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i2c-eg20t: change timeout value 50msec to 1000msec
[zen-stable.git] / drivers / staging / rtl8192e / rtllib_rx.c
blob6c5061f12badb2f307895b467467b714e3463278
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/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 inline void rtllib_monitor_rx(struct rtllib_device *ieee,
48 struct sk_buff *skb, struct rtllib_rx_stats *rx_status,
49 size_t hdr_length)
50 {
51 skb->dev = ieee->dev;
52 skb_reset_mac_header(skb);
53 skb_pull(skb, hdr_length);
54 skb->pkt_type = PACKET_OTHERHOST;
55 skb->protocol = __constant_htons(ETH_P_80211_RAW);
56 memset(skb->cb, 0, sizeof(skb->cb));
57 netif_rx(skb);
58 }
59
60 /* Called only as a tasklet (software IRQ) */
61 static struct rtllib_frag_entry *
62 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
63 unsigned int frag, u8 tid, u8 *src, u8 *dst)
64 {
65 struct rtllib_frag_entry *entry;
66 int i;
67
68 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
69 entry = &ieee->frag_cache[tid][i];
70 if (entry->skb != NULL &&
71 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
72 RTLLIB_DEBUG_FRAG(
73 "expiring fragment cache entry "
74 "seq=%u last_frag=%u\n",
75 entry->seq, entry->last_frag);
76 dev_kfree_skb_any(entry->skb);
77 entry->skb = NULL;
78 }
79
80 if (entry->skb != NULL && entry->seq == seq &&
81 (entry->last_frag + 1 == frag || frag == -1) &&
82 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
83 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
84 return entry;
85 }
86
87 return NULL;
88 }
89
90 /* Called only as a tasklet (software IRQ) */
91 static struct sk_buff *
92 rtllib_frag_cache_get(struct rtllib_device *ieee,
93 struct rtllib_hdr_4addr *hdr)
94 {
95 struct sk_buff *skb = NULL;
96 u16 fc = le16_to_cpu(hdr->frame_ctl);
97 u16 sc = le16_to_cpu(hdr->seq_ctl);
98 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
99 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
100 struct rtllib_frag_entry *entry;
101 struct rtllib_hdr_3addrqos *hdr_3addrqos;
102 struct rtllib_hdr_4addrqos *hdr_4addrqos;
103 u8 tid;
104
105 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
106 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
107 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
108 tid = UP2AC(tid);
109 tid++;
110 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
111 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
112 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
113 tid = UP2AC(tid);
114 tid++;
115 } else {
116 tid = 0;
117 }
118
119 if (frag == 0) {
120 /* Reserve enough space to fit maximum frame length */
121 skb = dev_alloc_skb(ieee->dev->mtu +
122 sizeof(struct rtllib_hdr_4addr) +
123 8 /* LLC */ +
124 2 /* alignment */ +
125 8 /* WEP */ +
126 ETH_ALEN /* WDS */ +
127 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
128 if (skb == NULL)
129 return NULL;
130
131 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
132 ieee->frag_next_idx[tid]++;
133 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
134 ieee->frag_next_idx[tid] = 0;
135
136 if (entry->skb != NULL)
137 dev_kfree_skb_any(entry->skb);
138
139 entry->first_frag_time = jiffies;
140 entry->seq = seq;
141 entry->last_frag = frag;
142 entry->skb = skb;
143 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
144 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
145 } else {
146 /* received a fragment of a frame for which the head fragment
147 * should have already been received */
148 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
149 hdr->addr1);
150 if (entry != NULL) {
151 entry->last_frag = frag;
152 skb = entry->skb;
153 }
154 }
155
156 return skb;
157 }
158
159
160 /* Called only as a tasklet (software IRQ) */
161 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
162 struct rtllib_hdr_4addr *hdr)
163 {
164 u16 fc = le16_to_cpu(hdr->frame_ctl);
165 u16 sc = le16_to_cpu(hdr->seq_ctl);
166 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
167 struct rtllib_frag_entry *entry;
168 struct rtllib_hdr_3addrqos *hdr_3addrqos;
169 struct rtllib_hdr_4addrqos *hdr_4addrqos;
170 u8 tid;
171
172 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
173 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
174 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
175 tid = UP2AC(tid);
176 tid++;
177 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
178 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
179 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
180 tid = UP2AC(tid);
181 tid++;
182 } else {
183 tid = 0;
184 }
185
186 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
187 hdr->addr1);
188
189 if (entry == NULL) {
190 RTLLIB_DEBUG_FRAG(
191 "could not invalidate fragment cache "
192 "entry (seq=%u)\n", seq);
193 return -1;
194 }
195
196 entry->skb = NULL;
197 return 0;
198 }
199
200 /* rtllib_rx_frame_mgtmt
201 *
202 * Responsible for handling management control frames
203 *
204 * Called by rtllib_rx */
205 static inline int
206 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
207 struct rtllib_rx_stats *rx_stats, u16 type,
208 u16 stype)
209 {
210 /* On the struct stats definition there is written that
211 * this is not mandatory.... but seems that the probe
212 * response parser uses it
213 */
214 struct rtllib_hdr_3addr * hdr = (struct rtllib_hdr_3addr *)skb->data;
215
216 rx_stats->len = skb->len;
217 rtllib_rx_mgt(ieee, skb, rx_stats);
218 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
219 dev_kfree_skb_any(skb);
220 return 0;
221 }
222 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
223
224 dev_kfree_skb_any(skb);
225
226 return 0;
227 }
228
229 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
230 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
231 static unsigned char rfc1042_header[] = {
232 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
233 };
234 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
235 static unsigned char bridge_tunnel_header[] = {
236 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
237 };
238 /* No encapsulation header if EtherType < 0x600 (=length) */
239
240 /* Called by rtllib_rx_frame_decrypt */
241 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
242 struct sk_buff *skb, size_t hdrlen)
243 {
244 struct net_device *dev = ieee->dev;
245 u16 fc, ethertype;
246 struct rtllib_hdr_4addr *hdr;
247 u8 *pos;
