?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
staging: rtl8192e: Modify time handling
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / rtl8192e / rtllib_rx.c
blob9606bedf16deb1fb336c412f4dfae4c9faa18b4f
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/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/version.h>
40 #include <linux/wireless.h>
41 #include <linux/etherdevice.h>
42 #include <asm/uaccess.h>
43 #include <linux/ctype.h>
44
45 #include "rtllib.h"
46 #include "dot11d.h"
47
48 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
49 struct sk_buff *skb,struct rtllib_rx_stats *rx_status,
50 size_t hdr_length)
51 {
52 skb->dev = ieee->dev;
53 skb_reset_mac_header(skb);
54 skb_pull(skb, hdr_length);
55 skb->pkt_type = PACKET_OTHERHOST;
56 skb->protocol = __constant_htons(ETH_P_80211_RAW);
57 memset(skb->cb, 0, sizeof(skb->cb));
58 netif_rx(skb);
59 }
60
61 /* Called only as a tasklet (software IRQ) */
62 static struct rtllib_frag_entry *
63 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
64 unsigned int frag, u8 tid,u8 *src, u8 *dst)
65 {
66 struct rtllib_frag_entry *entry;
67 int i;
68
69 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
70 entry = &ieee->frag_cache[tid][i];
71 if (entry->skb != NULL &&
72 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
73 RTLLIB_DEBUG_FRAG(
74 "expiring fragment cache entry "
75 "seq=%u last_frag=%u\n",
76 entry->seq, entry->last_frag);
77 dev_kfree_skb_any(entry->skb);
78 entry->skb = NULL;
79 }
80
81 if (entry->skb != NULL && entry->seq == seq &&
82 (entry->last_frag + 1 == frag || frag == -1) &&
83 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
84 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
85 return entry;
86 }
87
88 return NULL;
89 }
90
91 /* Called only as a tasklet (software IRQ) */
92 static struct sk_buff *
93 rtllib_frag_cache_get(struct rtllib_device *ieee,
94 struct rtllib_hdr_4addr *hdr)
95 {
96 struct sk_buff *skb = NULL;
97 u16 fc = le16_to_cpu(hdr->frame_ctl);
98 u16 sc = le16_to_cpu(hdr->seq_ctl);
99 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
100 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
101 struct rtllib_frag_entry *entry;
102 struct rtllib_hdr_3addrqos *hdr_3addrqos;
103 struct rtllib_hdr_4addrqos *hdr_4addrqos;
104 u8 tid;
105
106 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) {
107 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
108 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
109 tid = UP2AC(tid);
110 tid ++;
111 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
112 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
113 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
114 tid = UP2AC(tid);
115 tid ++;
116 } else {
117 tid = 0;
118 }
119
120 if (frag == 0) {
121 /* Reserve enough space to fit maximum frame length */
122 skb = dev_alloc_skb(ieee->dev->mtu +
123 sizeof(struct rtllib_hdr_4addr) +
124 8 /* LLC */ +
125 2 /* alignment */ +
126 8 /* WEP */ +
127 ETH_ALEN /* WDS */ +
128 (RTLLIB_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
129 if (skb == NULL)
130 return NULL;
131
132 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
133 ieee->frag_next_idx[tid]++;
134 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
135 ieee->frag_next_idx[tid] = 0;
136
137 if (entry->skb != NULL)
138 dev_kfree_skb_any(entry->skb);
139
140 entry->first_frag_time = jiffies;
141 entry->seq = seq;
142 entry->last_frag = frag;
143 entry->skb = skb;
144 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
145 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
146 } else {
147 /* received a fragment of a frame for which the head fragment
148 * should have already been received */
149 entry = rtllib_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
150 hdr->addr1);
151 if (entry != NULL) {
152 entry->last_frag = frag;
153 skb = entry->skb;
154 }
155 }
156
157 return skb;
158 }
159
160
161 /* Called only as a tasklet (software IRQ) */
162 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
163 struct rtllib_hdr_4addr *hdr)
164 {
165 u16 fc = le16_to_cpu(hdr->frame_ctl);
166 u16 sc = le16_to_cpu(hdr->seq_ctl);
167 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
168 struct rtllib_frag_entry *entry;
169 struct rtllib_hdr_3addrqos *hdr_3addrqos;
170 struct rtllib_hdr_4addrqos *hdr_4addrqos;
171 u8 tid;
172
173 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) {
174 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
175 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
176 tid = UP2AC(tid);
177 tid ++;
178 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
179 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
180 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
181 tid = UP2AC(tid);
182 tid ++;
183 } else {
184 tid = 0;
185 }
186
187 entry = rtllib_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
188 hdr->addr1);
189
190 if (entry == NULL) {
191 RTLLIB_DEBUG_FRAG(
192 "could not invalidate fragment cache "
193 "entry (seq=%u)\n", seq);
194 return -1;
195 }
196
197 entry->skb = NULL;
198 return 0;
199 }
200
201
202
203 /* rtllib_rx_frame_mgtmt
204 *
205 * Responsible for handling management control frames
206 *
207 * Called by rtllib_rx */
208 static inline int
209 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
210 struct rtllib_rx_stats *rx_stats, u16 type,
211 u16 stype)
212 {
213 /* On the struct stats definition there is written that
214 * this is not mandatory.... but seems that the probe
215 * response parser uses it
216 */
217 struct rtllib_hdr_3addr * hdr = (struct rtllib_hdr_3addr *)skb->data;
218
219 rx_stats->len = skb->len;
220 rtllib_rx_mgt(ieee,skb,rx_stats);
221 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
222 dev_kfree_skb_any(skb);
223 return 0;
224 }
225 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
226
227 dev_kfree_skb_any(skb);
228
229 return 0;
230 }
231
232 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
233 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
234 static unsigned char rfc1042_header[] =
235 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
236 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
237 static unsigned char bridge_tunnel_header[] =
238 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
239 /* No encapsulation header if EtherType < 0x600 (=length) */
240
241 /* Called by rtllib_rx_frame_decrypt */
242 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
243 struct sk_buff *skb, size_t hdrlen)
244 {
245 struct net_device *dev = ieee->dev;
246 u16 fc, ethertype;
247 struct rtllib_hdr_4addr *hdr;
248 u8 *pos;
249
250 if (skb->len < 24)
251 return 0;
252
253 hdr = (struct rtllib_hdr_4addr *) skb->data;
254 fc = le16_to_cpu(hdr->frame_ctl);
255
256 /* check that the frame is unicast frame to us */
257 if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
258 RTLLIB_FCTL_TODS &&
259 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
260 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
261 /* ToDS frame with own addr BSSID and DA */
262 } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
263 RTLLIB_FCTL_FROMDS &&
264 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
265 /* FromDS frame with own addr as DA */
266 } else
267 return 0;
268
269 if (skb->len < 24 + 8)
270 return 0;
271
272 /* check for port access entity Ethernet type */
273 pos = skb->data + hdrlen;
274 ethertype = (pos[6] << 8) | pos[7];
275 if (ethertype == ETH_P_PAE)
276 return 1;
277
278 return 0;
279 }
280
281 /* Called only as a tasklet (software IRQ), by rtllib_rx */
282 static inline int
283 rtllib_rx_frame_decrypt(struct rtllib_device* ieee, struct sk_buff *skb,
284 struct rtllib_crypt_data *crypt)
285 {
286 struct rtllib_hdr_4addr *hdr;
287 int res, hdrlen;
288
289 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
290 return 0;
291
292 if (ieee->hwsec_active)
293 {
294 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
295 tcb_desc->bHwSec = 1;
296
297 if (ieee->need_sw_enc)
298 tcb_desc->bHwSec = 0;
299 }
300
301 hdr = (struct rtllib_hdr_4addr *) skb->data;
302 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
303
304 atomic_inc(&crypt->refcnt);
305 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
306 atomic_dec(&crypt->refcnt);
307 if (res < 0) {
308 RTLLIB_DEBUG_DROP(
309 "decryption failed (SA=" MAC_FMT
310 ") res=%d\n", MAC_ARG(hdr->addr2), res);
311 if (res == -2)
312 RTLLIB_DEBUG_DROP("Decryption failed ICV "
313 "mismatch (key %d)\n",
314 skb->data[hdrlen + 3] >> 6);
315 ieee->ieee_stats.rx_discards_undecryptable++;
316 return -1;
317 }
318
319 return res;
320 }
321
322
323 /* Called only as a tasklet (software IRQ), by rtllib_rx */
324 static inline int
325 rtllib_rx_frame_decrypt_msdu(struct rtllib_device* ieee, struct sk_buff *skb,
326 int keyidx, struct rtllib_crypt_data *crypt)
327 {
328 struct rtllib_hdr_4addr *hdr;
329 int res, hdrlen;
330
331 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
332 return 0;
333 if (ieee->hwsec_active)
334 {
335 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
336 tcb_desc->bHwSec = 1;
337
338 if (ieee->need_sw_enc)
339 tcb_desc->bHwSec = 0;
340 }
341
342 hdr = (struct rtllib_hdr_4addr *) skb->data;
343 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
344
345 atomic_inc(&crypt->refcnt);
346 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv,ieee);
347 atomic_dec(&crypt->refcnt);
348 if (res < 0) {
349 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
350 " (SA=" MAC_FMT " keyidx=%d)\n",
351 ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
352 return -1;
353 }
354
355 return 0;
356 }
357
358
359 /* this function is stolen from ipw2200 driver*/
360 #define IEEE_PACKET_RETRY_TIME (5*HZ)
361 static int is_duplicate_packet(struct rtllib_device *ieee,
362 struct rtllib_hdr_4addr *header)
363 {
364 u16 fc = le16_to_cpu(header->frame_ctl);
365 u16 sc = le16_to_cpu(header->seq_ctl);
366 u16 seq = WLAN_GET_SEQ_SEQ(sc);
367 u16 frag = WLAN_GET_SEQ_FRAG(sc);
368 u16 *last_seq, *last_frag;
369 unsigned long *last_time;
370 struct rtllib_hdr_3addrqos *hdr_3addrqos;
371 struct rtllib_hdr_4addrqos *hdr_4addrqos;
372 u8 tid;
373
374 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) {
375 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
376 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
377 tid = UP2AC(tid);
378 tid ++;
379 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
380 hdr_3addrqos = (struct rtllib_hdr_3addrqos*)header;
381 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
382 tid = UP2AC(tid);
383 tid ++;
384 } else {
385 tid = 0;
386 }
387
388 switch (ieee->iw_mode) {
389 case IW_MODE_ADHOC:
390 {
391 struct list_head *p;
392 struct ieee_ibss_seq *entry = NULL;
393 u8 *mac = header->addr2;
394 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
395 list_for_each(p, &ieee->ibss_mac_hash[index]) {
396 entry = list_entry(p, struct ieee_ibss_seq, list);
397 if (!memcmp(entry->mac, mac, ETH_ALEN))
398 break;
399 }
400 if (p == &ieee->ibss_mac_hash[index]) {
401 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
402 if (!entry) {
403 printk(KERN_WARNING "Cannot malloc new mac entry\n");
404 return 0;
405 }
406 memcpy(entry->mac, mac, ETH_ALEN);
407 entry->seq_num[tid] = seq;
408 entry->frag_num[tid] = frag;
409 entry->packet_time[tid] = jiffies;
410 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
411 return 0;
412 }
413 last_seq = &entry->seq_num[tid];
414 last_frag = &entry->frag_num[tid];
