MFIE_STRING(CHALLENGE);
1575 MFIE_STRING(POWER_CONSTRAINT);
1576 MFIE_STRING(POWER_CAPABILITY);
1577 MFIE_STRING(TPC_REQUEST);
1578 MFIE_STRING(TPC_REPORT);
1579 MFIE_STRING(SUPP_CHANNELS);
1580 MFIE_STRING(CSA);
1581 MFIE_STRING(MEASURE_REQUEST);
1582 MFIE_STRING(MEASURE_REPORT);
1583 MFIE_STRING(QUIET);
1584 MFIE_STRING(IBSS_DFS);
1585 // MFIE_STRING(ERP_INFO);
1586 MFIE_STRING(RSN);
1587 MFIE_STRING(RATES_EX);
1588 MFIE_STRING(GENERIC);
1589 MFIE_STRING(QOS_PARAMETER);
1590 default:
1591 return "UNKNOWN";
1592 }
1593 }
1594 #endif
1595
ieee80211_extract_country_ie(struct ieee80211_device * ieee,struct ieee80211_info_element * info_element,struct ieee80211_network * network,u8 * addr2)1596 static inline void ieee80211_extract_country_ie(
1597 struct ieee80211_device *ieee,
1598 struct ieee80211_info_element *info_element,
1599 struct ieee80211_network *network,
1600 u8 * addr2
1601 )
1602 {
1603 if(IS_DOT11D_ENABLE(ieee))
1604 {
1605 if(info_element->len!= 0)
1606 {
1607 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1608 network->CountryIeLen = info_element->len;
1609
1610 if(!IS_COUNTRY_IE_VALID(ieee))
1611 {
1612 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1613 }
1614 }
1615
1616 //
1617 // 070305, rcnjko: I update country IE watch dog here because
1618 // some AP (e.g. Cisco 1242) don't include country IE in their
1619 // probe response frame.
1620 //
1621 if(IS_EQUAL_CIE_SRC(ieee, addr2) )
1622 {
1623 UPDATE_CIE_WATCHDOG(ieee);
1624 }
1625 }
1626
1627 }
1628
ieee80211_parse_info_param(struct ieee80211_device * ieee,struct ieee80211_info_element * info_element,u16 length,struct ieee80211_network * network,struct ieee80211_rx_stats * stats)1629 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1630 struct ieee80211_info_element *info_element,
1631 u16 length,
1632 struct ieee80211_network *network,
1633 struct ieee80211_rx_stats *stats)
1634 {
1635 u8 i;
1636 short offset;
1637 u16 tmp_htcap_len=0;
1638 u16 tmp_htinfo_len=0;
1639 u16 ht_realtek_agg_len=0;
1640 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1641 // u16 broadcom_len = 0;
1642 #ifdef CONFIG_IEEE80211_DEBUG
1643 char rates_str[64];
1644 char *p;
1645 #endif
1646
1647 while (length >= sizeof(*info_element)) {
1648 if (sizeof(*info_element) + info_element->len > length) {
1649 IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1650 "info_element->len + 2 > left : "
1651 "info_element->len+2=%zd left=%d, id=%d.\n",
1652 info_element->len +
1653 sizeof(*info_element),
1654 length, info_element->id);
1655 /* We stop processing but don't return an error here
1656 * because some misbehaviour APs break this rule. ie.
