public string GetDnsServer(string domain)
{
string Dns = string.Empty;
try
{
IPAddress DefaultDns = GetDefaultDns();
if (DefaultDns == null)
return string.Empty;
Dig dig = new Dig();
dig.resolver.TransportType = Heijden.DNS.TransportType.Tcp;
Heijden.DNS.Response Response = dig.resolver.Query(domain, Heijden.DNS.QType.NS, Heijden.DNS.QClass.IN);
if (Response != null)
{
if (Response.header.RCODE == Heijden.DNS.RCode.NoError)
{
if (Response.Answers.Count > 0)
Dns = Response.Answers[0].RECORD.ToString().TrimEnd('.');
if (Response.Authorities.Count > 0)
{
//Dns = Response.Authorities[0].RECORD.ToString().Substring(0, Response.Authorities[0].RECORD.ToString().LastIndexOf('.'));
Dns = Response.Authorities[0].RECORD.ToString().Substring(0, Response.Authorities[0].RECORD.ToString().IndexOf(' ')).TrimEnd('.');
}
}
}
}
catch (Exception)
{
Console.WriteLine("DNSServer konnte nicht gefunden werden.(DNSValidator/GetDNSServer)");
}
return Dns;
}
public MainForm()
{
InitializeComponent();
SetupComboBox(typeof(QType), this.comboBox1);
SetupComboBox(typeof(QClass), this.comboBox2);
dig = new Dig();
list = new List <QuerySet>();
QuerySetIndex = -1;
this.checkBox1.Checked = dig.resolver.Recursion;
this.checkBox3.Checked = dig.resolver.UseCache;
this.textBox2.Text = dig.resolver.DnsServers[0].Address.ToString();
this.textBoxAttempts.Text = dig.resolver.Retries.ToString();
this.textBoxTimeout.Text = dig.resolver.TimeOut.ToString();
Console.SetOut(new FeedbackWriter(this.textBox1));
}
private bool ValidateDomain(string domain)
{
try
{
//IPAddress dnsServer = null;
//IPAddress[] dnsAddresses = Dns.GetHostAddresses(dNSServer);
//if (dnsAddresses.Length > 0)
// dnsServer = dnsAddresses[0];
Dig dig = new Dig();
dig.resolver.DnsServer = dNSServer;
dig.resolver.TimeOut = 500;
dig.resolver.TransportType = Heijden.DNS.TransportType.Tcp;
Heijden.DNS.Response Response = dig.resolver.Query(domain, Heijden.DNS.QType.A, Heijden.DNS.QClass.IN);
if (Response != null)
if (Response.header.RCODE == Heijden.DNS.RCode.NoError && Response.RecordsA.Length > 0)
return true;
}
catch (Exception)
{
Console.WriteLine("DNSServer konnte nicht bestätigt werden (DnsValidator/ValidateDomain) k");
}
return false;
}
