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[mirror_ubuntu-zesty-kernel.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 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 = 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 seq=%u last_frag=%u\n",
74 entry->seq, entry->last_frag);
75 dev_kfree_skb_any(entry->skb);
76 entry->skb = NULL;
77 }
78
79 if (entry->skb != NULL && entry->seq == seq &&
80 (entry->last_frag + 1 == frag || frag == -1) &&
81 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
82 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
83 return entry;
84 }
85
86 return NULL;
87 }
88
89 /* Called only as a tasklet (software IRQ) */
90 static struct sk_buff *
91 rtllib_frag_cache_get(struct rtllib_device *ieee,
92 struct rtllib_hdr_4addr *hdr)
93 {
94 struct sk_buff *skb = NULL;
95 u16 fc = le16_to_cpu(hdr->frame_ctl);
96 u16 sc = le16_to_cpu(hdr->seq_ctl);
97 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
98 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
99 struct rtllib_frag_entry *entry;
100 struct rtllib_hdr_3addrqos *hdr_3addrqos;
101 struct rtllib_hdr_4addrqos *hdr_4addrqos;
102 u8 tid;
103
104 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
105 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
106 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
107 tid = UP2AC(tid);
108 tid++;
109 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
110 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
111 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
112 tid = UP2AC(tid);
113 tid++;
114 } else {
115 tid = 0;
116 }
117
118 if (frag == 0) {
119 /* Reserve enough space to fit maximum frame length */
120 skb = dev_alloc_skb(ieee->dev->mtu +
121 sizeof(struct rtllib_hdr_4addr) +
122 8 /* LLC */ +
123 2 /* alignment */ +
124 8 /* WEP */ +
125 ETH_ALEN /* WDS */ +
126 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
127 if (skb == NULL)
128 return NULL;
129
130 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
131 ieee->frag_next_idx[tid]++;
132 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
133 ieee->frag_next_idx[tid] = 0;
134
135 if (entry->skb != NULL)
136 dev_kfree_skb_any(entry->skb);
137
138 entry->first_frag_time = jiffies;
139 entry->seq = seq;
140 entry->last_frag = frag;
141 entry->skb = skb;
142 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
143 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
144 } else {
145 /* received a fragment of a frame for which the head fragment
146 * should have already been received */
147 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
148 hdr->addr1);
149 if (entry != NULL) {
150 entry->last_frag = frag;
151 skb = entry->skb;
152 }
153 }
154
155 return skb;
156 }
157
158
159 /* Called only as a tasklet (software IRQ) */
160 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
161 struct rtllib_hdr_4addr *hdr)
162 {
163 u16 fc = le16_to_cpu(hdr->frame_ctl);
164 u16 sc = le16_to_cpu(hdr->seq_ctl);
165 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
166 struct rtllib_frag_entry *entry;
167 struct rtllib_hdr_3addrqos *hdr_3addrqos;
168 struct rtllib_hdr_4addrqos *hdr_4addrqos;
169 u8 tid;
170
171 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
172 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
173 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
174 tid = UP2AC(tid);
175 tid++;
176 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
177 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
178 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
179 tid = UP2AC(tid);
180 tid++;
181 } else {
182 tid = 0;
183 }
184
185 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
186 hdr->addr1);
187
188 if (entry == NULL) {
189 RTLLIB_DEBUG_FRAG(
190 "could not invalidate fragment cache entry (seq=%u)\n", seq);
191 return -1;
192 }
193
194 entry->skb = NULL;
195 return 0;
196 }
197
198 /* rtllib_rx_frame_mgtmt
199 *
200 * Responsible for handling management control frames
201 *
202 * Called by rtllib_rx */
203 static inline int
204 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
205 struct rtllib_rx_stats *rx_stats, u16 type,
206 u16 stype)
207 {
208 /* On the struct stats definition there is written that
209 * this is not mandatory.... but seems that the probe
210 * response parser uses it
211 */
212 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
213
214 rx_stats->len = skb->len;
215 rtllib_rx_mgt(ieee, skb, rx_stats);
216 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
217 dev_kfree_skb_any(skb);
218 return 0;
219 }
220 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
221
222 dev_kfree_skb_any(skb);
223
224 return 0;
225 }
226
227 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
228 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
229 static unsigned char rfc1042_header[] = {
230 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
231 };
232 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
233 static unsigned char bridge_tunnel_header[] = {
234 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
235 };
236 /* No encapsulation header if EtherType < 0x600 (=length) */
237
238 /* Called by rtllib_rx_frame_decrypt */
239 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
240 struct sk_buff *skb, size_t hdrlen)
241 {
242 struct net_device *dev = ieee->dev;
243 u16 fc, ethertype;
244 struct rtllib_hdr_4addr *hdr;
245 u8 *pos;
246
247 if (skb->len < 24)
248 return 0;
249
250 hdr = (struct rtllib_hdr_4addr *) skb->data;
251 fc = le16_to_cpu(hdr->frame_ctl);
252
253 /* check that the frame is unicast frame to us */
254 if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
255 RTLLIB_FCTL_TODS &&
256 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
257 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
258 /* ToDS frame with own addr BSSID and DA */
259 } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
260 RTLLIB_FCTL_FROMDS &&
261 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
262 /* FromDS frame with own addr as DA */
263 } else
264 return 0;
265
266 if (skb->len < 24 + 8)
267 return 0;
268
269 /* check for port access entity Ethernet type */
270 pos = skb->data + hdrlen;
271 ethertype = (pos[6] << 8) | pos[7];
272 if (ethertype == ETH_P_PAE)
273 return 1;
274
275 return 0;
276 }
277
278 /* Called only as a tasklet (software IRQ), by rtllib_rx */
279 static inline int
280 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
281 struct lib80211_crypt_data *crypt)
282 {
283 struct rtllib_hdr_4addr *hdr;
284 int res, hdrlen;
285
286 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
287 return 0;
288
289 if (ieee->hwsec_active) {
290 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
291
292 tcb_desc->bHwSec = 1;
293
294 if (ieee->need_sw_enc)
295 tcb_desc->bHwSec = 0;
296 }
297
298 hdr = (struct rtllib_hdr_4addr *) skb->data;
299 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
300
301 atomic_inc(&crypt->refcnt);
302 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
303 atomic_dec(&crypt->refcnt);
304 if (res < 0) {
305 RTLLIB_DEBUG_DROP(
306 "decryption failed (SA= %pM) res=%d\n", hdr->addr2, res);
307 if (res == -2)
308 RTLLIB_DEBUG_DROP("Decryption failed ICV mismatch (key %d)\n",
309 skb->data[hdrlen + 3] >> 6);
310 ieee->ieee_stats.rx_discards_undecryptable++;
311 return -1;
312 }
313
314 return res;
315 }
316
317
318 /* Called only as a tasklet (software IRQ), by rtllib_rx */
319 static inline int
320 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
321 int keyidx, struct lib80211_crypt_data *crypt)
322 {
323 struct rtllib_hdr_4addr *hdr;
324 int res, hdrlen;
325
326 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
327 return 0;
328 if (ieee->hwsec_active) {
329 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
330
331 tcb_desc->bHwSec = 1;
332
333 if (ieee->need_sw_enc)
334 tcb_desc->bHwSec = 0;
335 }
336
337 hdr = (struct rtllib_hdr_4addr *) skb->data;
338 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
339
340 atomic_inc(&crypt->refcnt);
341 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
342 atomic_dec(&crypt->refcnt);
343 if (res < 0) {
344 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
345 ieee->dev->name, hdr->addr2, keyidx);
346 return -1;
347 }
348
349 return 0;
350 }
351
352
353 /* this function is stolen from ipw2200 driver*/
354 #define IEEE_PACKET_RETRY_TIME (5*HZ)
355 static int is_duplicate_packet(struct rtllib_device *ieee,
356 struct rtllib_hdr_4addr *header)
357 {
358 u16 fc = le16_to_cpu(header->frame_ctl);
359 u16 sc = le16_to_cpu(header->seq_ctl);
360 u16 seq = WLAN_GET_SEQ_SEQ(sc);
361 u16 frag = WLAN_GET_SEQ_FRAG(sc);
362 u16 *last_seq, *last_frag;
363 unsigned long *last_time;
364 struct rtllib_hdr_3addrqos *hdr_3addrqos;
365 struct rtllib_hdr_4addrqos *hdr_4addrqos;
366 u8 tid;
367
368 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
369 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
370 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
371 tid = UP2AC(tid);
372 tid++;
373 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
374 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
375 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
376 tid = UP2AC(tid);
377 tid++;
378 } else {
379 tid = 0;
380 }
381
382 switch (ieee->iw_mode) {
383 case IW_MODE_ADHOC:
384 {
385 struct list_head *p;
386 struct ieee_ibss_seq *entry = NULL;
387 u8 *mac = header->addr2;
388 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
389
390 list_for_each(p, &ieee->ibss_mac_hash[index]) {
391 entry = list_entry(p, struct ieee_ibss_seq, list);
392 if (!memcmp(entry->mac, mac, ETH_ALEN))
393 break;
394 }
395 if (p == &ieee->ibss_mac_hash[index]) {
396 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
397 if (!entry) {
398 printk(KERN_WARNING "Cannot malloc new mac entry\n");
399 return 0;
400 }
401 memcpy(entry->mac, mac, ETH_ALEN);
402 entry->seq_num[tid] = seq;
403 entry->frag_num[tid] = frag;
404 entry->packet_time[tid] = jiffies;
405 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
406 return 0;
407 }
408 last_seq = &entry->seq_num[tid];
409 last_frag = &entry->frag_num[tid];
410 last_time = &entry->packet_time[tid];
411 break;
412 }
413
414 case IW_MODE_INFRA:
415 last_seq = &ieee->last_rxseq_num[tid];
416 last_frag = &ieee->last_rxfrag_num[tid];
417 last_time = &ieee->last_packet_time[tid];
418 break;
419 default:
420 return 0;
421 }
422
423 if ((*last_seq == seq) &&
424 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
425 if (*last_frag == frag)
426 goto drop;
427 if (*last_frag + 1 != frag)
428 /* out-of-order fragment */
429 goto drop;
430 } else
431 *last_seq = seq;
432
433 *last_frag = frag;
434 *last_time = jiffies;
435 return 0;
436
437 drop:
438
439 return 1;
440 }
441
442 static bool AddReorderEntry(struct rx_ts_record *pTS,
443 struct rx_reorder_entry *pReorderEntry)
444 {
445 struct list_head *pList = &pTS->RxPendingPktList;
446
447 while (pList->next != &pTS->RxPendingPktList) {
448 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
449 list_entry(pList->next, struct rx_reorder_entry,
450 List))->SeqNum))
451 pList = pList->next;
452 else if (SN_EQUAL(pReorderEntry->SeqNum,
453 ((struct rx_reorder_entry *)list_entry(pList->next,
454 struct rx_reorder_entry, List))->SeqNum))
455 return false;
456 else
457 break;
458 }
459 pReorderEntry->List.next = pList->next;
460 pReorderEntry->List.next->prev = &pReorderEntry->List;
461 pReorderEntry->List.prev = pList;
462 pList->next = &pReorderEntry->List;
463
464 return true;
465 }
466
467 void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb **prxbIndicateArray, u8 index)
468 {
469 struct net_device_stats *stats = &ieee->stats;
470 u8 i = 0 , j = 0;
471 u16 ethertype;
472
473 for (j = 0; j < index; j++) {
474 struct rtllib_rxb *prxb = prxbIndicateArray[j];
475
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 = 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 /* Indicate 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 is %d, WinSize is %d\n", __func__, SeqNum,
558 pTS->RxIndicateSeq, WinSize);
559
560 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
561
562 WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
563 /* Rx Reorder initialize condition.*/
564 if (pTS->RxIndicateSeq == 0xffff)
565 pTS->RxIndicateSeq = SeqNum;
566
567 /* Drop out the packet which SeqNum is smaller than WinStart */
568 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
569 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
570 pTS->RxIndicateSeq, SeqNum);
571 pHTInfo->RxReorderDropCounter++;
572 {
573 int i;
574
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, NewSeq: %d\n", pTS->RxIndicateSeq, SeqNum);
598 }
599
600 /*
601 * Indication process.
