drivers/staging/rtl8192su/ieee80211/ieee80211_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2004, Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation. See README and COPYING for
  13  * more details.
  14  ******************************************************************************
  15
  16   Few modifications for Realtek's Wi-Fi drivers by
  17   Andrea Merello <andreamrl@tiscali.it>
  18
  19   A special thanks goes to Realtek for their support !
  20
  21 ******************************************************************************/
  22
  23
  24 #include <linux/compiler.h>
  25 //#include <linux/config.h>
  26 #include <linux/errno.h>
  27 #include <linux/if_arp.h>
  28 #include <linux/in6.h>
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/pci.h>
  35 #include <linux/proc_fs.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/slab.h>
  38 #include <linux/tcp.h>
  39 #include <linux/types.h>
  40 #include <linux/version.h>
  41 #include <linux/wireless.h>
  42 #include <linux/etherdevice.h>
  43 #include <asm/uaccess.h>
  44 #include <linux/ctype.h>
  45
  46 #include "ieee80211.h"
  47 #include "dot11d.h"
  48 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  49                                         struct sk_buff *skb,
  50                                         struct ieee80211_rx_stats *rx_stats)
  51 {
  52         struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *)skb->data;
  53         u16 fc = le16_to_cpu(hdr->frame_ctl);
  54
  55         skb->dev = ieee->dev;
  56         skb_reset_mac_header(skb);
  57
  58         skb_pull(skb, ieee80211_get_hdrlen(fc));
  59         skb->pkt_type = PACKET_OTHERHOST;
  60         skb->protocol = __constant_htons(ETH_P_80211_RAW);
  61         memset(skb->cb, 0, sizeof(skb->cb));
  62         netif_rx(skb);
  63 }
  64
  65
  66 /* Called only as a tasklet (software IRQ) */
  67 static struct ieee80211_frag_entry *
  68 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
  69                           unsigned int frag, u8 tid,u8 *src, u8 *dst)
  70 {
  71         struct ieee80211_frag_entry *entry;
  72         int i;
  73
  74         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  75                 entry = &ieee->frag_cache[tid][i];
  76                 if (entry->skb != NULL &&
  77                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  78                         IEEE80211_DEBUG_FRAG(
  79                                 "expiring fragment cache entry "
  80                                 "seq=%u last_frag=%u\n",
  81                                 entry->seq, entry->last_frag);
  82                         dev_kfree_skb_any(entry->skb);
  83                         entry->skb = NULL;
  84                 }
  85
  86                 if (entry->skb != NULL && entry->seq == seq &&
  87                     (entry->last_frag + 1 == frag || frag == -1) &&
  88                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  89                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  90                         return entry;
  91         }
  92
  93         return NULL;
  94 }
  95
  96 /* Called only as a tasklet (software IRQ) */
  97 static struct sk_buff *
  98 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  99                          struct ieee80211_hdr_4addr *hdr)
 100 {
 101         struct sk_buff *skb = NULL;
 102         u16 fc = le16_to_cpu(hdr->frame_ctl);
 103         u16 sc = le16_to_cpu(hdr->seq_ctl);
 104         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
 105         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 106         struct ieee80211_frag_entry *entry;
 107         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 108         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 109         u8 tid;
 110
 111         if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 112           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
 113           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 114           tid = UP2AC(tid);
 115           tid ++;
 116         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 117           hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
 118           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 119           tid = UP2AC(tid);
 120           tid ++;
 121         } else {
 122           tid = 0;
 123         }
 124
 125         if (frag == 0) {
 126                 /* Reserve enough space to fit maximum frame length */
 127                 skb = dev_alloc_skb(ieee->dev->mtu +
 128                                     sizeof(struct ieee80211_hdr_4addr) +
 129                                     8 /* LLC */ +
 130                                     2 /* alignment */ +
 131                                     8 /* WEP */ +
 132                                     ETH_ALEN /* WDS */ +
 133                                     (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
 134                 if (skb == NULL)
 135                         return NULL;
 136
 137                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 138                 ieee->frag_next_idx[tid]++;
 139                 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
 140                         ieee->frag_next_idx[tid] = 0;
 141
 142                 if (entry->skb != NULL)
 143                         dev_kfree_skb_any(entry->skb);
 144
 145                 entry->first_frag_time = jiffies;
 146                 entry->seq = seq;
 147                 entry->last_frag = frag;
 148                 entry->skb = skb;
 149                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 150                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 151         } else {
 152                 /* received a fragment of a frame for which the head fragment
 153                  * should have already been received */
 154                 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
 155                                                   hdr->addr1);
 156                 if (entry != NULL) {
 157                         entry->last_frag = frag;
 158                         skb = entry->skb;
 159                 }
 160         }
 161
 162         return skb;
 163 }
 164
 165
 166 /* Called only as a tasklet (software IRQ) */
 167 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 168                                            struct ieee80211_hdr_4addr *hdr)
 169 {
 170         u16 fc = le16_to_cpu(hdr->frame_ctl);
 171         u16 sc = le16_to_cpu(hdr->seq_ctl);
 172         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 173         struct ieee80211_frag_entry *entry;
 174         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 175         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 176         u8 tid;
 177
 178         if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 179           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
 180           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 181           tid = UP2AC(tid);
 182           tid ++;
 183         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 184           hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
 185           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 186           tid = UP2AC(tid);
 187           tid ++;
 188         } else {
 189           tid = 0;
 190         }
 191
 192         entry = ieee80211_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
 193                                           hdr->addr1);
 194
 195         if (entry == NULL) {
 196                 IEEE80211_DEBUG_FRAG(
 197                         "could not invalidate fragment cache "
 198                         "entry (seq=%u)\n", seq);
 199                 return -1;
 200         }
 201
 202         entry->skb = NULL;
 203         return 0;
 204 }
 205
 206
 207
 208 /* ieee80211_rx_frame_mgtmt
 209  *
 210  * Responsible for handling management control frames
 211  *
 212  * Called by ieee80211_rx */
 213 static inline int
 214 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 215                         struct ieee80211_rx_stats *rx_stats, u16 type,
 216                         u16 stype)
 217 {
 218         /* On the struct stats definition there is written that
 219          * this is not mandatory.... but seems that the probe
 220          * response parser uses it
 221          */
 222         struct ieee80211_hdr_3addr * hdr = (struct ieee80211_hdr_3addr *)skb->data;
 223
 224         rx_stats->len = skb->len;
 225         ieee80211_rx_mgt(ieee,(struct ieee80211_hdr_4addr *)skb->data,rx_stats);
 226         //if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN)))
 227         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN)))//use ADDR1 to perform address matching for Management frames
 228         {
 229                 dev_kfree_skb_any(skb);
 230                 return 0;
 231         }
 232
 233         ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 234
 235         dev_kfree_skb_any(skb);
 236
 237         return 0;
 238
 239 }
 240
 241
 242
 243 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 244 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 245 static unsigned char rfc1042_header[] =
 246 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 247 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 248 static unsigned char bridge_tunnel_header[] =
 249 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 250 /* No encapsulation header if EtherType < 0x600 (=length) */
 251
 252 /* Called by ieee80211_rx_frame_decrypt */
 253 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 254                                     struct sk_buff *skb, size_t hdrlen)
 255 {
 256         struct net_device *dev = ieee->dev;
 257         u16 fc, ethertype;
 258         struct ieee80211_hdr_4addr *hdr;
 259         u8 *pos;
 260
 261         if (skb->len < 24)
 262                 return 0;
 263
 264         hdr = (struct ieee80211_hdr_4addr *) skb->data;
 265         fc = le16_to_cpu(hdr->frame_ctl);
 266
 267         /* check that the frame is unicast frame to us */
 268         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 269             IEEE80211_FCTL_TODS &&
 270             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 271             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 272                 /* ToDS frame with own addr BSSID and DA */
 273         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 274                    IEEE80211_FCTL_FROMDS &&
 275                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 276                 /* FromDS frame with own addr as DA */
 277         } else
 278                 return 0;
 279
 280         if (skb->len < 24 + 8)
 281                 return 0;
 282
 283         /* check for port access entity Ethernet type */
 284 //      pos = skb->data + 24;
 285         pos = skb->data + hdrlen;
 286         ethertype = (pos[6] << 8) | pos[7];
 287         if (ethertype == ETH_P_PAE)
 288                 return 1;
 289
 290         return 0;
 291 }
 292
 293 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 294 static inline int
 295 ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
 296                            struct ieee80211_crypt_data *crypt)
 297 {
 298         struct ieee80211_hdr_4addr *hdr;
 299         int res, hdrlen;
 300
 301         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 302                 return 0;
 303 #if 1
 304         if (ieee->hwsec_active)
 305         {
 306                 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 307                 tcb_desc->bHwSec = 1;
 308         }
 309 #endif
 310         hdr = (struct ieee80211_hdr_4addr *) skb->data;
 311         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 312
 313 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
 314         if (ieee->tkip_countermeasures &&
 315             strcmp(crypt->ops->name, "TKIP") == 0) {
 316                 if (net_ratelimit()) {
 317                         printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
 318                                "received packet from " MAC_FMT "\n",
 319                                ieee->dev->name, MAC_ARG(hdr->addr2));
 320                 }
 321                 return -1;
 322         }
 323 #endif
 324
 325         atomic_inc(&crypt->refcnt);
 326         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 327         atomic_dec(&crypt->refcnt);
 328         if (res < 0) {
 329                 IEEE80211_DEBUG_DROP(
 330                         "decryption failed (SA=" MAC_FMT
 331                         ") res=%d\n", MAC_ARG(hdr->addr2), res);
 332                 if (res == -2)
 333                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 334                                              "mismatch (key %d)\n",
 335                                              skb->data[hdrlen + 3] >> 6);
 336                 ieee->ieee_stats.rx_discards_undecryptable++;
 337                 return -1;
 338         }
 339
 340         return res;
 341 }
 342
 343
 344 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 345 static inline int
 346 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
 347                              int keyidx, struct ieee80211_crypt_data *crypt)
 348 {
 349         struct ieee80211_hdr_4addr *hdr;
 350         int res, hdrlen;
 351
 352         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 353                 return 0;
 354         if (ieee->hwsec_active)
 355         {
 356                 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 357                 tcb_desc->bHwSec = 1;
 358         }
 359
 360         hdr = (struct ieee80211_hdr_4addr *) skb->data;
 361         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 362
 363         atomic_inc(&crypt->refcnt);
 364         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 365         atomic_dec(&crypt->refcnt);
 366         if (res < 0) {
 367                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 368                        " (SA=" MAC_FMT " keyidx=%d)\n",
 369                        ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
 370                 return -1;
 371         }
 372
 373         return 0;
 374 }
 375
 376
 377 /* this function is stolen from ipw2200 driver*/
 378 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 379 static int is_duplicate_packet(struct ieee80211_device *ieee,
 380                                       struct ieee80211_hdr_4addr *header)
 381 {
 382         u16 fc = le16_to_cpu(header->frame_ctl);
 383         u16 sc = le16_to_cpu(header->seq_ctl);
 384         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 385         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 386         u16 *last_seq, *last_frag;
 387         unsigned long *last_time;
 388         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 389         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 390         u8 tid;
 391
 392
 393         //TO2DS and QoS
 394         if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 395           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header;
