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172
GateWay-KeepAlive.ps1
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172
GateWay-KeepAlive.ps1
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. $(-Join($(pwd).Path, '\config.ps1'))
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. $(-Join($(pwd).Path, '\proxy-test.ps1'))
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function isDhcpEnable(){
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return Get-NetIPConfiguration | select-object InterfaceAlias, IPv4Address, @{n="dhcp";e={$_.NetIPv4Interface.DHCP}} | Select-Object -ExpandProperty dhcp
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}
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function isForeignConnected {
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# check foreign network availability
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$result = Test-NetConnection -ComputerName $Global:TestDomain -Port 443
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if ($result.TcpTestSucceeded) {
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Write-Host "Successfully connected to $($Global:TestDomain) via HTTPS. isCustomGateway:$($Global:isCustomGateway)"
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return $true
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} else {
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Write-Host "Failed to connect to $($Global:TestDomain) via HTTPS. isCustomGateway:$($Global:isCustomGateway)"
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return $false
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}
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}
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function isNetworkConnected {
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# check network availability
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$result = $(Test-Connection -ComputerName $Global:TestIP -Count 1).Status -eq 'Success'
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if ($result) {
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Write-Host "Successfully connected to $($Global:TestIP) via ICMP. isCustomGateway:$($Global:isCustomGateway)"
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return $true
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} else {
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Write-Host "Failed to connect to $($Global:TestIP) via ICMP. isCustomGateway:$($Global:isCustomGateway)"
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return $false
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}
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}
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function setDhcp($enable){
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if($enable){
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Set-NetIPInterface -InterfaceAlias $Global:TargetNetworkAdapter.name -Dhcp Enabled
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Write-Host enable dhcp
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} else {
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Set-NetIPInterface -InterfaceAlias $Global:TargetNetworkAdapter.name -Dhcp Disabled
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Write-Host disable dhcp
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}
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}
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function changeGateway{
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param(
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$adapter,$isCustomGateway
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)
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Write-Host "Changing gateway for adapter: $($adapter.Name) isCustomGateway $($isCustomGateway)"
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# check gateway availability
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if($isCustomGateway){
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$currentGateway = $(Get-NetIPConfiguration).IPv4DefaultGateway.NextHop
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if($currentGateway -eq $Global:TargetGateway){
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Write-Host "current gateway is $currentGateway same as targetGateway $Global:TargetGateway, change gateway canceled"
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$Global:isCustomGateway = $true
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return
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}
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$result = $(Test-Connection $Global:TargetGateway -Count 1).Status
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if (! ($result -eq 'Success')){
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Write-Host custom gateway $Global:TargetGateway is $result, refuse to change
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return
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}
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}
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# check current ip configuration
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$existingIP = Get-NetIPAddress -InterfaceAlias $adapter.Name -AddressFamily IPv4
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# if have ip configuration, delete it
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if ($existingIP) {
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Write-Host "Removing existing IP address: $($existingIP.IPAddress)"
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Remove-NetIPAddress -InterfaceAlias $adapter.Name -Confirm:$false
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}
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# delete current route(gateway)
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$existingRoute = Get-NetRoute -InterfaceAlias $adapter.Name -DestinationPrefix "0.0.0.0/0"
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if ($existingRoute) {
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Write-Host "Removing existing default route..."
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Remove-NetRoute -InterfaceAlias $adapter.Name -Confirm:$false
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}
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if ($isCustomGateway){ #setting gateway
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# config customGateway
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$Global:isCustomGateway = $true
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# setting dns server
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Set-DnsClientServerAddress -InterfaceAlias $adapter.name -ServerAddresses ($Global:TargetGateway, $Global:TargetGateway)
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# disable dhcp
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setDhcp($false)
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# setting gateway to customGateway
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New-NetIPAddress -InterfaceAlias $adapter.Name -AddressFamily IPv4 -IPAddress $Global:TargetIP -PrefixLength 24 -DefaultGateway $Global:TargetGateway
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} else {
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# config originalGateway
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$Global:isCustomGateway = $false
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# setting dns server
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Set-DnsClientServerAddress -InterfaceAlias $adapter.name -ServerAddresses ($Global:originalDns, $Global:originalDns)
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# setting gateway to originalGateway
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New-NetIPAddress -InterfaceAlias $adapter.Name -AddressFamily IPv4 -IPAddress $Global:TargetIP -PrefixLength 24 -DefaultGateway $Global:originalGateway
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}
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Start-Sleep 3
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}
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function getIPAddress(){
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$IP = Get-NetIPConfiguration | Select-Object -ExpandProperty IPV4Address | Select-Object -ExpandProperty IPAddress
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return $IP
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}
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function getNetworkAdapter(){
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$networkAdapters = Get-NetAdapter | ForEach-Object {
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[PSCustomObject]@{
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Name = $_.Name
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Interface = $_.InterfaceDescription
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Status = $_.Status
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LinkSpeed = $_.LinkSpeed
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MacAddress = $_.MacAddress
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}
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}
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foreach ($networkAdapter in $networkAdapters){
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if($networkAdapter.name.Contains($TargetNetworkAdapterKeyword)){
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$Global:TargetNetworkAdapter = $networkAdapter
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break;
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}
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}
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Write-Host "getNetworkAdapter: " $Global:TargetNetworkAdapter
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}
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function init {
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# check permission
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$IsAdmin = [Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()
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if (-not $IsAdmin.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
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# if not admin permission, restart it with admin permission
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Write-Host "Requesting Administrator privileges..."
