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"
ieee80211_monitor_rx(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats)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 *
ieee80211_frag_cache_find(struct ieee80211_device * ieee,unsigned int seq,unsigned int frag,u8 tid,u8 * src,u8 * dst)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 *
ieee80211_frag_cache_get(struct ieee80211_device * ieee,struct rtl_80211_hdr_4addr * hdr)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) */
ieee80211_frag_cache_invalidate(struct ieee80211_device * ieee,struct rtl_80211_hdr_4addr * hdr)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
ieee80211_rx_frame_mgmt(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats,u16 type,u16 stype)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 */
ieee80211_is_eapol_frame(struct ieee80211_device * ieee,struct sk_buff * skb,size_t hdrlen)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
ieee80211_rx_frame_decrypt(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_crypt_data * crypt)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
ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device * ieee,struct sk_buff * skb,int keyidx,struct ieee80211_crypt_data * crypt)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)
is_duplicate_packet(struct ieee80211_device * ieee,struct rtl_80211_hdr_4addr * header)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
AddReorderEntry(struct rx_ts_record * pTS,struct rx_reorder_entry * pReorderEntry)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
indicate_packets(struct ieee80211_device * ieee,struct ieee80211_rxb * rxb)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
ieee80211_indicate_packets(struct ieee80211_device * ieee,struct ieee80211_rxb ** prxbIndicateArray,u8 index)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
RxReorderIndicatePacket(struct ieee80211_device * ieee,struct ieee80211_rxb * prxb,struct rx_ts_record * pTS,u16 SeqNum)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
parse_subframe(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats,struct ieee80211_rxb * rxb,u8 * src,u8 * dst)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 if (rx_stats->bContainHTC)
792 LLCOffset += HTCLNG;
793
794 // Null packet, don't indicate it to upper layer
795 ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
796
797 if (skb->len <= ChkLength)
798 return 0;
799
800 skb_pull(skb, LLCOffset);
801
802 if (!bIsAggregateFrame) {
803 rxb->nr_subframes = 1;
804 #ifdef JOHN_NOCPY
805 rxb->subframes[0] = skb;
806 #else
807 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
808 #endif
809
810 memcpy(rxb->src, src, ETH_ALEN);
811 memcpy(rxb->dst, dst, ETH_ALEN);
812 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
813 return 1;
814 } else {
815 rxb->nr_subframes = 0;
816 memcpy(rxb->src, src, ETH_ALEN);
817 memcpy(rxb->dst, dst, ETH_ALEN);
818 while (skb->len > ETHERNET_HEADER_SIZE) {
819 /* Offset 12 denote 2 mac address */
820 nSubframe_Length = *((u16 *)(skb->data + 12));
821 //==m==>change the length order
822 nSubframe_Length = (nSubframe_Length >> 8) + (nSubframe_Length << 8);
823
824 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
825 netdev_dbg(ieee->dev, "A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
826 rxb->nr_subframes);
827 netdev_dbg(ieee->dev, "A-MSDU parse error!! Subframe Length: %d\n", nSubframe_Length);
828 netdev_dbg(ieee->dev, "nRemain_Length is %d and nSubframe_Length is : %d\n", skb->len, nSubframe_Length);
829 netdev_dbg(ieee->dev, "The Packet SeqNum is %d\n", SeqNum);
830 return 0;
831 }
832
833 /* move the data point to data content */
834 skb_pull(skb, ETHERNET_HEADER_SIZE);
835
836 #ifdef JOHN_NOCPY
837 sub_skb = skb_clone(skb, GFP_ATOMIC);
838 sub_skb->len = nSubframe_Length;
839 sub_skb->tail = sub_skb->data + nSubframe_Length;
840 #else
841 /* Allocate new skb for releasing to upper layer */
842 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
843 if (!sub_skb)
844 return 0;
845 skb_reserve(sub_skb, 12);
846 skb_put_data(sub_skb, skb->data, nSubframe_Length);
847 #endif
848 rxb->subframes[rxb->nr_subframes++] = sub_skb;
849 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
850 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
851 break;
852 }
853 skb_pull(skb, nSubframe_Length);
854
855 if (skb->len != 0) {
856 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
857 if (nPadding_Length == 4)
858 nPadding_Length = 0;
859
860 if (skb->len < nPadding_Length)
861 return 0;
862
863 skb_pull(skb, nPadding_Length);
864 }
865 }
866 #ifdef JOHN_NOCPY
867 dev_kfree_skb(skb);
868 #endif
869 //{just for debug added by david
870 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
871 //}
872 return rxb->nr_subframes;
873 }
874 }
875
876 /* All received frames are sent to this function. @skb contains the frame in
877 * IEEE 802.11 format, i.e., in the format it was sent over air.
878 * This function is called only as a tasklet (software IRQ). */
ieee80211_rx(struct ieee80211_device * ieee,struct sk_buff * skb,struct ieee80211_rx_stats * rx_stats)879 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
880 struct ieee80211_rx_stats *rx_stats)
881 {
882 struct net_device *dev = ieee->dev;
883 struct rtl_80211_hdr_4addr *hdr;
884 //struct rtl_80211_hdr_3addrqos *hdr;
885
886 size_t hdrlen;
887 u16 fc, type, stype, sc;
888 struct net_device_stats *stats;
889 unsigned int frag;
890 //added by amy for reorder
891 u8 TID = 0;
892 u16 SeqNum = 0;
893 struct rx_ts_record *pTS = NULL;
894 //bool bIsAggregateFrame = false;
895 //added by amy for reorder
896 #ifdef NOT_YET
897 struct net_device *wds = NULL;
898 struct net_device *wds = NULL;
899 int from_assoc_ap = 0;
900 void *sta = NULL;
901 #endif
902 // u16 qos_ctl = 0;
903 u8 dst[ETH_ALEN];
904 u8 src[ETH_ALEN];
905 u8 bssid[ETH_ALEN];
906 struct ieee80211_crypt_data *crypt = NULL;
907 int keyidx = 0;
908
909 int i;
910 struct ieee80211_rxb *rxb = NULL;
911 // cheat the hdr type
912 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
913 stats = &ieee->stats;
914
915 if (skb->len < 10) {
916 netdev_info(dev, "SKB length < 10\n");
917 goto rx_dropped;
918 }
919
920 fc = le16_to_cpu(hdr->frame_ctl);
921 type = WLAN_FC_GET_TYPE(fc);
922 stype = WLAN_FC_GET_STYPE(fc);
923 sc = le16_to_cpu(hdr->seq_ctl);
924
925 frag = WLAN_GET_SEQ_FRAG(sc);
926 hdrlen = ieee80211_get_hdrlen(fc);
927
928 if (HTCCheck(ieee, skb->data)) {
929 if (net_ratelimit())
930 netdev_warn(dev, "find HTCControl\n");
931 hdrlen += 4;
932 rx_stats->bContainHTC = true;
933 }
934
935 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
936 #ifdef NOT_YET
937 /* Put this code here so that we avoid duplicating it in all
938 * Rx paths. - Jean II */
939 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
940 /* If spy monitoring on */
941 if (iface->spy_data.spy_number > 0) {
942 struct iw_quality wstats;
943 wstats.level = rx_stats->rssi;
944 wstats.noise = rx_stats->noise;
945 wstats.updated = 6; /* No qual value */
946 /* Update spy records */
947 wireless_spy_update(dev, hdr->addr2, &wstats);
948 }
949 #endif /* IW_WIRELESS_SPY */
950 hostap_update_rx_stats(local->ap, hdr, rx_stats);
951 #endif
952
953 if (ieee->iw_mode == IW_MODE_MONITOR) {
954 unsigned int len = skb->len;
955
956 ieee80211_monitor_rx(ieee, skb, rx_stats);
957 stats->rx_packets++;
958 stats->rx_bytes += len;
959 return 1;
960 }
961
962 if (ieee->host_decrypt) {
963 int idx = 0;
964 if (skb->len >= hdrlen + 3)
965 idx = skb->data[hdrlen + 3] >> 6;
966 crypt = ieee->crypt[idx];
967 #ifdef NOT_YET
968 sta = NULL;
969
970 /* Use station specific key to override default keys if the
971 * receiver address is a unicast address ("individual RA"). If
972 * bcrx_sta_key parameter is set, station specific key is used
973 * even with broad/multicast targets (this is against IEEE
974 * 802.11, but makes it easier to use different keys with
975 * stations that do not support WEP key mapping). */
976
977 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
978 (void)hostap_handle_sta_crypto(local, hdr, &crypt,
979 &sta);
980 #endif
981
982 /* allow NULL decrypt to indicate an station specific override
983 * for default encryption */
984 if (crypt && (!crypt->ops || !crypt->ops->decrypt_mpdu))
985 crypt = NULL;
986
987 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
988 /* This seems to be triggered by some (multicast?)
