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[mirror_ubuntu-hirsute-kernel.git] / drivers / staging / rtl8192u / ieee80211 / ieee80211_rx.c
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
12 Few modifications for Realtek's Wi-Fi drivers by
13 Andrea Merello <andrea.merello@gmail.com>
14
15 A special thanks goes to Realtek for their support !
16
17 ******************************************************************************/
18
19
20 #include <linux/compiler.h>
21 #include <linux/errno.h>
22 #include <linux/if_arp.h>
23 #include <linux/in6.h>
24 #include <linux/in.h>
25 #include <linux/ip.h>
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/netdevice.h>
29 #include <linux/pci.h>
30 #include <linux/proc_fs.h>
31 #include <linux/skbuff.h>
32 #include <linux/slab.h>
33 #include <linux/tcp.h>
34 #include <linux/types.h>
35 #include <linux/wireless.h>
36 #include <linux/etherdevice.h>
37 #include <linux/uaccess.h>
38 #include <linux/ctype.h>
39
40 #include "ieee80211.h"
41 #include "dot11d.h"
42 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
43 struct sk_buff *skb,
44 struct ieee80211_rx_stats *rx_stats)
45 {
46 struct rtl_80211_hdr_4addr *hdr = (struct rtl_80211_hdr_4addr *)skb->data;
47 u16 fc = le16_to_cpu(hdr->frame_ctl);
48
49 skb->dev = ieee->dev;
50 skb_reset_mac_header(skb);
51
52 skb_pull(skb, ieee80211_get_hdrlen(fc));
53 skb->pkt_type = PACKET_OTHERHOST;
54 skb->protocol = htons(ETH_P_80211_RAW);
55 memset(skb->cb, 0, sizeof(skb->cb));
56 netif_rx(skb);
57 }
58
59
60 /* Called only as a tasklet (software IRQ) */
61 static struct ieee80211_frag_entry *
62 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
63 unsigned int frag, u8 tid, u8 *src, u8 *dst)
64 {
65 struct ieee80211_frag_entry *entry;
66 int i;
67
68 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
69 entry = &ieee->frag_cache[tid][i];
70 if (entry->skb &&
71 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
72 IEEE80211_DEBUG_FRAG(
73 "expiring fragment cache entry "
74 "seq=%u last_frag=%u\n",
75 entry->seq, entry->last_frag);
76 dev_kfree_skb_any(entry->skb);
77 entry->skb = NULL;
78 }
79
80 if (entry->skb && entry->seq == seq &&
81 (entry->last_frag + 1 == frag || frag == -1) &&
82 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
83 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
84 return entry;
85 }
86
87 return NULL;
88 }
89
90 /* Called only as a tasklet (software IRQ) */
91 static struct sk_buff *
92 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
93 struct rtl_80211_hdr_4addr *hdr)
94 {
95 struct sk_buff *skb = NULL;
96 u16 fc = le16_to_cpu(hdr->frame_ctl);
97 u16 sc = le16_to_cpu(hdr->seq_ctl);
98 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
99 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
100 struct ieee80211_frag_entry *entry;
101 struct rtl_80211_hdr_3addrqos *hdr_3addrqos;
102 struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
103 u8 tid;
104
105 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
106 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr;
107 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
108 tid = UP2AC(tid);
109 tid++;
110 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
111 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr;
112 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
113 tid = UP2AC(tid);
114 tid++;
115 } else {
116 tid = 0;
117 }
118
119 if (frag == 0) {
120 /* Reserve enough space to fit maximum frame length */
121 skb = dev_alloc_skb(ieee->dev->mtu +
122 sizeof(struct rtl_80211_hdr_4addr) +
123 8 /* LLC */ +
124 2 /* alignment */ +
125 8 /* WEP */ +
126 ETH_ALEN /* WDS */ +
127 (IEEE80211_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
128 if (!skb)
129 return NULL;
130
131 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
132 ieee->frag_next_idx[tid]++;
133 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
134 ieee->frag_next_idx[tid] = 0;
135
136 if (entry->skb)
137 dev_kfree_skb_any(entry->skb);
138
139 entry->first_frag_time = jiffies;
140 entry->seq = seq;
141 entry->last_frag = frag;
142 entry->skb = skb;
143 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
144 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
145 } else {
146 /* received a fragment of a frame for which the head fragment
147 * should have already been received */
148 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
149 hdr->addr1);
150 if (entry) {
151 entry->last_frag = frag;
152 skb = entry->skb;
153 }
154 }
155
156 return skb;
157 }
158
159
160 /* Called only as a tasklet (software IRQ) */
161 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
162 struct rtl_80211_hdr_4addr *hdr)
163 {
164 u16 fc = le16_to_cpu(hdr->frame_ctl);
165 u16 sc = le16_to_cpu(hdr->seq_ctl);
166 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
167 struct ieee80211_frag_entry *entry;
168 struct rtl_80211_hdr_3addrqos *hdr_3addrqos;
169 struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
170 u8 tid;
171
172 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
173 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr;
174 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
175 tid = UP2AC(tid);
176 tid++;
177 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
178 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr;
179 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
180 tid = UP2AC(tid);
181 tid++;
182 } else {
183 tid = 0;
184 }
185
186 entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
187 hdr->addr1);
188
189 if (!entry) {
190 IEEE80211_DEBUG_FRAG(
191 "could not invalidate fragment cache "
192 "entry (seq=%u)\n", seq);
193 return -1;
194 }
195
196 entry->skb = NULL;
197 return 0;
198 }
199
200
201
202 /* ieee80211_rx_frame_mgtmt
203 *
204 * Responsible for handling management control frames
205 *
206 * Called by ieee80211_rx */
207 static inline int
208 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
209 struct ieee80211_rx_stats *rx_stats, u16 type,
210 u16 stype)
211 {
212 /* On the struct stats definition there is written that
213 * this is not mandatory.... but seems that the probe
214 * response parser uses it
215 */
216 struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data;
217
218 rx_stats->len = skb->len;
219 ieee80211_rx_mgt(ieee, (struct rtl_80211_hdr_4addr *)skb->data, rx_stats);
220 /* if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) */
221 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
222 /* use ADDR1 to perform address matching for Management frames */
223 dev_kfree_skb_any(skb);
224 return 0;
225 }
226
227 ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
228
229 dev_kfree_skb_any(skb);
230
231 return 0;
232
233 #ifdef NOT_YET
234 if (ieee->iw_mode == IW_MODE_MASTER) {
235 netdev_dbg(ieee->dev, "Master mode not yet supported.\n");
236 return 0;
237 /*
238 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
239 skb->data);*/
240 }
241
242 if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) {
243 if (stype == WLAN_FC_STYPE_BEACON &&
244 ieee->iw_mode == IW_MODE_MASTER) {
245 struct sk_buff *skb2;
246 /* Process beacon frames also in kernel driver to
247 * update STA(AP) table statistics */
248 skb2 = skb_clone(skb, GFP_ATOMIC);
249 if (skb2)
250 hostap_rx(skb2->dev, skb2, rx_stats);
251 }
252
253 /* send management frames to the user space daemon for
254 * processing */
255 ieee->apdevstats.rx_packets++;
256 ieee->apdevstats.rx_bytes += skb->len;
257 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
258 return 0;
259 }
260
261 if (ieee->iw_mode == IW_MODE_MASTER) {
262 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
263 netdev_dbg(skb->dev, "unknown management frame "
264 "(type=0x%02x, stype=0x%02x) dropped\n",
265 type, stype);
266 return -1;
267 }
268
269 hostap_rx(skb->dev, skb, rx_stats);
270 return 0;
271 }
272
273 netdev_dbg(skb->dev, "hostap_rx_frame_mgmt: management frame "
274 "received in non-Host AP mode\n");
275 return -1;
276 #endif
277 }
278
279
280
281 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
282 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
283 static unsigned char rfc1042_header[] = {
284 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
285 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
286 static unsigned char bridge_tunnel_header[] = {
287 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
288 /* No encapsulation header if EtherType < 0x600 (=length) */
289
290 /* Called by ieee80211_rx_frame_decrypt */
291 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
292 struct sk_buff *skb, size_t hdrlen)
293 {
294 struct net_device *dev = ieee->dev;
295 u16 fc, ethertype;
296 struct rtl_80211_hdr_4addr *hdr;
297 u8 *pos;
298
299 if (skb->len < 24)
300 return 0;
301
302 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
303 fc = le16_to_cpu(hdr->frame_ctl);
304
305 /* check that the frame is unicast frame to us */
306 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
307 IEEE80211_FCTL_TODS &&
308 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
309 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
310 /* ToDS frame with own addr BSSID and DA */
311 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
312 IEEE80211_FCTL_FROMDS &&
313 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
314 /* FromDS frame with own addr as DA */
315 } else
316 return 0;
317
318 if (skb->len < 24 + 8)
319 return 0;
320
321 /* check for port access entity Ethernet type */
322 // pos = skb->data + 24;
323 pos = skb->data + hdrlen;
324 ethertype = (pos[6] << 8) | pos[7];
325 if (ethertype == ETH_P_PAE)
326 return 1;
327
328 return 0;
329 }
330
331 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
332 static inline int
333 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
334 struct ieee80211_crypt_data *crypt)
335 {
336 struct rtl_80211_hdr_4addr *hdr;
337 int res, hdrlen;
338
339 if (!crypt || !crypt->ops->decrypt_mpdu)
340 return 0;
341 if (ieee->hwsec_active) {
342 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
343 tcb_desc->bHwSec = 1;
344 }
345 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
346 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
347
348 if (ieee->tkip_countermeasures &&
349 strcmp(crypt->ops->name, "TKIP") == 0) {
350 if (net_ratelimit()) {
351 netdev_dbg(ieee->dev, "TKIP countermeasures: dropped "
352 "received packet from %pM\n",
353 hdr->addr2);