 396           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 397           tid = UP2AC(tid);
 398           tid ++;
 399         } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
 400           hdr_3addrqos = (struct ieee80211_hdr_3addrqos*)header;
 401           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 402           tid = UP2AC(tid);
 403           tid ++;
 404         } else { // no QoS
 405           tid = 0;
 406         }
 407
 408         switch (ieee->iw_mode) {
 409         case IW_MODE_ADHOC:
 410         {
 411                 struct list_head *p;
 412                 struct ieee_ibss_seq *entry = NULL;
 413                 u8 *mac = header->addr2;
 414                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 415                 //for (pos = (head)->next; pos != (head); pos = pos->next)
 416                 //__list_for_each(p, &ieee->ibss_mac_hash[index]) {
 417                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 418                         entry = list_entry(p, struct ieee_ibss_seq, list);
 419                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 420                                 break;
 421                 }
 422         //      if (memcmp(entry->mac, mac, ETH_ALEN)){
 423                 if (p == &ieee->ibss_mac_hash[index]) {
 424                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 425                         if (!entry) {
 426                                 printk(KERN_WARNING "Cannot malloc new mac entry\n");
 427                                 return 0;
 428                         }
 429                         memcpy(entry->mac, mac, ETH_ALEN);
 430                         entry->seq_num[tid] = seq;
 431                         entry->frag_num[tid] = frag;
 432                         entry->packet_time[tid] = jiffies;
 433                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 434                         return 0;
 435                 }
 436                 last_seq = &entry->seq_num[tid];
 437                 last_frag = &entry->frag_num[tid];
 438                 last_time = &entry->packet_time[tid];
 439                 break;
 440         }
 441
 442         case IW_MODE_INFRA:
 443                 last_seq = &ieee->last_rxseq_num[tid];
 444                 last_frag = &ieee->last_rxfrag_num[tid];
 445                 last_time = &ieee->last_packet_time[tid];
 446
 447                 break;
 448         default:
 449                 return 0;
 450         }
 451
 452 //      if(tid != 0) {
 453 //              printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
 454 //      }
 455         if ((*last_seq == seq) &&
 456             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 457                 if (*last_frag == frag){
 458                         //printk(KERN_WARNING "[1] go drop!\n");
 459                         goto drop;
 460
 461                 }
 462                 if (*last_frag + 1 != frag)
 463                         /* out-of-order fragment */
 464                         //printk(KERN_WARNING "[2] go drop!\n");
 465                         goto drop;
 466         } else
 467                 *last_seq = seq;
 468
 469         *last_frag = frag;
 470         *last_time = jiffies;
 471         return 0;
 472
 473 drop:
 474 //      BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
 475 //      printk("DUP\n");
 476
 477         return 1;
 478 }
 479 bool
 480 AddReorderEntry(
 481         PRX_TS_RECORD                   pTS,
 482         PRX_REORDER_ENTRY               pReorderEntry
 483         )
 484 {
 485         struct list_head *pList = &pTS->RxPendingPktList;
 486 #if  1
 487         while(pList->next != &pTS->RxPendingPktList)
 488         {
 489                 if( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 490                 {
 491                         pList = pList->next;
 492                 }
 493                 else if( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 494                 {
 495                         return false;
 496                 }
 497                 else
 498                 {
 499                         break;
 500                 }
 501         }
 502 #endif
 503         pReorderEntry->List.next = pList->next;
 504         pReorderEntry->List.next->prev = &pReorderEntry->List;
 505         pReorderEntry->List.prev = pList;
 506         pList->next = &pReorderEntry->List;
 507
 508         return true;
 509 }
 510
 511 void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb** prxbIndicateArray,u8  index)
 512 {
 513         u8 i = 0 , j=0;
 514         u16 ethertype;
 515 //      if(index > 1)
 516 //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__FUNCTION__,index);
 517         for(j = 0; j<index; j++)
 518         {
 519 //added by amy for reorder
 520                 struct ieee80211_rxb* prxb = prxbIndicateArray[j];
 521                 for(i = 0; i<prxb->nr_subframes; i++) {
 522                         struct sk_buff *sub_skb = prxb->subframes[i];
 523
 524                 /* convert hdr + possible LLC headers into Ethernet header */
 525                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 526                         if (sub_skb->len >= 8 &&
 527                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
 528                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 529                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 530                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
 531                          * replace EtherType */
 532                                 skb_pull(sub_skb, SNAP_SIZE);
 533                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 534                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 535                         } else {
 536                                 u16 len;
 537                         /* Leave Ethernet header part of hdr and full payload */
 538                                 len = htons(sub_skb->len);
 539                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 540                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 541                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 542                         }
 543                         //stats->rx_packets++;
 544                         //stats->rx_bytes += sub_skb->len;
 545
 546                 /* Indicat the packets to upper layer */
 547                         if (sub_skb) {
 548                                 //printk("0skb_len(%d)\n", skb->len);
 549                                 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
 550                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 551                                 sub_skb->dev = ieee->dev;
 552                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 553                                 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
 554                                 ieee->last_rx_ps_time = jiffies;
 555                                 //printk("1skb_len(%d)\n", skb->len);
 556                                 netif_rx(sub_skb);
 557                         }
 558                 }
 559                 kfree(prxb);
 560                 prxb = NULL;
 561         }
 562 }
 563
 564
 565 void RxReorderIndicatePacket( struct ieee80211_device *ieee,
 566                 struct ieee80211_rxb* prxb,
 567                 PRX_TS_RECORD           pTS,
 568                 u16                     SeqNum)
 569 {
 570         PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
 571         PRX_REORDER_ENTRY       pReorderEntry = NULL;
 572         struct ieee80211_rxb* prxbIndicateArray[REORDER_WIN_SIZE];
 573         u8                      WinSize = pHTInfo->RxReorderWinSize;
 574         u16                     WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
 575         u8                      index = 0;
 576         bool                    bMatchWinStart = false, bPktInBuf = false;
 577         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__FUNCTION__,SeqNum,pTS->RxIndicateSeq,WinSize);
 578         /* Rx Reorder initialize condition.*/
 579         if(pTS->RxIndicateSeq == 0xffff) {
 580                 pTS->RxIndicateSeq = SeqNum;
 581         }
 582
 583         /* Drop out the packet which SeqNum is smaller than WinStart */
 584         if(SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 585                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 586                                  pTS->RxIndicateSeq, SeqNum);
 587                 pHTInfo->RxReorderDropCounter++;
 588                 {
 589                         int i;
 590                         for(i =0; i < prxb->nr_subframes; i++) {
 591                                 dev_kfree_skb(prxb->subframes[i]);
 592                         }
 593                         kfree(prxb);
 594                         prxb = NULL;
 595                 }
 596                 return;
 597         }
 598
 599         /*
 600          * Sliding window manipulation. Conditions includes:
 601          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 602          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 603          */
 604         if(SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 605                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 606                 bMatchWinStart = true;
 607         } else if(SN_LESS(WinEnd, SeqNum)) {
 608                 if(SeqNum >= (WinSize - 1)) {
 609                         pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
 610                 } else {
 611                         pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
 612                 }
 613                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 614         }
 615
 616         /*
 617          * Indication process.
 618          * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
 619          * with the SeqNum smaller than latest WinStart and buffer other packets.
 620          */
 621         /* For Rx Reorder condition:
 622          * 1. All packets with SeqNum smaller than WinStart => Indicate
 623          * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
 624          */
 625         if(bMatchWinStart) {
 626                 /* Current packet is going to be indicated.*/
 627                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
 628                                 pTS->RxIndicateSeq, SeqNum);
 629                 prxbIndicateArray[0] = prxb;
 630 //              printk("========================>%s(): SeqNum is %d\n",__FUNCTION__,SeqNum);
 631                 index = 1;
 632         } else {
 633                 /* Current packet is going to be inserted into pending list.*/
 634                 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to orderd list\n",__FUNCTION__);
 635                 if(!list_empty(&ieee->RxReorder_Unused_List)) {
 636                         pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List);
 637                         list_del_init(&pReorderEntry->List);
 638
 639                         /* Make a reorder entry and insert into a the packet list.*/
 640                         pReorderEntry->SeqNum = SeqNum;
 641                         pReorderEntry->prxb = prxb;
 642         //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);
 643
 644 #if 1
 645                         if(!AddReorderEntry(pTS, pReorderEntry)) {
 646                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
 647                                         __FUNCTION__, pTS->RxIndicateSeq, SeqNum);
 648                                 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 649                                 {
 650                                         int i;
 651                                         for(i =0; i < prxb->nr_subframes; i++) {
 652                                                 dev_kfree_skb(prxb->subframes[i]);
 653                                         }
 654                                         kfree(prxb);
 655                                         prxb = NULL;
 656                                 }
 657                         } else {
 658                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,
 659                                          "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 660                         }
 661 #endif
 662                 }
 663                 else {
 664                         /*
 665                          * Packets are dropped if there is not enough reorder entries.
 666                          * This part shall be modified!! We can just indicate all the
 667                          * packets in buffer and get reorder entries.
 668                          */
 669                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
 670                         {
 671                                 int i;
 672                                 for(i =0; i < prxb->nr_subframes; i++) {
 673                                         dev_kfree_skb(prxb->subframes[i]);
 674                                 }
 675                                 kfree(prxb);
 676                                 prxb = NULL;
 677                         }
 678                 }
 679         }
 680
 681         /* Check if there is any packet need indicate.*/
 682         while(!list_empty(&pTS->RxPendingPktList)) {
 683                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): start RREORDER indicate\n",__FUNCTION__);
 684 #if 1
 685                 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List);
 686                 if( SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 687                                 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 688                 {
 689                         /* This protect buffer from overflow. */
 690                         if(index >= REORDER_WIN_SIZE) {
 691                                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
 692                                 bPktInBuf = true;
 693                                 break;
 694                         }
 695
 696                         list_del_init(&pReorderEntry->List);
 697
 698                         if(SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 699                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 700
 701                         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packets indication!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 702                         prxbIndicateArray[index] = pReorderEntry->prxb;
 703                 //      printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);
 704                         index++;
 705
 706                         list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 707                 } else {
 708                         bPktInBuf = true;
 709                         break;
 710                 }
 711 #endif
 712         }
 713
 714         /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
 715         if(index>0) {
 716                 // Cancel previous pending timer.