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Start-Process pwsh -ArgumentList "-NoExit", "-File", $PSCommandPath -Verb RunAs
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exit
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}
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Write-Host "Running with Administrator privileges!"
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# get netAdapter instance
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getNetworkAdapter
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Write-Host "current adapter: $($Global:TargetNetworkAdapter.name)"
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# try to change to customGateway at start
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changeGateway $Global:TargetNetworkAdapter $true
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}
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function loop(){
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while($true){
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# if network offline and using customGateway, try to restore to originalGateway
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if((!$(isNetworkConnected)) -and $Global:isCustomGateway){
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changeGateway $Global:TargetNetworkAdapter $false
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}
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# if customGateway proxy is working and using original gateway, try to change to customGateway
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if($(Test-SocksProxy -ProxyHost $Global:TargetGateway -ProxyPort 1070) -and (!$Global:isCustomGateway)){
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Write-Host isCustomGateway $Global:isCustomGateway
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changeGateway $Global:TargetNetworkAdapter $true
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}
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# if customGateway proxy is not working but network still online, do nothing
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Start-Sleep 1
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}
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}
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init
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loop
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9
config.ps1
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9
config.ps1
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$Global:TestDomain = "www.google.com" #测试代理是否可用
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$Global:TestIP = "223.5.5.5" #测试是否连接网络
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$Global:originalDns = "223.5.5.5" #默认DNS
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$Global:TargetGateway = "192.168.6.2" #代理网关
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$Global:TargetIP = "192.168.6.4" #默认ip
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$Global:originalGateway = "192.168.6.1" #默认网关
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$Global:TargetNetworkAdapter = {} #网络适配器实例
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$Global:TargetNetworkAdapterKeyword = "Ethernet" #网络适配器名字通配符
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$Global:isCustomGateway = $false #是否为自定义网关
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76
proxy-test.ps1
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76
proxy-test.ps1
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@ -0,0 +1,76 @@
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function Test-SocksProxy {
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param (
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[string]$ProxyHost,
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[int]$ProxyPort,
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[string]$TestHost = "google.com",
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[int]$TestPort = 443
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)
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$result = $false
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try {
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# check if proxy is working
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$result = $(Test-Connection $ProxyHost -Count 1).Status
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if(!($result -eq "Success")){
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Write-Host proxy host $ProxyHost is $result
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return $false
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}
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# create TCP client
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$tcpClient = New-Object System.Net.Sockets.TcpClient
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$tcpClient.SendTimeout = 1000
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$tcpClient.ReceiveTimeout = 1000
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$tcpClient.Connect($ProxyHost, $ProxyPort)
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# 代理成功连接，开始验证目标地址是否可达
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$stream = $tcpClient.GetStream()
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# 构建 SOCKS5 握手包 (Initial request)
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$handshake = [byte[]](0x05, 0x01, 0x00) # Version 5, 1 method, No auth
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$stream.Write($handshake, 0, $handshake.Length)
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# 接收服务器响应
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$response = New-Object byte[] 2
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$stream.Read($response, 0, $response.Length)
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if ($response[1] -ne 0x00) {
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throw "SOCKS handshake failed. Proxy does not support no-authentication."
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}
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# 将 TestHost 转换为字节数组
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$hostBytes = [System.Text.Encoding]::ASCII.GetBytes($TestHost)
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# 构建 SOCKS5 连接请求
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$connectRequest = @(
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0x05, 0x01, 0x00, 0x03, # Version 5, Connect, Reserved, Domain
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[byte]$hostBytes.Length # Domain length
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) + $hostBytes + @(
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[byte]($TestPort -shr 8), # Port (high byte)
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[byte]($TestPort -band 0xFF) # Port (low byte)
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)
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$stream.Write($connectRequest, 0, $connectRequest.Length)
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# 接收连接响应
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$connectResponse = New-Object byte[] 10
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$stream.Read($connectResponse, 0, $connectResponse.Length)
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if ($connectResponse[1] -eq 0x00) {
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Write-Host "Proxy is valid and can connect to ${TestHost}:$TestPort."
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$result = $true
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} else {
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throw "SOCKS connection to ${TestHost}:$TestPort failed. Response code: $($connectResponse[1])"
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$result = $false
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}
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} catch {
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Write-Host "Proxy test failed: $_"
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$result = $false
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} finally {
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# 关闭连接
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if ($stream) { $stream.Dispose() }
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if ($tcpClient) { $tcpClient.Close() }
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}
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return $result
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}
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# Test-SocksProxy -ProxyHost "192.168.6.2" -ProxyPort 1081
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