projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
[deliverable/linux.git] / drivers / staging / rtl8192e / rtllib_rx.c
1 /*
2 * Original code based Host AP (software wireless LAN access point) driver
3 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
4 *
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6 * <jkmaline@cc.hut.fi>
7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
8 * Copyright (c) 2004, Intel Corporation
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation. See README and COPYING for
13 * more details.
14 ******************************************************************************
15
16 Few modifications for Realtek's Wi-Fi drivers by
17 Andrea Merello <andrea.merello@gmail.com>
18
19 A special thanks goes to Realtek for their support !
20
21 ******************************************************************************/
22
23
24 #include <linux/compiler.h>
25 #include <linux/errno.h>
26 #include <linux/if_arp.h>
27 #include <linux/in6.h>
28 #include <linux/in.h>
29 #include <linux/ip.h>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/netdevice.h>
33 #include <linux/pci.h>
34 #include <linux/proc_fs.h>
35 #include <linux/skbuff.h>
36 #include <linux/slab.h>
37 #include <linux/tcp.h>
38 #include <linux/types.h>
39 #include <linux/wireless.h>
40 #include <linux/etherdevice.h>
41 #include <linux/uaccess.h>
42 #include <linux/ctype.h>
43
44 #include "rtllib.h"
45 #include "dot11d.h"
46
47 static void rtllib_rx_mgt(struct rtllib_device *ieee, struct sk_buff *skb,
48 struct rtllib_rx_stats *stats);
49
50 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
51 struct sk_buff *skb,
52 struct rtllib_rx_stats *rx_status,
53 size_t hdr_length)
54 {
55 skb->dev = ieee->dev;
56 skb_reset_mac_header(skb);
57 skb_pull(skb, hdr_length);
58 skb->pkt_type = PACKET_OTHERHOST;
59 skb->protocol = htons(ETH_P_80211_RAW);
60 memset(skb->cb, 0, sizeof(skb->cb));
61 netif_rx(skb);
62 }
63
64 /* Called only as a tasklet (software IRQ) */
65 static struct rtllib_frag_entry *
66 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
67 unsigned int frag, u8 tid, u8 *src, u8 *dst)
68 {
69 struct rtllib_frag_entry *entry;
70 int i;
71
72 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
73 entry = &ieee->frag_cache[tid][i];
74 if (entry->skb != NULL &&
75 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
76 netdev_dbg(ieee->dev,
77 "expiring fragment cache entry seq=%u last_frag=%u\n",
78 entry->seq, entry->last_frag);
79 dev_kfree_skb_any(entry->skb);
80 entry->skb = NULL;
81 }
82
83 if (entry->skb != NULL && entry->seq == seq &&
84 (entry->last_frag + 1 == frag || frag == -1) &&
85 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
86 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
87 return entry;
88 }
89
90 return NULL;
91 }
92
93 /* Called only as a tasklet (software IRQ) */
94 static struct sk_buff *
95 rtllib_frag_cache_get(struct rtllib_device *ieee,
96 struct rtllib_hdr_4addr *hdr)
97 {
98 struct sk_buff *skb = NULL;
99 u16 fc = le16_to_cpu(hdr->frame_ctl);
100 u16 sc = le16_to_cpu(hdr->seq_ctl);
101 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
102 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
103 struct rtllib_frag_entry *entry;
104 struct rtllib_hdr_3addrqos *hdr_3addrqos;
105 struct rtllib_hdr_4addrqos *hdr_4addrqos;
106 u8 tid;
107
108 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
109 RTLLIB_QOS_HAS_SEQ(fc)) {
110 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
111 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
112 tid = UP2AC(tid);
113 tid++;
114 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
115 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
116 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
117 tid = UP2AC(tid);
118 tid++;
119 } else {
120 tid = 0;
121 }
122
123 if (frag == 0) {
124 /* Reserve enough space to fit maximum frame length */
125 skb = dev_alloc_skb(ieee->dev->mtu +
126 sizeof(struct rtllib_hdr_4addr) +
127 8 /* LLC */ +
128 2 /* alignment */ +
129 8 /* WEP */ +
130 ETH_ALEN /* WDS */ +
131 /* QOS Control */
132 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0));
133 if (skb == NULL)
134 return NULL;
135
136 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
137 ieee->frag_next_idx[tid]++;
138 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
139 ieee->frag_next_idx[tid] = 0;
140
141 if (entry->skb != NULL)
142 dev_kfree_skb_any(entry->skb);
143
144 entry->first_frag_time = jiffies;
145 entry->seq = seq;
146 entry->last_frag = frag;
147 entry->skb = skb;
148 ether_addr_copy(entry->src_addr, hdr->addr2);
149 ether_addr_copy(entry->dst_addr, hdr->addr1);
150 } else {
151 /* received a fragment of a frame for which the head fragment
152 * should have already been received
153 */
154 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
155 hdr->addr1);
156 if (entry != NULL) {
157 entry->last_frag = frag;
158 skb = entry->skb;
159 }
160 }
161
162 return skb;
163 }
164
165
166 /* Called only as a tasklet (software IRQ) */
167 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
168 struct rtllib_hdr_4addr *hdr)
169 {
170 u16 fc = le16_to_cpu(hdr->frame_ctl);
171 u16 sc = le16_to_cpu(hdr->seq_ctl);
172 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
173 struct rtllib_frag_entry *entry;
174 struct rtllib_hdr_3addrqos *hdr_3addrqos;
175 struct rtllib_hdr_4addrqos *hdr_4addrqos;
176 u8 tid;
177
178 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
179 RTLLIB_QOS_HAS_SEQ(fc)) {
180 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
181 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
182 tid = UP2AC(tid);
183 tid++;
184 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
185 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
186 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
187 tid = UP2AC(tid);
188 tid++;
189 } else {
190 tid = 0;
191 }
192
193 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
194 hdr->addr1);
195
196 if (entry == NULL) {
197 netdev_dbg(ieee->dev,
198 "Couldn't invalidate fragment cache entry (seq=%u)\n",
199 seq);
200 return -1;
201 }
202
203 entry->skb = NULL;
204 return 0;
205 }
206
207 /* rtllib_rx_frame_mgtmt
208 *
209 * Responsible for handling management control frames
210 *
211 * Called by rtllib_rx
212 */
213 static inline int
214 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
215 struct rtllib_rx_stats *rx_stats, u16 type,
216 u16 stype)
217 {
218 /* On the struct stats definition there is written that
219 * this is not mandatory.... but seems that the probe
220 * response parser uses it
221 */
222 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
223
224 rx_stats->len = skb->len;
225 rtllib_rx_mgt(ieee, skb, rx_stats);
226 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
227 dev_kfree_skb_any(skb);
228 return 0;
229 }
230 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
231
232 dev_kfree_skb_any(skb);
233
234 return 0;
235 }
236
237 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation
238 * Ethernet-II snap header (RFC1042 for most EtherTypes)
239 */
240 static unsigned char rfc1042_header[] = {
241 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
242 };
243 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
244 static unsigned char bridge_tunnel_header[] = {
245 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
246 };
247 /* No encapsulation header if EtherType < 0x600 (=length) */
248
249 /* Called by rtllib_rx_frame_decrypt */
250 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
251 struct sk_buff *skb, size_t hdrlen)
252 {
253 struct net_device *dev = ieee->dev;
254 u16 fc, ethertype;
255 struct rtllib_hdr_4addr *hdr;
256 u8 *pos;
257
258 if (skb->len < 24)
259 return 0;
260
261 hdr = (struct rtllib_hdr_4addr *) skb->data;
262 fc = le16_to_cpu(hdr->frame_ctl);
263
264 /* check that the frame is unicast frame to us */
265 if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
266 RTLLIB_FCTL_TODS &&
267 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
268 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
269 /* ToDS frame with own addr BSSID and DA */
270 } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
271 RTLLIB_FCTL_FROMDS &&
272 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
273 /* FromDS frame with own addr as DA */
274 } else
275 return 0;
276
277 if (skb->len < 24 + 8)
278 return 0;
279
280 /* check for port access entity Ethernet type */
281 pos = skb->data + hdrlen;
282 ethertype = (pos[6] << 8) | pos[7];
283 if (ethertype == ETH_P_PAE)
284 return 1;
285
286 return 0;
287 }
288
289 /* Called only as a tasklet (software IRQ), by rtllib_rx */
290 static inline int
291 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
292 struct lib80211_crypt_data *crypt)
293 {
294 struct rtllib_hdr_4addr *hdr;
295 int res, hdrlen;
296
297 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
298 return 0;
299
300 if (ieee->hwsec_active) {
301 struct cb_desc *tcb_desc = (struct cb_desc *)
302 (skb->cb + MAX_DEV_ADDR_SIZE);
303
304 tcb_desc->bHwSec = 1;
305
306 if (ieee->need_sw_enc)
307 tcb_desc->bHwSec = 0;
308 }
309
310 hdr = (struct rtllib_hdr_4addr *) skb->data;
311 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
312
313 atomic_inc(&crypt->refcnt);
314 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
315 atomic_dec(&crypt->refcnt);
316 if (res < 0) {
317 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n",
318 hdr->addr2, res);
319 if (res == -2)
320 netdev_dbg(ieee->dev,
321 "Decryption failed ICV mismatch (key %d)\n",
322 skb->data[hdrlen + 3] >> 6);
323 return -1;
324 }
325
326 return res;
327 }
328
329
330 /* Called only as a tasklet (software IRQ), by rtllib_rx */
331 static inline int
332 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
333 int keyidx, struct lib80211_crypt_data *crypt)
334 {
335 struct rtllib_hdr_4addr *hdr;
336 int res, hdrlen;
337
338 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
339 return 0;
340 if (ieee->hwsec_active) {
341 struct cb_desc *tcb_desc = (struct cb_desc *)
342 (skb->cb + MAX_DEV_ADDR_SIZE);
343
344 tcb_desc->bHwSec = 1;
345
346 if (ieee->need_sw_enc)
347 tcb_desc->bHwSec = 0;
348 }
349
350 hdr = (struct rtllib_hdr_4addr *) skb->data;
351 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
352
353 atomic_inc(&crypt->refcnt);
354 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
355 atomic_dec(&crypt->refcnt);
356 if (res < 0) {
357 netdev_dbg(ieee->dev,
358 "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
359 hdr->addr2, keyidx);
360 return -1;
361 }
362
363 return 0;
364 }
365
366
367 /* this function is stolen from ipw2200 driver*/
368 #define IEEE_PACKET_RETRY_TIME (5*HZ)
369 static int is_duplicate_packet(struct rtllib_device *ieee,
370 struct rtllib_hdr_4addr *header)
371 {
372 u16 fc = le16_to_cpu(header->frame_ctl);
373 u16 sc = le16_to_cpu(header->seq_ctl);
374 u16 seq = WLAN_GET_SEQ_SEQ(sc);
375 u16 frag = WLAN_GET_SEQ_FRAG(sc);
