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16#include <linux/compiler.h>
17#include <linux/errno.h>
18#include <linux/if_arp.h>
19#include <linux/in6.h>
20#include <linux/in.h>
21#include <linux/ip.h>
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/netdevice.h>
25#include <linux/pci.h>
26#include <linux/proc_fs.h>
27#include <linux/skbuff.h>
28#include <linux/slab.h>
29#include <linux/tcp.h>
30#include <linux/types.h>
31#include <linux/wireless.h>
32#include <linux/etherdevice.h>
33#include <linux/uaccess.h>
34#include <linux/ctype.h>
35
36#include "rtllib.h"
37#include "dot11d.h"
38
39static void rtllib_rx_mgt(struct rtllib_device *ieee, struct sk_buff *skb,
40 struct rtllib_rx_stats *stats);
41
42static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
43 struct sk_buff *skb,
44 struct rtllib_rx_stats *rx_status,
45 size_t hdr_length)
46{
47 skb->dev = ieee->dev;
48 skb_reset_mac_header(skb);
49 skb_pull(skb, hdr_length);
50 skb->pkt_type = PACKET_OTHERHOST;
51 skb->protocol = htons(ETH_P_80211_RAW);
52 memset(skb->cb, 0, sizeof(skb->cb));
53 netif_rx(skb);
54}
55
56
57static struct rtllib_frag_entry *
58rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
59 unsigned int frag, u8 tid, u8 *src, u8 *dst)
60{
61 struct rtllib_frag_entry *entry;
62 int i;
63
64 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
65 entry = &ieee->frag_cache[tid][i];
66 if (entry->skb != NULL &&
67 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
68 netdev_dbg(ieee->dev,
69 "expiring fragment cache entry seq=%u last_frag=%u\n",
70 entry->seq, entry->last_frag);
71 dev_kfree_skb_any(entry->skb);
72 entry->skb = NULL;
73 }
74
75 if (entry->skb != NULL && entry->seq == seq &&
76 (entry->last_frag + 1 == frag || frag == -1) &&
77 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
78 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
79 return entry;
80 }
81
82 return NULL;
83}
84
85
86static struct sk_buff *
87rtllib_frag_cache_get(struct rtllib_device *ieee,
88 struct rtllib_hdr_4addr *hdr)
89{
90 struct sk_buff *skb = NULL;
91 u16 fc = le16_to_cpu(hdr->frame_ctl);
92 u16 sc = le16_to_cpu(hdr->seq_ctl);
93 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
94 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
95 struct rtllib_frag_entry *entry;
96 struct rtllib_hdr_3addrqos *hdr_3addrqos;
97 struct rtllib_hdr_4addrqos *hdr_4addrqos;
98 u8 tid;
99
100 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
101 RTLLIB_QOS_HAS_SEQ(fc)) {
102 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
103 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
104 tid = UP2AC(tid);
105 tid++;
106 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
107 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
108 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
109 tid = UP2AC(tid);
110 tid++;
111 } else {
112 tid = 0;
113 }
114
115 if (frag == 0) {
116
117 skb = dev_alloc_skb(ieee->dev->mtu +
118 sizeof(struct rtllib_hdr_4addr) +
119 8 +
120 2 +
121 8 +
122 ETH_ALEN +
123
124 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0));
125 if (!skb)
126 return NULL;
127
128 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
129 ieee->frag_next_idx[tid]++;
130 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
131 ieee->frag_next_idx[tid] = 0;
132
133 if (entry->skb != NULL)
134 dev_kfree_skb_any(entry->skb);
135
136 entry->first_frag_time = jiffies;
137 entry->seq = seq;
138 entry->last_frag = frag;
139 entry->skb = skb;
140 ether_addr_copy(entry->src_addr, hdr->addr2);
141 ether_addr_copy(entry->dst_addr, hdr->addr1);
142 } else {
143
144
145
146 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
147 hdr->addr1);
148 if (entry != NULL) {
149 entry->last_frag = frag;
150 skb = entry->skb;
151 }
152 }
153
154 return skb;
155}
156
157
158
159static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
160 struct rtllib_hdr_4addr *hdr)
161{
162 u16 fc = le16_to_cpu(hdr->frame_ctl);
163 u16 sc = le16_to_cpu(hdr->seq_ctl);
164 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
165 struct rtllib_frag_entry *entry;
166 struct rtllib_hdr_3addrqos *hdr_3addrqos;
167 struct rtllib_hdr_4addrqos *hdr_4addrqos;
168 u8 tid;
169
170 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
171 RTLLIB_QOS_HAS_SEQ(fc)) {
172 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
173 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
174 tid = UP2AC(tid);
175 tid++;
176 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
177 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
178 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
179 tid = UP2AC(tid);
180 tid++;
181 } else {
182 tid = 0;
183 }
184
185 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
186 hdr->addr1);
187
188 if (entry == NULL) {
189 netdev_dbg(ieee->dev,
190 "Couldn't invalidate fragment cache entry (seq=%u)\n",
191 seq);
192 return -1;
193 }
194
195 entry->skb = NULL;
196 return 0;
197}
198
199
200
201
202
203
204
205static inline int
206rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
207 struct rtllib_rx_stats *rx_stats, u16 type,
208 u16 stype)
209{
210
211
212
213
214 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
215
216 rx_stats->len = skb->len;
217 rtllib_rx_mgt(ieee, skb, rx_stats);
218 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
219 dev_kfree_skb_any(skb);
220 return 0;
221 }
222 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
223
224 dev_kfree_skb_any(skb);
225
226 return 0;
227}
228
229
230
231
232static unsigned char rfc1042_header[] = {
233 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
234};
235
236static unsigned char bridge_tunnel_header[] = {
237 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
238};
239
240
241
242static 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
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
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
266 } else
267 return 0;
268
269 if (skb->len < 24 + 8)
270 return 0;
271
272
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
282static inline int
283rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
284 struct lib80211_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 struct cb_desc *tcb_desc = (struct cb_desc *)
294 (skb->cb + MAX_DEV_ADDR_SIZE);
295
296 tcb_desc->bHwSec = 1;
297
298 if (ieee->need_sw_enc)
299 tcb_desc->bHwSec = 0;
300 }
301
302 hdr = (struct rtllib_hdr_4addr *) skb->data;
303 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
304
305 atomic_inc(&crypt->refcnt);
306 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
307 atomic_dec(&crypt->refcnt);
308 if (res < 0) {
309 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n",
310 hdr->addr2, res);
311 if (res == -2)
312 netdev_dbg(ieee->dev,
313 "Decryption failed ICV mismatch (key %d)\n",
314 skb->data[hdrlen + 3] >> 6);
315 return -1;
316 }
317
318 return res;
319}
320
321
322
323static inline int
324rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
325 int keyidx, struct lib80211_crypt_data *crypt)
326{
327 struct rtllib_hdr_4addr *hdr;
328 int res, hdrlen;
329
330 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
331 return 0;
332 if (ieee->hwsec_active) {
333 struct cb_desc *tcb_desc = (struct cb_desc *)
334 (skb->cb + MAX_DEV_ADDR_SIZE);
335
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);
347 atomic_dec(&crypt->refcnt);
348 if (res < 0) {
349 netdev_dbg(ieee->dev,
350 "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
351 hdr->addr2, keyidx);
352 return -1;
353 }
354
355 return 0;
356}
357
358
359
360#define IEEE_PACKET_RETRY_TIME (5*HZ)
361static 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) &&
375 RTLLIB_QOS_HAS_SEQ(fc)) {
376 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
377 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
378 tid = UP2AC(tid);
379 tid++;
380 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
381 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
382 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
383 tid = UP2AC(tid);
384 tid++;
385 } else {
386 tid = 0;
387 }
388
389 switch (ieee->iw_mode) {
390 case IW_MODE_ADHOC:
391 {
392 struct list_head *p;
393 struct ieee_ibss_seq *entry = NULL;
394 u8 *mac = header->addr2;
395 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
396
397 list_for_each(p, &ieee->ibss_mac_hash[index]) {
398 entry = list_entry(p, struct ieee_ibss_seq, list);
399 if (!memcmp(entry->mac, mac, ETH_ALEN))
400 break;
401 }
402 if (p == &ieee->ibss_mac_hash[index]) {
403 entry = kmalloc(sizeof(struct ieee_ibss_seq),
404 GFP_ATOMIC);
405 if (!entry)
406 return 0;
407
408 ether_addr_copy(entry->mac, mac);
409 entry->seq_num[tid] = seq;
410 entry->frag_num[tid] = frag;
411 entry->packet_time[tid] = jiffies;
412 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
413 return 0;
414 }
415 last_seq = &entry->seq_num[tid];
416 last_frag = &entry->frag_num[tid];
417 last_time = &entry->packet_time[tid];
418 break;
419 }
420
421 case IW_MODE_INFRA:
422 last_seq = &ieee->last_rxseq_num[tid];
423 last_frag = &ieee->last_rxfrag_num[tid];
424 last_time = &ieee->last_packet_time[tid];
425 break;
426 default:
427 return 0;
428 }
429
430 if ((*last_seq == seq) &&
431 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
432 if (*last_frag == frag)
433 goto drop;
434 if (*last_frag + 1 != frag)
435
436 goto drop;
437 } else
438 *last_seq = seq;
439
440 *last_frag = frag;
441 *last_time = jiffies;
442 return 0;
443
444drop:
445
446 return 1;
447}
448