1657 * Orinoco AP1000. */
1658 break;
1659 }
1660
1661 switch (info_element->id) {
1662 case MFIE_TYPE_SSID:
1663 if (ieee80211_is_empty_essid(info_element->data,
1664 info_element->len)) {
1665 network->flags |= NETWORK_EMPTY_ESSID;
1666 break;
1667 }
1668
1669 network->ssid_len = min(info_element->len,
1670 (u8) IW_ESSID_MAX_SIZE);
1671 memcpy(network->ssid, info_element->data, network->ssid_len);
1672 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1673 memset(network->ssid + network->ssid_len, 0,
1674 IW_ESSID_MAX_SIZE - network->ssid_len);
1675
1676 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1677 network->ssid, network->ssid_len);
1678 break;
1679
1680 case MFIE_TYPE_RATES:
1681 #ifdef CONFIG_IEEE80211_DEBUG
1682 p = rates_str;
1683 #endif
1684 network->rates_len = min(info_element->len,
1685 MAX_RATES_LENGTH);
1686 for (i = 0; i < network->rates_len; i++) {
1687 network->rates[i] = info_element->data[i];
1688 #ifdef CONFIG_IEEE80211_DEBUG
1689 p += snprintf(p, sizeof(rates_str) -
1690 (p - rates_str), "%02X ",
1691 network->rates[i]);
1692 #endif
1693 if (ieee80211_is_ofdm_rate
1694 (info_element->data[i])) {
1695 network->flags |= NETWORK_HAS_OFDM;
1696 if (info_element->data[i] &
1697 IEEE80211_BASIC_RATE_MASK)
1698 network->flags &=
1699 ~NETWORK_HAS_CCK;
1700 }
1701 }
1702
1703 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1704 rates_str, network->rates_len);
1705 break;
1706
1707 case MFIE_TYPE_RATES_EX:
1708 #ifdef CONFIG_IEEE80211_DEBUG
1709 p = rates_str;
1710 #endif
1711 network->rates_ex_len = min(info_element->len,
1712 MAX_RATES_EX_LENGTH);
1713 for (i = 0; i < network->rates_ex_len; i++) {
1714 network->rates_ex[i] = info_element->data[i];
1715 #ifdef CONFIG_IEEE80211_DEBUG
1716 p += snprintf(p, sizeof(rates_str) -
1717 (p - rates_str), "%02X ",
1718 network->rates[i]);
1719 #endif
1720 if (ieee80211_is_ofdm_rate
1721 (info_element->data[i])) {
1722 network->flags |= NETWORK_HAS_OFDM;
1723 if (info_element->data[i] &
1724 IEEE80211_BASIC_RATE_MASK)
1725 network->flags &=
1726 ~NETWORK_HAS_CCK;
1727 }
1728 }
1729
1730 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1731 rates_str, network->rates_ex_len);
1732 break;
1733
1734 case MFIE_TYPE_DS_SET:
1735 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1736 info_element->data[0]);
1737 network->channel = info_element->data[0];
1738 break;
1739
1740 case MFIE_TYPE_FH_SET:
1741 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1742 break;
1743
1744 case MFIE_TYPE_CF_SET:
1745 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1746 break;
1747
1748 case MFIE_TYPE_TIM:
1749 if(info_element->len < 4)
1750 break;
1751
1752 network->tim.tim_count = info_element->data[0];
1753 network->tim.tim_period = info_element->data[1];
1754
1755 network->dtim_period = info_element->data[1];
1756 if(ieee->state != IEEE80211_LINKED)
1757 break;
1758
1759 network->last_dtim_sta_time[0] = stats->mac_time[0];
1760 network->last_dtim_sta_time[1] = stats->mac_time[1];
1761
1762 network->dtim_data = IEEE80211_DTIM_VALID;
1763
1764 if(info_element->data[0] != 0)
1765 break;
1766
1767 if(info_element->data[2] & 1)
1768 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1769
1770 offset = (info_element->data[2] >> 1)*2;
1771
1772 //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
1773
1774 if(ieee->assoc_id < 8*offset ||
1775 ieee->assoc_id > 8*(offset + info_element->len -3))
1776
1777 break;
1778
1779 offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1780
1781 if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1782 network->dtim_data |= IEEE80211_DTIM_UCAST;
1783
1784 //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1785 break;
1786
1787 case MFIE_TYPE_ERP:
1788 network->erp_value = info_element->data[0];
1789 network->flags |= NETWORK_HAS_ERP_VALUE;
1790 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1791 network->erp_value);
1792 break;
1793 case MFIE_TYPE_IBSS_SET:
1794 network->atim_window = info_element->data[0];
1795 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1796 network->atim_window);
1797 break;
1798
1799 case MFIE_TYPE_CHALLENGE:
1800 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1801 break;
1802
1803 case MFIE_TYPE_GENERIC:
1804 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1805 info_element->len);
1806 if (!ieee80211_parse_qos_info_param_IE(info_element,
1807 network))
1808 break;
1809
1810 if (info_element->len >= 4 &&
1811 info_element->data[0] == 0x00 &&
1812 info_element->data[1] == 0x50 &&
1813 info_element->data[2] == 0xf2 &&
