drivers/staging/rtl8192e/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 #ifdef ENABLE_DOT11D
  48 #include "dot11d.h"
  49 #endif
  50 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  51                                         struct sk_buff *skb,
  52                                         struct ieee80211_rx_stats *rx_stats)
  53 {
  54         struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *)skb->data;
  55         u16 fc = le16_to_cpu(hdr->frame_ctl);
  56
  57         skb->dev = ieee->dev;
  58 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
  59         skb_reset_mac_header(skb);
  60 #else
  61         skb->mac.raw = skb->data;
  62 #endif
  63
  64         skb_pull(skb, ieee80211_get_hdrlen(fc));
  65         skb->pkt_type = PACKET_OTHERHOST;
  66         skb->protocol = __constant_htons(ETH_P_80211_RAW);
  67         memset(skb->cb, 0, sizeof(skb->cb));
  68         netif_rx(skb);
  69 }
  70
  71
  72 /* Called only as a tasklet (software IRQ) */
  73 static struct ieee80211_frag_entry *
  74 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
  75                           unsigned int frag, u8 tid,u8 *src, u8 *dst)
  76 {
  77         struct ieee80211_frag_entry *entry;
  78         int i;
  79
  80         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  81                 entry = &ieee->frag_cache[tid][i];
  82                 if (entry->skb != NULL &&
  83                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  84                         IEEE80211_DEBUG_FRAG(
  85                                 "expiring fragment cache entry "
  86                                 "seq=%u last_frag=%u\n",
  87                                 entry->seq, entry->last_frag);
  88                         dev_kfree_skb_any(entry->skb);
  89                         entry->skb = NULL;
  90                 }
  91
  92                 if (entry->skb != NULL && entry->seq == seq &&
  93                     (entry->last_frag + 1 == frag || frag == -1) &&
  94                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  95                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  96                         return entry;
  97         }
  98
  99         return NULL;
 100 }
 101
 102 /* Called only as a tasklet (software IRQ) */
 103 static struct sk_buff *
 104 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
 105                          struct ieee80211_hdr_4addr *hdr)
 106 {
 107         struct sk_buff *skb = NULL;
 108         u16 fc = le16_to_cpu(hdr->frame_ctl);
 109         u16 sc = le16_to_cpu(hdr->seq_ctl);
 110         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
 111         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 112         struct ieee80211_frag_entry *entry;
 113         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 114         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 115         u8 tid;
 116
 117         if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 118           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
 119           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 120           tid = UP2AC(tid);
 121           tid ++;
 122         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 123           hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
 124           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 125           tid = UP2AC(tid);
 126           tid ++;
 127         } else {
 128           tid = 0;
 129         }
 130
 131         if (frag == 0) {
 132                 /* Reserve enough space to fit maximum frame length */
 133                 skb = dev_alloc_skb(ieee->dev->mtu +
 134                                     sizeof(struct ieee80211_hdr_4addr) +
 135                                     8 /* LLC */ +
 136                                     2 /* alignment */ +
 137                                     8 /* WEP */ +
 138                                     ETH_ALEN /* WDS */ +
 139                                     (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
 140                 if (skb == NULL)
 141                         return NULL;
 142
 143                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 144                 ieee->frag_next_idx[tid]++;
 145                 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
 146                         ieee->frag_next_idx[tid] = 0;
 147
 148                 if (entry->skb != NULL)
 149                         dev_kfree_skb_any(entry->skb);
 150
 151                 entry->first_frag_time = jiffies;
 152                 entry->seq = seq;
 153                 entry->last_frag = frag;
 154                 entry->skb = skb;
 155                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 156                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 157         } else {
 158                 /* received a fragment of a frame for which the head fragment
 159                  * should have already been received */
 160                 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
 161                                                   hdr->addr1);
 162                 if (entry != NULL) {
 163                         entry->last_frag = frag;
 164                         skb = entry->skb;
 165                 }
 166         }
 167
 168         return skb;
 169 }
 170
 171
 172 /* Called only as a tasklet (software IRQ) */
 173 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 174                                            struct ieee80211_hdr_4addr *hdr)
 175 {
 176         u16 fc = le16_to_cpu(hdr->frame_ctl);
 177         u16 sc = le16_to_cpu(hdr->seq_ctl);
 178         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 179         struct ieee80211_frag_entry *entry;
 180         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 181         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 182         u8 tid;
 183
 184         if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 185           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
 186           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 187           tid = UP2AC(tid);
 188           tid ++;
 189         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 190           hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
 191           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 192           tid = UP2AC(tid);
 193           tid ++;
 194         } else {
 195           tid = 0;
 196         }
 197
 198         entry = ieee80211_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
 199                                           hdr->addr1);
 200
 201         if (entry == NULL) {
 202                 IEEE80211_DEBUG_FRAG(
 203                         "could not invalidate fragment cache "
 204                         "entry (seq=%u)\n", seq);
 205                 return -1;
 206         }
 207
 208         entry->skb = NULL;
 209         return 0;
 210 }
 211
 212
 213
 214 /* ieee80211_rx_frame_mgtmt
 215  *
 216  * Responsible for handling management control frames
 217  *
 218  * Called by ieee80211_rx */
 219 static inline int
 220 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 221                         struct ieee80211_rx_stats *rx_stats, u16 type,
 222                         u16 stype)
 223 {
 224         /* On the struct stats definition there is written that
 225          * this is not mandatory.... but seems that the probe
 226          * response parser uses it
 227          */
 228         struct ieee80211_hdr_3addr * hdr = (struct ieee80211_hdr_3addr *)skb->data;
 229
 230         rx_stats->len = skb->len;
 231         ieee80211_rx_mgt(ieee,(struct ieee80211_hdr_4addr *)skb->data,rx_stats);
 232         //if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN)))
 233         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN)))//use ADDR1 to perform address matching for Management frames
 234         {
 235                 dev_kfree_skb_any(skb);
 236                 return 0;
 237         }
 238
 239         ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 240
 241         dev_kfree_skb_any(skb);
 242
 243         return 0;
 244
 245         #ifdef NOT_YET
 246         if (ieee->iw_mode == IW_MODE_MASTER) {
 247                 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
 248                        ieee->dev->name);
 249                 return 0;
 250 /*
 251   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 252   skb->data);*/
 253         }
 254
 255         if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) {
 256                 if (stype == WLAN_FC_STYPE_BEACON &&
 257                     ieee->iw_mode == IW_MODE_MASTER) {
 258                         struct sk_buff *skb2;
 259                         /* Process beacon frames also in kernel driver to
 260                          * update STA(AP) table statistics */
 261                         skb2 = skb_clone(skb, GFP_ATOMIC);
 262                         if (skb2)
 263                                 hostap_rx(skb2->dev, skb2, rx_stats);
 264                 }
 265
 266                 /* send management frames to the user space daemon for
 267                  * processing */
 268                 ieee->apdevstats.rx_packets++;
 269                 ieee->apdevstats.rx_bytes += skb->len;
 270                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 271                 return 0;
 272         }
 273
 274             if (ieee->iw_mode == IW_MODE_MASTER) {
 275                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 276                         printk(KERN_DEBUG "%s: unknown management frame "
 277                                "(type=0x%02x, stype=0x%02x) dropped\n",
 278                                skb->dev->name, type, stype);
 279                         return -1;
 280                 }
 281
 282                 hostap_rx(skb->dev, skb, rx_stats);
 283                 return 0;
 284         }
 285
 286         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 287                "received in non-Host AP mode\n", skb->dev->name);
 288         return -1;
 289         #endif
 290 }
 291
 292
 293
 294 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 295 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 296 static unsigned char rfc1042_header[] =
 297 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 298 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 299 static unsigned char bridge_tunnel_header[] =
 300 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 301 /* No encapsulation header if EtherType < 0x600 (=length) */
 302
 303 /* Called by ieee80211_rx_frame_decrypt */
 304 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 305                                     struct sk_buff *skb, size_t hdrlen)
 306 {
 307         struct net_device *dev = ieee->dev;
 308         u16 fc, ethertype;
 309         struct ieee80211_hdr_4addr *hdr;
 310         u8 *pos;
 311
 312         if (skb->len < 24)
 313                 return 0;
 314
 315         hdr = (struct ieee80211_hdr_4addr *) skb->data;
 316         fc = le16_to_cpu(hdr->frame_ctl);
 317
 318         /* check that the frame is unicast frame to us */
 319         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 320             IEEE80211_FCTL_TODS &&
 321             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 322             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 323                 /* ToDS frame with own addr BSSID and DA */
 324         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 325                    IEEE80211_FCTL_FROMDS &&
 326                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 327                 /* FromDS frame with own addr as DA */
 328         } else
 329                 return 0;
 330
 331         if (skb->len < 24 + 8)
 332                 return 0;
 333
 334         /* check for port access entity Ethernet type */
 335 //      pos = skb->data + 24;
 336         pos = skb->data + hdrlen;
 337         ethertype = (pos[6] << 8) | pos[7];
 338         if (ethertype == ETH_P_PAE)
 339                 return 1;
 340
 341         return 0;
 342 }
 343
 344 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 345 static inline int
 346 ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
 347                            struct ieee80211_crypt_data *crypt)
 348 {
 349         struct ieee80211_hdr_4addr *hdr;
 350         int res, hdrlen;
 351
 352         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 353                 return 0;
 354 #if 1
 355         if (ieee->hwsec_active)
 356         {
 357                 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 358                 tcb_desc->bHwSec = 1;
 359         }
 360 #endif
 361         hdr = (struct ieee80211_hdr_4addr *) skb->data;
 362         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 363
 364 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
 365         if (ieee->tkip_countermeasures &&
 366             strcmp(crypt->ops->name, "TKIP") == 0) {
 367                 if (net_ratelimit()) {
 368                         printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
 369                                "received packet from " MAC_FMT "\n",
 370                                ieee->dev->name, MAC_ARG(hdr->addr2));
 371                 }
 372                 return -1;
 373         }
 374 #endif
 375
 376         atomic_inc(&crypt->refcnt);
 377         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 378         atomic_dec(&crypt->refcnt);
 379         if (res < 0) {
 380                 IEEE80211_DEBUG_DROP(
 381                         "decryption failed (SA=" MAC_FMT
 382                         ") res=%d\n", MAC_ARG(hdr->addr2), res);
 383                 if (res == -2)
 384                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 385                                              "mismatch (key %d)\n",
 386                                              skb->data[hdrlen + 3] >> 6);
 387                 ieee->ieee_stats.rx_discards_undecryptable++;
 388                 return -1;
 389         }
 390
 391         return res;
 392 }
 393
 394
 395 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 396 static inline int
 397 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
 398                              int keyidx, struct ieee80211_crypt_data *crypt)
 399 {
 400         struct ieee80211_hdr_4addr *hdr;
 401         int res, hdrlen;
 402
 403         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 404                 return 0;
 405         if (ieee->hwsec_active)
 406         {
 407                 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 408                 tcb_desc->bHwSec = 1;
 409         }
 410
 411         hdr = (struct ieee80211_hdr_4addr *) skb->data;
 412         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 413
 414         atomic_inc(&crypt->refcnt);
 415         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 416         atomic_dec(&crypt->refcnt);
 417         if (res < 0) {
 418                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 419                        " (SA=" MAC_FMT " keyidx=%d)\n",
 420                        ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
 421                 return -1;
 422         }
 423
 424         return 0;
 425 }
 426
 427
 428 /* this function is stolen from ipw2200 driver*/
 429 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 430 static int is_duplicate_packet(struct ieee80211_device *ieee,
 431                                       struct ieee80211_hdr_4addr *header)
 432 {
 433         u16 fc = le16_to_cpu(header->frame_ctl);
 434         u16 sc = le16_to_cpu(header->seq_ctl);
 435         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 436         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 437         u16 *last_seq, *last_frag;
 438         unsigned long *last_time;
 439         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 440         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 441         u8 tid;
 442
 443
 444         //TO2DS and QoS