376 u16 *last_seq, *last_frag;
377 unsigned long *last_time;
378 struct rtllib_hdr_3addrqos *hdr_3addrqos;
379 struct rtllib_hdr_4addrqos *hdr_4addrqos;
380 u8 tid;
381
382 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
383 RTLLIB_QOS_HAS_SEQ(fc)) {
384 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
385 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
386 tid = UP2AC(tid);
387 tid++;
388 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
389 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
390 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
391 tid = UP2AC(tid);
392 tid++;
393 } else {
394 tid = 0;
395 }
396
397 switch (ieee->iw_mode) {
398 case IW_MODE_ADHOC:
399 {
400 struct list_head *p;
401 struct ieee_ibss_seq *entry = NULL;
402 u8 *mac = header->addr2;
403 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
404
405 list_for_each(p, &ieee->ibss_mac_hash[index]) {
406 entry = list_entry(p, struct ieee_ibss_seq, list);
407 if (!memcmp(entry->mac, mac, ETH_ALEN))
408 break;
409 }
410 if (p == &ieee->ibss_mac_hash[index]) {
411 entry = kmalloc(sizeof(struct ieee_ibss_seq),
412 GFP_ATOMIC);
413 if (!entry)
414 return 0;
415
416 ether_addr_copy(entry->mac, mac);
417 entry->seq_num[tid] = seq;
418 entry->frag_num[tid] = frag;
419 entry->packet_time[tid] = jiffies;
420 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
421 return 0;
422 }
423 last_seq = &entry->seq_num[tid];
424 last_frag = &entry->frag_num[tid];
425 last_time = &entry->packet_time[tid];
426 break;
427 }
428
429 case IW_MODE_INFRA:
430 last_seq = &ieee->last_rxseq_num[tid];
431 last_frag = &ieee->last_rxfrag_num[tid];
432 last_time = &ieee->last_packet_time[tid];
433 break;
434 default:
435 return 0;
436 }
437
438 if ((*last_seq == seq) &&
439 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
440 if (*last_frag == frag)
441 goto drop;
442 if (*last_frag + 1 != frag)
443 /* out-of-order fragment */
444 goto drop;
445 } else
446 *last_seq = seq;
447
448 *last_frag = frag;
449 *last_time = jiffies;
450 return 0;
451
452 drop:
453
454 return 1;
455 }
456
457 static bool AddReorderEntry(struct rx_ts_record *pTS,
458 struct rx_reorder_entry *pReorderEntry)
459 {
460 struct list_head *pList = &pTS->RxPendingPktList;
461
462 while (pList->next != &pTS->RxPendingPktList) {
463 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
464 list_entry(pList->next, struct rx_reorder_entry,
465 List))->SeqNum))
466 pList = pList->next;
467 else if (SN_EQUAL(pReorderEntry->SeqNum,
468 ((struct rx_reorder_entry *)list_entry(pList->next,
469 struct rx_reorder_entry, List))->SeqNum))
470 return false;
471 else
472 break;
473 }
474 pReorderEntry->List.next = pList->next;
475 pReorderEntry->List.next->prev = &pReorderEntry->List;
476 pReorderEntry->List.prev = pList;
477 pList->next = &pReorderEntry->List;
478
479 return true;
480 }
481
482 void rtllib_indicate_packets(struct rtllib_device *ieee,
483 struct rtllib_rxb **prxbIndicateArray, u8 index)
484 {
485 struct net_device_stats *stats = &ieee->stats;
486 u8 i = 0, j = 0;
487 u16 ethertype;
488
489 for (j = 0; j < index; j++) {
490 struct rtllib_rxb *prxb = prxbIndicateArray[j];
491
492 for (i = 0; i < prxb->nr_subframes; i++) {
493 struct sk_buff *sub_skb = prxb->subframes[i];
494
495 /* convert hdr + possible LLC headers into Ethernet header */
496 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
497 if (sub_skb->len >= 8 &&
498 ((memcmp(sub_skb->data, rfc1042_header,
499 SNAP_SIZE) == 0 &&
500 ethertype != ETH_P_AARP &&
501 ethertype != ETH_P_IPX) ||
502 memcmp(sub_skb->data, bridge_tunnel_header,
503 SNAP_SIZE) == 0)) {
504 /* remove RFC1042 or Bridge-Tunnel encapsulation
505 * and replace EtherType
506 */
507 skb_pull(sub_skb, SNAP_SIZE);
508 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
509 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
510 } else {
511 u16 len;
512 /* Leave Ethernet header part of hdr and full payload */
513 len = sub_skb->len;
514 memcpy(skb_push(sub_skb, 2), &len, 2);
515 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
516 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
517 }
518
519 /* Indicate the packets to upper layer */
520 if (sub_skb) {
521 stats->rx_packets++;
522 stats->rx_bytes += sub_skb->len;
523
524 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
525 sub_skb->protocol = eth_type_trans(sub_skb,
526 ieee->dev);
527 sub_skb->dev = ieee->dev;
528 sub_skb->dev->stats.rx_packets++;
529 sub_skb->dev->stats.rx_bytes += sub_skb->len;
530 /* 802.11 crc not sufficient */
531 sub_skb->ip_summed = CHECKSUM_NONE;
532 ieee->last_rx_ps_time = jiffies;
533 netif_rx(sub_skb);
534 }
535 }
536 kfree(prxb);
537 prxb = NULL;
538 }
539 }
540
541 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,
542 struct rx_ts_record *pTS)
543 {
544 struct rx_reorder_entry *pRxReorderEntry;
545 u8 RfdCnt = 0;
546
547 del_timer_sync(&pTS->RxPktPendingTimer);
548 while (!list_empty(&pTS->RxPendingPktList)) {
549 if (RfdCnt >= REORDER_WIN_SIZE) {
550 netdev_info(ieee->dev,
551 "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n",
552 __func__);
553 break;
554 }
555
556 pRxReorderEntry = (struct rx_reorder_entry *)
557 list_entry(pTS->RxPendingPktList.prev,
558 struct rx_reorder_entry, List);
559 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__,
560 pRxReorderEntry->SeqNum);
561 list_del_init(&pRxReorderEntry->List);
562
563 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
564
565 RfdCnt = RfdCnt + 1;
566 list_add_tail(&pRxReorderEntry->List,
567 &ieee->RxReorder_Unused_List);
568 }
569 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
570
571 pTS->RxIndicateSeq = 0xffff;
572 }
573
574 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
575 struct rtllib_rxb *prxb,
576 struct rx_ts_record *pTS, u16 SeqNum)
577 {
578 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
579 struct rx_reorder_entry *pReorderEntry = NULL;
580 u8 WinSize = pHTInfo->RxReorderWinSize;
581 u16 WinEnd = 0;
582 u8 index = 0;
583 bool bMatchWinStart = false, bPktInBuf = false;
584 unsigned long flags;
585
586 netdev_dbg(ieee->dev,
587 "%s(): Seq is %d, pTS->RxIndicateSeq is %d, WinSize is %d\n",
588 __func__, SeqNum, pTS->RxIndicateSeq, WinSize);
589
590 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
591
592 WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
593 /* Rx Reorder initialize condition.*/
594 if (pTS->RxIndicateSeq == 0xffff)
595 pTS->RxIndicateSeq = SeqNum;
596
597 /* Drop out the packet which SeqNum is smaller than WinStart */
598 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
599 netdev_dbg(ieee->dev,
600 "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
601 pTS->RxIndicateSeq, SeqNum);
602 pHTInfo->RxReorderDropCounter++;
603 {
604 int i;
605
606 for (i = 0; i < prxb->nr_subframes; i++)
607 dev_kfree_skb(prxb->subframes[i]);
608 kfree(prxb);
609 prxb = NULL;
610 }
611 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
612 return;
613 }
614
615 /* Sliding window manipulation. Conditions includes:
616 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
617 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
618 */
619 if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
620 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
621 bMatchWinStart = true;
622 } else if (SN_LESS(WinEnd, SeqNum)) {
623 if (SeqNum >= (WinSize - 1))
624 pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
625 else
626 pTS->RxIndicateSeq = 4095 -
627 (WinSize - (SeqNum + 1)) + 1;
628 netdev_dbg(ieee->dev,
629 "Window Shift! IndicateSeq: %d, NewSeq: %d\n",
630 pTS->RxIndicateSeq, SeqNum);
631 }
632
633 /* Indication process.
634 * After Packet dropping and Sliding Window shifting as above, we can
635 * now just indicate the packets with the SeqNum smaller than latest
636 * WinStart and struct buffer other packets.
637 *
638 * For Rx Reorder condition:
639 * 1. All packets with SeqNum smaller than WinStart => Indicate
640 * 2. All packets with SeqNum larger than or equal to
641 * WinStart => Buffer it.
642 */
643 if (bMatchWinStart) {
644 /* Current packet is going to be indicated.*/
645 netdev_dbg(ieee->dev,
646 "Packets indication! IndicateSeq: %d, NewSeq: %d\n",
647 pTS->RxIndicateSeq, SeqNum);
648 ieee->prxbIndicateArray[0] = prxb;
649 index = 1;
650 } else {
651 /* Current packet is going to be inserted into pending list.*/
652 if (!list_empty(&ieee->RxReorder_Unused_List)) {
653 pReorderEntry = (struct rx_reorder_entry *)
654 list_entry(ieee->RxReorder_Unused_List.next,
655 struct rx_reorder_entry, List);
656 list_del_init(&pReorderEntry->List);
657
658 /* Make a reorder entry and insert
659 * into a the packet list.
660 */
661 pReorderEntry->SeqNum = SeqNum;
662 pReorderEntry->prxb = prxb;
663
664 if (!AddReorderEntry(pTS, pReorderEntry)) {
665 int i;
666
667 netdev_dbg(ieee->dev,
668 "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n",
669 __func__, pTS->RxIndicateSeq,
670 SeqNum);
671 list_add_tail(&pReorderEntry->List,
672 &ieee->RxReorder_Unused_List);
673
674 for (i = 0; i < prxb->nr_subframes; i++)
675 dev_kfree_skb(prxb->subframes[i]);
676 kfree(prxb);
677 prxb = NULL;
678 } else {
679 netdev_dbg(ieee->dev,
680 "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n",
681 pTS->RxIndicateSeq, SeqNum);
682 }
683 } else {
684 /* Packets are dropped if there are not enough reorder
685 * entries. This part should be modified!! We can just
686 * indicate all the packets in struct buffer and get
687 * reorder entries.
688 */
689 netdev_err(ieee->dev,
690 "%s(): There is no reorder entry! Packet is dropped!\n",
691 __func__);
692 {
693 int i;
694
695 for (i = 0; i < prxb->nr_subframes; i++)
696 dev_kfree_skb(prxb->subframes[i]);
697 kfree(prxb);
698 prxb = NULL;
699 }
700 }
701 }
702
703 /* Check if there is any packet need indicate.*/
704 while (!list_empty(&pTS->RxPendingPktList)) {
705 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n",
706 __func__);
707
708 pReorderEntry = (struct rx_reorder_entry *)
709 list_entry(pTS->RxPendingPktList.prev,
710 struct rx_reorder_entry,
711 List);
712 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
713 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
714 /* This protect struct buffer from overflow. */
715 if (index >= REORDER_WIN_SIZE) {
716 netdev_err(ieee->dev,
717 "%s(): Buffer overflow!\n",
718 __func__);
719 bPktInBuf = true;
720 break;
721 }
722
723 list_del_init(&pReorderEntry->List);
724
725 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
726 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) %
727 4096;
728
729 ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
730 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n",
731 __func__, pReorderEntry->SeqNum);
732 index++;
733
734 list_add_tail(&pReorderEntry->List,
735 &ieee->RxReorder_Unused_List);
736 } else {
737 bPktInBuf = true;
738 break;
739 }
740 }
741
742 /* Handling pending timer. Set this timer to prevent from long time
743 * Rx buffering.
