private void BT_DNS_Click(object sender, EventArgs e)
{
BT_DNS.Enabled = false;
if (!IsValidIPAddress(TB_DNS_IP.Text))
{
MessageBox.Show("The IP adress you entered seems to be invalid. Please check it.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (!BGW_DNS.IsBusy)
{
TB_DNS_IP.Enabled = false;
BT_DNS.Text = "STOP DNS";
LB_DNS_Log.Items.Add(DateTime.Now.ToLongTimeString() + ": Sending command: Start DNS");
LB_DNS_Log.SelectedIndex = LB_DNS_Log.Items.Count - 1;
BGW_DNS.RunWorkerAsync(TB_DNS_IP.Text);
LA_DNS_Status.Text = "DNS running";
LA_DNS_Status.BackColor = Color.Green;
BT_DNS.Enabled = true;
}
else
{
BGW_DNS.ReportProgress(1, "Sending command: Stop DNS");
BGW_DNS.CancelAsync();
//if (dnsserv != null)
// dnsserv.Shutdown(SocketShutdown.Both);
//while (BGW_DNS.IsBusy)
//{
// Thread.Sleep(1000);
//}
//BT_DNS.Enabled = true;
}
}
private void BGW_DNS_DoWork(object sender, DoWorkEventArgs e)
{
string fake_ip = e.Argument.ToString();
if (!IsValidIPAddress(fake_ip))
{
return;
}
BGW_DNS.ReportProgress(1, "DNS started...");
Socket s;
Socket dnsserv = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
dnsserv.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1);
dnsserv.Bind(new IPEndPoint(IPAddress.Any, 53));
byte[] fake_ip_byte = new byte[4];
for (int i = 0; i <= 3; i++)
{
fake_ip_byte[i] = byte.Parse(fake_ip.Split('.')[i]);
}
byte[] r;
byte[] rr = new byte[512];
int lngSnd = 0;
int lngRcv = 0;
string str_r = null;
string str_rr = null;
string host = null;
EndPoint rem_ep = new IPEndPoint(IPAddress.Any, 0);
while (!BGW_DNS.CancellationPending)
{
try
{
r = new byte[511];
dnsserv.ReceiveTimeout = 5000;
lngRcv = dnsserv.ReceiveFrom(r, SocketFlags.None, ref rem_ep);
//BGW_DNS.ReportProgress(1, "Connected to: " + rem_ep.ToString());
//r = new byte[lngRcv];
Array.Resize(ref r, lngRcv + 1);
str_r = Encoding.ASCII.GetString(r, 0, lngRcv);
host = str_r.Substring(12, str_r.IndexOf('\0', 12) - 12);
string requestedHost = "";
int n = 0;
while (n < host.Length)
{
requestedHost += host.Substring(n + 1, r[n + 12]) + ".";
n += r[n + 12] + 1;
}
requestedHost = requestedHost.Substring(0, requestedHost.Length - 1);
rr = new byte[511];
s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
s.Connect("208.67.222.222", 53);
s.Send(r, lngRcv, SocketFlags.None);
lngSnd = s.Receive(rr, SocketFlags.None);
//rr = new byte[lngSnd];
Array.Resize(ref rr, lngSnd + 1);
if (requestedHost == "gamestats2.gs.nintendowifi.net")
{
Array.Copy(fake_ip_byte, 0, rr, 0x3c, 4);
BGW_DNS.ReportProgress(1, "Request (fake): " + requestedHost);
}
else
{
BGW_DNS.ReportProgress(1, "Request: " + requestedHost);
}
str_rr = Encoding.ASCII.GetString(rr, 0, lngSnd);
dnsserv.SendTo(rr, rr.Length, SocketFlags.None, rem_ep);
}
catch (SocketException ex)
{//ErrorCode 10060
if (ex.ErrorCode != 10060)
{
BGW_DNS.ReportProgress(1, "Error (" + ex.Message + ")");
}
}
catch (Exception ex)
{
BGW_DNS.ReportProgress(1, "Error (" + ex.Message + ")");
}
}
}