354 }
355 return -1;
356 }
357
358 atomic_inc(&crypt->refcnt);
359 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
360 atomic_dec(&crypt->refcnt);
361 if (res < 0) {
362 IEEE80211_DEBUG_DROP(
363 "decryption failed (SA=%pM"
364 ") res=%d\n", hdr->addr2, res);
365 if (res == -2)
366 IEEE80211_DEBUG_DROP("Decryption failed ICV "
367 "mismatch (key %d)\n",
368 skb->data[hdrlen + 3] >> 6);
369 ieee->ieee_stats.rx_discards_undecryptable++;
370 return -1;
371 }
372
373 return res;
374 }
375
376
377 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
378 static inline int
379 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb,
380 int keyidx, struct ieee80211_crypt_data *crypt)
381 {
382 struct rtl_80211_hdr_4addr *hdr;
383 int res, hdrlen;
384
385 if (!crypt || !crypt->ops->decrypt_msdu)
386 return 0;
387 if (ieee->hwsec_active) {
388 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
389 tcb_desc->bHwSec = 1;
390 }
391
392 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
393 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
394
395 atomic_inc(&crypt->refcnt);
396 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
397 atomic_dec(&crypt->refcnt);
398 if (res < 0) {
399 netdev_dbg(ieee->dev, "MSDU decryption/MIC verification failed"
400 " (SA=%pM keyidx=%d)\n",
401 hdr->addr2, keyidx);
402 return -1;
403 }
404
405 return 0;
406 }
407
408
409 /* this function is stolen from ipw2200 driver*/
410 #define IEEE_PACKET_RETRY_TIME (5 * HZ)
411 static int is_duplicate_packet(struct ieee80211_device *ieee,
412 struct rtl_80211_hdr_4addr *header)
413 {
414 u16 fc = le16_to_cpu(header->frame_ctl);
415 u16 sc = le16_to_cpu(header->seq_ctl);
416 u16 seq = WLAN_GET_SEQ_SEQ(sc);
417 u16 frag = WLAN_GET_SEQ_FRAG(sc);
418 u16 *last_seq, *last_frag;
419 unsigned long *last_time;
420 struct rtl_80211_hdr_3addrqos *hdr_3addrqos;
421 struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
422 u8 tid;
423
424
425 //TO2DS and QoS
426 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
427 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)header;
428 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
429 tid = UP2AC(tid);
430 tid++;
431 } else if (IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
432 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)header;
433 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
434 tid = UP2AC(tid);
435 tid++;
436 } else { // no QoS
437 tid = 0;
438 }
439
440 switch (ieee->iw_mode) {
441 case IW_MODE_ADHOC:
442 {
443 struct list_head *p;
444 struct ieee_ibss_seq *entry = NULL;
445 u8 *mac = header->addr2;
446 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
447
448 list_for_each(p, &ieee->ibss_mac_hash[index]) {
449 entry = list_entry(p, struct ieee_ibss_seq, list);
450 if (!memcmp(entry->mac, mac, ETH_ALEN))
451 break;
452 }
453 // if (memcmp(entry->mac, mac, ETH_ALEN)){
454 if (p == &ieee->ibss_mac_hash[index]) {
455 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
456 if (!entry)
457 return 0;
458 memcpy(entry->mac, mac, ETH_ALEN);
459 entry->seq_num[tid] = seq;
460 entry->frag_num[tid] = frag;
461 entry->packet_time[tid] = jiffies;
462 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
463 return 0;
464 }
465 last_seq = &entry->seq_num[tid];
466 last_frag = &entry->frag_num[tid];
467 last_time = &entry->packet_time[tid];
468 break;
469 }
470
471 case IW_MODE_INFRA:
472 last_seq = &ieee->last_rxseq_num[tid];
473 last_frag = &ieee->last_rxfrag_num[tid];
474 last_time = &ieee->last_packet_time[tid];
475
476 break;
477 default:
478 return 0;
479 }
480
481 // if(tid != 0) {
482 // printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
483 // }
484 if ((*last_seq == seq) &&
485 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
486 if (*last_frag == frag)
487 goto drop;
488 if (*last_frag + 1 != frag)
489 /* out-of-order fragment */
490 goto drop;
491 } else
492 *last_seq = seq;
493
494 *last_frag = frag;
495 *last_time = jiffies;
496 return 0;
497
498 drop:
499 // BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
500
501 return 1;
502 }
503
504 static bool AddReorderEntry(struct rx_ts_record *pTS, struct rx_reorder_entry *pReorderEntry)
505 {
506 struct list_head *pList = &pTS->rx_pending_pkt_list;
507 while (pList->next != &pTS->rx_pending_pkt_list) {
508 if (SN_LESS(pReorderEntry->SeqNum, list_entry(pList->next, struct rx_reorder_entry, List)->SeqNum))
509 pList = pList->next;
510 else if (SN_EQUAL(pReorderEntry->SeqNum, list_entry(pList->next, struct rx_reorder_entry, List)->SeqNum))
511 return false;
512 else
513 break;
514 }
515 pReorderEntry->List.next = pList->next;
516 pReorderEntry->List.next->prev = &pReorderEntry->List;
517 pReorderEntry->List.prev = pList;
518 pList->next = &pReorderEntry->List;
519
520 return true;
521 }
522
523 static void indicate_packets(struct ieee80211_device *ieee,
524 struct ieee80211_rxb *rxb)
525 {
526 struct net_device_stats *stats = &ieee->stats;
527 struct net_device *dev = ieee->dev;
528 u16 ethertype;
529 u8 i;
530
531 for (i = 0; i < rxb->nr_subframes; i++) {
532 struct sk_buff *sub_skb = rxb->subframes[i];
533
534 if (!sub_skb)
535 continue;
536
537 /* convert hdr + possible LLC headers into Ethernet header */
538 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
539 if (sub_skb->len >= 8 &&
540 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
541 ethertype != ETH_P_AARP &&
542 ethertype != ETH_P_IPX) ||
543 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
544 /* remove RFC1042 or Bridge-Tunnel encapsulation and
545 * replace EtherType */
546 skb_pull(sub_skb, SNAP_SIZE);
547 } else {
548 /* Leave Ethernet header part of hdr and full payload */
549 put_unaligned_be16(sub_skb->len, skb_push(sub_skb, 2));
550 }
551 memcpy(skb_push(sub_skb, ETH_ALEN), rxb->src, ETH_ALEN);
552 memcpy(skb_push(sub_skb, ETH_ALEN), rxb->dst, ETH_ALEN);
553
554 stats->rx_packets++;
555 stats->rx_bytes += sub_skb->len;
556 if (is_multicast_ether_addr(rxb->dst))
557 stats->multicast++;
558
559 /* Indicate the packets to upper layer */
560 sub_skb->protocol = eth_type_trans(sub_skb, dev);
561 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
562 sub_skb->dev = dev;
563 /* 802.11 crc not sufficient */
564 sub_skb->ip_summed = CHECKSUM_NONE;
565 ieee->last_rx_ps_time = jiffies;
566 netif_rx(sub_skb);
567 }
568 }
569
570 void ieee80211_indicate_packets(struct ieee80211_device *ieee,
571 struct ieee80211_rxb **prxbIndicateArray,
572 u8 index)
573 {
574 u8 i;
575
576 for (i = 0; i < index; i++) {
577 struct ieee80211_rxb *prxb = prxbIndicateArray[i];
578
579 indicate_packets(ieee, prxb);
580 kfree(prxb);
581 prxb = NULL;
582 }
583 }
584
585 static void RxReorderIndicatePacket(struct ieee80211_device *ieee,
586 struct ieee80211_rxb *prxb,
587 struct rx_ts_record *pTS, u16 SeqNum)
588 {
589 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
590 struct rx_reorder_entry *pReorderEntry = NULL;
591 struct ieee80211_rxb **prxbIndicateArray;
592 u8 WinSize = pHTInfo->RxReorderWinSize;
593 u16 WinEnd = (pTS->rx_indicate_seq + WinSize - 1) % 4096;
594 u8 index = 0;
595 bool bMatchWinStart = false, bPktInBuf = false;
596 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Seq is %d,pTS->rx_indicate_seq is %d, WinSize is %d\n", __func__, SeqNum, pTS->rx_indicate_seq, WinSize);
597
598 prxbIndicateArray = kmalloc_array(REORDER_WIN_SIZE,
599 sizeof(struct ieee80211_rxb *),
600 GFP_ATOMIC);
601 if (!prxbIndicateArray)
602 return;
603
604 /* Rx Reorder initialize condition.*/
605 if (pTS->rx_indicate_seq == 0xffff)
606 pTS->rx_indicate_seq = SeqNum;
607
608 /* Drop out the packet which SeqNum is smaller than WinStart */
609 if (SN_LESS(SeqNum, pTS->rx_indicate_seq)) {
610 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
611 pTS->rx_indicate_seq, SeqNum);
612 pHTInfo->RxReorderDropCounter++;
613 {
614 int i;
615 for (i = 0; i < prxb->nr_subframes; i++) {
616 dev_kfree_skb(prxb->subframes[i]);
617 }
618 kfree(prxb);
619 prxb = NULL;
620 }
621
622 kfree(prxbIndicateArray);
623 return;
624 }
625
626 /*
627 * Sliding window manipulation. Conditions includes:
628 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
629 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
630 */
631 if (SN_EQUAL(SeqNum, pTS->rx_indicate_seq)) {
632 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096;
633 bMatchWinStart = true;
634 } else if (SN_LESS(WinEnd, SeqNum)) {
635 if (SeqNum >= (WinSize - 1)) {
636 pTS->rx_indicate_seq = SeqNum + 1 - WinSize;
637 } else {
638 pTS->rx_indicate_seq = 4095 - (WinSize - (SeqNum + 1)) + 1;
639 }
640 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum);
641 }
642
643 /*
644 * Indication process.
645 * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
646 * with the SeqNum smaller than latest WinStart and buffer other packets.
647 */
648 /* For Rx Reorder condition:
649 * 1. All packets with SeqNum smaller than WinStart => Indicate
650 * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
651 */
652 if (bMatchWinStart) {
653 /* Current packet is going to be indicated.*/
654 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
655 pTS->rx_indicate_seq, SeqNum);
656 prxbIndicateArray[0] = prxb;
657 // printk("========================>%s(): SeqNum is %d\n",__func__,SeqNum);
658 index = 1;
659 } else {
660 /* Current packet is going to be inserted into pending list.*/
661 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to ordered list\n",__func__);
662 if (!list_empty(&ieee->RxReorder_Unused_List)) {
663 pReorderEntry = list_entry(ieee->RxReorder_Unused_List.next, struct rx_reorder_entry, List);
664 list_del_init(&pReorderEntry->List);
665
666 /* Make a reorder entry and insert into a the packet list.*/
667 pReorderEntry->SeqNum = SeqNum;
668 pReorderEntry->prxb = prxb;
669 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
670
671 if (!AddReorderEntry(pTS, pReorderEntry)) {
672 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
673 __func__, pTS->rx_indicate_seq, SeqNum);
674 list_add_tail(&pReorderEntry->List, &ieee->RxReorder_Unused_List);
675 {
676 int i;
677 for (i = 0; i < prxb->nr_subframes; i++) {
678 dev_kfree_skb(prxb->subframes[i]);
679 }
680 kfree(prxb);
681 prxb = NULL;
682 }
683 } else {
684 IEEE80211_DEBUG(IEEE80211_DL_REORDER,
685 "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum);
686 }
687 } else {
688 /*
689 * Packets are dropped if there is not enough reorder entries.
