以编程方式添加路线 [英] Programmatically add route

问题描述

我写了一个简单的实用程序，为特定接口添加了路由。代码很简单：

I write a simple utility that adds a route for specific interface. Code is very simple:

using System;
using System.Diagnostics;
using System.Net.NetworkInformation;
using System.Text;

class Program
{
    static void Main(string[] args)
    {
        const string firstConnection = "xxxx.yyyyy";
        const string routeAddMask = "route add XX.XX.XX.XX mask 255.255.255.255 XXX.XXX.XXX.XXX METRIC 99 IF {0}";
        StartProcess("rasdial", firstConnection);
        var interfaceId = GetInterfaceId(firstConnection);
        string routeAdd = string.Format(routeAddMask, interfaceId);
        StartProcess("route", routeAdd);
    }

    private static int GetInterfaceId(string name)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        var adapter = Array.Find(adapters, ni => ni.Name == name);
        var props = adapter.GetIPProperties().GetIPv4Properties();
        return props.Index;
    }

    private static void StartProcess(string name, string args)
    {
        var process = new Process
                   {
                       StartInfo = new ProcessStartInfo(name, args)
                                   {
                                       UseShellExecute = false,
                                       RedirectStandardOutput = true,
                                       StandardOutputEncoding = Encoding.ASCII
                                   }
                   };
        process.Start();
        while (!process.HasExited)
        {
            Console.WriteLine(process.StandardOutput.ReadToEnd());
        }
        process.WaitForExit();
        Console.WriteLine("Process {0} finished, exit code = {1}", name, process.ExitCode);
    }
}

rasdial 正常工作，我得到接口号，但是当我运行 route 时出现错误：

rasdial works fine and I get interface number, but when I'm running route I get an error:

无效的MASK会产生错误，即（DEST& MASK）！= DEST。

Invalid MASK generates an error, that is when (DEST & MASK) != DEST.

我认为问题是未通过进程启动args，因为在发送 null 而不是 routeAdd 参数时遇到了相同的错误同时，当我在cmd中提示该命令时，此命令运行正常。

I think problem is that process start args are not passed because I get the same error while sending null instead of routeAdd parameter meanwhile this command works fine when i'm prompting it in cmd.

可执行文件以管理员身份运行。

Executable is running as Administrator.

我正在尝试使用winapi创建它，但是它也失败了

I'm trying to create it with winapi, but it fails too

const string firstConnection = "someconnect";
StartProcess("rasdial", firstConnection);
var interfaceIndex = GetInterfaceIndex(firstConnection); //Everything is fine

var route = new MIB_IPFORWARDROW
            {
                dwForwardDest = BitConverter.ToUInt32(IPAddress.Parse("XX.XX.XX.XX").GetAddressBytes(), 0),
                dwForwardMask = BitConverter.ToUInt32(IPAddress.Parse("255.255.255.255").GetAddressBytes(), 0),
                dwForwardNextHop = BitConverter.ToUInt32(IPAddress.Parse("XXX.XXX.XXX.XXX").GetAddressBytes(), 0),
                dwForwardMetric1 = 99,
                dwForwardIfIndex = interfaceIndex
            };
var ipForwardEntry = RouteInterop.CreateIpForwardEntry(ref route);
Console.WriteLine(ipForwardEntry);

返回 ERROR_INVALID_PARAMETER

推荐答案

我知道这个问题不是很复杂，但是我在互联网上没有遇到任何解释，这就是为什么我认为这个答案会有所帮助这就是为什么我写它而不是删除我的最初问题。

I know that question is not very complex, but I didn't encounter any explanation in the internet, this is why I think this answer would be helpful and this is why I'm writing it instead of deleting my initial question.

您只需指定更多参数以使其起作用

You just should specify more parameters to make it work

    var route = new MIB_IPFORWARDROW
                {
                    dwForwardDest = BitConverter.ToUInt32(IPAddress.Parse("XX.XX.XX.XX").GetAddressBytes(), 0),
                    dwForwardMask = BitConverter.ToUInt32(IPAddress.Parse("255.255.255.255").GetAddressBytes(), 0),
                    dwForwardNextHop = BitConverter.ToUInt32(IPAddress.Parse("XXX.XXX.XXX.XXX").GetAddressBytes(), 0),
                    dwForwardMetric1 = 99,
                    dwForwardType =  ForwardType.Indirect,
                    dwForwardProto =  ForwardProtocol.NetMGMT,
                    dwForwardAge = 0,
                    dwForwardIfIndex = interfaceIndex
                };
    var ipForwardEntry = RouteInterop.CreateIpForwardEntry(ref route);

这篇关于以编程方式添加路线的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！