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)) < 0) {
1126 netdev_dbg(ieee->dev, "decrypt frame error\n");
1127 goto rx_dropped;
1128 }
1129
1130
1131 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1132
1133 /* skb: hdr + (possibly fragmented) plaintext payload */
1134 // PR: FIXME: hostap has additional conditions in the "if" below:
1135 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1136 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1137 int flen;
1138 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1139 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1140
1141 if (!frag_skb) {
1142 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1143 "Rx cannot get skb from fragment "
1144 "cache (morefrag=%d seq=%u frag=%u)\n",
1145 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1146 WLAN_GET_SEQ_SEQ(sc), frag);
1147 goto rx_dropped;
1148 }
1149 flen = skb->len;
1150 if (frag != 0)
1151 flen -= hdrlen;
1152
1153 if (frag_skb->tail + flen > frag_skb->end) {
1154 netdev_warn(dev, "host decrypted and "
1155 "reassembled frame did not fit skb\n");
1156 ieee80211_frag_cache_invalidate(ieee, hdr);
1157 goto rx_dropped;
1158 }
1159
1160 if (frag == 0) {
1161 /* copy first fragment (including full headers) into
1162 * beginning of the fragment cache skb */
1163 skb_put_data(frag_skb, skb->data, flen);
1164 } else {
1165 /* append frame payload to the end of the fragment
1166 * cache skb */
1167 skb_put_data(frag_skb, skb->data + hdrlen, flen);
1168 }
1169 dev_kfree_skb_any(skb);
1170 skb = NULL;
1171
1172 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1173 /* more fragments expected - leave the skb in fragment
1174 * cache for now; it will be delivered to upper layers
1175 * after all fragments have been received */
1176 goto rx_exit;
1177 }
1178
1179 /* this was the last fragment and the frame will be
1180 * delivered, so remove skb from fragment cache */
1181 skb = frag_skb;
1182 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1183 ieee80211_frag_cache_invalidate(ieee, hdr);
1184 }
1185
1186 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1187 * encrypted/authenticated */
1188 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1189 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1190 netdev_dbg(ieee->dev, "==>decrypt msdu error\n");
1191 goto rx_dropped;
1192 }
1193
1194 //added by amy for AP roaming
1195 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1196 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1197
1198 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1199 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1200 if (/*ieee->ieee802_1x &&*/
1201 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1202
1203 #ifdef CONFIG_IEEE80211_DEBUG
1204 /* pass unencrypted EAPOL frames even if encryption is
1205 * configured */
1206 struct eapol *eap = (struct eapol *)(skb->data +
1207 24);
1208 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1209 eap_get_type(eap->type));
1210 #endif
1211 } else {
1212 IEEE80211_DEBUG_DROP(
1213 "encryption configured, but RX "
1214 "frame not encrypted (SA=%pM)\n",
1215 hdr->addr2);
1216 goto rx_dropped;
1217 }
1218 }
1219
1220 #ifdef CONFIG_IEEE80211_DEBUG
1221 if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1222 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1223 struct eapol *eap = (struct eapol *)(skb->data +
1224 24);
1225 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1226 eap_get_type(eap->type));
1227 }
1228 #endif
1229
1230 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1231 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1232 IEEE80211_DEBUG_DROP(
1233 "dropped unencrypted RX data "
1234 "frame from %pM"
1235 " (drop_unencrypted=1)\n",
1236 hdr->addr2);
1237 goto rx_dropped;
1238 }
1239 /*
1240 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1241 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1242 }
1243 */
1244 //added by amy for reorder
1245 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1246 && !is_multicast_ether_addr(hdr->addr1)) {
1247 TID = Frame_QoSTID(skb->data);
1248 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1249 GetTs(ieee, (struct ts_common_info **)&pTS, hdr->addr2, TID, RX_DIR, true);
1250 if (TID != 0 && TID != 3)
1251 ieee->bis_any_nonbepkts = true;
1252 }
1253 //added by amy for reorder
1254 /* skb: hdr + (possible reassembled) full plaintext payload */
1255 //ethertype = (payload[6] << 8) | payload[7];
1256 rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC);
1257 if (!rxb)
1258 goto rx_dropped;
1259 /* to parse amsdu packets */
1260 /* qos data packets & reserved bit is 1 */
1261 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1262 /* only to free rxb, and not submit the packets to upper layer */
1263 for (i = 0; i < rxb->nr_subframes; i++)
1264 dev_kfree_skb(rxb->subframes[i]);
1265
1266 kfree(rxb);
1267 rxb = NULL;
1268 goto rx_dropped;
1269 }
1270
1271 //added by amy for reorder
1272 if (!ieee->pHTInfo->bCurRxReorderEnable || !pTS) {
1273 indicate_packets(ieee, rxb);
1274 kfree(rxb);
1275 rxb = NULL;
1276
1277 } else {
1278 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n", __func__);
1279 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1280 }
1281 #ifndef JOHN_NOCPY
1282 dev_kfree_skb(skb);
1283 #endif
1284
1285 rx_exit:
1286 #ifdef NOT_YET
1287 if (sta)
1288 hostap_handle_sta_release(sta);
1289 #endif
1290 return 1;
1291
1292 rx_dropped:
1293 kfree(rxb);
1294 rxb = NULL;
1295 stats->rx_dropped++;
1296
1297 /* Returning 0 indicates to caller that we have not handled the SKB--
1298 * so it is still allocated and can be used again by underlying
1299 * hardware as a DMA target */
1300 return 0;
1301 }
1302 EXPORT_SYMBOL(ieee80211_rx);
1303
1304 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
1305
1306 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1307
1308 /*
1309 * Make the structure we read from the beacon packet to have
1310 * the right values
1311 */
ieee80211_verify_qos_info(struct ieee80211_qos_information_element * info_element,int sub_type)1312 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1313 *info_element, int sub_type)