989 * frames from other than current BSS, so just drop the
990 * frames silently instead of filling system log with
991 * these reports. */
992 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
993 " (SA=%pM)\n",
994 hdr->addr2);
995 ieee->ieee_stats.rx_discards_undecryptable++;
996 goto rx_dropped;
997 }
998 }
999
1000 if (skb->len < IEEE80211_DATA_HDR3_LEN)
1001 goto rx_dropped;
1002
1003 // if QoS enabled, should check the sequence for each of the AC
1004 if ((!ieee->pHTInfo->bCurRxReorderEnable) || !ieee->current_network.qos_data.active || !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)) {
1005 if (is_duplicate_packet(ieee, hdr))
1006 goto rx_dropped;
1007
1008 } else {
1009 struct rx_ts_record *pRxTS = NULL;
1010 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid);
1011 if (GetTs(
1012 ieee,
1013 (struct ts_common_info **)&pRxTS,
1014 hdr->addr2,
1015 Frame_QoSTID((u8 *)(skb->data)),
1016 RX_DIR,
1017 true)) {
1018
1019 // 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));
1020 if ((fc & (1 << 11)) &&
1021 (frag == pRxTS->rx_last_frag_num) &&
1022 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->rx_last_seq_num)) {
1023 goto rx_dropped;
1024 } else {
1025 pRxTS->rx_last_frag_num = frag;
1026 pRxTS->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc);
1027 }
1028 } else {
1029 IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n", __func__);
1030 goto rx_dropped;
1031 }
1032 }
1033 if (type == IEEE80211_FTYPE_MGMT) {
1034
1035
1036 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1037 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1038 goto rx_dropped;
1039 else
1040 goto rx_exit;
1041 }
1042
1043 /* Data frame - extract src/dst addresses */
1044 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1045 case IEEE80211_FCTL_FROMDS:
1046 memcpy(dst, hdr->addr1, ETH_ALEN);
1047 memcpy(src, hdr->addr3, ETH_ALEN);
1048 memcpy(bssid, hdr->addr2, ETH_ALEN);
1049 break;
1050 case IEEE80211_FCTL_TODS:
1051 memcpy(dst, hdr->addr3, ETH_ALEN);
1052 memcpy(src, hdr->addr2, ETH_ALEN);
1053 memcpy(bssid, hdr->addr1, ETH_ALEN);
1054 break;
1055 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1056 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1057 goto rx_dropped;
1058 memcpy(dst, hdr->addr3, ETH_ALEN);
1059 memcpy(src, hdr->addr4, ETH_ALEN);
1060 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1061 break;
1062 default:
1063 memcpy(dst, hdr->addr1, ETH_ALEN);
1064 memcpy(src, hdr->addr2, ETH_ALEN);
1065 memcpy(bssid, hdr->addr3, ETH_ALEN);
1066 break;
1067 }
1068
1069 #ifdef NOT_YET
1070 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
1071 goto rx_dropped;
1072 if (wds) {
1073 skb->dev = dev = wds;
1074 stats = hostap_get_stats(dev);
1075 }
1076
1077 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1078 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
1079 ieee->stadev &&
1080 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
1081 /* Frame from BSSID of the AP for which we are a client */
1082 skb->dev = dev = ieee->stadev;
1083 stats = hostap_get_stats(dev);
1084 from_assoc_ap = 1;
1085 }
1086
1087 if ((ieee->iw_mode == IW_MODE_MASTER ||
1088 ieee->iw_mode == IW_MODE_REPEAT) &&
1089 !from_assoc_ap) {
1090 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
1091 wds)) {
1092 case AP_RX_CONTINUE_NOT_AUTHORIZED:
1093 case AP_RX_CONTINUE:
1094 break;
1095 case AP_RX_DROP:
1096 goto rx_dropped;
1097 case AP_RX_EXIT:
1098 goto rx_exit;
1099 }
1100 }
1101 #endif
1102 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1103 /* Nullfunc frames may have PS-bit set, so they must be passed to
1104 * hostap_handle_sta_rx() before being dropped here. */
1105 if (stype != IEEE80211_STYPE_DATA &&
1106 stype != IEEE80211_STYPE_DATA_CFACK &&
1107 stype != IEEE80211_STYPE_DATA_CFPOLL &&
1108 stype != IEEE80211_STYPE_DATA_CFACKPOLL &&
1109 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1110 ) {
1111 if (stype != IEEE80211_STYPE_NULLFUNC)
1112 IEEE80211_DEBUG_DROP(
1113 "RX: dropped data frame "
1114 "with no data (type=0x%02x, "
1115 "subtype=0x%02x, len=%d)\n",
1116 type, stype, skb->len);
1117 goto rx_dropped;
1118 }
1119 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1120 goto rx_dropped;
1121
1122 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1123
1124 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP)) {
1125 keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt);
1126 if (keyidx < 0) {
1127 netdev_dbg(ieee->dev, "decrypt frame error\n");
1128 goto rx_dropped;
1129 }
1130 }
1131
1132
1133 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1134
1135 /* skb: hdr + (possibly fragmented) plaintext payload */
1136 // PR: FIXME: hostap has additional conditions in the "if" below:
1137 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1138 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1139 int flen;
1140 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1141 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1142
1143 if (!frag_skb) {
1144 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1145 "Rx cannot get skb from fragment "
1146 "cache (morefrag=%d seq=%u frag=%u)\n",
1147 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1148 WLAN_GET_SEQ_SEQ(sc), frag);
1149 goto rx_dropped;
1150 }
1151 flen = skb->len;
1152 if (frag != 0)
