/*
* 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_bHandleRxEncryption- Rcv decrypted data via on-fly
* s_byGetRateIdx- get rate index
* s_vGetDASA- get data offset
* s_vProcessRxMACHeader- Rcv 802.11 and translate to 802.3
*
* Revision History:
*
*/
#include "dpc.h"
#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 "wctl.h"
#include "rf.h"
#include "iowpa.h"
#include "datarate.h"
#include "usbpipe.h"
//static int msglevel =MSG_LEVEL_DEBUG;
static int msglevel =MSG_LEVEL_INFO;
static const u8 acbyRxRate[MAX_RATE] =
{2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108};
static u8 s_byGetRateIdx(u8 byRate);
static
void
s_vGetDASA(
u8 * pbyRxBufferAddr,
unsigned int *pcbHeaderSize,
struct ethhdr *psEthHeader
);
static void s_vProcessRxMACHeader(struct vnt_private *pDevice,
u8 *pbyRxBufferAddr, u32 cbPacketSize, int bIsWEP, int bExtIV,
u32 *pcbHeadSize);
static int s_bHandleRxEncryption(struct vnt_private *pDevice, u8 *pbyFrame,
u32 FrameSize, u8 *pbyRsr, u8 *pbyNewRsr, PSKeyItem *pKeyOut,
s32 *pbExtIV, u16 *pwRxTSC15_0, u32 *pdwRxTSC47_16);
/*+
*
* 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,
u8 *pbyRxBufferAddr, u32 cbPacketSize, int bIsWEP, int bExtIV,
u32 *pcbHeadSize)
{
u8 *pbyRxBuffer;
u32 cbHeaderSize = 0;
u16 *pwType;
struct ieee80211_hdr *pMACHeader;
int ii;
pMACHeader = (struct ieee80211_hdr *) (pbyRxBufferAddr + cbHeaderSize);
s_vGetDASA((u8 *)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 = (u8 *) (pbyRxBufferAddr + cbHeaderSize);
if (ether_addr_equal(pbyRxBuffer, pDevice->abySNAP_Bridgetunnel)) {
cbHeaderSize += 6;
} else if (ether_addr_equal(pbyRxBuffer, pDevice->abySNAP_RFC1042)) {
cbHeaderSize += 6;
pwType = (u16 *) (pbyRxBufferAddr + cbHeaderSize);
if ((*pwType == cpu_to_be16(ETH_P_IPX)) ||
(*pwType == cpu_to_le16(0xF380))) {
cbHeaderSize -= 8;
pwType = (u16 *) (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 = (u16 *) (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 = (u8 *) (pbyRxBufferAddr + cbHeaderSize);
for (ii = 0; ii < ETH_ALEN; ii++)
*pbyRxBuffer++ = pDevice->sRxEthHeader.h_dest[ii];
for (ii = 0; ii < ETH_ALEN; ii++)
*pbyRxBuffer++ = pDevice->sRxEthHeader.h_source[ii];
*pcbHeadSize = cbHeaderSize;
}
static u8 s_byGetRateIdx(u8 byRate)
{
u8 byRateIdx;
for (byRateIdx = 0; byRateIdx <MAX_RATE ; byRateIdx++) {
if (acbyRxRate[byRateIdx%MAX_RATE] == byRate)
return byRateIdx;
}
return 0;
}
static
void
s_vGetDASA (
u8 * pbyRxBufferAddr,
unsigned int *pcbHeaderSize,
struct ethhdr *psEthHeader
)
{
unsigned int cbHeaderSize = 0;
struct ieee80211_hdr *pMACHeader;
int ii;
pMACHeader = (struct ieee80211_hdr *) (pbyRxBufferAddr + cbHeaderSize);