 445         if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 446           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header;
 447           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 448           tid = UP2AC(tid);
 449           tid ++;
 450         } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
 451           hdr_3addrqos = (struct ieee80211_hdr_3addrqos*)header;
 452           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 453           tid = UP2AC(tid);
 454           tid ++;
 455         } else { // no QoS
 456           tid = 0;
 457         }
 458
 459         switch (ieee->iw_mode) {
 460         case IW_MODE_ADHOC:
 461         {
 462                 struct list_head *p;
 463                 struct ieee_ibss_seq *entry = NULL;
 464                 u8 *mac = header->addr2;
 465                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 466                 //for (pos = (head)->next; pos != (head); pos = pos->next)
 467                 //__list_for_each(p, &ieee->ibss_mac_hash[index]) {
 468                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 469                         entry = list_entry(p, struct ieee_ibss_seq, list);
 470                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 471                                 break;
 472                 }
 473         //      if (memcmp(entry->mac, mac, ETH_ALEN)){
 474                 if (p == &ieee->ibss_mac_hash[index]) {
 475                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 476                         if (!entry) {
 477                                 printk(KERN_WARNING "Cannot malloc new mac entry\n");
 478                                 return 0;
 479                         }
 480                         memcpy(entry->mac, mac, ETH_ALEN);
 481                         entry->seq_num[tid] = seq;
 482                         entry->frag_num[tid] = frag;
 483                         entry->packet_time[tid] = jiffies;
 484                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 485                         return 0;
 486                 }
 487                 last_seq = &entry->seq_num[tid];
 488                 last_frag = &entry->frag_num[tid];
 489                 last_time = &entry->packet_time[tid];
 490                 break;
 491         }
 492
 493         case IW_MODE_INFRA:
 494                 last_seq = &ieee->last_rxseq_num[tid];
 495                 last_frag = &ieee->last_rxfrag_num[tid];
 496                 last_time = &ieee->last_packet_time[tid];
 497
 498                 break;
 499         default:
 500                 return 0;
 501         }
 502
 503 //      if(tid != 0) {
 504 //              printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
 505 //      }
 506         if ((*last_seq == seq) &&
 507             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 508                 if (*last_frag == frag){
 509                         //printk(KERN_WARNING "[1] go drop!\n");
 510                         goto drop;
 511
 512                 }
 513                 if (*last_frag + 1 != frag)
 514                         /* out-of-order fragment */
 515                         //printk(KERN_WARNING "[2] go drop!\n");
 516                         goto drop;
 517         } else
 518                 *last_seq = seq;
 519
 520         *last_frag = frag;
 521         *last_time = jiffies;
 522         return 0;
 523
 524 drop:
 525 //      BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
 526 //      printk("DUP\n");
 527
 528         return 1;
 529 }
 530 bool
 531 AddReorderEntry(
 532         PRX_TS_RECORD                   pTS,
 533         PRX_REORDER_ENTRY               pReorderEntry
 534         )
 535 {
 536         struct list_head *pList = &pTS->RxPendingPktList;
 537 #if  1
 538         while(pList->next != &pTS->RxPendingPktList)
 539         {
 540                 if( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 541                 {
 542                         pList = pList->next;
 543                 }
 544                 else if( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 545                 {
 546                         return false;
 547                 }
 548                 else
 549                 {
 550                         break;
 551                 }
 552         }
 553 #endif
 554         pReorderEntry->List.next = pList->next;
 555         pReorderEntry->List.next->prev = &pReorderEntry->List;
 556         pReorderEntry->List.prev = pList;
 557         pList->next = &pReorderEntry->List;
 558
 559         return true;
 560 }
 561
 562 void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb** prxbIndicateArray,u8  index)
 563 {
 564         u8 i = 0 , j=0;
 565         u16 ethertype;
 566 //      if(index > 1)
 567 //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__FUNCTION__,index);
 568         for(j = 0; j<index; j++)
 569         {
 570 //added by amy for reorder
 571                 struct ieee80211_rxb* prxb = prxbIndicateArray[j];
 572                 for(i = 0; i<prxb->nr_subframes; i++) {
 573                         struct sk_buff *sub_skb = prxb->subframes[i];
 574
 575                 /* convert hdr + possible LLC headers into Ethernet header */
 576                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 577                         if (sub_skb->len >= 8 &&
 578                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
 579                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 580                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 581                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
 582                          * replace EtherType */
 583                                 skb_pull(sub_skb, SNAP_SIZE);
 584                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 585                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 586                         } else {
 587                                 u16 len;
 588                         /* Leave Ethernet header part of hdr and full payload */
 589                                 len = htons(sub_skb->len);
 590                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 591                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 592                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 593                         }
 594                         //stats->rx_packets++;
 595                         //stats->rx_bytes += sub_skb->len;
 596
 597                 /* Indicat the packets to upper layer */
 598                         if (sub_skb) {
 599                                 //printk("0skb_len(%d)\n", skb->len);
 600                                 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
 601                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 602                                 sub_skb->dev = ieee->dev;
 603                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 604                                 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
 605                                 ieee->last_rx_ps_time = jiffies;
 606                                 //printk("1skb_len(%d)\n", skb->len);
 607                                 netif_rx(sub_skb);
 608                         }
 609                 }
 610                 kfree(prxb);
 611                 prxb = NULL;
 612         }
 613 }
 614
 615
 616 void RxReorderIndicatePacket( struct ieee80211_device *ieee,
 617                 struct ieee80211_rxb* prxb,
 618                 PRX_TS_RECORD           pTS,
 619                 u16                     SeqNum)
 620 {
 621         PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
 622         PRX_REORDER_ENTRY       pReorderEntry = NULL;
 623         struct ieee80211_rxb* prxbIndicateArray[REORDER_WIN_SIZE];
 624         u8                      WinSize = pHTInfo->RxReorderWinSize;
 625         u16                     WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
 626         u8                      index = 0;
 627         bool                    bMatchWinStart = false, bPktInBuf = false;
 628         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__FUNCTION__,SeqNum,pTS->RxIndicateSeq,WinSize);
 629 #if 0
 630         if(!list_empty(&ieee->RxReorder_Unused_List))
 631                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): ieee->RxReorder_Unused_List is nut NULL\n");
 632 #endif
 633         /* Rx Reorder initialize condition.*/
 634         if(pTS->RxIndicateSeq == 0xffff) {
 635                 pTS->RxIndicateSeq = SeqNum;
 636         }
 637
 638         /* Drop out the packet which SeqNum is smaller than WinStart */
 639         if(SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 640                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 641                                  pTS->RxIndicateSeq, SeqNum);
 642                 pHTInfo->RxReorderDropCounter++;
 643                 {
 644                         int i;
 645                         for(i =0; i < prxb->nr_subframes; i++) {
 646                                 dev_kfree_skb(prxb->subframes[i]);
 647                         }
 648                         kfree(prxb);
 649                         prxb = NULL;
 650                 }
 651                 return;
 652         }
 653
 654         /*
 655          * Sliding window manipulation. Conditions includes:
 656          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 657          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 658          */
 659         if(SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 660                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 661                 bMatchWinStart = true;
 662         } else if(SN_LESS(WinEnd, SeqNum)) {
 663                 if(SeqNum >= (WinSize - 1)) {
 664                         pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
 665                 } else {
 666                         pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
 667                 }
 668                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 669         }
 670
 671         /*
 672          * Indication process.
 673          * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
 674          * with the SeqNum smaller than latest WinStart and buffer other packets.
 675          */
 676         /* For Rx Reorder condition:
 677          * 1. All packets with SeqNum smaller than WinStart => Indicate
 678          * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
 679          */
 680         if(bMatchWinStart) {
 681                 /* Current packet is going to be indicated.*/
 682                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
 683                                 pTS->RxIndicateSeq, SeqNum);
 684                 prxbIndicateArray[0] = prxb;
 685 //              printk("========================>%s(): SeqNum is %d\n",__FUNCTION__,SeqNum);
 686                 index = 1;
 687         } else {
 688                 /* Current packet is going to be inserted into pending list.*/
 689                 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to orderd list\n",__FUNCTION__);
 690                 if(!list_empty(&ieee->RxReorder_Unused_List)) {
 691                         pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List);
 692                         list_del_init(&pReorderEntry->List);
 693
 694                         /* Make a reorder entry and insert into a the packet list.*/
 695                         pReorderEntry->SeqNum = SeqNum;
 696                         pReorderEntry->prxb = prxb;
 697         //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);
 698
 699 #if 1
 700                         if(!AddReorderEntry(pTS, pReorderEntry)) {
 701                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
 702                                         __FUNCTION__, pTS->RxIndicateSeq, SeqNum);
 703                                 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 704                                 {
 705                                         int i;
 706                                         for(i =0; i < prxb->nr_subframes; i++) {
 707                                                 dev_kfree_skb(prxb->subframes[i]);
 708                                         }
 709                                         kfree(prxb);
 710                                         prxb = NULL;
 711                                 }
 712                         } else {
 713                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,
 714                                          "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 715                         }
 716 #endif
 717                 }
 718                 else {
 719                         /*
 720                          * Packets are dropped if there is not enough reorder entries.
 721                          * This part shall be modified!! We can just indicate all the
 722                          * packets in buffer and get reorder entries.
 723                          */
 724                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
 725                         {
 726                                 int i;
 727                                 for(i =0; i < prxb->nr_subframes; i++) {
 728                                         dev_kfree_skb(prxb->subframes[i]);
 729                                 }
 730                                 kfree(prxb);
 731                                 prxb = NULL;
 732                         }
 733                 }
 734         }
 735
 736         /* Check if there is any packet need indicate.*/
 737         while(!list_empty(&pTS->RxPendingPktList)) {
 738                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): start RREORDER indicate\n",__FUNCTION__);
 739 #if 1
 740                 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List);
 741                 if( SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 742                                 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 743                 {
 744                         /* This protect buffer from overflow. */
 745                         if(index >= REORDER_WIN_SIZE) {
 746                                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
 747                                 bPktInBuf = true;
 748                                 break;
 749                         }
 750
 751                         list_del_init(&pReorderEntry->List);
 752
 753                         if(SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 754                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 755
 756                         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packets indication!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 757                         prxbIndicateArray[index] = pReorderEntry->prxb;
 758                 //      printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);
 759                         index++;
 760
 761                         list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 762                 } else {
 763                         bPktInBuf = true;
 764                         break;
 765                 }
 766 #endif
 767         }
 768
 769         /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
 770         if(index>0) {
 771                 // Cancel previous pending timer.
 772                 if (timer_pending(&pTS->RxPktPendingTimer))
 773                         del_timer_sync(&pTS->RxPktPendingTimer);
 774                 pTS->RxTimeoutIndicateSeq = 0xffff;
 775
 776                 // Indicate packets
 777                 if(index>REORDER_WIN_SIZE){
 778                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer buffer full!! \n");
 779                         return;
 780                 }
 781                 ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
 782                 bPktInBuf = false;
 783         }
 784
 785 #if 1
 786         if(bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
 787                 // Set new pending timer.