744 */
745 if (index > 0) {
746 if (timer_pending(&pTS->RxPktPendingTimer))
747 del_timer_sync(&pTS->RxPktPendingTimer);
748 pTS->RxTimeoutIndicateSeq = 0xffff;
749
750 if (index > REORDER_WIN_SIZE) {
751 netdev_err(ieee->dev,
752 "%s(): Rx Reorder struct buffer full!\n",
753 __func__);
754 spin_unlock_irqrestore(&(ieee->reorder_spinlock),
755 flags);
756 return;
757 }
758 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
759 bPktInBuf = false;
760 }
761
762 if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
763 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__);
764 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
765 mod_timer(&pTS->RxPktPendingTimer, jiffies +
766 msecs_to_jiffies(pHTInfo->RxReorderPendingTime));
767 }
768 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
769 }
770
771 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
772 struct rtllib_rx_stats *rx_stats,
773 struct rtllib_rxb *rxb, u8 *src, u8 *dst)
774 {
775 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
776 u16 fc = le16_to_cpu(hdr->frame_ctl);
777
778 u16 LLCOffset = sizeof(struct rtllib_hdr_3addr);
779 u16 ChkLength;
780 bool bIsAggregateFrame = false;
781 u16 nSubframe_Length;
782 u8 nPadding_Length = 0;
783 u16 SeqNum = 0;
784 struct sk_buff *sub_skb;
785 u8 *data_ptr;
786 /* just for debug purpose */
787 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
788 if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
789 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
790 bIsAggregateFrame = true;
791
792 if (RTLLIB_QOS_HAS_SEQ(fc))
793 LLCOffset += 2;
794 if (rx_stats->bContainHTC)
795 LLCOffset += sHTCLng;
796
797 ChkLength = LLCOffset;
798
799 if (skb->len <= ChkLength)
800 return 0;
801
802 skb_pull(skb, LLCOffset);
803 ieee->bIsAggregateFrame = bIsAggregateFrame;
804 if (!bIsAggregateFrame) {
805 rxb->nr_subframes = 1;
806
807 /* altered by clark 3/30/2010
808 * The struct buffer size of the skb indicated to upper layer
809 * must be less than 5000, or the defraged IP datagram
810 * in the IP layer will exceed "ipfrag_high_tresh" and be
811 * discarded. so there must not use the function
812 * "skb_copy" and "skb_clone" for "skb".
813 */
814
815 /* Allocate new skb for releasing to upper layer */
816 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
817 if (!sub_skb)
818 return 0;
819 skb_reserve(sub_skb, 12);
820 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
821 memcpy(data_ptr, skb->data, skb->len);
822 sub_skb->dev = ieee->dev;
823
824 rxb->subframes[0] = sub_skb;
825
826 memcpy(rxb->src, src, ETH_ALEN);
827 memcpy(rxb->dst, dst, ETH_ALEN);
828 rxb->subframes[0]->dev = ieee->dev;
829 return 1;
830 }
831
832 rxb->nr_subframes = 0;
833 memcpy(rxb->src, src, ETH_ALEN);
834 memcpy(rxb->dst, dst, ETH_ALEN);
835 while (skb->len > ETHERNET_HEADER_SIZE) {
836 /* Offset 12 denote 2 mac address */
837 nSubframe_Length = *((u16 *)(skb->data + 12));
838 nSubframe_Length = (nSubframe_Length >> 8) +
839 (nSubframe_Length << 8);
840
841 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
842 netdev_info(ieee->dev,
843 "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
844 __func__, rxb->nr_subframes);
845 netdev_info(ieee->dev,
846 "%s: A-MSDU parse error!! Subframe Length: %d\n",
847 __func__, nSubframe_Length);
848 netdev_info(ieee->dev,
849 "nRemain_Length is %d and nSubframe_Length is : %d\n",
850 skb->len, nSubframe_Length);
851 netdev_info(ieee->dev,
852 "The Packet SeqNum is %d\n",
853 SeqNum);
854 return 0;
855 }
856
857 /* move the data point to data content */
858 skb_pull(skb, ETHERNET_HEADER_SIZE);
859
860 /* altered by clark 3/30/2010
861 * The struct buffer size of the skb indicated to upper layer
862 * must be less than 5000, or the defraged IP datagram
863 * in the IP layer will exceed "ipfrag_high_tresh" and be
864 * discarded. so there must not use the function
865 * "skb_copy" and "skb_clone" for "skb".
866 */
867
868 /* Allocate new skb for releasing to upper layer */
869 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
870 if (!sub_skb)
871 return 0;
872 skb_reserve(sub_skb, 12);
873 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
874 memcpy(data_ptr, skb->data, nSubframe_Length);
875
876 sub_skb->dev = ieee->dev;
877 rxb->subframes[rxb->nr_subframes++] = sub_skb;
878 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
879 netdev_dbg(ieee->dev,
880 "ParseSubframe(): Too many Subframes! Packets dropped!\n");
881 break;
882 }
883 skb_pull(skb, nSubframe_Length);
884
885 if (skb->len != 0) {
886 nPadding_Length = 4 - ((nSubframe_Length +
887 ETHERNET_HEADER_SIZE) % 4);
888 if (nPadding_Length == 4)
889 nPadding_Length = 0;
890
891 if (skb->len < nPadding_Length)
892 return 0;
893
894 skb_pull(skb, nPadding_Length);
895 }
896 }
897
898 return rxb->nr_subframes;
899 }
900
901
902 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
903 struct sk_buff *skb,
904 struct rtllib_rx_stats *rx_stats)
905 {
906 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
907 u16 fc = le16_to_cpu(hdr->frame_ctl);
908 size_t hdrlen = 0;
909
910 hdrlen = rtllib_get_hdrlen(fc);
911 if (HTCCheck(ieee, skb->data)) {
912 if (net_ratelimit())
913 netdev_info(ieee->dev, "%s: find HTCControl!\n",
914 __func__);
915 hdrlen += 4;
916 rx_stats->bContainHTC = true;
917 }
918
919 if (RTLLIB_QOS_HAS_SEQ(fc))
920 rx_stats->bIsQosData = true;
921
922 return hdrlen;
923 }
924
925 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
926 struct sk_buff *skb, u8 multicast)
927 {
928 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
929 u16 fc, sc;
930 u8 frag, type, stype;
931
932 fc = le16_to_cpu(hdr->frame_ctl);
933 type = WLAN_FC_GET_TYPE(fc);
934 stype = WLAN_FC_GET_STYPE(fc);
935 sc = le16_to_cpu(hdr->seq_ctl);
936 frag = WLAN_GET_SEQ_FRAG(sc);
937
938 if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
939 !ieee->current_network.qos_data.active ||
940 !IsDataFrame(skb->data) ||
941 IsLegacyDataFrame(skb->data)) {
942 if (!((type == RTLLIB_FTYPE_MGMT) &&
943 (stype == RTLLIB_STYPE_BEACON))) {
944 if (is_duplicate_packet(ieee, hdr))
945 return -1;
946 }
947 } else {
948 struct rx_ts_record *pRxTS = NULL;
949
950 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
951 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
952 if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
953 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum))
954 return -1;
955 pRxTS->RxLastFragNum = frag;
956 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
957 } else {
958 netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n",
959 __func__);
960 return -1;
961 }
962 }
963
964 return 0;
965 }
966
967 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
968 struct rtllib_hdr_4addr *hdr, u8 *dst,
969 u8 *src, u8 *bssid)
970 {
971 u16 fc = le16_to_cpu(hdr->frame_ctl);
972
973 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
974 case RTLLIB_FCTL_FROMDS:
975 ether_addr_copy(dst, hdr->addr1);
976 ether_addr_copy(src, hdr->addr3);
977 ether_addr_copy(bssid, hdr->addr2);
978 break;
979 case RTLLIB_FCTL_TODS:
980 ether_addr_copy(dst, hdr->addr3);
981 ether_addr_copy(src, hdr->addr2);
982 ether_addr_copy(bssid, hdr->addr1);
983 break;
984 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
985 ether_addr_copy(dst, hdr->addr3);
986 ether_addr_copy(src, hdr->addr4);
987 ether_addr_copy(bssid, ieee->current_network.bssid);
988 break;
989 case 0:
990 ether_addr_copy(dst, hdr->addr1);
991 ether_addr_copy(src, hdr->addr2);
992 ether_addr_copy(bssid, hdr->addr3);
993 break;
994 }
995 }
996
997 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
998 u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
999 {
1000 u8 type, stype;
1001
1002 type = WLAN_FC_GET_TYPE(fc);
1003 stype = WLAN_FC_GET_STYPE(fc);
1004
1005 /* Filter frames from different BSS */
1006 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
1007 !ether_addr_equal(ieee->current_network.bssid, bssid) &&
1008 !is_zero_ether_addr(ieee->current_network.bssid)) {
1009 return -1;
1010 }
1011
1012 /* Filter packets sent by an STA that will be forwarded by AP */
1013 if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
1014 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
1015 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
1016 !ether_addr_equal(dst, ieee->current_network.bssid) &&
1017 ether_addr_equal(bssid, ieee->current_network.bssid)) {
1018 return -1;
1019 }
1020 }
1021
1022 /* Nullfunc frames may have PS-bit set, so they must be passed to
1023 * hostap_handle_sta_rx() before being dropped here.
1024 */
1025 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
1026 if (stype != RTLLIB_STYPE_DATA &&
1027 stype != RTLLIB_STYPE_DATA_CFACK &&
1028 stype != RTLLIB_STYPE_DATA_CFPOLL &&
1029 stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
1030 stype != RTLLIB_STYPE_QOS_DATA) {
1031 if (stype != RTLLIB_STYPE_NULLFUNC)
1032 netdev_dbg(ieee->dev,
1033 "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
1034 type, stype);
1035 return -1;
1036 }
1037 }
1038
1039 if (ieee->iw_mode != IW_MODE_MESH) {
1040 /* packets from our adapter are dropped (echo) */
1041 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1042 return -1;
1043
1044 /* {broad,multi}cast packets to our BSS go through */
1045 if (is_multicast_ether_addr(dst)) {
1046 if (memcmp(bssid, ieee->current_network.bssid,
1047 ETH_ALEN))
1048 return -1;
1049 }
1050 }
1051 return 0;
1052 }
1053
1054 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1055 struct lib80211_crypt_data **crypt, size_t hdrlen)
1056 {
1057 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1058 u16 fc = le16_to_cpu(hdr->frame_ctl);
1059 int idx = 0;
1060
1061 if (ieee->host_decrypt) {
1062 if (skb->len >= hdrlen + 3)
1063 idx = skb->data[hdrlen + 3] >> 6;
1064
1065 *crypt = ieee->crypt_info.crypt[idx];
1066 /* allow NULL decrypt to indicate an station specific override
1067 * for default encryption
1068 */
1069 if (*crypt && ((*crypt)->ops == NULL ||
1070 (*crypt)->ops->decrypt_mpdu == NULL))
1071 *crypt = NULL;
1072
1073 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1074 /* This seems to be triggered by some (multicast?)
1075 * frames from other than current BSS, so just drop the
1076 * frames silently instead of filling system log with
1077 * these reports.
