xref: /drivers/staging/vt6655/dpc.c

/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * File: dpc.c
 *
 * Purpose: handle dpc rx functions
 *
 * Author: Lyndon Chen
 *
 * Date: May 20, 2003
 *
 * Functions:
 *      device_receive_frame - Rcv 802.11 frame function
 *      s_bAPModeRxCtl- AP Rcv frame filer Ctl.
 *      s_bAPModeRxData- AP Rcv data frame handle
 *      s_bHandleRxEncryption- Rcv decrypted data via on-fly
 *      s_bHostWepRxEncryption- Rcv encrypted data via host
 *      s_byGetRateIdx- get rate index
 *      s_vGetDASA- get data offset
 *      s_vProcessRxMACHeader- Rcv 802.11 and translate to 802.3
 *
 * Revision History:
 *
 */

#include "device.h"
#include "rxtx.h"
#include "tether.h"
#include "card.h"
#include "bssdb.h"
#include "mac.h"
#include "baseband.h"
#include "michael.h"
#include "tkip.h"
#include "tcrc.h"
#include "wctl.h"
#include "wroute.h"
#include "hostap.h"
#include "rf.h"
#include "iowpa.h"
#include "aes_ccmp.h"
#include "dpc.h"

/*---------------------  Static Definitions -------------------------*/

/*---------------------  Static Classes  ----------------------------*/

/*---------------------  Static Variables  --------------------------*/
static const unsigned char acbyRxRate[MAX_RATE] =
{2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108};

/*---------------------  Static Functions  --------------------------*/

/*---------------------  Static Definitions -------------------------*/

/*---------------------  Static Functions  --------------------------*/

static unsigned char s_byGetRateIdx(unsigned char byRate);

static void
s_vGetDASA(unsigned char *pbyRxBufferAddr, unsigned int *pcbHeaderSize,
	   PSEthernetHeader psEthHeader);

static void
s_vProcessRxMACHeader(struct vnt_private *pDevice, unsigned char *pbyRxBufferAddr,
		      unsigned int cbPacketSize, bool bIsWEP, bool bExtIV,
		      unsigned int *pcbHeadSize);

static bool s_bAPModeRxCtl(
	struct vnt_private *pDevice,
	unsigned char *pbyFrame,
	int      iSANodeIndex
);

static bool s_bAPModeRxData(
	struct vnt_private *pDevice,
	struct sk_buff *skb,
	unsigned int FrameSize,
	unsigned int cbHeaderOffset,
	int      iSANodeIndex,
	int      iDANodeIndex
);

static bool s_bHandleRxEncryption(
	struct vnt_private *pDevice,
	unsigned char *pbyFrame,
	unsigned int FrameSize,
	unsigned char *pbyRsr,
	unsigned char *pbyNewRsr,
	PSKeyItem   *pKeyOut,
	bool *pbExtIV,
	unsigned short *pwRxTSC15_0,
	unsigned long *pdwRxTSC47_16
);

static bool s_bHostWepRxEncryption(

	struct vnt_private *pDevice,
	unsigned char *pbyFrame,
	unsigned int FrameSize,
	unsigned char *pbyRsr,
	bool bOnFly,
	PSKeyItem    pKey,
	unsigned char *pbyNewRsr,
	bool *pbExtIV,
	unsigned short *pwRxTSC15_0,
	unsigned long *pdwRxTSC47_16

);

/*---------------------  Export Variables  --------------------------*/

/*+
 *
 * Description:
 *    Translate Rcv 802.11 header to 802.3 header with Rx buffer
 *
 * Parameters:
 *  In:
 *      pDevice
 *      dwRxBufferAddr  - Address of Rcv Buffer
 *      cbPacketSize    - Rcv Packet size
 *      bIsWEP          - If Rcv with WEP
 *  Out:
 *      pcbHeaderSize   - 802.11 header size
 *
 * Return Value: None
 *
 -*/
static void
s_vProcessRxMACHeader(struct vnt_private *pDevice,
		      unsigned char *pbyRxBufferAddr,
		      unsigned int cbPacketSize, bool bIsWEP, bool bExtIV,
		      unsigned int *pcbHeadSize)
{
	unsigned char *pbyRxBuffer;
	unsigned int cbHeaderSize = 0;
	unsigned short *pwType;
	PS802_11Header  pMACHeader;
	int             ii;

	pMACHeader = (PS802_11Header) (pbyRxBufferAddr + cbHeaderSize);

	s_vGetDASA((unsigned char *)pMACHeader, &cbHeaderSize, &pDevice->sRxEthHeader);

	if (bIsWEP) {
		if (bExtIV) {
			// strip IV&ExtIV , add 8 byte
			cbHeaderSize += (WLAN_HDR_ADDR3_LEN + 8);
		} else {
			// strip IV , add 4 byte
			cbHeaderSize += (WLAN_HDR_ADDR3_LEN + 4);
		}
	} else {
		cbHeaderSize += WLAN_HDR_ADDR3_LEN;
	}

	pbyRxBuffer = (unsigned char *)(pbyRxBufferAddr + cbHeaderSize);
	if (ether_addr_equal(pbyRxBuffer, pDevice->abySNAP_Bridgetunnel)) {
		cbHeaderSize += 6;
	} else if (ether_addr_equal(pbyRxBuffer, pDevice->abySNAP_RFC1042)) {
		cbHeaderSize += 6;
		pwType = (unsigned short *)(pbyRxBufferAddr + cbHeaderSize);
		if ((*pwType != TYPE_PKT_IPX) && (*pwType != cpu_to_le16(0xF380))) {
		} else {
			cbHeaderSize -= 8;
			pwType = (unsigned short *)(pbyRxBufferAddr + cbHeaderSize);
			if (bIsWEP) {
				if (bExtIV)
					*pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN - 8);    // 8 is IV&ExtIV
				else
					*pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN - 4);    // 4 is IV

			} else {
				*pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN);
			}
		}
	} else {
		cbHeaderSize -= 2;
		pwType = (unsigned short *)(pbyRxBufferAddr + cbHeaderSize);
		if (bIsWEP) {
			if (bExtIV)
				*pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN - 8);    // 8 is IV&ExtIV
			else
				*pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN - 4);    // 4 is IV

		} else {
			*pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN);
		}
	}

	cbHeaderSize -= (ETH_ALEN * 2);
	pbyRxBuffer = (unsigned char *)(pbyRxBufferAddr + cbHeaderSize);
	for (ii = 0; ii < ETH_ALEN; ii++)
		*pbyRxBuffer++ = pDevice->sRxEthHeader.abyDstAddr[ii];
	for (ii = 0; ii < ETH_ALEN; ii++)
		*pbyRxBuffer++ = pDevice->sRxEthHeader.abySrcAddr[ii];

