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 <andrea.merello@gmail.com>
18
19 A special thanks goes to Realtek for their support !
20
21 ******************************************************************************/
22
23
24 #include <linux/compiler.h>
25 #include <linux/errno.h>
26 #include <linux/if_arp.h>
27 #include <linux/in6.h>
28 #include <linux/in.h>
29 #include <linux/ip.h>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/netdevice.h>
33 #include <linux/pci.h>
34 #include <linux/proc_fs.h>
35 #include <linux/skbuff.h>
36 #include <linux/slab.h>
37 #include <linux/tcp.h>
38 #include <linux/types.h>
39 #include <linux/wireless.h>
40 #include <linux/etherdevice.h>
41 #include <linux/uaccess.h>
42 #include <linux/ctype.h>
43
44 #include "ieee80211.h"
45 #include "dot11d.h"
ieee80211_monitor_rx(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats)46 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
47 struct sk_buff *skb,
48 struct ieee80211_rx_stats *rx_stats)
49 {
50 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *)skb->data;
51 u16 fc = le16_to_cpu(hdr->frame_ctl);
52
53 skb->dev = ieee->dev;
54 skb_reset_mac_header(skb);
55
56 skb_pull(skb, ieee80211_get_hdrlen(fc));
57 skb->pkt_type = PACKET_OTHERHOST;
58 skb->protocol = htons(ETH_P_80211_RAW);
59 memset(skb->cb, 0, sizeof(skb->cb));
60 netif_rx(skb);
61 }
62
63
64 /* Called only as a tasklet (software IRQ) */
65 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)66 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
67 unsigned int frag, u8 tid, u8 *src, u8 *dst)
68 {
69 struct ieee80211_frag_entry *entry;
70 int i;
71
72 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
73 entry = &ieee->frag_cache[tid][i];
74 if (entry->skb != NULL &&
75 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
76 IEEE80211_DEBUG_FRAG(
77 "expiring fragment cache entry "
78 "seq=%u last_frag=%u\n",
79 entry->seq, entry->last_frag);
80 dev_kfree_skb_any(entry->skb);
81 entry->skb = NULL;
82 }
83
84 if (entry->skb != NULL && entry->seq == seq &&
85 (entry->last_frag + 1 == frag || frag == -1) &&
86 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
87 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
88 return entry;
89 }
90
91 return NULL;
92 }
93
94 /* Called only as a tasklet (software IRQ) */
95 static struct sk_buff *
ieee80211_frag_cache_get(struct ieee80211_device * ieee,struct ieee80211_hdr_4addr * hdr)96 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
97 struct ieee80211_hdr_4addr *hdr)
98 {
99 struct sk_buff *skb = NULL;
100 u16 fc = le16_to_cpu(hdr->frame_ctl);
101 u16 sc = le16_to_cpu(hdr->seq_ctl);
102 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
103 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
104 struct ieee80211_frag_entry *entry;
105 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
106 struct ieee80211_hdr_4addrqos *hdr_4addrqos;
107 u8 tid;
108
109 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
110 hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
111 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
112 tid = UP2AC(tid);
113 tid ++;
114 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
115 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
116 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
117 tid = UP2AC(tid);
118 tid ++;
119 } else {
120 tid = 0;
121 }
122
123 if (frag == 0) {
124 /* Reserve enough space to fit maximum frame length */
125 skb = dev_alloc_skb(ieee->dev->mtu +
126 sizeof(struct ieee80211_hdr_4addr) +
127 8 /* LLC */ +
128 2 /* alignment */ +
129 8 /* WEP */ +
130 ETH_ALEN /* WDS */ +
131 (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
132 if (skb == NULL)
133 return NULL;
134
135 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
136 ieee->frag_next_idx[tid]++;
137 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
138 ieee->frag_next_idx[tid] = 0;
139
140 if (entry->skb != NULL)
141 dev_kfree_skb_any(entry->skb);
142
143 entry->first_frag_time = jiffies;
144 entry->seq = seq;
145 entry->last_frag = frag;
146 entry->skb = skb;
147 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
148 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
149 } else {
150 /* received a fragment of a frame for which the head fragment
151 * should have already been received */
152 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
153 hdr->addr1);
154 if (entry != NULL) {
155 entry->last_frag = frag;
156 skb = entry->skb;
157 }
158 }
159
160 return skb;
161 }
162
163
164 /* Called only as a tasklet (software IRQ) */
ieee80211_frag_cache_invalidate(struct ieee80211_device * ieee,struct ieee80211_hdr_4addr * hdr)165 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
166 struct ieee80211_hdr_4addr *hdr)
167 {
168 u16 fc = le16_to_cpu(hdr->frame_ctl);
169 u16 sc = le16_to_cpu(hdr->seq_ctl);
170 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
171 struct ieee80211_frag_entry *entry;
172 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
173 struct ieee80211_hdr_4addrqos *hdr_4addrqos;
174 u8 tid;
175
176 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
177 hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
178 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
179 tid = UP2AC(tid);
180 tid ++;
181 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
182 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
183 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
184 tid = UP2AC(tid);
185 tid ++;
186 } else {
187 tid = 0;
188 }
189
190 entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
191 hdr->addr1);
192
193 if (entry == NULL) {
194 IEEE80211_DEBUG_FRAG(
195 "could not invalidate fragment cache "
196 "entry (seq=%u)\n", seq);
197 return -1;
198 }
199
200 entry->skb = NULL;
201 return 0;
202 }
203
204
205
206 /* ieee80211_rx_frame_mgtmt
207 *
208 * Responsible for handling management control frames
209 *
210 * Called by ieee80211_rx */
211 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)212 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
213 struct ieee80211_rx_stats *rx_stats, u16 type,
214 u16 stype)
215 {
216 /* On the struct stats definition there is written that
217 * this is not mandatory.... but seems that the probe
218 * response parser uses it
219 */
220 struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)skb->data;
221
222 rx_stats->len = skb->len;
223 ieee80211_rx_mgt(ieee,(struct ieee80211_hdr_4addr *)skb->data,rx_stats);
224 /* if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) */
225 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN)))/* use ADDR1 to perform address matching for Management frames */
226 {
227 dev_kfree_skb_any(skb);
228 return 0;
229 }
230
231 ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
232
233 dev_kfree_skb_any(skb);
234
235 return 0;
236
237 #ifdef NOT_YET
238 if (ieee->iw_mode == IW_MODE_MASTER) {
239 printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
240 ieee->dev->name);
241 return 0;
242 /*
243 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
244 skb->data);*/
245 }
246
247 if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) {
248 if (stype == WLAN_FC_STYPE_BEACON &&
249 ieee->iw_mode == IW_MODE_MASTER) {
250 struct sk_buff *skb2;
251 /* Process beacon frames also in kernel driver to
252 * update STA(AP) table statistics */
253 skb2 = skb_clone(skb, GFP_ATOMIC);
254 if (skb2)
255 hostap_rx(skb2->dev, skb2, rx_stats);
256 }
257
258 /* send management frames to the user space daemon for
259 * processing */
260 ieee->apdevstats.rx_packets++;
261 ieee->apdevstats.rx_bytes += skb->len;
262 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
263 return 0;
264 }
265
266 if (ieee->iw_mode == IW_MODE_MASTER) {
267 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
268 printk(KERN_DEBUG "%s: unknown management frame "
269 "(type=0x%02x, stype=0x%02x) dropped\n",
270 skb->dev->name, type, stype);
271 return -1;
272 }
273
274 hostap_rx(skb->dev, skb, rx_stats);
275 return 0;
276 }
277
278 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
279 "received in non-Host AP mode\n", skb->dev->name);
280 return -1;
281 #endif
282 }
283
284
285
286 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
287 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
288 static unsigned char rfc1042_header[] =
289 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
290 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
291 static unsigned char bridge_tunnel_header[] =
292 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
293 /* No encapsulation header if EtherType < 0x600 (=length) */
294
295 /* Called by ieee80211_rx_frame_decrypt */
ieee80211_is_eapol_frame(struct ieee80211_device * ieee,struct sk_buff * skb,size_t hdrlen)296 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
297 struct sk_buff *skb, size_t hdrlen)
298 {
299 struct net_device *dev = ieee->dev;
300 u16 fc, ethertype;
301 struct ieee80211_hdr_4addr *hdr;
302 u8 *pos;
303
304 if (skb->len < 24)
305 return 0;
306
307 hdr = (struct ieee80211_hdr_4addr *) skb->data;
308 fc = le16_to_cpu(hdr->frame_ctl);
309
310 /* check that the frame is unicast frame to us */
311 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
312 IEEE80211_FCTL_TODS &&
313 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
314 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
315 /* ToDS frame with own addr BSSID and DA */
316 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
317 IEEE80211_FCTL_FROMDS &&
318 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
319 /* FromDS frame with own addr as DA */
320 } else
321 return 0;
322
323 if (skb->len < 24 + 8)
324 return 0;
325
326 /* check for port access entity Ethernet type */
327 // pos = skb->data + 24;
328 pos = skb->data + hdrlen;
329 ethertype = (pos[6] << 8) | pos[7];
330 if (ethertype == ETH_P_PAE)
331 return 1;
332
333 return 0;
334 }
335
336 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
337 static inline int
ieee80211_rx_frame_decrypt(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_crypt_data * crypt)338 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
339 struct ieee80211_crypt_data *crypt)
340 {
341 struct ieee80211_hdr_4addr *hdr;
342 int res, hdrlen;
343
344 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
345 return 0;
346 if (ieee->hwsec_active)
347 {
348 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
349 tcb_desc->bHwSec = 1;
350 }
351 hdr = (struct ieee80211_hdr_4addr *) skb->data;
352 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
353
354 if (ieee->tkip_countermeasures &&
355 strcmp(crypt->ops->name, "TKIP") == 0) {
356 if (net_ratelimit()) {
357 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
358 "received packet from %pM\n",
359 ieee->dev->name, hdr->addr2);
360 }
361 return -1;
