Staging: add rtl8187se driver

This is a driver for the Realtek 8187 "SE" wireless PCI devices in some
netbook computers (MSI Wind, and others).  It includes its own copy of
the ieee80211 stack, but it is compiled into the driver to prevend
duplicate symbol issues.

This version comes from Ralink with no authorship, but it is based
on an old version of the rtl8180 driver from Andrea Merello.  It was
hacked up a bit to get it to build properly within the kernel tree and
to properly handle the merged wireless stack within the driver.

Cc: Andrea Merello <andreamrl@tiscali.it>
Cc: linux-wireless <linux-wireless@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1971 insertions, 0 deletions

diff --git a/drivers/staging/rtl8187se/ieee80211/ieee80211_rx.c b/drivers/staging/rtl8187se/ieee80211/ieee80211_rx.c
new file mode 100644
index 00000000000..79ec64959cf
--- /dev/null
+++ b/drivers/staging/rtl8187se/ieee80211/ieee80211_rx.c
@@ -0,0 +1,1971 @@
+/*
+ * 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 *hdr = (struct ieee80211_hdr *)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 *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_3addr_QOS *hdr_3addr_QoS;
+	struct ieee80211_hdr_QOS *hdr_4addr_QoS;
+	u8 tid;
+
+#ifdef _RTL8187_EXT_PATCH_
+	if(ieee->iw_mode == ieee->iw_ext_mode)
+	{
+		tid = (hdr->addr2[ETH_ALEN-2] ^ hdr->addr2[ETH_ALEN-1]) & IEEE80211_QOS_TID;
+	}
+	else
+#endif
+	if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
+	  hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr;
+	  tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
+	  tid = UP2AC(tid);
+	  tid ++;
+	} else if (IEEE80211_QOS_HAS_SEQ(fc)) {
+	  hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS *)hdr;
+	  tid = le16_to_cpu(hdr_3addr_QoS->QOS_ctl) & IEEE80211_QOS_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) +
+				    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 *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_3addr_QOS *hdr_3addr_QoS;
+	struct ieee80211_hdr_QOS *hdr_4addr_QoS;
+	u8 tid;
+
+#ifdef _RTL8187_EXT_PATCH_
+	if(ieee->iw_mode == ieee->iw_ext_mode)
+	{
+		tid = (hdr->addr2[ETH_ALEN-2] ^ hdr->addr2[ETH_ALEN-1]) & IEEE80211_QOS_TID;
+	}
+	else
+#endif
+	if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
+	  hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr;
+	  tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
+	  tid = UP2AC(tid);
+	  tid ++;
+	} else if (IEEE80211_QOS_HAS_SEQ(fc)) {
+	  hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS *)hdr;
+	  tid = le16_to_cpu(hdr_3addr_QoS->QOS_ctl) & IEEE80211_QOS_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)
+{
+	struct ieee80211_hdr *hdr;
+
+	// cheat the the hdr type
+	hdr = (struct ieee80211_hdr *)skb->data;
+
+	/* On the struct stats definition there is written that
+	 * this is not mandatory.... but seems that the probe
+	 * response parser uses it
+	 */
+	rx_stats->len = skb->len;
+	ieee80211_rx_mgt(ieee,(struct ieee80211_hdr *)skb->data,rx_stats);
+
+	if((ieee->state == IEEE80211_LINKED)&&(memcmp(hdr->addr3,ieee->current_network.bssid,ETH_ALEN))) {
+		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 *)
+  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 *hdr;
+	u8 *pos;
+
+	if (skb->len < 24)
+		return 0;
+
+	hdr = (struct ieee80211_hdr *) 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 *hdr;
+	int res, hdrlen;
+
+	if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
+		return 0;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+#ifdef _RTL8187_EXT_PATCH_
+	if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_rx_frame_get_hdrlen))
