静态IP上的聊天服务器应用程序 [英] Chat- server Application on statice IP

问题描述

客户端应用程序代码

Imports System.Net.Sockets
Imports System.Net
Imports System.Text
Imports System.IO
Imports System.Drawing.Imaging
Imports System.Threading
Public Class Form1

    Private m_sock As Socket
    Private m_byBuff As Byte() = New Byte(36000) {}
    Dim byteDateLine As Byte()
    Dim data As IDataObject
    Private Sub frmWebCam_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Try
            If m_sock IsNot Nothing AndAlso m_sock.Connected Then
                m_sock.Shutdown(SocketShutdown.Both)
                System.Threading.Thread.Sleep(10)
                m_sock.Close()
            End If
            m_sock = New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
            Dim epServer As New IPEndPoint(IPAddress.Parse(txip.Text), 5502)
            m_sock.Blocking = False
            Dim onconnect__1 As New AsyncCallback(AddressOf OnConnect)
            m_sock.BeginConnect(epServer, onconnect__1, m_sock)
        Catch ex As Exception
        End Try
    End Sub
    Public Sub OnConnect(ByVal ar As IAsyncResult)
        Dim sock As Socket = DirectCast(ar.AsyncState, Socket)
        Try
            If sock.Connected Then
                SetupRecieveCallback(sock)
            Else
                MsgBox("Unable to connect to remote machine Connect Failed!")
            End If
        Catch ex As Exception
            MsgBox(ex.Message & "Unusual error during Connect!")
        End Try
    End Sub
    Public Sub OnRecievedData(ByVal ar As IAsyncResult)
        Dim sock As Socket = DirectCast(ar.AsyncState, Socket)
        Try
            Dim nBytesRec As Integer = sock.EndReceive(ar)
            If nBytesRec < 0 Then
                sock.Shutdown(SocketShutdown.Both)
                sock.Close()
            ElseIf nBytesRec > 0 Then
                Dim sRecieved As String = Encoding.ASCII.GetString(m_byBuff, 0, nBytesRec)
                MsgBox(sRecieved)
            End If

        Catch ex As Exception
        Finally
            SetupRecieveCallback(sock)
        End Try
    End Sub

    Public Sub SetupRecieveCallback(ByVal sock As Socket)
        Try
            Dim recieveData As New AsyncCallback(AddressOf OnRecievedData)
            sock.BeginReceive(m_byBuff, 0, m_byBuff.Length, SocketFlags.None, recieveData, sock)
        Catch ex As Exception
            ' MessageBox.Show(Me, ex.Message, "Setup Recieve Callback failed!")
        End Try
    End Sub
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim DateLine As [Byte]() = Encoding.ASCII.GetBytes(Environment.MachineName & " :- " & txport.Text.ToCharArray())
        m_sock.Send(DateLine, DateLine.Length, 0)
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Try
            If m_sock IsNot Nothing AndAlso m_sock.Connected Then
                m_sock.Shutdown(SocketShutdown.Both)
                System.Threading.Thread.Sleep(10)
                m_sock.Close()
            End If
            m_sock = New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
            Dim epServer As New IPEndPoint(IPAddress.Parse(txip.Text), 5502)
            m_sock.Blocking = False
            Dim onconnect__1 As New AsyncCallback(AddressOf OnConnect)
            m_sock.BeginConnect(epServer, onconnect__1, m_sock)
        Catch ex As Exception
        End Try
    End Sub
End Class

服务器端服务代码(静态IP)

server side service code( At static IP)

Imports System.Net.Sockets
Imports System.Net
Imports System.Threading

Public Class Service1
    Dim WithEvents atimer As New System.Timers.Timer(760)
    Public Shared m_aryClients As New ArrayList()
    Dim listener As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)

    Protected Overrides Sub OnStart(ByVal args() As String)
    End Sub
    Private Sub TIMTICK(ByVal o As Object, ByVal e As System.Timers.ElapsedEventArgs) Handles atimer.Elapsed
    End Sub
    Public Sub New()
        InitializeComponent()
        listener.Bind(New IPEndPoint(Dns.Resolve(System.Net.Dns.GetHostName).AddressList(0), 5502))
        listener.Listen(10)
        listener.BeginAccept(New AsyncCallback(AddressOf OnConnectRequest), listener)
        atimer.Start()
        atimer.Enabled = True
    End Sub

    Protected Overrides Sub OnStop()
        listener.Close()
    End Sub
    Public Sub OnConnectRequest(ByVal ar As IAsyncResult)
        Try
            Dim listener As Socket = DirectCast(ar.AsyncState, Socket)
            NewConnection(listener.EndAccept(ar))
            listener.BeginAccept(New AsyncCallback(AddressOf OnConnectRequest), listener)
        Catch ex As Exception

