Categories
PowerShell Scripting

PowerShell TCP Socket Function

The PowerShell function example below can be used to transmit information using the TCP protocol. For example, to perform an HTTP GET command on a website.

function fnTCPSock([string]$sHostName, [string]$sPort, [string]$sScript) {
  # Converteer script string to byte for write stream...
  [byte[]]$byteScript = [System.Text.Encoding]::ASCII.GetBytes($($sScript))
  # Open 4096 Bytes buffer for read stream...
  [byte[]]$byteBuffer = New-Object System.Byte[] 16384
  
  # Connect to host...
  $oTCPSock = New-Object System.Net.Sockets.TcpClient($sHostName, $sPort)
  $oStream = $oTCPSock.GetStream() 
  
  # Feed script(byte) tot write stream...
  $oStream.Write($byteScript, 0, $byteScript.Length)

  # Return read buffer converted to string...
  [string]$sCount = $oStream.Read($byteBuffer, 0, 16384)
  return [System.Text.Encoding]::ASCII.GetString($byteBuffer, 0, $sCount) 

  # Close objects...
  $oResult.Close()
  $oSockTCP.Close()
}
[string]$sScript1 = "GET / HTTP/1.1`r`nAccept: text/html`r`nHost: [virtualhostname]`r`nReferer: http://host.domain.name/site/`r`n`r`n`r`n"
[string]$sResult1 = fnTCPSock "hostname" "80" $($sScript1)