362 }
363
364 atomic_inc(&crypt->refcnt);
365 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
366 atomic_dec(&crypt->refcnt);
367 if (res < 0) {
368 IEEE80211_DEBUG_DROP(
369 "decryption failed (SA=%pM"
370 ") res=%d\n", hdr->addr2, res);
371 if (res == -2)
372 IEEE80211_DEBUG_DROP("Decryption failed ICV "
373 "mismatch (key %d)\n",
374 skb->data[hdrlen + 3] >> 6);
375 ieee->ieee_stats.rx_discards_undecryptable++;
376 return -1;
377 }
378
379 return res;
380 }
381
382
383 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
384 static inline int
ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device * ieee,struct sk_buff * skb,int keyidx,struct ieee80211_crypt_data * crypt)385 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb,
386 int keyidx, struct ieee80211_crypt_data *crypt)
387 {
388 struct ieee80211_hdr_4addr *hdr;
389 int res, hdrlen;
390
391 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
392 return 0;
393 if (ieee->hwsec_active)
394 {
395 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
396 tcb_desc->bHwSec = 1;
397 }
398
399 hdr = (struct ieee80211_hdr_4addr *) skb->data;
400 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
401
402 atomic_inc(&crypt->refcnt);
403 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
404 atomic_dec(&crypt->refcnt);
405 if (res < 0) {
406 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
407 " (SA=%pM keyidx=%d)\n",
408 ieee->dev->name, hdr->addr2, keyidx);
409 return -1;
410 }
411
412 return 0;
413 }
414
415
416 /* this function is stolen from ipw2200 driver*/
417 #define IEEE_PACKET_RETRY_TIME (5*HZ)
is_duplicate_packet(struct ieee80211_device * ieee,struct ieee80211_hdr_4addr * header)418 static int is_duplicate_packet(struct ieee80211_device *ieee,
419 struct ieee80211_hdr_4addr *header)
420 {
421 u16 fc = le16_to_cpu(header->frame_ctl);
422 u16 sc = le16_to_cpu(header->seq_ctl);
423 u16 seq = WLAN_GET_SEQ_SEQ(sc);
424 u16 frag = WLAN_GET_SEQ_FRAG(sc);
425 u16 *last_seq, *last_frag;
426 unsigned long *last_time;
427 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
428 struct ieee80211_hdr_4addrqos *hdr_4addrqos;
429 u8 tid;
430
431
432 //TO2DS and QoS
433 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
434 hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header;
435 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
436 tid = UP2AC(tid);
437 tid ++;
438 } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
439 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)header;
440 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
441 tid = UP2AC(tid);
442 tid ++;
443 } else { // no QoS
444 tid = 0;
445 }
446
447 switch (ieee->iw_mode) {
448 case IW_MODE_ADHOC:
449 {
450 struct list_head *p;
451 struct ieee_ibss_seq *entry = NULL;
452 u8 *mac = header->addr2;
453 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
454
455 list_for_each(p, &ieee->ibss_mac_hash[index]) {
456 entry = list_entry(p, struct ieee_ibss_seq, list);
457 if (!memcmp(entry->mac, mac, ETH_ALEN))
458 break;
459 }
460 // if (memcmp(entry->mac, mac, ETH_ALEN)){
461 if (p == &ieee->ibss_mac_hash[index]) {
462 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
463 if (!entry) {
464 printk(KERN_WARNING "Cannot malloc new mac entry\n");
465 return 0;
466 }
467 memcpy(entry->mac, mac, ETH_ALEN);
468 entry->seq_num[tid] = seq;
469 entry->frag_num[tid] = frag;
470 entry->packet_time[tid] = jiffies;
471 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
472 return 0;
473 }
474 last_seq = &entry->seq_num[tid];
475 last_frag = &entry->frag_num[tid];
476 last_time = &entry->packet_time[tid];
477 break;
478 }
479
480 case IW_MODE_INFRA:
481 last_seq = &ieee->last_rxseq_num[tid];
482 last_frag = &ieee->last_rxfrag_num[tid];
483 last_time = &ieee->last_packet_time[tid];
484
485 break;
486 default:
487 return 0;
488 }
489
490 // if(tid != 0) {
491 // printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
492 // }
493 if ((*last_seq == seq) &&
494 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
495 if (*last_frag == frag){
496 //printk(KERN_WARNING "[1] go drop!\n");
497 goto drop;
498
499 }
500 if (*last_frag + 1 != frag)
501 /* out-of-order fragment */
502 //printk(KERN_WARNING "[2] go drop!\n");
503 goto drop;
504 } else
505 *last_seq = seq;
506
507 *last_frag = frag;
508 *last_time = jiffies;
509 return 0;
510
511 drop:
512 // BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
513 // printk("DUP\n");
514
515 return 1;
516 }
517
AddReorderEntry(PRX_TS_RECORD pTS,PRX_REORDER_ENTRY pReorderEntry)518 static bool AddReorderEntry(PRX_TS_RECORD pTS, PRX_REORDER_ENTRY pReorderEntry)
519 {
520 struct list_head *pList = &pTS->RxPendingPktList;
521 while(pList->next != &pTS->RxPendingPktList)
522 {
523 if( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
524 {
525 pList = pList->next;
526 }
527 else if( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
528 {
529 return false;
530 }
531 else
532 {
533 break;
534 }
535 }
536 pReorderEntry->List.next = pList->next;
537 pReorderEntry->List.next->prev = &pReorderEntry->List;
538 pReorderEntry->List.prev = pList;
539 pList->next = &pReorderEntry->List;
540
541 return true;
542 }
543
ieee80211_indicate_packets(struct ieee80211_device * ieee,struct ieee80211_rxb ** prxbIndicateArray,u8 index)544 void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb **prxbIndicateArray,u8 index)
545 {
546 u8 i = 0 , j=0;
547 u16 ethertype;
548 // if(index > 1)
549 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__func__,index);
550 for(j = 0; j<index; j++)
551 {
552 //added by amy for reorder
553 struct ieee80211_rxb *prxb = prxbIndicateArray[j];
554 for(i = 0; i<prxb->nr_subframes; i++) {
555 struct sk_buff *sub_skb = prxb->subframes[i];
556
557 /* convert hdr + possible LLC headers into Ethernet header */
558 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
559 if (sub_skb->len >= 8 &&
560 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
561 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
562 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
563 /* remove RFC1042 or Bridge-Tunnel encapsulation and
564 * replace EtherType */
565 skb_pull(sub_skb, SNAP_SIZE);
566 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
567 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
568 } else {
569 u16 len;
570 /* Leave Ethernet header part of hdr and full payload */
571 len = htons(sub_skb->len);
572 memcpy(skb_push(sub_skb, 2), &len, 2);
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 }
576 //stats->rx_packets++;
577 //stats->rx_bytes += sub_skb->len;
578
579 /* Indicat the packets to upper layer */
580 if (sub_skb) {
581 //printk("0skb_len(%d)\n", skb->len);
582 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
583 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
584 sub_skb->dev = ieee->dev;
585 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
586 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
587 ieee->last_rx_ps_time = jiffies;
588 //printk("1skb_len(%d)\n", skb->len);
589 netif_rx(sub_skb);
590 }
591 }
592 kfree(prxb);
593 prxb = NULL;
594 }
595 }
596
597
RxReorderIndicatePacket(struct ieee80211_device * ieee,struct ieee80211_rxb * prxb,PRX_TS_RECORD pTS,u16 SeqNum)598 static void RxReorderIndicatePacket(struct ieee80211_device *ieee,
599 struct ieee80211_rxb *prxb,
600 PRX_TS_RECORD pTS, u16 SeqNum)
601 {
602 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
603 PRX_REORDER_ENTRY pReorderEntry = NULL;
604 struct ieee80211_rxb *prxbIndicateArray[REORDER_WIN_SIZE];
605 u8 WinSize = pHTInfo->RxReorderWinSize;
606 u16 WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
607 u8 index = 0;
608 bool bMatchWinStart = false, bPktInBuf = false;
609 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__func__,SeqNum,pTS->RxIndicateSeq,WinSize);
610 /* Rx Reorder initialize condition.*/
611 if (pTS->RxIndicateSeq == 0xffff) {
612 pTS->RxIndicateSeq = SeqNum;
613 }
614
615 /* Drop out the packet which SeqNum is smaller than WinStart */
616 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
617 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
618 pTS->RxIndicateSeq, SeqNum);
619 pHTInfo->RxReorderDropCounter++;
620 {
621 int i;
622 for(i =0; i < prxb->nr_subframes; i++) {
623 dev_kfree_skb(prxb->subframes[i]);
624 }
625 kfree(prxb);
626 prxb = NULL;
627 }
628 return;
629 }
630
631 /*
632 * Sliding window manipulation. Conditions includes:
633 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
634 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
635 */
636 if(SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
637 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
638 bMatchWinStart = true;
639 } else if(SN_LESS(WinEnd, SeqNum)) {
640 if(SeqNum >= (WinSize - 1)) {
641 pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
642 } else {
643 pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
644 }
645 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
646 }
647
648 /*
649 * Indication process.
650 * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
651 * with the SeqNum smaller than latest WinStart and buffer other packets.
652 */
653 /* For Rx Reorder condition:
654 * 1. All packets with SeqNum smaller than WinStart => Indicate
655 * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
656 */
657 if(bMatchWinStart) {
658 /* Current packet is going to be indicated.*/
659 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
660 pTS->RxIndicateSeq, SeqNum);
661 prxbIndicateArray[0] = prxb;
662 // printk("========================>%s(): SeqNum is %d\n",__func__,SeqNum);
663 index = 1;
664 } else {
665 /* Current packet is going to be inserted into pending list.*/
666 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to ordered list\n",__func__);
667 if(!list_empty(&ieee->RxReorder_Unused_List)) {
668 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List);
669 list_del_init(&pReorderEntry->List);
670
671 /* Make a reorder entry and insert into a the packet list.*/
672 pReorderEntry->SeqNum = SeqNum;
673 pReorderEntry->prxb = prxb;
674 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
675
676 if(!AddReorderEntry(pTS, pReorderEntry)) {
677 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
678 __func__, pTS->RxIndicateSeq, SeqNum);
679 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
680 {
681 int i;
682 for(i =0; i < prxb->nr_subframes; i++) {
683 dev_kfree_skb(prxb->subframes[i]);
684 }
685 kfree(prxb);
686 prxb = NULL;
687 }
688 } else {
689 IEEE80211_DEBUG(IEEE80211_DL_REORDER,
690 "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
691 }
692 }
693 else {
694 /*
695 * Packets are dropped if there is not enough reorder entries.
696 * This part shall be modified!! We can just indicate all the
697 * packets in buffer and get reorder entries.