1814 info_element->data[3] == 0x01) {
1815 network->wpa_ie_len = min(info_element->len + 2,
1816 MAX_WPA_IE_LEN);
1817 memcpy(network->wpa_ie, info_element,
1818 network->wpa_ie_len);
1819 break;
1820 }
1821
1822 #ifdef THOMAS_TURBO
1823 if (info_element->len == 7 &&
1824 info_element->data[0] == 0x00 &&
1825 info_element->data[1] == 0xe0 &&
1826 info_element->data[2] == 0x4c &&
1827 info_element->data[3] == 0x01 &&
1828 info_element->data[4] == 0x02) {
1829 network->Turbo_Enable = 1;
1830 }
1831 #endif
1832
1833 //for HTcap and HTinfo parameters
1834 if(tmp_htcap_len == 0){
1835 if(info_element->len >= 4 &&
1836 info_element->data[0] == 0x00 &&
1837 info_element->data[1] == 0x90 &&
1838 info_element->data[2] == 0x4c &&
1839 info_element->data[3] == 0x033){
1840
1841 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1842 if(tmp_htcap_len != 0){
1843 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1844 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1845 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1846 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1847 }
1848 }
1849 if(tmp_htcap_len != 0)
1850 network->bssht.bdSupportHT = true;
1851 else
1852 network->bssht.bdSupportHT = false;
1853 }
1854
1855
1856 if(tmp_htinfo_len == 0){
1857 if(info_element->len >= 4 &&
1858 info_element->data[0] == 0x00 &&
1859 info_element->data[1] == 0x90 &&
1860 info_element->data[2] == 0x4c &&
1861 info_element->data[3] == 0x034){
1862
1863 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1864 if(tmp_htinfo_len != 0){
1865 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1866 if(tmp_htinfo_len){
1867 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1868 sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1869 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1870 }
1871
1872 }
1873
1874 }
1875 }
1876
1877 if(ieee->aggregation){
1878 if(network->bssht.bdSupportHT){
1879 if(info_element->len >= 4 &&
1880 info_element->data[0] == 0x00 &&
1881 info_element->data[1] == 0xe0 &&
1882 info_element->data[2] == 0x4c &&
1883 info_element->data[3] == 0x02){
1884
1885 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
1886 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
1887
1888 }
1889 if(ht_realtek_agg_len >= 5){
1890 network->bssht.bdRT2RTAggregation = true;
1891
1892 if((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1893 network->bssht.bdRT2RTLongSlotTime = true;
1894 }
1895 }
1896
1897 }
1898
1899 //if(tmp_htcap_len !=0 || tmp_htinfo_len != 0)
1900 {
1901 if((info_element->len >= 3 &&
1902 info_element->data[0] == 0x00 &&
1903 info_element->data[1] == 0x05 &&
1904 info_element->data[2] == 0xb5) ||
1905 (info_element->len >= 3 &&
1906 info_element->data[0] == 0x00 &&
1907 info_element->data[1] == 0x0a &&
1908 info_element->data[2] == 0xf7) ||
1909 (info_element->len >= 3 &&
1910 info_element->data[0] == 0x00 &&
1911 info_element->data[1] == 0x10 &&
1912 info_element->data[2] == 0x18)){
1913
1914 network->broadcom_cap_exist = true;
1915
1916 }
1917 }
1918 if(info_element->len >= 3 &&
1919 info_element->data[0] == 0x00 &&
1920 info_element->data[1] == 0x0c &&
1921 info_element->data[2] == 0x43)
1922 {
1923 network->ralink_cap_exist = true;
1924 }
1925 else
1926 network->ralink_cap_exist = false;
1927 //added by amy for atheros AP
1928 if((info_element->len >= 3 &&
1929 info_element->data[0] == 0x00 &&
1930 info_element->data[1] == 0x03 &&
1931 info_element->data[2] == 0x7f) ||
1932 (info_element->len >= 3 &&
1933 info_element->data[0] == 0x00 &&
1934 info_element->data[1] == 0x13 &&
1935 info_element->data[2] == 0x74))
1936 {
1937 printk("========>%s(): athros AP is exist\n",__FUNCTION__);
1938 network->atheros_cap_exist = true;
1939 }
1940 else
1941 network->atheros_cap_exist = false;
1942
1943 if(info_element->len >= 3 &&
1944 info_element->data[0] == 0x00 &&
1945 info_element->data[1] == 0x40 &&
1946 info_element->data[2] == 0x96)
1947 {
1948 network->cisco_cap_exist = true;
1949 }
1950 else
1951 network->cisco_cap_exist = false;
1952 //added by amy for LEAP of cisco
1953 if(info_element->len > 4 &&
1954 info_element->data[0] == 0x00 &&
1955 info_element->data[1] == 0x40 &&
1956 info_element->data[2] == 0x96 &&
1957 info_element->data[3] == 0x01)
1958 {
1959 if(info_element->len == 6)
1960 {
1961 memcpy(network->CcxRmState, &info_element[4], 2);
1962 if(network->CcxRmState[0] != 0)
1963 {
1964 network->bCcxRmEnable = true;
1965 }
1966 else
1967 network->bCcxRmEnable = false;
1968 //
1969 // CCXv4 Table 59-1 MBSSID Masks.
