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/*
*************************************************************************
* Ralink Tech Inc.
* 5F., No.36, Taiyuan St., Jhubei City,
* Hsinchu County 302,
* Taiwan, R.O.C.
*
* (c) Copyright 2002-2007, Ralink Technology, Inc.
*
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
*************************************************************************
Module Name:
sanity.c
Abstract:
Revision History:
Who When What
-------- ---------- ----------------------------------------------
John Chang 2004-09-01 add WMM support
*/
#include "../rt_config.h"
extern UCHAR CISCO_OUI[];
extern UCHAR WPA_OUI[];
extern UCHAR RSN_OUI[];
extern UCHAR WME_INFO_ELEM[];
extern UCHAR WME_PARM_ELEM[];
extern UCHAR Ccx2QosInfo[];
extern UCHAR RALINK_OUI[];
extern UCHAR BROADCOM_OUI[];
/*
==========================================================================
Description:
MLME message sanity check
Return:
TRUE if all parameters are OK, FALSE otherwise
==========================================================================
*/
BOOLEAN MlmeStartReqSanity(
IN PRTMP_ADAPTER pAd,
IN VOID *Msg,
IN ULONG MsgLen,
OUT CHAR Ssid[],
OUT UCHAR *pSsidLen)
{
MLME_START_REQ_STRUCT *Info;
Info = (MLME_START_REQ_STRUCT *)(Msg);
if (Info->SsidLen > MAX_LEN_OF_SSID)
{
DBGPRINT(RT_DEBUG_TRACE, ("MlmeStartReqSanity fail - wrong SSID length\n"));
return FALSE;
}
*pSsidLen = Info->SsidLen;
NdisMoveMemory(Ssid, Info->Ssid, *pSsidLen);
return TRUE;
}
/*
==========================================================================
Description:
MLME message sanity check
Return:
TRUE if all parameters are OK, FALSE otherwise
IRQL = DISPATCH_LEVEL
==========================================================================
*/
BOOLEAN PeerAssocRspSanity(
IN PRTMP_ADAPTER pAd,
IN VOID *pMsg,
IN ULONG MsgLen,
OUT PUCHAR pAddr2,
OUT USHORT *pCapabilityInfo,
OUT USHORT *pStatus,
OUT USHORT *pAid,
OUT UCHAR SupRate[],
OUT UCHAR *pSupRateLen,
OUT UCHAR ExtRate[],
OUT UCHAR *pExtRateLen,
OUT HT_CAPABILITY_IE *pHtCapability,
OUT ADD_HT_INFO_IE *pAddHtInfo, // AP might use this additional ht info IE
OUT UCHAR *pHtCapabilityLen,
OUT UCHAR *pAddHtInfoLen,
OUT UCHAR *pNewExtChannelOffset,
OUT PEDCA_PARM pEdcaParm,
OUT UCHAR *pCkipFlag)
{
CHAR IeType, *Ptr;
PFRAME_802_11 pFrame = (PFRAME_802_11)pMsg;
PEID_STRUCT pEid;
ULONG Length = 0;
*pNewExtChannelOffset = 0xff;
*pHtCapabilityLen = 0;
*pAddHtInfoLen = 0;
COPY_MAC_ADDR(pAddr2, pFrame->Hdr.Addr2);
Ptr = pFrame->Octet;
Length += LENGTH_802_11;
NdisMoveMemory(pCapabilityInfo, &pFrame->Octet[0], 2);
Length += 2;
NdisMoveMemory(pStatus, &pFrame->Octet[2], 2);
Length += 2;
*pCkipFlag = 0;
*pExtRateLen = 0;
pEdcaParm->bValid = FALSE;
if (*pStatus != MLME_SUCCESS)
return TRUE;
NdisMoveMemory(pAid, &pFrame->Octet[4], 2);
Length += 2;
// Aid already swaped byte order in RTMPFrameEndianChange() for big endian platform
*pAid = (*pAid) & 0x3fff; // AID is low 14-bit
// -- get supported rates from payload and advance the pointer
IeType = pFrame->Octet[6];
*pSupRateLen = pFrame->Octet[7];
if ((IeType != IE_SUPP_RATES) || (*pSupRateLen > MAX_LEN_OF_SUPPORTED_RATES))
{
DBGPRINT(RT_DEBUG_TRACE, ("PeerAssocRspSanity fail - wrong SupportedRates IE\n"));
return FALSE;
}
else
NdisMoveMemory(SupRate, &pFrame->Octet[8], *pSupRateLen);
Length = Length + 2 + *pSupRateLen;
// many AP implement proprietary IEs in non-standard order, we'd better
// tolerate mis-ordered IEs to get best compatibility
pEid = (PEID_STRUCT) &pFrame->Octet[8 + (*pSupRateLen)];
// get variable fields from payload and advance the pointer
while ((Length + 2 + pEid->Len) <= MsgLen)
{
switch (pEid->Eid)
{
case IE_EXT_SUPP_RATES:
if (pEid->Len <= MAX_LEN_OF_SUPPORTED_RATES)
{
NdisMoveMemory(ExtRate, pEid->Octet, pEid->Len);
*pExtRateLen = pEid->Len;
}
break;
case IE_HT_CAP:
case IE_HT_CAP2:
if (pEid->Len >= SIZE_HT_CAP_IE) //Note: allow extension.!!