if ((pMACHeader->frame_control & FC_TODS) == 0) {
if (pMACHeader->frame_control & FC_FROMDS) {
for (ii = 0; ii < ETH_ALEN; ii++) {
psEthHeader->h_dest[ii] =
pMACHeader->addr1[ii];
psEthHeader->h_source[ii] =
pMACHeader->addr3[ii];
}
} else {
/* IBSS mode */
for (ii = 0; ii < ETH_ALEN; ii++) {
psEthHeader->h_dest[ii] =
pMACHeader->addr1[ii];
psEthHeader->h_source[ii] =
pMACHeader->addr2[ii];
}
}
} else {
/* Is AP mode.. */
if (pMACHeader->frame_control & FC_FROMDS) {
for (ii = 0; ii < ETH_ALEN; ii++) {
psEthHeader->h_dest[ii] =
pMACHeader->addr3[ii];
psEthHeader->h_source[ii] =
pMACHeader->addr4[ii];
cbHeaderSize += 6;
}
} else {
for (ii = 0; ii < ETH_ALEN; ii++) {
psEthHeader->h_dest[ii] =
pMACHeader->addr3[ii];
psEthHeader->h_source[ii] =
pMACHeader->addr2[ii];
}
}
};
*pcbHeaderSize = cbHeaderSize;
}
int RXbBulkInProcessData(struct vnt_private *pDevice, struct vnt_rcb *pRCB,
unsigned long BytesToIndicate)
{
struct net_device_stats *pStats = &pDevice->stats;
struct sk_buff *skb;
struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
struct vnt_rx_mgmt *pRxPacket = &pMgmt->sRxPacket;
struct ieee80211_hdr *p802_11Header;
u8 *pbyRsr, *pbyNewRsr, *pbyRSSI, *pbyFrame;
u64 *pqwTSFTime;
u32 bDeFragRx = false;
u32 cbHeaderOffset, cbIVOffset;
u32 FrameSize;
u16 wEtherType = 0;
s32 iSANodeIndex = -1;
int ii;
u8 *pbyRxSts, *pbyRxRate, *pbySQ, *pby3SQ;
u32 cbHeaderSize;
PSKeyItem pKey = NULL;
u16 wRxTSC15_0 = 0;
u32 dwRxTSC47_16 = 0;
/* signed long ldBm = 0; */
int bIsWEP = false; int bExtIV = false;
u32 dwWbkStatus;
struct vnt_rcb *pRCBIndicate = pRCB;
u8 *pbyDAddress;
u16 *pwPLCP_Length;
u8 abyVaildRate[MAX_RATE]
= {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108};
u16 wPLCPwithPadding;
struct ieee80211_hdr *pMACHeader;
int bRxeapol_key = false;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---------- RXbBulkInProcessData---\n");
skb = pRCB->skb;
/* [31:16]RcvByteCount ( not include 4-byte Status ) */
dwWbkStatus = *((u32 *)(skb->data));
FrameSize = dwWbkStatus >> 16;
FrameSize += 4;
if (BytesToIndicate != FrameSize) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"------- WRONG Length 1\n");
pStats->rx_frame_errors++;
return false;
}
if ((BytesToIndicate > 2372) || (BytesToIndicate <= 40)) {
// Frame Size error drop this packet.
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "---------- WRONG Length 2\n");
pStats->rx_frame_errors++;
return false;
}
pbyDAddress = (u8 *)(skb->data);
pbyRxSts = pbyDAddress+4;
pbyRxRate = pbyDAddress+5;
//real Frame Size = USBFrameSize -4WbkStatus - 4RxStatus - 8TSF - 4RSR - 4SQ3 - ?Padding
//if SQ3 the range is 24~27, if no SQ3 the range is 20~23
//real Frame size in PLCPLength field.