698 */
699 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
700 {
701 int i;
702 for(i =0; i < prxb->nr_subframes; i++) {
703 dev_kfree_skb(prxb->subframes[i]);
704 }
705 kfree(prxb);
706 prxb = NULL;
707 }
708 }
709 }
710
711 /* Check if there is any packet need indicate.*/
712 while(!list_empty(&pTS->RxPendingPktList)) {
713 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): start RREORDER indicate\n",__func__);
714 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List);
715 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
716 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
717 {
718 /* This protect buffer from overflow. */
719 if (index >= REORDER_WIN_SIZE) {
720 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
721 bPktInBuf = true;
722 break;
723 }
724
725 list_del_init(&pReorderEntry->List);
726
727 if(SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
728 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
729
730 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packets indication!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
731 prxbIndicateArray[index] = pReorderEntry->prxb;
732 // printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
733 index++;
734
735 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
736 } else {
737 bPktInBuf = true;
738 break;
739 }
740 }
741
742 /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
743 if (index>0) {
744 // Cancel previous pending timer.
745 // del_timer_sync(&pTS->RxPktPendingTimer);
746 pTS->RxTimeoutIndicateSeq = 0xffff;
747
748 // Indicate packets
749 if(index>REORDER_WIN_SIZE){
750 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer buffer full!! \n");
751 return;
752 }
753 ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
754 }
755
756 if (bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
757 // Set new pending timer.
758 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): SET rx timeout timer\n", __func__);
759 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
760 if(timer_pending(&pTS->RxPktPendingTimer))
761 del_timer_sync(&pTS->RxPktPendingTimer);
762 pTS->RxPktPendingTimer.expires = jiffies + MSECS(pHTInfo->RxReorderPendingTime);
763 add_timer(&pTS->RxPktPendingTimer);
764 }
765 }
766
parse_subframe(struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats,struct ieee80211_rxb * rxb,u8 * src,u8 * dst)767 static u8 parse_subframe(struct sk_buff *skb,
768 struct ieee80211_rx_stats *rx_stats,
769 struct ieee80211_rxb *rxb, u8 *src, u8 *dst)
770 {
771 struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)skb->data;
772 u16 fc = le16_to_cpu(hdr->frame_ctl);
773
774 u16 LLCOffset= sizeof(struct ieee80211_hdr_3addr);
775 u16 ChkLength;
776 bool bIsAggregateFrame = false;
777 u16 nSubframe_Length;
778 u8 nPadding_Length = 0;
779 u16 SeqNum=0;
780
781 struct sk_buff *sub_skb;
782 u8 *data_ptr;
783 /* just for debug purpose */
784 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
785
786 if ((IEEE80211_QOS_HAS_SEQ(fc))&&\
787 (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
788 bIsAggregateFrame = true;
789 }
790
791 if (IEEE80211_QOS_HAS_SEQ(fc)) {
792 LLCOffset += 2;
793 }
794
795 if (rx_stats->bContainHTC) {
796 LLCOffset += sHTCLng;
797 }
798 //printk("ChkLength = %d\n", LLCOffset);
799 // Null packet, don't indicate it to upper layer
800 ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
801
802 if (skb->len <= ChkLength)
803 return 0;
804
805 skb_pull(skb, LLCOffset);
806
807 if(!bIsAggregateFrame) {
808 rxb->nr_subframes = 1;
809 #ifdef JOHN_NOCPY
810 rxb->subframes[0] = skb;
811 #else
812 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
813 #endif
814
815 memcpy(rxb->src,src,ETH_ALEN);
816 memcpy(rxb->dst,dst,ETH_ALEN);
817 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
818 return 1;
819 } else {
820 rxb->nr_subframes = 0;
821 memcpy(rxb->src,src,ETH_ALEN);
822 memcpy(rxb->dst,dst,ETH_ALEN);
823 while(skb->len > ETHERNET_HEADER_SIZE) {
824 /* Offset 12 denote 2 mac address */
825 nSubframe_Length = *((u16 *)(skb->data + 12));
826 //==m==>change the length order
827 nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
828
829 if (skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
830 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
831 __func__, rxb->nr_subframes);
832 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__func__, nSubframe_Length);
833 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
834 printk("The Packet SeqNum is %d\n",SeqNum);
835 return 0;
836 }
837
838 /* move the data point to data content */
839 skb_pull(skb, ETHERNET_HEADER_SIZE);
840
841 #ifdef JOHN_NOCPY
842 sub_skb = skb_clone(skb, GFP_ATOMIC);
843 sub_skb->len = nSubframe_Length;
844 sub_skb->tail = sub_skb->data + nSubframe_Length;
845 #else
846 /* Allocate new skb for releasing to upper layer */
847 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
848 if (!sub_skb)
849 return 0;
850 skb_reserve(sub_skb, 12);
851 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
852 memcpy(data_ptr, skb->data, nSubframe_Length);
853 #endif
854 rxb->subframes[rxb->nr_subframes++] = sub_skb;
855 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
856 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
857 break;
858 }
859 skb_pull(skb, nSubframe_Length);
860
861 if (skb->len != 0) {
862 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
863 if (nPadding_Length == 4) {
864 nPadding_Length = 0;
865 }
866
867 if (skb->len < nPadding_Length) {
868 return 0;
869 }
870
871 skb_pull(skb, nPadding_Length);
872 }
873 }
874 #ifdef JOHN_NOCPY
875 dev_kfree_skb(skb);
876 #endif
877 //{just for debug added by david
878 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
879 //}
880 return rxb->nr_subframes;
881 }
882 }
883
884 /* All received frames are sent to this function. @skb contains the frame in
885 * IEEE 802.11 format, i.e., in the format it was sent over air.
886 * 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)887 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
888 struct ieee80211_rx_stats *rx_stats)
889 {
890 struct net_device *dev = ieee->dev;
891 struct ieee80211_hdr_4addr *hdr;
892 //struct ieee80211_hdr_3addrqos *hdr;
893
894 size_t hdrlen;
895 u16 fc, type, stype, sc;
896 struct net_device_stats *stats;
897 unsigned int frag;
898 u8 *payload;
899 u16 ethertype;
900 //added by amy for reorder
901 u8 TID = 0;
902 u16 SeqNum = 0;
903 PRX_TS_RECORD pTS = NULL;
904 //bool bIsAggregateFrame = false;
905 //added by amy for reorder
906 #ifdef NOT_YET
907 struct net_device *wds = NULL;
908 struct sk_buff *skb2 = NULL;
909 struct net_device *wds = NULL;
910 int frame_authorized = 0;
911 int from_assoc_ap = 0;
912 void *sta = NULL;
913 #endif
914 // u16 qos_ctl = 0;
915 u8 dst[ETH_ALEN];
916 u8 src[ETH_ALEN];
917 u8 bssid[ETH_ALEN];
918 struct ieee80211_crypt_data *crypt = NULL;
919 int keyidx = 0;
920
921 int i;
922 struct ieee80211_rxb *rxb = NULL;
923 // cheat the the hdr type
924 hdr = (struct ieee80211_hdr_4addr *)skb->data;
925 stats = &ieee->stats;
926
927 if (skb->len < 10) {
928 printk(KERN_INFO "%s: SKB length < 10\n",
929 dev->name);
930 goto rx_dropped;
931 }
932
933 fc = le16_to_cpu(hdr->frame_ctl);
934 type = WLAN_FC_GET_TYPE(fc);
935 stype = WLAN_FC_GET_STYPE(fc);
936 sc = le16_to_cpu(hdr->seq_ctl);
937
938 frag = WLAN_GET_SEQ_FRAG(sc);
939 hdrlen = ieee80211_get_hdrlen(fc);
940
941 if (HTCCheck(ieee, skb->data))
942 {
943 if(net_ratelimit())
944 printk("find HTCControl\n");
945 hdrlen += 4;
946 rx_stats->bContainHTC = true;
947 }
948
949 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
950 #ifdef NOT_YET
951 /* Put this code here so that we avoid duplicating it in all
952 * Rx paths. - Jean II */
953 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
954 /* If spy monitoring on */
955 if (iface->spy_data.spy_number > 0) {
956 struct iw_quality wstats;
957 wstats.level = rx_stats->rssi;
958 wstats.noise = rx_stats->noise;
959 wstats.updated = 6; /* No qual value */
960 /* Update spy records */
961 wireless_spy_update(dev, hdr->addr2, &wstats);
962 }
963 #endif /* IW_WIRELESS_SPY */
964 hostap_update_rx_stats(local->ap, hdr, rx_stats);
965 #endif
966
967 if (ieee->iw_mode == IW_MODE_MONITOR) {
968 ieee80211_monitor_rx(ieee, skb, rx_stats);
969 stats->rx_packets++;
970 stats->rx_bytes += skb->len;
971 return 1;
972 }
973
974 if (ieee->host_decrypt) {
975 int idx = 0;
976 if (skb->len >= hdrlen + 3)
977 idx = skb->data[hdrlen + 3] >> 6;
978 crypt = ieee->crypt[idx];
979 #ifdef NOT_YET
980 sta = NULL;
981
982 /* Use station specific key to override default keys if the
983 * receiver address is a unicast address ("individual RA"). If
984 * bcrx_sta_key parameter is set, station specific key is used
985 * even with broad/multicast targets (this is against IEEE
986 * 802.11, but makes it easier to use different keys with
987 * stations that do not support WEP key mapping). */
988
989 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
990 (void) hostap_handle_sta_crypto(local, hdr, &crypt,
991 &sta);
992 #endif
993
994 /* allow NULL decrypt to indicate an station specific override
995 * for default encryption */
996 if (crypt && (crypt->ops == NULL ||
997 crypt->ops->decrypt_mpdu == NULL))
998 crypt = NULL;
999
1000 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
1001 /* This seems to be triggered by some (multicast?)
