PowerShell/Scripts/send-tcp.ps1

#!/snap/bin/powershell
<#
.SYNTAX         ./send-tcp.ps1 [<target-IP>] [<target-port>] [<message>]
.DESCRIPTION	sends a TCP message to the given IP address and port
.LINK		https://github.com/fleschutz/PowerShell
.NOTES		Author:	Markus Fleschutz / License: CC0
#>

param([string]$TargetIP = "", [int]$TargetPort = 0, [string]$Message = "")

try {
	if ($TargetIP -eq "" ) {
		$TargetIP = read-host "Enter target IP address"
	}
	if ($TargetPort -eq 0 ) {
		$TargetPort = read-host "Enter target port"
	}
	if ($Message -eq "" ) {
		$Message = read-host "Enter message to send"
	}

        $IP = [System.Net.Dns]::GetHostAddresses($TargetIP) 
        $Address = [System.Net.IPAddress]::Parse($IP) 
        $Socket = New-Object System.Net.Sockets.TCPClient($Address,$TargetPort) 
        $Stream = $Socket.GetStream() 
        $Writer = New-Object System.IO.StreamWriter($Stream)
        $Message | % {
        	$Writer.WriteLine($_)
        	$Writer.Flush()
        }
        $Stream.Close()
        $Socket.Close()

	write-output "Done."
	exit 0
} catch {
	write-error "ERROR in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
	exit 1
}