+	{
+		hdrlen = ieee->ext_patch_ieee80211_rx_frame_get_hdrlen(ieee, skb);
+	}
+	else
+#endif
+	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 *hdr;
+	int res, hdrlen;
+
+	if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
+		return 0;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+#ifdef _RTL8187_EXT_PATCH_
+	if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_rx_frame_get_hdrlen))
+	{
+		hdrlen = ieee->ext_patch_ieee80211_rx_frame_get_hdrlen(ieee, skb);
+	}
+	else
+#endif
+	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 *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_3addr_QOS *hdr_3addr_QoS;
+	struct ieee80211_hdr_QOS *hdr_4addr_QoS;
+	u8 tid;
+
+#ifdef _RTL8187_EXT_PATCH_
+	if(ieee->iw_mode == ieee->iw_ext_mode)
+	{
+		tid = (header->addr2[ETH_ALEN-2] ^ header->addr2[ETH_ALEN-1]) & IEEE80211_QOS_TID;
+	}
+	else
+#endif
+	//TO2DS and QoS
+	if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
+	  hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)header;
+	  tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID;
+	  tid = UP2AC(tid);
+	  tid ++;
+	} else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
+	  hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS*)header;
+	  tid = le16_to_cpu(hdr_3addr_QoS->QOS_ctl) & IEEE80211_QOS_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]) {
+			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:
+#ifdef _RTL8187_EXT_PATCH_
+		if(ieee->iw_mode == ieee->iw_ext_mode)
+		{
+			last_seq = &ieee->last_rxseq_num[tid];
+			last_frag = &ieee->last_rxfrag_num[tid];
+			last_time = &ieee->last_packet_time[tid];
+			break;
+		}
+		else
+#endif
+		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;
+}
+
+
+/* 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 r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
+	struct ieee80211_hdr *hdr;
+	//struct ieee80211_hdr_3addr_QOS *hdr;
+
+	size_t hdrlen;
+	u16 fc, type, stype, sc;
+	struct net_device_stats *stats;
+	unsigned int frag;
+	u8 *payload;
+	u16 ethertype;
+#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;
+
+	//Added for mesh by Lawrence.
+#ifdef _RTL8187_EXT_PATCH_
+	u8 status;
+	u32 flags;
+#endif
+	// cheat the the hdr type
+	hdr = (struct ieee80211_hdr *)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);
+
+//YJ,add,080828,for keep alive
+	if((fc & IEEE80211_FCTL_TODS) != IEEE80211_FCTL_TODS)
+	{
+		if(!memcmp(hdr->addr1,dev->dev_addr, ETH_ALEN))
+		{
+			ieee->NumRxUnicast++;
+		}
+	}
+	else
+	{
+		if(!memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN))
+		{
+			ieee->NumRxUnicast++;
+		}
+	}
+//YJ,add,080828,for keep alive,end
+
+#ifdef _RTL8187_EXT_PATCH_
+	if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_rx_frame_get_hdrlen))
+	{
+		hdrlen = ieee->ext_patch_ieee80211_rx_frame_get_hdrlen(ieee, skb);
+		if(skb->len < hdrlen)
+			goto rx_dropped;
+	}
+	else
+#endif
+	hdrlen = ieee80211_get_hdrlen(fc);
+
+#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->signal;
+		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;
+
+#ifdef _RTL8187_EXT_PATCH_
+	if( ieee->iw_mode == ieee->iw_ext_mode && ieee->ext_patch_ieee80211_rx_mgt_update_expire )
+		ieee->ext_patch_ieee80211_rx_mgt_update_expire( ieee, skb );
+#endif
+
+	// if QoS enabled, should check the sequence for each of the AC
+	if (is_duplicate_packet(ieee, hdr))
+		goto rx_dropped;
+
+
+	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
+
+
+		if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
+			goto rx_dropped;
+		else
+			goto rx_exit;
+	}
+#ifdef _RTL8187_EXT_PATCH_