1002 * frames from other than current BSS, so just drop the
1003 * frames silently instead of filling system log with
1004 * these reports. */
1005 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
1006 " (SA=%pM)\n",
1007 hdr->addr2);
1008 ieee->ieee_stats.rx_discards_undecryptable++;
1009 goto rx_dropped;
1010 }
1011 }
1012
1013 if (skb->len < IEEE80211_DATA_HDR3_LEN)
1014 goto rx_dropped;
1015
1016 // if QoS enabled, should check the sequence for each of the AC
1017 if( (ieee->pHTInfo->bCurRxReorderEnable == false) || !ieee->current_network.qos_data.active|| !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)){
1018 if (is_duplicate_packet(ieee, hdr))
1019 goto rx_dropped;
1020
1021 }
1022 else
1023 {
1024 PRX_TS_RECORD pRxTS = NULL;
1025 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid);
1026 if(GetTs(
1027 ieee,
1028 (PTS_COMMON_INFO *) &pRxTS,
1029 hdr->addr2,
1030 (u8)Frame_QoSTID((u8 *)(skb->data)),
1031 RX_DIR,
1032 true))
1033 {
1034
1035 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->RxLastFragNum is %d,frag is %d,pRxTS->RxLastSeqNum is %d,seq is %d\n",__func__,pRxTS->RxLastFragNum,frag,pRxTS->RxLastSeqNum,WLAN_GET_SEQ_SEQ(sc));
1036 if ((fc & (1<<11)) &&
1037 (frag == pRxTS->RxLastFragNum) &&
1038 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) {
1039 goto rx_dropped;
1040 }
1041 else
1042 {
1043 pRxTS->RxLastFragNum = frag;
1044 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
1045 }
1046 }
1047 else
1048 {
1049 IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n",__func__);
1050 goto rx_dropped;
1051 }
1052 }
1053 if (type == IEEE80211_FTYPE_MGMT) {
1054
1055
1056 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1057 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1058 goto rx_dropped;
1059 else
1060 goto rx_exit;
1061 }
1062
1063 /* Data frame - extract src/dst addresses */
1064 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1065 case IEEE80211_FCTL_FROMDS:
1066 memcpy(dst, hdr->addr1, ETH_ALEN);
1067 memcpy(src, hdr->addr3, ETH_ALEN);
1068 memcpy(bssid, hdr->addr2, ETH_ALEN);
1069 break;
1070 case IEEE80211_FCTL_TODS:
1071 memcpy(dst, hdr->addr3, ETH_ALEN);
1072 memcpy(src, hdr->addr2, ETH_ALEN);
1073 memcpy(bssid, hdr->addr1, ETH_ALEN);
1074 break;
1075 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1076 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1077 goto rx_dropped;
1078 memcpy(dst, hdr->addr3, ETH_ALEN);
1079 memcpy(src, hdr->addr4, ETH_ALEN);
1080 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1081 break;
1082 case 0:
1083 memcpy(dst, hdr->addr1, ETH_ALEN);
1084 memcpy(src, hdr->addr2, ETH_ALEN);
1085 memcpy(bssid, hdr->addr3, ETH_ALEN);
1086 break;
1087 }
1088
1089 #ifdef NOT_YET
1090 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
1091 goto rx_dropped;
1092 if (wds) {
1093 skb->dev = dev = wds;
1094 stats = hostap_get_stats(dev);
1095 }
1096
1097 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1098 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
1099 ieee->stadev &&
1100 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
1101 /* Frame from BSSID of the AP for which we are a client */
1102 skb->dev = dev = ieee->stadev;
1103 stats = hostap_get_stats(dev);
1104 from_assoc_ap = 1;
1105 }
1106 #endif
1107
1108 dev->last_rx = jiffies;
1109
1110 #ifdef NOT_YET
1111 if ((ieee->iw_mode == IW_MODE_MASTER ||
1112 ieee->iw_mode == IW_MODE_REPEAT) &&
1113 !from_assoc_ap) {
1114 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
1115 wds != NULL)) {
1116 case AP_RX_CONTINUE_NOT_AUTHORIZED:
1117 frame_authorized = 0;
1118 break;
1119 case AP_RX_CONTINUE:
1120 frame_authorized = 1;
1121 break;
1122 case AP_RX_DROP:
1123 goto rx_dropped;
1124 case AP_RX_EXIT:
1125 goto rx_exit;
1126 }
1127 }
1128 #endif
1129 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1130 /* Nullfunc frames may have PS-bit set, so they must be passed to
1131 * hostap_handle_sta_rx() before being dropped here. */
1132 if (stype != IEEE80211_STYPE_DATA &&
1133 stype != IEEE80211_STYPE_DATA_CFACK &&
1134 stype != IEEE80211_STYPE_DATA_CFPOLL &&
1135 stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
1136 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1137 ) {
1138 if (stype != IEEE80211_STYPE_NULLFUNC)
1139 IEEE80211_DEBUG_DROP(
1140 "RX: dropped data frame "
1141 "with no data (type=0x%02x, "
1142 "subtype=0x%02x, len=%d)\n",
1143 type, stype, skb->len);
1144 goto rx_dropped;
1145 }
1146 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1147 goto rx_dropped;
1148
1149 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1150
1151 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1152 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
1153 {
1154 printk("decrypt frame error\n");
1155 goto rx_dropped;
1156 }
1157
1158
1159 hdr = (struct ieee80211_hdr_4addr *) skb->data;
1160
1161 /* skb: hdr + (possibly fragmented) plaintext payload */
1162 // PR: FIXME: hostap has additional conditions in the "if" below:
1163 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1164 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1165 int flen;
1166 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1167 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1168
1169 if (!frag_skb) {
1170 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1171 "Rx cannot get skb from fragment "
1172 "cache (morefrag=%d seq=%u frag=%u)\n",
1173 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1174 WLAN_GET_SEQ_SEQ(sc), frag);
1175 goto rx_dropped;
1176 }
1177 flen = skb->len;
1178 if (frag != 0)
1179 flen -= hdrlen;
1180
1181 if (frag_skb->tail + flen > frag_skb->end) {
1182 printk(KERN_WARNING "%s: host decrypted and "
1183 "reassembled frame did not fit skb\n",
1184 dev->name);
1185 ieee80211_frag_cache_invalidate(ieee, hdr);
1186 goto rx_dropped;
1187 }
1188
1189 if (frag == 0) {
1190 /* copy first fragment (including full headers) into
1191 * beginning of the fragment cache skb */
1192 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1193 } else {
1194 /* append frame payload to the end of the fragment
1195 * cache skb */
1196 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1197 flen);
1198 }
1199 dev_kfree_skb_any(skb);
1200 skb = NULL;
1201
1202 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1203 /* more fragments expected - leave the skb in fragment
1204 * cache for now; it will be delivered to upper layers
1205 * after all fragments have been received */
1206 goto rx_exit;
1207 }
1208
1209 /* this was the last fragment and the frame will be
1210 * delivered, so remove skb from fragment cache */
1211 skb = frag_skb;
1212 hdr = (struct ieee80211_hdr_4addr *) skb->data;
1213 ieee80211_frag_cache_invalidate(ieee, hdr);
1214 }
1215
1216 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1217 * encrypted/authenticated */
1218 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1219 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1220 {
1221 printk("==>decrypt msdu error\n");
1222 goto rx_dropped;
1223 }
1224
1225 //added by amy for AP roaming
1226 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1227 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1228
1229 hdr = (struct ieee80211_hdr_4addr *) skb->data;
1230 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1231 if (/*ieee->ieee802_1x &&*/
1232 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1233
1234 #ifdef CONFIG_IEEE80211_DEBUG
1235 /* pass unencrypted EAPOL frames even if encryption is
1236 * configured */
1237 struct eapol *eap = (struct eapol *)(skb->data +
1238 24);
1239 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1240 eap_get_type(eap->type));
1241 #endif
1242 } else {
1243 IEEE80211_DEBUG_DROP(
1244 "encryption configured, but RX "
1245 "frame not encrypted (SA=%pM)\n",
1246 hdr->addr2);
1247 goto rx_dropped;
1248 }
1249 }
1250
1251 #ifdef CONFIG_IEEE80211_DEBUG
1252 if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1253 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1254 struct eapol *eap = (struct eapol *)(skb->data +
1255 24);
1256 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1257 eap_get_type(eap->type));
1258 }
1259 #endif
1260
1261 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1262 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1263 IEEE80211_DEBUG_DROP(
1264 "dropped unencrypted RX data "
1265 "frame from %pM"
1266 " (drop_unencrypted=1)\n",
1267 hdr->addr2);
1268 goto rx_dropped;
1269 }
1270 /*
1271 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1272 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1273 }
1274 */
1275 //added by amy for reorder
1276 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1277 && !is_multicast_ether_addr(hdr->addr1))
1278 {
1279 TID = Frame_QoSTID(skb->data);
1280 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1281 GetTs(ieee,(PTS_COMMON_INFO *) &pTS,hdr->addr2,TID,RX_DIR,true);
1282 if (TID !=0 && TID !=3)
1283 {
1284 ieee->bis_any_nonbepkts = true;
1285 }
1286 }
1287 //added by amy for reorder
1288 /* skb: hdr + (possible reassembled) full plaintext payload */
1289 payload = skb->data + hdrlen;
1290 //ethertype = (payload[6] << 8) | payload[7];
1291 rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC);
1292 if (rxb == NULL)
1293 {
1294 IEEE80211_DEBUG(IEEE80211_DL_ERR,"%s(): kmalloc rxb error\n",__func__);
1295 goto rx_dropped;
1296 }
1297 /* to parse amsdu packets */
1298 /* qos data packets & reserved bit is 1 */
1299 if (parse_subframe(skb, rx_stats, rxb, src, dst) == 0) {
1300 /* only to free rxb, and not submit the packets to upper layer */
1301 for(i =0; i < rxb->nr_subframes; i++) {
1302 dev_kfree_skb(rxb->subframes[i]);
1303 }
1304 kfree(rxb);
1305 rxb = NULL;
1306 goto rx_dropped;
1307 }
1308
1309 //added by amy for reorder
1310 if(ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL){
1311 //added by amy for reorder
1312 for(i = 0; i<rxb->nr_subframes; i++) {
1313 struct sk_buff *sub_skb = rxb->subframes[i];
1314
1315 if (sub_skb) {
1316 /* convert hdr + possible LLC headers into Ethernet header */
1317 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1318 if (sub_skb->len >= 8 &&
1319 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1320 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1321 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1322 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1323 * replace EtherType */
1324 skb_pull(sub_skb, SNAP_SIZE);
1325 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1326 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1327 } else {
1328 u16 len;
1329 /* Leave Ethernet header part of hdr and full payload */
1330 len = htons(sub_skb->len);
1331 memcpy(skb_push(sub_skb, 2), &len, 2);
1332 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1333 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1334 }
1335
1336 stats->rx_packets++;
1337 stats->rx_bytes += sub_skb->len;
1338 if (is_multicast_ether_addr(dst)) {
1339 stats->multicast++;
1340 }
1341
1342 /* Indicat the packets to upper layer */
1343 //printk("0skb_len(%d)\n", skb->len);
1344 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1345 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1346 sub_skb->dev = dev;
1347 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1348 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
1349 ieee->last_rx_ps_time = jiffies;
1350 //printk("1skb_len(%d)\n", skb->len);
1351 netif_rx(sub_skb);
1352 }
1353 }
1354 kfree(rxb);
1355 rxb = NULL;
1356
1357 }
1358 else
1359 {
1360 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__func__);
1361 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1362 }
1363 #ifndef JOHN_NOCPY
1364 dev_kfree_skb(skb);
1365 #endif
1366
1367 rx_exit:
1368 #ifdef NOT_YET
1369 if (sta)
1370 hostap_handle_sta_release(sta);
1371 #endif
1372 return 1;
1373
1374 rx_dropped:
1375 kfree(rxb);
1376 rxb = NULL;
1377 stats->rx_dropped++;
1378
1379 /* Returning 0 indicates to caller that we have not handled the SKB--
1380 * so it is still allocated and can be used again by underlying
1381 * hardware as a DMA target */
1382 return 0;
1383 }
1384 EXPORT_SYMBOL(ieee80211_rx);
1385
1386 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
1387
1388 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1389
1390 /*
1391 * Make the structure we read from the beacon packet to have
1392 * the right values
1393 */
ieee80211_verify_qos_info(struct ieee80211_qos_information_element * info_element,int sub_type)1394 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1395 *info_element, int sub_type)
1396 {
1397
1398 if (info_element->qui_subtype != sub_type)
1399 return -1;
1400 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1401 return -1;
1402 if (info_element->qui_type != QOS_OUI_TYPE)
1403 return -1;
1404 if (info_element->version != QOS_VERSION_1)
1405 return -1;
1406
1407 return 0;
1408 }
1409
1410
1411 /*
1412 * Parse a QoS parameter element
1413 */
ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info * element_param,struct ieee80211_info_element * info_element)1414 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
1415 *element_param, struct ieee80211_info_element
1416 *info_element)
1417 {
1418 int ret = 0;
1419 u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
1420
1421 if ((info_element == NULL) || (element_param == NULL))
1422 return -1;
1423
1424 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1425 memcpy(element_param->info_element.qui, info_element->data,
1426 info_element->len);
1427 element_param->info_element.elementID = info_element->id;
1428 element_param->info_element.length = info_element->len;
1429 } else
1430 ret = -1;
1431 if (ret == 0)
1432 ret = ieee80211_verify_qos_info(&element_param->info_element,
1433 QOS_OUI_PARAM_SUB_TYPE);
1434 return ret;
1435 }
1436
1437 /*
1438 * Parse a QoS information element
1439 */
ieee80211_read_qos_info_element(struct ieee80211_qos_information_element * element_info,struct ieee80211_info_element * info_element)1440 static int ieee80211_read_qos_info_element(struct
1441 ieee80211_qos_information_element
1442 *element_info, struct ieee80211_info_element
1443 *info_element)
1444 {
1445 int ret = 0;
1446 u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1447
1448 if (element_info == NULL)
1449 return -1;
1450 if (info_element == NULL)
1451 return -1;
1452
1453 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1454 memcpy(element_info->qui, info_element->data,
1455 info_element->len);
1456 element_info->elementID = info_element->id;
1457 element_info->length = info_element->len;
1458 } else
1459 ret = -1;
1460
1461 if (ret == 0)
1462 ret = ieee80211_verify_qos_info(element_info,
1463 QOS_OUI_INFO_SUB_TYPE);
1464 return ret;
1465 }
1466
1467
1468 /*
1469 * Write QoS parameters from the ac parameters.