 788                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): SET rx timeout timer\n", __FUNCTION__);
 789                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 790 #if 0
 791                 if(timer_pending(&pTS->RxPktPendingTimer))
 792                         del_timer_sync(&pTS->RxPktPendingTimer);
 793                 pTS->RxPktPendingTimer.expires = jiffies + MSECS(pHTInfo->RxReorderPendingTime);
 794                 add_timer(&pTS->RxPktPendingTimer);
 795 #else
 796                 mod_timer(&pTS->RxPktPendingTimer,  jiffies + MSECS(pHTInfo->RxReorderPendingTime));
 797 #endif
 798         }
 799 #endif
 800 }
 801
 802 u8 parse_subframe(struct sk_buff *skb,
 803                   struct ieee80211_rx_stats *rx_stats,
 804                   struct ieee80211_rxb *rxb,u8* src,u8* dst)
 805 {
 806         struct ieee80211_hdr_3addr  *hdr = (struct ieee80211_hdr_3addr* )skb->data;
 807         u16             fc = le16_to_cpu(hdr->frame_ctl);
 808
 809         u16             LLCOffset= sizeof(struct ieee80211_hdr_3addr);
 810         u16             ChkLength;
 811         bool            bIsAggregateFrame = false;
 812         u16             nSubframe_Length;
 813         u8              nPadding_Length = 0;
 814         u16             SeqNum=0;
 815
 816         struct sk_buff *sub_skb;
 817         u8             *data_ptr;
 818         /* just for debug purpose */
 819         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 820
 821         if((IEEE80211_QOS_HAS_SEQ(fc))&&\
 822                         (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
 823                 bIsAggregateFrame = true;
 824         }
 825
 826         if(IEEE80211_QOS_HAS_SEQ(fc)) {
 827                 LLCOffset += 2;
 828         }
 829
 830         if(rx_stats->bContainHTC) {
 831                 LLCOffset += sHTCLng;
 832         }
 833         //printk("ChkLength = %d\n", LLCOffset);
 834         // Null packet, don't indicate it to upper layer
 835         ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
 836
 837         if( skb->len <= ChkLength ) {
 838                 return 0;
 839         }
 840
 841         skb_pull(skb, LLCOffset);
 842
 843         if(!bIsAggregateFrame) {
 844                 rxb->nr_subframes = 1;
 845 #ifdef JOHN_NOCPY
 846                 rxb->subframes[0] = skb;
 847 #else
 848                 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
 849 #endif
 850
 851                 memcpy(rxb->src,src,ETH_ALEN);
 852                 memcpy(rxb->dst,dst,ETH_ALEN);
 853                 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
 854                 return 1;
 855         } else {
 856                 rxb->nr_subframes = 0;
 857                 memcpy(rxb->src,src,ETH_ALEN);
 858                 memcpy(rxb->dst,dst,ETH_ALEN);
 859                 while(skb->len > ETHERNET_HEADER_SIZE) {
 860                         /* Offset 12 denote 2 mac address */
 861                         nSubframe_Length = *((u16*)(skb->data + 12));
 862                         //==m==>change the length order
 863                         nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
 864
 865                         if(skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 866 #if 0//cosa
 867                                 RT_ASSERT(
 868                                                 (nRemain_Length>=(ETHERNET_HEADER_SIZE + nSubframe_Length)),
 869                                                 ("ParseSubframe(): A-MSDU subframe parse error!! Subframe Length: %d\n", nSubframe_Length) );
 870 #endif
 871                                 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
 872                                                 __FUNCTION__,rxb->nr_subframes);
 873                                 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__FUNCTION__, nSubframe_Length);
 874                                 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
 875                                 printk("The Packet SeqNum is %d\n",SeqNum);
 876                                 return 0;
 877                         }
 878
 879                         /* move the data point to data content */
 880                         skb_pull(skb, ETHERNET_HEADER_SIZE);
 881
 882 #ifdef JOHN_NOCPY
 883                         sub_skb = skb_clone(skb, GFP_ATOMIC);
 884                         sub_skb->len = nSubframe_Length;
 885                         sub_skb->tail = sub_skb->data + nSubframe_Length;
 886 #else
 887                         /* Allocate new skb for releasing to upper layer */
 888                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 889                         skb_reserve(sub_skb, 12);
 890                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
 891                         memcpy(data_ptr,skb->data,nSubframe_Length);
 892 #endif
 893                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
 894                         if(rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 895                                 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
 896                                 break;
 897                         }
 898                         skb_pull(skb,nSubframe_Length);
 899
 900                         if(skb->len != 0) {
 901                                 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
 902                                 if(nPadding_Length == 4) {
 903                                         nPadding_Length = 0;
 904                                 }
 905
 906                                 if(skb->len < nPadding_Length) {
 907                                         return 0;
 908                                 }
 909
 910                                 skb_pull(skb,nPadding_Length);
 911                         }
 912                 }
 913 #ifdef JOHN_NOCPY
 914                 dev_kfree_skb(skb);
 915 #endif
 916                 //{just for debug added by david
 917                 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
 918                 //}
 919                 return rxb->nr_subframes;
 920         }
 921 }
 922
 923 /* All received frames are sent to this function. @skb contains the frame in
 924  * IEEE 802.11 format, i.e., in the format it was sent over air.
 925  * This function is called only as a tasklet (software IRQ). */
 926 int ieee80211_rtl_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 927                  struct ieee80211_rx_stats *rx_stats)
 928 {
 929         struct net_device *dev = ieee->dev;
 930         struct ieee80211_hdr_4addr *hdr;
 931         //struct ieee80211_hdr_3addrqos *hdr;
 932
 933         size_t hdrlen;
 934         u16 fc, type, stype, sc;
 935         struct net_device_stats *stats;
 936         unsigned int frag;
 937         u8 *payload;
 938         u16 ethertype;
 939         //added by amy for reorder
 940         u8      TID = 0;
 941         u16     SeqNum = 0;
 942         PRX_TS_RECORD pTS = NULL;
 943         //bool bIsAggregateFrame = false;
 944         //added by amy for reorder
 945 #ifdef NOT_YET
 946         struct net_device *wds = NULL;
 947         struct sk_buff *skb2 = NULL;
 948         struct net_device *wds = NULL;
 949         int frame_authorized = 0;
 950         int from_assoc_ap = 0;
 951         void *sta = NULL;
 952 #endif
 953 //      u16 qos_ctl = 0;
 954         u8 dst[ETH_ALEN];
 955         u8 src[ETH_ALEN];
 956         u8 bssid[ETH_ALEN];
 957         struct ieee80211_crypt_data *crypt = NULL;
 958         int keyidx = 0;
 959
 960         int i;
 961         struct ieee80211_rxb* rxb = NULL;
 962         // cheat the the hdr type
 963         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 964         stats = &ieee->stats;
 965
 966         if (skb->len < 10) {
 967                 printk(KERN_INFO "%s: SKB length < 10\n",
 968                        dev->name);
 969                 goto rx_dropped;
 970         }
 971
 972         fc = le16_to_cpu(hdr->frame_ctl);
 973         type = WLAN_FC_GET_TYPE(fc);
 974         stype = WLAN_FC_GET_STYPE(fc);
 975         sc = le16_to_cpu(hdr->seq_ctl);
 976
 977         frag = WLAN_GET_SEQ_FRAG(sc);
 978         hdrlen = ieee80211_get_hdrlen(fc);
 979
 980         if(HTCCheck(ieee, skb->data))
 981         {
 982                 if(net_ratelimit())
 983                 printk("find HTCControl\n");
 984                 hdrlen += 4;
 985                 rx_stats->bContainHTC = 1;
 986         }
 987
 988         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
 989 #ifdef NOT_YET
 990 #if WIRELESS_EXT > 15
 991         /* Put this code here so that we avoid duplicating it in all
 992          * Rx paths. - Jean II */
 993 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 994         /* If spy monitoring on */
 995         if (iface->spy_data.spy_number > 0) {
 996                 struct iw_quality wstats;
 997                 wstats.level = rx_stats->rssi;
 998                 wstats.noise = rx_stats->noise;
 999                 wstats.updated = 6;     /* No qual value */
1000                 /* Update spy records */
1001                 wireless_spy_update(dev, hdr->addr2, &wstats);
1002         }
1003 #endif /* IW_WIRELESS_SPY */
1004 #endif /* WIRELESS_EXT > 15 */
1005         hostap_update_rx_stats(local->ap, hdr, rx_stats);
1006 #endif
1007
1008 #if WIRELESS_EXT > 15
1009         if (ieee->iw_mode == IW_MODE_MONITOR) {
1010                 ieee80211_monitor_rx(ieee, skb, rx_stats);
1011                 stats->rx_packets++;
1012                 stats->rx_bytes += skb->len;
1013                 return 1;
1014         }
1015 #endif
1016         if (ieee->host_decrypt) {
1017                 int idx = 0;
1018                 if (skb->len >= hdrlen + 3)
1019                         idx = skb->data[hdrlen + 3] >> 6;
1020                 crypt = ieee->crypt[idx];
1021 #ifdef NOT_YET
1022                 sta = NULL;
1023
1024                 /* Use station specific key to override default keys if the
1025                  * receiver address is a unicast address ("individual RA"). If
1026                  * bcrx_sta_key parameter is set, station specific key is used
1027                  * even with broad/multicast targets (this is against IEEE
1028                  * 802.11, but makes it easier to use different keys with
1029                  * stations that do not support WEP key mapping). */
1030
1031                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
1032                         (void) hostap_handle_sta_crypto(local, hdr, &crypt,
1033                                                         &sta);
1034 #endif
1035
1036                 /* allow NULL decrypt to indicate an station specific override
1037                  * for default encryption */
1038                 if (crypt && (crypt->ops == NULL ||
1039                               crypt->ops->decrypt_mpdu == NULL))
1040                         crypt = NULL;
1041
1042                 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
1043                         /* This seems to be triggered by some (multicast?)