	*pcbHeadSize = cbHeaderSize;
}

static unsigned char s_byGetRateIdx(unsigned char byRate)
{
	unsigned char byRateIdx;

	for (byRateIdx = 0; byRateIdx < MAX_RATE; byRateIdx++) {
		if (acbyRxRate[byRateIdx % MAX_RATE] == byRate)
			return byRateIdx;
	}

	return 0;
}

static void
s_vGetDASA(unsigned char *pbyRxBufferAddr, unsigned int *pcbHeaderSize,
	   PSEthernetHeader psEthHeader)
{
	unsigned int cbHeaderSize = 0;
	PS802_11Header  pMACHeader;
	int             ii;

	pMACHeader = (PS802_11Header) (pbyRxBufferAddr + cbHeaderSize);

	if ((pMACHeader->wFrameCtl & FC_TODS) == 0) {
		if (pMACHeader->wFrameCtl & FC_FROMDS) {
			for (ii = 0; ii < ETH_ALEN; ii++) {
				psEthHeader->abyDstAddr[ii] = pMACHeader->abyAddr1[ii];
				psEthHeader->abySrcAddr[ii] = pMACHeader->abyAddr3[ii];
			}
		} else {
			// IBSS mode
			for (ii = 0; ii < ETH_ALEN; ii++) {
				psEthHeader->abyDstAddr[ii] = pMACHeader->abyAddr1[ii];
				psEthHeader->abySrcAddr[ii] = pMACHeader->abyAddr2[ii];
			}
		}
	} else {
		// Is AP mode..
		if (pMACHeader->wFrameCtl & FC_FROMDS) {
			for (ii = 0; ii < ETH_ALEN; ii++) {
				psEthHeader->abyDstAddr[ii] = pMACHeader->abyAddr3[ii];
				psEthHeader->abySrcAddr[ii] = pMACHeader->abyAddr4[ii];
				cbHeaderSize += 6;
			}
		} else {
			for (ii = 0; ii < ETH_ALEN; ii++) {
				psEthHeader->abyDstAddr[ii] = pMACHeader->abyAddr3[ii];
				psEthHeader->abySrcAddr[ii] = pMACHeader->abyAddr2[ii];
			}
		}
	}
	*pcbHeaderSize = cbHeaderSize;
}

bool
device_receive_frame(
	struct vnt_private *pDevice,
	PSRxDesc pCurrRD
)
{
	PDEVICE_RD_INFO  pRDInfo = pCurrRD->pRDInfo;
	struct net_device_stats *pStats = &pDevice->dev->stats;
	struct sk_buff *skb;
	PSMgmtObject    pMgmt = pDevice->pMgmt;
	PSRxMgmtPacket  pRxPacket = &(pDevice->pMgmt->sRxPacket);
	PS802_11Header  p802_11Header;
	unsigned char *pbyRsr;
	unsigned char *pbyNewRsr;
	unsigned char *pbyRSSI;
	__le64 *pqwTSFTime;
	unsigned short *pwFrameSize;
	unsigned char *pbyFrame;
	bool bDeFragRx = false;
	bool bIsWEP = false;
	unsigned int cbHeaderOffset;
	unsigned int FrameSize;
	unsigned short wEtherType = 0;
	int             iSANodeIndex = -1;
	int             iDANodeIndex = -1;
	unsigned int ii;
	unsigned int cbIVOffset;
	bool bExtIV = false;
	unsigned char *pbyRxSts;
	unsigned char *pbyRxRate;
	unsigned char *pbySQ;
	unsigned int cbHeaderSize;
	PSKeyItem       pKey = NULL;
	unsigned short wRxTSC15_0 = 0;
	unsigned long dwRxTSC47_16 = 0;
	SKeyItem        STempKey;
	// 802.11h RPI
	unsigned long dwDuration = 0;
	long            ldBm = 0;
	long            ldBmThreshold = 0;
	PS802_11Header pMACHeader;
	bool bRxeapol_key = false;

	skb = pRDInfo->skb;

	pci_unmap_single(pDevice->pcid, pRDInfo->skb_dma,
			 pDevice->rx_buf_sz, PCI_DMA_FROMDEVICE);

	pwFrameSize = (unsigned short *)(skb->data + 2);
	FrameSize = cpu_to_le16(pCurrRD->m_rd1RD1.wReqCount) - cpu_to_le16(pCurrRD->m_rd0RD0.wResCount);

	// Max: 2312Payload + 30HD +4CRC + 2Padding + 4Len + 8TSF + 4RSR
	// Min (ACK): 10HD +4CRC + 2Padding + 4Len + 8TSF + 4RSR
	if ((FrameSize > 2364) || (FrameSize <= 32)) {
		// Frame Size error drop this packet.
		pr_debug("---------- WRONG Length 1\n");
		return false;
	}

	pbyRxSts = (unsigned char *)(skb->data);
	pbyRxRate = (unsigned char *)(skb->data + 1);
	pbyRsr = (unsigned char *)(skb->data + FrameSize - 1);
	pbyRSSI = (unsigned char *)(skb->data + FrameSize - 2);
	pbyNewRsr = (unsigned char *)(skb->data + FrameSize - 3);
	pbySQ = (unsigned char *)(skb->data + FrameSize - 4);
	pqwTSFTime = (__le64 *)(skb->data + FrameSize - 12);
	pbyFrame = (unsigned char *)(skb->data + 4);

	// get packet size
	FrameSize = cpu_to_le16(*pwFrameSize);

	if ((FrameSize > 2346)|(FrameSize < 14)) { // Max: 2312Payload + 30HD +4CRC
		// Min: 14 bytes ACK
		pr_debug("---------- WRONG Length 2\n");
		return false;
	}

	// update receive statistic counter
	STAvUpdateRDStatCounter(&pDevice->scStatistic,
				*pbyRsr,
				*pbyNewRsr,
				*pbyRxRate,
				pbyFrame,
				FrameSize);

	pMACHeader = (PS802_11Header)((unsigned char *)(skb->data) + 8);

	if (pDevice->bMeasureInProgress) {
		if ((*pbyRsr & RSR_CRCOK) != 0)
			pDevice->byBasicMap |= 0x01;

		dwDuration = (FrameSize << 4);
		dwDuration /= acbyRxRate[*pbyRxRate%MAX_RATE];
		if (*pbyRxRate <= RATE_11M) {
			if (*pbyRxSts & 0x01) {
				// long preamble
				dwDuration += 192;
			} else {
				// short preamble
				dwDuration += 96;
			}
		} else {
			dwDuration += 16;
		}
		RFvRSSITodBm(pDevice, *pbyRSSI, &ldBm);
		ldBmThreshold = -57;
		for (ii = 7; ii > 0;) {
			if (ldBm > ldBmThreshold)
				break;

			ldBmThreshold -= 5;
			ii--;
		}
		pDevice->dwRPIs[ii] += dwDuration;
		return false;
	}

	if (!is_multicast_ether_addr(pbyFrame)) {
		if (WCTLbIsDuplicate(&(pDevice->sDupRxCache), (PS802_11Header)(skb->data + 4))) {
			pDevice->s802_11Counter.FrameDuplicateCount++;
			return false;
		}
	}