690 * This part shall be modified!! We can just indicate all the
691 * packets in buffer and get reorder entries.
692 */
693 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
694 {
695 int i;
696 for (i = 0; i < prxb->nr_subframes; i++) {
697 dev_kfree_skb(prxb->subframes[i]);
698 }
699 kfree(prxb);
700 prxb = NULL;
701 }
702 }
703 }
704
705 /* Check if there is any packet need indicate.*/
706 while (!list_empty(&pTS->rx_pending_pkt_list)) {
707 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
708 pReorderEntry = list_entry(pTS->rx_pending_pkt_list.prev, struct rx_reorder_entry, List);
709 if (SN_LESS(pReorderEntry->SeqNum, pTS->rx_indicate_seq) ||
710 SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq)) {
711 /* This protect buffer from overflow. */
712 if (index >= REORDER_WIN_SIZE) {
713 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
714 bPktInBuf = true;
715 break;
716 }
717
718 list_del_init(&pReorderEntry->List);
719
720 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq))
721 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096;
722
723 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum);
724 prxbIndicateArray[index] = pReorderEntry->prxb;
725 // printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
726 index++;
727
728 list_add_tail(&pReorderEntry->List, &ieee->RxReorder_Unused_List);
729 } else {
730 bPktInBuf = true;
731 break;
732 }
733 }
734
735 /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
736 if (index > 0) {
737 // Cancel previous pending timer.
738 // del_timer_sync(&pTS->rx_pkt_pending_timer);
739 pTS->rx_timeout_indicate_seq = 0xffff;
740
741 // Indicate packets
742 if (index > REORDER_WIN_SIZE) {
743 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder buffer full!! \n");
744 kfree(prxbIndicateArray);
745 return;
746 }
747 ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
748 }
749
750 if (bPktInBuf && pTS->rx_timeout_indicate_seq == 0xffff) {
751 // Set new pending timer.
752 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): SET rx timeout timer\n", __func__);
753 pTS->rx_timeout_indicate_seq = pTS->rx_indicate_seq;
754 if (timer_pending(&pTS->rx_pkt_pending_timer))
755 del_timer_sync(&pTS->rx_pkt_pending_timer);
756 pTS->rx_pkt_pending_timer.expires = jiffies +
757 msecs_to_jiffies(pHTInfo->RxReorderPendingTime);
758 add_timer(&pTS->rx_pkt_pending_timer);
759 }
760
761 kfree(prxbIndicateArray);
762 }
763
764 static u8 parse_subframe(struct ieee80211_device *ieee,
765 struct sk_buff *skb,
766 struct ieee80211_rx_stats *rx_stats,
767 struct ieee80211_rxb *rxb, u8 *src, u8 *dst)
768 {
769 struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data;
770 u16 fc = le16_to_cpu(hdr->frame_ctl);
771
772 u16 LLCOffset = sizeof(struct rtl_80211_hdr_3addr);
773 u16 ChkLength;
774 bool bIsAggregateFrame = false;
775 u16 nSubframe_Length;
776 u8 nPadding_Length = 0;
777 u16 SeqNum = 0;
778
779 struct sk_buff *sub_skb;
780 /* just for debug purpose */
781 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
782
783 if ((IEEE80211_QOS_HAS_SEQ(fc)) && \
784 (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
785 bIsAggregateFrame = true;
786 }
787
788 if (IEEE80211_QOS_HAS_SEQ(fc)) {
789 LLCOffset += 2;
790 }
791
792 if (rx_stats->bContainHTC) {
793 LLCOffset += HTCLNG;
794 }
795 // Null packet, don't indicate it to upper layer
796 ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
797
798 if (skb->len <= ChkLength)
799 return 0;
800
801 skb_pull(skb, LLCOffset);
802
803 if (!bIsAggregateFrame) {
804 rxb->nr_subframes = 1;
805 #ifdef JOHN_NOCPY
806 rxb->subframes[0] = skb;
807 #else
808 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
809 #endif
810
811 memcpy(rxb->src, src, ETH_ALEN);
812 memcpy(rxb->dst, dst, ETH_ALEN);
813 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
814 return 1;
815 } else {
816 rxb->nr_subframes = 0;
817 memcpy(rxb->src, src, ETH_ALEN);
818 memcpy(rxb->dst, dst, ETH_ALEN);
819 while (skb->len > ETHERNET_HEADER_SIZE) {
820 /* Offset 12 denote 2 mac address */
821 nSubframe_Length = *((u16 *)(skb->data + 12));
822 //==m==>change the length order
823 nSubframe_Length = (nSubframe_Length >> 8) + (nSubframe_Length << 8);
824
825 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
826 netdev_dbg(ieee->dev, "A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
827 rxb->nr_subframes);
828 netdev_dbg(ieee->dev, "A-MSDU parse error!! Subframe Length: %d\n", nSubframe_Length);
829 netdev_dbg(ieee->dev, "nRemain_Length is %d and nSubframe_Length is : %d\n", skb->len, nSubframe_Length);
830 netdev_dbg(ieee->dev, "The Packet SeqNum is %d\n", SeqNum);
831 return 0;
832 }
833
834 /* move the data point to data content */
835 skb_pull(skb, ETHERNET_HEADER_SIZE);
836
837 #ifdef JOHN_NOCPY
838 sub_skb = skb_clone(skb, GFP_ATOMIC);
839 sub_skb->len = nSubframe_Length;
840 sub_skb->tail = sub_skb->data + nSubframe_Length;
841 #else
842 /* Allocate new skb for releasing to upper layer */
843 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
844 if (!sub_skb)
845 return 0;
846 skb_reserve(sub_skb, 12);
847 skb_put_data(sub_skb, skb->data, nSubframe_Length);
848 #endif
849 rxb->subframes[rxb->nr_subframes++] = sub_skb;
850 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
851 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
852 break;
853 }
854 skb_pull(skb, nSubframe_Length);
855
856 if (skb->len != 0) {
857 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
858 if (nPadding_Length == 4) {
859 nPadding_Length = 0;
860 }
861
862 if (skb->len < nPadding_Length) {
863 return 0;
864 }
865
866 skb_pull(skb, nPadding_Length);
867 }
868 }
869 #ifdef JOHN_NOCPY
870 dev_kfree_skb(skb);
871 #endif
872 //{just for debug added by david
873 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
874 //}
875 return rxb->nr_subframes;
876 }
877 }
878
879 /* All received frames are sent to this function. @skb contains the frame in
880 * IEEE 802.11 format, i.e., in the format it was sent over air.
881 * This function is called only as a tasklet (software IRQ). */
882 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
883 struct ieee80211_rx_stats *rx_stats)
884 {
885 struct net_device *dev = ieee->dev;
886 struct rtl_80211_hdr_4addr *hdr;
887 //struct rtl_80211_hdr_3addrqos *hdr;
888
889 size_t hdrlen;
890 u16 fc, type, stype, sc;
891 struct net_device_stats *stats;
892 unsigned int frag;
893 //added by amy for reorder
894 u8 TID = 0;
895 u16 SeqNum = 0;
896 struct rx_ts_record *pTS = NULL;
897 //bool bIsAggregateFrame = false;
898 //added by amy for reorder
899 #ifdef NOT_YET
900 struct net_device *wds = NULL;
901 struct net_device *wds = NULL;
902 int from_assoc_ap = 0;
903 void *sta = NULL;
904 #endif
905 // u16 qos_ctl = 0;
906 u8 dst[ETH_ALEN];
907 u8 src[ETH_ALEN];
908 u8 bssid[ETH_ALEN];
909 struct ieee80211_crypt_data *crypt = NULL;
910 int keyidx = 0;
911
912 int i;
913 struct ieee80211_rxb *rxb = NULL;
914 // cheat the hdr type
915 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
916 stats = &ieee->stats;
917
918 if (skb->len < 10) {
919 netdev_info(dev, "SKB length < 10\n");
920 goto rx_dropped;
921 }
922
923 fc = le16_to_cpu(hdr->frame_ctl);
924 type = WLAN_FC_GET_TYPE(fc);
925 stype = WLAN_FC_GET_STYPE(fc);
926 sc = le16_to_cpu(hdr->seq_ctl);
927
928 frag = WLAN_GET_SEQ_FRAG(sc);
929 hdrlen = ieee80211_get_hdrlen(fc);
930
931 if (HTCCheck(ieee, skb->data)) {
932 if (net_ratelimit())
933 netdev_warn(dev, "find HTCControl\n");
934 hdrlen += 4;
935 rx_stats->bContainHTC = true;
936 }
937
938 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
939 #ifdef NOT_YET
940 /* Put this code here so that we avoid duplicating it in all
941 * Rx paths. - Jean II */
942 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
943 /* If spy monitoring on */
944 if (iface->spy_data.spy_number > 0) {
945 struct iw_quality wstats;
946 wstats.level = rx_stats->rssi;
947 wstats.noise = rx_stats->noise;
948 wstats.updated = 6; /* No qual value */
949 /* Update spy records */
950 wireless_spy_update(dev, hdr->addr2, &wstats);
951 }
952 #endif /* IW_WIRELESS_SPY */
953 hostap_update_rx_stats(local->ap, hdr, rx_stats);
954 #endif
955
956 if (ieee->iw_mode == IW_MODE_MONITOR) {
957 ieee80211_monitor_rx(ieee, skb, rx_stats);
958 stats->rx_packets++;
959 stats->rx_bytes += skb->len;
960 return 1;
961 }
962
963 if (ieee->host_decrypt) {
964 int idx = 0;
965 if (skb->len >= hdrlen + 3)
966 idx = skb->data[hdrlen + 3] >> 6;
967 crypt = ieee->crypt[idx];
968 #ifdef NOT_YET
969 sta = NULL;
970
971 /* Use station specific key to override default keys if the
972 * receiver address is a unicast address ("individual RA"). If
973 * bcrx_sta_key parameter is set, station specific key is used
974 * even with broad/multicast targets (this is against IEEE
975 * 802.11, but makes it easier to use different keys with
976 * stations that do not support WEP key mapping). */
977
978 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
979 (void)hostap_handle_sta_crypto(local, hdr, &crypt,
980 &sta);
981 #endif
982
983 /* allow NULL decrypt to indicate an station specific override
984 * for default encryption */
985 if (crypt && (!crypt->ops || !crypt->ops->decrypt_mpdu))
986 crypt = NULL;
987
988 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
989 /* This seems to be triggered by some (multicast?)