1314 {
1315 if (info_element->elementID != QOS_ELEMENT_ID)
1316 return -1;
1317 if (info_element->qui_subtype != sub_type)
1318 return -1;
1319 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1320 return -1;
1321 if (info_element->qui_type != QOS_OUI_TYPE)
1322 return -1;
1323 if (info_element->version != QOS_VERSION_1)
1324 return -1;
1325
1326 return 0;
1327 }
1328
1329
1330 /*
1331 * Parse a QoS parameter element
1332 */
ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info * element_param,struct ieee80211_info_element * info_element)1333 static int ieee80211_read_qos_param_element(
1334 struct ieee80211_qos_parameter_info *element_param,
1335 struct ieee80211_info_element *info_element)
1336 {
1337 size_t size = sizeof(*element_param);
1338
1339 if (!element_param || !info_element || info_element->len != size - 2)
1340 return -1;
1341
1342 memcpy(element_param, info_element, size);
1343 return ieee80211_verify_qos_info(&element_param->info_element,
1344 QOS_OUI_PARAM_SUB_TYPE);
1345 }
1346
1347 /*
1348 * Parse a QoS information element
1349 */
ieee80211_read_qos_info_element(struct ieee80211_qos_information_element * element_info,struct ieee80211_info_element * info_element)1350 static int ieee80211_read_qos_info_element(
1351 struct ieee80211_qos_information_element *element_info,
1352 struct ieee80211_info_element *info_element)
1353 {
1354 size_t size = sizeof(*element_info);
1355
1356 if (!element_info || !info_element || info_element->len != size - 2)
1357 return -1;
1358
1359 memcpy(element_info, info_element, size);
1360 return ieee80211_verify_qos_info(element_info, QOS_OUI_INFO_SUB_TYPE);
1361 }
1362
1363
1364 /*
1365 * Write QoS parameters from the ac parameters.
1366 */
ieee80211_qos_convert_ac_to_parameters(struct ieee80211_qos_parameter_info * param_elm,struct ieee80211_qos_parameters * qos_param)1367 static int ieee80211_qos_convert_ac_to_parameters(
1368 struct ieee80211_qos_parameter_info *param_elm,
1369 struct ieee80211_qos_parameters *qos_param)
1370 {
1371 int i;
1372 struct ieee80211_qos_ac_parameter *ac_params;
1373 u8 aci;
1374 //u8 cw_min;
1375 //u8 cw_max;
1376
1377 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1378 ac_params = &(param_elm->ac_params_record[i]);
1379
1380 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1381
1382 if (aci >= QOS_QUEUE_NUM)
1383 continue;
1384 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1385
1386 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1387 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1388
1389 qos_param->cw_min[aci] =
1390 cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1391
1392 qos_param->cw_max[aci] =
1393 cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1394
1395 qos_param->flag[aci] =
1396 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1397 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1398 }
1399 return 0;
1400 }
1401
1402 /*
1403 * we have a generic data element which it may contain QoS information or
1404 * parameters element. check the information element length to decide
1405 * which type to read
1406 */
ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element * info_element,struct ieee80211_network * network)1407 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1408 *info_element,
1409 struct ieee80211_network *network)
1410 {
1411 int rc = 0;
1412 struct ieee80211_qos_parameters *qos_param = NULL;
1413 struct ieee80211_qos_information_element qos_info_element;
1414
1415 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1416
1417 if (rc == 0) {
1418 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1419 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1420 } else {
1421 struct ieee80211_qos_parameter_info param_element;
1422
1423 rc = ieee80211_read_qos_param_element(¶m_element,
1424 info_element);
1425 if (rc == 0) {
1426 qos_param = &(network->qos_data.parameters);
1427 ieee80211_qos_convert_ac_to_parameters(¶m_element,
1428 qos_param);
1429 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1430 network->qos_data.param_count =
1431 param_element.info_element.ac_info & 0x0F;
1432 }
1433 }
1434
1435 if (rc == 0) {
1436 IEEE80211_DEBUG_QOS("QoS is supported\n");
1437 network->qos_data.supported = 1;
1438 }
1439 return rc;
1440 }
1441
1442 #ifdef CONFIG_IEEE80211_DEBUG
1443 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1444
get_info_element_string(u16 id)1445 static const char *get_info_element_string(u16 id)
1446 {
1447 switch (id) {
1448 MFIE_STRING(SSID);
1449 MFIE_STRING(RATES);
1450 MFIE_STRING(FH_SET);
1451 MFIE_STRING(DS_SET);
1452 MFIE_STRING(CF_SET);
1453 MFIE_STRING(TIM);
1454 MFIE_STRING(IBSS_SET);
1455 MFIE_STRING(COUNTRY);
1456 MFIE_STRING(HOP_PARAMS);
1457 MFIE_STRING(HOP_TABLE);
1458 MFIE_STRING(REQUEST);
1459 MFIE_STRING(CHALLENGE);
1460 MFIE_STRING(POWER_CONSTRAINT);
1461 MFIE_STRING(POWER_CAPABILITY);
1462 MFIE_STRING(TPC_REQUEST);
1463 MFIE_STRING(TPC_REPORT);
1464 MFIE_STRING(SUPP_CHANNELS);
1465 MFIE_STRING(CSA);
1466 MFIE_STRING(MEASURE_REQUEST);
1467 MFIE_STRING(MEASURE_REPORT);
1468 MFIE_STRING(QUIET);
1469 MFIE_STRING(IBSS_DFS);
1470 // MFIE_STRING(ERP_INFO);
1471 MFIE_STRING(RSN);
1472 MFIE_STRING(RATES_EX);
1473 MFIE_STRING(GENERIC);
1474 MFIE_STRING(QOS_PARAMETER);
1475 default:
1476 return "UNKNOWN";
1477 }
1478 }
1479 #endif
1480
ieee80211_extract_country_ie(struct ieee80211_device * ieee,struct ieee80211_info_element * info_element,struct ieee80211_network * network,u8 * addr2)1481 static inline void ieee80211_extract_country_ie(
1482 struct ieee80211_device *ieee,
1483 struct ieee80211_info_element *info_element,
1484 struct ieee80211_network *network,
1485 u8 *addr2
1486 )
1487 {
1488 if (IS_DOT11D_ENABLE(ieee)) {
1489 if (info_element->len != 0) {
1490 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1491 network->CountryIeLen = info_element->len;
1492
1493 if (!IS_COUNTRY_IE_VALID(ieee)) {
1494 dot11d_update_country_ie(ieee, addr2, info_element->len, info_element->data);
1495 }
1496 }
1497
1498 //
1499 // 070305, rcnjko: I update country IE watch dog here because
1500 // some AP (e.g. Cisco 1242) don't include country IE in their
1501 // probe response frame.