{
NdisMoveMemory(pHtCapability, pEid->Octet, SIZE_HT_CAP_IE);
*(USHORT *)(&pHtCapability->HtCapInfo) = cpu2le16(*(USHORT *)(&pHtCapability->HtCapInfo));
*(USHORT *)(&pHtCapability->ExtHtCapInfo) = cpu2le16(*(USHORT *)(&pHtCapability->ExtHtCapInfo));
*pHtCapabilityLen = SIZE_HT_CAP_IE;
}
else
{
DBGPRINT(RT_DEBUG_WARN, ("PeerAssocRspSanity - wrong IE_HT_CAP. \n"));
}
break;
#ifdef DOT11_N_SUPPORT
case IE_ADD_HT:
case IE_ADD_HT2:
if (pEid->Len >= sizeof(ADD_HT_INFO_IE))
{
// This IE allows extension, but we can ignore extra bytes beyond our knowledge , so only
// copy first sizeof(ADD_HT_INFO_IE)
NdisMoveMemory(pAddHtInfo, pEid->Octet, sizeof(ADD_HT_INFO_IE));
*(USHORT *)(&pAddHtInfo->AddHtInfo2) = cpu2le16(*(USHORT *)(&pAddHtInfo->AddHtInfo2));
*(USHORT *)(&pAddHtInfo->AddHtInfo3) = cpu2le16(*(USHORT *)(&pAddHtInfo->AddHtInfo3));
*pAddHtInfoLen = SIZE_ADD_HT_INFO_IE;
}
else
{
DBGPRINT(RT_DEBUG_WARN, ("PeerAssocRspSanity - wrong IE_ADD_HT. \n"));
}
break;
case IE_SECONDARY_CH_OFFSET:
if (pEid->Len == 1)
{
*pNewExtChannelOffset = pEid->Octet[0];
}
else
{
DBGPRINT(RT_DEBUG_WARN, ("PeerAssocRspSanity - wrong IE_SECONDARY_CH_OFFSET. \n"));
}
#endif // DOT11_N_SUPPORT //
break;
case IE_AIRONET_CKIP:
// 0. Check Aironet IE length, it must be larger or equal to 28
// Cisco's AP VxWork version(will not be supported) used this IE length as 28
// Cisco's AP IOS version used this IE length as 30
if (pEid->Len < (CKIP_NEGOTIATION_LENGTH - 2))
break;
// 1. Copy CKIP flag byte to buffer for process
*pCkipFlag = *(pEid->Octet + 8);
break;
case IE_AIRONET_IPADDRESS:
if (pEid->Len != 0x0A)
break;
// Get Cisco Aironet IP information
if (NdisEqualMemory(pEid->Octet, CISCO_OUI, 3) == 1)
NdisMoveMemory(pAd->StaCfg.AironetIPAddress, pEid->Octet + 4, 4);
break;
// CCX2, WMM use the same IE value
// case IE_CCX_V2:
case IE_VENDOR_SPECIFIC:
// handle WME PARAMTER ELEMENT
if (NdisEqualMemory(pEid->Octet, WME_PARM_ELEM, 6) && (pEid->Len == 24))
{
PUCHAR ptr;
int i;
// parsing EDCA parameters
pEdcaParm->bValid = TRUE;
pEdcaParm->bQAck = FALSE; // pEid->Octet[0] & 0x10;
pEdcaParm->bQueueRequest = FALSE; // pEid->Octet[0] & 0x20;
pEdcaParm->bTxopRequest = FALSE; // pEid->Octet[0] & 0x40;
//pEdcaParm->bMoreDataAck = FALSE; // pEid->Octet[0] & 0x80;
pEdcaParm->EdcaUpdateCount = pEid->Octet[6] & 0x0f;
pEdcaParm->bAPSDCapable = (pEid->Octet[6] & 0x80) ? 1 : 0;
ptr = &pEid->Octet[8];
for (i=0; i<4; i++)
{
UCHAR aci = (*ptr & 0x60) >> 5; // b5~6 is AC INDEX
pEdcaParm->bACM[aci] = (((*ptr) & 0x10) == 0x10); // b5 is ACM
pEdcaParm->Aifsn[aci] = (*ptr) & 0x0f; // b0~3 is AIFSN
pEdcaParm->Cwmin[aci] = *(ptr+1) & 0x0f; // b0~4 is Cwmin
pEdcaParm->Cwmax[aci] = *(ptr+1) >> 4; // b5~8 is Cwmax
pEdcaParm->Txop[aci] = *(ptr+2) + 256 * (*(ptr+3)); // in unit of 32-us
ptr += 4; // point to next AC
}
}
// handle CCX IE
else
{
// 0. Check the size and CCX admin control
if (pAd->StaCfg.CCXControl.field.Enable == 0)
break;
if (pEid->Len != 5)
break;
// Turn CCX2 if matched
if (NdisEqualMemory(pEid->Octet, Ccx2IeInfo, 5) == 1)
