I have a bunch of async methods that I want to expose via C# sockets. The general pattern in the MSDN documentaions Has the following form:
public static void StartListening()
{
...
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);
...
listener.BeginAccept(new AsyncCallback(AcceptCallback), listener);
...
}
public static void AcceptCallback(IAsyncResult ar)
{
...
handler.BeginReceive( state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
public static void ReadCallback(IAsyncResult ar)
{
...
StateObject state = (StateObject) ar.AsyncState;
...
CalculateResult(state);
...
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
...
}
So writing all this in a nice and clean form without repetition of code has been a challenge. I am thinking along these lines but have not been able to connect the dots:
public static void StartListeningMaster()
{
string ipAddress = "localhost";
IPHostEntry ipHost = Dns.GetHostEntry(ipAddress);
IPAddress address = ipHost.AddressList[0];
StartListening(50000, address, AcceptCallback1);
StartListening(50001, address, AcceptCallback2);
StartListening(50002, address, AcceptCallback3);
...
}
public static void StartListening(int port, IPAddress ipAddress,
Action<IAsyncResult> acceptCallback) {...}
public static void AcceptCallback1(IAsyncResult ar)
{
...
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize,
0, new AsyncCallback1(ReadCallback1), state);
}
...
This works fine up to this point. But to refactor it properly I would like to have one AcceptCallback method that takes as its parameter a generic ReadCallback that takes as its parameter a CalculateResult method. This way I would not have any repetition of code. However, if I modify my AcceptCallback method to take any more parameters than IAsyncResult (for example something like:
public static void StartListening(int port, IPAddress ipAddress, Action<IAsyncResult, Action<IAsyncResult>> acceptCallback) {...}
public static void AcceptCallback(IAsyncResult ar, Action<IAsyncResult> readCallback) {}
I break the AsyncCallback delegate contract.
public delegate void AsyncCallback(IAsyncResult ar);
Then I looked into extending the existing interfaces to allow the functionality. I looked into extending
public interface IAsyncResult
But that does not seem to be the right approach either. So, how do I write this code so I do not copy and paste pretty much the same code all over the place?
So the way I tackle this is by moving the basic components in to their own abstract objects. Then build upon those objects. For example, the server only needs to accept/track connections. So I would make a server object that looks something like this:
namespace MultiServerExample.Base
{
public interface IAsyncServerBase
{
void StartListening();
bool IsListening { get; }
void StopListening();
void WriteDataToAllClients(byte[] data);
}
public abstract class AsyncServerBase<TClientBase> : IAsyncServerBase
where TClientBase : IAsyncClientBase, new()
{
// implement a TcpListener to gain access to Active property
private sealed class ActiveTcpListener : TcpListener
{
public ActiveTcpListener(IPAddress localaddr, int port)
: base(localaddr, port) { }
public bool IsActive => Active;
}
// our listener object
private ActiveTcpListener Listener { get; }
// our clients
private ConcurrentDictionary<string, TClientBase> Clients { get; }
// construct with a port
public AsyncServerBase(int port)
{
Clients = new ConcurrentDictionary<string, TClientBase>();
Listener = new ActiveTcpListener(IPAddress.Any, port);
}
// virtual methods for client action
public virtual void OnClientConnected(TClientBase client) { }
public virtual void OnClientDisconnected(TClientBase client, Exception ex) { }
// start the server
public void StartListening()
{
if(!IsListening)
{
Listener.Start();
Listener.BeginAcceptTcpClient(OnAcceptedTcpClient, this);
}
}
// check if the server is running
public bool IsListening =>
Listener.IsActive;
// stop the server
public void StopListening()
{
if (IsListening)
{
Listener.Stop();
Parallel.ForEach(Clients, x => x.Value.DetachClient(null));
Clients.Clear();
}
}
// async callback for when a client wants to connect
private static void OnAcceptedTcpClient(IAsyncResult res)
{