248
249 if (skb->len < 24)
250 return 0;
251
252 hdr = (struct rtllib_hdr_4addr *) skb->data;
253 fc = le16_to_cpu(hdr->frame_ctl);
254
255 /* check that the frame is unicast frame to us */
256 if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
257 RTLLIB_FCTL_TODS &&
258 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
259 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
260 /* ToDS frame with own addr BSSID and DA */
261 } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
262 RTLLIB_FCTL_FROMDS &&
263 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
264 /* FromDS frame with own addr as DA */
265 } else
266 return 0;
267
268 if (skb->len < 24 + 8)
269 return 0;
270
271 /* check for port access entity Ethernet type */
272 pos = skb->data + hdrlen;
273 ethertype = (pos[6] << 8) | pos[7];
274 if (ethertype == ETH_P_PAE)
275 return 1;
276
277 return 0;
278 }
279
280 /* Called only as a tasklet (software IRQ), by rtllib_rx */
281 static inline int
282 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
283 struct lib80211_crypt_data *crypt)
284 {
285 struct rtllib_hdr_4addr *hdr;
286 int res, hdrlen;
287
288 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
289 return 0;
290
291 if (ieee->hwsec_active) {
292 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
293 tcb_desc->bHwSec = 1;
294
295 if (ieee->need_sw_enc)
296 tcb_desc->bHwSec = 0;
297 }
298
299 hdr = (struct rtllib_hdr_4addr *) skb->data;
300 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
301
302 atomic_inc(&crypt->refcnt);
303 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
304 atomic_dec(&crypt->refcnt);
305 if (res < 0) {
306 RTLLIB_DEBUG_DROP(
307 "decryption failed (SA= %pM"
308 ") res=%d\n", hdr->addr2, res);
309 if (res == -2)
310 RTLLIB_DEBUG_DROP("Decryption failed ICV "
311 "mismatch (key %d)\n",
312 skb->data[hdrlen + 3] >> 6);
313 ieee->ieee_stats.rx_discards_undecryptable++;
314 return -1;
315 }
316
317 return res;
318 }
319
320
321 /* Called only as a tasklet (software IRQ), by rtllib_rx */
322 static inline int
323 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
324 int keyidx, struct lib80211_crypt_data *crypt)
325 {
326 struct rtllib_hdr_4addr *hdr;
327 int res, hdrlen;
328
329 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
330 return 0;
331 if (ieee->hwsec_active) {
332 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
333 tcb_desc->bHwSec = 1;
334
335 if (ieee->need_sw_enc)
336 tcb_desc->bHwSec = 0;
337 }
338
339 hdr = (struct rtllib_hdr_4addr *) skb->data;
340 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
341
342 atomic_inc(&crypt->refcnt);
343 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
344 atomic_dec(&crypt->refcnt);
345 if (res < 0) {
346 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
347 " (SA= %pM keyidx=%d)\n",
348 ieee->dev->name, hdr->addr2, keyidx);
349 return -1;
350 }
351
352 return 0;
353 }
354
355
356 /* this function is stolen from ipw2200 driver*/
357 #define IEEE_PACKET_RETRY_TIME (5*HZ)
358 static int is_duplicate_packet(struct rtllib_device *ieee,
359 struct rtllib_hdr_4addr *header)
360 {
361 u16 fc = le16_to_cpu(header->frame_ctl);
362 u16 sc = le16_to_cpu(header->seq_ctl);
363 u16 seq = WLAN_GET_SEQ_SEQ(sc);
364 u16 frag = WLAN_GET_SEQ_FRAG(sc);
365 u16 *last_seq, *last_frag;
366 unsigned long *last_time;
367 struct rtllib_hdr_3addrqos *hdr_3addrqos;
368 struct rtllib_hdr_4addrqos *hdr_4addrqos;
369 u8 tid;
370
371 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
372 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
373 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
374 tid = UP2AC(tid);
375 tid++;
376 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
377 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
378 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
379 tid = UP2AC(tid);
380 tid++;
381 } else {
382 tid = 0;
383 }
384
385 switch (ieee->iw_mode) {
386 case IW_MODE_ADHOC:
387 {
388 struct list_head *p;
389 struct ieee_ibss_seq *entry = NULL;
390 u8 *mac = header->addr2;
391 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
392 list_for_each(p, &ieee->ibss_mac_hash[index]) {
393 entry = list_entry(p, struct ieee_ibss_seq, list);
394 if (!memcmp(entry->mac, mac, ETH_ALEN))
395 break;
396 }
397 if (p == &ieee->ibss_mac_hash[index]) {
398 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
399 if (!entry) {
400 printk(KERN_WARNING "Cannot malloc new mac entry\n");
401 return 0;
402 }
403 memcpy(entry->mac, mac, ETH_ALEN);
404 entry->seq_num[tid] = seq;
405 entry->frag_num[tid] = frag;
406 entry->packet_time[tid] = jiffies;
407 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
408 return 0;
409 }
410 last_seq = &entry->seq_num[tid];
411 last_frag = &entry->frag_num[tid];
412 last_time = &entry->packet_time[tid];
413 break;
414 }
415
416 case IW_MODE_INFRA:
417 last_seq = &ieee->last_rxseq_num[tid];
418 last_frag = &ieee->last_rxfrag_num[tid];
419 last_time = &ieee->last_packet_time[tid];
420 break;
421 default:
422 return 0;
423 }
424
425 if ((*last_seq == seq) &&
426 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
427 if (*last_frag == frag)
428 goto drop;
429 if (*last_frag + 1 != frag)
430 /* out-of-order fragment */
431 goto drop;
432 } else
433 *last_seq = seq;
434
435 *last_frag = frag;
436 *last_time = jiffies;
437 return 0;
438
439 drop:
440
441 return 1;
442 }
443
444 static bool AddReorderEntry(struct rx_ts_record *pTS,
445 struct rx_reorder_entry *pReorderEntry)
446 {
447 struct list_head *pList = &pTS->RxPendingPktList;
448
449 while (pList->next != &pTS->RxPendingPktList) {
450 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
451 list_entry(pList->next, struct rx_reorder_entry,
452 List))->SeqNum))
453 pList = pList->next;
454 else if (SN_EQUAL(pReorderEntry->SeqNum,
455 ((struct rx_reorder_entry *)list_entry(pList->next,
456 struct rx_reorder_entry, List))->SeqNum))
457 return false;
458 else
459 break;
460 }
461 pReorderEntry->List.next = pList->next;
462 pReorderEntry->List.next->prev = &pReorderEntry->List;
463 pReorderEntry->List.prev = pList;
464 pList->next = &pReorderEntry->List;
465
466 return true;
467 }
468
469 void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb **prxbIndicateArray, u8 index)
470 {
471 struct net_device_stats *stats = &ieee->stats;
472 u8 i = 0 , j = 0;
473 u16 ethertype;
474 for (j = 0; j < index; j++) {