 717                 if(timer_pending(&pTS->RxPktPendingTimer))
 718                 {
 719                         del_timer_sync(&pTS->RxPktPendingTimer);
 720                 }
 721         //      del_timer_sync(&pTS->RxPktPendingTimer);
 722                 pTS->RxTimeoutIndicateSeq = 0xffff;
 723
 724                 // Indicate packets
 725                 if(index>REORDER_WIN_SIZE){
 726                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer buffer full!! \n");
 727                         return;
 728                 }
 729                 ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
 730                 bPktInBuf = false;
 731         }
 732
 733 #if 1
 734         if(bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
 735                 // Set new pending timer.
 736                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): SET rx timeout timer\n", __FUNCTION__);
 737                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 738                 mod_timer(&pTS->RxPktPendingTimer,  jiffies + MSECS(pHTInfo->RxReorderPendingTime));
 739         }
 740 #endif
 741 }
 742
 743 u8 parse_subframe(struct sk_buff *skb,
 744                   struct ieee80211_rx_stats *rx_stats,
 745                   struct ieee80211_rxb *rxb,u8* src,u8* dst)
 746 {
 747         struct ieee80211_hdr_3addr  *hdr = (struct ieee80211_hdr_3addr* )skb->data;
 748         u16             fc = le16_to_cpu(hdr->frame_ctl);
 749
 750         u16             LLCOffset= sizeof(struct ieee80211_hdr_3addr);
 751         u16             ChkLength;
 752         bool            bIsAggregateFrame = false;
 753         u16             nSubframe_Length;
 754         u8              nPadding_Length = 0;
 755         u16             SeqNum=0;
 756
 757         struct sk_buff *sub_skb;
 758         u8             *data_ptr;
 759         /* just for debug purpose */
 760         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 761
 762         if((IEEE80211_QOS_HAS_SEQ(fc))&&\
 763                         (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
 764                 bIsAggregateFrame = true;
 765         }
 766
 767         if(IEEE80211_QOS_HAS_SEQ(fc)) {
 768                 LLCOffset += 2;
 769         }
 770
 771         if(rx_stats->bContainHTC) {
 772                 LLCOffset += sHTCLng;
 773         }
 774         //printk("ChkLength = %d\n", LLCOffset);
 775         // Null packet, don't indicate it to upper layer
 776         ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
 777
 778         if( skb->len <= ChkLength ) {
 779                 return 0;
 780         }
 781
 782         skb_pull(skb, LLCOffset);
 783
 784         if(!bIsAggregateFrame) {
 785                 rxb->nr_subframes = 1;
 786 #ifdef JOHN_NOCPY
 787                 rxb->subframes[0] = skb;
 788 #else
 789                 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
 790 #endif
 791
 792                 memcpy(rxb->src,src,ETH_ALEN);
 793                 memcpy(rxb->dst,dst,ETH_ALEN);
 794                 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
 795                 return 1;
 796         } else {
 797                 rxb->nr_subframes = 0;
 798                 memcpy(rxb->src,src,ETH_ALEN);
 799                 memcpy(rxb->dst,dst,ETH_ALEN);
 800                 while(skb->len > ETHERNET_HEADER_SIZE) {
 801                         /* Offset 12 denote 2 mac address */
 802                         nSubframe_Length = *((u16*)(skb->data + 12));
 803                         //==m==>change the length order
 804                         nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
 805
 806                         if(skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 807                                 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
 808                                                 __FUNCTION__,rxb->nr_subframes);
 809                                 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__FUNCTION__, nSubframe_Length);
 810                                 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
 811                                 printk("The Packet SeqNum is %d\n",SeqNum);
 812                                 return 0;
 813                         }
 814
 815                         /* move the data point to data content */
 816                         skb_pull(skb, ETHERNET_HEADER_SIZE);
 817
 818 #ifdef JOHN_NOCPY
 819                         sub_skb = skb_clone(skb, GFP_ATOMIC);
 820                         sub_skb->len = nSubframe_Length;
 821                         sub_skb->tail = sub_skb->data + nSubframe_Length;
 822 #else
 823                         /* Allocate new skb for releasing to upper layer */
 824                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 825                         skb_reserve(sub_skb, 12);
 826                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
 827                         memcpy(data_ptr,skb->data,nSubframe_Length);
 828 #endif
 829                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
 830                         if(rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 831                                 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
 832                                 break;
 833                         }
 834                         skb_pull(skb,nSubframe_Length);
 835
 836                         if(skb->len != 0) {
 837                                 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
 838                                 if(nPadding_Length == 4) {
 839                                         nPadding_Length = 0;
 840                                 }
 841
 842                                 if(skb->len < nPadding_Length) {
 843                                         return 0;
 844                                 }
 845
 846                                 skb_pull(skb,nPadding_Length);
 847                         }
 848                 }
 849 #ifdef JOHN_NOCPY
 850                 dev_kfree_skb(skb);
 851 #endif
 852                 //{just for debug added by david
 853                 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
 854                 //}
 855                 return rxb->nr_subframes;
 856         }
 857 }
 858
 859 /* All received frames are sent to this function. @skb contains the frame in
 860  * IEEE 802.11 format, i.e., in the format it was sent over air.
 861  * This function is called only as a tasklet (software IRQ). */
 862 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 863                  struct ieee80211_rx_stats *rx_stats)
 864 {
 865         struct net_device *dev = ieee->dev;
 866         struct ieee80211_hdr_4addr *hdr;
 867         //struct ieee80211_hdr_3addrqos *hdr;
 868
 869         size_t hdrlen;
 870         u16 fc, type, stype, sc;
 871         struct net_device_stats *stats;
 872         unsigned int frag;
 873         u8 *payload;
 874         u16 ethertype;
 875         //added by amy for reorder
 876         u8      TID = 0;
 877         u16     SeqNum = 0;
 878         PRX_TS_RECORD pTS = NULL;
 879         //bool bIsAggregateFrame = false;
 880         //added by amy for reorder
 881 //      u16 qos_ctl = 0;
 882         u8 dst[ETH_ALEN];
 883         u8 src[ETH_ALEN];
 884         u8 bssid[ETH_ALEN];
 885         struct ieee80211_crypt_data *crypt = NULL;
 886         int keyidx = 0;
 887
 888         int i;
 889         struct ieee80211_rxb* rxb = NULL;
 890         // cheat the the hdr type
 891         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 892         stats = &ieee->stats;
 893
 894         if (skb->len < 10) {
 895                 printk(KERN_INFO "%s: SKB length < 10\n",
 896                        dev->name);
 897                 goto rx_dropped;
 898         }
 899
 900         fc = le16_to_cpu(hdr->frame_ctl);
 901         type = WLAN_FC_GET_TYPE(fc);
 902         stype = WLAN_FC_GET_STYPE(fc);
 903         sc = le16_to_cpu(hdr->seq_ctl);
 904
 905         frag = WLAN_GET_SEQ_FRAG(sc);
 906         hdrlen = ieee80211_get_hdrlen(fc);
 907
 908         if(HTCCheck(ieee, skb->data))
 909         {
 910                 if(net_ratelimit())
 911                 printk("find HTCControl\n");
 912                 hdrlen += 4;
 913                 rx_stats->bContainHTC = 1;
 914         }
 915
 916         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
 917
 918         if (ieee->iw_mode == IW_MODE_MONITOR) {
 919                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 920                 stats->rx_packets++;
 921                 stats->rx_bytes += skb->len;
 922                 return 1;
 923         }
 924
 925         if (ieee->host_decrypt) {
 926                 int idx = 0;
 927                 if (skb->len >= hdrlen + 3)
 928                         idx = skb->data[hdrlen + 3] >> 6;
 929                 crypt = ieee->crypt[idx];
 930
 931                 /* allow NULL decrypt to indicate an station specific override
 932                  * for default encryption */
 933                 if (crypt && (crypt->ops == NULL ||
 934                               crypt->ops->decrypt_mpdu == NULL))
 935                         crypt = NULL;
 936
 937                 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
 938                         /* This seems to be triggered by some (multicast?)