449static bool AddReorderEntry(struct rx_ts_record *pTS,
450 struct rx_reorder_entry *pReorderEntry)
451{
452 struct list_head *pList = &pTS->rx_pending_pkt_list;
453
454 while (pList->next != &pTS->rx_pending_pkt_list) {
455 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
456 list_entry(pList->next, struct rx_reorder_entry,
457 List))->SeqNum))
458 pList = pList->next;
459 else if (SN_EQUAL(pReorderEntry->SeqNum,
460 ((struct rx_reorder_entry *)list_entry(pList->next,
461 struct rx_reorder_entry, List))->SeqNum))
462 return false;
463 else
464 break;
465 }
466 pReorderEntry->List.next = pList->next;
467 pReorderEntry->List.next->prev = &pReorderEntry->List;
468 pReorderEntry->List.prev = pList;
469 pList->next = &pReorderEntry->List;
470
471 return true;
472}
473
474void rtllib_indicate_packets(struct rtllib_device *ieee,
475 struct rtllib_rxb **prxbIndicateArray, u8 index)
476{
477 struct net_device_stats *stats = &ieee->stats;
478 u8 i = 0, j = 0;
479 u16 ethertype;
480
481 for (j = 0; j < index; j++) {
482 struct rtllib_rxb *prxb = prxbIndicateArray[j];
483
484 for (i = 0; i < prxb->nr_subframes; i++) {
485 struct sk_buff *sub_skb = prxb->subframes[i];
486
487
488 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
489 if (sub_skb->len >= 8 &&
490 ((memcmp(sub_skb->data, rfc1042_header,
491 SNAP_SIZE) == 0 &&
492 ethertype != ETH_P_AARP &&
493 ethertype != ETH_P_IPX) ||
494 memcmp(sub_skb->data, bridge_tunnel_header,
495 SNAP_SIZE) == 0)) {
496
497
498
499 skb_pull(sub_skb, SNAP_SIZE);
500 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
501 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
502 } else {
503 u16 len;
504
505 len = sub_skb->len;
506 memcpy(skb_push(sub_skb, 2), &len, 2);
507 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
508 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
509 }
510
511
512 if (sub_skb) {
513 stats->rx_packets++;
514 stats->rx_bytes += sub_skb->len;
515
516 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
517 sub_skb->protocol = eth_type_trans(sub_skb,
518 ieee->dev);
519 sub_skb->dev = ieee->dev;
520 sub_skb->dev->stats.rx_packets++;
521 sub_skb->dev->stats.rx_bytes += sub_skb->len;
522
523 sub_skb->ip_summed = CHECKSUM_NONE;
524 ieee->last_rx_ps_time = jiffies;
525 netif_rx(sub_skb);
526 }
527 }
528 kfree(prxb);
529 prxb = NULL;
530 }
531}
532
533void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,
534 struct rx_ts_record *pTS)
535{
536 struct rx_reorder_entry *pRxReorderEntry;
537 u8 RfdCnt = 0;
538
539 del_timer_sync(&pTS->rx_pkt_pending_timer);
540 while (!list_empty(&pTS->rx_pending_pkt_list)) {
541 if (RfdCnt >= REORDER_WIN_SIZE) {
542 netdev_info(ieee->dev,
543 "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n",
544 __func__);
545 break;
546 }
547
548 pRxReorderEntry = (struct rx_reorder_entry *)
549 list_entry(pTS->rx_pending_pkt_list.prev,
550 struct rx_reorder_entry, List);
551 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__,
552 pRxReorderEntry->SeqNum);
553 list_del_init(&pRxReorderEntry->List);
554
555 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
556
557 RfdCnt = RfdCnt + 1;
558 list_add_tail(&pRxReorderEntry->List,
559 &ieee->RxReorder_Unused_List);
560 }
561 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
562
563 pTS->rx_indicate_seq = 0xffff;
564}
565
566static void RxReorderIndicatePacket(struct rtllib_device *ieee,
567 struct rtllib_rxb *prxb,
568 struct rx_ts_record *pTS, u16 SeqNum)
569{
570 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
571 struct rx_reorder_entry *pReorderEntry = NULL;
572 u8 WinSize = pHTInfo->RxReorderWinSize;
573 u16 WinEnd = 0;
574 u8 index = 0;
575 bool bMatchWinStart = false, bPktInBuf = false;
576 unsigned long flags;
577
578 netdev_dbg(ieee->dev,
579 "%s(): Seq is %d, pTS->rx_indicate_seq is %d, WinSize is %d\n",
580 __func__, SeqNum, pTS->rx_indicate_seq, WinSize);
581
582 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
583
584 WinEnd = (pTS->rx_indicate_seq + WinSize - 1) % 4096;
585
586 if (pTS->rx_indicate_seq == 0xffff)
587 pTS->rx_indicate_seq = SeqNum;
588
589
590 if (SN_LESS(SeqNum, pTS->rx_indicate_seq)) {
591 netdev_dbg(ieee->dev,
592 "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
593 pTS->rx_indicate_seq, SeqNum);
594 pHTInfo->RxReorderDropCounter++;
595 {
596 int i;
597
598 for (i = 0; i < prxb->nr_subframes; i++)
599 dev_kfree_skb(prxb->subframes[i]);
600 kfree(prxb);
601 prxb = NULL;
602 }
603 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
604 return;
605 }
606
607
608
609
610
611 if (SN_EQUAL(SeqNum, pTS->rx_indicate_seq)) {
612 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096;
613 bMatchWinStart = true;
614 } else if (SN_LESS(WinEnd, SeqNum)) {
615 if (SeqNum >= (WinSize - 1))
616 pTS->rx_indicate_seq = SeqNum + 1 - WinSize;
617 else
618 pTS->rx_indicate_seq = 4095 -
619 (WinSize - (SeqNum + 1)) + 1;
620 netdev_dbg(ieee->dev,
621 "Window Shift! IndicateSeq: %d, NewSeq: %d\n",
622 pTS->rx_indicate_seq, SeqNum);
623 }
624
625
626
627
628
629
630
631
632
633
634
635 if (bMatchWinStart) {
636
637 netdev_dbg(ieee->dev,
638 "Packets indication! IndicateSeq: %d, NewSeq: %d\n",
639 pTS->rx_indicate_seq, SeqNum);
640 ieee->prxbIndicateArray[0] = prxb;
641 index = 1;
642 } else {
643
644 if (!list_empty(&ieee->RxReorder_Unused_List)) {
645 pReorderEntry = (struct rx_reorder_entry *)
646 list_entry(ieee->RxReorder_Unused_List.next,
647 struct rx_reorder_entry, List);
648 list_del_init(&pReorderEntry->List);
649
650
651
652
653 pReorderEntry->SeqNum = SeqNum;
654 pReorderEntry->prxb = prxb;
655
656 if (!AddReorderEntry(pTS, pReorderEntry)) {
657 int i;
658
659 netdev_dbg(ieee->dev,
660 "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n",
661 __func__, pTS->rx_indicate_seq,
662 SeqNum);
663 list_add_tail(&pReorderEntry->List,
664 &ieee->RxReorder_Unused_List);
665
666 for (i = 0; i < prxb->nr_subframes; i++)
667 dev_kfree_skb(prxb->subframes[i]);
668 kfree(prxb);
669 prxb = NULL;
670 } else {
671 netdev_dbg(ieee->dev,
672 "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n",
673 pTS->rx_indicate_seq, SeqNum);
674 }
675 } else {
676
677
678
679
680
681 netdev_err(ieee->dev,
682 "%s(): There is no reorder entry! Packet is dropped!\n",
683 __func__);
684 {
685 int i;
686
687 for (i = 0; i < prxb->nr_subframes; i++)
688 dev_kfree_skb(prxb->subframes[i]);
689 kfree(prxb);
690 prxb = NULL;
691 }
692 }
693 }
694
695
696 while (!list_empty(&pTS->rx_pending_pkt_list)) {
697 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n",
698 __func__);
699
700 pReorderEntry = (struct rx_reorder_entry *)
701 list_entry(pTS->rx_pending_pkt_list.prev,
702 struct rx_reorder_entry,
703 List);
704 if (SN_LESS(pReorderEntry->SeqNum, pTS->rx_indicate_seq) ||
705 SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq)) {
706
707 if (index >= REORDER_WIN_SIZE) {
708 netdev_err(ieee->dev,
709 "%s(): Buffer overflow!\n",
710 __func__);
711 bPktInBuf = true;
712 break;
713 }
714
715 list_del_init(&pReorderEntry->List);
716
717 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq))
718 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) %
719 4096;
720
721 ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
722 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n",
723 __func__, pReorderEntry->SeqNum);
724 index++;
725
726 list_add_tail(&pReorderEntry->List,
727 &ieee->RxReorder_Unused_List);
728 } else {
729 bPktInBuf = true;
730 break;
731 }
732 }
733
734
735
736
737 if (index > 0) {
738 if (timer_pending(&pTS->rx_pkt_pending_timer))
739 del_timer_sync(&pTS->rx_pkt_pending_timer);
740 pTS->rx_timeout_indicate_seq = 0xffff;
741
742 if (index > REORDER_WIN_SIZE) {
743 netdev_err(ieee->dev,
744 "%s(): Rx Reorder struct buffer full!\n",
745 __func__);
746 spin_unlock_irqrestore(&(ieee->reorder_spinlock),
747 flags);
748 return;
749 }
750 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
751 bPktInBuf = false;
752 }
753
754 if (bPktInBuf && pTS->rx_timeout_indicate_seq == 0xffff) {
755 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__);
756 pTS->rx_timeout_indicate_seq = pTS->rx_indicate_seq;
757 mod_timer(&pTS->rx_pkt_pending_timer, jiffies +
758 msecs_to_jiffies(pHTInfo->RxReorderPendingTime));
759 }
760 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
761}
762
763static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
764 struct rtllib_rx_stats *rx_stats,
765 struct rtllib_rxb *rxb, u8 *src, u8 *dst)
766{
767 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
768 u16 fc = le16_to_cpu(hdr->frame_ctl);
769
770 u16 LLCOffset = sizeof(struct rtllib_hdr_3addr);
771 u16 ChkLength;
772 bool bIsAggregateFrame = false;
773 u16 nSubframe_Length;
774 u8 nPadding_Length = 0;
775 u16 SeqNum = 0;
776 struct sk_buff *sub_skb;
777
778 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
779 if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
780 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
781 bIsAggregateFrame = true;
782
783 if (RTLLIB_QOS_HAS_SEQ(fc))
784 LLCOffset += 2;
785 if (rx_stats->bContainHTC)
786 LLCOffset += sHTCLng;
787
788 ChkLength = LLCOffset;
789
790 if (skb->len <= ChkLength)
791 return 0;
792
793 skb_pull(skb, LLCOffset);
794 ieee->bIsAggregateFrame = bIsAggregateFrame;
795 if (!bIsAggregateFrame) {
796 rxb->nr_subframes = 1;
797
798
799
800
801
802
803
804
805
806
807 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
808 if (!sub_skb)
809 return 0;
810 skb_reserve(sub_skb, 12);
811 skb_put_data(sub_skb, skb->data, skb->len);
