use powershell socket server to get remote command - sockets

Question

I want use a powershell socket server to get remote command.
But I only can get the remote command once.
Can someone give me a help? thanks.
Here is my code:
$endpoint = new-object System.Net.IPEndPoint([system.net.ipaddress]::any, 12346)
$listener = new-object System.Net.Sockets.TcpListener $endpoint
while($true)
{
$listener.Start()
$client = $listener.AcceptTcpClient()
[System.IO.StreamReader]$stream = new-object System.IO.StreamReader -argumentList $client.GetStream()
while($true)
{
$line = $stream.ReadLine()
while($line -ne $null){
Write-Host $line -ForegroundColor Yellow
}
}
$client.Close()
$listener.Stop()
}

Answer 1

The problem is that your while check ($line -ne $null) will always be true because $line is not assigned the new value after initial assignment,
try this:
$endpoint = new-object System.Net.IPEndPoint([system.net.ipaddress]::any, 12346)
$listener = new-object System.Net.Sockets.TcpListener $endpoint
while($true)
{
$listener.Start()
$client = $listener.AcceptTcpClient()
[System.IO.StreamReader]$stream = new-object System.IO.StreamReader -argumentList $client.GetStream()
while($true)
{
do {
$line = $stream.ReadLine()
Write-Host $line -ForegroundColor Yellow
}while($line -ne $null)
}
$client.Close()
$listener.Stop()
}