1970 //
1971 network->MBssidMask = network->CcxRmState[1] & 0x07;
1972 if(network->MBssidMask != 0)
1973 {
1974 network->bMBssidValid = true;
1975 network->MBssidMask = 0xff << (network->MBssidMask);
1976 cpMacAddr(network->MBssid, network->bssid);
1977 network->MBssid[5] &= network->MBssidMask;
1978 }
1979 else
1980 {
1981 network->bMBssidValid = false;
1982 }
1983 }
1984 else
1985 {
1986 network->bCcxRmEnable = false;
1987 }
1988 }
1989 if(info_element->len > 4 &&
1990 info_element->data[0] == 0x00 &&
1991 info_element->data[1] == 0x40 &&
1992 info_element->data[2] == 0x96 &&
1993 info_element->data[3] == 0x03)
1994 {
1995 if(info_element->len == 5)
1996 {
1997 network->bWithCcxVerNum = true;
1998 network->BssCcxVerNumber = info_element->data[4];
1999 }
2000 else
2001 {
2002 network->bWithCcxVerNum = false;
2003 network->BssCcxVerNumber = 0;
2004 }
2005 }
2006 break;
2007
2008 case MFIE_TYPE_RSN:
2009 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2010 info_element->len);
2011 network->rsn_ie_len = min(info_element->len + 2,
2012 MAX_WPA_IE_LEN);
2013 memcpy(network->rsn_ie, info_element,
2014 network->rsn_ie_len);
2015 break;
2016
2017 //HT related element.
2018 case MFIE_TYPE_HT_CAP:
2019 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2020 info_element->len);
2021 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
2022 if(tmp_htcap_len != 0){
2023 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2024 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
2025 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
2026 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
2027
2028 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
2029 // windows driver will update WMM parameters each beacon received once connected
2030 // Linux driver is a bit different.
2031 network->bssht.bdSupportHT = true;
2032 }
2033 else
2034 network->bssht.bdSupportHT = false;
2035 break;
2036
2037
2038 case MFIE_TYPE_HT_INFO:
2039 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2040 info_element->len);
2041 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2042 if(tmp_htinfo_len){
2043 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2044 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2045 sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2046 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2047 }
2048 break;
2049
2050 case MFIE_TYPE_AIRONET:
2051 IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2052 info_element->len);
2053 if(info_element->len >IE_CISCO_FLAG_POSITION)
2054 {
2055 network->bWithAironetIE = true;
2056
2057 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
2058 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
2059 // by adding an Aironet element and setting one or both of the CKIP negotiation bits."
2060 if( (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC) ||
2061 (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK) )
2062 {
2063 network->bCkipSupported = true;
2064 }
2065 else
2066 {
2067 network->bCkipSupported = false;
2068 }
2069 }
2070 else
2071 {
2072 network->bWithAironetIE = false;
2073 network->bCkipSupported = false;
2074 }
2075 break;
2076 case MFIE_TYPE_QOS_PARAMETER:
2077 printk(KERN_ERR
2078 "QoS Error need to parse QOS_PARAMETER IE\n");
2079 break;
2080
2081 case MFIE_TYPE_COUNTRY:
2082 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2083 info_element->len);
2084 //printk("=====>Receive <%s> Country IE\n",network->ssid);
2085 ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
2086 break;
2087 /* TODO */
2088 default:
2089 IEEE80211_DEBUG_MGMT
2090 ("Unsupported info element: %s (%d)\n",
2091 get_info_element_string(info_element->id),
2092 info_element->id);
2093 break;
2094 }
2095
2096 length -= sizeof(*info_element) + info_element->len;
2097 info_element =
2098 (struct ieee80211_info_element *)&info_element->
2099 data[info_element->len];
2100 }
2101
2102 if(!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2103 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2104 {
2105 network->unknown_cap_exist = true;
2106 }
2107 else
2108 {
2109 network->unknown_cap_exist = false;
2110 }
2111 return 0;
2112 }
2113
ieee80211_SignalStrengthTranslate(u8 CurrSS)2114 static inline u8 ieee80211_SignalStrengthTranslate(
2115 u8 CurrSS
2116 )
2117 {
2118 u8 RetSS;
2119
2120 // Step 1. Scale mapping.
2121 if(CurrSS >= 71 && CurrSS <= 100)
2122 {
2123 RetSS = 90 + ((CurrSS - 70) / 3);
2124 }
2125 else if(CurrSS >= 41 && CurrSS <= 70)
2126 {
2127 RetSS = 78 + ((CurrSS - 40) / 3);
2128 }
2129 else if(CurrSS >= 31 && CurrSS <= 40)
2130 {
2131 RetSS = 66 + (CurrSS - 30);
2132 }
2133 else if(CurrSS >= 21 && CurrSS <= 30)
2134 {
2135 RetSS = 54 + (CurrSS - 20);
2136 }
2137 else if(CurrSS >= 5 && CurrSS <= 20)
2138 {
2139 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2140 }
2141 else if(CurrSS == 4)
2142 {
2143 RetSS = 36;
2144 }
2145 else if(CurrSS == 3)
2146 {
2147 RetSS = 27;
2148 }
2149 else if(CurrSS == 2)
2150 {
2151 RetSS = 18;
2152 }
2153 else if(CurrSS == 1)
2154 {
2155 RetSS = 9;
2156 }
2157 else
2158 {
2159 RetSS = CurrSS;
2160 }
2161 //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2162
2163 // Step 2. Smoothing.