415 last_time = &entry->packet_time[tid];
416 break;
417 }
418
419 case IW_MODE_INFRA:
420 last_seq = &ieee->last_rxseq_num[tid];
421 last_frag = &ieee->last_rxfrag_num[tid];
422 last_time = &ieee->last_packet_time[tid];
423 break;
424 default:
425 return 0;
426 }
427
428 if ((*last_seq == seq) &&
429 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
430 if (*last_frag == frag){
431 goto drop;
432
433 }
434 if (*last_frag + 1 != frag)
435 /* out-of-order fragment */
436 goto drop;
437 } else
438 *last_seq = seq;
439
440 *last_frag = frag;
441 *last_time = jiffies;
442 return 0;
443
444 drop:
445
446 return 1;
447 }
448 bool
449 AddReorderEntry(
450 struct rx_ts_record *pTS,
451 struct rx_reorder_entry *pReorderEntry
452 )
453 {
454 struct list_head *pList = &pTS->RxPendingPktList;
455
456 while(pList->next != &pTS->RxPendingPktList)
457 {
458 if ( SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)list_entry(pList->next,struct rx_reorder_entry,List))->SeqNum) )
459 {
460 pList = pList->next;
461 }
462 else if ( SN_EQUAL(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)list_entry(pList->next,struct rx_reorder_entry,List))->SeqNum) )
463 {
464 return false;
465 }
466 else
467 {
468 break;
469 }
470 }
471 pReorderEntry->List.next = pList->next;
472 pReorderEntry->List.next->prev = &pReorderEntry->List;
473 pReorderEntry->List.prev = pList;
474 pList->next = &pReorderEntry->List;
475
476 return true;
477 }
478
479 void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb** prxbIndicateArray,u8 index)
480 {
481 struct net_device_stats *stats = &ieee->stats;
482 u8 i = 0 , j=0;
483 u16 ethertype;
484 for (j = 0; j < index; j++) {
485 struct rtllib_rxb* prxb = prxbIndicateArray[j];
486 for (i = 0; i<prxb->nr_subframes; i++) {
487 struct sk_buff *sub_skb = prxb->subframes[i];
488
489 /* convert hdr + possible LLC headers into Ethernet header */
490 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
491 if (sub_skb->len >= 8 &&
492 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
493 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
494 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
495 /* remove RFC1042 or Bridge-Tunnel encapsulation and
496 * replace EtherType */
497 skb_pull(sub_skb, SNAP_SIZE);
498 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
499 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
500 } else {
501 u16 len;
502 /* Leave Ethernet header part of hdr and full payload */
503 len = htons(sub_skb->len);
504 memcpy(skb_push(sub_skb, 2), &len, 2);
505 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
506 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
507 }
508
509 /* Indicat the packets to upper layer */
510 if (sub_skb) {
511 stats->rx_packets++;
512 stats->rx_bytes += sub_skb->len;
513
514 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
515 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
516 sub_skb->dev = ieee->dev;
517 sub_skb->dev->stats.rx_packets++;
518 sub_skb->dev->stats.rx_bytes += sub_skb->len;
519 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
520 ieee->last_rx_ps_time = jiffies;
521 netif_rx(sub_skb);
522 }
523 }
524 kfree(prxb);
525 prxb = NULL;
526 }
527 }
528
529 void
530 rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, struct rx_ts_record *pTS)
531 {
532 struct rx_reorder_entry *pRxReorderEntry;
533 struct rtllib_rxb* RfdArray[REORDER_WIN_SIZE];
534 u8 RfdCnt = 0;
535
536
537 del_timer_sync(&pTS->RxPktPendingTimer);
538 while(!list_empty(&pTS->RxPendingPktList))
539 {
540 if (RfdCnt >= REORDER_WIN_SIZE){
541 printk("-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", __func__);
542 break;
543 }
544
545 pRxReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,struct rx_reorder_entry,List);
546 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Indicate SeqNum %d!\n",__func__, pRxReorderEntry->SeqNum);
547 list_del_init(&pRxReorderEntry->List);
548
549 RfdArray[RfdCnt] = pRxReorderEntry->prxb;
550
551 RfdCnt = RfdCnt + 1;
552 list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
553 }
554 rtllib_indicate_packets(ieee, RfdArray, RfdCnt);
555
556 pTS->RxIndicateSeq = 0xffff;
557 }
558
559
560 void RxReorderIndicatePacket( struct rtllib_device *ieee,
561 struct rtllib_rxb* prxb,
562 struct rx_ts_record *pTS,
563 u16 SeqNum)
564 {
565 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
566 struct rx_reorder_entry *pReorderEntry = NULL;
567 struct rtllib_rxb* prxbIndicateArray[REORDER_WIN_SIZE];
568 u8 WinSize = pHTInfo->RxReorderWinSize;
569 u16 WinEnd = 0;
570 u8 index = 0;
571 bool bMatchWinStart = false, bPktInBuf = false;
572 unsigned long flags;
573
574 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__func__,SeqNum,pTS->RxIndicateSeq,WinSize);
575
576 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
577
578 WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
579 /* Rx Reorder initialize condition.*/
580 if (pTS->RxIndicateSeq == 0xffff) {
581 pTS->RxIndicateSeq = SeqNum;
582 }
583
584 /* Drop out the packet which SeqNum is smaller than WinStart */
585 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
586 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
587 pTS->RxIndicateSeq, SeqNum);
588 pHTInfo->RxReorderDropCounter++;
589 {
590 int i;
591 for (i =0; i < prxb->nr_subframes; i++) {
592 dev_kfree_skb(prxb->subframes[i]);
593 }
594 kfree(prxb);
595 prxb = NULL;
596 }
597 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
598 return;
599 }
600
601 /*
602 * Sliding window manipulation. Conditions includes:
603 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
604 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
605 */
606 if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
607 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
608 bMatchWinStart = true;
609 } else if (SN_LESS(WinEnd, SeqNum)) {
610 if (SeqNum >= (WinSize - 1)) {
611 pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
612 } else {
613 pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
614 }
615 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
616 }
617
618 /*
619 * Indication process.
620 * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
621 * with the SeqNum smaller than latest WinStart and struct buffer other packets.
622 */
623 /* For Rx Reorder condition:
624 * 1. All packets with SeqNum smaller than WinStart => Indicate
625 * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
626 */
627 if (bMatchWinStart) {
628 /* Current packet is going to be indicated.*/
629 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
630 pTS->RxIndicateSeq, SeqNum);
631 prxbIndicateArray[0] = prxb;
632 index = 1;
633 } else {
634 /* Current packet is going to be inserted into pending list.*/
635 if (!list_empty(&ieee->RxReorder_Unused_List)) {
636 pReorderEntry = (struct rx_reorder_entry *)list_entry(ieee->RxReorder_Unused_List.next,struct rx_reorder_entry,List);
637 list_del_init(&pReorderEntry->List);
638
639 /* Make a reorder entry and insert into a the packet list.*/
640 pReorderEntry->SeqNum = SeqNum;
641 pReorderEntry->prxb = prxb;
642
643 if (!AddReorderEntry(pTS, pReorderEntry)) {
644 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
645 __func__, pTS->RxIndicateSeq, SeqNum);
646 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
647 {
648 int i;
649 for (i =0; i < prxb->nr_subframes; i++) {
650 dev_kfree_skb(prxb->subframes[i]);
651 }
652 kfree(prxb);
653 prxb = NULL;
654 }
655 } else {
656 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
657 "Pkt insert into struct buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
658 }
659 }
660 else {
661 /*
662 * Packets are dropped if there is not enough reorder entries.
663 * This part shall be modified!! We can just indicate all the
664 * packets in struct buffer and get reorder entries.
665 */
666 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
667 {
668 int i;
669 for (i =0; i < prxb->nr_subframes; i++) {
670 dev_kfree_skb(prxb->subframes[i]);
671 }
672 kfree(prxb);
673 prxb = NULL;
674 }
675 }
676 }
677
678 /* Check if there is any packet need indicate.*/
679 while(!list_empty(&pTS->RxPendingPktList)) {
680 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): start RREORDER indicate\n",__func__);
681
682 pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,struct rx_reorder_entry,List);
683 if ( SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
684 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
685 {
686 /* This protect struct buffer from overflow. */
687 if (index >= REORDER_WIN_SIZE) {
688 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
689 bPktInBuf = true;
690 break;
691 }
692
693 list_del_init(&pReorderEntry->List);
694
695 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
696 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
697
698 prxbIndicateArray[index] = pReorderEntry->prxb;
699 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Indicate SeqNum %d!\n",__func__, pReorderEntry->SeqNum);
700 index++;
701
702 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
703 } else {
704 bPktInBuf = true;
705 break;
706 }
707 }
708
709 /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
710 if (index>0) {
711 if (timer_pending(&pTS->RxPktPendingTimer)){
712 del_timer_sync(&pTS->RxPktPendingTimer);
713 }
714 pTS->RxTimeoutIndicateSeq = 0xffff;
715
716 if (index>REORDER_WIN_SIZE){
717 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer struct buffer full!! \n");
718 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
719 return;
720 }
721 rtllib_indicate_packets(ieee, prxbIndicateArray, index);
722 bPktInBuf = false;
723 }
724
725 if (bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
726 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): SET rx timeout timer\n", __func__);
727 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
728 mod_timer(&pTS->RxPktPendingTimer, jiffies + MSECS(pHTInfo->RxReorderPendingTime));
729 }
730 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
731 }
732
733 u8 parse_subframe(struct rtllib_device* ieee,struct sk_buff *skb,
734 struct rtllib_rx_stats *rx_stats,
735 struct rtllib_rxb *rxb,u8* src,u8* dst)
736 {
737 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr* )skb->data;
738 u16 fc = le16_to_cpu(hdr->frame_ctl);
739
740 u16 LLCOffset= sizeof(struct rtllib_hdr_3addr);
741 u16 ChkLength;
742 bool bIsAggregateFrame = false;
743 u16 nSubframe_Length;
744 u8 nPadding_Length = 0;
745 u16 SeqNum=0;
746 struct sk_buff *sub_skb;
747 u8 *data_ptr;
748 /* just for debug purpose */
749 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
750 if ((RTLLIB_QOS_HAS_SEQ(fc))&&\
751 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved)) {
752 bIsAggregateFrame = true;
753 }
754
755 if (RTLLIB_QOS_HAS_SEQ(fc)) {
756 LLCOffset += 2;
757 }
758 if (rx_stats->bContainHTC) {
759 LLCOffset += sHTCLng;
760 }
761
762 ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
763
764 if ( skb->len <= ChkLength ) {
765 return 0;
766 }
767
768 skb_pull(skb, LLCOffset);
769 ieee->bIsAggregateFrame = bIsAggregateFrame;
770 if (!bIsAggregateFrame) {
771 rxb->nr_subframes = 1;
772
773 /* altered by clark 3/30/2010
774 * The struct buffer size of the skb indicated to upper layer
775 * must be less than 5000, or the defraged IP datagram
776 * in the IP layer will exceed "ipfrag_high_tresh" and be
777 * discarded. so there must not use the function
778 * "skb_copy" and "skb_clone" for "skb".
