Send and Receive sample using PowerShell

TCP-SendRcv.ps1

function TcpSendRecv()
{
param(
[int] $Port = 5005,
$IP = "127.0.0.1" ,
$Message = "TRUN ." + "A"*6000 +". "
)
  
$Address = [system.net.IPAddress]::Parse($IP) 
 
# Create IP Endpoint 
$End = New-Object System.Net.IPEndPoint $Address, $Port 
 
# Create Socket 
$Saddrf   = [System.Net.Sockets.AddressFamily]::InterNetwork 
$Stype    = [System.Net.Sockets.SocketType]::Stream 
$Ptype    = [System.Net.Sockets.ProtocolType]::Tcp  #this could also be UDP
$Sock     = New-Object System.Net.Sockets.Socket $saddrf, $stype, $ptype 
#$Sock.TTL = 26 
 
# Connect to socket 
$Sock.Connect($end) 
 
# Create encoded buffer 
$Enc     = [System.Text.Encoding]::ASCII 
$Buffer  = $Enc.GetBytes($Message) 
 
# Send the buffer 
$Sent   = $Sock.Send($Buffer) 
"{0} characters sent to: {1} " -f $Sent,$IP 
"Message is: `n $Message"
 
#Now to receive  -- we're assuming receive buffer is 400
$buffer = new-object System.Byte[] 400 
$Received = $Sock.Receive($buffer)   #-- oh-oh, buffer overflow exploit possible here...
"Received $Received bytes"
 
if($Received -ne 0)
{
    $Encode = new-object "System.Text.ASCIIEncoding" 
    $test = $Encode.GetString($buffer)     
    "TCP Message received:" $test 
}   
# End of Script 
}