2164
2165 //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2166
2167 return RetSS;
2168 }
2169
ieee80211_translate_todbm(u8 signal_strength_index)2170 long ieee80211_translate_todbm(u8 signal_strength_index )// 0-100 index.
2171 {
2172 long signal_power; // in dBm.
2173
2174 // Translate to dBm (x=0.5y-95).
2175 signal_power = (long)((signal_strength_index + 1) >> 1);
2176 signal_power -= 95;
2177
2178 return signal_power;
2179 }
2180
ieee80211_network_init(struct ieee80211_device * ieee,struct ieee80211_probe_response * beacon,struct ieee80211_network * network,struct ieee80211_rx_stats * stats)2181 static inline int ieee80211_network_init(
2182 struct ieee80211_device *ieee,
2183 struct ieee80211_probe_response *beacon,
2184 struct ieee80211_network *network,
2185 struct ieee80211_rx_stats *stats)
2186 {
2187 #ifdef CONFIG_IEEE80211_DEBUG
2188 //char rates_str[64];
2189 //char *p;
2190 #endif
2191
2192 network->qos_data.active = 0;
2193 network->qos_data.supported = 0;
2194 network->qos_data.param_count = 0;
2195 network->qos_data.old_param_count = 0;
2196
2197 /* Pull out fixed field data */
2198 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2199 network->capability = le16_to_cpu(beacon->capability);
2200 network->last_scanned = jiffies;
2201 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2202 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2203 network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
2204 /* Where to pull this? beacon->listen_interval;*/
2205 network->listen_interval = 0x0A;
2206 network->rates_len = network->rates_ex_len = 0;
2207 network->last_associate = 0;
2208 network->ssid_len = 0;
2209 network->flags = 0;
2210 network->atim_window = 0;
2211 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2212 0x3 : 0x0;
2213 network->berp_info_valid = false;
2214 network->broadcom_cap_exist = false;
2215 network->ralink_cap_exist = false;
2216 network->atheros_cap_exist = false;
2217 network->cisco_cap_exist = false;
2218 network->unknown_cap_exist = false;
2219 #ifdef THOMAS_TURBO
2220 network->Turbo_Enable = 0;
2221 #endif
2222 network->CountryIeLen = 0;
2223 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2224 //Initialize HT parameters
2225 //ieee80211_ht_initialize(&network->bssht);
2226 HTInitializeBssDesc(&network->bssht);
2227 if (stats->freq == IEEE80211_52GHZ_BAND) {
2228 /* for A band (No DS info) */
2229 network->channel = stats->received_channel;
2230 } else
2231 network->flags |= NETWORK_HAS_CCK;
2232
2233 network->wpa_ie_len = 0;
2234 network->rsn_ie_len = 0;
2235
2236 if (ieee80211_parse_info_param
2237 (ieee,beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2238 return 1;
2239
2240 network->mode = 0;
2241 if (stats->freq == IEEE80211_52GHZ_BAND)
2242 network->mode = IEEE_A;
2243 else {
2244 if (network->flags & NETWORK_HAS_OFDM)
2245 network->mode |= IEEE_G;
2246 if (network->flags & NETWORK_HAS_CCK)
2247 network->mode |= IEEE_B;
2248 }
2249
2250 if (network->mode == 0) {
2251 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
2252 "network.\n",
2253 escape_essid(network->ssid,
2254 network->ssid_len),
2255 network->bssid);
2256 return 1;
2257 }
2258
2259 if(network->bssht.bdSupportHT){
2260 if(network->mode == IEEE_A)
2261 network->mode = IEEE_N_5G;
2262 else if(network->mode & (IEEE_G | IEEE_B))
2263 network->mode = IEEE_N_24G;
2264 }
2265 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2266 network->flags |= NETWORK_EMPTY_ESSID;
2267
2268 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2269 //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2270 stats->noise = ieee80211_translate_todbm((u8)(100-stats->signal)) -25;
2271
2272 memcpy(&network->stats, stats, sizeof(network->stats));
2273
2274 return 0;
2275 }
2276
is_same_network(struct ieee80211_network * src,struct ieee80211_network * dst,struct ieee80211_device * ieee)2277 static inline int is_same_network(struct ieee80211_network *src,
2278 struct ieee80211_network *dst, struct ieee80211_device* ieee)
2279 {
2280 /* A network is only a duplicate if the channel, BSSID, ESSID
2281 * and the capability field (in particular IBSS and BSS) all match.
