public void FinDNS(DNSState state)
{
Log_Info("DNS Packet Sent From CLR_DEV9 DNS server");
DNS retPay = state.DNS;
string[] reqs = state.Questions;
ConcurrentDictionary <string, byte[]> answers = state.GetAnswers();
foreach (string req in reqs)
{
if (answers.ContainsKey(req))
{
DNSResponseEntry ans = new DNSResponseEntry(req, 1, 1, answers[req], 10800);
retPay.Answers.Add(ans);
}
else
{
//Log_Error("Missing an Answer");
retPay.RCode = 2; //ServerFailure
}
}
byte[] udpPayload = retPay.GetBytes();
if (udpPayload.Length > 512)
{
throw new NotImplementedException("DNS packet larger than 512bytes");
}
UDP retudp = new UDP(udpPayload);
retudp.SourcePort = 53;
retudp.DestinationPort = state.ClientPort;
_recvBuff.Enqueue(retudp);
//Interlocked.Decrement(ref open);
}
static void Main(string[] args)
{
Console.WriteLine("Sending");
//Create DNS Packet
DNS p = new DNS();
p.ID = 0;
p.OPCode = (byte)DNSOPCode.Query;
p.RD = true;
p.Questions.Add(new DNSQuestionEntry("www01.kddi-mmbb.jp", 1, 1));
DNS p2 = new DNS(p.GetBytes());
Console.WriteLine(); Console.WriteLine();
UdpClient udp = new UdpClient();
byte[] data = p.GetBytes();
udp.Send(data, data.Length, new IPEndPoint(new IPAddress(new byte[] { 173, 198, 207, 99 }), 53));
IPEndPoint retIP = new IPEndPoint(IPAddress.Any, 0);
Console.WriteLine("Waiting for response");
data = udp.Receive(ref retIP);
Console.WriteLine("Recived From " + retIP.Address.ToString());
p2 = new DNS(data);
if (p2.AnswerCount == 1 &&
(p2.Answers[0].Data[0] == 173 & p2.Answers[0].Data[1] == 198 & p2.Answers[0].Data[2] == 207 & p2.Answers[0].Data[3] == 99))
{
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Response Seems OK");
}
else
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("BAD Response");
}
udp.Close();
Console.ReadKey();
}