pAd->StaCfg.CCXEnable = TRUE;
break;
}
break;
default:
DBGPRINT(RT_DEBUG_TRACE, ("PeerAssocRspSanity - ignore unrecognized EID = %d\n", pEid->Eid));
break;
}
Length = Length + 2 + pEid->Len;
pEid = (PEID_STRUCT)((UCHAR*)pEid + 2 + pEid->Len);
}
// Force CCX2 enable to TRUE for those AP didn't replay CCX v2 IE, we still force it to be on
if (pAd->StaCfg.CCXControl.field.Enable == 1)
pAd->StaCfg.CCXEnable = TRUE;
return TRUE;
}
/*
==========================================================================
Description:
MLME message sanity check
Return:
TRUE if all parameters are OK, FALSE otherwise
IRQL = DISPATCH_LEVEL
==========================================================================
*/
BOOLEAN PeerProbeReqSanity(
IN PRTMP_ADAPTER pAd,
IN VOID *Msg,
IN ULONG MsgLen,
OUT PUCHAR pAddr2,
OUT CHAR Ssid[],
OUT UCHAR *pSsidLen)
{
UCHAR Idx;
UCHAR RateLen;
CHAR IeType;
PFRAME_802_11 pFrame = (PFRAME_802_11)Msg;
COPY_MAC_ADDR(pAddr2, pFrame->Hdr.Addr2);
if ((pFrame->Octet[0] != IE_SSID) || (pFrame->Octet[1] > MAX_LEN_OF_SSID))
{
DBGPRINT(RT_DEBUG_TRACE, ("PeerProbeReqSanity fail - wrong SSID IE(Type=%d,Len=%d)\n",pFrame->Octet[0],pFrame->Octet[1]));
return FALSE;
}
*pSsidLen = pFrame->Octet[1];
NdisMoveMemory(Ssid, &pFrame->Octet[2], *pSsidLen);
Idx = *pSsidLen + 2;
// -- get supported rates from payload and advance the pointer
IeType = pFrame->Octet[Idx];
RateLen = pFrame->Octet[Idx + 1];
if (IeType != IE_SUPP_RATES)
{
DBGPRINT(RT_DEBUG_TRACE, ("PeerProbeReqSanity fail - wrong SupportRates IE(Type=%d,Len=%d)\n",pFrame->Octet[Idx],pFrame->Octet[Idx+1]));
return FALSE;
}
else
{
if ((pAd->CommonCfg.PhyMode == PHY_11G) && (RateLen < 8))
return (FALSE);
}
return TRUE;
}
/*
==========================================================================
Description:
IRQL = DISPATCH_LEVEL
==========================================================================
*/
BOOLEAN GetTimBit(
IN CHAR *Ptr,
IN USHORT Aid,
OUT UCHAR *TimLen,
OUT UCHAR *BcastFlag,
OUT UCHAR *DtimCount,
OUT UCHAR *DtimPeriod,
OUT UCHAR *MessageToMe)
{
UCHAR BitCntl, N1, N2, MyByte, MyBit;
CHAR *IdxPtr;
IdxPtr = Ptr;
IdxPtr ++;
*TimLen = *IdxPtr;
// get DTIM Count from TIM element
IdxPtr ++;
*DtimCount = *IdxPtr;
// get DTIM Period from TIM element
IdxPtr++;
*DtimPeriod = *IdxPtr;
// get Bitmap Control from TIM element
IdxPtr++;
BitCntl = *IdxPtr;
if ((*DtimCount == 0) && (BitCntl & 0x01))
*BcastFlag = TRUE;
else
*BcastFlag = FALSE;
// Parse Partial Virtual Bitmap from TIM element
N1 = BitCntl & 0xfe; // N1 is the first bitmap byte#
N2 = *TimLen - 4 + N1; // N2 is the last bitmap byte#
if ((Aid < (N1 << 3)) || (Aid >= ((N2 + 1) << 3)))
*MessageToMe = FALSE;
else
{
MyByte = (Aid >> 3) - N1; // my byte position in the bitmap byte-stream
MyBit = Aid % 16 - ((MyByte & 0x01)? 8:0);
IdxPtr += (MyByte + 1);
//if (*IdxPtr)
// DBGPRINT(RT_DEBUG_WARN, ("TIM bitmap = 0x%02x\n", *IdxPtr));
if (*IdxPtr & (0x01 << MyBit))
*MessageToMe = TRUE;
else
*MessageToMe = FALSE;
}
return TRUE;
}
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