internal unsafe void ClearCache()
{
// Tell the driver to search for any new SSIDs
// and return them on the next OID_802_11_BSSID_LIST
// message.
uint dwBytesReturned = 0;
NDISUIO_QUERY_OID queryOID = new NDISUIO_QUERY_OID(0);
IntPtr ndisAccess;
bool retval;
// Attach to NDISUIO.
ndisAccess = FileEx.CreateFile(
NDISUIOPInvokes.NDISUIO_DEVICE_NAME,
FileAccess.All,
FileShare.None,
FileCreateDisposition.OpenExisting,
NDISUIOPInvokes.FILE_ATTRIBUTE_NORMAL | NDISUIOPInvokes.FILE_FLAG_OVERLAPPED);
if ((int)ndisAccess == FileEx.InvalidHandle)
{
// The operation failed. Leave us empty.
return;
}
// Send message to driver.
byte[] namestr = System.Text.Encoding.Unicode.GetBytes(adapter.Name + '\0');
fixed(byte *name = &namestr[0])
{
// Get Signal strength
queryOID.ptcDeviceName = name;
queryOID.Oid = NDISUIOPInvokes.OID_802_11_BSSID_LIST_SCAN; // 0x0D01011A
retval = NDISUIOPInvokes.DeviceIoControl(ndisAccess,
NDISUIOPInvokes.IOCTL_NDISUIO_SET_OID_VALUE, // 0x120814
queryOID,
queryOID.Size,
queryOID,
queryOID.Size,
ref dwBytesReturned,
IntPtr.Zero);
}
if (retval)
{
// The call went fine. There is no return
// data.
}
else
{
// There was an error.
int err = MarshalEx.GetLastWin32Error();
// ToDo: Additional error processing.
}
queryOID = null;
FileEx.CloseHandle(ndisAccess);
}
internal unsafe void RefreshList(Boolean clearCache)
{
// If we are to clear the driver's cache of SSID
// values, call the appropriate method.
//Console.WriteLine("Entering RefreshList");
if (clearCache)
{
this.ClearCache();
// This seems to be needed to avoid having
// a list of zero elements returned.
System.Threading.Thread.Sleep(1000);
}
this.List.Clear();
// Retrieve a list of NDIS_802_11_BSSID_LIST
// structures from the driver. We'll parse that
// list and populate ourselves based on the data
// that we find there.
uint dwBytesReturned = 0;
NDISUIO_QUERY_OID queryOID = new NDISUIO_QUERY_OID(6000 /* TESTING JFK was 2000 */);
IntPtr ndisAccess;
bool retval;
// Attach to NDISUIO.
ndisAccess = FileEx.CreateFile(
NDISUIOPInvokes.NDISUIO_DEVICE_NAME,
FileAccess.All,
FileShare.None,
FileCreateDisposition.OpenExisting,
NDISUIOPInvokes.FILE_ATTRIBUTE_NORMAL | NDISUIOPInvokes.FILE_FLAG_OVERLAPPED);
if ((int)ndisAccess == FileEx.InvalidHandle)
{
Console.WriteLine("Attach to NDISUIO Failed");
// The operation failed. Leave us empty.
return;
}
// Get Signal strength
byte[] namestr = System.Text.Encoding.Unicode.GetBytes(adapter.Name + '\0');
fixed(byte *name = &namestr[0])
{
// Get Signal strength
queryOID.ptcDeviceName = name;
queryOID.Oid = NDISUIOPInvokes.OID_802_11_BSSID_LIST; // 0x0D010217
retval = NDISUIOPInvokes.DeviceIoControl(ndisAccess,
NDISUIOPInvokes.IOCTL_NDISUIO_QUERY_OID_VALUE, // 0x00120804
queryOID,
queryOID.Size,
queryOID,
queryOID.Size,
ref dwBytesReturned,
IntPtr.Zero);
}
if (retval)
{
// Now we need to parse the incoming data into
// suitable representations of the SSIDs.
// Figure out how many SSIDs there are.
NDIS_802_11_BSSID_LIST rawlist = new NDIS_802_11_BSSID_LIST(queryOID.Data);
for (int i = 0; i < rawlist.NumberOfItems; i++)
{
// Get the next raw item from the list.
NDIS_WLAN_BSSID bssid = rawlist.Item(i);
// Using the raw item, create a cooked
// SSID item.
AccessPoint ssid = new AccessPoint(bssid);
// Add the new item to this.
this.List.Add(ssid);
}
}
else
{
// We might just need more room.
// For now, we just leave the list empty.
// ToDo: Additional error processing.
Console.WriteLine("ERROR Buffer Too Small"); //You'll notice here there should be some sort of error contol but there isn't.
//We simply don't have enough room.
}
}