var me = (AsyncServerBase<TClientBase>)res.AsyncState;
if (!me.IsListening) { return; }
try
{
TcpClient client = null;
try
{
client = me.Listener.EndAcceptTcpClient(res);
}
catch(Exception ex)
{
System.Diagnostics.Debug.WriteLine($"Warning: unable to accept client:\n{ex}");
}
if(client != null)
{
// create a new client
var t = new TClientBase();
// set up error callbacks
t.Error += me.OnClientBaseError;
// notify client we have attached
t.AttachClient(client);
// track the client
me.Clients[t.Id] = t;
// notify we have a new connection
me.OnClientConnected(t);
}
}
finally
{
// if we are still listening, wait for another connection
if(me.IsListening)
{
me.Listener.BeginAcceptSocket(OnAcceptedTcpClient, me);
}
}
}
// Event callback from a client that an error has occurred
private void OnClientBaseError(object sender, AsyncClientBaseErrorEventArgs e)
{
var client = (TClientBase)sender;
client.Error -= OnClientBaseError;
OnClientDisconnected(client, e.Exception);
client.DetachClient(e.Exception);
Clients.TryRemove(client.Id, out _);
}
// utility method to write data to all clients connected
public void WriteDataToAllClients(byte[] data)
{
Parallel.ForEach(Clients, x => x.Value.WriteData(data));
}
}
}
At this point all the basics of running a server have been accounted for. Now for the client that runs on the server:
namespace MultiServerExample.Base
{
public interface IAsyncClientBase
{
event EventHandler<AsyncClientBaseErrorEventArgs> Error;
void AttachClient(TcpClient client);
void WriteData(byte[] data);
void DetachClient(Exception ex);
string Id { get; }
}
public abstract class AsyncClientBase : IAsyncClientBase
{
protected virtual int ReceiveBufferSize { get; } = 1024;
private TcpClient Client { get; set; }
private byte[] ReceiveBuffer { get; set; }
public event EventHandler<AsyncClientBaseErrorEventArgs> Error;
public string Id { get; }
public AsyncClientBase()
{
Id = Guid.NewGuid().ToString();
}
public void AttachClient(TcpClient client)
{
if(ReceiveBuffer != null) { throw new InvalidOperationException(); }
ReceiveBuffer = new byte[ReceiveBufferSize];
Client = client;
try
{
Client.GetStream().
BeginRead(ReceiveBuffer, 0, ReceiveBufferSize, OnDataReceived, this);
OnAttachedToServer();
}
catch (Exception ex)
{
Error?.Invoke(this,
new AsyncClientBaseErrorEventArgs(ex, "BeginRead"));
}
}
public void DetachClient(Exception ex)
{
try
{
Client.Close();
OnDetachedFromServer(ex);
}
catch { /* intentionally swallow */ }
Client = null;
ReceiveBuffer = null;
}
public virtual void OnDataReceived(byte[] buffer) { }
public virtual void OnAttachedToServer() { }
public virtual void OnDetachedFromServer(Exception ex) { }
public void WriteData(byte[] data)
{
try
{
Client.GetStream().BeginWrite(data, 0, data.Length, OnDataWrote, this);
}
catch(Exception ex)
{
Error?.Invoke(this, new AsyncClientBaseErrorEventArgs(ex, "BeginWrite"));
}
}
private static void OnDataReceived(IAsyncResult iar)
{
var me = (AsyncClientBase)iar.AsyncState;
if(me.Client == null) { return; }
try
{
var bytesRead = me.Client.GetStream().EndRead(iar);
var buf = new byte[bytesRead];
Array.Copy(me.ReceiveBuffer, buf, bytesRead);
me.OnDataReceived(buf);
}
catch (Exception ex)
{
me.Error?.Invoke(me, new AsyncClientBaseErrorEventArgs(ex, "EndRead"));
}
}
private static void OnDataWrote(IAsyncResult iar)
{
var me = (AsyncClientBase)iar.AsyncState;
try
{
me.Client.GetStream().EndWrite(iar);
}
catch(Exception ex)
{
me.Error?.Invoke(me,
new AsyncClientBaseErrorEventArgs(ex, "EndWrite"));
}
}
}
}
Now all your base code is written. You don't need to change this in any way. You simply implement your own client and server to respond accordingly. For example, here is a basic server implementation:
public class MyServer : AsyncServerBase<MyClient>
{
public MyServer(int port) : base(port)
{
}
public override void OnClientConnected(MyClient client)
{
Console.WriteLine($"* MyClient connected with Id: {client.Id}");
base.OnClientConnected(client);
}
public override void OnClientDisconnected(MyClient client, Exception ex)
{
Console.WriteLine($"***** MyClient disconnected with Id: {client.Id} ({ex.Message})");
base.OnClientDisconnected(client, ex);
}
}
And here is a client that the server above uses for communication:
public class MyClient : AsyncClientBase
{
public override void OnAttachedToServer()
{
base.OnAttachedToServer();
Console.WriteLine($"{Id}: {GetType().Name} attached. Waiting for data...");
}
public override void OnDataReceived(byte[] buffer)
{
base.OnDataReceived(buffer);
Console.WriteLine($"{Id}: {GetType().Name} recieved {buffer.Length} bytes. Writing 5 bytes back.");
WriteData(new byte[] { 1, 2, 3, 4, 5 });
}
public override void OnDetachedFromServer(Exception ex)
{
base.OnDetachedFromServer(ex);
Console.WriteLine($"{Id}: {GetType().Name} detached.");
}
}
And to drive the point home, here is another client that simply would plug in to the same server implementation, but gives it different characteristics:
public class MyOtherClient : AsyncClientBase
{
public override void OnAttachedToServer()
{
base.OnAttachedToServer();
Console.WriteLine($"{Id}: {GetType().Name} attached. Writing 4 bytes back.");
WriteData(new byte[] { 1, 2, 3, 4 });
}
public override void OnDataReceived(byte[] buffer)
{
base.OnDataReceived(buffer);
Console.WriteLine($"{Id}: {GetType().Name} recieved {buffer.Length} bytes.");
}
public override void OnDetachedFromServer(Exception ex)
{
base.OnDetachedFromServer(ex);
Console.WriteLine($"{Id}: {GetType().Name} detached.");
}
}
As far as using this, here is a small test program that puts it through a stress-test:
class Program
{
static void Main(string[] args)
{
var servers = new IAsyncServerBase[]
{
new MyServer(50000),
new MyServer(50001),
new MyOtherServer(50002)
};
foreach (var s in servers)
{
s.StartListening();
}
RunTestUsingMyServer("1", 89, 50000);
RunTestUsingMyServer("2", 127, 50001);
RunTestUsingMyOtherServer("3", 88, 50002);
Console.Write("Press any key to exit... ");
Console.ReadKey(true);
foreach (var s in servers)
{
s.WriteDataToAllClients(new byte[] { 1, 2, 3, 4, 5 });
s.StopListening();
}
}
private static void RunTestUsingMyServer(string name, int clientCount, int port)
{
Parallel.For(0, clientCount, x =>
{
using (var t = new TcpClient())
{
t.Connect(IPAddress.Loopback, port);
t.GetStream().Write(new byte[] { 1, 2, 3, 4, 5 }, 0, 5);
t.GetStream().Read(new byte[512], 0, 512);
t.Close();
}
Console.WriteLine($"FINISHED PASS {name} #{x}");
});
}
private static void RunTestUsingMyOtherServer(string name, int clientCount, int port)
{
Parallel.For(0, clientCount, x =>
{
using (var t = new TcpClient())
{
t.Connect(IPAddress.Loopback, port);
t.GetStream().Read(new byte[512], 0, 512);
t.GetStream().Write(new byte[] { 1, 2, 3, 4, 5, 6 }, 0, 6);
t.Close();
}
Console.WriteLine($"FINISHED PASS {name} #{x}");
});
}
}
If interested, here is the full source code you can check out. Hopefully this gets you to where you want to be as it pertains to reusing code.
I don't know if this can help. You can define a state object with all the information related to every port:
public class StateObject
{
public string Name;
public Socket Listener;
public IPEndPoint LocalEndPoint;
//...
public StateObject(Socket listener, IPEndPoint endPoint, string name)
{
Listener = listener;
LocalEndPoint = endPoint;
Name = name;
}
}
Then, you can use it as you need:
public static void StartListeningMaster()
{
string ipAddress = "localhost";
IPHostEntry ipHost = Dns.GetHostEntry(ipAddress);
IPAddress address = ipHost.AddressList[0];
StartListening(50000, address, "Main port");
StartListening(50001, address, "Service port");
StartListening(50002, address, "Extra");
//...
}
public static void StartListening(int port, IPAddress ipAddress, string name = "")
{
//...
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, port);
//...
StateObject state = new StateObject(listener, localEndPoint);
listener.BeginAccept(AcceptCallback, state);
//...
}
public static void AcceptCallback(IAsyncResult ar)
{
StateObject state = (StateObject)ar.AsyncState;
//...
handler.BeginReceive(client.buffer, 0, StateObject.BufferSize,
0, new AsyncCallback(ReadCallback), state);
}
public static void ReadCallback(IAsyncResult ar)
{
StateObject state = (StateObject)ar.AsyncState;
// Always have the info related to every socket
Socket listener = state.Listener;
string address = state.LocalEndPoint.Address.ToString();
int port = state.LocalEndPoint.Port;
string name = state.Name;
//...