779 */
780
781 /* Allocate new skb for releasing to upper layer */
782 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
783 skb_reserve(sub_skb, 12);
784 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
785 memcpy(data_ptr, skb->data, skb->len);
786 sub_skb->dev = ieee->dev;
787
788 rxb->subframes[0] = sub_skb;
789
790 memcpy(rxb->src,src,ETH_ALEN);
791 memcpy(rxb->dst,dst,ETH_ALEN);
792 rxb->subframes[0]->dev = ieee->dev;
793 return 1;
794 } else {
795 rxb->nr_subframes = 0;
796 memcpy(rxb->src,src,ETH_ALEN);
797 memcpy(rxb->dst,dst,ETH_ALEN);
798 while(skb->len > ETHERNET_HEADER_SIZE) {
799 /* Offset 12 denote 2 mac address */
800 nSubframe_Length = *((u16*)(skb->data + 12));
801 nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
802
803 if (skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
804 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
805 __func__,rxb->nr_subframes);
806 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__func__, nSubframe_Length);
807 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
808 printk("The Packet SeqNum is %d\n",SeqNum);
809 return 0;
810 }
811
812 /* move the data point to data content */
813 skb_pull(skb, ETHERNET_HEADER_SIZE);
814
815 /* altered by clark 3/30/2010
816 * The struct buffer size of the skb indicated to upper layer
817 * must be less than 5000, or the defraged IP datagram
818 * in the IP layer will exceed "ipfrag_high_tresh" and be
819 * discarded. so there must not use the function
820 * "skb_copy" and "skb_clone" for "skb".
821 */
822
823 /* Allocate new skb for releasing to upper layer */
824 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
825 skb_reserve(sub_skb, 12);
826 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
827 memcpy(data_ptr,skb->data,nSubframe_Length);
828
829 sub_skb->dev = ieee->dev;
830 rxb->subframes[rxb->nr_subframes++] = sub_skb;
831 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
832 RTLLIB_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
833 break;
834 }
835 skb_pull(skb,nSubframe_Length);
836
837 if (skb->len != 0) {
838 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
839 if (nPadding_Length == 4) {
840 nPadding_Length = 0;
841 }
842
843 if (skb->len < nPadding_Length) {
844 return 0;
845 }
846
847 skb_pull(skb,nPadding_Length);
848 }
849 }
850
851 return rxb->nr_subframes;
852 }
853 }
854
855
856 size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee, struct sk_buff *skb,
857 struct rtllib_rx_stats *rx_stats)
858 {
859 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
860 u16 fc = le16_to_cpu(hdr->frame_ctl);
861 size_t hdrlen = 0;
862
863 hdrlen = rtllib_get_hdrlen(fc);
864 if (HTCCheck(ieee, skb->data)) {
865 if (net_ratelimit())
866 printk("%s: find HTCControl!\n", __func__);
867 hdrlen += 4;
868 rx_stats->bContainHTC = 1;
869 }
870
871 if (RTLLIB_QOS_HAS_SEQ(fc))
872 rx_stats->bIsQosData = 1;
873
874 return hdrlen;
875 }
876
877 int rtllib_rx_check_duplicate(struct rtllib_device *ieee, struct sk_buff *skb, u8 multicast)
878 {
879 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
880 u16 fc, sc;
881 u8 frag, type, stype;
882
883 fc = le16_to_cpu(hdr->frame_ctl);
884 type = WLAN_FC_GET_TYPE(fc);
885 stype = WLAN_FC_GET_STYPE(fc);
886 sc = le16_to_cpu(hdr->seq_ctl);
887 frag = WLAN_GET_SEQ_FRAG(sc);
888
889 if ( (ieee->pHTInfo->bCurRxReorderEnable == false) ||
890 !ieee->current_network.qos_data.active ||
891 !IsDataFrame(skb->data) ||
892 IsLegacyDataFrame(skb->data)) {
893 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))){
894 if (is_duplicate_packet(ieee, hdr)){
895 return -1;
896 }
897 }
898 } else {
899 struct rx_ts_record *pRxTS = NULL;
900 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
901 (u8)Frame_QoSTID((u8*)(skb->data)), RX_DIR, true)) {
902 if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
903 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) {
904 return -1;
905 } else {
906 pRxTS->RxLastFragNum = frag;
907 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
908 }
909 } else {
910 RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip the check!!\n",__func__);
911 return -1;
912 }
913 }
914
915 return 0;
916 }
917 void rtllib_rx_extract_addr(struct rtllib_device *ieee, struct rtllib_hdr_4addr *hdr, u8 *dst, u8 *src, u8 *bssid)
918 {
919 u16 fc = le16_to_cpu(hdr->frame_ctl);
920
921 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
922 case RTLLIB_FCTL_FROMDS:
923 memcpy(dst, hdr->addr1, ETH_ALEN);
924 memcpy(src, hdr->addr3, ETH_ALEN);
925 memcpy(bssid, hdr->addr2, ETH_ALEN);
926 break;
927 case RTLLIB_FCTL_TODS:
928 memcpy(dst, hdr->addr3, ETH_ALEN);
929 memcpy(src, hdr->addr2, ETH_ALEN);
930 memcpy(bssid, hdr->addr1, ETH_ALEN);
931 break;
932 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
933 memcpy(dst, hdr->addr3, ETH_ALEN);
934 memcpy(src, hdr->addr4, ETH_ALEN);
935 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
936 break;
937 case 0:
938 memcpy(dst, hdr->addr1, ETH_ALEN);
939 memcpy(src, hdr->addr2, ETH_ALEN);
940 memcpy(bssid, hdr->addr3, ETH_ALEN);
941 break;
942 }
943 }
944 int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc, u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
945 {
946 u8 zero_addr[ETH_ALEN] = {0};
947 u8 type, stype;
948
949 type = WLAN_FC_GET_TYPE(fc);
950 stype = WLAN_FC_GET_STYPE(fc);
951
952 /* Filter frames from different BSS */
953 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS)
954 && (compare_ether_addr(ieee->current_network.bssid, bssid) != 0)
955 && memcmp(ieee->current_network.bssid, zero_addr, ETH_ALEN)) {
956 return -1;
957 }
958
959 /* Filter packets sent by an STA that will be forwarded by AP */
960 if ( ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
961 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame ) {
962 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
963 (compare_ether_addr(dst, ieee->current_network.bssid) != 0) &&
964 (compare_ether_addr(bssid, ieee->current_network.bssid) == 0)) {
965 return -1;
966 }
967 }
968
969 /* Nullfunc frames may have PS-bit set, so they must be passed to
970 * hostap_handle_sta_rx() before being dropped here. */
971 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn){
972 if (stype != RTLLIB_STYPE_DATA &&
973 stype != RTLLIB_STYPE_DATA_CFACK &&
974 stype != RTLLIB_STYPE_DATA_CFPOLL &&
975 stype != RTLLIB_STYPE_DATA_CFACKPOLL&&
976 stype != RTLLIB_STYPE_QOS_DATA
977 ) {
978 if (stype != RTLLIB_STYPE_NULLFUNC)
979 RTLLIB_DEBUG_DROP(
980 "RX: dropped data frame "
981 "with no data (type=0x%02x, "
982 "subtype=0x%02x)\n",
983 type, stype);
984 return -1;
985 }
986 }
987
988 if (ieee->iw_mode != IW_MODE_MESH) {
989 /* packets from our adapter are dropped (echo) */
990 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
991 return -1;
992
993 /* {broad,multi}cast packets to our BSS go through */
994 if (is_multicast_ether_addr(dst) || is_broadcast_ether_addr(dst)) {
995 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN)) {
996 return -1;
997 }
998 }
999 }
1000 return 0;
1001 }
1002 int rtllib_rx_get_crypt(
1003 struct rtllib_device *ieee,
1004 struct sk_buff *skb,
1005 struct rtllib_crypt_data **crypt,
1006 size_t hdrlen)
1007 {
1008 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1009 u16 fc = le16_to_cpu(hdr->frame_ctl);
1010 int idx = 0;
1011
1012 if (ieee->host_decrypt) {
1013 if (skb->len >= hdrlen + 3)
1014 idx = skb->data[hdrlen + 3] >> 6;
1015
1016 *crypt = ieee->crypt[idx];
1017 /* allow NULL decrypt to indicate an station specific override
1018 * for default encryption */
1019 if (*crypt && ((*crypt)->ops == NULL ||
1020 (*crypt)->ops->decrypt_mpdu == NULL))
1021 *crypt = NULL;
1022
1023 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1024 /* This seems to be triggered by some (multicast?)
