wifipeek.cpp

Wifi扫描器和自定义MFC控件 Wifi scanner + custom MFC controls 在WINCE环境下工作。

#include "WifiPeek.h"

//////////////////////////////////////////////////////////////////////////
CWifiPeek::CWifiPeek()
{
	m_hNDUIO=NULL;
	InitializeCriticalSection(&m_Lock);
	OpenDriver();
}

//////////////////////////////////////////////////////////////////////////
CWifiPeek::~CWifiPeek()
{
	if(m_hNDUIO != NULL)
	{
		CloseDriver();
	}
	DeleteCriticalSection(&m_Lock);
}

//////////////////////////////////////////////////////////////////////////
//get list of usable adapters
bool CWifiPeek::GetAdapters(LPWSTR pDest, DWORD &dwBufSizeBytes)
{
HANDLE hFile;
BYTE Buffer[2048];
void *pvBuf;
WCHAR TmpBuf[1024];
WCHAR *pszOut;
DWORD dwRet;
bool retval;

	if(pDest == NULL || dwBufSizeBytes < sizeof(WCHAR))
	{
		dwBufSizeBytes=0;
		return false;
	}

	EnterCriticalSection(&m_Lock);
	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)
	{
		pvBuf=(void *)(&Buffer[0]);
		dwRet=sizeof(Buffer);
		if(DeviceIoControl(hFile, IOCTL_NDIS_GET_ADAPTER_NAMES, NULL, 0, pvBuf, sizeof(Buffer), &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(pDest, TmpBuf, dwRet);
				retval=true;
			}
			//otherwise will return false
			//..
		}
		CloseHandle(hFile);
	}
	LeaveCriticalSection(&m_Lock);
	return retval;
}

//////////////////////////////////////////////////////////////////////////
//open the NDISUIO driver
bool CWifiPeek::OpenDriver()
{
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;
	}
}

//////////////////////////////////////////////////////////////////////////
//at the end, close NDISUIO handle
void CWifiPeek::CloseDriver()
{
	CloseHandle(m_hNDUIO);
	m_hNDUIO=NULL;
}

//////////////////////////////////////////////////////////////////////////
//initiate station scanning
bool CWifiPeek::RefreshBSSIDs(LPWSTR pAdapter)
{
NDISUIO_SET_OID nso;
DWORD dwBytesRet;
bool retval;

	EnterCriticalSection(&m_Lock);
	nso.ptcDeviceName = pAdapter;
	nso.Oid = OID_802_11_BSSID_LIST_SCAN;

	dwBytesRet=0;
	if(!DeviceIoControl(m_hNDUIO, IOCTL_NDISUIO_SET_OID_VALUE, (void *)&nso, sizeof(NDISUIO_SET_OID), NULL, 0, &dwBytesRet, NULL))
	{
		retval=false;
	}
	else
	{
		retval=true;
	}
	LeaveCriticalSection(&m_Lock);
	return retval;
}

//////////////////////////////////////////////////////////////////////////
//get a list of currently visible stations
bool CWifiPeek::GetBBSIDs(LPWSTR pAdapter, struct BSSIDInfo *pDest, DWORD &dwBufSizeBytes, DWORD &dwReturnedItems)
{
PNDISUIO_QUERY_OID pNQO;
DWORD dwBytesRet;
BYTE Buffer[8192], *pByte;
PNDIS_802_11_BSSID_LIST pList;
int i;

	if(pDest == NULL)
	{
		dwReturnedItems=0;
		return false;
	}

	EnterCriticalSection(&m_Lock);	
	pNQO=(PNDISUIO_QUERY_OID)Buffer;

	pNQO->ptcDeviceName = pAdapter;
	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))
	{
		GetLastError();
		LeaveCriticalSection(&m_Lock);
		return false;
	}

	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(pDest[i].BSSID, pItem->MacAddress, sizeof(pItem->MacAddress));
		mbstowcs(pDest[i].SSID, (char *)pItem->Ssid.Ssid, sizeof(pItem->Ssid.Ssid));
		pDest[i].RSSI=pItem->Rssi;
		if(pItem->Configuration.DSConfig > 14)
		{
			pDest[i].Channel=(pItem->Configuration.DSConfig - 2407000) / 5000;
		}
		else
		{
			pDest[i].Channel=pItem->Configuration.DSConfig;
		}
		pDest[i].Auth=pItem->Privacy;
		pDest[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

	LeaveCriticalSection(&m_Lock);
	return true;
}