	// Use for TKIP MIC
	s_vGetDASA(skb->data+4, &cbHeaderSize, &pDevice->sRxEthHeader);

	// filter packet send from myself
	if (ether_addr_equal(pDevice->sRxEthHeader.abySrcAddr,
			     pDevice->abyCurrentNetAddr))
		return false;

	if ((pMgmt->eCurrMode == WMAC_MODE_ESS_AP) || (pMgmt->eCurrMode == WMAC_MODE_IBSS_STA)) {
		if (IS_CTL_PSPOLL(pbyFrame) || !IS_TYPE_CONTROL(pbyFrame)) {
			p802_11Header = (PS802_11Header)(pbyFrame);
			// get SA NodeIndex
			if (BSSDBbIsSTAInNodeDB(pMgmt, (unsigned char *)(p802_11Header->abyAddr2), &iSANodeIndex)) {
				pMgmt->sNodeDBTable[iSANodeIndex].ulLastRxJiffer = jiffies;
				pMgmt->sNodeDBTable[iSANodeIndex].uInActiveCount = 0;
			}
		}
	}

	if (pMgmt->eCurrMode == WMAC_MODE_ESS_AP) {
		if (s_bAPModeRxCtl(pDevice, pbyFrame, iSANodeIndex))
			return false;
	}

	if (IS_FC_WEP(pbyFrame)) {
		bool bRxDecryOK = false;

		pr_debug("rx WEP pkt\n");
		bIsWEP = true;
		if ((pDevice->bEnableHostWEP) && (iSANodeIndex >= 0)) {
			pKey = &STempKey;
			pKey->byCipherSuite = pMgmt->sNodeDBTable[iSANodeIndex].byCipherSuite;
			pKey->dwKeyIndex = pMgmt->sNodeDBTable[iSANodeIndex].dwKeyIndex;
			pKey->uKeyLength = pMgmt->sNodeDBTable[iSANodeIndex].uWepKeyLength;
			pKey->dwTSC47_16 = pMgmt->sNodeDBTable[iSANodeIndex].dwTSC47_16;
			pKey->wTSC15_0 = pMgmt->sNodeDBTable[iSANodeIndex].wTSC15_0;
			memcpy(pKey->abyKey,
			       &pMgmt->sNodeDBTable[iSANodeIndex].abyWepKey[0],
			       pKey->uKeyLength
);

			bRxDecryOK = s_bHostWepRxEncryption(pDevice,
							    pbyFrame,
							    FrameSize,
							    pbyRsr,
							    pMgmt->sNodeDBTable[iSANodeIndex].bOnFly,
							    pKey,
							    pbyNewRsr,
							    &bExtIV,
							    &wRxTSC15_0,
							    &dwRxTSC47_16);
		} else {
			bRxDecryOK = s_bHandleRxEncryption(pDevice,
							   pbyFrame,
							   FrameSize,
							   pbyRsr,
							   pbyNewRsr,
							   &pKey,
							   &bExtIV,
							   &wRxTSC15_0,
							   &dwRxTSC47_16);
		}

		if (bRxDecryOK) {
			if ((*pbyNewRsr & NEWRSR_DECRYPTOK) == 0) {
				pr_debug("ICV Fail\n");
				if ((pDevice->pMgmt->eAuthenMode == WMAC_AUTH_WPA) ||
				    (pDevice->pMgmt->eAuthenMode == WMAC_AUTH_WPAPSK) ||
				    (pDevice->pMgmt->eAuthenMode == WMAC_AUTH_WPANONE) ||
				    (pDevice->pMgmt->eAuthenMode == WMAC_AUTH_WPA2) ||
				    (pDevice->pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK)) {
					if ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_TKIP))
						pDevice->s802_11Counter.TKIPICVErrors++;
					else if ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_CCMP))
						pDevice->s802_11Counter.CCMPDecryptErrors++;
				}
				return false;
			}
		} else {
			pr_debug("WEP Func Fail\n");
			return false;
		}
		if ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_CCMP))
			FrameSize -= 8;         // Message Integrity Code
		else
			FrameSize -= 4;         // 4 is ICV
	}

	//
	// RX OK
	//
	//remove the CRC length
	FrameSize -= ETH_FCS_LEN;

	if ((!(*pbyRsr & (RSR_ADDRBROAD | RSR_ADDRMULTI))) && // unicast address
	    (IS_FRAGMENT_PKT((skb->data+4)))
) {
		// defragment
		bDeFragRx = WCTLbHandleFragment(pDevice, (PS802_11Header)(skb->data+4), FrameSize, bIsWEP, bExtIV);
		pDevice->s802_11Counter.ReceivedFragmentCount++;
		if (bDeFragRx) {
			// defrag complete
			skb = pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].skb;
			FrameSize = pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength;

		} else {
			return false;
		}
	}

// Management & Control frame Handle
	if ((IS_TYPE_DATA((skb->data+4))) == false) {
		// Handle Control & Manage Frame

		if (IS_TYPE_MGMT((skb->data+4))) {
			unsigned char *pbyData1;
			unsigned char *pbyData2;

			pRxPacket->p80211Header = (PUWLAN_80211HDR)(skb->data+4);
			pRxPacket->cbMPDULen = FrameSize;
			pRxPacket->uRSSI = *pbyRSSI;
			pRxPacket->bySQ = *pbySQ;
			pRxPacket->qwLocalTSF = le64_to_cpu(*pqwTSFTime);
			if (bIsWEP) {
				// strip IV
				pbyData1 = WLAN_HDR_A3_DATA_PTR(skb->data+4);
				pbyData2 = WLAN_HDR_A3_DATA_PTR(skb->data+4) + 4;
				for (ii = 0; ii < (FrameSize - 4); ii++) {
					*pbyData1 = *pbyData2;
					pbyData1++;
					pbyData2++;
				}
			}
			pRxPacket->byRxRate = s_byGetRateIdx(*pbyRxRate);
			pRxPacket->byRxChannel = (*pbyRxSts) >> 2;

			vMgrRxManagePacket((void *)pDevice, pDevice->pMgmt, pRxPacket);

