120 lines
4.2 KiB
C#
120 lines
4.2 KiB
C#
using FastGithub.Configuration;
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Diagnostics;
|
|
using System.Linq;
|
|
using System.Net;
|
|
using System.Net.NetworkInformation;
|
|
using System.Runtime.InteropServices;
|
|
using System.Runtime.Versioning;
|
|
|
|
namespace FastGithub.Dns
|
|
{
|
|
/// <summary>
|
|
/// 系统域名服务工具
|
|
/// </summary>
|
|
[SupportedOSPlatform("windows")]
|
|
static class SystemDnsUtil
|
|
{
|
|
/// <summary>
|
|
/// www.baidu.com的ip
|
|
/// </summary>
|
|
private static readonly IPAddress www_baidu_com = IPAddress.Parse("183.232.231.172");
|
|
|
|
[DllImport("iphlpapi")]
|
|
private static extern int GetBestInterface(uint dwDestAddr, ref uint pdwBestIfIndex);
|
|
|
|
/// <summary>
|
|
/// 刷新DNS缓存
|
|
/// </summary>
|
|
[DllImport("dnsapi.dll", EntryPoint = "DnsFlushResolverCache", SetLastError = true)]
|
|
public static extern void DnsFlushResolverCache();
|
|
|
|
|
|
/// <summary>
|
|
/// 通过远程地址查找匹配的网络适接口
|
|
/// </summary>
|
|
/// <param name="remoteAddress"></param>
|
|
/// <returns></returns>
|
|
private static NetworkInterface GetBestNetworkInterface(IPAddress remoteAddress)
|
|
{
|
|
var dwBestIfIndex = 0u;
|
|
var dwDestAddr = BitConverter.ToUInt32(remoteAddress.GetAddressBytes());
|
|
var errorCode = GetBestInterface(dwDestAddr, ref dwBestIfIndex);
|
|
if (errorCode != 0)
|
|
{
|
|
throw new NetworkInformationException(errorCode);
|
|
}
|
|
|
|
var @interface = NetworkInterface
|
|
.GetAllNetworkInterfaces()
|
|
.Where(item => item.GetIPProperties().GetIPv4Properties().Index == dwBestIfIndex)
|
|
.FirstOrDefault();
|
|
|
|
return @interface ?? throw new FastGithubException("找不到网络适配器用来设置dns");
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
/// 设置主dns
|
|
/// </summary>
|
|
/// <param name="primitive"></param>
|
|
/// <exception cref="NetworkInformationException"></exception>
|
|
/// <exception cref="NotSupportedException"></exception>
|
|
public static void DnsSetPrimitive(IPAddress primitive)
|
|
{
|
|
var @interface = GetBestNetworkInterface(www_baidu_com);
|
|
var dnsAddresses = @interface.GetIPProperties().DnsAddresses;
|
|
if (primitive.Equals(dnsAddresses.FirstOrDefault()) == false)
|
|
{
|
|
var nameServers = dnsAddresses.Prepend(primitive);
|
|
SetNameServers(@interface, nameServers);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// 移除主dns
|
|
/// </summary>
|
|
/// <param name="primitive"></param>
|
|
/// <exception cref="NetworkInformationException"></exception>
|
|
/// <exception cref="NotSupportedException"></exception>
|
|
public static void DnsRemovePrimitive(IPAddress primitive)
|
|
{
|
|
var @interface = GetBestNetworkInterface(www_baidu_com);
|
|
var dnsAddresses = @interface.GetIPProperties().DnsAddresses;
|
|
if (primitive.Equals(dnsAddresses.FirstOrDefault()))
|
|
{
|
|
var nameServers = dnsAddresses.Skip(1);
|
|
SetNameServers(@interface, nameServers);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// 设置网口的dns
|
|
/// </summary>
|
|
/// <param name="interface"></param>
|
|
/// <param name="nameServers"></param>
|
|
private static void SetNameServers(NetworkInterface @interface, IEnumerable<IPAddress> nameServers)
|
|
{
|
|
Netsh($@"interface ipv4 delete dns ""{@interface.Name}"" all");
|
|
foreach (var address in nameServers)
|
|
{
|
|
Netsh($@"interface ipv4 add dns ""{@interface.Name}"" {address} validate=no");
|
|
}
|
|
|
|
static void Netsh(string arguments)
|
|
{
|
|
var netsh = new ProcessStartInfo
|
|
{
|
|
FileName = "netsh.exe",
|
|
Arguments = arguments,
|
|
CreateNoWindow = true,
|
|
UseShellExecute = false,
|
|
WindowStyle = ProcessWindowStyle.Hidden
|
|
};
|
|
Process.Start(netsh)?.WaitForExit();
|
|
}
|
|
}
|
|
}
|
|
}
|