 939                          * frames from other than current BSS, so just drop the
 940                          * frames silently instead of filling system log with
 941                          * these reports. */
 942                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 943                                              " (SA=" MAC_FMT ")\n",
 944                                              MAC_ARG(hdr->addr2));
 945                         ieee->ieee_stats.rx_discards_undecryptable++;
 946                         goto rx_dropped;
 947                 }
 948         }
 949
 950         if (skb->len < IEEE80211_DATA_HDR3_LEN)
 951                 goto rx_dropped;
 952
 953         // if QoS enabled, should check the sequence for each of the AC
 954         if( (ieee->pHTInfo->bCurRxReorderEnable == false) || !ieee->current_network.qos_data.active|| !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)){
 955                 if (is_duplicate_packet(ieee, hdr))
 956                 goto rx_dropped;
 957
 958         }
 959         else
 960         {
 961                 PRX_TS_RECORD pRxTS = NULL;
 962                         //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__FUNCTION__, tid);
 963 #if 1
 964                 if(GetTs(
 965                                 ieee,
 966                                 (PTS_COMMON_INFO*) &pRxTS,
 967                                 hdr->addr2,
 968                                 (u8)Frame_QoSTID((u8*)(skb->data)),
 969                                 RX_DIR,
 970                                 true))
 971                 {
 972
 973                 //      IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->RxLastFragNum is %d,frag is %d,pRxTS->RxLastSeqNum is %d,seq is %d\n",__FUNCTION__,pRxTS->RxLastFragNum,frag,pRxTS->RxLastSeqNum,WLAN_GET_SEQ_SEQ(sc));
 974                         if(     (fc & (1<<11))  &&
 975                                         (frag == pRxTS->RxLastFragNum) &&
 976                                         (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)   )
 977                         {
 978                                 goto rx_dropped;
 979                         }
 980                         else
 981                         {
 982                                 pRxTS->RxLastFragNum = frag;
 983                                 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
 984                         }
 985                 }
 986                 else
 987                 {
 988                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n",__FUNCTION__);
 989                         goto rx_dropped;
 990                 }
 991         }
 992 #endif
 993         if (type == IEEE80211_FTYPE_MGMT) {
 994
 995         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
 996                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 997                         goto rx_dropped;
 998                 else
 999                         goto rx_exit;
1000         }
1001
1002         /* Data frame - extract src/dst addresses */
1003         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1004         case IEEE80211_FCTL_FROMDS:
1005                 memcpy(dst, hdr->addr1, ETH_ALEN);
1006                 memcpy(src, hdr->addr3, ETH_ALEN);
1007                 memcpy(bssid, hdr->addr2, ETH_ALEN);
1008                 break;
1009         case IEEE80211_FCTL_TODS:
1010                 memcpy(dst, hdr->addr3, ETH_ALEN);
1011                 memcpy(src, hdr->addr2, ETH_ALEN);
1012                 memcpy(bssid, hdr->addr1, ETH_ALEN);
1013                 break;
1014         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1015                 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1016                         goto rx_dropped;
1017                 memcpy(dst, hdr->addr3, ETH_ALEN);
1018                 memcpy(src, hdr->addr4, ETH_ALEN);
1019                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1020                 break;
1021         case 0:
1022                 memcpy(dst, hdr->addr1, ETH_ALEN);
1023                 memcpy(src, hdr->addr2, ETH_ALEN);
1024                 memcpy(bssid, hdr->addr3, ETH_ALEN);
1025                 break;
1026         }
1027
1028
1029         dev->last_rx = jiffies;
1030
1031         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1032         /* Nullfunc frames may have PS-bit set, so they must be passed to
1033          * hostap_handle_sta_rx() before being dropped here. */
1034         if (stype != IEEE80211_STYPE_DATA &&
1035             stype != IEEE80211_STYPE_DATA_CFACK &&
1036             stype != IEEE80211_STYPE_DATA_CFPOLL &&
1037             stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
1038             stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1039             ) {
1040                 if (stype != IEEE80211_STYPE_NULLFUNC)
1041                         IEEE80211_DEBUG_DROP(
1042                                 "RX: dropped data frame "
1043                                 "with no data (type=0x%02x, "
1044                                 "subtype=0x%02x, len=%d)\n",
1045                                 type, stype, skb->len);
1046                 goto rx_dropped;
1047         }
1048         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1049                 goto rx_dropped;
1050
1051         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1052
1053         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1054             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
1055         {
1056                 printk("decrypt frame error\n");
1057                 goto rx_dropped;
1058         }
1059
1060
1061         hdr = (struct ieee80211_hdr_4addr *) skb->data;
1062
1063         /* skb: hdr + (possibly fragmented) plaintext payload */
1064         // PR: FIXME: hostap has additional conditions in the "if" below:
1065         // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1066         if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1067                 int flen;
1068                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1069                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1070
1071                 if (!frag_skb) {
1072                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1073                                         "Rx cannot get skb from fragment "
1074                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1075                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1076                                         WLAN_GET_SEQ_SEQ(sc), frag);
1077                         goto rx_dropped;
1078                 }
1079                 flen = skb->len;
1080                 if (frag != 0)
1081                         flen -= hdrlen;
1082
1083                 if (frag_skb->tail + flen > frag_skb->end) {
1084                         printk(KERN_WARNING "%s: host decrypted and "
1085                                "reassembled frame did not fit skb\n",
1086                                dev->name);
1087                         ieee80211_frag_cache_invalidate(ieee, hdr);
1088                         goto rx_dropped;
1089                 }
1090
1091                 if (frag == 0) {
1092                         /* copy first fragment (including full headers) into
1093                          * beginning of the fragment cache skb */
1094                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1095                 } else {
1096                         /* append frame payload to the end of the fragment
1097                          * cache skb */
1098                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1099                                flen);
1100                 }
1101                 dev_kfree_skb_any(skb);
1102                 skb = NULL;
1103
1104                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1105                         /* more fragments expected - leave the skb in fragment
1106                          * cache for now; it will be delivered to upper layers
1107                          * after all fragments have been received */
1108                         goto rx_exit;
1109                 }
1110
1111                 /* this was the last fragment and the frame will be
1112                  * delivered, so remove skb from fragment cache */
1113                 skb = frag_skb;
1114                 hdr = (struct ieee80211_hdr_4addr *) skb->data;
1115                 ieee80211_frag_cache_invalidate(ieee, hdr);
1116         }
1117
1118         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1119          * encrypted/authenticated */
1120         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1121             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1122         {
1123                 printk("==>decrypt msdu error\n");
1124                 goto rx_dropped;
1125         }
1126
1127         //added by amy for AP roaming
1128         ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1129         ieee->LinkDetectInfo.NumRxOkInPeriod++;
1130
1131         hdr = (struct ieee80211_hdr_4addr *) skb->data;
1132         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1133                 if (/*ieee->ieee802_1x &&*/
1134                     ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1135
1136 #ifdef CONFIG_IEEE80211_DEBUG
1137                         /* pass unencrypted EAPOL frames even if encryption is
1138                          * configured */
1139                         struct eapol *eap = (struct eapol *)(skb->data +
1140                                 24);
1141                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1142                                                 eap_get_type(eap->type));
1143 #endif
1144                 } else {
1145                         IEEE80211_DEBUG_DROP(
1146                                 "encryption configured, but RX "
1147                                 "frame not encrypted (SA=" MAC_FMT ")\n",
1148                                 MAC_ARG(hdr->addr2));
1149                         goto rx_dropped;
1150                 }
1151         }
1152
1153 #ifdef CONFIG_IEEE80211_DEBUG
1154         if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1155             ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1156                         struct eapol *eap = (struct eapol *)(skb->data +
1157                                 24);
1158                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1159                                                 eap_get_type(eap->type));
1160         }
1161 #endif
1162
1163         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1164             !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1165                 IEEE80211_DEBUG_DROP(
1166                         "dropped unencrypted RX data "
1167                         "frame from " MAC_FMT
1168                         " (drop_unencrypted=1)\n",
1169                         MAC_ARG(hdr->addr2));
1170                 goto rx_dropped;
1171         }
1172 /*
1173         if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1174                 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1175         }
1176 */
1177 //added by amy for reorder
1178 #if 1
1179         if(ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1180                 && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1))
1181         {
1182                 TID = Frame_QoSTID(skb->data);
1183                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1184                 GetTs(ieee,(PTS_COMMON_INFO*) &pTS,hdr->addr2,TID,RX_DIR,true);
1185                 if(TID !=0 && TID !=3)
1186                 {
1187                         ieee->bis_any_nonbepkts = true;
1188                 }
1189         }
1190 #endif
1191 //added by amy for reorder
1192         /* skb: hdr + (possible reassembled) full plaintext payload */
1193         payload = skb->data + hdrlen;
1194         //ethertype = (payload[6] << 8) | payload[7];
1195         rxb = (struct ieee80211_rxb*)kmalloc(sizeof(struct ieee80211_rxb),GFP_ATOMIC);
1196         if(rxb == NULL)
1197         {
1198                 IEEE80211_DEBUG(IEEE80211_DL_ERR,"%s(): kmalloc rxb error\n",__FUNCTION__);
1199                 goto rx_dropped;
1200         }
1201         /* to parse amsdu packets */
1202         /* qos data packets & reserved bit is 1 */
1203         if(parse_subframe(skb,rx_stats,rxb,src,dst) == 0) {
1204                 /* only to free rxb, and not submit the packets to upper layer */
1205                 for(i =0; i < rxb->nr_subframes; i++) {
1206                         dev_kfree_skb(rxb->subframes[i]);
1207                 }
1208                 kfree(rxb);
1209                 rxb = NULL;
1210                 goto rx_dropped;
1211         }
1212
1213         ieee->last_rx_ps_time = jiffies;
1214 //added by amy for reorder
1215         if(ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL){
1216 //added by amy for reorder
1217                 for(i = 0; i<rxb->nr_subframes; i++) {
1218                         struct sk_buff *sub_skb = rxb->subframes[i];
1219
1220                         if (sub_skb) {
1221                                 /* convert hdr + possible LLC headers into Ethernet header */
1222                                 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1223                                 if (sub_skb->len >= 8 &&
1224                                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1225                                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1226                                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1227                                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
1228                                          * replace EtherType */
1229                                         skb_pull(sub_skb, SNAP_SIZE);
1230                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1231                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1232                                 } else {
1233                                         u16 len;
1234                                         /* Leave Ethernet header part of hdr and full payload */
1235                                         len = htons(sub_skb->len);
1236                                         memcpy(skb_push(sub_skb, 2), &len, 2);
1237                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1238                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1239                                 }
1240
1241                                 stats->rx_packets++;
1242                                 stats->rx_bytes += sub_skb->len;
1243                                 if(is_multicast_ether_addr(dst)) {
1244                                         stats->multicast++;
1245                                 }
1246
1247                                 /* Indicat the packets to upper layer */
1248                                 //printk("0skb_len(%d)\n", skb->len);
1249                                 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1250                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1251                                 sub_skb->dev = dev;
1252                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1253                                 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
1254                                 //printk("1skb_len(%d)\n", skb->len);
1255                                 netif_rx(sub_skb);
1256                         }
1257                 }
1258                 kfree(rxb);
1259                 rxb = NULL;
1260
1261         }
1262         else
1263         {
1264                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__FUNCTION__);
1265                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1266         }
1267 #ifndef JOHN_NOCPY
1268         dev_kfree_skb(skb);
1269 #endif
1270
1271  rx_exit:
1272         return 1;
1273
1274  rx_dropped:
1275         if (rxb != NULL)
1276         {
1277                 kfree(rxb);
1278                 rxb = NULL;
1279         }
1280         stats->rx_dropped++;
1281
1282         /* Returning 0 indicates to caller that we have not handled the SKB--
1283          * so it is still allocated and can be used again by underlying
1284          * hardware as a DMA target */
1285         return 0;
1286 }
1287
1288 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
1289
1290 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1291
1292 /*
1293 * Make ther structure we read from the beacon packet has
1294 * the right values
1295 */
1296 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1297                                      *info_element, int sub_type)
1298 {
1299
1300         if (info_element->qui_subtype != sub_type)
1301                 return -1;
1302         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1303                 return -1;
1304         if (info_element->qui_type != QOS_OUI_TYPE)
1305                 return -1;
1306         if (info_element->version != QOS_VERSION_1)
1307                 return -1;
1308
1309         return 0;
1310 }
1311
1312
1313 /*
1314  * Parse a QoS parameter element
1315  */
1316 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
1317                                             *element_param, struct ieee80211_info_element
1318                                             *info_element)
1319 {
1320         int ret = 0;
1321         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
1322
1323         if ((info_element == NULL) || (element_param == NULL))
1324                 return -1;
1325
1326         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1327                 memcpy(element_param->info_element.qui, info_element->data,
1328                        info_element->len);
1329                 element_param->info_element.elementID = info_element->id;
1330                 element_param->info_element.length = info_element->len;
1331         } else
1332                 ret = -1;
1333         if (ret == 0)
1334                 ret = ieee80211_verify_qos_info(&element_param->info_element,
1335                                                 QOS_OUI_PARAM_SUB_TYPE);
1336         return ret;
1337 }
1338
1339 /*
1340  * Parse a QoS information element
1341  */
1342 static int ieee80211_read_qos_info_element(struct
1343                                            ieee80211_qos_information_element
1344                                            *element_info, struct ieee80211_info_element
1345                                            *info_element)
1346 {
1347         int ret = 0;
1348         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1349
1350         if (element_info == NULL)
1351                 return -1;
1352         if (info_element == NULL)
1353                 return -1;
1354
1355         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1356                 memcpy(element_info->qui, info_element->data,
1357                        info_element->len);
1358                 element_info->elementID = info_element->id;
1359                 element_info->length = info_element->len;
1360         } else
1361                 ret = -1;
1362
1363         if (ret == 0)
1364                 ret = ieee80211_verify_qos_info(element_info,
1365                                                 QOS_OUI_INFO_SUB_TYPE);
1366         return ret;
1367 }
1368
1369
1370 /*
1371  * Write QoS parameters from the ac parameters.