812 sub_skb->dev = ieee->dev;
813
814 rxb->subframes[0] = sub_skb;
815
816 memcpy(rxb->src, src, ETH_ALEN);
817 memcpy(rxb->dst, dst, ETH_ALEN);
818 rxb->subframes[0]->dev = ieee->dev;
819 return 1;
820 }
821
822 rxb->nr_subframes = 0;
823 memcpy(rxb->src, src, ETH_ALEN);
824 memcpy(rxb->dst, dst, ETH_ALEN);
825 while (skb->len > ETHERNET_HEADER_SIZE) {
826
827 nSubframe_Length = *((u16 *)(skb->data + 12));
828 nSubframe_Length = (nSubframe_Length >> 8) +
829 (nSubframe_Length << 8);
830
831 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
832 netdev_info(ieee->dev,
833 "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
834 __func__, rxb->nr_subframes);
835 netdev_info(ieee->dev,
836 "%s: A-MSDU parse error!! Subframe Length: %d\n",
837 __func__, nSubframe_Length);
838 netdev_info(ieee->dev,
839 "nRemain_Length is %d and nSubframe_Length is : %d\n",
840 skb->len, nSubframe_Length);
841 netdev_info(ieee->dev,
842 "The Packet SeqNum is %d\n",
843 SeqNum);
844 return 0;
845 }
846
847
848 skb_pull(skb, ETHERNET_HEADER_SIZE);
849
850
851
852
853
854
855
856
857
858
859 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
860 if (!sub_skb)
861 return 0;
862 skb_reserve(sub_skb, 12);
863 skb_put_data(sub_skb, skb->data, nSubframe_Length);
864
865 sub_skb->dev = ieee->dev;
866 rxb->subframes[rxb->nr_subframes++] = sub_skb;
867 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
868 netdev_dbg(ieee->dev,
869 "ParseSubframe(): Too many Subframes! Packets dropped!\n");
870 break;
871 }
872 skb_pull(skb, nSubframe_Length);
873
874 if (skb->len != 0) {
875 nPadding_Length = 4 - ((nSubframe_Length +
876 ETHERNET_HEADER_SIZE) % 4);
877 if (nPadding_Length == 4)
878 nPadding_Length = 0;
879
880 if (skb->len < nPadding_Length)
881 return 0;
882
883 skb_pull(skb, nPadding_Length);
884 }
885 }
886
887 return rxb->nr_subframes;
888}
889
890
891static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
892 struct sk_buff *skb,
893 struct rtllib_rx_stats *rx_stats)
894{
895 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
896 u16 fc = le16_to_cpu(hdr->frame_ctl);
897 size_t hdrlen;
898
899 hdrlen = rtllib_get_hdrlen(fc);
900 if (HTCCheck(ieee, skb->data)) {
901 if (net_ratelimit())
902 netdev_info(ieee->dev, "%s: find HTCControl!\n",
903 __func__);
904 hdrlen += 4;
905 rx_stats->bContainHTC = true;
906 }
907
908 if (RTLLIB_QOS_HAS_SEQ(fc))
909 rx_stats->bIsQosData = true;
910
911 return hdrlen;
912}
913
914static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
915 struct sk_buff *skb, u8 multicast)
916{
917 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
918 u16 fc, sc;
919 u8 frag, type, stype;
920
921 fc = le16_to_cpu(hdr->frame_ctl);
922 type = WLAN_FC_GET_TYPE(fc);
923 stype = WLAN_FC_GET_STYPE(fc);
924 sc = le16_to_cpu(hdr->seq_ctl);
925 frag = WLAN_GET_SEQ_FRAG(sc);
926
927 if (!ieee->pHTInfo->bCurRxReorderEnable ||
928 !ieee->current_network.qos_data.active ||
929 !IsDataFrame(skb->data) ||
930 IsLegacyDataFrame(skb->data)) {
931 if (!((type == RTLLIB_FTYPE_MGMT) &&
932 (stype == RTLLIB_STYPE_BEACON))) {
933 if (is_duplicate_packet(ieee, hdr))
934 return -1;
935 }
936 } else {
937 struct rx_ts_record *pRxTS = NULL;
938
939 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
940 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
941 if ((fc & (1<<11)) && (frag == pRxTS->rx_last_frag_num) &&
942 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->rx_last_seq_num))
943 return -1;
944 pRxTS->rx_last_frag_num = frag;
945 pRxTS->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc);
946 } else {
947 netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n",
948 __func__);
949 return -1;
950 }
951 }
952
953 return 0;
954}
955
956static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
957 struct rtllib_hdr_4addr *hdr, u8 *dst,
958 u8 *src, u8 *bssid)
959{
960 u16 fc = le16_to_cpu(hdr->frame_ctl);
961
962 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
963 case RTLLIB_FCTL_FROMDS:
964 ether_addr_copy(dst, hdr->addr1);
965 ether_addr_copy(src, hdr->addr3);
966 ether_addr_copy(bssid, hdr->addr2);
967 break;
968 case RTLLIB_FCTL_TODS:
969 ether_addr_copy(dst, hdr->addr3);
970 ether_addr_copy(src, hdr->addr2);
971 ether_addr_copy(bssid, hdr->addr1);
972 break;
973 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
974 ether_addr_copy(dst, hdr->addr3);
975 ether_addr_copy(src, hdr->addr4);
976 ether_addr_copy(bssid, ieee->current_network.bssid);
977 break;
978 default:
979 ether_addr_copy(dst, hdr->addr1);
980 ether_addr_copy(src, hdr->addr2);
981 ether_addr_copy(bssid, hdr->addr3);
982 break;
983 }
984}
985
986static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
987 u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
988{
989 u8 type, stype;
990
991 type = WLAN_FC_GET_TYPE(fc);
992 stype = WLAN_FC_GET_STYPE(fc);
993
994
995 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
996 !ether_addr_equal(ieee->current_network.bssid, bssid) &&
997 !is_zero_ether_addr(ieee->current_network.bssid)) {
998 return -1;
999 }
1000
1001
1002 if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
1003 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
1004 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
1005 !ether_addr_equal(dst, ieee->current_network.bssid) &&
1006 ether_addr_equal(bssid, ieee->current_network.bssid)) {
1007 return -1;
1008 }
1009 }
1010
1011
1012
1013
1014 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
1015 if (stype != RTLLIB_STYPE_DATA &&
1016 stype != RTLLIB_STYPE_DATA_CFACK &&
1017 stype != RTLLIB_STYPE_DATA_CFPOLL &&
1018 stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
1019 stype != RTLLIB_STYPE_QOS_DATA) {
1020 if (stype != RTLLIB_STYPE_NULLFUNC)
1021 netdev_dbg(ieee->dev,
1022 "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
1023 type, stype);
1024 return -1;
1025 }
1026 }
1027
1028 if (ieee->iw_mode != IW_MODE_MESH) {
1029
1030 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1031 return -1;
1032
1033
1034 if (is_multicast_ether_addr(dst)) {
1035 if (memcmp(bssid, ieee->current_network.bssid,
1036 ETH_ALEN))
1037 return -1;
1038 }
1039 }
1040 return 0;
1041}
1042
1043static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1044 struct lib80211_crypt_data **crypt, size_t hdrlen)
1045{
1046 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1047 u16 fc = le16_to_cpu(hdr->frame_ctl);
1048 int idx = 0;
1049
1050 if (ieee->host_decrypt) {
1051 if (skb->len >= hdrlen + 3)
1052 idx = skb->data[hdrlen + 3] >> 6;
1053
1054 *crypt = ieee->crypt_info.crypt[idx];
1055
1056
1057
1058 if (*crypt && ((*crypt)->ops == NULL ||
1059 (*crypt)->ops->decrypt_mpdu == NULL))
1060 *crypt = NULL;
1061
1062 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1063
1064
1065
1066
1067
1068 netdev_dbg(ieee->dev,
1069 "Decryption failed (not set) (SA= %pM)\n",
1070 hdr->addr2);
1071 return -1;
1072 }
1073 }
1074
1075 return 0;
1076}
1077
1078static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1079 struct rtllib_rx_stats *rx_stats,
1080 struct lib80211_crypt_data *crypt, size_t hdrlen)
1081{
1082 struct rtllib_hdr_4addr *hdr;
1083 int keyidx = 0;
1084 u16 fc, sc;
1085 u8 frag;
1086
1087 hdr = (struct rtllib_hdr_4addr *)skb->data;
1088 fc = le16_to_cpu(hdr->frame_ctl);
1089 sc = le16_to_cpu(hdr->seq_ctl);
1090 frag = WLAN_GET_SEQ_FRAG(sc);
1091
1092 if ((!rx_stats->Decrypted))
1093 ieee->need_sw_enc = 1;
1094 else
1095 ieee->need_sw_enc = 0;
1096
1097 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1098 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1099 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
1100 return -1;
1101 }
1102
1103 hdr = (struct rtllib_hdr_4addr *) skb->data;
1104 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1105 int flen;
1106 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1107
1108 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag);
1109
1110 if (!frag_skb) {
1111 netdev_dbg(ieee->dev,
1112 "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
1113 (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1114 WLAN_GET_SEQ_SEQ(sc), frag);
1115 return -1;
1116 }
1117 flen = skb->len;
1118 if (frag != 0)
1119 flen -= hdrlen;
1120
1121 if (frag_skb->tail + flen > frag_skb->end) {
1122 netdev_warn(ieee->dev,
1123 "%s: host decrypted and reassembled frame did not fit skb\n",
1124 __func__);
1125 rtllib_frag_cache_invalidate(ieee, hdr);
1126 return -1;
1127 }
1128
1129 if (frag == 0) {
1130
1131
1132
1133 skb_put_data(frag_skb, skb->data, flen);
1134 } else {
1135
1136
1137
1138 skb_put_data(frag_skb, skb->data + hdrlen, flen);
1139 }
1140 dev_kfree_skb_any(skb);
1141 skb = NULL;
1142
1143 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1144
1145
1146
1147
1148 return -2;
1149 }
1150
1151
1152
1153
1154 skb = frag_skb;
1155 hdr = (struct rtllib_hdr_4addr *) skb->data;
1156 rtllib_frag_cache_invalidate(ieee, hdr);
1157 }
1158
1159
1160
1161
1162 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1163 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1164 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
1165 return -1;
1166 }
1167
1168 hdr = (struct rtllib_hdr_4addr *) skb->data;
1169 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1170 if (
1171 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1172
1173
1174
1175
1176 struct eapol *eap = (struct eapol *)(skb->data +
1177 24);
1178 netdev_dbg(ieee->dev,
1179 "RX: IEEE 802.1X EAPOL frame: %s\n",
1180 eap_get_type(eap->type));
