proc scan_ip {start_ip end_ip} {
 global globals
 set curr_ip 192.168.0.$start_ip
 set end_ip_section 192.168.0.$end_ip
  while {$curr_ip != $end_ip_section} {
    #open the whole bunch of sockets (normally 255)
    if {![catch {set sock [socket  -async $curr_ip $globals(client_server_port)]}]} {
      fconfigure $sock -blocking 0 -buffering line
      append ip_list "$sock $curr_ip "  
    puts "testing:$curr_ip"
    }
    incr start_ip
    set curr_ip 192.168.0.$start_ip
  }
 after 100
 #check the successfully opened sockets if there is an server behind 
 foreach {sock curr_ip} $ip_list {
 set test ""
  catch {set test [gets $sock] }
   if {$test == "SERVER_OK" } { 
   set ret_ip $curr_ip
   puts "SUCCESS: Found server at: $curr_ip"
   break
   }
 }
 #close sockets again
 foreach {sock curr_ip} $ip_list {
 close $sock
 }
 }

 proc Configure_Server_Client {sock addr port} {
    global globals
    # Record the client's information
    fconfigure $sock -blocking 0 -buffering line
    # Set up a event if data is present at admin socket
    if {[catch {puts $sock "SERVER_OK"}]} {
    puts "remote gui socket not available anymore closing sock: $sock"
    close $sock
    return
    }
 ##for this check all is done I close the socket again
 close $sock
 puts "successfully etablished connection to client"
 exit
 }
 ###MAIN########
 if {$argc != 1} {
 puts "usage:[file tail $argv0] <server|client>"
 exit
 }
 set globals(client_server_port) 9901
 switch $argv {
        server {
                puts "opening server socket at port $globals(client_server_port)"
                socket -server Configure_Server_Client $globals(client_server_port)
                vwait forever
                }
        client {
                scan_ip 2 255
               }