2282 * We treat all <hidden> with the same BSSID and channel
2283 * as one network */
2284 return //((src->ssid_len == dst->ssid_len) &&
2285 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2286 (src->channel == dst->channel) &&
2287 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2288 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2289 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2290 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2291 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2292 ((src->capability & WLAN_CAPABILITY_BSS) ==
2293 (dst->capability & WLAN_CAPABILITY_BSS)));
2294 }
2295
update_network(struct ieee80211_network * dst,struct ieee80211_network * src)2296 static inline void update_network(struct ieee80211_network *dst,
2297 struct ieee80211_network *src)
2298 {
2299 int qos_active;
2300 u8 old_param;
2301
2302 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2303 dst->capability = src->capability;
2304 memcpy(dst->rates, src->rates, src->rates_len);
2305 dst->rates_len = src->rates_len;
2306 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2307 dst->rates_ex_len = src->rates_ex_len;
2308 if(src->ssid_len > 0)
2309 {
2310 memset(dst->ssid, 0, dst->ssid_len);
2311 dst->ssid_len = src->ssid_len;
2312 memcpy(dst->ssid, src->ssid, src->ssid_len);
2313 }
2314 dst->mode = src->mode;
2315 dst->flags = src->flags;
2316 dst->time_stamp[0] = src->time_stamp[0];
2317 dst->time_stamp[1] = src->time_stamp[1];
2318 if (src->flags & NETWORK_HAS_ERP_VALUE)
2319 {
2320 dst->erp_value = src->erp_value;
2321 dst->berp_info_valid = src->berp_info_valid = true;
2322 }
2323 dst->beacon_interval = src->beacon_interval;
2324 dst->listen_interval = src->listen_interval;
2325 dst->atim_window = src->atim_window;
2326 dst->dtim_period = src->dtim_period;
2327 dst->dtim_data = src->dtim_data;
2328 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2329 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2330 memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2331
2332 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2333 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2334 dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2335 memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2336 dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2337 memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2338 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2339 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2340 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2341 dst->ralink_cap_exist = src->ralink_cap_exist;
2342 dst->atheros_cap_exist = src->atheros_cap_exist;
2343 dst->cisco_cap_exist = src->cisco_cap_exist;
2344 dst->unknown_cap_exist = src->unknown_cap_exist;
2345 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2346 dst->wpa_ie_len = src->wpa_ie_len;
2347 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2348 dst->rsn_ie_len = src->rsn_ie_len;
2349
2350 dst->last_scanned = jiffies;
2351 /* qos related parameters */
2352 //qos_active = src->qos_data.active;
2353 qos_active = dst->qos_data.active;
2354 //old_param = dst->qos_data.old_param_count;
2355 old_param = dst->qos_data.param_count;
2356 if(dst->flags & NETWORK_HAS_QOS_MASK)
2357 memcpy(&dst->qos_data, &src->qos_data,
2358 sizeof(struct ieee80211_qos_data));
2359 else {
2360 dst->qos_data.supported = src->qos_data.supported;
2361 dst->qos_data.param_count = src->qos_data.param_count;
2362 }
2363
2364 if(dst->qos_data.supported == 1) {
2365 dst->QoS_Enable = 1;
2366 if(dst->ssid_len)
2367 IEEE80211_DEBUG_QOS
2368 ("QoS the network %s is QoS supported\n",
2369 dst->ssid);
2370 else
2371 IEEE80211_DEBUG_QOS
2372 ("QoS the network is QoS supported\n");
2373 }
2374 dst->qos_data.active = qos_active;
2375 dst->qos_data.old_param_count = old_param;
2376
2377 /* dst->last_associate is not overwritten */
2378 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2379 if(src->wmm_param[0].ac_aci_acm_aifsn|| \
2380 src->wmm_param[1].ac_aci_acm_aifsn|| \
2381 src->wmm_param[2].ac_aci_acm_aifsn|| \
2382 src->wmm_param[3].ac_aci_acm_aifsn) {
2383 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2384 }
2385 //dst->QoS_Enable = src->QoS_Enable;
2386 #ifdef THOMAS_TURBO
2387 dst->Turbo_Enable = src->Turbo_Enable;