1470 */
ieee80211_qos_convert_ac_to_parameters(struct ieee80211_qos_parameter_info * param_elm,struct ieee80211_qos_parameters * qos_param)1471 static int ieee80211_qos_convert_ac_to_parameters(struct
1472 ieee80211_qos_parameter_info
1473 *param_elm, struct
1474 ieee80211_qos_parameters
1475 *qos_param)
1476 {
1477 int i;
1478 struct ieee80211_qos_ac_parameter *ac_params;
1479 u8 aci;
1480 //u8 cw_min;
1481 //u8 cw_max;
1482
1483 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1484 ac_params = &(param_elm->ac_params_record[i]);
1485
1486 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1487
1488 if(aci >= QOS_QUEUE_NUM)
1489 continue;
1490 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1491
1492 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1493 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1494
1495 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1496
1497 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1498
1499 qos_param->flag[aci] =
1500 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1501 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1502 }
1503 return 0;
1504 }
1505
1506 /*
1507 * we have a generic data element which it may contain QoS information or
1508 * parameters element. check the information element length to decide
1509 * which type to read
1510 */
ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element * info_element,struct ieee80211_network * network)1511 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1512 *info_element,
1513 struct ieee80211_network *network)
1514 {
1515 int rc = 0;
1516 struct ieee80211_qos_parameters *qos_param = NULL;
1517 struct ieee80211_qos_information_element qos_info_element;
1518
1519 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1520
1521 if (rc == 0) {
1522 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1523 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1524 } else {
1525 struct ieee80211_qos_parameter_info param_element;
1526
1527 rc = ieee80211_read_qos_param_element(¶m_element,
1528 info_element);
1529 if (rc == 0) {
1530 qos_param = &(network->qos_data.parameters);
1531 ieee80211_qos_convert_ac_to_parameters(¶m_element,
1532 qos_param);
1533 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1534 network->qos_data.param_count =
1535 param_element.info_element.ac_info & 0x0F;
1536 }
1537 }
1538
1539 if (rc == 0) {
1540 IEEE80211_DEBUG_QOS("QoS is supported\n");
1541 network->qos_data.supported = 1;
1542 }
1543 return rc;
1544 }
1545
1546 #ifdef CONFIG_IEEE80211_DEBUG
1547 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1548
get_info_element_string(u16 id)1549 static const char *get_info_element_string(u16 id)
1550 {
1551 switch (id) {
1552 MFIE_STRING(SSID);
1553 MFIE_STRING(RATES);
1554 MFIE_STRING(FH_SET);
1555 MFIE_STRING(DS_SET);
1556 MFIE_STRING(CF_SET);
1557 MFIE_STRING(TIM);
1558 MFIE_STRING(IBSS_SET);
1559 MFIE_STRING(COUNTRY);
1560 MFIE_STRING(HOP_PARAMS);
1561 MFIE_STRING(HOP_TABLE);
1562 MFIE_STRING(REQUEST);
1563 MFIE_STRING(CHALLENGE);
1564 MFIE_STRING(POWER_CONSTRAINT);
1565 MFIE_STRING(POWER_CAPABILITY);
1566 MFIE_STRING(TPC_REQUEST);
1567 MFIE_STRING(TPC_REPORT);
1568 MFIE_STRING(SUPP_CHANNELS);
1569 MFIE_STRING(CSA);
1570 MFIE_STRING(MEASURE_REQUEST);
1571 MFIE_STRING(MEASURE_REPORT);
1572 MFIE_STRING(QUIET);
1573 MFIE_STRING(IBSS_DFS);
1574 // MFIE_STRING(ERP_INFO);
1575 MFIE_STRING(RSN);
1576 MFIE_STRING(RATES_EX);
1577 MFIE_STRING(GENERIC);
1578 MFIE_STRING(QOS_PARAMETER);
1579 default:
1580 return "UNKNOWN";
1581 }
1582 }
1583 #endif
1584
ieee80211_extract_country_ie(struct ieee80211_device * ieee,struct ieee80211_info_element * info_element,struct ieee80211_network * network,u8 * addr2)1585 static inline void ieee80211_extract_country_ie(
1586 struct ieee80211_device *ieee,
1587 struct ieee80211_info_element *info_element,
1588 struct ieee80211_network *network,
1589 u8 *addr2
1590 )
1591 {
1592 if (IS_DOT11D_ENABLE(ieee))
1593 {
1594 if (info_element->len!= 0)
1595 {
1596 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1597 network->CountryIeLen = info_element->len;
1598
1599 if (!IS_COUNTRY_IE_VALID(ieee))
1600 {
1601 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1602 }
1603 }
1604
1605 //
1606 // 070305, rcnjko: I update country IE watch dog here because
1607 // some AP (e.g. Cisco 1242) don't include country IE in their
1608 // probe response frame.
1609 //
1610 if (IS_EQUAL_CIE_SRC(ieee, addr2) )
1611 {
1612 UPDATE_CIE_WATCHDOG(ieee);
1613 }
1614 }
1615
1616 }
1617
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)1618 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1619 struct ieee80211_info_element *info_element,
1620 u16 length,
1621 struct ieee80211_network *network,
1622 struct ieee80211_rx_stats *stats)
1623 {
1624 u8 i;
1625 short offset;
1626 u16 tmp_htcap_len=0;
1627 u16 tmp_htinfo_len=0;
1628 u16 ht_realtek_agg_len=0;
1629 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1630 // u16 broadcom_len = 0;
1631 #ifdef CONFIG_IEEE80211_DEBUG
1632 char rates_str[64];
1633 char *p;
1634 #endif
1635
1636 while (length >= sizeof(*info_element)) {
1637 if (sizeof(*info_element) + info_element->len > length) {
1638 IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1639 "info_element->len + 2 > left : "
1640 "info_element->len+2=%zd left=%d, id=%d.\n",
1641 info_element->len +
1642 sizeof(*info_element),
1643 length, info_element->id);
1644 /* We stop processing but don't return an error here
1645 * because some misbehaviour APs break this rule. ie.