1025 * frames from other than current BSS, so just drop the
1026 * frames silently instead of filling system log with
1027 * these reports. */
1028 RTLLIB_DEBUG_DROP("Decryption failed (not set)"
1029 " (SA=" MAC_FMT ")\n",
1030 MAC_ARG(hdr->addr2));
1031 ieee->ieee_stats.rx_discards_undecryptable++;
1032 return -1;
1033 }
1034 }
1035
1036 return 0;
1037 }
1038 int rtllib_rx_decrypt(
1039 struct rtllib_device *ieee,
1040 struct sk_buff *skb,
1041 struct rtllib_rx_stats *rx_stats,
1042 struct rtllib_crypt_data *crypt,
1043 size_t hdrlen)
1044 {
1045 struct rtllib_hdr_4addr *hdr;
1046 int keyidx = 0;
1047 u16 fc, sc;
1048 u8 frag;
1049
1050 hdr = (struct rtllib_hdr_4addr *)skb->data;
1051 fc = le16_to_cpu(hdr->frame_ctl);
1052 sc = le16_to_cpu(hdr->seq_ctl);
1053 frag = WLAN_GET_SEQ_FRAG(sc);
1054
1055 if ((!rx_stats->Decrypted)){
1056 ieee->need_sw_enc = 1;
1057 }else{
1058 ieee->need_sw_enc = 0;
1059 }
1060
1061 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1062 ((keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt)) < 0)) {
1063 printk("%s: decrypt frame error\n", __func__);
1064 return -1;
1065 }
1066
1067 hdr = (struct rtllib_hdr_4addr *) skb->data;
1068 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1069 int flen;
1070 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1071 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1072
1073 if (!frag_skb) {
1074 RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1075 "Rx cannot get skb from fragment "
1076 "cache (morefrag=%d seq=%u frag=%u)\n",
1077 (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1078 WLAN_GET_SEQ_SEQ(sc), frag);
1079 return -1;
1080 }
1081 flen = skb->len;
1082 if (frag != 0)
1083 flen -= hdrlen;
1084
1085 if (frag_skb->tail + flen > frag_skb->end) {
1086 printk(KERN_WARNING "%s: host decrypted and "
1087 "reassembled frame did not fit skb\n",
1088 __func__);
1089 rtllib_frag_cache_invalidate(ieee, hdr);
1090 return -1;
1091 }
1092
1093 if (frag == 0) {
1094 /* copy first fragment (including full headers) into
1095 * beginning of the fragment cache skb */
1096 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1097 } else {
1098 /* append frame payload to the end of the fragment
1099 * cache skb */
1100 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1101 flen);
1102 }
1103 dev_kfree_skb_any(skb);
1104 skb = NULL;
1105
1106 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1107 /* more fragments expected - leave the skb in fragment
1108 * cache for now; it will be delivered to upper layers
1109 * after all fragments have been received */
1110 return -2;
1111 }
1112
1113 /* this was the last fragment and the frame will be
1114 * delivered, so remove skb from fragment cache */
1115 skb = frag_skb;
1116 hdr = (struct rtllib_hdr_4addr *) skb->data;
1117 rtllib_frag_cache_invalidate(ieee, hdr);
1118 }
1119
1120 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1121 * encrypted/authenticated */
1122 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1123 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1124 {
1125 printk("%s: ==>decrypt msdu error\n", __func__);
1126 return -1;
1127 }
1128
1129 hdr = (struct rtllib_hdr_4addr *) skb->data;
1130 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1131 if (/*ieee->ieee802_1x &&*/
1132 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1133
1134 /* pass unencrypted EAPOL frames even if encryption is
1135 * configured */
1136 struct eapol *eap = (struct eapol *)(skb->data +
1137 24);
1138 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1139 eap_get_type(eap->type));
1140 } else {
1141 RTLLIB_DEBUG_DROP(
1142 "encryption configured, but RX "
1143 "frame not encrypted (SA=" MAC_FMT ")\n",
1144 MAC_ARG(hdr->addr2));
1145 return -1;
1146 }
1147 }
1148
1149 if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1150 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1151 struct eapol *eap = (struct eapol *)(skb->data +
1152 24);
1153 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1154 eap_get_type(eap->type));
1155 }
1156
1157 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1158 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1159 RTLLIB_DEBUG_DROP(
1160 "dropped unencrypted RX data "
1161 "frame from " MAC_FMT
1162 " (drop_unencrypted=1)\n",
1163 MAC_ARG(hdr->addr2));
1164 return -1;
1165 }
1166
1167 if (rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1168 printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n");
1169 }
1170
1171 return 0;
1172 }
1173 void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
1174 {
1175 if (unicast){
1176
1177 if ((ieee->state == RTLLIB_LINKED) /*&& !MgntInitAdapterInProgress(pMgntInfo)*/)
1178 {
1179 if ( ((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +ieee->LinkDetectInfo.NumTxOkInPeriod) > 8 ) ||
1180 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2) )
1181 {
1182 if (ieee->LeisurePSLeave)
1183 ieee->LeisurePSLeave(ieee->dev);
1184 }
1185 }
1186 }
1187 ieee->last_rx_ps_time = jiffies;
1188 }
1189 void rtllib_rx_indicate_pkt_legacy(
1190 struct rtllib_device *ieee,
1191 struct rtllib_rx_stats *rx_stats,
1192 struct rtllib_rxb* rxb,
1193 u8 *dst,
1194 u8 *src)
1195 {
1196 struct net_device *dev = ieee->dev;
1197 u16 ethertype;
1198 int i = 0;
1199
1200 if (rxb == NULL){
1201 printk("%s: rxb is NULL!!\n", __func__);
1202 return ;
1203 }
1204
1205 for (i = 0; i<rxb->nr_subframes; i++) {
1206 struct sk_buff *sub_skb = rxb->subframes[i];
1207
1208 if (sub_skb) {
1209 /* convert hdr + possible LLC headers into Ethernet header */
1210 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1211 if (sub_skb->len >= 8 &&
1212 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1213 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1214 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1215 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1216 * replace EtherType */
1217 skb_pull(sub_skb, SNAP_SIZE);
1218 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1219 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1220 } else {
1221 u16 len;
1222 /* Leave Ethernet header part of hdr and full payload */
1223 len = htons(sub_skb->len);
1224 memcpy(skb_push(sub_skb, 2), &len, 2);
1225 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1226 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1227 }
1228
1229 ieee->stats.rx_packets++;
1230 ieee->stats.rx_bytes += sub_skb->len;
1231
1232 if (is_multicast_ether_addr(dst)) {
1233 ieee->stats.multicast++;
1234 }
1235
1236 /* Indicat the packets to upper layer */
1237 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1238 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1239 sub_skb->dev = dev;
1240 sub_skb->dev->stats.rx_packets++;
1241 sub_skb->dev->stats.rx_bytes += sub_skb->len;
1242 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1243 netif_rx(sub_skb);
1244 }
1245 }
1246 kfree(rxb);
1247 rxb = NULL;
1248 }
1249 int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1250 struct rtllib_rx_stats *rx_stats)
1251 {
1252 struct net_device *dev = ieee->dev;
1253 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1254 struct rtllib_crypt_data *crypt = NULL;
1255 struct rtllib_rxb* rxb = NULL;
1256 struct rx_ts_record *pTS = NULL;
1257 u16 fc, sc, SeqNum = 0;
1258 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1259 u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
1260 size_t hdrlen = 0;
1261 bool bToOtherSTA = false;
1262 int ret = 0, i = 0;
1263
1264 hdr = (struct rtllib_hdr_4addr *)skb->data;
1265 fc = le16_to_cpu(hdr->frame_ctl);
1266 type = WLAN_FC_GET_TYPE(fc);
1267 stype = WLAN_FC_GET_STYPE(fc);
1268 sc = le16_to_cpu(hdr->seq_ctl);
1269
1270 /*Filter pkt not to me*/
1271 multicast = is_multicast_ether_addr(hdr->addr1)|is_broadcast_ether_addr(hdr->addr1);
1272 unicast = !multicast;
1273 if (unicast && (compare_ether_addr(dev->dev_addr, hdr->addr1) != 0)) {
1274 if (ieee->bNetPromiscuousMode)
1275 bToOtherSTA = true;
1276 else
1277 goto rx_dropped;
1278 }
1279
1280 /*Filter pkt has too small length */
1281 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1282 if (skb->len < hdrlen){
1283 printk("%s():ERR!!! skb->len is smaller than hdrlen\n",__func__);
1284 goto rx_dropped;
1285 }
1286
1287 /* Filter Duplicate pkt */
1288 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1289 if (ret < 0)
1290 goto rx_dropped;
1291
1292 /* Filter CTRL Frame */
1293 if (type == RTLLIB_FTYPE_CTL) {
1294 goto rx_dropped;
1295 }
1296
1297 /* Filter MGNT Frame */
1298 if (type == RTLLIB_FTYPE_MGMT) {
1299 if (bToOtherSTA)
1300 goto rx_dropped;
1301 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1302 goto rx_dropped;
1303 else
1304 goto rx_exit;
1305 }
1306
1307 /* Filter WAPI DATA Frame */
1308
1309 /* Update statstics for AP roaming */
1310 if (!bToOtherSTA){
1311 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1312 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1313 }
1314 dev->last_rx = jiffies;
1315
1316 /* Data frame - extract src/dst addresses */
1317 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1318
1319 /* Filter Data frames */
1320 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1321 if (ret < 0)
1322 goto rx_dropped;
1323
1324 if (skb->len == hdrlen){
1325 goto rx_dropped;
1326 }
1327
1328 /* Send pspoll based on moredata */
1329 if ((ieee->iw_mode == IW_MODE_INFRA) && (ieee->sta_sleep == LPS_IS_SLEEP)
1330 && (ieee->polling) && (!bToOtherSTA)) {
1331 if (WLAN_FC_MORE_DATA(fc)) {
1332 /* more data bit is set, let's request a new frame from the AP */
1333 rtllib_sta_ps_send_pspoll_frame(ieee);
1334 } else {
1335 ieee->polling = false;
1336 }
1337 }
1338
1339 /* Get crypt if encrypted */
1340 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1341 if (ret == -1)
1342 goto rx_dropped;
1343
1344 /* Decrypt data frame (including reassemble) */
1345 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1346 if (ret == -1)
1347 goto rx_dropped;
1348 else if (ret == -2)
1349 goto rx_exit;
1350
1351 /* Get TS for Rx Reorder */
1352 hdr = (struct rtllib_hdr_4addr *) skb->data;
1353 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1354 && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1)
1355 && (!bToOtherSTA))
1356 {
1357 TID = Frame_QoSTID(skb->data);
1358 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1359 GetTs(ieee,(struct ts_common_info **) &pTS,hdr->addr2,TID,RX_DIR,true);
1360 if (TID !=0 && TID !=3){
1361 ieee->bis_any_nonbepkts = true;
1362 }
1363 }
1364
1365 /* Parse rx data frame (For AMSDU) */
1366 /* skb: hdr + (possible reassembled) full plaintext payload */
1367 payload = skb->data + hdrlen;
1368 rxb = (struct rtllib_rxb*)kmalloc(sizeof(struct rtllib_rxb),GFP_ATOMIC);
1369 if (rxb == NULL)
1370 {
1371 RTLLIB_DEBUG(RTLLIB_DL_ERR,"%s(): kmalloc rxb error\n",__func__);
1372 goto rx_dropped;
1373 }
1374 /* to parse amsdu packets */
1375 /* qos data packets & reserved bit is 1 */
1376 if (parse_subframe(ieee,skb,rx_stats,rxb,src,dst) == 0) {
1377 /* only to free rxb, and not submit the packets to upper layer */
1378 for (i =0; i < rxb->nr_subframes; i++) {
1379 dev_kfree_skb(rxb->subframes[i]);
1380 }
1381 kfree(rxb);
1382 rxb = NULL;
1383 goto rx_dropped;
1384 }
1385
1386 /* Update WAPI PN */
1387
1388 /* Check if leave LPS */
1389 if (!bToOtherSTA){
1390 if (ieee->bIsAggregateFrame)
1391 nr_subframes = rxb->nr_subframes;
1392 else
1393 nr_subframes = 1;
1394 if (unicast)
1395 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1396 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1397 }
1398
1399 /* Indicate packets to upper layer or Rx Reorder */
1400 if (ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL || bToOtherSTA){
1401 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1402 }else{
1403 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1404 }
1405
1406 dev_kfree_skb(skb);
1407
1408 rx_exit:
1409 return 1;
1410
1411 rx_dropped:
1412 if (rxb != NULL)
1413 {
1414 kfree(rxb);
1415 rxb = NULL;
1416 }
1417 ieee->stats.rx_dropped++;
1418
1419 /* Returning 0 indicates to caller that we have not handled the SKB--
1420 * so it is still allocated and can be used again by underlying
1421 * hardware as a DMA target */
1422 return 0;
1423 }
1424
1425 int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1426 struct rtllib_rx_stats *rx_stats)
1427 {
1428 return 0;
1429 }
1430 int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1431 struct rtllib_rx_stats *rx_stats)
1432 {
1433 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1434 u16 fc = le16_to_cpu(hdr->frame_ctl);
1435 size_t hdrlen = rtllib_get_hdrlen(fc);
1436
1437 if (skb->len < hdrlen){
1438 printk("%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1439 return 0;
1440 }
1441
1442 if (HTCCheck(ieee, skb->data)) {
1443 if (net_ratelimit())
1444 printk("%s: Find HTCControl!\n", __func__);
1445 hdrlen += 4;
1446 }
1447
1448 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1449 ieee->stats.rx_packets++;
1450 ieee->stats.rx_bytes += skb->len;
1451
1452 return 1;
1453 }
1454
1455 int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1456 struct rtllib_rx_stats *rx_stats)
1457 {
1458 return 0;
1459 }
1460
1461 /* All received frames are sent to this function. @skb contains the frame in
1462 * IEEE 802.11 format, i.e., in the format it was sent over air.