+	if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_rx_on_rx)
+	{
+		if(ieee->ext_patch_ieee80211_rx_on_rx(ieee, skb, rx_stats, type, stype)==0)
+		{
+			goto rx_exit;
+		}
+	}
+#endif
+
+	/* 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
+
+#ifdef _RTL8187_EXT_PATCH_
+	if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_rx_is_valid_framectl)
+	{
+		if(ieee->ext_patch_ieee80211_rx_is_valid_framectl(ieee, fc, type, stype)==0)
+			goto rx_dropped;
+	}
+	else
+#endif
+	/* 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;
+	}
+
+	ieee->NumRxDataInPeriod++;
+	ieee->NumRxOkTotal++;
+	/* skb: hdr + (possibly fragmented, possibly encrypted) payload */
+
+	if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
+	    (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
+		goto rx_dropped;
+
+	hdr = (struct ieee80211_hdr *) 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 *) 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))
+		goto rx_dropped;
+
+	hdr = (struct ieee80211_hdr *) 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");
+	}
+*/
+	/* skb: hdr + (possible reassembled) full plaintext payload */
+	payload = skb->data + hdrlen;
+	ethertype = (payload[6] << 8) | payload[7];
+
+#ifdef NOT_YET
+	/* If IEEE 802.1X is used, check whether the port is authorized to send
+	 * the received frame. */
+	if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
+		if (ethertype == ETH_P_PAE) {
+			printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
+			       dev->name);
+			if (ieee->hostapd && ieee->apdev) {
+				/* Send IEEE 802.1X frames to the user
+				 * space daemon for processing */
+				prism2_rx_80211(ieee->apdev, skb, rx_stats,
+						PRISM2_RX_MGMT);
+				ieee->apdevstats.rx_packets++;
+				ieee->apdevstats.rx_bytes += skb->len;
+				goto rx_exit;
+			}
+		} else if (!frame_authorized) {
+			printk(KERN_DEBUG "%s: dropped frame from "
+			       "unauthorized port (IEEE 802.1X): "
+			       "ethertype=0x%04x\n",
+			       dev->name, ethertype);
+			goto rx_dropped;
+		}
+	}
+#endif
+
+#ifdef _RTL8187_EXT_PATCH_
+	if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_rx_process_dataframe)
+	{
+	//Added for mesh rx interrupt.
+		//spin_lock_irqsave(&ieee->lock,flags);
+		status = ieee->ext_patch_ieee80211_rx_process_dataframe(ieee, skb, rx_stats);
+		//spin_unlock_irqrestore(&ieee->lock,flags);
+
+		if(status)
+//	if(ieee->ext_patch_ieee80211_rx_process_dataframe(ieee, skb, rx_stats))
+			goto rx_exit;
+		else
+			goto rx_dropped;
+	}
+#endif
+
+	/* convert hdr + possible LLC headers into Ethernet header */
+	if (skb->len - hdrlen >= 8 &&
+	    ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
+	      ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
+	     memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
+		/* remove RFC1042 or Bridge-Tunnel encapsulation and
+		 * replace EtherType */
+		skb_pull(skb, hdrlen + SNAP_SIZE);
+		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
+		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
+	} else {
+		u16 len;
+		/* Leave Ethernet header part of hdr and full payload */
+		skb_pull(skb, hdrlen);
+		len = htons(skb->len);
+		memcpy(skb_push(skb, 2), &len, 2);
+		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
+		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
+	}
+
+#ifdef NOT_YET
+	if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
+		    IEEE80211_FCTL_TODS) &&
+	    skb->len >= ETH_HLEN + ETH_ALEN) {
+		/* Non-standard frame: get addr4 from its bogus location after
+		 * the payload */
+		memcpy(skb->data + ETH_ALEN,
+		       skb->data + skb->len - ETH_ALEN, ETH_ALEN);