1044                          * frames from other than current BSS, so just drop the
1045                          * frames silently instead of filling system log with
1046                          * these reports. */
1047                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
1048                                              " (SA=" MAC_FMT ")\n",
1049                                              MAC_ARG(hdr->addr2));
1050                         ieee->ieee_stats.rx_discards_undecryptable++;
1051                         goto rx_dropped;
1052                 }
1053         }
1054
1055         if (skb->len < IEEE80211_DATA_HDR3_LEN)
1056                 goto rx_dropped;
1057
1058         // if QoS enabled, should check the sequence for each of the AC
1059         if( (ieee->pHTInfo->bCurRxReorderEnable == false) || !ieee->current_network.qos_data.active|| !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)){
1060                 if (is_duplicate_packet(ieee, hdr))
1061                 goto rx_dropped;
1062
1063         }
1064         else
1065         {
1066                 PRX_TS_RECORD pRxTS = NULL;
1067         #if 0
1068                 struct ieee80211_hdr_3addr *hdr;
1069                 u16 fc;
1070                 hdr = (struct ieee80211_hdr_3addr *)skb->data;
1071                 fc = le16_to_cpu(hdr->frame_ctl);
1072                 u8 tmp = (fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS);
1073
1074                 u8 tid = (*((u8*)skb->data + (((fc& IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))?30:24)))&0xf;
1075                 printk("====================>fc:%x, tid:%d, tmp:%d\n", fc, tid, tmp);
1076                 //u8 tid =  (u8)((frameqos*)(buf + ((fc & IEEE80211_FCTL_TODS)&&(fc & IEEE80211_FCTL_FROMDS))? 30 : 24))->field.tid;
1077         #endif
1078                         //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__FUNCTION__, tid);
1079 #if 1
1080                 if(GetTs(
1081                                 ieee,
1082                                 (PTS_COMMON_INFO*) &pRxTS,
1083                                 hdr->addr2,
1084                                 (u8)Frame_QoSTID((u8*)(skb->data)),
1085                                 RX_DIR,
1086                                 true))
1087                 {
1088
1089                 //      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));
1090                         if(     (fc & (1<<11))  &&
1091                                         (frag == pRxTS->RxLastFragNum) &&
1092                                         (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)   )
1093                         {
1094                                 goto rx_dropped;
1095                         }
1096                         else
1097                         {
1098                                 pRxTS->RxLastFragNum = frag;
1099                                 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
1100                         }
1101                 }
1102                 else
1103                 {
1104                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n",__FUNCTION__);
1105                         goto rx_dropped;
1106                 }
1107         }
1108 #endif
1109         if (type == IEEE80211_FTYPE_MGMT) {
1110
1111         #if 0
1112                 if ( stype == IEEE80211_STYPE_AUTH &&
1113                     fc & IEEE80211_FCTL_WEP && ieee->host_decrypt &&
1114                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0)
1115                 {
1116                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
1117                                "from " MAC_FMT "\n", dev->name,
1118                                MAC_ARG(hdr->addr2));
1119                         /* TODO: could inform hostapd about this so that it
1120                          * could send auth failure report */
1121                         goto rx_dropped;
1122                 }
1123         #endif
1124
1125         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1126                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1127                         goto rx_dropped;
1128                 else
1129                         goto rx_exit;
1130         }
1131
1132         /* Data frame - extract src/dst addresses */
1133         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1134         case IEEE80211_FCTL_FROMDS:
1135                 memcpy(dst, hdr->addr1, ETH_ALEN);
1136                 memcpy(src, hdr->addr3, ETH_ALEN);
1137                 memcpy(bssid, hdr->addr2, ETH_ALEN);
1138                 break;
1139         case IEEE80211_FCTL_TODS:
1140                 memcpy(dst, hdr->addr3, ETH_ALEN);
1141                 memcpy(src, hdr->addr2, ETH_ALEN);
1142                 memcpy(bssid, hdr->addr1, ETH_ALEN);
1143                 break;
1144         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1145                 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1146                         goto rx_dropped;
1147                 memcpy(dst, hdr->addr3, ETH_ALEN);
1148                 memcpy(src, hdr->addr4, ETH_ALEN);
1149                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1150                 break;
1151         case 0:
1152                 memcpy(dst, hdr->addr1, ETH_ALEN);
1153                 memcpy(src, hdr->addr2, ETH_ALEN);
1154                 memcpy(bssid, hdr->addr3, ETH_ALEN);
1155                 break;
1156         }
1157
1158 #ifdef NOT_YET
1159         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
1160                 goto rx_dropped;
1161         if (wds) {
1162                 skb->dev = dev = wds;
1163                 stats = hostap_get_stats(dev);
1164         }
1165
1166         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1167             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
1168             ieee->stadev &&
1169             memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
1170                 /* Frame from BSSID of the AP for which we are a client */
1171                 skb->dev = dev = ieee->stadev;
1172                 stats = hostap_get_stats(dev);
1173                 from_assoc_ap = 1;
1174         }
1175 #endif
1176
1177         dev->last_rx = jiffies;
1178
1179 #ifdef NOT_YET
1180         if ((ieee->iw_mode == IW_MODE_MASTER ||
1181              ieee->iw_mode == IW_MODE_REPEAT) &&
1182             !from_assoc_ap) {
1183                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
1184                                              wds != NULL)) {
1185                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
1186                         frame_authorized = 0;
1187                         break;
1188                 case AP_RX_CONTINUE:
1189                         frame_authorized = 1;
1190                         break;
1191                 case AP_RX_DROP:
1192                         goto rx_dropped;
1193                 case AP_RX_EXIT:
1194                         goto rx_exit;
1195                 }
1196         }
1197 #endif
1198         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1199         /* Nullfunc frames may have PS-bit set, so they must be passed to
1200          * hostap_handle_sta_rx() before being dropped here. */
1201         if (stype != IEEE80211_STYPE_DATA &&
1202             stype != IEEE80211_STYPE_DATA_CFACK &&
1203             stype != IEEE80211_STYPE_DATA_CFPOLL &&
1204             stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
1205             stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1206             ) {
1207                 if (stype != IEEE80211_STYPE_NULLFUNC)
1208                         IEEE80211_DEBUG_DROP(
1209                                 "RX: dropped data frame "
1210                                 "with no data (type=0x%02x, "
1211                                 "subtype=0x%02x, len=%d)\n",
1212                                 type, stype, skb->len);
1213                 goto rx_dropped;
1214         }
1215         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1216                 goto rx_dropped;
1217
1218         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1219
1220         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1221             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
1222         {
1223                 printk("decrypt frame error\n");
1224                 goto rx_dropped;
1225         }
1226
1227
1228         hdr = (struct ieee80211_hdr_4addr *) skb->data;
1229
1230         /* skb: hdr + (possibly fragmented) plaintext payload */
1231         // PR: FIXME: hostap has additional conditions in the "if" below:
1232         // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1233         if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1234                 int flen;
1235                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1236                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1237
1238                 if (!frag_skb) {
1239                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1240                                         "Rx cannot get skb from fragment "
1241                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1242                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1243                                         WLAN_GET_SEQ_SEQ(sc), frag);
1244                         goto rx_dropped;
1245                 }
1246                 flen = skb->len;
1247                 if (frag != 0)
1248                         flen -= hdrlen;
1249
1250                 if (frag_skb->tail + flen > frag_skb->end) {
1251                         printk(KERN_WARNING "%s: host decrypted and "
1252                                "reassembled frame did not fit skb\n",
1253                                dev->name);
1254                         ieee80211_frag_cache_invalidate(ieee, hdr);
1255                         goto rx_dropped;
1256                 }
1257
1258                 if (frag == 0) {
1259                         /* copy first fragment (including full headers) into
1260                          * beginning of the fragment cache skb */
1261                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1262                 } else {
1263                         /* append frame payload to the end of the fragment
1264                          * cache skb */
1265                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1266                                flen);
1267                 }
1268                 dev_kfree_skb_any(skb);
1269                 skb = NULL;
1270
1271                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1272                         /* more fragments expected - leave the skb in fragment
1273                          * cache for now; it will be delivered to upper layers
1274                          * after all fragments have been received */
1275                         goto rx_exit;
1276                 }
1277
1278                 /* this was the last fragment and the frame will be
1279                  * delivered, so remove skb from fragment cache */
1280                 skb = frag_skb;
1281                 hdr = (struct ieee80211_hdr_4addr *) skb->data;
1282                 ieee80211_frag_cache_invalidate(ieee, hdr);
1283         }
1284
1285         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1286          * encrypted/authenticated */
1287         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1288             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1289         {
1290                 printk("==>decrypt msdu error\n");
1291                 goto rx_dropped;
1292         }
1293
1294         //added by amy for AP roaming
1295         ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1296         ieee->LinkDetectInfo.NumRxOkInPeriod++;
1297
1298         hdr = (struct ieee80211_hdr_4addr *) skb->data;
1299         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1300                 if (/*ieee->ieee802_1x &&*/
1301                     ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1302
1303 #ifdef CONFIG_IEEE80211_DEBUG
1304                         /* pass unencrypted EAPOL frames even if encryption is
1305                          * configured */
1306                         struct eapol *eap = (struct eapol *)(skb->data +
1307                                 24);
1308                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1309                                                 eap_get_type(eap->type));
1310 #endif
1311                 } else {
1312                         IEEE80211_DEBUG_DROP(
1313                                 "encryption configured, but RX "
1314                                 "frame not encrypted (SA=" MAC_FMT ")\n",
1315                                 MAC_ARG(hdr->addr2));
1316                         goto rx_dropped;
1317                 }
1318         }
1319
1320 #ifdef CONFIG_IEEE80211_DEBUG
1321         if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1322             ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1323                         struct eapol *eap = (struct eapol *)(skb->data +
1324                                 24);
1325                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1326                                                 eap_get_type(eap->type));
1327         }
1328 #endif
1329
1330         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1331             !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1332                 IEEE80211_DEBUG_DROP(
1333                         "dropped unencrypted RX data "
1334                         "frame from " MAC_FMT
1335                         " (drop_unencrypted=1)\n",
1336                         MAC_ARG(hdr->addr2));
1337                 goto rx_dropped;
1338         }
1339 /*
1340         if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1341                 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1342         }
1343 */
1344 //added by amy for reorder
1345 #if 1
1346         if(ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1347                 && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1))
1348         {
1349                 TID = Frame_QoSTID(skb->data);
1350                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1351                 GetTs(ieee,(PTS_COMMON_INFO*) &pTS,hdr->addr2,TID,RX_DIR,true);
1352                 if(TID !=0 && TID !=3)
1353                 {
1354                         ieee->bis_any_nonbepkts = true;
1355                 }
1356         }
1357 #endif
1358 //added by amy for reorder
1359         /* skb: hdr + (possible reassembled) full plaintext payload */
1360         payload = skb->data + hdrlen;
1361         //ethertype = (payload[6] << 8) | payload[7];
1362         rxb = (struct ieee80211_rxb*)kmalloc(sizeof(struct ieee80211_rxb),GFP_ATOMIC);
1363         if(rxb == NULL)
1364         {
1365                 IEEE80211_DEBUG(IEEE80211_DL_ERR,"%s(): kmalloc rxb error\n",__FUNCTION__);
1366                 goto rx_dropped;
1367         }
1368         /* to parse amsdu packets */
1369         /* qos data packets & reserved bit is 1 */
1370         if(parse_subframe(skb,rx_stats,rxb,src,dst) == 0) {
1371                 /* only to free rxb, and not submit the packets to upper layer */
1372                 for(i =0; i < rxb->nr_subframes; i++) {
1373                         dev_kfree_skb(rxb->subframes[i]);
1374                 }
1375                 kfree(rxb);
1376                 rxb = NULL;
1377                 goto rx_dropped;
1378         }
1379
1380         ieee->last_rx_ps_time = jiffies;
1381 //added by amy for reorder
1382         if(ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL){
1383 //added by amy for reorder
1384                 for(i = 0; i<rxb->nr_subframes; i++) {
1385                         struct sk_buff *sub_skb = rxb->subframes[i];
1386
1387                         if (sub_skb) {
1388                                 /* convert hdr + possible LLC headers into Ethernet header */
1389                                 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1390                                 if (sub_skb->len >= 8 &&
1391                                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1392                                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1393                                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1394                                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
1395                                          * replace EtherType */
1396                                         skb_pull(sub_skb, SNAP_SIZE);
1397                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1398                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1399                                 } else {
1400                                         u16 len;
1401                                         /* Leave Ethernet header part of hdr and full payload */
1402                                         len = htons(sub_skb->len);
1403                                         memcpy(skb_push(sub_skb, 2), &len, 2);
1404                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1405                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1406                                 }
1407
1408                                 stats->rx_packets++;
1409                                 stats->rx_bytes += sub_skb->len;
1410                                 if(is_multicast_ether_addr(dst)) {
1411                                         stats->multicast++;
1412                                 }
1413
1414                                 /* Indicat the packets to upper layer */
1415                                 //printk("0skb_len(%d)\n", skb->len);
1416                                 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1417                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1418                                 sub_skb->dev = dev;
1419                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1420                                 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
1421                                 //printk("1skb_len(%d)\n", skb->len);
1422                                 netif_rx(sub_skb);
1423                         }
1424                 }
1425                 kfree(rxb);
1426                 rxb = NULL;
1427
1428         }
1429         else
1430         {
1431                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__FUNCTION__);
1432                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1433         }
1434 #ifndef JOHN_NOCPY
1435         dev_kfree_skb(skb);
1436 #endif
1437
1438  rx_exit:
1439 #ifdef NOT_YET
1440         if (sta)
1441                 hostap_handle_sta_release(sta);
1442 #endif
1443         return 1;
1444
1445  rx_dropped:
1446         if (rxb != NULL)
1447         {
1448                 kfree(rxb);
1449                 rxb = NULL;
1450         }
1451         stats->rx_dropped++;
1452
1453         /* Returning 0 indicates to caller that we have not handled the SKB--
1454          * so it is still allocated and can be used again by underlying
1455          * hardware as a DMA target */
1456         return 0;
1457 }
1458
1459 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
1460
1461 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1462
1463 /*
1464 * Make ther structure we read from the beacon packet has
1465 * the right values
1466 */
1467 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1468                                      *info_element, int sub_type)
1469 {
1470
1471         if (info_element->qui_subtype != sub_type)
1472                 return -1;
1473         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1474                 return -1;
1475         if (info_element->qui_type != QOS_OUI_TYPE)
1476                 return -1;
1477         if (info_element->version != QOS_VERSION_1)
1478                 return -1;
1479
1480         return 0;
1481 }
1482
1483
1484 /*
1485  * Parse a QoS parameter element
1486  */
1487 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
1488                                             *element_param, struct ieee80211_info_element
1489                                             *info_element)
1490 {
1491         int ret = 0;
1492         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
1493
1494         if ((info_element == NULL) || (element_param == NULL))
1495                 return -1;
1496
1497         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1498                 memcpy(element_param->info_element.qui, info_element->data,
1499                        info_element->len);
1500                 element_param->info_element.elementID = info_element->id;
1501                 element_param->info_element.length = info_element->len;
1502         } else
1503                 ret = -1;
1504         if (ret == 0)
1505                 ret = ieee80211_verify_qos_info(&element_param->info_element,
1506                                                 QOS_OUI_PARAM_SUB_TYPE);
1507         return ret;
1508 }
1509
1510 /*
1511  * Parse a QoS information element
1512  */
1513 static int ieee80211_read_qos_info_element(struct
1514                                            ieee80211_qos_information_element
1515                                            *element_info, struct ieee80211_info_element
1516                                            *info_element)
1517 {
1518         int ret = 0;
1519         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1520
1521         if (element_info == NULL)
1522                 return -1;
1523         if (info_element == NULL)
1524                 return -1;
1525
1526         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1527                 memcpy(element_info->qui, info_element->data,
1528                        info_element->len);
1529                 element_info->elementID = info_element->id;
1530                 element_info->length = info_element->len;
1531         } else
1532                 ret = -1;
1533
1534         if (ret == 0)
1535                 ret = ieee80211_verify_qos_info(element_info,
1536                                                 QOS_OUI_INFO_SUB_TYPE);
1537         return ret;
1538 }
1539
1540
1541 /*
1542  * Write QoS parameters from the ac parameters.
