wsl2 open port

wslport.ps1

param($port, $op='open', $protocol='tcp')

#Remove Firewall Exception Rules
Function removeFirewall(){
    Invoke-Expression "Remove-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock *' ";
    Invoke-Expression "netsh interface portproxy reset";
}



Function openPort($proto, $port, $addr, $wsladdr){
    Invoke-Expression "New-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock $proto $port' -Direction Outbound -LocalPort $port -Action Allow -Protocol $proto";
    Invoke-Expression "New-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock $proto $port' -Direction Inbound -LocalPort $port  -Action Allow -Protocol $proto";

    Invoke-Expression "netsh interface portproxy delete v4tov4 listenport=$port listenaddress=$addr protocol=$proto";
    Invoke-Expression "netsh interface portproxy add v4tov4 listenport=$port listenaddress=$addr connectport=$port connectaddress=$wsladdr protocol=$proto";
}

Function closePort($proto, $port, $addr){
    Invoke-Expression "Remove-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock $proto $port' ";

    Invoke-Expression "netsh interface portproxy delete v4tov4 listenport=$port listenaddress=$addr protocol=$proto";
}


if ($port){
   if ($port -eq 'remove'){
       $op = 'remove'
   } 
}else{
    echo "no operation specified"
    exit
}

$wsladdr = bash.exe -c "ifconfig eth0 | grep 'inet '"
$found = $wsladdr -match '\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}';
$addr = "0.0.0.0"

if( $found ){
  $wsladdr = $matches[0];
} else{
  echo "The Script Exited, the ip address of WSL 2 cannot be found";
  exit;
}

switch($op){
    'remove' {
        removeFirewall
    }
    'open' {
        openPort $protocol $port $addr $wsladdr
    }
    'close' {
        closePort $protocol $port $addr 
    }
    Default {
        echo 'unknown operation'
        exit
    }
}