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ieee80211_rx.c

/*
 * Original code based Host AP (software wireless LAN access point) driver
 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
 *
 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
 * <jkmaline@cc.hut.fi>
 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
 * Copyright (c) 2004, Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation. See README and COPYING for
 * more details.
 ******************************************************************************

  Few modifications for Realtek's Wi-Fi drivers by
  Andrea Merello <andreamrl@tiscali.it>

  A special thanks goes to Realtek for their support !

******************************************************************************/


#include <linux/compiler.h>
//#include <linux/config.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/in6.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/tcp.h>
#include <linux/types.h>
#include <linux/version.h>
#include <linux/wireless.h>
#include <linux/etherdevice.h>
#include <asm/uaccess.h>
#include <linux/ctype.h>

#include "ieee80211.h"
#ifdef ENABLE_DOT11D
#include "dot11d.h"
#endif
static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
                              struct sk_buff *skb,
                              struct ieee80211_rx_stats *rx_stats)
{
      struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *)skb->data;
      u16 fc = le16_to_cpu(hdr->frame_ctl);

      skb->dev = ieee->dev;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
        skb_reset_mac_header(skb);
#else
        skb->mac.raw = skb->data;
#endif

      skb_pull(skb, ieee80211_get_hdrlen(fc));
      skb->pkt_type = PACKET_OTHERHOST;
      skb->protocol = __constant_htons(ETH_P_80211_RAW);
      memset(skb->cb, 0, sizeof(skb->cb));
      netif_rx(skb);
}


/* Called only as a tasklet (software IRQ) */
static struct ieee80211_frag_entry *
ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
                    unsigned int frag, u8 tid,u8 *src, u8 *dst)
{
      struct ieee80211_frag_entry *entry;
      int i;

      for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
            entry = &ieee->frag_cache[tid][i];
            if (entry->skb != NULL &&
                time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
                  IEEE80211_DEBUG_FRAG(
                        "expiring fragment cache entry "
                        "seq=%u last_frag=%u\n",
                        entry->seq, entry->last_frag);
                  dev_kfree_skb_any(entry->skb);
                  entry->skb = NULL;
            }

            if (entry->skb != NULL && entry->seq == seq &&
                (entry->last_frag + 1 == frag || frag == -1) &&
                memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
                memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
                  return entry;
      }

      return NULL;
}

/* Called only as a tasklet (software IRQ) */
static struct sk_buff *
ieee80211_frag_cache_get(struct ieee80211_device *ieee,
                   struct ieee80211_hdr_4addr *hdr)
{
      struct sk_buff *skb = NULL;
      u16 fc = le16_to_cpu(hdr->frame_ctl);
      u16 sc = le16_to_cpu(hdr->seq_ctl);
      unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
      unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
      struct ieee80211_frag_entry *entry;
      struct ieee80211_hdr_3addrqos *hdr_3addrqos;
      struct ieee80211_hdr_4addrqos *hdr_4addrqos;
      u8 tid;

      if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
        hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
        tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
        tid = UP2AC(tid);
        tid ++;
      } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
        hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
        tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
        tid = UP2AC(tid);
        tid ++;
      } else {
        tid = 0;
      }

      if (frag == 0) {
            /* Reserve enough space to fit maximum frame length */
            skb = dev_alloc_skb(ieee->dev->mtu +
                            sizeof(struct ieee80211_hdr_4addr) +
                            8 /* LLC */ +
                            2 /* alignment */ +
                            8 /* WEP */ +
                            ETH_ALEN /* WDS */ +
                            (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
            if (skb == NULL)
                  return NULL;

            entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
            ieee->frag_next_idx[tid]++;
            if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
                  ieee->frag_next_idx[tid] = 0;

            if (entry->skb != NULL)
                  dev_kfree_skb_any(entry->skb);

            entry->first_frag_time = jiffies;
            entry->seq = seq;
            entry->last_frag = frag;
            entry->skb = skb;
            memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
            memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
      } else {
            /* received a fragment of a frame for which the head fragment
             * should have already been received */
            entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
                                      hdr->addr1);
            if (entry != NULL) {
                  entry->last_frag = frag;
                  skb = entry->skb;
            }
      }

      return skb;
}


/* Called only as a tasklet (software IRQ) */
static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
                                 struct ieee80211_hdr_4addr *hdr)
{
      u16 fc = le16_to_cpu(hdr->frame_ctl);
      u16 sc = le16_to_cpu(hdr->seq_ctl);
      unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
      struct ieee80211_frag_entry *entry;
      struct ieee80211_hdr_3addrqos *hdr_3addrqos;
      struct ieee80211_hdr_4addrqos *hdr_4addrqos;
      u8 tid;

      if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
        hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
        tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
        tid = UP2AC(tid);
        tid ++;
      } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
        hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
        tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
        tid = UP2AC(tid);
        tid ++;
      } else {
        tid = 0;
      }

      entry = ieee80211_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
                                hdr->addr1);

      if (entry == NULL) {
            IEEE80211_DEBUG_FRAG(
                  "could not invalidate fragment cache "
                  "entry (seq=%u)\n", seq);
            return -1;
      }

      entry->skb = NULL;
      return 0;
}



/* ieee80211_rx_frame_mgtmt
 *
 * Responsible for handling management control frames
 *
 * Called by ieee80211_rx */
static inline int
ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
                  struct ieee80211_rx_stats *rx_stats, u16 type,
                  u16 stype)
{
      /* On the struct stats definition there is written that
       * this is not mandatory.... but seems that the probe
       * response parser uses it
       */
        struct ieee80211_hdr_3addr * hdr = (struct ieee80211_hdr_3addr *)skb->data;

      rx_stats->len = skb->len;
      ieee80211_rx_mgt(ieee,(struct ieee80211_hdr_4addr *)skb->data,rx_stats);
        //if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN)))
        if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN)))//use ADDR1 to perform address matching for Management frames
        {
                dev_kfree_skb_any(skb);
                return 0;
        }

      ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);

      dev_kfree_skb_any(skb);

      return 0;

      #ifdef NOT_YET
      if (ieee->iw_mode == IW_MODE_MASTER) {
            printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
                   ieee->dev->name);
            return 0;
/*
  hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
  skb->data);*/
      }

      if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) {
            if (stype == WLAN_FC_STYPE_BEACON &&
                ieee->iw_mode == IW_MODE_MASTER) {
                  struct sk_buff *skb2;
                  /* Process beacon frames also in kernel driver to
                   * update STA(AP) table statistics */
                  skb2 = skb_clone(skb, GFP_ATOMIC);
                  if (skb2)
                        hostap_rx(skb2->dev, skb2, rx_stats);
            }

            /* send management frames to the user space daemon for
             * processing */
            ieee->apdevstats.rx_packets++;
            ieee->apdevstats.rx_bytes += skb->len;
            prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
            return 0;
      }

          if (ieee->iw_mode == IW_MODE_MASTER) {
            if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
                  printk(KERN_DEBUG "%s: unknown management frame "
                         "(type=0x%02x, stype=0x%02x) dropped\n",
                         skb->dev->name, type, stype);
                  return -1;
            }

            hostap_rx(skb->dev, skb, rx_stats);
            return 0;
      }

      printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
             "received in non-Host AP mode\n", skb->dev->name);
      return -1;
      #endif
}



/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
static unsigned char rfc1042_header[] =
{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
static unsigned char bridge_tunnel_header[] =
{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
/* No encapsulation header if EtherType < 0x600 (=length) */

/* Called by ieee80211_rx_frame_decrypt */
static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
                            struct sk_buff *skb, size_t hdrlen)
{
      struct net_device *dev = ieee->dev;
      u16 fc, ethertype;
      struct ieee80211_hdr_4addr *hdr;
      u8 *pos;

      if (skb->len < 24)
            return 0;

      hdr = (struct ieee80211_hdr_4addr *) skb->data;
      fc = le16_to_cpu(hdr->frame_ctl);

      /* check that the frame is unicast frame to us */
      if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
          IEEE80211_FCTL_TODS &&
          memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
          memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
            /* ToDS frame with own addr BSSID and DA */
      } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
               IEEE80211_FCTL_FROMDS &&
               memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
            /* FromDS frame with own addr as DA */
      } else
            return 0;

      if (skb->len < 24 + 8)
            return 0;

      /* check for port access entity Ethernet type */
//    pos = skb->data + 24;
      pos = skb->data + hdrlen;
      ethertype = (pos[6] << 8) | pos[7];
      if (ethertype == ETH_P_PAE)
            return 1;

      return 0;
}

/* Called only as a tasklet (software IRQ), by ieee80211_rx */
static inline int
ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
                     struct ieee80211_crypt_data *crypt)
{
      struct ieee80211_hdr_4addr *hdr;
      int res, hdrlen;

      if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
            return 0;
#if 1
      if (ieee->hwsec_active)
      {
            cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
            tcb_desc->bHwSec = 1;
      }
#endif
      hdr = (struct ieee80211_hdr_4addr *) skb->data;
      hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));

#ifdef CONFIG_IEEE80211_CRYPT_TKIP
      if (ieee->tkip_countermeasures &&
          strcmp(crypt->ops->name, "TKIP") == 0) {
            if (net_ratelimit()) {
                  printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
                         "received packet from " MAC_FMT "\n",
                         ieee->dev->name, MAC_ARG(hdr->addr2));
            }
            return -1;
      }
#endif

      atomic_inc(&crypt->refcnt);
      res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
      atomic_dec(&crypt->refcnt);
      if (res < 0) {
            IEEE80211_DEBUG_DROP(
                  "decryption failed (SA=" MAC_FMT
                  ") res=%d\n", MAC_ARG(hdr->addr2), res);
            if (res == -2)
                  IEEE80211_DEBUG_DROP("Decryption failed ICV "
                                   "mismatch (key %d)\n",
                                   skb->data[hdrlen + 3] >> 6);
            ieee->ieee_stats.rx_discards_undecryptable++;
            return -1;
      }

      return res;
}


/* Called only as a tasklet (software IRQ), by ieee80211_rx */
static inline int
ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
                       int keyidx, struct ieee80211_crypt_data *crypt)
{
      struct ieee80211_hdr_4addr *hdr;
      int res, hdrlen;

      if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
            return 0;
      if (ieee->hwsec_active)
      {
            cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
            tcb_desc->bHwSec = 1;
      }

      hdr = (struct ieee80211_hdr_4addr *) skb->data;
      hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));

      atomic_inc(&crypt->refcnt);
      res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
      atomic_dec(&crypt->refcnt);
      if (res < 0) {
            printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
                   " (SA=" MAC_FMT " keyidx=%d)\n",
                   ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
            return -1;
      }

      return 0;
}


/* this function is stolen from ipw2200 driver*/
#define IEEE_PACKET_RETRY_TIME (5*HZ)
static int is_duplicate_packet(struct ieee80211_device *ieee,
                              struct ieee80211_hdr_4addr *header)
{
      u16 fc = le16_to_cpu(header->frame_ctl);
      u16 sc = le16_to_cpu(header->seq_ctl);
      u16 seq = WLAN_GET_SEQ_SEQ(sc);
      u16 frag = WLAN_GET_SEQ_FRAG(sc);
      u16 *last_seq, *last_frag;
      unsigned long *last_time;
      struct ieee80211_hdr_3addrqos *hdr_3addrqos;
      struct ieee80211_hdr_4addrqos *hdr_4addrqos;
      u8 tid;