1463 * This function is called only as a tasklet (software IRQ). */
1464 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1465 struct rtllib_rx_stats *rx_stats)
1466 {
1467 int ret = 0;
1468
1469 if ((NULL==ieee) || (NULL==skb) || (NULL==rx_stats)){
1470 printk(KERN_INFO "%s: Input parameters NULL!\n", __func__);
1471 goto rx_dropped;
1472 }
1473 if (skb->len < 10) {
1474 printk(KERN_INFO "%s: SKB length < 10 \n", __func__);
1475 goto rx_dropped;
1476 }
1477
1478 switch (ieee->iw_mode) {
1479 case IW_MODE_ADHOC:
1480 case IW_MODE_INFRA:
1481 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1482 break;
1483 case IW_MODE_MASTER:
1484 case IW_MODE_REPEAT:
1485 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1486 break;
1487 case IW_MODE_MONITOR:
1488 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1489 break;
1490 case IW_MODE_MESH:
1491 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1492 break;
1493 default:
1494 printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__);
1495 break;
1496 }
1497
1498 return ret;
1499
1500 rx_dropped:
1501 ieee->stats.rx_dropped++;
1502 return 0;
1503 }
1504
1505 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1506
1507 /*
1508 * Make ther structure we read from the beacon packet has
1509 * the right values
1510 */
1511 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1512 *info_element, int sub_type)
1513 {
1514
1515 if (info_element->qui_subtype != sub_type)
1516 return -1;
1517 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1518 return -1;
1519 if (info_element->qui_type != QOS_OUI_TYPE)
1520 return -1;
1521 if (info_element->version != QOS_VERSION_1)
1522 return -1;
1523
1524 return 0;
1525 }
1526
1527
1528 /*
1529 * Parse a QoS parameter element
1530 */
1531 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1532 *element_param, struct rtllib_info_element
1533 *info_element)
1534 {
1535 int ret = 0;
1536 u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1537
1538 if ((info_element == NULL) || (element_param == NULL))
1539 return -1;
1540
1541 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1542 memcpy(element_param->info_element.qui, info_element->data,
1543 info_element->len);
1544 element_param->info_element.elementID = info_element->id;
1545 element_param->info_element.length = info_element->len;
1546 } else
1547 ret = -1;
1548 if (ret == 0)
1549 ret = rtllib_verify_qos_info(&element_param->info_element,
1550 QOS_OUI_PARAM_SUB_TYPE);
1551 return ret;
1552 }
1553
1554 /*
1555 * Parse a QoS information element
1556 */
1557 static int rtllib_read_qos_info_element(struct
1558 rtllib_qos_information_element
1559 *element_info, struct rtllib_info_element
1560 *info_element)
1561 {
1562 int ret = 0;
1563 u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1564
1565 if (element_info == NULL)
1566 return -1;
1567 if (info_element == NULL)
1568 return -1;
1569
1570 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1571 memcpy(element_info->qui, info_element->data,
1572 info_element->len);
1573 element_info->elementID = info_element->id;
1574 element_info->length = info_element->len;
1575 } else
1576 ret = -1;
1577
1578 if (ret == 0)
1579 ret = rtllib_verify_qos_info(element_info,
1580 QOS_OUI_INFO_SUB_TYPE);
1581 return ret;
1582 }
1583
1584
1585 /*
1586 * Write QoS parameters from the ac parameters.
1587 */
1588 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1589 struct rtllib_qos_data *qos_data)
1590 {
1591 struct rtllib_qos_ac_parameter *ac_params;
1592 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1593 int rc = 0;
1594 int i;
1595 u8 aci;
1596 u8 acm;
1597
1598 qos_data->wmm_acm = 0;
1599 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1600 ac_params = &(param_elm->ac_params_record[i]);
1601
1602 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1603 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1604
1605 if (aci >= QOS_QUEUE_NUM)
1606 continue;
1607 switch (aci) {
1608 case 1:
1609 /* BIT(0) | BIT(3) */
1610 if (acm)
1611 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1612 break;
1613 case 2:
1614 /* BIT(4) | BIT(5) */
1615 if (acm)
1616 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1617 break;
1618 case 3:
1619 /* BIT(6) | BIT(7) */
1620 if (acm)
1621 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1622 break;
1623 case 0:
1624 default:
1625 /* BIT(1) | BIT(2) */
1626 if (acm)
1627 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1628 break;
1629 }
1630
1631 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1632
1633 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1634 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1635
1636 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1637
1638 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1639
1640 qos_param->flag[aci] =
1641 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1642 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1643 }
1644 return rc;
1645 }
1646
1647 /*
1648 * we have a generic data element which it may contain QoS information or
1649 * parameters element. check the information element length to decide
1650 * which type to read
1651 */
1652 static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
1653 *info_element,
1654 struct rtllib_network *network)
1655 {
1656 int rc = 0;
1657 struct rtllib_qos_information_element qos_info_element;
1658
1659 rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1660
1661 if (rc == 0) {
1662 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1663 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1664 } else {
1665 struct rtllib_qos_parameter_info param_element;
1666
1667 rc = rtllib_read_qos_param_element(&param_element,
1668 info_element);
1669 if (rc == 0) {
1670 rtllib_qos_convert_ac_to_parameters(&param_element,
1671 &(network->qos_data));
1672 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1673 network->qos_data.param_count =
1674 param_element.info_element.ac_info & 0x0F;
1675 }
1676 }
1677
1678 if (rc == 0) {
1679 RTLLIB_DEBUG_QOS("QoS is supported\n");
1680 network->qos_data.supported = 1;
1681 }
1682 return rc;
1683 }
1684
1685 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1686
1687 static const char *get_info_element_string(u16 id)
1688 {
1689 switch (id) {
1690 MFIE_STRING(SSID);
1691 MFIE_STRING(RATES);
1692 MFIE_STRING(FH_SET);
1693 MFIE_STRING(DS_SET);
1694 MFIE_STRING(CF_SET);
1695 MFIE_STRING(TIM);
1696 MFIE_STRING(IBSS_SET);
1697 MFIE_STRING(COUNTRY);
1698 MFIE_STRING(HOP_PARAMS);
1699 MFIE_STRING(HOP_TABLE);
1700 MFIE_STRING(REQUEST);
1701 MFIE_STRING(CHALLENGE);
1702 MFIE_STRING(POWER_CONSTRAINT);
1703 MFIE_STRING(POWER_CAPABILITY);
1704 MFIE_STRING(TPC_REQUEST);
1705 MFIE_STRING(TPC_REPORT);
1706 MFIE_STRING(SUPP_CHANNELS);
1707 MFIE_STRING(CSA);
1708 MFIE_STRING(MEASURE_REQUEST);
1709 MFIE_STRING(MEASURE_REPORT);
1710 MFIE_STRING(QUIET);
1711 MFIE_STRING(IBSS_DFS);
1712 MFIE_STRING(RSN);
1713 MFIE_STRING(RATES_EX);
1714 MFIE_STRING(GENERIC);
1715 MFIE_STRING(QOS_PARAMETER);
1716 default:
1717 return "UNKNOWN";
1718 }
1719 }
1720
1721 static inline void rtllib_extract_country_ie(
1722 struct rtllib_device *ieee,
1723 struct rtllib_info_element *info_element,
1724 struct rtllib_network *network,
1725 u8 * addr2)
1726 {
1727 if (IS_DOT11D_ENABLE(ieee)) {
1728 if (info_element->len!= 0) {
1729 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1730 network->CountryIeLen = info_element->len;
1731
1732 if (!IS_COUNTRY_IE_VALID(ieee))
1733 {
1734 if ((rtllib_act_scanning(ieee,false) == true) && (ieee->FirstIe_InScan == 1))
1735 printk("Received beacon ContryIE, SSID: <%s>\n",network->ssid);
1736 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1737 }
1738 }
1739
1740 if (IS_EQUAL_CIE_SRC(ieee, addr2)) {
1741 UPDATE_CIE_WATCHDOG(ieee);
1742 }
1743 }
1744
1745 }
1746
1747 int rtllib_parse_info_param(struct rtllib_device *ieee,
1748 struct rtllib_info_element *info_element,
1749 u16 length,
1750 struct rtllib_network *network,
1751 struct rtllib_rx_stats *stats)
1752 {
1753 u8 i;
1754 short offset;
1755 u16 tmp_htcap_len=0;
1756 u16 tmp_htinfo_len=0;
1757 u16 ht_realtek_agg_len=0;
1758 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1759 char rates_str[64];
1760 char *p;
1761
1762 while (length >= sizeof(*info_element)) {
1763 if (sizeof(*info_element) + info_element->len > length) {
1764 RTLLIB_DEBUG_MGMT("Info elem: parse failed: "
1765 "info_element->len + 2 > left : "
1766 "info_element->len+2=%zd left=%d, id=%d.\n",
1767 info_element->len +
1768 sizeof(*info_element),
1769 length, info_element->id);
1770 /* We stop processing but don't return an error here
1771 * because some misbehaviour APs break this rule. ie.
