Re: chatting program

Tim,
I got this error when I run it. any idea why?
I opened port 9050 in the firewall, but I still got this error.


Unable to connect to server.
System.Net.Sockets.SocketException: No connection could be made because the
targ
et machine actively refused it
at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
at SimpleTcpClient.Main() in c:\documents and settings\brit\m
y documents\visual studio projects\consoleapplication5\class1.cs:line 60
Press any key to continue


"Tim Haughton" <timhaughton@xxxxxxxxx> wrote in message
news:Q4YTe.243218$Jd.125156@xxxxxxxxxxxxxxxxxxxxxxxxx
> using System;
> using System.Net;
> using System.Net.Sockets;
> using System.Text;
> class SimpleTcpSrvr
> {
> public static void Main()
> {
> int recv;
> byte[] data = new byte[1024];
> IPEndPoint ipep = new IPEndPoint(IPAddress.Any,
> 9050);
> Socket newsock = new
> Socket(AddressFamily.InterNetwork,
> SocketType.Stream, ProtocolType.Tcp);
> newsock.Bind(ipep);
> newsock.Listen(10);
> Console.WriteLine("Waiting for a client...");
> Socket client = newsock.Accept();
> IPEndPoint clientep =
> (IPEndPoint)client.RemoteEndPoint;
> Console.WriteLine("Connected with {0} at port {1}",
> clientep.Address, clientep.Port);
>
> string welcome = "Welcome to my test server";
> data = Encoding.ASCII.GetBytes(welcome);
> client.Send(data, data.Length,
> SocketFlags.None);
> while(true)
> {
> data = new byte[1024];
> recv = client.Receive(data);
> if (recv == 0)
> break;
>
> Console.WriteLine(
> Encoding.ASCII.GetString(data, 0, recv));
> client.Send(data, recv, SocketFlags.None);
> }
> Console.WriteLine("Disconnected from {0}",
> clientep.Address);
> client.Close();
> newsock.Close();
> }
> }class SimpleTcpClient
> {
> public static void Main()
> {
> byte[] data = new byte[1024];
> string input, stringData;
> IPEndPoint ipep = new IPEndPoint(
> IPAddress.Parse("127.0.0.1"), 9050);
> Socket server = new Socket(AddressFamily.InterNetwork,
> SocketType.Stream, ProtocolType.Tcp);
> try
> {
> server.Connect(ipep);
> } catch (SocketException e)
> {
> Console.WriteLine("Unable to connect to server.");
> Console.WriteLine(e.ToString());
> return;
> }
> int recv = server.Receive(data);
> stringData = Encoding.ASCII.GetString(data, 0, recv);
> Console.WriteLine(stringData);
> while(true)
> {
> input = Console.ReadLine();
> if (input == "exit")
> break;
> server.Send(Encoding.ASCII.GetBytes(input));
> data = new byte[1024];
> recv = server.Receive(data);
> stringData = Encoding.ASCII.GetString(data, 0, recv);
> Console.WriteLine(stringData);
> }
> Console.WriteLine("Disconnecting from server...");
> server.Shutdown(SocketShutdown.Both);
> server.Close();
> }
> }Lifted from "C# Network Programming" by Richard Blum. If it's useful to
> you, consider buying the book.-- Regards,Tim
> HaughtonAgitekhttp://agitek.co.ukhttp://blogitek.com/timhaughton
>
>


.

Relevant Pages

  • Re: chatting program
    ... IPEndPoint ipep = new IPEndPoint(IPAddress.Any, ... Socket client = newsock.Accept; ... recv = client.Receive; ... int recv = server.Receive; ...
    (microsoft.public.dotnet.languages.csharp)
  • Re: Synchronization with CAsyncSocket in CE 6.0
    ... number of bytes in the first packet, followed by packets of, say 1024 bytes. ... recv() operations, reassembling it into the format that you need. ... don't forget that recv can return zero, if the socket has ... So, CAsyncSocket while possibly a bad way to do things, does not appear to ...
    (microsoft.public.windowsce.embedded)
  • Re: Receive no data
    ... It is a best practice to shutdown ... a socket for sending once all data has been sent. ... I see multiple recv() statements in the code. ...
    (microsoft.public.win32.programmer.networks)
  • RE: BUG in Winsock on P4 HT CPU
    ... If you read the help on WSAAsyncSelect it states ... Network transport stack receives 100 bytes of data on socket s and causes ... The application issues recv(s, buffptr, 50, 0) to read 50 bytes. ... on CPU's that do not support HT, or CPUs with HT disabled. ...
    (microsoft.public.win32.programmer.networks)
  • Re: recv() hangs until SIGCHLD ?
    ... Both lsof and ls /proc//fd show that the socket used is in ESTABLISHED mode but when checking on the host on which it's connected we can't find the corresponding client socket. ... We are correctly handling EINTR in sendand recv() by restarting the call in case they get interrupted this way. ... However since this problem does not occur without threads, we can be sure that the blame is still on the receiver. ... In a practical case, we have a thread blocked in recvfor more than 12 hours, which is way beyond the timeout of the sender connection. ...
    (Linux-Kernel)
Loading