ActiveSocket Toolkit Add network capabilities to any Windows or .NET application

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Powershell TFTP Client Sample Source Code

ActiveSocket provides an easy-to-use development interface to a variety of IP protocols. By using ActiveSocket, you can very easily create or enhance applications with network features.

ActiveSocket features the following: DNS, FTP, HTTP, HTTPs, ICMP Ping, IP-to-Country, MSN, NTP, RSH, SCP, SFTP, SNMP v1/v2c (Get, GetNext, Set), SNMP Traps, SNMP MIB, SSH, TCP, Telnet, TFTP, UDP, Telnet, Wake-On-LAN and more.

ActiveSocket can be well integrated into ASP environments. This document describes how the ActiveSocket TftpServer object can be integrated into Powershell projects.

The most important functions of the TftpServer object are:

  • GetFile - get (download) a file, either using binary transfer or ASCII transfer;
  • PutFile - put (upload) a file, either using binary transfer or ASCII transfer;

Step 1: Download and install the ActiveSocket Toolkit

Download ActiveSocket from the ActiveXperts Download Site and start the installation. The installation guides you through the installation process.

Step 2: Create a new script

Create a new script using your favorite editor. You can simply use notepad. However, a Powershell editor is recommended, so you can browse through objects, objects properties and object functions.

You're now able to write a more advanced script to communicate using the ActiveSocket Toolkit.

Step 3: Create the ActiveSocket object in Powershell

Create a new Powershell file called DEMO.PS1.

Create the ActiveSocket object(s) like this:

$objTftp = new-object -comobject ActiveXperts.TftpServer

Now, add the following lines to the file to have your fist ActiveSocket Powershell program:

Write-Host "ActiveSocket Version " $objTftp.Version "; Build " $objTftp.Build "; Module " $objTftp.Module
Write-Host "Expiration date: " $objTftp.ExpirationDate

Full Sample Code

#################################################################################
# ActiveSocket - Powershell script
# © Copyright ActiveXperts Software B.V.
#
# For more information about ActiveSocket, please
# visit the online ActiveSocket page at:
# http://www.activexperts.com
#################################################################################
# ActiveSocket sample - TFTP
#  TFTP Sample: simple sample to show how retrieve a file ffrom a 
#               remote TFTP server
#################################################################################

cls

#################################################################################
# Functions --------------------------------------------------------------------#
#################################################################################


#################################################################################
# ReadInput --------------------------------------------------------------------#

function ReadInput($strTitle, $strDefault, $bAllowEmpty)
{
	$strReturn = ""
	do
		{
		     $strInput = Read-host $strTitle, $strDefault
		     if($strInput -ne "") 
				{
		          $strReturn = $strInput
				}
			
			if($bAllowEmpty -eq 1)
				{
					break
				}
		}		
	while($strReturn -eq "")

	return $strReturn
}


#################################################################################
# THE SCRIPT ITSELF ------------------------------------------------------------#
#################################################################################
 
# Create a TftpServer instance
$objTftp = new-object -comobject ActiveXperts.TftpServer

# Write some information to console
Write-Host "ActiveSocket Version " $objTftp.Version "; Build " $objTftp.Build "; Module " $objTftp.Module
Write-Host "Expiration date: " $objTftp.ExpirationDate

$strHost                = ReadInput "Enter a host name or IP address" "192.168.31.98"
$strRemoteFile          = ReadInput "Enter the filename on the remote TFTP host" "test.txt"

# $objTftp.LogFile      = "c:\tftp.txt"

# Default port: 69. If you need another port, set this property
$objTftp.HostPort       = 69     

# Default:binary. To use ASCII, set this property to False.
$objTftp.BinaryTransfer = $true   

# Timeout in milliseconds.
$objTftp.Timeout        = 5000   
$objTftp.Get($strHost, $strRemoteFile)

Write-Host "Get, result: " $objTftp.LastError " (" $objTftp.GetErrorDescription($objTftp.LastError) ")"
if( $objTftp.LastError -eq 0 )
	{
		Write-Host "Packets received: " $objTftp.PacketsReceived
		Write-Host "Bytes received: " $objTftp.BytesReceived
	}
		
Write-Host "Ready."

To run the code, start Powershell and browse to the location of the file you just created. Enter .\Demo.ps1 to run the code. Notice that if the script is not working, you have to change the execution policy; you can do that with the following command: 

Set-ExecutionPolicy -unrestricted

There are TFTP samples included with the product. You can also find them on the ActiveXperts FTP site: ftp.activexperts-labs.com/samples/network-component.