602 * After Packet dropping and Sliding Window shifting as above, we can
603 * now just indicate the packets with the SeqNum smaller than latest
604 * WinStart and struct buffer other packets.
605 */
606 /* For Rx Reorder condition:
607 * 1. All packets with SeqNum smaller than WinStart => Indicate
608 * 2. All packets with SeqNum larger than or equal to
609 * WinStart => Buffer it.
610 */
611 if (bMatchWinStart) {
612 /* Current packet is going to be indicated.*/
613 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",
614 pTS->RxIndicateSeq, SeqNum);
615 ieee->prxbIndicateArray[0] = prxb;
616 index = 1;
617 } else {
618 /* Current packet is going to be inserted into pending list.*/
619 if (!list_empty(&ieee->RxReorder_Unused_List)) {
620 pReorderEntry = (struct rx_reorder_entry *)
621 list_entry(ieee->RxReorder_Unused_List.next,
622 struct rx_reorder_entry, List);
623 list_del_init(&pReorderEntry->List);
624
625 /* Make a reorder entry and insert into a the packet list.*/
626 pReorderEntry->SeqNum = SeqNum;
627 pReorderEntry->prxb = prxb;
628
629 if (!AddReorderEntry(pTS, pReorderEntry)) {
630 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
631 "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
632 __func__, pTS->RxIndicateSeq,
633 SeqNum);
634 list_add_tail(&pReorderEntry->List,
635 &ieee->RxReorder_Unused_List); {
636 int i;
637
638 for (i = 0; i < prxb->nr_subframes; i++)
639 dev_kfree_skb(prxb->subframes[i]);
640 kfree(prxb);
641 prxb = NULL;
642 }
643 } else {
644 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
645 "Pkt insert into struct buffer!! IndicateSeq: %d, NewSeq: %d\n",
646 pTS->RxIndicateSeq, SeqNum);
647 }
648 } else {
649 /*
650 * Packets are dropped if there are not enough reorder
651 * entries. This part should be modified!! We can just
652 * indicate all the packets in struct buffer and get
653 * reorder entries.
654 */
655 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
656 {
657 int i;
658
659 for (i = 0; i < prxb->nr_subframes; i++)
660 dev_kfree_skb(prxb->subframes[i]);
661 kfree(prxb);
662 prxb = NULL;
663 }
664 }
665 }
666
667 /* Check if there is any packet need indicate.*/
668 while (!list_empty(&pTS->RxPendingPktList)) {
669 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
670
671 pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,
672 struct rx_reorder_entry, List);
673 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
674 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
675 /* This protect struct buffer from overflow. */
676 if (index >= REORDER_WIN_SIZE) {
677 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!!\n");
678 bPktInBuf = true;
679 break;
680 }
681
682 list_del_init(&pReorderEntry->List);
683
684 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
685 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
686
687 ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
688 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pReorderEntry->SeqNum);
689 index++;
690
691 list_add_tail(&pReorderEntry->List,
692 &ieee->RxReorder_Unused_List);
693 } else {
694 bPktInBuf = true;
695 break;
696 }
697 }
698
699 /* Handling pending timer. Set this timer to prevent from long time
700 * Rx buffering.*/
701 if (index > 0) {
702 if (timer_pending(&pTS->RxPktPendingTimer))
703 del_timer_sync(&pTS->RxPktPendingTimer);
704 pTS->RxTimeoutIndicateSeq = 0xffff;
705
706 if (index > REORDER_WIN_SIZE) {
707 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder struct buffer full!!\n");
708 spin_unlock_irqrestore(&(ieee->reorder_spinlock),
709 flags);
710 return;
711 }
712 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
713 bPktInBuf = false;
714 }
715
716 if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
717 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): SET rx timeout timer\n",
718 __func__);
719 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
720 mod_timer(&pTS->RxPktPendingTimer, jiffies +
721 MSECS(pHTInfo->RxReorderPendingTime));
722 }
723 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
724 }
725
726 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
727 struct rtllib_rx_stats *rx_stats,
728 struct rtllib_rxb *rxb, u8 *src, u8 *dst)
729 {
730 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
731 u16 fc = le16_to_cpu(hdr->frame_ctl);
732
733 u16 LLCOffset = sizeof(struct rtllib_hdr_3addr);
734 u16 ChkLength;
735 bool bIsAggregateFrame = false;
736 u16 nSubframe_Length;
737 u8 nPadding_Length = 0;
738 u16 SeqNum = 0;
739 struct sk_buff *sub_skb;
740 u8 *data_ptr;
741 /* just for debug purpose */
742 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
743 if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
744 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
745 bIsAggregateFrame = true;
746
747 if (RTLLIB_QOS_HAS_SEQ(fc))
748 LLCOffset += 2;
749 if (rx_stats->bContainHTC)
750 LLCOffset += sHTCLng;
751
752 ChkLength = LLCOffset;
753
754 if (skb->len <= ChkLength)
755 return 0;
756
757 skb_pull(skb, LLCOffset);
758 ieee->bIsAggregateFrame = bIsAggregateFrame;
759 if (!bIsAggregateFrame) {
760 rxb->nr_subframes = 1;
761
762 /* altered by clark 3/30/2010
763 * The struct buffer size of the skb indicated to upper layer
764 * must be less than 5000, or the defraged IP datagram
765 * in the IP layer will exceed "ipfrag_high_tresh" and be
766 * discarded. so there must not use the function
767 * "skb_copy" and "skb_clone" for "skb".
768 */
769
770 /* Allocate new skb for releasing to upper layer */
771 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
772 if (!sub_skb)
773 return 0;
774 skb_reserve(sub_skb, 12);
775 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
776 memcpy(data_ptr, skb->data, skb->len);
777 sub_skb->dev = ieee->dev;
778
779 rxb->subframes[0] = sub_skb;
780
781 memcpy(rxb->src, src, ETH_ALEN);
782 memcpy(rxb->dst, dst, ETH_ALEN);
783 rxb->subframes[0]->dev = ieee->dev;
784 return 1;
785 } else {
786 rxb->nr_subframes = 0;
787 memcpy(rxb->src, src, ETH_ALEN);
788 memcpy(rxb->dst, dst, ETH_ALEN);
789 while (skb->len > ETHERNET_HEADER_SIZE) {
790 /* Offset 12 denote 2 mac address */
791 nSubframe_Length = *((u16 *)(skb->data + 12));
792 nSubframe_Length = (nSubframe_Length >> 8) +
793 (nSubframe_Length << 8);
794
795 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
796 printk(KERN_INFO "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
797 __func__, rxb->nr_subframes);
798 printk(KERN_INFO "%s: A-MSDU parse error!! Subframe Length: %d\n", __func__,
799 nSubframe_Length);
800 printk(KERN_INFO "nRemain_Length is %d and nSubframe_Length is : %d\n", skb->len,
801 nSubframe_Length);
802 printk(KERN_INFO "The Packet SeqNum is %d\n", SeqNum);
803 return 0;
804 }
805
806 /* move the data point to data content */
807 skb_pull(skb, ETHERNET_HEADER_SIZE);
808
809 /* altered by clark 3/30/2010
810 * The struct buffer size of the skb indicated to upper layer
811 * must be less than 5000, or the defraged IP datagram
812 * in the IP layer will exceed "ipfrag_high_tresh" and be
813 * discarded. so there must not use the function
814 * "skb_copy" and "skb_clone" for "skb".