475 struct rtllib_rxb *prxb = prxbIndicateArray[j];
476 for (i = 0; i < prxb->nr_subframes; i++) {
477 struct sk_buff *sub_skb = prxb->subframes[i];
478
479 /* convert hdr + possible LLC headers into Ethernet header */
480 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
481 if (sub_skb->len >= 8 &&
482 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
483 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
484 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
485 /* remove RFC1042 or Bridge-Tunnel encapsulation
486 * and replace EtherType */
487 skb_pull(sub_skb, SNAP_SIZE);
488 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
489 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
490 } else {
491 u16 len;
492 /* Leave Ethernet header part of hdr and full payload */
493 len = htons(sub_skb->len);
494 memcpy(skb_push(sub_skb, 2), &len, 2);
495 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
496 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
497 }
498
499 /* Indicat the packets to upper layer */
500 if (sub_skb) {
501 stats->rx_packets++;
502 stats->rx_bytes += sub_skb->len;
503
504 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
505 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
506 sub_skb->dev = ieee->dev;
507 sub_skb->dev->stats.rx_packets++;
508 sub_skb->dev->stats.rx_bytes += sub_skb->len;
509 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
510 ieee->last_rx_ps_time = jiffies;
511 netif_rx(sub_skb);
512 }
513 }
514 kfree(prxb);
515 prxb = NULL;
516 }
517 }
518
519 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, struct rx_ts_record *pTS)
520 {
521 struct rx_reorder_entry *pRxReorderEntry;
522 u8 RfdCnt = 0;
523
524 del_timer_sync(&pTS->RxPktPendingTimer);
525 while (!list_empty(&pTS->RxPendingPktList)) {
526 if (RfdCnt >= REORDER_WIN_SIZE) {
527 printk(KERN_INFO "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", __func__);
528 break;
529 }
530
531 pRxReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev, struct rx_reorder_entry, List);
532 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pRxReorderEntry->SeqNum);
533 list_del_init(&pRxReorderEntry->List);
534
535 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
536
537 RfdCnt = RfdCnt + 1;
538 list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
539 }
540 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
541
542 pTS->RxIndicateSeq = 0xffff;
543 }
544
545 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
546 struct rtllib_rxb *prxb,
547 struct rx_ts_record *pTS, u16 SeqNum)
548 {
549 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
550 struct rx_reorder_entry *pReorderEntry = NULL;
551 u8 WinSize = pHTInfo->RxReorderWinSize;
552 u16 WinEnd = 0;
553 u8 index = 0;
554 bool bMatchWinStart = false, bPktInBuf = false;
555 unsigned long flags;
556
557 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Seq is %d, pTS->RxIndicateSeq"
558 " is %d, WinSize is %d\n", __func__, SeqNum,
559 pTS->RxIndicateSeq, WinSize);
560
561 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
562
563 WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
564 /* Rx Reorder initialize condition.*/
565 if (pTS->RxIndicateSeq == 0xffff)
566 pTS->RxIndicateSeq = SeqNum;
567
568 /* Drop out the packet which SeqNum is smaller than WinStart */
569 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
570 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
571 pTS->RxIndicateSeq, SeqNum);
572 pHTInfo->RxReorderDropCounter++;
573 {
574 int i;
575 for (i = 0; i < prxb->nr_subframes; i++)
576 dev_kfree_skb(prxb->subframes[i]);
577 kfree(prxb);
578 prxb = NULL;
579 }
580 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
581 return;
582 }
583
584 /*
585 * Sliding window manipulation. Conditions includes:
586 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
587 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
588 */
589 if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
590 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
591 bMatchWinStart = true;
592 } else if (SN_LESS(WinEnd, SeqNum)) {
593 if (SeqNum >= (WinSize - 1))
594 pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
595 else
596 pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum + 1)) + 1;
597 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d,"
598 " NewSeq: %d\n", pTS->RxIndicateSeq, SeqNum);
599 }
600
601 /*
602 * Indication process.
603 * After Packet dropping and Sliding Window shifting as above, we can
604 * now just indicate the packets with the SeqNum smaller than latest
605 * WinStart and struct buffer other packets.
606 */
607 /* For Rx Reorder condition:
608 * 1. All packets with SeqNum smaller than WinStart => Indicate
609 * 2. All packets with SeqNum larger than or equal to
610 * WinStart => Buffer it.
611 */
612 if (bMatchWinStart) {
613 /* Current packet is going to be indicated.*/
614 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! "
615 "IndicateSeq: %d, NewSeq: %d\n",
616 pTS->RxIndicateSeq, SeqNum);
617 ieee->prxbIndicateArray[0] = prxb;
618 index = 1;
619 } else {
620 /* Current packet is going to be inserted into pending list.*/
621 if (!list_empty(&ieee->RxReorder_Unused_List)) {
622 pReorderEntry = (struct rx_reorder_entry *)
623 list_entry(ieee->RxReorder_Unused_List.next,
624 struct rx_reorder_entry, List);
625 list_del_init(&pReorderEntry->List);
626
627 /* Make a reorder entry and insert into a the packet list.*/
628 pReorderEntry->SeqNum = SeqNum;
629 pReorderEntry->prxb = prxb;
630
631 if (!AddReorderEntry(pTS, pReorderEntry)) {
632 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
633 "%s(): Duplicate packet is "
634 "dropped!! IndicateSeq: %d, "
635 "NewSeq: %d\n",
636 __func__, pTS->RxIndicateSeq,
637 SeqNum);
638 list_add_tail(&pReorderEntry->List,
639 &ieee->RxReorder_Unused_List); {
640 int i;
641 for (i = 0; i < prxb->nr_subframes; i++)
642 dev_kfree_skb(prxb->subframes[i]);
643 kfree(prxb);
644 prxb = NULL;
645 }
646 } else {
647 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
648 "Pkt insert into struct buffer!! "
649 "IndicateSeq: %d, NewSeq: %d\n",
650 pTS->RxIndicateSeq, SeqNum);
651 }
652 } else {
653 /*
654 * Packets are dropped if there are not enough reorder
655 * entries. This part should be modified!! We can just
656 * indicate all the packets in struct buffer and get
657 * reorder entries.