1181 } else {
1182 netdev_dbg(ieee->dev,
1183 "encryption configured, but RX frame not encrypted (SA= %pM)\n",
1184 hdr->addr2);
1185 return -1;
1186 }
1187 }
1188
1189 if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1190 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1191 struct eapol *eap = (struct eapol *)(skb->data + 24);
1192
1193 netdev_dbg(ieee->dev, "RX: IEEE 802.1X EAPOL frame: %s\n",
1194 eap_get_type(eap->type));
1195 }
1196
1197 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1198 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1199 netdev_dbg(ieee->dev,
1200 "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
1201 hdr->addr2);
1202 return -1;
1203 }
1204
1205 return 0;
1206}
1207
1208static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast,
1209 u8 nr_subframes)
1210{
1211 if (unicast) {
1212
1213 if (ieee->state == RTLLIB_LINKED) {
1214 if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1215 ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1216 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1217 if (ieee->LeisurePSLeave)
1218 ieee->LeisurePSLeave(ieee->dev);
1219 }
1220 }
1221 }
1222 ieee->last_rx_ps_time = jiffies;
1223}
1224
1225static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1226 struct rtllib_rx_stats *rx_stats,
1227 struct rtllib_rxb *rxb,
1228 u8 *dst,
1229 u8 *src)
1230{
1231 struct net_device *dev = ieee->dev;
1232 u16 ethertype;
1233 int i = 0;
1234
1235 if (rxb == NULL) {
1236 netdev_info(dev, "%s: rxb is NULL!!\n", __func__);
1237 return;
1238 }
1239
1240 for (i = 0; i < rxb->nr_subframes; i++) {
1241 struct sk_buff *sub_skb = rxb->subframes[i];
1242
1243 if (sub_skb) {
1244
1245
1246
1247 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1248 if (sub_skb->len >= 8 &&
1249 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1250 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1251 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1252
1253
1254
1255 skb_pull(sub_skb, SNAP_SIZE);
1256 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1257 src);
1258 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1259 dst);
1260 } else {
1261 u16 len;
1262
1263
1264
1265 len = sub_skb->len;
1266 memcpy(skb_push(sub_skb, 2), &len, 2);
1267 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1268 src);
1269 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1270 dst);
1271 }
1272
1273 ieee->stats.rx_packets++;
1274 ieee->stats.rx_bytes += sub_skb->len;
1275
1276 if (is_multicast_ether_addr(dst))
1277 ieee->stats.multicast++;
1278
1279
1280 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1281 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1282 sub_skb->dev = dev;
1283 sub_skb->dev->stats.rx_packets++;
1284 sub_skb->dev->stats.rx_bytes += sub_skb->len;
1285
1286 sub_skb->ip_summed = CHECKSUM_NONE;
1287 netif_rx(sub_skb);
1288 }
1289 }
1290 kfree(rxb);
1291}
1292
1293static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1294 struct rtllib_rx_stats *rx_stats)
1295{
1296 struct net_device *dev = ieee->dev;
1297 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1298 struct lib80211_crypt_data *crypt = NULL;
1299 struct rtllib_rxb *rxb = NULL;
1300 struct rx_ts_record *pTS = NULL;
1301 u16 fc, sc, SeqNum = 0;
1302 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1303 u8 dst[ETH_ALEN];
1304 u8 src[ETH_ALEN];
1305 u8 bssid[ETH_ALEN] = {0};
1306
1307 size_t hdrlen = 0;
1308 bool bToOtherSTA = false;
1309 int ret = 0, i = 0;
1310
1311 fc = le16_to_cpu(hdr->frame_ctl);
1312 type = WLAN_FC_GET_TYPE(fc);
1313 stype = WLAN_FC_GET_STYPE(fc);
1314 sc = le16_to_cpu(hdr->seq_ctl);
1315
1316
1317 multicast = is_multicast_ether_addr(hdr->addr1);
1318 unicast = !multicast;
1319 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1320 if (ieee->bNetPromiscuousMode)
1321 bToOtherSTA = true;
1322 else
1323 goto rx_dropped;
1324 }
1325
1326
1327 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1328 if (skb->len < hdrlen) {
1329 netdev_info(dev,
1330 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1331 __func__);
1332 goto rx_dropped;
1333 }
1334
1335
1336 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1337 if (ret < 0)
1338 goto rx_dropped;
1339
1340
1341 if (type == RTLLIB_FTYPE_CTL)
1342 goto rx_dropped;
1343
1344
1345 if (type == RTLLIB_FTYPE_MGMT) {
1346 if (bToOtherSTA)
1347 goto rx_dropped;
1348 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1349 goto rx_dropped;
1350 else
1351 goto rx_exit;
1352 }
1353
1354
1355
1356
1357 if (!bToOtherSTA) {
1358 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1359 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1360 }
1361
1362
1363 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1364
1365
1366 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1367 if (ret < 0)
1368 goto rx_dropped;
1369
1370 if (skb->len == hdrlen)
1371 goto rx_dropped;
1372
1373
1374 if ((ieee->iw_mode == IW_MODE_INFRA) &&
1375 (ieee->sta_sleep == LPS_IS_SLEEP) &&
1376 (ieee->polling) && (!bToOtherSTA)) {
1377 if (WLAN_FC_MORE_DATA(fc)) {
1378
1379
1380
1381 rtllib_sta_ps_send_pspoll_frame(ieee);
1382 } else {
1383 ieee->polling = false;
1384 }
1385 }
1386
1387
1388 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1389 if (ret == -1)
1390 goto rx_dropped;
1391
1392
1393 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1394 if (ret == -1)
1395 goto rx_dropped;
1396 else if (ret == -2)
1397 goto rx_exit;
1398
1399
1400 hdr = (struct rtllib_hdr_4addr *) skb->data;
1401 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1402 && !is_multicast_ether_addr(hdr->addr1)
1403 && (!bToOtherSTA)) {
1404 TID = Frame_QoSTID(skb->data);
1405 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1406 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID,
1407 RX_DIR, true);
1408 if (TID != 0 && TID != 3)
1409 ieee->bis_any_nonbepkts = true;
1410 }
1411
1412
1413
1414 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1415 if (!rxb)
1416 goto rx_dropped;
1417
1418
1419
1420 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1421
1422
1423
1424 for (i = 0; i < rxb->nr_subframes; i++)
1425 dev_kfree_skb(rxb->subframes[i]);
1426 kfree(rxb);
1427 rxb = NULL;
1428 goto rx_dropped;
1429 }
1430
1431
1432
1433
1434 if (!bToOtherSTA) {
1435 if (ieee->bIsAggregateFrame)
1436 nr_subframes = rxb->nr_subframes;
1437 else
1438 nr_subframes = 1;
1439 if (unicast)
1440 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1441 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1442 }
1443
1444
1445 if (!ieee->pHTInfo->bCurRxReorderEnable || pTS == NULL || bToOtherSTA)
1446 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1447 else
1448 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1449
1450 dev_kfree_skb(skb);
1451
1452 rx_exit:
1453 return 1;
1454
1455 rx_dropped:
1456 ieee->stats.rx_dropped++;
1457
1458
1459
1460
1461
1462 return 0;
1463}
1464
1465static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1466 struct rtllib_rx_stats *rx_stats)
1467{
1468 return 0;
1469}
1470
1471static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1472 struct rtllib_rx_stats *rx_stats)
1473{
1474 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1475 u16 fc = le16_to_cpu(hdr->frame_ctl);
1476 size_t hdrlen = rtllib_get_hdrlen(fc);
1477
1478 if (skb->len < hdrlen) {
1479 netdev_info(ieee->dev,
1480 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1481 __func__);
1482 return 0;
1483 }
1484
1485 if (HTCCheck(ieee, skb->data)) {
1486 if (net_ratelimit())
1487 netdev_info(ieee->dev, "%s: Find HTCControl!\n",
1488 __func__);
1489 hdrlen += 4;
1490 }
1491
1492 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1493 ieee->stats.rx_packets++;
1494 ieee->stats.rx_bytes += skb->len;
1495
1496 return 1;
1497}
1498
1499static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1500 struct rtllib_rx_stats *rx_stats)
1501{
1502 return 0;
1503}
1504
1505
1506
1507
1508
1509int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1510 struct rtllib_rx_stats *rx_stats)
1511{
1512 int ret = 0;
1513
1514 if (!ieee || !skb || !rx_stats) {
1515 pr_info("%s: Input parameters NULL!\n", __func__);
1516 goto rx_dropped;
1517 }
1518 if (skb->len < 10) {
1519 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
1520 goto rx_dropped;
1521 }
1522
1523 switch (ieee->iw_mode) {
1524 case IW_MODE_ADHOC:
1525 case IW_MODE_INFRA:
1526 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1527 break;
1528 case IW_MODE_MASTER:
1529 case IW_MODE_REPEAT:
1530 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1531 break;
1532 case IW_MODE_MONITOR:
1533 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1534 break;
1535 case IW_MODE_MESH:
1536 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1537 break;
1538 default:
1539 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
1540 break;
1541 }
1542
1543 return ret;
1544
1545 rx_dropped:
1546 if (ieee)
1547 ieee->stats.rx_dropped++;
1548 return 0;
1549}
1550EXPORT_SYMBOL(rtllib_rx);
1551
1552static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1553
1554
1555static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1556 *info_element, int sub_type)
1557{
1558
1559 if (info_element->elementID != QOS_ELEMENT_ID)
1560 return -1;
1561 if (info_element->qui_subtype != sub_type)
1562 return -1;
1563 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1564 return -1;
1565 if (info_element->qui_type != QOS_OUI_TYPE)
1566 return -1;
1567 if (info_element->version != QOS_VERSION_1)
1568 return -1;
