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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / staging / rtl8192e / rtllib_rx.c
blob8d0af5ed8ecf7e30714776965a4b0f085bdc3d5d
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 <linux/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 /* rtllib_rx_frame_mgtmt
202 *
203 * Responsible for handling management control frames
204 *
205 * Called by rtllib_rx */
206 static inline int
207 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
208 struct rtllib_rx_stats *rx_stats, u16 type,
209 u16 stype)
210 {
211 /* On the struct stats definition there is written that
212 * this is not mandatory.... but seems that the probe
213 * response parser uses it
214 */
215 struct rtllib_hdr_3addr * hdr = (struct rtllib_hdr_3addr *)skb->data;
216
217 rx_stats->len = skb->len;
218 rtllib_rx_mgt(ieee, skb, rx_stats);
219 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
220 dev_kfree_skb_any(skb);
221 return 0;
222 }
223 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
224
225 dev_kfree_skb_any(skb);
226
227 return 0;
228 }
229
230 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
231 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
232 static unsigned char rfc1042_header[] = {
233 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
234 };
235 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
236 static unsigned char bridge_tunnel_header[] = {
237 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
238 };
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 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
294 tcb_desc->bHwSec = 1;
295
296 if (ieee->need_sw_enc)
297 tcb_desc->bHwSec = 0;
298 }
299
300 hdr = (struct rtllib_hdr_4addr *) skb->data;
301 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
302
303 atomic_inc(&crypt->refcnt);
304 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
305 atomic_dec(&crypt->refcnt);
306 if (res < 0) {
307 RTLLIB_DEBUG_DROP(
308 "decryption failed (SA= %pM"
309 ") res=%d\n", hdr->addr2, res);
310 if (res == -2)
311 RTLLIB_DEBUG_DROP("Decryption failed ICV "
312 "mismatch (key %d)\n",
313 skb->data[hdrlen + 3] >> 6);
314 ieee->ieee_stats.rx_discards_undecryptable++;
315 return -1;
316 }
317
318 return res;
319 }
320
321
322 /* Called only as a tasklet (software IRQ), by rtllib_rx */
323 static inline int
324 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
325 int keyidx, struct rtllib_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 *)(skb->cb + MAX_DEV_ADDR_SIZE);
334 tcb_desc->bHwSec = 1;
335
336 if (ieee->need_sw_enc)
337 tcb_desc->bHwSec = 0;
338 }
339
340 hdr = (struct rtllib_hdr_4addr *) skb->data;
341 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
342
343 atomic_inc(&crypt->refcnt);
344 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv, ieee);
345 atomic_dec(&crypt->refcnt);
346 if (res < 0) {
347 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
348 " (SA= %pM keyidx=%d)\n",
349 ieee->dev->name, hdr->addr2, keyidx);
350 return -1;
351 }
352
353 return 0;
354 }
355
356
357 /* this function is stolen from ipw2200 driver*/
358 #define IEEE_PACKET_RETRY_TIME (5*HZ)
359 static int is_duplicate_packet(struct rtllib_device *ieee,
360 struct rtllib_hdr_4addr *header)
361 {
362 u16 fc = le16_to_cpu(header->frame_ctl);
363 u16 sc = le16_to_cpu(header->seq_ctl);
364 u16 seq = WLAN_GET_SEQ_SEQ(sc);
365 u16 frag = WLAN_GET_SEQ_FRAG(sc);
366 u16 *last_seq, *last_frag;
367 unsigned long *last_time;
368 struct rtllib_hdr_3addrqos *hdr_3addrqos;
369 struct rtllib_hdr_4addrqos *hdr_4addrqos;
370 u8 tid;
371
372 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
373 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
374 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
375 tid = UP2AC(tid);
376 tid++;
377 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
378 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
379 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
380 tid = UP2AC(tid);
381 tid++;
382 } else {
383 tid = 0;
384 }
385
386 switch (ieee->iw_mode) {
387 case IW_MODE_ADHOC:
388 {
389 struct list_head *p;
390 struct ieee_ibss_seq *entry = NULL;
391 u8 *mac = header->addr2;
392 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
393 list_for_each(p, &ieee->ibss_mac_hash[index]) {
394 entry = list_entry(p, struct ieee_ibss_seq, list);
395 if (!memcmp(entry->mac, mac, ETH_ALEN))
396 break;
397 }
398 if (p == &ieee->ibss_mac_hash[index]) {
399 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
400 if (!entry) {
401 printk(KERN_WARNING "Cannot malloc new mac entry\n");
402 return 0;
403 }
404 memcpy(entry->mac, mac, ETH_ALEN);
405 entry->seq_num[tid] = seq;
406 entry->frag_num[tid] = frag;
407 entry->packet_time[tid] = jiffies;
408 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
409 return 0;
410 }
411 last_seq = &entry->seq_num[tid];
412 last_frag = &entry->frag_num[tid];
413 last_time = &entry->packet_time[tid];
414 break;
415 }
416
417 case IW_MODE_INFRA:
418 last_seq = &ieee->last_rxseq_num[tid];
419 last_frag = &ieee->last_rxfrag_num[tid];
420 last_time = &ieee->last_packet_time[tid];
421 break;
422 default:
423 return 0;
424 }
425
426 if ((*last_seq == seq) &&
427 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
428 if (*last_frag == frag)
429 goto drop;
430 if (*last_frag + 1 != frag)
431 /* out-of-order fragment */
432 goto drop;
433 } else
434 *last_seq = seq;
435
436 *last_frag = frag;
437 *last_time = jiffies;
438 return 0;
439
440 drop:
441
442 return 1;
443 }
444
445 static bool AddReorderEntry(struct rx_ts_record *pTS,
446 struct rx_reorder_entry *pReorderEntry)
447 {
448 struct list_head *pList = &pTS->RxPendingPktList;
449
450 while (pList->next != &pTS->RxPendingPktList) {
451 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
452 list_entry(pList->next, struct rx_reorder_entry,
453 List))->SeqNum))
454 pList = pList->next;
455 else if (SN_EQUAL(pReorderEntry->SeqNum,
456 ((struct rx_reorder_entry *)list_entry(pList->next,
457 struct rx_reorder_entry, List))->SeqNum))
458 return false;
459 else
460 break;
461 }
462 pReorderEntry->List.next = pList->next;
463 pReorderEntry->List.next->prev = &pReorderEntry->List;
464 pReorderEntry->List.prev = pList;
465 pList->next = &pReorderEntry->List;
466
467 return true;
468 }
469
470 void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb **prxbIndicateArray, u8 index)
471 {
472 struct net_device_stats *stats = &ieee->stats;
473 u8 i = 0 , j = 0;
474 u16 ethertype;
475 for (j = 0; j < index; j++) {
476 struct rtllib_rxb *prxb = prxbIndicateArray[j];
477 for (i = 0; i < prxb->nr_subframes; i++) {
478 struct sk_buff *sub_skb = prxb->subframes[i];
479
480 /* convert hdr + possible LLC headers into Ethernet header */
481 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
482 if (sub_skb->len >= 8 &&
483 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
484 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
485 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
486 /* remove RFC1042 or Bridge-Tunnel encapsulation
487 * and replace EtherType */
488 skb_pull(sub_skb, SNAP_SIZE);
489 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
490 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
491 } else {
492 u16 len;
493 /* Leave Ethernet header part of hdr and full payload */
494 len = htons(sub_skb->len);
495 memcpy(skb_push(sub_skb, 2), &len, 2);
496 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
497 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
498 }
499
500 /* Indicat the packets to upper layer */
501 if (sub_skb) {
502 stats->rx_packets++;
503 stats->rx_bytes += sub_skb->len;
504
505 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
506 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
507 sub_skb->dev = ieee->dev;
508 sub_skb->dev->stats.rx_packets++;
509 sub_skb->dev->stats.rx_bytes += sub_skb->len;
510 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
511 ieee->last_rx_ps_time = jiffies;
512 netif_rx(sub_skb);
513 }
514 }
515 kfree(prxb);
516 prxb = NULL;
517 }
518 }
519
520 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, struct rx_ts_record *pTS)
521 {
522 struct rx_reorder_entry *pRxReorderEntry;
523 u8 RfdCnt = 0;
524
525 del_timer_sync(&pTS->RxPktPendingTimer);
526 while (!list_empty(&pTS->RxPendingPktList)) {
527 if (RfdCnt >= REORDER_WIN_SIZE) {
528 printk(KERN_INFO "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", __func__);
529 break;
530 }
531
532 pRxReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev, struct rx_reorder_entry, List);
533 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pRxReorderEntry->SeqNum);
534 list_del_init(&pRxReorderEntry->List);
535
536 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
537
538 RfdCnt = RfdCnt + 1;
539 list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
540 }
541 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
542
543 pTS->RxIndicateSeq = 0xffff;
544 }
545
546 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
547 struct rtllib_rxb *prxb,
548 struct rx_ts_record *pTS, u16 SeqNum)
549 {
550 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
551 struct rx_reorder_entry *pReorderEntry = NULL;
552 u8 WinSize = pHTInfo->RxReorderWinSize;
553 u16 WinEnd = 0;
554 u8 index = 0;
555 bool bMatchWinStart = false, bPktInBuf = false;
556 unsigned long flags;
557
558 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Seq is %d, pTS->RxIndicateSeq"
559 " is %d, WinSize is %d\n", __func__, SeqNum,
560 pTS->RxIndicateSeq, WinSize);
561
562 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
563
564 WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
565 /* Rx Reorder initialize condition.*/
566 if (pTS->RxIndicateSeq == 0xffff)
567 pTS->RxIndicateSeq = SeqNum;
568
569 /* Drop out the packet which SeqNum is smaller than WinStart */
570 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
571 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
572 pTS->RxIndicateSeq, SeqNum);
573 pHTInfo->RxReorderDropCounter++;
574 {
575 int i;
576 for (i = 0; i < prxb->nr_subframes; i++)
577 dev_kfree_skb(prxb->subframes[i]);
578 kfree(prxb);
579 prxb = NULL;
580 }
581 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
582 return;
583 }
584
585 /*
586 * Sliding window manipulation. Conditions includes:
587 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
588 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
589 */
590 if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
591 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
592 bMatchWinStart = true;
593 } else if (SN_LESS(WinEnd, SeqNum)) {
594 if (SeqNum >= (WinSize - 1))
595 pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
596 else
597 pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum + 1)) + 1;
598 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d,"
599 " NewSeq: %d\n", pTS->RxIndicateSeq, SeqNum);
600 }
601
602 /*
603 * Indication process.