658 */
659 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
660 " There is no reorder entry!! Packet is "
661 "dropped!!\n");
662 {
663 int i;
664 for (i = 0; i < prxb->nr_subframes; i++)
665 dev_kfree_skb(prxb->subframes[i]);
666 kfree(prxb);
667 prxb = NULL;
668 }
669 }
670 }
671
672 /* Check if there is any packet need indicate.*/
673 while (!list_empty(&pTS->RxPendingPktList)) {
674 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
675
676 pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,
677 struct rx_reorder_entry, List);
678 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
679 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
680 /* This protect struct buffer from overflow. */
681 if (index >= REORDER_WIN_SIZE) {
682 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicate"
683 "Packet(): Buffer overflow!!\n");
684 bPktInBuf = true;
685 break;
686 }
687
688 list_del_init(&pReorderEntry->List);
689
690 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
691 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
692
693 ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
694 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum"
695 " %d!\n", __func__, pReorderEntry->SeqNum);
696 index++;
697
698 list_add_tail(&pReorderEntry->List,
699 &ieee->RxReorder_Unused_List);
700 } else {
701 bPktInBuf = true;
702 break;
703 }
704 }
705
706 /* Handling pending timer. Set this timer to prevent from long time
707 * Rx buffering.*/
708 if (index > 0) {
709 if (timer_pending(&pTS->RxPktPendingTimer))
710 del_timer_sync(&pTS->RxPktPendingTimer);
711 pTS->RxTimeoutIndicateSeq = 0xffff;
712
713 if (index > REORDER_WIN_SIZE) {
714 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
715 " Rx Reorer struct buffer full!!\n");
716 spin_unlock_irqrestore(&(ieee->reorder_spinlock),
717 flags);
718 return;
719 }
720 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
721 bPktInBuf = false;
722 }
723
724 if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
725 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): SET rx timeout timer\n",
726 __func__);
727 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
728 mod_timer(&pTS->RxPktPendingTimer, jiffies +
729 MSECS(pHTInfo->RxReorderPendingTime));
730 }
731 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
732 }
733
734 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
735 struct rtllib_rx_stats *rx_stats,
736 struct rtllib_rxb *rxb, u8 *src, u8 *dst)
737 {
738 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
739 u16 fc = le16_to_cpu(hdr->frame_ctl);
740
741 u16 LLCOffset = sizeof(struct rtllib_hdr_3addr);
742 u16 ChkLength;
743 bool bIsAggregateFrame = false;
744 u16 nSubframe_Length;
745 u8 nPadding_Length = 0;
746 u16 SeqNum = 0;
747 struct sk_buff *sub_skb;
748 u8 *data_ptr;
749 /* just for debug purpose */
750 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
751 if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
752 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
753 bIsAggregateFrame = true;
754
755 if (RTLLIB_QOS_HAS_SEQ(fc))
756 LLCOffset += 2;
757 if (rx_stats->bContainHTC)
758 LLCOffset += sHTCLng;
759
760 ChkLength = LLCOffset;
761
762 if (skb->len <= ChkLength)
763 return 0;
764
765 skb_pull(skb, LLCOffset);
766 ieee->bIsAggregateFrame = bIsAggregateFrame;
767 if (!bIsAggregateFrame) {
768 rxb->nr_subframes = 1;
769
770 /* altered by clark 3/30/2010
771 * The struct buffer size of the skb indicated to upper layer
772 * must be less than 5000, or the defraged IP datagram
773 * in the IP layer will exceed "ipfrag_high_tresh" and be
774 * discarded. so there must not use the function
775 * "skb_copy" and "skb_clone" for "skb".
776 */
777
778 /* Allocate new skb for releasing to upper layer */
779 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
780 skb_reserve(sub_skb, 12);
781 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
782 memcpy(data_ptr, skb->data, skb->len);
783 sub_skb->dev = ieee->dev;
784
785 rxb->subframes[0] = sub_skb;
786
787 memcpy(rxb->src, src, ETH_ALEN);
788 memcpy(rxb->dst, dst, ETH_ALEN);
789 rxb->subframes[0]->dev = ieee->dev;
790 return 1;
791 } else {
792 rxb->nr_subframes = 0;
793 memcpy(rxb->src, src, ETH_ALEN);
794 memcpy(rxb->dst, dst, ETH_ALEN);
795 while (skb->len > ETHERNET_HEADER_SIZE) {
796 /* Offset 12 denote 2 mac address */
797 nSubframe_Length = *((u16 *)(skb->data + 12));
798 nSubframe_Length = (nSubframe_Length >> 8) +
799 (nSubframe_Length << 8);
800
801 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
802 printk(KERN_INFO "%s: A-MSDU parse error!! "
803 "pRfd->nTotalSubframe : %d\n",\
804 __func__, rxb->nr_subframes);
805 printk(KERN_INFO "%s: A-MSDU parse error!! "
806 "Subframe Length: %d\n", __func__,
807 nSubframe_Length);
808 printk(KERN_INFO "nRemain_Length is %d and "
809 "nSubframe_Length is : %d\n", skb->len,
810 nSubframe_Length);
811 printk(KERN_INFO "The Packet SeqNum is %d\n", SeqNum);
812 return 0;
813 }
814
815 /* move the data point to data content */
816 skb_pull(skb, ETHERNET_HEADER_SIZE);
817
818 /* altered by clark 3/30/2010
819 * The struct buffer size of the skb indicated to upper layer
820 * must be less than 5000, or the defraged IP datagram
821 * in the IP layer will exceed "ipfrag_high_tresh" and be
822 * discarded. so there must not use the function
823 * "skb_copy" and "skb_clone" for "skb".
824 */
825
826 /* Allocate new skb for releasing to upper layer */
827 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
828 skb_reserve(sub_skb, 12);
829 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
830 memcpy(data_ptr, skb->data, nSubframe_Length);
831
832 sub_skb->dev = ieee->dev;
833 rxb->subframes[rxb->nr_subframes++] = sub_skb;
834 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
835 RTLLIB_DEBUG_RX("ParseSubframe(): Too many "
836 "Subframes! Packets dropped!\n");
837 break;
838 }
839 skb_pull(skb, nSubframe_Length);
840
841 if (skb->len != 0) {
842 nPadding_Length = 4 - ((nSubframe_Length +
843 ETHERNET_HEADER_SIZE) % 4);
844 if (nPadding_Length == 4)
845 nPadding_Length = 0;
846
847 if (skb->len < nPadding_Length)
848 return 0;
849
850 skb_pull(skb, nPadding_Length);
851 }
852 }
853
854 return rxb->nr_subframes;
855 }
856 }
857
858
859 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
860 struct sk_buff *skb,
861 struct rtllib_rx_stats *rx_stats)
862 {
863 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
864 u16 fc = le16_to_cpu(hdr->frame_ctl);
865 size_t hdrlen = 0;
866
867 hdrlen = rtllib_get_hdrlen(fc);
868 if (HTCCheck(ieee, skb->data)) {
869 if (net_ratelimit())
870 printk(KERN_INFO "%s: find HTCControl!\n", __func__);
871 hdrlen += 4;
872 rx_stats->bContainHTC = 1;
873 }
874
875 if (RTLLIB_QOS_HAS_SEQ(fc))
876 rx_stats->bIsQosData = 1;
877
878 return hdrlen;
879 }
880
881 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
882 struct sk_buff *skb, u8 multicast)
883 {
884 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
