Question Client/Server Application - Server Side not receiving data

Dhatsah

Member
Joined
Nov 18, 2012
Messages
5
Programming Experience
Beginner
Hi there,

I am trying to create a simple client/server application. Very basic - Client connects to server, client sends message to server - server receives message and broadcasts to any other connected clients.

As I say - it is supposed to be simple and for the purpose of self teaching better understanding.

As far as I can tell, the client is sending the data and I believe the difficulty is in the server receiving the data packets. Would anyone mind letting me know if there is something blindingly obviously wrong with my code.


Many thanks in advance.

Client

VB.NET:
Imports System.Net ' for IPAddress
Imports System.Net.Sockets 'for TcpListener
Imports System.Text


Module testClient
    ''' <summary>
    ''' CLIENT
    ''' </summary>
    ''' <remarks></remarks>
    Sub Main()
        Dim aString As String
        Dim port As Integer
        Dim localAddr As IPAddress
        Dim client As TcpClient
        Dim stream As NetworkStream
        Dim tempSocket
        Try
            port = 2302
            localAddr = IPAddress.Loopback
            Do
                Console.Write("are you ready to connect to your server? (y/n) ")
                aString = Console.ReadLine()


            Loop Until aString = "y" Or aString = "n"


            Do
                If aString = "y" Then
                    'Create a TcpClient.
                    client = New TcpClient(localAddr.ToString, port)
                    Console.Write(" Connencted to : " & IPAddress.Parse(CType(client.Client.LocalEndPoint, IPEndPoint).Address.ToString).ToString & " ")


                End If
                Console.Write("Ready to quit? (y/n)")
                aString = Console.ReadLine()
                If aString <> "y" Or aString <> "n" Then
                    'this is where we send a message to the server
                    Dim endPoint As New IPEndPoint(localAddr, port)
                    tempSocket = New Socket(endPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp)
                    tempSocket.Connect(endPoint)
                    stream = New NetworkStream(tempSocket)
                    Dim outStream As Byte() = Text.Encoding.ASCII.GetBytes(aString)
                    stream.Write(outStream, 0, outStream.Count)
                    stream.Flush()
                End If
            Loop Until aString = "y"
        Catch ex As Exception
            Console.Write(ex.ToString)
        End Try


    End Sub


End Module

Server:

VB.NET:
Imports System.Net
Imports System.Net.Sockets
Imports System.Text


Module testServer
    Dim port As Integer
    Dim localAddr As IPAddress
    Dim server As TcpListener
    Dim client As TcpClient
    Dim bytesFrom As Byte()
    ''' <summary>
    ''' Server
    ''' </summary>
    ''' <remarks></remarks>
    Dim tempSocket
    Sub Main()


        Try
            port = 2302
            localAddr = IPAddress.Loopback


            server = New TcpListener(localAddr, port)




            server.Start()
            Console.WriteLine("Server ready")


           
            client = server.AcceptTcpClient
            Console.WriteLine("Connected to " & IPAddress.Parse(CType(client.Client.LocalEndPoint, IPEndPoint).Address.ToString).ToString)


            getmessage()




        Catch ex As Exception
            Console.WriteLine(ex.ToString)
        End Try
    End Sub


    Sub getmessage()


        Dim endPoint As New IPEndPoint(localAddr, port)
        Dim clientSocket As New TcpClient
        Try


            clientSocket.Connect(endPoint)
            Dim Stream As NetworkStream = clientSocket.GetStream()
            Stream.Read(bytesFrom, 0, bytesFrom.Count)
            Dim dataFromClient As String = System.Text.Encoding.ASCII.GetString(bytesFrom)
            dataFromClient = dataFromClient.Substring(0, dataFromClient.IndexOf("$"))
            printOut(dataFromClient)
        Catch ex As Exception
            Console.WriteLine(ex.ToString)
        Finally
            clientSocket.Close()
        End Try


    End Sub
    Sub printOut(msg As String)
        Console.WriteLine(msg)
    End Sub


End Module
 
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