2388 #endif
2389
2390 dst->CountryIeLen = src->CountryIeLen;
2391 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2392
2393 //added by amy for LEAP
2394 dst->bWithAironetIE = src->bWithAironetIE;
2395 dst->bCkipSupported = src->bCkipSupported;
2396 memcpy(dst->CcxRmState,src->CcxRmState,2);
2397 dst->bCcxRmEnable = src->bCcxRmEnable;
2398 dst->MBssidMask = src->MBssidMask;
2399 dst->bMBssidValid = src->bMBssidValid;
2400 memcpy(dst->MBssid,src->MBssid,6);
2401 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2402 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2403
2404 }
2405
is_beacon(__le16 fc)2406 static inline int is_beacon(__le16 fc)
2407 {
2408 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2409 }
2410
ieee80211_process_probe_response(struct ieee80211_device * ieee,struct ieee80211_probe_response * beacon,struct ieee80211_rx_stats * stats)2411 static inline void ieee80211_process_probe_response(
2412 struct ieee80211_device *ieee,
2413 struct ieee80211_probe_response *beacon,
2414 struct ieee80211_rx_stats *stats)
2415 {
2416 struct ieee80211_network network;
2417 struct ieee80211_network *target;
2418 struct ieee80211_network *oldest = NULL;
2419 #ifdef CONFIG_IEEE80211_DEBUG
2420 struct ieee80211_info_element *info_element = &beacon->info_element[0];
2421 #endif
2422 unsigned long flags;
2423 short renew;
2424 //u8 wmm_info;
2425
2426 memset(&network, 0, sizeof(struct ieee80211_network));
2427 IEEE80211_DEBUG_SCAN(
2428 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2429 escape_essid(info_element->data, info_element->len),
2430 beacon->header.addr3,
2431 (beacon->capability & (1<<0xf)) ? '1' : '0',
2432 (beacon->capability & (1<<0xe)) ? '1' : '0',
2433 (beacon->capability & (1<<0xd)) ? '1' : '0',
2434 (beacon->capability & (1<<0xc)) ? '1' : '0',
2435 (beacon->capability & (1<<0xb)) ? '1' : '0',
2436 (beacon->capability & (1<<0xa)) ? '1' : '0',
2437 (beacon->capability & (1<<0x9)) ? '1' : '0',
2438 (beacon->capability & (1<<0x8)) ? '1' : '0',
2439 (beacon->capability & (1<<0x7)) ? '1' : '0',
2440 (beacon->capability & (1<<0x6)) ? '1' : '0',
2441 (beacon->capability & (1<<0x5)) ? '1' : '0',
2442 (beacon->capability & (1<<0x4)) ? '1' : '0',
2443 (beacon->capability & (1<<0x3)) ? '1' : '0',
2444 (beacon->capability & (1<<0x2)) ? '1' : '0',
2445 (beacon->capability & (1<<0x1)) ? '1' : '0',
2446 (beacon->capability & (1<<0x0)) ? '1' : '0');
2447
2448 if (ieee80211_network_init(ieee, beacon, &network, stats)) {
2449 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
2450 escape_essid(info_element->data,
2451 info_element->len),
2452 beacon->header.addr3,
2453 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2454 IEEE80211_STYPE_PROBE_RESP ?
2455 "PROBE RESPONSE" : "BEACON");
2456 return;
2457 }
2458
2459 // For Asus EeePc request,
2460 // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2461 // wireless adapter should follow the country code.
2462 // (2) If there is no any country code in beacon,
2463 // then wireless adapter should do active scan from ch1~11 and
2464 // passive scan from ch12~14
2465
2466 if( !IsLegalChannel(ieee, network.channel) )
2467 return;
2468 if(ieee->bGlobalDomain)
2469 {
2470 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP)
2471 {
2472 // Case 1: Country code
2473 if(IS_COUNTRY_IE_VALID(ieee) )
2474 {
2475 if( !IsLegalChannel(ieee, network.channel) )
2476 {
2477 printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
2478 return;
2479 }
2480 }
2481 // Case 2: No any country code.
2482 else
2483 {
2484 // Filter over channel ch12~14
2485 if(network.channel > 11)
2486 {
2487 printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
2488 return;
2489 }
2490 }
2491 }
2492 else
2493 {
2494 // Case 1: Country code
2495 if(IS_COUNTRY_IE_VALID(ieee) )
2496 {
2497 if( !IsLegalChannel(ieee, network.channel) )
2498 {
2499 printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel);
2500 return;
2501 }
2502 }
2503 // Case 2: No any country code.
2504 else
2505 {
2506 // Filter over channel ch12~14
2507 if(network.channel > 14)
2508 {
2509 printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel);
2510 return;
2511 }
2512 }
2513 }
2514 }
2515
2516 /* The network parsed correctly -- so now we scan our known networks
2517 * to see if we can find it in our list.