+		skb_trim(skb, skb->len - ETH_ALEN);
+	}
+#endif
+
+	stats->rx_packets++;
+	stats->rx_bytes += skb->len;
+
+#ifdef NOT_YET
+	if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
+	    ieee->ap->bridge_packets) {
+		if (dst[0] & 0x01) {
+			/* copy multicast frame both to the higher layers and
+			 * to the wireless media */
+			ieee->ap->bridged_multicast++;
+			skb2 = skb_clone(skb, GFP_ATOMIC);
+			if (skb2 == NULL)
+				printk(KERN_DEBUG "%s: skb_clone failed for "
+				       "multicast frame\n", dev->name);
+		} else if (hostap_is_sta_assoc(ieee->ap, dst)) {
+			/* send frame directly to the associated STA using
+			 * wireless media and not passing to higher layers */
+			ieee->ap->bridged_unicast++;
+			skb2 = skb;
+			skb = NULL;
+		}
+	}
+
+	if (skb2 != NULL) {
+		/* send to wireless media */
+		skb2->protocol = __constant_htons(ETH_P_802_3);
+		skb2->mac.raw = skb2->nh.raw = skb2->data;
+		/* skb2->nh.raw = skb2->data + ETH_HLEN; */
+		skb2->dev = dev;
+		dev_queue_xmit(skb2);
+	}
+
+#endif
+	if (skb) {
+		skb->protocol = eth_type_trans(skb, dev);
+		memset(skb->cb, 0, sizeof(skb->cb));
+		skb->dev = dev;
+		skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
+		ieee->last_rx_ps_time = jiffies;
+		netif_rx(skb);
+	}
+
+ rx_exit:
+#ifdef NOT_YET
+	if (sta)
+		hostap_handle_sta_release(sta);
+#endif
+	return 1;
+
+ rx_dropped:
+	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;
+}
+
+#ifdef _RTL8187_EXT_PATCH_
+int ieee_ext_skb_p80211_to_ether(struct sk_buff *skb, int hdrlen, u8 *dst, u8 *src)
+{
+	u8 *payload;
+	u16 ethertype;
+
+	/* skb: hdr + (possible reassembled) full plaintext payload */
+	payload = skb->data + hdrlen;
+	ethertype = (payload[6] << 8) | payload[7];
+
+	/* convert hdr + possible LLC headers into Ethernet header */
+	if (skb->len - hdrlen >= 8 &&
+	    ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
+	      ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
+	     memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
+		/* remove RFC1042 or Bridge-Tunnel encapsulation and
+		 * replace EtherType */
+		skb_pull(skb, hdrlen + SNAP_SIZE);
+		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
+		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
+	} else {
+		u16 len;
+		/* Leave Ethernet header part of hdr and full payload */
+		skb_pull(skb, hdrlen);
+		len = htons(skb->len);
+		memcpy(skb_push(skb, 2), &len, 2);
+		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
+		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
+	}
+
+	return 1;
+}
+#endif // _RTL8187_EXT_PATCH_
+
+
+#define MGMT_FRAME_FIXED_PART_LENGTH		0x24
+
+static inline int ieee80211_is_ofdm_rate(u8 rate)
+{
+	switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
+	case IEEE80211_OFDM_RATE_6MB:
+	case IEEE80211_OFDM_RATE_9MB:
+	case IEEE80211_OFDM_RATE_12MB:
+	case IEEE80211_OFDM_RATE_18MB:
+	case IEEE80211_OFDM_RATE_24MB:
+	case IEEE80211_OFDM_RATE_36MB:
+	case IEEE80211_OFDM_RATE_48MB:
+	case IEEE80211_OFDM_RATE_54MB:
+		return 1;
+	}
+        return 0;
+}
+
+static inline int ieee80211_SignalStrengthTranslate(
+	int  CurrSS
+	)
+{
+	int 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;
+}
+
+#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 0
+	u32 i = 0;
+	u8 * p = (u8*)info_element->data;
+	printk("-----------------------\n");
+	printk("%s Country IE:", network->ssid);
+	for(i=0; i<info_element->len; i++)
+		printk("\t%2.2x", *(p+i));
+	printk("\n-----------------------\n");
+#endif
+	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_TranslateToDbm(
+	unsigned char SignalStrengthIndex	// 0-100 index.