1502 //
1503 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1504 UPDATE_CIE_WATCHDOG(ieee);
1505 }
1506 }
1507
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)1508 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1509 struct ieee80211_info_element *info_element,
1510 u16 length,
1511 struct ieee80211_network *network,
1512 struct ieee80211_rx_stats *stats)
1513 {
1514 u8 i;
1515 short offset;
1516 u16 tmp_htcap_len = 0;
1517 u16 tmp_htinfo_len = 0;
1518 u16 ht_realtek_agg_len = 0;
1519 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1520 // u16 broadcom_len = 0;
1521 #ifdef CONFIG_IEEE80211_DEBUG
1522 char rates_str[64];
1523 char *p;
1524 #endif
1525
1526 while (length >= sizeof(*info_element)) {
1527 if (sizeof(*info_element) + info_element->len > length) {
1528 IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1529 "info_element->len + 2 > left : "
1530 "info_element->len+2=%zd left=%d, id=%d.\n",
1531 info_element->len +
1532 sizeof(*info_element),
1533 length, info_element->id);
1534 /* We stop processing but don't return an error here
1535 * because some misbehaviour APs break this rule. ie.
1536 * Orinoco AP1000. */
1537 break;
1538 }
1539
1540 switch (info_element->id) {
1541 case MFIE_TYPE_SSID:
1542 if (ieee80211_is_empty_essid(info_element->data,
1543 info_element->len)) {
1544 network->flags |= NETWORK_EMPTY_ESSID;
1545 break;
1546 }
1547
1548 network->ssid_len = min(info_element->len,
1549 (u8)IW_ESSID_MAX_SIZE);
1550 memcpy(network->ssid, info_element->data, network->ssid_len);
1551 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1552 memset(network->ssid + network->ssid_len, 0,
1553 IW_ESSID_MAX_SIZE - network->ssid_len);
1554
1555 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1556 network->ssid, network->ssid_len);
1557 break;
1558
1559 case MFIE_TYPE_RATES:
1560 #ifdef CONFIG_IEEE80211_DEBUG
1561 p = rates_str;
1562 #endif
1563 network->rates_len = min(info_element->len,
1564 MAX_RATES_LENGTH);
1565 for (i = 0; i < network->rates_len; i++) {
1566 network->rates[i] = info_element->data[i];
1567 #ifdef CONFIG_IEEE80211_DEBUG
1568 p += scnprintf(p, sizeof(rates_str) -
1569 (p - rates_str), "%02X ",
1570 network->rates[i]);
1571 #endif
1572 if (ieee80211_is_ofdm_rate
1573 (info_element->data[i])) {
1574 network->flags |= NETWORK_HAS_OFDM;
1575 if (info_element->data[i] &
1576 IEEE80211_BASIC_RATE_MASK)
1577 network->flags &=
1578 ~NETWORK_HAS_CCK;
1579 }
1580 }
1581
1582 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1583 rates_str, network->rates_len);
1584 break;
1585
1586 case MFIE_TYPE_RATES_EX:
1587 #ifdef CONFIG_IEEE80211_DEBUG
1588 p = rates_str;
1589 #endif
1590 network->rates_ex_len = min(info_element->len,
1591 MAX_RATES_EX_LENGTH);
1592 for (i = 0; i < network->rates_ex_len; i++) {
1593 network->rates_ex[i] = info_element->data[i];
1594 #ifdef CONFIG_IEEE80211_DEBUG
1595 p += scnprintf(p, sizeof(rates_str) -
1596 (p - rates_str), "%02X ",
1597 network->rates_ex[i]);
1598 #endif
1599 if (ieee80211_is_ofdm_rate
1600 (info_element->data[i])) {
1601 network->flags |= NETWORK_HAS_OFDM;
1602 if (info_element->data[i] &
1603 IEEE80211_BASIC_RATE_MASK)
1604 network->flags &=
1605 ~NETWORK_HAS_CCK;
1606 }
1607 }
1608
1609 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1610 rates_str, network->rates_ex_len);
1611 break;
1612
1613 case MFIE_TYPE_DS_SET:
1614 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1615 info_element->data[0]);
1616 network->channel = info_element->data[0];
1617 break;
1618
1619 case MFIE_TYPE_FH_SET:
1620 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1621 break;
1622
1623 case MFIE_TYPE_CF_SET:
1624 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1625 break;
1626
1627 case MFIE_TYPE_TIM:
1628 if (info_element->len < 4)
1629 break;
1630
1631 network->tim.tim_count = info_element->data[0];
1632 network->tim.tim_period = info_element->data[1];
1633
1634 network->dtim_period = info_element->data[1];
1635 if (ieee->state != IEEE80211_LINKED)
1636 break;
1637
1638 network->last_dtim_sta_time[0] = stats->mac_time[0];
1639 network->last_dtim_sta_time[1] = stats->mac_time[1];
1640
1641 network->dtim_data = IEEE80211_DTIM_VALID;
1642
1643 if (info_element->data[0] != 0)
1644 break;
1645
1646 if (info_element->data[2] & 1)
1647 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1648
1649 offset = (info_element->data[2] >> 1) * 2;
1650
1651 if (ieee->assoc_id < 8 * offset ||
1652 ieee->assoc_id > 8 * (offset + info_element->len - 3))
1653
1654 break;
1655
1656 offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1657
1658 if (info_element->data[3 + offset] & (1 << (ieee->assoc_id % 8)))
1659 network->dtim_data |= IEEE80211_DTIM_UCAST;
1660
1661 //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1662 break;
1663
1664 case MFIE_TYPE_ERP:
1665 network->erp_value = info_element->data[0];
1666 network->flags |= NETWORK_HAS_ERP_VALUE;
1667 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1668 network->erp_value);
1669 break;
1670 case MFIE_TYPE_IBSS_SET:
1671 network->atim_window = info_element->data[0];