990 * frames from other than current BSS, so just drop the
991 * frames silently instead of filling system log with
992 * these reports. */
993 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
994 " (SA=%pM)\n",
995 hdr->addr2);
996 ieee->ieee_stats.rx_discards_undecryptable++;
997 goto rx_dropped;
998 }
999 }
1000
1001 if (skb->len < IEEE80211_DATA_HDR3_LEN)
1002 goto rx_dropped;
1003
1004 // if QoS enabled, should check the sequence for each of the AC
1005 if ((!ieee->pHTInfo->bCurRxReorderEnable) || !ieee->current_network.qos_data.active || !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)) {
1006 if (is_duplicate_packet(ieee, hdr))
1007 goto rx_dropped;
1008
1009 } else {
1010 struct rx_ts_record *pRxTS = NULL;
1011 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid);
1012 if (GetTs(
1013 ieee,
1014 (struct ts_common_info **)&pRxTS,
1015 hdr->addr2,
1016 Frame_QoSTID((u8 *)(skb->data)),
1017 RX_DIR,
1018 true)) {
1019
1020 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->rx_last_frag_num is %d,frag is %d,pRxTS->rx_last_seq_num is %d,seq is %d\n",__func__,pRxTS->rx_last_frag_num,frag,pRxTS->rx_last_seq_num,WLAN_GET_SEQ_SEQ(sc));
1021 if ((fc & (1 << 11)) &&
1022 (frag == pRxTS->rx_last_frag_num) &&
1023 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->rx_last_seq_num)) {
1024 goto rx_dropped;
1025 } else {
1026 pRxTS->rx_last_frag_num = frag;
1027 pRxTS->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc);
1028 }
1029 } else {
1030 IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n", __func__);
1031 goto rx_dropped;
1032 }
1033 }
1034 if (type == IEEE80211_FTYPE_MGMT) {
1035
1036
1037 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1038 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1039 goto rx_dropped;
1040 else
1041 goto rx_exit;
1042 }
1043
1044 /* Data frame - extract src/dst addresses */
1045 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1046 case IEEE80211_FCTL_FROMDS:
1047 memcpy(dst, hdr->addr1, ETH_ALEN);
1048 memcpy(src, hdr->addr3, ETH_ALEN);
1049 memcpy(bssid, hdr->addr2, ETH_ALEN);
1050 break;
1051 case IEEE80211_FCTL_TODS:
1052 memcpy(dst, hdr->addr3, ETH_ALEN);
1053 memcpy(src, hdr->addr2, ETH_ALEN);
1054 memcpy(bssid, hdr->addr1, ETH_ALEN);
1055 break;
1056 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1057 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1058 goto rx_dropped;
1059 memcpy(dst, hdr->addr3, ETH_ALEN);
1060 memcpy(src, hdr->addr4, ETH_ALEN);
1061 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1062 break;
1063 default:
1064 memcpy(dst, hdr->addr1, ETH_ALEN);
1065 memcpy(src, hdr->addr2, ETH_ALEN);
1066 memcpy(bssid, hdr->addr3, ETH_ALEN);
1067 break;
1068 }
1069
1070 #ifdef NOT_YET
1071 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
1072 goto rx_dropped;
1073 if (wds) {
1074 skb->dev = dev = wds;
1075 stats = hostap_get_stats(dev);
1076 }
1077
1078 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1079 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
1080 ieee->stadev &&
1081 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
1082 /* Frame from BSSID of the AP for which we are a client */
1083 skb->dev = dev = ieee->stadev;
1084 stats = hostap_get_stats(dev);
1085 from_assoc_ap = 1;
1086 }
1087
1088 if ((ieee->iw_mode == IW_MODE_MASTER ||
1089 ieee->iw_mode == IW_MODE_REPEAT) &&
1090 !from_assoc_ap) {
1091 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
1092 wds)) {
1093 case AP_RX_CONTINUE_NOT_AUTHORIZED:
1094 case AP_RX_CONTINUE:
1095 break;
1096 case AP_RX_DROP:
1097 goto rx_dropped;
1098 case AP_RX_EXIT:
1099 goto rx_exit;
1100 }
1101 }
1102 #endif
1103 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1104 /* Nullfunc frames may have PS-bit set, so they must be passed to
1105 * hostap_handle_sta_rx() before being dropped here. */
1106 if (stype != IEEE80211_STYPE_DATA &&
1107 stype != IEEE80211_STYPE_DATA_CFACK &&
1108 stype != IEEE80211_STYPE_DATA_CFPOLL &&
1109 stype != IEEE80211_STYPE_DATA_CFACKPOLL &&
1110 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1111 ) {
1112 if (stype != IEEE80211_STYPE_NULLFUNC)
1113 IEEE80211_DEBUG_DROP(
1114 "RX: dropped data frame "
1115 "with no data (type=0x%02x, "
1116 "subtype=0x%02x, len=%d)\n",
1117 type, stype, skb->len);
1118 goto rx_dropped;
1119 }
1120 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1121 goto rx_dropped;
1122
1123 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1124
1125 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1126 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
1127 netdev_dbg(ieee->dev, "decrypt frame error\n");
1128 goto rx_dropped;
1129 }
1130
1131
1132 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1133
1134 /* skb: hdr + (possibly fragmented) plaintext payload */
1135 // PR: FIXME: hostap has additional conditions in the "if" below:
1136 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1137 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1138 int flen;
1139 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1140 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1141
1142 if (!frag_skb) {
1143 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1144 "Rx cannot get skb from fragment "
1145 "cache (morefrag=%d seq=%u frag=%u)\n",
1146 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1147 WLAN_GET_SEQ_SEQ(sc), frag);
1148 goto rx_dropped;
1149 }
1150 flen = skb->len;
1151 if (frag != 0)
1152 flen -= hdrlen;
1153
1154 if (frag_skb->tail + flen > frag_skb->end) {
1155 netdev_warn(dev, "host decrypted and "
1156 "reassembled frame did not fit skb\n");
1157 ieee80211_frag_cache_invalidate(ieee, hdr);
1158 goto rx_dropped;
1159 }
1160
1161 if (frag == 0) {
1162 /* copy first fragment (including full headers) into
1163 * beginning of the fragment cache skb */
1164 skb_put_data(frag_skb, skb->data, flen);
1165 } else {
1166 /* append frame payload to the end of the fragment
1167 * cache skb */
1168 skb_put_data(frag_skb, skb->data + hdrlen, flen);
1169 }
1170 dev_kfree_skb_any(skb);
1171 skb = NULL;
1172
1173 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1174 /* more fragments expected - leave the skb in fragment
1175 * cache for now; it will be delivered to upper layers
1176 * after all fragments have been received */
1177 goto rx_exit;
1178 }
1179
1180 /* this was the last fragment and the frame will be
1181 * delivered, so remove skb from fragment cache */
1182 skb = frag_skb;
1183 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1184 ieee80211_frag_cache_invalidate(ieee, hdr);
1185 }
1186
1187 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1188 * encrypted/authenticated */
1189 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1190 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1191 netdev_dbg(ieee->dev, "==>decrypt msdu error\n");
1192 goto rx_dropped;
1193 }
1194
1195 //added by amy for AP roaming
1196 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1197 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1198
1199 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1200 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1201 if (/*ieee->ieee802_1x &&*/
1202 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1203
1204 #ifdef CONFIG_IEEE80211_DEBUG
1205 /* pass unencrypted EAPOL frames even if encryption is
1206 * configured */
1207 struct eapol *eap = (struct eapol *)(skb->data +
1208 24);
1209 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1210 eap_get_type(eap->type));
1211 #endif
1212 } else {
1213 IEEE80211_DEBUG_DROP(
1214 "encryption configured, but RX "
1215 "frame not encrypted (SA=%pM)\n",
1216 hdr->addr2);
1217 goto rx_dropped;
1218 }
1219 }
1220
1221 #ifdef CONFIG_IEEE80211_DEBUG
1222 if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1223 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1224 struct eapol *eap = (struct eapol *)(skb->data +
1225 24);
1226 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1227 eap_get_type(eap->type));
1228 }
1229 #endif
1230
1231 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1232 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1233 IEEE80211_DEBUG_DROP(
1234 "dropped unencrypted RX data "
1235 "frame from %pM"
1236 " (drop_unencrypted=1)\n",
1237 hdr->addr2);
1238 goto rx_dropped;
1239 }
1240 /*
1241 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1242 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1243 }
1244 */
1245 //added by amy for reorder
1246 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1247 && !is_multicast_ether_addr(hdr->addr1)) {
1248 TID = Frame_QoSTID(skb->data);
1249 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1250 GetTs(ieee, (struct ts_common_info **)&pTS, hdr->addr2, TID, RX_DIR, true);
1251 if (TID != 0 && TID != 3) {
1252 ieee->bis_any_nonbepkts = true;
1253 }
1254 }