pwPLCP_Length = (u16 *) (pbyDAddress + 6);
//Fix hardware bug => PLCP_Length error
if ( ((BytesToIndicate - (*pwPLCP_Length)) > 27) ||
((BytesToIndicate - (*pwPLCP_Length)) < 24) ||
(BytesToIndicate < (*pwPLCP_Length)) ) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Wrong PLCP Length %x\n", (int) *pwPLCP_Length);
pStats->rx_frame_errors++;
return false;
}
for ( ii=RATE_1M;ii<MAX_RATE;ii++) {
if ( *pbyRxRate == abyVaildRate[ii] ) {
break;
}
}
if ( ii==MAX_RATE ) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Wrong RxRate %x\n",(int) *pbyRxRate);
return false;
}
wPLCPwithPadding = ( (*pwPLCP_Length / 4) + ( (*pwPLCP_Length % 4) ? 1:0 ) ) *4;
pqwTSFTime = (u64 *)(pbyDAddress + 8 + wPLCPwithPadding);
if(pDevice->byBBType == BB_TYPE_11G) {
pby3SQ = pbyDAddress + 8 + wPLCPwithPadding + 12;
pbySQ = pby3SQ;
}
else {
pbySQ = pbyDAddress + 8 + wPLCPwithPadding + 8;
pby3SQ = pbySQ;
}
pbyNewRsr = pbyDAddress + 8 + wPLCPwithPadding + 9;
pbyRSSI = pbyDAddress + 8 + wPLCPwithPadding + 10;
pbyRsr = pbyDAddress + 8 + wPLCPwithPadding + 11;
FrameSize = *pwPLCP_Length;
pbyFrame = pbyDAddress + 8;
pMACHeader = (struct ieee80211_hdr *) pbyFrame;
//mike add: to judge if current AP is activated?
if ((pMgmt->eCurrMode == WMAC_MODE_STANDBY) ||
(pMgmt->eCurrMode == WMAC_MODE_ESS_STA)) {
if (pMgmt->sNodeDBTable[0].bActive) {
if (ether_addr_equal(pMgmt->abyCurrBSSID, pMACHeader->addr2)) {
if (pMgmt->sNodeDBTable[0].uInActiveCount != 0)
pMgmt->sNodeDBTable[0].uInActiveCount = 0;
}
}
}
if (!is_multicast_ether_addr(pMACHeader->addr1)) {
if (WCTLbIsDuplicate(&(pDevice->sDupRxCache), (struct ieee80211_hdr *) pbyFrame)) {
return false;
}
if (!ether_addr_equal(pDevice->abyCurrentNetAddr, pMACHeader->addr1)) {
return false;
}
}
// Use for TKIP MIC
s_vGetDASA(pbyFrame, &cbHeaderSize, &pDevice->sRxEthHeader);
if (ether_addr_equal((u8 *)pDevice->sRxEthHeader.h_source,
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 = (struct ieee80211_hdr *) (pbyFrame);
// get SA NodeIndex
if (BSSbIsSTAInNodeDB(pDevice, (u8 *)(p802_11Header->addr2), &iSANodeIndex)) {
pMgmt->sNodeDBTable[iSANodeIndex].ulLastRxJiffer = jiffies;
pMgmt->sNodeDBTable[iSANodeIndex].uInActiveCount = 0;
}
}
}
if (IS_FC_WEP(pbyFrame)) {
bool bRxDecryOK = false;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"rx WEP pkt\n");
bIsWEP = true;
bRxDecryOK = s_bHandleRxEncryption(pDevice, pbyFrame, FrameSize,
pbyRsr, pbyNewRsr, &pKey, &bExtIV, &wRxTSC15_0, &dwRxTSC47_16);
if (bRxDecryOK) {
if ((*pbyNewRsr & NEWRSR_DECRYPTOK) == 0) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ICV Fail\n");
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)) {
}
return false;
}
} else {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"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 FCS/CRC length */
FrameSize -= ETH_FCS_LEN;
if ( !(*pbyRsr & (RSR_ADDRBROAD | RSR_ADDRMULTI)) && // unicast address
(IS_FRAGMENT_PKT((pbyFrame)))
) {
// defragment
bDeFragRx = WCTLbHandleFragment(pDevice, (struct ieee80211_hdr *) (pbyFrame), FrameSize, bIsWEP, bExtIV);
if (bDeFragRx) {
// defrag complete
// TODO skb, pbyFrame
skb = pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].skb;
FrameSize = pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength;
pbyFrame = skb->data + 8;
}
else {
return false;
}
}
//
// Management & Control frame Handle
//
