I'm writing an application that communicates to a piece of industrial hardware using UDP to collect information from the unit on the process.
The code looks good (analysed my ASCII strings to their custom software ASCII strings using WireShark and they match), but the only difference is that their program matches the server and client ports.
How can I modify my code to send from the same port number (example 8364) as the one I'm sending to?
The code is not complete, just using it for testing purposes..
Thanks!
The code looks good (analysed my ASCII strings to their custom software ASCII strings using WireShark and they match), but the only difference is that their program matches the server and client ports.
How can I modify my code to send from the same port number (example 8364) as the one I'm sending to?
VB.NET:
Imports System.Net
Imports System.Net.Sockets
Public Class Form2
Protected Shared Function UDPDataTransmit(ByVal sBuff() As Byte, ByRef rBuff() As Byte, ByVal IP As String, ByVal Port As Integer) As Integer
Dim UDP As New UdpClient
Dim retstat As Integer
Dim Sck As Socket
Dim Due As DateTime
Dim Encrp As IPEndPoint
Try
Sck = New Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp)
Sck.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 10000)
Sck.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, 10000)
Encrp = New IPEndPoint(IPAddress.Parse(IP), Port)
retstat = Sck.SendTo(sBuff, 0, sBuff.Length, SocketFlags.None, Encrp)
If retstat > 0 Then
'5 second time-out
Due = Now.AddMilliseconds(10000)
Do While Sck.Available = 0 AndAlso Now < Due
Loop
If Sck.Available = 0 Then
'Timed out
retstat = -3
Return retstat
End If
ReDim rBuff(Sck.Available - 1)
retstat = Sck.ReceiveFrom(rBuff, 0, Sck.Available, SocketFlags.None, CType(Encrp, EndPoint))
Else
'Fail on send
retstat = -1
End If
Catch ex As Exception
'General Exception received--add code here to analyze the exception. A messagebox would be one idea.
MsgBox(ex.Message)
retstat = -2
Finally
'Always close the socket when done.
Sck.Close()
End Try
Return retstat
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim SendCnt As Integer
Dim SendString As String
Dim SendData As Byte() = New Byte() {}
Dim RecData As Byte() = New Byte() {}
Dim IPAddress As String
Dim Port As Integer
Dim DecodeCnt As Integer
Dim DecodeLen As Integer
Dim DecodeAsciiCodeInt As String
Dim DecodeAsciiCode As String
Dim DecodedResponse As String
Dim BursterClearBuffer As String = Chr(4)
Dim BursterWakeUp As String = "00sr" & Chr(5)
Dim BursterInfo As String = Chr(2) & "0,1,INFO?" & Chr(3) & Chr(60) & "179" & Chr(62)
SendString = BursterInfo
SendData = System.Text.Encoding.ASCII.GetBytes(SendString)
IPAddress = "172.26.117.154"
Port = 8364
UDPDataTransmit(SendData, RecData, IPAddress, Port)
DecodeLen = RecData.Length
DecodedResponse = ""
For DecodeCnt = 0 To RecData.Length - 1
DecodeAsciiCodeInt = RecData(DecodeCnt)
Select Case DecodeAsciiCodeInt
Case "0"
DecodeAsciiCode = "<NULL>"
Case "1"
DecodeAsciiCode = "<SOH>"
Case "2"
DecodeAsciiCode = "<STX>"
Case "3"
DecodeAsciiCode = "<ETX>"
Case "4"
DecodeAsciiCode = "<EOT>"
Case "5"
DecodeAsciiCode = "<ENQ>"
Case "6"
DecodeAsciiCode = "<ACK>"
Case "7"
DecodeAsciiCode = "<BEL>"
Case "8"
DecodeAsciiCode = "<BS>"
Case "9"
DecodeAsciiCode = "<TAB>"
Case "10"
DecodeAsciiCode = "<LF>"
Case Else
DecodeAsciiCode = Chr(RecData(DecodeCnt))
End Select
DecodedResponse = DecodedResponse & DecodeAsciiCode
Next
ReturnTextBox.Text = DecodedResponse
End Sub
End ClassThe code is not complete, just using it for testing purposes..
Thanks!