1255 //added by amy for reorder
1256 /* skb: hdr + (possible reassembled) full plaintext payload */
1257 //ethertype = (payload[6] << 8) | payload[7];
1258 rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC);
1259 if (!rxb)
1260 goto rx_dropped;
1261 /* to parse amsdu packets */
1262 /* qos data packets & reserved bit is 1 */
1263 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1264 /* only to free rxb, and not submit the packets to upper layer */
1265 for (i = 0; i < rxb->nr_subframes; i++) {
1266 dev_kfree_skb(rxb->subframes[i]);
1267 }
1268 kfree(rxb);
1269 rxb = NULL;
1270 goto rx_dropped;
1271 }
1272
1273 //added by amy for reorder
1274 if (!ieee->pHTInfo->bCurRxReorderEnable || !pTS) {
1275 indicate_packets(ieee, rxb);
1276 kfree(rxb);
1277 rxb = NULL;
1278
1279 } else {
1280 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n", __func__);
1281 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1282 }
1283 #ifndef JOHN_NOCPY
1284 dev_kfree_skb(skb);
1285 #endif
1286
1287 rx_exit:
1288 #ifdef NOT_YET
1289 if (sta)
1290 hostap_handle_sta_release(sta);
1291 #endif
1292 return 1;
1293
1294 rx_dropped:
1295 kfree(rxb);
1296 rxb = NULL;
1297 stats->rx_dropped++;
1298
1299 /* Returning 0 indicates to caller that we have not handled the SKB--
1300 * so it is still allocated and can be used again by underlying
1301 * hardware as a DMA target */
1302 return 0;
1303 }
1304 EXPORT_SYMBOL(ieee80211_rx);
1305
1306 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
1307
1308 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1309
1310 /*
1311 * Make the structure we read from the beacon packet to have
1312 * the right values
1313 */
1314 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1315 *info_element, int sub_type)
1316 {
1317
1318 if (info_element->qui_subtype != sub_type)
1319 return -1;
1320 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1321 return -1;
1322 if (info_element->qui_type != QOS_OUI_TYPE)
1323 return -1;
1324 if (info_element->version != QOS_VERSION_1)
1325 return -1;
1326
1327 return 0;
1328 }
1329
1330
1331 /*
1332 * Parse a QoS parameter element
1333 */
1334 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
1335 *element_param, struct ieee80211_info_element
1336 *info_element)
1337 {
1338 int ret = 0;
1339 u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
1340
1341 if (!info_element || !element_param)
1342 return -1;
1343
1344 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1345 memcpy(element_param->info_element.qui, info_element->data,
1346 info_element->len);
1347 element_param->info_element.elementID = info_element->id;
1348 element_param->info_element.length = info_element->len;
1349 } else
1350 ret = -1;
1351 if (ret == 0)
1352 ret = ieee80211_verify_qos_info(&element_param->info_element,
1353 QOS_OUI_PARAM_SUB_TYPE);
1354 return ret;
1355 }
1356
1357 /*
1358 * Parse a QoS information element
1359 */
1360 static int ieee80211_read_qos_info_element(
1361 struct ieee80211_qos_information_element *element_info,
1362 struct ieee80211_info_element *info_element)
1363 {
1364 int ret = 0;
1365 u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1366
1367 if (!element_info)
1368 return -1;
1369 if (!info_element)
1370 return -1;
1371
1372 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1373 memcpy(element_info->qui, info_element->data,
1374 info_element->len);
1375 element_info->elementID = info_element->id;
1376 element_info->length = info_element->len;
1377 } else
1378 ret = -1;
1379
1380 if (ret == 0)
1381 ret = ieee80211_verify_qos_info(element_info,
1382 QOS_OUI_INFO_SUB_TYPE);
1383 return ret;
1384 }
1385
1386
1387 /*
1388 * Write QoS parameters from the ac parameters.
1389 */
1390 static int ieee80211_qos_convert_ac_to_parameters(
1391 struct ieee80211_qos_parameter_info *param_elm,
1392 struct ieee80211_qos_parameters *qos_param)
1393 {
1394 int i;
1395 struct ieee80211_qos_ac_parameter *ac_params;
1396 u8 aci;
1397 //u8 cw_min;
1398 //u8 cw_max;
1399
1400 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1401 ac_params = &(param_elm->ac_params_record[i]);
1402
1403 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1404
1405 if (aci >= QOS_QUEUE_NUM)
1406 continue;
1407 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1408
1409 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1410 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1411
1412 qos_param->cw_min[aci] =
1413 cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1414
1415 qos_param->cw_max[aci] =
1416 cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1417
1418 qos_param->flag[aci] =
1419 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1420 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1421 }
1422 return 0;
1423 }
1424
1425 /*
1426 * we have a generic data element which it may contain QoS information or
1427 * parameters element. check the information element length to decide
1428 * which type to read
1429 */
1430 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1431 *info_element,
1432 struct ieee80211_network *network)
1433 {
1434 int rc = 0;
1435 struct ieee80211_qos_parameters *qos_param = NULL;
1436 struct ieee80211_qos_information_element qos_info_element;
1437
1438 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1439
1440 if (rc == 0) {
1441 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1442 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1443 } else {
1444 struct ieee80211_qos_parameter_info param_element;
1445
1446 rc = ieee80211_read_qos_param_element(&param_element,
1447 info_element);
1448 if (rc == 0) {
1449 qos_param = &(network->qos_data.parameters);
1450 ieee80211_qos_convert_ac_to_parameters(&param_element,
1451 qos_param);
1452 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1453 network->qos_data.param_count =
1454 param_element.info_element.ac_info & 0x0F;
1455 }
1456 }
1457
1458 if (rc == 0) {
1459 IEEE80211_DEBUG_QOS("QoS is supported\n");
1460 network->qos_data.supported = 1;
1461 }
1462 return rc;
1463 }
1464
1465 #ifdef CONFIG_IEEE80211_DEBUG
1466 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1467
1468 static const char *get_info_element_string(u16 id)
1469 {
1470 switch (id) {
1471 MFIE_STRING(SSID);
1472 MFIE_STRING(RATES);
1473 MFIE_STRING(FH_SET);
1474 MFIE_STRING(DS_SET);
1475 MFIE_STRING(CF_SET);
1476 MFIE_STRING(TIM);
1477 MFIE_STRING(IBSS_SET);
1478 MFIE_STRING(COUNTRY);
1479 MFIE_STRING(HOP_PARAMS);
1480 MFIE_STRING(HOP_TABLE);
1481 MFIE_STRING(REQUEST);
1482 MFIE_STRING(CHALLENGE);
1483 MFIE_STRING(POWER_CONSTRAINT);
1484 MFIE_STRING(POWER_CAPABILITY);
1485 MFIE_STRING(TPC_REQUEST);
1486 MFIE_STRING(TPC_REPORT);
1487 MFIE_STRING(SUPP_CHANNELS);
1488 MFIE_STRING(CSA);
1489 MFIE_STRING(MEASURE_REQUEST);
1490 MFIE_STRING(MEASURE_REPORT);
1491 MFIE_STRING(QUIET);
1492 MFIE_STRING(IBSS_DFS);
1493 // MFIE_STRING(ERP_INFO);
1494 MFIE_STRING(RSN);
1495 MFIE_STRING(RATES_EX);
1496 MFIE_STRING(GENERIC);
1497 MFIE_STRING(QOS_PARAMETER);
1498 default:
1499 return "UNKNOWN";
1500 }
1501 }
1502 #endif
1503
1504 static inline void ieee80211_extract_country_ie(
1505 struct ieee80211_device *ieee,
1506 struct ieee80211_info_element *info_element,
1507 struct ieee80211_network *network,
1508 u8 *addr2
1509 )
1510 {
1511 if (IS_DOT11D_ENABLE(ieee)) {
1512 if (info_element->len != 0) {
1513 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1514 network->CountryIeLen = info_element->len;
1515
1516 if (!IS_COUNTRY_IE_VALID(ieee)) {
1517 dot11d_update_country_ie(ieee, addr2, info_element->len, info_element->data);
1518 }
1519 }
1520
1521 //
1522 // 070305, rcnjko: I update country IE watch dog here because
1523 // some AP (e.g. Cisco 1242) don't include country IE in their
1524 // probe response frame.
1525 //
1526 if (IS_EQUAL_CIE_SRC(ieee, addr2)) {
1527 UPDATE_CIE_WATCHDOG(ieee);
1528 }
1529 }
1530
1531 }
1532
1533 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1534 struct ieee80211_info_element *info_element,
1535 u16 length,
1536 struct ieee80211_network *network,
1537 struct ieee80211_rx_stats *stats)
1538 {
1539 u8 i;
1540 short offset;
1541 u16 tmp_htcap_len = 0;
1542 u16 tmp_htinfo_len = 0;
1543 u16 ht_realtek_agg_len = 0;
1544 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1545 // u16 broadcom_len = 0;
1546 #ifdef CONFIG_IEEE80211_DEBUG
1547 char rates_str[64];
1548 char *p;
1549 #endif
1550
1551 while (length >= sizeof(*info_element)) {
1552 if (sizeof(*info_element) + info_element->len > length) {
1553 IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1554 "info_element->len + 2 > left : "
1555 "info_element->len+2=%zd left=%d, id=%d.\n",
1556 info_element->len +
1557 sizeof(*info_element),
1558 length, info_element->id);
1559 /* We stop processing but don't return an error here
1560 * because some misbehaviour APs break this rule. ie.