      //TO2DS and QoS
      if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
        hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header;
        tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
        tid = UP2AC(tid);
        tid ++;
      } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
        hdr_3addrqos = (struct ieee80211_hdr_3addrqos*)header;
        tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
        tid = UP2AC(tid);
        tid ++;
      } else { // no QoS
        tid = 0;
      }

      switch (ieee->iw_mode) {
      case IW_MODE_ADHOC:
      {
            struct list_head *p;
            struct ieee_ibss_seq *entry = NULL;
            u8 *mac = header->addr2;
            int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
            //for (pos = (head)->next; pos != (head); pos = pos->next)
            //__list_for_each(p, &ieee->ibss_mac_hash[index]) {
            list_for_each(p, &ieee->ibss_mac_hash[index]) {
                  entry = list_entry(p, struct ieee_ibss_seq, list);
                  if (!memcmp(entry->mac, mac, ETH_ALEN))
                        break;
            }
      //    if (memcmp(entry->mac, mac, ETH_ALEN)){
            if (p == &ieee->ibss_mac_hash[index]) {
                  entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
                  if (!entry) {
                        printk(KERN_WARNING "Cannot malloc new mac entry\n");
                        return 0;
                  }
                  memcpy(entry->mac, mac, ETH_ALEN);
                  entry->seq_num[tid] = seq;
                  entry->frag_num[tid] = frag;
                  entry->packet_time[tid] = jiffies;
                  list_add(&entry->list, &ieee->ibss_mac_hash[index]);
                  return 0;
            }
            last_seq = &entry->seq_num[tid];
            last_frag = &entry->frag_num[tid];
            last_time = &entry->packet_time[tid];
            break;
      }

      case IW_MODE_INFRA:
            last_seq = &ieee->last_rxseq_num[tid];
            last_frag = &ieee->last_rxfrag_num[tid];
            last_time = &ieee->last_packet_time[tid];

            break;
      default:
            return 0;
      }

//    if(tid != 0) {
//          printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
//    }
      if ((*last_seq == seq) &&
          time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
            if (*last_frag == frag){
                  //printk(KERN_WARNING "[1] go drop!\n");
                  goto drop;

            }
            if (*last_frag + 1 != frag)
                  /* out-of-order fragment */
                  //printk(KERN_WARNING "[2] go drop!\n");
                  goto drop;
      } else
            *last_seq = seq;

      *last_frag = frag;
      *last_time = jiffies;
      return 0;

drop:
//    BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
//    printk("DUP\n");

      return 1;
}
bool
AddReorderEntry(
      PRX_TS_RECORD                 pTS,
      PRX_REORDER_ENTRY       pReorderEntry
      )
{
      struct list_head *pList = &pTS->RxPendingPktList;
#if  1
      while(pList->next != &pTS->RxPendingPktList)
      {
            if( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
            {
                  pList = pList->next;
            }
            else if( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
            {
                  return false;
            }
            else
            {
                  break;
            }
      }
#endif
      pReorderEntry->List.next = pList->next;
      pReorderEntry->List.next->prev = &pReorderEntry->List;
      pReorderEntry->List.prev = pList;
      pList->next = &pReorderEntry->List;

      return true;
}

void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb** prxbIndicateArray,u8  index)
{
      u8 i = 0 , j=0;
      u16 ethertype;
//    if(index > 1)
//          IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__FUNCTION__,index);
      for(j = 0; j<index; j++)
      {
//added by amy for reorder
            struct ieee80211_rxb* prxb = prxbIndicateArray[j];
            for(i = 0; i<prxb->nr_subframes; i++) {
                  struct sk_buff *sub_skb = prxb->subframes[i];

            /* convert hdr + possible LLC headers into Ethernet header */
                  ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
                  if (sub_skb->len >= 8 &&
                        ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
                          ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
                         memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
                  /* remove RFC1042 or Bridge-Tunnel encapsulation and
                   * replace EtherType */
                        skb_pull(sub_skb, SNAP_SIZE);
                        memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
                        memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
                  } else {
                        u16 len;
                  /* Leave Ethernet header part of hdr and full payload */
                        len = htons(sub_skb->len);
                        memcpy(skb_push(sub_skb, 2), &len, 2);
                        memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
                        memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
                  }
                  //stats->rx_packets++;
                  //stats->rx_bytes += sub_skb->len;

            /* Indicat the packets to upper layer */
                  if (sub_skb) {
                        //printk("0skb_len(%d)\n", skb->len);
                        sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
                        memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
                        sub_skb->dev = ieee->dev;
                        sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
                        //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
                        ieee->last_rx_ps_time = jiffies;
                        //printk("1skb_len(%d)\n", skb->len);
                        netif_rx(sub_skb);
                  }
            }
            kfree(prxb);
            prxb = NULL;
      }
}


void RxReorderIndicatePacket( struct ieee80211_device *ieee,
            struct ieee80211_rxb* prxb,
            PRX_TS_RECORD           pTS,
            u16               SeqNum)
{
      PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
      PRX_REORDER_ENTRY       pReorderEntry = NULL;
      struct ieee80211_rxb* prxbIndicateArray[REORDER_WIN_SIZE];
      u8                WinSize = pHTInfo->RxReorderWinSize;
      u16               WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
      u8                index = 0;
      bool              bMatchWinStart = false, bPktInBuf = false;
      IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__FUNCTION__,SeqNum,pTS->RxIndicateSeq,WinSize);
#if 0
      if(!list_empty(&ieee->RxReorder_Unused_List))
            IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): ieee->RxReorder_Unused_List is nut NULL\n");
#endif
      /* Rx Reorder initialize condition.*/
      if(pTS->RxIndicateSeq == 0xffff) {
            pTS->RxIndicateSeq = SeqNum;
      }

      /* Drop out the packet which SeqNum is smaller than WinStart */
      if(SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
            IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
                         pTS->RxIndicateSeq, SeqNum);
            pHTInfo->RxReorderDropCounter++;
            {
                  int i;
                  for(i =0; i < prxb->nr_subframes; i++) {
                        dev_kfree_skb(prxb->subframes[i]);
                  }
                  kfree(prxb);
                  prxb = NULL;
            }
            return;
      }

      /*
       * Sliding window manipulation. Conditions includes:
       * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
       * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
       */
      if(SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
            pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
            bMatchWinStart = true;
      } else if(SN_LESS(WinEnd, SeqNum)) {
            if(SeqNum >= (WinSize - 1)) {
                  pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
            } else {
                  pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
            }
            IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
      }

      /*
       * Indication process.
       * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
       * with the SeqNum smaller than latest WinStart and buffer other packets.
       */
      /* For Rx Reorder condition:
       * 1. All packets with SeqNum smaller than WinStart => Indicate
       * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
       */
      if(bMatchWinStart) {
            /* Current packet is going to be indicated.*/
            IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
                        pTS->RxIndicateSeq, SeqNum);
            prxbIndicateArray[0] = prxb;
//          printk("========================>%s(): SeqNum is %d\n",__FUNCTION__,SeqNum);
            index = 1;
      } else {
            /* Current packet is going to be inserted into pending list.*/
            //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to orderd list\n",__FUNCTION__);
            if(!list_empty(&ieee->RxReorder_Unused_List)) {
                  pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List);
                  list_del_init(&pReorderEntry->List);

                  /* Make a reorder entry and insert into a the packet list.*/
                  pReorderEntry->SeqNum = SeqNum;
                  pReorderEntry->prxb = prxb;
      //          IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);

#if 1
                  if(!AddReorderEntry(pTS, pReorderEntry)) {
                        IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
                              __FUNCTION__, pTS->RxIndicateSeq, SeqNum);
                        list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
                        {
                              int i;
                              for(i =0; i < prxb->nr_subframes; i++) {
                                    dev_kfree_skb(prxb->subframes[i]);
                              }
                              kfree(prxb);
                              prxb = NULL;
                        }
                  } else {
                        IEEE80211_DEBUG(IEEE80211_DL_REORDER,
                               "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
                  }
#endif
            }
            else {
                  /*
                   * Packets are dropped if there is not enough reorder entries.
                   * This part shall be modified!! We can just indicate all the
                   * packets in buffer and get reorder entries.
                   */
                  IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
                  {
                        int i;
                        for(i =0; i < prxb->nr_subframes; i++) {
                              dev_kfree_skb(prxb->subframes[i]);
                        }
                        kfree(prxb);
                        prxb = NULL;
                  }
            }
      }

      /* Check if there is any packet need indicate.*/
      while(!list_empty(&pTS->RxPendingPktList)) {
            IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): start RREORDER indicate\n",__FUNCTION__);
#if 1
            pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List);
            if( SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
                        SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
            {
                  /* This protect buffer from overflow. */
                  if(index >= REORDER_WIN_SIZE) {
                        IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
                        bPktInBuf = true;
                        break;
                  }

                  list_del_init(&pReorderEntry->List);

                  if(SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
                        pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;

                  IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packets indication!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
                  prxbIndicateArray[index] = pReorderEntry->prxb;
            //    printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);
                  index++;

                  list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
            } else {
                  bPktInBuf = true;
                  break;
            }
#endif
      }

      /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
      if(index>0) {
            // Cancel previous pending timer.
            if(timer_pending(&pTS->RxPktPendingTimer))
            {
                  del_timer_sync(&pTS->RxPktPendingTimer);
            }
      //    del_timer_sync(&pTS->RxPktPendingTimer);
            pTS->RxTimeoutIndicateSeq = 0xffff;