1372  */
1373 static int ieee80211_qos_convert_ac_to_parameters(struct
1374                                                   ieee80211_qos_parameter_info
1375                                                   *param_elm, struct
1376                                                   ieee80211_qos_parameters
1377                                                   *qos_param)
1378 {
1379         int rc = 0;
1380         int i;
1381         struct ieee80211_qos_ac_parameter *ac_params;
1382         u8 aci;
1383         //u8 cw_min;
1384         //u8 cw_max;
1385
1386         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1387                 ac_params = &(param_elm->ac_params_record[i]);
1388
1389                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1390
1391                 if(aci >= QOS_QUEUE_NUM)
1392                         continue;
1393                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1394
1395                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1396                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1397
1398                 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1399
1400                 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1401
1402                 qos_param->flag[aci] =
1403                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1404                 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1405         }
1406         return rc;
1407 }
1408
1409 /*
1410  * we have a generic data element which it may contain QoS information or
1411  * parameters element. check the information element length to decide
1412  * which type to read
1413  */
1414 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1415                                              *info_element,
1416                                              struct ieee80211_network *network)
1417 {
1418         int rc = 0;
1419         struct ieee80211_qos_parameters *qos_param = NULL;
1420         struct ieee80211_qos_information_element qos_info_element;
1421
1422         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1423
1424         if (rc == 0) {
1425                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1426                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1427         } else {
1428                 struct ieee80211_qos_parameter_info param_element;
1429
1430                 rc = ieee80211_read_qos_param_element(&param_element,
1431                                                       info_element);
1432                 if (rc == 0) {
1433                         qos_param = &(network->qos_data.parameters);
1434                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1435                                                                qos_param);
1436                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1437                         network->qos_data.param_count =
1438                             param_element.info_element.ac_info & 0x0F;
1439                 }
1440         }
1441
1442         if (rc == 0) {
1443                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1444                 network->qos_data.supported = 1;
1445         }
1446         return rc;
1447 }
1448
1449 #ifdef CONFIG_IEEE80211_DEBUG
1450 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1451
1452 static const char *get_info_element_string(u16 id)
1453 {
1454         switch (id) {
1455                 MFIE_STRING(SSID);
1456                 MFIE_STRING(RATES);
1457                 MFIE_STRING(FH_SET);
1458                 MFIE_STRING(DS_SET);
1459                 MFIE_STRING(CF_SET);
1460                 MFIE_STRING(TIM);
1461                 MFIE_STRING(IBSS_SET);
1462                 MFIE_STRING(COUNTRY);
1463                 MFIE_STRING(HOP_PARAMS);
1464                 MFIE_STRING(HOP_TABLE);
1465                 MFIE_STRING(REQUEST);
1466                 MFIE_STRING(CHALLENGE);
1467                 MFIE_STRING(POWER_CONSTRAINT);
1468                 MFIE_STRING(POWER_CAPABILITY);
1469                 MFIE_STRING(TPC_REQUEST);
1470                 MFIE_STRING(TPC_REPORT);
1471                 MFIE_STRING(SUPP_CHANNELS);
1472                 MFIE_STRING(CSA);
1473                 MFIE_STRING(MEASURE_REQUEST);
1474                 MFIE_STRING(MEASURE_REPORT);
1475                 MFIE_STRING(QUIET);
1476                 MFIE_STRING(IBSS_DFS);
1477                // MFIE_STRING(ERP_INFO);
1478                 MFIE_STRING(RSN);
1479                 MFIE_STRING(RATES_EX);
1480                 MFIE_STRING(GENERIC);
1481                 MFIE_STRING(QOS_PARAMETER);
1482         default:
1483                 return "UNKNOWN";
1484         }
1485 }
1486 #endif
1487
1488 static inline void ieee80211_extract_country_ie(
1489         struct ieee80211_device *ieee,
1490         struct ieee80211_info_element *info_element,
1491         struct ieee80211_network *network,
1492         u8 * addr2
1493 )
1494 {
1495         if(IS_DOT11D_ENABLE(ieee))
1496         {
1497                 if(info_element->len!= 0)
1498                 {
1499                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1500                         network->CountryIeLen = info_element->len;
1501
1502                         if(!IS_COUNTRY_IE_VALID(ieee))
1503                         {
1504                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1505                         }
1506                 }
1507
1508                 //
1509                 // 070305, rcnjko: I update country IE watch dog here because
1510                 // some AP (e.g. Cisco 1242) don't include country IE in their
1511                 // probe response frame.
1512                 //
1513                 if(IS_EQUAL_CIE_SRC(ieee, addr2) )
1514                 {
1515                         UPDATE_CIE_WATCHDOG(ieee);
1516                 }
1517         }
1518
1519 }
1520
1521 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1522                 struct ieee80211_info_element *info_element,
1523                 u16 length,
1524                 struct ieee80211_network *network,
1525                 struct ieee80211_rx_stats *stats)
1526 {
1527         u8 i;
1528         short offset;
1529         u16     tmp_htcap_len=0;
1530         u16     tmp_htinfo_len=0;
1531         u16 ht_realtek_agg_len=0;
1532         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1533 //      u16 broadcom_len = 0;
1534 #ifdef CONFIG_IEEE80211_DEBUG
1535         char rates_str[64];
1536         char *p;
1537 #endif
1538
1539         while (length >= sizeof(*info_element)) {
1540                 if (sizeof(*info_element) + info_element->len > length) {
1541                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1542                                              "info_element->len + 2 > left : "
1543                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1544                                              info_element->len +
1545                                              sizeof(*info_element),
1546                                              length, info_element->id);
1547                         /* We stop processing but don't return an error here
1548                          * because some misbehaviour APs break this rule. ie.
1549                          * Orinoco AP1000. */
1550                         break;
1551                 }
1552
1553                 switch (info_element->id) {
1554                 case MFIE_TYPE_SSID:
1555                         if (ieee80211_is_empty_essid(info_element->data,
1556                                                      info_element->len)) {
1557                                 network->flags |= NETWORK_EMPTY_ESSID;
1558                                 break;
1559                         }
1560
1561                         network->ssid_len = min(info_element->len,
1562                                                 (u8) IW_ESSID_MAX_SIZE);
1563                         memcpy(network->ssid, info_element->data, network->ssid_len);
1564                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1565                                 memset(network->ssid + network->ssid_len, 0,
1566                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1567
1568                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1569                                              network->ssid, network->ssid_len);
1570                         break;
1571
1572                 case MFIE_TYPE_RATES:
1573 #ifdef CONFIG_IEEE80211_DEBUG
1574                         p = rates_str;
1575 #endif
1576                         network->rates_len = min(info_element->len,
1577                                                  MAX_RATES_LENGTH);
1578                         for (i = 0; i < network->rates_len; i++) {
1579                                 network->rates[i] = info_element->data[i];
1580 #ifdef CONFIG_IEEE80211_DEBUG
1581                                 p += snprintf(p, sizeof(rates_str) -
1582                                               (p - rates_str), "%02X ",
1583                                               network->rates[i]);
1584 #endif
1585                                 if (ieee80211_is_ofdm_rate
1586                                     (info_element->data[i])) {
1587                                         network->flags |= NETWORK_HAS_OFDM;
1588                                         if (info_element->data[i] &
1589                                             IEEE80211_BASIC_RATE_MASK)
1590                                                 network->flags &=
1591                                                     ~NETWORK_HAS_CCK;
1592                                 }
1593                         }
1594
1595                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1596                                              rates_str, network->rates_len);
1597                         break;
1598
1599                 case MFIE_TYPE_RATES_EX:
1600 #ifdef CONFIG_IEEE80211_DEBUG
1601                         p = rates_str;
1602 #endif
1603                         network->rates_ex_len = min(info_element->len,
1604                                                     MAX_RATES_EX_LENGTH);
1605                         for (i = 0; i < network->rates_ex_len; i++) {
1606                                 network->rates_ex[i] = info_element->data[i];
1607 #ifdef CONFIG_IEEE80211_DEBUG
1608                                 p += snprintf(p, sizeof(rates_str) -
1609                                               (p - rates_str), "%02X ",
1610                                               network->rates[i]);
1611 #endif
1612                                 if (ieee80211_is_ofdm_rate
1613                                     (info_element->data[i])) {
1614                                         network->flags |= NETWORK_HAS_OFDM;
1615                                         if (info_element->data[i] &
1616                                             IEEE80211_BASIC_RATE_MASK)
1617                                                 network->flags &=
1618                                                     ~NETWORK_HAS_CCK;
1619                                 }
1620                         }
1621
1622                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1623                                              rates_str, network->rates_ex_len);
1624                         break;
1625
1626                 case MFIE_TYPE_DS_SET:
1627                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1628                                              info_element->data[0]);
1629                         network->channel = info_element->data[0];
1630                         break;
1631
1632                 case MFIE_TYPE_FH_SET:
1633                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1634                         break;
1635
1636                 case MFIE_TYPE_CF_SET:
1637                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1638                         break;
1639
1640                 case MFIE_TYPE_TIM:
1641                         if(info_element->len < 4)
1642                                 break;
1643
1644                         network->tim.tim_count = info_element->data[0];
1645                         network->tim.tim_period = info_element->data[1];
1646
1647                         network->dtim_period = info_element->data[1];
1648                         if(ieee->state != IEEE80211_LINKED)
1649                                 break;
1650                         //we use jiffies for legacy Power save
1651                         network->last_dtim_sta_time[0] = jiffies;
1652                         network->last_dtim_sta_time[1] = stats->mac_time[1];
1653
1654                         network->dtim_data = IEEE80211_DTIM_VALID;
1655
1656                         if(info_element->data[0] != 0)
1657                                 break;
1658
1659                         if(info_element->data[2] & 1)
1660                                 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1661
1662                         offset = (info_element->data[2] >> 1)*2;
1663
1664                         //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
1665
1666                         if(ieee->assoc_id < 8*offset ||
1667                                 ieee->assoc_id > 8*(offset + info_element->len -3))
1668
1669                                 break;
1670
1671                         offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1672
1673                         if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1674                                 network->dtim_data |= IEEE80211_DTIM_UCAST;
1675
1676                         //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1677                         break;
1678
1679                 case MFIE_TYPE_ERP:
1680                         network->erp_value = info_element->data[0];
1681                         network->flags |= NETWORK_HAS_ERP_VALUE;
1682                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1683                                              network->erp_value);
1684                         break;
1685                 case MFIE_TYPE_IBSS_SET:
1686                         network->atim_window = info_element->data[0];
1687                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1688                                              network->atim_window);
1689                         break;
1690
1691                 case MFIE_TYPE_CHALLENGE:
1692                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1693                         break;
1694
1695                 case MFIE_TYPE_GENERIC:
1696                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1697                                              info_element->len);
1698                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1699                                                                network))
1700                                 break;
1701
1702                         if (info_element->len >= 4 &&
1703                             info_element->data[0] == 0x00 &&
1704                             info_element->data[1] == 0x50 &&
1705                             info_element->data[2] == 0xf2 &&
1706                             info_element->data[3] == 0x01) {
1707                                 network->wpa_ie_len = min(info_element->len + 2,
1708                                                           MAX_WPA_IE_LEN);
1709                                 memcpy(network->wpa_ie, info_element,
1710                                        network->wpa_ie_len);