+	)
+{
+	unsigned char SignalPower; // in dBm.
+
+	// Translate to dBm (x=0.5y-95).
+	SignalPower = (int)SignalStrengthIndex * 7 / 10;
+	SignalPower -= 95;
+
+	return SignalPower;
+}
+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
+	struct ieee80211_info_element *info_element;
+ 	u16 left;
+	u8 i;
+	short offset;
+	u8 curRate = 0,hOpRate = 0,curRate_ex = 0;
+
+	/* Pull out fixed field data */
+	memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
+	network->capability = beacon->capability;
+	network->last_scanned = jiffies;
+	network->time_stamp[0] = beacon->time_stamp[0];
+	network->time_stamp[1] = beacon->time_stamp[1];
+	network->beacon_interval = 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->QoS_Enable = 0;
+//by amy 080312
+	network->HighestOperaRate = 0;
+//by amy 080312
+#ifdef THOMAS_TURBO
+	network->Turbo_Enable = 0;
+#endif
+#ifdef ENABLE_DOT11D
+	network->CountryIeLen = 0;
+	memset(network->CountryIeBuf, 0, MAX_IE_LEN);
+#endif
+
+	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;
+
+ 	info_element = &beacon->info_element;
+	left = stats->len - ((void *)info_element - (void *)beacon);
+	while (left >= sizeof(struct ieee80211_info_element_hdr)) {
+		if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) {
+			IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n",
+					     info_element->len + sizeof(struct ieee80211_info_element),
+					     left);
+			return 1;
+               	}
+
+		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_SCAN("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];
+				curRate = network->rates[i] & 0x7f;
+				if( hOpRate < curRate )
+					hOpRate = curRate;
+#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_SCAN("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];
+				curRate_ex = network->rates_ex[i] & 0x7f;
+				if( hOpRate < curRate_ex )
+					hOpRate = curRate_ex;
+#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_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
+					     rates_str, network->rates_ex_len);
+			break;
+
+		case MFIE_TYPE_DS_SET:
+  			IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
+					     info_element->data[0]);
+			if (stats->freq == IEEE80211_24GHZ_BAND)
+				network->channel = info_element->data[0];
+			break;
+
+	 	case MFIE_TYPE_FH_SET:
+  			IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
+			break;
+
+		case MFIE_TYPE_CF_SET:
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
+			break;
+
+		case MFIE_TYPE_TIM:
+
+			if(info_element->len < 4)
+				break;
+
+			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
+			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);
+
+			/* add and modified for ps 2008.1.22 */
+			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) ;
+
+		//	printk("offset:%x data:%x, ucast:%d\n", offset,
+			//	info_element->data[3+offset] ,
+			//	info_element->data[3+offset] & (1<<(ieee->assoc_id%8)));
+
+			if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8))) {
+				network->dtim_data |= IEEE80211_DTIM_UCAST;
+			}
+			break;
+
+		case MFIE_TYPE_IBSS_SET:
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
+			break;
+
+		case MFIE_TYPE_CHALLENGE:
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
+			break;
+
+		case MFIE_TYPE_GENERIC:
+			//nic is 87B
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
+					     info_element->len);
+			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);
+			}
+
+#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
+			if (1 == stats->nic_type) {//nic 87
+				break;
+			}
+
+			if (info_element->len >= 5  &&
+			    info_element->data[0] == 0x00 &&
+			    info_element->data[1] == 0x50 &&
+			    info_element->data[2] == 0xf2 &&
+			    info_element->data[3] == 0x02 &&
+			    info_element->data[4] == 0x00) {
+				//printk(KERN_WARNING "wmm info updated: %x\n", info_element->data[6]);
+				//WMM Information Element
+				network->wmm_info = info_element->data[6];
+				network->QoS_Enable = 1;
+			}
+
+			if (info_element->len >= 8  &&
+			    info_element->data[0] == 0x00 &&
+			    info_element->data[1] == 0x50 &&
+			    info_element->data[2] == 0xf2 &&
+			    info_element->data[3] == 0x02 &&
+			    info_element->data[4] == 0x01) {
+				// Not care about version at present.