			// hostap Deamon handle 802.11 management
			if (pDevice->bEnableHostapd) {
				skb->dev = pDevice->apdev;
				skb->data += 4;
				skb->tail += 4;
				skb_put(skb, FrameSize);
				skb_reset_mac_header(skb);
				skb->pkt_type = PACKET_OTHERHOST;
				skb->protocol = htons(ETH_P_802_2);
				memset(skb->cb, 0, sizeof(skb->cb));
				netif_rx(skb);
				return true;
			}
		}

		return false;
	} else {
		if (pMgmt->eCurrMode == WMAC_MODE_ESS_AP) {
			//In AP mode, hw only check addr1(BSSID or RA) if equal to local MAC.
			if (!(*pbyRsr & RSR_BSSIDOK)) {
				if (bDeFragRx) {
					if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
						pr_err("%s: can not alloc more frag bufs\n",
						       pDevice->dev->name);
					}
				}
				return false;
			}
		} else {
			// discard DATA packet while not associate || BSSID error
			if (!pDevice->bLinkPass || !(*pbyRsr & RSR_BSSIDOK)) {
				if (bDeFragRx) {
					if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
						pr_err("%s: can not alloc more frag bufs\n",
						       pDevice->dev->name);
					}
				}
				return false;
			}
			//mike add:station mode check eapol-key challenge--->
			{
				unsigned char Protocol_Version;    //802.1x Authentication
				unsigned char Packet_Type;           //802.1x Authentication

				if (bIsWEP)
					cbIVOffset = 8;
				else
					cbIVOffset = 0;
				wEtherType = (skb->data[cbIVOffset + 8 + 24 + 6] << 8) |
					skb->data[cbIVOffset + 8 + 24 + 6 + 1];
				Protocol_Version = skb->data[cbIVOffset + 8 + 24 + 6 + 1 + 1];
				Packet_Type = skb->data[cbIVOffset + 8 + 24 + 6 + 1 + 1 + 1];
				if (wEtherType == ETH_P_PAE) {         //Protocol Type in LLC-Header
					if (((Protocol_Version == 1) || (Protocol_Version == 2)) &&
					    (Packet_Type == 3)) {  //802.1x OR eapol-key challenge frame receive
						bRxeapol_key = true;
					}
				}
			}
			//mike add:station mode check eapol-key challenge<---
		}
	}

// Data frame Handle

	if (pDevice->bEnablePSMode) {
		if (!IS_FC_MOREDATA((skb->data+4))) {
			if (pDevice->pMgmt->bInTIMWake == true)
				pDevice->pMgmt->bInTIMWake = false;
		}
	}

	// Now it only supports 802.11g Infrastructure Mode, and support rate must up to 54 Mbps
	if (pDevice->bDiversityEnable && (FrameSize > 50) &&
	    (pDevice->op_mode == NL80211_IFTYPE_STATION) &&
	    pDevice->bLinkPass) {
		BBvAntennaDiversity(pDevice, s_byGetRateIdx(*pbyRxRate), 0);
	}

	if (pDevice->byLocalID != REV_ID_VT3253_B1)
		pDevice->uCurrRSSI = *pbyRSSI;

	pDevice->byCurrSQ = *pbySQ;

	if ((*pbyRSSI != 0) &&
	    (pMgmt->pCurrBSS != NULL)) {
		RFvRSSITodBm(pDevice, *pbyRSSI, &ldBm);
		// Monitor if RSSI is too strong.
		pMgmt->pCurrBSS->byRSSIStatCnt++;
		pMgmt->pCurrBSS->byRSSIStatCnt %= RSSI_STAT_COUNT;
		pMgmt->pCurrBSS->ldBmAverage[pMgmt->pCurrBSS->byRSSIStatCnt] = ldBm;
		for (ii = 0; ii < RSSI_STAT_COUNT; ii++)
			if (pMgmt->pCurrBSS->ldBmAverage[ii] != 0)
				pMgmt->pCurrBSS->ldBmMAX = max(pMgmt->pCurrBSS->ldBmAverage[ii], ldBm);

	}

	// -----------------------------------------------

	if ((pMgmt->eCurrMode == WMAC_MODE_ESS_AP) && pDevice->bEnable8021x) {
		unsigned char abyMacHdr[24];

		// Only 802.1x packet incoming allowed
		if (bIsWEP)
			cbIVOffset = 8;
		else
			cbIVOffset = 0;
		wEtherType = (skb->data[cbIVOffset + 4 + 24 + 6] << 8) |
			skb->data[cbIVOffset + 4 + 24 + 6 + 1];

		pr_debug("wEtherType = %04x\n", wEtherType);
		if (wEtherType == ETH_P_PAE) {
			skb->dev = pDevice->apdev;

			if (bIsWEP) {
				// strip IV header(8)
				memcpy(&abyMacHdr[0], (skb->data + 4), 24);
				memcpy((skb->data + 4 + cbIVOffset), &abyMacHdr[0], 24);
			}
			skb->data +=  (cbIVOffset + 4);
			skb->tail +=  (cbIVOffset + 4);
			skb_put(skb, FrameSize);
			skb_reset_mac_header(skb);

			skb->pkt_type = PACKET_OTHERHOST;
			skb->protocol = htons(ETH_P_802_2);
			memset(skb->cb, 0, sizeof(skb->cb));
			netif_rx(skb);
			return true;

		}
		// check if 802.1x authorized
		if (!(pMgmt->sNodeDBTable[iSANodeIndex].dwFlags & WLAN_STA_AUTHORIZED))
			return false;
	}

	if ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_TKIP)) {
		if (bIsWEP)
			FrameSize -= 8;  //MIC
	}

	//--------------------------------------------------------------------------------
	// Soft MIC
	if ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_TKIP)) {
		if (bIsWEP) {
			__le32 *pdwMIC_L;
			__le32 *pdwMIC_R;
			__le32 dwMIC_Priority;
			__le32 dwMICKey0 = 0, dwMICKey1 = 0;
			u32 dwLocalMIC_L = 0;
			u32 dwLocalMIC_R = 0;
			viawget_wpa_header *wpahdr;

			if (pMgmt->eCurrMode == WMAC_MODE_ESS_AP) {
				dwMICKey0 = cpu_to_le32(*(u32 *)(&pKey->abyKey[24]));
				dwMICKey1 = cpu_to_le32(*(u32 *)(&pKey->abyKey[28]));
			} else {
				if (pDevice->pMgmt->eAuthenMode == WMAC_AUTH_WPANONE) {
					dwMICKey0 = cpu_to_le32(*(u32 *)(&pKey->abyKey[16]));
					dwMICKey1 = cpu_to_le32(*(u32 *)(&pKey->abyKey[20]));
				} else if ((pKey->dwKeyIndex & BIT28) == 0) {
					dwMICKey0 = cpu_to_le32(*(u32 *)(&pKey->abyKey[16]));
					dwMICKey1 = cpu_to_le32(*(u32 *)(&pKey->abyKey[20]));
				} else {
					dwMICKey0 = cpu_to_le32(*(u32 *)(&pKey->abyKey[24]));
					dwMICKey1 = cpu_to_le32(*(u32 *)(&pKey->abyKey[28]));
				}
			}