1646 * Orinoco AP1000. */
1647 break;
1648 }
1649
1650 switch (info_element->id) {
1651 case MFIE_TYPE_SSID:
1652 if (ieee80211_is_empty_essid(info_element->data,
1653 info_element->len)) {
1654 network->flags |= NETWORK_EMPTY_ESSID;
1655 break;
1656 }
1657
1658 network->ssid_len = min(info_element->len,
1659 (u8) IW_ESSID_MAX_SIZE);
1660 memcpy(network->ssid, info_element->data, network->ssid_len);
1661 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1662 memset(network->ssid + network->ssid_len, 0,
1663 IW_ESSID_MAX_SIZE - network->ssid_len);
1664
1665 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1666 network->ssid, network->ssid_len);
1667 break;
1668
1669 case MFIE_TYPE_RATES:
1670 #ifdef CONFIG_IEEE80211_DEBUG
1671 p = rates_str;
1672 #endif
1673 network->rates_len = min(info_element->len,
1674 MAX_RATES_LENGTH);
1675 for (i = 0; i < network->rates_len; i++) {
1676 network->rates[i] = info_element->data[i];
1677 #ifdef CONFIG_IEEE80211_DEBUG
1678 p += snprintf(p, sizeof(rates_str) -
1679 (p - rates_str), "%02X ",
1680 network->rates[i]);
1681 #endif
1682 if (ieee80211_is_ofdm_rate
1683 (info_element->data[i])) {
1684 network->flags |= NETWORK_HAS_OFDM;
1685 if (info_element->data[i] &
1686 IEEE80211_BASIC_RATE_MASK)
1687 network->flags &=
1688 ~NETWORK_HAS_CCK;
1689 }
1690 }
1691
1692 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1693 rates_str, network->rates_len);
1694 break;
1695
1696 case MFIE_TYPE_RATES_EX:
1697 #ifdef CONFIG_IEEE80211_DEBUG
1698 p = rates_str;
1699 #endif
1700 network->rates_ex_len = min(info_element->len,
1701 MAX_RATES_EX_LENGTH);
1702 for (i = 0; i < network->rates_ex_len; i++) {
1703 network->rates_ex[i] = info_element->data[i];
1704 #ifdef CONFIG_IEEE80211_DEBUG
1705 p += snprintf(p, sizeof(rates_str) -
1706 (p - rates_str), "%02X ",
1707 network->rates_ex[i]);
1708 #endif
1709 if (ieee80211_is_ofdm_rate
1710 (info_element->data[i])) {
1711 network->flags |= NETWORK_HAS_OFDM;
1712 if (info_element->data[i] &
1713 IEEE80211_BASIC_RATE_MASK)
1714 network->flags &=
1715 ~NETWORK_HAS_CCK;
1716 }
1717 }
1718
1719 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1720 rates_str, network->rates_ex_len);
1721 break;
1722
1723 case MFIE_TYPE_DS_SET:
1724 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1725 info_element->data[0]);
1726 network->channel = info_element->data[0];
1727 break;
1728
1729 case MFIE_TYPE_FH_SET:
1730 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1731 break;
1732
1733 case MFIE_TYPE_CF_SET:
1734 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1735 break;
1736
1737 case MFIE_TYPE_TIM:
1738 if(info_element->len < 4)
1739 break;
1740
1741 network->tim.tim_count = info_element->data[0];
1742 network->tim.tim_period = info_element->data[1];
1743
1744 network->dtim_period = info_element->data[1];
1745 if(ieee->state != IEEE80211_LINKED)
1746 break;
1747
1748 network->last_dtim_sta_time[0] = stats->mac_time[0];
1749 network->last_dtim_sta_time[1] = stats->mac_time[1];
1750
1751 network->dtim_data = IEEE80211_DTIM_VALID;
1752
1753 if(info_element->data[0] != 0)
1754 break;
1755
1756 if(info_element->data[2] & 1)
1757 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1758
1759 offset = (info_element->data[2] >> 1)*2;
1760
1761 //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
1762
1763 if(ieee->assoc_id < 8*offset ||
1764 ieee->assoc_id > 8*(offset + info_element->len -3))
1765
1766 break;
1767
1768 offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1769
1770 if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1771 network->dtim_data |= IEEE80211_DTIM_UCAST;
1772
1773 //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1774 break;
1775
1776 case MFIE_TYPE_ERP:
1777 network->erp_value = info_element->data[0];
1778 network->flags |= NETWORK_HAS_ERP_VALUE;
1779 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1780 network->erp_value);
1781 break;
1782 case MFIE_TYPE_IBSS_SET:
1783 network->atim_window = info_element->data[0];
1784 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1785 network->atim_window);
1786 break;
1787
1788 case MFIE_TYPE_CHALLENGE:
1789 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1790 break;
1791
1792 case MFIE_TYPE_GENERIC:
1793 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1794 info_element->len);
1795 if (!ieee80211_parse_qos_info_param_IE(info_element,
1796 network))
1797 break;
1798
1799 if (info_element->len >= 4 &&
1800 info_element->data[0] == 0x00 &&
1801 info_element->data[1] == 0x50 &&
1802 info_element->data[2] == 0xf2 &&
1803 info_element->data[3] == 0x01) {
1804 network->wpa_ie_len = min(info_element->len + 2,
1805 MAX_WPA_IE_LEN);
1806 memcpy(network->wpa_ie, info_element,
1807 network->wpa_ie_len);
1808 break;
1809 }
1810
1811 #ifdef THOMAS_TURBO
1812 if (info_element->len == 7 &&
1813 info_element->data[0] == 0x00 &&
1814 info_element->data[1] == 0xe0 &&
1815 info_element->data[2] == 0x4c &&
1816 info_element->data[3] == 0x01 &&
1817 info_element->data[4] == 0x02) {
1818 network->Turbo_Enable = 1;
1819 }
1820 #endif
1821
1822 //for HTcap and HTinfo parameters
1823 if(tmp_htcap_len == 0){
1824 if(info_element->len >= 4 &&
1825 info_element->data[0] == 0x00 &&
1826 info_element->data[1] == 0x90 &&
1827 info_element->data[2] == 0x4c &&
1828 info_element->data[3] == 0x033){
1829
1830 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1831 if(tmp_htcap_len != 0){
1832 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1833 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1834 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1835 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1836 }
1837 }
1838 if(tmp_htcap_len != 0)
1839 network->bssht.bdSupportHT = true;
1840 else
1841 network->bssht.bdSupportHT = false;
1842 }
1843
1844
1845 if(tmp_htinfo_len == 0){
1846 if(info_element->len >= 4 &&
1847 info_element->data[0] == 0x00 &&
1848 info_element->data[1] == 0x90 &&
1849 info_element->data[2] == 0x4c &&
1850 info_element->data[3] == 0x034){
1851
1852 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1853 if(tmp_htinfo_len != 0){
1854 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1855 if(tmp_htinfo_len){
1856 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1857 sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1858 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1859 }
1860
1861 }
1862
1863 }
1864 }
1865
1866 if(ieee->aggregation){
1867 if(network->bssht.bdSupportHT){
1868 if(info_element->len >= 4 &&
1869 info_element->data[0] == 0x00 &&
1870 info_element->data[1] == 0xe0 &&
1871 info_element->data[2] == 0x4c &&
1872 info_element->data[3] == 0x02){
1873
1874 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
1875 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
1876
1877 }
1878 if(ht_realtek_agg_len >= 5){
1879 network->bssht.bdRT2RTAggregation = true;
1880
1881 if((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1882 network->bssht.bdRT2RTLongSlotTime = true;
1883 }
1884 }
1885
1886 }
1887
1888 //if(tmp_htcap_len !=0 || tmp_htinfo_len != 0)
1889 {
1890 if ((info_element->len >= 3 &&
1891 info_element->data[0] == 0x00 &&
1892 info_element->data[1] == 0x05 &&
1893 info_element->data[2] == 0xb5) ||
1894 (info_element->len >= 3 &&
1895 info_element->data[0] == 0x00 &&
1896 info_element->data[1] == 0x0a &&
1897 info_element->data[2] == 0xf7) ||
1898 (info_element->len >= 3 &&
1899 info_element->data[0] == 0x00 &&
1900 info_element->data[1] == 0x10 &&
1901 info_element->data[2] == 0x18)){
1902
1903 network->broadcom_cap_exist = true;
1904
1905 }
1906 }
1907 if(info_element->len >= 3 &&
1908 info_element->data[0] == 0x00 &&
1909 info_element->data[1] == 0x0c &&
1910 info_element->data[2] == 0x43)
1911 {
1912 network->ralink_cap_exist = true;
1913 }
1914 else
1915 network->ralink_cap_exist = false;
1916 //added by amy for atheros AP
1917 if((info_element->len >= 3 &&
1918 info_element->data[0] == 0x00 &&
1919 info_element->data[1] == 0x03 &&
1920 info_element->data[2] == 0x7f) ||
1921 (info_element->len >= 3 &&
1922 info_element->data[0] == 0x00 &&
1923 info_element->data[1] == 0x13 &&
1924 info_element->data[2] == 0x74))
1925 {
1926 printk("========>%s(): athros AP is exist\n",__func__);
1927 network->atheros_cap_exist = true;
1928 }
1929 else
1930 network->atheros_cap_exist = false;
1931
1932 if(info_element->len >= 3 &&
1933 info_element->data[0] == 0x00 &&
1934 info_element->data[1] == 0x40 &&
1935 info_element->data[2] == 0x96)
1936 {
1937 network->cisco_cap_exist = true;
1938 }
1939 else
1940 network->cisco_cap_exist = false;
1941 //added by amy for LEAP of cisco
1942 if (info_element->len > 4 &&
1943 info_element->data[0] == 0x00 &&
1944 info_element->data[1] == 0x40 &&
1945 info_element->data[2] == 0x96 &&
1946 info_element->data[3] == 0x01)
1947 {
1948 if(info_element->len == 6)
1949 {
1950 memcpy(network->CcxRmState, &info_element[4], 2);
1951 if(network->CcxRmState[0] != 0)
1952 {
1953 network->bCcxRmEnable = true;
1954 }
1955 else
1956 network->bCcxRmEnable = false;
1957 //
1958 // CCXv4 Table 59-1 MBSSID Masks.
1959 //
1960 network->MBssidMask = network->CcxRmState[1] & 0x07;
1961 if(network->MBssidMask != 0)
1962 {
1963 network->bMBssidValid = true;
1964 network->MBssidMask = 0xff << (network->MBssidMask);
1965 cpMacAddr(network->MBssid, network->bssid);
1966 network->MBssid[5] &= network->MBssidMask;
1967 }
1968 else
1969 {
1970 network->bMBssidValid = false;
1971 }
1972 }
1973 else
1974 {
1975 network->bCcxRmEnable = false;
1976 }
1977 }
1978 if (info_element->len > 4 &&
1979 info_element->data[0] == 0x00 &&
1980 info_element->data[1] == 0x40 &&
1981 info_element->data[2] == 0x96 &&
1982 info_element->data[3] == 0x03)
1983 {
1984 if(info_element->len == 5)
1985 {
1986 network->bWithCcxVerNum = true;
1987 network->BssCcxVerNumber = info_element->data[4];
1988 }
1989 else
1990 {
1991 network->bWithCcxVerNum = false;
1992 network->BssCcxVerNumber = 0;
1993 }
1994 }
1995 break;
1996
1997 case MFIE_TYPE_RSN:
1998 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1999 info_element->len);
2000 network->rsn_ie_len = min(info_element->len + 2,
2001 MAX_WPA_IE_LEN);
2002 memcpy(network->rsn_ie, info_element,
2003 network->rsn_ie_len);
2004 break;
2005
2006 //HT related element.
2007 case MFIE_TYPE_HT_CAP:
2008 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2009 info_element->len);
2010 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
2011 if(tmp_htcap_len != 0){
2012 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2013 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
2014 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
2015 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
2016
2017 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
2018 // windows driver will update WMM parameters each beacon received once connected
2019 // Linux driver is a bit different.