+				//WMM Information Element
+				//printk(KERN_WARNING "wmm info&param updated: %x\n", info_element->data[6]);
+				network->wmm_info = info_element->data[6];
+				//WMM Parameter Element
+				memcpy(network->wmm_param, (u8 *)(info_element->data + 8),(info_element->len - 8));
+				network->QoS_Enable = 1;
+			}
+			break;
+
+		case MFIE_TYPE_RSN:
+			IEEE80211_DEBUG_SCAN("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;
+#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, beacon->header.addr2);
+			break;
+#endif
+		default:
+			IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
+					     info_element->id);
+                        break;
+  		}
+
+		left -= sizeof(struct ieee80211_info_element_hdr) +
+			info_element->len;
+		info_element = (struct ieee80211_info_element *)
+                	&info_element->data[info_element->len];
+  	}
+//by amy 080312
+	network->HighestOperaRate = hOpRate;
+//by amy 080312
+	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 (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
+		network->flags |= NETWORK_EMPTY_ESSID;
+#if 0
+	stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
+#endif
+	stats->signal = ieee80211_TranslateToDbm(stats->signalstrength);
+	//stats->noise = stats->signal - stats->noise;
+	stats->noise = ieee80211_TranslateToDbm(100 - stats->signalstrength) - 25;
+	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) || (ieee->iw_mode == IW_MODE_INFRA)) &&  //YJ,mod,080819,for hidden ap
+		//((src->ssid_len == dst->ssid_len) &&
+		(src->channel == dst->channel) &&
+		!memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
+		(!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
+		//!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
+		((src->capability & WLAN_CAPABILITY_IBSS) ==
+		(dst->capability & WLAN_CAPABILITY_IBSS)) &&
+		((src->capability & WLAN_CAPABILITY_BSS) ==
+		(dst->capability & WLAN_CAPABILITY_BSS)));
+}
+
+inline void update_network(struct ieee80211_network *dst,
+				  struct ieee80211_network *src)
+{
+	unsigned char quality = src->stats.signalstrength;
+	unsigned char signal = 0;
+	unsigned char noise = 0;
+        if(dst->stats.signalstrength > 0) {
+                quality = (dst->stats.signalstrength * 5 + src->stats.signalstrength + 5)/6;
+        }
+	signal = ieee80211_TranslateToDbm(quality);
+	//noise = signal - src->stats.noise;
+	if(dst->stats.noise > 0)
+		noise = (dst->stats.noise * 5 + src->stats.noise)/6;
+        //if(strcmp(dst->ssid, "linksys_lzm000") == 0)
+//	printk("ssid:%s, quality:%d, signal:%d\n", dst->ssid, quality, signal);
+	memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
+	dst->stats.signalstrength = quality;
+	dst->stats.signal = signal;
+//	printk("==================>stats.signal is %d\n",dst->stats.signal);
+	dst->stats.noise = noise;
+
+
+	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;
+	dst->HighestOperaRate= src->HighestOperaRate;
+	//printk("==========>in %s: src->ssid is %s,chan is %d\n",__FUNCTION__,src->ssid,src->channel);
+
+	//YJ,add,080819,for hidden ap
+	if(src->ssid_len > 0)
+	{
+		//if(src->ssid_len == 13)
+		//	printk("=====================>>>>>>>> Dst ssid: %s Src ssid: %s\n", dst->ssid, src->ssid);
+		memset(dst->ssid, 0, dst->ssid_len);
+		dst->ssid_len = src->ssid_len;
+		memcpy(dst->ssid, src->ssid, src->ssid_len);
+	}
+	//YJ,add,080819,for hidden ap,end
+
+	dst->channel = src->channel;
+	dst->mode = src->mode;
+	dst->flags = src->flags;