1153 flen -= hdrlen;
1154
1155 if (frag_skb->tail + flen > frag_skb->end) {
1156 netdev_warn(dev, "host decrypted and "
1157 "reassembled frame did not fit skb\n");
1158 ieee80211_frag_cache_invalidate(ieee, hdr);
1159 goto rx_dropped;
1160 }
1161
1162 if (frag == 0) {
1163 /* copy first fragment (including full headers) into
1164 * beginning of the fragment cache skb */
1165 skb_put_data(frag_skb, skb->data, flen);
1166 } else {
1167 /* append frame payload to the end of the fragment
1168 * cache skb */
1169 skb_put_data(frag_skb, skb->data + hdrlen, flen);
1170 }
1171 dev_kfree_skb_any(skb);
1172 skb = NULL;
1173
1174 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1175 /* more fragments expected - leave the skb in fragment
1176 * cache for now; it will be delivered to upper layers
1177 * after all fragments have been received */
1178 goto rx_exit;
1179 }
1180
1181 /* this was the last fragment and the frame will be
1182 * delivered, so remove skb from fragment cache */
1183 skb = frag_skb;
1184 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1185 ieee80211_frag_cache_invalidate(ieee, hdr);
1186 }
1187
1188 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1189 * encrypted/authenticated */
1190 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1191 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1192 netdev_dbg(ieee->dev, "==>decrypt msdu error\n");
1193 goto rx_dropped;
1194 }
1195
1196 //added by amy for AP roaming
1197 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1198 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1199
1200 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1201 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1202 if (/*ieee->ieee802_1x &&*/
1203 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1204
1205 #ifdef CONFIG_IEEE80211_DEBUG
1206 /* pass unencrypted EAPOL frames even if encryption is
1207 * configured */
1208 struct eapol *eap = (struct eapol *)(skb->data +
1209 24);
1210 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1211 eap_get_type(eap->type));
1212 #endif
1213 } else {
1214 IEEE80211_DEBUG_DROP(
1215 "encryption configured, but RX "
1216 "frame not encrypted (SA=%pM)\n",
1217 hdr->addr2);
1218 goto rx_dropped;
1219 }
1220 }
1221
1222 #ifdef CONFIG_IEEE80211_DEBUG
1223 if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1224 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1225 struct eapol *eap = (struct eapol *)(skb->data +
1226 24);
1227 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1228 eap_get_type(eap->type));
1229 }
1230 #endif
1231
1232 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1233 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1234 IEEE80211_DEBUG_DROP(
1235 "dropped unencrypted RX data "
1236 "frame from %pM"
1237 " (drop_unencrypted=1)\n",
1238 hdr->addr2);
1239 goto rx_dropped;
1240 }
1241 /*
1242 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1243 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1244 }
1245 */
1246 //added by amy for reorder
1247 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1248 && !is_multicast_ether_addr(hdr->addr1)) {
1249 TID = Frame_QoSTID(skb->data);
1250 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1251 GetTs(ieee, (struct ts_common_info **)&pTS, hdr->addr2, TID, RX_DIR, true);
1252 if (TID != 0 && TID != 3)
1253 ieee->bis_any_nonbepkts = true;
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 */
ieee80211_verify_qos_info(struct ieee80211_qos_information_element * info_element,int sub_type)1314 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1315 *info_element, int sub_type)
1316 {
1317 if (info_element->elementID != QOS_ELEMENT_ID)
1318 return -1;
1319 if (info_element->qui_subtype != sub_type)
1320 return -1;
1321 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1322 return -1;
1323 if (info_element->qui_type != QOS_OUI_TYPE)
1324 return -1;
1325 if (info_element->version != QOS_VERSION_1)
1326 return -1;
1327
1328 return 0;
1329 }
1330
1331
1332 /*
1333 * Parse a QoS parameter element
1334 */
ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info * element_param,struct ieee80211_info_element * info_element)1335 static int ieee80211_read_qos_param_element(
1336 struct ieee80211_qos_parameter_info *element_param,
1337 struct ieee80211_info_element *info_element)
1338 {
1339 size_t size = sizeof(*element_param);
1340
1341 if (!element_param || !info_element || info_element->len != size - 2)
1342 return -1;
1343
1344 memcpy(element_param, info_element, size);
1345 return ieee80211_verify_qos_info(&element_param->info_element,
1346 QOS_OUI_PARAM_SUB_TYPE);
1347 }
1348
1349 /*
1350 * Parse a QoS information element
1351 */
ieee80211_read_qos_info_element(struct ieee80211_qos_information_element * element_info,struct ieee80211_info_element * info_element)1352 static int ieee80211_read_qos_info_element(
1353 struct ieee80211_qos_information_element *element_info,
1354 struct ieee80211_info_element *info_element)
1355 {
1356 size_t size = sizeof(*element_info);
1357
1358 if (!element_info || !info_element || info_element->len != size - 2)
1359 return -1;
1360
1361 memcpy(element_info, info_element, size);
1362 return ieee80211_verify_qos_info(element_info, QOS_OUI_INFO_SUB_TYPE);
1363 }
1364
1365
1366 /*
1367 * Write QoS parameters from the ac parameters.