604 * After Packet dropping and Sliding Window shifting as above, we can
605 * now just indicate the packets with the SeqNum smaller than latest
606 * WinStart and struct buffer other packets.
607 */
608 /* For Rx Reorder condition:
609 * 1. All packets with SeqNum smaller than WinStart => Indicate
610 * 2. All packets with SeqNum larger than or equal to
611 * WinStart => Buffer it.
612 */
613 if (bMatchWinStart) {
614 /* Current packet is going to be indicated.*/
615 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! "
616 "IndicateSeq: %d, NewSeq: %d\n",
617 pTS->RxIndicateSeq, SeqNum);
618 ieee->prxbIndicateArray[0] = prxb;
619 index = 1;
620 } else {
621 /* Current packet is going to be inserted into pending list.*/
622 if (!list_empty(&ieee->RxReorder_Unused_List)) {
623 pReorderEntry = (struct rx_reorder_entry *)
624 list_entry(ieee->RxReorder_Unused_List.next,
625 struct rx_reorder_entry, List);
626 list_del_init(&pReorderEntry->List);
627
628 /* Make a reorder entry and insert into a the packet list.*/
629 pReorderEntry->SeqNum = SeqNum;
630 pReorderEntry->prxb = prxb;
631
632 if (!AddReorderEntry(pTS, pReorderEntry)) {
633 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
634 "%s(): Duplicate packet is "
635 "dropped!! IndicateSeq: %d, "
636 "NewSeq: %d\n",
637 __func__, pTS->RxIndicateSeq,
638 SeqNum);
639 list_add_tail(&pReorderEntry->List,
640 &ieee->RxReorder_Unused_List); {
641 int i;
642 for (i = 0; i < prxb->nr_subframes; i++)
643 dev_kfree_skb(prxb->subframes[i]);
644 kfree(prxb);
645 prxb = NULL;
646 }
647 } else {
648 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
649 "Pkt insert into struct buffer!! "
650 "IndicateSeq: %d, NewSeq: %d\n",
651 pTS->RxIndicateSeq, SeqNum);
652 }
653 } else {
654 /*
655 * Packets are dropped if there are not enough reorder
656 * entries. This part should be modified!! We can just
657 * indicate all the packets in struct buffer and get
658 * reorder entries.
659 */
660 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
661 " There is no reorder entry!! Packet is "
662 "dropped!!\n");
663 {
664 int i;
665 for (i = 0; i < prxb->nr_subframes; i++)
666 dev_kfree_skb(prxb->subframes[i]);
667 kfree(prxb);
668 prxb = NULL;
669 }
670 }
671 }
672
673 /* Check if there is any packet need indicate.*/
674 while (!list_empty(&pTS->RxPendingPktList)) {
675 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
676
677 pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,
678 struct rx_reorder_entry, List);
679 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
680 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
681 /* This protect struct buffer from overflow. */
682 if (index >= REORDER_WIN_SIZE) {
683 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicate"
684 "Packet(): Buffer overflow!!\n");
685 bPktInBuf = true;
686 break;
687 }
688
689 list_del_init(&pReorderEntry->List);
690
691 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
692 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
693
694 ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
695 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum"
696 " %d!\n", __func__, pReorderEntry->SeqNum);
697 index++;
698
699 list_add_tail(&pReorderEntry->List,
700 &ieee->RxReorder_Unused_List);
701 } else {
702 bPktInBuf = true;
703 break;
704 }
705 }
706
707 /* Handling pending timer. Set this timer to prevent from long time
708 * Rx buffering.*/
709 if (index > 0) {
710 if (timer_pending(&pTS->RxPktPendingTimer))
711 del_timer_sync(&pTS->RxPktPendingTimer);
712 pTS->RxTimeoutIndicateSeq = 0xffff;
713
714 if (index > REORDER_WIN_SIZE) {
715 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
716 " Rx Reorer struct buffer full!!\n");
717 spin_unlock_irqrestore(&(ieee->reorder_spinlock),
718 flags);
719 return;
720 }
721 rtllib_indicate_packets(ieee, 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",
727 __func__);
728 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
729 mod_timer(&pTS->RxPktPendingTimer, jiffies +
730 MSECS(pHTInfo->RxReorderPendingTime));
731 }
732 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
733 }
734
735 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
736 struct rtllib_rx_stats *rx_stats,
737 struct rtllib_rxb *rxb, u8 *src, u8 *dst)
738 {
739 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
740 u16 fc = le16_to_cpu(hdr->frame_ctl);
741
742 u16 LLCOffset = sizeof(struct rtllib_hdr_3addr);
743 u16 ChkLength;
744 bool bIsAggregateFrame = false;
745 u16 nSubframe_Length;
746 u8 nPadding_Length = 0;
747 u16 SeqNum = 0;
748 struct sk_buff *sub_skb;
749 u8 *data_ptr;
750 /* just for debug purpose */
751 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
752 if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
753 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
754 bIsAggregateFrame = true;
755
756 if (RTLLIB_QOS_HAS_SEQ(fc))
757 LLCOffset += 2;
758 if (rx_stats->bContainHTC)
759 LLCOffset += sHTCLng;
760
761 ChkLength = LLCOffset;
762
763 if (skb->len <= ChkLength)
764 return 0;
765
766 skb_pull(skb, LLCOffset);
767 ieee->bIsAggregateFrame = bIsAggregateFrame;
768 if (!bIsAggregateFrame) {
769 rxb->nr_subframes = 1;
770
771 /* altered by clark 3/30/2010
772 * The struct buffer size of the skb indicated to upper layer
773 * must be less than 5000, or the defraged IP datagram
774 * in the IP layer will exceed "ipfrag_high_tresh" and be
775 * discarded. so there must not use the function
776 * "skb_copy" and "skb_clone" for "skb".
777 */
778
779 /* Allocate new skb for releasing to upper layer */
780 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
781 skb_reserve(sub_skb, 12);
782 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
783 memcpy(data_ptr, skb->data, skb->len);
784 sub_skb->dev = ieee->dev;
785
786 rxb->subframes[0] = sub_skb;
787
788 memcpy(rxb->src, src, ETH_ALEN);
789 memcpy(rxb->dst, dst, ETH_ALEN);
790 rxb->subframes[0]->dev = ieee->dev;
791 return 1;
792 } else {
793 rxb->nr_subframes = 0;
794 memcpy(rxb->src, src, ETH_ALEN);
795 memcpy(rxb->dst, dst, ETH_ALEN);
796 while (skb->len > ETHERNET_HEADER_SIZE) {
797 /* Offset 12 denote 2 mac address */
798 nSubframe_Length = *((u16 *)(skb->data + 12));
799 nSubframe_Length = (nSubframe_Length >> 8) +
800 (nSubframe_Length << 8);
801
802 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
803 printk(KERN_INFO "%s: A-MSDU parse error!! "
804 "pRfd->nTotalSubframe : %d\n",\
805 __func__, rxb->nr_subframes);
806 printk(KERN_INFO "%s: A-MSDU parse error!! "
807 "Subframe Length: %d\n", __func__,
808 nSubframe_Length);
809 printk(KERN_INFO "nRemain_Length is %d and "
810 "nSubframe_Length is : %d\n", skb->len,
811 nSubframe_Length);
812 printk(KERN_INFO "The Packet SeqNum is %d\n", SeqNum);
813 return 0;
814 }
815
816 /* move the data point to data content */
817 skb_pull(skb, ETHERNET_HEADER_SIZE);
818
819 /* altered by clark 3/30/2010
820 * The struct buffer size of the skb indicated to upper layer
821 * must be less than 5000, or the defraged IP datagram
822 * in the IP layer will exceed "ipfrag_high_tresh" and be
823 * discarded. so there must not use the function
824 * "skb_copy" and "skb_clone" for "skb".