if ((IS_TYPE_DATA((pbyFrame))) == false) {
// Handle Control & Manage Frame
if (IS_TYPE_MGMT((pbyFrame))) {
u8 * pbyData1;
u8 * pbyData2;
pRxPacket = &(pRCB->sMngPacket);
pRxPacket->p80211Header = (PUWLAN_80211HDR)(pbyFrame);
pRxPacket->cbMPDULen = FrameSize;
pRxPacket->uRSSI = *pbyRSSI;
pRxPacket->bySQ = *pbySQ;
pRxPacket->qwLocalTSF = cpu_to_le64(*pqwTSFTime);
if (bIsWEP) {
// strip IV
pbyData1 = WLAN_HDR_A3_DATA_PTR(pbyFrame);
pbyData2 = WLAN_HDR_A3_DATA_PTR(pbyFrame) + 4;
for (ii = 0; ii < (FrameSize - 4); ii++) {
*pbyData1 = *pbyData2;
pbyData1++;
pbyData2++;
}
}
pRxPacket->byRxRate = s_byGetRateIdx(*pbyRxRate);
if ( *pbyRxSts == 0 ) {
//Discard beacon packet which channel is 0
if ( (WLAN_GET_FC_FSTYPE((pRxPacket->p80211Header->sA3.wFrameCtl)) == WLAN_FSTYPE_BEACON) ||
(WLAN_GET_FC_FSTYPE((pRxPacket->p80211Header->sA3.wFrameCtl)) == WLAN_FSTYPE_PROBERESP) ) {
return false;
}
}
pRxPacket->byRxChannel = (*pbyRxSts) >> 2;
//
// Insert the RCB in the Recv Mng list
//
EnqueueRCB(pDevice->FirstRecvMngList, pDevice->LastRecvMngList, pRCBIndicate);
pDevice->NumRecvMngList++;
if ( bDeFragRx == false) {
pRCB->Ref++;
}
if (pDevice->bIsRxMngWorkItemQueued == false) {
pDevice->bIsRxMngWorkItemQueued = true;
schedule_work(&pDevice->rx_mng_work_item);
}
}
else {
// Control Frame
};
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])) {
DBG_PRT(MSG_LEVEL_ERR,KERN_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 == false) ||
!(*pbyRsr & RSR_BSSIDOK)) {
if (bDeFragRx) {
if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc more frag bufs\n",
pDevice->dev->name);
}
}
return false;
}
//mike add:station mode check eapol-key challenge--->
{
u8 Protocol_Version; //802.1x Authentication
u8 Packet_Type; //802.1x Authentication
u8 Descriptor_type;
u16 Key_info;
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;
Descriptor_type = skb->data[cbIVOffset + 8 + 24 + 6 + 1 +1+1+1+2];
Key_info = (skb->data[cbIVOffset + 8 + 24 + 6 + 1 +1+1+1+2+1]<<8) |skb->data[cbIVOffset + 8 + 24 + 6 + 1 +1+1+1+2+2] ;
if(Descriptor_type==2) { //RSN
// printk("WPA2_Rx_eapol-key_info<-----:%x\n",Key_info);
}
else if(Descriptor_type==254) {
// printk("WPA_Rx_eapol-key_info<-----:%x\n",Key_info);
}
}
}
}
//mike add:station mode check eapol-key challenge<---
}
}
// Data frame Handle
if (pDevice->bEnablePSMode) {
if (IS_FC_MOREDATA((pbyFrame))) {
if (*pbyRsr & RSR_ADDROK) {
//PSbSendPSPOLL((PSDevice)pDevice);
}
}
else {
if (pMgmt->bInTIMWake == true) {
pMgmt->bInTIMWake = false;
}
}
}
// ++++++++ For BaseBand Algorithm +++++++++++++++
pDevice->uCurrRSSI = *pbyRSSI;
pDevice->byCurrSQ = *pbySQ;
// todo
/*
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 ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_TKIP)) {
if (bIsWEP) {
FrameSize -= 8; //MIC
}
}
//--------------------------------------------------------------------------------
// Soft MIC
if ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_TKIP)) {
if (bIsWEP) {
u32 * pdwMIC_L;
u32 * pdwMIC_R;
u32 dwMIC_Priority;
u32 dwMICKey0 = 0, dwMICKey1 = 0;
u32 dwLocalMIC_L = 0;
u32 dwLocalMIC_R = 0;
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 (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((u8 *)&(pDevice->sRxEthHeader.h_dest[0]), 12);
dwMIC_Priority = 0;
MIC_vAppend((u8 *)&dwMIC_Priority, 4);
// 4 is Rcv buffer header, 24 is MAC Header, and 8 is IV and Ext IV.