1561 * Orinoco AP1000. */
1562 break;
1563 }
1564
1565 switch (info_element->id) {
1566 case MFIE_TYPE_SSID:
1567 if (ieee80211_is_empty_essid(info_element->data,
1568 info_element->len)) {
1569 network->flags |= NETWORK_EMPTY_ESSID;
1570 break;
1571 }
1572
1573 network->ssid_len = min(info_element->len,
1574 (u8)IW_ESSID_MAX_SIZE);
1575 memcpy(network->ssid, info_element->data, network->ssid_len);
1576 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1577 memset(network->ssid + network->ssid_len, 0,
1578 IW_ESSID_MAX_SIZE - network->ssid_len);
1579
1580 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1581 network->ssid, network->ssid_len);
1582 break;
1583
1584 case MFIE_TYPE_RATES:
1585 #ifdef CONFIG_IEEE80211_DEBUG
1586 p = rates_str;
1587 #endif
1588 network->rates_len = min(info_element->len,
1589 MAX_RATES_LENGTH);
1590 for (i = 0; i < network->rates_len; i++) {
1591 network->rates[i] = info_element->data[i];
1592 #ifdef CONFIG_IEEE80211_DEBUG
1593 p += scnprintf(p, sizeof(rates_str) -
1594 (p - rates_str), "%02X ",
1595 network->rates[i]);
1596 #endif
1597 if (ieee80211_is_ofdm_rate
1598 (info_element->data[i])) {
1599 network->flags |= NETWORK_HAS_OFDM;
1600 if (info_element->data[i] &
1601 IEEE80211_BASIC_RATE_MASK)
1602 network->flags &=
1603 ~NETWORK_HAS_CCK;
1604 }
1605 }
1606
1607 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1608 rates_str, network->rates_len);
1609 break;
1610
1611 case MFIE_TYPE_RATES_EX:
1612 #ifdef CONFIG_IEEE80211_DEBUG
1613 p = rates_str;
1614 #endif
1615 network->rates_ex_len = min(info_element->len,
1616 MAX_RATES_EX_LENGTH);
1617 for (i = 0; i < network->rates_ex_len; i++) {
1618 network->rates_ex[i] = info_element->data[i];
1619 #ifdef CONFIG_IEEE80211_DEBUG
1620 p += scnprintf(p, sizeof(rates_str) -
1621 (p - rates_str), "%02X ",
1622 network->rates_ex[i]);
1623 #endif
1624 if (ieee80211_is_ofdm_rate
1625 (info_element->data[i])) {
1626 network->flags |= NETWORK_HAS_OFDM;
1627 if (info_element->data[i] &
1628 IEEE80211_BASIC_RATE_MASK)
1629 network->flags &=
1630 ~NETWORK_HAS_CCK;
1631 }
1632 }
1633
1634 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1635 rates_str, network->rates_ex_len);
1636 break;
1637
1638 case MFIE_TYPE_DS_SET:
1639 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1640 info_element->data[0]);
1641 network->channel = info_element->data[0];
1642 break;
1643
1644 case MFIE_TYPE_FH_SET:
1645 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1646 break;
1647
1648 case MFIE_TYPE_CF_SET:
1649 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1650 break;
1651
1652 case MFIE_TYPE_TIM:
1653 if (info_element->len < 4)
1654 break;
1655
1656 network->tim.tim_count = info_element->data[0];
1657 network->tim.tim_period = info_element->data[1];
1658
1659 network->dtim_period = info_element->data[1];
1660 if (ieee->state != IEEE80211_LINKED)
1661 break;
1662
1663 network->last_dtim_sta_time[0] = stats->mac_time[0];
1664 network->last_dtim_sta_time[1] = stats->mac_time[1];
1665
1666 network->dtim_data = IEEE80211_DTIM_VALID;
1667
1668 if (info_element->data[0] != 0)
1669 break;
1670
1671 if (info_element->data[2] & 1)
1672 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1673
1674 offset = (info_element->data[2] >> 1) * 2;
1675
1676 if (ieee->assoc_id < 8 * offset ||
1677 ieee->assoc_id > 8 * (offset + info_element->len - 3))
1678
1679 break;
1680
1681 offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1682
1683 if (info_element->data[3 + offset] & (1 << (ieee->assoc_id % 8)))
1684 network->dtim_data |= IEEE80211_DTIM_UCAST;
1685
1686 //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1687 break;
1688
1689 case MFIE_TYPE_ERP:
1690 network->erp_value = info_element->data[0];
1691 network->flags |= NETWORK_HAS_ERP_VALUE;
1692 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1693 network->erp_value);
1694 break;
1695 case MFIE_TYPE_IBSS_SET:
1696 network->atim_window = info_element->data[0];
1697 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1698 network->atim_window);
1699 break;
1700
1701 case MFIE_TYPE_CHALLENGE:
1702 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1703 break;
1704
1705 case MFIE_TYPE_GENERIC:
1706 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1707 info_element->len);
1708 if (!ieee80211_parse_qos_info_param_IE(info_element,
1709 network))
1710 break;
1711
1712 if (info_element->len >= 4 &&
1713 info_element->data[0] == 0x00 &&
1714 info_element->data[1] == 0x50 &&
1715 info_element->data[2] == 0xf2 &&
1716 info_element->data[3] == 0x01) {
1717 network->wpa_ie_len = min(info_element->len + 2,
1718 MAX_WPA_IE_LEN);
1719 memcpy(network->wpa_ie, info_element,
1720 network->wpa_ie_len);
1721 break;
1722 }
1723
1724 #ifdef THOMAS_TURBO
1725 if (info_element->len == 7 &&
1726 info_element->data[0] == 0x00 &&
1727 info_element->data[1] == 0xe0 &&
1728 info_element->data[2] == 0x4c &&
1729 info_element->data[3] == 0x01 &&
1730 info_element->data[4] == 0x02) {
1731 network->Turbo_Enable = 1;
1732 }
1733 #endif
1734
1735 //for HTcap and HTinfo parameters
1736 if (tmp_htcap_len == 0) {
1737 if (info_element->len >= 4 &&
1738 info_element->data[0] == 0x00 &&
1739 info_element->data[1] == 0x90 &&
1740 info_element->data[2] == 0x4c &&
1741 info_element->data[3] == 0x033){
1742
1743 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1744 if (tmp_htcap_len != 0) {
1745 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1746 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
1747 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1748 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1749 }
1750 }
1751 if (tmp_htcap_len != 0)
1752 network->bssht.bdSupportHT = true;
1753 else
1754 network->bssht.bdSupportHT = false;
1755 }
1756
1757
1758 if (tmp_htinfo_len == 0) {
1759 if (info_element->len >= 4 &&
1760 info_element->data[0] == 0x00 &&
1761 info_element->data[1] == 0x90 &&
1762 info_element->data[2] == 0x4c &&
1763 info_element->data[3] == 0x034){
1764
1765 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1766 if (tmp_htinfo_len != 0) {
1767 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1768 if (tmp_htinfo_len) {
1769 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
1770 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1771 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1772 }
1773
1774 }
1775
1776 }
1777 }
1778
1779 if (ieee->aggregation) {
1780 if (network->bssht.bdSupportHT) {
1781 if (info_element->len >= 4 &&
1782 info_element->data[0] == 0x00 &&
1783 info_element->data[1] == 0xe0 &&
1784 info_element->data[2] == 0x4c &&
1785 info_element->data[3] == 0x02){
1786
1787 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
1788 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1789
1790 }
1791 if (ht_realtek_agg_len >= 5) {
1792 network->bssht.bdRT2RTAggregation = true;
1793
1794 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1795 network->bssht.bdRT2RTLongSlotTime = true;
1796 }
1797 }
1798
1799 }
1800
1801 //if(tmp_htcap_len !=0 || tmp_htinfo_len != 0)
1802 {
1803 if ((info_element->len >= 3 &&
1804 info_element->data[0] == 0x00 &&
1805 info_element->data[1] == 0x05 &&
1806 info_element->data[2] == 0xb5) ||
1807 (info_element->len >= 3 &&
1808 info_element->data[0] == 0x00 &&
1809 info_element->data[1] == 0x0a &&
1810 info_element->data[2] == 0xf7) ||
1811 (info_element->len >= 3 &&
1812 info_element->data[0] == 0x00 &&
1813 info_element->data[1] == 0x10 &&
1814 info_element->data[2] == 0x18)){
1815
1816 network->broadcom_cap_exist = true;
1817
1818 }
1819 }
1820 if (info_element->len >= 3 &&
1821 info_element->data[0] == 0x00 &&
1822 info_element->data[1] == 0x0c &&
1823 info_element->data[2] == 0x43) {
1824 network->ralink_cap_exist = true;
1825 } else
1826 network->ralink_cap_exist = false;
1827 //added by amy for atheros AP
1828 if ((info_element->len >= 3 &&
1829 info_element->data[0] == 0x00 &&
1830 info_element->data[1] == 0x03 &&
1831 info_element->data[2] == 0x7f) ||
1832 (info_element->len >= 3 &&
1833 info_element->data[0] == 0x00 &&
1834 info_element->data[1] == 0x13 &&
1835 info_element->data[2] == 0x74)) {
1836 netdev_dbg(ieee->dev, "========> athros AP is exist\n");
1837 network->atheros_cap_exist = true;
1838 } else
1839 network->atheros_cap_exist = false;
1840
1841 if (info_element->len >= 3 &&
1842 info_element->data[0] == 0x00 &&
1843 info_element->data[1] == 0x40 &&
1844 info_element->data[2] == 0x96) {
1845 network->cisco_cap_exist = true;
1846 } else
1847 network->cisco_cap_exist = false;
1848 //added by amy for LEAP of cisco
1849 if (info_element->len > 4 &&
1850 info_element->data[0] == 0x00 &&
1851 info_element->data[1] == 0x40 &&
1852 info_element->data[2] == 0x96 &&
1853 info_element->data[3] == 0x01) {
1854 if (info_element->len == 6) {
1855 memcpy(network->CcxRmState, &info_element[4], 2);
1856 if (network->CcxRmState[0] != 0)
1857 network->bCcxRmEnable = true;
1858 else
1859 network->bCcxRmEnable = false;
1860 //
1861 // CCXv4 Table 59-1 MBSSID Masks.
1862 //
1863 network->MBssidMask = network->CcxRmState[1] & 0x07;
1864 if (network->MBssidMask != 0) {
1865 network->bMBssidValid = true;
1866 network->MBssidMask = 0xff << (network->MBssidMask);
1867 ether_addr_copy(network->MBssid, network->bssid);
1868 network->MBssid[5] &= network->MBssidMask;
1869 } else {
1870 network->bMBssidValid = false;
1871 }
1872 } else {
1873 network->bCcxRmEnable = false;
1874 }
1875 }
1876 if (info_element->len > 4 &&
1877 info_element->data[0] == 0x00 &&
1878 info_element->data[1] == 0x40 &&
1879 info_element->data[2] == 0x96 &&
1880 info_element->data[3] == 0x03) {
1881 if (info_element->len == 5) {
1882 network->bWithCcxVerNum = true;
1883 network->BssCcxVerNumber = info_element->data[4];
1884 } else {
1885 network->bWithCcxVerNum = false;
1886 network->BssCcxVerNumber = 0;
1887 }
1888 }
1889 break;
1890
1891 case MFIE_TYPE_RSN:
1892 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1893 info_element->len);
1894 network->rsn_ie_len = min(info_element->len + 2,
1895 MAX_WPA_IE_LEN);
1896 memcpy(network->rsn_ie, info_element,
1897 network->rsn_ie_len);
1898 break;
1899
1900 //HT related element.
