Router

local component = require("component")
local event = require("event")
local serialization = require("serialization")
local m = component.modem
local allPortsOpen = true
local clients = {}

function init()
m.open(5)
if m.isOpen(5) then
    allPortsOpen = true
end
m.open(10)
if m.isOpen(10) then
    allPortsOpen = true
end
if allPortsOpen == false then
    print("Can't bind all ports")
end
end
function handleRequest(from, port, message)
message = serialization.unserialize(message)
print(port, tostring(message.method, message.message))
if port == 5 then
    if message.to == "router" then
        if message.method == "connection" then
            m.send(from, 5, serialization.serialize({connected = true, serverAddress=localAddress}))
            alreadyConnected = false
            for index, clientId in ipairs(clients) do
                if clientId == from then
                    alreadyConnected = true
                end
            end
            if alreadyConnected == false then
                table.insert(clients, from)
            end
            print("Client connected: " .. from)
        end
    end
    if message.method == "broadcast" then
            m.open(message.port)
            for index, clientId in ipairs(clients) do
                print(clientId)
                m.send(clientId, message.port, serialization.serialize({port = message.port, from = from, time = message.time, message = message.message}))
            end
            m.close(message.port)
            print("Broadcasted by: " .. from)
    end
    if message.message == "stop" then
        print("stopping! from: " .. from)
        os.exit()
    end
end
if port == 10 then
    m.open(message.port)
    m.send(message.to, message.port, serialization.serialize({port = message.port, from = from, to = message.to,        time = message.time, message = message.message}))
    m.close(message.port)
    print("Routed message from: " .. from .. " to: " .. message.to)
end
end
function listening()
local _, localAddress, from, port, distance, message = event.pull("modem_message")
    handleRequest(from, port, message)
    m.open(10)
    m.open(5)
    listening()
end
init()
print("Start listening")
listening()