1078 */
1079 netdev_dbg(ieee->dev,
1080 "Decryption failed (not set) (SA= %pM)\n",
1081 hdr->addr2);
1082 return -1;
1083 }
1084 }
1085
1086 return 0;
1087 }
1088
1089 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1090 struct rtllib_rx_stats *rx_stats,
1091 struct lib80211_crypt_data *crypt, size_t hdrlen)
1092 {
1093 struct rtllib_hdr_4addr *hdr;
1094 int keyidx = 0;
1095 u16 fc, sc;
1096 u8 frag;
1097
1098 hdr = (struct rtllib_hdr_4addr *)skb->data;
1099 fc = le16_to_cpu(hdr->frame_ctl);
1100 sc = le16_to_cpu(hdr->seq_ctl);
1101 frag = WLAN_GET_SEQ_FRAG(sc);
1102
1103 if ((!rx_stats->Decrypted))
1104 ieee->need_sw_enc = 1;
1105 else
1106 ieee->need_sw_enc = 0;
1107
1108 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1109 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1110 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
1111 return -1;
1112 }
1113
1114 hdr = (struct rtllib_hdr_4addr *) skb->data;
1115 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1116 int flen;
1117 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1118
1119 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag);
1120
1121 if (!frag_skb) {
1122 netdev_dbg(ieee->dev,
1123 "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
1124 (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1125 WLAN_GET_SEQ_SEQ(sc), frag);
1126 return -1;
1127 }
1128 flen = skb->len;
1129 if (frag != 0)
1130 flen -= hdrlen;
1131
1132 if (frag_skb->tail + flen > frag_skb->end) {
1133 netdev_warn(ieee->dev,
1134 "%s: host decrypted and reassembled frame did not fit skb\n",
1135 __func__);
1136 rtllib_frag_cache_invalidate(ieee, hdr);
1137 return -1;
1138 }
1139
1140 if (frag == 0) {
1141 /* copy first fragment (including full headers) into
1142 * beginning of the fragment cache skb
1143 */
1144 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1145 } else {
1146 /* append frame payload to the end of the fragment
1147 * cache skb
1148 */
1149 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1150 flen);
1151 }
1152 dev_kfree_skb_any(skb);
1153 skb = NULL;
1154
1155 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1156 /* more fragments expected - leave the skb in fragment
1157 * cache for now; it will be delivered to upper layers
1158 * after all fragments have been received
1159 */
1160 return -2;
1161 }
1162
1163 /* this was the last fragment and the frame will be
1164 * delivered, so remove skb from fragment cache
1165 */
1166 skb = frag_skb;
1167 hdr = (struct rtllib_hdr_4addr *) skb->data;
1168 rtllib_frag_cache_invalidate(ieee, hdr);
1169 }
1170
1171 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1172 * encrypted/authenticated
1173 */
1174 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1175 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1176 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
1177 return -1;
1178 }
1179
1180 hdr = (struct rtllib_hdr_4addr *) skb->data;
1181 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1182 if (/*ieee->ieee802_1x &&*/
1183 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1184
1185 /* pass unencrypted EAPOL frames even if encryption is
1186 * configured
1187 */
1188 struct eapol *eap = (struct eapol *)(skb->data +
1189 24);
1190 netdev_dbg(ieee->dev,
1191 "RX: IEEE 802.1X EAPOL frame: %s\n",
1192 eap_get_type(eap->type));
1193 } else {
1194 netdev_dbg(ieee->dev,
1195 "encryption configured, but RX frame not encrypted (SA= %pM)\n",
1196 hdr->addr2);
1197 return -1;
1198 }
1199 }
1200
1201 if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1202 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1203 struct eapol *eap = (struct eapol *)(skb->data + 24);
1204 netdev_dbg(ieee->dev, "RX: IEEE 802.1X EAPOL frame: %s\n",
1205 eap_get_type(eap->type));
1206 }
1207
1208 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1209 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1210 netdev_dbg(ieee->dev,
1211 "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
1212 hdr->addr2);
1213 return -1;
1214 }
1215
1216 if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1217 netdev_warn(ieee->dev, "RX: IEEE802.1X EAPOL frame!\n");
1218
1219 return 0;
1220 }
1221
1222 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast,
1223 u8 nr_subframes)
1224 {
1225 if (unicast) {
1226
1227 if (ieee->state == RTLLIB_LINKED) {
1228 if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1229 ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1230 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1231 if (ieee->LeisurePSLeave)
1232 ieee->LeisurePSLeave(ieee->dev);
1233 }
1234 }
1235 }
1236 ieee->last_rx_ps_time = jiffies;
1237 }
1238
1239 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1240 struct rtllib_rx_stats *rx_stats,
1241 struct rtllib_rxb *rxb,
1242 u8 *dst,
1243 u8 *src)
1244 {
1245 struct net_device *dev = ieee->dev;
1246 u16 ethertype;
1247 int i = 0;
1248
1249 if (rxb == NULL) {
1250 netdev_info(dev, "%s: rxb is NULL!!\n", __func__);
1251 return;
1252 }
1253
1254 for (i = 0; i < rxb->nr_subframes; i++) {
1255 struct sk_buff *sub_skb = rxb->subframes[i];
1256
1257 if (sub_skb) {
1258 /* convert hdr + possible LLC headers
1259 * into Ethernet header
1260 */
1261 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1262 if (sub_skb->len >= 8 &&
1263 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1264 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1265 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1266 /* remove RFC1042 or Bridge-Tunnel encapsulation
1267 * and replace EtherType
1268 */
1269 skb_pull(sub_skb, SNAP_SIZE);
1270 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1271 src);
1272 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1273 dst);
1274 } else {
1275 u16 len;
1276 /* Leave Ethernet header part of hdr
1277 * and full payload
1278 */
1279 len = sub_skb->len;
1280 memcpy(skb_push(sub_skb, 2), &len, 2);
1281 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1282 src);
1283 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1284 dst);
1285 }
1286
1287 ieee->stats.rx_packets++;
1288 ieee->stats.rx_bytes += sub_skb->len;
1289
1290 if (is_multicast_ether_addr(dst))
1291 ieee->stats.multicast++;
1292
1293 /* Indicate the packets to upper layer */
1294 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1295 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1296 sub_skb->dev = dev;
1297 sub_skb->dev->stats.rx_packets++;
1298 sub_skb->dev->stats.rx_bytes += sub_skb->len;
1299 /* 802.11 crc not sufficient */
1300 sub_skb->ip_summed = CHECKSUM_NONE;
1301 netif_rx(sub_skb);
1302 }
1303 }
1304 kfree(rxb);
1305 }
1306
1307 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1308 struct rtllib_rx_stats *rx_stats)
1309 {
1310 struct net_device *dev = ieee->dev;
1311 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1312 struct lib80211_crypt_data *crypt = NULL;
1313 struct rtllib_rxb *rxb = NULL;
1314 struct rx_ts_record *pTS = NULL;
1315 u16 fc, sc, SeqNum = 0;
1316 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1317 u8 *payload;
1318 u8 dst[ETH_ALEN];
1319 u8 src[ETH_ALEN];
1320 u8 bssid[ETH_ALEN] = {0};
1321
1322 size_t hdrlen = 0;
1323 bool bToOtherSTA = false;
1324 int ret = 0, i = 0;
1325
1326 hdr = (struct rtllib_hdr_4addr *)skb->data;
1327 fc = le16_to_cpu(hdr->frame_ctl);
1328 type = WLAN_FC_GET_TYPE(fc);
1329 stype = WLAN_FC_GET_STYPE(fc);
1330 sc = le16_to_cpu(hdr->seq_ctl);
1331
1332 /*Filter pkt not to me*/
1333 multicast = is_multicast_ether_addr(hdr->addr1);
1334 unicast = !multicast;
1335 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1336 if (ieee->bNetPromiscuousMode)
1337 bToOtherSTA = true;
1338 else
1339 goto rx_dropped;
1340 }
1341
1342 /*Filter pkt has too small length */
1343 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1344 if (skb->len < hdrlen) {
1345 netdev_info(dev,
1346 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1347 __func__);
1348 goto rx_dropped;
1349 }
1350
1351 /* Filter Duplicate pkt */
1352 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1353 if (ret < 0)
1354 goto rx_dropped;
1355
1356 /* Filter CTRL Frame */
1357 if (type == RTLLIB_FTYPE_CTL)
1358 goto rx_dropped;
1359
1360 /* Filter MGNT Frame */
1361 if (type == RTLLIB_FTYPE_MGMT) {
1362 if (bToOtherSTA)
1363 goto rx_dropped;
1364 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1365 goto rx_dropped;
1366 else
1367 goto rx_exit;
1368 }
1369
1370 /* Filter WAPI DATA Frame */
1371
1372 /* Update statstics for AP roaming */
1373 if (!bToOtherSTA) {
1374 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1375 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1376 }
1377 dev->last_rx = jiffies;
1378
1379 /* Data frame - extract src/dst addresses */
1380 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1381
1382 /* Filter Data frames */
1383 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1384 if (ret < 0)
1385 goto rx_dropped;
1386
1387 if (skb->len == hdrlen)
1388 goto rx_dropped;
1389
1390 /* Send pspoll based on moredata */
1391 if ((ieee->iw_mode == IW_MODE_INFRA) &&
1392 (ieee->sta_sleep == LPS_IS_SLEEP) &&
1393 (ieee->polling) && (!bToOtherSTA)) {
1394 if (WLAN_FC_MORE_DATA(fc)) {
1395 /* more data bit is set, let's request a new frame
1396 * from the AP
1397 */
1398 rtllib_sta_ps_send_pspoll_frame(ieee);
1399 } else {
1400 ieee->polling = false;
1401 }
1402 }
1403
1404 /* Get crypt if encrypted */
1405 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1406 if (ret == -1)
1407 goto rx_dropped;
1408
1409 /* Decrypt data frame (including reassemble) */
1410 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1411 if (ret == -1)
1412 goto rx_dropped;
1413 else if (ret == -2)
1414 goto rx_exit;
1415
1416 /* Get TS for Rx Reorder */
1417 hdr = (struct rtllib_hdr_4addr *) skb->data;
1418 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1419 && !is_multicast_ether_addr(hdr->addr1)
1420 && (!bToOtherSTA)) {
1421 TID = Frame_QoSTID(skb->data);
1422 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1423 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID,
1424 RX_DIR, true);
1425 if (TID != 0 && TID != 3)
1426 ieee->bis_any_nonbepkts = true;
1427 }
1428
1429 /* Parse rx data frame (For AMSDU) */
1430 /* skb: hdr + (possible reassembled) full plaintext payload */
1431 payload = skb->data + hdrlen;
1432 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1433 if (rxb == NULL)
1434 goto rx_dropped;
1435
1436 /* to parse amsdu packets */
1437 /* qos data packets & reserved bit is 1 */
1438 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1439 /* only to free rxb, and not submit the packets
1440 * to upper layer
1441 */
1442 for (i = 0; i < rxb->nr_subframes; i++)
1443 dev_kfree_skb(rxb->subframes[i]);
1444 kfree(rxb);
1445 rxb = NULL;
1446 goto rx_dropped;
1447 }
1448
1449 /* Update WAPI PN */
1450
1451 /* Check if leave LPS */
1452 if (!bToOtherSTA) {
1453 if (ieee->bIsAggregateFrame)
1454 nr_subframes = rxb->nr_subframes;
1455 else
1456 nr_subframes = 1;
1457 if (unicast)
1458 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1459 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1460 }
1461
1462 /* Indicate packets to upper layer or Rx Reorder */
1463 if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL ||
1464 bToOtherSTA)
1465 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1466 else
1467 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1468
1469 dev_kfree_skb(skb);
1470
1471 rx_exit:
1472 return 1;
1473
1474 rx_dropped:
1475 ieee->stats.rx_dropped++;
1476
1477 /* Returning 0 indicates to caller that we have not handled the SKB--
1478 * so it is still allocated and can be used again by underlying
1479 * hardware as a DMA target
1480 */
1481 return 0;
1482 }
1483
1484 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1485 struct rtllib_rx_stats *rx_stats)
1486 {
1487 return 0;
1488 }
1489
1490 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1491 struct rtllib_rx_stats *rx_stats)
1492 {
1493 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1494 u16 fc = le16_to_cpu(hdr->frame_ctl);
1495 size_t hdrlen = rtllib_get_hdrlen(fc);
1496
1497 if (skb->len < hdrlen) {
1498 netdev_info(ieee->dev,
1499 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1500 __func__);
1501 return 0;
1502 }
1503
1504 if (HTCCheck(ieee, skb->data)) {
1505 if (net_ratelimit())
1506 netdev_info(ieee->dev, "%s: Find HTCControl!\n",
1507 __func__);
1508 hdrlen += 4;
1509 }
1510
1511 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1512 ieee->stats.rx_packets++;
1513 ieee->stats.rx_bytes += skb->len;
1514
1515 return 1;
1516 }
1517
1518 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1519 struct rtllib_rx_stats *rx_stats)
1520 {
1521 return 0;
1522 }
1523
1524 /* All received frames are sent to this function. @skb contains the frame in
1525 * IEEE 802.11 format, i.e., in the format it was sent over air.
