<#
.SYNOPSIS
	Sends a TCP message to an IP address and port
.DESCRIPTION
	This script sends a TCP message to the given IP address and port.
.PARAMETER TargetIP
	Specifies the target IP address
.PARAMETER TargetPort
	Specifies the target port number
.PARAMETER Message
	Specifies the message to send
.EXAMPLE
	PS> ./send-tcp 192.168.100.100 8080 "TEST"
.NOTES
	Author: Markus Fleschutz · License: CC0
.LINK
	https://github.com/fleschutz/PowerShell
#>

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()

	"✔️  Done."
	exit 0 # success
} catch {
	"⚠️ Error: $($Error[0]) ($($MyInvocation.MyCommand.Name):$($_.InvocationInfo.ScriptLineNumber))"
	exit 1
}