1368 */
ieee80211_qos_convert_ac_to_parameters(struct ieee80211_qos_parameter_info * param_elm,struct ieee80211_qos_parameters * qos_param)1369 static int ieee80211_qos_convert_ac_to_parameters(
1370 struct ieee80211_qos_parameter_info *param_elm,
1371 struct ieee80211_qos_parameters *qos_param)
1372 {
1373 int i;
1374 struct ieee80211_qos_ac_parameter *ac_params;
1375 u8 aci;
1376 //u8 cw_min;
1377 //u8 cw_max;
1378
1379 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1380 ac_params = &(param_elm->ac_params_record[i]);
1381
1382 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1383
1384 if (aci >= QOS_QUEUE_NUM)
1385 continue;
1386 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1387
1388 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1389 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1390
1391 qos_param->cw_min[aci] =
1392 cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1393
1394 qos_param->cw_max[aci] =
1395 cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1396
1397 qos_param->flag[aci] =
1398 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1399 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1400 }
1401 return 0;
1402 }
1403
1404 /*
1405 * we have a generic data element which it may contain QoS information or
1406 * parameters element. check the information element length to decide
1407 * which type to read
1408 */
ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element * info_element,struct ieee80211_network * network)1409 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1410 *info_element,
1411 struct ieee80211_network *network)
1412 {
1413 int rc = 0;
1414 struct ieee80211_qos_parameters *qos_param = NULL;
1415 struct ieee80211_qos_information_element qos_info_element;
1416
1417 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1418
1419 if (rc == 0) {
1420 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1421 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1422 } else {
1423 struct ieee80211_qos_parameter_info param_element;
1424
1425 rc = ieee80211_read_qos_param_element(¶m_element,
1426 info_element);
1427 if (rc == 0) {
1428 qos_param = &(network->qos_data.parameters);
1429 ieee80211_qos_convert_ac_to_parameters(¶m_element,
1430 qos_param);
1431 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1432 network->qos_data.param_count =
1433 param_element.info_element.ac_info & 0x0F;
1434 }
1435 }
1436
1437 if (rc == 0) {
1438 IEEE80211_DEBUG_QOS("QoS is supported\n");
1439 network->qos_data.supported = 1;
1440 }
1441 return rc;
1442 }
1443
1444 #ifdef CONFIG_IEEE80211_DEBUG
1445 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1446
get_info_element_string(u16 id)1447 static const char *get_info_element_string(u16 id)
1448 {
1449 switch (id) {
1450 MFIE_STRING(SSID);
1451 MFIE_STRING(RATES);
1452 MFIE_STRING(FH_SET);
1453 MFIE_STRING(DS_SET);
1454 MFIE_STRING(CF_SET);
1455 MFIE_STRING(TIM);
1456 MFIE_STRING(IBSS_SET);
1457 MFIE_STRING(COUNTRY);
1458 MFIE_STRING(HOP_PARAMS);
1459 MFIE_STRING(HOP_TABLE);
1460 MFIE_STRING(REQUEST);
1461 MFIE_STRING(CHALLENGE);
1462 MFIE_STRING(POWER_CONSTRAINT);
1463 MFIE_STRING(POWER_CAPABILITY);
1464 MFIE_STRING(TPC_REQUEST);
1465 MFIE_STRING(TPC_REPORT);
1466 MFIE_STRING(SUPP_CHANNELS);
1467 MFIE_STRING(CSA);
1468 MFIE_STRING(MEASURE_REQUEST);
1469 MFIE_STRING(MEASURE_REPORT);
1470 MFIE_STRING(QUIET);
1471 MFIE_STRING(IBSS_DFS);
1472 // MFIE_STRING(ERP_INFO);
1473 MFIE_STRING(RSN);
1474 MFIE_STRING(RATES_EX);
1475 MFIE_STRING(GENERIC);
1476 MFIE_STRING(QOS_PARAMETER);
1477 default:
1478 return "UNKNOWN";
1479 }
1480 }
1481 #endif
1482
ieee80211_extract_country_ie(struct ieee80211_device * ieee,struct ieee80211_info_element * info_element,struct ieee80211_network * network,u8 * addr2)1483 static inline void ieee80211_extract_country_ie(
1484 struct ieee80211_device *ieee,
1485 struct ieee80211_info_element *info_element,
1486 struct ieee80211_network *network,
1487 u8 *addr2
1488 )
1489 {
1490 if (IS_DOT11D_ENABLE(ieee)) {
1491 if (info_element->len != 0) {
1492 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1493 network->CountryIeLen = info_element->len;
1494
1495 if (!IS_COUNTRY_IE_VALID(ieee)) {
1496 dot11d_update_country_ie(ieee, addr2, info_element->len, info_element->data);
1497 }
1498 }
1499
1500 //
1501 // 070305, rcnjko: I update country IE watch dog here because
1502 // some AP (e.g. Cisco 1242) don't include country IE in their
1503 // probe response frame.
1504 //
1505 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1506 UPDATE_CIE_WATCHDOG(ieee);
1507 }
1508 }
1509
ieee80211_parse_info_param(struct ieee80211_device * ieee,struct ieee80211_info_element * info_element,u16 length,struct ieee80211_network * network,struct ieee80211_rx_stats * stats)1510 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1511 struct ieee80211_info_element *info_element,
1512 u16 length,
1513 struct ieee80211_network *network,
1514 struct ieee80211_rx_stats *stats)
1515 {
1516 u8 i;
1517 short offset;
1518 u16 tmp_htcap_len = 0;
1519 u16 tmp_htinfo_len = 0;
1520 u16 ht_realtek_agg_len = 0;
1521 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1522 // u16 broadcom_len = 0;
1523 #ifdef CONFIG_IEEE80211_DEBUG
1524 char rates_str[64];
1525 char *p;
1526 #endif
1527
1528 while (length >= sizeof(*info_element)) {
1529 if (sizeof(*info_element) + info_element->len > length) {
1530 IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1531 "info_element->len + 2 > left : "
1532 "info_element->len+2=%zd left=%d, id=%d.\n",
1533 info_element->len +
1534 sizeof(*info_element),
1535 length, info_element->id);
1536 /* We stop processing but don't return an error here
1537 * because some misbehaviour APs break this rule. ie.
1538 * Orinoco AP1000. */
1539 break;
1540 }
1541
1542 switch (info_element->id) {
1543 case MFIE_TYPE_SSID:
1544 if (ieee80211_is_empty_essid(info_element->data,
1545 info_element->len)) {
1546 network->flags |= NETWORK_EMPTY_ESSID;
1547 break;
1548 }
1549
1550 network->ssid_len = min(info_element->len,
1551 (u8)IW_ESSID_MAX_SIZE);
1552 memcpy(network->ssid, info_element->data, network->ssid_len);
1553 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1554 memset(network->ssid + network->ssid_len, 0,
1555 IW_ESSID_MAX_SIZE - network->ssid_len);
1556
1557 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1558 network->ssid, network->ssid_len);
1559 break;
1560
1561 case MFIE_TYPE_RATES:
1562 #ifdef CONFIG_IEEE80211_DEBUG
1563 p = rates_str;
1564 #endif
1565 network->rates_len = min(info_element->len,
1566 MAX_RATES_LENGTH);
1567 for (i = 0; i < network->rates_len; i++) {
1568 network->rates[i] = info_element->data[i];
1569 #ifdef CONFIG_IEEE80211_DEBUG
1570 p += scnprintf(p, sizeof(rates_str) -
1571 (p - rates_str), "%02X ",
1572 network->rates[i]);
1573 #endif
1574 if (ieee80211_is_ofdm_rate
1575 (info_element->data[i])) {
1576 network->flags |= NETWORK_HAS_OFDM;
1577 if (info_element->data[i] &
1578 IEEE80211_BASIC_RATE_MASK)
1579 network->flags &=
1580 ~NETWORK_HAS_CCK;
1581 }
1582 }
1583
1584 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1585 rates_str, network->rates_len);
1586 break;
1587
1588 case MFIE_TYPE_RATES_EX:
1589 #ifdef CONFIG_IEEE80211_DEBUG
1590 p = rates_str;
1591 #endif
1592 network->rates_ex_len = min(info_element->len,
1593 MAX_RATES_EX_LENGTH);
1594 for (i = 0; i < network->rates_ex_len; i++) {