1543  */
1544 static int ieee80211_qos_convert_ac_to_parameters(struct
1545                                                   ieee80211_qos_parameter_info
1546                                                   *param_elm, struct
1547                                                   ieee80211_qos_parameters
1548                                                   *qos_param)
1549 {
1550         int rc = 0;
1551         int i;
1552         struct ieee80211_qos_ac_parameter *ac_params;
1553         u8 aci;
1554         //u8 cw_min;
1555         //u8 cw_max;
1556
1557         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1558                 ac_params = &(param_elm->ac_params_record[i]);
1559
1560                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1561
1562                 if(aci >= QOS_QUEUE_NUM)
1563                         continue;
1564                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1565
1566                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1567                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1568
1569                 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1570
1571                 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1572
1573                 qos_param->flag[aci] =
1574                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1575                 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1576         }
1577         return rc;
1578 }
1579
1580 /*
1581  * we have a generic data element which it may contain QoS information or
1582  * parameters element. check the information element length to decide
1583  * which type to read
1584  */
1585 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1586                                              *info_element,
1587                                              struct ieee80211_network *network)
1588 {
1589         int rc = 0;
1590         struct ieee80211_qos_parameters *qos_param = NULL;
1591         struct ieee80211_qos_information_element qos_info_element;
1592
1593         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1594
1595         if (rc == 0) {
1596                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1597                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1598         } else {
1599                 struct ieee80211_qos_parameter_info param_element;
1600
1601                 rc = ieee80211_read_qos_param_element(&param_element,
1602                                                       info_element);
1603                 if (rc == 0) {
1604                         qos_param = &(network->qos_data.parameters);
1605                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1606                                                                qos_param);
1607                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1608                         network->qos_data.param_count =
1609                             param_element.info_element.ac_info & 0x0F;
1610                 }
1611         }
1612
1613         if (rc == 0) {
1614                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1615                 network->qos_data.supported = 1;
1616         }
1617         return rc;
1618 }
1619
1620 #ifdef CONFIG_IEEE80211_DEBUG
1621 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1622
1623 static const char *get_info_element_string(u16 id)
1624 {
1625         switch (id) {
1626                 MFIE_STRING(SSID);
1627                 MFIE_STRING(RATES);
1628                 MFIE_STRING(FH_SET);
1629                 MFIE_STRING(DS_SET);
1630                 MFIE_STRING(CF_SET);
1631                 MFIE_STRING(TIM);
1632                 MFIE_STRING(IBSS_SET);
1633                 MFIE_STRING(COUNTRY);
1634                 MFIE_STRING(HOP_PARAMS);
1635                 MFIE_STRING(HOP_TABLE);
1636                 MFIE_STRING(REQUEST);
1637                 MFIE_STRING(CHALLENGE);
1638                 MFIE_STRING(POWER_CONSTRAINT);
1639                 MFIE_STRING(POWER_CAPABILITY);
1640                 MFIE_STRING(TPC_REQUEST);
1641                 MFIE_STRING(TPC_REPORT);
1642                 MFIE_STRING(SUPP_CHANNELS);
1643                 MFIE_STRING(CSA);
1644                 MFIE_STRING(MEASURE_REQUEST);
1645                 MFIE_STRING(MEASURE_REPORT);
1646                 MFIE_STRING(QUIET);
1647                 MFIE_STRING(IBSS_DFS);
1648                // MFIE_STRING(ERP_INFO);
1649                 MFIE_STRING(RSN);
1650                 MFIE_STRING(RATES_EX);
1651                 MFIE_STRING(GENERIC);
1652                 MFIE_STRING(QOS_PARAMETER);
1653         default:
1654                 return "UNKNOWN";
1655         }
1656 }
1657 #endif
1658
1659 #ifdef ENABLE_DOT11D
1660 static inline void ieee80211_extract_country_ie(
1661         struct ieee80211_device *ieee,
1662         struct ieee80211_info_element *info_element,
1663         struct ieee80211_network *network,
1664         u8 * addr2
1665 )
1666 {
1667         if(IS_DOT11D_ENABLE(ieee))
1668         {
1669                 if(info_element->len!= 0)
1670                 {
1671                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1672                         network->CountryIeLen = info_element->len;
1673
1674                         if(!IS_COUNTRY_IE_VALID(ieee))
1675                         {
1676                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1677                         }
1678                 }
1679
1680                 //
1681                 // 070305, rcnjko: I update country IE watch dog here because
1682                 // some AP (e.g. Cisco 1242) don't include country IE in their
1683                 // probe response frame.
1684                 //
1685                 if(IS_EQUAL_CIE_SRC(ieee, addr2) )
1686                 {
1687                         UPDATE_CIE_WATCHDOG(ieee);
1688                 }
1689         }
1690
1691 }
1692 #endif
1693
1694 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1695                 struct ieee80211_info_element *info_element,
1696                 u16 length,
1697                 struct ieee80211_network *network,
1698                 struct ieee80211_rx_stats *stats)
1699 {
1700         u8 i;
1701         short offset;
1702         u16     tmp_htcap_len=0;
1703         u16     tmp_htinfo_len=0;
1704         u16 ht_realtek_agg_len=0;
1705         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1706 //      u16 broadcom_len = 0;
1707 #ifdef CONFIG_IEEE80211_DEBUG
1708         char rates_str[64];
1709         char *p;
1710 #endif
1711
1712         while (length >= sizeof(*info_element)) {
1713                 if (sizeof(*info_element) + info_element->len > length) {
1714                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1715                                              "info_element->len + 2 > left : "
1716                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1717                                              info_element->len +
1718                                              sizeof(*info_element),
1719                                              length, info_element->id);
1720                         /* We stop processing but don't return an error here
1721                          * because some misbehaviour APs break this rule. ie.