1672 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1673 network->atim_window);
1674 break;
1675
1676 case MFIE_TYPE_CHALLENGE:
1677 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1678 break;
1679
1680 case MFIE_TYPE_GENERIC:
1681 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1682 info_element->len);
1683 if (!ieee80211_parse_qos_info_param_IE(info_element,
1684 network))
1685 break;
1686
1687 if (info_element->len >= 4 &&
1688 info_element->data[0] == 0x00 &&
1689 info_element->data[1] == 0x50 &&
1690 info_element->data[2] == 0xf2 &&
1691 info_element->data[3] == 0x01) {
1692 network->wpa_ie_len = min(info_element->len + 2,
1693 MAX_WPA_IE_LEN);
1694 memcpy(network->wpa_ie, info_element,
1695 network->wpa_ie_len);
1696 break;
1697 }
1698
1699 #ifdef THOMAS_TURBO
1700 if (info_element->len == 7 &&
1701 info_element->data[0] == 0x00 &&
1702 info_element->data[1] == 0xe0 &&
1703 info_element->data[2] == 0x4c &&
1704 info_element->data[3] == 0x01 &&
1705 info_element->data[4] == 0x02) {
1706 network->Turbo_Enable = 1;
1707 }
1708 #endif
1709
1710 //for HTcap and HTinfo parameters
1711 if (tmp_htcap_len == 0) {
1712 if (info_element->len >= 4 &&
1713 info_element->data[0] == 0x00 &&
1714 info_element->data[1] == 0x90 &&
1715 info_element->data[2] == 0x4c &&
1716 info_element->data[3] == 0x033){
1717
1718 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1719 if (tmp_htcap_len != 0) {
1720 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1721 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
1722 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1723 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1724 }
1725 }
1726 if (tmp_htcap_len != 0)
1727 network->bssht.bdSupportHT = true;
1728 else
1729 network->bssht.bdSupportHT = false;
1730 }
1731
1732
1733 if (tmp_htinfo_len == 0) {
1734 if (info_element->len >= 4 &&
1735 info_element->data[0] == 0x00 &&
1736 info_element->data[1] == 0x90 &&
1737 info_element->data[2] == 0x4c &&
1738 info_element->data[3] == 0x034){
1739
1740 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1741 if (tmp_htinfo_len != 0) {
1742 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1743 if (tmp_htinfo_len) {
1744 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
1745 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1746 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1747 }
1748
1749 }
1750
1751 }
1752 }
1753
1754 if (ieee->aggregation) {
1755 if (network->bssht.bdSupportHT) {
1756 if (info_element->len >= 4 &&
1757 info_element->data[0] == 0x00 &&
1758 info_element->data[1] == 0xe0 &&
1759 info_element->data[2] == 0x4c &&
1760 info_element->data[3] == 0x02){
1761
1762 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
1763 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1764
1765 }
1766 if (ht_realtek_agg_len >= 5) {
1767 network->bssht.bdRT2RTAggregation = true;
1768
1769 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1770 network->bssht.bdRT2RTLongSlotTime = true;
1771 }
1772 }
1773
1774 }
1775
1776 //if(tmp_htcap_len !=0 || tmp_htinfo_len != 0)
1777 {
1778 if ((info_element->len >= 3 &&
1779 info_element->data[0] == 0x00 &&
1780 info_element->data[1] == 0x05 &&
1781 info_element->data[2] == 0xb5) ||
1782 (info_element->len >= 3 &&
1783 info_element->data[0] == 0x00 &&
1784 info_element->data[1] == 0x0a &&
1785 info_element->data[2] == 0xf7) ||
1786 (info_element->len >= 3 &&
1787 info_element->data[0] == 0x00 &&
1788 info_element->data[1] == 0x10 &&
1789 info_element->data[2] == 0x18)){
1790
1791 network->broadcom_cap_exist = true;
1792
1793 }
1794 }
1795 if (info_element->len >= 3 &&
1796 info_element->data[0] == 0x00 &&
1797 info_element->data[1] == 0x0c &&
1798 info_element->data[2] == 0x43) {
1799 network->ralink_cap_exist = true;
1800 } else
1801 network->ralink_cap_exist = false;
1802 //added by amy for atheros AP
1803 if ((info_element->len >= 3 &&
1804 info_element->data[0] == 0x00 &&
1805 info_element->data[1] == 0x03 &&
1806 info_element->data[2] == 0x7f) ||
1807 (info_element->len >= 3 &&
1808 info_element->data[0] == 0x00 &&
1809 info_element->data[1] == 0x13 &&
1810 info_element->data[2] == 0x74)) {
1811 netdev_dbg(ieee->dev, "========> athros AP is exist\n");
1812 network->atheros_cap_exist = true;
1813 } else
1814 network->atheros_cap_exist = false;
1815
1816 if (info_element->len >= 3 &&
1817 info_element->data[0] == 0x00 &&
1818 info_element->data[1] == 0x40 &&
1819 info_element->data[2] == 0x96) {
1820 network->cisco_cap_exist = true;
1821 } else
1822 network->cisco_cap_exist = false;
1823 //added by amy for LEAP of cisco
1824 if (info_element->len > 4 &&
1825 info_element->data[0] == 0x00 &&
1826 info_element->data[1] == 0x40 &&
1827 info_element->data[2] == 0x96 &&
1828 info_element->data[3] == 0x01) {
1829 if (info_element->len == 6) {
1830 memcpy(network->CcxRmState, &info_element[4], 2);
1831 if (network->CcxRmState[0] != 0)
1832 network->bCcxRmEnable = true;
1833 else
1834 network->bCcxRmEnable = false;
1835 //
1836 // CCXv4 Table 59-1 MBSSID Masks.