            // Indicate packets
            if(index>REORDER_WIN_SIZE){
                  IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer buffer full!! \n");
                  return;
            }
            ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
            bPktInBuf = false;
      }

#if 1
      if(bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
            // Set new pending timer.
            IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): SET rx timeout timer\n", __FUNCTION__);
            pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
#if 0
            if(timer_pending(&pTS->RxPktPendingTimer))
                  del_timer_sync(&pTS->RxPktPendingTimer);
            pTS->RxPktPendingTimer.expires = jiffies + MSECS(pHTInfo->RxReorderPendingTime);
            add_timer(&pTS->RxPktPendingTimer);
#else
            mod_timer(&pTS->RxPktPendingTimer,  jiffies + MSECS(pHTInfo->RxReorderPendingTime));
#endif
      }
#endif
}

u8 parse_subframe(struct sk_buff *skb,
                  struct ieee80211_rx_stats *rx_stats,
              struct ieee80211_rxb *rxb,u8* src,u8* dst)
{
      struct ieee80211_hdr_3addr  *hdr = (struct ieee80211_hdr_3addr* )skb->data;
      u16         fc = le16_to_cpu(hdr->frame_ctl);

      u16         LLCOffset= sizeof(struct ieee80211_hdr_3addr);
      u16         ChkLength;
      bool        bIsAggregateFrame = false;
      u16         nSubframe_Length;
      u8          nPadding_Length = 0;
      u16         SeqNum=0;

      struct sk_buff *sub_skb;
      u8             *data_ptr;
      /* just for debug purpose */
      SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));

      if((IEEE80211_QOS_HAS_SEQ(fc))&&\
                  (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
            bIsAggregateFrame = true;
      }

      if(IEEE80211_QOS_HAS_SEQ(fc)) {
            LLCOffset += 2;
      }

      if(rx_stats->bContainHTC) {
            LLCOffset += sHTCLng;
      }
      //printk("ChkLength = %d\n", LLCOffset);
      // Null packet, don't indicate it to upper layer
      ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/

      if( skb->len <= ChkLength ) {
            return 0;
      }

      skb_pull(skb, LLCOffset);

      if(!bIsAggregateFrame) {
            rxb->nr_subframes = 1;
#ifdef JOHN_NOCPY
            rxb->subframes[0] = skb;
#else
            rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
#endif

            memcpy(rxb->src,src,ETH_ALEN);
            memcpy(rxb->dst,dst,ETH_ALEN);
            //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
            return 1;
      } else {
            rxb->nr_subframes = 0;
            memcpy(rxb->src,src,ETH_ALEN);
            memcpy(rxb->dst,dst,ETH_ALEN);
            while(skb->len > ETHERNET_HEADER_SIZE) {
                  /* Offset 12 denote 2 mac address */
                  nSubframe_Length = *((u16*)(skb->data + 12));
                  //==m==>change the length order
                  nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);

                  if(skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
#if 0//cosa
                        RT_ASSERT(
                                    (nRemain_Length>=(ETHERNET_HEADER_SIZE + nSubframe_Length)),
                                    ("ParseSubframe(): A-MSDU subframe parse error!! Subframe Length: %d\n", nSubframe_Length) );
#endif
                        printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
                                    __FUNCTION__,rxb->nr_subframes);
                        printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__FUNCTION__, nSubframe_Length);
                        printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
                        printk("The Packet SeqNum is %d\n",SeqNum);
                        return 0;
                  }

                  /* move the data point to data content */
                  skb_pull(skb, ETHERNET_HEADER_SIZE);

#ifdef JOHN_NOCPY
                  sub_skb = skb_clone(skb, GFP_ATOMIC);
                  sub_skb->len = nSubframe_Length;
                  sub_skb->tail = sub_skb->data + nSubframe_Length;
#else
                  /* Allocate new skb for releasing to upper layer */
                  sub_skb = dev_alloc_skb(nSubframe_Length + 12);
                  skb_reserve(sub_skb, 12);
                  data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
                  memcpy(data_ptr,skb->data,nSubframe_Length);
#endif
                  rxb->subframes[rxb->nr_subframes++] = sub_skb;
                  if(rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
                        IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
                        break;
                  }
                  skb_pull(skb,nSubframe_Length);

                  if(skb->len != 0) {
                        nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
                        if(nPadding_Length == 4) {
                              nPadding_Length = 0;
                        }

                        if(skb->len < nPadding_Length) {
                              return 0;
                        }

                        skb_pull(skb,nPadding_Length);
                  }
            }
#ifdef JOHN_NOCPY
            dev_kfree_skb(skb);
#endif
            //{just for debug added by david
            //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
            //}
            return rxb->nr_subframes;
      }
}

/* All received frames are sent to this function. @skb contains the frame in
 * IEEE 802.11 format, i.e., in the format it was sent over air.
 * This function is called only as a tasklet (software IRQ). */
int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
             struct ieee80211_rx_stats *rx_stats)
{
      struct net_device *dev = ieee->dev;
      struct ieee80211_hdr_4addr *hdr;
      //struct ieee80211_hdr_3addrqos *hdr;

      size_t hdrlen;
      u16 fc, type, stype, sc;
      struct net_device_stats *stats;
      unsigned int frag;
      u8 *payload;
      u16 ethertype;
      //added by amy for reorder
      u8    TID = 0;
      u16   SeqNum = 0;
      PRX_TS_RECORD pTS = NULL;
      //bool bIsAggregateFrame = false;
      //added by amy for reorder
#ifdef NOT_YET
      struct net_device *wds = NULL;
      struct sk_buff *skb2 = NULL;
      struct net_device *wds = NULL;
      int frame_authorized = 0;
      int from_assoc_ap = 0;
      void *sta = NULL;
#endif
//    u16 qos_ctl = 0;
      u8 dst[ETH_ALEN];
      u8 src[ETH_ALEN];
      u8 bssid[ETH_ALEN];
      struct ieee80211_crypt_data *crypt = NULL;
      int keyidx = 0;

      int i;
      struct ieee80211_rxb* rxb = NULL;
      // cheat the the hdr type
      hdr = (struct ieee80211_hdr_4addr *)skb->data;
      stats = &ieee->stats;

      if (skb->len < 10) {
            printk(KERN_INFO "%s: SKB length < 10\n",
                   dev->name);
            goto rx_dropped;
      }

      fc = le16_to_cpu(hdr->frame_ctl);
      type = WLAN_FC_GET_TYPE(fc);
      stype = WLAN_FC_GET_STYPE(fc);
      sc = le16_to_cpu(hdr->seq_ctl);

      frag = WLAN_GET_SEQ_FRAG(sc);
      hdrlen = ieee80211_get_hdrlen(fc);

      if(HTCCheck(ieee, skb->data))
      {
            if(net_ratelimit())
            printk("find HTCControl\n");
            hdrlen += 4;
            rx_stats->bContainHTC = 1;
      }

      //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
#ifdef NOT_YET
#if WIRELESS_EXT > 15
      /* Put this code here so that we avoid duplicating it in all
       * Rx paths. - Jean II */
#ifdef IW_WIRELESS_SPY        /* defined in iw_handler.h */
      /* If spy monitoring on */
      if (iface->spy_data.spy_number > 0) {
            struct iw_quality wstats;
            wstats.level = rx_stats->rssi;
            wstats.noise = rx_stats->noise;
            wstats.updated = 6;     /* No qual value */
            /* Update spy records */
            wireless_spy_update(dev, hdr->addr2, &wstats);
      }
#endif /* IW_WIRELESS_SPY */
#endif /* WIRELESS_EXT > 15 */
      hostap_update_rx_stats(local->ap, hdr, rx_stats);
#endif

#if WIRELESS_EXT > 15
      if (ieee->iw_mode == IW_MODE_MONITOR) {
            ieee80211_monitor_rx(ieee, skb, rx_stats);
            stats->rx_packets++;
            stats->rx_bytes += skb->len;
            return 1;
      }
#endif
      if (ieee->host_decrypt) {
            int idx = 0;
            if (skb->len >= hdrlen + 3)
                  idx = skb->data[hdrlen + 3] >> 6;
            crypt = ieee->crypt[idx];
#ifdef NOT_YET
            sta = NULL;

            /* Use station specific key to override default keys if the
             * receiver address is a unicast address ("individual RA"). If
             * bcrx_sta_key parameter is set, station specific key is used
             * even with broad/multicast targets (this is against IEEE
             * 802.11, but makes it easier to use different keys with
             * stations that do not support WEP key mapping). */

            if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
                  (void) hostap_handle_sta_crypto(local, hdr, &crypt,
                                          &sta);
#endif

            /* allow NULL decrypt to indicate an station specific override
             * for default encryption */
            if (crypt && (crypt->ops == NULL ||
                        crypt->ops->decrypt_mpdu == NULL))
                  crypt = NULL;

            if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
                  /* This seems to be triggered by some (multicast?)
                   * frames from other than current BSS, so just drop the
                   * frames silently instead of filling system log with
                   * these reports. */
                  IEEE80211_DEBUG_DROP("Decryption failed (not set)"
                                   " (SA=" MAC_FMT ")\n",
                                   MAC_ARG(hdr->addr2));
                  ieee->ieee_stats.rx_discards_undecryptable++;
                  goto rx_dropped;
            }
      }

      if (skb->len < IEEE80211_DATA_HDR3_LEN)
            goto rx_dropped;

      // if QoS enabled, should check the sequence for each of the AC
      if( (ieee->pHTInfo->bCurRxReorderEnable == false) || !ieee->current_network.qos_data.active|| !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)){
            if (is_duplicate_packet(ieee, hdr))
            goto rx_dropped;

      }
      else
      {
            PRX_TS_RECORD pRxTS = NULL;
      #if 0
            struct ieee80211_hdr_3addr *hdr;
            u16 fc;
            hdr = (struct ieee80211_hdr_3addr *)skb->data;
            fc = le16_to_cpu(hdr->frame_ctl);
            u8 tmp = (fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS);

            u8 tid = (*((u8*)skb->data + (((fc& IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))?30:24)))&0xf;
            printk("====================>fc:%x, tid:%d, tmp:%d\n", fc, tid, tmp);
            //u8 tid =  (u8)((frameqos*)(buf + ((fc & IEEE80211_FCTL_TODS)&&(fc & IEEE80211_FCTL_FROMDS))? 30 : 24))->field.tid;
      #endif
                  //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__FUNCTION__, tid);
#if 1
            if(GetTs(
                        ieee,
                        (PTS_COMMON_INFO*) &pRxTS,
                        hdr->addr2,
                        (u8)Frame_QoSTID((u8*)(skb->data)),
                        RX_DIR,
                        true))
            {