1722                          * Orinoco AP1000. */
1723                         break;
1724                 }
1725
1726                 switch (info_element->id) {
1727                 case MFIE_TYPE_SSID:
1728                         if (ieee80211_is_empty_essid(info_element->data,
1729                                                      info_element->len)) {
1730                                 network->flags |= NETWORK_EMPTY_ESSID;
1731                                 break;
1732                         }
1733
1734                         network->ssid_len = min(info_element->len,
1735                                                 (u8) IW_ESSID_MAX_SIZE);
1736                         memcpy(network->ssid, info_element->data, network->ssid_len);
1737                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1738                                 memset(network->ssid + network->ssid_len, 0,
1739                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1740
1741                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1742                                              network->ssid, network->ssid_len);
1743                         break;
1744
1745                 case MFIE_TYPE_RATES:
1746 #ifdef CONFIG_IEEE80211_DEBUG
1747                         p = rates_str;
1748 #endif
1749                         network->rates_len = min(info_element->len,
1750                                                  MAX_RATES_LENGTH);
1751                         for (i = 0; i < network->rates_len; i++) {
1752                                 network->rates[i] = info_element->data[i];
1753 #ifdef CONFIG_IEEE80211_DEBUG
1754                                 p += snprintf(p, sizeof(rates_str) -
1755                                               (p - rates_str), "%02X ",
1756                                               network->rates[i]);
1757 #endif
1758                                 if (ieee80211_is_ofdm_rate
1759                                     (info_element->data[i])) {
1760                                         network->flags |= NETWORK_HAS_OFDM;
1761                                         if (info_element->data[i] &
1762                                             IEEE80211_BASIC_RATE_MASK)
1763                                                 network->flags &=
1764                                                     ~NETWORK_HAS_CCK;
1765                                 }
1766                         }
1767
1768                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1769                                              rates_str, network->rates_len);
1770                         break;
1771
1772                 case MFIE_TYPE_RATES_EX:
1773 #ifdef CONFIG_IEEE80211_DEBUG
1774                         p = rates_str;
1775 #endif
1776                         network->rates_ex_len = min(info_element->len,
1777                                                     MAX_RATES_EX_LENGTH);
1778                         for (i = 0; i < network->rates_ex_len; i++) {
1779                                 network->rates_ex[i] = info_element->data[i];
1780 #ifdef CONFIG_IEEE80211_DEBUG
1781                                 p += snprintf(p, sizeof(rates_str) -
1782                                               (p - rates_str), "%02X ",
1783                                               network->rates[i]);
1784 #endif
1785                                 if (ieee80211_is_ofdm_rate
1786                                     (info_element->data[i])) {
1787                                         network->flags |= NETWORK_HAS_OFDM;
1788                                         if (info_element->data[i] &
1789                                             IEEE80211_BASIC_RATE_MASK)
1790                                                 network->flags &=
1791                                                     ~NETWORK_HAS_CCK;
1792                                 }
1793                         }
1794
1795                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1796                                              rates_str, network->rates_ex_len);
1797                         break;
1798
1799                 case MFIE_TYPE_DS_SET:
1800                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1801                                              info_element->data[0]);
1802                         network->channel = info_element->data[0];
1803                         break;
1804
1805                 case MFIE_TYPE_FH_SET:
1806                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1807                         break;
1808
1809                 case MFIE_TYPE_CF_SET:
1810                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1811                         break;
1812
1813                 case MFIE_TYPE_TIM:
1814                         if(info_element->len < 4)
1815                                 break;
1816
1817                         network->tim.tim_count = info_element->data[0];
1818                         network->tim.tim_period = info_element->data[1];
1819
1820                         network->dtim_period = info_element->data[1];
1821                         if(ieee->state != IEEE80211_LINKED)
1822                                 break;
1823 #if 0
1824                         network->last_dtim_sta_time[0] = stats->mac_time[0];
1825 #else
1826                         //we use jiffies for legacy Power save
1827                         network->last_dtim_sta_time[0] = jiffies;
1828 #endif
1829                         network->last_dtim_sta_time[1] = stats->mac_time[1];
1830
1831                         network->dtim_data = IEEE80211_DTIM_VALID;
1832
1833                         if(info_element->data[0] != 0)
1834                                 break;
1835
1836                         if(info_element->data[2] & 1)
1837                                 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1838
1839                         offset = (info_element->data[2] >> 1)*2;
1840
1841                         //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
1842
1843                         if(ieee->assoc_id < 8*offset ||
1844                                 ieee->assoc_id > 8*(offset + info_element->len -3))
1845
1846                                 break;
1847
1848                         offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1849
1850                         if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1851                                 network->dtim_data |= IEEE80211_DTIM_UCAST;
1852
1853                         //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1854                         break;
1855
1856                 case MFIE_TYPE_ERP:
1857                         network->erp_value = info_element->data[0];
1858                         network->flags |= NETWORK_HAS_ERP_VALUE;
1859                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1860                                              network->erp_value);
1861                         break;
1862                 case MFIE_TYPE_IBSS_SET:
1863                         network->atim_window = info_element->data[0];
1864                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1865                                              network->atim_window);
1866                         break;
1867
1868                 case MFIE_TYPE_CHALLENGE:
1869                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1870                         break;
1871
1872                 case MFIE_TYPE_GENERIC:
1873                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1874                                              info_element->len);
1875                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1876                                                                network))
1877                                 break;
1878
1879                         if (info_element->len >= 4 &&
1880                             info_element->data[0] == 0x00 &&
1881                             info_element->data[1] == 0x50 &&
1882                             info_element->data[2] == 0xf2 &&
1883                             info_element->data[3] == 0x01) {
1884                                 network->wpa_ie_len = min(info_element->len + 2,
1885                                                           MAX_WPA_IE_LEN);
1886                                 memcpy(network->wpa_ie, info_element,
1887                                        network->wpa_ie_len);
1888                                 break;
1889                         }
1890
1891 #ifdef THOMAS_TURBO
1892                         if (info_element->len == 7 &&
1893                             info_element->data[0] == 0x00 &&
1894                             info_element->data[1] == 0xe0 &&
1895                             info_element->data[2] == 0x4c &&
1896                             info_element->data[3] == 0x01 &&
1897                             info_element->data[4] == 0x02) {
1898                                 network->Turbo_Enable = 1;
1899                         }
1900 #endif
1901
1902                         //for HTcap and HTinfo parameters
1903                         if(tmp_htcap_len == 0){
1904                                 if(info_element->len >= 4 &&
1905                                    info_element->data[0] == 0x00 &&
1906                                    info_element->data[1] == 0x90 &&
1907                                    info_element->data[2] == 0x4c &&
1908                                    info_element->data[3] == 0x033){
1909
1910                                                 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1911                                                 if(tmp_htcap_len != 0){
1912                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1913                                                         network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1914                                                                 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1915                                                         memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1916                                                 }
1917                                 }
1918                                 if(tmp_htcap_len != 0)
1919                                         network->bssht.bdSupportHT = true;
1920                                 else
1921                                         network->bssht.bdSupportHT = false;
1922                         }
1923
1924
1925                         if(tmp_htinfo_len == 0){
1926                                 if(info_element->len >= 4 &&
1927                                         info_element->data[0] == 0x00 &&
1928                                         info_element->data[1] == 0x90 &&
1929                                         info_element->data[2] == 0x4c &&
1930                                         info_element->data[3] == 0x034){
1931
1932                                                 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1933                                                 if(tmp_htinfo_len != 0){
1934                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1935                                                         if(tmp_htinfo_len){
1936                                                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1937                                                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1938                                                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1939                                                         }
1940
1941                                                 }
1942
1943                                 }
1944                         }
1945
1946                         if(ieee->aggregation){
1947                                 if(network->bssht.bdSupportHT){
1948                                         if(info_element->len >= 4 &&
1949                                                 info_element->data[0] == 0x00 &&
1950                                                 info_element->data[1] == 0xe0 &&
1951                                                 info_element->data[2] == 0x4c &&
1952                                                 info_element->data[3] == 0x02){
1953
1954                                                 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
1955                                                 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
1956
1957                                         }
1958                                         if(ht_realtek_agg_len >= 5){
1959                                                 network->bssht.bdRT2RTAggregation = true;
1960
1961                                                 if((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1962                                                 network->bssht.bdRT2RTLongSlotTime = true;
1963                                         }
1964                                 }
1965
1966                         }
1967
1968                         //if(tmp_htcap_len !=0  ||  tmp_htinfo_len != 0)
1969                         {
1970                                 if((info_element->len >= 3 &&
1971                                          info_element->data[0] == 0x00 &&
1972                                          info_element->data[1] == 0x05 &&
1973                                          info_element->data[2] == 0xb5) ||
1974                                          (info_element->len >= 3 &&
1975                                          info_element->data[0] == 0x00 &&
1976                                          info_element->data[1] == 0x0a &&
1977                                          info_element->data[2] == 0xf7) ||
1978                                          (info_element->len >= 3 &&
1979                                          info_element->data[0] == 0x00 &&
1980                                          info_element->data[1] == 0x10 &&
1981                                          info_element->data[2] == 0x18)){
1982
1983                                                 network->broadcom_cap_exist = true;
1984
1985                                 }
1986                         }
1987 #if 0
1988                         if (tmp_htcap_len !=0)
1989                                 {
1990                                         u16 cap_ext = ((PHT_CAPABILITY_ELE)&info_element->data[0])->ExtHTCapInfo;
1991                                         if ((cap_ext & 0x0c00) == 0x0c00)
1992                                                 {
1993                                                         network->ralink_cap_exist = true;
1994                                                 }
1995                                 }
1996 #endif
1997                         if(info_element->len >= 3 &&
1998                                 info_element->data[0] == 0x00 &&
1999                                 info_element->data[1] == 0x0c &&
2000                                 info_element->data[2] == 0x43)
2001                         {
2002                                 network->ralink_cap_exist = true;
2003                         }
2004                         else
2005                                 network->ralink_cap_exist = false;
2006                         //added by amy for atheros AP
2007                         if((info_element->len >= 3 &&
2008                                 info_element->data[0] == 0x00 &&
2009                                 info_element->data[1] == 0x03 &&
2010                                 info_element->data[2] == 0x7f) ||
2011                                 (info_element->len >= 3 &&
2012                                 info_element->data[0] == 0x00 &&
2013                                 info_element->data[1] == 0x13 &&
2014                                 info_element->data[2] == 0x74))
2015                         {
2016                                 printk("========>%s(): athros AP is exist\n",__FUNCTION__);
2017                                 network->atheros_cap_exist = true;
2018                         }
2019                         else
2020                                 network->atheros_cap_exist = false;
2021
2022                         if(info_element->len >= 3 &&
2023                                 info_element->data[0] == 0x00 &&
2024                                 info_element->data[1] == 0x40 &&
2025                                 info_element->data[2] == 0x96)
2026                         {
2027                                 network->cisco_cap_exist = true;
2028                         }
2029                         else
2030                                 network->cisco_cap_exist = false;
2031                         //added by amy for LEAP of cisco
2032                         if(info_element->len > 4 &&
2033                                 info_element->data[0] == 0x00 &&
2034                                 info_element->data[1] == 0x40 &&
2035                                 info_element->data[2] == 0x96 &&
2036                                 info_element->data[3] == 0x01)
2037                         {
2038                                 if(info_element->len == 6)
2039                                 {
2040                                         memcpy(network->CcxRmState, &info_element[4], 2);
2041                                         if(network->CcxRmState[0] != 0)
2042                                         {
2043                                                 network->bCcxRmEnable = true;
2044                                         }
2045                                         else
2046                                                 network->bCcxRmEnable = false;
2047                                         //
2048                                         // CCXv4 Table 59-1 MBSSID Masks.
2049                                         //
2050                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
2051                                         if(network->MBssidMask != 0)
2052                                         {
2053                                                 network->bMBssidValid = true;
2054                                                 network->MBssidMask = 0xff << (network->MBssidMask);
2055                                                 cpMacAddr(network->MBssid, network->bssid);
2056                                                 network->MBssid[5] &= network->MBssidMask;
2057                                         }
2058                                         else
2059                                         {
2060                                                 network->bMBssidValid = false;
2061                                         }
2062                                 }
2063                                 else
2064                                 {
2065                                         network->bCcxRmEnable = false;
2066                                 }
2067                         }
2068                         if(info_element->len > 4  &&
2069                                 info_element->data[0] == 0x00 &&
2070                                 info_element->data[1] == 0x40 &&
2071                                 info_element->data[2] == 0x96 &&
2072                                 info_element->data[3] == 0x03)
2073                         {
2074                                 if(info_element->len == 5)
2075                                 {
2076                                         network->bWithCcxVerNum = true;
2077                                         network->BssCcxVerNumber = info_element->data[4];
2078                                 }
2079                                 else
2080                                 {
2081                                         network->bWithCcxVerNum = false;
2082                                         network->BssCcxVerNumber = 0;
2083                                 }
2084                         }
2085                         break;
2086
2087                 case MFIE_TYPE_RSN:
2088                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2089                                              info_element->len);
2090                         network->rsn_ie_len = min(info_element->len + 2,
2091                                                   MAX_WPA_IE_LEN);
2092                         memcpy(network->rsn_ie, info_element,
2093                                network->rsn_ie_len);
2094                         break;
2095
2096                         //HT related element.
2097                 case MFIE_TYPE_HT_CAP:
2098                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2099                                              info_element->len);
2100                         tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
2101                         if(tmp_htcap_len != 0){
2102                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2103                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
2104                                         sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
2105                                 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
2106
2107                                 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
2108                                 // windows driver will update WMM parameters each beacon received once connected
2109                                 // Linux driver is a bit different.
2110                                 network->bssht.bdSupportHT = true;
2111                         }
2112                         else
2113                                 network->bssht.bdSupportHT = false;
2114                         break;
2115
2116
2117                 case MFIE_TYPE_HT_INFO:
2118                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2119                                              info_element->len);
2120                         tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2121                         if(tmp_htinfo_len){
2122                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2123                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2124                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2125                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2126                         }
2127                         break;
2128
2129                 case MFIE_TYPE_AIRONET:
2130                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2131                                              info_element->len);
2132                         if(info_element->len >IE_CISCO_FLAG_POSITION)
2133                         {
2134                                 network->bWithAironetIE = true;
2135
2136                                 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
2137                                 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
2138                                 //  by adding an Aironet element and setting one or both of the CKIP negotiation bits."