1837 //
1838 network->MBssidMask = network->CcxRmState[1] & 0x07;
1839 if (network->MBssidMask != 0) {
1840 network->bMBssidValid = true;
1841 network->MBssidMask = 0xff << (network->MBssidMask);
1842 ether_addr_copy(network->MBssid, network->bssid);
1843 network->MBssid[5] &= network->MBssidMask;
1844 } else {
1845 network->bMBssidValid = false;
1846 }
1847 } else {
1848 network->bCcxRmEnable = false;
1849 }
1850 }
1851 if (info_element->len > 4 &&
1852 info_element->data[0] == 0x00 &&
1853 info_element->data[1] == 0x40 &&
1854 info_element->data[2] == 0x96 &&
1855 info_element->data[3] == 0x03) {
1856 if (info_element->len == 5) {
1857 network->bWithCcxVerNum = true;
1858 network->BssCcxVerNumber = info_element->data[4];
1859 } else {
1860 network->bWithCcxVerNum = false;
1861 network->BssCcxVerNumber = 0;
1862 }
1863 }
1864 break;
1865
1866 case MFIE_TYPE_RSN:
1867 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1868 info_element->len);
1869 network->rsn_ie_len = min(info_element->len + 2,
1870 MAX_WPA_IE_LEN);
1871 memcpy(network->rsn_ie, info_element,
1872 network->rsn_ie_len);
1873 break;
1874
1875 //HT related element.
1876 case MFIE_TYPE_HT_CAP:
1877 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
1878 info_element->len);
1879 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1880 if (tmp_htcap_len != 0) {
1881 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1882 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
1883 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1884 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1885
1886 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
1887 // windows driver will update WMM parameters each beacon received once connected
1888 // Linux driver is a bit different.
1889 network->bssht.bdSupportHT = true;
1890 } else
1891 network->bssht.bdSupportHT = false;
1892 break;
1893
1894
1895 case MFIE_TYPE_HT_INFO:
1896 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
1897 info_element->len);
1898 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1899 if (tmp_htinfo_len) {
1900 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
1901 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
1902 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1903 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1904 }
1905 break;
1906
1907 case MFIE_TYPE_AIRONET:
1908 IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
1909 info_element->len);
1910 if (info_element->len > IE_CISCO_FLAG_POSITION) {
1911 network->bWithAironetIE = true;
1912
1913 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
1914 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
1915 // by adding an Aironet element and setting one or both of the CKIP negotiation bits."
1916 if ((info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_MIC) ||
1917 (info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_PK)) {
1918 network->bCkipSupported = true;
1919 } else {
1920 network->bCkipSupported = false;
1921 }
1922 } else {
1923 network->bWithAironetIE = false;
1924 network->bCkipSupported = false;
1925 }
1926 break;
1927 case MFIE_TYPE_QOS_PARAMETER:
1928 netdev_err(ieee->dev,
1929 "QoS Error need to parse QOS_PARAMETER IE\n");
1930 break;
1931
1932 case MFIE_TYPE_COUNTRY:
1933 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
1934 info_element->len);
1935 ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
1936 break;
1937 /* TODO */
1938 default:
1939 IEEE80211_DEBUG_MGMT
1940 ("Unsupported info element: %s (%d)\n",
1941 get_info_element_string(info_element->id),
1942 info_element->id);
1943 break;
1944 }
1945
1946 length -= sizeof(*info_element) + info_element->len;
1947 info_element =
1948 (struct ieee80211_info_element *)&info_element->
1949 data[info_element->len];
1950 }
1951
1952 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
1953 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) {
1954 network->unknown_cap_exist = true;
1955 } else {
1956 network->unknown_cap_exist = false;
1957 }
1958 return 0;
1959 }
1960
ieee80211_SignalStrengthTranslate(u8 CurrSS)1961 static inline u8 ieee80211_SignalStrengthTranslate(
1962 u8 CurrSS
1963 )
1964 {
1965 u8 RetSS;
1966
1967 // Step 1. Scale mapping.
1968 if (CurrSS >= 71 && CurrSS <= 100) {
1969 RetSS = 90 + ((CurrSS - 70) / 3);
1970 } else if (CurrSS >= 41 && CurrSS <= 70) {
1971 RetSS = 78 + ((CurrSS - 40) / 3);
1972 } else if (CurrSS >= 31 && CurrSS <= 40) {
1973 RetSS = 66 + (CurrSS - 30);
1974 } else if (CurrSS >= 21 && CurrSS <= 30) {
1975 RetSS = 54 + (CurrSS - 20);
1976 } else if (CurrSS >= 5 && CurrSS <= 20) {
1977 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
1978 } else if (CurrSS == 4) {
1979 RetSS = 36;
1980 } else if (CurrSS == 3) {
1981 RetSS = 27;
1982 } else if (CurrSS == 2) {
1983 RetSS = 18;
1984 } else if (CurrSS == 1) {
1985 RetSS = 9;
1986 } else {
1987 RetSS = CurrSS;
1988 }
1989 //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
1990
1991 // Step 2. Smoothing.
1992
1993 //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
1994
1995 return RetSS;
1996 }
1997
1998 /* 0-100 index */
ieee80211_translate_todbm(u8 signal_strength_index)1999 static long ieee80211_translate_todbm(u8 signal_strength_index)
2000 {
2001 long signal_power; // in dBm.
2002
2003 // Translate to dBm (x=0.5y-95).