1595 network->rates_ex[i] = info_element->data[i];
1596 #ifdef CONFIG_IEEE80211_DEBUG
1597 p += scnprintf(p, sizeof(rates_str) -
1598 (p - rates_str), "%02X ",
1599 network->rates_ex[i]);
1600 #endif
1601 if (ieee80211_is_ofdm_rate
1602 (info_element->data[i])) {
1603 network->flags |= NETWORK_HAS_OFDM;
1604 if (info_element->data[i] &
1605 IEEE80211_BASIC_RATE_MASK)
1606 network->flags &=
1607 ~NETWORK_HAS_CCK;
1608 }
1609 }
1610
1611 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1612 rates_str, network->rates_ex_len);
1613 break;
1614
1615 case MFIE_TYPE_DS_SET:
1616 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1617 info_element->data[0]);
1618 network->channel = info_element->data[0];
1619 break;
1620
1621 case MFIE_TYPE_FH_SET:
1622 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1623 break;
1624
1625 case MFIE_TYPE_CF_SET:
1626 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1627 break;
1628
1629 case MFIE_TYPE_TIM:
1630 if (info_element->len < 4)
1631 break;
1632
1633 network->tim.tim_count = info_element->data[0];
1634 network->tim.tim_period = info_element->data[1];
1635
1636 network->dtim_period = info_element->data[1];
1637 if (ieee->state != IEEE80211_LINKED)
1638 break;
1639
1640 network->last_dtim_sta_time[0] = stats->mac_time[0];
1641 network->last_dtim_sta_time[1] = stats->mac_time[1];
1642
1643 network->dtim_data = IEEE80211_DTIM_VALID;
1644
1645 if (info_element->data[0] != 0)
1646 break;
1647
1648 if (info_element->data[2] & 1)
1649 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1650
1651 offset = (info_element->data[2] >> 1) * 2;
1652
1653 if (ieee->assoc_id < 8 * offset ||
1654 ieee->assoc_id > 8 * (offset + info_element->len - 3))
1655
1656 break;
1657
1658 offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1659
1660 if (info_element->data[3 + offset] & (1 << (ieee->assoc_id % 8)))
1661 network->dtim_data |= IEEE80211_DTIM_UCAST;
1662
1663 //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1664 break;
1665
1666 case MFIE_TYPE_ERP:
1667 network->erp_value = info_element->data[0];
1668 network->flags |= NETWORK_HAS_ERP_VALUE;
1669 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1670 network->erp_value);
1671 break;
1672 case MFIE_TYPE_IBSS_SET:
1673 network->atim_window = info_element->data[0];
1674 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1675 network->atim_window);
1676 break;
1677
1678 case MFIE_TYPE_CHALLENGE:
1679 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1680 break;
1681
1682 case MFIE_TYPE_GENERIC:
1683 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1684 info_element->len);
1685 if (!ieee80211_parse_qos_info_param_IE(info_element,
1686 network))
1687 break;
1688
1689 if (info_element->len >= 4 &&
1690 info_element->data[0] == 0x00 &&
1691 info_element->data[1] == 0x50 &&
1692 info_element->data[2] == 0xf2 &&
1693 info_element->data[3] == 0x01) {
1694 network->wpa_ie_len = min(info_element->len + 2,
1695 MAX_WPA_IE_LEN);
1696 memcpy(network->wpa_ie, info_element,
1697 network->wpa_ie_len);
1698 break;
1699 }
1700
1701 #ifdef THOMAS_TURBO
1702 if (info_element->len == 7 &&
1703 info_element->data[0] == 0x00 &&
1704 info_element->data[1] == 0xe0 &&
1705 info_element->data[2] == 0x4c &&
1706 info_element->data[3] == 0x01 &&
1707 info_element->data[4] == 0x02) {
1708 network->Turbo_Enable = 1;
1709 }
1710 #endif
1711
1712 //for HTcap and HTinfo parameters
1713 if (tmp_htcap_len == 0) {
1714 if (info_element->len >= 4 &&
1715 info_element->data[0] == 0x00 &&
1716 info_element->data[1] == 0x90 &&
1717 info_element->data[2] == 0x4c &&
1718 info_element->data[3] == 0x033){
1719
1720 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1721 if (tmp_htcap_len != 0) {
1722 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1723 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
1724 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1725 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1726 }
1727 }
1728 if (tmp_htcap_len != 0)
1729 network->bssht.bdSupportHT = true;
1730 else
1731 network->bssht.bdSupportHT = false;
1732 }
1733
1734
1735 if (tmp_htinfo_len == 0) {
1736 if (info_element->len >= 4 &&
1737 info_element->data[0] == 0x00 &&
1738 info_element->data[1] == 0x90 &&
1739 info_element->data[2] == 0x4c &&
1740 info_element->data[3] == 0x034){
1741
1742 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1743 if (tmp_htinfo_len != 0) {
1744 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1745 if (tmp_htinfo_len) {
1746 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
1747 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1748 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1749 }
1750
1751 }
1752
1753 }
1754 }
1755
1756 if (ieee->aggregation) {
1757 if (network->bssht.bdSupportHT) {
1758 if (info_element->len >= 4 &&
1759 info_element->data[0] == 0x00 &&
1760 info_element->data[1] == 0xe0 &&
1761 info_element->data[2] == 0x4c &&
1762 info_element->data[3] == 0x02){
1763
1764 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
1765 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1766
1767 }
1768 if (ht_realtek_agg_len >= 5) {
1769 network->bssht.bdRT2RTAggregation = true;
1770
1771 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1772 network->bssht.bdRT2RTLongSlotTime = true;
1773 }
1774 }
1775
1776 }
1777
1778 //if(tmp_htcap_len !=0 || tmp_htinfo_len != 0)
1779 {
1780 if ((info_element->len >= 3 &&
1781 info_element->data[0] == 0x00 &&
1782 info_element->data[1] == 0x05 &&
1783 info_element->data[2] == 0xb5) ||
1784 (info_element->len >= 3 &&
1785 info_element->data[0] == 0x00 &&
1786 info_element->data[1] == 0x0a &&
1787 info_element->data[2] == 0xf7) ||
1788 (info_element->len >= 3 &&
1789 info_element->data[0] == 0x00 &&
1790 info_element->data[1] == 0x10 &&
1791 info_element->data[2] == 0x18)){
1792
1793 network->broadcom_cap_exist = true;
1794
1795 }
1796 }
1797 if (info_element->len >= 3 &&
1798 info_element->data[0] == 0x00 &&
1799 info_element->data[1] == 0x0c &&
1800 info_element->data[2] == 0x43) {
1801 network->ralink_cap_exist = true;
1802 } else
1803 network->ralink_cap_exist = false;
1804 //added by amy for atheros AP
1805 if ((info_element->len >= 3 &&
1806 info_element->data[0] == 0x00 &&
1807 info_element->data[1] == 0x03 &&
1808 info_element->data[2] == 0x7f) ||
1809 (info_element->len >= 3 &&
1810 info_element->data[0] == 0x00 &&
1811 info_element->data[1] == 0x13 &&
1812 info_element->data[2] == 0x74)) {
1813 netdev_dbg(ieee->dev, "========> Atheros AP exists\n");
1814 network->atheros_cap_exist = true;
1815 } else
1816 network->atheros_cap_exist = false;
1817
1818 if (info_element->len >= 3 &&
1819 info_element->data[0] == 0x00 &&
1820 info_element->data[1] == 0x40 &&
1821 info_element->data[2] == 0x96) {
1822 network->cisco_cap_exist = true;
1823 } else
1824 network->cisco_cap_exist = false;
1825 //added by amy for LEAP of cisco
1826 if (info_element->len > 4 &&
1827 info_element->data[0] == 0x00 &&
1828 info_element->data[1] == 0x40 &&
1829 info_element->data[2] == 0x96 &&
1830 info_element->data[3] == 0x01) {
1831 if (info_element->len == 6) {
1832 memcpy(network->CcxRmState, &info_element[4], 2);
1833 if (network->CcxRmState[0] != 0)
1834 network->bCcxRmEnable = true;
1835 else
1836 network->bCcxRmEnable = false;
1837 //
1838 // CCXv4 Table 59-1 MBSSID Masks.