2139                                 if(     (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC)   ||
2140                                         (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK)    )
2141                                 {
2142                                         network->bCkipSupported = true;
2143                                 }
2144                                 else
2145                                 {
2146                                         network->bCkipSupported = false;
2147                                 }
2148                         }
2149                         else
2150                         {
2151                                 network->bWithAironetIE = false;
2152                                 network->bCkipSupported = false;
2153                         }
2154                         break;
2155                 case MFIE_TYPE_QOS_PARAMETER:
2156                         printk(KERN_ERR
2157                                "QoS Error need to parse QOS_PARAMETER IE\n");
2158                         break;
2159
2160 #ifdef ENABLE_DOT11D
2161                 case MFIE_TYPE_COUNTRY:
2162                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2163                                              info_element->len);
2164                         //printk("=====>Receive <%s> Country IE\n",network->ssid);
2165                         ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
2166                         break;
2167 #endif
2168 /* TODO */
2169 #if 0
2170                         /* 802.11h */
2171                 case MFIE_TYPE_POWER_CONSTRAINT:
2172                         network->power_constraint = info_element->data[0];
2173                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
2174                         break;
2175
2176                 case MFIE_TYPE_CSA:
2177                         network->power_constraint = info_element->data[0];
2178                         network->flags |= NETWORK_HAS_CSA;
2179                         break;
2180
2181                 case MFIE_TYPE_QUIET:
2182                         network->quiet.count = info_element->data[0];
2183                         network->quiet.period = info_element->data[1];
2184                         network->quiet.duration = info_element->data[2];
2185                         network->quiet.offset = info_element->data[3];
2186                         network->flags |= NETWORK_HAS_QUIET;
2187                         break;
2188
2189                 case MFIE_TYPE_IBSS_DFS:
2190                         if (network->ibss_dfs)
2191                                 break;
2192                         network->ibss_dfs = kmemdup(info_element->data,
2193                                                     info_element->len,
2194                                                     GFP_ATOMIC);
2195                         if (!network->ibss_dfs)
2196                                 return 1;
2197                         network->flags |= NETWORK_HAS_IBSS_DFS;
2198                         break;
2199
2200                 case MFIE_TYPE_TPC_REPORT:
2201                         network->tpc_report.transmit_power =
2202                             info_element->data[0];
2203                         network->tpc_report.link_margin = info_element->data[1];
2204                         network->flags |= NETWORK_HAS_TPC_REPORT;
2205                         break;
2206 #endif
2207                 default:
2208                         IEEE80211_DEBUG_MGMT
2209                             ("Unsupported info element: %s (%d)\n",
2210                              get_info_element_string(info_element->id),
2211                              info_element->id);
2212                         break;
2213                 }
2214
2215                 length -= sizeof(*info_element) + info_element->len;
2216                 info_element =
2217                     (struct ieee80211_info_element *)&info_element->
2218                     data[info_element->len];
2219         }
2220
2221         if(!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2222                 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2223         {
2224                 network->unknown_cap_exist = true;
2225         }
2226         else
2227         {
2228                 network->unknown_cap_exist = false;
2229         }
2230         return 0;
2231 }
2232
2233 static inline u8 ieee80211_SignalStrengthTranslate(
2234         u8  CurrSS
2235         )
2236 {
2237         u8 RetSS;
2238
2239         // Step 1. Scale mapping.
2240         if(CurrSS >= 71 && CurrSS <= 100)
2241         {
2242                 RetSS = 90 + ((CurrSS - 70) / 3);
2243         }
2244         else if(CurrSS >= 41 && CurrSS <= 70)
2245         {
2246                 RetSS = 78 + ((CurrSS - 40) / 3);
2247         }
2248         else if(CurrSS >= 31 && CurrSS <= 40)
2249         {
2250                 RetSS = 66 + (CurrSS - 30);
2251         }
2252         else if(CurrSS >= 21 && CurrSS <= 30)
2253         {
2254                 RetSS = 54 + (CurrSS - 20);
2255         }
2256         else if(CurrSS >= 5 && CurrSS <= 20)
2257         {
2258                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2259         }
2260         else if(CurrSS == 4)
2261         {
2262                 RetSS = 36;
2263         }
2264         else if(CurrSS == 3)
2265         {
2266                 RetSS = 27;
2267         }
2268         else if(CurrSS == 2)
2269         {
2270                 RetSS = 18;
2271         }
2272         else if(CurrSS == 1)
2273         {
2274                 RetSS = 9;
2275         }
2276         else
2277         {
2278                 RetSS = CurrSS;
2279         }
2280         //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2281
2282         // Step 2. Smoothing.
2283
2284         //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2285
2286         return RetSS;
2287 }
2288
2289 long ieee80211_translate_todbm(u8 signal_strength_index )// 0-100 index.
2290 {
2291         long    signal_power; // in dBm.
2292
2293         // Translate to dBm (x=0.5y-95).
2294         signal_power = (long)((signal_strength_index + 1) >> 1);
2295         signal_power -= 95;
2296
2297         return signal_power;
2298 }
2299
2300 static inline int ieee80211_network_init(
2301         struct ieee80211_device *ieee,
2302         struct ieee80211_probe_response *beacon,
2303         struct ieee80211_network *network,
2304         struct ieee80211_rx_stats *stats)
2305 {
2306 #ifdef CONFIG_IEEE80211_DEBUG
2307         //char rates_str[64];
2308         //char *p;
2309 #endif
2310
2311         network->qos_data.active = 0;
2312         network->qos_data.supported = 0;
2313         network->qos_data.param_count = 0;
2314         network->qos_data.old_param_count = 0;
2315
2316         /* Pull out fixed field data */
2317         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2318         network->capability = le16_to_cpu(beacon->capability);
2319         network->last_scanned = jiffies;
2320         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2321         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2322         network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
2323         /* Where to pull this? beacon->listen_interval;*/
2324         network->listen_interval = 0x0A;
2325         network->rates_len = network->rates_ex_len = 0;
2326         network->last_associate = 0;
2327         network->ssid_len = 0;
2328         network->flags = 0;
2329         network->atim_window = 0;
2330         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2331             0x3 : 0x0;
2332         network->berp_info_valid = false;
2333         network->broadcom_cap_exist = false;
2334         network->ralink_cap_exist = false;
2335         network->atheros_cap_exist = false;
2336         network->cisco_cap_exist = false;
2337         network->unknown_cap_exist = false;
2338 #ifdef THOMAS_TURBO
2339         network->Turbo_Enable = 0;
2340 #endif
2341 #ifdef ENABLE_DOT11D
2342         network->CountryIeLen = 0;
2343         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2344 #endif
2345 //Initialize HT parameters
2346         //ieee80211_ht_initialize(&network->bssht);
2347         HTInitializeBssDesc(&network->bssht);
2348         if (stats->freq == IEEE80211_52GHZ_BAND) {
2349                 /* for A band (No DS info) */
2350                 network->channel = stats->received_channel;
2351         } else
2352                 network->flags |= NETWORK_HAS_CCK;
2353
2354         network->wpa_ie_len = 0;
2355         network->rsn_ie_len = 0;
2356
2357         if (ieee80211_parse_info_param
2358             (ieee,beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2359                 return 1;
2360
2361         network->mode = 0;
2362         if (stats->freq == IEEE80211_52GHZ_BAND)
2363                 network->mode = IEEE_A;
2364         else {
2365                 if (network->flags & NETWORK_HAS_OFDM)
2366                         network->mode |= IEEE_G;
2367                 if (network->flags & NETWORK_HAS_CCK)
2368                         network->mode |= IEEE_B;
2369         }
2370
2371         if (network->mode == 0) {
2372                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
2373                                      "network.\n",
2374                                      escape_essid(network->ssid,
2375                                                   network->ssid_len),
2376                                      MAC_ARG(network->bssid));
2377                 return 1;
2378         }
2379
2380         if(network->bssht.bdSupportHT){
2381                 if(network->mode == IEEE_A)
2382                         network->mode = IEEE_N_5G;
2383                 else if(network->mode & (IEEE_G | IEEE_B))
2384                         network->mode = IEEE_N_24G;
2385         }
2386         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2387                 network->flags |= NETWORK_EMPTY_ESSID;
2388
2389 #if 1
2390         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2391         //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2392         stats->noise = ieee80211_translate_todbm((u8)(100-stats->signal)) -25;
2393 #endif
2394
2395         memcpy(&network->stats, stats, sizeof(network->stats));
2396
2397         return 0;
2398 }
2399
2400 static inline int is_same_network(struct ieee80211_network *src,
2401                                   struct ieee80211_network *dst, struct ieee80211_device* ieee)
2402 {
2403         /* A network is only a duplicate if the channel, BSSID, ESSID
2404          * and the capability field (in particular IBSS and BSS) all match.
2405          * We treat all <hidden> with the same BSSID and channel
2406          * as one network */
2407         return //((src->ssid_len == dst->ssid_len) &&
2408                 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2409                 (src->channel == dst->channel) &&
2410                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2411                 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2412                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2413                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2414                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2415                 ((src->capability & WLAN_CAPABILITY_BSS) ==
2416                 (dst->capability & WLAN_CAPABILITY_BSS)));
2417 }
2418
2419 static inline void update_network(struct ieee80211_network *dst,
2420                                   struct ieee80211_network *src)
2421 {
2422         int qos_active;
2423         u8 old_param;
2424
2425         memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2426         dst->capability = src->capability;
2427         memcpy(dst->rates, src->rates, src->rates_len);
2428         dst->rates_len = src->rates_len;
2429         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2430         dst->rates_ex_len = src->rates_ex_len;
2431         if(src->ssid_len > 0)
2432         {
2433                 memset(dst->ssid, 0, dst->ssid_len);
2434                 dst->ssid_len = src->ssid_len;
2435                 memcpy(dst->ssid, src->ssid, src->ssid_len);
2436         }
2437         dst->mode = src->mode;
2438         dst->flags = src->flags;
2439         dst->time_stamp[0] = src->time_stamp[0];
2440         dst->time_stamp[1] = src->time_stamp[1];
2441         if (src->flags & NETWORK_HAS_ERP_VALUE)
2442         {
2443                 dst->erp_value = src->erp_value;
2444                 dst->berp_info_valid = src->berp_info_valid = true;
2445         }
2446         dst->beacon_interval = src->beacon_interval;
2447         dst->listen_interval = src->listen_interval;
2448         dst->atim_window = src->atim_window;
2449         dst->dtim_period = src->dtim_period;
2450         dst->dtim_data = src->dtim_data;
2451         dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2452         dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2453         memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2454
2455         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2456         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2457         dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2458         memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2459         dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2460         memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2461         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2462         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2463         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2464         dst->ralink_cap_exist = src->ralink_cap_exist;
2465         dst->atheros_cap_exist = src->atheros_cap_exist;
2466         dst->cisco_cap_exist = src->cisco_cap_exist;
2467         dst->unknown_cap_exist = src->unknown_cap_exist;
2468         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2469         dst->wpa_ie_len = src->wpa_ie_len;
2470         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2471         dst->rsn_ie_len = src->rsn_ie_len;
2472
2473         dst->last_scanned = jiffies;
2474         /* qos related parameters */
2475         //qos_active = src->qos_data.active;
2476         qos_active = dst->qos_data.active;
2477         //old_param = dst->qos_data.old_param_count;
2478         old_param = dst->qos_data.param_count;
2479         if(dst->flags & NETWORK_HAS_QOS_MASK){
2480         //not update QOS paramter in beacon, as most AP will set all these parameter to 0.//WB
2481         //      printk("====>%s(), aifs:%x, %x\n", __FUNCTION__, dst->qos_data.parameters.aifs[0], src->qos_data.parameters.aifs[0]);
2482         //      memcpy(&dst->qos_data, &src->qos_data,
2483         //              sizeof(struct ieee80211_qos_data));
2484         }
2485         else {
2486                 dst->qos_data.supported = src->qos_data.supported;
2487                 dst->qos_data.param_count = src->qos_data.param_count;
2488         }
2489
2490         if(dst->qos_data.supported == 1) {
2491                 dst->QoS_Enable = 1;