1772 * Orinoco AP1000. */
1773 break;
1774 }
1775
1776 switch (info_element->id) {
1777 case MFIE_TYPE_SSID:
1778 if (rtllib_is_empty_essid(info_element->data,
1779 info_element->len)) {
1780 network->flags |= NETWORK_EMPTY_ESSID;
1781 break;
1782 }
1783
1784 network->ssid_len = min(info_element->len,
1785 (u8) IW_ESSID_MAX_SIZE);
1786 memcpy(network->ssid, info_element->data, network->ssid_len);
1787 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1788 memset(network->ssid + network->ssid_len, 0,
1789 IW_ESSID_MAX_SIZE - network->ssid_len);
1790
1791 RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1792 network->ssid, network->ssid_len);
1793 break;
1794
1795 case MFIE_TYPE_RATES:
1796 p = rates_str;
1797 network->rates_len = min(info_element->len,
1798 MAX_RATES_LENGTH);
1799 for (i = 0; i < network->rates_len; i++) {
1800 network->rates[i] = info_element->data[i];
1801 p += snprintf(p, sizeof(rates_str) -
1802 (p - rates_str), "%02X ",
1803 network->rates[i]);
1804 if (rtllib_is_ofdm_rate
1805 (info_element->data[i])) {
1806 network->flags |= NETWORK_HAS_OFDM;
1807 if (info_element->data[i] &
1808 RTLLIB_BASIC_RATE_MASK)
1809 network->flags &=
1810 ~NETWORK_HAS_CCK;
1811 }
1812
1813 if (rtllib_is_cck_rate
1814 (info_element->data[i])) {
1815 network->flags |= NETWORK_HAS_CCK;
1816 }
1817 }
1818
1819 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1820 rates_str, network->rates_len);
1821 break;
1822
1823 case MFIE_TYPE_RATES_EX:
1824 p = rates_str;
1825 network->rates_ex_len = min(info_element->len,
1826 MAX_RATES_EX_LENGTH);
1827 for (i = 0; i < network->rates_ex_len; i++) {
1828 network->rates_ex[i] = info_element->data[i];
1829 p += snprintf(p, sizeof(rates_str) -
1830 (p - rates_str), "%02X ",
1831 network->rates[i]);
1832 if (rtllib_is_ofdm_rate
1833 (info_element->data[i])) {
1834 network->flags |= NETWORK_HAS_OFDM;
1835 if (info_element->data[i] &
1836 RTLLIB_BASIC_RATE_MASK)
1837 network->flags &=
1838 ~NETWORK_HAS_CCK;
1839 }
1840 }
1841
1842 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1843 rates_str, network->rates_ex_len);
1844 break;
1845
1846 case MFIE_TYPE_DS_SET:
1847 RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1848 info_element->data[0]);
1849 network->channel = info_element->data[0];
1850 break;
1851
1852 case MFIE_TYPE_FH_SET:
1853 RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1854 break;
1855
1856 case MFIE_TYPE_CF_SET:
1857 RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1858 break;
1859
1860 case MFIE_TYPE_TIM:
1861 if (info_element->len < 4)
1862 break;
1863
1864 network->tim.tim_count = info_element->data[0];
1865 network->tim.tim_period = info_element->data[1];
1866
1867 network->dtim_period = info_element->data[1];
1868 if (ieee->state != RTLLIB_LINKED)
1869 break;
1870 network->last_dtim_sta_time = jiffies;
1871
1872 network->dtim_data = RTLLIB_DTIM_VALID;
1873
1874
1875 if (info_element->data[2] & 1)
1876 network->dtim_data |= RTLLIB_DTIM_MBCAST;
1877
1878 offset = (info_element->data[2] >> 1)*2;
1879
1880
1881 if (ieee->assoc_id < 8*offset ||
1882 ieee->assoc_id > 8*(offset + info_element->len -3))
1883
1884 break;
1885
1886 offset = (ieee->assoc_id / 8) - offset;
1887 if (info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1888 network->dtim_data |= RTLLIB_DTIM_UCAST;
1889
1890 network->listen_interval = network->dtim_period;
1891 break;
1892
1893 case MFIE_TYPE_ERP:
1894 network->erp_value = info_element->data[0];
1895 network->flags |= NETWORK_HAS_ERP_VALUE;
1896 RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1897 network->erp_value);
1898 break;
1899 case MFIE_TYPE_IBSS_SET:
1900 network->atim_window = info_element->data[0];
1901 RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1902 network->atim_window);
1903 break;
1904
1905 case MFIE_TYPE_CHALLENGE:
1906 RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1907 break;
1908
1909 case MFIE_TYPE_GENERIC:
1910 RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1911 info_element->len);
1912 if (!rtllib_parse_qos_info_param_IE(info_element,
1913 network))
1914 break;
1915 if (info_element->len >= 4 &&
1916 info_element->data[0] == 0x00 &&
1917 info_element->data[1] == 0x50 &&
1918 info_element->data[2] == 0xf2 &&
1919 info_element->data[3] == 0x01) {
1920 network->wpa_ie_len = min(info_element->len + 2,
1921 MAX_WPA_IE_LEN);
1922 memcpy(network->wpa_ie, info_element,
1923 network->wpa_ie_len);
1924 break;
1925 }
1926 if (info_element->len == 7 &&
1927 info_element->data[0] == 0x00 &&
1928 info_element->data[1] == 0xe0 &&
1929 info_element->data[2] == 0x4c &&
1930 info_element->data[3] == 0x01 &&
1931 info_element->data[4] == 0x02)
1932 network->Turbo_Enable = 1;
1933
1934 if (tmp_htcap_len == 0) {
1935 if (info_element->len >= 4 &&
1936 info_element->data[0] == 0x00 &&
1937 info_element->data[1] == 0x90 &&
1938 info_element->data[2] == 0x4c &&
1939 info_element->data[3] == 0x033) {
1940
1941 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1942 if (tmp_htcap_len != 0){
1943 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1944 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1945 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1946 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1947 }
1948 }
1949 if (tmp_htcap_len != 0){
1950 network->bssht.bdSupportHT = true;
1951 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1952 }else{
1953 network->bssht.bdSupportHT = false;
1954 network->bssht.bdHT1R = false;
1955 }
1956 }
1957
1958
1959 if (tmp_htinfo_len == 0){
1960 if (info_element->len >= 4 &&
1961 info_element->data[0] == 0x00 &&
1962 info_element->data[1] == 0x90 &&
1963 info_element->data[2] == 0x4c &&
1964 info_element->data[3] == 0x034){
1965
1966 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1967 if (tmp_htinfo_len != 0){
1968 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1969 if (tmp_htinfo_len){
1970 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1971 sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1972 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1973 }
1974
1975 }
1976
1977 }
1978 }
1979
1980 if (ieee->aggregation){
1981 if (network->bssht.bdSupportHT){
1982 if (info_element->len >= 4 &&
1983 info_element->data[0] == 0x00 &&
1984 info_element->data[1] == 0xe0 &&
1985 info_element->data[2] == 0x4c &&
1986 info_element->data[3] == 0x02){
1987
1988 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
1989 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
1990
1991 }
1992 if (ht_realtek_agg_len >= 5){
1993 network->realtek_cap_exit = true;
1994 network->bssht.bdRT2RTAggregation = true;
1995
1996 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1997 network->bssht.bdRT2RTLongSlotTime = true;
1998
1999 if ((ht_realtek_agg_buf[4]==1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
2000 {
2001 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
2002 }
2003 }
2004 }
2005 if (ht_realtek_agg_len >= 5){
2006 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
2007 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
2008 }
2009 }
2010
2011 {
2012 if ((info_element->len >= 3 &&
2013 info_element->data[0] == 0x00 &&
2014 info_element->data[1] == 0x05 &&
2015 info_element->data[2] == 0xb5) ||
2016 (info_element->len >= 3 &&
2017 info_element->data[0] == 0x00 &&
2018 info_element->data[1] == 0x0a &&
2019 info_element->data[2] == 0xf7) ||
2020 (info_element->len >= 3 &&
2021 info_element->data[0] == 0x00 &&
2022 info_element->data[1] == 0x10 &&
2023 info_element->data[2] == 0x18)){
2024
2025 network->broadcom_cap_exist = true;
2026
2027 }
2028 }
2029 if (info_element->len >= 3 &&
2030 info_element->data[0] == 0x00 &&
2031 info_element->data[1] == 0x0c &&
2032 info_element->data[2] == 0x43)
2033 {
2034 network->ralink_cap_exist = true;
2035 }
2036 if ((info_element->len >= 3 &&
2037 info_element->data[0] == 0x00 &&
2038 info_element->data[1] == 0x03 &&
2039 info_element->data[2] == 0x7f) ||
2040 (info_element->len >= 3 &&
2041 info_element->data[0] == 0x00 &&
2042 info_element->data[1] == 0x13 &&
2043 info_element->data[2] == 0x74))
2044 {
2045 network->atheros_cap_exist = true;
2046 }
2047
2048 if ((info_element->len >= 3 &&
2049 info_element->data[0] == 0x00 &&
2050 info_element->data[1] == 0x50 &&
2051 info_element->data[2] == 0x43) )
2052 {
2053 network->marvell_cap_exist = true;
2054 }
2055 if (info_element->len >= 3 &&
2056 info_element->data[0] == 0x00 &&
2057 info_element->data[1] == 0x40 &&
2058 info_element->data[2] == 0x96)
2059 {
2060 network->cisco_cap_exist = true;
2061 }
2062
2063
2064 if (info_element->len >= 3 &&
2065 info_element->data[0] == 0x00 &&
2066 info_element->data[1] == 0x0a &&
2067 info_element->data[2] == 0xf5)
2068 {
2069 network->airgo_cap_exist = true;
2070 }
2071
2072 if (info_element->len > 4 &&
2073 info_element->data[0] == 0x00 &&
2074 info_element->data[1] == 0x40 &&
2075 info_element->data[2] == 0x96 &&
2076 info_element->data[3] == 0x01)
2077 {
2078 if (info_element->len == 6)
2079 {
2080 memcpy(network->CcxRmState, &info_element[4], 2);
2081 if (network->CcxRmState[0] != 0)
2082 {
2083 network->bCcxRmEnable = true;
2084 }
2085 else