+	dst->time_stamp[0] = src->time_stamp[0];
+	dst->time_stamp[1] = src->time_stamp[1];
+
+	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];
+//	printk("update:%s, dtim_period:%x, dtim_data:%x\n", src->ssid, src->dtim_period, src->dtim_data);
+	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;
+	/* dst->last_associate is not overwritten */
+// disable QoS process now, added by David 2006/7/25
+#if 1
+	dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
+/*
+	if((dst->wmm_info^src->wmm_info)&0x0f) {//Param Set Count change, update Parameter
+	  memcpy(dst->wmm_param, src->wmm_param, IEEE80211_AC_PRAM_LEN);
+	}
+*/
+	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
+	dst->SignalStrength = src->SignalStrength;
+#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
+}
+
+
+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;
+#endif
+	unsigned long flags;
+	short renew;
+	u8 wmm_info;
+	u8 is_beacon = (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON)? 1:0;  //YJ,add,080819,for hidden ap
+
+	memset(&network, 0, sizeof(struct ieee80211_network));
+//rz
+#ifdef _RTL8187_EXT_PATCH_
+	if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_process_probe_response_1) {
+		ieee->ext_patch_ieee80211_process_probe_response_1(ieee, beacon, stats);
+		return;
+	}
+#endif
+
+	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 0
+	if(strcmp(escape_essid(beacon->info_element.data, beacon->info_element.len), "rtl_softap") == 0)
+	{
+		if(WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON)
+		{
+			u32 i = 0, len = stats->len;
+			u8 * p = (u8*)beacon;
+			printk("-----------------------\n");
+			printk("rtl_softap Beacon:");
+			for(i=0; i<len; i++)
+				printk("\t%2.2x", *(p+i));
+			printk("\n-----------------------\n");
+		}
+	}
+#endif
+	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(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)) {
+		wmm_info = ieee->current_network.wmm_info;
+		//YJ,add,080819,for hidden ap
+		if(is_beacon == 0)
+			network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
+		else if(ieee->state == IEEE80211_LINKED)
+			ieee->NumRxBcnInPeriod++;
+		//YJ,add,080819,for hidden ap,end
+		//printk("====>network.ssid=%s cur_ssid=%s\n", network.ssid, ieee->current_network.ssid);
+		update_network(&ieee->current_network, &network);
+	}
+
+	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
+
+#ifdef _RTL8187_EXT_PATCH_
+	network.ext_entry = target->ext_entry;
+#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 == 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);
+}
+
+void ieee80211_rx_mgt(struct ieee80211_device *ieee,
+		      struct ieee80211_hdr *header,
+		      struct ieee80211_rx_stats *stats)
+{
+	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;
+//rz
+#ifdef _RTL8187_EXT_PATCH_
+	case IEEE80211_STYPE_PROBE_REQ:
+		IEEE80211_DEBUG_MGMT("received PROBE REQUEST (%d)\n",
+				     WLAN_FC_GET_STYPE(header->frame_ctl));
+		IEEE80211_DEBUG_SCAN("Probe request\n");
+		///
+		if( ieee->iw_mode == ieee->iw_ext_mode && ieee->ext_patch_ieee80211_rx_mgt_on_probe_req )
+			ieee->ext_patch_ieee80211_rx_mgt_on_probe_req( ieee, (struct ieee80211_probe_request *)header, stats);
+		break;
+#endif // _RTL8187_EXT_PATCH_
+
+	}
+}
+
+#if 0
+EXPORT_SYMBOL(ieee80211_rx_mgt);
+EXPORT_SYMBOL(ieee80211_rx);
+EXPORT_SYMBOL(ieee80211_network_init);
+#ifdef _RTL8187_EXT_PATCH_
+EXPORT_SYMBOL(ieee_ext_skb_p80211_to_ether);
+#endif
+#endif