1711                                 break;
1712                         }
1713
1714                         if (info_element->len == 7 &&
1715                             info_element->data[0] == 0x00 &&
1716                             info_element->data[1] == 0xe0 &&
1717                             info_element->data[2] == 0x4c &&
1718                             info_element->data[3] == 0x01 &&
1719                             info_element->data[4] == 0x02) {
1720                                 network->Turbo_Enable = 1;
1721                         }
1722
1723                         //for HTcap and HTinfo parameters
1724                         if(tmp_htcap_len == 0){
1725                                 if(info_element->len >= 4 &&
1726                                    info_element->data[0] == 0x00 &&
1727                                    info_element->data[1] == 0x90 &&
1728                                    info_element->data[2] == 0x4c &&
1729                                    info_element->data[3] == 0x033){
1730
1731                                                 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1732                                                 if(tmp_htcap_len != 0){
1733                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1734                                                         network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1735                                                                 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1736                                                         memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1737                                                 }
1738                                 }
1739                                 if(tmp_htcap_len != 0){
1740                                         network->bssht.bdSupportHT = true;
1741                                         network->bssht.bdHT1R = ((((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1742                                 }else{
1743                                         network->bssht.bdSupportHT = false;
1744                                         network->bssht.bdHT1R = false;
1745                                 }
1746                         }
1747
1748
1749                         if(tmp_htinfo_len == 0){
1750                                 if(info_element->len >= 4 &&
1751                                         info_element->data[0] == 0x00 &&
1752                                         info_element->data[1] == 0x90 &&
1753                                         info_element->data[2] == 0x4c &&
1754                                         info_element->data[3] == 0x034){
1755
1756                                                 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1757                                                 if(tmp_htinfo_len != 0){
1758                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1759                                                         if(tmp_htinfo_len){
1760                                                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1761                                                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1762                                                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1763                                                         }
1764
1765                                                 }
1766
1767                                 }
1768                         }
1769
1770                         if(ieee->aggregation){
1771                                 if(network->bssht.bdSupportHT){
1772                                         if(info_element->len >= 4 &&
1773                                                 info_element->data[0] == 0x00 &&
1774                                                 info_element->data[1] == 0xe0 &&
1775                                                 info_element->data[2] == 0x4c &&
1776                                                 info_element->data[3] == 0x02){
1777
1778                                                 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
1779                                                 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
1780
1781                                         }
1782                                         if(ht_realtek_agg_len >= 5){
1783                                                 network->realtek_cap_exit = true;
1784                                                 network->bssht.bdRT2RTAggregation = true;
1785
1786                                                 if((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1787                                                 network->bssht.bdRT2RTLongSlotTime = true;
1788
1789                                                 if((ht_realtek_agg_buf[4]==1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1790                                                 {
1791                                                         network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1792                                                         //bssDesc->Vender = HT_IOT_PEER_REALTEK_92SE;
1793                                                 }
1794                                         }
1795                                 }
1796
1797                         }
1798
1799                         //if(tmp_htcap_len !=0  ||  tmp_htinfo_len != 0)
1800                         {
1801                                 if((info_element->len >= 3 &&
1802                                          info_element->data[0] == 0x00 &&
1803                                          info_element->data[1] == 0x05 &&
1804                                          info_element->data[2] == 0xb5) ||
1805                                          (info_element->len >= 3 &&
1806                                          info_element->data[0] == 0x00 &&
1807                                          info_element->data[1] == 0x0a &&
1808                                          info_element->data[2] == 0xf7) ||
1809                                          (info_element->len >= 3 &&
1810                                          info_element->data[0] == 0x00 &&
1811                                          info_element->data[1] == 0x10 &&
1812                                          info_element->data[2] == 0x18)){
1813
1814                                                 network->broadcom_cap_exist = true;
1815
1816                                 }
1817                         }
1818                         if(info_element->len >= 3 &&
1819                                 info_element->data[0] == 0x00 &&
1820                                 info_element->data[1] == 0x0c &&
1821                                 info_element->data[2] == 0x43)
1822                         {
1823                                 network->ralink_cap_exist = true;
1824                         }
1825                         else
1826                                 network->ralink_cap_exist = false;
1827                         //added by amy for atheros AP
1828                         if((info_element->len >= 3 &&
1829                                 info_element->data[0] == 0x00 &&
1830                                 info_element->data[1] == 0x03 &&
1831                                 info_element->data[2] == 0x7f) ||
1832                                 (info_element->len >= 3 &&
1833                                 info_element->data[0] == 0x00 &&
1834                                 info_element->data[1] == 0x13 &&
1835                                 info_element->data[2] == 0x74))
1836                         {
1837                         //      printk("========>%s(): athros AP is exist\n",__FUNCTION__);
1838                                 network->atheros_cap_exist = true;
1839                         }
1840                         else
1841                                 network->atheros_cap_exist = false;
1842
1843                         if ((info_element->len >= 3 &&
1844                                 info_element->data[0] == 0x00 &&
1845                                 info_element->data[1] == 0x50 &&
1846                                 info_element->data[2] == 0x43) )
1847                                 {
1848                                         network->marvell_cap_exist = true;
1849                                 }
1850                         else
1851                                 network->marvell_cap_exist = false;
1852
1853                         if(info_element->len >= 3 &&
1854                                 info_element->data[0] == 0x00 &&
1855                                 info_element->data[1] == 0x40 &&
1856                                 info_element->data[2] == 0x96)
1857                         {
1858                                 network->cisco_cap_exist = true;
1859                         }
1860                         else
1861                                 network->cisco_cap_exist = false;
1862                         //added by amy for LEAP of cisco
1863                         if(info_element->len > 4 &&
1864                                 info_element->data[0] == 0x00 &&
1865                                 info_element->data[1] == 0x40 &&
1866                                 info_element->data[2] == 0x96 &&
1867                                 info_element->data[3] == 0x01)
1868                         {
1869                                 if(info_element->len == 6)
1870                                 {
1871                                         memcpy(network->CcxRmState, &info_element[4], 2);
1872                                         if(network->CcxRmState[0] != 0)
1873                                         {
1874                                                 network->bCcxRmEnable = true;
1875                                         }
1876                                         else
1877                                                 network->bCcxRmEnable = false;
1878                                         //
1879                                         // CCXv4 Table 59-1 MBSSID Masks.
1880                                         //
1881                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
1882                                         if(network->MBssidMask != 0)
1883                                         {
1884                                                 network->bMBssidValid = true;
1885                                                 network->MBssidMask = 0xff << (network->MBssidMask);
1886                                                 cpMacAddr(network->MBssid, network->bssid);
1887                                                 network->MBssid[5] &= network->MBssidMask;
1888                                         }
1889                                         else
1890                                         {
1891                                                 network->bMBssidValid = false;
1892                                         }
1893                                 }
1894                                 else
1895                                 {
1896                                         network->bCcxRmEnable = false;
1897                                 }
1898                         }
1899                         if(info_element->len > 4  &&
1900                                 info_element->data[0] == 0x00 &&
1901                                 info_element->data[1] == 0x40 &&
1902                                 info_element->data[2] == 0x96 &&
1903                                 info_element->data[3] == 0x03)
1904                         {
1905                                 if(info_element->len == 5)
1906                                 {
1907                                         network->bWithCcxVerNum = true;
1908                                         network->BssCcxVerNumber = info_element->data[4];
1909                                 }
1910                                 else
1911                                 {
1912                                         network->bWithCcxVerNum = false;
1913                                         network->BssCcxVerNumber = 0;
1914                                 }
1915                         }
1916                         break;
1917
1918                 case MFIE_TYPE_RSN:
1919                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1920                                              info_element->len);
1921                         network->rsn_ie_len = min(info_element->len + 2,
1922                                                   MAX_WPA_IE_LEN);
1923                         memcpy(network->rsn_ie, info_element,
1924                                network->rsn_ie_len);
1925                         break;
1926
1927                         //HT related element.
1928                 case MFIE_TYPE_HT_CAP:
1929                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
1930                                              info_element->len);
1931                         tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1932                         if(tmp_htcap_len != 0){
1933                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1934                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1935                                         sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1936                                 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1937
1938                                 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
1939                                 // windows driver will update WMM parameters each beacon received once connected
1940                                 // Linux driver is a bit different.
1941                                 network->bssht.bdSupportHT = true;
1942                                 network->bssht.bdHT1R = ((((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1943                         }
1944                         else{
1945                                 network->bssht.bdSupportHT = false;
1946                                 network->bssht.bdHT1R = false;
1947                         }
1948                         break;
1949
1950
1951                 case MFIE_TYPE_HT_INFO:
1952                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
1953                                              info_element->len);
1954                         tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1955                         if(tmp_htinfo_len){
1956                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
1957                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1958                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1959                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1960                         }
1961                         break;
1962
1963                 case MFIE_TYPE_AIRONET:
1964                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
1965                                              info_element->len);
1966                         if(info_element->len >IE_CISCO_FLAG_POSITION)
1967                         {
1968                                 network->bWithAironetIE = true;
1969
1970                                 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
1971                                 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
1972                                 //  by adding an Aironet element and setting one or both of the CKIP negotiation bits."