2518 *
2519 * NOTE: This search is definitely not optimized. Once its doing
2520 * the "right thing" we'll optimize it for efficiency if
2521 * necessary */
2522
2523 /* Search for this entry in the list and update it if it is
2524 * already there. */
2525
2526 spin_lock_irqsave(&ieee->lock, flags);
2527
2528 if(is_same_network(&ieee->current_network, &network, ieee)) {
2529 update_network(&ieee->current_network, &network);
2530 if((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2531 && ieee->current_network.berp_info_valid){
2532 if(ieee->current_network.erp_value& ERP_UseProtection)
2533 ieee->current_network.buseprotection = true;
2534 else
2535 ieee->current_network.buseprotection = false;
2536 }
2537 if(is_beacon(beacon->header.frame_ctl))
2538 {
2539 if(ieee->state == IEEE80211_LINKED)
2540 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2541 }
2542 else //hidden AP
2543 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2544 }
2545
2546 list_for_each_entry(target, &ieee->network_list, list) {
2547 if (is_same_network(target, &network, ieee))
2548 break;
2549 if ((oldest == NULL) ||
2550 (target->last_scanned < oldest->last_scanned))
2551 oldest = target;
2552 }
2553
2554 /* If we didn't find a match, then get a new network slot to initialize
2555 * with this beacon's information */
2556 if (&target->list == &ieee->network_list) {
2557 if (list_empty(&ieee->network_free_list)) {
2558 /* If there are no more slots, expire the oldest */
2559 list_del(&oldest->list);
2560 target = oldest;
2561 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
2562 "network list.\n",
2563 escape_essid(target->ssid,
2564 target->ssid_len),
2565 target->bssid);
2566 } else {
2567 /* Otherwise just pull from the free list */
2568 target = list_entry(ieee->network_free_list.next,
2569 struct ieee80211_network, list);
2570 list_del(ieee->network_free_list.next);
2571 }
2572
2573
2574 #ifdef CONFIG_IEEE80211_DEBUG
2575 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
2576 escape_essid(network.ssid,
2577 network.ssid_len),
2578 network.bssid,
2579 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2580 IEEE80211_STYPE_PROBE_RESP ?
2581 "PROBE RESPONSE" : "BEACON");
2582 #endif
2583 memcpy(target, &network, sizeof(*target));
2584 list_add_tail(&target->list, &ieee->network_list);
2585 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2586 ieee80211_softmac_new_net(ieee,&network);
2587 } else {
2588 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
2589 escape_essid(target->ssid,
2590 target->ssid_len),
2591 target->bssid,
2592 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2593 IEEE80211_STYPE_PROBE_RESP ?
2594 "PROBE RESPONSE" : "BEACON");
2595
2596 /* we have an entry and we are going to update it. But this entry may
2597 * be already expired. In this case we do the same as we found a new
2598 * net and call the new_net handler
2599 */
2600 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2601 //YJ,add,080819,for hidden ap
2602 if(is_beacon(beacon->header.frame_ctl) == 0)
2603 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
2604 //if(strncmp(network.ssid, "linksys-c",9) == 0)
2605 // printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
2606 if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2607 && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
2608 ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
2609 renew = 1;
2610 //YJ,add,080819,for hidden ap,end
2611
2612 update_network(target, &network);
2613 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2614 ieee80211_softmac_new_net(ieee,&network);
2615 }
2616
2617 spin_unlock_irqrestore(&ieee->lock, flags);
2618 if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, &network, ieee)&&\
2619 (ieee->state == IEEE80211_LINKED)) {
2620 if(ieee->handle_beacon != NULL) {
2621 ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
2622 }
2623 }
2624 }
2625
ieee80211_rx_mgt(struct ieee80211_device * ieee,struct ieee80211_hdr_4addr * header,struct ieee80211_rx_stats * stats)2626 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2627 struct ieee80211_hdr_4addr *header,
2628 struct ieee80211_rx_stats *stats)
2629 {
2630 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2631
2632 case IEEE80211_STYPE_BEACON:
2633 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2634 WLAN_FC_GET_STYPE(header->frame_ctl));
2635 IEEE80211_DEBUG_SCAN("Beacon\n");
2636 ieee80211_process_probe_response(
2637 ieee, (struct ieee80211_probe_response *)header, stats);
2638 break;
2639
2640 case IEEE80211_STYPE_PROBE_RESP:
2641 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2642 WLAN_FC_GET_STYPE(header->frame_ctl));
2643 IEEE80211_DEBUG_SCAN("Probe response\n");
2644 ieee80211_process_probe_response(
2645 ieee, (struct ieee80211_probe_response *)header, stats);
2646 break;
2647
2648 }
2649 }
2650
2651 EXPORT_SYMBOL(ieee80211_rx_mgt);
2652 EXPORT_SYMBOL(ieee80211_rx);
2653