            //    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));
                  if(   (fc & (1<<11))  &&
                              (frag == pRxTS->RxLastFragNum) &&
                              (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)   )
                  {
                        goto rx_dropped;
                  }
                  else
                  {
                        pRxTS->RxLastFragNum = frag;
                        pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
                  }
            }
            else
            {
                  IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n",__FUNCTION__);
                  goto rx_dropped;
            }
      }
#endif
      if (type == IEEE80211_FTYPE_MGMT) {

      #if 0
            if ( stype == IEEE80211_STYPE_AUTH &&
                fc & IEEE80211_FCTL_WEP && ieee->host_decrypt &&
                (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0)
            {
                  printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
                         "from " MAC_FMT "\n", dev->name,
                         MAC_ARG(hdr->addr2));
                  /* TODO: could inform hostapd about this so that it
                   * could send auth failure report */
                  goto rx_dropped;
            }
      #endif

      //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
            if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
                  goto rx_dropped;
            else
                  goto rx_exit;
      }

      /* Data frame - extract src/dst addresses */
      switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
      case IEEE80211_FCTL_FROMDS:
            memcpy(dst, hdr->addr1, ETH_ALEN);
            memcpy(src, hdr->addr3, ETH_ALEN);
            memcpy(bssid, hdr->addr2, ETH_ALEN);
            break;
      case IEEE80211_FCTL_TODS:
            memcpy(dst, hdr->addr3, ETH_ALEN);
            memcpy(src, hdr->addr2, ETH_ALEN);
            memcpy(bssid, hdr->addr1, ETH_ALEN);
            break;
      case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
            if (skb->len < IEEE80211_DATA_HDR4_LEN)
                  goto rx_dropped;
            memcpy(dst, hdr->addr3, ETH_ALEN);
            memcpy(src, hdr->addr4, ETH_ALEN);
            memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
            break;
      case 0:
            memcpy(dst, hdr->addr1, ETH_ALEN);
            memcpy(src, hdr->addr2, ETH_ALEN);
            memcpy(bssid, hdr->addr3, ETH_ALEN);
            break;
      }

#ifdef NOT_YET
      if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
            goto rx_dropped;
      if (wds) {
            skb->dev = dev = wds;
            stats = hostap_get_stats(dev);
      }

      if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
          (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
          ieee->stadev &&
          memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
            /* Frame from BSSID of the AP for which we are a client */
            skb->dev = dev = ieee->stadev;
            stats = hostap_get_stats(dev);
            from_assoc_ap = 1;
      }
#endif

      dev->last_rx = jiffies;

#ifdef NOT_YET
      if ((ieee->iw_mode == IW_MODE_MASTER ||
           ieee->iw_mode == IW_MODE_REPEAT) &&
          !from_assoc_ap) {
            switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
                                   wds != NULL)) {
            case AP_RX_CONTINUE_NOT_AUTHORIZED:
                  frame_authorized = 0;
                  break;
            case AP_RX_CONTINUE:
                  frame_authorized = 1;
                  break;
            case AP_RX_DROP:
                  goto rx_dropped;
            case AP_RX_EXIT:
                  goto rx_exit;
            }
      }
#endif
      //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
      /* Nullfunc frames may have PS-bit set, so they must be passed to
       * hostap_handle_sta_rx() before being dropped here. */
      if (stype != IEEE80211_STYPE_DATA &&
          stype != IEEE80211_STYPE_DATA_CFACK &&
          stype != IEEE80211_STYPE_DATA_CFPOLL &&
          stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
          stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
          ) {
            if (stype != IEEE80211_STYPE_NULLFUNC)
                  IEEE80211_DEBUG_DROP(
                        "RX: dropped data frame "
                        "with no data (type=0x%02x, "
                        "subtype=0x%02x, len=%d)\n",
                        type, stype, skb->len);
            goto rx_dropped;
      }
        if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
                goto rx_dropped;

      /* skb: hdr + (possibly fragmented, possibly encrypted) payload */

      if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
          (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
      {
            printk("decrypt frame error\n");
            goto rx_dropped;
      }


      hdr = (struct ieee80211_hdr_4addr *) skb->data;

      /* skb: hdr + (possibly fragmented) plaintext payload */
      // PR: FIXME: hostap has additional conditions in the "if" below:
      // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
      if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
            int flen;
            struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
            IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);

            if (!frag_skb) {
                  IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
                              "Rx cannot get skb from fragment "
                              "cache (morefrag=%d seq=%u frag=%u)\n",
                              (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
                              WLAN_GET_SEQ_SEQ(sc), frag);
                  goto rx_dropped;
            }
            flen = skb->len;
            if (frag != 0)
                  flen -= hdrlen;

            if (frag_skb->tail + flen > frag_skb->end) {
                  printk(KERN_WARNING "%s: host decrypted and "
                         "reassembled frame did not fit skb\n",
                         dev->name);
                  ieee80211_frag_cache_invalidate(ieee, hdr);
                  goto rx_dropped;
            }

            if (frag == 0) {
                  /* copy first fragment (including full headers) into
                   * beginning of the fragment cache skb */
                  memcpy(skb_put(frag_skb, flen), skb->data, flen);
            } else {
                  /* append frame payload to the end of the fragment
                   * cache skb */
                  memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
                         flen);
            }
            dev_kfree_skb_any(skb);
            skb = NULL;

            if (fc & IEEE80211_FCTL_MOREFRAGS) {
                  /* more fragments expected - leave the skb in fragment
                   * cache for now; it will be delivered to upper layers
                   * after all fragments have been received */
                  goto rx_exit;
            }

            /* this was the last fragment and the frame will be
             * delivered, so remove skb from fragment cache */
            skb = frag_skb;
            hdr = (struct ieee80211_hdr_4addr *) skb->data;
            ieee80211_frag_cache_invalidate(ieee, hdr);
      }

      /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
       * encrypted/authenticated */
      if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
          ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
      {
            printk("==>decrypt msdu error\n");
            goto rx_dropped;
      }

      //added by amy for AP roaming
      ieee->LinkDetectInfo.NumRecvDataInPeriod++;
      ieee->LinkDetectInfo.NumRxOkInPeriod++;

      hdr = (struct ieee80211_hdr_4addr *) skb->data;
      if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
            if (/*ieee->ieee802_1x &&*/
                ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {

#ifdef CONFIG_IEEE80211_DEBUG
                  /* pass unencrypted EAPOL frames even if encryption is
                   * configured */
                  struct eapol *eap = (struct eapol *)(skb->data +
                        24);
                  IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
                                    eap_get_type(eap->type));
#endif
            } else {
                  IEEE80211_DEBUG_DROP(
                        "encryption configured, but RX "
                        "frame not encrypted (SA=" MAC_FMT ")\n",
                        MAC_ARG(hdr->addr2));
                  goto rx_dropped;
            }
      }

#ifdef CONFIG_IEEE80211_DEBUG
      if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
          ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
                  struct eapol *eap = (struct eapol *)(skb->data +
                        24);
                  IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
                                    eap_get_type(eap->type));
      }
#endif

      if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
          !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
            IEEE80211_DEBUG_DROP(
                  "dropped unencrypted RX data "
                  "frame from " MAC_FMT
                  " (drop_unencrypted=1)\n",
                  MAC_ARG(hdr->addr2));
            goto rx_dropped;
      }
/*
      if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
            printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
      }
*/
//added by amy for reorder
#if 1
      if(ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
            && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1))
      {
            TID = Frame_QoSTID(skb->data);
            SeqNum = WLAN_GET_SEQ_SEQ(sc);
            GetTs(ieee,(PTS_COMMON_INFO*) &pTS,hdr->addr2,TID,RX_DIR,true);
            if(TID !=0 && TID !=3)
            {
                  ieee->bis_any_nonbepkts = true;
            }
      }
#endif
//added by amy for reorder
      /* skb: hdr + (possible reassembled) full plaintext payload */
      payload = skb->data + hdrlen;
      //ethertype = (payload[6] << 8) | payload[7];
      rxb = (struct ieee80211_rxb*)kmalloc(sizeof(struct ieee80211_rxb),GFP_ATOMIC);
      if(rxb == NULL)
      {
            IEEE80211_DEBUG(IEEE80211_DL_ERR,"%s(): kmalloc rxb error\n",__FUNCTION__);
            goto rx_dropped;
      }
      /* to parse amsdu packets */
      /* qos data packets & reserved bit is 1 */
      if(parse_subframe(skb,rx_stats,rxb,src,dst) == 0) {
            /* only to free rxb, and not submit the packets to upper layer */
            for(i =0; i < rxb->nr_subframes; i++) {
                  dev_kfree_skb(rxb->subframes[i]);
            }
            kfree(rxb);
            rxb = NULL;
            goto rx_dropped;
      }

      ieee->last_rx_ps_time = jiffies;
//added by amy for reorder
      if(ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL){
//added by amy for reorder
            for(i = 0; i<rxb->nr_subframes; i++) {
                  struct sk_buff *sub_skb = rxb->subframes[i];

                  if (sub_skb) {
                        /* convert hdr + possible LLC headers into Ethernet header */
                        ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
                        if (sub_skb->len >= 8 &&
                                    ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
                                      ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
                                     memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
                              /* remove RFC1042 or Bridge-Tunnel encapsulation and
                               * replace EtherType */
                              skb_pull(sub_skb, SNAP_SIZE);
                              memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
                              memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
                        } else {
                              u16 len;
                              /* Leave Ethernet header part of hdr and full payload */
                              len = htons(sub_skb->len);
                              memcpy(skb_push(sub_skb, 2), &len, 2);
                              memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
                              memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
                        }

                        stats->rx_packets++;
                        stats->rx_bytes += sub_skb->len;
                        if(is_multicast_ether_addr(dst)) {
                              stats->multicast++;
                        }

                        /* Indicat the packets to upper layer */
                        //printk("0skb_len(%d)\n", skb->len);
                        sub_skb->protocol = eth_type_trans(sub_skb, dev);
                        memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
                        sub_skb->dev = dev;
                        sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
                        //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
                        //printk("1skb_len(%d)\n", skb->len);
                        netif_rx(sub_skb);
                  }
            }
            kfree(rxb);
            rxb = NULL;