1526 * This function is called only as a tasklet (software IRQ).
1527 */
1528 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1529 struct rtllib_rx_stats *rx_stats)
1530 {
1531 int ret = 0;
1532
1533 if (!ieee || !skb || !rx_stats) {
1534 pr_info("%s: Input parameters NULL!\n", __func__);
1535 goto rx_dropped;
1536 }
1537 if (skb->len < 10) {
1538 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
1539 goto rx_dropped;
1540 }
1541
1542 switch (ieee->iw_mode) {
1543 case IW_MODE_ADHOC:
1544 case IW_MODE_INFRA:
1545 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1546 break;
1547 case IW_MODE_MASTER:
1548 case IW_MODE_REPEAT:
1549 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1550 break;
1551 case IW_MODE_MONITOR:
1552 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1553 break;
1554 case IW_MODE_MESH:
1555 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1556 break;
1557 default:
1558 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
1559 break;
1560 }
1561
1562 return ret;
1563
1564 rx_dropped:
1565 if (ieee)
1566 ieee->stats.rx_dropped++;
1567 return 0;
1568 }
1569 EXPORT_SYMBOL(rtllib_rx);
1570
1571 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1572
1573 /* Make ther structure we read from the beacon packet has the right values */
1574 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1575 *info_element, int sub_type)
1576 {
1577
1578 if (info_element->qui_subtype != sub_type)
1579 return -1;
1580 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1581 return -1;
1582 if (info_element->qui_type != QOS_OUI_TYPE)
1583 return -1;
1584 if (info_element->version != QOS_VERSION_1)
1585 return -1;
1586
1587 return 0;
1588 }
1589
1590
1591 /* Parse a QoS parameter element */
1592 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1593 *element_param,
1594 struct rtllib_info_element
1595 *info_element)
1596 {
1597 int ret = 0;
1598 u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1599
1600 if ((info_element == NULL) || (element_param == NULL))
1601 return -1;
1602
1603 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1604 memcpy(element_param->info_element.qui, info_element->data,
1605 info_element->len);
1606 element_param->info_element.elementID = info_element->id;
1607 element_param->info_element.length = info_element->len;
1608 } else
1609 ret = -1;
1610 if (ret == 0)
1611 ret = rtllib_verify_qos_info(&element_param->info_element,
1612 QOS_OUI_PARAM_SUB_TYPE);
1613 return ret;
1614 }
1615
1616 /* Parse a QoS information element */
1617 static int rtllib_read_qos_info_element(struct rtllib_qos_information_element
1618 *element_info,
1619 struct rtllib_info_element
1620 *info_element)
1621 {
1622 int ret = 0;
1623 u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1624
1625 if (element_info == NULL)
1626 return -1;
1627 if (info_element == NULL)
1628 return -1;
1629
1630 if ((info_element->id == QOS_ELEMENT_ID) &&
1631 (info_element->len == size)) {
1632 memcpy(element_info->qui, info_element->data,
1633 info_element->len);
1634 element_info->elementID = info_element->id;
1635 element_info->length = info_element->len;
1636 } else
1637 ret = -1;
1638
1639 if (ret == 0)
1640 ret = rtllib_verify_qos_info(element_info,
1641 QOS_OUI_INFO_SUB_TYPE);
1642 return ret;
1643 }
1644
1645
1646 /* Write QoS parameters from the ac parameters. */
1647 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1648 struct rtllib_qos_data *qos_data)
1649 {
1650 struct rtllib_qos_ac_parameter *ac_params;
1651 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1652 int i;
1653 u8 aci;
1654 u8 acm;
1655
1656 qos_data->wmm_acm = 0;
1657 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1658 ac_params = &(param_elm->ac_params_record[i]);
1659
1660 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1661 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1662
1663 if (aci >= QOS_QUEUE_NUM)
1664 continue;
1665 switch (aci) {
1666 case 1:
1667 /* BIT(0) | BIT(3) */
1668 if (acm)
1669 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1670 break;
1671 case 2:
1672 /* BIT(4) | BIT(5) */
1673 if (acm)
1674 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1675 break;
1676 case 3:
1677 /* BIT(6) | BIT(7) */
1678 if (acm)
1679 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1680 break;
1681 case 0:
1682 default:
1683 /* BIT(1) | BIT(2) */
1684 if (acm)
1685 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1686 break;
1687 }
1688
1689 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1690
1691 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1692 qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2);
1693
1694 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max &
1695 0x0F);
1696
1697 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max &
1698 0xF0) >> 4);
1699
1700 qos_param->flag[aci] =
1701 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1702 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1703 }
1704 return 0;
1705 }
1706
1707 /* we have a generic data element which it may contain QoS information or
1708 * parameters element. check the information element length to decide
1709 * which type to read
1710 */
1711 static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee,
1712 struct rtllib_info_element
1713 *info_element,
1714 struct rtllib_network *network)
1715 {
1716 int rc = 0;
1717 struct rtllib_qos_information_element qos_info_element;
1718
1719 rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1720
1721 if (rc == 0) {
1722 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1723 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1724 } else {
1725 struct rtllib_qos_parameter_info param_element;
1726
1727 rc = rtllib_read_qos_param_element(&param_element,
1728 info_element);
1729 if (rc == 0) {
1730 rtllib_qos_convert_ac_to_parameters(&param_element,
1731 &(network->qos_data));
1732 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1733 network->qos_data.param_count =
1734 param_element.info_element.ac_info & 0x0F;
1735 }
1736 }
1737
1738 if (rc == 0) {
1739 netdev_dbg(ieee->dev, "QoS is supported\n");
1740 network->qos_data.supported = 1;
1741 }
1742 return rc;
1743 }
1744
1745 static const char *get_info_element_string(u16 id)
1746 {
1747 switch (id) {
1748 case MFIE_TYPE_SSID:
1749 return "SSID";
1750 case MFIE_TYPE_RATES:
1751 return "RATES";
1752 case MFIE_TYPE_FH_SET:
1753 return "FH_SET";
1754 case MFIE_TYPE_DS_SET:
1755 return "DS_SET";
1756 case MFIE_TYPE_CF_SET:
1757 return "CF_SET";
1758 case MFIE_TYPE_TIM:
1759 return "TIM";
1760 case MFIE_TYPE_IBSS_SET:
1761 return "IBSS_SET";
1762 case MFIE_TYPE_COUNTRY:
1763 return "COUNTRY";
1764 case MFIE_TYPE_HOP_PARAMS:
1765 return "HOP_PARAMS";
1766 case MFIE_TYPE_HOP_TABLE:
1767 return "HOP_TABLE";
1768 case MFIE_TYPE_REQUEST:
1769 return "REQUEST";
1770 case MFIE_TYPE_CHALLENGE:
1771 return "CHALLENGE";
1772 case MFIE_TYPE_POWER_CONSTRAINT:
1773 return "POWER_CONSTRAINT";
1774 case MFIE_TYPE_POWER_CAPABILITY:
1775 return "POWER_CAPABILITY";
1776 case MFIE_TYPE_TPC_REQUEST:
1777 return "TPC_REQUEST";
1778 case MFIE_TYPE_TPC_REPORT:
1779 return "TPC_REPORT";
1780 case MFIE_TYPE_SUPP_CHANNELS:
1781 return "SUPP_CHANNELS";
1782 case MFIE_TYPE_CSA:
1783 return "CSA";
1784 case MFIE_TYPE_MEASURE_REQUEST:
1785 return "MEASURE_REQUEST";
1786 case MFIE_TYPE_MEASURE_REPORT:
1787 return "MEASURE_REPORT";
1788 case MFIE_TYPE_QUIET:
1789 return "QUIET";
1790 case MFIE_TYPE_IBSS_DFS:
1791 return "IBSS_DFS";
1792 case MFIE_TYPE_RSN:
1793 return "RSN";
1794 case MFIE_TYPE_RATES_EX:
1795 return "RATES_EX";
1796 case MFIE_TYPE_GENERIC:
1797 return "GENERIC";
1798 case MFIE_TYPE_QOS_PARAMETER:
1799 return "QOS_PARAMETER";
1800 default:
1801 return "UNKNOWN";
1802 }
1803 }
1804
1805 static inline void rtllib_extract_country_ie(
1806 struct rtllib_device *ieee,
1807 struct rtllib_info_element *info_element,
1808 struct rtllib_network *network,
1809 u8 *addr2)
1810 {
1811 if (IS_DOT11D_ENABLE(ieee)) {
1812 if (info_element->len != 0) {
1813 memcpy(network->CountryIeBuf, info_element->data,
1814 info_element->len);
1815 network->CountryIeLen = info_element->len;
1816
1817 if (!IS_COUNTRY_IE_VALID(ieee)) {
1818 if (rtllib_act_scanning(ieee, false) &&
1819 ieee->FirstIe_InScan)
1820 netdev_info(ieee->dev,
1821 "Received beacon ContryIE, SSID: <%s>\n",
1822 network->ssid);
1823 Dot11d_UpdateCountryIe(ieee, addr2,
1824 info_element->len,