2004 signal_power = (long)((signal_strength_index + 1) >> 1);
2005 signal_power -= 95;
2006
2007 return signal_power;
2008 }
2009
ieee80211_network_init(struct ieee80211_device * ieee,struct ieee80211_probe_response * beacon,struct ieee80211_network * network,struct ieee80211_rx_stats * stats)2010 static inline int ieee80211_network_init(
2011 struct ieee80211_device *ieee,
2012 struct ieee80211_probe_response *beacon,
2013 struct ieee80211_network *network,
2014 struct ieee80211_rx_stats *stats)
2015 {
2016 #ifdef CONFIG_IEEE80211_DEBUG
2017 //char rates_str[64];
2018 //char *p;
2019 #endif
2020
2021 network->qos_data.active = 0;
2022 network->qos_data.supported = 0;
2023 network->qos_data.param_count = 0;
2024 network->qos_data.old_param_count = 0;
2025
2026 /* Pull out fixed field data */
2027 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2028 network->capability = le16_to_cpu(beacon->capability);
2029 network->last_scanned = jiffies;
2030 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2031 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2032 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2033 /* Where to pull this? beacon->listen_interval;*/
2034 network->listen_interval = 0x0A;
2035 network->rates_len = network->rates_ex_len = 0;
2036 network->last_associate = 0;
2037 network->ssid_len = 0;
2038 network->flags = 0;
2039 network->atim_window = 0;
2040 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2041 0x3 : 0x0;
2042 network->berp_info_valid = false;
2043 network->broadcom_cap_exist = false;
2044 network->ralink_cap_exist = false;
2045 network->atheros_cap_exist = false;
2046 network->cisco_cap_exist = false;
2047 network->unknown_cap_exist = false;
2048 #ifdef THOMAS_TURBO
2049 network->Turbo_Enable = 0;
2050 #endif
2051 network->CountryIeLen = 0;
2052 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2053 //Initialize HT parameters
2054 //ieee80211_ht_initialize(&network->bssht);
2055 HTInitializeBssDesc(&network->bssht);
2056 if (stats->freq == IEEE80211_52GHZ_BAND) {
2057 /* for A band (No DS info) */
2058 network->channel = stats->received_channel;
2059 } else
2060 network->flags |= NETWORK_HAS_CCK;
2061
2062 network->wpa_ie_len = 0;
2063 network->rsn_ie_len = 0;
2064
2065 if (ieee80211_parse_info_param
2066 (ieee, beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2067 return 1;
2068
2069 network->mode = 0;
2070 if (stats->freq == IEEE80211_52GHZ_BAND)
2071 network->mode = IEEE_A;
2072 else {
2073 if (network->flags & NETWORK_HAS_OFDM)
2074 network->mode |= IEEE_G;
2075 if (network->flags & NETWORK_HAS_CCK)
2076 network->mode |= IEEE_B;
2077 }
2078
2079 if (network->mode == 0) {
2080 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
2081 "network.\n",
2082 escape_essid(network->ssid,
2083 network->ssid_len),
2084 network->bssid);
2085 return 1;
2086 }
2087
2088 if (network->bssht.bdSupportHT) {
2089 if (network->mode == IEEE_A)
2090 network->mode = IEEE_N_5G;
2091 else if (network->mode & (IEEE_G | IEEE_B))
2092 network->mode = IEEE_N_24G;
2093 }
2094 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2095 network->flags |= NETWORK_EMPTY_ESSID;
2096
2097 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2098 //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2099 stats->noise = ieee80211_translate_todbm((u8)(100 - stats->signal)) - 25;
2100
2101 memcpy(&network->stats, stats, sizeof(network->stats));
2102
2103 return 0;
2104 }
2105
is_same_network(struct ieee80211_network * src,struct ieee80211_network * dst,struct ieee80211_device * ieee)2106 static inline int is_same_network(struct ieee80211_network *src,
2107 struct ieee80211_network *dst, struct ieee80211_device *ieee)
2108 {
2109 /* A network is only a duplicate if the channel, BSSID, ESSID
2110 * and the capability field (in particular IBSS and BSS) all match.
2111 * We treat all <hidden> with the same BSSID and channel
2112 * as one network */
2113 return //((src->ssid_len == dst->ssid_len) &&
2114 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2115 (src->channel == dst->channel) &&
2116 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2117 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2118 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2119 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2120 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2121 ((src->capability & WLAN_CAPABILITY_BSS) ==
2122 (dst->capability & WLAN_CAPABILITY_BSS)));
2123 }
2124
update_network(struct ieee80211_network * dst,struct ieee80211_network * src)2125 static inline void update_network(struct ieee80211_network *dst,
2126 struct ieee80211_network *src)
2127 {
2128 int qos_active;
2129 u8 old_param;
2130
2131 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2132 dst->capability = src->capability;
2133 memcpy(dst->rates, src->rates, src->rates_len);
2134 dst->rates_len = src->rates_len;
2135 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2136 dst->rates_ex_len = src->rates_ex_len;
2137 if (src->ssid_len > 0) {
2138 memset(dst->ssid, 0, dst->ssid_len);
2139 dst->ssid_len = src->ssid_len;
2140 memcpy(dst->ssid, src->ssid, src->ssid_len);
2141 }
2142 dst->mode = src->mode;
2143 dst->flags = src->flags;
2144 dst->time_stamp[0] = src->time_stamp[0];
2145 dst->time_stamp[1] = src->time_stamp[1];
2146 if (src->flags & NETWORK_HAS_ERP_VALUE) {
2147 dst->erp_value = src->erp_value;
2148 dst->berp_info_valid = src->berp_info_valid = true;
2149 }
2150 dst->beacon_interval = src->beacon_interval;
2151 dst->listen_interval = src->listen_interval;
