function repeat_nodes(side, route_ch)
  local modem = peripheral.wrap(side)
  modem.open(route_ch)
  while true do
    local message, senderChannel = os.event("modem_message")
    if senderChannel = route_ch then
      local repeat_channel = message
      modem.open(repeatchannel)
      while true do
        local message, senderChannel = os.event("modem_message")
        if senderChannel = repeat_channel then
          modem.transmit(repeat_channel, repeat_channel, message)
          modem.close(repeat_channel)
          break
        end
      end
    end
  end
end