			MIC_vInit(dwMICKey0, dwMICKey1);
			MIC_vAppend((unsigned char *)&(pDevice->sRxEthHeader.abyDstAddr[0]), 12);
			dwMIC_Priority = 0;
			MIC_vAppend((unsigned char *)&dwMIC_Priority, 4);
			// 4 is Rcv buffer header, 24 is MAC Header, and 8 is IV and Ext IV.
			MIC_vAppend((unsigned char *)(skb->data + 4 + WLAN_HDR_ADDR3_LEN + 8),
				    FrameSize - WLAN_HDR_ADDR3_LEN - 8);
			MIC_vGetMIC(&dwLocalMIC_L, &dwLocalMIC_R);
			MIC_vUnInit();

			pdwMIC_L = (__le32 *)(skb->data + 4 + FrameSize);
			pdwMIC_R = (__le32 *)(skb->data + 4 + FrameSize + 4);

			if ((le32_to_cpu(*pdwMIC_L) != dwLocalMIC_L) ||
			    (le32_to_cpu(*pdwMIC_R) != dwLocalMIC_R) ||
			    pDevice->bRxMICFail) {
				pr_debug("MIC comparison is fail!\n");
				pDevice->bRxMICFail = false;
				pDevice->s802_11Counter.TKIPLocalMICFailures++;
				if (bDeFragRx) {
					if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
						pr_err("%s: can not alloc more frag bufs\n",
						       pDevice->dev->name);
					}
				}
				//2008-0409-07, <Add> by Einsn Liu
#ifdef WPA_SUPPLICANT_DRIVER_WEXT_SUPPORT
				//send event to wpa_supplicant
				{
					union iwreq_data wrqu;
					struct iw_michaelmicfailure ev;
					int keyidx = pbyFrame[cbHeaderSize+3] >> 6; //top two-bits

					memset(&ev, 0, sizeof(ev));
					ev.flags = keyidx & IW_MICFAILURE_KEY_ID;
					if ((pMgmt->eCurrMode == WMAC_MODE_ESS_STA) &&
					    (pMgmt->eCurrState == WMAC_STATE_ASSOC) &&
					    (*pbyRsr & (RSR_ADDRBROAD | RSR_ADDRMULTI)) == 0) {
						ev.flags |= IW_MICFAILURE_PAIRWISE;
					} else {
						ev.flags |= IW_MICFAILURE_GROUP;
					}

					ev.src_addr.sa_family = ARPHRD_ETHER;
					memcpy(ev.src_addr.sa_data, pMACHeader->abyAddr2, ETH_ALEN);
					memset(&wrqu, 0, sizeof(wrqu));
					wrqu.data.length = sizeof(ev);
					wireless_send_event(pDevice->dev, IWEVMICHAELMICFAILURE, &wrqu, (char *)&ev);

				}
#endif

				if ((pDevice->bWPADEVUp) && (pDevice->skb != NULL)) {
					wpahdr = (viawget_wpa_header *)pDevice->skb->data;
					if ((pDevice->pMgmt->eCurrMode == WMAC_MODE_ESS_STA) &&
					    (pDevice->pMgmt->eCurrState == WMAC_STATE_ASSOC) &&
					    (*pbyRsr & (RSR_ADDRBROAD | RSR_ADDRMULTI)) == 0) {
						wpahdr->type = VIAWGET_PTK_MIC_MSG;
					} else {
						wpahdr->type = VIAWGET_GTK_MIC_MSG;
					}
					wpahdr->resp_ie_len = 0;
					wpahdr->req_ie_len = 0;
					skb_put(pDevice->skb, sizeof(viawget_wpa_header));
					pDevice->skb->dev = pDevice->wpadev;
					skb_reset_mac_header(pDevice->skb);
					pDevice->skb->pkt_type = PACKET_HOST;
					pDevice->skb->protocol = htons(ETH_P_802_2);
					memset(pDevice->skb->cb, 0, sizeof(pDevice->skb->cb));
					netif_rx(pDevice->skb);
					pDevice->skb = dev_alloc_skb((int)pDevice->rx_buf_sz);
				}

				return false;

			}
		}
	} //---end of SOFT MIC-----------------------------------------------------------------------

	// ++++++++++ Reply Counter Check +++++++++++++

	if ((pKey != NULL) && ((pKey->byCipherSuite == KEY_CTL_TKIP) ||
			       (pKey->byCipherSuite == KEY_CTL_CCMP))) {
		if (bIsWEP) {
			unsigned short wLocalTSC15_0 = 0;
			unsigned long dwLocalTSC47_16 = 0;
			unsigned long long       RSC = 0;
			// endian issues
			RSC = *((unsigned long long *)&(pKey->KeyRSC));
			wLocalTSC15_0 = (unsigned short)RSC;
			dwLocalTSC47_16 = (unsigned long)(RSC>>16);

			RSC = dwRxTSC47_16;
			RSC <<= 16;
			RSC += wRxTSC15_0;
			pKey->KeyRSC = RSC;

			if ((pDevice->sMgmtObj.eCurrMode == WMAC_MODE_ESS_STA) &&
			    (pDevice->sMgmtObj.eCurrState == WMAC_STATE_ASSOC)) {
				// check RSC
				if ((wRxTSC15_0 < wLocalTSC15_0) &&
				    (dwRxTSC47_16 <= dwLocalTSC47_16) &&
				    !((dwRxTSC47_16 == 0) && (dwLocalTSC47_16 == 0xFFFFFFFF))) {
					pr_debug("TSC is illegal~~!\n ");
					if (pKey->byCipherSuite == KEY_CTL_TKIP)
						pDevice->s802_11Counter.TKIPReplays++;
					else
						pDevice->s802_11Counter.CCMPReplays++;

					if (bDeFragRx) {
						if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
							pr_err("%s: can not alloc more frag bufs\n",
							       pDevice->dev->name);
						}
					}
					return false;
				}
			}
		}
	} // ----- End of Reply Counter Check --------------------------

	s_vProcessRxMACHeader(pDevice, (unsigned char *)(skb->data+4), FrameSize, bIsWEP, bExtIV, &cbHeaderOffset);
	FrameSize -= cbHeaderOffset;
	cbHeaderOffset += 4;        // 4 is Rcv buffer header

	// Null data, framesize = 14
	if (FrameSize < 15)
		return false;

	if (pMgmt->eCurrMode == WMAC_MODE_ESS_AP) {
		if (!s_bAPModeRxData(pDevice,
				    skb,
				    FrameSize,
				    cbHeaderOffset,
				    iSANodeIndex,
				    iDANodeIndex
)) {
			if (bDeFragRx) {
				if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
					pr_err("%s: can not alloc more frag bufs\n",
					       pDevice->dev->name);
				}
			}
			return false;
		}
	}

	skb->data += cbHeaderOffset;
	skb->tail += cbHeaderOffset;
	skb_put(skb, FrameSize);
	skb->protocol = eth_type_trans(skb, skb->dev);

