Wifi signal strength.

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From: jp2msft on 20 Aug 2008 09:30

---

Same question, but for VB or C#?

(I often read these newsgroups to catch How-To ideas, and I'd been wanting
to do this for a while)

"Chris Tacke, MVP" wrote:

> Using what programming language?
>
>
> --
>
> Chris Tacke, Embedded MVP
> OpenNETCF Consulting
> Giving back to the embedded community
> http://community.OpenNETCF.com
>
> "Skiler" <sklyar.andriy(a)gmail.com> wrote in message
> news:360beca3-7d24-4c37-8760-82e77ff6745a(a)z11g2000prl.googlegroups.com...
> >H all,
> > I need to find WiFicard on my PocketPC on WM 5/6 and then to measure
> > WIFI signal strength.
> > Can smb provide me some help???
> > Thanks a lot!
>

From: Skiler on 27 Aug 2008 09:16

---

I've resolved this issue.
This peace of code is for people who have the same issue =))

Thanks all for replies.....


HANDLE hDev;

//already opened?
if(m_hNDUIO != NULL)
{
return true;
}

hDev=CreateFile(NDISUIO_DEVICE_NAME, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, INVALID_HANDLE_VALUE);
if(hDev == INVALID_HANDLE_VALUE)
{
return false;
}
else
{
m_hNDUIO=hDev;
//return true;
}

HANDLE hFile;
BYTE Buffer1[2048];
void *pvBuf;
WCHAR TmpBuf[1024];
WCHAR *pszOut;
DWORD dwRet;
bool retval;
WCHAR pAdapterName[1024];
DWORD dwBufSizeBytes = 1024;

if(pAdapterName == NULL || dwBufSizeBytes < sizeof(WCHAR))
{
GxPrintf(eGxDebugLog, "ASL: pAdapterName == NULL || dwBufSizeBytes <
sizeof(WCHAR)\n");
dwBufSizeBytes=0;
return false;
}

retval=false;
//open NDIS driver
hFile=CreateFile(L"NDS0:", GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, INVALID_HANDLE_VALUE);
if(hFile != INVALID_HANDLE_VALUE)
{
GxPrintf(eGxDebugLog, "ASL: CreateFile - success\n");
pvBuf=(void *)(&Buffer1[0]);
dwRet=sizeof(Buffer1);
if(DeviceIoControl(hFile, IOCTL_NDIS_GET_ADAPTER_NAMES, NULL, 0,
pvBuf, sizeof(Buffer1), &dwRet, NULL))
{
//adapter list ok.
LPWSTR pszStr;
dwRet=0;
pszOut=TmpBuf;

//no string classes used, so no MFC or ATL dependency.
for(pszStr=(LPWSTR)pvBuf; *pszStr; pszStr+=wcslen(pszStr)+1)
{
//check if adapter name is ok, skip infrared, gprs, ActiveSync
etc.
if(wcsicmp(pszStr, L"ASYNCMAC1") && \
wcsicmp(pszStr, L"IRSIR1") && \
wcsicmp(pszStr, L"L2TP1") && \
wcsicmp(pszStr, L"PPTP1") && \
wcsicmp(pszStr, L"RNDISFN1") && \
wcsicmp(pszStr, L"WWAN1") && \
wcsicmp(pszStr, L"XSC1_IRDA1"))
{
//not the first adapter?
if(pszOut != TmpBuf)
{
//append separator
wcscat(pszOut, L",");
pszOut++;
dwRet+=sizeof(WCHAR);
}
wcscpy(pszOut, pszStr);
pszOut+=wcslen(pszStr);
dwRet+=sizeof(WCHAR) * wcslen(pszStr);
}
}
//return required buffer size anyway
dwBufSizeBytes=dwRet;

//if buffer large enough, copy adapter names
if(dwBufSizeBytes >= dwRet)
{
wcsncpy(pAdapterName, TmpBuf, dwRet);
retval=true;
}
//otherwise will return false
//..
}
}

BSSIDInfo pBSSIDInfo[128];
dwBufSizeBytes=sizeof(pBSSIDInfo);
DWORD dwReturnedItems = 0;

PNDISUIO_QUERY_OID pNQO;
DWORD dwBytesRet;
BYTE Buffer2[8192], *pByte;
PNDIS_802_11_BSSID_LIST pList;
int i;

if(pBSSIDInfo == NULL)
{
GxPrintf(eGxDebugLog, "ASL: pBSSIDInfo == NULL\n");
dwReturnedItems=0;
return false;
}

pNQO=(PNDISUIO_QUERY_OID)Buffer2;

pNQO->ptcDeviceName = pAdapterName;
pNQO->Oid=OID_802_11_BSSID_LIST;

// Run query
dwBytesRet = 0;
if(!DeviceIoControl(m_hNDUIO, IOCTL_NDISUIO_QUERY_OID_VALUE, (void
*)pNQO, 8192, (void *)pNQO, 8192, &dwBytesRet, NULL))
{
return false;
}
else
{
pList=(PNDIS_802_11_BSSID_LIST)&pNQO->Data;
dwReturnedItems=pList->NumberOfItems;
//first item in array
PNDIS_WLAN_BSSID pItem=pList->Bssid;

for(i=0; i<pList->NumberOfItems; i++)
{
memcpy(pBSSIDInfo[i].BSSID, pItem->MacAddress, sizeof(pItem-
>MacAddress));
mbstowcs(pBSSIDInfo[i].SSID, (char *)pItem->Ssid.Ssid, sizeof(pItem-
>Ssid.Ssid));
pBSSIDInfo[i].RSSI=pItem->Rssi;
if(pItem->Configuration.DSConfig > 14)
{
pBSSIDInfo[i].Channel=(pItem->Configuration.DSConfig - 2407000) /
5000;
}
else
{
pBSSIDInfo[i].Channel=pItem->Configuration.DSConfig;
}
pBSSIDInfo[i].Auth=pItem->Privacy;
pBSSIDInfo[i].Infastructure=pItem->InfrastructureMode;
//some pointer magic...actually pItem->Length was not
sizeof(NDIS_WLAN_BSSID)
//so use returned length
pByte=(BYTE *)pItem;
pByte+=pItem->Length;
pItem=(PNDIS_WLAN_BSSID)pByte;
}//for
}

CloseHandle(m_hNDUIO);
m_hNDUIO=NULL;


return retval;

From: jp2msft on 28 Aug 2008 09:32

---

Thanks Skiler! I'm studying that now.

"Skiler" wrote:
> This peace of code is for people who have the same issue =))

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