rednet.open("left")
while true do
  local senderId, message, protocol = rednet.receive()
  if protocol ~= "server.jnet" then
    print("Not SJNET request from "..senderID.." with contents of '"..message"'.")
    return
  end
  if senderId == 4 then
    rednet.send(4, "printer`texxt", "server.jnet")
    print("Sending data to user "..message.." to server id "..senderId..". ")
  end
end