private static Native.Native.LdapControl ToLdapControl(DirectoryControl sourceCtrl)
{
var ctrl = new Native.Native.LdapControl
{
// Get the control type.
ldctl_oid = Encoder.Instance.StringToPtr(sourceCtrl.Type),
// Get the control cricality.
ldctl_iscritical = sourceCtrl.IsCritical
};
// Get the control value.
var byteControlValue = sourceCtrl.GetValue();
if (byteControlValue == null || byteControlValue.Length == 0)
{
// Treat the control value as null.
ctrl.ldctl_value = new Native.Native.berval
{
bv_len = 0,
bv_val = IntPtr.Zero
};
}
else
{
ctrl.ldctl_value = new Native.Native.berval
{
bv_len = byteControlValue.Length,
bv_val = Marshal.AllocHGlobal(byteControlValue.Length)
};
Marshal.Copy(byteControlValue, 0, ctrl.ldctl_value.bv_val, ctrl.ldctl_value.bv_len);
}
return(ctrl);
}
private static void FreeManagedControl(Native.Native.LdapControl ctrl)
{
if (ctrl.ldctl_oid != IntPtr.Zero)
{
Marshal.FreeHGlobal(ctrl.ldctl_oid);
}
if (ctrl.ldctl_value != null && ctrl.ldctl_value.bv_val != IntPtr.Zero)
{
Marshal.FreeHGlobal(ctrl.ldctl_value.bv_val);
}
}