1569
1570 return 0;
1571}
1572
1573
1574
1575static int rtllib_read_qos_param_element(
1576 struct rtllib_qos_parameter_info *element_param,
1577 struct rtllib_info_element *info_element)
1578{
1579 size_t size = sizeof(*element_param);
1580
1581 if (!element_param || !info_element || info_element->len != size - 2)
1582 return -1;
1583
1584 memcpy(element_param, info_element, size);
1585 return rtllib_verify_qos_info(&element_param->info_element,
1586 QOS_OUI_PARAM_SUB_TYPE);
1587}
1588
1589
1590static int rtllib_read_qos_info_element(
1591 struct rtllib_qos_information_element *element_info,
1592 struct rtllib_info_element *info_element)
1593{
1594 size_t size = sizeof(*element_info);
1595
1596 if (!element_info || !info_element || info_element->len != size - 2)
1597 return -1;
1598
1599 memcpy(element_info, info_element, size);
1600 return rtllib_verify_qos_info(element_info, QOS_OUI_INFO_SUB_TYPE);
1601}
1602
1603
1604
1605static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1606 struct rtllib_qos_data *qos_data)
1607{
1608 struct rtllib_qos_ac_parameter *ac_params;
1609 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1610 int i;
1611 u8 aci;
1612 u8 acm;
1613
1614 qos_data->wmm_acm = 0;
1615 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1616 ac_params = &(param_elm->ac_params_record[i]);
1617
1618 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1619 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1620
1621 if (aci >= QOS_QUEUE_NUM)
1622 continue;
1623 switch (aci) {
1624 case 1:
1625
1626 if (acm)
1627 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1628 break;
1629 case 2:
1630
1631 if (acm)
1632 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1633 break;
1634 case 3:
1635
1636 if (acm)
1637 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1638 break;
1639 case 0:
1640 default:
1641
1642 if (acm)
1643 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1644 break;
1645 }
1646
1647 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1648
1649
1650 qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2);
1651
1652 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max &
1653 0x0F);
1654
1655 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max &
1656 0xF0) >> 4);
1657
1658 qos_param->flag[aci] =
1659 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1660 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1661 }
1662 return 0;
1663}
1664
1665
1666
1667
1668
1669static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee,
1670 struct rtllib_info_element
1671 *info_element,
1672 struct rtllib_network *network)
1673{
1674 int rc = 0;
1675 struct rtllib_qos_information_element qos_info_element;
1676
1677 rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1678
1679 if (rc == 0) {
1680 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1681 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1682 } else {
1683 struct rtllib_qos_parameter_info param_element;
1684
1685 rc = rtllib_read_qos_param_element(¶m_element,
1686 info_element);
1687 if (rc == 0) {
1688 rtllib_qos_convert_ac_to_parameters(¶m_element,
1689 &(network->qos_data));
1690 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1691 network->qos_data.param_count =
1692 param_element.info_element.ac_info & 0x0F;
1693 }
1694 }
1695
1696 if (rc == 0) {
1697 netdev_dbg(ieee->dev, "QoS is supported\n");
1698 network->qos_data.supported = 1;
1699 }
1700 return rc;
1701}
1702
1703static const char *get_info_element_string(u16 id)
1704{
1705 switch (id) {
1706 case MFIE_TYPE_SSID:
1707 return "SSID";
1708 case MFIE_TYPE_RATES:
1709 return "RATES";
1710 case MFIE_TYPE_FH_SET:
1711 return "FH_SET";
1712 case MFIE_TYPE_DS_SET:
1713 return "DS_SET";
1714 case MFIE_TYPE_CF_SET:
1715 return "CF_SET";
1716 case MFIE_TYPE_TIM:
1717 return "TIM";
1718 case MFIE_TYPE_IBSS_SET:
1719 return "IBSS_SET";
1720 case MFIE_TYPE_COUNTRY:
1721 return "COUNTRY";
1722 case MFIE_TYPE_HOP_PARAMS:
1723 return "HOP_PARAMS";
1724 case MFIE_TYPE_HOP_TABLE:
1725 return "HOP_TABLE";
1726 case MFIE_TYPE_REQUEST:
1727 return "REQUEST";
1728 case MFIE_TYPE_CHALLENGE:
1729 return "CHALLENGE";
1730 case MFIE_TYPE_POWER_CONSTRAINT:
1731 return "POWER_CONSTRAINT";
1732 case MFIE_TYPE_POWER_CAPABILITY:
1733 return "POWER_CAPABILITY";
1734 case MFIE_TYPE_TPC_REQUEST:
1735 return "TPC_REQUEST";
1736 case MFIE_TYPE_TPC_REPORT:
1737 return "TPC_REPORT";
1738 case MFIE_TYPE_SUPP_CHANNELS:
1739 return "SUPP_CHANNELS";
1740 case MFIE_TYPE_CSA:
1741 return "CSA";
1742 case MFIE_TYPE_MEASURE_REQUEST:
1743 return "MEASURE_REQUEST";
1744 case MFIE_TYPE_MEASURE_REPORT:
1745 return "MEASURE_REPORT";
1746 case MFIE_TYPE_QUIET:
1747 return "QUIET";
1748 case MFIE_TYPE_IBSS_DFS:
1749 return "IBSS_DFS";
1750 case MFIE_TYPE_RSN:
1751 return "RSN";
1752 case MFIE_TYPE_RATES_EX:
1753 return "RATES_EX";
1754 case MFIE_TYPE_GENERIC:
1755 return "GENERIC";
1756 case MFIE_TYPE_QOS_PARAMETER:
1757 return "QOS_PARAMETER";
1758 default:
1759 return "UNKNOWN";
1760 }
1761}
1762
1763static inline void rtllib_extract_country_ie(
1764 struct rtllib_device *ieee,
1765 struct rtllib_info_element *info_element,
1766 struct rtllib_network *network,
1767 u8 *addr2)
1768{
1769 if (IS_DOT11D_ENABLE(ieee)) {
1770 if (info_element->len != 0) {
1771 memcpy(network->CountryIeBuf, info_element->data,
1772 info_element->len);
1773 network->CountryIeLen = info_element->len;
1774
1775 if (!IS_COUNTRY_IE_VALID(ieee)) {
1776 if (rtllib_act_scanning(ieee, false) &&
1777 ieee->FirstIe_InScan)
1778 netdev_info(ieee->dev,
1779 "Received beacon ContryIE, SSID: <%s>\n",
1780 network->ssid);
1781 dot11d_update_country(ieee, addr2,
1782 info_element->len,
1783 info_element->data);
1784 }
1785 }
1786
1787 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1788 UPDATE_CIE_WATCHDOG(ieee);
1789 }
1790}
1791
1792static void rtllib_parse_mife_generic(struct rtllib_device *ieee,
1793 struct rtllib_info_element *info_element,
1794 struct rtllib_network *network,
1795 u16 *tmp_htcap_len,
1796 u16 *tmp_htinfo_len)
1797{
1798 u16 ht_realtek_agg_len = 0;
1799 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1800
1801 if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network))
1802 return;
1803 if (info_element->len >= 4 &&
1804 info_element->data[0] == 0x00 &&
1805 info_element->data[1] == 0x50 &&
1806 info_element->data[2] == 0xf2 &&
1807 info_element->data[3] == 0x01) {
1808 network->wpa_ie_len = min(info_element->len + 2,
1809 MAX_WPA_IE_LEN);
1810 memcpy(network->wpa_ie, info_element, network->wpa_ie_len);
1811 return;
1812 }
1813 if (info_element->len == 7 &&
1814 info_element->data[0] == 0x00 &&
1815 info_element->data[1] == 0xe0 &&
1816 info_element->data[2] == 0x4c &&
1817 info_element->data[3] == 0x01 &&
1818 info_element->data[4] == 0x02)
1819 network->Turbo_Enable = 1;
1820
1821 if (*tmp_htcap_len == 0) {
1822 if (info_element->len >= 4 &&
1823 info_element->data[0] == 0x00 &&
1824 info_element->data[1] == 0x90 &&
1825 info_element->data[2] == 0x4c &&
1826 info_element->data[3] == 0x033) {
1827 *tmp_htcap_len = min_t(u8, info_element->len,
1828 MAX_IE_LEN);
1829 if (*tmp_htcap_len != 0) {
1830 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_EWC;
1831 network->bssht.bd_ht_cap_len = min_t(u16, *tmp_htcap_len,
1832 sizeof(network->bssht.bd_ht_cap_buf));
1833 memcpy(network->bssht.bd_ht_cap_buf,
1834 info_element->data,
1835 network->bssht.bd_ht_cap_len);
1836 }
1837 }
1838 if (*tmp_htcap_len != 0) {
1839 network->bssht.bd_support_ht = true;
1840 network->bssht.bd_ht_1r = ((((struct ht_capab_ele *)(network->bssht.bd_ht_cap_buf))->MCS[1]) == 0);
1841 } else {
1842 network->bssht.bd_support_ht = false;
1843 network->bssht.bd_ht_1r = false;
1844 }
1845 }
1846
1847
1848 if (*tmp_htinfo_len == 0) {
1849 if (info_element->len >= 4 &&
1850 info_element->data[0] == 0x00 &&
1851 info_element->data[1] == 0x90 &&
1852 info_element->data[2] == 0x4c &&
1853 info_element->data[3] == 0x034) {
1854 *tmp_htinfo_len = min_t(u8, info_element->len,
1855 MAX_IE_LEN);
1856 if (*tmp_htinfo_len != 0) {
1857 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_EWC;
1858 network->bssht.bd_ht_info_len = min_t(u16, *tmp_htinfo_len,
1859 sizeof(network->bssht.bd_ht_info_buf));
1860 memcpy(network->bssht.bd_ht_info_buf,
1861 info_element->data,
1862 network->bssht.bd_ht_info_len);
1863 }
1864 }
1865 }
1866
1867 if (network->bssht.bd_support_ht) {
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 ht_realtek_agg_len = min_t(u8, info_element->len,
1874 MAX_IE_LEN);
1875 memcpy(ht_realtek_agg_buf, info_element->data,
1876 info_element->len);
1877 }
1878 if (ht_realtek_agg_len >= 5) {
1879 network->realtek_cap_exit = true;
1880 network->bssht.bd_rt2rt_aggregation = true;
1881
1882 if ((ht_realtek_agg_buf[4] == 1) &&
1883 (ht_realtek_agg_buf[5] & 0x02))
1884 network->bssht.bd_rt2rt_long_slot_time = true;
1885
1886 if ((ht_realtek_agg_buf[4] == 1) &&
1887 (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1888 network->bssht.rt2rt_ht_mode |= RT_HT_CAP_USE_92SE;
1889 }
1890 }
1891 if (ht_realtek_agg_len >= 5) {
1892 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1893 network->bssht.rt2rt_ht_mode |= RT_HT_CAP_USE_SOFTAP;
1894 }
1895
1896 if ((info_element->len >= 3 &&
1897 info_element->data[0] == 0x00 &&
1898 info_element->data[1] == 0x05 &&
1899 info_element->data[2] == 0xb5) ||
1900 (info_element->len >= 3 &&
1901 info_element->data[0] == 0x00 &&
1902 info_element->data[1] == 0x0a &&
1903 info_element->data[2] == 0xf7) ||