825 */
826
827 /* Allocate new skb for releasing to upper layer */
828 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
829 skb_reserve(sub_skb, 12);
830 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
831 memcpy(data_ptr, skb->data, nSubframe_Length);
832
833 sub_skb->dev = ieee->dev;
834 rxb->subframes[rxb->nr_subframes++] = sub_skb;
835 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
836 RTLLIB_DEBUG_RX("ParseSubframe(): Too many "
837 "Subframes! Packets dropped!\n");
838 break;
839 }
840 skb_pull(skb, nSubframe_Length);
841
842 if (skb->len != 0) {
843 nPadding_Length = 4 - ((nSubframe_Length +
844 ETHERNET_HEADER_SIZE) % 4);
845 if (nPadding_Length == 4)
846 nPadding_Length = 0;
847
848 if (skb->len < nPadding_Length)
849 return 0;
850
851 skb_pull(skb, nPadding_Length);
852 }
853 }
854
855 return rxb->nr_subframes;
856 }
857 }
858
859
860 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
861 struct sk_buff *skb,
862 struct rtllib_rx_stats *rx_stats)
863 {
864 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
865 u16 fc = le16_to_cpu(hdr->frame_ctl);
866 size_t hdrlen = 0;
867
868 hdrlen = rtllib_get_hdrlen(fc);
869 if (HTCCheck(ieee, skb->data)) {
870 if (net_ratelimit())
871 printk(KERN_INFO "%s: find HTCControl!\n", __func__);
872 hdrlen += 4;
873 rx_stats->bContainHTC = 1;
874 }
875
876 if (RTLLIB_QOS_HAS_SEQ(fc))
877 rx_stats->bIsQosData = 1;
878
879 return hdrlen;
880 }
881
882 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
883 struct sk_buff *skb, u8 multicast)
884 {
885 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
886 u16 fc, sc;
887 u8 frag, type, stype;
888
889 fc = le16_to_cpu(hdr->frame_ctl);
890 type = WLAN_FC_GET_TYPE(fc);
891 stype = WLAN_FC_GET_STYPE(fc);
892 sc = le16_to_cpu(hdr->seq_ctl);
893 frag = WLAN_GET_SEQ_FRAG(sc);
894
895 if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
896 !ieee->current_network.qos_data.active ||
897 !IsDataFrame(skb->data) ||
898 IsLegacyDataFrame(skb->data)) {
899 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))) {
900 if (is_duplicate_packet(ieee, hdr))
901 return -1;
902 }
903 } else {
904 struct rx_ts_record *pRxTS = NULL;
905 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
906 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
907 if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
908 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) {
909 return -1;
910 } else {
911 pRxTS->RxLastFragNum = frag;
912 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
913 }
914 } else {
915 RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip"
916 " the check!!\n", __func__);
917 return -1;
918 }
919 }
920
921 return 0;
922 }
923
924 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
925 struct rtllib_hdr_4addr *hdr, u8 *dst,
926 u8 *src, u8 *bssid)
927 {
928 u16 fc = le16_to_cpu(hdr->frame_ctl);
929
930 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
931 case RTLLIB_FCTL_FROMDS:
932 memcpy(dst, hdr->addr1, ETH_ALEN);
933 memcpy(src, hdr->addr3, ETH_ALEN);
934 memcpy(bssid, hdr->addr2, ETH_ALEN);
935 break;
936 case RTLLIB_FCTL_TODS:
937 memcpy(dst, hdr->addr3, ETH_ALEN);
938 memcpy(src, hdr->addr2, ETH_ALEN);
939 memcpy(bssid, hdr->addr1, ETH_ALEN);
940 break;
941 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
942 memcpy(dst, hdr->addr3, ETH_ALEN);
943 memcpy(src, hdr->addr4, ETH_ALEN);
944 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
945 break;
946 case 0:
947 memcpy(dst, hdr->addr1, ETH_ALEN);
948 memcpy(src, hdr->addr2, ETH_ALEN);
949 memcpy(bssid, hdr->addr3, ETH_ALEN);
950 break;
951 }
952 }
953
954 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
955 u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
956 {
957 u8 zero_addr[ETH_ALEN] = {0};
958 u8 type, stype;
959
960 type = WLAN_FC_GET_TYPE(fc);
961 stype = WLAN_FC_GET_STYPE(fc);
962
963 /* Filter frames from different BSS */
964 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS)
965 && (compare_ether_addr(ieee->current_network.bssid, bssid) != 0)
966 && memcmp(ieee->current_network.bssid, zero_addr, ETH_ALEN)) {
967 return -1;
968 }
969
970 /* Filter packets sent by an STA that will be forwarded by AP */
971 if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
972 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
973 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
974 (compare_ether_addr(dst, ieee->current_network.bssid) != 0) &&
975 (compare_ether_addr(bssid, ieee->current_network.bssid) == 0)) {
976 return -1;
977 }
978 }
979
980 /* Nullfunc frames may have PS-bit set, so they must be passed to
981 * hostap_handle_sta_rx() before being dropped here. */
982 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
983 if (stype != RTLLIB_STYPE_DATA &&
984 stype != RTLLIB_STYPE_DATA_CFACK &&
985 stype != RTLLIB_STYPE_DATA_CFPOLL &&
986 stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
987 stype != RTLLIB_STYPE_QOS_DATA) {
988 if (stype != RTLLIB_STYPE_NULLFUNC)
989 RTLLIB_DEBUG_DROP(
990 "RX: dropped data frame "
991 "with no data (type=0x%02x, "
992 "subtype=0x%02x)\n",
993 type, stype);
994 return -1;
995 }
996 }
997
998 if (ieee->iw_mode != IW_MODE_MESH) {
999 /* packets from our adapter are dropped (echo) */
1000 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1001 return -1;
1002
1003 /* {broad,multi}cast packets to our BSS go through */
1004 if (is_multicast_ether_addr(dst) || is_broadcast_ether_addr(dst)) {
1005 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1006 return -1;
1007 }
1008 }
1009 return 0;
1010 }
1011
1012 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1013 struct rtllib_crypt_data **crypt, size_t hdrlen)
1014 {
1015 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1016 u16 fc = le16_to_cpu(hdr->frame_ctl);
1017 int idx = 0;
1018
1019 if (ieee->host_decrypt) {
1020 if (skb->len >= hdrlen + 3)
1021 idx = skb->data[hdrlen + 3] >> 6;
1022
1023 *crypt = ieee->crypt[idx];
1024 /* allow NULL decrypt to indicate an station specific override
1025 * for default encryption */
1026 if (*crypt && ((*crypt)->ops == NULL ||
1027 (*crypt)->ops->decrypt_mpdu == NULL))
1028 *crypt = NULL;
1029
1030 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1031 /* This seems to be triggered by some (multicast?)
1032 * frames from other than current BSS, so just drop the
1033 * frames silently instead of filling system log with
1034 * these reports. */
1035 RTLLIB_DEBUG_DROP("Decryption failed (not set)"
1036 " (SA= %pM)\n",
1037 hdr->addr2);
1038 ieee->ieee_stats.rx_discards_undecryptable++;
1039 return -1;
1040 }
1041 }
1042
1043 return 0;
1044 }
1045
1046 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1047 struct rtllib_rx_stats *rx_stats,
1048 struct rtllib_crypt_data *crypt, size_t hdrlen)
1049 {
1050 struct rtllib_hdr_4addr *hdr;
1051 int keyidx = 0;
1052 u16 fc, sc;
1053 u8 frag;
1054
1055 hdr = (struct rtllib_hdr_4addr *)skb->data;
1056 fc = le16_to_cpu(hdr->frame_ctl);
1057 sc = le16_to_cpu(hdr->seq_ctl);
1058 frag = WLAN_GET_SEQ_FRAG(sc);
1059
1060 if ((!rx_stats->Decrypted))
1061 ieee->need_sw_enc = 1;
1062 else
1063 ieee->need_sw_enc = 0;
1064
1065 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1066 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1067 printk(KERN_INFO "%s: decrypt frame error\n", __func__);
1068 return -1;
1069 }
1070
1071 hdr = (struct rtllib_hdr_4addr *) skb->data;
1072 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1073 int flen;
1074 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1075 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1076
1077 if (!frag_skb) {
1078 RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1079 "Rx cannot get skb from fragment "
1080 "cache (morefrag=%d seq=%u frag=%u)\n",
1081 (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1082 WLAN_GET_SEQ_SEQ(sc), frag);
1083 return -1;
1084 }
1085 flen = skb->len;
1086 if (frag != 0)
1087 flen -= hdrlen;
1088
1089 if (frag_skb->tail + flen > frag_skb->end) {
1090 printk(KERN_WARNING "%s: host decrypted and "
1091 "reassembled frame did not fit skb\n",
1092 __func__);
1093 rtllib_frag_cache_invalidate(ieee, hdr);
1094 return -1;
1095 }
1096
1097 if (frag == 0) {
1098 /* copy first fragment (including full headers) into
1099 * beginning of the fragment cache skb */
1100 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1101 } else {
1102 /* append frame payload to the end of the fragment
1103 * cache skb */
1104 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1105 flen);
1106 }
1107 dev_kfree_skb_any(skb);
1108 skb = NULL;
1109
1110 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1111 /* more fragments expected - leave the skb in fragment
1112 * cache for now; it will be delivered to upper layers
1113 * after all fragments have been received */
1114 return -2;
1115 }
1116
1117 /* this was the last fragment and the frame will be
1118 * delivered, so remove skb from fragment cache */
1119 skb = frag_skb;
1120 hdr = (struct rtllib_hdr_4addr *) skb->data;
1121 rtllib_frag_cache_invalidate(ieee, hdr);
1122 }
1123
1124 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1125 * encrypted/authenticated */
1126 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1127 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1128 printk(KERN_INFO "%s: ==>decrypt msdu error\n", __func__);
1129 return -1;
1130 }
1131
1132 hdr = (struct rtllib_hdr_4addr *) skb->data;
1133 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1134 if (/*ieee->ieee802_1x &&*/
1135 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1136
1137 /* pass unencrypted EAPOL frames even if encryption is
1138 * configured */
1139 struct eapol *eap = (struct eapol *)(skb->data +
1140 24);
1141 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1142 eap_get_type(eap->type));
1143 } else {
1144 RTLLIB_DEBUG_DROP(
1145 "encryption configured, but RX "
1146 "frame not encrypted (SA= %pM)\n",
1147 hdr->addr2);
1148 return -1;
1149 }
1150 }
1151
1152 if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1153 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1154 struct eapol *eap = (struct eapol *)(skb->data +
1155 24);
1156 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1157 eap_get_type(eap->type));
1158 }
1159
1160 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1161 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1162 RTLLIB_DEBUG_DROP(
1163 "dropped unencrypted RX data "
1164 "frame from %pM"
1165 " (drop_unencrypted=1)\n",
1166 hdr->addr2);
1167 return -1;
1168 }
1169
1170 if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1171 printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n");
1172
1173 return 0;
1174 }
1175
1176 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
1177 {
1178 if (unicast) {
1179
1180 if ((ieee->state == RTLLIB_LINKED)) {