1901 case MFIE_TYPE_HT_CAP:
1902 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
1903 info_element->len);
1904 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1905 if (tmp_htcap_len != 0) {
1906 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1907 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
1908 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1909 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1910
1911 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
1912 // windows driver will update WMM parameters each beacon received once connected
1913 // Linux driver is a bit different.
1914 network->bssht.bdSupportHT = true;
1915 } else
1916 network->bssht.bdSupportHT = false;
1917 break;
1918
1919
1920 case MFIE_TYPE_HT_INFO:
1921 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
1922 info_element->len);
1923 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1924 if (tmp_htinfo_len) {
1925 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
1926 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
1927 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1928 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1929 }
1930 break;
1931
1932 case MFIE_TYPE_AIRONET:
1933 IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
1934 info_element->len);
1935 if (info_element->len > IE_CISCO_FLAG_POSITION) {
1936 network->bWithAironetIE = true;
1937
1938 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
1939 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
1940 // by adding an Aironet element and setting one or both of the CKIP negotiation bits."
1941 if ((info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_MIC) ||
1942 (info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_PK)) {
1943 network->bCkipSupported = true;
1944 } else {
1945 network->bCkipSupported = false;
1946 }
1947 } else {
1948 network->bWithAironetIE = false;
1949 network->bCkipSupported = false;
1950 }
1951 break;
1952 case MFIE_TYPE_QOS_PARAMETER:
1953 netdev_err(ieee->dev,
1954 "QoS Error need to parse QOS_PARAMETER IE\n");
1955 break;
1956
1957 case MFIE_TYPE_COUNTRY:
1958 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
1959 info_element->len);
1960 ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
1961 break;
1962 /* TODO */
1963 default:
1964 IEEE80211_DEBUG_MGMT
1965 ("Unsupported info element: %s (%d)\n",
1966 get_info_element_string(info_element->id),
1967 info_element->id);
1968 break;
1969 }
1970
1971 length -= sizeof(*info_element) + info_element->len;
1972 info_element =
1973 (struct ieee80211_info_element *)&info_element->
1974 data[info_element->len];
1975 }
1976
1977 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
1978 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) {
1979 network->unknown_cap_exist = true;
1980 } else {
1981 network->unknown_cap_exist = false;
1982 }
1983 return 0;
1984 }
1985
1986 static inline u8 ieee80211_SignalStrengthTranslate(
1987 u8 CurrSS
1988 )
1989 {
1990 u8 RetSS;
1991
1992 // Step 1. Scale mapping.
1993 if (CurrSS >= 71 && CurrSS <= 100) {
1994 RetSS = 90 + ((CurrSS - 70) / 3);
1995 } else if (CurrSS >= 41 && CurrSS <= 70) {
1996 RetSS = 78 + ((CurrSS - 40) / 3);
1997 } else if (CurrSS >= 31 && CurrSS <= 40) {
1998 RetSS = 66 + (CurrSS - 30);
1999 } else if (CurrSS >= 21 && CurrSS <= 30) {
2000 RetSS = 54 + (CurrSS - 20);
2001 } else if (CurrSS >= 5 && CurrSS <= 20) {
2002 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2003 } else if (CurrSS == 4) {
2004 RetSS = 36;
2005 } else if (CurrSS == 3) {
2006 RetSS = 27;
2007 } else if (CurrSS == 2) {
2008 RetSS = 18;
2009 } else if (CurrSS == 1) {
2010 RetSS = 9;
2011 } else {
2012 RetSS = CurrSS;
2013 }
2014 //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2015
2016 // Step 2. Smoothing.
2017
2018 //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2019
2020 return RetSS;
2021 }
2022
2023 /* 0-100 index */
2024 static long ieee80211_translate_todbm(u8 signal_strength_index)
2025 {
2026 long signal_power; // in dBm.
2027
2028 // Translate to dBm (x=0.5y-95).
2029 signal_power = (long)((signal_strength_index + 1) >> 1);
2030 signal_power -= 95;
2031
2032 return signal_power;
2033 }
2034
2035 static inline int ieee80211_network_init(
2036 struct ieee80211_device *ieee,
2037 struct ieee80211_probe_response *beacon,
2038 struct ieee80211_network *network,
2039 struct ieee80211_rx_stats *stats)
2040 {
2041 #ifdef CONFIG_IEEE80211_DEBUG
2042 //char rates_str[64];
2043 //char *p;
2044 #endif
2045
2046 network->qos_data.active = 0;
2047 network->qos_data.supported = 0;
2048 network->qos_data.param_count = 0;
2049 network->qos_data.old_param_count = 0;
2050
2051 /* Pull out fixed field data */
2052 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2053 network->capability = le16_to_cpu(beacon->capability);
2054 network->last_scanned = jiffies;
2055 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2056 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2057 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2058 /* Where to pull this? beacon->listen_interval;*/
2059 network->listen_interval = 0x0A;
2060 network->rates_len = network->rates_ex_len = 0;
2061 network->last_associate = 0;
2062 network->ssid_len = 0;
2063 network->flags = 0;
2064 network->atim_window = 0;
2065 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2066 0x3 : 0x0;
2067 network->berp_info_valid = false;
2068 network->broadcom_cap_exist = false;
2069 network->ralink_cap_exist = false;
2070 network->atheros_cap_exist = false;
2071 network->cisco_cap_exist = false;
2072 network->unknown_cap_exist = false;
2073 #ifdef THOMAS_TURBO
2074 network->Turbo_Enable = 0;
2075 #endif
2076 network->CountryIeLen = 0;
2077 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2078 //Initialize HT parameters
2079 //ieee80211_ht_initialize(&network->bssht);
2080 HTInitializeBssDesc(&network->bssht);
2081 if (stats->freq == IEEE80211_52GHZ_BAND) {
2082 /* for A band (No DS info) */
2083 network->channel = stats->received_channel;
2084 } else
2085 network->flags |= NETWORK_HAS_CCK;
2086
2087 network->wpa_ie_len = 0;
2088 network->rsn_ie_len = 0;
2089
2090 if (ieee80211_parse_info_param
2091 (ieee, beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2092 return 1;
2093
2094 network->mode = 0;
2095 if (stats->freq == IEEE80211_52GHZ_BAND)
2096 network->mode = IEEE_A;
2097 else {
2098 if (network->flags & NETWORK_HAS_OFDM)
2099 network->mode |= IEEE_G;
2100 if (network->flags & NETWORK_HAS_CCK)
2101 network->mode |= IEEE_B;
2102 }
2103
2104 if (network->mode == 0) {
2105 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
2106 "network.\n",
2107 escape_essid(network->ssid,
2108 network->ssid_len),
2109 network->bssid);
2110 return 1;
2111 }
2112
2113 if (network->bssht.bdSupportHT) {
2114 if (network->mode == IEEE_A)
2115 network->mode = IEEE_N_5G;
2116 else if (network->mode & (IEEE_G | IEEE_B))
2117 network->mode = IEEE_N_24G;
2118 }
2119 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2120 network->flags |= NETWORK_EMPTY_ESSID;
2121
2122 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2123 //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2124 stats->noise = ieee80211_translate_todbm((u8)(100 - stats->signal)) - 25;
2125
2126 memcpy(&network->stats, stats, sizeof(network->stats));
2127
2128 return 0;
2129 }
2130
2131 static inline int is_same_network(struct ieee80211_network *src,
2132 struct ieee80211_network *dst, struct ieee80211_device *ieee)
2133 {
2134 /* A network is only a duplicate if the channel, BSSID, ESSID
2135 * and the capability field (in particular IBSS and BSS) all match.