        End Try
    End Sub
    Public Sub NewConnection(ByVal sockClient As Socket)
        Try
            Dim client As New SocketChatClient(sockClient)
            m_aryClients.Add(client)
            client.SetupRecieveCallback(Me)

        Catch ex As Exception

        End Try
    End Sub
    Public Sub OnRecievedData(ByVal ar As IAsyncResult)
        Dim client As SocketChatClient = ar.AsyncState
        Dim aryRet = client.GetRecievedData(ar)
        Try
            If aryRet.Length < 1 Then
                client.Sock.Close()
                m_aryClients.Remove(client)
                Return
            Else
                For Each clientSend As SocketChatClient In m_aryClients
                    Try

                        clientSend.Sock.Send(aryRet, aryRet.Length, 0)
                    Catch
                        clientSend.Sock.Close()
                        m_aryClients.Remove(clientSend)
                    End Try
                Next
            End If
        Catch ex As Exception
        Finally
            client.SetupRecieveCallback(Me)
        End Try
    End Sub
    Friend Class SocketChatClient
        Private m_sock As Socket
        Private m_byBuff As Byte() = New Byte(36000) {}
        Public Sub New(ByVal sock As Socket)
            m_sock = sock
        End Sub
        Public ReadOnly Property Sock() As Socket
            Get
                Return m_sock
            End Get
        End Property
        Public Sub SetupRecieveCallback(ByVal app As Service1)
            Try
                Dim recieveData As New AsyncCallback(AddressOf app.OnRecievedData)
                m_sock.BeginReceive(m_byBuff, 0, m_byBuff.Length, SocketFlags.None, recieveData, Me)
            Catch ex As Exception
                Console.WriteLine("Recieve callback setup failed! {0}", ex.Message)
            End Try
        End Sub
        Public Function GetRecievedData(ByVal ar As IAsyncResult) As Byte()
            Dim nBytesRec As Integer = 0
            Try
                nBytesRec = m_sock.EndReceive(ar)
            Catch
            End Try
            Dim byReturn As Byte() = New Byte(nBytesRec - 1) {}
            Array.Copy(m_byBuff, byReturn, nBytesRec)
            Return byReturn
        End Function
    End Class
End Class

但是在服务器端，我有两个LAN卡，一个用于LAN，另一个用于WAN(静态IP)或Internet，因此我如何通过静态ip直接在WAN卡上进行通信.

在服务器上有两个局域网卡
一个IP地址为192.168.0.2
和
第二个IP地址为292.268.154.54(Airtel提供静态IP)

现在我想通过具有客户端代码exe和不同网络连接的两台不同的PC进行通信，因此在黑白连接上存在问题

请帮助我

but on server side i have two LAN Card one for LAN and other For WAN(Static IP) or internet so how can i communicate directly on WAN Card by static ip.

ON Server there two lan card
one has IP Address is 192.168.0.2
and
second has ip address is 292.268.154.54(Airtel Provide Static IP)

now i want to communicate by two different pc which has client code exe and different Network connection , so there is problem on connection b/w them

Please Help me

推荐答案

此函数将返回您计算机中IpV4地址的列表.

This function will return a list of IpV4 addresses in your machine.

Private Function GetLocalIpAddresses() As List(Of System.Net.IPAddress)
      Dim strHostName As String
      Dim addresses() As System.Net.IPAddress
      Dim retAddresses As New List(Of System.Net.IPAddress)

      strHostName = System.Net.Dns.GetHostName()
      addresses = System.Net.Dns.GetHostAddresses(strHostName)

      ' Find an IpV4 address
      For Each address As System.Net.IPAddress In addresses
          If address.ToString.Contains(".") then
              retAddresses.Add(address)
          End If
      Next

      ' No IpV4 address? Return the loopback address.
      If retAddresses.Count = 0 Then retAddresses.Add(System.Net.IPAddress.Loopback)

      Return retAddresses
  End Function

获得列表后，您只需确定要使用的列表即可.

您将替换

After you have the list, you just decide which one you want to use.

You would replace

listener.Bind(New IPEndPoint(Dns.Resolve(System.Net.Dns.GetHostName).AddressList(0), 5502))

像这样:

with something like:

Dim addresses As List(Of System.Net.IPAddress)
addresses = GetLocalIpAddresses()

' Lets say you know you want to use the first address...
listener.Bind(addresses.Item(0), 5502))

另外，您可以只使用我的客户端和服务器类通过tcp/ip进行通信. 此处.
.

希望这会有所帮助...如果这是您的答案，请单击绿色按钮.

-皮特

Also, you can just use my client and server classes to do communication over tcp/ip. Have a look at the project here.

Hope this helps... and if this is your answer, please hit the green button.

- Pete

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