      }
      else
      {
            IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__FUNCTION__);
            RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
      }
#ifndef JOHN_NOCPY
      dev_kfree_skb(skb);
#endif

 rx_exit:
#ifdef NOT_YET
      if (sta)
            hostap_handle_sta_release(sta);
#endif
      return 1;

 rx_dropped:
      if (rxb != NULL)
      {
            kfree(rxb);
            rxb = NULL;
      }
      stats->rx_dropped++;

      /* Returning 0 indicates to caller that we have not handled the SKB--
       * so it is still allocated and can be used again by underlying
       * hardware as a DMA target */
      return 0;
}

#define MGMT_FRAME_FIXED_PART_LENGTH            0x24

static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };

/*
* Make ther structure we read from the beacon packet has
* the right values
*/
static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
                                     *info_element, int sub_type)
{

        if (info_element->qui_subtype != sub_type)
                return -1;
        if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
                return -1;
        if (info_element->qui_type != QOS_OUI_TYPE)
                return -1;
        if (info_element->version != QOS_VERSION_1)
                return -1;

        return 0;
}


/*
 * Parse a QoS parameter element
 */
static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
                                            *element_param, struct ieee80211_info_element
                                            *info_element)
{
        int ret = 0;
        u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;

        if ((info_element == NULL) || (element_param == NULL))
                return -1;

        if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
                memcpy(element_param->info_element.qui, info_element->data,
                       info_element->len);
                element_param->info_element.elementID = info_element->id;
                element_param->info_element.length = info_element->len;
        } else
                ret = -1;
        if (ret == 0)
                ret = ieee80211_verify_qos_info(&element_param->info_element,
                                                QOS_OUI_PARAM_SUB_TYPE);
        return ret;
}

/*
 * Parse a QoS information element
 */
static int ieee80211_read_qos_info_element(struct
                                           ieee80211_qos_information_element
                                           *element_info, struct ieee80211_info_element
                                           *info_element)
{
        int ret = 0;
        u16 size = sizeof(struct ieee80211_qos_information_element) - 2;

        if (element_info == NULL)
                return -1;
        if (info_element == NULL)
                return -1;

        if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
                memcpy(element_info->qui, info_element->data,
                       info_element->len);
                element_info->elementID = info_element->id;
                element_info->length = info_element->len;
        } else
                ret = -1;

        if (ret == 0)
                ret = ieee80211_verify_qos_info(element_info,
                                                QOS_OUI_INFO_SUB_TYPE);
        return ret;
}


/*
 * Write QoS parameters from the ac parameters.
 */
static int ieee80211_qos_convert_ac_to_parameters(struct
                                                  ieee80211_qos_parameter_info
                                                  *param_elm, struct
                                                  ieee80211_qos_parameters
                                                  *qos_param)
{
        int rc = 0;
        int i;
        struct ieee80211_qos_ac_parameter *ac_params;
      u8 aci;
        //u8 cw_min;
        //u8 cw_max;

        for (i = 0; i < QOS_QUEUE_NUM; i++) {
                ac_params = &(param_elm->ac_params_record[i]);

            aci = (ac_params->aci_aifsn & 0x60) >> 5;

            if(aci >= QOS_QUEUE_NUM)
                  continue;
                qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;

            /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
                qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];

                qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;

                qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;

                qos_param->flag[aci] =
                    (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
                qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
        }
        return rc;
}

/*
 * we have a generic data element which it may contain QoS information or
 * parameters element. check the information element length to decide
 * which type to read
 */
static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
                                             *info_element,
                                             struct ieee80211_network *network)
{
        int rc = 0;
        struct ieee80211_qos_parameters *qos_param = NULL;
        struct ieee80211_qos_information_element qos_info_element;

        rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);

        if (rc == 0) {
                network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
                network->flags |= NETWORK_HAS_QOS_INFORMATION;
        } else {
                struct ieee80211_qos_parameter_info param_element;

                rc = ieee80211_read_qos_param_element(&param_element,
                                                      info_element);
                if (rc == 0) {
                        qos_param = &(network->qos_data.parameters);
                        ieee80211_qos_convert_ac_to_parameters(&param_element,
                                                               qos_param);
                        network->flags |= NETWORK_HAS_QOS_PARAMETERS;
                        network->qos_data.param_count =
                            param_element.info_element.ac_info & 0x0F;
                }
        }

        if (rc == 0) {
                IEEE80211_DEBUG_QOS("QoS is supported\n");
                network->qos_data.supported = 1;
        }
        return rc;
}

#ifdef CONFIG_IEEE80211_DEBUG
#define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x

static const char *get_info_element_string(u16 id)
{
        switch (id) {
                MFIE_STRING(SSID);
                MFIE_STRING(RATES);
                MFIE_STRING(FH_SET);
                MFIE_STRING(DS_SET);
                MFIE_STRING(CF_SET);
                MFIE_STRING(TIM);
                MFIE_STRING(IBSS_SET);
                MFIE_STRING(COUNTRY);
                MFIE_STRING(HOP_PARAMS);
                MFIE_STRING(HOP_TABLE);
                MFIE_STRING(REQUEST);
                MFIE_STRING(CHALLENGE);
                MFIE_STRING(POWER_CONSTRAINT);
                MFIE_STRING(POWER_CAPABILITY);
                MFIE_STRING(TPC_REQUEST);
                MFIE_STRING(TPC_REPORT);
                MFIE_STRING(SUPP_CHANNELS);
                MFIE_STRING(CSA);
                MFIE_STRING(MEASURE_REQUEST);
                MFIE_STRING(MEASURE_REPORT);
                MFIE_STRING(QUIET);
                MFIE_STRING(IBSS_DFS);
               // MFIE_STRING(ERP_INFO);
                MFIE_STRING(RSN);
                MFIE_STRING(RATES_EX);
                MFIE_STRING(GENERIC);
                MFIE_STRING(QOS_PARAMETER);
        default:
                return "UNKNOWN";
        }
}
#endif

#ifdef ENABLE_DOT11D
static inline void ieee80211_extract_country_ie(
      struct ieee80211_device *ieee,
      struct ieee80211_info_element *info_element,
      struct ieee80211_network *network,
      u8 * addr2
)
{
      if(IS_DOT11D_ENABLE(ieee))
      {
            if(info_element->len!= 0)
            {
                  memcpy(network->CountryIeBuf, info_element->data, info_element->len);
                  network->CountryIeLen = info_element->len;

                  if(!IS_COUNTRY_IE_VALID(ieee))
                  {
                        Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
                  }
            }

            //
            // 070305, rcnjko: I update country IE watch dog here because
            // some AP (e.g. Cisco 1242) don't include country IE in their
            // probe response frame.
            //
            if(IS_EQUAL_CIE_SRC(ieee, addr2) )
            {
                  UPDATE_CIE_WATCHDOG(ieee);
            }
      }

}
#endif

int ieee80211_parse_info_param(struct ieee80211_device *ieee,
            struct ieee80211_info_element *info_element,
            u16 length,
            struct ieee80211_network *network,
            struct ieee80211_rx_stats *stats)
{
      u8 i;
      short offset;
        u16 tmp_htcap_len=0;
      u16   tmp_htinfo_len=0;
      u16 ht_realtek_agg_len=0;
      u8  ht_realtek_agg_buf[MAX_IE_LEN];
//    u16 broadcom_len = 0;
#ifdef CONFIG_IEEE80211_DEBUG
      char rates_str[64];
      char *p;
#endif

      while (length >= sizeof(*info_element)) {
            if (sizeof(*info_element) + info_element->len > length) {
                  IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
                                   "info_element->len + 2 > left : "
                                   "info_element->len+2=%zd left=%d, id=%d.\n",
                                   info_element->len +
                                   sizeof(*info_element),
                                   length, info_element->id);
                  /* We stop processing but don't return an error here
                   * because some misbehaviour APs break this rule. ie.
                   * Orinoco AP1000. */
                  break;
            }

            switch (info_element->id) {
            case MFIE_TYPE_SSID:
                  if (ieee80211_is_empty_essid(info_element->data,
                                         info_element->len)) {
                        network->flags |= NETWORK_EMPTY_ESSID;
                        break;
                  }

                  network->ssid_len = min(info_element->len,
                                    (u8) IW_ESSID_MAX_SIZE);
                  memcpy(network->ssid, info_element->data, network->ssid_len);
                  if (network->ssid_len < IW_ESSID_MAX_SIZE)
                        memset(network->ssid + network->ssid_len, 0,
                               IW_ESSID_MAX_SIZE - network->ssid_len);

                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
                                   network->ssid, network->ssid_len);
                  break;

            case MFIE_TYPE_RATES:
#ifdef CONFIG_IEEE80211_DEBUG
                  p = rates_str;
#endif
                  network->rates_len = min(info_element->len,
                                     MAX_RATES_LENGTH);
                  for (i = 0; i < network->rates_len; i++) {
                        network->rates[i] = info_element->data[i];
#ifdef CONFIG_IEEE80211_DEBUG
                        p += snprintf(p, sizeof(rates_str) -
                                    (p - rates_str), "%02X ",
                                    network->rates[i]);
#endif
                        if (ieee80211_is_ofdm_rate
                            (info_element->data[i])) {
                              network->flags |= NETWORK_HAS_OFDM;
                              if (info_element->data[i] &
                                  IEEE80211_BASIC_RATE_MASK)
                                    network->flags &=
                                        ~NETWORK_HAS_CCK;
                        }
                  }

                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
                                   rates_str, network->rates_len);
                  break;

            case MFIE_TYPE_RATES_EX:
#ifdef CONFIG_IEEE80211_DEBUG
                  p = rates_str;
#endif
                  network->rates_ex_len = min(info_element->len,
                                        MAX_RATES_EX_LENGTH);
                  for (i = 0; i < network->rates_ex_len; i++) {
                        network->rates_ex[i] = info_element->data[i];
#ifdef CONFIG_IEEE80211_DEBUG
                        p += snprintf(p, sizeof(rates_str) -
                                    (p - rates_str), "%02X ",
                                    network->rates[i]);
#endif
                        if (ieee80211_is_ofdm_rate
                            (info_element->data[i])) {
                              network->flags |= NETWORK_HAS_OFDM;
                              if (info_element->data[i] &
                                  IEEE80211_BASIC_RATE_MASK)
                                    network->flags &=
                                        ~NETWORK_HAS_CCK;
                        }
                  }

                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
                                   rates_str, network->rates_ex_len);
                  break;

            case MFIE_TYPE_DS_SET:
                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
                                   info_element->data[0]);
                  network->channel = info_element->data[0];
                  break;

            case MFIE_TYPE_FH_SET:
                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
                  break;

            case MFIE_TYPE_CF_SET:
                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
                  break;

            case MFIE_TYPE_TIM:
                  if(info_element->len < 4)
                        break;

                  network->tim.tim_count = info_element->data[0];
                  network->tim.tim_period = info_element->data[1];