1181 if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1182 ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1183 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1184 if (ieee->LeisurePSLeave)
1185 ieee->LeisurePSLeave(ieee->dev);
1186 }
1187 }
1188 }
1189 ieee->last_rx_ps_time = jiffies;
1190 }
1191
1192 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1193 struct rtllib_rx_stats *rx_stats,
1194 struct rtllib_rxb *rxb,
1195 u8 *dst,
1196 u8 *src)
1197 {
1198 struct net_device *dev = ieee->dev;
1199 u16 ethertype;
1200 int i = 0;
1201
1202 if (rxb == NULL) {
1203 printk(KERN_INFO "%s: rxb is NULL!!\n", __func__);
1204 return ;
1205 }
1206
1207 for (i = 0; i < rxb->nr_subframes; i++) {
1208 struct sk_buff *sub_skb = rxb->subframes[i];
1209
1210 if (sub_skb) {
1211 /* convert hdr + possible LLC headers into Ethernet header */
1212 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1213 if (sub_skb->len >= 8 &&
1214 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1215 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1216 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1217 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1218 * replace EtherType */
1219 skb_pull(sub_skb, SNAP_SIZE);
1220 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1221 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1222 } else {
1223 u16 len;
1224 /* Leave Ethernet header part of hdr and full payload */
1225 len = htons(sub_skb->len);
1226 memcpy(skb_push(sub_skb, 2), &len, 2);
1227 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1228 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1229 }
1230
1231 ieee->stats.rx_packets++;
1232 ieee->stats.rx_bytes += sub_skb->len;
1233
1234 if (is_multicast_ether_addr(dst))
1235 ieee->stats.multicast++;
1236
1237 /* Indicat the packets to upper layer */
1238 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1239 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1240 sub_skb->dev = dev;
1241 sub_skb->dev->stats.rx_packets++;
1242 sub_skb->dev->stats.rx_bytes += sub_skb->len;
1243 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1244 netif_rx(sub_skb);
1245 }
1246 }
1247 kfree(rxb);
1248 rxb = NULL;
1249 }
1250
1251 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1252 struct rtllib_rx_stats *rx_stats)
1253 {
1254 struct net_device *dev = ieee->dev;
1255 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1256 struct rtllib_crypt_data *crypt = NULL;
1257 struct rtllib_rxb *rxb = NULL;
1258 struct rx_ts_record *pTS = NULL;
1259 u16 fc, sc, SeqNum = 0;
1260 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1261 u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
1262 size_t hdrlen = 0;
1263 bool bToOtherSTA = false;
1264 int ret = 0, i = 0;
1265
1266 hdr = (struct rtllib_hdr_4addr *)skb->data;
1267 fc = le16_to_cpu(hdr->frame_ctl);
1268 type = WLAN_FC_GET_TYPE(fc);
1269 stype = WLAN_FC_GET_STYPE(fc);
1270 sc = le16_to_cpu(hdr->seq_ctl);
1271
1272 /*Filter pkt not to me*/
1273 multicast = is_multicast_ether_addr(hdr->addr1)|is_broadcast_ether_addr(hdr->addr1);
1274 unicast = !multicast;
1275 if (unicast && (compare_ether_addr(dev->dev_addr, hdr->addr1) != 0)) {
1276 if (ieee->bNetPromiscuousMode)
1277 bToOtherSTA = true;
1278 else
1279 goto rx_dropped;
1280 }
1281
1282 /*Filter pkt has too small length */
1283 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1284 if (skb->len < hdrlen) {
1285 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1286 goto rx_dropped;
1287 }
1288
1289 /* Filter Duplicate pkt */
1290 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1291 if (ret < 0)
1292 goto rx_dropped;
1293
1294 /* Filter CTRL Frame */
1295 if (type == RTLLIB_FTYPE_CTL)
1296 goto rx_dropped;
1297
1298 /* Filter MGNT Frame */
1299 if (type == RTLLIB_FTYPE_MGMT) {
1300 if (bToOtherSTA)
1301 goto rx_dropped;
1302 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1303 goto rx_dropped;
1304 else
1305 goto rx_exit;
1306 }
1307
1308 /* Filter WAPI DATA Frame */
1309
1310 /* Update statstics for AP roaming */
1311 if (!bToOtherSTA) {
1312 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1313 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1314 }
1315 dev->last_rx = jiffies;
1316
1317 /* Data frame - extract src/dst addresses */
1318 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1319
1320 /* Filter Data frames */
1321 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1322 if (ret < 0)
1323 goto rx_dropped;
1324
1325 if (skb->len == hdrlen)
1326 goto rx_dropped;
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 TID = Frame_QoSTID(skb->data);
1357 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1358 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, RX_DIR, true);
1359 if (TID != 0 && TID != 3)
1360 ieee->bis_any_nonbepkts = true;
1361 }
1362
1363 /* Parse rx data frame (For AMSDU) */
1364 /* skb: hdr + (possible reassembled) full plaintext payload */
1365 payload = skb->data + hdrlen;
1366 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1367 if (rxb == NULL) {
1368 RTLLIB_DEBUG(RTLLIB_DL_ERR,
1369 "%s(): kmalloc rxb error\n", __func__);
1370 goto rx_dropped;
1371 }
1372 /* to parse amsdu packets */
1373 /* qos data packets & reserved bit is 1 */
1374 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1375 /* only to free rxb, and not submit the packets to upper layer */
1376 for (i = 0; i < rxb->nr_subframes; i++)
1377 dev_kfree_skb(rxb->subframes[i]);
1378 kfree(rxb);
1379 rxb = NULL;
1380 goto rx_dropped;
1381 }
1382
1383 /* Update WAPI PN */
1384
1385 /* Check if leave LPS */
1386 if (!bToOtherSTA) {
1387 if (ieee->bIsAggregateFrame)
1388 nr_subframes = rxb->nr_subframes;
1389 else
1390 nr_subframes = 1;
1391 if (unicast)
1392 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1393 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1394 }
1395
1396 /* Indicate packets to upper layer or Rx Reorder */
1397 if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || bToOtherSTA)
1398 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1399 else
1400 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1401
1402 dev_kfree_skb(skb);
1403
1404 rx_exit:
1405 return 1;
1406
1407 rx_dropped:
1408 if (rxb != NULL) {
1409 kfree(rxb);
1410 rxb = NULL;
1411 }
1412 ieee->stats.rx_dropped++;
1413
1414 /* Returning 0 indicates to caller that we have not handled the SKB--
1415 * so it is still allocated and can be used again by underlying
1416 * hardware as a DMA target */
1417 return 0;
1418 }
1419
1420 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1421 struct rtllib_rx_stats *rx_stats)
1422 {
1423 return 0;
1424 }
1425
1426 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1427 struct rtllib_rx_stats *rx_stats)
1428 {
1429 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1430 u16 fc = le16_to_cpu(hdr->frame_ctl);
1431 size_t hdrlen = rtllib_get_hdrlen(fc);
1432
1433 if (skb->len < hdrlen) {
1434 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1435 return 0;
1436 }
1437
1438 if (HTCCheck(ieee, skb->data)) {
1439 if (net_ratelimit())
1440 printk(KERN_INFO "%s: Find HTCControl!\n", __func__);
1441 hdrlen += 4;
1442 }
1443
1444 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1445 ieee->stats.rx_packets++;
1446 ieee->stats.rx_bytes += skb->len;
1447
1448 return 1;
1449 }
1450
1451 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1452 struct rtllib_rx_stats *rx_stats)
1453 {
1454 return 0;
1455 }
1456
1457 /* All received frames are sent to this function. @skb contains the frame in
1458 * IEEE 802.11 format, i.e., in the format it was sent over air.
1459 * This function is called only as a tasklet (software IRQ). */
1460 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1461 struct rtllib_rx_stats *rx_stats)
1462 {
1463 int ret = 0;
1464
1465 if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1466 printk(KERN_INFO "%s: Input parameters NULL!\n", __func__);
1467 goto rx_dropped;
1468 }
1469 if (skb->len < 10) {
1470 printk(KERN_INFO "%s: SKB length < 10\n", __func__);
1471 goto rx_dropped;
1472 }
1473
1474 switch (ieee->iw_mode) {
1475 case IW_MODE_ADHOC:
1476 case IW_MODE_INFRA:
1477 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1478 break;
1479 case IW_MODE_MASTER:
1480 case IW_MODE_REPEAT:
1481 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1482 break;
1483 case IW_MODE_MONITOR:
1484 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1485 break;
1486 case IW_MODE_MESH:
1487 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1488 break;
1489 default:
1490 printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__);
1491 break;
1492 }
1493
1494 return ret;
1495
1496 rx_dropped:
1497 ieee->stats.rx_dropped++;
1498 return 0;
1499 }
1500
1501 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1502
1503 /*
1504 * Make ther structure we read from the beacon packet has
1505 * the right values
1506 */
1507 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1508 *info_element, int sub_type)
1509 {
1510
1511 if (info_element->qui_subtype != sub_type)
1512 return -1;
1513 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1514 return -1;
1515 if (info_element->qui_type != QOS_OUI_TYPE)
1516 return -1;
1517 if (info_element->version != QOS_VERSION_1)
1518 return -1;
1519
1520 return 0;
1521 }
1522
1523
1524 /*
1525 * Parse a QoS parameter element
1526 */
1527 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1528 *element_param, struct rtllib_info_element
1529 *info_element)
1530 {
1531 int ret = 0;
1532 u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1533
1534 if ((info_element == NULL) || (element_param == NULL))
1535 return -1;
1536
1537 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1538 memcpy(element_param->info_element.qui, info_element->data,
1539 info_element->len);
1540 element_param->info_element.elementID = info_element->id;
1541 element_param->info_element.length = info_element->len;
1542 } else
1543 ret = -1;
1544 if (ret == 0)
1545 ret = rtllib_verify_qos_info(&element_param->info_element,
1546 QOS_OUI_PARAM_SUB_TYPE);
1547 return ret;
1548 }
1549
1550 /*
1551 * Parse a QoS information element
1552 */
1553 static int rtllib_read_qos_info_element(struct
1554 rtllib_qos_information_element
1555 *element_info, struct rtllib_info_element
1556 *info_element)
1557 {
1558 int ret = 0;
1559 u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1560
1561 if (element_info == NULL)
1562 return -1;
1563 if (info_element == NULL)
1564 return -1;
1565
1566 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1567 memcpy(element_info->qui, info_element->data,
1568 info_element->len);
1569 element_info->elementID = info_element->id;
1570 element_info->length = info_element->len;
1571 } else
1572 ret = -1;
1573
1574 if (ret == 0)
1575 ret = rtllib_verify_qos_info(element_info,
1576 QOS_OUI_INFO_SUB_TYPE);
1577 return ret;
1578 }
1579
1580
1581 /*
1582 * Write QoS parameters from the ac parameters.