815 */
816
817 /* Allocate new skb for releasing to upper layer */
818 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
819 if (!sub_skb)
820 return 0;
821 skb_reserve(sub_skb, 12);
822 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
823 memcpy(data_ptr, skb->data, nSubframe_Length);
824
825 sub_skb->dev = ieee->dev;
826 rxb->subframes[rxb->nr_subframes++] = sub_skb;
827 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
828 RTLLIB_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
829 break;
830 }
831 skb_pull(skb, nSubframe_Length);
832
833 if (skb->len != 0) {
834 nPadding_Length = 4 - ((nSubframe_Length +
835 ETHERNET_HEADER_SIZE) % 4);
836 if (nPadding_Length == 4)
837 nPadding_Length = 0;
838
839 if (skb->len < nPadding_Length)
840 return 0;
841
842 skb_pull(skb, nPadding_Length);
843 }
844 }
845
846 return rxb->nr_subframes;
847 }
848 }
849
850
851 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
852 struct sk_buff *skb,
853 struct rtllib_rx_stats *rx_stats)
854 {
855 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
856 u16 fc = le16_to_cpu(hdr->frame_ctl);
857 size_t hdrlen = 0;
858
859 hdrlen = rtllib_get_hdrlen(fc);
860 if (HTCCheck(ieee, skb->data)) {
861 if (net_ratelimit())
862 printk(KERN_INFO "%s: find HTCControl!\n", __func__);
863 hdrlen += 4;
864 rx_stats->bContainHTC = true;
865 }
866
867 if (RTLLIB_QOS_HAS_SEQ(fc))
868 rx_stats->bIsQosData = true;
869
870 return hdrlen;
871 }
872
873 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
874 struct sk_buff *skb, u8 multicast)
875 {
876 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
877 u16 fc, sc;
878 u8 frag, type, stype;
879
880 fc = le16_to_cpu(hdr->frame_ctl);
881 type = WLAN_FC_GET_TYPE(fc);
882 stype = WLAN_FC_GET_STYPE(fc);
883 sc = le16_to_cpu(hdr->seq_ctl);
884 frag = WLAN_GET_SEQ_FRAG(sc);
885
886 if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
887 !ieee->current_network.qos_data.active ||
888 !IsDataFrame(skb->data) ||
889 IsLegacyDataFrame(skb->data)) {
890 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))) {
891 if (is_duplicate_packet(ieee, hdr))
892 return -1;
893 }
894 } else {
895 struct rx_ts_record *pRxTS = NULL;
896
897 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
898 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
899 if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
900 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum))
901 return -1;
902 pRxTS->RxLastFragNum = frag;
903 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
904 } else {
905 RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip the check!!\n", __func__);
906 return -1;
907 }
908 }
909
910 return 0;
911 }
912
913 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
914 struct rtllib_hdr_4addr *hdr, u8 *dst,
915 u8 *src, u8 *bssid)
916 {
917 u16 fc = le16_to_cpu(hdr->frame_ctl);
918
919 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
920 case RTLLIB_FCTL_FROMDS:
921 memcpy(dst, hdr->addr1, ETH_ALEN);
922 memcpy(src, hdr->addr3, ETH_ALEN);
923 memcpy(bssid, hdr->addr2, ETH_ALEN);
924 break;
925 case RTLLIB_FCTL_TODS:
926 memcpy(dst, hdr->addr3, ETH_ALEN);
927 memcpy(src, hdr->addr2, ETH_ALEN);
928 memcpy(bssid, hdr->addr1, ETH_ALEN);
929 break;
930 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
931 memcpy(dst, hdr->addr3, ETH_ALEN);
932 memcpy(src, hdr->addr4, ETH_ALEN);
933 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
934 break;
935 case 0:
936 memcpy(dst, hdr->addr1, ETH_ALEN);
937 memcpy(src, hdr->addr2, ETH_ALEN);
938 memcpy(bssid, hdr->addr3, ETH_ALEN);
939 break;
940 }
941 }
942
943 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
944 u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
945 {
946 u8 type, stype;
947
948 type = WLAN_FC_GET_TYPE(fc);
949 stype = WLAN_FC_GET_STYPE(fc);
950
951 /* Filter frames from different BSS */
952 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
953 !ether_addr_equal(ieee->current_network.bssid, bssid) &&
954 !is_zero_ether_addr(ieee->current_network.bssid)) {
955 return -1;
956 }
957
958 /* Filter packets sent by an STA that will be forwarded by AP */
959 if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
960 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
961 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
962 !ether_addr_equal(dst, ieee->current_network.bssid) &&
963 ether_addr_equal(bssid, ieee->current_network.bssid)) {
964 return -1;
965 }
966 }
967
968 /* Nullfunc frames may have PS-bit set, so they must be passed to
969 * hostap_handle_sta_rx() before being dropped here. */
970 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
971 if (stype != RTLLIB_STYPE_DATA &&
972 stype != RTLLIB_STYPE_DATA_CFACK &&
973 stype != RTLLIB_STYPE_DATA_CFPOLL &&
974 stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
975 stype != RTLLIB_STYPE_QOS_DATA) {
976 if (stype != RTLLIB_STYPE_NULLFUNC)
977 RTLLIB_DEBUG_DROP(
978 "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
979 type, stype);
980 return -1;
981 }
982 }
983
984 if (ieee->iw_mode != IW_MODE_MESH) {
985 /* packets from our adapter are dropped (echo) */
986 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
987 return -1;
988
989 /* {broad,multi}cast packets to our BSS go through */
990 if (is_multicast_ether_addr(dst)) {
991 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
992 return -1;
993 }
994 }
995 return 0;
996 }
997
998 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
999 struct lib80211_crypt_data **crypt, size_t hdrlen)
1000 {
1001 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1002 u16 fc = le16_to_cpu(hdr->frame_ctl);
1003 int idx = 0;
1004
1005 if (ieee->host_decrypt) {
1006 if (skb->len >= hdrlen + 3)
1007 idx = skb->data[hdrlen + 3] >> 6;
1008
1009 *crypt = ieee->crypt_info.crypt[idx];
1010 /* allow NULL decrypt to indicate an station specific override
1011 * for default encryption */
1012 if (*crypt && ((*crypt)->ops == NULL ||
1013 (*crypt)->ops->decrypt_mpdu == NULL))
1014 *crypt = NULL;
1015
1016 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1017 /* This seems to be triggered by some (multicast?)
1018 * frames from other than current BSS, so just drop the
1019 * frames silently instead of filling system log with
1020 * these reports. */
1021 RTLLIB_DEBUG_DROP("Decryption failed (not set) (SA= %pM)\n",
1022 hdr->addr2);
1023 ieee->ieee_stats.rx_discards_undecryptable++;
1024 return -1;
1025 }
1026 }
1027
1028 return 0;
1029 }
1030
1031 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1032 struct rtllib_rx_stats *rx_stats,
1033 struct lib80211_crypt_data *crypt, size_t hdrlen)
1034 {
1035 struct rtllib_hdr_4addr *hdr;
1036 int keyidx = 0;
1037 u16 fc, sc;
1038 u8 frag;
1039
1040 hdr = (struct rtllib_hdr_4addr *)skb->data;
1041 fc = le16_to_cpu(hdr->frame_ctl);
1042 sc = le16_to_cpu(hdr->seq_ctl);
1043 frag = WLAN_GET_SEQ_FRAG(sc);
1044
1045 if ((!rx_stats->Decrypted))
1046 ieee->need_sw_enc = 1;
1047 else
1048 ieee->need_sw_enc = 0;
1049
1050 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1051 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1052 printk(KERN_INFO "%s: decrypt frame error\n", __func__);
1053 return -1;
1054 }
1055
1056 hdr = (struct rtllib_hdr_4addr *) skb->data;
1057 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1058 int flen;
1059 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1060
1061 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1062
1063 if (!frag_skb) {
1064 RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1065 "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
1066 (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1067 WLAN_GET_SEQ_SEQ(sc), frag);
1068 return -1;
1069 }
1070 flen = skb->len;
1071 if (frag != 0)
1072 flen -= hdrlen;
1073
1074 if (frag_skb->tail + flen > frag_skb->end) {
1075 printk(KERN_WARNING "%s: host decrypted and reassembled frame did not fit skb\n",
1076 __func__);
1077 rtllib_frag_cache_invalidate(ieee, hdr);
1078 return -1;
1079 }
1080
1081 if (frag == 0) {
1082 /* copy first fragment (including full headers) into
1083 * beginning of the fragment cache skb */
1084 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1085 } else {
1086 /* append frame payload to the end of the fragment
1087 * cache skb */
1088 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1089 flen);
1090 }
1091 dev_kfree_skb_any(skb);
1092 skb = NULL;
1093
1094 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1095 /* more fragments expected - leave the skb in fragment
1096 * cache for now; it will be delivered to upper layers
1097 * after all fragments have been received */
1098 return -2;
1099 }
1100
1101 /* this was the last fragment and the frame will be
1102 * delivered, so remove skb from fragment cache */
1103 skb = frag_skb;
1104 hdr = (struct rtllib_hdr_4addr *) skb->data;
1105 rtllib_frag_cache_invalidate(ieee, hdr);
1106 }
1107
1108 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1109 * encrypted/authenticated */
1110 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1111 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1112 printk(KERN_INFO "%s: ==>decrypt msdu error\n", __func__);
1113 return -1;
1114 }
1115
1116 hdr = (struct rtllib_hdr_4addr *) skb->data;
1117 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1118 if (/*ieee->ieee802_1x &&*/
1119 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1120
1121 /* pass unencrypted EAPOL frames even if encryption is
1122 * configured */
