How to create static ARP cache entries programatic

问题:

Is there are way to set ARP cache entry in C#?

The only way I have found is related to use of arp utility Address Resolution Protocol

Static entries added with the arp -s command are not expired from the cache.

There are related post about How do I access ARP-protocol information through .NET?

回答1:

It wouldn't be purely .NET obviously, but you should be able to do it via the Win32 API in the IP Helper API library - namely the CreateIpNetEntry and SetIpNetEntry methods. You would likely want to do this via P/Invoke or a wrapped managed C++ library.

http://msdn.microsoft.com/en-us/library/aa366071(v=vs.85).aspx

回答2:

The simple solution I am using right now is to run batch command that will add this static entry into ARP table. On Vista and up this will require administrator user rights.

' arp -s 192.168.1.12 01-02-03-04-05-06
Public Sub UpdateArpTable(IpAddress as string, MacAddress as string)
    Dim outputMessage As string = ""
    Dim errorMessage As string = ""
    Dim command As String = String.Format("-s {0} {1}", Address, MacAddress)
    ExecuteShellCommand("arp", command, outputMessage, errorMessage)
End Sub


Public Shared Sub ExecuteShellCommand(FileToExecute As String, CommandLine As String)
    Dim Process As System.Diagnostics.Process = Nothing
    Try
        Process = New System.Diagnostics.Process()
        Dim CMDProcess As String = String.Format("{0}\cmd.exe", Environment.SystemDirectory)

        Dim Arguments As String = String.Format("/C {0}", FileToExecute)

        If CommandLine IsNot Nothing AndAlso CommandLine.Length > 0 Then
            Arguments += String.Format(" {0}", CommandLine)
        End If
        Dim ProcessStartInfo As New System.Diagnostics.ProcessStartInfo(CMDProcess, Arguments)
        ProcessStartInfo.CreateNoWindow = True
        ProcessStartInfo.UseShellExecute = False
        ProcessStartInfo.RedirectStandardOutput = True
        ProcessStartInfo.RedirectStandardInput = True
        ProcessStartInfo.RedirectStandardError = True
        Process.StartInfo = ProcessStartInfo

        Process.Start()
        Process.WaitForExit()
        Process.WaitForExit()
    Finally
        ' close process and do cleanup
        Process.Close()
        Process.Dispose()
        Process = Nothing
    End Try
End Sub

回答3:

You can simply run the command ARP -s inet_addr eth_adr where inet_addr is the IP address and eth_adr is the hardware address.

  Process process = new Process();
  process.StartInfo.FileName = "arp -s 220.0.0.161 00-50-04-62-F7-23";
  process.StartInfo.CreateNoWindow = true; //Don't show window
  process.Start();