	//drop frame not met IEEE 802.3

	skb->ip_summed = CHECKSUM_NONE;
	pStats->rx_bytes += skb->len;
	pStats->rx_packets++;
	netif_rx(skb);

	if (bDeFragRx) {
		if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
			pr_err("%s: can not alloc more frag bufs\n",
			       pDevice->dev->name);
		}
		return false;
	}

	return true;
}

static bool s_bAPModeRxCtl(
	struct vnt_private *pDevice,
	unsigned char *pbyFrame,
	int      iSANodeIndex
)
{
	PS802_11Header      p802_11Header;
	CMD_STATUS          Status;
	PSMgmtObject        pMgmt = pDevice->pMgmt;

	if (IS_CTL_PSPOLL(pbyFrame) || !IS_TYPE_CONTROL(pbyFrame)) {
		p802_11Header = (PS802_11Header)(pbyFrame);
		if (!IS_TYPE_MGMT(pbyFrame)) {
			// Data & PS-Poll packet
			// check frame class
			if (iSANodeIndex > 0) {
				// frame class 3 fliter & checking
				if (pMgmt->sNodeDBTable[iSANodeIndex].eNodeState < NODE_AUTH) {
					// send deauth notification
					// reason = (6) class 2 received from nonauth sta
					vMgrDeAuthenBeginSta(pDevice,
							     pMgmt,
							     (unsigned char *)(p802_11Header->abyAddr2),
							     (WLAN_MGMT_REASON_CLASS2_NONAUTH),
							     &Status
);
					pr_debug("dpc: send vMgrDeAuthenBeginSta 1\n");
					return true;
				}
				if (pMgmt->sNodeDBTable[iSANodeIndex].eNodeState < NODE_ASSOC) {
					// send deassoc notification
					// reason = (7) class 3 received from nonassoc sta
					vMgrDisassocBeginSta(pDevice,
							     pMgmt,
							     (unsigned char *)(p802_11Header->abyAddr2),
							     (WLAN_MGMT_REASON_CLASS3_NONASSOC),
							     &Status
);
					pr_debug("dpc: send vMgrDisassocBeginSta 2\n");
					return true;
				}

				if (pMgmt->sNodeDBTable[iSANodeIndex].bPSEnable) {
					// delcare received ps-poll event
					if (IS_CTL_PSPOLL(pbyFrame)) {
						pMgmt->sNodeDBTable[iSANodeIndex].bRxPSPoll = true;
						bScheduleCommand((void *)pDevice, WLAN_CMD_RX_PSPOLL, NULL);
						pr_debug("dpc: WLAN_CMD_RX_PSPOLL 1\n");
					} else {
						// check Data PS state
						// if PW bit off, send out all PS bufferring packets.
						if (!IS_FC_POWERMGT(pbyFrame)) {
							pMgmt->sNodeDBTable[iSANodeIndex].bPSEnable = false;
							pMgmt->sNodeDBTable[iSANodeIndex].bRxPSPoll = true;
							bScheduleCommand((void *)pDevice, WLAN_CMD_RX_PSPOLL, NULL);
							pr_debug("dpc: WLAN_CMD_RX_PSPOLL 2\n");
						}
					}
				} else {
					if (IS_FC_POWERMGT(pbyFrame)) {
						pMgmt->sNodeDBTable[iSANodeIndex].bPSEnable = true;
						// Once if STA in PS state, enable multicast bufferring
						pMgmt->sNodeDBTable[0].bPSEnable = true;
					} else {
						// clear all pending PS frame.
						if (pMgmt->sNodeDBTable[iSANodeIndex].wEnQueueCnt > 0) {
							pMgmt->sNodeDBTable[iSANodeIndex].bPSEnable = false;
							pMgmt->sNodeDBTable[iSANodeIndex].bRxPSPoll = true;
							bScheduleCommand((void *)pDevice, WLAN_CMD_RX_PSPOLL, NULL);
							pr_debug("dpc: WLAN_CMD_RX_PSPOLL 3\n");

						}
					}
				}
			} else {
				vMgrDeAuthenBeginSta(pDevice,
						     pMgmt,
						     (unsigned char *)(p802_11Header->abyAddr2),
						     (WLAN_MGMT_REASON_CLASS2_NONAUTH),
						     &Status
);
				pr_debug("dpc: send vMgrDeAuthenBeginSta 3\n");
				pr_debug("BSSID:%pM\n",
					 p802_11Header->abyAddr3);
				pr_debug("ADDR2:%pM\n",
					 p802_11Header->abyAddr2);
				pr_debug("ADDR1:%pM\n",
					 p802_11Header->abyAddr1);
				pr_debug("dpc: wFrameCtl= %x\n",
					 p802_11Header->wFrameCtl);
				VNSvInPortB(pDevice->PortOffset + MAC_REG_RCR, &(pDevice->byRxMode));
				pr_debug("dpc:pDevice->byRxMode = %x\n",
					 pDevice->byRxMode);
				return true;
			}
		}
	}
	return false;
}

static bool s_bHandleRxEncryption(
	struct vnt_private *pDevice,
	unsigned char *pbyFrame,
	unsigned int FrameSize,
	unsigned char *pbyRsr,
	unsigned char *pbyNewRsr,
	PSKeyItem   *pKeyOut,
	bool *pbExtIV,
	unsigned short *pwRxTSC15_0,
	unsigned long *pdwRxTSC47_16
)
{
	unsigned int PayloadLen = FrameSize;
	unsigned char *pbyIV;
	unsigned char byKeyIdx;
	PSKeyItem       pKey = NULL;
	unsigned char byDecMode = KEY_CTL_WEP;
	PSMgmtObject    pMgmt = pDevice->pMgmt;

	*pwRxTSC15_0 = 0;
	*pdwRxTSC47_16 = 0;

	pbyIV = pbyFrame + WLAN_HDR_ADDR3_LEN;
	if (WLAN_GET_FC_TODS(*(unsigned short *)pbyFrame) &&
	    WLAN_GET_FC_FROMDS(*(unsigned short *)pbyFrame)) {
		pbyIV += 6;             // 6 is 802.11 address4
		PayloadLen -= 6;
	}
	byKeyIdx = (*(pbyIV+3) & 0xc0);
	byKeyIdx >>= 6;
	pr_debug("\nKeyIdx: %d\n", byKeyIdx);