StateObject state = (StateObject)ar.AsyncState;
//...
CalculateResult(state);
//...
handler.BeginReceive(client.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
//...
}
The CalculateResult(state) method will have all the necessary info to do whatever. This way, you only have one StartListening(), one AcceptCallback() and one ReadCallback() for all the ports to manage.
I'm trying to make a reverse connection, but nothing happens
system only tries to connect infinitely
client code :
private static Socket _clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
public static TcpClient client;
private const int _PORT = 28562; //port
public static string connectTo = "example.ddns.net"; //addres
public static IPAddress ipaddress = null;
...
private static void ConnectToServer()
{
int attempts = 0;
bool IsValidIP = IPAddress.TryParse(connectTo, out ipaddress);
if (IsValidIP == false)
{
ipaddress = Dns.GetHostAddresses(connectTo)[0];
Console.WriteLine(Dns.GetHostAddresses(connectTo)[0]);
}
client = new TcpClient();
while (!_clientSocket.Connected)
{
try
{
attempts++;
Console.WriteLine("Connection attempt " + attempts);
_clientSocket.Connect(ipaddress, _PORT);
Thread.Sleep(100);
}
catch (SocketException)
{
Console.Clear();
}
}
Console.Clear();
Console.WriteLine("Connected");
}
What can I change to be able to connect?
My udp class is not receiving the updated value from the stream. Device sends data continuously and when any alarm activated it add the code in stream and sends the updated value but my class is not receiving the updated value unless I restart the program.
here is my UDPListener class.
public class
{
public static int PORT_NUMBER { get; set; }
public string IpAddress { get; set; }
private readonly UdpClient udp;
public event Action<object, EventArgs> msgChanged;
IAsyncResult ar_ = null;
public UDPListener(string ipaddr, int port)
{
IpAddress = ipaddr;
PORT_NUMBER = port;
udp = new UdpClient(PORT_NUMBER);
Start();
}
public void Start()
{
StartListening();
}
public void Stop()
{
try
{
udp.Close();
}
catch { /* not necessary */ }
}
private void StartListening()
{
ar_ = udp.BeginReceive(Receive, new object());
}
private void Receive(IAsyncResult ar)
{
try
{
Thread.Sleep(150);
IPEndPoint ip = new IPEndPoint(IPAddress.Parse(IpAddress), PORT_NUMBER);
byte[] bytes = udp.EndReceive(ar, ref ip);
string message = Encoding.ASCII.GetString(bytes);
//raise event..
if (message.StartsWith("S"))
if (msgChanged != null)
msgChanged(message, EventArgs.Empty);
}
catch (Exception ex)
{
Debug.WriteLine("Error in UDPListner..." + ex.Message);
}
finally
{
StartListening();
}
}
}
Now what is happening when the program starts it will receive data "S0000.." but when alarm raises data changes to "S8000..etc" but this class continuously receiving the same "S000.." data unless I restart the class.
When I run the udp listener in while loop its works perfectly fine, it receives the updated stream and changes when alarm goes off.
here is the code for while loop udp.
while (!StopRunning)
{
Thread.Sleep(150);
udp = new UdpClient(PORT_NUMBER, AddressFamily.InterNetwork);
var ep = default(IPEndPoint);
var data = udp.Receive(ref ep);
udp.Close();
string msg = Encoding.ASCII.GetString(data);
if (msgChanged != null)
msgChanged(msg, EventArgs.Empty);
}
But I cannot make use of while loop because I have to fit this program in window service.
The main difference in your UDPListener and while loop is that in loop you are creating udp variable each time you are connecting to the UDP:
udp = new UdpClient(PORT_NUMBER, AddressFamily.InterNetwork);
In Receive(IAsyncResult ar) you only connect with the same client, so you still have the same data.
I think that you can rewrite your class something like this:
private void StartListening()
{
udp = new UdpClient(PORT_NUMBER, AddressFamily.InterNetwork);
ar_ = udp.BeginReceive(Receive, new object());
}
Make sure that you're disposing the udp connection after receive with Close() method:
byte[] bytes = udp.EndReceive(ar, ref ip);
udp.Close();
I am attempting to connect multiple clients to a server and monitor their connection...
I am trying to get a better understanding of TcpListener and TcpClient while creating these programs.