2020 network->bssht.bdSupportHT = true;
2021 }
2022 else
2023 network->bssht.bdSupportHT = false;
2024 break;
2025
2026
2027 case MFIE_TYPE_HT_INFO:
2028 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2029 info_element->len);
2030 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2031 if(tmp_htinfo_len){
2032 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2033 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2034 sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2035 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2036 }
2037 break;
2038
2039 case MFIE_TYPE_AIRONET:
2040 IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2041 info_element->len);
2042 if(info_element->len >IE_CISCO_FLAG_POSITION)
2043 {
2044 network->bWithAironetIE = true;
2045
2046 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
2047 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
2048 // by adding an Aironet element and setting one or both of the CKIP negotiation bits."
2049 if( (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC) ||
2050 (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK) )
2051 {
2052 network->bCkipSupported = true;
2053 }
2054 else
2055 {
2056 network->bCkipSupported = false;
2057 }
2058 }
2059 else
2060 {
2061 network->bWithAironetIE = false;
2062 network->bCkipSupported = false;
2063 }
2064 break;
2065 case MFIE_TYPE_QOS_PARAMETER:
2066 printk(KERN_ERR
2067 "QoS Error need to parse QOS_PARAMETER IE\n");
2068 break;
2069
2070 case MFIE_TYPE_COUNTRY:
2071 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2072 info_element->len);
2073 //printk("=====>Receive <%s> Country IE\n",network->ssid);
2074 ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
2075 break;
2076 /* TODO */
2077 default:
2078 IEEE80211_DEBUG_MGMT
2079 ("Unsupported info element: %s (%d)\n",
2080 get_info_element_string(info_element->id),
2081 info_element->id);
2082 break;
2083 }
2084
2085 length -= sizeof(*info_element) + info_element->len;
2086 info_element =
2087 (struct ieee80211_info_element *)&info_element->
2088 data[info_element->len];
2089 }
2090
2091 if(!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2092 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2093 {
2094 network->unknown_cap_exist = true;
2095 }
2096 else
2097 {
2098 network->unknown_cap_exist = false;
2099 }
2100 return 0;
2101 }
2102
ieee80211_SignalStrengthTranslate(u8 CurrSS)2103 static inline u8 ieee80211_SignalStrengthTranslate(
2104 u8 CurrSS
2105 )
2106 {
2107 u8 RetSS;
2108
2109 // Step 1. Scale mapping.
2110 if(CurrSS >= 71 && CurrSS <= 100)
2111 {
2112 RetSS = 90 + ((CurrSS - 70) / 3);
2113 }
2114 else if(CurrSS >= 41 && CurrSS <= 70)
2115 {
2116 RetSS = 78 + ((CurrSS - 40) / 3);
2117 }
2118 else if(CurrSS >= 31 && CurrSS <= 40)
2119 {
2120 RetSS = 66 + (CurrSS - 30);
2121 }
2122 else if(CurrSS >= 21 && CurrSS <= 30)
2123 {
2124 RetSS = 54 + (CurrSS - 20);
2125 }
2126 else if(CurrSS >= 5 && CurrSS <= 20)
2127 {
2128 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2129 }
2130 else if(CurrSS == 4)
2131 {
2132 RetSS = 36;
2133 }
2134 else if(CurrSS == 3)
2135 {
2136 RetSS = 27;
2137 }
2138 else if(CurrSS == 2)
2139 {
2140 RetSS = 18;
2141 }
2142 else if(CurrSS == 1)
2143 {
2144 RetSS = 9;
2145 }
2146 else
2147 {
2148 RetSS = CurrSS;
2149 }
2150 //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2151
2152 // Step 2. Smoothing.
2153
2154 //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2155
2156 return RetSS;
2157 }
2158
2159 /* 0-100 index */
ieee80211_translate_todbm(u8 signal_strength_index)2160 static long ieee80211_translate_todbm(u8 signal_strength_index)
2161 {
2162 long signal_power; // in dBm.
2163
2164 // Translate to dBm (x=0.5y-95).
2165 signal_power = (long)((signal_strength_index + 1) >> 1);
2166 signal_power -= 95;
2167
2168 return signal_power;
2169 }
2170
ieee80211_network_init(struct ieee80211_device * ieee,struct ieee80211_probe_response * beacon,struct ieee80211_network * network,struct ieee80211_rx_stats * stats)2171 static inline int ieee80211_network_init(
2172 struct ieee80211_device *ieee,
2173 struct ieee80211_probe_response *beacon,
2174 struct ieee80211_network *network,
2175 struct ieee80211_rx_stats *stats)
2176 {
2177 #ifdef CONFIG_IEEE80211_DEBUG
2178 //char rates_str[64];
2179 //char *p;
2180 #endif
2181
2182 network->qos_data.active = 0;
2183 network->qos_data.supported = 0;
2184 network->qos_data.param_count = 0;
2185 network->qos_data.old_param_count = 0;
2186
2187 /* Pull out fixed field data */
2188 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2189 network->capability = le16_to_cpu(beacon->capability);
2190 network->last_scanned = jiffies;
2191 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2192 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2193 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2194 /* Where to pull this? beacon->listen_interval;*/
2195 network->listen_interval = 0x0A;
2196 network->rates_len = network->rates_ex_len = 0;
2197 network->last_associate = 0;
2198 network->ssid_len = 0;
2199 network->flags = 0;
2200 network->atim_window = 0;
2201 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2202 0x3 : 0x0;
2203 network->berp_info_valid = false;
2204 network->broadcom_cap_exist = false;
2205 network->ralink_cap_exist = false;
2206 network->atheros_cap_exist = false;
2207 network->cisco_cap_exist = false;
2208 network->unknown_cap_exist = false;
2209 #ifdef THOMAS_TURBO
2210 network->Turbo_Enable = 0;
2211 #endif
2212 network->CountryIeLen = 0;
2213 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2214 //Initialize HT parameters
2215 //ieee80211_ht_initialize(&network->bssht);
2216 HTInitializeBssDesc(&network->bssht);
2217 if (stats->freq == IEEE80211_52GHZ_BAND) {
2218 /* for A band (No DS info) */
2219 network->channel = stats->received_channel;
2220 } else
2221 network->flags |= NETWORK_HAS_CCK;
2222
2223 network->wpa_ie_len = 0;
2224 network->rsn_ie_len = 0;
2225
2226 if (ieee80211_parse_info_param
2227 (ieee,beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2228 return 1;
2229
2230 network->mode = 0;
2231 if (stats->freq == IEEE80211_52GHZ_BAND)
2232 network->mode = IEEE_A;
2233 else {
2234 if (network->flags & NETWORK_HAS_OFDM)
2235 network->mode |= IEEE_G;
2236 if (network->flags & NETWORK_HAS_CCK)
2237 network->mode |= IEEE_B;
2238 }
2239
2240 if (network->mode == 0) {
2241 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
2242 "network.\n",
2243 escape_essid(network->ssid,
2244 network->ssid_len),
2245 network->bssid);
2246 return 1;
2247 }
2248
2249 if(network->bssht.bdSupportHT){
2250 if(network->mode == IEEE_A)
2251 network->mode = IEEE_N_5G;
2252 else if(network->mode & (IEEE_G | IEEE_B))
2253 network->mode = IEEE_N_24G;
2254 }
2255 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2256 network->flags |= NETWORK_EMPTY_ESSID;
2257
2258 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2259 //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2260 stats->noise = ieee80211_translate_todbm((u8)(100-stats->signal)) -25;
2261
2262 memcpy(&network->stats, stats, sizeof(network->stats));
2263
2264 return 0;
2265 }
2266
is_same_network(struct ieee80211_network * src,struct ieee80211_network * dst,struct ieee80211_device * ieee)2267 static inline int is_same_network(struct ieee80211_network *src,
2268 struct ieee80211_network *dst, struct ieee80211_device *ieee)
2269 {
2270 /* A network is only a duplicate if the channel, BSSID, ESSID
2271 * and the capability field (in particular IBSS and BSS) all match.