	if ((pMgmt->eAuthenMode == WMAC_AUTH_WPA) ||
	    (pMgmt->eAuthenMode == WMAC_AUTH_WPAPSK) ||
	    (pMgmt->eAuthenMode == WMAC_AUTH_WPANONE) ||
	    (pMgmt->eAuthenMode == WMAC_AUTH_WPA2) ||
	    (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK)) {
		if (((*pbyRsr & (RSR_ADDRBROAD | RSR_ADDRMULTI)) == 0) &&
		    (pDevice->pMgmt->byCSSPK != KEY_CTL_NONE)) {
			// unicast pkt use pairwise key
			pr_debug("unicast pkt\n");
			if (KeybGetKey(&(pDevice->sKey), pDevice->abyBSSID, 0xFFFFFFFF, &pKey) == true) {
				if (pDevice->pMgmt->byCSSPK == KEY_CTL_TKIP)
					byDecMode = KEY_CTL_TKIP;
				else if (pDevice->pMgmt->byCSSPK == KEY_CTL_CCMP)
					byDecMode = KEY_CTL_CCMP;
			}
			pr_debug("unicast pkt: %d, %p\n", byDecMode, pKey);
		} else {
			// use group key
			KeybGetKey(&(pDevice->sKey), pDevice->abyBSSID, byKeyIdx, &pKey);
			if (pDevice->pMgmt->byCSSGK == KEY_CTL_TKIP)
				byDecMode = KEY_CTL_TKIP;
			else if (pDevice->pMgmt->byCSSGK == KEY_CTL_CCMP)
				byDecMode = KEY_CTL_CCMP;
			pr_debug("group pkt: %d, %d, %p\n",
				 byKeyIdx, byDecMode, pKey);
		}
	}
	// our WEP only support Default Key
	if (pKey == NULL) {
		// use default group key
		KeybGetKey(&(pDevice->sKey), pDevice->abyBroadcastAddr, byKeyIdx, &pKey);
		if (pDevice->pMgmt->byCSSGK == KEY_CTL_TKIP)
			byDecMode = KEY_CTL_TKIP;
		else if (pDevice->pMgmt->byCSSGK == KEY_CTL_CCMP)
			byDecMode = KEY_CTL_CCMP;
	}
	*pKeyOut = pKey;

	pr_debug("AES:%d %d %d\n",
		 pDevice->pMgmt->byCSSPK, pDevice->pMgmt->byCSSGK, byDecMode);

	if (pKey == NULL) {
		pr_debug("pKey == NULL\n");

		return false;
	}
	if (byDecMode != pKey->byCipherSuite) {

		*pKeyOut = NULL;
		return false;
	}
	if (byDecMode == KEY_CTL_WEP) {
		// handle WEP
		if ((pDevice->byLocalID <= REV_ID_VT3253_A1) ||
		    (((PSKeyTable)(pKey->pvKeyTable))->bSoftWEP == true)) {
			// Software WEP
			// 1. 3253A
			// 2. WEP 256

			PayloadLen -= (WLAN_HDR_ADDR3_LEN + 4 + 4); // 24 is 802.11 header,4 is IV, 4 is crc
			memcpy(pDevice->abyPRNG, pbyIV, 3);
			memcpy(pDevice->abyPRNG + 3, pKey->abyKey, pKey->uKeyLength);
			rc4_init(&pDevice->SBox, pDevice->abyPRNG, pKey->uKeyLength + 3);
			rc4_encrypt(&pDevice->SBox, pbyIV+4, pbyIV+4, PayloadLen);

			if (ETHbIsBufferCrc32Ok(pbyIV+4, PayloadLen))
				*pbyNewRsr |= NEWRSR_DECRYPTOK;

		}
	} else if ((byDecMode == KEY_CTL_TKIP) ||
		   (byDecMode == KEY_CTL_CCMP)) {
		// TKIP/AES

		PayloadLen -= (WLAN_HDR_ADDR3_LEN + 8 + 4); // 24 is 802.11 header, 8 is IV&ExtIV, 4 is crc
		*pdwRxTSC47_16 = cpu_to_le32(*(unsigned long *)(pbyIV + 4));
		pr_debug("ExtIV: %lx\n", *pdwRxTSC47_16);
		if (byDecMode == KEY_CTL_TKIP)
			*pwRxTSC15_0 = cpu_to_le16(MAKEWORD(*(pbyIV + 2), *pbyIV));
		else
			*pwRxTSC15_0 = cpu_to_le16(*(unsigned short *)pbyIV);

		pr_debug("TSC0_15: %x\n", *pwRxTSC15_0);

		if ((byDecMode == KEY_CTL_TKIP) &&
		    (pDevice->byLocalID <= REV_ID_VT3253_A1)) {
			// Software TKIP
			// 1. 3253 A
			PS802_11Header  pMACHeader = (PS802_11Header)(pbyFrame);

			TKIPvMixKey(pKey->abyKey, pMACHeader->abyAddr2, *pwRxTSC15_0, *pdwRxTSC47_16, pDevice->abyPRNG);
			rc4_init(&pDevice->SBox, pDevice->abyPRNG, TKIP_KEY_LEN);
			rc4_encrypt(&pDevice->SBox, pbyIV+8, pbyIV+8, PayloadLen);
			if (ETHbIsBufferCrc32Ok(pbyIV+8, PayloadLen)) {
				*pbyNewRsr |= NEWRSR_DECRYPTOK;
				pr_debug("ICV OK!\n");
			} else {
				pr_debug("ICV FAIL!!!\n");
				pr_debug("PayloadLen = %d\n", PayloadLen);
			}
		}
	}// end of TKIP/AES

	if ((*(pbyIV+3) & 0x20) != 0)
		*pbExtIV = true;
	return true;
}

static bool s_bHostWepRxEncryption(
	struct vnt_private *pDevice,
	unsigned char *pbyFrame,
	unsigned int FrameSize,
	unsigned char *pbyRsr,
	bool bOnFly,
	PSKeyItem    pKey,
	unsigned char *pbyNewRsr,
	bool *pbExtIV,
	unsigned short *pwRxTSC15_0,
	unsigned long *pdwRxTSC47_16
)
{
	unsigned int PayloadLen = FrameSize;
	unsigned char *pbyIV;
	unsigned char byKeyIdx;
	unsigned char byDecMode = KEY_CTL_WEP;
	PS802_11Header  pMACHeader;

	*pwRxTSC15_0 = 0;
	*pdwRxTSC47_16 = 0;

	pbyIV = pbyFrame + WLAN_HDR_ADDR3_LEN;
	if (WLAN_GET_FC_TODS(*(unsigned short *)pbyFrame) &&
	    WLAN_GET_FC_FROMDS(*(unsigned short *)pbyFrame)) {
		pbyIV += 6;             // 6 is 802.11 address4
		PayloadLen -= 6;
	}
	byKeyIdx = (*(pbyIV+3) & 0xc0);
	byKeyIdx >>= 6;
	pr_debug("\nKeyIdx: %d\n", byKeyIdx);

	if (pDevice->pMgmt->byCSSGK == KEY_CTL_TKIP)
		byDecMode = KEY_CTL_TKIP;
	else if (pDevice->pMgmt->byCSSGK == KEY_CTL_CCMP)
		byDecMode = KEY_CTL_CCMP;

	pr_debug("AES:%d %d %d\n",
		 pDevice->pMgmt->byCSSPK, pDevice->pMgmt->byCSSGK, byDecMode);

	if (byDecMode != pKey->byCipherSuite)
		return false;

	if (byDecMode == KEY_CTL_WEP) {
		// handle WEP
		pr_debug("byDecMode == KEY_CTL_WEP\n");

		if ((pDevice->byLocalID <= REV_ID_VT3253_A1) ||
		    (((PSKeyTable)(pKey->pvKeyTable))->bSoftWEP == true) ||
		    !bOnFly) {
			// Software WEP
			// 1. 3253A
			// 2. WEP 256
			// 3. NotOnFly