1839 //
1840 network->MBssidMask = network->CcxRmState[1] & 0x07;
1841 if (network->MBssidMask != 0) {
1842 network->bMBssidValid = true;
1843 network->MBssidMask = 0xff << (network->MBssidMask);
1844 ether_addr_copy(network->MBssid, network->bssid);
1845 network->MBssid[5] &= network->MBssidMask;
1846 } else {
1847 network->bMBssidValid = false;
1848 }
1849 } else {
1850 network->bCcxRmEnable = false;
1851 }
1852 }
1853 if (info_element->len > 4 &&
1854 info_element->data[0] == 0x00 &&
1855 info_element->data[1] == 0x40 &&
1856 info_element->data[2] == 0x96 &&
1857 info_element->data[3] == 0x03) {
1858 if (info_element->len == 5) {
1859 network->bWithCcxVerNum = true;
1860 network->BssCcxVerNumber = info_element->data[4];
1861 } else {
1862 network->bWithCcxVerNum = false;
1863 network->BssCcxVerNumber = 0;
1864 }
1865 }
1866 break;
1867
1868 case MFIE_TYPE_RSN:
1869 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1870 info_element->len);
1871 network->rsn_ie_len = min(info_element->len + 2,
1872 MAX_WPA_IE_LEN);
1873 memcpy(network->rsn_ie, info_element,
1874 network->rsn_ie_len);
1875 break;
1876
1877 //HT related element.
1878 case MFIE_TYPE_HT_CAP:
1879 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
1880 info_element->len);
1881 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1882 if (tmp_htcap_len != 0) {
1883 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1884 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
1885 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1886 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1887
1888 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
1889 // windows driver will update WMM parameters each beacon received once connected
1890 // Linux driver is a bit different.
1891 network->bssht.bdSupportHT = true;
1892 } else
1893 network->bssht.bdSupportHT = false;
1894 break;
1895
1896
1897 case MFIE_TYPE_HT_INFO:
1898 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
1899 info_element->len);
1900 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1901 if (tmp_htinfo_len) {
1902 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
1903 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
1904 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1905 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1906 }
1907 break;
1908
1909 case MFIE_TYPE_AIRONET:
1910 IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
1911 info_element->len);
1912 if (info_element->len > IE_CISCO_FLAG_POSITION) {
1913 network->bWithAironetIE = true;
1914
1915 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
1916 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
1917 // by adding an Aironet element and setting one or both of the CKIP negotiation bits."
1918 if ((info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_MIC) ||
1919 (info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_PK)) {
1920 network->bCkipSupported = true;
1921 } else {
1922 network->bCkipSupported = false;
1923 }
1924 } else {
1925 network->bWithAironetIE = false;
1926 network->bCkipSupported = false;
1927 }
1928 break;
1929 case MFIE_TYPE_QOS_PARAMETER:
1930 netdev_err(ieee->dev,
1931 "QoS Error need to parse QOS_PARAMETER IE\n");
1932 break;
1933
1934 case MFIE_TYPE_COUNTRY:
1935 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
1936 info_element->len);
1937 ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
1938 break;
1939 /* TODO */
1940 default:
1941 IEEE80211_DEBUG_MGMT
1942 ("Unsupported info element: %s (%d)\n",
1943 get_info_element_string(info_element->id),
1944 info_element->id);
1945 break;
1946 }
1947
1948 length -= sizeof(*info_element) + info_element->len;
1949 info_element =
1950 (struct ieee80211_info_element *)&info_element->
1951 data[info_element->len];
1952 }
1953
1954 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
1955 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) {
1956 network->unknown_cap_exist = true;
1957 } else {
1958 network->unknown_cap_exist = false;
1959 }
1960 return 0;
1961 }
1962
1963 /* 0-100 index */
ieee80211_translate_todbm(u8 signal_strength_index)1964 static long ieee80211_translate_todbm(u8 signal_strength_index)
1965 {
1966 long signal_power; // in dBm.
1967
1968 // Translate to dBm (x=0.5y-95).
1969 signal_power = (long)((signal_strength_index + 1) >> 1);
1970 signal_power -= 95;
1971
1972 return signal_power;
1973 }
1974
ieee80211_network_init(struct ieee80211_device * ieee,struct ieee80211_probe_response * beacon,struct ieee80211_network * network,struct ieee80211_rx_stats * stats)1975 static inline int ieee80211_network_init(
1976 struct ieee80211_device *ieee,
1977 struct ieee80211_probe_response *beacon,
1978 struct ieee80211_network *network,
1979 struct ieee80211_rx_stats *stats)
1980 {
1981 #ifdef CONFIG_IEEE80211_DEBUG
1982 //char rates_str[64];
1983 //char *p;
1984 #endif
1985
1986 network->qos_data.active = 0;
1987 network->qos_data.supported = 0;
1988 network->qos_data.param_count = 0;
1989 network->qos_data.old_param_count = 0;
1990
1991 /* Pull out fixed field data */
1992 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1993 network->capability = le16_to_cpu(beacon->capability);
1994 network->last_scanned = jiffies;
1995 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1996 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1997 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1998 /* Where to pull this? beacon->listen_interval;*/
1999 network->listen_interval = 0x0A;
2000 network->rates_len = network->rates_ex_len = 0;
2001 network->last_associate = 0;
2002 network->ssid_len = 0;
2003 network->flags = 0;
2004 network->atim_window = 0;
2005 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2006 0x3 : 0x0;
2007 network->berp_info_valid = false;
2008 network->broadcom_cap_exist = false;
2009 network->ralink_cap_exist = false;
2010 network->atheros_cap_exist = false;
2011 network->cisco_cap_exist = false;
2012 network->unknown_cap_exist = false;
2013 #ifdef THOMAS_TURBO
2014 network->Turbo_Enable = 0;
2015 #endif
2016 network->CountryIeLen = 0;
2017 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2018 //Initialize HT parameters
2019 //ieee80211_ht_initialize(&network->bssht);
2020 HTInitializeBssDesc(&network->bssht);
2021 if (stats->freq == IEEE80211_52GHZ_BAND) {
2022 /* for A band (No DS info) */
2023 network->channel = stats->received_channel;
2024 } else
2025 network->flags |= NETWORK_HAS_CCK;
2026
2027 network->wpa_ie_len = 0;
2028 network->rsn_ie_len = 0;
2029
2030 if (ieee80211_parse_info_param
2031 (ieee, beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2032 return 1;
2033
2034 network->mode = 0;
2035 if (stats->freq == IEEE80211_52GHZ_BAND)
2036 network->mode = IEEE_A;
2037 else {
2038 if (network->flags & NETWORK_HAS_OFDM)
2039 network->mode |= IEEE_G;
2040 if (network->flags & NETWORK_HAS_CCK)
2041 network->mode |= IEEE_B;
2042 }
2043
2044 if (network->mode == 0) {
2045 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
2046 "network.\n",
2047 escape_essid(network->ssid,
2048 network->ssid_len),
2049 network->bssid);
2050 return 1;
2051 }
2052
2053 if (network->bssht.bdSupportHT) {
2054 if (network->mode == IEEE_A)
2055 network->mode = IEEE_N_5G;
2056 else if (network->mode & (IEEE_G | IEEE_B))
2057 network->mode = IEEE_N_24G;
2058 }
2059 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2060 network->flags |= NETWORK_EMPTY_ESSID;
2061
2062 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2063 stats->noise = ieee80211_translate_todbm((u8)(100 - stats->signal)) - 25;
2064
2065 memcpy(&network->stats, stats, sizeof(network->stats));
2066
2067 return 0;
2068 }
2069
is_same_network(struct ieee80211_network * src,struct ieee80211_network * dst,struct ieee80211_device * ieee)2070 static inline int is_same_network(struct ieee80211_network *src,
2071 struct ieee80211_network *dst, struct ieee80211_device *ieee)
2072 {
2073 /* A network is only a duplicate if the channel, BSSID, ESSID
2074 * and the capability field (in particular IBSS and BSS) all match.
