// WinNT only. Win9x this code will not work.
private static IntPtr OpenHandle(String path)
{
String fullPath = Path.GetFullPathInternal(path);
String root = Path.GetPathRoot(fullPath);
if (root == fullPath && root[1] == Path.VolumeSeparatorChar)
{
throw new ArgumentException(Environment.GetResourceString("Arg_PathIsVolume"));
}
new FileIOPermission(FileIOPermissionAccess.Write, new String[] { fullPath + "\\." }, false, false).Demand();
IntPtr handle = Win32Native.CreateFile(
fullPath,
GENERIC_WRITE,
FILE_SHARE_WRITE | FILE_SHARE_DELETE,
Win32Native.NULL,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS,
Win32Native.NULL
);
if (handle == Win32Native.INVALID_HANDLE_VALUE)
{
int hr = Marshal.GetLastWin32Error();
__Error.WinIOError(hr, path);
}
return(handle);
}
public static FileStream Open(string path, FileMode mode, FileAccess access)
{
SafeFileHandle handle = Win32Native.CreateFile(String.Concat(@"\\?\", path), (int)0x10000000, FileShare.None, null, mode, (int)0x00000080, IntPtr.Zero);
if (handle.IsInvalid)
{
throw new System.ComponentModel.Win32Exception();
}
return(new FileStream(handle, access));
}
public static FileStream OpenForOnlyRead(string path)
{
path = GetUNCPath(path);
SafeFileHandle handle = Win32Native.CreateFile(path, (uint)0x80000000, FileShare.Read, null, FileMode.Open, (int)0x00000080, IntPtr.Zero);
if (handle.IsInvalid)
{
throw new System.ComponentModel.Win32Exception();
}
return(new FileStream(handle, FileAccess.Read));
}
public static bool CreateFile(string path)
{
SafeFileHandle handle = Win32Native.CreateFile(String.Concat(@"\\?\", path), (int)0x10000000, FileShare.None, null, FileMode.Create, (int)0x00000080, IntPtr.Zero);
if (handle.IsInvalid)
{
return(false);
}
return(true);
}
public static bool CreateFile(string path)
{
path = GetUNCPath(path);
SafeFileHandle handle = Win32Native.CreateFile(path, (int)0x10000000, FileShare.None, null, FileMode.Create, (int)0x00000080, IntPtr.Zero);
if (handle.IsInvalid)
{
return(false);
}
return(true);
}
public SharpTap(TapProfile Profile)
{
this.Profile = Profile;
if (!this.Profile.IsInstalled)
{
throw new Exception("Tuntap driver not installed");
}
mTapHandle = Win32Native.CreateFile(this.Profile.UsermodeDeviceSpace + this.Profile.DeviceGUID + ".tap", FileAccess.ReadWrite,
FileShare.ReadWrite, 0, FileMode.Open, 0x4 | 0x40000000, IntPtr.Zero); // FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED 0x40000000 |FILE_FLAG_WRITE_THROUGH 0x80000000
// rewrite a filestream for async read write with overlap, seprate read write buffer size
//TapDriver = new FileStream(new SafeFileHandle(mTapHandle, true), FileAccess.ReadWrite, 0xFFFF, true);
TapDriver = new TapStream(mTapHandle);
//string path = this.Profile.UsermodeDeviceSpace + this.Profile.DeviceGUID + ".tap";
//TapDriver = new FileStream(path, FileMode.Open, FileAccess.ReadWrite, FileShare.None, 8, FileOptions.WriteThrough);
}