1825 info_element->data);
1826 }
1827 }
1828
1829 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1830 UPDATE_CIE_WATCHDOG(ieee);
1831 }
1832
1833 }
1834
1835 static void rtllib_parse_mife_generic(struct rtllib_device *ieee,
1836 struct rtllib_info_element *info_element,
1837 struct rtllib_network *network,
1838 u16 *tmp_htcap_len,
1839 u16 *tmp_htinfo_len)
1840 {
1841 u16 ht_realtek_agg_len = 0;
1842 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1843
1844 if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network))
1845 return;
1846 if (info_element->len >= 4 &&
1847 info_element->data[0] == 0x00 &&
1848 info_element->data[1] == 0x50 &&
1849 info_element->data[2] == 0xf2 &&
1850 info_element->data[3] == 0x01) {
1851 network->wpa_ie_len = min(info_element->len + 2,
1852 MAX_WPA_IE_LEN);
1853 memcpy(network->wpa_ie, info_element, network->wpa_ie_len);
1854 return;
1855 }
1856 if (info_element->len == 7 &&
1857 info_element->data[0] == 0x00 &&
1858 info_element->data[1] == 0xe0 &&
1859 info_element->data[2] == 0x4c &&
1860 info_element->data[3] == 0x01 &&
1861 info_element->data[4] == 0x02)
1862 network->Turbo_Enable = 1;
1863
1864 if (*tmp_htcap_len == 0) {
1865 if (info_element->len >= 4 &&
1866 info_element->data[0] == 0x00 &&
1867 info_element->data[1] == 0x90 &&
1868 info_element->data[2] == 0x4c &&
1869 info_element->data[3] == 0x033) {
1870 *tmp_htcap_len = min_t(u8, info_element->len,
1871 MAX_IE_LEN);
1872 if (*tmp_htcap_len != 0) {
1873 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1874 network->bssht.bdHTCapLen = min_t(u16, *tmp_htcap_len, sizeof(network->bssht.bdHTCapBuf));
1875 memcpy(network->bssht.bdHTCapBuf,
1876 info_element->data,
1877 network->bssht.bdHTCapLen);
1878 }
1879 }
1880 if (*tmp_htcap_len != 0) {
1881 network->bssht.bdSupportHT = true;
1882 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1883 } else {
1884 network->bssht.bdSupportHT = false;
1885 network->bssht.bdHT1R = false;
1886 }
1887 }
1888
1889
1890 if (*tmp_htinfo_len == 0) {
1891 if (info_element->len >= 4 &&
1892 info_element->data[0] == 0x00 &&
1893 info_element->data[1] == 0x90 &&
1894 info_element->data[2] == 0x4c &&
1895 info_element->data[3] == 0x034) {
1896 *tmp_htinfo_len = min_t(u8, info_element->len,
1897 MAX_IE_LEN);
1898 if (*tmp_htinfo_len != 0) {
1899 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1900 network->bssht.bdHTInfoLen = min_t(u16, *tmp_htinfo_len, sizeof(network->bssht.bdHTInfoBuf));
1901 memcpy(network->bssht.bdHTInfoBuf,
1902 info_element->data,
1903 network->bssht.bdHTInfoLen);
1904 }
1905
1906 }
1907 }
1908
1909 if (network->bssht.bdSupportHT) {
1910 if (info_element->len >= 4 &&
1911 info_element->data[0] == 0x00 &&
1912 info_element->data[1] == 0xe0 &&
1913 info_element->data[2] == 0x4c &&
1914 info_element->data[3] == 0x02) {
1915 ht_realtek_agg_len = min_t(u8, info_element->len,
1916 MAX_IE_LEN);
1917 memcpy(ht_realtek_agg_buf, info_element->data,
1918 info_element->len);
1919 }
1920 if (ht_realtek_agg_len >= 5) {
1921 network->realtek_cap_exit = true;
1922 network->bssht.bdRT2RTAggregation = true;
1923
1924 if ((ht_realtek_agg_buf[4] == 1) &&
1925 (ht_realtek_agg_buf[5] & 0x02))
1926 network->bssht.bdRT2RTLongSlotTime = true;
1927
1928 if ((ht_realtek_agg_buf[4] == 1) &&
1929 (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1930 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1931 }
1932 }
1933 if (ht_realtek_agg_len >= 5) {
1934 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1935 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1936 }
1937
1938 if ((info_element->len >= 3 &&
1939 info_element->data[0] == 0x00 &&
1940 info_element->data[1] == 0x05 &&
1941 info_element->data[2] == 0xb5) ||
1942 (info_element->len >= 3 &&
1943 info_element->data[0] == 0x00 &&
1944 info_element->data[1] == 0x0a &&
1945 info_element->data[2] == 0xf7) ||
1946 (info_element->len >= 3 &&
1947 info_element->data[0] == 0x00 &&
1948 info_element->data[1] == 0x10 &&
1949 info_element->data[2] == 0x18)) {
1950 network->broadcom_cap_exist = true;
1951 }
1952 if (info_element->len >= 3 &&
1953 info_element->data[0] == 0x00 &&
1954 info_element->data[1] == 0x0c &&
1955 info_element->data[2] == 0x43)
1956 network->ralink_cap_exist = true;
1957 if ((info_element->len >= 3 &&
1958 info_element->data[0] == 0x00 &&
1959 info_element->data[1] == 0x03 &&
1960 info_element->data[2] == 0x7f) ||
1961 (info_element->len >= 3 &&
1962 info_element->data[0] == 0x00 &&
1963 info_element->data[1] == 0x13 &&
1964 info_element->data[2] == 0x74))
1965 network->atheros_cap_exist = true;
1966
1967 if ((info_element->len >= 3 &&
1968 info_element->data[0] == 0x00 &&
1969 info_element->data[1] == 0x50 &&
1970 info_element->data[2] == 0x43))
1971 network->marvell_cap_exist = true;
1972 if (info_element->len >= 3 &&
1973 info_element->data[0] == 0x00 &&
1974 info_element->data[1] == 0x40 &&
1975 info_element->data[2] == 0x96)
1976 network->cisco_cap_exist = true;
1977
1978
1979 if (info_element->len >= 3 &&
1980 info_element->data[0] == 0x00 &&
1981 info_element->data[1] == 0x0a &&
1982 info_element->data[2] == 0xf5)
1983 network->airgo_cap_exist = true;
1984
1985 if (info_element->len > 4 &&
1986 info_element->data[0] == 0x00 &&
1987 info_element->data[1] == 0x40 &&
1988 info_element->data[2] == 0x96 &&
1989 info_element->data[3] == 0x01) {
1990 if (info_element->len == 6) {
1991 memcpy(network->CcxRmState, &info_element[4], 2);
1992 if (network->CcxRmState[0] != 0)
1993 network->bCcxRmEnable = true;
1994 else
1995 network->bCcxRmEnable = false;
1996 network->MBssidMask = network->CcxRmState[1] & 0x07;
1997 if (network->MBssidMask != 0) {
1998 network->bMBssidValid = true;
1999 network->MBssidMask = 0xff <<
2000 (network->MBssidMask);
2001 ether_addr_copy(network->MBssid,
2002 network->bssid);
2003 network->MBssid[5] &= network->MBssidMask;
2004 } else {
2005 network->bMBssidValid = false;
2006 }
2007 } else {
2008 network->bCcxRmEnable = false;
2009 }
2010 }
2011 if (info_element->len > 4 &&
2012 info_element->data[0] == 0x00 &&
2013 info_element->data[1] == 0x40 &&
2014 info_element->data[2] == 0x96 &&
2015 info_element->data[3] == 0x03) {
2016 if (info_element->len == 5) {
2017 network->bWithCcxVerNum = true;
2018 network->BssCcxVerNumber = info_element->data[4];
2019 } else {
2020 network->bWithCcxVerNum = false;
2021 network->BssCcxVerNumber = 0;
2022 }
2023 }
2024 if (info_element->len > 4 &&
2025 info_element->data[0] == 0x00 &&
2026 info_element->data[1] == 0x50 &&
2027 info_element->data[2] == 0xf2 &&
2028 info_element->data[3] == 0x04) {
2029 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n",
2030 info_element->len);
2031 network->wzc_ie_len = min(info_element->len+2, MAX_WZC_IE_LEN);
2032 memcpy(network->wzc_ie, info_element, network->wzc_ie_len);
2033 }
2034 }
2035
2036 static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element,
2037 struct rtllib_network *network,
2038 u16 *tmp_htcap_len)
2039 {
2040 struct bss_ht *ht = &network->bssht;
2041
2042 *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
2043 if (*tmp_htcap_len != 0) {
2044 ht->bdHTSpecVer = HT_SPEC_VER_EWC;
2045 ht->bdHTCapLen = min_t(u16, *tmp_htcap_len,
2046 sizeof(ht->bdHTCapBuf));
2047 memcpy(ht->bdHTCapBuf, info_element->data, ht->bdHTCapLen);
2048
2049 ht->bdSupportHT = true;
2050 ht->bdHT1R = ((((struct ht_capab_ele *)
2051 ht->bdHTCapBuf))->MCS[1]) == 0;
2052
2053 ht->bdBandWidth = (enum ht_channel_width)
2054 (((struct ht_capab_ele *)
2055 (ht->bdHTCapBuf))->ChlWidth);
2056 } else {
2057 ht->bdSupportHT = false;
2058 ht->bdHT1R = false;
2059 ht->bdBandWidth = HT_CHANNEL_WIDTH_20;
2060 }
2061 }
2062
2063 int rtllib_parse_info_param(struct rtllib_device *ieee,
2064 struct rtllib_info_element *info_element,
2065 u16 length,
2066 struct rtllib_network *network,
2067 struct rtllib_rx_stats *stats)
2068 {
2069 u8 i;
2070 short offset;
2071 u16 tmp_htcap_len = 0;
2072 u16 tmp_htinfo_len = 0;
2073 char rates_str[64];
2074 char *p;
2075
2076 while (length >= sizeof(*info_element)) {
2077 if (sizeof(*info_element) + info_element->len > length) {
2078 netdev_dbg(ieee->dev,
2079 "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
2080 info_element->len + sizeof(*info_element),
2081 length, info_element->id);
2082 /* We stop processing but don't return an error here
2083 * because some misbehaviour APs break this rule. ie.
2084 * Orinoco AP1000.