2075 * We treat all <hidden> with the same BSSID and channel
2076 * as one network */
2077 return //((src->ssid_len == dst->ssid_len) &&
2078 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2079 (src->channel == dst->channel) &&
2080 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2081 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2082 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2083 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2084 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2085 ((src->capability & WLAN_CAPABILITY_BSS) ==
2086 (dst->capability & WLAN_CAPABILITY_BSS)));
2087 }
2088
update_network(struct ieee80211_network * dst,struct ieee80211_network * src)2089 static inline void update_network(struct ieee80211_network *dst,
2090 struct ieee80211_network *src)
2091 {
2092 int qos_active;
2093 u8 old_param;
2094
2095 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2096 dst->capability = src->capability;
2097 memcpy(dst->rates, src->rates, src->rates_len);
2098 dst->rates_len = src->rates_len;
2099 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2100 dst->rates_ex_len = src->rates_ex_len;
2101 if (src->ssid_len > 0) {
2102 memset(dst->ssid, 0, dst->ssid_len);
2103 dst->ssid_len = src->ssid_len;
2104 memcpy(dst->ssid, src->ssid, src->ssid_len);
2105 }
2106 dst->mode = src->mode;
2107 dst->flags = src->flags;
2108 dst->time_stamp[0] = src->time_stamp[0];
2109 dst->time_stamp[1] = src->time_stamp[1];
2110 if (src->flags & NETWORK_HAS_ERP_VALUE) {
2111 dst->erp_value = src->erp_value;
2112 dst->berp_info_valid = src->berp_info_valid = true;
2113 }
2114 dst->beacon_interval = src->beacon_interval;
2115 dst->listen_interval = src->listen_interval;
2116 dst->atim_window = src->atim_window;
2117 dst->dtim_period = src->dtim_period;
2118 dst->dtim_data = src->dtim_data;
2119 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2120 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2121 memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2122
2123 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2124 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2125 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2126 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, src->bssht.bdHTCapLen);
2127 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2128 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, src->bssht.bdHTInfoLen);
2129 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2130 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2131 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2132 dst->ralink_cap_exist = src->ralink_cap_exist;
2133 dst->atheros_cap_exist = src->atheros_cap_exist;
2134 dst->cisco_cap_exist = src->cisco_cap_exist;
2135 dst->unknown_cap_exist = src->unknown_cap_exist;
2136 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2137 dst->wpa_ie_len = src->wpa_ie_len;
2138 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2139 dst->rsn_ie_len = src->rsn_ie_len;
2140
2141 dst->last_scanned = jiffies;
2142 /* qos related parameters */
2143 //qos_active = src->qos_data.active;
2144 qos_active = dst->qos_data.active;
2145 //old_param = dst->qos_data.old_param_count;
2146 old_param = dst->qos_data.param_count;
2147 if (dst->flags & NETWORK_HAS_QOS_MASK)
2148 memcpy(&dst->qos_data, &src->qos_data,
2149 sizeof(struct ieee80211_qos_data));
2150 else {
2151 dst->qos_data.supported = src->qos_data.supported;
2152 dst->qos_data.param_count = src->qos_data.param_count;
2153 }
2154
2155 if (dst->qos_data.supported == 1) {
2156 dst->QoS_Enable = 1;
2157 if (dst->ssid_len)
2158 IEEE80211_DEBUG_QOS
2159 ("QoS the network %s is QoS supported\n",
2160 dst->ssid);
2161 else
2162 IEEE80211_DEBUG_QOS
2163 ("QoS the network is QoS supported\n");
2164 }
2165 dst->qos_data.active = qos_active;
2166 dst->qos_data.old_param_count = old_param;
2167
2168 /* dst->last_associate is not overwritten */
2169 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2170 if (src->wmm_param[0].aci_aifsn || \
2171 src->wmm_param[1].aci_aifsn || \
2172 src->wmm_param[2].aci_aifsn || \
2173 src->wmm_param[3].aci_aifsn) {
2174 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2175 }
2176 //dst->QoS_Enable = src->QoS_Enable;
2177 #ifdef THOMAS_TURBO
2178 dst->Turbo_Enable = src->Turbo_Enable;
2179 #endif
2180
2181 dst->CountryIeLen = src->CountryIeLen;
2182 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2183
2184 //added by amy for LEAP
2185 dst->bWithAironetIE = src->bWithAironetIE;
2186 dst->bCkipSupported = src->bCkipSupported;
2187 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2188 dst->bCcxRmEnable = src->bCcxRmEnable;
2189 dst->MBssidMask = src->MBssidMask;
2190 dst->bMBssidValid = src->bMBssidValid;
2191 memcpy(dst->MBssid, src->MBssid, 6);
2192 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2193 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2194
2195 }
2196
is_beacon(__le16 fc)2197 static inline int is_beacon(__le16 fc)
2198 {
2199 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2200 }
2201
ieee80211_process_probe_response(struct ieee80211_device * ieee,struct ieee80211_probe_response * beacon,struct ieee80211_rx_stats * stats)2202 static inline void ieee80211_process_probe_response(
2203 struct ieee80211_device *ieee,
2204 struct ieee80211_probe_response *beacon,
2205 struct ieee80211_rx_stats *stats)
2206 {
2207 struct ieee80211_network *network;
2208 struct ieee80211_network *target;
2209 struct ieee80211_network *oldest = NULL;
2210 #ifdef CONFIG_IEEE80211_DEBUG
2211 struct ieee80211_info_element *info_element = &beacon->info_element[0];
2212 #endif
2213 int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl));
2214 unsigned long flags;
2215 short renew;
2216 u16 capability;
2217 //u8 wmm_info;
2218
2219 network = kzalloc(sizeof(*network), GFP_ATOMIC);
2220 if (!network)
2221 goto out;
2222
2223 capability = le16_to_cpu(beacon->capability);
2224 IEEE80211_DEBUG_SCAN(
2225 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2226 escape_essid(info_element->data, info_element->len),
2227 beacon->header.addr3,
2228 (capability & BIT(0xf)) ? '1' : '0',
2229 (capability & BIT(0xe)) ? '1' : '0',
2230 (capability & BIT(0xd)) ? '1' : '0',
2231 (capability & BIT(0xc)) ? '1' : '0',
2232 (capability & BIT(0xb)) ? '1' : '0',
2233 (capability & BIT(0xa)) ? '1' : '0',
2234 (capability & BIT(0x9)) ? '1' : '0',
2235 (capability & BIT(0x8)) ? '1' : '0',
2236 (capability & BIT(0x7)) ? '1' : '0',
2237 (capability & BIT(0x6)) ? '1' : '0',
2238 (capability & BIT(0x5)) ? '1' : '0',
2239 (capability & BIT(0x4)) ? '1' : '0',
2240 (capability & BIT(0x3)) ? '1' : '0',
2241 (capability & BIT(0x2)) ? '1' : '0',
2242 (capability & BIT(0x1)) ? '1' : '0',
2243 (capability & BIT(0x0)) ? '1' : '0');
2244
2245 if (ieee80211_network_init(ieee, beacon, network, stats)) {
2246 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
2247 escape_essid(info_element->data,
2248 info_element->len),
2249 beacon->header.addr3,
2250 fc == IEEE80211_STYPE_PROBE_RESP ?