MIC_vAppend((u8 *)(skb->data + 8 + WLAN_HDR_ADDR3_LEN + 8),
FrameSize - WLAN_HDR_ADDR3_LEN - 8);
MIC_vGetMIC(&dwLocalMIC_L, &dwLocalMIC_R);
MIC_vUnInit();
pdwMIC_L = (u32 *)(skb->data + 8 + FrameSize);
pdwMIC_R = (u32 *)(skb->data + 8 + FrameSize + 4);
if ((cpu_to_le32(*pdwMIC_L) != dwLocalMIC_L) || (cpu_to_le32(*pdwMIC_R) != dwLocalMIC_R) ||
(pDevice->bRxMICFail == true)) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"MIC comparison is fail!\n");
pDevice->bRxMICFail = false;
if (bDeFragRx) {
if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc more frag bufs\n",
pDevice->dev->name);
}
}
//send event to wpa_supplicant
//if(pDevice->bWPASuppWextEnabled == true)
{
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->addr2, ETH_ALEN);
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = sizeof(ev);
PRINT_K("wireless_send_event--->IWEVMICHAELMICFAILURE\n");
wireless_send_event(pDevice->dev, IWEVMICHAELMICFAILURE, &wrqu, (char *)&ev);
}
return false;
}
}
} //---end of SOFT MIC-----------------------------------------------------------------------
// ++++++++++ Reply Counter Check +++++++++++++
if ((pKey != NULL) && ((pKey->byCipherSuite == KEY_CTL_TKIP) ||
(pKey->byCipherSuite == KEY_CTL_CCMP))) {
if (bIsWEP) {
u16 wLocalTSC15_0 = 0;
u32 dwLocalTSC47_16 = 0;
unsigned long long RSC = 0;
// endian issues
RSC = *((unsigned long long *) &(pKey->KeyRSC));
wLocalTSC15_0 = (u16) RSC;
dwLocalTSC47_16 = (u32) (RSC>>16);
RSC = dwRxTSC47_16;
RSC <<= 16;
RSC += wRxTSC15_0;
memcpy(&(pKey->KeyRSC), &RSC, sizeof(u64));
if (pDevice->vnt_mgmt.eCurrMode == WMAC_MODE_ESS_STA &&
pDevice->vnt_mgmt.eCurrState == WMAC_STATE_ASSOC) {
/* check RSC */
if ( (wRxTSC15_0 < wLocalTSC15_0) &&
(dwRxTSC47_16 <= dwLocalTSC47_16) &&
!((dwRxTSC47_16 == 0) && (dwLocalTSC47_16 == 0xFFFFFFFF))) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"TSC is illegal~~!\n ");
if (bDeFragRx) {
if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc more frag bufs\n",
pDevice->dev->name);
}
}
return false;
}
}
}
} // ----- End of Reply Counter Check --------------------------
s_vProcessRxMACHeader(pDevice, (u8 *)(skb->data+8), FrameSize, bIsWEP, bExtIV, &cbHeaderOffset);
FrameSize -= cbHeaderOffset;
cbHeaderOffset += 8; // 8 is Rcv buffer header
// Null data, framesize = 12
if (FrameSize < 12)
return false;
skb->data += cbHeaderOffset;
skb->tail += cbHeaderOffset;
skb_put(skb, FrameSize);
skb->protocol=eth_type_trans(skb, skb->dev);
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])) {
DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc more frag bufs\n",
pDevice->dev->name);
}
return false;
}
return true;
}
static int s_bHandleRxEncryption(struct vnt_private *pDevice, u8 *pbyFrame,