2152 dst->atim_window = src->atim_window;
2153 dst->dtim_period = src->dtim_period;
2154 dst->dtim_data = src->dtim_data;
2155 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2156 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2157 memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2158
2159 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2160 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2161 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2162 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, src->bssht.bdHTCapLen);
2163 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2164 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, src->bssht.bdHTInfoLen);
2165 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2166 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2167 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2168 dst->ralink_cap_exist = src->ralink_cap_exist;
2169 dst->atheros_cap_exist = src->atheros_cap_exist;
2170 dst->cisco_cap_exist = src->cisco_cap_exist;
2171 dst->unknown_cap_exist = src->unknown_cap_exist;
2172 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2173 dst->wpa_ie_len = src->wpa_ie_len;
2174 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2175 dst->rsn_ie_len = src->rsn_ie_len;
2176
2177 dst->last_scanned = jiffies;
2178 /* qos related parameters */
2179 //qos_active = src->qos_data.active;
2180 qos_active = dst->qos_data.active;
2181 //old_param = dst->qos_data.old_param_count;
2182 old_param = dst->qos_data.param_count;
2183 if (dst->flags & NETWORK_HAS_QOS_MASK)
2184 memcpy(&dst->qos_data, &src->qos_data,
2185 sizeof(struct ieee80211_qos_data));
2186 else {
2187 dst->qos_data.supported = src->qos_data.supported;
2188 dst->qos_data.param_count = src->qos_data.param_count;
2189 }
2190
2191 if (dst->qos_data.supported == 1) {
2192 dst->QoS_Enable = 1;
2193 if (dst->ssid_len)
2194 IEEE80211_DEBUG_QOS
2195 ("QoS the network %s is QoS supported\n",
2196 dst->ssid);
2197 else
2198 IEEE80211_DEBUG_QOS
2199 ("QoS the network is QoS supported\n");
2200 }
2201 dst->qos_data.active = qos_active;
2202 dst->qos_data.old_param_count = old_param;
2203
2204 /* dst->last_associate is not overwritten */
2205 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2206 if (src->wmm_param[0].aci_aifsn || \
2207 src->wmm_param[1].aci_aifsn || \
2208 src->wmm_param[2].aci_aifsn || \
2209 src->wmm_param[3].aci_aifsn) {
2210 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2211 }
2212 //dst->QoS_Enable = src->QoS_Enable;
2213 #ifdef THOMAS_TURBO
2214 dst->Turbo_Enable = src->Turbo_Enable;
2215 #endif
2216
2217 dst->CountryIeLen = src->CountryIeLen;
2218 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2219
2220 //added by amy for LEAP
2221 dst->bWithAironetIE = src->bWithAironetIE;
2222 dst->bCkipSupported = src->bCkipSupported;
2223 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2224 dst->bCcxRmEnable = src->bCcxRmEnable;
2225 dst->MBssidMask = src->MBssidMask;
2226 dst->bMBssidValid = src->bMBssidValid;
2227 memcpy(dst->MBssid, src->MBssid, 6);
2228 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2229 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2230
2231 }
2232
is_beacon(__le16 fc)2233 static inline int is_beacon(__le16 fc)
2234 {
2235 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2236 }
2237
ieee80211_process_probe_response(struct ieee80211_device * ieee,struct ieee80211_probe_response * beacon,struct ieee80211_rx_stats * stats)2238 static inline void ieee80211_process_probe_response(
2239 struct ieee80211_device *ieee,
2240 struct ieee80211_probe_response *beacon,
2241 struct ieee80211_rx_stats *stats)
2242 {
2243 struct ieee80211_network *network;
2244 struct ieee80211_network *target;
2245 struct ieee80211_network *oldest = NULL;
2246 #ifdef CONFIG_IEEE80211_DEBUG
2247 struct ieee80211_info_element *info_element = &beacon->info_element[0];
2248 #endif
2249 int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl));
2250 unsigned long flags;
2251 short renew;
2252 u16 capability;
2253 //u8 wmm_info;
2254
2255 network = kzalloc(sizeof(*network), GFP_ATOMIC);
2256 if (!network)
2257 goto out;
2258
2259 capability = le16_to_cpu(beacon->capability);
2260 IEEE80211_DEBUG_SCAN(
2261 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2262 escape_essid(info_element->data, info_element->len),
2263 beacon->header.addr3,
2264 (capability & BIT(0xf)) ? '1' : '0',
2265 (capability & BIT(0xe)) ? '1' : '0',
2266 (capability & BIT(0xd)) ? '1' : '0',
2267 (capability & BIT(0xc)) ? '1' : '0',
2268 (capability & BIT(0xb)) ? '1' : '0',
2269 (capability & BIT(0xa)) ? '1' : '0',
2270 (capability & BIT(0x9)) ? '1' : '0',
2271 (capability & BIT(0x8)) ? '1' : '0',
2272 (capability & BIT(0x7)) ? '1' : '0',
2273 (capability & BIT(0x6)) ? '1' : '0',
2274 (capability & BIT(0x5)) ? '1' : '0',
2275 (capability & BIT(0x4)) ? '1' : '0',
2276 (capability & BIT(0x3)) ? '1' : '0',
2277 (capability & BIT(0x2)) ? '1' : '0',
2278 (capability & BIT(0x1)) ? '1' : '0',
2279 (capability & BIT(0x0)) ? '1' : '0');
2280
2281 if (ieee80211_network_init(ieee, beacon, network, stats)) {
2282 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
2283 escape_essid(info_element->data,
2284 info_element->len),
2285 beacon->header.addr3,
2286 fc == IEEE80211_STYPE_PROBE_RESP ?
2287 "PROBE RESPONSE" : "BEACON");
2288 goto out;
2289 }
2290
2291 // For Asus EeePc request,
2292 // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2293 // wireless adapter should follow the country code.