885 u16 fc, sc;
886 u8 frag, type, stype;
887
888 fc = le16_to_cpu(hdr->frame_ctl);
889 type = WLAN_FC_GET_TYPE(fc);
890 stype = WLAN_FC_GET_STYPE(fc);
891 sc = le16_to_cpu(hdr->seq_ctl);
892 frag = WLAN_GET_SEQ_FRAG(sc);
893
894 if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
895 !ieee->current_network.qos_data.active ||
896 !IsDataFrame(skb->data) ||
897 IsLegacyDataFrame(skb->data)) {
898 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))) {
899 if (is_duplicate_packet(ieee, hdr))
900 return -1;
901 }
902 } else {
903 struct rx_ts_record *pRxTS = NULL;
904 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
905 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
906 if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
907 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) {
908 return -1;
909 } else {
910 pRxTS->RxLastFragNum = frag;
911 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
912 }
913 } else {
914 RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip"
915 " the check!!\n", __func__);
916 return -1;
917 }
918 }
919
920 return 0;
921 }
922
923 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
924 struct rtllib_hdr_4addr *hdr, u8 *dst,
925 u8 *src, u8 *bssid)
926 {
927 u16 fc = le16_to_cpu(hdr->frame_ctl);
928
929 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
930 case RTLLIB_FCTL_FROMDS:
931 memcpy(dst, hdr->addr1, ETH_ALEN);
932 memcpy(src, hdr->addr3, ETH_ALEN);
933 memcpy(bssid, hdr->addr2, ETH_ALEN);
934 break;
935 case RTLLIB_FCTL_TODS:
936 memcpy(dst, hdr->addr3, ETH_ALEN);
937 memcpy(src, hdr->addr2, ETH_ALEN);
938 memcpy(bssid, hdr->addr1, ETH_ALEN);
939 break;
940 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
941 memcpy(dst, hdr->addr3, ETH_ALEN);
942 memcpy(src, hdr->addr4, ETH_ALEN);
943 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
944 break;
945 case 0:
946 memcpy(dst, hdr->addr1, ETH_ALEN);
947 memcpy(src, hdr->addr2, ETH_ALEN);
948 memcpy(bssid, hdr->addr3, ETH_ALEN);
949 break;
950 }
951 }
952
953 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
954 u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
955 {
956 u8 zero_addr[ETH_ALEN] = {0};
957 u8 type, stype;
958
959 type = WLAN_FC_GET_TYPE(fc);
960 stype = WLAN_FC_GET_STYPE(fc);
961
962 /* Filter frames from different BSS */
963 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS)
964 && (compare_ether_addr(ieee->current_network.bssid, bssid) != 0)
965 && memcmp(ieee->current_network.bssid, zero_addr, ETH_ALEN)) {
966 return -1;
967 }
968
969 /* Filter packets sent by an STA that will be forwarded by AP */
970 if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
971 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
972 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
973 (compare_ether_addr(dst, ieee->current_network.bssid) != 0) &&
974 (compare_ether_addr(bssid, ieee->current_network.bssid) == 0)) {
975 return -1;
976 }
977 }
978
979 /* Nullfunc frames may have PS-bit set, so they must be passed to
980 * hostap_handle_sta_rx() before being dropped here. */
981 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
982 if (stype != RTLLIB_STYPE_DATA &&
983 stype != RTLLIB_STYPE_DATA_CFACK &&
984 stype != RTLLIB_STYPE_DATA_CFPOLL &&
985 stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
986 stype != RTLLIB_STYPE_QOS_DATA) {
987 if (stype != RTLLIB_STYPE_NULLFUNC)
988 RTLLIB_DEBUG_DROP(
989 "RX: dropped data frame "
990 "with no data (type=0x%02x, "
991 "subtype=0x%02x)\n",
992 type, stype);
993 return -1;
994 }
995 }
996
997 if (ieee->iw_mode != IW_MODE_MESH) {
998 /* packets from our adapter are dropped (echo) */
999 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1000 return -1;
1001
1002 /* {broad,multi}cast packets to our BSS go through */
1003 if (is_multicast_ether_addr(dst) || is_broadcast_ether_addr(dst)) {
1004 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1005 return -1;
1006 }
1007 }
1008 return 0;
1009 }
1010
1011 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1012 struct lib80211_crypt_data **crypt, size_t hdrlen)
1013 {
1014 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1015 u16 fc = le16_to_cpu(hdr->frame_ctl);
1016 int idx = 0;
1017
1018 if (ieee->host_decrypt) {
1019 if (skb->len >= hdrlen + 3)
1020 idx = skb->data[hdrlen + 3] >> 6;
1021
1022 *crypt = ieee->crypt_info.crypt[idx];
1023 /* allow NULL decrypt to indicate an station specific override
1024 * for default encryption */
1025 if (*crypt && ((*crypt)->ops == NULL ||
1026 (*crypt)->ops->decrypt_mpdu == NULL))
1027 *crypt = NULL;
1028
1029 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1030 /* This seems to be triggered by some (multicast?)
1031 * frames from other than current BSS, so just drop the
1032 * frames silently instead of filling system log with
1033 * these reports. */
1034 RTLLIB_DEBUG_DROP("Decryption failed (not set)"
1035 " (SA= %pM)\n",
1036 hdr->addr2);
1037 ieee->ieee_stats.rx_discards_undecryptable++;
1038 return -1;
1039 }
1040 }
1041
1042 return 0;
1043 }
1044
1045 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1046 struct rtllib_rx_stats *rx_stats,
1047 struct lib80211_crypt_data *crypt, size_t hdrlen)
1048 {
1049 struct rtllib_hdr_4addr *hdr;
1050 int keyidx = 0;
1051 u16 fc, sc;
1052 u8 frag;
1053
1054 hdr = (struct rtllib_hdr_4addr *)skb->data;
1055 fc = le16_to_cpu(hdr->frame_ctl);
1056 sc = le16_to_cpu(hdr->seq_ctl);
1057 frag = WLAN_GET_SEQ_FRAG(sc);
1058
1059 if ((!rx_stats->Decrypted))
1060 ieee->need_sw_enc = 1;
1061 else
1062 ieee->need_sw_enc = 0;
1063
1064 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1065 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1066 printk(KERN_INFO "%s: decrypt frame error\n", __func__);
1067 return -1;
1068 }
1069
1070 hdr = (struct rtllib_hdr_4addr *) skb->data;
1071 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1072 int flen;
1073 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1074 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1075
1076 if (!frag_skb) {
1077 RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1078 "Rx cannot get skb from fragment "
1079 "cache (morefrag=%d seq=%u frag=%u)\n",
1080 (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1081 WLAN_GET_SEQ_SEQ(sc), frag);
1082 return -1;
1083 }
1084 flen = skb->len;
1085 if (frag != 0)
1086 flen -= hdrlen;
1087
1088 if (frag_skb->tail + flen > frag_skb->end) {
1089 printk(KERN_WARNING "%s: host decrypted and "
1090 "reassembled frame did not fit skb\n",
1091 __func__);
1092 rtllib_frag_cache_invalidate(ieee, hdr);
1093 return -1;
1094 }
1095
1096 if (frag == 0) {
1097 /* copy first fragment (including full headers) into
1098 * beginning of the fragment cache skb */
1099 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1100 } else {
1101 /* append frame payload to the end of the fragment
1102 * cache skb */
1103 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1104 flen);
1105 }
