//Listen incoming connections.
private void listenThread()
{
Socket serverSock = null;
try {
int recvNum;
byte[] data = new byte[10240];
IPEndPoint localIp = null;
foreach (IPAddress ipa in IpEntry.AddressList)
{
if (ipa.AddressFamily == AddressFamily.InterNetwork)
{
localIp = new IPEndPoint(ipa, bindPort);
break;
}
}
IPEndPoint serverEndPoint = new IPEndPoint(IPAddress.Parse(serverIP), serverPort);
if (MainWindow.activicePort.Contains(bindPort))
{
MessageBox.Show("Port has been used.");
throw new Exception();
}
serverSock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
serverSock.Bind(localIp);
Success = true;
MainWindow.activicePort.Add(bindPort);
sockets.Add(serverSock);
EndPoint server = serverEndPoint;
EndPoint remote = new IPEndPoint(IPAddress.Any, 0);
int port = 23000;
while (true)
{
ArrayList denies = dt.read();
if (port > 23500)
{
port = 23000;
}
recvNum = serverSock.ReceiveFrom(data, ref remote);
Lt.write("********************************");
Lt.write("Time: " + DateTime.Now.ToString());
Lt.write("Connect IP: " + (remote as IPEndPoint).Address.ToString());
Lt.write("Connect port: " + (remote as IPEndPoint).Port.ToString());
Lt.write("Destination Port: " + bindPort);
Lt.write("Protocol: UDP");
if (denies.Contains((remote as IPEndPoint).Address.ToString()))
{
Lt.write("Operation: Reject");
Lt.write("********************************");
Console.WriteLine("Message received from " + remote.ToString() + "\t reject.");
continue;
}
Lt.write("Operation: Accept");
Lt.write("********************************");
if (!remote.ToString().Equals(server.ToString()))
{
while (proxyTable.ContainsKey(port))
{
port++;
}
IPEndPoint IPRemote = remote as IPEndPoint;
string ip = IPRemote.Address.ToString();
int tarPort = IPRemote.Port;
proxyTable.Add(port, IPRemote);
Thread proxy = new Thread(proxyThread);
object[] param = new object[5] {
port, data, server, tarPort, recvNum
};
port++;
proxy.Start(param);
}
}
} catch (Exception ex) {
} finally {
if (serverSock != null)
{
serverSock.Close();
}
Success = false;
MainWindow.activicePort.Remove(bindPort);
stop();
}
}