u32 FrameSize, u8 *pbyRsr, u8 *pbyNewRsr, PSKeyItem *pKeyOut,
s32 *pbExtIV, u16 *pwRxTSC15_0, u32 *pdwRxTSC47_16)
{
struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
u32 PayloadLen = FrameSize;
u8 *pbyIV;
u8 byKeyIdx;
PSKeyItem pKey = NULL;
u8 byDecMode = KEY_CTL_WEP;
*pwRxTSC15_0 = 0;
*pdwRxTSC47_16 = 0;
pbyIV = pbyFrame + WLAN_HDR_ADDR3_LEN;
if ( WLAN_GET_FC_TODS(*(u16 *)pbyFrame) &&
WLAN_GET_FC_FROMDS(*(u16 *)pbyFrame) ) {
pbyIV += 6; // 6 is 802.11 address4
PayloadLen -= 6;
}
byKeyIdx = (*(pbyIV+3) & 0xc0);
byKeyIdx >>= 6;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"\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) &&
(pMgmt->byCSSPK != KEY_CTL_NONE)) {
// unicast pkt use pairwise key
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"unicast pkt\n");
if (KeybGetKey(&(pDevice->sKey), pDevice->abyBSSID, 0xFFFFFFFF, &pKey) == true) {
if (pMgmt->byCSSPK == KEY_CTL_TKIP)
byDecMode = KEY_CTL_TKIP;
else if (pMgmt->byCSSPK == KEY_CTL_CCMP)
byDecMode = KEY_CTL_CCMP;
}
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"unicast pkt: %d, %p\n", byDecMode, pKey);
} else {
// use group key
KeybGetKey(&(pDevice->sKey), pDevice->abyBSSID, byKeyIdx, &pKey);
if (pMgmt->byCSSGK == KEY_CTL_TKIP)
byDecMode = KEY_CTL_TKIP;
else if (pMgmt->byCSSGK == KEY_CTL_CCMP)
byDecMode = KEY_CTL_CCMP;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"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 (pMgmt->byCSSGK == KEY_CTL_TKIP)
byDecMode = KEY_CTL_TKIP;
else if (pMgmt->byCSSGK == KEY_CTL_CCMP)
byDecMode = KEY_CTL_CCMP;
}
*pKeyOut = pKey;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"AES:%d %d %d\n", pMgmt->byCSSPK, pMgmt->byCSSGK, byDecMode);
if (pKey == NULL) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"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(*(u32 *)(pbyIV + 4));
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ExtIV: %x\n", *pdwRxTSC47_16);
if (byDecMode == KEY_CTL_TKIP) {
*pwRxTSC15_0 = cpu_to_le16(MAKEWORD(*(pbyIV+2), *pbyIV));
} else {
*pwRxTSC15_0 = cpu_to_le16(*(u16 *)pbyIV);
}
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"TSC0_15: %x\n", *pwRxTSC15_0);
if ((byDecMode == KEY_CTL_TKIP) &&
(pDevice->byLocalID <= REV_ID_VT3253_A1)) {
// Software TKIP
// 1. 3253 A
struct ieee80211_hdr *pMACHeader = (struct ieee80211_hdr *) (pbyFrame);
TKIPvMixKey(pKey->abyKey, pMACHeader->addr2, *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;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ICV OK!\n");
} else {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ICV FAIL!!!\n");
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"PayloadLen = %d\n", PayloadLen);
}
}
}// end of TKIP/AES
if ((*(pbyIV+3) & 0x20) != 0)
*pbExtIV = true;
return true;