                        network->dtim_period = info_element->data[1];
                        if(ieee->state != IEEE80211_LINKED)
                                break;
#if 0
                        network->last_dtim_sta_time[0] = stats->mac_time[0];
#else
                  //we use jiffies for legacy Power save
                  network->last_dtim_sta_time[0] = jiffies;
#endif
                        network->last_dtim_sta_time[1] = stats->mac_time[1];

                        network->dtim_data = IEEE80211_DTIM_VALID;

                        if(info_element->data[0] != 0)
                                break;

                        if(info_element->data[2] & 1)
                                network->dtim_data |= IEEE80211_DTIM_MBCAST;

                        offset = (info_element->data[2] >> 1)*2;

                        //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);

                        if(ieee->assoc_id < 8*offset ||
                                ieee->assoc_id > 8*(offset + info_element->len -3))

                                break;

                        offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;

                        if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
                                network->dtim_data |= IEEE80211_DTIM_UCAST;

                  //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
                  break;

            case MFIE_TYPE_ERP:
                  network->erp_value = info_element->data[0];
                  network->flags |= NETWORK_HAS_ERP_VALUE;
                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
                                   network->erp_value);
                  break;
            case MFIE_TYPE_IBSS_SET:
                  network->atim_window = info_element->data[0];
                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
                                   network->atim_window);
                  break;

            case MFIE_TYPE_CHALLENGE:
                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
                  break;

            case MFIE_TYPE_GENERIC:
                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
                                   info_element->len);
                  if (!ieee80211_parse_qos_info_param_IE(info_element,
                                                 network))
                        break;

                  if (info_element->len >= 4 &&
                      info_element->data[0] == 0x00 &&
                      info_element->data[1] == 0x50 &&
                      info_element->data[2] == 0xf2 &&
                      info_element->data[3] == 0x01) {
                        network->wpa_ie_len = min(info_element->len + 2,
                                            MAX_WPA_IE_LEN);
                        memcpy(network->wpa_ie, info_element,
                               network->wpa_ie_len);
                        break;
                  }

#ifdef THOMAS_TURBO
                        if (info_element->len == 7 &&
                            info_element->data[0] == 0x00 &&
                            info_element->data[1] == 0xe0 &&
                            info_element->data[2] == 0x4c &&
                            info_element->data[3] == 0x01 &&
                            info_element->data[4] == 0x02) {
                                network->Turbo_Enable = 1;
                        }
#endif

                        //for HTcap and HTinfo parameters
                  if(tmp_htcap_len == 0){
                        if(info_element->len >= 4 &&
                           info_element->data[0] == 0x00 &&
                           info_element->data[1] == 0x90 &&
                           info_element->data[2] == 0x4c &&
                           info_element->data[3] == 0x033){

                                    tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
                                    if(tmp_htcap_len != 0){
                                          network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
                                          network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
                                                sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
                                          memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
                                    }
                        }
                        if(tmp_htcap_len != 0){
                              network->bssht.bdSupportHT = true;
                              network->bssht.bdHT1R = ((((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
                        }else{
                              network->bssht.bdSupportHT = false;
                              network->bssht.bdHT1R = false;
                        }
                  }


                  if(tmp_htinfo_len == 0){
                        if(info_element->len >= 4 &&
                              info_element->data[0] == 0x00 &&
                              info_element->data[1] == 0x90 &&
                              info_element->data[2] == 0x4c &&
                              info_element->data[3] == 0x034){

                                    tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
                                    if(tmp_htinfo_len != 0){
                                          network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
                                          if(tmp_htinfo_len){
                                                network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
                                                      sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
                                                memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
                                          }

                                    }

                        }
                  }

                  if(ieee->aggregation){
                        if(network->bssht.bdSupportHT){
                              if(info_element->len >= 4 &&
                                    info_element->data[0] == 0x00 &&
                                    info_element->data[1] == 0xe0 &&
                                    info_element->data[2] == 0x4c &&
                                    info_element->data[3] == 0x02){

                                    ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
                                    memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);

                              }
                              if(ht_realtek_agg_len >= 5){
                                    network->realtek_cap_exit = true;
                                    network->bssht.bdRT2RTAggregation = true;

                                    if((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
                                    network->bssht.bdRT2RTLongSlotTime = true;

                                    if((ht_realtek_agg_buf[4]==1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
                                    {
                                          network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
                                          //bssDesc->Vender = HT_IOT_PEER_REALTEK_92SE;
                                    }
                              }
                        }

                  }

                  //if(tmp_htcap_len !=0  ||  tmp_htinfo_len != 0)
                  {
                        if((info_element->len >= 3 &&
                               info_element->data[0] == 0x00 &&
                               info_element->data[1] == 0x05 &&
                               info_element->data[2] == 0xb5) ||
                               (info_element->len >= 3 &&
                               info_element->data[0] == 0x00 &&
                               info_element->data[1] == 0x0a &&
                               info_element->data[2] == 0xf7) ||
                               (info_element->len >= 3 &&
                               info_element->data[0] == 0x00 &&
                               info_element->data[1] == 0x10 &&
                               info_element->data[2] == 0x18)){

                                    network->broadcom_cap_exist = true;

                        }
                  }
#if 0
                  if (tmp_htcap_len !=0)
                        {
                              u16 cap_ext = ((PHT_CAPABILITY_ELE)&info_element->data[0])->ExtHTCapInfo;
                              if ((cap_ext & 0x0c00) == 0x0c00)
                                    {
                                          network->ralink_cap_exist = true;
                                    }
                        }
#endif
                  if(info_element->len >= 3 &&
                        info_element->data[0] == 0x00 &&
                        info_element->data[1] == 0x0c &&
                        info_element->data[2] == 0x43)
                  {
                        network->ralink_cap_exist = true;
                  }
                  else
                        network->ralink_cap_exist = false;
                  //added by amy for atheros AP
                  if((info_element->len >= 3 &&
                        info_element->data[0] == 0x00 &&
                        info_element->data[1] == 0x03 &&
                        info_element->data[2] == 0x7f) ||
                        (info_element->len >= 3 &&
                        info_element->data[0] == 0x00 &&
                        info_element->data[1] == 0x13 &&
                        info_element->data[2] == 0x74))
                  {
                  //    printk("========>%s(): athros AP is exist\n",__FUNCTION__);
                        network->atheros_cap_exist = true;
                  }
                  else
                        network->atheros_cap_exist = false;

                  if ((info_element->len >= 3 &&
                        info_element->data[0] == 0x00 &&
                        info_element->data[1] == 0x50 &&
                        info_element->data[2] == 0x43) )
                        {
                              network->marvell_cap_exist = true;
                        }
                  else
                        network->marvell_cap_exist = false;

                  if(info_element->len >= 3 &&
                        info_element->data[0] == 0x00 &&
                        info_element->data[1] == 0x40 &&
                        info_element->data[2] == 0x96)
                  {
                        network->cisco_cap_exist = true;
                  }
                  else
                        network->cisco_cap_exist = false;
                  //added by amy for LEAP of cisco
                  if(info_element->len > 4 &&
                        info_element->data[0] == 0x00 &&
                        info_element->data[1] == 0x40 &&
                        info_element->data[2] == 0x96 &&
                        info_element->data[3] == 0x01)
                  {
                        if(info_element->len == 6)
                        {
                              memcpy(network->CcxRmState, &info_element[4], 2);
                              if(network->CcxRmState[0] != 0)
                              {
                                    network->bCcxRmEnable = true;
                              }
                              else
                                    network->bCcxRmEnable = false;
                              //
                              // CCXv4 Table 59-1 MBSSID Masks.
                              //
                              network->MBssidMask = network->CcxRmState[1] & 0x07;
                              if(network->MBssidMask != 0)
                              {
                                    network->bMBssidValid = true;
                                    network->MBssidMask = 0xff << (network->MBssidMask);
                                    cpMacAddr(network->MBssid, network->bssid);
                                    network->MBssid[5] &= network->MBssidMask;
                              }
                              else
                              {
                                    network->bMBssidValid = false;
                              }
                        }
                        else
                        {
                              network->bCcxRmEnable = false;
                        }
                  }
                  if(info_element->len > 4  &&
                        info_element->data[0] == 0x00 &&
                        info_element->data[1] == 0x40 &&
                        info_element->data[2] == 0x96 &&
                        info_element->data[3] == 0x03)
                  {
                        if(info_element->len == 5)
                        {
                              network->bWithCcxVerNum = true;
                              network->BssCcxVerNumber = info_element->data[4];
                        }
                        else
                        {
                              network->bWithCcxVerNum = false;
                              network->BssCcxVerNumber = 0;
                        }
                  }
                  break;

            case MFIE_TYPE_RSN:
                  IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
                                   info_element->len);
                  network->rsn_ie_len = min(info_element->len + 2,
                                      MAX_WPA_IE_LEN);
                  memcpy(network->rsn_ie, info_element,
                         network->rsn_ie_len);
                  break;

                        //HT related element.
            case MFIE_TYPE_HT_CAP:
                  IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
                                   info_element->len);
                  tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
                  if(tmp_htcap_len != 0){
                        network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
                        network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
                              sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
                        memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);

                        //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
                        // windows driver will update WMM parameters each beacon received once connected
                                // Linux driver is a bit different.
                        network->bssht.bdSupportHT = true;
                        network->bssht.bdHT1R = ((((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
                  }
                  else{
                        network->bssht.bdSupportHT = false;
                        network->bssht.bdHT1R = false;
                  }
                  break;


            case MFIE_TYPE_HT_INFO:
                  IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
                                   info_element->len);
                  tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
                  if(tmp_htinfo_len){
                        network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
                        network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
                              sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
                        memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
                  }
                  break;

            case MFIE_TYPE_AIRONET:
                  IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
                                   info_element->len);
                  if(info_element->len >IE_CISCO_FLAG_POSITION)
                  {
                        network->bWithAironetIE = true;

                        // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
                        // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
                        //  by adding an Aironet element and setting one or both of the CKIP negotiation bits."
                        if(   (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC)     ||
                              (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK)      )
                        {
                              network->bCkipSupported = true;
                        }
                        else
                        {
                              network->bCkipSupported = false;
                        }
                  }
                  else
                  {
                        network->bWithAironetIE = false;
                        network->bCkipSupported = false;
                  }
                  break;
            case MFIE_TYPE_QOS_PARAMETER:
                  printk(KERN_ERR
                         "QoS Error need to parse QOS_PARAMETER IE\n");
                  break;