2085 */
2086 break;
2087 }
2088
2089 switch (info_element->id) {
2090 case MFIE_TYPE_SSID:
2091 if (rtllib_is_empty_essid(info_element->data,
2092 info_element->len)) {
2093 network->flags |= NETWORK_EMPTY_ESSID;
2094 break;
2095 }
2096
2097 network->ssid_len = min(info_element->len,
2098 (u8) IW_ESSID_MAX_SIZE);
2099 memcpy(network->ssid, info_element->data,
2100 network->ssid_len);
2101 if (network->ssid_len < IW_ESSID_MAX_SIZE)
2102 memset(network->ssid + network->ssid_len, 0,
2103 IW_ESSID_MAX_SIZE - network->ssid_len);
2104
2105 netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n",
2106 network->ssid, network->ssid_len);
2107 break;
2108
2109 case MFIE_TYPE_RATES:
2110 p = rates_str;
2111 network->rates_len = min(info_element->len,
2112 MAX_RATES_LENGTH);
2113 for (i = 0; i < network->rates_len; i++) {
2114 network->rates[i] = info_element->data[i];
2115 p += snprintf(p, sizeof(rates_str) -
2116 (p - rates_str), "%02X ",
2117 network->rates[i]);
2118 if (rtllib_is_ofdm_rate
2119 (info_element->data[i])) {
2120 network->flags |= NETWORK_HAS_OFDM;
2121 if (info_element->data[i] &
2122 RTLLIB_BASIC_RATE_MASK)
2123 network->flags &=
2124 ~NETWORK_HAS_CCK;
2125 }
2126
2127 if (rtllib_is_cck_rate
2128 (info_element->data[i])) {
2129 network->flags |= NETWORK_HAS_CCK;
2130 }
2131 }
2132
2133 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n",
2134 rates_str, network->rates_len);
2135 break;
2136
2137 case MFIE_TYPE_RATES_EX:
2138 p = rates_str;
2139 network->rates_ex_len = min(info_element->len,
2140 MAX_RATES_EX_LENGTH);
2141 for (i = 0; i < network->rates_ex_len; i++) {
2142 network->rates_ex[i] = info_element->data[i];
2143 p += snprintf(p, sizeof(rates_str) -
2144 (p - rates_str), "%02X ",
2145 network->rates_ex[i]);
2146 if (rtllib_is_ofdm_rate
2147 (info_element->data[i])) {
2148 network->flags |= NETWORK_HAS_OFDM;
2149 if (info_element->data[i] &
2150 RTLLIB_BASIC_RATE_MASK)
2151 network->flags &=
2152 ~NETWORK_HAS_CCK;
2153 }
2154 }
2155
2156 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n",
2157 rates_str, network->rates_ex_len);
2158 break;
2159
2160 case MFIE_TYPE_DS_SET:
2161 netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n",
2162 info_element->data[0]);
2163 network->channel = info_element->data[0];
2164 break;
2165
2166 case MFIE_TYPE_FH_SET:
2167 netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n");
2168 break;
2169
2170 case MFIE_TYPE_CF_SET:
2171 netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n");
2172 break;
2173
2174 case MFIE_TYPE_TIM:
2175 if (info_element->len < 4)
2176 break;
2177
2178 network->tim.tim_count = info_element->data[0];
2179 network->tim.tim_period = info_element->data[1];
2180
2181 network->dtim_period = info_element->data[1];
2182 if (ieee->state != RTLLIB_LINKED)
2183 break;
2184 network->last_dtim_sta_time = jiffies;
2185
2186 network->dtim_data = RTLLIB_DTIM_VALID;
2187
2188
2189 if (info_element->data[2] & 1)
2190 network->dtim_data |= RTLLIB_DTIM_MBCAST;
2191
2192 offset = (info_element->data[2] >> 1)*2;
2193
2194
2195 if (ieee->assoc_id < 8*offset ||
2196 ieee->assoc_id > 8*(offset + info_element->len - 3))
2197 break;
2198
2199 offset = (ieee->assoc_id / 8) - offset;
2200 if (info_element->data[3 + offset] &
2201 (1 << (ieee->assoc_id % 8)))
2202 network->dtim_data |= RTLLIB_DTIM_UCAST;
2203
2204 network->listen_interval = network->dtim_period;
2205 break;
2206
2207 case MFIE_TYPE_ERP:
2208 network->erp_value = info_element->data[0];
2209 network->flags |= NETWORK_HAS_ERP_VALUE;
2210 netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n",
2211 network->erp_value);
2212 break;
2213 case MFIE_TYPE_IBSS_SET:
2214 network->atim_window = info_element->data[0];
2215 netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n",
2216 network->atim_window);
2217 break;
2218
2219 case MFIE_TYPE_CHALLENGE:
2220 netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n");
2221 break;
2222
2223 case MFIE_TYPE_GENERIC:
2224 netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n",
2225 info_element->len);
2226
2227 rtllib_parse_mife_generic(ieee, info_element, network,
2228 &tmp_htcap_len,
2229 &tmp_htinfo_len);
2230 break;
2231
2232 case MFIE_TYPE_RSN:
2233 netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n",
2234 info_element->len);
2235 network->rsn_ie_len = min(info_element->len + 2,
2236 MAX_WPA_IE_LEN);
2237 memcpy(network->rsn_ie, info_element,
2238 network->rsn_ie_len);
2239 break;
2240
2241 case MFIE_TYPE_HT_CAP:
2242 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n",
2243 info_element->len);
2244
2245 rtllib_parse_mfie_ht_cap(info_element, network,
2246 &tmp_htcap_len);
2247 break;
2248
2249
2250 case MFIE_TYPE_HT_INFO:
2251 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n",
2252 info_element->len);
2253 tmp_htinfo_len = min_t(u8, info_element->len,
2254 MAX_IE_LEN);
2255 if (tmp_htinfo_len) {
2256 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2257 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2258 sizeof(network->bssht.bdHTInfoBuf) ?
2259 sizeof(network->bssht.bdHTInfoBuf) :
2260 tmp_htinfo_len;
2261 memcpy(network->bssht.bdHTInfoBuf,
2262 info_element->data,
2263 network->bssht.bdHTInfoLen);
2264 }
2265 break;
2266
2267 case MFIE_TYPE_AIRONET:
2268 netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n",
2269 info_element->len);
2270 if (info_element->len > IE_CISCO_FLAG_POSITION) {
2271 network->bWithAironetIE = true;
2272
2273 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2274 & SUPPORT_CKIP_MIC) ||
2275 (info_element->data[IE_CISCO_FLAG_POSITION]
2276 & SUPPORT_CKIP_PK))
2277 network->bCkipSupported = true;
2278 else
2279 network->bCkipSupported = false;
2280 } else {
2281 network->bWithAironetIE = false;
2282 network->bCkipSupported = false;
2283 }
2284 break;
2285 case MFIE_TYPE_QOS_PARAMETER:
2286 netdev_err(ieee->dev,
2287 "QoS Error need to parse QOS_PARAMETER IE\n");
2288 break;
2289
2290 case MFIE_TYPE_COUNTRY:
2291 netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n",
2292 info_element->len);
2293 rtllib_extract_country_ie(ieee, info_element, network,
2294 network->bssid);
2295 break;
2296 /* TODO */
2297 default:
2298 netdev_dbg(ieee->dev,
2299 "Unsupported info element: %s (%d)\n",
2300 get_info_element_string(info_element->id),
2301 info_element->id);
2302 break;
2303 }
2304
2305 length -= sizeof(*info_element) + info_element->len;
2306 info_element =
2307 (struct rtllib_info_element *)&info_element->
2308 data[info_element->len];
2309 }
2310
2311 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2312 !network->cisco_cap_exist && !network->ralink_cap_exist &&
2313 !network->bssht.bdRT2RTAggregation)
2314 network->unknown_cap_exist = true;
2315 else
2316 network->unknown_cap_exist = false;
2317 return 0;
2318 }
2319
2320 static long rtllib_translate_todbm(u8 signal_strength_index)
2321 {
2322 long signal_power;
2323
2324 signal_power = (long)((signal_strength_index + 1) >> 1);
2325 signal_power -= 95;
2326
2327 return signal_power;
2328 }
2329
2330 static inline int rtllib_network_init(
2331 struct rtllib_device *ieee,
2332 struct rtllib_probe_response *beacon,
2333 struct rtllib_network *network,
2334 struct rtllib_rx_stats *stats)
2335 {
2336 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2337
2338 /* Pull out fixed field data */
2339 ether_addr_copy(network->bssid, beacon->header.addr3);
2340 network->capability = le16_to_cpu(beacon->capability);
2341 network->last_scanned = jiffies;
2342 network->time_stamp[0] = beacon->time_stamp[0];
2343 network->time_stamp[1] = beacon->time_stamp[1];
2344 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2345 /* Where to pull this? beacon->listen_interval;*/
2346 network->listen_interval = 0x0A;
2347 network->rates_len = network->rates_ex_len = 0;
2348 network->ssid_len = 0;
2349 network->hidden_ssid_len = 0;
2350 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2351 network->flags = 0;
2352 network->atim_window = 0;
2353 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2354 0x3 : 0x0;
2355 network->berp_info_valid = false;
2356 network->broadcom_cap_exist = false;
2357 network->ralink_cap_exist = false;
2358 network->atheros_cap_exist = false;
2359 network->cisco_cap_exist = false;
2360 network->unknown_cap_exist = false;
2361 network->realtek_cap_exit = false;
2362 network->marvell_cap_exist = false;
2363 network->airgo_cap_exist = false;
2364 network->Turbo_Enable = 0;
2365 network->SignalStrength = stats->SignalStrength;
2366 network->RSSI = stats->SignalStrength;
2367 network->CountryIeLen = 0;
2368 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2369 HTInitializeBssDesc(&network->bssht);
2370 if (stats->freq == RTLLIB_52GHZ_BAND) {
2371 /* for A band (No DS info) */
2372 network->channel = stats->received_channel;
2373 } else
2374 network->flags |= NETWORK_HAS_CCK;
2375
2376 network->wpa_ie_len = 0;
2377 network->rsn_ie_len = 0;
2378 network->wzc_ie_len = 0;
2379
2380 if (rtllib_parse_info_param(ieee,
2381 beacon->info_element,
2382 (stats->len - sizeof(*beacon)),
2383 network,
2384 stats))
2385 return 1;
2386
2387 network->mode = 0;
2388 if (stats->freq == RTLLIB_52GHZ_BAND)
2389 network->mode = IEEE_A;
2390 else {
2391 if (network->flags & NETWORK_HAS_OFDM)
2392 network->mode |= IEEE_G;
2393 if (network->flags & NETWORK_HAS_CCK)
2394 network->mode |= IEEE_B;
2395 }
2396
2397 if (network->mode == 0) {
2398 netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n",
2399 escape_essid(network->ssid, network->ssid_len),
2400 network->bssid);
2401 return 1;
2402 }
2403
2404 if (network->bssht.bdSupportHT) {
2405 if (network->mode == IEEE_A)
2406 network->mode = IEEE_N_5G;
2407 else if (network->mode & (IEEE_G | IEEE_B))
2408 network->mode = IEEE_N_24G;
2409 }
2410 if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2411 network->flags |= NETWORK_EMPTY_ESSID;
2412 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2413 stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2414
2415 memcpy(&network->stats, stats, sizeof(network->stats));
2416
2417 return 0;
2418 }
2419
2420 static inline int is_same_network(struct rtllib_network *src,
2421 struct rtllib_network *dst, u8 ssidbroad)
2422 {
2423 /* A network is only a duplicate if the channel, BSSID, ESSID
2424 * and the capability field (in particular IBSS and BSS) all match.