1904 (info_element->len >= 3 &&
1905 info_element->data[0] == 0x00 &&
1906 info_element->data[1] == 0x10 &&
1907 info_element->data[2] == 0x18)) {
1908 network->broadcom_cap_exist = true;
1909 }
1910 if (info_element->len >= 3 &&
1911 info_element->data[0] == 0x00 &&
1912 info_element->data[1] == 0x0c &&
1913 info_element->data[2] == 0x43)
1914 network->ralink_cap_exist = true;
1915 if ((info_element->len >= 3 &&
1916 info_element->data[0] == 0x00 &&
1917 info_element->data[1] == 0x03 &&
1918 info_element->data[2] == 0x7f) ||
1919 (info_element->len >= 3 &&
1920 info_element->data[0] == 0x00 &&
1921 info_element->data[1] == 0x13 &&
1922 info_element->data[2] == 0x74))
1923 network->atheros_cap_exist = true;
1924
1925 if ((info_element->len >= 3 &&
1926 info_element->data[0] == 0x00 &&
1927 info_element->data[1] == 0x50 &&
1928 info_element->data[2] == 0x43))
1929 network->marvell_cap_exist = true;
1930 if (info_element->len >= 3 &&
1931 info_element->data[0] == 0x00 &&
1932 info_element->data[1] == 0x40 &&
1933 info_element->data[2] == 0x96)
1934 network->cisco_cap_exist = true;
1935
1936
1937 if (info_element->len >= 3 &&
1938 info_element->data[0] == 0x00 &&
1939 info_element->data[1] == 0x0a &&
1940 info_element->data[2] == 0xf5)
1941 network->airgo_cap_exist = true;
1942
1943 if (info_element->len > 4 &&
1944 info_element->data[0] == 0x00 &&
1945 info_element->data[1] == 0x40 &&
1946 info_element->data[2] == 0x96 &&
1947 info_element->data[3] == 0x01) {
1948 if (info_element->len == 6) {
1949 memcpy(network->CcxRmState, &info_element->data[4], 2);
1950 if (network->CcxRmState[0] != 0)
1951 network->bCcxRmEnable = true;
1952 else
1953 network->bCcxRmEnable = false;
1954 network->MBssidMask = network->CcxRmState[1] & 0x07;
1955 if (network->MBssidMask != 0) {
1956 network->bMBssidValid = true;
1957 network->MBssidMask = 0xff <<
1958 (network->MBssidMask);
1959 ether_addr_copy(network->MBssid,
1960 network->bssid);
1961 network->MBssid[5] &= network->MBssidMask;
1962 } else {
1963 network->bMBssidValid = false;
1964 }
1965 } else {
1966 network->bCcxRmEnable = false;
1967 }
1968 }
1969 if (info_element->len > 4 &&
1970 info_element->data[0] == 0x00 &&
1971 info_element->data[1] == 0x40 &&
1972 info_element->data[2] == 0x96 &&
1973 info_element->data[3] == 0x03) {
1974 if (info_element->len == 5) {
1975 network->bWithCcxVerNum = true;
1976 network->BssCcxVerNumber = info_element->data[4];
1977 } else {
1978 network->bWithCcxVerNum = false;
1979 network->BssCcxVerNumber = 0;
1980 }
1981 }
1982 if (info_element->len > 4 &&
1983 info_element->data[0] == 0x00 &&
1984 info_element->data[1] == 0x50 &&
1985 info_element->data[2] == 0xf2 &&
1986 info_element->data[3] == 0x04) {
1987 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n",
1988 info_element->len);
1989 network->wzc_ie_len = min(info_element->len+2, MAX_WZC_IE_LEN);
1990 memcpy(network->wzc_ie, info_element, network->wzc_ie_len);
1991 }
1992}
1993
1994static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element,
1995 struct rtllib_network *network,
1996 u16 *tmp_htcap_len)
1997{
1998 struct bss_ht *ht = &network->bssht;
1999
2000 *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
2001 if (*tmp_htcap_len != 0) {
2002 ht->bd_ht_spec_ver = HT_SPEC_VER_EWC;
2003 ht->bd_ht_cap_len = min_t(u16, *tmp_htcap_len,
2004 sizeof(ht->bd_ht_cap_buf));
2005 memcpy(ht->bd_ht_cap_buf, info_element->data, ht->bd_ht_cap_len);
2006
2007 ht->bd_support_ht = true;
2008 ht->bd_ht_1r = ((((struct ht_capab_ele *)
2009 ht->bd_ht_cap_buf))->MCS[1]) == 0;
2010
2011 ht->bd_bandwidth = (enum ht_channel_width)
2012 (((struct ht_capab_ele *)
2013 (ht->bd_ht_cap_buf))->ChlWidth);
2014 } else {
2015 ht->bd_support_ht = false;
2016 ht->bd_ht_1r = false;
2017 ht->bd_bandwidth = HT_CHANNEL_WIDTH_20;
2018 }
2019}
2020
2021int rtllib_parse_info_param(struct rtllib_device *ieee,
2022 struct rtllib_info_element *info_element,
2023 u16 length,
2024 struct rtllib_network *network,
2025 struct rtllib_rx_stats *stats)
2026{
2027 u8 i;
2028 short offset;
2029 u16 tmp_htcap_len = 0;
2030 u16 tmp_htinfo_len = 0;
2031 char rates_str[64];
2032 char *p;
2033
2034 while (length >= sizeof(*info_element)) {
2035 if (sizeof(*info_element) + info_element->len > length) {
2036 netdev_dbg(ieee->dev,
2037 "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
2038 info_element->len + sizeof(*info_element),
2039 length, info_element->id);
2040
2041
2042
2043
2044 break;
2045 }
2046
2047 switch (info_element->id) {
2048 case MFIE_TYPE_SSID:
2049 if (rtllib_is_empty_essid(info_element->data,
2050 info_element->len)) {
2051 network->flags |= NETWORK_EMPTY_ESSID;
2052 break;
2053 }
2054
2055 network->ssid_len = min(info_element->len,
2056 (u8) IW_ESSID_MAX_SIZE);
2057 memcpy(network->ssid, info_element->data,
2058 network->ssid_len);
2059 if (network->ssid_len < IW_ESSID_MAX_SIZE)
2060 memset(network->ssid + network->ssid_len, 0,
2061 IW_ESSID_MAX_SIZE - network->ssid_len);
2062
2063 netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n",
2064 network->ssid, network->ssid_len);
2065 break;
2066
2067 case MFIE_TYPE_RATES:
2068 p = rates_str;
2069 network->rates_len = min(info_element->len,
2070 MAX_RATES_LENGTH);
2071 for (i = 0; i < network->rates_len; i++) {
2072 network->rates[i] = info_element->data[i];
2073 p += scnprintf(p, sizeof(rates_str) -
2074 (p - rates_str), "%02X ",
2075 network->rates[i]);
2076 if (rtllib_is_ofdm_rate
2077 (info_element->data[i])) {
2078 network->flags |= NETWORK_HAS_OFDM;
2079 if (info_element->data[i] &
2080 RTLLIB_BASIC_RATE_MASK)
2081 network->flags &=
2082 ~NETWORK_HAS_CCK;
2083 }
2084
2085 if (rtllib_is_cck_rate
2086 (info_element->data[i])) {
2087 network->flags |= NETWORK_HAS_CCK;
2088 }
2089 }
2090
2091 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n",
2092 rates_str, network->rates_len);
2093 break;
2094
2095 case MFIE_TYPE_RATES_EX:
2096 p = rates_str;
2097 network->rates_ex_len = min(info_element->len,
2098 MAX_RATES_EX_LENGTH);
2099 for (i = 0; i < network->rates_ex_len; i++) {
2100 network->rates_ex[i] = info_element->data[i];
2101 p += scnprintf(p, sizeof(rates_str) -
2102 (p - rates_str), "%02X ",
2103 network->rates_ex[i]);
2104 if (rtllib_is_ofdm_rate
2105 (info_element->data[i])) {
2106 network->flags |= NETWORK_HAS_OFDM;
2107 if (info_element->data[i] &
2108 RTLLIB_BASIC_RATE_MASK)
2109 network->flags &=
2110 ~NETWORK_HAS_CCK;
2111 }
2112 }
2113
2114 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n",
2115 rates_str, network->rates_ex_len);
2116 break;
2117
2118 case MFIE_TYPE_DS_SET:
2119 netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n",
2120 info_element->data[0]);
2121 network->channel = info_element->data[0];
2122 break;
2123
2124 case MFIE_TYPE_FH_SET:
2125 netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n");
2126 break;
2127
2128 case MFIE_TYPE_CF_SET:
2129 netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n");
2130 break;
2131
2132 case MFIE_TYPE_TIM:
2133 if (info_element->len < 4)
2134 break;
2135
2136 network->tim.tim_count = info_element->data[0];
2137 network->tim.tim_period = info_element->data[1];
2138
2139 network->dtim_period = info_element->data[1];
2140 if (ieee->state != RTLLIB_LINKED)
2141 break;
2142 network->last_dtim_sta_time = jiffies;
2143
2144 network->dtim_data = RTLLIB_DTIM_VALID;
2145
2146
2147 if (info_element->data[2] & 1)
2148 network->dtim_data |= RTLLIB_DTIM_MBCAST;
2149
2150 offset = (info_element->data[2] >> 1)*2;
2151
2152
2153 if (ieee->assoc_id < 8*offset ||
2154 ieee->assoc_id > 8*(offset + info_element->len - 3))
2155 break;
2156
2157 offset = (ieee->assoc_id / 8) - offset;
2158 if (info_element->data[3 + offset] &
2159 (1 << (ieee->assoc_id % 8)))
2160 network->dtim_data |= RTLLIB_DTIM_UCAST;
2161
2162 network->listen_interval = network->dtim_period;
2163 break;
2164
2165 case MFIE_TYPE_ERP:
2166 network->erp_value = info_element->data[0];
2167 network->flags |= NETWORK_HAS_ERP_VALUE;
2168 netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n",
2169 network->erp_value);
2170 break;
2171 case MFIE_TYPE_IBSS_SET:
2172 network->atim_window = info_element->data[0];
2173 netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n",
2174 network->atim_window);
2175 break;
2176
2177 case MFIE_TYPE_CHALLENGE:
2178 netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n");
2179 break;
2180
2181 case MFIE_TYPE_GENERIC:
2182 netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n",
2183 info_element->len);
2184
2185 rtllib_parse_mife_generic(ieee, info_element, network,
2186 &tmp_htcap_len,
2187 &tmp_htinfo_len);
2188 break;
2189
2190 case MFIE_TYPE_RSN:
2191 netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n",
2192 info_element->len);
2193 network->rsn_ie_len = min(info_element->len + 2,
2194 MAX_WPA_IE_LEN);
2195 memcpy(network->rsn_ie, info_element,
2196 network->rsn_ie_len);
2197 break;
2198
2199 case MFIE_TYPE_HT_CAP:
2200 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n",
2201 info_element->len);
2202
2203 rtllib_parse_mfie_ht_cap(info_element, network,
2204 &tmp_htcap_len);
2205 break;
2206
2207
2208 case MFIE_TYPE_HT_INFO:
2209 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n",
2210 info_element->len);
2211 tmp_htinfo_len = min_t(u8, info_element->len,
2212 MAX_IE_LEN);
2213 if (tmp_htinfo_len) {
2214 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_IEEE;
2215 network->bssht.bd_ht_info_len = tmp_htinfo_len >
2216 sizeof(network->bssht.bd_ht_info_buf) ?