1123 struct eapol *eap = (struct eapol *)(skb->data +
1124 24);
1125 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1126 eap_get_type(eap->type));
1127 } else {
1128 RTLLIB_DEBUG_DROP(
1129 "encryption configured, but RX frame not encrypted (SA= %pM)\n",
1130 hdr->addr2);
1131 return -1;
1132 }
1133 }
1134
1135 if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1136 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1137 struct eapol *eap = (struct eapol *)(skb->data +
1138 24);
1139 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1140 eap_get_type(eap->type));
1141 }
1142
1143 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1144 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1145 RTLLIB_DEBUG_DROP(
1146 "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
1147 hdr->addr2);
1148 return -1;
1149 }
1150
1151 if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1152 printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n");
1153
1154 return 0;
1155 }
1156
1157 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
1158 {
1159 if (unicast) {
1160
1161 if ((ieee->state == RTLLIB_LINKED)) {
1162 if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1163 ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1164 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1165 if (ieee->LeisurePSLeave)
1166 ieee->LeisurePSLeave(ieee->dev);
1167 }
1168 }
1169 }
1170 ieee->last_rx_ps_time = jiffies;
1171 }
1172
1173 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1174 struct rtllib_rx_stats *rx_stats,
1175 struct rtllib_rxb *rxb,
1176 u8 *dst,
1177 u8 *src)
1178 {
1179 struct net_device *dev = ieee->dev;
1180 u16 ethertype;
1181 int i = 0;
1182
1183 if (rxb == NULL) {
1184 printk(KERN_INFO "%s: rxb is NULL!!\n", __func__);
1185 return ;
1186 }
1187
1188 for (i = 0; i < rxb->nr_subframes; i++) {
1189 struct sk_buff *sub_skb = rxb->subframes[i];
1190
1191 if (sub_skb) {
1192 /* convert hdr + possible LLC headers into Ethernet header */
1193 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1194 if (sub_skb->len >= 8 &&
1195 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1196 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1197 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1198 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1199 * replace EtherType */
1200 skb_pull(sub_skb, SNAP_SIZE);
1201 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1202 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1203 } else {
1204 u16 len;
1205 /* Leave Ethernet header part of hdr and full payload */
1206 len = sub_skb->len;
1207 memcpy(skb_push(sub_skb, 2), &len, 2);
1208 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1209 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1210 }
1211
1212 ieee->stats.rx_packets++;
1213 ieee->stats.rx_bytes += sub_skb->len;
1214
1215 if (is_multicast_ether_addr(dst))
1216 ieee->stats.multicast++;
1217
1218 /* Indicate the packets to upper layer */
1219 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1220 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1221 sub_skb->dev = dev;
1222 sub_skb->dev->stats.rx_packets++;
1223 sub_skb->dev->stats.rx_bytes += sub_skb->len;
1224 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1225 netif_rx(sub_skb);
1226 }
1227 }
1228 kfree(rxb);
1229 rxb = NULL;
1230 }
1231
1232 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1233 struct rtllib_rx_stats *rx_stats)
1234 {
1235 struct net_device *dev = ieee->dev;
1236 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1237 struct lib80211_crypt_data *crypt = NULL;
1238 struct rtllib_rxb *rxb = NULL;
1239 struct rx_ts_record *pTS = NULL;
1240 u16 fc, sc, SeqNum = 0;
1241 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1242 u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
1243 size_t hdrlen = 0;
1244 bool bToOtherSTA = false;
1245 int ret = 0, i = 0;
1246
1247 hdr = (struct rtllib_hdr_4addr *)skb->data;
1248 fc = le16_to_cpu(hdr->frame_ctl);
1249 type = WLAN_FC_GET_TYPE(fc);
1250 stype = WLAN_FC_GET_STYPE(fc);
1251 sc = le16_to_cpu(hdr->seq_ctl);
1252
1253 /*Filter pkt not to me*/
1254 multicast = is_multicast_ether_addr(hdr->addr1);
1255 unicast = !multicast;
1256 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1257 if (ieee->bNetPromiscuousMode)
1258 bToOtherSTA = true;
1259 else
1260 goto rx_dropped;
1261 }
1262
1263 /*Filter pkt has too small length */
1264 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1265 if (skb->len < hdrlen) {
1266 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1267 goto rx_dropped;
1268 }
1269
1270 /* Filter Duplicate pkt */
1271 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1272 if (ret < 0)
1273 goto rx_dropped;
1274
1275 /* Filter CTRL Frame */
1276 if (type == RTLLIB_FTYPE_CTL)
1277 goto rx_dropped;
1278
1279 /* Filter MGNT Frame */
1280 if (type == RTLLIB_FTYPE_MGMT) {
1281 if (bToOtherSTA)
1282 goto rx_dropped;
1283 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1284 goto rx_dropped;
1285 else
1286 goto rx_exit;
1287 }
1288
1289 /* Filter WAPI DATA Frame */
1290
1291 /* Update statstics for AP roaming */
1292 if (!bToOtherSTA) {
1293 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1294 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1295 }
1296 dev->last_rx = jiffies;
1297
1298 /* Data frame - extract src/dst addresses */
1299 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1300
1301 /* Filter Data frames */
1302 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1303 if (ret < 0)
1304 goto rx_dropped;
1305
1306 if (skb->len == hdrlen)
1307 goto rx_dropped;
1308
1309 /* Send pspoll based on moredata */
1310 if ((ieee->iw_mode == IW_MODE_INFRA) && (ieee->sta_sleep == LPS_IS_SLEEP)
1311 && (ieee->polling) && (!bToOtherSTA)) {
1312 if (WLAN_FC_MORE_DATA(fc)) {
1313 /* more data bit is set, let's request a new frame from the AP */
1314 rtllib_sta_ps_send_pspoll_frame(ieee);
1315 } else {
1316 ieee->polling = false;
1317 }
1318 }
1319
1320 /* Get crypt if encrypted */
1321 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1322 if (ret == -1)
1323 goto rx_dropped;
1324
1325 /* Decrypt data frame (including reassemble) */
1326 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1327 if (ret == -1)
1328 goto rx_dropped;
1329 else if (ret == -2)
1330 goto rx_exit;
1331
1332 /* Get TS for Rx Reorder */
1333 hdr = (struct rtllib_hdr_4addr *) skb->data;
1334 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1335 && !is_multicast_ether_addr(hdr->addr1)
1336 && (!bToOtherSTA)) {
1337 TID = Frame_QoSTID(skb->data);
1338 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1339 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, RX_DIR, true);
1340 if (TID != 0 && TID != 3)
1341 ieee->bis_any_nonbepkts = true;
1342 }
1343
1344 /* Parse rx data frame (For AMSDU) */
1345 /* skb: hdr + (possible reassembled) full plaintext payload */
1346 payload = skb->data + hdrlen;
1347 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1348 if (rxb == NULL) {
1349 RTLLIB_DEBUG(RTLLIB_DL_ERR,
1350 "%s(): kmalloc rxb error\n", __func__);
1351 goto rx_dropped;
1352 }
1353 /* to parse amsdu packets */
1354 /* qos data packets & reserved bit is 1 */
1355 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1356 /* only to free rxb, and not submit the packets to upper layer */
1357 for (i = 0; i < rxb->nr_subframes; i++)
1358 dev_kfree_skb(rxb->subframes[i]);
1359 kfree(rxb);
1360 rxb = NULL;
1361 goto rx_dropped;
1362 }
1363
1364 /* Update WAPI PN */
1365
1366 /* Check if leave LPS */
1367 if (!bToOtherSTA) {
1368 if (ieee->bIsAggregateFrame)
1369 nr_subframes = rxb->nr_subframes;
1370 else
1371 nr_subframes = 1;
1372 if (unicast)
1373 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1374 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1375 }
1376
1377 /* Indicate packets to upper layer or Rx Reorder */
1378 if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || bToOtherSTA)
1379 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1380 else
1381 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1382
1383 dev_kfree_skb(skb);
1384
1385 rx_exit:
1386 return 1;
1387
1388 rx_dropped:
1389 ieee->stats.rx_dropped++;
1390
1391 /* Returning 0 indicates to caller that we have not handled the SKB--
1392 * so it is still allocated and can be used again by underlying
1393 * hardware as a DMA target */
1394 return 0;
1395 }
1396
1397 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1398 struct rtllib_rx_stats *rx_stats)
1399 {
1400 return 0;
1401 }
1402
1403 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1404 struct rtllib_rx_stats *rx_stats)
1405 {
1406 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1407 u16 fc = le16_to_cpu(hdr->frame_ctl);
1408 size_t hdrlen = rtllib_get_hdrlen(fc);
1409
1410 if (skb->len < hdrlen) {
1411 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1412 return 0;
1413 }
1414
1415 if (HTCCheck(ieee, skb->data)) {
1416 if (net_ratelimit())
1417 printk(KERN_INFO "%s: Find HTCControl!\n", __func__);
1418 hdrlen += 4;
1419 }
1420
1421 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1422 ieee->stats.rx_packets++;
1423 ieee->stats.rx_bytes += skb->len;
1424
1425 return 1;
1426 }
1427
1428 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1429 struct rtllib_rx_stats *rx_stats)
1430 {
1431 return 0;
1432 }
1433
1434 /* All received frames are sent to this function. @skb contains the frame in
1435 * IEEE 802.11 format, i.e., in the format it was sent over air.