2492                 if(dst->ssid_len)
2493                         IEEE80211_DEBUG_QOS
2494                                 ("QoS the network %s is QoS supported\n",
2495                                 dst->ssid);
2496                 else
2497                         IEEE80211_DEBUG_QOS
2498                                 ("QoS the network is QoS supported\n");
2499         }
2500         dst->qos_data.active = qos_active;
2501         dst->qos_data.old_param_count = old_param;
2502
2503         /* dst->last_associate is not overwritten */
2504 #if 1
2505         dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2506         if(src->wmm_param[0].ac_aci_acm_aifsn|| \
2507            src->wmm_param[1].ac_aci_acm_aifsn|| \
2508            src->wmm_param[2].ac_aci_acm_aifsn|| \
2509            src->wmm_param[1].ac_aci_acm_aifsn) {
2510           memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2511         }
2512         //dst->QoS_Enable = src->QoS_Enable;
2513 #else
2514         dst->QoS_Enable = 1;//for Rtl8187 simulation
2515 #endif
2516 #ifdef THOMAS_TURBO
2517         dst->Turbo_Enable = src->Turbo_Enable;
2518 #endif
2519
2520 #ifdef ENABLE_DOT11D
2521         dst->CountryIeLen = src->CountryIeLen;
2522         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2523 #endif
2524
2525         //added by amy for LEAP
2526         dst->bWithAironetIE = src->bWithAironetIE;
2527         dst->bCkipSupported = src->bCkipSupported;
2528         memcpy(dst->CcxRmState,src->CcxRmState,2);
2529         dst->bCcxRmEnable = src->bCcxRmEnable;
2530         dst->MBssidMask = src->MBssidMask;
2531         dst->bMBssidValid = src->bMBssidValid;
2532         memcpy(dst->MBssid,src->MBssid,6);
2533         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2534         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2535
2536 }
2537
2538 static inline int is_beacon(__le16 fc)
2539 {
2540         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2541 }
2542
2543 static inline void ieee80211_process_probe_response(
2544         struct ieee80211_device *ieee,
2545         struct ieee80211_probe_response *beacon,
2546         struct ieee80211_rx_stats *stats)
2547 {
2548         struct ieee80211_network network;
2549         struct ieee80211_network *target;
2550         struct ieee80211_network *oldest = NULL;
2551 #ifdef CONFIG_IEEE80211_DEBUG
2552         struct ieee80211_info_element *info_element = &beacon->info_element[0];
2553 #endif
2554         unsigned long flags;
2555         short renew;
2556         //u8 wmm_info;
2557
2558         memset(&network, 0, sizeof(struct ieee80211_network));
2559         IEEE80211_DEBUG_SCAN(
2560                 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2561                 escape_essid(info_element->data, info_element->len),
2562                 MAC_ARG(beacon->header.addr3),
2563                 (beacon->capability & (1<<0xf)) ? '1' : '0',
2564                 (beacon->capability & (1<<0xe)) ? '1' : '0',
2565                 (beacon->capability & (1<<0xd)) ? '1' : '0',
2566                 (beacon->capability & (1<<0xc)) ? '1' : '0',
2567                 (beacon->capability & (1<<0xb)) ? '1' : '0',
2568                 (beacon->capability & (1<<0xa)) ? '1' : '0',
2569                 (beacon->capability & (1<<0x9)) ? '1' : '0',
2570                 (beacon->capability & (1<<0x8)) ? '1' : '0',
2571                 (beacon->capability & (1<<0x7)) ? '1' : '0',
2572                 (beacon->capability & (1<<0x6)) ? '1' : '0',
2573                 (beacon->capability & (1<<0x5)) ? '1' : '0',
2574                 (beacon->capability & (1<<0x4)) ? '1' : '0',
2575                 (beacon->capability & (1<<0x3)) ? '1' : '0',
2576                 (beacon->capability & (1<<0x2)) ? '1' : '0',
2577                 (beacon->capability & (1<<0x1)) ? '1' : '0',
2578                 (beacon->capability & (1<<0x0)) ? '1' : '0');
2579
2580         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
2581                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
2582                                      escape_essid(info_element->data,
2583                                                   info_element->len),
2584                                      MAC_ARG(beacon->header.addr3),
2585                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2586                                      IEEE80211_STYPE_PROBE_RESP ?
2587                                      "PROBE RESPONSE" : "BEACON");
2588                 return;
2589         }
2590
2591 #ifdef ENABLE_DOT11D
2592         // For Asus EeePc request,
2593         // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2594         //         wireless adapter should follow the country code.
2595         // (2)  If there is no any country code in beacon,
2596         //       then wireless adapter should do active scan from ch1~11 and
2597         //       passive scan from ch12~14
2598
2599         if( !IsLegalChannel(ieee, network.channel) )
2600                 return;
2601         if(ieee->bGlobalDomain)
2602         {
2603                 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP)
2604                 {
2605                         // Case 1: Country code
2606                         if(IS_COUNTRY_IE_VALID(ieee) )
2607                         {
2608                                 if( !IsLegalChannel(ieee, network.channel) )
2609                                 {
2610                                         printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
2611                                         return;
2612                                 }
2613                         }
2614                         // Case 2: No any country code.
2615                         else
2616                         {
2617                                 // Filter over channel ch12~14
2618                                 if(network.channel > 11)
2619                                 {
2620                                         printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
2621                                         return;
2622                                 }
2623                         }
2624                 }
2625                 else
2626                 {
2627                         // Case 1: Country code
2628                         if(IS_COUNTRY_IE_VALID(ieee) )
2629                         {
2630                                 if( !IsLegalChannel(ieee, network.channel) )
2631                                 {
2632                                         printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel);
2633                                         return;
2634                                 }
2635                         }
2636                         // Case 2: No any country code.
2637                         else
2638                         {
2639                                 // Filter over channel ch12~14
2640                                 if(network.channel > 14)
2641                                 {
2642                                         printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel);
2643                                         return;
2644                                 }
2645                         }
2646                 }
2647         }
2648 #endif
2649
2650         /* The network parsed correctly -- so now we scan our known networks
2651          * to see if we can find it in our list.
2652          *
2653          * NOTE:  This search is definitely not optimized.  Once its doing
2654          *        the "right thing" we'll optimize it for efficiency if
2655          *        necessary */
2656
2657         /* Search for this entry in the list and update it if it is
2658          * already there. */
2659
2660         spin_lock_irqsave(&ieee->lock, flags);
2661
2662         if(is_same_network(&ieee->current_network, &network, ieee)) {
2663                 update_network(&ieee->current_network, &network);
2664                 if((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2665                 && ieee->current_network.berp_info_valid){
2666                 if(ieee->current_network.erp_value& ERP_UseProtection)
2667                         ieee->current_network.buseprotection = true;
2668                 else
2669                         ieee->current_network.buseprotection = false;
2670                 }
2671                 if(is_beacon(beacon->header.frame_ctl))
2672                 {
2673                         if(ieee->state == IEEE80211_LINKED)
2674                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2675                 }
2676                 else //hidden AP
2677                         network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2678         }
2679
2680         list_for_each_entry(target, &ieee->network_list, list) {
2681                 if (is_same_network(target, &network, ieee))
2682                         break;
2683                 if ((oldest == NULL) ||
2684                     (target->last_scanned < oldest->last_scanned))
2685                         oldest = target;
2686         }
2687
2688         /* If we didn't find a match, then get a new network slot to initialize
2689          * with this beacon's information */
2690         if (&target->list == &ieee->network_list) {
2691                 if (list_empty(&ieee->network_free_list)) {
2692                         /* If there are no more slots, expire the oldest */
2693                         list_del(&oldest->list);
2694                         target = oldest;
2695                         IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
2696                                              "network list.\n",
2697                                              escape_essid(target->ssid,
2698                                                           target->ssid_len),
2699                                              MAC_ARG(target->bssid));
2700                 } else {
2701                         /* Otherwise just pull from the free list */
2702                         target = list_entry(ieee->network_free_list.next,
2703                                             struct ieee80211_network, list);
2704                         list_del(ieee->network_free_list.next);
2705                 }
2706
2707
2708 #ifdef CONFIG_IEEE80211_DEBUG
2709                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
2710                                      escape_essid(network.ssid,
2711                                                   network.ssid_len),
2712                                      MAC_ARG(network.bssid),
2713                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2714                                      IEEE80211_STYPE_PROBE_RESP ?
2715                                      "PROBE RESPONSE" : "BEACON");
2716 #endif
2717                 memcpy(target, &network, sizeof(*target));
2718                 list_add_tail(&target->list, &ieee->network_list);
2719                 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2720                         ieee80211_softmac_new_net(ieee,&network);
2721         } else {
2722                 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
2723                                      escape_essid(target->ssid,
2724                                                   target->ssid_len),
2725                                      MAC_ARG(target->bssid),
2726                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2727                                      IEEE80211_STYPE_PROBE_RESP ?
2728                                      "PROBE RESPONSE" : "BEACON");
2729
2730                 /* we have an entry and we are going to update it. But this entry may
2731                  * be already expired. In this case we do the same as we found a new
2732                  * net and call the new_net handler
2733                  */
2734                 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2735                 //YJ,add,080819,for hidden ap
2736                 if(is_beacon(beacon->header.frame_ctl) == 0)
2737                         network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
2738                 //if(strncmp(network.ssid, "linksys-c",9) == 0)
2739                 //      printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
2740                 if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2741                     && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
2742                     ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
2743                         renew = 1;
2744                 //YJ,add,080819,for hidden ap,end
2745
2746                 update_network(target, &network);
2747                 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2748                         ieee80211_softmac_new_net(ieee,&network);
2749         }
2750
2751         spin_unlock_irqrestore(&ieee->lock, flags);
2752         if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, &network, ieee)&&\
2753                 (ieee->state == IEEE80211_LINKED)) {
2754                 if(ieee->handle_beacon != NULL) {
2755                         ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
2756                 }
2757         }
2758 }
2759
2760 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2761                       struct ieee80211_hdr_4addr *header,
2762                       struct ieee80211_rx_stats *stats)
2763 {
2764         if(ieee->sta_sleep || (ieee->ps != IEEE80211_PS_DISABLED &&
2765                                 ieee->iw_mode == IW_MODE_INFRA &&
2766                                 ieee->state == IEEE80211_LINKED))
2767         {
2768                 tasklet_schedule(&ieee->ps_task);
2769         }
2770
2771         if(WLAN_FC_GET_STYPE(header->frame_ctl) != IEEE80211_STYPE_PROBE_RESP &&
2772                 WLAN_FC_GET_STYPE(header->frame_ctl) != IEEE80211_STYPE_BEACON)
2773                 ieee->last_rx_ps_time = jiffies;
2774
2775         switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2776
2777         case IEEE80211_STYPE_BEACON:
2778                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2779                                      WLAN_FC_GET_STYPE(header->frame_ctl));
2780                 IEEE80211_DEBUG_SCAN("Beacon\n");
2781                 ieee80211_process_probe_response(
2782                         ieee, (struct ieee80211_probe_response *)header, stats);
2783                 break;
2784
2785         case IEEE80211_STYPE_PROBE_RESP:
2786                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2787                                      WLAN_FC_GET_STYPE(header->frame_ctl));
2788                 IEEE80211_DEBUG_SCAN("Probe response\n");
2789                 ieee80211_process_probe_response(
2790                         ieee, (struct ieee80211_probe_response *)header, stats);
2791                 break;
2792
2793         }
2794 }
2795
2796 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
2797 //EXPORT_SYMBOL(ieee80211_rx_mgt);
2798 //EXPORT_SYMBOL(ieee80211_rx);
2799 #else
2800 EXPORT_SYMBOL_NOVERS(ieee80211_rx_mgt);
2801 EXPORT_SYMBOL_NOVERS(ieee80211_rx);
2802 #endif