private static Win32Error ParseArguments(string[] args, out string QueryName, out DNS_TYPE QueryType, out DNS_QUERY_OPTIONS QueryOptions, out string ServerIp)
{
int CurrentIndex = 0;
bool ArgContainsQueryName = false;
Win32Error Error = Win32Error.ERROR_INVALID_PARAMETER;
QueryType = DNS_TYPE.DNS_TYPE_A; // default type
QueryOptions = 0; // default query options
QueryName = string.Empty;
ServerIp = string.Empty;
while (CurrentIndex < args.Length)
{
// Query Name:
if (StringComparer.OrdinalIgnoreCase.Compare(args[CurrentIndex], "-q") == 0)
{
CurrentIndex++;
if (CurrentIndex < args.Length)
{
QueryName = args[CurrentIndex];
ArgContainsQueryName = true;
}
else
{
goto exit;
}
}
// Query Type
else if (StringComparer.OrdinalIgnoreCase.Compare(args[CurrentIndex], "-t") == 0)
{
CurrentIndex++;
if (CurrentIndex < args.Length)
{
QueryType = ExtractUserFriendlyQueryType(args[CurrentIndex]);
if (QueryType == 0)
{
goto exit;
}
}
else
{
goto exit;
}
}
// Query Options
else if (StringComparer.OrdinalIgnoreCase.Compare(args[CurrentIndex], "-o") == 0)
{
CurrentIndex++;
if (CurrentIndex < args.Length)
{
try { QueryOptions = ExtractUserFriendlyQueryOptions(args[CurrentIndex]); }
catch { goto exit; }
}
else
{
goto exit;
}
}
// Server List
else if (StringComparer.OrdinalIgnoreCase.Compare(args[CurrentIndex], "-s") == 0)
{
CurrentIndex++;
if (CurrentIndex < args.Length)
{
ServerIp = args[CurrentIndex];
}
else
{
goto exit;
}
}
else
{
goto exit;
}
CurrentIndex++;
}
if (ArgContainsQueryName)
{
Error = Win32Error.ERROR_SUCCESS;
}
exit:
if (Error.Failed)
{
PrintHelp();
}
return(Error);
}
internal static extern int DnsQuery_W([MarshalAs(UnmanagedType.LPWStr)] string pszName, DNS_TYPE wType, QueryOptions Options, IP4_ARRAY aipServers, ref IntPtr ppQueryResults, IntPtr pReserved);
private static extern int DnsQuery_W(string pszName, DNS_TYPE wType, DNS_QUERY options, IntPtr pExtra, out IntPtr ppQueryResults, IntPtr pReserved);
