在上篇文章中，我們在PSNet包中創建了Test-TCPPort函數用于探測指定IP的指定端口是否開放，檢測端口之后大多數人想到的可能就是需要通過PowerShell收發TCP消息包了，這篇文章里將會描述如何在PSNet包中創建針對TCP消息包的函數Receive-和TCPMessageSend-TCPMessage。為了承接上篇中我們創建的PSNet工具集的思路，在確定了函數的命名之后，創建上述兩個函數對應的.ps1文件放置在$env:PSSpace/PSNet/TCPOp/中。

接下來在$env:PSSpace/PSNet/PSNet.psm1中添加以下兩條語句用于在工具集中引入上述兩個函數文件：

代碼如下:
. $env:PSSpace/PSNet/TCPOp/Receive-TCPMessage.ps1
. $env:PSSpace/PSNet/TCPOp/Send-TCPMessage.ps1

然后分別在創建的.ps1文件中添加以下代碼:

代碼如下:
 =====文件名：Receive-TCPMessage.ps1=====
Function Receive-TCPMessage
{
    param ( [ValidateNotNullOrEmpty()]
    [int] $Port )
    try
    {
        $EndPoint = New-Object System.Net.IPEndPoint([System.Net.IPAddress]::Loopback,$Port)
        $Socket = New-Object System.Net.Sockets.TCPListener($EndPoint)
        $Socket.Start()
        $Socket = $Socket.AcceptTCPClient()
        $EncodedText = New-Object System.Text.ASCIIEncoding
        $Stream = $Socket.GetStream()
        $Buffer = New-Object System.Byte[] $Socket.ReceiveBufferSize
        while( $Bytes = $Stream.Read($Buffer,0,$Buffer.Length) )
        {
            $Stream.Write($Buffer,0,$Bytes)
            Write-Output $EncodedText.GetString($Buffer,0,$Bytes)
        }
        $Socket.Close()
        $Socket.Stop()
    }
    catch{}
}

代碼如下:
        =====文件名：Send-TCPMessage.ps1=====
Function Send-TCPMessage
{
    param ( [ValidateNotNullOrEmpty()]
    [string] $EndPoint,
    [int] $Port,
    [string] $Message )

    $IP = [System.Net.Dns]::GetHostAddresses($EndPoint)
    $Address = [System.Net.IPAddress]::Parse($IP)
    $Socket = New-Object System.Net.Sockets.TCPClient($Address,$Port)
    $Stream = $Socket.GetStream()