1106 dev_kfree_skb_any(skb);
1107 skb = NULL;
1108
1109 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1110 /* more fragments expected - leave the skb in fragment
1111 * cache for now; it will be delivered to upper layers
1112 * after all fragments have been received */
1113 return -2;
1114 }
1115
1116 /* this was the last fragment and the frame will be
1117 * delivered, so remove skb from fragment cache */
1118 skb = frag_skb;
1119 hdr = (struct rtllib_hdr_4addr *) skb->data;
1120 rtllib_frag_cache_invalidate(ieee, hdr);
1121 }
1122
1123 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1124 * encrypted/authenticated */
1125 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1126 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1127 printk(KERN_INFO "%s: ==>decrypt msdu error\n", __func__);
1128 return -1;
1129 }
1130
1131 hdr = (struct rtllib_hdr_4addr *) skb->data;
1132 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1133 if (/*ieee->ieee802_1x &&*/
1134 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1135
1136 /* pass unencrypted EAPOL frames even if encryption is
1137 * configured */
1138 struct eapol *eap = (struct eapol *)(skb->data +
1139 24);
1140 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1141 eap_get_type(eap->type));
1142 } else {
1143 RTLLIB_DEBUG_DROP(
1144 "encryption configured, but RX "
1145 "frame not encrypted (SA= %pM)\n",
1146 hdr->addr2);
1147 return -1;
1148 }
1149 }
1150
1151 if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1152 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1153 struct eapol *eap = (struct eapol *)(skb->data +
1154 24);
1155 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1156 eap_get_type(eap->type));
1157 }
1158
1159 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1160 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1161 RTLLIB_DEBUG_DROP(
1162 "dropped unencrypted RX data "
1163 "frame from %pM"
1164 " (drop_unencrypted=1)\n",
1165 hdr->addr2);
1166 return -1;
1167 }
1168
1169 if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1170 printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n");
1171
1172 return 0;
1173 }
1174
1175 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
1176 {
1177 if (unicast) {
1178
1179 if ((ieee->state == RTLLIB_LINKED)) {
1180 if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1181 ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1182 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1183 if (ieee->LeisurePSLeave)
1184 ieee->LeisurePSLeave(ieee->dev);
1185 }
1186 }
1187 }
1188 ieee->last_rx_ps_time = jiffies;
1189 }
1190
1191 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1192 struct rtllib_rx_stats *rx_stats,
1193 struct rtllib_rxb *rxb,
1194 u8 *dst,
1195 u8 *src)
1196 {
1197 struct net_device *dev = ieee->dev;
1198 u16 ethertype;
1199 int i = 0;
1200
1201 if (rxb == NULL) {
1202 printk(KERN_INFO "%s: rxb is NULL!!\n", __func__);
1203 return ;
1204 }
1205
1206 for (i = 0; i < rxb->nr_subframes; i++) {
1207 struct sk_buff *sub_skb = rxb->subframes[i];
1208
1209 if (sub_skb) {
1210 /* convert hdr + possible LLC headers into Ethernet header */
1211 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1212 if (sub_skb->len >= 8 &&
1213 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1214 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1215 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1216 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1217 * replace EtherType */
1218 skb_pull(sub_skb, SNAP_SIZE);
1219 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1220 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1221 } else {
1222 u16 len;
1223 /* Leave Ethernet header part of hdr and full payload */
1224 len = htons(sub_skb->len);
1225 memcpy(skb_push(sub_skb, 2), &len, 2);
1226 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1227 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1228 }
1229
1230 ieee->stats.rx_packets++;
1231 ieee->stats.rx_bytes += sub_skb->len;
1232
1233 if (is_multicast_ether_addr(dst))
1234 ieee->stats.multicast++;
1235
1236 /* Indicat the packets to upper layer */
1237 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1238 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1239 sub_skb->dev = dev;
1240 sub_skb->dev->stats.rx_packets++;
1241 sub_skb->dev->stats.rx_bytes += sub_skb->len;
1242 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1243 netif_rx(sub_skb);
1244 }
1245 }
1246 kfree(rxb);
1247 rxb = NULL;
1248 }
1249
1250 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1251 struct rtllib_rx_stats *rx_stats)
1252 {
1253 struct net_device *dev = ieee->dev;
1254 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1255 struct lib80211_crypt_data *crypt = NULL;
1256 struct rtllib_rxb *rxb = NULL;
1257 struct rx_ts_record *pTS = NULL;
1258 u16 fc, sc, SeqNum = 0;
1259 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1260 u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
1261 size_t hdrlen = 0;
1262 bool bToOtherSTA = false;
1263 int ret = 0, i = 0;
1264
1265 hdr = (struct rtllib_hdr_4addr *)skb->data;
1266 fc = le16_to_cpu(hdr->frame_ctl);
1267 type = WLAN_FC_GET_TYPE(fc);
1268 stype = WLAN_FC_GET_STYPE(fc);
1269 sc = le16_to_cpu(hdr->seq_ctl);
1270
1271 /*Filter pkt not to me*/
1272 multicast = is_multicast_ether_addr(hdr->addr1)|is_broadcast_ether_addr(hdr->addr1);
1273 unicast = !multicast;
1274 if (unicast && (compare_ether_addr(dev->dev_addr, hdr->addr1) != 0)) {
1275 if (ieee->bNetPromiscuousMode)
1276 bToOtherSTA = true;
1277 else
1278 goto rx_dropped;
1279 }
1280
1281 /*Filter pkt has too small length */
1282 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1283 if (skb->len < hdrlen) {
1284 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1285 goto rx_dropped;
1286 }
1287
1288 /* Filter Duplicate pkt */
1289 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1290 if (ret < 0)
1291 goto rx_dropped;
1292
1293 /* Filter CTRL Frame */
1294 if (type == RTLLIB_FTYPE_CTL)
1295 goto rx_dropped;
1296
1297 /* Filter MGNT Frame */
1298 if (type == RTLLIB_FTYPE_MGMT) {
1299 if (bToOtherSTA)
1300 goto rx_dropped;
1301 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1302 goto rx_dropped;
1303 else
1304 goto rx_exit;
1305 }
1306
1307 /* Filter WAPI DATA Frame */
1308
1309 /* Update statstics for AP roaming */
1310 if (!bToOtherSTA) {
1311 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1312 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1313 }
1314 dev->last_rx = jiffies;
1315
1316 /* Data frame - extract src/dst addresses */
1317 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1318
1319 /* Filter Data frames */
1320 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1321 if (ret < 0)
1322 goto rx_dropped;
1323
1324 if (skb->len == hdrlen)
1325 goto rx_dropped;
1326
1327 /* Send pspoll based on moredata */
1328 if ((ieee->iw_mode == IW_MODE_INFRA) && (ieee->sta_sleep == LPS_IS_SLEEP)