2272 * We treat all <hidden> with the same BSSID and channel
2273 * as one network */
2274 return //((src->ssid_len == dst->ssid_len) &&
2275 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2276 (src->channel == dst->channel) &&
2277 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2278 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2279 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2280 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2281 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2282 ((src->capability & WLAN_CAPABILITY_BSS) ==
2283 (dst->capability & WLAN_CAPABILITY_BSS)));
2284 }
2285
update_network(struct ieee80211_network * dst,struct ieee80211_network * src)2286 static inline void update_network(struct ieee80211_network *dst,
2287 struct ieee80211_network *src)
2288 {
2289 int qos_active;
2290 u8 old_param;
2291
2292 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2293 dst->capability = src->capability;
2294 memcpy(dst->rates, src->rates, src->rates_len);
2295 dst->rates_len = src->rates_len;
2296 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2297 dst->rates_ex_len = src->rates_ex_len;
2298 if (src->ssid_len > 0)
2299 {
2300 memset(dst->ssid, 0, dst->ssid_len);
2301 dst->ssid_len = src->ssid_len;
2302 memcpy(dst->ssid, src->ssid, src->ssid_len);
2303 }
2304 dst->mode = src->mode;
2305 dst->flags = src->flags;
2306 dst->time_stamp[0] = src->time_stamp[0];
2307 dst->time_stamp[1] = src->time_stamp[1];
2308 if (src->flags & NETWORK_HAS_ERP_VALUE)
2309 {
2310 dst->erp_value = src->erp_value;
2311 dst->berp_info_valid = src->berp_info_valid = true;
2312 }
2313 dst->beacon_interval = src->beacon_interval;
2314 dst->listen_interval = src->listen_interval;
2315 dst->atim_window = src->atim_window;
2316 dst->dtim_period = src->dtim_period;
2317 dst->dtim_data = src->dtim_data;
2318 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2319 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2320 memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2321
2322 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2323 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2324 dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2325 memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2326 dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2327 memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2328 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2329 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2330 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2331 dst->ralink_cap_exist = src->ralink_cap_exist;
2332 dst->atheros_cap_exist = src->atheros_cap_exist;
2333 dst->cisco_cap_exist = src->cisco_cap_exist;
2334 dst->unknown_cap_exist = src->unknown_cap_exist;
2335 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2336 dst->wpa_ie_len = src->wpa_ie_len;
2337 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2338 dst->rsn_ie_len = src->rsn_ie_len;
2339
2340 dst->last_scanned = jiffies;
2341 /* qos related parameters */
2342 //qos_active = src->qos_data.active;
2343 qos_active = dst->qos_data.active;
2344 //old_param = dst->qos_data.old_param_count;
2345 old_param = dst->qos_data.param_count;
2346 if(dst->flags & NETWORK_HAS_QOS_MASK)
2347 memcpy(&dst->qos_data, &src->qos_data,
2348 sizeof(struct ieee80211_qos_data));
2349 else {
2350 dst->qos_data.supported = src->qos_data.supported;
2351 dst->qos_data.param_count = src->qos_data.param_count;
2352 }
2353
2354 if (dst->qos_data.supported == 1) {
2355 dst->QoS_Enable = 1;
2356 if(dst->ssid_len)
2357 IEEE80211_DEBUG_QOS
2358 ("QoS the network %s is QoS supported\n",
2359 dst->ssid);
2360 else
2361 IEEE80211_DEBUG_QOS
2362 ("QoS the network is QoS supported\n");
2363 }
2364 dst->qos_data.active = qos_active;
2365 dst->qos_data.old_param_count = old_param;
2366
2367 /* dst->last_associate is not overwritten */
2368 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2369 if (src->wmm_param[0].ac_aci_acm_aifsn|| \
2370 src->wmm_param[1].ac_aci_acm_aifsn|| \
2371 src->wmm_param[2].ac_aci_acm_aifsn|| \
2372 src->wmm_param[3].ac_aci_acm_aifsn) {
2373 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2374 }
2375 //dst->QoS_Enable = src->QoS_Enable;
2376 #ifdef THOMAS_TURBO
2377 dst->Turbo_Enable = src->Turbo_Enable;
2378 #endif
2379
2380 dst->CountryIeLen = src->CountryIeLen;
2381 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2382
2383 //added by amy for LEAP
2384 dst->bWithAironetIE = src->bWithAironetIE;
2385 dst->bCkipSupported = src->bCkipSupported;
2386 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2387 dst->bCcxRmEnable = src->bCcxRmEnable;
2388 dst->MBssidMask = src->MBssidMask;
2389 dst->bMBssidValid = src->bMBssidValid;
2390 memcpy(dst->MBssid, src->MBssid, 6);
2391 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2392 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2393
2394 }
2395
is_beacon(__le16 fc)2396 static inline int is_beacon(__le16 fc)
2397 {
2398 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2399 }
2400
ieee80211_process_probe_response(struct ieee80211_device * ieee,struct ieee80211_probe_response * beacon,struct ieee80211_rx_stats * stats)2401 static inline void ieee80211_process_probe_response(
2402 struct ieee80211_device *ieee,
2403 struct ieee80211_probe_response *beacon,
2404 struct ieee80211_rx_stats *stats)
2405 {
2406 struct ieee80211_network network;
2407 struct ieee80211_network *target;
2408 struct ieee80211_network *oldest = NULL;
2409 #ifdef CONFIG_IEEE80211_DEBUG
2410 struct ieee80211_info_element *info_element = &beacon->info_element[0];
2411 #endif
2412 unsigned long flags;
2413 short renew;
2414 //u8 wmm_info;
2415
2416 memset(&network, 0, sizeof(struct ieee80211_network));
2417 IEEE80211_DEBUG_SCAN(
2418 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2419 escape_essid(info_element->data, info_element->len),
2420 beacon->header.addr3,
2421 (beacon->capability & (1<<0xf)) ? '1' : '0',
2422 (beacon->capability & (1<<0xe)) ? '1' : '0',
2423 (beacon->capability & (1<<0xd)) ? '1' : '0',
2424 (beacon->capability & (1<<0xc)) ? '1' : '0',
2425 (beacon->capability & (1<<0xb)) ? '1' : '0',
2426 (beacon->capability & (1<<0xa)) ? '1' : '0',
2427 (beacon->capability & (1<<0x9)) ? '1' : '0',
2428 (beacon->capability & (1<<0x8)) ? '1' : '0',
2429 (beacon->capability & (1<<0x7)) ? '1' : '0',
2430 (beacon->capability & (1<<0x6)) ? '1' : '0',
2431 (beacon->capability & (1<<0x5)) ? '1' : '0',
2432 (beacon->capability & (1<<0x4)) ? '1' : '0',
2433 (beacon->capability & (1<<0x3)) ? '1' : '0',
2434 (beacon->capability & (1<<0x2)) ? '1' : '0',
2435 (beacon->capability & (1<<0x1)) ? '1' : '0',
2436 (beacon->capability & (1<<0x0)) ? '1' : '0');
2437
2438 if (ieee80211_network_init(ieee, beacon, &network, stats)) {
2439 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
2440 escape_essid(info_element->data,
2441 info_element->len),
2442 beacon->header.addr3,
2443 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2444 IEEE80211_STYPE_PROBE_RESP ?
2445 "PROBE RESPONSE" : "BEACON");
2446 return;
2447 }
2448
2449 // For Asus EeePc request,
2450 // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2451 // wireless adapter should follow the country code.
2452 // (2) If there is no any country code in beacon,
2453 // then wireless adapter should do active scan from ch1~11 and
2454 // passive scan from ch12~14
2455
2456 if (!IsLegalChannel(ieee, network.channel))
2457 return;
2458 if (ieee->bGlobalDomain)
2459 {
2460 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP)
2461 {
2462 // Case 1: Country code
2463 if(IS_COUNTRY_IE_VALID(ieee) )
2464 {
2465 if (!IsLegalChannel(ieee, network.channel)) {
2466 printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
2467 return;
2468 }
2469 }
2470 // Case 2: No any country code.
2471 else
2472 {
2473 // Filter over channel ch12~14
2474 if (network.channel > 11)
2475 {
2476 printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
2477 return;
2478 }
2479 }
2480 }
2481 else
2482 {
2483 // Case 1: Country code
2484 if(IS_COUNTRY_IE_VALID(ieee) )
2485 {
2486 if (!IsLegalChannel(ieee, network.channel)) {
2487 printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel);
2488 return;
2489 }
2490 }
2491 // Case 2: No any country code.
2492 else
2493 {
2494 // Filter over channel ch12~14
2495 if (network.channel > 14)
2496 {
2497 printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel);
2498 return;
2499 }
2500 }
2501 }
2502 }
2503
2504 /* The network parsed correctly -- so now we scan our known networks
2505 * to see if we can find it in our list.
2506 *
2507 * NOTE: This search is definitely not optimized. Once its doing
2508 * the "right thing" we'll optimize it for efficiency if
2509 * necessary */
2510
2511 /* Search for this entry in the list and update it if it is
2512 * already there. */
2513
2514 spin_lock_irqsave(&ieee->lock, flags);
2515
2516 if (is_same_network(&ieee->current_network, &network, ieee)) {
2517 update_network(&ieee->current_network, &network);
2518 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2519 && ieee->current_network.berp_info_valid){
2520 if(ieee->current_network.erp_value& ERP_UseProtection)
2521 ieee->current_network.buseprotection = true;
2522 else
2523 ieee->current_network.buseprotection = false;
2524 }
2525 if(is_beacon(beacon->header.frame_ctl))
2526 {
2527 if(ieee->state == IEEE80211_LINKED)
2528 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2529 }
2530 else //hidden AP
2531 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2532 }
2533
2534 list_for_each_entry(target, &ieee->network_list, list) {
2535 if (is_same_network(target, &network, ieee))
2536 break;
2537 if ((oldest == NULL) ||
2538 (target->last_scanned < oldest->last_scanned))
2539 oldest = target;
2540 }
2541
2542 /* If we didn't find a match, then get a new network slot to initialize
2543 * with this beacon's information */
2544 if (&target->list == &ieee->network_list) {
2545 if (list_empty(&ieee->network_free_list)) {
2546 /* If there are no more slots, expire the oldest */
2547 list_del(&oldest->list);
2548 target = oldest;
2549 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
2550 "network list.\n",
2551 escape_essid(target->ssid,
2552 target->ssid_len),
2553 target->bssid);
2554 } else {
2555 /* Otherwise just pull from the free list */
2556 target = list_entry(ieee->network_free_list.next,
2557 struct ieee80211_network, list);
2558 list_del(ieee->network_free_list.next);
2559 }
2560
2561
2562 #ifdef CONFIG_IEEE80211_DEBUG
2563 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
2564 escape_essid(network.ssid,
2565 network.ssid_len),
2566 network.bssid,
2567 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2568 IEEE80211_STYPE_PROBE_RESP ?
2569 "PROBE RESPONSE" : "BEACON");
2570 #endif
2571 memcpy(target, &network, sizeof(*target));
2572 list_add_tail(&target->list, &ieee->network_list);
2573 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2574 ieee80211_softmac_new_net(ieee,&network);
2575 } else {
2576 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
2577 escape_essid(target->ssid,
2578 target->ssid_len),
2579 target->bssid,
2580 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2581 IEEE80211_STYPE_PROBE_RESP ?
2582 "PROBE RESPONSE" : "BEACON");
2583
2584 /* we have an entry and we are going to update it. But this entry may
2585 * be already expired. In this case we do the same as we found a new
2586 * net and call the new_net handler
2587 */
2588 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2589 //YJ,add,080819,for hidden ap
2590 if(is_beacon(beacon->header.frame_ctl) == 0)
2591 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
2592 //if(strncmp(network.ssid, "linksys-c",9) == 0)
2593 // printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
2594 if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2595 && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
2596 ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
2597 renew = 1;
2598 //YJ,add,080819,for hidden ap,end
2599
2600 update_network(target, &network);
2601 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2602 ieee80211_softmac_new_net(ieee,&network);
2603 }
2604
2605 spin_unlock_irqrestore(&ieee->lock, flags);
2606 if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, &network, ieee)&&\
2607 (ieee->state == IEEE80211_LINKED)) {
2608 if (ieee->handle_beacon != NULL) {
2609 ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
2610 }
2611 }
2612 }
2613
ieee80211_rx_mgt(struct ieee80211_device * ieee,struct ieee80211_hdr_4addr * header,struct ieee80211_rx_stats * stats)2614 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2615 struct ieee80211_hdr_4addr *header,
2616 struct ieee80211_rx_stats *stats)
2617 {
2618 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2619
2620 case IEEE80211_STYPE_BEACON:
2621 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2622 WLAN_FC_GET_STYPE(header->frame_ctl));
2623 IEEE80211_DEBUG_SCAN("Beacon\n");
2624 ieee80211_process_probe_response(
2625 ieee, (struct ieee80211_probe_response *)header, stats);
2626 break;
2627
2628 case IEEE80211_STYPE_PROBE_RESP:
2629 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2630 WLAN_FC_GET_STYPE(header->frame_ctl));
2631 IEEE80211_DEBUG_SCAN("Probe response\n");
2632 ieee80211_process_probe_response(
2633 ieee, (struct ieee80211_probe_response *)header, stats);
2634 break;
2635
2636 }
2637 }
2638 EXPORT_SYMBOL(ieee80211_rx_mgt);
2639