I found my server code from another stackoverflow answer as I am looking to get a connection from multiple clients, I have edited it abit:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace socket_server
{
class connect
{
public class State
{
public Socket workSocket = null;
public const int bufferSize = 1024;
public byte[] buffer = new byte[bufferSize];
public StringBuilder sb = new StringBuilder();
}
public class Server
{
public static ManualResetEvent allDone = new ManualResetEvent(false);
private static IPEndPoint findMe()
{
IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
IPAddress ipAddress = ipHostInfo.AddressList[0];
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 5505);
return localEndPoint;
}
public static void start()
{
try
{
TcpListener listener = new TcpListener(findMe());
TcpClient client;
listener.Start();
Console.WriteLine("Server IP: {0}\n", findMe());
Console.WriteLine("Waiting for Connection...");
while (true)
{
client = listener.AcceptTcpClient();
ThreadPool.QueueUserWorkItem(threadProc, client);
}
Console.ReadKey();
} catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private static void threadProc(object obj)
{
try
{
var client = (TcpClient)obj;
} catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
}
}
}
You call this like connect.Server.start()
This is my current client code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace socket_client
{
class connect
{
public class State
{
public Socket workSocket = null;
public const int bufferSize = 256;
public byte[] buffer = new byte[bufferSize];
public StringBuilder sb = new StringBuilder();
}
public class Client
{
private const int port = 5505;
private static String response = String.Empty;
private static IPEndPoint findServer()
{
IPHostEntry ipHostInfo = Dns.Resolve("10.1.2.30");
IPAddress ipAddress = ipHostInfo.AddressList[0];
IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);
return remoteEP;
}
public static void start()
{
TcpClient client = new TcpClient();
Console.WriteLine("Server IP: {0}", findServer().ToString());
Console.WriteLine("Client IP: {0}\n", software.getIPAddress());
connect(client);
if (client.Connected)
Console.WriteLine("\nConnected to: {0}\n", findServer().ToString());
}
private static void connect(TcpClient client)
{
try
{
client.Connect(findServer());
} catch(Exception e)
{
Console.WriteLine("Attempting to connect to: {0}", findServer().ToString());
connect(client);
}
}
}
}
}
You call this like connect.Client.start();
My classes such as hardware and software simply just get system information.
I would like to know how to check if a connection is dropped and respond with a Console.WriteLine for both Client and Server.
Edit-
This is what I have working for checking to see if a client drops from the server:
...
private static void threadProc(object obj)
{
try
{
var client = (TcpClient)obj;
Byte[] bytes = new Byte[256];
string data = null;
try {
NetworkStream stream = client.GetStream();
int i;
while((i = stream.Read(bytes,0,bytes.Length)) != 0)
{
data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
Console.WriteLine(">{0}: {1}", ((IPEndPoint)client.Client.RemoteEndPoint).Address.ToString(), data);
}
} catch(Exception e)
{
Console.WriteLine(">>{0} Lost Connection...", ((IPEndPoint)client.Client.RemoteEndPoint).Address.ToString());
}
} catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
...
You will only be able to detect if a connection was closed when reading on the stream fails, since there is no event which would notify you.
You might raise your own event in the connection-handling class.
But for some reasons, it is possible, that a TCP-Connection drops without a pending Read()-call to fail.
So, there is no perfect method, like handling an event, which always notifies you, when the connection broke. So you have to implement some keep-alive mechanism. E.g. send a ping/pong every once in a while and wait for the answer. If there is no answer in a defined time, you can close the connection.
I'm making a game in C# and I want to display the progress (movements and so on) of opponent. So I send events in game via TCP protocol to opponent.
I've already tried my application on localhost and it works but when I try to use my external address in order to communicate over the internet I get the error below in class TcpInformer.Connect():
a connection attempt failed because the connected party did not properly respond after a
period of time, or established connection failed because connected host has failed to
respond (my external IP address):(port)
I thought the problem was that I was behind NAT. But I've already set up portforwarding for port 49731 on IP 10.0.0.1 and nothing changed.
My second guess was Windows firewall but even when I stopped the firewall my app didn't start working.