#ifdef ENABLE_DOT11D
            case MFIE_TYPE_COUNTRY:
                  IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
                                   info_element->len);
                  //printk("=====>Receive <%s> Country IE\n",network->ssid);
                  ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
                  break;
#endif
/* TODO */
#if 0
                  /* 802.11h */
            case MFIE_TYPE_POWER_CONSTRAINT:
                  network->power_constraint = info_element->data[0];
                  network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
                  break;

            case MFIE_TYPE_CSA:
                  network->power_constraint = info_element->data[0];
                  network->flags |= NETWORK_HAS_CSA;
                  break;

            case MFIE_TYPE_QUIET:
                  network->quiet.count = info_element->data[0];
                  network->quiet.period = info_element->data[1];
                  network->quiet.duration = info_element->data[2];
                  network->quiet.offset = info_element->data[3];
                  network->flags |= NETWORK_HAS_QUIET;
                  break;

            case MFIE_TYPE_IBSS_DFS:
                  if (network->ibss_dfs)
                        break;
                  network->ibss_dfs = kmemdup(info_element->data,
                                        info_element->len,
                                        GFP_ATOMIC);
                  if (!network->ibss_dfs)
                        return 1;
                  network->flags |= NETWORK_HAS_IBSS_DFS;
                  break;

            case MFIE_TYPE_TPC_REPORT:
                  network->tpc_report.transmit_power =
                      info_element->data[0];
                  network->tpc_report.link_margin = info_element->data[1];
                  network->flags |= NETWORK_HAS_TPC_REPORT;
                  break;
#endif
            default:
                  IEEE80211_DEBUG_MGMT
                      ("Unsupported info element: %s (%d)\n",
                       get_info_element_string(info_element->id),
                       info_element->id);
                  break;
            }

            length -= sizeof(*info_element) + info_element->len;
            info_element =
                (struct ieee80211_info_element *)&info_element->
                data[info_element->len];
      }

      if(!network->atheros_cap_exist && !network->broadcom_cap_exist &&
            !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
      {
            network->unknown_cap_exist = true;
      }
      else
      {
            network->unknown_cap_exist = false;
      }
      return 0;
}

static inline u8 ieee80211_SignalStrengthTranslate(
      u8  CurrSS
      )
{
      u8 RetSS;

      // Step 1. Scale mapping.
      if(CurrSS >= 71 && CurrSS <= 100)
      {
            RetSS = 90 + ((CurrSS - 70) / 3);
      }
      else if(CurrSS >= 41 && CurrSS <= 70)
      {
            RetSS = 78 + ((CurrSS - 40) / 3);
      }
      else if(CurrSS >= 31 && CurrSS <= 40)
      {
            RetSS = 66 + (CurrSS - 30);
      }
      else if(CurrSS >= 21 && CurrSS <= 30)
      {
            RetSS = 54 + (CurrSS - 20);
      }
      else if(CurrSS >= 5 && CurrSS <= 20)
      {
            RetSS = 42 + (((CurrSS - 5) * 2) / 3);
      }
      else if(CurrSS == 4)
      {
            RetSS = 36;
      }
      else if(CurrSS == 3)
      {
            RetSS = 27;
      }
      else if(CurrSS == 2)
      {
            RetSS = 18;
      }
      else if(CurrSS == 1)
      {
            RetSS = 9;
      }
      else
      {
            RetSS = CurrSS;
      }
      //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));

      // Step 2. Smoothing.

      //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));

      return RetSS;
}

long ieee80211_translate_todbm(u8 signal_strength_index     )// 0-100 index.
{
      long  signal_power; // in dBm.

      // Translate to dBm (x=0.5y-95).
      signal_power = (long)((signal_strength_index + 1) >> 1);
      signal_power -= 95;

      return signal_power;
}

static inline int ieee80211_network_init(
      struct ieee80211_device *ieee,
      struct ieee80211_probe_response *beacon,
      struct ieee80211_network *network,
      struct ieee80211_rx_stats *stats)
{
#ifdef CONFIG_IEEE80211_DEBUG
      //char rates_str[64];
      //char *p;
#endif

        network->qos_data.active = 0;
        network->qos_data.supported = 0;
        network->qos_data.param_count = 0;
        network->qos_data.old_param_count = 0;

      /* Pull out fixed field data */
      memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
      network->capability = le16_to_cpu(beacon->capability);
      network->last_scanned = jiffies;
      network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
      network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
      network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
      /* Where to pull this? beacon->listen_interval;*/
      network->listen_interval = 0x0A;
      network->rates_len = network->rates_ex_len = 0;
      network->last_associate = 0;
      network->ssid_len = 0;
      network->flags = 0;
      network->atim_window = 0;
      network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
            0x3 : 0x0;
      network->berp_info_valid = false;
        network->broadcom_cap_exist = false;
      network->ralink_cap_exist = false;
      network->atheros_cap_exist = false;
      network->cisco_cap_exist = false;
      network->unknown_cap_exist = false;
      network->realtek_cap_exit = false;
      network->marvell_cap_exist = false;
#ifdef THOMAS_TURBO
      network->Turbo_Enable = 0;
#endif
#ifdef ENABLE_DOT11D
      network->CountryIeLen = 0;
      memset(network->CountryIeBuf, 0, MAX_IE_LEN);
#endif
//Initialize HT parameters
      //ieee80211_ht_initialize(&network->bssht);
      HTInitializeBssDesc(&network->bssht);
      if (stats->freq == IEEE80211_52GHZ_BAND) {
            /* for A band (No DS info) */
            network->channel = stats->received_channel;
      } else
            network->flags |= NETWORK_HAS_CCK;

      network->wpa_ie_len = 0;
      network->rsn_ie_len = 0;

        if (ieee80211_parse_info_param
            (ieee,beacon->info_element, stats->len - sizeof(*beacon), network, stats))
                return 1;

      network->mode = 0;
      if (stats->freq == IEEE80211_52GHZ_BAND)
            network->mode = IEEE_A;
      else {
            if (network->flags & NETWORK_HAS_OFDM)
                  network->mode |= IEEE_G;
            if (network->flags & NETWORK_HAS_CCK)
                  network->mode |= IEEE_B;
      }

      if (network->mode == 0) {
            IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
                             "network.\n",
                             escape_essid(network->ssid,
                                      network->ssid_len),
                             MAC_ARG(network->bssid));
            return 1;
      }

      if(network->bssht.bdSupportHT){
            if(network->mode == IEEE_A)
                  network->mode = IEEE_N_5G;
            else if(network->mode & (IEEE_G | IEEE_B))
                  network->mode = IEEE_N_24G;
      }
      if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
            network->flags |= NETWORK_EMPTY_ESSID;

#if 1
      stats->signal = 30 + (stats->SignalStrength * 70) / 100;
      //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
      stats->noise = ieee80211_translate_todbm((u8)(100-stats->signal)) -25;
#endif

      memcpy(&network->stats, stats, sizeof(network->stats));

      return 0;
}

static inline int is_same_network(struct ieee80211_network *src,
                          struct ieee80211_network *dst, struct ieee80211_device* ieee)
{
      /* A network is only a duplicate if the channel, BSSID, ESSID
       * and the capability field (in particular IBSS and BSS) all match.
       * We treat all <hidden> with the same BSSID and channel
       * as one network */
      return //((src->ssid_len == dst->ssid_len) &&
            (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
            (src->channel == dst->channel) &&
            !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
            //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
            (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
            ((src->capability & WLAN_CAPABILITY_IBSS) ==
            (dst->capability & WLAN_CAPABILITY_IBSS)) &&
            ((src->capability & WLAN_CAPABILITY_BSS) ==
            (dst->capability & WLAN_CAPABILITY_BSS)));
}

static inline void update_network(struct ieee80211_network *dst,
                          struct ieee80211_network *src)
{
      int qos_active;
      u8 old_param;

      memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
      dst->capability = src->capability;
      memcpy(dst->rates, src->rates, src->rates_len);
      dst->rates_len = src->rates_len;
      memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
      dst->rates_ex_len = src->rates_ex_len;
      if(src->ssid_len > 0)
      {
            memset(dst->ssid, 0, dst->ssid_len);
            dst->ssid_len = src->ssid_len;
            memcpy(dst->ssid, src->ssid, src->ssid_len);
      }
      dst->mode = src->mode;
      dst->flags = src->flags;
      dst->time_stamp[0] = src->time_stamp[0];
      dst->time_stamp[1] = src->time_stamp[1];
      if (src->flags & NETWORK_HAS_ERP_VALUE)
      {
            dst->erp_value = src->erp_value;
            dst->berp_info_valid = src->berp_info_valid = true;
      }
      dst->beacon_interval = src->beacon_interval;
      dst->listen_interval = src->listen_interval;
      dst->atim_window = src->atim_window;
      dst->dtim_period = src->dtim_period;
      dst->dtim_data = src->dtim_data;
      dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
      dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
      memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));

        dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
      dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
      dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
      memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
      dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
      memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
      dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
      dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
      dst->broadcom_cap_exist = src->broadcom_cap_exist;
      dst->ralink_cap_exist = src->ralink_cap_exist;
      dst->atheros_cap_exist = src->atheros_cap_exist;
      dst->realtek_cap_exit = src->realtek_cap_exit;
      dst->marvell_cap_exist = src->marvell_cap_exist;
      dst->cisco_cap_exist = src->cisco_cap_exist;
      dst->unknown_cap_exist = src->unknown_cap_exist;
      memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
      dst->wpa_ie_len = src->wpa_ie_len;
      memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
      dst->rsn_ie_len = src->rsn_ie_len;

      dst->last_scanned = jiffies;
      /* qos related parameters */
      //qos_active = src->qos_data.active;
      qos_active = dst->qos_data.active;
      //old_param = dst->qos_data.old_param_count;
      old_param = dst->qos_data.param_count;
      if(dst->flags & NETWORK_HAS_QOS_MASK){
        //not update QOS paramter in beacon, as most AP will set all these parameter to 0.//WB
      //    printk("====>%s(), aifs:%x, %x\n", __FUNCTION__, dst->qos_data.parameters.aifs[0], src->qos_data.parameters.aifs[0]);
      //    memcpy(&dst->qos_data, &src->qos_data,
      //          sizeof(struct ieee80211_qos_data));
      }
      else {
            dst->qos_data.supported = src->qos_data.supported;
            dst->qos_data.param_count = src->qos_data.param_count;
      }

      if(dst->qos_data.supported == 1) {
            dst->QoS_Enable = 1;
            if(dst->ssid_len)
                  IEEE80211_DEBUG_QOS
                        ("QoS the network %s is QoS supported\n",
                        dst->ssid);
            else
                  IEEE80211_DEBUG_QOS
                        ("QoS the network is QoS supported\n");
      }
      dst->qos_data.active = qos_active;
      dst->qos_data.old_param_count = old_param;