2294 // (2) If there is no any country code in beacon,
2295 // then wireless adapter should do active scan from ch1~11 and
2296 // passive scan from ch12~14
2297
2298 if (!is_legal_channel(ieee, network->channel))
2299 goto out;
2300 if (ieee->bGlobalDomain) {
2301 if (fc == IEEE80211_STYPE_PROBE_RESP) {
2302 if (IS_COUNTRY_IE_VALID(ieee)) {
2303 // Case 1: Country code
2304 if (!is_legal_channel(ieee, network->channel)) {
2305 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel);
2306 goto out;
2307 }
2308 } else {
2309 // Case 2: No any country code.
2310 // Filter over channel ch12~14
2311 if (network->channel > 11) {
2312 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel);
2313 goto out;
2314 }
2315 }
2316 } else {
2317 if (IS_COUNTRY_IE_VALID(ieee)) {
2318 // Case 1: Country code
2319 if (!is_legal_channel(ieee, network->channel)) {
2320 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network->channel);
2321 goto out;
2322 }
2323 } else {
2324 // Case 2: No any country code.
2325 // Filter over channel ch12~14
2326 if (network->channel > 14) {
2327 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network->channel);
2328 goto out;
2329 }
2330 }
2331 }
2332 }
2333
2334 /* The network parsed correctly -- so now we scan our known networks
2335 * to see if we can find it in our list.
2336 *
2337 * NOTE: This search is definitely not optimized. Once its doing
2338 * the "right thing" we'll optimize it for efficiency if
2339 * necessary */
2340
2341 /* Search for this entry in the list and update it if it is
2342 * already there. */
2343
2344 spin_lock_irqsave(&ieee->lock, flags);
2345
2346 if (is_same_network(&ieee->current_network, network, ieee)) {
2347 update_network(&ieee->current_network, network);
2348 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2349 && ieee->current_network.berp_info_valid){
2350 if (ieee->current_network.erp_value & ERP_UseProtection)
2351 ieee->current_network.buseprotection = true;
2352 else
2353 ieee->current_network.buseprotection = false;
2354 }
2355 if (is_beacon(beacon->header.frame_ctl)) {
2356 if (ieee->state == IEEE80211_LINKED)
2357 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2358 } else //hidden AP
2359 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2360 }
2361
2362 list_for_each_entry(target, &ieee->network_list, list) {
2363 if (is_same_network(target, network, ieee))
2364 break;
2365 if (!oldest ||
2366 (target->last_scanned < oldest->last_scanned))
2367 oldest = target;
2368 }
2369
2370 /* If we didn't find a match, then get a new network slot to initialize
2371 * with this beacon's information */
2372 if (&target->list == &ieee->network_list) {
2373 if (list_empty(&ieee->network_free_list)) {
2374 /* If there are no more slots, expire the oldest */
2375 list_del(&oldest->list);
2376 target = oldest;
2377 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
2378 "network list.\n",
2379 escape_essid(target->ssid,
2380 target->ssid_len),
2381 target->bssid);
2382 } else {
2383 /* Otherwise just pull from the free list */
2384 target = list_entry(ieee->network_free_list.next,
2385 struct ieee80211_network, list);
2386 list_del(ieee->network_free_list.next);
2387 }
2388
2389
2390 #ifdef CONFIG_IEEE80211_DEBUG
2391 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
2392 escape_essid(network->ssid,
2393 network->ssid_len),
2394 network->bssid,
2395 fc == IEEE80211_STYPE_PROBE_RESP ?
2396 "PROBE RESPONSE" : "BEACON");
2397 #endif
2398 memcpy(target, network, sizeof(*target));
2399 list_add_tail(&target->list, &ieee->network_list);
2400 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2401 ieee80211_softmac_new_net(ieee, network);
2402 } else {
2403 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
2404 escape_essid(target->ssid,
2405 target->ssid_len),
2406 target->bssid,
2407 fc == IEEE80211_STYPE_PROBE_RESP ?
2408 "PROBE RESPONSE" : "BEACON");
2409
2410 /* we have an entry and we are going to update it. But this entry may
2411 * be already expired. In this case we do the same as we found a new
2412 * net and call the new_net handler
2413 */
2414 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2415 //YJ,add,080819,for hidden ap
2416 if (is_beacon(beacon->header.frame_ctl) == 0)
2417 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & target->flags);
2418 //if(strncmp(network->ssid, "linksys-c",9) == 0)
2419 // printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags);
2420 if (((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2421 && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\
2422 || ((ieee->current_network.ssid_len == network->ssid_len) && (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK))))
2423 renew = 1;
2424 //YJ,add,080819,for hidden ap,end
2425
2426 update_network(target, network);
2427 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2428 ieee80211_softmac_new_net(ieee, network);
2429 }
2430
2431 spin_unlock_irqrestore(&ieee->lock, flags);
2432 if (is_beacon(beacon->header.frame_ctl) && is_same_network(&ieee->current_network, network, ieee) && \
2433 (ieee->state == IEEE80211_LINKED)) {
2434 if (ieee->handle_beacon)
2435 ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network);
2436 }
2437
2438 out:
2439 kfree(network);
2440 }
2441
ieee80211_rx_mgt(struct ieee80211_device * ieee,struct rtl_80211_hdr_4addr * header,struct ieee80211_rx_stats * stats)2442 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2443 struct rtl_80211_hdr_4addr *header,
2444 struct ieee80211_rx_stats *stats)
2445 {
2446 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2447
2448 case IEEE80211_STYPE_BEACON:
2449 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2450 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2451 IEEE80211_DEBUG_SCAN("Beacon\n");
2452 ieee80211_process_probe_response(
2453 ieee, (struct ieee80211_probe_response *)header, stats);
2454 break;
2455
2456 case IEEE80211_STYPE_PROBE_RESP:
2457 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2458 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2459 IEEE80211_DEBUG_SCAN("Probe response\n");
2460 ieee80211_process_probe_response(
2461 ieee, (struct ieee80211_probe_response *)header, stats);
2462 break;
2463
2464 }
2465 }
2466 EXPORT_SYMBOL(ieee80211_rx_mgt);
2467