1329 && (ieee->polling) && (!bToOtherSTA)) {
1330 if (WLAN_FC_MORE_DATA(fc)) {
1331 /* more data bit is set, let's request a new frame from the AP */
1332 rtllib_sta_ps_send_pspoll_frame(ieee);
1333 } else {
1334 ieee->polling = false;
1335 }
1336 }
1337
1338 /* Get crypt if encrypted */
1339 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1340 if (ret == -1)
1341 goto rx_dropped;
1342
1343 /* Decrypt data frame (including reassemble) */
1344 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1345 if (ret == -1)
1346 goto rx_dropped;
1347 else if (ret == -2)
1348 goto rx_exit;
1349
1350 /* Get TS for Rx Reorder */
1351 hdr = (struct rtllib_hdr_4addr *) skb->data;
1352 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1353 && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1)
1354 && (!bToOtherSTA)) {
1355 TID = Frame_QoSTID(skb->data);
1356 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1357 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, RX_DIR, true);
1358 if (TID != 0 && TID != 3)
1359 ieee->bis_any_nonbepkts = true;
1360 }
1361
1362 /* Parse rx data frame (For AMSDU) */
1363 /* skb: hdr + (possible reassembled) full plaintext payload */
1364 payload = skb->data + hdrlen;
1365 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1366 if (rxb == NULL) {
1367 RTLLIB_DEBUG(RTLLIB_DL_ERR,
1368 "%s(): kmalloc rxb error\n", __func__);
1369 goto rx_dropped;
1370 }
1371 /* to parse amsdu packets */
1372 /* qos data packets & reserved bit is 1 */
1373 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1374 /* only to free rxb, and not submit the packets to upper layer */
1375 for (i = 0; i < rxb->nr_subframes; i++)
1376 dev_kfree_skb(rxb->subframes[i]);
1377 kfree(rxb);
1378 rxb = NULL;
1379 goto rx_dropped;
1380 }
1381
1382 /* Update WAPI PN */
1383
1384 /* Check if leave LPS */
1385 if (!bToOtherSTA) {
1386 if (ieee->bIsAggregateFrame)
1387 nr_subframes = rxb->nr_subframes;
1388 else
1389 nr_subframes = 1;
1390 if (unicast)
1391 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1392 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1393 }
1394
1395 /* Indicate packets to upper layer or Rx Reorder */
1396 if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || bToOtherSTA)
1397 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1398 else
1399 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1400
1401 dev_kfree_skb(skb);
1402
1403 rx_exit:
1404 return 1;
1405
1406 rx_dropped:
1407 if (rxb != NULL) {
1408 kfree(rxb);
1409 rxb = NULL;
1410 }
1411 ieee->stats.rx_dropped++;
1412
1413 /* Returning 0 indicates to caller that we have not handled the SKB--
1414 * so it is still allocated and can be used again by underlying
1415 * hardware as a DMA target */
1416 return 0;
1417 }
1418
1419 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1420 struct rtllib_rx_stats *rx_stats)
1421 {
1422 return 0;
1423 }
1424
1425 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1426 struct rtllib_rx_stats *rx_stats)
1427 {
1428 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1429 u16 fc = le16_to_cpu(hdr->frame_ctl);
1430 size_t hdrlen = rtllib_get_hdrlen(fc);
1431
1432 if (skb->len < hdrlen) {
1433 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1434 return 0;
1435 }
1436
1437 if (HTCCheck(ieee, skb->data)) {
1438 if (net_ratelimit())
1439 printk(KERN_INFO "%s: Find HTCControl!\n", __func__);
1440 hdrlen += 4;
1441 }
1442
1443 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1444 ieee->stats.rx_packets++;
1445 ieee->stats.rx_bytes += skb->len;
1446
1447 return 1;
1448 }
1449
1450 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1451 struct rtllib_rx_stats *rx_stats)
1452 {
1453 return 0;
1454 }
1455
1456 /* All received frames are sent to this function. @skb contains the frame in
1457 * IEEE 802.11 format, i.e., in the format it was sent over air.
1458 * This function is called only as a tasklet (software IRQ). */
1459 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1460 struct rtllib_rx_stats *rx_stats)
1461 {
1462 int ret = 0;
1463
1464 if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1465 printk(KERN_INFO "%s: Input parameters NULL!\n", __func__);
1466 goto rx_dropped;
1467 }
1468 if (skb->len < 10) {
1469 printk(KERN_INFO "%s: SKB length < 10\n", __func__);
1470 goto rx_dropped;
1471 }
1472
1473 switch (ieee->iw_mode) {
1474 case IW_MODE_ADHOC:
1475 case IW_MODE_INFRA:
1476 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1477 break;
1478 case IW_MODE_MASTER:
1479 case IW_MODE_REPEAT:
1480 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1481 break;
1482 case IW_MODE_MONITOR:
1483 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1484 break;
1485 case IW_MODE_MESH:
1486 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1487 break;
1488 default:
1489 printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__);
1490 break;
1491 }
1492
1493 return ret;
1494
1495 rx_dropped:
1496 ieee->stats.rx_dropped++;
1497 return 0;
1498 }
1499 EXPORT_SYMBOL(rtllib_rx);
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 rtllib_legal_channel(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 EXPORT_SYMBOL(rtllib_legal_channel);
2507
2508 static inline void rtllib_process_probe_response(
2509 struct rtllib_device *ieee,
2510 struct rtllib_probe_response *beacon,
2511 struct rtllib_rx_stats *stats)
2512 {
2513 struct rtllib_network *target;
2514 struct rtllib_network *oldest = NULL;
2515 struct rtllib_info_element *info_element = &beacon->info_element[0];
2516 unsigned long flags;
2517 short renew;
2518 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2519 GFP_ATOMIC);
2520
2521 if (!network)
2522 return;
2523
2524 RTLLIB_DEBUG_SCAN(
2525 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2526 escape_essid(info_element->data, info_element->len),
2527 beacon->header.addr3,
2528 (beacon->capability & (1<<0xf)) ? '1' : '0',
2529 (beacon->capability & (1<<0xe)) ? '1' : '0',
2530 (beacon->capability & (1<<0xd)) ? '1' : '0',
2531 (beacon->capability & (1<<0xc)) ? '1' : '0',
2532 (beacon->capability & (1<<0xb)) ? '1' : '0',
2533 (beacon->capability & (1<<0xa)) ? '1' : '0',
2534 (beacon->capability & (1<<0x9)) ? '1' : '0',
2535 (beacon->capability & (1<<0x8)) ? '1' : '0',
2536 (beacon->capability & (1<<0x7)) ? '1' : '0',
2537 (beacon->capability & (1<<0x6)) ? '1' : '0',
2538 (beacon->capability & (1<<0x5)) ? '1' : '0',
2539 (beacon->capability & (1<<0x4)) ? '1' : '0',
2540 (beacon->capability & (1<<0x3)) ? '1' : '0',
2541 (beacon->capability & (1<<0x2)) ? '1' : '0',
2542 (beacon->capability & (1<<0x1)) ? '1' : '0',
2543 (beacon->capability & (1<<0x0)) ? '1' : '0');
2544
2545 if (rtllib_network_init(ieee, beacon, network, stats)) {
2546 RTLLIB_DEBUG_SCAN("Dropped '%s' ( %pM) via %s.\n",
2547 escape_essid(info_element->data,
2548 info_element->len),
2549 beacon->header.addr3,
2550 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2551 RTLLIB_STYPE_PROBE_RESP ?