1583 */
1584 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1585 struct rtllib_qos_data *qos_data)
1586 {
1587 struct rtllib_qos_ac_parameter *ac_params;
1588 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1589 int rc = 0;
1590 int i;
1591 u8 aci;
1592 u8 acm;
1593
1594 qos_data->wmm_acm = 0;
1595 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1596 ac_params = &(param_elm->ac_params_record[i]);
1597
1598 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1599 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1600
1601 if (aci >= QOS_QUEUE_NUM)
1602 continue;
1603 switch (aci) {
1604 case 1:
1605 /* BIT(0) | BIT(3) */
1606 if (acm)
1607 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1608 break;
1609 case 2:
1610 /* BIT(4) | BIT(5) */
1611 if (acm)
1612 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1613 break;
1614 case 3:
1615 /* BIT(6) | BIT(7) */
1616 if (acm)
1617 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1618 break;
1619 case 0:
1620 default:
1621 /* BIT(1) | BIT(2) */
1622 if (acm)
1623 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1624 break;
1625 }
1626
1627 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1628
1629 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1630 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1631
1632 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1633
1634 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1635
1636 qos_param->flag[aci] =
1637 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1638 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1639 }
1640 return rc;
1641 }
1642
1643 /*
1644 * we have a generic data element which it may contain QoS information or
1645 * parameters element. check the information element length to decide
1646 * which type to read
1647 */
1648 static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
1649 *info_element,
1650 struct rtllib_network *network)
1651 {
1652 int rc = 0;
1653 struct rtllib_qos_information_element qos_info_element;
1654
1655 rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1656
1657 if (rc == 0) {
1658 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1659 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1660 } else {
1661 struct rtllib_qos_parameter_info param_element;
1662
1663 rc = rtllib_read_qos_param_element(&param_element,
1664 info_element);
1665 if (rc == 0) {
1666 rtllib_qos_convert_ac_to_parameters(&param_element,
1667 &(network->qos_data));
1668 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1669 network->qos_data.param_count =
1670 param_element.info_element.ac_info & 0x0F;
1671 }
1672 }
1673
1674 if (rc == 0) {
1675 RTLLIB_DEBUG_QOS("QoS is supported\n");
1676 network->qos_data.supported = 1;
1677 }
1678 return rc;
1679 }
1680
1681 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1682
1683 static const char *get_info_element_string(u16 id)
1684 {
1685 switch (id) {
1686 MFIE_STRING(SSID);
1687 MFIE_STRING(RATES);
1688 MFIE_STRING(FH_SET);
1689 MFIE_STRING(DS_SET);
1690 MFIE_STRING(CF_SET);
1691 MFIE_STRING(TIM);
1692 MFIE_STRING(IBSS_SET);
1693 MFIE_STRING(COUNTRY);
1694 MFIE_STRING(HOP_PARAMS);
1695 MFIE_STRING(HOP_TABLE);
1696 MFIE_STRING(REQUEST);
1697 MFIE_STRING(CHALLENGE);
1698 MFIE_STRING(POWER_CONSTRAINT);
1699 MFIE_STRING(POWER_CAPABILITY);
1700 MFIE_STRING(TPC_REQUEST);
1701 MFIE_STRING(TPC_REPORT);
1702 MFIE_STRING(SUPP_CHANNELS);
1703 MFIE_STRING(CSA);
1704 MFIE_STRING(MEASURE_REQUEST);
1705 MFIE_STRING(MEASURE_REPORT);
1706 MFIE_STRING(QUIET);
1707 MFIE_STRING(IBSS_DFS);
1708 MFIE_STRING(RSN);
1709 MFIE_STRING(RATES_EX);
1710 MFIE_STRING(GENERIC);
1711 MFIE_STRING(QOS_PARAMETER);
1712 default:
1713 return "UNKNOWN";
1714 }
1715 }
1716
1717 static inline void rtllib_extract_country_ie(
1718 struct rtllib_device *ieee,
1719 struct rtllib_info_element *info_element,
1720 struct rtllib_network *network,
1721 u8 *addr2)
1722 {
1723 if (IS_DOT11D_ENABLE(ieee)) {
1724 if (info_element->len != 0) {
1725 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1726 network->CountryIeLen = info_element->len;
1727
1728 if (!IS_COUNTRY_IE_VALID(ieee)) {
1729 if ((rtllib_act_scanning(ieee, false) == true) && (ieee->FirstIe_InScan == 1))
1730 printk(KERN_INFO "Received beacon ContryIE, SSID: <%s>\n", network->ssid);
1731 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1732 }
1733 }
1734
1735 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1736 UPDATE_CIE_WATCHDOG(ieee);
1737 }
1738
1739 }
1740
1741 int rtllib_parse_info_param(struct rtllib_device *ieee,
1742 struct rtllib_info_element *info_element,
1743 u16 length,
1744 struct rtllib_network *network,
1745 struct rtllib_rx_stats *stats)
1746 {
1747 u8 i;
1748 short offset;
1749 u16 tmp_htcap_len = 0;
1750 u16 tmp_htinfo_len = 0;
1751 u16 ht_realtek_agg_len = 0;
1752 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1753 char rates_str[64];
1754 char *p;
1755
1756 while (length >= sizeof(*info_element)) {
1757 if (sizeof(*info_element) + info_element->len > length) {
1758 RTLLIB_DEBUG_MGMT("Info elem: parse failed: "
1759 "info_element->len + 2 > left : "
1760 "info_element->len+2=%zd left=%d, id=%d.\n",
1761 info_element->len +
1762 sizeof(*info_element),
1763 length, info_element->id);
1764 /* We stop processing but don't return an error here
1765 * because some misbehaviour APs break this rule. ie.
1766 * Orinoco AP1000. */
1767 break;
1768 }
1769
1770 switch (info_element->id) {
1771 case MFIE_TYPE_SSID:
1772 if (rtllib_is_empty_essid(info_element->data,
1773 info_element->len)) {
1774 network->flags |= NETWORK_EMPTY_ESSID;
1775 break;
1776 }
1777
1778 network->ssid_len = min(info_element->len,
1779 (u8) IW_ESSID_MAX_SIZE);
1780 memcpy(network->ssid, info_element->data, network->ssid_len);
1781 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1782 memset(network->ssid + network->ssid_len, 0,
1783 IW_ESSID_MAX_SIZE - network->ssid_len);
1784
1785 RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1786 network->ssid, network->ssid_len);
1787 break;
1788
1789 case MFIE_TYPE_RATES:
1790 p = rates_str;
1791 network->rates_len = min(info_element->len,
1792 MAX_RATES_LENGTH);
1793 for (i = 0; i < network->rates_len; i++) {
1794 network->rates[i] = info_element->data[i];
1795 p += snprintf(p, sizeof(rates_str) -
1796 (p - rates_str), "%02X ",
1797 network->rates[i]);
1798 if (rtllib_is_ofdm_rate
1799 (info_element->data[i])) {
1800 network->flags |= NETWORK_HAS_OFDM;
1801 if (info_element->data[i] &
1802 RTLLIB_BASIC_RATE_MASK)
1803 network->flags &=
1804 ~NETWORK_HAS_CCK;
1805 }
1806
1807 if (rtllib_is_cck_rate
1808 (info_element->data[i])) {
1809 network->flags |= NETWORK_HAS_CCK;
1810 }
1811 }
1812
1813 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1814 rates_str, network->rates_len);
1815 break;
1816
1817 case MFIE_TYPE_RATES_EX:
1818 p = rates_str;
1819 network->rates_ex_len = min(info_element->len,
1820 MAX_RATES_EX_LENGTH);
1821 for (i = 0; i < network->rates_ex_len; i++) {
1822 network->rates_ex[i] = info_element->data[i];
1823 p += snprintf(p, sizeof(rates_str) -
1824 (p - rates_str), "%02X ",
1825 network->rates[i]);
1826 if (rtllib_is_ofdm_rate
1827 (info_element->data[i])) {
1828 network->flags |= NETWORK_HAS_OFDM;
1829 if (info_element->data[i] &
1830 RTLLIB_BASIC_RATE_MASK)
1831 network->flags &=
1832 ~NETWORK_HAS_CCK;
1833 }
1834 }
1835
1836 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1837 rates_str, network->rates_ex_len);
1838 break;
1839
1840 case MFIE_TYPE_DS_SET:
1841 RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1842 info_element->data[0]);
1843 network->channel = info_element->data[0];
1844 break;
1845
1846 case MFIE_TYPE_FH_SET:
1847 RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1848 break;
1849
1850 case MFIE_TYPE_CF_SET:
1851 RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1852 break;
1853
1854 case MFIE_TYPE_TIM:
1855 if (info_element->len < 4)
1856 break;
1857
1858 network->tim.tim_count = info_element->data[0];
1859 network->tim.tim_period = info_element->data[1];
1860
1861 network->dtim_period = info_element->data[1];
1862 if (ieee->state != RTLLIB_LINKED)
1863 break;
1864 network->last_dtim_sta_time = jiffies;
1865
1866 network->dtim_data = RTLLIB_DTIM_VALID;
1867
1868
1869 if (info_element->data[2] & 1)
1870 network->dtim_data |= RTLLIB_DTIM_MBCAST;
1871
1872 offset = (info_element->data[2] >> 1)*2;
1873
1874
1875 if (ieee->assoc_id < 8*offset ||
1876 ieee->assoc_id > 8*(offset + info_element->len - 3))
1877 break;
1878
1879 offset = (ieee->assoc_id / 8) - offset;
1880 if (info_element->data[3 + offset] &
1881 (1 << (ieee->assoc_id % 8)))
1882 network->dtim_data |= RTLLIB_DTIM_UCAST;
1883
1884 network->listen_interval = network->dtim_period;
1885 break;
1886
1887 case MFIE_TYPE_ERP:
1888 network->erp_value = info_element->data[0];
1889 network->flags |= NETWORK_HAS_ERP_VALUE;
1890 RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1891 network->erp_value);
1892 break;
1893 case MFIE_TYPE_IBSS_SET:
1894 network->atim_window = info_element->data[0];
1895 RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1896 network->atim_window);
1897 break;
1898
1899 case MFIE_TYPE_CHALLENGE:
1900 RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1901 break;
1902
1903 case MFIE_TYPE_GENERIC:
1904 RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1905 info_element->len);
1906 if (!rtllib_parse_qos_info_param_IE(info_element,
1907 network))
1908 break;
1909 if (info_element->len >= 4 &&
1910 info_element->data[0] == 0x00 &&
1911 info_element->data[1] == 0x50 &&
1912 info_element->data[2] == 0xf2 &&
1913 info_element->data[3] == 0x01) {
1914 network->wpa_ie_len = min(info_element->len + 2,
1915 MAX_WPA_IE_LEN);
1916 memcpy(network->wpa_ie, info_element,
1917 network->wpa_ie_len);
1918 break;
1919 }
1920 if (info_element->len == 7 &&
1921 info_element->data[0] == 0x00 &&
1922 info_element->data[1] == 0xe0 &&
1923 info_element->data[2] == 0x4c &&
1924 info_element->data[3] == 0x01 &&
1925 info_element->data[4] == 0x02)
1926 network->Turbo_Enable = 1;
1927
1928 if (tmp_htcap_len == 0) {
1929 if (info_element->len >= 4 &&
1930 info_element->data[0] == 0x00 &&
1931 info_element->data[1] == 0x90 &&
1932 info_element->data[2] == 0x4c &&
1933 info_element->data[3] == 0x033) {
1934
1935 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1936 if (tmp_htcap_len != 0) {
1937 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1938 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
1939 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1940 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1941 }
1942 }
1943 if (tmp_htcap_len != 0) {
1944 network->bssht.bdSupportHT = true;
1945 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1946 } else {
1947 network->bssht.bdSupportHT = false;
1948 network->bssht.bdHT1R = false;
1949 }
1950 }
1951
1952
1953 if (tmp_htinfo_len == 0) {
1954 if (info_element->len >= 4 &&
1955 info_element->data[0] == 0x00 &&
1956 info_element->data[1] == 0x90 &&
1957 info_element->data[2] == 0x4c &&
1958 info_element->data[3] == 0x034) {
1959 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1960 if (tmp_htinfo_len != 0) {
1961 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1962 if (tmp_htinfo_len) {
1963 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ?
