在上篇文章中,我们在PSNet包中创建了Test-TCPPort函数用于探测指定IP的指定端口是否开放,检测端口之后大多数人想到的可能就是需要通过PowerShell收发TCP消息包了,这篇文章里将会描述如何在PSNet包中创建针对TCP消息包的函数Receive-和TCPMessageSend-TCPMessage。为了承接上篇中我们创建的PSNet工具集的思路,在确定了函数的命名之后,创建上述两个函数对应的.ps1文件放置在$env:PSSpace/PSNet/TCPOp/中。
接下来在$env:PSSpace/PSNet/PSNet.psm1中添加以下两条语句用于在工具集中引入上述两个函数文件:
代码如下:
. $env:PSSpace/PSNet/TCPOp/Receive-TCPMessage.ps1
. $env:PSSpace/PSNet/TCPOp/Send-TCPMessage.ps1
然后分别在创建的.ps1文件中添加以下代码:
代码如下:
=====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{}
}
代码如下:
=====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()
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