			PayloadLen -= (WLAN_HDR_ADDR3_LEN + 4 + 4); // 24 is 802.11 header,4 is IV, 4 is crc
			memcpy(pDevice->abyPRNG, pbyIV, 3);
			memcpy(pDevice->abyPRNG + 3, pKey->abyKey, pKey->uKeyLength);
			rc4_init(&pDevice->SBox, pDevice->abyPRNG, pKey->uKeyLength + 3);
			rc4_encrypt(&pDevice->SBox, pbyIV+4, pbyIV+4, PayloadLen);

			if (ETHbIsBufferCrc32Ok(pbyIV+4, PayloadLen))
				*pbyNewRsr |= NEWRSR_DECRYPTOK;

		}
	} else if ((byDecMode == KEY_CTL_TKIP) ||
		   (byDecMode == KEY_CTL_CCMP)) {
		// TKIP/AES

		PayloadLen -= (WLAN_HDR_ADDR3_LEN + 8 + 4); // 24 is 802.11 header, 8 is IV&ExtIV, 4 is crc
		*pdwRxTSC47_16 = cpu_to_le32(*(unsigned long *)(pbyIV + 4));
		pr_debug("ExtIV: %lx\n", *pdwRxTSC47_16);

		if (byDecMode == KEY_CTL_TKIP)
			*pwRxTSC15_0 = cpu_to_le16(MAKEWORD(*(pbyIV+2), *pbyIV));
		else
			*pwRxTSC15_0 = cpu_to_le16(*(unsigned short *)pbyIV);

		pr_debug("TSC0_15: %x\n", *pwRxTSC15_0);

		if (byDecMode == KEY_CTL_TKIP) {
			if ((pDevice->byLocalID <= REV_ID_VT3253_A1) || !bOnFly) {
				// Software TKIP
				// 1. 3253 A
				// 2. NotOnFly
				pr_debug("soft KEY_CTL_TKIP\n");
				pMACHeader = (PS802_11Header)(pbyFrame);
				TKIPvMixKey(pKey->abyKey, pMACHeader->abyAddr2, *pwRxTSC15_0, *pdwRxTSC47_16, pDevice->abyPRNG);
				rc4_init(&pDevice->SBox, pDevice->abyPRNG, TKIP_KEY_LEN);
				rc4_encrypt(&pDevice->SBox, pbyIV+8, pbyIV+8, PayloadLen);
				if (ETHbIsBufferCrc32Ok(pbyIV+8, PayloadLen)) {
					*pbyNewRsr |= NEWRSR_DECRYPTOK;
					pr_debug("ICV OK!\n");
				} else {
					pr_debug("ICV FAIL!!!\n");
					pr_debug("PayloadLen = %d\n",
						 PayloadLen);
				}
			}
		}

		if (byDecMode == KEY_CTL_CCMP) {
			if (!bOnFly) {
				// Software CCMP
				// NotOnFly
				pr_debug("soft KEY_CTL_CCMP\n");
				if (AESbGenCCMP(pKey->abyKey, pbyFrame, FrameSize)) {
					*pbyNewRsr |= NEWRSR_DECRYPTOK;
					pr_debug("CCMP MIC compare OK!\n");
				} else {
					pr_debug("CCMP MIC fail!\n");
				}
			}
		}

	}// end of TKIP/AES

	if ((*(pbyIV+3) & 0x20) != 0)
		*pbExtIV = true;
	return true;
}

static bool s_bAPModeRxData(
	struct vnt_private *pDevice,
	struct sk_buff *skb,
	unsigned int FrameSize,
	unsigned int cbHeaderOffset,
	int      iSANodeIndex,
	int      iDANodeIndex
)
{
	PSMgmtObject        pMgmt = pDevice->pMgmt;
	bool bRelayAndForward = false;
	bool bRelayOnly = false;
	unsigned char byMask[8] = {1, 2, 4, 8, 0x10, 0x20, 0x40, 0x80};
	unsigned short wAID;

	struct sk_buff *skbcpy = NULL;

	if (FrameSize > CB_MAX_BUF_SIZE)
		return false;
	// check DA
	if (is_multicast_ether_addr((unsigned char *)(skb->data+cbHeaderOffset))) {
		if (pMgmt->sNodeDBTable[0].bPSEnable) {
			skbcpy = dev_alloc_skb((int)pDevice->rx_buf_sz);

			// if any node in PS mode, buffer packet until DTIM.
			if (skbcpy == NULL) {
				pr_info("relay multicast no skb available\n");
			} else {
				skbcpy->dev = pDevice->dev;
				skbcpy->len = FrameSize;
				memcpy(skbcpy->data, skb->data+cbHeaderOffset, FrameSize);
				skb_queue_tail(&(pMgmt->sNodeDBTable[0].sTxPSQueue), skbcpy);

				pMgmt->sNodeDBTable[0].wEnQueueCnt++;
				// set tx map
				pMgmt->abyPSTxMap[0] |= byMask[0];
			}
		} else {
			bRelayAndForward = true;
		}
	} else {
		// check if relay
		if (BSSDBbIsSTAInNodeDB(pMgmt, (unsigned char *)(skb->data+cbHeaderOffset), &iDANodeIndex)) {
			if (pMgmt->sNodeDBTable[iDANodeIndex].eNodeState >= NODE_ASSOC) {
				if (pMgmt->sNodeDBTable[iDANodeIndex].bPSEnable) {
					// queue this skb until next PS tx, and then release.

					skb->data += cbHeaderOffset;
					skb->tail += cbHeaderOffset;
					skb_put(skb, FrameSize);
					skb_queue_tail(&pMgmt->sNodeDBTable[iDANodeIndex].sTxPSQueue, skb);
					pMgmt->sNodeDBTable[iDANodeIndex].wEnQueueCnt++;
					wAID = pMgmt->sNodeDBTable[iDANodeIndex].wAID;
					pMgmt->abyPSTxMap[wAID >> 3] |=  byMask[wAID & 7];
					pr_debug("relay: index= %d, pMgmt->abyPSTxMap[%d]= %d\n",
						 iDANodeIndex, (wAID >> 3),
						 pMgmt->abyPSTxMap[wAID >> 3]);
					return true;
				} else {
					bRelayOnly = true;
				}
			}
		}
	}

	if (bRelayOnly || bRelayAndForward) {
		// relay this packet right now
		if (bRelayAndForward)
			iDANodeIndex = 0;

		if ((pDevice->uAssocCount > 1) && (iDANodeIndex >= 0))
			ROUTEbRelay(pDevice, (unsigned char *)(skb->data + cbHeaderOffset), FrameSize, (unsigned int)iDANodeIndex);

		if (bRelayOnly)
			return false;
	}
	// none associate, don't forward
	if (pDevice->uAssocCount == 0)
		return false;

	return true;
}