2552 "PROBE RESPONSE" : "BEACON");
2553 goto free_network;
2554 }
2555
2556
2557 if (!rtllib_legal_channel(ieee, network->channel))
2558 goto free_network;
2559
2560 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2561 RTLLIB_STYPE_PROBE_RESP) {
2562 if (IsPassiveChannel(ieee, network->channel)) {
2563 printk(KERN_INFO "GetScanInfo(): For Global Domain, "
2564 "filter probe response at channel(%d).\n",
2565 network->channel);
2566 goto free_network;
2567 }
2568 }
2569
2570 /* The network parsed correctly -- so now we scan our known networks
2571 * to see if we can find it in our list.
2572 *
2573 * NOTE: This search is definitely not optimized. Once its doing
2574 * the "right thing" we'll optimize it for efficiency if
2575 * necessary */
2576
2577 /* Search for this entry in the list and update it if it is
2578 * already there. */
2579
2580 spin_lock_irqsave(&ieee->lock, flags);
2581 if (is_same_network(&ieee->current_network, network,
2582 (network->ssid_len ? 1 : 0))) {
2583 update_network(&ieee->current_network, network);
2584 if ((ieee->current_network.mode == IEEE_N_24G ||
2585 ieee->current_network.mode == IEEE_G)
2586 && ieee->current_network.berp_info_valid) {
2587 if (ieee->current_network.erp_value & ERP_UseProtection)
2588 ieee->current_network.buseprotection = true;
2589 else
2590 ieee->current_network.buseprotection = false;
2591 }
2592 if (is_beacon(beacon->header.frame_ctl)) {
2593 if (ieee->state >= RTLLIB_LINKED)
2594 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2595 }
2596 }
2597 list_for_each_entry(target, &ieee->network_list, list) {
2598 if (is_same_network(target, network,
2599 (target->ssid_len ? 1 : 0)))
2600 break;
2601 if ((oldest == NULL) ||
2602 (target->last_scanned < oldest->last_scanned))
2603 oldest = target;
2604 }
2605
2606 /* If we didn't find a match, then get a new network slot to initialize
2607 * with this beacon's information */
2608 if (&target->list == &ieee->network_list) {
2609 if (list_empty(&ieee->network_free_list)) {
2610 /* If there are no more slots, expire the oldest */
2611 list_del(&oldest->list);
2612 target = oldest;
2613 RTLLIB_DEBUG_SCAN("Expired '%s' ( %pM) from "
2614 "network list.\n",
2615 escape_essid(target->ssid,
2616 target->ssid_len),
2617 target->bssid);
2618 } else {
2619 /* Otherwise just pull from the free list */
2620 target = list_entry(ieee->network_free_list.next,
2621 struct rtllib_network, list);
2622 list_del(ieee->network_free_list.next);
2623 }
2624
2625
2626 RTLLIB_DEBUG_SCAN("Adding '%s' ( %pM) via %s.\n",
2627 escape_essid(network->ssid,
2628 network->ssid_len), network->bssid,
2629 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2630 RTLLIB_STYPE_PROBE_RESP ?
2631 "PROBE RESPONSE" : "BEACON");
2632 memcpy(target, network, sizeof(*target));
2633 list_add_tail(&target->list, &ieee->network_list);
2634 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2635 rtllib_softmac_new_net(ieee, network);
2636 } else {
2637 RTLLIB_DEBUG_SCAN("Updating '%s' ( %pM) via %s.\n",
2638 escape_essid(target->ssid,
2639 target->ssid_len), target->bssid,
2640 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2641 RTLLIB_STYPE_PROBE_RESP ?
2642 "PROBE RESPONSE" : "BEACON");
2643
2644 /* we have an entry and we are going to update it. But this
2645 * entry may be already expired. In this case we do the same
2646 * as we found a new net and call the new_net handler
2647 */
2648 renew = !time_after(target->last_scanned + ieee->scan_age,
2649 jiffies);
2650 if ((!target->ssid_len) &&
2651 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2652 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2653 (strncmp(ieee->current_network.ssid, network->ssid,
2654 network->ssid_len) == 0) &&
2655 (ieee->state == RTLLIB_NOLINK))))
2656 renew = 1;
2657 update_network(target, network);
2658 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2659 rtllib_softmac_new_net(ieee, network);
2660 }
2661
2662 spin_unlock_irqrestore(&ieee->lock, flags);
2663 if (is_beacon(beacon->header.frame_ctl) &&
2664 is_same_network(&ieee->current_network, network,
2665 (network->ssid_len ? 1 : 0)) &&
2666 (ieee->state == RTLLIB_LINKED)) {
2667 if (ieee->handle_beacon != NULL)
2668 ieee->handle_beacon(ieee->dev, beacon,
2669 &ieee->current_network);
2670 }
2671 free_network:
2672 kfree(network);
2673 return;
2674 }
2675
2676 void rtllib_rx_mgt(struct rtllib_device *ieee,
2677 struct sk_buff *skb,
2678 struct rtllib_rx_stats *stats)
2679 {
2680 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ;
2681
2682 if (WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_PROBE_RESP &&
2683 WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_BEACON)
2684 ieee->last_rx_ps_time = jiffies;
2685
2686 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2687
2688 case RTLLIB_STYPE_BEACON:
2689 RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
2690 WLAN_FC_GET_STYPE(header->frame_ctl));
2691 RTLLIB_DEBUG_SCAN("Beacon\n");
2692 rtllib_process_probe_response(
2693 ieee, (struct rtllib_probe_response *)header,
2694 stats);
2695
2696 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2697 ieee->iw_mode == IW_MODE_INFRA &&
2698 ieee->state == RTLLIB_LINKED))
2699 tasklet_schedule(&ieee->ps_task);
2700
2701 break;
2702
2703 case RTLLIB_STYPE_PROBE_RESP:
2704 RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2705 WLAN_FC_GET_STYPE(header->frame_ctl));
2706 RTLLIB_DEBUG_SCAN("Probe response\n");
2707 rtllib_process_probe_response(ieee,
2708 (struct rtllib_probe_response *)header, stats);
2709 break;
2710 case RTLLIB_STYPE_PROBE_REQ:
2711 RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
2712 WLAN_FC_GET_STYPE(header->frame_ctl));
2713 RTLLIB_DEBUG_SCAN("Probe request\n");
2714 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2715 ((ieee->iw_mode == IW_MODE_ADHOC ||
2716 ieee->iw_mode == IW_MODE_MASTER) &&
2717 ieee->state == RTLLIB_LINKED))
2718 rtllib_rx_probe_rq(ieee, skb);
2719 break;
2720 }
2721 }