c# - 如何在 Windows XP 中以编程方式创建静态 ARP 缓存条目

Question

有没有办法在 C# 中设置 ARP 缓存条目？

我发现的唯一方法与使用arp实用程序地址解析协议有关

使用arp -s命令添加的静态条目 不会从缓存中过期。

有关于如何通过 .NET 访问 ARP 协议信息的相关帖子？

Answer 1

显然它不会是纯粹的 .NET，但您应该能够通过 IP Helper API 库中的 Win32 API 来做到这一点 - 即 CreateIpNetEntry 和 SetIpNetEntry 方法。您可能希望通过 P/Invoke 或包装的托管 C++ 库来执行此操作。

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

Answer 2

我现在使用的简单解决方案是运行批处理命令，将这个静态条目添加到 ARP 表中。在 Vista 及更高版本上，这将需要管理员用户权限。

' 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

Answer 3

您可以简单地运行命令 ARP -s inet_addr eth_adr 其中 inet_addr 是 IP 地址，eth_adr 是硬件地址。

  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();

Answer 4

试试这个。（Zach 的学分）确保使用 try/catch 保护敏感部分

using System;
using System.Net;
using System.Runtime.InteropServices;

namespace CreateArpEntry
{
    class Program
    {
        [DllImport("iphlpapi.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.U4)]
        public static extern int CreateIpNetEntry(ref MIB_IPNETROW tableEntry);

        static void Main(string[] args)
        {
            IPAddress.TryParse("192.168.1.2", out IPAddress parsedIpAddress);
            byte[] macBytes = {0,0x0b,0x3b,0,0,1,0,0}; // pad the MAC address with zeros

            MIB_IPNETROW arpEntry = new MIB_IPNETROW
            {
                Index = 20,
                Addr = BitConverter.ToInt32(parsedIpAddress.GetAddressBytes(), 0),
                PhysAddr = macBytes,
                PhysAddrLen = 8,
                Type = 4, // it can only be static
            };

            int a = CreateIpNetEntry(ref arpEntry);
        }

    }

    [StructLayout(LayoutKind.Sequential)]
    public struct MIB_IPNETROW
    {
        /// <summary>
        /// The index of the adapter (Not constant may change for example by disable / enable  
        /// </summary>
        [MarshalAs(UnmanagedType.U4)]
        public int Index;

        /// <summary>
        /// The length of the physical address ( MAC Address) 
        /// </summary>
        [MarshalAs(UnmanagedType.U4)]
        public int PhysAddrLen;

        /// <summary>
        /// The physical / MAC Address
        /// </summary>
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
        public byte[] PhysAddr;

        /// <summary>
        /// The IP Address
        /// </summary>
        [MarshalAs(UnmanagedType.U4)]
        public int Addr;

        /// <summary>
        /// The IP Address Type
        /// Other = 1, Invalid = 2, Dynamic = 3, Static = 4 
        /// </summary>
        [MarshalAs(UnmanagedType.U4)]
        public int Type;
    }
}