public async Task TestLookupWithGoogle(string domain, DnsQueryType type)
{
using var client = new DnsTcpClient(new NullLogger <DnsTcpClient>(), IPAddress.Parse("8.8.8.8"));
await client.RunQuery(domain, type);
}
private void buttonClientSend_Click(object sender, EventArgs e)
{
string errorMessage;
IPAddress serverAddr;
Cursor = Cursors.WaitCursor;
buttonClientSend.Enabled = false;
if (!ValidateServerText(textBoxClientServer.Text, out errorMessage))
{
errorProvider1.SetError(textBoxClientServer, errorMessage);
return;
}
try
{
// resolve server name by System.Net.Dns
serverAddr = System.Net.Dns.GetHostAddresses(textBoxClientServer.Text.Trim()).First();
}
catch (SocketException)
{
errorProvider1.SetError(textBoxClientServer, "Server name cannot be resolved.");
return;
}
try
{
IDnsClient client;
if (radioButtonClientTCP.Checked)
{
client = new DnsTcpClient();
}
else
{
client = new DnsUdpClient();
}
Request request = new Request(
(ushort)DateTime.Now.Ticks,
checkBoxClientRD.Checked,
(OPCODE)Enum.Parse(typeof(OPCODE), comboBoxClientOPCODE.SelectedValue.ToString()),
new Question(
textBoxClientQNAME.Text.Trim(),
(QTYPE)Enum.Parse(typeof(QTYPE), comboBoxClientQTYPE.SelectedValue.ToString()),
(QCLASS)Enum.Parse(typeof(QCLASS), comboBoxClientQCLASS.SelectedValue.ToString())));
labelClientResponse.Text = String.Empty;
textBoxClientResponse.Text = String.Empty;
client.Connect(serverAddr);
client.BeginProcess(request, new AsyncCallback(OnClientResponseReceived),
new ClientAsyncState {
Client = client, Request = request, Server = serverAddr
});
//try
//{
// client.Connect(serverAddr);
// DnsClient.Response response = client.LookUp(request);
// labelClientResponse.Text = String.Format("{0}: {1} from [{2}] in {3}ms",
// (response.Header.AA ? "Authoritative Response" : "Non-Authoritative Response"),
// response.Header.RCODE.ToString(),
// serverAddr.ToString(),
// response.Timestamp.Subtract(request.Timestamp).TotalMilliseconds);
// StringBuilder result = new StringBuilder();
// RenderResponse(response, result);
// textBoxClientResponse.Text = result.ToString();
//}
//finally
//{
// Cursor = Cursors.Default;
// buttonClientSend.Enabled = true;
//}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
public async Task TestLookupWithCloudFlare(string domain, DnsQueryType type)
{
using var client = new DnsTcpClient(new NullLogger <DnsTcpClient>(), IPAddress.Parse("1.1.1.1"));
await client.RunQuery(domain, type, type == DnsQueryType.ANY?DnsResponseCode.NotImp : DnsResponseCode.NoError);
}