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