2251 "PROBE RESPONSE" : "BEACON");
2252 goto out;
2253 }
2254
2255 // For Asus EeePc request,
2256 // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2257 // wireless adapter should follow the country code.
2258 // (2) If there is no any country code in beacon,
2259 // then wireless adapter should do active scan from ch1~11 and
2260 // passive scan from ch12~14
2261
2262 if (!is_legal_channel(ieee, network->channel))
2263 goto out;
2264 if (ieee->bGlobalDomain) {
2265 if (fc == IEEE80211_STYPE_PROBE_RESP) {
2266 if (IS_COUNTRY_IE_VALID(ieee)) {
2267 // Case 1: Country code
2268 if (!is_legal_channel(ieee, network->channel)) {
2269 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel);
2270 goto out;
2271 }
2272 } else {
2273 // Case 2: No any country code.
2274 // Filter over channel ch12~14
2275 if (network->channel > 11) {
2276 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel);
2277 goto out;
2278 }
2279 }
2280 } else {
2281 if (IS_COUNTRY_IE_VALID(ieee)) {
2282 // Case 1: Country code
2283 if (!is_legal_channel(ieee, network->channel)) {
2284 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network->channel);
2285 goto out;
2286 }
2287 } else {
2288 // Case 2: No any country code.
2289 // Filter over channel ch12~14
2290 if (network->channel > 14) {
2291 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network->channel);
2292 goto out;
2293 }
2294 }
2295 }
2296 }
2297
2298 /* The network parsed correctly -- so now we scan our known networks
2299 * to see if we can find it in our list.
2300 *
2301 * NOTE: This search is definitely not optimized. Once its doing
2302 * the "right thing" we'll optimize it for efficiency if
2303 * necessary */
2304
2305 /* Search for this entry in the list and update it if it is
2306 * already there. */
2307
2308 spin_lock_irqsave(&ieee->lock, flags);
2309
2310 if (is_same_network(&ieee->current_network, network, ieee)) {
2311 update_network(&ieee->current_network, network);
2312 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2313 && ieee->current_network.berp_info_valid){
2314 if (ieee->current_network.erp_value & ERP_UseProtection)
2315 ieee->current_network.buseprotection = true;
2316 else
2317 ieee->current_network.buseprotection = false;
2318 }
2319 if (is_beacon(beacon->header.frame_ctl)) {
2320 if (ieee->state == IEEE80211_LINKED)
2321 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2322 } else //hidden AP
2323 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2324 }
2325
2326 list_for_each_entry(target, &ieee->network_list, list) {
2327 if (is_same_network(target, network, ieee))
2328 break;
2329 if (!oldest ||
2330 (target->last_scanned < oldest->last_scanned))
2331 oldest = target;
2332 }
2333
2334 /* If we didn't find a match, then get a new network slot to initialize
2335 * with this beacon's information */
2336 if (&target->list == &ieee->network_list) {
2337 if (list_empty(&ieee->network_free_list)) {
2338 /* If there are no more slots, expire the oldest */
2339 list_del(&oldest->list);
2340 target = oldest;
2341 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
2342 "network list.\n",
2343 escape_essid(target->ssid,
2344 target->ssid_len),
2345 target->bssid);
2346 } else {
2347 /* Otherwise just pull from the free list */
2348 target = list_entry(ieee->network_free_list.next,
2349 struct ieee80211_network, list);
2350 list_del(ieee->network_free_list.next);
2351 }
2352
2353
2354 #ifdef CONFIG_IEEE80211_DEBUG
2355 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
2356 escape_essid(network->ssid,
2357 network->ssid_len),
2358 network->bssid,
2359 fc == IEEE80211_STYPE_PROBE_RESP ?
2360 "PROBE RESPONSE" : "BEACON");
2361 #endif
2362 memcpy(target, network, sizeof(*target));
2363 list_add_tail(&target->list, &ieee->network_list);
2364 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2365 ieee80211_softmac_new_net(ieee, network);
2366 } else {
2367 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
2368 escape_essid(target->ssid,
2369 target->ssid_len),
2370 target->bssid,
2371 fc == IEEE80211_STYPE_PROBE_RESP ?
2372 "PROBE RESPONSE" : "BEACON");
2373
2374 /* we have an entry and we are going to update it. But this entry may
2375 * be already expired. In this case we do the same as we found a new
2376 * net and call the new_net handler
2377 */
2378 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2379 //YJ,add,080819,for hidden ap
2380 if (is_beacon(beacon->header.frame_ctl) == 0)
2381 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & target->flags);
2382 //if(strncmp(network->ssid, "linksys-c",9) == 0)
2383 // printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags);
2384 if (((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2385 && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\
2386 || ((ieee->current_network.ssid_len == network->ssid_len) && (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK))))
2387 renew = 1;
2388 //YJ,add,080819,for hidden ap,end
2389
2390 update_network(target, network);
2391 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2392 ieee80211_softmac_new_net(ieee, network);
2393 }
2394
2395 spin_unlock_irqrestore(&ieee->lock, flags);
2396 if (is_beacon(beacon->header.frame_ctl) && is_same_network(&ieee->current_network, network, ieee) && \
2397 (ieee->state == IEEE80211_LINKED)) {
2398 if (ieee->handle_beacon)
2399 ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network);
2400 }
2401
2402 out:
2403 kfree(network);
2404 }
2405
ieee80211_rx_mgt(struct ieee80211_device * ieee,struct rtl_80211_hdr_4addr * header,struct ieee80211_rx_stats * stats)2406 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2407 struct rtl_80211_hdr_4addr *header,
2408 struct ieee80211_rx_stats *stats)
2409 {
2410 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2411
2412 case IEEE80211_STYPE_BEACON:
2413 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2414 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2415 IEEE80211_DEBUG_SCAN("Beacon\n");
2416 ieee80211_process_probe_response(
2417 ieee, (struct ieee80211_probe_response *)header, stats);
2418 break;
2419
2420 case IEEE80211_STYPE_PROBE_RESP:
2421 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2422 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2423 IEEE80211_DEBUG_SCAN("Probe response\n");
2424 ieee80211_process_probe_response(
2425 ieee, (struct ieee80211_probe_response *)header, stats);
2426 break;
2427
2428 }
2429 }
2430 EXPORT_SYMBOL(ieee80211_rx_mgt);
2431