1973                                 if(     (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC)   ||
1974                                         (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK)    )
1975                                 {
1976                                         network->bCkipSupported = true;
1977                                 }
1978                                 else
1979                                 {
1980                                         network->bCkipSupported = false;
1981                                 }
1982                         }
1983                         else
1984                         {
1985                                 network->bWithAironetIE = false;
1986                                 network->bCkipSupported = false;
1987                         }
1988                         break;
1989                 case MFIE_TYPE_QOS_PARAMETER:
1990                         printk(KERN_ERR
1991                                "QoS Error need to parse QOS_PARAMETER IE\n");
1992                         break;
1993
1994                 case MFIE_TYPE_COUNTRY:
1995                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
1996                                              info_element->len);
1997                         //printk("=====>Receive <%s> Country IE\n",network->ssid);
1998                         ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
1999                         break;
2000                 default:
2001                         IEEE80211_DEBUG_MGMT
2002                             ("Unsupported info element: %s (%d)\n",
2003                              get_info_element_string(info_element->id),
2004                              info_element->id);
2005                         break;
2006                 }
2007
2008                 length -= sizeof(*info_element) + info_element->len;
2009                 info_element =
2010                     (struct ieee80211_info_element *)&info_element->
2011                     data[info_element->len];
2012         }
2013
2014         if(!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2015                 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2016         {
2017                 network->unknown_cap_exist = true;
2018         }
2019         else
2020         {
2021                 network->unknown_cap_exist = false;
2022         }
2023         return 0;
2024 }
2025
2026 static inline u8 ieee80211_SignalStrengthTranslate(
2027         u8  CurrSS
2028         )
2029 {
2030         u8 RetSS;
2031
2032         // Step 1. Scale mapping.
2033         if(CurrSS >= 71 && CurrSS <= 100)
2034         {
2035                 RetSS = 90 + ((CurrSS - 70) / 3);
2036         }
2037         else if(CurrSS >= 41 && CurrSS <= 70)
2038         {
2039                 RetSS = 78 + ((CurrSS - 40) / 3);
2040         }
2041         else if(CurrSS >= 31 && CurrSS <= 40)
2042         {
2043                 RetSS = 66 + (CurrSS - 30);
2044         }
2045         else if(CurrSS >= 21 && CurrSS <= 30)
2046         {
2047                 RetSS = 54 + (CurrSS - 20);
2048         }
2049         else if(CurrSS >= 5 && CurrSS <= 20)
2050         {
2051                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2052         }
2053         else if(CurrSS == 4)
2054         {
2055                 RetSS = 36;
2056         }
2057         else if(CurrSS == 3)
2058         {
2059                 RetSS = 27;
2060         }
2061         else if(CurrSS == 2)
2062         {
2063                 RetSS = 18;
2064         }
2065         else if(CurrSS == 1)
2066         {
2067                 RetSS = 9;
2068         }
2069         else
2070         {
2071                 RetSS = CurrSS;
2072         }
2073         //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2074
2075         // Step 2. Smoothing.
2076
2077         //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2078
2079         return RetSS;
2080 }
2081
2082 long ieee80211_translate_todbm(u8 signal_strength_index )// 0-100 index.
2083 {
2084         long    signal_power; // in dBm.
2085
2086         // Translate to dBm (x=0.5y-95).
2087         signal_power = (long)((signal_strength_index + 1) >> 1);
2088         signal_power -= 95;
2089
2090         return signal_power;
2091 }
2092
2093 static inline int ieee80211_network_init(
2094         struct ieee80211_device *ieee,
2095         struct ieee80211_probe_response *beacon,
2096         struct ieee80211_network *network,
2097         struct ieee80211_rx_stats *stats)
2098 {
2099 #ifdef CONFIG_IEEE80211_DEBUG
2100         //char rates_str[64];
2101         //char *p;
2102 #endif
2103
2104         network->qos_data.active = 0;
2105         network->qos_data.supported = 0;
2106         network->qos_data.param_count = 0;
2107         network->qos_data.old_param_count = 0;
2108
2109         /* Pull out fixed field data */
2110         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2111         network->capability = le16_to_cpu(beacon->capability);
2112         network->last_scanned = jiffies;
2113         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2114         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2115         network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
2116         /* Where to pull this? beacon->listen_interval;*/
2117         network->listen_interval = 0x0A;
2118         network->rates_len = network->rates_ex_len = 0;
2119         network->last_associate = 0;
2120         network->ssid_len = 0;
2121         network->flags = 0;
2122         network->atim_window = 0;
2123         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2124             0x3 : 0x0;
2125         network->berp_info_valid = false;
2126         network->broadcom_cap_exist = false;
2127         network->ralink_cap_exist = false;
2128         network->atheros_cap_exist = false;
2129         network->cisco_cap_exist = false;
2130         network->unknown_cap_exist = false;
2131         network->realtek_cap_exit = false;
2132         network->marvell_cap_exist = false;
2133         network->Turbo_Enable = 0;
2134         network->CountryIeLen = 0;
2135         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2136 //Initialize HT parameters
2137         //ieee80211_ht_initialize(&network->bssht);
2138         HTInitializeBssDesc(&network->bssht);
2139         if (stats->freq == IEEE80211_52GHZ_BAND) {
2140                 /* for A band (No DS info) */
2141                 network->channel = stats->received_channel;
2142         } else
2143                 network->flags |= NETWORK_HAS_CCK;
2144
2145         network->wpa_ie_len = 0;
2146         network->rsn_ie_len = 0;
2147
2148         if (ieee80211_parse_info_param
2149             (ieee,beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2150                 return 1;
2151
2152         network->mode = 0;
2153         if (stats->freq == IEEE80211_52GHZ_BAND)
2154                 network->mode = IEEE_A;
2155         else {
2156                 if (network->flags & NETWORK_HAS_OFDM)
2157                         network->mode |= IEEE_G;
2158                 if (network->flags & NETWORK_HAS_CCK)
2159                         network->mode |= IEEE_B;
2160         }
2161
2162         if (network->mode == 0) {
2163                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
2164                                      "network.\n",
2165                                      escape_essid(network->ssid,
2166                                                   network->ssid_len),
2167                                      MAC_ARG(network->bssid));
2168                 return 1;
2169         }
2170
2171         if(network->bssht.bdSupportHT){
2172                 if(network->mode == IEEE_A)
2173                         network->mode = IEEE_N_5G;
2174                 else if(network->mode & (IEEE_G | IEEE_B))
2175                         network->mode = IEEE_N_24G;
2176         }
2177         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2178                 network->flags |= NETWORK_EMPTY_ESSID;
2179
2180 #if 1
2181         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2182         //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2183         stats->noise = ieee80211_translate_todbm((u8)(100-stats->signal)) -25;
2184 #endif
2185
2186         memcpy(&network->stats, stats, sizeof(network->stats));
2187
2188         return 0;
2189 }
2190
2191 static inline int is_same_network(struct ieee80211_network *src,
2192                                   struct ieee80211_network *dst, struct ieee80211_device* ieee)
2193 {
2194         /* A network is only a duplicate if the channel, BSSID, ESSID
2195          * and the capability field (in particular IBSS and BSS) all match.
2196          * We treat all <hidden> with the same BSSID and channel
2197          * as one network */
2198         return //((src->ssid_len == dst->ssid_len) &&
2199                 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2200                 (src->channel == dst->channel) &&
2201                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2202                 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2203                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2204                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2205                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2206                 ((src->capability & WLAN_CAPABILITY_BSS) ==
2207                 (dst->capability & WLAN_CAPABILITY_BSS)));
2208 }
2209
2210 static inline void update_network(struct ieee80211_network *dst,
2211                                   struct ieee80211_network *src)
2212 {
2213         int qos_active;
2214         u8 old_param;
2215
2216         memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2217         dst->capability = src->capability;
2218         memcpy(dst->rates, src->rates, src->rates_len);
2219         dst->rates_len = src->rates_len;
2220         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2221         dst->rates_ex_len = src->rates_ex_len;
2222         if(src->ssid_len > 0)
2223         {
2224                 memset(dst->ssid, 0, dst->ssid_len);
2225                 dst->ssid_len = src->ssid_len;
2226                 memcpy(dst->ssid, src->ssid, src->ssid_len);
2227         }
2228         dst->mode = src->mode;
2229         dst->flags = src->flags;
2230         dst->time_stamp[0] = src->time_stamp[0];
2231         dst->time_stamp[1] = src->time_stamp[1];
2232         if (src->flags & NETWORK_HAS_ERP_VALUE)
2233         {
2234                 dst->erp_value = src->erp_value;
2235                 dst->berp_info_valid = src->berp_info_valid = true;
2236         }
2237         dst->beacon_interval = src->beacon_interval;
2238         dst->listen_interval = src->listen_interval;
2239         dst->atim_window = src->atim_window;
2240         dst->dtim_period = src->dtim_period;
2241         dst->dtim_data = src->dtim_data;
2242         dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2243         dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2244         memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2245
2246         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2247         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2248         dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2249         memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2250         dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2251         memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2252         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2253         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2254         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2255         dst->ralink_cap_exist = src->ralink_cap_exist;
2256         dst->atheros_cap_exist = src->atheros_cap_exist;
2257         dst->realtek_cap_exit = src->realtek_cap_exit;
2258         dst->marvell_cap_exist = src->marvell_cap_exist;
2259         dst->cisco_cap_exist = src->cisco_cap_exist;
2260         dst->unknown_cap_exist = src->unknown_cap_exist;
2261         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2262         dst->wpa_ie_len = src->wpa_ie_len;
2263         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2264         dst->rsn_ie_len = src->rsn_ie_len;
2265
2266         dst->last_scanned = jiffies;
2267         /* qos related parameters */
2268         //qos_active = src->qos_data.active;
2269         qos_active = dst->qos_data.active;
2270         //old_param = dst->qos_data.old_param_count;
2271         old_param = dst->qos_data.param_count;
2272         if(dst->flags & NETWORK_HAS_QOS_MASK){
2273         //not update QOS paramter in beacon, as most AP will set all these parameter to 0.//WB
2274         //      printk("====>%s(), aifs:%x, %x\n", __FUNCTION__, dst->qos_data.parameters.aifs[0], src->qos_data.parameters.aifs[0]);
2275         //      memcpy(&dst->qos_data, &src->qos_data,
2276         //              sizeof(struct ieee80211_qos_data));
2277         }
2278         else {
2279                 dst->qos_data.supported = src->qos_data.supported;
2280                 dst->qos_data.param_count = src->qos_data.param_count;
2281         }
2282
2283         if(dst->qos_data.supported == 1) {
2284                 dst->QoS_Enable = 1;
2285                 if(dst->ssid_len)
2286                         IEEE80211_DEBUG_QOS
2287                                 ("QoS the network %s is QoS supported\n",
2288                                 dst->ssid);
2289                 else
2290                         IEEE80211_DEBUG_QOS
2291                                 ("QoS the network is QoS supported\n");
2292         }
2293         dst->qos_data.active = qos_active;
2294         dst->qos_data.old_param_count = old_param;
2295
2296         /* dst->last_associate is not overwritten */
2297 #if 1
2298         dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2299         if(src->wmm_param[0].ac_aci_acm_aifsn|| \
2300            src->wmm_param[1].ac_aci_acm_aifsn|| \