1964 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1965 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1966 }
1967
1968 }
1969
1970 }
1971 }
1972
1973 if (ieee->aggregation) {
1974 if (network->bssht.bdSupportHT) {
1975 if (info_element->len >= 4 &&
1976 info_element->data[0] == 0x00 &&
1977 info_element->data[1] == 0xe0 &&
1978 info_element->data[2] == 0x4c &&
1979 info_element->data[3] == 0x02) {
1980 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
1981 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1982 }
1983 if (ht_realtek_agg_len >= 5) {
1984 network->realtek_cap_exit = true;
1985 network->bssht.bdRT2RTAggregation = true;
1986
1987 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1988 network->bssht.bdRT2RTLongSlotTime = true;
1989
1990 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1991 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1992 }
1993 }
1994 if (ht_realtek_agg_len >= 5) {
1995 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1996 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1997 }
1998 }
1999
2000 if ((info_element->len >= 3 &&
2001 info_element->data[0] == 0x00 &&
2002 info_element->data[1] == 0x05 &&
2003 info_element->data[2] == 0xb5) ||
2004 (info_element->len >= 3 &&
2005 info_element->data[0] == 0x00 &&
2006 info_element->data[1] == 0x0a &&
2007 info_element->data[2] == 0xf7) ||
2008 (info_element->len >= 3 &&
2009 info_element->data[0] == 0x00 &&
2010 info_element->data[1] == 0x10 &&
2011 info_element->data[2] == 0x18)) {
2012 network->broadcom_cap_exist = true;
2013 }
2014 if (info_element->len >= 3 &&
2015 info_element->data[0] == 0x00 &&
2016 info_element->data[1] == 0x0c &&
2017 info_element->data[2] == 0x43)
2018 network->ralink_cap_exist = true;
2019 if ((info_element->len >= 3 &&
2020 info_element->data[0] == 0x00 &&
2021 info_element->data[1] == 0x03 &&
2022 info_element->data[2] == 0x7f) ||
2023 (info_element->len >= 3 &&
2024 info_element->data[0] == 0x00 &&
2025 info_element->data[1] == 0x13 &&
2026 info_element->data[2] == 0x74))
2027 network->atheros_cap_exist = true;
2028
2029 if ((info_element->len >= 3 &&
2030 info_element->data[0] == 0x00 &&
2031 info_element->data[1] == 0x50 &&
2032 info_element->data[2] == 0x43))
2033 network->marvell_cap_exist = true;
2034 if (info_element->len >= 3 &&
2035 info_element->data[0] == 0x00 &&
2036 info_element->data[1] == 0x40 &&
2037 info_element->data[2] == 0x96)
2038 network->cisco_cap_exist = true;
2039
2040
2041 if (info_element->len >= 3 &&
2042 info_element->data[0] == 0x00 &&
2043 info_element->data[1] == 0x0a &&
2044 info_element->data[2] == 0xf5)
2045 network->airgo_cap_exist = true;
2046
2047 if (info_element->len > 4 &&
2048 info_element->data[0] == 0x00 &&
2049 info_element->data[1] == 0x40 &&
2050 info_element->data[2] == 0x96 &&
2051 info_element->data[3] == 0x01) {
2052 if (info_element->len == 6) {
2053 memcpy(network->CcxRmState, &info_element[4], 2);
2054 if (network->CcxRmState[0] != 0)
2055 network->bCcxRmEnable = true;
2056 else
2057 network->bCcxRmEnable = false;
2058 network->MBssidMask = network->CcxRmState[1] & 0x07;
2059 if (network->MBssidMask != 0) {
2060 network->bMBssidValid = true;
2061 network->MBssidMask = 0xff << (network->MBssidMask);
2062 memcpy(network->MBssid, network->bssid, ETH_ALEN);
2063 network->MBssid[5] &= network->MBssidMask;
2064 } else {
2065 network->bMBssidValid = false;
2066 }
2067 } else {
2068 network->bCcxRmEnable = false;
2069 }
2070 }
2071 if (info_element->len > 4 &&
2072 info_element->data[0] == 0x00 &&
2073 info_element->data[1] == 0x40 &&
2074 info_element->data[2] == 0x96 &&
2075 info_element->data[3] == 0x03) {
2076 if (info_element->len == 5) {
2077 network->bWithCcxVerNum = true;
2078 network->BssCcxVerNumber = info_element->data[4];
2079 } else {
2080 network->bWithCcxVerNum = false;
2081 network->BssCcxVerNumber = 0;
2082 }
2083 }
2084 if (info_element->len > 4 &&
2085 info_element->data[0] == 0x00 &&
2086 info_element->data[1] == 0x50 &&
2087 info_element->data[2] == 0xf2 &&
2088 info_element->data[3] == 0x04) {
2089 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2090 info_element->len);
2091 network->wzc_ie_len = min(info_element->len+2,
2092 MAX_WZC_IE_LEN);
2093 memcpy(network->wzc_ie, info_element,
2094 network->wzc_ie_len);
2095 }
2096 break;
2097
2098 case MFIE_TYPE_RSN:
2099 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2100 info_element->len);
2101 network->rsn_ie_len = min(info_element->len + 2,
2102 MAX_WPA_IE_LEN);
2103 memcpy(network->rsn_ie, info_element,
2104 network->rsn_ie_len);
2105 break;
2106
2107 case MFIE_TYPE_HT_CAP:
2108 RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2109 info_element->len);
2110 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
2111 if (tmp_htcap_len != 0) {
2112 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2113 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
2114 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
2115 memcpy(network->bssht.bdHTCapBuf,
2116 info_element->data,
2117 network->bssht.bdHTCapLen);
2118
2119 network->bssht.bdSupportHT = true;
2120 network->bssht.bdHT1R = ((((struct ht_capab_ele *)
2121 network->bssht.bdHTCapBuf))->MCS[1]) == 0;
2122
2123 network->bssht.bdBandWidth = (enum ht_channel_width)
2124 (((struct ht_capab_ele *)
2125 (network->bssht.bdHTCapBuf))->ChlWidth);
2126 } else {
2127 network->bssht.bdSupportHT = false;
2128 network->bssht.bdHT1R = false;
2129 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20;
2130 }
2131 break;
2132
2133
2134 case MFIE_TYPE_HT_INFO:
2135 RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2136 info_element->len);
2137 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
2138 if (tmp_htinfo_len) {
2139 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2140 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2141 sizeof(network->bssht.bdHTInfoBuf) ?
