public static void AddToSynReceived(TcpSegment request)
{
Socket sender = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
sender.Bind(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 1111));
try
{
var response = new TcpSegment(Config.ServerListenPort, request.sourcePort, syn: true, ack: true);
sender.SendTo(response.ToByteArray(),
new IPEndPoint(IPAddress.Parse(Config.host), request.sourcePort));
SynRecived.Add(request.sourcePort);
Console.WriteLine($"{request.sourcePort} added to SynReceived");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
sender.Close();
}
if (SynRecived.Count > MaxSynRecived)
{
throw new Exception("SynReceived is overloaded");
}
}
public static void AddToConnected(TcpSegment request)
{
Established.Add(request.sourcePort);
SynRecived.Remove(request.sourcePort);
Console.WriteLine($"{request.sourcePort} added to Connected");
if (Established.Count > MaxEstablished)
{
throw new Exception("Connected is overloaded");
}
}
public static void Listener()
{
Console.WriteLine($"Сервер начал работу на {listenPoint.Address}:{listenPoint.Port}.");
try
{
listenSocket.Bind(listenPoint);
while (true)
{
byte[] data = new byte[1024];
int len = listenSocket.Receive(data);
TcpSegment message = TcpSegment.FromByteArray(TcpSegment.GetBytes(data, len));
if (message.destinationPort != Config.ServerListenPort)
{
continue;
}
else if (Established.Contains(message.sourcePort))
{
continue;
}
else if (SynRecived.Contains(message.sourcePort) && message.ack)
{
AddToConnected(message);
}
else if (!SynRecived.Contains(message.sourcePort) && message.syn)
{
AddToSynReceived(message);
}
}
}
catch (Exception ex)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine(ex.Message);
Console.ResetColor();
}
finally
{
listenSocket.Close();
}
}
private static void Run()
{
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
try
{
socket.Bind(new IPEndPoint(IPAddress.Parse(Config.host), 6660));
for (int i = 0; i < count; i++)
{
TcpSegment tcp = new TcpSegment(6661 + i, Config.ServerListenPort, syn: true);
socket.SendTo(tcp.ToByteArray(), server);
byte[] data = new byte[1024];
Socket socket1 = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
try
{
socket1.Bind(new IPEndPoint(IPAddress.Parse(Config.host), 6661 + i));
var count = socket1.Receive(data);
var msg = TcpSegment.FromByteArray(TcpSegment.GetBytes(data, count));
var re = new TcpSegment(msg.destinationPort, msg.sourcePort, ack: true);
socket1.SendTo(re.ToByteArray(), server);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
socket1.Close();
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
socket.Close();
}
}
private static void Run()
{
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
try
{
socket.Bind(new IPEndPoint(IPAddress.Parse(Config.host), 6661));
for (int i = 0; i < count; i++)
{
TcpSegment tcp = new TcpSegment(6661 + i, Config.ServerListenPort, syn: true);
socket.SendTo(tcp.ToByteArray(), new IPEndPoint(IPAddress.Parse(Config.host), Config.ServerListenPort));
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
socket.Close();
}
}
public static void Run()
{
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
try
{
TcpSegment tcp = new TcpSegment(6661, Config.ServerListenPort, syn: true);
socket.Bind(new IPEndPoint(IPAddress.Parse(Config.host), 6661));
for (int i = Config.ServerListenPort - 10; i <= Config.ServerListenPort; i++)
{
var point = new IPEndPoint(IPAddress.Parse(Config.host), Config.ServerListenPort);
tcp.destinationPort = i;
point.Port = i;
socket.SendTo(tcp.ToByteArray(), point);
}
socket.Close();
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket.Bind(new IPEndPoint(IPAddress.Parse(Config.host), 6661));
byte[] data = new byte[1024];
int len = socket.Receive(data);
var message = TcpSegment.FromByteArray(TcpSegment.GetBytes(data, len));
Console.WriteLine($"syn = {message.syn}, ack = {message.ack} on {message.sourcePort}.");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
socket.Close();
}
}