1436 * This function is called only as a tasklet (software IRQ). */
1437 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1438 struct rtllib_rx_stats *rx_stats)
1439 {
1440 int ret = 0;
1441
1442 if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1443 printk(KERN_INFO "%s: Input parameters NULL!\n", __func__);
1444 goto rx_dropped;
1445 }
1446 if (skb->len < 10) {
1447 printk(KERN_INFO "%s: SKB length < 10\n", __func__);
1448 goto rx_dropped;
1449 }
1450
1451 switch (ieee->iw_mode) {
1452 case IW_MODE_ADHOC:
1453 case IW_MODE_INFRA:
1454 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1455 break;
1456 case IW_MODE_MASTER:
1457 case IW_MODE_REPEAT:
1458 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1459 break;
1460 case IW_MODE_MONITOR:
1461 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1462 break;
1463 case IW_MODE_MESH:
1464 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1465 break;
1466 default:
1467 printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__);
1468 break;
1469 }
1470
1471 return ret;
1472
1473 rx_dropped:
1474 if (ieee)
1475 ieee->stats.rx_dropped++;
1476 return 0;
1477 }
1478 EXPORT_SYMBOL(rtllib_rx);
1479
1480 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1481
1482 /*
1483 * Make ther structure we read from the beacon packet has
1484 * the right values
1485 */
1486 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1487 *info_element, int sub_type)
1488 {
1489
1490 if (info_element->qui_subtype != sub_type)
1491 return -1;
1492 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1493 return -1;
1494 if (info_element->qui_type != QOS_OUI_TYPE)
1495 return -1;
1496 if (info_element->version != QOS_VERSION_1)
1497 return -1;
1498
1499 return 0;
1500 }
1501
1502
1503 /*
1504 * Parse a QoS parameter element
1505 */
1506 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1507 *element_param, struct rtllib_info_element
1508 *info_element)
1509 {
1510 int ret = 0;
1511 u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1512
1513 if ((info_element == NULL) || (element_param == NULL))
1514 return -1;
1515
1516 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1517 memcpy(element_param->info_element.qui, info_element->data,
1518 info_element->len);
1519 element_param->info_element.elementID = info_element->id;
1520 element_param->info_element.length = info_element->len;
1521 } else
1522 ret = -1;
1523 if (ret == 0)
1524 ret = rtllib_verify_qos_info(&element_param->info_element,
1525 QOS_OUI_PARAM_SUB_TYPE);
1526 return ret;
1527 }
1528
1529 /*
1530 * Parse a QoS information element
1531 */
1532 static int rtllib_read_qos_info_element(struct
1533 rtllib_qos_information_element
1534 *element_info, struct rtllib_info_element
1535 *info_element)
1536 {
1537 int ret = 0;
1538 u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1539
1540 if (element_info == NULL)
1541 return -1;
1542 if (info_element == NULL)
1543 return -1;
1544
1545 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1546 memcpy(element_info->qui, info_element->data,
1547 info_element->len);
1548 element_info->elementID = info_element->id;
1549 element_info->length = info_element->len;
1550 } else
1551 ret = -1;
1552
1553 if (ret == 0)
1554 ret = rtllib_verify_qos_info(element_info,
1555 QOS_OUI_INFO_SUB_TYPE);
1556 return ret;
1557 }
1558
1559
1560 /*
1561 * Write QoS parameters from the ac parameters.
1562 */
1563 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1564 struct rtllib_qos_data *qos_data)
1565 {
1566 struct rtllib_qos_ac_parameter *ac_params;
1567 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1568 int i;
1569 u8 aci;
1570 u8 acm;
1571
1572 qos_data->wmm_acm = 0;
1573 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1574 ac_params = &(param_elm->ac_params_record[i]);
1575
1576 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1577 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1578
1579 if (aci >= QOS_QUEUE_NUM)
1580 continue;
1581 switch (aci) {
1582 case 1:
1583 /* BIT(0) | BIT(3) */
1584 if (acm)
1585 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1586 break;
1587 case 2:
1588 /* BIT(4) | BIT(5) */
1589 if (acm)
1590 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1591 break;
1592 case 3:
1593 /* BIT(6) | BIT(7) */
1594 if (acm)
1595 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1596 break;
1597 case 0:
1598 default:
1599 /* BIT(1) | BIT(2) */
1600 if (acm)
1601 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1602 break;
1603 }
1604
1605 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1606
1607 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1608 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1609
1610 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1611
1612 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1613
1614 qos_param->flag[aci] =
1615 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1616 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1617 }
1618 return 0;
1619 }
1620
1621 /*
1622 * we have a generic data element which it may contain QoS information or
1623 * parameters element. check the information element length to decide
1624 * which type to read
1625 */
1626 static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
1627 *info_element,
1628 struct rtllib_network *network)
1629 {
1630 int rc = 0;
1631 struct rtllib_qos_information_element qos_info_element;
1632
1633 rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1634
1635 if (rc == 0) {
1636 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1637 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1638 } else {
1639 struct rtllib_qos_parameter_info param_element;
1640
1641 rc = rtllib_read_qos_param_element(&param_element,
1642 info_element);
1643 if (rc == 0) {
1644 rtllib_qos_convert_ac_to_parameters(&param_element,
1645 &(network->qos_data));
1646 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1647 network->qos_data.param_count =
1648 param_element.info_element.ac_info & 0x0F;
1649 }
1650 }
1651
1652 if (rc == 0) {
1653 RTLLIB_DEBUG_QOS("QoS is supported\n");
1654 network->qos_data.supported = 1;
1655 }
1656 return rc;
1657 }
1658
1659 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1660
1661 static const char *get_info_element_string(u16 id)
1662 {
1663 switch (id) {
1664 MFIE_STRING(SSID);
1665 MFIE_STRING(RATES);
1666 MFIE_STRING(FH_SET);
1667 MFIE_STRING(DS_SET);
1668 MFIE_STRING(CF_SET);
1669 MFIE_STRING(TIM);
1670 MFIE_STRING(IBSS_SET);
1671 MFIE_STRING(COUNTRY);
1672 MFIE_STRING(HOP_PARAMS);
1673 MFIE_STRING(HOP_TABLE);
1674 MFIE_STRING(REQUEST);
1675 MFIE_STRING(CHALLENGE);
1676 MFIE_STRING(POWER_CONSTRAINT);
1677 MFIE_STRING(POWER_CAPABILITY);
1678 MFIE_STRING(TPC_REQUEST);
1679 MFIE_STRING(TPC_REPORT);
1680 MFIE_STRING(SUPP_CHANNELS);
1681 MFIE_STRING(CSA);
1682 MFIE_STRING(MEASURE_REQUEST);
1683 MFIE_STRING(MEASURE_REPORT);
1684 MFIE_STRING(QUIET);
1685 MFIE_STRING(IBSS_DFS);
1686 MFIE_STRING(RSN);
1687 MFIE_STRING(RATES_EX);
1688 MFIE_STRING(GENERIC);
1689 MFIE_STRING(QOS_PARAMETER);
1690 default:
1691 return "UNKNOWN";
1692 }
1693 }
1694
1695 static inline void rtllib_extract_country_ie(
1696 struct rtllib_device *ieee,
1697 struct rtllib_info_element *info_element,
1698 struct rtllib_network *network,
1699 u8 *addr2)
1700 {
1701 if (IS_DOT11D_ENABLE(ieee)) {
1702 if (info_element->len != 0) {
1703 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1704 network->CountryIeLen = info_element->len;
1705
1706 if (!IS_COUNTRY_IE_VALID(ieee)) {
1707 if (rtllib_act_scanning(ieee, false) && ieee->FirstIe_InScan)
1708 printk(KERN_INFO "Received beacon ContryIE, SSID: <%s>\n", network->ssid);
1709 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1710 }
1711 }
1712
1713 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1714 UPDATE_CIE_WATCHDOG(ieee);
1715 }
1716
1717 }
1718
1719 int rtllib_parse_info_param(struct rtllib_device *ieee,
1720 struct rtllib_info_element *info_element,
1721 u16 length,
1722 struct rtllib_network *network,
1723 struct rtllib_rx_stats *stats)
1724 {
1725 u8 i;
1726 short offset;
1727 u16 tmp_htcap_len = 0;
1728 u16 tmp_htinfo_len = 0;
1729 u16 ht_realtek_agg_len = 0;
1730 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1731 char rates_str[64];
1732 char *p;
1733
1734 while (length >= sizeof(*info_element)) {
1735 if (sizeof(*info_element) + info_element->len > length) {
1736 RTLLIB_DEBUG_MGMT("Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
1737 info_element->len +
1738 sizeof(*info_element),
1739 length, info_element->id);
1740 /* We stop processing but don't return an error here
1741 * because some misbehaviour APs break this rule. ie.