2142 sizeof(network->bssht.bdHTInfoBuf) :
2143 tmp_htinfo_len;
2144 memcpy(network->bssht.bdHTInfoBuf,
2145 info_element->data,
2146 network->bssht.bdHTInfoLen);
2147 }
2148 break;
2149
2150 case MFIE_TYPE_AIRONET:
2151 RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2152 info_element->len);
2153 if (info_element->len > IE_CISCO_FLAG_POSITION) {
2154 network->bWithAironetIE = true;
2155
2156 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2157 & SUPPORT_CKIP_MIC) ||
2158 (info_element->data[IE_CISCO_FLAG_POSITION]
2159 & SUPPORT_CKIP_PK))
2160 network->bCkipSupported = true;
2161 else
2162 network->bCkipSupported = false;
2163 } else {
2164 network->bWithAironetIE = false;
2165 network->bCkipSupported = false;
2166 }
2167 break;
2168 case MFIE_TYPE_QOS_PARAMETER:
2169 printk(KERN_ERR
2170 "QoS Error need to parse QOS_PARAMETER IE\n");
2171 break;
2172
2173 case MFIE_TYPE_COUNTRY:
2174 RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2175 info_element->len);
2176 rtllib_extract_country_ie(ieee, info_element, network,
2177 network->bssid);
2178 break;
2179 /* TODO */
2180 default:
2181 RTLLIB_DEBUG_MGMT
2182 ("Unsupported info element: %s (%d)\n",
2183 get_info_element_string(info_element->id),
2184 info_element->id);
2185 break;
2186 }
2187
2188 length -= sizeof(*info_element) + info_element->len;
2189 info_element =
2190 (struct rtllib_info_element *)&info_element->
2191 data[info_element->len];
2192 }
2193
2194 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2195 !network->cisco_cap_exist && !network->ralink_cap_exist &&
2196 !network->bssht.bdRT2RTAggregation)
2197 network->unknown_cap_exist = true;
2198 else
2199 network->unknown_cap_exist = false;
2200 return 0;
2201 }
2202
2203 static inline u8 rtllib_SignalStrengthTranslate(u8 CurrSS)
2204 {
2205 u8 RetSS;
2206
2207 if (CurrSS >= 71 && CurrSS <= 100)
2208 RetSS = 90 + ((CurrSS - 70) / 3);
2209 else if (CurrSS >= 41 && CurrSS <= 70)
2210 RetSS = 78 + ((CurrSS - 40) / 3);
2211 else if (CurrSS >= 31 && CurrSS <= 40)
2212 RetSS = 66 + (CurrSS - 30);
2213 else if (CurrSS >= 21 && CurrSS <= 30)
2214 RetSS = 54 + (CurrSS - 20);
2215 else if (CurrSS >= 5 && CurrSS <= 20)
2216 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2217 else if (CurrSS == 4)
2218 RetSS = 36;
2219 else if (CurrSS == 3)
2220 RetSS = 27;
2221 else if (CurrSS == 2)
2222 RetSS = 18;
2223 else if (CurrSS == 1)
2224 RetSS = 9;
2225 else
2226 RetSS = CurrSS;
2227
2228 return RetSS;
2229 }
2230
2231 static long rtllib_translate_todbm(u8 signal_strength_index)
2232 {
2233 long signal_power;
2234
2235 signal_power = (long)((signal_strength_index + 1) >> 1);
2236 signal_power -= 95;
2237
2238 return signal_power;
2239 }
2240
2241 static inline int rtllib_network_init(
2242 struct rtllib_device *ieee,
2243 struct rtllib_probe_response *beacon,
2244 struct rtllib_network *network,
2245 struct rtllib_rx_stats *stats)
2246 {
2247
2248 /*
2249 network->qos_data.active = 0;
2250 network->qos_data.supported = 0;
2251 network->qos_data.param_count = 0;
2252 network->qos_data.old_param_count = 0;
2253 */
2254 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2255
2256 /* Pull out fixed field data */
2257 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2258 network->capability = le16_to_cpu(beacon->capability);
2259 network->last_scanned = jiffies;
2260 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2261 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2262 network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
2263 /* Where to pull this? beacon->listen_interval;*/
2264 network->listen_interval = 0x0A;
2265 network->rates_len = network->rates_ex_len = 0;
2266 network->last_associate = 0;
2267 network->ssid_len = 0;
2268 network->hidden_ssid_len = 0;
2269 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2270 network->flags = 0;
2271 network->atim_window = 0;
2272 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2273 0x3 : 0x0;
2274 network->berp_info_valid = false;
2275 network->broadcom_cap_exist = false;
2276 network->ralink_cap_exist = false;
2277 network->atheros_cap_exist = false;
2278 network->cisco_cap_exist = false;
2279 network->unknown_cap_exist = false;
2280 network->realtek_cap_exit = false;
2281 network->marvell_cap_exist = false;
2282 network->airgo_cap_exist = false;
2283 network->Turbo_Enable = 0;
2284 network->SignalStrength = stats->SignalStrength;
2285 network->RSSI = stats->SignalStrength;
2286 network->CountryIeLen = 0;
2287 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2288 HTInitializeBssDesc(&network->bssht);
2289 if (stats->freq == RTLLIB_52GHZ_BAND) {
2290 /* for A band (No DS info) */
2291 network->channel = stats->received_channel;
2292 } else
2293 network->flags |= NETWORK_HAS_CCK;
2294
2295 network->wpa_ie_len = 0;
2296 network->rsn_ie_len = 0;
2297 network->wzc_ie_len = 0;
2298
2299 if (rtllib_parse_info_param(ieee,
2300 beacon->info_element,
2301 (stats->len - sizeof(*beacon)),
2302 network,
2303 stats))
2304 return 1;
2305
2306 network->mode = 0;
2307 if (stats->freq == RTLLIB_52GHZ_BAND)
2308 network->mode = IEEE_A;
2309 else {
2310 if (network->flags & NETWORK_HAS_OFDM)
2311 network->mode |= IEEE_G;
2312 if (network->flags & NETWORK_HAS_CCK)
2313 network->mode |= IEEE_B;
2314 }
2315
2316 if (network->mode == 0) {
2317 RTLLIB_DEBUG_SCAN("Filtered out '%s (%pM)' "
2318 "network.\n",
2319 escape_essid(network->ssid,
2320 network->ssid_len),
2321 network->bssid);
2322 return 1;
2323 }
2324
2325 if (network->bssht.bdSupportHT) {
2326 if (network->mode == IEEE_A)
2327 network->mode = IEEE_N_5G;
2328 else if (network->mode & (IEEE_G | IEEE_B))
2329 network->mode = IEEE_N_24G;
2330 }
2331 if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2332 network->flags |= NETWORK_EMPTY_ESSID;
2333 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2334 stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2335
2336 memcpy(&network->stats, stats, sizeof(network->stats));
2337
2338 return 0;
2339 }
2340
2341 static inline int is_same_network(struct rtllib_network *src,
2342 struct rtllib_network *dst, u8 ssidbroad)
2343 {
2344 /* A network is only a duplicate if the channel, BSSID, ESSID
2345 * and the capability field (in particular IBSS and BSS) all match.
2346 * We treat all <hidden> with the same BSSID and channel
2347 * as one network */
2348 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2349 (src->channel == dst->channel) &&
2350 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2351 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2352 (!ssidbroad)) &&
2353 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2354 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2355 ((src->capability & WLAN_CAPABILITY_ESS) ==
2356 (dst->capability & WLAN_CAPABILITY_ESS)));
2357 }
2358
2359 static inline void update_ibss_network(struct rtllib_network *dst,
2360 struct rtllib_network *src)
2361 {
2362 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2363 dst->last_scanned = jiffies;
2364 }
2365
2366
2367 static inline void update_network(struct rtllib_network *dst,
2368 struct rtllib_network *src)
2369 {
2370 int qos_active;
2371 u8 old_param;
2372
2373 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2374 dst->capability = src->capability;
2375 memcpy(dst->rates, src->rates, src->rates_len);
2376 dst->rates_len = src->rates_len;
2377 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2378 dst->rates_ex_len = src->rates_ex_len;
2379 if (src->ssid_len > 0) {
2380 if (dst->ssid_len == 0) {
2381 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2382 dst->hidden_ssid_len = src->ssid_len;
2383 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2384 } else {
2385 memset(dst->ssid, 0, dst->ssid_len);
2386 dst->ssid_len = src->ssid_len;
2387 memcpy(dst->ssid, src->ssid, src->ssid_len);
2388 }
2389 }
2390 dst->mode = src->mode;
2391 dst->flags = src->flags;
2392 dst->time_stamp[0] = src->time_stamp[0];
2393 dst->time_stamp[1] = src->time_stamp[1];
2394 if (src->flags & NETWORK_HAS_ERP_VALUE) {
2395 dst->erp_value = src->erp_value;
2396 dst->berp_info_valid = src->berp_info_valid = true;
2397 }
2398 dst->beacon_interval = src->beacon_interval;
2399 dst->listen_interval = src->listen_interval;
2400 dst->atim_window = src->atim_window;
2401 dst->dtim_period = src->dtim_period;
2402 dst->dtim_data = src->dtim_data;
2403 dst->last_dtim_sta_time = src->last_dtim_sta_time;
2404 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2405
2406 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2407 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2408 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2409 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2410 src->bssht.bdHTCapLen);
2411 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2412 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2413 src->bssht.bdHTInfoLen);
2414 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2415 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2416 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2417 dst->ralink_cap_exist = src->ralink_cap_exist;
2418 dst->atheros_cap_exist = src->atheros_cap_exist;
2419 dst->realtek_cap_exit = src->realtek_cap_exit;
2420 dst->marvell_cap_exist = src->marvell_cap_exist;
2421 dst->cisco_cap_exist = src->cisco_cap_exist;
2422 dst->airgo_cap_exist = src->airgo_cap_exist;
2423 dst->unknown_cap_exist = src->unknown_cap_exist;
2424 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2425 dst->wpa_ie_len = src->wpa_ie_len;
2426 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2427 dst->rsn_ie_len = src->rsn_ie_len;
2428 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2429 dst->wzc_ie_len = src->wzc_ie_len;
2430
2431 dst->last_scanned = jiffies;
2432 /* qos related parameters */
2433 qos_active = dst->qos_data.active;
2434 old_param = dst->qos_data.param_count;
2435 dst->qos_data.supported = src->qos_data.supported;
