Router_master

comp = {} --table of all known terminals. "name":id

rednet.open("back")
rednet.host("BASE", "master")

--sends the packets to their correct locations
function route(source, packet)
  if cotains(comp, packet.dest) then
    rednet.send(comp[packet.dest], packet)
  else
    rednet.send(source, "that is not a valid adress")
  end
end

--handles what to do with recieved packets
function recieve()
  local id, message = rednet.receive()

  if message.message == "connect" then
    update(id, message.id)
    return
  end

  if not contains(comp, message.id) then
    udpade(id, message.id)
    route(id, message)
  else
    route(message)
  end
end

--updates the list of known systems with a new entry
function update(id, name)
  if not contains(comp, name) then
    comp[name] = id
  end
end

--checks if a key is in the specified table
function contains(table, object)
  for i in pairs(table) do
    if i == object then
      return true
    else
      return false
    end
  end
end

--main program loop
while true do
  recieve()

  --debugging code
  print("recieved")
  for i, v in ipairs(comp) do
    print(i)
    print(v)
  end
  print("end")
  --end debugging code
end