2217 sizeof(network->bssht.bd_ht_info_buf) :
2218 tmp_htinfo_len;
2219 memcpy(network->bssht.bd_ht_info_buf,
2220 info_element->data,
2221 network->bssht.bd_ht_info_len);
2222 }
2223 break;
2224
2225 case MFIE_TYPE_AIRONET:
2226 netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n",
2227 info_element->len);
2228 if (info_element->len > IE_CISCO_FLAG_POSITION) {
2229 network->bWithAironetIE = true;
2230
2231 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2232 & SUPPORT_CKIP_MIC) ||
2233 (info_element->data[IE_CISCO_FLAG_POSITION]
2234 & SUPPORT_CKIP_PK))
2235 network->bCkipSupported = true;
2236 else
2237 network->bCkipSupported = false;
2238 } else {
2239 network->bWithAironetIE = false;
2240 network->bCkipSupported = false;
2241 }
2242 break;
2243 case MFIE_TYPE_QOS_PARAMETER:
2244 netdev_err(ieee->dev,
2245 "QoS Error need to parse QOS_PARAMETER IE\n");
2246 break;
2247
2248 case MFIE_TYPE_COUNTRY:
2249 netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n",
2250 info_element->len);
2251 rtllib_extract_country_ie(ieee, info_element, network,
2252 network->bssid);
2253 break;
2254
2255 default:
2256 netdev_dbg(ieee->dev,
2257 "Unsupported info element: %s (%d)\n",
2258 get_info_element_string(info_element->id),
2259 info_element->id);
2260 break;
2261 }
2262
2263 length -= sizeof(*info_element) + info_element->len;
2264 info_element =
2265 (struct rtllib_info_element *)&info_element->data[info_element->len];
2266 }
2267
2268 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2269 !network->cisco_cap_exist && !network->ralink_cap_exist &&
2270 !network->bssht.bd_rt2rt_aggregation)
2271 network->unknown_cap_exist = true;
2272 else
2273 network->unknown_cap_exist = false;
2274 return 0;
2275}
2276
2277static long rtllib_translate_todbm(u8 signal_strength_index)
2278{
2279 long signal_power;
2280
2281 signal_power = (long)((signal_strength_index + 1) >> 1);
2282 signal_power -= 95;
2283
2284 return signal_power;
2285}
2286
2287static inline int rtllib_network_init(
2288 struct rtllib_device *ieee,
2289 struct rtllib_probe_response *beacon,
2290 struct rtllib_network *network,
2291 struct rtllib_rx_stats *stats)
2292{
2293 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2294
2295
2296 ether_addr_copy(network->bssid, beacon->header.addr3);
2297 network->capability = le16_to_cpu(beacon->capability);
2298 network->last_scanned = jiffies;
2299 network->time_stamp[0] = beacon->time_stamp[0];
2300 network->time_stamp[1] = beacon->time_stamp[1];
2301 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2302
2303 network->listen_interval = 0x0A;
2304 network->rates_len = network->rates_ex_len = 0;
2305 network->ssid_len = 0;
2306 network->hidden_ssid_len = 0;
2307 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2308 network->flags = 0;
2309 network->atim_window = 0;
2310 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2311 0x3 : 0x0;
2312 network->berp_info_valid = false;
2313 network->broadcom_cap_exist = false;
2314 network->ralink_cap_exist = false;
2315 network->atheros_cap_exist = false;
2316 network->cisco_cap_exist = false;
2317 network->unknown_cap_exist = false;
2318 network->realtek_cap_exit = false;
2319 network->marvell_cap_exist = false;
2320 network->airgo_cap_exist = false;
2321 network->Turbo_Enable = 0;
2322 network->SignalStrength = stats->SignalStrength;
2323 network->RSSI = stats->SignalStrength;
2324 network->CountryIeLen = 0;
2325 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2326 HTInitializeBssDesc(&network->bssht);
2327 if (stats->freq == RTLLIB_52GHZ_BAND) {
2328
2329 network->channel = stats->received_channel;
2330 } else
2331 network->flags |= NETWORK_HAS_CCK;
2332
2333 network->wpa_ie_len = 0;
2334 network->rsn_ie_len = 0;
2335 network->wzc_ie_len = 0;
2336
2337 if (rtllib_parse_info_param(ieee,
2338 beacon->info_element,
2339 (stats->len - sizeof(*beacon)),
2340 network,
2341 stats))
2342 return 1;
2343
2344 network->mode = 0;
2345 if (stats->freq == RTLLIB_52GHZ_BAND)
2346 network->mode = IEEE_A;
2347 else {
2348 if (network->flags & NETWORK_HAS_OFDM)
2349 network->mode |= IEEE_G;
2350 if (network->flags & NETWORK_HAS_CCK)
2351 network->mode |= IEEE_B;
2352 }
2353
2354 if (network->mode == 0) {
2355 netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n",
2356 escape_essid(network->ssid, network->ssid_len),
2357 network->bssid);
2358 return 1;
2359 }
2360
2361 if (network->bssht.bd_support_ht) {
2362 if (network->mode == IEEE_A)
2363 network->mode = IEEE_N_5G;
2364 else if (network->mode & (IEEE_G | IEEE_B))
2365 network->mode = IEEE_N_24G;
2366 }
2367 if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2368 network->flags |= NETWORK_EMPTY_ESSID;
2369 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2370 stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2371
2372 memcpy(&network->stats, stats, sizeof(network->stats));
2373
2374 return 0;
2375}
2376
2377static inline int is_same_network(struct rtllib_network *src,
2378 struct rtllib_network *dst, u8 ssidbroad)
2379{
2380
2381
2382
2383
2384
2385 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2386 (src->channel == dst->channel) &&
2387 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2388 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2389 (!ssidbroad)) &&
2390 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2391 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2392 ((src->capability & WLAN_CAPABILITY_ESS) ==
2393 (dst->capability & WLAN_CAPABILITY_ESS)));
2394}
2395
2396
2397static inline void update_network(struct rtllib_device *ieee,
2398 struct rtllib_network *dst,
2399 struct rtllib_network *src)
2400{
2401 int qos_active;
2402 u8 old_param;
2403
2404 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2405 dst->capability = src->capability;
2406 memcpy(dst->rates, src->rates, src->rates_len);
2407 dst->rates_len = src->rates_len;
2408 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2409 dst->rates_ex_len = src->rates_ex_len;
2410 if (src->ssid_len > 0) {
2411 if (dst->ssid_len == 0) {
2412 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2413 dst->hidden_ssid_len = src->ssid_len;
2414 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2415 } else {
2416 memset(dst->ssid, 0, dst->ssid_len);
2417 dst->ssid_len = src->ssid_len;
2418 memcpy(dst->ssid, src->ssid, src->ssid_len);
2419 }
2420 }
2421 dst->mode = src->mode;
2422 dst->flags = src->flags;
2423 dst->time_stamp[0] = src->time_stamp[0];
2424 dst->time_stamp[1] = src->time_stamp[1];
2425 if (src->flags & NETWORK_HAS_ERP_VALUE) {
2426 dst->erp_value = src->erp_value;
2427 dst->berp_info_valid = src->berp_info_valid = true;
2428 }
2429 dst->beacon_interval = src->beacon_interval;
2430 dst->listen_interval = src->listen_interval;
2431 dst->atim_window = src->atim_window;
2432 dst->dtim_period = src->dtim_period;
2433 dst->dtim_data = src->dtim_data;
2434 dst->last_dtim_sta_time = src->last_dtim_sta_time;
2435 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2436
2437 dst->bssht.bd_support_ht = src->bssht.bd_support_ht;
2438 dst->bssht.bd_rt2rt_aggregation = src->bssht.bd_rt2rt_aggregation;
2439 dst->bssht.bd_ht_cap_len = src->bssht.bd_ht_cap_len;
2440 memcpy(dst->bssht.bd_ht_cap_buf, src->bssht.bd_ht_cap_buf,
2441 src->bssht.bd_ht_cap_len);
2442 dst->bssht.bd_ht_info_len = src->bssht.bd_ht_info_len;
2443 memcpy(dst->bssht.bd_ht_info_buf, src->bssht.bd_ht_info_buf,
2444 src->bssht.bd_ht_info_len);
2445 dst->bssht.bd_ht_spec_ver = src->bssht.bd_ht_spec_ver;
2446 dst->bssht.bd_rt2rt_long_slot_time = src->bssht.bd_rt2rt_long_slot_time;
2447 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2448 dst->ralink_cap_exist = src->ralink_cap_exist;
2449 dst->atheros_cap_exist = src->atheros_cap_exist;
2450 dst->realtek_cap_exit = src->realtek_cap_exit;
2451 dst->marvell_cap_exist = src->marvell_cap_exist;
2452 dst->cisco_cap_exist = src->cisco_cap_exist;
2453 dst->airgo_cap_exist = src->airgo_cap_exist;
2454 dst->unknown_cap_exist = src->unknown_cap_exist;
2455 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2456 dst->wpa_ie_len = src->wpa_ie_len;
2457 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2458 dst->rsn_ie_len = src->rsn_ie_len;
2459 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2460 dst->wzc_ie_len = src->wzc_ie_len;
2461
2462 dst->last_scanned = jiffies;
2463
2464 qos_active = dst->qos_data.active;
2465 old_param = dst->qos_data.param_count;
2466 dst->qos_data.supported = src->qos_data.supported;
2467 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2468 memcpy(&dst->qos_data, &src->qos_data,
2469 sizeof(struct rtllib_qos_data));
2470 if (dst->qos_data.supported == 1) {
2471 if (dst->ssid_len)
2472 netdev_dbg(ieee->dev,
2473 "QoS the network %s is QoS supported\n",