      /* dst->last_associate is not overwritten */
#if 1
      dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
      if(src->wmm_param[0].ac_aci_acm_aifsn|| \
         src->wmm_param[1].ac_aci_acm_aifsn|| \
         src->wmm_param[2].ac_aci_acm_aifsn|| \
         src->wmm_param[1].ac_aci_acm_aifsn) {
        memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
      }
      //dst->QoS_Enable = src->QoS_Enable;
#else
      dst->QoS_Enable = 1;//for Rtl8187 simulation
#endif
#ifdef THOMAS_TURBO
      dst->Turbo_Enable = src->Turbo_Enable;
#endif

#ifdef ENABLE_DOT11D
      dst->CountryIeLen = src->CountryIeLen;
      memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
#endif

      //added by amy for LEAP
      dst->bWithAironetIE = src->bWithAironetIE;
      dst->bCkipSupported = src->bCkipSupported;
      memcpy(dst->CcxRmState,src->CcxRmState,2);
      dst->bCcxRmEnable = src->bCcxRmEnable;
      dst->MBssidMask = src->MBssidMask;
      dst->bMBssidValid = src->bMBssidValid;
      memcpy(dst->MBssid,src->MBssid,6);
      dst->bWithCcxVerNum = src->bWithCcxVerNum;
      dst->BssCcxVerNumber = src->BssCcxVerNumber;

}

static inline int is_beacon(__le16 fc)
{
      return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
}

static inline void ieee80211_process_probe_response(
      struct ieee80211_device *ieee,
      struct ieee80211_probe_response *beacon,
      struct ieee80211_rx_stats *stats)
{
      struct ieee80211_network network;
      struct ieee80211_network *target;
      struct ieee80211_network *oldest = NULL;
#ifdef CONFIG_IEEE80211_DEBUG
      struct ieee80211_info_element *info_element = &beacon->info_element[0];
#endif
      unsigned long flags;
      short renew;
      //u8 wmm_info;

      memset(&network, 0, sizeof(struct ieee80211_network));
      IEEE80211_DEBUG_SCAN(
            "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
            escape_essid(info_element->data, info_element->len),
            MAC_ARG(beacon->header.addr3),
            (beacon->capability & (1<<0xf)) ? '1' : '0',
            (beacon->capability & (1<<0xe)) ? '1' : '0',
            (beacon->capability & (1<<0xd)) ? '1' : '0',
            (beacon->capability & (1<<0xc)) ? '1' : '0',
            (beacon->capability & (1<<0xb)) ? '1' : '0',
            (beacon->capability & (1<<0xa)) ? '1' : '0',
            (beacon->capability & (1<<0x9)) ? '1' : '0',
            (beacon->capability & (1<<0x8)) ? '1' : '0',
            (beacon->capability & (1<<0x7)) ? '1' : '0',
            (beacon->capability & (1<<0x6)) ? '1' : '0',
            (beacon->capability & (1<<0x5)) ? '1' : '0',
            (beacon->capability & (1<<0x4)) ? '1' : '0',
            (beacon->capability & (1<<0x3)) ? '1' : '0',
            (beacon->capability & (1<<0x2)) ? '1' : '0',
            (beacon->capability & (1<<0x1)) ? '1' : '0',
            (beacon->capability & (1<<0x0)) ? '1' : '0');

      if (ieee80211_network_init(ieee, beacon, &network, stats)) {
            IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
                             escape_essid(info_element->data,
                                      info_element->len),
                             MAC_ARG(beacon->header.addr3),
                             WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
                             IEEE80211_STYPE_PROBE_RESP ?
                             "PROBE RESPONSE" : "BEACON");
            return;
      }

#ifdef ENABLE_DOT11D
      // For Asus EeePc request,
      // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
      //       wireless adapter should follow the country code.
      // (2)  If there is no any country code in beacon,
      //       then wireless adapter should do active scan from ch1~11 and
      //       passive scan from ch12~14

      if( !IsLegalChannel(ieee, network.channel) )
            return;
      if(ieee->bGlobalDomain)
      {
            if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP)
            {
                  // Case 1: Country code
                  if(IS_COUNTRY_IE_VALID(ieee) )
                  {
                        if( !IsLegalChannel(ieee, network.channel) )
                        {
                              printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
                              return;
                        }
                  }
                  // Case 2: No any country code.
                  else
                  {
                        // Filter over channel ch12~14
                        if(network.channel > 11)
                        {
                              printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
                              return;
                        }
                  }
            }
            else
            {
                  // Case 1: Country code
                  if(IS_COUNTRY_IE_VALID(ieee) )
                  {
                        if( !IsLegalChannel(ieee, network.channel) )
                        {
                              printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel);
                              return;
                        }
                  }
                  // Case 2: No any country code.
                  else
                  {
                        // Filter over channel ch12~14
                        if(network.channel > 14)
                        {
                              printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel);
                              return;
                        }
                  }
            }
      }
#endif

      /* The network parsed correctly -- so now we scan our known networks
       * to see if we can find it in our list.
       *
       * NOTE:  This search is definitely not optimized.  Once its doing
       *        the "right thing" we'll optimize it for efficiency if
       *        necessary */

      /* Search for this entry in the list and update it if it is
       * already there. */

      spin_lock_irqsave(&ieee->lock, flags);

      if(is_same_network(&ieee->current_network, &network, ieee)) {
            update_network(&ieee->current_network, &network);
            if((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
            && ieee->current_network.berp_info_valid){
            if(ieee->current_network.erp_value& ERP_UseProtection)
                  ieee->current_network.buseprotection = true;
            else
                  ieee->current_network.buseprotection = false;
            }
            if(is_beacon(beacon->header.frame_ctl))
            {
                  if(ieee->state == IEEE80211_LINKED)
                        ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
            }
            else //hidden AP
                  network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
      }

      list_for_each_entry(target, &ieee->network_list, list) {
            if (is_same_network(target, &network, ieee))
                  break;
            if ((oldest == NULL) ||
                (target->last_scanned < oldest->last_scanned))
                  oldest = target;
      }

      /* If we didn't find a match, then get a new network slot to initialize
       * with this beacon's information */
      if (&target->list == &ieee->network_list) {
            if (list_empty(&ieee->network_free_list)) {
                  /* If there are no more slots, expire the oldest */
                  list_del(&oldest->list);
                  target = oldest;
                  IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
                                   "network list.\n",
                                   escape_essid(target->ssid,
                                            target->ssid_len),
                                   MAC_ARG(target->bssid));
            } else {
                  /* Otherwise just pull from the free list */
                  target = list_entry(ieee->network_free_list.next,
                                  struct ieee80211_network, list);
                  list_del(ieee->network_free_list.next);
            }


#ifdef CONFIG_IEEE80211_DEBUG
            IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
                             escape_essid(network.ssid,
                                      network.ssid_len),
                             MAC_ARG(network.bssid),
                             WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
                             IEEE80211_STYPE_PROBE_RESP ?
                             "PROBE RESPONSE" : "BEACON");
#endif
            memcpy(target, &network, sizeof(*target));
            list_add_tail(&target->list, &ieee->network_list);
            if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
                  ieee80211_softmac_new_net(ieee,&network);
      } else {
            IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
                             escape_essid(target->ssid,
                                      target->ssid_len),
                             MAC_ARG(target->bssid),
                             WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
                             IEEE80211_STYPE_PROBE_RESP ?
                             "PROBE RESPONSE" : "BEACON");

            /* we have an entry and we are going to update it. But this entry may
             * be already expired. In this case we do the same as we found a new
             * net and call the new_net handler
             */
            renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
            //YJ,add,080819,for hidden ap
            if(is_beacon(beacon->header.frame_ctl) == 0)
                  network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
            //if(strncmp(network.ssid, "linksys-c",9) == 0)
            //    printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
            if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
                && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
                ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
                  renew = 1;
            //YJ,add,080819,for hidden ap,end

            update_network(target, &network);
            if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
                  ieee80211_softmac_new_net(ieee,&network);
      }

      spin_unlock_irqrestore(&ieee->lock, flags);
      if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, &network, ieee)&&\
            (ieee->state == IEEE80211_LINKED)) {
            if(ieee->handle_beacon != NULL) {
                  ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
            }
      }
}

void ieee80211_rx_mgt(struct ieee80211_device *ieee,
                  struct ieee80211_hdr_4addr *header,
                  struct ieee80211_rx_stats *stats)
{
      if(ieee->sta_sleep || (ieee->ps != IEEE80211_PS_DISABLED &&
                        ieee->iw_mode == IW_MODE_INFRA &&
                        ieee->state == IEEE80211_LINKED))
      {
            tasklet_schedule(&ieee->ps_task);
      }

      if(WLAN_FC_GET_STYPE(header->frame_ctl) != IEEE80211_STYPE_PROBE_RESP &&
            WLAN_FC_GET_STYPE(header->frame_ctl) != IEEE80211_STYPE_BEACON)
            ieee->last_rx_ps_time = jiffies;

      switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {

      case IEEE80211_STYPE_BEACON:
            IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
                             WLAN_FC_GET_STYPE(header->frame_ctl));
            IEEE80211_DEBUG_SCAN("Beacon\n");
            ieee80211_process_probe_response(
                  ieee, (struct ieee80211_probe_response *)header, stats);
            break;

      case IEEE80211_STYPE_PROBE_RESP:
            IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
                             WLAN_FC_GET_STYPE(header->frame_ctl));
            IEEE80211_DEBUG_SCAN("Probe response\n");
            ieee80211_process_probe_response(
                  ieee, (struct ieee80211_probe_response *)header, stats);
            break;

      }
}

#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
EXPORT_SYMBOL(ieee80211_rx_mgt);
EXPORT_SYMBOL(ieee80211_rx);
#else
EXPORT_SYMBOL_NOVERS(ieee80211_rx_mgt);
EXPORT_SYMBOL_NOVERS(ieee80211_rx);
#endif

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