}
void RXvWorkItem(struct work_struct *work)
{
struct vnt_private *priv =
container_of(work, struct vnt_private, read_work_item);
int status;
struct vnt_rcb *rcb = NULL;
unsigned long flags;
if (priv->Flags & fMP_DISCONNECTED)
return;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->Rx Polling Thread\n");
spin_lock_irqsave(&priv->lock, flags);
while ((priv->Flags & fMP_POST_READS) && MP_IS_READY(priv) &&
(priv->NumRecvFreeList != 0)) {
rcb = priv->FirstRecvFreeList;
priv->NumRecvFreeList--;
DequeueRCB(priv->FirstRecvFreeList, priv->LastRecvFreeList);
status = PIPEnsBulkInUsbRead(priv, rcb);
}
priv->bIsRxWorkItemQueued = false;
spin_unlock_irqrestore(&priv->lock, flags);
}
void RXvFreeRCB(struct vnt_rcb *rcb, int re_alloc_skb)
{
struct vnt_private *priv = rcb->pDevice;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->RXvFreeRCB\n");
if (re_alloc_skb == false) {
kfree_skb(rcb->skb);
re_alloc_skb = true;
}
if (re_alloc_skb == true) {
rcb->skb = netdev_alloc_skb(priv->dev, priv->rx_buf_sz);
/* TODO error handling */
if (!rcb->skb) {
DBG_PRT(MSG_LEVEL_ERR, KERN_ERR
" Failed to re-alloc rx skb\n");
}
}
/* Insert the RCB back in the Recv free list */
EnqueueRCB(priv->FirstRecvFreeList, priv->LastRecvFreeList, rcb);
priv->NumRecvFreeList++;
if ((priv->Flags & fMP_POST_READS) && MP_IS_READY(priv) &&
(priv->bIsRxWorkItemQueued == false)) {
priv->bIsRxWorkItemQueued = true;
schedule_work(&priv->read_work_item);
}
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"<----RXFreeRCB %d %d\n",
priv->NumRecvFreeList, priv->NumRecvMngList);
}
void RXvMngWorkItem(struct work_struct *work)
{
struct vnt_private *pDevice =
container_of(work, struct vnt_private, rx_mng_work_item);
struct vnt_rcb *pRCB = NULL;
struct vnt_rx_mgmt *pRxPacket;
int bReAllocSkb = false;
unsigned long flags;
if (pDevice->Flags & fMP_DISCONNECTED)
return;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->Rx Mng Thread\n");
while (pDevice->NumRecvMngList!=0)
{
spin_lock_irqsave(&pDevice->lock, flags);
pRCB = pDevice->FirstRecvMngList;
pDevice->NumRecvMngList--;
DequeueRCB(pDevice->FirstRecvMngList, pDevice->LastRecvMngList);
spin_unlock_irqrestore(&pDevice->lock, flags);
if(!pRCB){
break;
}
pRxPacket = &(pRCB->sMngPacket);
vMgrRxManagePacket(pDevice, &pDevice->vnt_mgmt, pRxPacket);
pRCB->Ref--;
if (pRCB->Ref == 0) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"RxvFreeMng %d %d\n",
pDevice->NumRecvFreeList, pDevice->NumRecvMngList);
spin_lock_irqsave(&pDevice->lock, flags);
RXvFreeRCB(pRCB, bReAllocSkb);
spin_unlock_irqrestore(&pDevice->lock, flags);
} else {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Rx Mng Only we have the right to free RCB\n");
}
}
pDevice->bIsRxMngWorkItemQueued = false;
}