My code for connecting of the two PCs is:
TcpInformer peer;
TcpHost server;
public void PrepareConnection() // for server (host)
{
playerType = PlayerType.One;
server = new TcpHost(form, this);
server.Start("10.0.0.1", 49731);
}
public void PrepareConnection2() // for client
{
playerType = PlayerType.Two;
peer = new TcpInformer(form, this);
peer.Connect("MY EXTERNAL IP", 49731);
}
// classes TcpHost and TcpInformer
public interface ITcpCommunication
{
#region Operations (3)
void ReadData();
void SendData(byte[] message);
void SendData(byte[] message, int size);
#endregion Operations
}
public class TcpInformer : ITcpCommunication
{
#region Fields (9)
private NetworkStream con_ns;
private TcpClient con_server;
private bool connected;
private Fmain form;
private SecondPlayer player;
private int port;
private string server;
private string stringData;
#endregion Fields
#region Delegates and Events (1)
// Events (1)
public event SimulationEventHandler ReadEvent;
#endregion Delegates and Events
#region Constructors (1)
public TcpInformer(Fmain form, SecondPlayer player)
{
this.form = form;
connected = false;
this.player = player;
}
#endregion Constructors
#region Methods (6)
// Public Methods (5)
///
///
///
/// e.g., server = "127.0.0.1"
/// e.g., port = 9050
public void Connect(string server, int port)
{
this.port = port;
this.server = server;
connected = true;
try
{
con_server = new TcpClient(this.server, this.port);
}
catch (SocketException ex)
{
connected = false;
MessageBox.Show("Unable to connect to server" + ex.Message);
return;
}
con_ns = con_server.GetStream();
}
public void Disconnect()
{
form.Debug("Disconnecting from server...", "Player2Net");
con_ns.Close();
con_server.Close();
}
public void ReadData()
{
if (con_ns != null)
{
if (con_ns.DataAvailable)
{
byte[] data = new byte[1200];
int received = con_ns.Read(data, 0, data.Length);
player.ProcessReceivedData(data, received);
}
}
else
{
form.Debug("Warning: con_ns is not inicialized.","player2");
}
}
public void SendData(byte[] message)
{
con_ns.Write(message, 0, message.Length);
con_ns.Flush();
}
public void SendData(byte[] message, int size)
{
if (con_ns != null)
{
con_ns.Write(message, 0, size);
}
}
// Private Methods (1)
private void Debug(string message)
{
form.Debug("Connected to: " + server + "port: " + port.ToString() + ": " + message, "Player2Net");
}
#endregion Methods
}
public class TcpHost : ITcpCommunication
{
#region Fields (9)
private ASCIIEncoding enc;
private Fmain form;
private TcpListener listener;
private SecondPlayer player;
private int port;
private Socket s;
private string server;
private bool state;
#endregion Fields
#region Delegates and Events (1)
// Events (1)
public event SimulationEventHandler ReadEvent;
#endregion Delegates and Events
#region Constructors (1)
public TcpHost(Fmain form, SecondPlayer player)
{
this.player = player;
this.form = form;
state = false;
enc = new ASCIIEncoding();
}
#endregion Constructors
#region Methods (5)
// Public Methods (5)
public void Close()
{
state = false;
s.Close();
listener.Stop();
}
public void ReadData()
{
if (state == true)
{
if (s.Available > 0) // if there's any data
{
byte[] data = new byte[1200];
int received = s.Receive(data);
player.ProcessReceivedData(data, received);
}
}
}
public void SendData(byte[] message)
{
if (state == true)
{
s.Send(message);
}
}
public void SendData(byte[] message, int size)
{
if (state == true)
{
s.Send(message, size, SocketFlags.None);
}
}
public void Start(string p_ipAddress, int listenPort)
{
//IPAddress ipAddress = IPAddress.Loopback
IPAddress ipAddress = IPAddress.Parse(p_ipAddress);
IPEndPoint ipLocalEndPoint = new IPEndPoint(ipAddress, listenPort);
//listener = new TcpListener(ipAddress, listenPort);
listener = new TcpListener(ipLocalEndPoint);
server = "[provider]";
port = listenPort;
listener.Start();
form.Debug("Server is running", "Player1Net");
form.Debug("Listening on port " + listenPort, "Player1Net");
form.Debug("Waiting for connections...", "Player1Net");
s = listener.AcceptSocket();
form.Debug("Connection accepted from " + s.RemoteEndPoint, "Player1Net");
state = true;
}
#endregion Methods
}
Is there a way how to check what is wrong?
Help is much appreciated!
I found out what was the problem. I was listening on 10.0.0.1 and trying to reach my external IP (second instance of my program) which is impossible on a computer with one connection to the internet.
I also faced the same problem in AWS VPN.
I changed the proxy.company.com (external ip) to 10.0.0.5.
And it works now.