1742 * Orinoco AP1000. */
1743 break;
1744 }
1745
1746 switch (info_element->id) {
1747 case MFIE_TYPE_SSID:
1748 if (rtllib_is_empty_essid(info_element->data,
1749 info_element->len)) {
1750 network->flags |= NETWORK_EMPTY_ESSID;
1751 break;
1752 }
1753
1754 network->ssid_len = min(info_element->len,
1755 (u8) IW_ESSID_MAX_SIZE);
1756 memcpy(network->ssid, info_element->data, network->ssid_len);
1757 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1758 memset(network->ssid + network->ssid_len, 0,
1759 IW_ESSID_MAX_SIZE - network->ssid_len);
1760
1761 RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1762 network->ssid, network->ssid_len);
1763 break;
1764
1765 case MFIE_TYPE_RATES:
1766 p = rates_str;
1767 network->rates_len = min(info_element->len,
1768 MAX_RATES_LENGTH);
1769 for (i = 0; i < network->rates_len; i++) {
1770 network->rates[i] = info_element->data[i];
1771 p += snprintf(p, sizeof(rates_str) -
1772 (p - rates_str), "%02X ",
1773 network->rates[i]);
1774 if (rtllib_is_ofdm_rate
1775 (info_element->data[i])) {
1776 network->flags |= NETWORK_HAS_OFDM;
1777 if (info_element->data[i] &
1778 RTLLIB_BASIC_RATE_MASK)
1779 network->flags &=
1780 ~NETWORK_HAS_CCK;
1781 }
1782
1783 if (rtllib_is_cck_rate
1784 (info_element->data[i])) {
1785 network->flags |= NETWORK_HAS_CCK;
1786 }
1787 }
1788
1789 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1790 rates_str, network->rates_len);
1791 break;
1792
1793 case MFIE_TYPE_RATES_EX:
1794 p = rates_str;
1795 network->rates_ex_len = min(info_element->len,
1796 MAX_RATES_EX_LENGTH);
1797 for (i = 0; i < network->rates_ex_len; i++) {
1798 network->rates_ex[i] = info_element->data[i];
1799 p += snprintf(p, sizeof(rates_str) -
1800 (p - rates_str), "%02X ",
1801 network->rates_ex[i]);
1802 if (rtllib_is_ofdm_rate
1803 (info_element->data[i])) {
1804 network->flags |= NETWORK_HAS_OFDM;
1805 if (info_element->data[i] &
1806 RTLLIB_BASIC_RATE_MASK)
1807 network->flags &=
1808 ~NETWORK_HAS_CCK;
1809 }
1810 }
1811
1812 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1813 rates_str, network->rates_ex_len);
1814 break;
1815
1816 case MFIE_TYPE_DS_SET:
1817 RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1818 info_element->data[0]);
1819 network->channel = info_element->data[0];
1820 break;
1821
1822 case MFIE_TYPE_FH_SET:
1823 RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1824 break;
1825
1826 case MFIE_TYPE_CF_SET:
1827 RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1828 break;
1829
1830 case MFIE_TYPE_TIM:
1831 if (info_element->len < 4)
1832 break;
1833
1834 network->tim.tim_count = info_element->data[0];
1835 network->tim.tim_period = info_element->data[1];
1836
1837 network->dtim_period = info_element->data[1];
1838 if (ieee->state != RTLLIB_LINKED)
1839 break;
1840 network->last_dtim_sta_time = jiffies;
1841
1842 network->dtim_data = RTLLIB_DTIM_VALID;
1843
1844
1845 if (info_element->data[2] & 1)
1846 network->dtim_data |= RTLLIB_DTIM_MBCAST;
1847
1848 offset = (info_element->data[2] >> 1)*2;
1849
1850
1851 if (ieee->assoc_id < 8*offset ||
1852 ieee->assoc_id > 8*(offset + info_element->len - 3))
1853 break;
1854
1855 offset = (ieee->assoc_id / 8) - offset;
1856 if (info_element->data[3 + offset] &
1857 (1 << (ieee->assoc_id % 8)))
1858 network->dtim_data |= RTLLIB_DTIM_UCAST;
1859
1860 network->listen_interval = network->dtim_period;
1861 break;
1862
1863 case MFIE_TYPE_ERP:
1864 network->erp_value = info_element->data[0];
1865 network->flags |= NETWORK_HAS_ERP_VALUE;
1866 RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1867 network->erp_value);
1868 break;
1869 case MFIE_TYPE_IBSS_SET:
1870 network->atim_window = info_element->data[0];
1871 RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1872 network->atim_window);
1873 break;
1874
1875 case MFIE_TYPE_CHALLENGE:
1876 RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1877 break;
1878
1879 case MFIE_TYPE_GENERIC:
1880 RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1881 info_element->len);
1882 if (!rtllib_parse_qos_info_param_IE(info_element,
1883 network))
1884 break;
1885 if (info_element->len >= 4 &&
1886 info_element->data[0] == 0x00 &&
1887 info_element->data[1] == 0x50 &&
1888 info_element->data[2] == 0xf2 &&
1889 info_element->data[3] == 0x01) {
1890 network->wpa_ie_len = min(info_element->len + 2,
1891 MAX_WPA_IE_LEN);
1892 memcpy(network->wpa_ie, info_element,
1893 network->wpa_ie_len);
1894 break;
1895 }
1896 if (info_element->len == 7 &&
1897 info_element->data[0] == 0x00 &&
1898 info_element->data[1] == 0xe0 &&
1899 info_element->data[2] == 0x4c &&
1900 info_element->data[3] == 0x01 &&
1901 info_element->data[4] == 0x02)
1902 network->Turbo_Enable = 1;
1903
1904 if (tmp_htcap_len == 0) {
1905 if (info_element->len >= 4 &&
1906 info_element->data[0] == 0x00 &&
1907 info_element->data[1] == 0x90 &&
1908 info_element->data[2] == 0x4c &&
1909 info_element->data[3] == 0x033) {
1910
1911 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1912 if (tmp_htcap_len != 0) {
1913 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1914 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
1915 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1916 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1917 }
1918 }
1919 if (tmp_htcap_len != 0) {
1920 network->bssht.bdSupportHT = true;
1921 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1922 } else {
1923 network->bssht.bdSupportHT = false;
1924 network->bssht.bdHT1R = false;
1925 }
1926 }
1927
1928
1929 if (tmp_htinfo_len == 0) {
1930 if (info_element->len >= 4 &&
1931 info_element->data[0] == 0x00 &&
1932 info_element->data[1] == 0x90 &&
1933 info_element->data[2] == 0x4c &&
1934 info_element->data[3] == 0x034) {
1935 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1936 if (tmp_htinfo_len != 0) {
1937 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1938 if (tmp_htinfo_len) {
1939 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ?
1940 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1941 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1942 }
1943
1944 }
1945
1946 }
1947 }
1948
1949 if (ieee->aggregation) {
1950 if (network->bssht.bdSupportHT) {
1951 if (info_element->len >= 4 &&
1952 info_element->data[0] == 0x00 &&
1953 info_element->data[1] == 0xe0 &&
1954 info_element->data[2] == 0x4c &&
1955 info_element->data[3] == 0x02) {
1956 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
1957 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1958 }
1959 if (ht_realtek_agg_len >= 5) {
1960 network->realtek_cap_exit = true;
1961 network->bssht.bdRT2RTAggregation = true;
1962
1963 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1964 network->bssht.bdRT2RTLongSlotTime = true;
1965
1966 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1967 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1968 }
1969 }
1970 if (ht_realtek_agg_len >= 5) {
1971 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1972 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1973 }
1974 }
1975
1976 if ((info_element->len >= 3 &&
1977 info_element->data[0] == 0x00 &&
1978 info_element->data[1] == 0x05 &&
1979 info_element->data[2] == 0xb5) ||
1980 (info_element->len >= 3 &&
1981 info_element->data[0] == 0x00 &&
1982 info_element->data[1] == 0x0a &&
1983 info_element->data[2] == 0xf7) ||
1984 (info_element->len >= 3 &&
1985 info_element->data[0] == 0x00 &&
1986 info_element->data[1] == 0x10 &&
1987 info_element->data[2] == 0x18)) {
1988 network->broadcom_cap_exist = true;
1989 }
1990 if (info_element->len >= 3 &&
1991 info_element->data[0] == 0x00 &&
1992 info_element->data[1] == 0x0c &&
1993 info_element->data[2] == 0x43)
1994 network->ralink_cap_exist = true;
1995 if ((info_element->len >= 3 &&
1996 info_element->data[0] == 0x00 &&
1997 info_element->data[1] == 0x03 &&
1998 info_element->data[2] == 0x7f) ||
1999 (info_element->len >= 3 &&
2000 info_element->data[0] == 0x00 &&
2001 info_element->data[1] == 0x13 &&
2002 info_element->data[2] == 0x74))
2003 network->atheros_cap_exist = true;
2004
2005 if ((info_element->len >= 3 &&
2006 info_element->data[0] == 0x00 &&
2007 info_element->data[1] == 0x50 &&
2008 info_element->data[2] == 0x43))
2009 network->marvell_cap_exist = true;
2010 if (info_element->len >= 3 &&
2011 info_element->data[0] == 0x00 &&
2012 info_element->data[1] == 0x40 &&
2013 info_element->data[2] == 0x96)
2014 network->cisco_cap_exist = true;
2015
2016
2017 if (info_element->len >= 3 &&
2018 info_element->data[0] == 0x00 &&
2019 info_element->data[1] == 0x0a &&
2020 info_element->data[2] == 0xf5)
2021 network->airgo_cap_exist = true;
2022
2023 if (info_element->len > 4 &&
2024 info_element->data[0] == 0x00 &&
2025 info_element->data[1] == 0x40 &&
2026 info_element->data[2] == 0x96 &&
2027 info_element->data[3] == 0x01) {
2028 if (info_element->len == 6) {
2029 memcpy(network->CcxRmState, &info_element[4], 2);
2030 if (network->CcxRmState[0] != 0)
2031 network->bCcxRmEnable = true;
2032 else
2033 network->bCcxRmEnable = false;
2034 network->MBssidMask = network->CcxRmState[1] & 0x07;
2035 if (network->MBssidMask != 0) {
2036 network->bMBssidValid = true;
2037 network->MBssidMask = 0xff << (network->MBssidMask);
2038 memcpy(network->MBssid, network->bssid, ETH_ALEN);
2039 network->MBssid[5] &= network->MBssidMask;
2040 } else {
2041 network->bMBssidValid = false;
2042 }
2043 } else {
2044 network->bCcxRmEnable = false;
2045 }
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] == 0x03) {
2052 if (info_element->len == 5) {
2053 network->bWithCcxVerNum = true;
2054 network->BssCcxVerNumber = info_element->data[4];
2055 } else {
2056 network->bWithCcxVerNum = false;
2057 network->BssCcxVerNumber = 0;
2058 }
2059 }
2060 if (info_element->len > 4 &&
2061 info_element->data[0] == 0x00 &&
2062 info_element->data[1] == 0x50 &&
2063 info_element->data[2] == 0xf2 &&
2064 info_element->data[3] == 0x04) {
2065 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2066 info_element->len);
2067 network->wzc_ie_len = min(info_element->len+2,
2068 MAX_WZC_IE_LEN);
2069 memcpy(network->wzc_ie, info_element,
2070 network->wzc_ie_len);
2071 }
2072 break;
2073
2074 case MFIE_TYPE_RSN:
2075 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2076 info_element->len);
2077 network->rsn_ie_len = min(info_element->len + 2,
2078 MAX_WPA_IE_LEN);
2079 memcpy(network->rsn_ie, info_element,
2080 network->rsn_ie_len);
2081 break;
2082
2083 case MFIE_TYPE_HT_CAP:
2084 RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2085 info_element->len);
2086 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
2087 if (tmp_htcap_len != 0) {
2088 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2089 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
2090 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
2091 memcpy(network->bssht.bdHTCapBuf,
2092 info_element->data,
2093 network->bssht.bdHTCapLen);
2094
2095 network->bssht.bdSupportHT = true;
2096 network->bssht.bdHT1R = ((((struct ht_capab_ele *)
2097 network->bssht.bdHTCapBuf))->MCS[1]) == 0;
2098
2099 network->bssht.bdBandWidth = (enum ht_channel_width)
2100 (((struct ht_capab_ele *)
2101 (network->bssht.bdHTCapBuf))->ChlWidth);
2102 } else {
2103 network->bssht.bdSupportHT = false;
2104 network->bssht.bdHT1R = false;
2105 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20;
2106 }
2107 break;
2108
2109
2110 case MFIE_TYPE_HT_INFO:
2111 RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2112 info_element->len);
2113 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
2114 if (tmp_htinfo_len) {
2115 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2116 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2117 sizeof(network->bssht.bdHTInfoBuf) ?
2118 sizeof(network->bssht.bdHTInfoBuf) :
2119 tmp_htinfo_len;
2120 memcpy(network->bssht.bdHTInfoBuf,
2121 info_element->data,
2122 network->bssht.bdHTInfoLen);
2123 }
2124 break;
2125
2126 case MFIE_TYPE_AIRONET:
2127 RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2128 info_element->len);
2129 if (info_element->len > IE_CISCO_FLAG_POSITION) {
2130 network->bWithAironetIE = true;
2131
2132 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2133 & SUPPORT_CKIP_MIC) ||
2134 (info_element->data[IE_CISCO_FLAG_POSITION]
2135 & SUPPORT_CKIP_PK))
2136 network->bCkipSupported = true;
2137 else
2138 network->bCkipSupported = false;
2139 } else {
2140 network->bWithAironetIE = false;
2141 network->bCkipSupported = false;
2142 }
2143 break;
2144 case MFIE_TYPE_QOS_PARAMETER:
2145 printk(KERN_ERR
2146 "QoS Error need to parse QOS_PARAMETER IE\n");
2147 break;
2148
2149 case MFIE_TYPE_COUNTRY:
2150 RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2151 info_element->len);
2152 rtllib_extract_country_ie(ieee, info_element, network,
2153 network->bssid);
2154 break;
2155 /* TODO */
2156 default:
2157 RTLLIB_DEBUG_MGMT
2158 ("Unsupported info element: %s (%d)\n",
2159 get_info_element_string(info_element->id),
2160 info_element->id);
2161 break;
2162 }
2163
2164 length -= sizeof(*info_element) + info_element->len;
2165 info_element =
2166 (struct rtllib_info_element *)&info_element->
2167 data[info_element->len];
2168 }
2169
2170 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2171 !network->cisco_cap_exist && !network->ralink_cap_exist &&
2172 !network->bssht.bdRT2RTAggregation)
2173 network->unknown_cap_exist = true;
2174 else
2175 network->unknown_cap_exist = false;
2176 return 0;
2177 }
2178
2179 static long rtllib_translate_todbm(u8 signal_strength_index)
2180 {
2181 long signal_power;
2182
2183 signal_power = (long)((signal_strength_index + 1) >> 1);
2184 signal_power -= 95;
2185
2186 return signal_power;
2187 }
2188
2189 static inline int rtllib_network_init(
2190 struct rtllib_device *ieee,
2191 struct rtllib_probe_response *beacon,
2192 struct rtllib_network *network,
2193 struct rtllib_rx_stats *stats)
2194 {
2195
2196 /*
2197 network->qos_data.active = 0;
2198 network->qos_data.supported = 0;
2199 network->qos_data.param_count = 0;
2200 network->qos_data.old_param_count = 0;
2201 */
2202 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2203
2204 /* Pull out fixed field data */
2205 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2206 network->capability = le16_to_cpu(beacon->capability);
2207 network->last_scanned = jiffies;
2208 network->time_stamp[0] = beacon->time_stamp[0];
2209 network->time_stamp[1] = beacon->time_stamp[1];
2210 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2211 /* Where to pull this? beacon->listen_interval;*/
2212 network->listen_interval = 0x0A;
2213 network->rates_len = network->rates_ex_len = 0;
2214 network->last_associate = 0;
2215 network->ssid_len = 0;
2216 network->hidden_ssid_len = 0;
2217 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2218 network->flags = 0;
2219 network->atim_window = 0;
2220 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2221 0x3 : 0x0;
2222 network->berp_info_valid = false;
2223 network->broadcom_cap_exist = false;
2224 network->ralink_cap_exist = false;
2225 network->atheros_cap_exist = false;
2226 network->cisco_cap_exist = false;
2227 network->unknown_cap_exist = false;
2228 network->realtek_cap_exit = false;
2229 network->marvell_cap_exist = false;
2230 network->airgo_cap_exist = false;
2231 network->Turbo_Enable = 0;
2232 network->SignalStrength = stats->SignalStrength;
2233 network->RSSI = stats->SignalStrength;
2234 network->CountryIeLen = 0;
2235 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2236 HTInitializeBssDesc(&network->bssht);
2237 if (stats->freq == RTLLIB_52GHZ_BAND) {
2238 /* for A band (No DS info) */
2239 network->channel = stats->received_channel;
2240 } else
2241 network->flags |= NETWORK_HAS_CCK;
2242
2243 network->wpa_ie_len = 0;
2244 network->rsn_ie_len = 0;
2245 network->wzc_ie_len = 0;
2246
2247 if (rtllib_parse_info_param(ieee,
2248 beacon->info_element,
2249 (stats->len - sizeof(*beacon)),
2250 network,
2251 stats))
2252 return 1;
2253
2254 network->mode = 0;
2255 if (stats->freq == RTLLIB_52GHZ_BAND)
2256 network->mode = IEEE_A;
2257 else {
2258 if (network->flags & NETWORK_HAS_OFDM)
2259 network->mode |= IEEE_G;
2260 if (network->flags & NETWORK_HAS_CCK)
2261 network->mode |= IEEE_B;
2262 }
2263
2264 if (network->mode == 0) {
2265 RTLLIB_DEBUG_SCAN("Filtered out '%s (%pM)' network.\n",
2266 escape_essid(network->ssid,
2267 network->ssid_len),
2268 network->bssid);
2269 return 1;
2270 }
2271
2272 if (network->bssht.bdSupportHT) {
2273 if (network->mode == IEEE_A)
2274 network->mode = IEEE_N_5G;
2275 else if (network->mode & (IEEE_G | IEEE_B))
2276 network->mode = IEEE_N_24G;
2277 }
2278 if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2279 network->flags |= NETWORK_EMPTY_ESSID;
2280 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2281 stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2282
2283 memcpy(&network->stats, stats, sizeof(network->stats));
2284
2285 return 0;
2286 }
2287
2288 static inline int is_same_network(struct rtllib_network *src,
2289 struct rtllib_network *dst, u8 ssidbroad)
2290 {
2291 /* A network is only a duplicate if the channel, BSSID, ESSID
2292 * and the capability field (in particular IBSS and BSS) all match.
2293 * We treat all <hidden> with the same BSSID and channel
2294 * as one network */
2295 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2296 (src->channel == dst->channel) &&
2297 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2298 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2299 (!ssidbroad)) &&
2300 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2301 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2302 ((src->capability & WLAN_CAPABILITY_ESS) ==
2303 (dst->capability & WLAN_CAPABILITY_ESS)));
2304 }
2305
2306
2307 static inline void update_network(struct rtllib_network *dst,
2308 struct rtllib_network *src)
2309 {
2310 int qos_active;
2311 u8 old_param;
2312
2313 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2314 dst->capability = src->capability;
2315 memcpy(dst->rates, src->rates, src->rates_len);
2316 dst->rates_len = src->rates_len;
2317 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2318 dst->rates_ex_len = src->rates_ex_len;
2319 if (src->ssid_len > 0) {
2320 if (dst->ssid_len == 0) {
2321 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2322 dst->hidden_ssid_len = src->ssid_len;
2323 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2324 } else {
2325 memset(dst->ssid, 0, dst->ssid_len);
2326 dst->ssid_len = src->ssid_len;
2327 memcpy(dst->ssid, src->ssid, src->ssid_len);
2328 }
2329 }
2330 dst->mode = src->mode;
2331 dst->flags = src->flags;
2332 dst->time_stamp[0] = src->time_stamp[0];
2333 dst->time_stamp[1] = src->time_stamp[1];
2334 if (src->flags & NETWORK_HAS_ERP_VALUE) {
2335 dst->erp_value = src->erp_value;
2336 dst->berp_info_valid = src->berp_info_valid = true;
2337 }
2338 dst->beacon_interval = src->beacon_interval;
2339 dst->listen_interval = src->listen_interval;
2340 dst->atim_window = src->atim_window;
2341 dst->dtim_period = src->dtim_period;
2342 dst->dtim_data = src->dtim_data;
2343 dst->last_dtim_sta_time = src->last_dtim_sta_time;
2344 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2345
2346 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2347 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2348 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2349 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2350 src->bssht.bdHTCapLen);
2351 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2352 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2353 src->bssht.bdHTInfoLen);
2354 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2355 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2356 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2357 dst->ralink_cap_exist = src->ralink_cap_exist;
2358 dst->atheros_cap_exist = src->atheros_cap_exist;
2359 dst->realtek_cap_exit = src->realtek_cap_exit;
2360 dst->marvell_cap_exist = src->marvell_cap_exist;
2361 dst->cisco_cap_exist = src->cisco_cap_exist;
2362 dst->airgo_cap_exist = src->airgo_cap_exist;
2363 dst->unknown_cap_exist = src->unknown_cap_exist;
2364 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2365 dst->wpa_ie_len = src->wpa_ie_len;
2366 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2367 dst->rsn_ie_len = src->rsn_ie_len;
2368 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2369 dst->wzc_ie_len = src->wzc_ie_len;
2370
2371 dst->last_scanned = jiffies;
2372 /* qos related parameters */
2373 qos_active = dst->qos_data.active;
2374 old_param = dst->qos_data.param_count;
2375 dst->qos_data.supported = src->qos_data.supported;
2376 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2377 memcpy(&dst->qos_data, &src->qos_data,
2378 sizeof(struct rtllib_qos_data));
2379 if (dst->qos_data.supported == 1) {
2380 if (dst->ssid_len)
2381 RTLLIB_DEBUG_QOS
2382 ("QoS the network %s is QoS supported\n",
2383 dst->ssid);
2384 else
2385 RTLLIB_DEBUG_QOS
2386 ("QoS the network is QoS supported\n");
2387 }
2388 dst->qos_data.active = qos_active;
2389 dst->qos_data.old_param_count = old_param;
2390
2391 /* dst->last_associate is not overwritten */
2392 dst->wmm_info = src->wmm_info;
2393 if (src->wmm_param[0].ac_aci_acm_aifsn ||
2394 src->wmm_param[1].ac_aci_acm_aifsn ||
2395 src->wmm_param[2].ac_aci_acm_aifsn ||
2396 src->wmm_param[3].ac_aci_acm_aifsn)
2397 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2398
2399 dst->SignalStrength = src->SignalStrength;
2400 dst->RSSI = src->RSSI;
2401 dst->Turbo_Enable = src->Turbo_Enable;
2402
2403 dst->CountryIeLen = src->CountryIeLen;
2404 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2405
2406 dst->bWithAironetIE = src->bWithAironetIE;
2407 dst->bCkipSupported = src->bCkipSupported;
2408 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2409 dst->bCcxRmEnable = src->bCcxRmEnable;
2410 dst->MBssidMask = src->MBssidMask;
2411 dst->bMBssidValid = src->bMBssidValid;
2412 memcpy(dst->MBssid, src->MBssid, 6);
2413 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2414 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2415 }
2416
2417 static inline int is_beacon(__le16 fc)
2418 {
2419 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2420 }
2421
2422 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2423 {
2424 if (MAX_CHANNEL_NUMBER < channel) {
2425 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
2426 return 0;
2427 }
2428
2429 if (rtllib->active_channel_map[channel] == 2)
2430 return 1;
2431
2432 return 0;
2433 }
2434
2435 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2436 {
2437 if (MAX_CHANNEL_NUMBER < channel) {
2438 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
2439 return 0;
2440 }
2441 if (rtllib->active_channel_map[channel] > 0)
2442 return 1;
2443
2444 return 0;
2445 }
2446 EXPORT_SYMBOL(rtllib_legal_channel);
2447
2448 static inline void rtllib_process_probe_response(
2449 struct rtllib_device *ieee,
2450 struct rtllib_probe_response *beacon,
2451 struct rtllib_rx_stats *stats)
2452 {
2453 struct rtllib_network *target;
2454 struct rtllib_network *oldest = NULL;
2455 struct rtllib_info_element *info_element = &beacon->info_element[0];
2456 unsigned long flags;
2457 short renew;
2458 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2459 GFP_ATOMIC);
2460
2461 if (!network)
2462 return;
2463
2464 RTLLIB_DEBUG_SCAN(
2465 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2466 escape_essid(info_element->data, info_element->len),
2467 beacon->header.addr3,
2468 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2469 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2470 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2471 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2472 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2473 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2474 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2475 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2476 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2477 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2478 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2479 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2480 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2481 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2482 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2483 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2484
2485 if (rtllib_network_init(ieee, beacon, network, stats)) {
2486 RTLLIB_DEBUG_SCAN("Dropped '%s' ( %pM) via %s.\n",
2487 escape_essid(info_element->data,
2488 info_element->len),
2489 beacon->header.addr3,
2490 WLAN_FC_GET_STYPE(
2491 le16_to_cpu(beacon->header.frame_ctl)) ==
2492 RTLLIB_STYPE_PROBE_RESP ?
2493 "PROBE RESPONSE" : "BEACON");
2494 goto free_network;
2495 }
2496
2497
2498 if (!rtllib_legal_channel(ieee, network->channel))
2499 goto free_network;
2500
2501 if (WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)) ==
2502 RTLLIB_STYPE_PROBE_RESP) {
2503 if (IsPassiveChannel(ieee, network->channel)) {
2504 printk(KERN_INFO "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2505 network->channel);
2506 goto free_network;
2507 }
2508 }
2509
2510 /* The network parsed correctly -- so now we scan our known networks
2511 * to see if we can find it in our list.
2512 *
2513 * NOTE: This search is definitely not optimized. Once its doing
2514 * the "right thing" we'll optimize it for efficiency if
2515 * necessary */
2516
2517 /* Search for this entry in the list and update it if it is
2518 * already there. */
2519
2520 spin_lock_irqsave(&ieee->lock, flags);
2521 if (is_same_network(&ieee->current_network, network,
2522 (network->ssid_len ? 1 : 0))) {
2523 update_network(&ieee->current_network, network);
2524 if ((ieee->current_network.mode == IEEE_N_24G ||
2525 ieee->current_network.mode == IEEE_G)
2526 && ieee->current_network.berp_info_valid) {
2527 if (ieee->current_network.erp_value & ERP_UseProtection)
2528 ieee->current_network.buseprotection = true;
2529 else
2530 ieee->current_network.buseprotection = false;
2531 }
2532 if (is_beacon(beacon->header.frame_ctl)) {
2533 if (ieee->state >= RTLLIB_LINKED)
2534 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2535 }
2536 }
2537 list_for_each_entry(target, &ieee->network_list, list) {
2538 if (is_same_network(target, network,
2539 (target->ssid_len ? 1 : 0)))
2540 break;
2541 if ((oldest == NULL) ||
2542 (target->last_scanned < oldest->last_scanned))
2543 oldest = target;
2544 }
2545
2546 /* If we didn't find a match, then get a new network slot to initialize
2547 * with this beacon's information */
2548 if (&target->list == &ieee->network_list) {
2549 if (list_empty(&ieee->network_free_list)) {
2550 /* If there are no more slots, expire the oldest */
2551 list_del(&oldest->list);
2552 target = oldest;
2553 RTLLIB_DEBUG_SCAN("Expired '%s' ( %pM) from network list.\n",
2554 escape_essid(target->ssid,
2555 target->ssid_len),
2556 target->bssid);
2557 } else {
2558 /* Otherwise just pull from the free list */
2559 target = list_entry(ieee->network_free_list.next,
2560 struct rtllib_network, list);
2561 list_del(ieee->network_free_list.next);
2562 }
2563
2564
2565 RTLLIB_DEBUG_SCAN("Adding '%s' ( %pM) via %s.\n",
2566 escape_essid(network->ssid,
2567 network->ssid_len), network->bssid,
2568 WLAN_FC_GET_STYPE(
2569 le16_to_cpu(beacon->header.frame_ctl)) ==
2570 RTLLIB_STYPE_PROBE_RESP ?
2571 "PROBE RESPONSE" : "BEACON");
2572 memcpy(target, network, sizeof(*target));
2573 list_add_tail(&target->list, &ieee->network_list);
2574 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2575 rtllib_softmac_new_net(ieee, network);
2576 } else {
2577 RTLLIB_DEBUG_SCAN("Updating '%s' ( %pM) via %s.\n",
2578 escape_essid(target->ssid,
2579 target->ssid_len), target->bssid,
2580 WLAN_FC_GET_STYPE(
2581 le16_to_cpu(beacon->header.frame_ctl)) ==
2582 RTLLIB_STYPE_PROBE_RESP ?
2583 "PROBE RESPONSE" : "BEACON");
2584
2585 /* we have an entry and we are going to update it. But this
2586 * entry may be already expired. In this case we do the same
2587 * as we found a new net and call the new_net handler
2588 */
2589 renew = !time_after(target->last_scanned + ieee->scan_age,
2590 jiffies);
2591 if ((!target->ssid_len) &&
2592 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2593 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2594 (strncmp(ieee->current_network.ssid, network->ssid,
2595 network->ssid_len) == 0) &&
2596 (ieee->state == RTLLIB_NOLINK))))
2597 renew = 1;
2598 update_network(target, network);
2599 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2600 rtllib_softmac_new_net(ieee, network);
2601 }
2602
2603 spin_unlock_irqrestore(&ieee->lock, flags);
2604 if (is_beacon(beacon->header.frame_ctl) &&
2605 is_same_network(&ieee->current_network, network,
2606 (network->ssid_len ? 1 : 0)) &&
2607 (ieee->state == RTLLIB_LINKED)) {
2608 if (ieee->handle_beacon != NULL)
2609 ieee->handle_beacon(ieee->dev, beacon,
2610 &ieee->current_network);
2611 }
2612 free_network:
2613 kfree(network);
2614 return;
2615 }
2616
2617 void rtllib_rx_mgt(struct rtllib_device *ieee,
2618 struct sk_buff *skb,
2619 struct rtllib_rx_stats *stats)
2620 {
2621 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
2622
2623 if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2624 RTLLIB_STYPE_PROBE_RESP) &&
2625 (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2626 RTLLIB_STYPE_BEACON))
2627 ieee->last_rx_ps_time = jiffies;
2628
2629 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2630
2631 case RTLLIB_STYPE_BEACON:
2632 RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
2633 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2634 RTLLIB_DEBUG_SCAN("Beacon\n");
2635 rtllib_process_probe_response(
2636 ieee, (struct rtllib_probe_response *)header,
2637 stats);
2638
2639 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2640 ieee->iw_mode == IW_MODE_INFRA &&
2641 ieee->state == RTLLIB_LINKED))
2642 tasklet_schedule(&ieee->ps_task);
2643
2644 break;
2645
2646 case RTLLIB_STYPE_PROBE_RESP:
2647 RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2648 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2649 RTLLIB_DEBUG_SCAN("Probe response\n");
2650 rtllib_process_probe_response(ieee,
2651 (struct rtllib_probe_response *)header, stats);
2652 break;
2653 case RTLLIB_STYPE_PROBE_REQ:
2654 RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
2655 WLAN_FC_GET_STYPE(
2656 le16_to_cpu(header->frame_ctl)));
2657 RTLLIB_DEBUG_SCAN("Probe request\n");
2658 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2659 ((ieee->iw_mode == IW_MODE_ADHOC ||
2660 ieee->iw_mode == IW_MODE_MASTER) &&
2661 ieee->state == RTLLIB_LINKED))
2662 rtllib_rx_probe_rq(ieee, skb);
2663 break;
2664 }
2665 }
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