2425 * We treat all <hidden> with the same BSSID and channel
2426 * as one network
2427 */
2428 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2429 (src->channel == dst->channel) &&
2430 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2431 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2432 (!ssidbroad)) &&
2433 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2434 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2435 ((src->capability & WLAN_CAPABILITY_ESS) ==
2436 (dst->capability & WLAN_CAPABILITY_ESS)));
2437 }
2438
2439
2440 static inline void update_network(struct rtllib_device *ieee,
2441 struct rtllib_network *dst,
2442 struct rtllib_network *src)
2443 {
2444 int qos_active;
2445 u8 old_param;
2446
2447 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2448 dst->capability = src->capability;
2449 memcpy(dst->rates, src->rates, src->rates_len);
2450 dst->rates_len = src->rates_len;
2451 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2452 dst->rates_ex_len = src->rates_ex_len;
2453 if (src->ssid_len > 0) {
2454 if (dst->ssid_len == 0) {
2455 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2456 dst->hidden_ssid_len = src->ssid_len;
2457 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2458 } else {
2459 memset(dst->ssid, 0, dst->ssid_len);
2460 dst->ssid_len = src->ssid_len;
2461 memcpy(dst->ssid, src->ssid, src->ssid_len);
2462 }
2463 }
2464 dst->mode = src->mode;
2465 dst->flags = src->flags;
2466 dst->time_stamp[0] = src->time_stamp[0];
2467 dst->time_stamp[1] = src->time_stamp[1];
2468 if (src->flags & NETWORK_HAS_ERP_VALUE) {
2469 dst->erp_value = src->erp_value;
2470 dst->berp_info_valid = src->berp_info_valid = true;
2471 }
2472 dst->beacon_interval = src->beacon_interval;
2473 dst->listen_interval = src->listen_interval;
2474 dst->atim_window = src->atim_window;
2475 dst->dtim_period = src->dtim_period;
2476 dst->dtim_data = src->dtim_data;
2477 dst->last_dtim_sta_time = src->last_dtim_sta_time;
2478 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2479
2480 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2481 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2482 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2483 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2484 src->bssht.bdHTCapLen);
2485 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2486 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2487 src->bssht.bdHTInfoLen);
2488 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2489 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2490 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2491 dst->ralink_cap_exist = src->ralink_cap_exist;
2492 dst->atheros_cap_exist = src->atheros_cap_exist;
2493 dst->realtek_cap_exit = src->realtek_cap_exit;
2494 dst->marvell_cap_exist = src->marvell_cap_exist;
2495 dst->cisco_cap_exist = src->cisco_cap_exist;
2496 dst->airgo_cap_exist = src->airgo_cap_exist;
2497 dst->unknown_cap_exist = src->unknown_cap_exist;
2498 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2499 dst->wpa_ie_len = src->wpa_ie_len;
2500 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2501 dst->rsn_ie_len = src->rsn_ie_len;
2502 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2503 dst->wzc_ie_len = src->wzc_ie_len;
2504
2505 dst->last_scanned = jiffies;
2506 /* qos related parameters */
2507 qos_active = dst->qos_data.active;
2508 old_param = dst->qos_data.param_count;
2509 dst->qos_data.supported = src->qos_data.supported;
2510 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2511 memcpy(&dst->qos_data, &src->qos_data,
2512 sizeof(struct rtllib_qos_data));
2513 if (dst->qos_data.supported == 1) {
2514 if (dst->ssid_len)
2515 netdev_dbg(ieee->dev,
2516 "QoS the network %s is QoS supported\n",
2517 dst->ssid);
2518 else
2519 netdev_dbg(ieee->dev,
2520 "QoS the network is QoS supported\n");
2521 }
2522 dst->qos_data.active = qos_active;
2523 dst->qos_data.old_param_count = old_param;
2524
2525 dst->wmm_info = src->wmm_info;
2526 if (src->wmm_param[0].ac_aci_acm_aifsn ||
2527 src->wmm_param[1].ac_aci_acm_aifsn ||
2528 src->wmm_param[2].ac_aci_acm_aifsn ||
2529 src->wmm_param[3].ac_aci_acm_aifsn)
2530 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2531
2532 dst->SignalStrength = src->SignalStrength;
2533 dst->RSSI = src->RSSI;
2534 dst->Turbo_Enable = src->Turbo_Enable;
2535
2536 dst->CountryIeLen = src->CountryIeLen;
2537 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2538
2539 dst->bWithAironetIE = src->bWithAironetIE;
2540 dst->bCkipSupported = src->bCkipSupported;
2541 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2542 dst->bCcxRmEnable = src->bCcxRmEnable;
2543 dst->MBssidMask = src->MBssidMask;
2544 dst->bMBssidValid = src->bMBssidValid;
2545 memcpy(dst->MBssid, src->MBssid, 6);
2546 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2547 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2548 }
2549
2550 static inline int is_beacon(u16 fc)
2551 {
2552 return (WLAN_FC_GET_STYPE(fc) == RTLLIB_STYPE_BEACON);
2553 }
2554
2555 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2556 {
2557 if (channel > MAX_CHANNEL_NUMBER) {
2558 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2559 return 0;
2560 }
2561
2562 if (rtllib->active_channel_map[channel] == 2)
2563 return 1;
2564
2565 return 0;
2566 }
2567
2568 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2569 {
2570 if (channel > MAX_CHANNEL_NUMBER) {
2571 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2572 return 0;
2573 }
2574 if (rtllib->active_channel_map[channel] > 0)
2575 return 1;
2576
2577 return 0;
2578 }
2579 EXPORT_SYMBOL(rtllib_legal_channel);
2580
2581 static inline void rtllib_process_probe_response(
2582 struct rtllib_device *ieee,
2583 struct rtllib_probe_response *beacon,
2584 struct rtllib_rx_stats *stats)
2585 {
2586 struct rtllib_network *target;
2587 struct rtllib_network *oldest = NULL;
2588 struct rtllib_info_element *info_element = &beacon->info_element[0];
2589 unsigned long flags;
2590 short renew;
2591 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2592 GFP_ATOMIC);
2593 u16 frame_ctl = le16_to_cpu(beacon->header.frame_ctl);
2594
2595 if (!network)
2596 return;
2597
2598 netdev_dbg(ieee->dev,
2599 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2600 escape_essid(info_element->data, info_element->len),
2601 beacon->header.addr3,
2602 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2603 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2604 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2605 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2606 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2607 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2608 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2609 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2610 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2611 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2612 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2613 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2614 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2615 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2616 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2617 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2618
2619 if (rtllib_network_init(ieee, beacon, network, stats)) {
2620 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n",
2621 escape_essid(info_element->data, info_element->len),
2622 beacon->header.addr3,
2623 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2624 goto free_network;
2625 }
2626
2627
2628 if (!rtllib_legal_channel(ieee, network->channel))
2629 goto free_network;
2630
2631 if (WLAN_FC_GET_STYPE(frame_ctl) == RTLLIB_STYPE_PROBE_RESP) {
2632 if (IsPassiveChannel(ieee, network->channel)) {
2633 netdev_info(ieee->dev,
2634 "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2635 network->channel);
2636 goto free_network;
2637 }
2638 }
2639
2640 /* The network parsed correctly -- so now we scan our known networks
2641 * to see if we can find it in our list.
2642 *
2643 * NOTE: This search is definitely not optimized. Once its doing
2644 * the "right thing" we'll optimize it for efficiency if
2645 * necessary
2646 */
2647
2648 /* Search for this entry in the list and update it if it is
2649 * already there.
2650 */
2651
2652 spin_lock_irqsave(&ieee->lock, flags);
2653 if (is_same_network(&ieee->current_network, network,
2654 (network->ssid_len ? 1 : 0))) {
2655 update_network(ieee, &ieee->current_network, network);
2656 if ((ieee->current_network.mode == IEEE_N_24G ||
2657 ieee->current_network.mode == IEEE_G)
2658 && ieee->current_network.berp_info_valid) {
2659 if (ieee->current_network.erp_value & ERP_UseProtection)
2660 ieee->current_network.buseprotection = true;
2661 else
2662 ieee->current_network.buseprotection = false;
2663 }
2664 if (is_beacon(frame_ctl)) {
2665 if (ieee->state >= RTLLIB_LINKED)
2666 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2667 }
2668 }
2669 list_for_each_entry(target, &ieee->network_list, list) {
2670 if (is_same_network(target, network,
2671 (target->ssid_len ? 1 : 0)))
2672 break;
2673 if ((oldest == NULL) ||
2674 (target->last_scanned < oldest->last_scanned))
2675 oldest = target;
2676 }
2677
2678 /* If we didn't find a match, then get a new network slot to initialize
2679 * with this beacon's information
2680 */
2681 if (&target->list == &ieee->network_list) {
2682 if (list_empty(&ieee->network_free_list)) {
2683 /* If there are no more slots, expire the oldest */
2684 list_del(&oldest->list);
2685 target = oldest;
2686 netdev_dbg(ieee->dev,
2687 "Expired '%s' ( %pM) from network list.\n",
2688 escape_essid(target->ssid, target->ssid_len),
2689 target->bssid);
2690 } else {
2691 /* Otherwise just pull from the free list */
2692 target = list_entry(ieee->network_free_list.next,
2693 struct rtllib_network, list);
2694 list_del(ieee->network_free_list.next);
2695 }
2696
2697 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n",
2698 escape_essid(network->ssid, network->ssid_len),
2699 network->bssid,
2700 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2701
2702 memcpy(target, network, sizeof(*target));
2703 list_add_tail(&target->list, &ieee->network_list);
2704 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2705 rtllib_softmac_new_net(ieee, network);
2706 } else {
2707 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n",
2708 escape_essid(target->ssid, target->ssid_len),
2709 target->bssid,
2710 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2711
2712 /* we have an entry and we are going to update it. But this
2713 * entry may be already expired. In this case we do the same
2714 * as we found a new net and call the new_net handler
2715 */
2716 renew = !time_after(target->last_scanned + ieee->scan_age,
2717 jiffies);
2718 if ((!target->ssid_len) &&
2719 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2720 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2721 (strncmp(ieee->current_network.ssid, network->ssid,
2722 network->ssid_len) == 0) &&
2723 (ieee->state == RTLLIB_NOLINK))))
2724 renew = 1;
2725 update_network(ieee, target, network);
2726 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2727 rtllib_softmac_new_net(ieee, network);
2728 }
2729
2730 spin_unlock_irqrestore(&ieee->lock, flags);
2731 if (is_beacon(frame_ctl) &&
2732 is_same_network(&ieee->current_network, network,
2733 (network->ssid_len ? 1 : 0)) &&
2734 (ieee->state == RTLLIB_LINKED)) {
2735 if (ieee->handle_beacon != NULL)
2736 ieee->handle_beacon(ieee->dev, beacon,
2737 &ieee->current_network);
2738 }
2739 free_network:
2740 kfree(network);
2741 }
2742
2743 static void rtllib_rx_mgt(struct rtllib_device *ieee,
2744 struct sk_buff *skb,
2745 struct rtllib_rx_stats *stats)
2746 {
2747 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
2748
2749 if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2750 RTLLIB_STYPE_PROBE_RESP) &&
2751 (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2752 RTLLIB_STYPE_BEACON))
2753 ieee->last_rx_ps_time = jiffies;
2754
2755 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2756
2757 case RTLLIB_STYPE_BEACON:
2758 netdev_dbg(ieee->dev, "received BEACON (%d)\n",
2759 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2760 rtllib_process_probe_response(
2761 ieee, (struct rtllib_probe_response *)header,
2762 stats);
2763
2764 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2765 ieee->iw_mode == IW_MODE_INFRA &&
2766 ieee->state == RTLLIB_LINKED))
2767 tasklet_schedule(&ieee->ps_task);
2768
2769 break;
2770
2771 case RTLLIB_STYPE_PROBE_RESP:
2772 netdev_dbg(ieee->dev, "received PROBE RESPONSE (%d)\n",
2773 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2774 rtllib_process_probe_response(ieee,
2775 (struct rtllib_probe_response *)header, stats);
2776 break;
2777 case RTLLIB_STYPE_PROBE_REQ:
2778 netdev_dbg(ieee->dev, "received PROBE RESQUEST (%d)\n",
2779 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2780 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2781 ((ieee->iw_mode == IW_MODE_ADHOC ||
2782 ieee->iw_mode == IW_MODE_MASTER) &&
2783 ieee->state == RTLLIB_LINKED))
2784 rtllib_rx_probe_rq(ieee, skb);
2785 break;
2786 }
2787 }
Linux kernel - Deliverables
This page took 0.090834 seconds and 6 git commands to generate.