2136 * We treat all <hidden> with the same BSSID and channel
2137 * as one network */
2138 return //((src->ssid_len == dst->ssid_len) &&
2139 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2140 (src->channel == dst->channel) &&
2141 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2142 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2143 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2144 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2145 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2146 ((src->capability & WLAN_CAPABILITY_BSS) ==
2147 (dst->capability & WLAN_CAPABILITY_BSS)));
2148 }
2149
2150 static inline void update_network(struct ieee80211_network *dst,
2151 struct ieee80211_network *src)
2152 {
2153 int qos_active;
2154 u8 old_param;
2155
2156 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2157 dst->capability = src->capability;
2158 memcpy(dst->rates, src->rates, src->rates_len);
2159 dst->rates_len = src->rates_len;
2160 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2161 dst->rates_ex_len = src->rates_ex_len;
2162 if (src->ssid_len > 0) {
2163 memset(dst->ssid, 0, dst->ssid_len);
2164 dst->ssid_len = src->ssid_len;
2165 memcpy(dst->ssid, src->ssid, src->ssid_len);
2166 }
2167 dst->mode = src->mode;
2168 dst->flags = src->flags;
2169 dst->time_stamp[0] = src->time_stamp[0];
2170 dst->time_stamp[1] = src->time_stamp[1];
2171 if (src->flags & NETWORK_HAS_ERP_VALUE) {
2172 dst->erp_value = src->erp_value;
2173 dst->berp_info_valid = src->berp_info_valid = true;
2174 }
2175 dst->beacon_interval = src->beacon_interval;
2176 dst->listen_interval = src->listen_interval;
2177 dst->atim_window = src->atim_window;
2178 dst->dtim_period = src->dtim_period;
2179 dst->dtim_data = src->dtim_data;
2180 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2181 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2182 memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2183
2184 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2185 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2186 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2187 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, src->bssht.bdHTCapLen);
2188 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2189 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, src->bssht.bdHTInfoLen);
2190 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2191 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2192 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2193 dst->ralink_cap_exist = src->ralink_cap_exist;
2194 dst->atheros_cap_exist = src->atheros_cap_exist;
2195 dst->cisco_cap_exist = src->cisco_cap_exist;
2196 dst->unknown_cap_exist = src->unknown_cap_exist;
2197 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2198 dst->wpa_ie_len = src->wpa_ie_len;
2199 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2200 dst->rsn_ie_len = src->rsn_ie_len;
2201
2202 dst->last_scanned = jiffies;
2203 /* qos related parameters */
2204 //qos_active = src->qos_data.active;
2205 qos_active = dst->qos_data.active;
2206 //old_param = dst->qos_data.old_param_count;
2207 old_param = dst->qos_data.param_count;
2208 if (dst->flags & NETWORK_HAS_QOS_MASK)
2209 memcpy(&dst->qos_data, &src->qos_data,
2210 sizeof(struct ieee80211_qos_data));
2211 else {
2212 dst->qos_data.supported = src->qos_data.supported;
2213 dst->qos_data.param_count = src->qos_data.param_count;
2214 }
2215
2216 if (dst->qos_data.supported == 1) {
2217 dst->QoS_Enable = 1;
2218 if (dst->ssid_len)
2219 IEEE80211_DEBUG_QOS
2220 ("QoS the network %s is QoS supported\n",
2221 dst->ssid);
2222 else
2223 IEEE80211_DEBUG_QOS
2224 ("QoS the network is QoS supported\n");
2225 }
2226 dst->qos_data.active = qos_active;
2227 dst->qos_data.old_param_count = old_param;
2228
2229 /* dst->last_associate is not overwritten */
2230 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2231 if (src->wmm_param[0].aci_aifsn || \
2232 src->wmm_param[1].aci_aifsn || \
2233 src->wmm_param[2].aci_aifsn || \
2234 src->wmm_param[3].aci_aifsn) {
2235 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2236 }
2237 //dst->QoS_Enable = src->QoS_Enable;
2238 #ifdef THOMAS_TURBO
2239 dst->Turbo_Enable = src->Turbo_Enable;
2240 #endif
2241
2242 dst->CountryIeLen = src->CountryIeLen;
2243 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2244
2245 //added by amy for LEAP
2246 dst->bWithAironetIE = src->bWithAironetIE;
2247 dst->bCkipSupported = src->bCkipSupported;
2248 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2249 dst->bCcxRmEnable = src->bCcxRmEnable;
2250 dst->MBssidMask = src->MBssidMask;
2251 dst->bMBssidValid = src->bMBssidValid;
2252 memcpy(dst->MBssid, src->MBssid, 6);
2253 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2254 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2255
2256 }
2257
2258 static inline int is_beacon(__le16 fc)
2259 {
2260 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2261 }
2262
2263 static inline void ieee80211_process_probe_response(
2264 struct ieee80211_device *ieee,
2265 struct ieee80211_probe_response *beacon,
2266 struct ieee80211_rx_stats *stats)
2267 {
2268 struct ieee80211_network *network;
2269 struct ieee80211_network *target;
2270 struct ieee80211_network *oldest = NULL;
2271 #ifdef CONFIG_IEEE80211_DEBUG
2272 struct ieee80211_info_element *info_element = &beacon->info_element[0];
2273 #endif
2274 int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl));
2275 unsigned long flags;
2276 short renew;
2277 u16 capability;
2278 //u8 wmm_info;
2279
2280 network = kzalloc(sizeof(*network), GFP_ATOMIC);
2281 if (!network)
2282 goto out;
2283
2284 capability = le16_to_cpu(beacon->capability);
2285 IEEE80211_DEBUG_SCAN(
2286 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2287 escape_essid(info_element->data, info_element->len),
2288 beacon->header.addr3,
2289 (capability & BIT(0xf)) ? '1' : '0',
2290 (capability & BIT(0xe)) ? '1' : '0',
2291 (capability & BIT(0xd)) ? '1' : '0',
2292 (capability & BIT(0xc)) ? '1' : '0',
2293 (capability & BIT(0xb)) ? '1' : '0',
2294 (capability & BIT(0xa)) ? '1' : '0',
2295 (capability & BIT(0x9)) ? '1' : '0',
2296 (capability & BIT(0x8)) ? '1' : '0',
2297 (capability & BIT(0x7)) ? '1' : '0',
2298 (capability & BIT(0x6)) ? '1' : '0',
2299 (capability & BIT(0x5)) ? '1' : '0',
2300 (capability & BIT(0x4)) ? '1' : '0',
2301 (capability & BIT(0x3)) ? '1' : '0',
2302 (capability & BIT(0x2)) ? '1' : '0',
2303 (capability & BIT(0x1)) ? '1' : '0',
2304 (capability & BIT(0x0)) ? '1' : '0');
2305
2306 if (ieee80211_network_init(ieee, beacon, network, stats)) {
2307 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
2308 escape_essid(info_element->data,
2309 info_element->len),
2310 beacon->header.addr3,
2311 fc == IEEE80211_STYPE_PROBE_RESP ?
2312 "PROBE RESPONSE" : "BEACON");
2313 goto out;
2314 }
2315
2316 // For Asus EeePc request,
2317 // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2318 // wireless adapter should follow the country code.
2319 // (2) If there is no any country code in beacon,
2320 // then wireless adapter should do active scan from ch1~11 and
2321 // passive scan from ch12~14
2322
2323 if (!is_legal_channel(ieee, network->channel))
2324 goto out;
2325 if (ieee->bGlobalDomain) {
2326 if (fc == IEEE80211_STYPE_PROBE_RESP) {
2327 if (IS_COUNTRY_IE_VALID(ieee)) {
2328 // Case 1: Country code
2329 if (!is_legal_channel(ieee, network->channel)) {
2330 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel);
2331 goto out;
2332 }
2333 } else {
2334 // Case 2: No any country code.
2335 // Filter over channel ch12~14
2336 if (network->channel > 11) {
2337 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel);
2338 goto out;
2339 }
2340 }
2341 } else {
2342 if (IS_COUNTRY_IE_VALID(ieee)) {
2343 // Case 1: Country code
2344 if (!is_legal_channel(ieee, network->channel)) {
2345 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network->channel);
2346 goto out;
2347 }
2348 } else {
2349 // Case 2: No any country code.
2350 // Filter over channel ch12~14
2351 if (network->channel > 14) {
2352 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network->channel);
2353 goto out;
2354 }
2355 }
2356 }
2357 }
2358
2359 /* The network parsed correctly -- so now we scan our known networks
2360 * to see if we can find it in our list.
2361 *
2362 * NOTE: This search is definitely not optimized. Once its doing
2363 * the "right thing" we'll optimize it for efficiency if
2364 * necessary */
2365
2366 /* Search for this entry in the list and update it if it is
2367 * already there. */
2368
2369 spin_lock_irqsave(&ieee->lock, flags);
2370
2371 if (is_same_network(&ieee->current_network, network, ieee)) {
2372 update_network(&ieee->current_network, network);
2373 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2374 && ieee->current_network.berp_info_valid){
2375 if (ieee->current_network.erp_value & ERP_UseProtection)
2376 ieee->current_network.buseprotection = true;
2377 else
2378 ieee->current_network.buseprotection = false;
2379 }
2380 if (is_beacon(beacon->header.frame_ctl)) {
2381 if (ieee->state == IEEE80211_LINKED)
2382 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2383 } else //hidden AP
2384 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2385 }
2386
2387 list_for_each_entry(target, &ieee->network_list, list) {
2388 if (is_same_network(target, network, ieee))
2389 break;
2390 if (!oldest ||
2391 (target->last_scanned < oldest->last_scanned))
2392 oldest = target;
2393 }
2394
2395 /* If we didn't find a match, then get a new network slot to initialize
2396 * with this beacon's information */
2397 if (&target->list == &ieee->network_list) {
2398 if (list_empty(&ieee->network_free_list)) {
2399 /* If there are no more slots, expire the oldest */
2400 list_del(&oldest->list);
2401 target = oldest;
2402 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
2403 "network list.\n",
2404 escape_essid(target->ssid,
2405 target->ssid_len),
2406 target->bssid);
2407 } else {
2408 /* Otherwise just pull from the free list */
2409 target = list_entry(ieee->network_free_list.next,
2410 struct ieee80211_network, list);
2411 list_del(ieee->network_free_list.next);
2412 }
2413
2414
2415 #ifdef CONFIG_IEEE80211_DEBUG
2416 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
2417 escape_essid(network->ssid,
2418 network->ssid_len),
2419 network->bssid,
2420 fc == IEEE80211_STYPE_PROBE_RESP ?
2421 "PROBE RESPONSE" : "BEACON");
2422 #endif
2423 memcpy(target, network, sizeof(*target));
2424 list_add_tail(&target->list, &ieee->network_list);
2425 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2426 ieee80211_softmac_new_net(ieee, network);
2427 } else {
2428 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
2429 escape_essid(target->ssid,
2430 target->ssid_len),
2431 target->bssid,
2432 fc == IEEE80211_STYPE_PROBE_RESP ?
2433 "PROBE RESPONSE" : "BEACON");
2434
2435 /* we have an entry and we are going to update it. But this entry may
2436 * be already expired. In this case we do the same as we found a new
2437 * net and call the new_net handler
2438 */
2439 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2440 //YJ,add,080819,for hidden ap
2441 if (is_beacon(beacon->header.frame_ctl) == 0)
2442 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & target->flags);
2443 //if(strncmp(network->ssid, "linksys-c",9) == 0)
2444 // printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags);
2445 if (((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2446 && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\
2447 || ((ieee->current_network.ssid_len == network->ssid_len) && (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK))))
2448 renew = 1;
2449 //YJ,add,080819,for hidden ap,end
2450
2451 update_network(target, network);
2452 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2453 ieee80211_softmac_new_net(ieee, network);
2454 }
2455
2456 spin_unlock_irqrestore(&ieee->lock, flags);
2457 if (is_beacon(beacon->header.frame_ctl) && is_same_network(&ieee->current_network, network, ieee) && \
2458 (ieee->state == IEEE80211_LINKED)) {
2459 if (ieee->handle_beacon)
2460 ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network);
2461 }
2462
2463 out:
2464 kfree(network);
2465 }
2466
2467 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2468 struct rtl_80211_hdr_4addr *header,
2469 struct ieee80211_rx_stats *stats)
2470 {
2471 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2472
2473 case IEEE80211_STYPE_BEACON:
2474 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2475 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2476 IEEE80211_DEBUG_SCAN("Beacon\n");
2477 ieee80211_process_probe_response(
2478 ieee, (struct ieee80211_probe_response *)header, stats);
2479 break;
2480
2481 case IEEE80211_STYPE_PROBE_RESP:
2482 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2483 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2484 IEEE80211_DEBUG_SCAN("Probe response\n");
2485 ieee80211_process_probe_response(
2486 ieee, (struct ieee80211_probe_response *)header, stats);
2487 break;
2488
2489 }
2490 }
2491 EXPORT_SYMBOL(ieee80211_rx_mgt);
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