2301            src->wmm_param[2].ac_aci_acm_aifsn|| \
2302            src->wmm_param[1].ac_aci_acm_aifsn) {
2303           memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2304         }
2305         //dst->QoS_Enable = src->QoS_Enable;
2306 #else
2307         dst->QoS_Enable = 1;//for Rtl8187 simulation
2308 #endif
2309         dst->Turbo_Enable = src->Turbo_Enable;
2310
2311         dst->CountryIeLen = src->CountryIeLen;
2312         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2313
2314         //added by amy for LEAP
2315         dst->bWithAironetIE = src->bWithAironetIE;
2316         dst->bCkipSupported = src->bCkipSupported;
2317         memcpy(dst->CcxRmState,src->CcxRmState,2);
2318         dst->bCcxRmEnable = src->bCcxRmEnable;
2319         dst->MBssidMask = src->MBssidMask;
2320         dst->bMBssidValid = src->bMBssidValid;
2321         memcpy(dst->MBssid,src->MBssid,6);
2322         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2323         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2324
2325 }
2326
2327 static inline int is_beacon(__le16 fc)
2328 {
2329         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2330 }
2331
2332 static inline void ieee80211_process_probe_response(
2333         struct ieee80211_device *ieee,
2334         struct ieee80211_probe_response *beacon,
2335         struct ieee80211_rx_stats *stats)
2336 {
2337         struct ieee80211_network network;
2338         struct ieee80211_network *target;
2339         struct ieee80211_network *oldest = NULL;
2340 #ifdef CONFIG_IEEE80211_DEBUG
2341         struct ieee80211_info_element *info_element = &beacon->info_element[0];
2342 #endif
2343         unsigned long flags;
2344         short renew;
2345         //u8 wmm_info;
2346
2347         memset(&network, 0, sizeof(struct ieee80211_network));
2348         IEEE80211_DEBUG_SCAN(
2349                 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2350                 escape_essid(info_element->data, info_element->len),
2351                 MAC_ARG(beacon->header.addr3),
2352                 (beacon->capability & (1<<0xf)) ? '1' : '0',
2353                 (beacon->capability & (1<<0xe)) ? '1' : '0',
2354                 (beacon->capability & (1<<0xd)) ? '1' : '0',
2355                 (beacon->capability & (1<<0xc)) ? '1' : '0',
2356                 (beacon->capability & (1<<0xb)) ? '1' : '0',
2357                 (beacon->capability & (1<<0xa)) ? '1' : '0',
2358                 (beacon->capability & (1<<0x9)) ? '1' : '0',
2359                 (beacon->capability & (1<<0x8)) ? '1' : '0',
2360                 (beacon->capability & (1<<0x7)) ? '1' : '0',
2361                 (beacon->capability & (1<<0x6)) ? '1' : '0',
2362                 (beacon->capability & (1<<0x5)) ? '1' : '0',
2363                 (beacon->capability & (1<<0x4)) ? '1' : '0',
2364                 (beacon->capability & (1<<0x3)) ? '1' : '0',
2365                 (beacon->capability & (1<<0x2)) ? '1' : '0',
2366                 (beacon->capability & (1<<0x1)) ? '1' : '0',
2367                 (beacon->capability & (1<<0x0)) ? '1' : '0');
2368
2369         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
2370                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
2371                                      escape_essid(info_element->data,
2372                                                   info_element->len),
2373                                      MAC_ARG(beacon->header.addr3),
2374                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2375                                      IEEE80211_STYPE_PROBE_RESP ?
2376                                      "PROBE RESPONSE" : "BEACON");
2377                 return;
2378         }
2379
2380         // For Asus EeePc request,
2381         // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2382         //         wireless adapter should follow the country code.
2383         // (2)  If there is no any country code in beacon,
2384         //       then wireless adapter should do active scan from ch1~11 and
2385         //       passive scan from ch12~14
2386
2387         if( !IsLegalChannel(ieee, network.channel) )
2388                 return;
2389         if(ieee->bGlobalDomain)
2390         {
2391                 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP)
2392                 {
2393                         // Case 1: Country code
2394                         if(IS_COUNTRY_IE_VALID(ieee) )
2395                         {
2396                                 if( !IsLegalChannel(ieee, network.channel) )
2397                                 {
2398                                         printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
2399                                         return;
2400                                 }
2401                         }
2402                         // Case 2: No any country code.
2403                         else
2404                         {
2405                                 // Filter over channel ch12~14
2406                                 if(network.channel > 11)
2407                                 {
2408                                         printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
2409                                         return;
2410                                 }
2411                         }
2412                 }
2413                 else
2414                 {
2415                         // Case 1: Country code
2416                         if(IS_COUNTRY_IE_VALID(ieee) )
2417                         {
2418                                 if( !IsLegalChannel(ieee, network.channel) )
2419                                 {
2420                                         printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel);
2421                                         return;
2422                                 }
2423                         }
2424                         // Case 2: No any country code.
2425                         else
2426                         {
2427                                 // Filter over channel ch12~14
2428                                 if(network.channel > 14)
2429                                 {
2430                                         printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel);
2431                                         return;
2432                                 }
2433                         }
2434                 }
2435         }
2436
2437         /* The network parsed correctly -- so now we scan our known networks
2438          * to see if we can find it in our list.
2439          *
2440          * NOTE:  This search is definitely not optimized.  Once its doing
2441          *        the "right thing" we'll optimize it for efficiency if
2442          *        necessary */
2443
2444         /* Search for this entry in the list and update it if it is
2445          * already there. */
2446
2447         spin_lock_irqsave(&ieee->lock, flags);
2448
2449         if(is_same_network(&ieee->current_network, &network, ieee)) {
2450                 update_network(&ieee->current_network, &network);
2451                 if((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2452                 && ieee->current_network.berp_info_valid){
2453                 if(ieee->current_network.erp_value& ERP_UseProtection)
2454                         ieee->current_network.buseprotection = true;
2455                 else
2456                         ieee->current_network.buseprotection = false;
2457                 }
2458                 if(is_beacon(beacon->header.frame_ctl))
2459                 {
2460                         if(ieee->state == IEEE80211_LINKED)
2461                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2462                 }
2463                 else //hidden AP
2464                         network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2465         }
2466
2467         list_for_each_entry(target, &ieee->network_list, list) {
2468                 if (is_same_network(target, &network, ieee))
2469                         break;
2470                 if ((oldest == NULL) ||
2471                     (target->last_scanned < oldest->last_scanned))
2472                         oldest = target;
2473         }
2474
2475         /* If we didn't find a match, then get a new network slot to initialize
2476          * with this beacon's information */
2477         if (&target->list == &ieee->network_list) {
2478                 if (list_empty(&ieee->network_free_list)) {
2479                         /* If there are no more slots, expire the oldest */
2480                         list_del(&oldest->list);
2481                         target = oldest;
2482                         IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
2483                                              "network list.\n",
2484                                              escape_essid(target->ssid,
2485                                                           target->ssid_len),
2486                                              MAC_ARG(target->bssid));
2487                 } else {
2488                         /* Otherwise just pull from the free list */
2489                         target = list_entry(ieee->network_free_list.next,
2490                                             struct ieee80211_network, list);
2491                         list_del(ieee->network_free_list.next);
2492                 }
2493
2494
2495 #ifdef CONFIG_IEEE80211_DEBUG
2496                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
2497                                      escape_essid(network.ssid,
2498                                                   network.ssid_len),
2499                                      MAC_ARG(network.bssid),
2500                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2501                                      IEEE80211_STYPE_PROBE_RESP ?
2502                                      "PROBE RESPONSE" : "BEACON");
2503 #endif
2504                 memcpy(target, &network, sizeof(*target));
2505                 list_add_tail(&target->list, &ieee->network_list);
2506                 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2507                         ieee80211_softmac_new_net(ieee,&network);
2508         } else {
2509                 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
2510                                      escape_essid(target->ssid,
2511                                                   target->ssid_len),
2512                                      MAC_ARG(target->bssid),
2513                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2514                                      IEEE80211_STYPE_PROBE_RESP ?
2515                                      "PROBE RESPONSE" : "BEACON");
2516
2517                 /* we have an entry and we are going to update it. But this entry may
2518                  * be already expired. In this case we do the same as we found a new
2519                  * net and call the new_net handler
2520                  */
2521                 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2522                 //YJ,add,080819,for hidden ap
2523                 if(is_beacon(beacon->header.frame_ctl) == 0)
2524                         network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
2525                 //if(strncmp(network.ssid, "linksys-c",9) == 0)
2526                 //      printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
2527                 if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2528                     && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
2529                     ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
2530                         renew = 1;
2531                 //YJ,add,080819,for hidden ap,end
2532
2533                 update_network(target, &network);
2534                 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2535                         ieee80211_softmac_new_net(ieee,&network);
2536         }
2537
2538         spin_unlock_irqrestore(&ieee->lock, flags);
2539         if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, &network, ieee)&&\
2540                 (ieee->state == IEEE80211_LINKED)) {
2541                 if(ieee->handle_beacon != NULL) {
2542                         ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
2543                 }
2544         }
2545 }
2546
2547 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2548                       struct ieee80211_hdr_4addr *header,
2549                       struct ieee80211_rx_stats *stats)
2550 {
2551         if(ieee->sta_sleep || (ieee->ps != IEEE80211_PS_DISABLED &&
2552                                 ieee->iw_mode == IW_MODE_INFRA &&
2553                                 ieee->state == IEEE80211_LINKED))
2554         {
2555                 tasklet_schedule(&ieee->ps_task);
2556         }
2557
2558         if(WLAN_FC_GET_STYPE(header->frame_ctl) != IEEE80211_STYPE_PROBE_RESP &&
2559                 WLAN_FC_GET_STYPE(header->frame_ctl) != IEEE80211_STYPE_BEACON)
2560                 ieee->last_rx_ps_time = jiffies;
2561
2562         switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2563
2564         case IEEE80211_STYPE_BEACON:
2565                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2566                                      WLAN_FC_GET_STYPE(header->frame_ctl));
2567                 IEEE80211_DEBUG_SCAN("Beacon\n");
2568                 ieee80211_process_probe_response(
2569                         ieee, (struct ieee80211_probe_response *)header, stats);
2570                 break;
2571
2572         case IEEE80211_STYPE_PROBE_RESP:
2573                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2574                                      WLAN_FC_GET_STYPE(header->frame_ctl));
2575                 IEEE80211_DEBUG_SCAN("Probe response\n");
2576                 ieee80211_process_probe_response(
2577                         ieee, (struct ieee80211_probe_response *)header, stats);
2578                 break;
2579
2580         }
2581 }