2086 network->bCcxRmEnable = false;
2087 network->MBssidMask = network->CcxRmState[1] & 0x07;
2088 if (network->MBssidMask != 0)
2089 {
2090 network->bMBssidValid = true;
2091 network->MBssidMask = 0xff << (network->MBssidMask);
2092 memcpy(network->MBssid, network->bssid, ETH_ALEN);
2093 network->MBssid[5] &= network->MBssidMask;
2094 }
2095 else
2096 {
2097 network->bMBssidValid = false;
2098 }
2099 }
2100 else
2101 {
2102 network->bCcxRmEnable = false;
2103 }
2104 }
2105 if (info_element->len > 4 &&
2106 info_element->data[0] == 0x00 &&
2107 info_element->data[1] == 0x40 &&
2108 info_element->data[2] == 0x96 &&
2109 info_element->data[3] == 0x03)
2110 {
2111 if (info_element->len == 5)
2112 {
2113 network->bWithCcxVerNum = true;
2114 network->BssCcxVerNumber = info_element->data[4];
2115 }
2116 else
2117 {
2118 network->bWithCcxVerNum = false;
2119 network->BssCcxVerNumber = 0;
2120 }
2121 }
2122 if (info_element->len > 4 &&
2123 info_element->data[0] == 0x00 &&
2124 info_element->data[1] == 0x50 &&
2125 info_element->data[2] == 0xf2 &&
2126 info_element->data[3] == 0x04)
2127 {
2128 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2129 info_element->len);
2130 network->wzc_ie_len = min(info_element->len+2,
2131 MAX_WZC_IE_LEN);
2132 memcpy(network->wzc_ie, info_element,
2133 network->wzc_ie_len);
2134 }
2135 break;
2136
2137 case MFIE_TYPE_RSN:
2138 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2139 info_element->len);
2140 network->rsn_ie_len = min(info_element->len + 2,
2141 MAX_WPA_IE_LEN);
2142 memcpy(network->rsn_ie, info_element,
2143 network->rsn_ie_len);
2144 break;
2145
2146 case MFIE_TYPE_HT_CAP:
2147 RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2148 info_element->len);
2149 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
2150 if (tmp_htcap_len != 0){
2151 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2152 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
2153 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
2154 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
2155
2156 network->bssht.bdSupportHT = true;
2157 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
2158
2159 network->bssht.bdBandWidth = (enum ht_channel_width)(((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->ChlWidth);
2160 }
2161 else{
2162 network->bssht.bdSupportHT = false;
2163 network->bssht.bdHT1R = false;
2164 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20 ;
2165 }
2166 break;
2167
2168
2169 case MFIE_TYPE_HT_INFO:
2170 RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2171 info_element->len);
2172 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2173 if (tmp_htinfo_len){
2174 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2175 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2176 sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2177 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2178 }
2179 break;
2180
2181 case MFIE_TYPE_AIRONET:
2182 RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2183 info_element->len);
2184 if (info_element->len >IE_CISCO_FLAG_POSITION)
2185 {
2186 network->bWithAironetIE = true;
2187
2188 if ( (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC) ||
2189 (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK) )
2190 {
2191 network->bCkipSupported = true;
2192 }
2193 else
2194 {
2195 network->bCkipSupported = false;
2196 }
2197 }
2198 else
2199 {
2200 network->bWithAironetIE = false;
2201 network->bCkipSupported = false;
2202 }
2203 break;
2204 case MFIE_TYPE_QOS_PARAMETER:
2205 printk(KERN_ERR
2206 "QoS Error need to parse QOS_PARAMETER IE\n");
2207 break;
2208
2209 case MFIE_TYPE_COUNTRY:
2210 RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2211 info_element->len);
2212 rtllib_extract_country_ie(ieee, info_element, network, network->bssid);
2213 break;
2214 /* TODO */
2215 default:
2216 RTLLIB_DEBUG_MGMT
2217 ("Unsupported info element: %s (%d)\n",
2218 get_info_element_string(info_element->id),
2219 info_element->id);
2220 break;
2221 }
2222
2223 length -= sizeof(*info_element) + info_element->len;
2224 info_element =
2225 (struct rtllib_info_element *)&info_element->
2226 data[info_element->len];
2227 }
2228
2229 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2230 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2231 {
2232 network->unknown_cap_exist = true;
2233 }
2234 else
2235 {
2236 network->unknown_cap_exist = false;
2237 }
2238 return 0;
2239 }
2240
2241 static inline u8 rtllib_SignalStrengthTranslate(
2242 u8 CurrSS
2243 )
2244 {
2245 u8 RetSS;
2246
2247 if (CurrSS >= 71 && CurrSS <= 100)
2248 {
2249 RetSS = 90 + ((CurrSS - 70) / 3);
2250 }
2251 else if (CurrSS >= 41 && CurrSS <= 70)
2252 {
2253 RetSS = 78 + ((CurrSS - 40) / 3);
2254 }
2255 else if (CurrSS >= 31 && CurrSS <= 40)
2256 {
2257 RetSS = 66 + (CurrSS - 30);
2258 }
2259 else if (CurrSS >= 21 && CurrSS <= 30)
2260 {
2261 RetSS = 54 + (CurrSS - 20);
2262 }
2263 else if (CurrSS >= 5 && CurrSS <= 20)
2264 {
2265 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2266 }
2267 else if (CurrSS == 4)
2268 {
2269 RetSS = 36;
2270 }
2271 else if (CurrSS == 3)
2272 {
2273 RetSS = 27;
2274 }
2275 else if (CurrSS == 2)
2276 {
2277 RetSS = 18;
2278 }
2279 else if (CurrSS == 1)
2280 {
2281 RetSS = 9;
2282 }
2283 else
2284 {
2285 RetSS = CurrSS;
2286 }
2287
2288
2289
2290 return RetSS;
2291 }
2292
2293 long rtllib_translate_todbm(u8 signal_strength_index )
2294 {
2295 long signal_power;
2296
2297 signal_power = (long)((signal_strength_index + 1) >> 1);
2298 signal_power -= 95;
2299
2300 return signal_power;
2301 }
2302
2303 static inline int rtllib_network_init(
2304 struct rtllib_device *ieee,
2305 struct rtllib_probe_response *beacon,
2306 struct rtllib_network *network,
2307 struct rtllib_rx_stats *stats)
2308 {
2309
2310 /*
2311 network->qos_data.active = 0;
2312 network->qos_data.supported = 0;
2313 network->qos_data.param_count = 0;
2314 network->qos_data.old_param_count = 0;
2315 */
2316 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2317
2318 /* Pull out fixed field data */
2319 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2320 network->capability = le16_to_cpu(beacon->capability);
2321 network->last_scanned = jiffies;
2322 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2323 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2324 network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
2325 /* Where to pull this? beacon->listen_interval;*/
2326 network->listen_interval = 0x0A;
2327 network->rates_len = network->rates_ex_len = 0;
2328 network->last_associate = 0;
2329 network->ssid_len = 0;
2330 network->hidden_ssid_len = 0;
2331 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2332 network->flags = 0;
2333 network->atim_window = 0;
2334 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2335 0x3 : 0x0;
2336 network->berp_info_valid = false;
2337 network->broadcom_cap_exist = false;
2338 network->ralink_cap_exist = false;
2339 network->atheros_cap_exist = false;
2340 network->cisco_cap_exist = false;
2341 network->unknown_cap_exist = false;
2342 network->realtek_cap_exit = false;
2343 network->marvell_cap_exist = false;
2344 network->airgo_cap_exist = false;
2345 network->Turbo_Enable = 0;
2346 network->SignalStrength = stats->SignalStrength;
2347 network->RSSI = stats->SignalStrength;
2348 network->CountryIeLen = 0;
2349 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2350 HTInitializeBssDesc(&network->bssht);
2351 if (stats->freq == RTLLIB_52GHZ_BAND) {
2352 /* for A band (No DS info) */
2353 network->channel = stats->received_channel;
2354 } else
2355 network->flags |= NETWORK_HAS_CCK;
2356
2357 network->wpa_ie_len = 0;
2358 network->rsn_ie_len = 0;
2359 network->wzc_ie_len = 0;
2360
2361 if (rtllib_parse_info_param(ieee,
2362 beacon->info_element,
2363 (stats->len - sizeof(*beacon)),
2364 network,
2365 stats))
2366 return 1;
2367
2368 network->mode = 0;
2369 if (stats->freq == RTLLIB_52GHZ_BAND)
2370 network->mode = IEEE_A;
2371 else {
2372 if (network->flags & NETWORK_HAS_OFDM)
2373 network->mode |= IEEE_G;
2374 if (network->flags & NETWORK_HAS_CCK)
2375 network->mode |= IEEE_B;
2376 }
2377
2378 if (network->mode == 0) {
2379 RTLLIB_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
2380 "network.\n",
2381 escape_essid(network->ssid,
2382 network->ssid_len),
2383 MAC_ARG(network->bssid));
2384 return 1;
2385 }
2386
2387 if (network->bssht.bdSupportHT){
2388 if (network->mode == IEEE_A)
2389 network->mode = IEEE_N_5G;
2390 else if (network->mode & (IEEE_G | IEEE_B))
2391 network->mode = IEEE_N_24G;
2392 }
2393 if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2394 network->flags |= NETWORK_EMPTY_ESSID;
2395 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2396 stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) -25;
2397
2398 memcpy(&network->stats, stats, sizeof(network->stats));
2399
2400 return 0;
2401 }
2402
2403 static inline int is_same_network(struct rtllib_network *src,
2404 struct rtllib_network *dst, u8 ssidbroad)
2405 {
2406 /* A network is only a duplicate if the channel, BSSID, ESSID
2407 * and the capability field (in particular IBSS and BSS) all match.