2474 dst->ssid);
2475 else
2476 netdev_dbg(ieee->dev,
2477 "QoS the network is QoS supported\n");
2478 }
2479 dst->qos_data.active = qos_active;
2480 dst->qos_data.old_param_count = old_param;
2481
2482 dst->wmm_info = src->wmm_info;
2483 if (src->wmm_param[0].ac_aci_acm_aifsn ||
2484 src->wmm_param[1].ac_aci_acm_aifsn ||
2485 src->wmm_param[2].ac_aci_acm_aifsn ||
2486 src->wmm_param[3].ac_aci_acm_aifsn)
2487 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2488
2489 dst->SignalStrength = src->SignalStrength;
2490 dst->RSSI = src->RSSI;
2491 dst->Turbo_Enable = src->Turbo_Enable;
2492
2493 dst->CountryIeLen = src->CountryIeLen;
2494 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2495
2496 dst->bWithAironetIE = src->bWithAironetIE;
2497 dst->bCkipSupported = src->bCkipSupported;
2498 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2499 dst->bCcxRmEnable = src->bCcxRmEnable;
2500 dst->MBssidMask = src->MBssidMask;
2501 dst->bMBssidValid = src->bMBssidValid;
2502 memcpy(dst->MBssid, src->MBssid, 6);
2503 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2504 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2505}
2506
2507static inline int is_beacon(u16 fc)
2508{
2509 return (WLAN_FC_GET_STYPE(fc) == RTLLIB_STYPE_BEACON);
2510}
2511
2512static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2513{
2514 if (channel > MAX_CHANNEL_NUMBER) {
2515 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2516 return 0;
2517 }
2518
2519 if (rtllib->active_channel_map[channel] == 2)
2520 return 1;
2521
2522 return 0;
2523}
2524
2525int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2526{
2527 if (channel > MAX_CHANNEL_NUMBER) {
2528 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2529 return 0;
2530 }
2531 if (rtllib->active_channel_map[channel] > 0)
2532 return 1;
2533
2534 return 0;
2535}
2536EXPORT_SYMBOL(rtllib_legal_channel);
2537
2538static inline void rtllib_process_probe_response(
2539 struct rtllib_device *ieee,
2540 struct rtllib_probe_response *beacon,
2541 struct rtllib_rx_stats *stats)
2542{
2543 struct rtllib_network *target;
2544 struct rtllib_network *oldest = NULL;
2545 struct rtllib_info_element *info_element = &beacon->info_element[0];
2546 unsigned long flags;
2547 short renew;
2548 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2549 GFP_ATOMIC);
2550 u16 frame_ctl = le16_to_cpu(beacon->header.frame_ctl);
2551
2552 if (!network)
2553 return;
2554
2555 netdev_dbg(ieee->dev,
2556 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2557 escape_essid(info_element->data, info_element->len),
2558 beacon->header.addr3,
2559 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2560 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2561 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2562 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2563 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2564 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2565 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2566 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2567 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2568 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2569 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2570 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2571 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2572 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2573 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2574 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2575
2576 if (rtllib_network_init(ieee, beacon, network, stats)) {
2577 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n",
2578 escape_essid(info_element->data, info_element->len),
2579 beacon->header.addr3,
2580 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2581 goto free_network;
2582 }
2583
2584
2585 if (!rtllib_legal_channel(ieee, network->channel))
2586 goto free_network;
2587
2588 if (WLAN_FC_GET_STYPE(frame_ctl) == RTLLIB_STYPE_PROBE_RESP) {
2589 if (IsPassiveChannel(ieee, network->channel)) {
2590 netdev_info(ieee->dev,
2591 "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2592 network->channel);
2593 goto free_network;
2594 }
2595 }
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609 spin_lock_irqsave(&ieee->lock, flags);
2610 if (is_same_network(&ieee->current_network, network,
2611 (network->ssid_len ? 1 : 0))) {
2612 update_network(ieee, &ieee->current_network, network);
2613 if ((ieee->current_network.mode == IEEE_N_24G ||
2614 ieee->current_network.mode == IEEE_G) &&
2615 ieee->current_network.berp_info_valid) {
2616 if (ieee->current_network.erp_value & ERP_UseProtection)
2617 ieee->current_network.buseprotection = true;
2618 else
2619 ieee->current_network.buseprotection = false;
2620 }
2621 if (is_beacon(frame_ctl)) {
2622 if (ieee->state >= RTLLIB_LINKED)
2623 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2624 }
2625 }
2626 list_for_each_entry(target, &ieee->network_list, list) {
2627 if (is_same_network(target, network,
2628 (target->ssid_len ? 1 : 0)))
2629 break;
2630 if ((oldest == NULL) ||
2631 (target->last_scanned < oldest->last_scanned))
2632 oldest = target;
2633 }
2634
2635
2636
2637
2638 if (&target->list == &ieee->network_list) {
2639 if (list_empty(&ieee->network_free_list)) {
2640
2641 list_del(&oldest->list);
2642 target = oldest;
2643 netdev_dbg(ieee->dev,
2644 "Expired '%s' ( %pM) from network list.\n",
2645 escape_essid(target->ssid, target->ssid_len),
2646 target->bssid);
2647 } else {
2648
2649 target = list_entry(ieee->network_free_list.next,
2650 struct rtllib_network, list);
2651 list_del(ieee->network_free_list.next);
2652 }
2653
2654 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n",
2655 escape_essid(network->ssid, network->ssid_len),
2656 network->bssid,
2657 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2658
2659 memcpy(target, network, sizeof(*target));
2660 list_add_tail(&target->list, &ieee->network_list);
2661 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2662 rtllib_softmac_new_net(ieee, network);
2663 } else {
2664 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n",
2665 escape_essid(target->ssid, target->ssid_len),
2666 target->bssid,
2667 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2668
2669
2670
2671
2672
2673 renew = !time_after(target->last_scanned + ieee->scan_age,
2674 jiffies);
2675 if ((!target->ssid_len) &&
2676 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2677 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2678 (strncmp(ieee->current_network.ssid, network->ssid,
2679 network->ssid_len) == 0) &&
2680 (ieee->state == RTLLIB_NOLINK))))
2681 renew = 1;
2682 update_network(ieee, target, network);
2683 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2684 rtllib_softmac_new_net(ieee, network);
2685 }
2686
2687 spin_unlock_irqrestore(&ieee->lock, flags);
2688 if (is_beacon(frame_ctl) &&
2689 is_same_network(&ieee->current_network, network,
2690 (network->ssid_len ? 1 : 0)) &&
2691 (ieee->state == RTLLIB_LINKED)) {
2692 if (ieee->handle_beacon != NULL)
2693 ieee->handle_beacon(ieee->dev, beacon,
2694 &ieee->current_network);
2695 }
2696free_network:
2697 kfree(network);
2698}
2699
2700static void rtllib_rx_mgt(struct rtllib_device *ieee,
2701 struct sk_buff *skb,
2702 struct rtllib_rx_stats *stats)
2703{
2704 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
2705
2706 if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2707 RTLLIB_STYPE_PROBE_RESP) &&
2708 (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2709 RTLLIB_STYPE_BEACON))
2710 ieee->last_rx_ps_time = jiffies;
2711
2712 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2713
2714 case RTLLIB_STYPE_BEACON:
2715 netdev_dbg(ieee->dev, "received BEACON (%d)\n",
2716 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2717 rtllib_process_probe_response(
2718 ieee, (struct rtllib_probe_response *)header,
2719 stats);
2720
2721 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2722 ieee->iw_mode == IW_MODE_INFRA &&
2723 ieee->state == RTLLIB_LINKED))
2724 tasklet_schedule(&ieee->ps_task);
2725
2726 break;
2727
2728 case RTLLIB_STYPE_PROBE_RESP:
2729 netdev_dbg(ieee->dev, "received PROBE RESPONSE (%d)\n",
2730 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2731 rtllib_process_probe_response(ieee,
2732 (struct rtllib_probe_response *)header, stats);
2733 break;
2734 case RTLLIB_STYPE_PROBE_REQ:
2735 netdev_dbg(ieee->dev, "received PROBE RESQUEST (%d)\n",
2736 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2737 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2738 ((ieee->iw_mode == IW_MODE_ADHOC ||
2739 ieee->iw_mode == IW_MODE_MASTER) &&
2740 ieee->state == RTLLIB_LINKED))
2741 rtllib_rx_probe_rq(ieee, skb);
2742 break;
2743 }
2744}
2745