2436 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2437 memcpy(&dst->qos_data, &src->qos_data,
2438 sizeof(struct rtllib_qos_data));
2439 if (dst->qos_data.supported == 1) {
2440 if (dst->ssid_len)
2441 RTLLIB_DEBUG_QOS
2442 ("QoS the network %s is QoS supported\n",
2443 dst->ssid);
2444 else
2445 RTLLIB_DEBUG_QOS
2446 ("QoS the network is QoS supported\n");
2447 }
2448 dst->qos_data.active = qos_active;
2449 dst->qos_data.old_param_count = old_param;
2450
2451 /* dst->last_associate is not overwritten */
2452 dst->wmm_info = src->wmm_info;
2453 if (src->wmm_param[0].ac_aci_acm_aifsn ||
2454 src->wmm_param[1].ac_aci_acm_aifsn ||
2455 src->wmm_param[2].ac_aci_acm_aifsn ||
2456 src->wmm_param[1].ac_aci_acm_aifsn)
2457 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2458
2459 dst->SignalStrength = src->SignalStrength;
2460 dst->RSSI = src->RSSI;
2461 dst->Turbo_Enable = src->Turbo_Enable;
2462
2463 dst->CountryIeLen = src->CountryIeLen;
2464 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2465
2466 dst->bWithAironetIE = src->bWithAironetIE;
2467 dst->bCkipSupported = src->bCkipSupported;
2468 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2469 dst->bCcxRmEnable = src->bCcxRmEnable;
2470 dst->MBssidMask = src->MBssidMask;
2471 dst->bMBssidValid = src->bMBssidValid;
2472 memcpy(dst->MBssid, src->MBssid, 6);
2473 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2474 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2475 }
2476
2477 static inline int is_beacon(__le16 fc)
2478 {
2479 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2480 }
2481
2482 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2483 {
2484 if (MAX_CHANNEL_NUMBER < channel) {
2485 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
2486 return 0;
2487 }
2488
2489 if (rtllib->active_channel_map[channel] == 2)
2490 return 1;
2491
2492 return 0;
2493 }
2494
2495 int IsLegalChannel(struct rtllib_device *rtllib, u8 channel)
2496 {
2497 if (MAX_CHANNEL_NUMBER < channel) {
2498 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
2499 return 0;
2500 }
2501 if (rtllib->active_channel_map[channel] > 0)
2502 return 1;
2503
2504 return 0;
2505 }
2506
2507 static inline void rtllib_process_probe_response(
2508 struct rtllib_device *ieee,
2509 struct rtllib_probe_response *beacon,
2510 struct rtllib_rx_stats *stats)
2511 {
2512 struct rtllib_network *target;
2513 struct rtllib_network *oldest = NULL;
2514 struct rtllib_info_element *info_element = &beacon->info_element[0];
2515 unsigned long flags;
2516 short renew;
2517 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2518 GFP_ATOMIC);
2519
2520 if (!network)
2521 return;
2522
2523 RTLLIB_DEBUG_SCAN(
2524 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2525 escape_essid(info_element->data, info_element->len),
2526 beacon->header.addr3,
2527 (beacon->capability & (1<<0xf)) ? '1' : '0',
2528 (beacon->capability & (1<<0xe)) ? '1' : '0',
2529 (beacon->capability & (1<<0xd)) ? '1' : '0',
2530 (beacon->capability & (1<<0xc)) ? '1' : '0',
2531 (beacon->capability & (1<<0xb)) ? '1' : '0',
2532 (beacon->capability & (1<<0xa)) ? '1' : '0',
2533 (beacon->capability & (1<<0x9)) ? '1' : '0',
2534 (beacon->capability & (1<<0x8)) ? '1' : '0',
2535 (beacon->capability & (1<<0x7)) ? '1' : '0',
2536 (beacon->capability & (1<<0x6)) ? '1' : '0',
2537 (beacon->capability & (1<<0x5)) ? '1' : '0',
2538 (beacon->capability & (1<<0x4)) ? '1' : '0',
2539 (beacon->capability & (1<<0x3)) ? '1' : '0',
2540 (beacon->capability & (1<<0x2)) ? '1' : '0',
2541 (beacon->capability & (1<<0x1)) ? '1' : '0',
2542 (beacon->capability & (1<<0x0)) ? '1' : '0');
2543
2544 if (rtllib_network_init(ieee, beacon, network, stats)) {
2545 RTLLIB_DEBUG_SCAN("Dropped '%s' ( %pM) via %s.\n",
2546 escape_essid(info_element->data,
2547 info_element->len),
2548 beacon->header.addr3,
2549 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2550 RTLLIB_STYPE_PROBE_RESP ?
2551 "PROBE RESPONSE" : "BEACON");
2552 goto free_network;
2553 }
2554
2555
2556 if (!IsLegalChannel(ieee, network->channel))
2557 goto free_network;
2558
2559 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2560 RTLLIB_STYPE_PROBE_RESP) {
2561 if (IsPassiveChannel(ieee, network->channel)) {
2562 printk(KERN_INFO "GetScanInfo(): For Global Domain, "
2563 "filter probe response at channel(%d).\n",
2564 network->channel);
2565 goto free_network;
2566 }
2567 }
2568
2569 /* The network parsed correctly -- so now we scan our known networks
2570 * to see if we can find it in our list.
2571 *
2572 * NOTE: This search is definitely not optimized. Once its doing
2573 * the "right thing" we'll optimize it for efficiency if
2574 * necessary */
2575
2576 /* Search for this entry in the list and update it if it is
2577 * already there. */
2578
2579 spin_lock_irqsave(&ieee->lock, flags);
2580 if (is_same_network(&ieee->current_network, network,
2581 (network->ssid_len ? 1 : 0))) {
2582 update_network(&ieee->current_network, network);
2583 if ((ieee->current_network.mode == IEEE_N_24G ||
2584 ieee->current_network.mode == IEEE_G)
2585 && ieee->current_network.berp_info_valid) {
2586 if (ieee->current_network.erp_value & ERP_UseProtection)
2587 ieee->current_network.buseprotection = true;
2588 else
2589 ieee->current_network.buseprotection = false;
2590 }
2591 if (is_beacon(beacon->header.frame_ctl)) {
2592 if (ieee->state >= RTLLIB_LINKED)
2593 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2594 }
2595 }
2596 list_for_each_entry(target, &ieee->network_list, list) {
2597 if (is_same_network(target, network,
2598 (target->ssid_len ? 1 : 0)))
2599 break;
2600 if ((oldest == NULL) ||
2601 (target->last_scanned < oldest->last_scanned))
2602 oldest = target;
2603 }
2604
2605 /* If we didn't find a match, then get a new network slot to initialize
2606 * with this beacon's information */
2607 if (&target->list == &ieee->network_list) {
2608 if (list_empty(&ieee->network_free_list)) {
2609 /* If there are no more slots, expire the oldest */
2610 list_del(&oldest->list);
2611 target = oldest;
2612 RTLLIB_DEBUG_SCAN("Expired '%s' ( %pM) from "
2613 "network list.\n",
2614 escape_essid(target->ssid,
2615 target->ssid_len),
2616 target->bssid);
2617 } else {
2618 /* Otherwise just pull from the free list */
2619 target = list_entry(ieee->network_free_list.next,
2620 struct rtllib_network, list);
2621 list_del(ieee->network_free_list.next);
2622 }
2623
2624
2625 RTLLIB_DEBUG_SCAN("Adding '%s' ( %pM) via %s.\n",
2626 escape_essid(network->ssid,
2627 network->ssid_len), network->bssid,
2628 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2629 RTLLIB_STYPE_PROBE_RESP ?
2630 "PROBE RESPONSE" : "BEACON");
2631 memcpy(target, network, sizeof(*target));
2632 list_add_tail(&target->list, &ieee->network_list);
2633 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2634 rtllib_softmac_new_net(ieee, network);
2635 } else {
2636 RTLLIB_DEBUG_SCAN("Updating '%s' ( %pM) via %s.\n",
2637 escape_essid(target->ssid,
2638 target->ssid_len), target->bssid,
2639 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2640 RTLLIB_STYPE_PROBE_RESP ?
2641 "PROBE RESPONSE" : "BEACON");
2642
2643 /* we have an entry and we are going to update it. But this
2644 * entry may be already expired. In this case we do the same
2645 * as we found a new net and call the new_net handler
2646 */
2647 renew = !time_after(target->last_scanned + ieee->scan_age,
2648 jiffies);
2649 if ((!target->ssid_len) &&
2650 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2651 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2652 (strncmp(ieee->current_network.ssid, network->ssid,
2653 network->ssid_len) == 0) &&
2654 (ieee->state == RTLLIB_NOLINK))))
2655 renew = 1;
2656 update_network(target, network);
2657 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2658 rtllib_softmac_new_net(ieee, network);
2659 }
2660
2661 spin_unlock_irqrestore(&ieee->lock, flags);
2662 if (is_beacon(beacon->header.frame_ctl) &&
2663 is_same_network(&ieee->current_network, network,
2664 (network->ssid_len ? 1 : 0)) &&
2665 (ieee->state == RTLLIB_LINKED)) {
2666 if (ieee->handle_beacon != NULL)
2667 ieee->handle_beacon(ieee->dev, beacon,
2668 &ieee->current_network);
2669 }
2670 free_network:
2671 kfree(network);
2672 return;
2673 }
2674
2675 void rtllib_rx_mgt(struct rtllib_device *ieee,
2676 struct sk_buff *skb,
2677 struct rtllib_rx_stats *stats)
2678 {
2679 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ;
2680
2681 if (WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_PROBE_RESP &&
2682 WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_BEACON)
2683 ieee->last_rx_ps_time = jiffies;
2684
2685 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2686
2687 case RTLLIB_STYPE_BEACON:
2688 RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
2689 WLAN_FC_GET_STYPE(header->frame_ctl));
2690 RTLLIB_DEBUG_SCAN("Beacon\n");
2691 rtllib_process_probe_response(
2692 ieee, (struct rtllib_probe_response *)header,
2693 stats);
2694
2695 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2696 ieee->iw_mode == IW_MODE_INFRA &&
2697 ieee->state == RTLLIB_LINKED))
2698 tasklet_schedule(&ieee->ps_task);
2699
2700 break;
2701
2702 case RTLLIB_STYPE_PROBE_RESP:
2703 RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2704 WLAN_FC_GET_STYPE(header->frame_ctl));
2705 RTLLIB_DEBUG_SCAN("Probe response\n");
2706 rtllib_process_probe_response(ieee,
2707 (struct rtllib_probe_response *)header, stats);
2708 break;
2709 case RTLLIB_STYPE_PROBE_REQ:
2710 RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
2711 WLAN_FC_GET_STYPE(header->frame_ctl));
2712 RTLLIB_DEBUG_SCAN("Probe request\n");
2713 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2714 ((ieee->iw_mode == IW_MODE_ADHOC ||
2715 ieee->iw_mode == IW_MODE_MASTER) &&
2716 ieee->state == RTLLIB_LINKED))
2717 rtllib_rx_probe_rq(ieee, skb);
2718 break;
2719 }
2720 }
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