2408 * We treat all <hidden> with the same BSSID and channel
2409 * as one network */
2410 return
2411 (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2412 (src->channel == dst->channel) &&
2413 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2414 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (!ssidbroad)) &&
2415 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2416 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2417 ((src->capability & WLAN_CAPABILITY_ESS) ==
2418 (dst->capability & WLAN_CAPABILITY_ESS)));
2419 }
2420
2421 static inline void update_ibss_network(struct rtllib_network *dst,
2422 struct rtllib_network *src)
2423 {
2424 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2425 dst->last_scanned = jiffies;
2426 }
2427
2428
2429 static inline void update_network(struct rtllib_network *dst,
2430 struct rtllib_network *src)
2431 {
2432 int qos_active;
2433 u8 old_param;
2434
2435 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2436 dst->capability = src->capability;
2437 memcpy(dst->rates, src->rates, src->rates_len);
2438 dst->rates_len = src->rates_len;
2439 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2440 dst->rates_ex_len = src->rates_ex_len;
2441 if (src->ssid_len > 0)
2442 {
2443 if (dst->ssid_len == 0)
2444 {
2445 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2446 dst->hidden_ssid_len = src->ssid_len;
2447 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2448 }else{
2449 memset(dst->ssid, 0, dst->ssid_len);
2450 dst->ssid_len = src->ssid_len;
2451 memcpy(dst->ssid, src->ssid, src->ssid_len);
2452 }
2453 }
2454 dst->mode = src->mode;
2455 dst->flags = src->flags;
2456 dst->time_stamp[0] = src->time_stamp[0];
2457 dst->time_stamp[1] = src->time_stamp[1];
2458 if (src->flags & NETWORK_HAS_ERP_VALUE)
2459 {
2460 dst->erp_value = src->erp_value;
2461 dst->berp_info_valid = src->berp_info_valid = true;
2462 }
2463 dst->beacon_interval = src->beacon_interval;
2464 dst->listen_interval = src->listen_interval;
2465 dst->atim_window = src->atim_window;
2466 dst->dtim_period = src->dtim_period;
2467 dst->dtim_data = src->dtim_data;
2468 dst->last_dtim_sta_time = src->last_dtim_sta_time;
2469 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2470
2471 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2472 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2473 dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2474 memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2475 dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2476 memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2477 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2478 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2479 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2480 dst->ralink_cap_exist = src->ralink_cap_exist;
2481 dst->atheros_cap_exist = src->atheros_cap_exist;
2482 dst->realtek_cap_exit = src->realtek_cap_exit;
2483 dst->marvell_cap_exist = src->marvell_cap_exist;
2484 dst->cisco_cap_exist = src->cisco_cap_exist;
2485 dst->airgo_cap_exist = src->airgo_cap_exist;
2486 dst->unknown_cap_exist = src->unknown_cap_exist;
2487 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2488 dst->wpa_ie_len = src->wpa_ie_len;
2489 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2490 dst->rsn_ie_len = src->rsn_ie_len;
2491 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2492 dst->wzc_ie_len = src->wzc_ie_len;
2493
2494 dst->last_scanned = jiffies;
2495 /* qos related parameters */
2496 qos_active = dst->qos_data.active;
2497 old_param = dst->qos_data.param_count;
2498 dst->qos_data.supported = src->qos_data.supported;
2499 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2500 memcpy(&dst->qos_data, &src->qos_data, sizeof(struct rtllib_qos_data));
2501 if (dst->qos_data.supported == 1) {
2502 if (dst->ssid_len)
2503 RTLLIB_DEBUG_QOS
2504 ("QoS the network %s is QoS supported\n",
2505 dst->ssid);
2506 else
2507 RTLLIB_DEBUG_QOS
2508 ("QoS the network is QoS supported\n");
2509 }
2510 dst->qos_data.active = qos_active;
2511 dst->qos_data.old_param_count = old_param;
2512
2513 /* dst->last_associate is not overwritten */
2514 dst->wmm_info = src->wmm_info;
2515 if (src->wmm_param[0].ac_aci_acm_aifsn|| \
2516 src->wmm_param[1].ac_aci_acm_aifsn|| \
2517 src->wmm_param[2].ac_aci_acm_aifsn|| \
2518 src->wmm_param[1].ac_aci_acm_aifsn) {
2519 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2520 }
2521
2522 dst->SignalStrength = src->SignalStrength;
2523 dst->RSSI = src->RSSI;
2524 dst->Turbo_Enable = src->Turbo_Enable;
2525
2526 dst->CountryIeLen = src->CountryIeLen;
2527 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2528
2529 dst->bWithAironetIE = src->bWithAironetIE;
2530 dst->bCkipSupported = src->bCkipSupported;
2531 memcpy(dst->CcxRmState,src->CcxRmState,2);
2532 dst->bCcxRmEnable = src->bCcxRmEnable;
2533 dst->MBssidMask = src->MBssidMask;
2534 dst->bMBssidValid = src->bMBssidValid;
2535 memcpy(dst->MBssid,src->MBssid,6);
2536 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2537 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2538
2539 }
2540 static inline int is_beacon(__le16 fc)
2541 {
2542 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2543 }
2544
2545 static int IsPassiveChannel( struct rtllib_device *rtllib, u8 channel)
2546 {
2547 if (MAX_CHANNEL_NUMBER < channel) {
2548 printk("%s(): Invalid Channel\n", __func__);
2549 return 0;
2550 }
2551
2552 if (rtllib->active_channel_map[channel] == 2)
2553 return 1;
2554
2555 return 0;
2556 }
2557
2558 int IsLegalChannel( struct rtllib_device *rtllib, u8 channel)
2559 {
2560 if (MAX_CHANNEL_NUMBER < channel) {
2561 printk("%s(): Invalid Channel\n", __func__);
2562 return 0;
2563 }
2564 if (rtllib->active_channel_map[channel] > 0)
2565 return 1;
2566
2567 return 0;
2568 }
2569
2570
2571 static inline void rtllib_process_probe_response(
2572 struct rtllib_device *ieee,
2573 struct rtllib_probe_response *beacon,
2574 struct rtllib_rx_stats *stats)
2575 {
2576 struct rtllib_network *target;
2577 struct rtllib_network *oldest = NULL;
2578 struct rtllib_info_element *info_element = &beacon->info_element[0];
2579 unsigned long flags;
2580 short renew;
2581 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network), GFP_ATOMIC);
2582
2583 if (!network)
2584 return;
2585
2586 RTLLIB_DEBUG_SCAN(
2587 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2588 escape_essid(info_element->data, info_element->len),
2589 MAC_ARG(beacon->header.addr3),
2590 (beacon->capability & (1<<0xf)) ? '1' : '0',
2591 (beacon->capability & (1<<0xe)) ? '1' : '0',
2592 (beacon->capability & (1<<0xd)) ? '1' : '0',
2593 (beacon->capability & (1<<0xc)) ? '1' : '0',
2594 (beacon->capability & (1<<0xb)) ? '1' : '0',
2595 (beacon->capability & (1<<0xa)) ? '1' : '0',
2596 (beacon->capability & (1<<0x9)) ? '1' : '0',
2597 (beacon->capability & (1<<0x8)) ? '1' : '0',
2598 (beacon->capability & (1<<0x7)) ? '1' : '0',
2599 (beacon->capability & (1<<0x6)) ? '1' : '0',
2600 (beacon->capability & (1<<0x5)) ? '1' : '0',
2601 (beacon->capability & (1<<0x4)) ? '1' : '0',
2602 (beacon->capability & (1<<0x3)) ? '1' : '0',
2603 (beacon->capability & (1<<0x2)) ? '1' : '0',
2604 (beacon->capability & (1<<0x1)) ? '1' : '0',
2605 (beacon->capability & (1<<0x0)) ? '1' : '0');
2606
2607 if (rtllib_network_init(ieee, beacon, network, stats)) {
2608 RTLLIB_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
2609 escape_essid(info_element->data,
2610 info_element->len),
2611 MAC_ARG(beacon->header.addr3),
2612 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2613 RTLLIB_STYPE_PROBE_RESP ?
2614 "PROBE RESPONSE" : "BEACON");
2615 goto free_network;
2616 }
2617
2618
2619 if (!IsLegalChannel(ieee, network->channel))
2620 goto free_network;
2621
2622 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == RTLLIB_STYPE_PROBE_RESP) {
2623 if (IsPassiveChannel(ieee, network->channel)) {
2624 printk("GetScanInfo(): For Global Domain, "
2625 "filter probe response at channel(%d).\n", network->channel);
2626 goto free_network;
2627 }
2628 }
2629
2630 /* The network parsed correctly -- so now we scan our known networks
2631 * to see if we can find it in our list.
2632 *
2633 * NOTE: This search is definitely not optimized. Once its doing
2634 * the "right thing" we'll optimize it for efficiency if
2635 * necessary */
2636
2637 /* Search for this entry in the list and update it if it is
2638 * already there. */
2639
2640 spin_lock_irqsave(&ieee->lock, flags);
2641 {
2642 if (is_same_network(&ieee->current_network, network, (network->ssid_len?1:0))) {
2643 update_network(&ieee->current_network, network);
2644 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2645 && ieee->current_network.berp_info_valid){
2646 if (ieee->current_network.erp_value& ERP_UseProtection)
2647 ieee->current_network.buseprotection = true;
2648 else
2649 ieee->current_network.buseprotection = false;
2650 }
2651 if (is_beacon(beacon->header.frame_ctl))
2652 {
2653 if (ieee->state >= RTLLIB_LINKED)
2654 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2655 }
2656 }
2657 }
2658 list_for_each_entry(target, &ieee->network_list, list) {
2659 if (is_same_network(target, network,(target->ssid_len?1:0)))
2660 break;
2661 if ((oldest == NULL) ||
2662 (target->last_scanned < oldest->last_scanned))
2663 oldest = target;
2664 }
2665
2666 /* If we didn't find a match, then get a new network slot to initialize
2667 * with this beacon's information */
2668 if (&target->list == &ieee->network_list) {
2669 if (list_empty(&ieee->network_free_list)) {
2670 /* If there are no more slots, expire the oldest */
2671 list_del(&oldest->list);
2672 target = oldest;
2673 RTLLIB_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
2674 "network list.\n",
2675 escape_essid(target->ssid,
2676 target->ssid_len),
2677 MAC_ARG(target->bssid));
2678 } else {
2679 /* Otherwise just pull from the free list */
2680 target = list_entry(ieee->network_free_list.next,
2681 struct rtllib_network, list);
2682 list_del(ieee->network_free_list.next);
2683 }
2684
2685
2686 RTLLIB_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
2687 escape_essid(network->ssid,
2688 network->ssid_len),
2689 MAC_ARG(network->bssid),
2690 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2691 RTLLIB_STYPE_PROBE_RESP ?
2692 "PROBE RESPONSE" : "BEACON");
2693 memcpy(target, network, sizeof(*target));
2694 list_add_tail(&target->list, &ieee->network_list);
2695 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2696 rtllib_softmac_new_net(ieee, network);
2697 } else {
2698 RTLLIB_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
2699 escape_essid(target->ssid,
2700 target->ssid_len),
2701 MAC_ARG(target->bssid),
2702 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2703 RTLLIB_STYPE_PROBE_RESP ?
2704 "PROBE RESPONSE" : "BEACON");
2705
2706 /* we have an entry and we are going to update it. But this entry may
2707 * be already expired. In this case we do the same as we found a new
2708 * net and call the new_net handler
2709 */
2710 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2711 if ((!target->ssid_len) &&
2712 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2713 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2714 (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) &&
2715 (ieee->state == RTLLIB_NOLINK)))
2716 ) {
2717 renew = 1;
2718 }
2719 update_network(target, network);
2720 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2721 rtllib_softmac_new_net(ieee, network);
2722 }
2723
2724 spin_unlock_irqrestore(&ieee->lock, flags);
2725 if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, network, (network->ssid_len?1:0))&&\
2726 (ieee->state == RTLLIB_LINKED)) {
2727 if (ieee->handle_beacon != NULL) {
2728 ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
2729 }
2730 }
2731 free_network:
2732 kfree(network);
2733 return;
2734 }
2735
2736 void rtllib_rx_mgt(struct rtllib_device *ieee,
2737 struct sk_buff *skb,
2738 struct rtllib_rx_stats *stats)
2739 {
2740 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ;
2741 if (WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_PROBE_RESP &&
2742 WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_BEACON)
2743 ieee->last_rx_ps_time = jiffies;
2744
2745 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2746
2747 case RTLLIB_STYPE_BEACON:
2748 RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
2749 WLAN_FC_GET_STYPE(header->frame_ctl));
2750 RTLLIB_DEBUG_SCAN("Beacon\n");
2751 rtllib_process_probe_response(
2752 ieee, (struct rtllib_probe_response *)header, stats);
2753
2754 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2755 ieee->iw_mode == IW_MODE_INFRA &&
2756 ieee->state == RTLLIB_LINKED))
2757 tasklet_schedule(&ieee->ps_task);
2758
2759 break;
2760
2761 case RTLLIB_STYPE_PROBE_RESP:
2762 RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2763 WLAN_FC_GET_STYPE(header->frame_ctl));
2764 RTLLIB_DEBUG_SCAN("Probe response\n");
2765 rtllib_process_probe_response(
2766 ieee, (struct rtllib_probe_response *)header, stats);
2767 break;
2768 case RTLLIB_STYPE_PROBE_REQ:
2769 RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
2770 WLAN_FC_GET_STYPE(header->frame_ctl));
2771 RTLLIB_DEBUG_SCAN("Probe request\n");
2772 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2773 ((ieee->iw_mode == IW_MODE_ADHOC ||
2774 ieee->iw_mode == IW_MODE_MASTER) &&
2775 ieee->state == RTLLIB_LINKED)){
2776 rtllib_rx_probe_rq(ieee, skb);
2777 }
2778 break;
2779 }
2780
2781 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree