1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Original code based Host AP (software wireless LAN access point) driver
4 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
5 *
6 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
7 * <jkmaline@cc.hut.fi>
8 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
9 * Copyright (c) 2004, Intel Corporation
10 *
11 * Few modifications for Realtek's Wi-Fi drivers by
12 * Andrea Merello <andrea.merello@gmail.com>
13 *
14 * A special thanks goes to Realtek for their support !
15 */
16 #include <linux/compiler.h>
17 #include <linux/errno.h>
18 #include <linux/if_arp.h>
19 #include <linux/in6.h>
20 #include <linux/in.h>
21 #include <linux/ip.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/netdevice.h>
25 #include <linux/pci.h>
26 #include <linux/proc_fs.h>
27 #include <linux/skbuff.h>
28 #include <linux/slab.h>
29 #include <linux/tcp.h>
30 #include <linux/types.h>
31 #include <linux/wireless.h>
32 #include <linux/etherdevice.h>
33 #include <linux/uaccess.h>
34 #include <linux/ctype.h>
35
36 #include "rtllib.h"
37
38 static void rtllib_rx_mgt(struct rtllib_device *ieee, struct sk_buff *skb,
39 struct rtllib_rx_stats *stats);
40
rtllib_monitor_rx(struct rtllib_device * ieee,struct sk_buff * skb,struct rtllib_rx_stats * rx_status,size_t hdr_length)41 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
42 struct sk_buff *skb,
43 struct rtllib_rx_stats *rx_status,
44 size_t hdr_length)
45 {
46 skb->dev = ieee->dev;
47 skb_reset_mac_header(skb);
48 skb_pull(skb, hdr_length);
49 skb->pkt_type = PACKET_OTHERHOST;
50 skb->protocol = htons(ETH_P_80211_RAW);
51 memset(skb->cb, 0, sizeof(skb->cb));
52 netif_rx(skb);
53 }
54
55 /* Called only as a tasklet (software IRQ) */
56 static struct rtllib_frag_entry *
rtllib_frag_cache_find(struct rtllib_device * ieee,unsigned int seq,unsigned int frag,u8 tid,u8 * src,u8 * dst)57 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
58 unsigned int frag, u8 tid, u8 *src, u8 *dst)
59 {
60 struct rtllib_frag_entry *entry;
61 int i;
62
63 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
64 entry = &ieee->frag_cache[tid][i];
65 if (entry->skb &&
66 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
67 netdev_dbg(ieee->dev,
68 "expiring fragment cache entry seq=%u last_frag=%u\n",
69 entry->seq, entry->last_frag);
70 dev_kfree_skb_any(entry->skb);
71 entry->skb = NULL;
72 }
73
74 if (entry->skb && entry->seq == seq &&
75 (entry->last_frag + 1 == frag || frag == -1) &&
76 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
77 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
78 return entry;
79 }
80
81 return NULL;
82 }
83
84 /* Called only as a tasklet (software IRQ) */
85 static struct sk_buff *
rtllib_frag_cache_get(struct rtllib_device * ieee,struct ieee80211_hdr * hdr)86 rtllib_frag_cache_get(struct rtllib_device *ieee,
87 struct ieee80211_hdr *hdr)
88 {
89 struct sk_buff *skb = NULL;
90 u16 fc = le16_to_cpu(hdr->frame_control);
91 u16 sc = le16_to_cpu(hdr->seq_ctrl);
92 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
93 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
94 struct rtllib_frag_entry *entry;
95 struct ieee80211_qos_hdr *hdr_3addrqos;
96 struct ieee80211_qos_hdr_4addr *hdr_4addrqos;
97 u8 tid;
98
99 if (ieee80211_has_a4(hdr->frame_control) &&
100 RTLLIB_QOS_HAS_SEQ(fc)) {
101 hdr_4addrqos = (struct ieee80211_qos_hdr_4addr *)hdr;
102 tid = le16_to_cpu(hdr_4addrqos->qos_ctrl) & RTLLIB_QCTL_TID;
103 tid = UP2AC(tid);
104 tid++;
105 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
106 hdr_3addrqos = (struct ieee80211_qos_hdr *)hdr;
107 tid = le16_to_cpu(hdr_3addrqos->qos_ctrl) & RTLLIB_QCTL_TID;
108 tid = UP2AC(tid);
109 tid++;
110 } else {
111 tid = 0;
112 }
113
114 if (frag == 0) {
115 /* Reserve enough space to fit maximum frame length */
116 skb = dev_alloc_skb(ieee->dev->mtu +
117 sizeof(struct ieee80211_hdr) +
118 8 /* LLC */ +
119 2 /* alignment */ +
120 8 /* WEP */ +
121 ETH_ALEN /* WDS */ +
122 /* QOS Control */
123 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0));
124 if (!skb)
125 return NULL;
126
127 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
128 ieee->frag_next_idx[tid]++;
129 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
130 ieee->frag_next_idx[tid] = 0;
131
132 if (entry->skb)
133 dev_kfree_skb_any(entry->skb);
134
135 entry->first_frag_time = jiffies;
136 entry->seq = seq;
137 entry->last_frag = frag;
138 entry->skb = skb;
139 ether_addr_copy(entry->src_addr, hdr->addr2);
140 ether_addr_copy(entry->dst_addr, hdr->addr1);
141 } else {
142 /* received a fragment of a frame for which the head fragment
143 * should have already been received
144 */
145 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
146 hdr->addr1);
147 if (entry) {
148 entry->last_frag = frag;
149 skb = entry->skb;
150 }
151 }
152
153 return skb;
154 }
155
156 /* Called only as a tasklet (software IRQ) */
rtllib_frag_cache_invalidate(struct rtllib_device * ieee,struct ieee80211_hdr * hdr)157 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
158 struct ieee80211_hdr *hdr)
159 {
160 u16 fc = le16_to_cpu(hdr->frame_control);
161 u16 sc = le16_to_cpu(hdr->seq_ctrl);
162 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
163 struct rtllib_frag_entry *entry;
164 struct ieee80211_qos_hdr *hdr_3addrqos;
165 struct ieee80211_qos_hdr_4addr *hdr_4addrqos;
166 u8 tid;
167
168 if (ieee80211_has_a4(hdr->frame_control) &&
169 RTLLIB_QOS_HAS_SEQ(fc)) {
170 hdr_4addrqos = (struct ieee80211_qos_hdr_4addr *)hdr;
171 tid = le16_to_cpu(hdr_4addrqos->qos_ctrl) & RTLLIB_QCTL_TID;
172 tid = UP2AC(tid);
173 tid++;
174 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
175 hdr_3addrqos = (struct ieee80211_qos_hdr *)hdr;
176 tid = le16_to_cpu(hdr_3addrqos->qos_ctrl) & RTLLIB_QCTL_TID;
177 tid = UP2AC(tid);
178 tid++;
179 } else {
180 tid = 0;
181 }
182
183 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
184 hdr->addr1);
185
186 if (!entry) {
187 netdev_dbg(ieee->dev,
188 "Couldn't invalidate fragment cache entry (seq=%u)\n",
189 seq);
190 return -1;
191 }
192
193 entry->skb = NULL;
194 return 0;
195 }
196
197 /* rtllib_rx_frame_mgtmt
198 *
199 * Responsible for handling management control frames
200 *
201 * Called by rtllib_rx
202 */
203 static inline int
rtllib_rx_frame_mgmt(struct rtllib_device * ieee,struct sk_buff * skb,struct rtllib_rx_stats * rx_stats,u16 type,u16 stype)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 ieee80211_hdr_3addr *hdr = (struct ieee80211_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 /* No encapsulation header if EtherType < 0x600 (=length) */
228
229 /* Called by rtllib_rx_frame_decrypt */
rtllib_is_eapol_frame(struct rtllib_device * ieee,struct sk_buff * skb,size_t hdrlen)230 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
231 struct sk_buff *skb, size_t hdrlen)
232 {
233 struct net_device *dev = ieee->dev;
234 u16 fc, ethertype;
235 struct ieee80211_hdr *hdr;
236 u8 *pos;
237
238 if (skb->len < 24)
239 return 0;
240
241 hdr = (struct ieee80211_hdr *)skb->data;
242 fc = le16_to_cpu(hdr->frame_control);
243
244 /* check that the frame is unicast frame to us */
245 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
246 IEEE80211_FCTL_TODS &&
247 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
248 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
249 /* ToDS frame with own addr BSSID and DA */
250 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
251 IEEE80211_FCTL_FROMDS &&
252 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
253 /* FromDS frame with own addr as DA */
254 } else {
255 return 0;
256 }
257
258 if (skb->len < 24 + 8)
259 return 0;
260
261 /* check for port access entity Ethernet type */
262 pos = skb->data + hdrlen;
263 ethertype = (pos[6] << 8) | pos[7];
264 if (ethertype == ETH_P_PAE)
265 return 1;
266
267 return 0;
268 }
269
270 /* Called only as a tasklet (software IRQ), by rtllib_rx */
271 static inline int
rtllib_rx_frame_decrypt(struct rtllib_device * ieee,struct sk_buff * skb,struct lib80211_crypt_data * crypt)272 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
273 struct lib80211_crypt_data *crypt)
274 {
275 struct ieee80211_hdr *hdr;
276 int res, hdrlen;
277
278 if (!crypt || !crypt->ops->decrypt_mpdu)
279 return 0;
280
281 if (ieee->hwsec_active) {
282 struct cb_desc *tcb_desc = (struct cb_desc *)
283 (skb->cb + MAX_DEV_ADDR_SIZE);
284
285 tcb_desc->bHwSec = 1;
286
287 if (ieee->need_sw_enc)
288 tcb_desc->bHwSec = 0;
289 }
290
291 hdr = (struct ieee80211_hdr *)skb->data;
292 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_control));
293
294 atomic_inc(&crypt->refcnt);
295 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
296 atomic_dec(&crypt->refcnt);
297 if (res < 0) {
298 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n",
299 hdr->addr2, res);
300 if (res == -2)
301 netdev_dbg(ieee->dev,
302 "Decryption failed ICV mismatch (key %d)\n",
303 skb->data[hdrlen + 3] >> 6);
304 return -1;
305 }
306
307 return res;
308 }
309
310 /* Called only as a tasklet (software IRQ), by rtllib_rx */
311 static inline int
rtllib_rx_frame_decrypt_msdu(struct rtllib_device * ieee,struct sk_buff * skb,int keyidx,struct lib80211_crypt_data * crypt)312 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
313 int keyidx, struct lib80211_crypt_data *crypt)
314 {
315 struct ieee80211_hdr *hdr;
316 int res, hdrlen;
317
318 if (!crypt || !crypt->ops->decrypt_msdu)
319 return 0;
320 if (ieee->hwsec_active) {
321 struct cb_desc *tcb_desc = (struct cb_desc *)
322 (skb->cb + MAX_DEV_ADDR_SIZE);
323
324 tcb_desc->bHwSec = 1;
325
326 if (ieee->need_sw_enc)
327 tcb_desc->bHwSec = 0;
328 }
329
330 hdr = (struct ieee80211_hdr *)skb->data;
331 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_control));
332
333 atomic_inc(&crypt->refcnt);
334 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
335 atomic_dec(&crypt->refcnt);
336 if (res < 0) {
337 netdev_dbg(ieee->dev,
338 "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
339 hdr->addr2, keyidx);
340 return -1;
341 }
342
343 return 0;
344 }
345
346 /* this function is stolen from ipw2200 driver*/
347 #define IEEE_PACKET_RETRY_TIME (5 * HZ)
is_duplicate_packet(struct rtllib_device * ieee,struct ieee80211_hdr * header)348 static int is_duplicate_packet(struct rtllib_device *ieee,
349 struct ieee80211_hdr *header)
350 {
351 u16 fc = le16_to_cpu(header->frame_control);
352 u16 sc = le16_to_cpu(header->seq_ctrl);
353 u16 seq = WLAN_GET_SEQ_SEQ(sc);
354 u16 frag = WLAN_GET_SEQ_FRAG(sc);
355 u16 *last_seq, *last_frag;
356 unsigned long *last_time;
357 struct ieee80211_qos_hdr *hdr_3addrqos;
358 struct ieee80211_qos_hdr_4addr *hdr_4addrqos;
359 u8 tid;
360
361 if (ieee80211_has_a4(header->frame_control) &&
362 RTLLIB_QOS_HAS_SEQ(fc)) {
363 hdr_4addrqos = (struct ieee80211_qos_hdr_4addr *)header;
364 tid = le16_to_cpu(hdr_4addrqos->qos_ctrl) & RTLLIB_QCTL_TID;
365 tid = UP2AC(tid);
366 tid++;
367 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
368 hdr_3addrqos = (struct ieee80211_qos_hdr *)header;
369 tid = le16_to_cpu(hdr_3addrqos->qos_ctrl) & RTLLIB_QCTL_TID;
370 tid = UP2AC(tid);
371 tid++;
372 } else {
373 tid = 0;
374 }
375
376 switch (ieee->iw_mode) {
377 case IW_MODE_INFRA:
378 last_seq = &ieee->last_rxseq_num[tid];
379 last_frag = &ieee->last_rxfrag_num[tid];
380 last_time = &ieee->last_packet_time[tid];
381 break;
382 default:
383 return 0;
384 }
385
386 if ((*last_seq == seq) &&
387 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
388 if (*last_frag == frag)
389 goto drop;
390 if (*last_frag + 1 != frag)
391 /* out-of-order fragment */
392 goto drop;
393 } else {
394 *last_seq = seq;
395 }
396
397 *last_frag = frag;
398 *last_time = jiffies;
399 return 0;
400
401 drop:
402
403 return 1;
404 }
405
AddReorderEntry(struct rx_ts_record * ts,struct rx_reorder_entry * pReorderEntry)406 static bool AddReorderEntry(struct rx_ts_record *ts,
407 struct rx_reorder_entry *pReorderEntry)
408 {
409 struct list_head *pList = &ts->rx_pending_pkt_list;
410
411 while (pList->next != &ts->rx_pending_pkt_list) {
412 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
413 list_entry(pList->next, struct rx_reorder_entry,
414 list))->SeqNum))
415 pList = pList->next;
416 else if (SN_EQUAL(pReorderEntry->SeqNum,
417 ((struct rx_reorder_entry *)list_entry(pList->next,
418 struct rx_reorder_entry, list))->SeqNum))
419 return false;
420 else
421 break;
422 }
423 pReorderEntry->list.next = pList->next;
424 pReorderEntry->list.next->prev = &pReorderEntry->list;
425 pReorderEntry->list.prev = pList;
426 pList->next = &pReorderEntry->list;
427
428 return true;
429 }
430
rtllib_indicate_packets(struct rtllib_device * ieee,struct rtllib_rxb ** prxbIndicateArray,u8 index)431 void rtllib_indicate_packets(struct rtllib_device *ieee,
432 struct rtllib_rxb **prxbIndicateArray, u8 index)
433 {
434 struct net_device_stats *stats = &ieee->stats;
435 u8 i = 0, j = 0;
436 u16 ethertype;
437
438 for (j = 0; j < index; j++) {
439 struct rtllib_rxb *prxb = prxbIndicateArray[j];
440
441 for (i = 0; i < prxb->nr_subframes; i++) {
442 struct sk_buff *sub_skb = prxb->subframes[i];
443
444 /* convert hdr + possible LLC headers into Ethernet header */
445 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
446 if (sub_skb->len >= 8 &&
447 ((memcmp(sub_skb->data, rfc1042_header,
448 SNAP_SIZE) == 0 &&
449 ethertype != ETH_P_AARP &&
450 ethertype != ETH_P_IPX) ||
451 memcmp(sub_skb->data, bridge_tunnel_header,
452 SNAP_SIZE) == 0)) {
453 /* remove RFC1042 or Bridge-Tunnel encapsulation
454 * and replace EtherType
455 */
456 skb_pull(sub_skb, SNAP_SIZE);
457 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
458 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
459 } else {
460 u16 len;
461 /* Leave Ethernet header part of hdr and full payload */
462 len = sub_skb->len;
463 memcpy(skb_push(sub_skb, 2), &len, 2);
464 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
465 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
466 }
467
468 /* Indicate the packets to upper layer */
469 if (sub_skb) {
470 stats->rx_packets++;
471 stats->rx_bytes += sub_skb->len;
472
473 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
474 sub_skb->protocol = eth_type_trans(sub_skb,
475 ieee->dev);
476 sub_skb->dev = ieee->dev;
477 sub_skb->dev->stats.rx_packets++;
478 sub_skb->dev->stats.rx_bytes += sub_skb->len;
479 /* 802.11 crc not sufficient */
480 sub_skb->ip_summed = CHECKSUM_NONE;
481 ieee->last_rx_ps_time = jiffies;
482 netif_rx(sub_skb);
483 }
484 }
485 kfree(prxb);
486 prxb = NULL;
487 }
488 }
489
rtllib_FlushRxTsPendingPkts(struct rtllib_device * ieee,struct rx_ts_record * ts)490 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,
491 struct rx_ts_record *ts)
492 {
493 struct rx_reorder_entry *pRxReorderEntry;
494 u8 RfdCnt = 0;
495
496 del_timer_sync(&ts->rx_pkt_pending_timer);
497 while (!list_empty(&ts->rx_pending_pkt_list)) {
498 if (RfdCnt >= REORDER_WIN_SIZE) {
499 netdev_info(ieee->dev,
500 "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n",
501 __func__);
502 break;
503 }
504
505 pRxReorderEntry = (struct rx_reorder_entry *)
506 list_entry(ts->rx_pending_pkt_list.prev,
507 struct rx_reorder_entry, list);
508 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__,
509 pRxReorderEntry->SeqNum);
510 list_del_init(&pRxReorderEntry->list);
511
512 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
513
514 RfdCnt = RfdCnt + 1;
515 list_add_tail(&pRxReorderEntry->list,
516 &ieee->RxReorder_Unused_List);
517 }
518 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
519
520 ts->rx_indicate_seq = 0xffff;
521 }
522
RxReorderIndicatePacket(struct rtllib_device * ieee,struct rtllib_rxb * prxb,struct rx_ts_record * ts,u16 SeqNum)523 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
524 struct rtllib_rxb *prxb,
525 struct rx_ts_record *ts, u16 SeqNum)
526 {
527 struct rt_hi_throughput *ht_info = ieee->ht_info;
528 struct rx_reorder_entry *pReorderEntry = NULL;
529 u8 WinSize = ht_info->rx_reorder_win_size;
530 u16 WinEnd = 0;
531 u8 index = 0;
532 bool bMatchWinStart = false, bPktInBuf = false;
533 unsigned long flags;
534
535 netdev_dbg(ieee->dev,
536 "%s(): Seq is %d, ts->rx_indicate_seq is %d, WinSize is %d\n",
537 __func__, SeqNum, ts->rx_indicate_seq, WinSize);
538
539 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
540
541 WinEnd = (ts->rx_indicate_seq + WinSize - 1) % 4096;
542 /* Rx Reorder initialize condition.*/
543 if (ts->rx_indicate_seq == 0xffff)
544 ts->rx_indicate_seq = SeqNum;
545
546 /* Drop out the packet which SeqNum is smaller than WinStart */
547 if (SN_LESS(SeqNum, ts->rx_indicate_seq)) {
548 netdev_dbg(ieee->dev,
549 "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
550 ts->rx_indicate_seq, SeqNum);
551 ht_info->rx_reorder_drop_counter++;
552 {
553 int i;
554
555 for (i = 0; i < prxb->nr_subframes; i++)
556 dev_kfree_skb(prxb->subframes[i]);
557 kfree(prxb);
558 prxb = NULL;
559 }
560 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
561 return;
562 }
563
564 /* Sliding window manipulation. Conditions includes:
565 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
566 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
567 */
568 if (SN_EQUAL(SeqNum, ts->rx_indicate_seq)) {
569 ts->rx_indicate_seq = (ts->rx_indicate_seq + 1) % 4096;
570 bMatchWinStart = true;
571 } else if (SN_LESS(WinEnd, SeqNum)) {
572 if (SeqNum >= (WinSize - 1))
573 ts->rx_indicate_seq = SeqNum + 1 - WinSize;
574 else
575 ts->rx_indicate_seq = 4095 -
576 (WinSize - (SeqNum + 1)) + 1;
577 netdev_dbg(ieee->dev,
578 "Window Shift! IndicateSeq: %d, NewSeq: %d\n",
579 ts->rx_indicate_seq, SeqNum);
580 }
581
582 /* Indication process.
583 * After Packet dropping and Sliding Window shifting as above, we can
584 * now just indicate the packets with the SeqNum smaller than latest
585 * WinStart and struct buffer other packets.
586 *
587 * For Rx Reorder condition:
588 * 1. All packets with SeqNum smaller than WinStart => Indicate
589 * 2. All packets with SeqNum larger than or equal to
590 * WinStart => Buffer it.
591 */
592 if (bMatchWinStart) {
593 /* Current packet is going to be indicated.*/
594 netdev_dbg(ieee->dev,
595 "Packets indication! IndicateSeq: %d, NewSeq: %d\n",
596 ts->rx_indicate_seq, SeqNum);
597 ieee->prxbIndicateArray[0] = prxb;
598 index = 1;
599 } else {
600 /* Current packet is going to be inserted into pending list.*/
601 if (!list_empty(&ieee->RxReorder_Unused_List)) {
602 pReorderEntry = (struct rx_reorder_entry *)
603 list_entry(ieee->RxReorder_Unused_List.next,
604 struct rx_reorder_entry, list);
605 list_del_init(&pReorderEntry->list);
606
607 /* Make a reorder entry and insert
608 * into a the packet list.
609 */
610 pReorderEntry->SeqNum = SeqNum;
611 pReorderEntry->prxb = prxb;
612
613 if (!AddReorderEntry(ts, pReorderEntry)) {
614 int i;
615
616 netdev_dbg(ieee->dev,
617 "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n",
618 __func__, ts->rx_indicate_seq,
619 SeqNum);
620 list_add_tail(&pReorderEntry->list,
621 &ieee->RxReorder_Unused_List);
622
623 for (i = 0; i < prxb->nr_subframes; i++)
624 dev_kfree_skb(prxb->subframes[i]);
625 kfree(prxb);
626 prxb = NULL;
627 } else {
628 netdev_dbg(ieee->dev,
629 "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n",
630 ts->rx_indicate_seq, SeqNum);
631 }
632 } else {
633 /* Packets are dropped if there are not enough reorder
634 * entries. This part should be modified!! We can just
635 * indicate all the packets in struct buffer and get
636 * reorder entries.
637 */
638 netdev_err(ieee->dev,
639 "%s(): There is no reorder entry! Packet is dropped!\n",
640 __func__);
641 {
642 int i;
643
644 for (i = 0; i < prxb->nr_subframes; i++)
645 dev_kfree_skb(prxb->subframes[i]);
646 kfree(prxb);
647 prxb = NULL;
648 }
649 }
650 }
651
652 /* Check if there is any packet need indicate.*/
653 while (!list_empty(&ts->rx_pending_pkt_list)) {
654 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n",
655 __func__);
656
657 pReorderEntry = (struct rx_reorder_entry *)
658 list_entry(ts->rx_pending_pkt_list.prev,
659 struct rx_reorder_entry,
660 list);
661 if (SN_LESS(pReorderEntry->SeqNum, ts->rx_indicate_seq) ||
662 SN_EQUAL(pReorderEntry->SeqNum, ts->rx_indicate_seq)) {
663 /* This protect struct buffer from overflow. */
664 if (index >= REORDER_WIN_SIZE) {
665 netdev_err(ieee->dev,
666 "%s(): Buffer overflow!\n",
667 __func__);
668 bPktInBuf = true;
669 break;
670 }
671
672 list_del_init(&pReorderEntry->list);
673
674 if (SN_EQUAL(pReorderEntry->SeqNum, ts->rx_indicate_seq))
675 ts->rx_indicate_seq = (ts->rx_indicate_seq + 1) %
676 4096;
677
678 ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
679 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n",
680 __func__, pReorderEntry->SeqNum);
681 index++;
682
683 list_add_tail(&pReorderEntry->list,
684 &ieee->RxReorder_Unused_List);
685 } else {
686 bPktInBuf = true;
687 break;
688 }
689 }
690
691 /* Handling pending timer. Set this timer to prevent from long time
692 * Rx buffering.
693 */
694 if (index > 0) {
695 spin_unlock_irqrestore(&ieee->reorder_spinlock, flags);
696 if (timer_pending(&ts->rx_pkt_pending_timer))
697 del_timer_sync(&ts->rx_pkt_pending_timer);
698 spin_lock_irqsave(&ieee->reorder_spinlock, flags);
699 ts->rx_timeout_indicate_seq = 0xffff;
700
701 if (index > REORDER_WIN_SIZE) {
702 netdev_err(ieee->dev,
703 "%s(): Rx Reorder struct buffer full!\n",
704 __func__);
705 spin_unlock_irqrestore(&(ieee->reorder_spinlock),
706 flags);
707 return;
708 }
709 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
710 bPktInBuf = false;
711 }
712
713 if (bPktInBuf && ts->rx_timeout_indicate_seq == 0xffff) {
714 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__);
715 ts->rx_timeout_indicate_seq = ts->rx_indicate_seq;
716 spin_unlock_irqrestore(&ieee->reorder_spinlock, flags);
717 mod_timer(&ts->rx_pkt_pending_timer, jiffies +
718 msecs_to_jiffies(ht_info->rx_reorder_pending_time));
719 spin_lock_irqsave(&ieee->reorder_spinlock, flags);
720 }
721 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
722 }
723
parse_subframe(struct rtllib_device * ieee,struct sk_buff * skb,struct rtllib_rx_stats * rx_stats,struct rtllib_rxb * rxb,u8 * src,u8 * dst)724 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
725 struct rtllib_rx_stats *rx_stats,
726 struct rtllib_rxb *rxb, u8 *src, u8 *dst)
727 {
728 struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)skb->data;
729 u16 fc = le16_to_cpu(hdr->frame_control);
730
731 u16 LLCOffset = sizeof(struct ieee80211_hdr_3addr);
732 u16 ChkLength;
733 bool is_aggregate_frame = false;
734 u16 nSubframe_Length;
735 u8 nPadding_Length = 0;
736 u16 SeqNum = 0;
737 struct sk_buff *sub_skb;
738 /* just for debug purpose */
739 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctrl));
740 if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
741 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
742 is_aggregate_frame = true;
743
744 if (RTLLIB_QOS_HAS_SEQ(fc))
745 LLCOffset += 2;
746 if (rx_stats->bContainHTC)
747 LLCOffset += sHTCLng;
748
749 ChkLength = LLCOffset;
750
751 if (skb->len <= ChkLength)
752 return 0;
753
754 skb_pull(skb, LLCOffset);
755 ieee->is_aggregate_frame = is_aggregate_frame;
756 if (!is_aggregate_frame) {
757 rxb->nr_subframes = 1;
758
759 /* altered by clark 3/30/2010
760 * The struct buffer size of the skb indicated to upper layer
761 * must be less than 5000, or the defraged IP datagram
762 * in the IP layer will exceed "ipfrag_high_tresh" and be
763 * discarded. so there must not use the function
764 * "skb_copy" and "skb_clone" for "skb".
765 */
766
767 /* Allocate new skb for releasing to upper layer */
768 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
769 if (!sub_skb)
770 return 0;
771 skb_reserve(sub_skb, 12);
772 skb_put_data(sub_skb, skb->data, skb->len);
773 sub_skb->dev = ieee->dev;
774
775 rxb->subframes[0] = sub_skb;
776
777 memcpy(rxb->src, src, ETH_ALEN);
778 memcpy(rxb->dst, dst, ETH_ALEN);
779 rxb->subframes[0]->dev = ieee->dev;
780 return 1;
781 }
782
783 rxb->nr_subframes = 0;
784 memcpy(rxb->src, src, ETH_ALEN);
785 memcpy(rxb->dst, dst, ETH_ALEN);
786 while (skb->len > ETHERNET_HEADER_SIZE) {
787 /* Offset 12 denote 2 mac address */
788 nSubframe_Length = *((u16 *)(skb->data + 12));
789 nSubframe_Length = (nSubframe_Length >> 8) +
790 (nSubframe_Length << 8);
791
792 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
793 netdev_info(ieee->dev,
794 "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
795 __func__, rxb->nr_subframes);
796 netdev_info(ieee->dev,
797 "%s: A-MSDU parse error!! Subframe Length: %d\n",
798 __func__, nSubframe_Length);
799 netdev_info(ieee->dev,
800 "nRemain_Length is %d and nSubframe_Length is : %d\n",
801 skb->len, nSubframe_Length);
802 netdev_info(ieee->dev,
803 "The Packet SeqNum is %d\n",
804 SeqNum);
805 return 0;
806 }
807
808 /* move the data point to data content */
809 skb_pull(skb, ETHERNET_HEADER_SIZE);
810
811 /* altered by clark 3/30/2010
812 * The struct buffer size of the skb indicated to upper layer
813 * must be less than 5000, or the defraged IP datagram
814 * in the IP layer will exceed "ipfrag_high_tresh" and be
815 * discarded. so there must not use the function
816 * "skb_copy" and "skb_clone" for "skb".
817 */
818
819 /* Allocate new skb for releasing to upper layer */
820 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
821 if (!sub_skb)
822 return 0;
823 skb_reserve(sub_skb, 12);
824 skb_put_data(sub_skb, skb->data, nSubframe_Length);
825
826 sub_skb->dev = ieee->dev;
827 rxb->subframes[rxb->nr_subframes++] = sub_skb;
828 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
829 netdev_dbg(ieee->dev,
830 "ParseSubframe(): Too many Subframes! Packets dropped!\n");
831 break;
832 }
833 skb_pull(skb, nSubframe_Length);
834
835 if (skb->len != 0) {
836 nPadding_Length = 4 - ((nSubframe_Length +
837 ETHERNET_HEADER_SIZE) % 4);
838 if (nPadding_Length == 4)
839 nPadding_Length = 0;
840
841 if (skb->len < nPadding_Length)
842 return 0;
843
844 skb_pull(skb, nPadding_Length);
845 }
846 }
847
848 return rxb->nr_subframes;
849 }
850
rtllib_rx_get_hdrlen(struct rtllib_device * ieee,struct sk_buff * skb,struct rtllib_rx_stats * rx_stats)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 ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
856 u16 fc = le16_to_cpu(hdr->frame_control);
857 size_t hdrlen;
858
859 hdrlen = rtllib_get_hdrlen(fc);
860 if (ht_c_check(ieee, skb->data)) {
861 if (net_ratelimit())
862 netdev_info(ieee->dev, "%s: find HTCControl!\n",
863 __func__);
864 hdrlen += 4;
865 rx_stats->bContainHTC = true;
866 }
867
868 if (RTLLIB_QOS_HAS_SEQ(fc))
869 rx_stats->bIsQosData = true;
870
871 return hdrlen;
872 }
873
rtllib_rx_check_duplicate(struct rtllib_device * ieee,struct sk_buff * skb,u8 multicast)874 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
875 struct sk_buff *skb, u8 multicast)
876 {
877 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
878 u16 fc, sc;
879 u8 frag;
880
881 fc = le16_to_cpu(hdr->frame_control);
882 sc = le16_to_cpu(hdr->seq_ctrl);
883 frag = WLAN_GET_SEQ_FRAG(sc);
884
885 if (!ieee->ht_info->cur_rx_reorder_enable ||
886 !ieee->current_network.qos_data.active ||
887 !IsDataFrame(skb->data) ||
888 IsLegacyDataFrame(skb->data)) {
889 if (!ieee80211_is_beacon(hdr->frame_control)) {
890 if (is_duplicate_packet(ieee, hdr))
891 return -1;
892 }
893 } else {
894 struct rx_ts_record *ts = NULL;
895
896 if (rtllib_get_ts(ieee, (struct ts_common_info **)&ts, hdr->addr2,
897 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
898 if ((fc & (1 << 11)) && (frag == ts->rx_last_frag_num) &&
899 (WLAN_GET_SEQ_SEQ(sc) == ts->rx_last_seq_num))
900 return -1;
901 ts->rx_last_frag_num = frag;
902 ts->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc);
903 } else {
904 netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n",
905 __func__);
906 return -1;
907 }
908 }
909
910 return 0;
911 }
912
rtllib_rx_extract_addr(struct rtllib_device * ieee,struct ieee80211_hdr * hdr,u8 * dst,u8 * src,u8 * bssid)913 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
914 struct ieee80211_hdr *hdr, u8 *dst,
915 u8 *src, u8 *bssid)
916 {
917 u16 fc = le16_to_cpu(hdr->frame_control);
918
919 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
920 case IEEE80211_FCTL_FROMDS:
921 ether_addr_copy(dst, hdr->addr1);
922 ether_addr_copy(src, hdr->addr3);
923 ether_addr_copy(bssid, hdr->addr2);
924 break;
925 case IEEE80211_FCTL_TODS:
926 ether_addr_copy(dst, hdr->addr3);
927 ether_addr_copy(src, hdr->addr2);
928 ether_addr_copy(bssid, hdr->addr1);
929 break;
930 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
931 ether_addr_copy(dst, hdr->addr3);
932 ether_addr_copy(src, hdr->addr4);
933 ether_addr_copy(bssid, ieee->current_network.bssid);
934 break;
935 default:
936 ether_addr_copy(dst, hdr->addr1);
937 ether_addr_copy(src, hdr->addr2);
938 ether_addr_copy(bssid, hdr->addr3);
939 break;
940 }
941 }
942
rtllib_rx_data_filter(struct rtllib_device * ieee,struct ieee80211_hdr * hdr,u8 * dst,u8 * src,u8 * bssid,u8 * addr2)943 static int rtllib_rx_data_filter(struct rtllib_device *ieee, struct ieee80211_hdr *hdr,
944 u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
945 {
946 u8 type, stype;
947 u16 fc = le16_to_cpu(hdr->frame_control);
948 type = WLAN_FC_GET_TYPE(fc);
949 stype = WLAN_FC_GET_STYPE(fc);
950
951 /* Filter frames from different BSS */
952 if (ieee80211_has_a4(hdr->frame_control) &&
953 !ether_addr_equal(ieee->current_network.bssid, bssid) &&
954 !is_zero_ether_addr(ieee->current_network.bssid)) {
955 return -1;
956 }
957
958 /* Nullfunc frames may have PS-bit set, so they must be passed to
959 * hostap_handle_sta_rx() before being dropped here.
960 */
961 if (stype != IEEE80211_STYPE_DATA &&
962 stype != IEEE80211_STYPE_DATA_CFACK &&
963 stype != IEEE80211_STYPE_DATA_CFPOLL &&
964 stype != IEEE80211_STYPE_DATA_CFACKPOLL &&
965 stype != IEEE80211_STYPE_QOS_DATA) {
966 if (stype != IEEE80211_STYPE_NULLFUNC)
967 netdev_dbg(ieee->dev,
968 "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
969 type, stype);
970 return -1;
971 }
972
973 /* packets from our adapter are dropped (echo) */
974 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
975 return -1;
976
977 /* {broad,multi}cast packets to our BSS go through */
978 if (is_multicast_ether_addr(dst)) {
979 if (memcmp(bssid, ieee->current_network.bssid,
980 ETH_ALEN))
981 return -1;
982 }
983 return 0;
984 }
985
rtllib_rx_get_crypt(struct rtllib_device * ieee,struct sk_buff * skb,struct lib80211_crypt_data ** crypt,size_t hdrlen)986 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
987 struct lib80211_crypt_data **crypt, size_t hdrlen)
988 {
989 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
990 u16 fc = le16_to_cpu(hdr->frame_control);
991 int idx = 0;
992
993 if (skb->len >= hdrlen + 3)
994 idx = skb->data[hdrlen + 3] >> 6;
995
996 *crypt = ieee->crypt_info.crypt[idx];
997 /* allow NULL decrypt to indicate an station specific override
998 * for default encryption
999 */
1000 if (*crypt && (!(*crypt)->ops || !(*crypt)->ops->decrypt_mpdu))
1001 *crypt = NULL;
1002
1003 if (!*crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
1004 /* This seems to be triggered by some (multicast?)
1005 * frames from other than current BSS, so just drop the
1006 * frames silently instead of filling system log with
1007 * these reports.
1008 */
1009 netdev_dbg(ieee->dev,
1010 "Decryption failed (not set) (SA= %pM)\n",
1011 hdr->addr2);
1012 return -1;
1013 }
1014
1015 return 0;
1016 }
1017
rtllib_rx_decrypt(struct rtllib_device * ieee,struct sk_buff * skb,struct rtllib_rx_stats * rx_stats,struct lib80211_crypt_data * crypt,size_t hdrlen)1018 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1019 struct rtllib_rx_stats *rx_stats,
1020 struct lib80211_crypt_data *crypt, size_t hdrlen)
1021 {
1022 struct ieee80211_hdr *hdr;
1023 int keyidx = 0;
1024 u16 fc, sc;
1025 u8 frag;
1026
1027 hdr = (struct ieee80211_hdr *)skb->data;
1028 fc = le16_to_cpu(hdr->frame_control);
1029 sc = le16_to_cpu(hdr->seq_ctrl);
1030 frag = WLAN_GET_SEQ_FRAG(sc);
1031
1032 if ((!rx_stats->Decrypted))
1033 ieee->need_sw_enc = 1;
1034 else
1035 ieee->need_sw_enc = 0;
1036
1037 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1038 if ((fc & IEEE80211_FCTL_PROTECTED) && (keyidx < 0)) {
1039 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
1040 return -1;
1041 }
1042
1043 hdr = (struct ieee80211_hdr *)skb->data;
1044 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1045 int flen;
1046 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1047
1048 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag);
1049
1050 if (!frag_skb) {
1051 netdev_dbg(ieee->dev,
1052 "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
1053 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1054 WLAN_GET_SEQ_SEQ(sc), frag);
1055 return -1;
1056 }
1057 flen = skb->len;
1058 if (frag != 0)
1059 flen -= hdrlen;
1060
1061 if (frag_skb->tail + flen > frag_skb->end) {
1062 netdev_warn(ieee->dev,
1063 "%s: host decrypted and reassembled frame did not fit skb\n",
1064 __func__);
1065 rtllib_frag_cache_invalidate(ieee, hdr);
1066 return -1;
1067 }
1068
1069 if (frag == 0) {
1070 /* copy first fragment (including full headers) into
1071 * beginning of the fragment cache skb
1072 */
1073 skb_put_data(frag_skb, skb->data, flen);
1074 } else {
1075 /* append frame payload to the end of the fragment
1076 * cache skb
1077 */
1078 skb_put_data(frag_skb, skb->data + hdrlen, flen);
1079 }
1080 dev_kfree_skb_any(skb);
1081 skb = NULL;
1082
1083 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1084 /* more fragments expected - leave the skb in fragment
1085 * cache for now; it will be delivered to upper layers
1086 * after all fragments have been received
1087 */
1088 return -2;
1089 }
1090
1091 /* this was the last fragment and the frame will be
1092 * delivered, so remove skb from fragment cache
1093 */
1094 skb = frag_skb;
1095 hdr = (struct ieee80211_hdr *)skb->data;
1096 rtllib_frag_cache_invalidate(ieee, hdr);
1097 }
1098
1099 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1100 * encrypted/authenticated
1101 */
1102 if ((fc & IEEE80211_FCTL_PROTECTED) &&
1103 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1104 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
1105 return -1;
1106 }
1107
1108 hdr = (struct ieee80211_hdr *)skb->data;
1109 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
1110 if (/*ieee->ieee802_1x &&*/
1111 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1112 /* pass unencrypted EAPOL frames even if encryption is
1113 * configured
1114 */
1115 struct eapol *eap = (struct eapol *)(skb->data +
1116 24);
1117 netdev_dbg(ieee->dev,
1118 "RX: IEEE 802.1X EAPOL frame: %s\n",
1119 eap_get_type(eap->type));
1120 } else {
1121 netdev_dbg(ieee->dev,
1122 "encryption configured, but RX frame not encrypted (SA= %pM)\n",
1123 hdr->addr2);
1124 return -1;
1125 }
1126 }
1127
1128 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) &&
1129 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1130 struct eapol *eap = (struct eapol *)(skb->data + 24);
1131
1132 netdev_dbg(ieee->dev, "RX: IEEE 802.1X EAPOL frame: %s\n",
1133 eap_get_type(eap->type));
1134 }
1135
1136 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
1137 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1138 netdev_dbg(ieee->dev,
1139 "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
1140 hdr->addr2);
1141 return -1;
1142 }
1143
1144 return 0;
1145 }
1146
rtllib_rx_check_leave_lps(struct rtllib_device * ieee,u8 unicast,u8 nr_subframes)1147 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast,
1148 u8 nr_subframes)
1149 {
1150 if (unicast) {
1151 if (ieee->link_state == MAC80211_LINKED) {
1152 if (((ieee->link_detect_info.NumRxUnicastOkInPeriod +
1153 ieee->link_detect_info.num_tx_ok_in_period) > 8) ||
1154 (ieee->link_detect_info.NumRxUnicastOkInPeriod > 2)) {
1155 ieee->leisure_ps_leave(ieee->dev);
1156 }
1157 }
1158 }
1159 ieee->last_rx_ps_time = jiffies;
1160 }
1161
rtllib_rx_indicate_pkt_legacy(struct rtllib_device * ieee,struct rtllib_rx_stats * rx_stats,struct rtllib_rxb * rxb,u8 * dst,u8 * src)1162 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1163 struct rtllib_rx_stats *rx_stats,
1164 struct rtllib_rxb *rxb,
1165 u8 *dst,
1166 u8 *src)
1167 {
1168 struct net_device *dev = ieee->dev;
1169 u16 ethertype;
1170 int i = 0;
1171
1172 if (!rxb) {
1173 netdev_info(dev, "%s: rxb is NULL!!\n", __func__);
1174 return;
1175 }
1176
1177 for (i = 0; i < rxb->nr_subframes; i++) {
1178 struct sk_buff *sub_skb = rxb->subframes[i];
1179
1180 if (sub_skb) {
1181 /* convert hdr + possible LLC headers
1182 * into Ethernet header
1183 */
1184 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1185 if (sub_skb->len >= 8 &&
1186 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1187 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1188 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1189 /* remove RFC1042 or Bridge-Tunnel encapsulation
1190 * and replace EtherType
1191 */
1192 skb_pull(sub_skb, SNAP_SIZE);
1193 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1194 src);
1195 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1196 dst);
1197 } else {
1198 u16 len;
1199 /* Leave Ethernet header part of hdr
1200 * and full payload
1201 */
1202 len = sub_skb->len;
1203 memcpy(skb_push(sub_skb, 2), &len, 2);
1204 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1205 src);
1206 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1207 dst);
1208 }
1209
1210 ieee->stats.rx_packets++;
1211 ieee->stats.rx_bytes += sub_skb->len;
1212
1213 if (is_multicast_ether_addr(dst))
1214 ieee->stats.multicast++;
1215
1216 /* Indicate the packets to upper layer */
1217 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1218 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1219 sub_skb->dev = dev;
1220 sub_skb->dev->stats.rx_packets++;
1221 sub_skb->dev->stats.rx_bytes += sub_skb->len;
1222 /* 802.11 crc not sufficient */
1223 sub_skb->ip_summed = CHECKSUM_NONE;
1224 netif_rx(sub_skb);
1225 }
1226 }
1227 kfree(rxb);
1228 }
1229
rtllib_rx_InfraAdhoc(struct rtllib_device * ieee,struct sk_buff * skb,struct rtllib_rx_stats * rx_stats)1230 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1231 struct rtllib_rx_stats *rx_stats)
1232 {
1233 struct net_device *dev = ieee->dev;
1234 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1235 struct lib80211_crypt_data *crypt = NULL;
1236 struct rtllib_rxb *rxb = NULL;
1237 struct rx_ts_record *ts = NULL;
1238 u16 fc, sc, SeqNum = 0;
1239 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1240 u8 dst[ETH_ALEN];
1241 u8 src[ETH_ALEN];
1242 u8 bssid[ETH_ALEN] = {0};
1243
1244 size_t hdrlen = 0;
1245 int ret = 0, i = 0;
1246
1247 fc = le16_to_cpu(hdr->frame_control);
1248 type = WLAN_FC_GET_TYPE(fc);
1249 stype = WLAN_FC_GET_STYPE(fc);
1250 sc = le16_to_cpu(hdr->seq_ctrl);
1251
1252 /*Filter pkt not to me*/
1253 multicast = is_multicast_ether_addr(hdr->addr1);
1254 unicast = !multicast;
1255 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1))
1256 goto rx_dropped;
1257
1258 /*Filter pkt has too small length */
1259 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1260 if (skb->len < hdrlen) {
1261 netdev_info(dev,
1262 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1263 __func__);
1264 goto rx_dropped;
1265 }
1266
1267 /* Filter Duplicate pkt */
1268 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1269 if (ret < 0)
1270 goto rx_dropped;
1271
1272 /* Filter CTRL Frame */
1273 if (type == RTLLIB_FTYPE_CTL)
1274 goto rx_dropped;
1275
1276 /* Filter MGNT Frame */
1277 if (type == RTLLIB_FTYPE_MGMT) {
1278 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1279 goto rx_dropped;
1280 else
1281 goto rx_exit;
1282 }
1283
1284 /* Filter WAPI DATA Frame */
1285
1286 /* Update statstics for AP roaming */
1287 ieee->link_detect_info.NumRecvDataInPeriod++;
1288 ieee->link_detect_info.num_rx_ok_in_period++;
1289
1290 /* Data frame - extract src/dst addresses */
1291 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1292
1293 /* Filter Data frames */
1294 ret = rtllib_rx_data_filter(ieee, hdr, dst, src, bssid, hdr->addr2);
1295 if (ret < 0)
1296 goto rx_dropped;
1297
1298 if (skb->len == hdrlen)
1299 goto rx_dropped;
1300
1301 /* Send pspoll based on moredata */
1302 if ((ieee->iw_mode == IW_MODE_INFRA) &&
1303 (ieee->sta_sleep == LPS_IS_SLEEP) &&
1304 (ieee->polling)) {
1305 if (WLAN_FC_MORE_DATA(fc)) {
1306 /* more data bit is set, let's request a new frame
1307 * from the AP
1308 */
1309 rtllib_sta_ps_send_pspoll_frame(ieee);
1310 } else {
1311 ieee->polling = false;
1312 }
1313 }
1314
1315 /* Get crypt if encrypted */
1316 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1317 if (ret == -1)
1318 goto rx_dropped;
1319
1320 /* Decrypt data frame (including reassemble) */
1321 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1322 if (ret == -1)
1323 goto rx_dropped;
1324 else if (ret == -2)
1325 goto rx_exit;
1326
1327 /* Get TS for Rx Reorder */
1328 hdr = (struct ieee80211_hdr *)skb->data;
1329 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1330 && !is_multicast_ether_addr(hdr->addr1)) {
1331 TID = Frame_QoSTID(skb->data);
1332 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1333 rtllib_get_ts(ieee, (struct ts_common_info **)&ts, hdr->addr2, TID,
1334 RX_DIR, true);
1335 if (TID != 0 && TID != 3)
1336 ieee->bis_any_nonbepkts = true;
1337 }
1338
1339 /* Parse rx data frame (For AMSDU) */
1340 /* skb: hdr + (possible reassembled) full plaintext payload */
1341 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1342 if (!rxb)
1343 goto rx_dropped;
1344
1345 /* to parse amsdu packets */
1346 /* qos data packets & reserved bit is 1 */
1347 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1348 /* only to free rxb, and not submit the packets
1349 * to upper layer
1350 */
1351 for (i = 0; i < rxb->nr_subframes; i++)
1352 dev_kfree_skb(rxb->subframes[i]);
1353 kfree(rxb);
1354 rxb = NULL;
1355 goto rx_dropped;
1356 }
1357
1358 /* Update WAPI PN */
1359
1360 /* Check if leave LPS */
1361 if (ieee->is_aggregate_frame)
1362 nr_subframes = rxb->nr_subframes;
1363 else
1364 nr_subframes = 1;
1365 if (unicast)
1366 ieee->link_detect_info.NumRxUnicastOkInPeriod += nr_subframes;
1367 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1368
1369 /* Indicate packets to upper layer or Rx Reorder */
1370 if (!ieee->ht_info->cur_rx_reorder_enable || !ts)
1371 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1372 else
1373 RxReorderIndicatePacket(ieee, rxb, ts, SeqNum);
1374
1375 dev_kfree_skb(skb);
1376
1377 rx_exit:
1378 return 1;
1379
1380 rx_dropped:
1381 ieee->stats.rx_dropped++;
1382
1383 /* Returning 0 indicates to caller that we have not handled the SKB--
1384 * so it is still allocated and can be used again by underlying
1385 * hardware as a DMA target
1386 */
1387 return 0;
1388 }
1389
rtllib_rx_Monitor(struct rtllib_device * ieee,struct sk_buff * skb,struct rtllib_rx_stats * rx_stats)1390 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1391 struct rtllib_rx_stats *rx_stats)
1392 {
1393 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1394 u16 fc = le16_to_cpu(hdr->frame_control);
1395 size_t hdrlen = rtllib_get_hdrlen(fc);
1396
1397 if (skb->len < hdrlen) {
1398 netdev_info(ieee->dev,
1399 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1400 __func__);
1401 return 0;
1402 }
1403
1404 if (ht_c_check(ieee, skb->data)) {
1405 if (net_ratelimit())
1406 netdev_info(ieee->dev, "%s: Find HTCControl!\n",
1407 __func__);
1408 hdrlen += 4;
1409 }
1410
1411 ieee->stats.rx_packets++;
1412 ieee->stats.rx_bytes += skb->len;
1413 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1414
1415 return 1;
1416 }
1417
1418 /* All received frames are sent to this function. @skb contains the frame in
1419 * IEEE 802.11 format, i.e., in the format it was sent over air.
1420 * This function is called only as a tasklet (software IRQ).
1421 */
rtllib_rx(struct rtllib_device * ieee,struct sk_buff * skb,struct rtllib_rx_stats * rx_stats)1422 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1423 struct rtllib_rx_stats *rx_stats)
1424 {
1425 int ret = 0;
1426
1427 if (!ieee || !skb || !rx_stats) {
1428 pr_info("%s: Input parameters NULL!\n", __func__);
1429 goto rx_dropped;
1430 }
1431 if (skb->len < 10) {
1432 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
1433 goto rx_dropped;
1434 }
1435
1436 switch (ieee->iw_mode) {
1437 case IW_MODE_INFRA:
1438 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1439 break;
1440 case IW_MODE_MONITOR:
1441 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1442 break;
1443 default:
1444 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
1445 break;
1446 }
1447
1448 return ret;
1449
1450 rx_dropped:
1451 if (ieee)
1452 ieee->stats.rx_dropped++;
1453 return 0;
1454 }
1455 EXPORT_SYMBOL(rtllib_rx);
1456
1457 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1458
1459 /* Make ther structure we read from the beacon packet has the right values */
rtllib_verify_qos_info(struct rtllib_qos_information_element * info_element,int sub_type)1460 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1461 *info_element, int sub_type)
1462 {
1463 if (info_element->elementID != QOS_ELEMENT_ID)
1464 return -1;
1465 if (info_element->qui_subtype != sub_type)
1466 return -1;
1467 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1468 return -1;
1469 if (info_element->qui_type != QOS_OUI_TYPE)
1470 return -1;
1471 if (info_element->version != QOS_VERSION_1)
1472 return -1;
1473
1474 return 0;
1475 }
1476
1477 /* Parse a QoS parameter element */
rtllib_read_qos_param_element(struct rtllib_qos_parameter_info * element_param,struct rtllib_info_element * info_element)1478 static int rtllib_read_qos_param_element(
1479 struct rtllib_qos_parameter_info *element_param,
1480 struct rtllib_info_element *info_element)
1481 {
1482 size_t size = sizeof(*element_param);
1483
1484 if (!element_param || !info_element || info_element->len != size - 2)
1485 return -1;
1486
1487 memcpy(element_param, info_element, size);
1488 return rtllib_verify_qos_info(&element_param->info_element,
1489 QOS_OUI_PARAM_SUB_TYPE);
1490 }
1491
1492 /* Parse a QoS information element */
rtllib_read_qos_info_element(struct rtllib_qos_information_element * element_info,struct rtllib_info_element * info_element)1493 static int rtllib_read_qos_info_element(
1494 struct rtllib_qos_information_element *element_info,
1495 struct rtllib_info_element *info_element)
1496 {
1497 size_t size = sizeof(*element_info);
1498
1499 if (!element_info || !info_element || info_element->len != size - 2)
1500 return -1;
1501
1502 memcpy(element_info, info_element, size);
1503 return rtllib_verify_qos_info(element_info, QOS_OUI_INFO_SUB_TYPE);
1504 }
1505
1506 /* Write QoS parameters from the ac parameters. */
rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info * param_elm,struct rtllib_qos_data * qos_data)1507 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1508 struct rtllib_qos_data *qos_data)
1509 {
1510 struct rtllib_qos_ac_parameter *ac_params;
1511 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1512 int i;
1513 u8 aci;
1514 u8 acm;
1515
1516 qos_data->wmm_acm = 0;
1517 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1518 ac_params = &(param_elm->ac_params_record[i]);
1519
1520 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1521 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1522
1523 if (aci >= QOS_QUEUE_NUM)
1524 continue;
1525 switch (aci) {
1526 case 1:
1527 /* BIT(0) | BIT(3) */
1528 if (acm)
1529 qos_data->wmm_acm |= (0x01 << 0) | (0x01 << 3);
1530 break;
1531 case 2:
1532 /* BIT(4) | BIT(5) */
1533 if (acm)
1534 qos_data->wmm_acm |= (0x01 << 4) | (0x01 << 5);
1535 break;
1536 case 3:
1537 /* BIT(6) | BIT(7) */
1538 if (acm)
1539 qos_data->wmm_acm |= (0x01 << 6) | (0x01 << 7);
1540 break;
1541 case 0:
1542 default:
1543 /* BIT(1) | BIT(2) */
1544 if (acm)
1545 qos_data->wmm_acm |= (0x01 << 1) | (0x01 << 2);
1546 break;
1547 }
1548
1549 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1550
1551 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1552 qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2);
1553
1554 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max &
1555 0x0F);
1556
1557 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max &
1558 0xF0) >> 4);
1559
1560 qos_param->flag[aci] =
1561 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1562 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1563 }
1564 return 0;
1565 }
1566
1567 /* we have a generic data element which it may contain QoS information or
1568 * parameters element. check the information element length to decide
1569 * which type to read
1570 */
rtllib_parse_qos_info_param_IE(struct rtllib_device * ieee,struct rtllib_info_element * info_element,struct rtllib_network * network)1571 static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee,
1572 struct rtllib_info_element
1573 *info_element,
1574 struct rtllib_network *network)
1575 {
1576 int rc = 0;
1577 struct rtllib_qos_information_element qos_info_element;
1578
1579 rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1580
1581 if (rc == 0) {
1582 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1583 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1584 } else {
1585 struct rtllib_qos_parameter_info param_element;
1586
1587 rc = rtllib_read_qos_param_element(¶m_element,
1588 info_element);
1589 if (rc == 0) {
1590 rtllib_qos_convert_ac_to_parameters(¶m_element,
1591 &(network->qos_data));
1592 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1593 network->qos_data.param_count =
1594 param_element.info_element.ac_info & 0x0F;
1595 }
1596 }
1597
1598 if (rc == 0) {
1599 netdev_dbg(ieee->dev, "QoS is supported\n");
1600 network->qos_data.supported = 1;
1601 }
1602 return rc;
1603 }
1604
get_info_element_string(u16 id)1605 static const char *get_info_element_string(u16 id)
1606 {
1607 switch (id) {
1608 case MFIE_TYPE_SSID:
1609 return "SSID";
1610 case MFIE_TYPE_RATES:
1611 return "RATES";
1612 case MFIE_TYPE_FH_SET:
1613 return "FH_SET";
1614 case MFIE_TYPE_DS_SET:
1615 return "DS_SET";
1616 case MFIE_TYPE_CF_SET:
1617 return "CF_SET";
1618 case MFIE_TYPE_TIM:
1619 return "TIM";
1620 case MFIE_TYPE_IBSS_SET:
1621 return "IBSS_SET";
1622 case MFIE_TYPE_COUNTRY:
1623 return "COUNTRY";
1624 case MFIE_TYPE_HOP_PARAMS:
1625 return "HOP_PARAMS";
1626 case MFIE_TYPE_HOP_TABLE:
1627 return "HOP_TABLE";
1628 case MFIE_TYPE_REQUEST:
1629 return "REQUEST";
1630 case MFIE_TYPE_CHALLENGE:
1631 return "CHALLENGE";
1632 case MFIE_TYPE_POWER_CONSTRAINT:
1633 return "POWER_CONSTRAINT";
1634 case MFIE_TYPE_POWER_CAPABILITY:
1635 return "POWER_CAPABILITY";
1636 case MFIE_TYPE_TPC_REQUEST:
1637 return "TPC_REQUEST";
1638 case MFIE_TYPE_TPC_REPORT:
1639 return "TPC_REPORT";
1640 case MFIE_TYPE_SUPP_CHANNELS:
1641 return "SUPP_CHANNELS";
1642 case MFIE_TYPE_CSA:
1643 return "CSA";
1644 case MFIE_TYPE_MEASURE_REQUEST:
1645 return "MEASURE_REQUEST";
1646 case MFIE_TYPE_MEASURE_REPORT:
1647 return "MEASURE_REPORT";
1648 case MFIE_TYPE_QUIET:
1649 return "QUIET";
1650 case MFIE_TYPE_IBSS_DFS:
1651 return "IBSS_DFS";
1652 case MFIE_TYPE_RSN:
1653 return "RSN";
1654 case MFIE_TYPE_RATES_EX:
1655 return "RATES_EX";
1656 case MFIE_TYPE_GENERIC:
1657 return "GENERIC";
1658 case MFIE_TYPE_QOS_PARAMETER:
1659 return "QOS_PARAMETER";
1660 default:
1661 return "UNKNOWN";
1662 }
1663 }
1664
rtllib_parse_mife_generic(struct rtllib_device * ieee,struct rtllib_info_element * info_element,struct rtllib_network * network,u16 * tmp_htcap_len,u16 * tmp_htinfo_len)1665 static void rtllib_parse_mife_generic(struct rtllib_device *ieee,
1666 struct rtllib_info_element *info_element,
1667 struct rtllib_network *network,
1668 u16 *tmp_htcap_len,
1669 u16 *tmp_htinfo_len)
1670 {
1671 u16 ht_realtek_agg_len = 0;
1672 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1673
1674 if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network))
1675 return;
1676 if (info_element->len >= 4 &&
1677 info_element->data[0] == 0x00 &&
1678 info_element->data[1] == 0x50 &&
1679 info_element->data[2] == 0xf2 &&
1680 info_element->data[3] == 0x01) {
1681 network->wpa_ie_len = min(info_element->len + 2,
1682 MAX_WPA_IE_LEN);
1683 memcpy(network->wpa_ie, info_element, network->wpa_ie_len);
1684 return;
1685 }
1686 if (info_element->len == 7 &&
1687 info_element->data[0] == 0x00 &&
1688 info_element->data[1] == 0xe0 &&
1689 info_element->data[2] == 0x4c &&
1690 info_element->data[3] == 0x01 &&
1691 info_element->data[4] == 0x02)
1692 network->Turbo_Enable = 1;
1693
1694 if (*tmp_htcap_len == 0) {
1695 if (info_element->len >= 4 &&
1696 info_element->data[0] == 0x00 &&
1697 info_element->data[1] == 0x90 &&
1698 info_element->data[2] == 0x4c &&
1699 info_element->data[3] == 0x033) {
1700 *tmp_htcap_len = min_t(u8, info_element->len,
1701 MAX_IE_LEN);
1702 if (*tmp_htcap_len != 0) {
1703 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_EWC;
1704 network->bssht.bd_ht_cap_len = min_t(u16, *tmp_htcap_len,
1705 sizeof(network->bssht.bd_ht_cap_buf));
1706 memcpy(network->bssht.bd_ht_cap_buf,
1707 info_element->data,
1708 network->bssht.bd_ht_cap_len);
1709 }
1710 }
1711 if (*tmp_htcap_len != 0) {
1712 network->bssht.bd_support_ht = true;
1713 network->bssht.bd_ht_1r = ((((struct ht_capab_ele *)(network->bssht.bd_ht_cap_buf))->MCS[1]) == 0);
1714 } else {
1715 network->bssht.bd_support_ht = false;
1716 network->bssht.bd_ht_1r = false;
1717 }
1718 }
1719
1720 if (*tmp_htinfo_len == 0) {
1721 if (info_element->len >= 4 &&
1722 info_element->data[0] == 0x00 &&
1723 info_element->data[1] == 0x90 &&
1724 info_element->data[2] == 0x4c &&
1725 info_element->data[3] == 0x034) {
1726 *tmp_htinfo_len = min_t(u8, info_element->len,
1727 MAX_IE_LEN);
1728 if (*tmp_htinfo_len != 0) {
1729 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_EWC;
1730 network->bssht.bd_ht_info_len = min_t(u16, *tmp_htinfo_len,
1731 sizeof(network->bssht.bd_ht_info_buf));
1732 memcpy(network->bssht.bd_ht_info_buf,
1733 info_element->data,
1734 network->bssht.bd_ht_info_len);
1735 }
1736 }
1737 }
1738
1739 if (network->bssht.bd_support_ht) {
1740 if (info_element->len >= 4 &&
1741 info_element->data[0] == 0x00 &&
1742 info_element->data[1] == 0xe0 &&
1743 info_element->data[2] == 0x4c &&
1744 info_element->data[3] == 0x02) {
1745 ht_realtek_agg_len = min_t(u8, info_element->len,
1746 MAX_IE_LEN);
1747 memcpy(ht_realtek_agg_buf, info_element->data,
1748 info_element->len);
1749 }
1750 if (ht_realtek_agg_len >= 5) {
1751 network->realtek_cap_exit = true;
1752 network->bssht.bd_rt2rt_aggregation = true;
1753
1754 if ((ht_realtek_agg_buf[4] == 1) &&
1755 (ht_realtek_agg_buf[5] & 0x02))
1756 network->bssht.bd_rt2rt_long_slot_time = true;
1757
1758 if ((ht_realtek_agg_buf[4] == 1) &&
1759 (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1760 network->bssht.rt2rt_ht_mode |= RT_HT_CAP_USE_92SE;
1761 }
1762 }
1763 if (ht_realtek_agg_len >= 5) {
1764 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1765 network->bssht.rt2rt_ht_mode |= RT_HT_CAP_USE_SOFTAP;
1766 }
1767
1768 if ((info_element->len >= 3 &&
1769 info_element->data[0] == 0x00 &&
1770 info_element->data[1] == 0x05 &&
1771 info_element->data[2] == 0xb5) ||
1772 (info_element->len >= 3 &&
1773 info_element->data[0] == 0x00 &&
1774 info_element->data[1] == 0x0a &&
1775 info_element->data[2] == 0xf7) ||
1776 (info_element->len >= 3 &&
1777 info_element->data[0] == 0x00 &&
1778 info_element->data[1] == 0x10 &&
1779 info_element->data[2] == 0x18)) {
1780 network->broadcom_cap_exist = true;
1781 }
1782 if (info_element->len >= 3 &&
1783 info_element->data[0] == 0x00 &&
1784 info_element->data[1] == 0x0c &&
1785 info_element->data[2] == 0x43)
1786 network->ralink_cap_exist = true;
1787 if ((info_element->len >= 3 &&
1788 info_element->data[0] == 0x00 &&
1789 info_element->data[1] == 0x03 &&
1790 info_element->data[2] == 0x7f) ||
1791 (info_element->len >= 3 &&
1792 info_element->data[0] == 0x00 &&
1793 info_element->data[1] == 0x13 &&
1794 info_element->data[2] == 0x74))
1795 network->atheros_cap_exist = true;
1796
1797 if ((info_element->len >= 3 &&
1798 info_element->data[0] == 0x00 &&
1799 info_element->data[1] == 0x50 &&
1800 info_element->data[2] == 0x43))
1801 network->marvell_cap_exist = true;
1802 if (info_element->len >= 3 &&
1803 info_element->data[0] == 0x00 &&
1804 info_element->data[1] == 0x40 &&
1805 info_element->data[2] == 0x96)
1806 network->cisco_cap_exist = true;
1807
1808 if (info_element->len >= 3 &&
1809 info_element->data[0] == 0x00 &&
1810 info_element->data[1] == 0x0a &&
1811 info_element->data[2] == 0xf5)
1812 network->airgo_cap_exist = true;
1813
1814 if (info_element->len > 4 &&
1815 info_element->data[0] == 0x00 &&
1816 info_element->data[1] == 0x40 &&
1817 info_element->data[2] == 0x96 &&
1818 info_element->data[3] == 0x01) {
1819 if (info_element->len == 6) {
1820 memcpy(network->CcxRmState, &info_element->data[4], 2);
1821 if (network->CcxRmState[0] != 0)
1822 network->bCcxRmEnable = true;
1823 else
1824 network->bCcxRmEnable = false;
1825 network->MBssidMask = network->CcxRmState[1] & 0x07;
1826 if (network->MBssidMask != 0) {
1827 network->bMBssidValid = true;
1828 network->MBssidMask = 0xff <<
1829 (network->MBssidMask);
1830 ether_addr_copy(network->MBssid,
1831 network->bssid);
1832 network->MBssid[5] &= network->MBssidMask;
1833 } else {
1834 network->bMBssidValid = false;
1835 }
1836 } else {
1837 network->bCcxRmEnable = false;
1838 }
1839 }
1840 if (info_element->len > 4 &&
1841 info_element->data[0] == 0x00 &&
1842 info_element->data[1] == 0x40 &&
1843 info_element->data[2] == 0x96 &&
1844 info_element->data[3] == 0x03) {
1845 if (info_element->len == 5) {
1846 network->bWithCcxVerNum = true;
1847 network->BssCcxVerNumber = info_element->data[4];
1848 } else {
1849 network->bWithCcxVerNum = false;
1850 network->BssCcxVerNumber = 0;
1851 }
1852 }
1853 if (info_element->len > 4 &&
1854 info_element->data[0] == 0x00 &&
1855 info_element->data[1] == 0x50 &&
1856 info_element->data[2] == 0xf2 &&
1857 info_element->data[3] == 0x04) {
1858 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n",
1859 info_element->len);
1860 network->wzc_ie_len = min(info_element->len + 2, MAX_WZC_IE_LEN);
1861 memcpy(network->wzc_ie, info_element, network->wzc_ie_len);
1862 }
1863 }
1864
rtllib_parse_mfie_ht_cap(struct rtllib_info_element * info_element,struct rtllib_network * network,u16 * tmp_htcap_len)1865 static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element,
1866 struct rtllib_network *network,
1867 u16 *tmp_htcap_len)
1868 {
1869 struct bss_ht *ht = &network->bssht;
1870
1871 *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
1872 if (*tmp_htcap_len != 0) {
1873 ht->bd_ht_spec_ver = HT_SPEC_VER_EWC;
1874 ht->bd_ht_cap_len = min_t(u16, *tmp_htcap_len,
1875 sizeof(ht->bd_ht_cap_buf));
1876 memcpy(ht->bd_ht_cap_buf, info_element->data, ht->bd_ht_cap_len);
1877
1878 ht->bd_support_ht = true;
1879 ht->bd_ht_1r = ((((struct ht_capab_ele *)
1880 ht->bd_ht_cap_buf))->MCS[1]) == 0;
1881
1882 ht->bd_bandwidth = (enum ht_channel_width)
1883 (((struct ht_capab_ele *)
1884 (ht->bd_ht_cap_buf))->ChlWidth);
1885 } else {
1886 ht->bd_support_ht = false;
1887 ht->bd_ht_1r = false;
1888 ht->bd_bandwidth = HT_CHANNEL_WIDTH_20;
1889 }
1890 }
1891
rtllib_parse_info_param(struct rtllib_device * ieee,struct rtllib_info_element * info_element,u16 length,struct rtllib_network * network,struct rtllib_rx_stats * stats)1892 int rtllib_parse_info_param(struct rtllib_device *ieee,
1893 struct rtllib_info_element *info_element,
1894 u16 length,
1895 struct rtllib_network *network,
1896 struct rtllib_rx_stats *stats)
1897 {
1898 u8 i;
1899 short offset;
1900 u16 tmp_htcap_len = 0;
1901 u16 tmp_htinfo_len = 0;
1902 char rates_str[64];
1903 char *p;
1904
1905 while (length >= sizeof(*info_element)) {
1906 if (sizeof(*info_element) + info_element->len > length) {
1907 netdev_dbg(ieee->dev,
1908 "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
1909 info_element->len + sizeof(*info_element),
1910 length, info_element->id);
1911 /* We stop processing but don't return an error here
1912 * because some misbehaviour APs break this rule. ie.
1913 * Orinoco AP1000.
1914 */
1915 break;
1916 }
1917
1918 switch (info_element->id) {
1919 case MFIE_TYPE_SSID:
1920 if (rtllib_is_empty_essid(info_element->data,
1921 info_element->len)) {
1922 network->flags |= NETWORK_EMPTY_ESSID;
1923 break;
1924 }
1925
1926 network->ssid_len = min(info_element->len,
1927 (u8)IW_ESSID_MAX_SIZE);
1928 memcpy(network->ssid, info_element->data,
1929 network->ssid_len);
1930 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1931 memset(network->ssid + network->ssid_len, 0,
1932 IW_ESSID_MAX_SIZE - network->ssid_len);
1933
1934 netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n",
1935 network->ssid, network->ssid_len);
1936 break;
1937
1938 case MFIE_TYPE_RATES:
1939 p = rates_str;
1940 network->rates_len = min(info_element->len,
1941 MAX_RATES_LENGTH);
1942 for (i = 0; i < network->rates_len; i++) {
1943 network->rates[i] = info_element->data[i];
1944 p += scnprintf(p, sizeof(rates_str) -
1945 (p - rates_str), "%02X ",
1946 network->rates[i]);
1947 if (rtllib_is_ofdm_rate
1948 (info_element->data[i])) {
1949 network->flags |= NETWORK_HAS_OFDM;
1950 if (info_element->data[i] &
1951 RTLLIB_BASIC_RATE_MASK)
1952 network->flags &=
1953 ~NETWORK_HAS_CCK;
1954 }
1955
1956 if (rtllib_is_cck_rate
1957 (info_element->data[i])) {
1958 network->flags |= NETWORK_HAS_CCK;
1959 }
1960 }
1961
1962 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n",
1963 rates_str, network->rates_len);
1964 break;
1965
1966 case MFIE_TYPE_RATES_EX:
1967 p = rates_str;
1968 network->rates_ex_len = min(info_element->len,
1969 MAX_RATES_EX_LENGTH);
1970 for (i = 0; i < network->rates_ex_len; i++) {
1971 network->rates_ex[i] = info_element->data[i];
1972 p += scnprintf(p, sizeof(rates_str) -
1973 (p - rates_str), "%02X ",
1974 network->rates_ex[i]);
1975 if (rtllib_is_ofdm_rate
1976 (info_element->data[i])) {
1977 network->flags |= NETWORK_HAS_OFDM;
1978 if (info_element->data[i] &
1979 RTLLIB_BASIC_RATE_MASK)
1980 network->flags &=
1981 ~NETWORK_HAS_CCK;
1982 }
1983 }
1984
1985 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1986 rates_str, network->rates_ex_len);
1987 break;
1988
1989 case MFIE_TYPE_DS_SET:
1990 netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n",
1991 info_element->data[0]);
1992 network->channel = info_element->data[0];
1993 break;
1994
1995 case MFIE_TYPE_FH_SET:
1996 netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n");
1997 break;
1998
1999 case MFIE_TYPE_CF_SET:
2000 netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n");
2001 break;
2002
2003 case MFIE_TYPE_TIM:
2004 if (info_element->len < 4)
2005 break;
2006
2007 network->tim.tim_count = info_element->data[0];
2008 network->tim.tim_period = info_element->data[1];
2009
2010 network->dtim_period = info_element->data[1];
2011 if (ieee->link_state != MAC80211_LINKED)
2012 break;
2013 network->last_dtim_sta_time = jiffies;
2014
2015 network->dtim_data = RTLLIB_DTIM_VALID;
2016
2017 if (info_element->data[2] & 1)
2018 network->dtim_data |= RTLLIB_DTIM_MBCAST;
2019
2020 offset = (info_element->data[2] >> 1) * 2;
2021
2022 if (ieee->assoc_id < 8 * offset ||
2023 ieee->assoc_id > 8 * (offset + info_element->len - 3))
2024 break;
2025
2026 offset = (ieee->assoc_id / 8) - offset;
2027 if (info_element->data[3 + offset] &
2028 (1 << (ieee->assoc_id % 8)))
2029 network->dtim_data |= RTLLIB_DTIM_UCAST;
2030
2031 network->listen_interval = network->dtim_period;
2032 break;
2033
2034 case MFIE_TYPE_ERP:
2035 network->erp_value = info_element->data[0];
2036 network->flags |= NETWORK_HAS_ERP_VALUE;
2037 netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n",
2038 network->erp_value);
2039 break;
2040 case MFIE_TYPE_IBSS_SET:
2041 network->atim_window = info_element->data[0];
2042 netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n",
2043 network->atim_window);
2044 break;
2045
2046 case MFIE_TYPE_CHALLENGE:
2047 netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n");
2048 break;
2049
2050 case MFIE_TYPE_GENERIC:
2051 netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n",
2052 info_element->len);
2053
2054 rtllib_parse_mife_generic(ieee, info_element, network,
2055 &tmp_htcap_len,
2056 &tmp_htinfo_len);
2057 break;
2058
2059 case MFIE_TYPE_RSN:
2060 netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n",
2061 info_element->len);
2062 network->rsn_ie_len = min(info_element->len + 2,
2063 MAX_WPA_IE_LEN);
2064 memcpy(network->rsn_ie, info_element,
2065 network->rsn_ie_len);
2066 break;
2067
2068 case MFIE_TYPE_HT_CAP:
2069 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n",
2070 info_element->len);
2071
2072 rtllib_parse_mfie_ht_cap(info_element, network,
2073 &tmp_htcap_len);
2074 break;
2075
2076 case MFIE_TYPE_HT_INFO:
2077 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n",
2078 info_element->len);
2079 tmp_htinfo_len = min_t(u8, info_element->len,
2080 MAX_IE_LEN);
2081 if (tmp_htinfo_len) {
2082 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_IEEE;
2083 network->bssht.bd_ht_info_len = tmp_htinfo_len >
2084 sizeof(network->bssht.bd_ht_info_buf) ?
2085 sizeof(network->bssht.bd_ht_info_buf) :
2086 tmp_htinfo_len;
2087 memcpy(network->bssht.bd_ht_info_buf,
2088 info_element->data,
2089 network->bssht.bd_ht_info_len);
2090 }
2091 break;
2092
2093 case MFIE_TYPE_AIRONET:
2094 netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n",
2095 info_element->len);
2096 if (info_element->len > IE_CISCO_FLAG_POSITION) {
2097 network->bWithAironetIE = true;
2098
2099 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2100 & SUPPORT_CKIP_MIC) ||
2101 (info_element->data[IE_CISCO_FLAG_POSITION]
2102 & SUPPORT_CKIP_PK))
2103 network->bCkipSupported = true;
2104 else
2105 network->bCkipSupported = false;
2106 } else {
2107 network->bWithAironetIE = false;
2108 network->bCkipSupported = false;
2109 }
2110 break;
2111 case MFIE_TYPE_QOS_PARAMETER:
2112 netdev_err(ieee->dev,
2113 "QoS Error need to parse QOS_PARAMETER IE\n");
2114 break;
2115
2116 case MFIE_TYPE_COUNTRY:
2117 netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n",
2118 info_element->len);
2119 break;
2120 /* TODO */
2121 default:
2122 netdev_dbg(ieee->dev,
2123 "Unsupported info element: %s (%d)\n",
2124 get_info_element_string(info_element->id),
2125 info_element->id);
2126 break;
2127 }
2128
2129 length -= sizeof(*info_element) + info_element->len;
2130 info_element =
2131 (struct rtllib_info_element *)&info_element->data[info_element->len];
2132 }
2133
2134 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2135 !network->cisco_cap_exist && !network->ralink_cap_exist &&
2136 !network->bssht.bd_rt2rt_aggregation)
2137 network->unknown_cap_exist = true;
2138 else
2139 network->unknown_cap_exist = false;
2140 return 0;
2141 }
2142
rtllib_translate_todbm(u8 signal_strength_index)2143 static long rtllib_translate_todbm(u8 signal_strength_index)
2144 {
2145 long signal_power;
2146
2147 signal_power = (long)((signal_strength_index + 1) >> 1);
2148 signal_power -= 95;
2149
2150 return signal_power;
2151 }
2152
rtllib_network_init(struct rtllib_device * ieee,struct rtllib_probe_response * beacon,struct rtllib_network * network,struct rtllib_rx_stats * stats)2153 static inline int rtllib_network_init(
2154 struct rtllib_device *ieee,
2155 struct rtllib_probe_response *beacon,
2156 struct rtllib_network *network,
2157 struct rtllib_rx_stats *stats)
2158 {
2159 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2160
2161 /* Pull out fixed field data */
2162 ether_addr_copy(network->bssid, beacon->header.addr3);
2163 network->capability = le16_to_cpu(beacon->capability);
2164 network->last_scanned = jiffies;
2165 network->time_stamp[0] = beacon->time_stamp[0];
2166 network->time_stamp[1] = beacon->time_stamp[1];
2167 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2168 /* Where to pull this? beacon->listen_interval;*/
2169 network->listen_interval = 0x0A;
2170 network->rates_len = network->rates_ex_len = 0;
2171 network->ssid_len = 0;
2172 network->hidden_ssid_len = 0;
2173 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2174 network->flags = 0;
2175 network->atim_window = 0;
2176 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2177 0x3 : 0x0;
2178 network->berp_info_valid = false;
2179 network->broadcom_cap_exist = false;
2180 network->ralink_cap_exist = false;
2181 network->atheros_cap_exist = false;
2182 network->cisco_cap_exist = false;
2183 network->unknown_cap_exist = false;
2184 network->realtek_cap_exit = false;
2185 network->marvell_cap_exist = false;
2186 network->airgo_cap_exist = false;
2187 network->Turbo_Enable = 0;
2188 network->SignalStrength = stats->SignalStrength;
2189 network->RSSI = stats->SignalStrength;
2190 network->CountryIeLen = 0;
2191 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2192 ht_initialize_bss_desc(&network->bssht);
2193 network->flags |= NETWORK_HAS_CCK;
2194
2195 network->wpa_ie_len = 0;
2196 network->rsn_ie_len = 0;
2197 network->wzc_ie_len = 0;
2198
2199 if (rtllib_parse_info_param(ieee,
2200 beacon->info_element,
2201 (stats->len - sizeof(*beacon)),
2202 network,
2203 stats))
2204 return 1;
2205
2206 network->mode = 0;
2207
2208 if (network->flags & NETWORK_HAS_OFDM)
2209 network->mode |= WIRELESS_MODE_G;
2210 if (network->flags & NETWORK_HAS_CCK)
2211 network->mode |= WIRELESS_MODE_B;
2212
2213 if (network->mode == 0) {
2214 netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n",
2215 escape_essid(network->ssid, network->ssid_len),
2216 network->bssid);
2217 return 1;
2218 }
2219
2220 if (network->bssht.bd_support_ht) {
2221 if (network->mode & (WIRELESS_MODE_G | WIRELESS_MODE_B))
2222 network->mode = WIRELESS_MODE_N_24G;
2223 }
2224 if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2225 network->flags |= NETWORK_EMPTY_ESSID;
2226 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2227 stats->noise = rtllib_translate_todbm((u8)(100 - stats->signal)) - 25;
2228
2229 memcpy(&network->stats, stats, sizeof(network->stats));
2230
2231 return 0;
2232 }
2233
is_same_network(struct rtllib_network * src,struct rtllib_network * dst,u8 ssidbroad)2234 static inline int is_same_network(struct rtllib_network *src,
2235 struct rtllib_network *dst, u8 ssidbroad)
2236 {
2237 /* A network is only a duplicate if the channel, BSSID, ESSID
2238 * and the capability field (in particular IBSS and BSS) all match.
2239 * We treat all <hidden> with the same BSSID and channel
2240 * as one network
2241 */
2242 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2243 (src->channel == dst->channel) &&
2244 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2245 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2246 (!ssidbroad)) &&
2247 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2248 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2249 ((src->capability & WLAN_CAPABILITY_ESS) ==
2250 (dst->capability & WLAN_CAPABILITY_ESS)));
2251 }
2252
update_network(struct rtllib_device * ieee,struct rtllib_network * dst,struct rtllib_network * src)2253 static inline void update_network(struct rtllib_device *ieee,
2254 struct rtllib_network *dst,
2255 struct rtllib_network *src)
2256 {
2257 int qos_active;
2258 u8 old_param;
2259
2260 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2261 dst->capability = src->capability;
2262 memcpy(dst->rates, src->rates, src->rates_len);
2263 dst->rates_len = src->rates_len;
2264 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2265 dst->rates_ex_len = src->rates_ex_len;
2266 if (src->ssid_len > 0) {
2267 if (dst->ssid_len == 0) {
2268 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2269 dst->hidden_ssid_len = src->ssid_len;
2270 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2271 } else {
2272 memset(dst->ssid, 0, dst->ssid_len);
2273 dst->ssid_len = src->ssid_len;
2274 memcpy(dst->ssid, src->ssid, src->ssid_len);
2275 }
2276 }
2277 dst->mode = src->mode;
2278 dst->flags = src->flags;
2279 dst->time_stamp[0] = src->time_stamp[0];
2280 dst->time_stamp[1] = src->time_stamp[1];
2281 if (src->flags & NETWORK_HAS_ERP_VALUE) {
2282 dst->erp_value = src->erp_value;
2283 dst->berp_info_valid = src->berp_info_valid = true;
2284 }
2285 dst->beacon_interval = src->beacon_interval;
2286 dst->listen_interval = src->listen_interval;
2287 dst->atim_window = src->atim_window;
2288 dst->dtim_period = src->dtim_period;
2289 dst->dtim_data = src->dtim_data;
2290 dst->last_dtim_sta_time = src->last_dtim_sta_time;
2291 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2292
2293 dst->bssht.bd_support_ht = src->bssht.bd_support_ht;
2294 dst->bssht.bd_rt2rt_aggregation = src->bssht.bd_rt2rt_aggregation;
2295 dst->bssht.bd_ht_cap_len = src->bssht.bd_ht_cap_len;
2296 memcpy(dst->bssht.bd_ht_cap_buf, src->bssht.bd_ht_cap_buf,
2297 src->bssht.bd_ht_cap_len);
2298 dst->bssht.bd_ht_info_len = src->bssht.bd_ht_info_len;
2299 memcpy(dst->bssht.bd_ht_info_buf, src->bssht.bd_ht_info_buf,
2300 src->bssht.bd_ht_info_len);
2301 dst->bssht.bd_ht_spec_ver = src->bssht.bd_ht_spec_ver;
2302 dst->bssht.bd_rt2rt_long_slot_time = src->bssht.bd_rt2rt_long_slot_time;
2303 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2304 dst->ralink_cap_exist = src->ralink_cap_exist;
2305 dst->atheros_cap_exist = src->atheros_cap_exist;
2306 dst->realtek_cap_exit = src->realtek_cap_exit;
2307 dst->marvell_cap_exist = src->marvell_cap_exist;
2308 dst->cisco_cap_exist = src->cisco_cap_exist;
2309 dst->airgo_cap_exist = src->airgo_cap_exist;
2310 dst->unknown_cap_exist = src->unknown_cap_exist;
2311 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2312 dst->wpa_ie_len = src->wpa_ie_len;
2313 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2314 dst->rsn_ie_len = src->rsn_ie_len;
2315 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2316 dst->wzc_ie_len = src->wzc_ie_len;
2317
2318 dst->last_scanned = jiffies;
2319 /* qos related parameters */
2320 qos_active = dst->qos_data.active;
2321 old_param = dst->qos_data.param_count;
2322 dst->qos_data.supported = src->qos_data.supported;
2323 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2324 memcpy(&dst->qos_data, &src->qos_data,
2325 sizeof(struct rtllib_qos_data));
2326 if (dst->qos_data.supported == 1) {
2327 if (dst->ssid_len)
2328 netdev_dbg(ieee->dev,
2329 "QoS the network %s is QoS supported\n",
2330 dst->ssid);
2331 else
2332 netdev_dbg(ieee->dev,
2333 "QoS the network is QoS supported\n");
2334 }
2335 dst->qos_data.active = qos_active;
2336 dst->qos_data.old_param_count = old_param;
2337
2338 dst->wmm_info = src->wmm_info;
2339 if (src->wmm_param[0].ac_aci_acm_aifsn ||
2340 src->wmm_param[1].ac_aci_acm_aifsn ||
2341 src->wmm_param[2].ac_aci_acm_aifsn ||
2342 src->wmm_param[3].ac_aci_acm_aifsn)
2343 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2344
2345 dst->SignalStrength = src->SignalStrength;
2346 dst->RSSI = src->RSSI;
2347 dst->Turbo_Enable = src->Turbo_Enable;
2348
2349 dst->CountryIeLen = src->CountryIeLen;
2350 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2351
2352 dst->bWithAironetIE = src->bWithAironetIE;
2353 dst->bCkipSupported = src->bCkipSupported;
2354 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2355 dst->bCcxRmEnable = src->bCcxRmEnable;
2356 dst->MBssidMask = src->MBssidMask;
2357 dst->bMBssidValid = src->bMBssidValid;
2358 memcpy(dst->MBssid, src->MBssid, 6);
2359 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2360 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2361 }
2362
IsPassiveChannel(struct rtllib_device * rtllib,u8 channel)2363 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2364 {
2365 if (channel > MAX_CHANNEL_NUMBER) {
2366 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2367 return 0;
2368 }
2369
2370 if (rtllib->active_channel_map[channel] == 2)
2371 return 1;
2372
2373 return 0;
2374 }
2375
rtllib_legal_channel(struct rtllib_device * rtllib,u8 channel)2376 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2377 {
2378 if (channel > MAX_CHANNEL_NUMBER) {
2379 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2380 return 0;
2381 }
2382 if (rtllib->active_channel_map[channel] > 0)
2383 return 1;
2384
2385 return 0;
2386 }
2387 EXPORT_SYMBOL(rtllib_legal_channel);
2388
rtllib_process_probe_response(struct rtllib_device * ieee,struct rtllib_probe_response * beacon,struct rtllib_rx_stats * stats)2389 static inline void rtllib_process_probe_response(
2390 struct rtllib_device *ieee,
2391 struct rtllib_probe_response *beacon,
2392 struct rtllib_rx_stats *stats)
2393 {
2394 struct rtllib_network *target;
2395 struct rtllib_network *oldest = NULL;
2396 struct rtllib_info_element *info_element = &beacon->info_element[0];
2397 unsigned long flags;
2398 short renew;
2399 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2400 GFP_ATOMIC);
2401 __le16 frame_ctl = beacon->header.frame_control;
2402
2403 if (!network)
2404 return;
2405
2406 netdev_dbg(ieee->dev,
2407 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2408 escape_essid(info_element->data, info_element->len),
2409 beacon->header.addr3,
2410 (le16_to_cpu(beacon->capability) & (1 << 0xf)) ? '1' : '0',
2411 (le16_to_cpu(beacon->capability) & (1 << 0xe)) ? '1' : '0',
2412 (le16_to_cpu(beacon->capability) & (1 << 0xd)) ? '1' : '0',
2413 (le16_to_cpu(beacon->capability) & (1 << 0xc)) ? '1' : '0',
2414 (le16_to_cpu(beacon->capability) & (1 << 0xb)) ? '1' : '0',
2415 (le16_to_cpu(beacon->capability) & (1 << 0xa)) ? '1' : '0',
2416 (le16_to_cpu(beacon->capability) & (1 << 0x9)) ? '1' : '0',
2417 (le16_to_cpu(beacon->capability) & (1 << 0x8)) ? '1' : '0',
2418 (le16_to_cpu(beacon->capability) & (1 << 0x7)) ? '1' : '0',
2419 (le16_to_cpu(beacon->capability) & (1 << 0x6)) ? '1' : '0',
2420 (le16_to_cpu(beacon->capability) & (1 << 0x5)) ? '1' : '0',
2421 (le16_to_cpu(beacon->capability) & (1 << 0x4)) ? '1' : '0',
2422 (le16_to_cpu(beacon->capability) & (1 << 0x3)) ? '1' : '0',
2423 (le16_to_cpu(beacon->capability) & (1 << 0x2)) ? '1' : '0',
2424 (le16_to_cpu(beacon->capability) & (1 << 0x1)) ? '1' : '0',
2425 (le16_to_cpu(beacon->capability) & (1 << 0x0)) ? '1' : '0');
2426
2427 if (rtllib_network_init(ieee, beacon, network, stats)) {
2428 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n",
2429 escape_essid(info_element->data, info_element->len),
2430 beacon->header.addr3,
2431 ieee80211_is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2432 goto free_network;
2433 }
2434
2435 if (!rtllib_legal_channel(ieee, network->channel))
2436 goto free_network;
2437
2438 if (ieee80211_is_probe_resp(frame_ctl)) {
2439 if (IsPassiveChannel(ieee, network->channel)) {
2440 netdev_info(ieee->dev,
2441 "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2442 network->channel);
2443 goto free_network;
2444 }
2445 }
2446
2447 /* The network parsed correctly -- so now we scan our known networks
2448 * to see if we can find it in our list.
2449 *
2450 * NOTE: This search is definitely not optimized. Once its doing
2451 * the "right thing" we'll optimize it for efficiency if
2452 * necessary
2453 */
2454
2455 /* Search for this entry in the list and update it if it is
2456 * already there.
2457 */
2458
2459 spin_lock_irqsave(&ieee->lock, flags);
2460 if (is_same_network(&ieee->current_network, network,
2461 (network->ssid_len ? 1 : 0))) {
2462 update_network(ieee, &ieee->current_network, network);
2463 if ((ieee->current_network.mode == WIRELESS_MODE_N_24G ||
2464 ieee->current_network.mode == WIRELESS_MODE_G) &&
2465 ieee->current_network.berp_info_valid) {
2466 if (ieee->current_network.erp_value & ERP_UseProtection)
2467 ieee->current_network.buseprotection = true;
2468 else
2469 ieee->current_network.buseprotection = false;
2470 }
2471 if (ieee80211_is_beacon(frame_ctl)) {
2472 if (ieee->link_state >= MAC80211_LINKED)
2473 ieee->link_detect_info.NumRecvBcnInPeriod++;
2474 }
2475 }
2476 list_for_each_entry(target, &ieee->network_list, list) {
2477 if (is_same_network(target, network,
2478 (target->ssid_len ? 1 : 0)))
2479 break;
2480 if (!oldest || (target->last_scanned < oldest->last_scanned))
2481 oldest = target;
2482 }
2483
2484 /* If we didn't find a match, then get a new network slot to initialize
2485 * with this beacon's information
2486 */
2487 if (&target->list == &ieee->network_list) {
2488 if (list_empty(&ieee->network_free_list)) {
2489 /* If there are no more slots, expire the oldest */
2490 list_del(&oldest->list);
2491 target = oldest;
2492 netdev_dbg(ieee->dev,
2493 "Expired '%s' ( %pM) from network list.\n",
2494 escape_essid(target->ssid, target->ssid_len),
2495 target->bssid);
2496 } else {
2497 /* Otherwise just pull from the free list */
2498 target = list_entry(ieee->network_free_list.next,
2499 struct rtllib_network, list);
2500 list_del(ieee->network_free_list.next);
2501 }
2502
2503 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n",
2504 escape_essid(network->ssid, network->ssid_len),
2505 network->bssid,
2506 ieee80211_is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2507
2508 memcpy(target, network, sizeof(*target));
2509 list_add_tail(&target->list, &ieee->network_list);
2510 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2511 rtllib_softmac_new_net(ieee, network);
2512 } else {
2513 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n",
2514 escape_essid(target->ssid, target->ssid_len),
2515 target->bssid,
2516 ieee80211_is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2517
2518 /* we have an entry and we are going to update it. But this
2519 * entry may be already expired. In this case we do the same
2520 * as we found a new net and call the new_net handler
2521 */
2522 renew = !time_after(target->last_scanned + ieee->scan_age,
2523 jiffies);
2524 if ((!target->ssid_len) &&
2525 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2526 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2527 (strncmp(ieee->current_network.ssid, network->ssid,
2528 network->ssid_len) == 0) &&
2529 (ieee->link_state == MAC80211_NOLINK))))
2530 renew = 1;
2531 update_network(ieee, target, network);
2532 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2533 rtllib_softmac_new_net(ieee, network);
2534 }
2535
2536 spin_unlock_irqrestore(&ieee->lock, flags);
2537 if (ieee80211_is_beacon(frame_ctl) &&
2538 is_same_network(&ieee->current_network, network,
2539 (network->ssid_len ? 1 : 0)) &&
2540 (ieee->link_state == MAC80211_LINKED)) {
2541 ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network);
2542 }
2543 free_network:
2544 kfree(network);
2545 }
2546
rtllib_rx_mgt(struct rtllib_device * ieee,struct sk_buff * skb,struct rtllib_rx_stats * stats)2547 static void rtllib_rx_mgt(struct rtllib_device *ieee,
2548 struct sk_buff *skb,
2549 struct rtllib_rx_stats *stats)
2550 {
2551 struct ieee80211_hdr *header = (struct ieee80211_hdr *)skb->data;
2552
2553 if (!ieee80211_is_probe_resp(header->frame_control) &&
2554 (!ieee80211_is_beacon(header->frame_control)))
2555 ieee->last_rx_ps_time = jiffies;
2556
2557 if (ieee80211_is_beacon(header->frame_control)) {
2558 netdev_dbg(ieee->dev, "received BEACON\n");
2559 rtllib_process_probe_response(
2560 ieee, (struct rtllib_probe_response *)header,
2561 stats);
2562
2563 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2564 ieee->iw_mode == IW_MODE_INFRA &&
2565 ieee->link_state == MAC80211_LINKED))
2566 schedule_work(&ieee->ps_task);
2567 } else if (ieee80211_is_probe_resp(header->frame_control)) {
2568 netdev_dbg(ieee->dev, "received PROBE RESPONSE\n");
2569 rtllib_process_probe_response(ieee,
2570 (struct rtllib_probe_response *)header, stats);
2571 }
2572 }
2573