Send ip6 neigh addr via mqtt

mqtt-send-ip6-neigh.lua

local function send_ip6neigh(mqtt,dev)
	local neigh_table = nil
	local neightbl = require "neightbl"
	local neigh = nil
	local qos = 1                                                                
        local retain = false
	neigh_table=neightbl.get(dev)

	for ip,mac in pairs(neigh_table) do
		if mac then
        		print("ip6: "..ip.." mac: "..mac)
			local mid = mqtt:publish("druschba/"..dev.."/", ip..","..mac, qos, retain)
		end
	end
end

local mosq = require("mosquitto")
mosq.init()
local state = { should_run = true }
local mqtt
local mqtt = mosq.new()

local function handle_ON_CONNECT(success, rc, str)
    print("on connect ->", success, rc, str)
    if not success then
        printf("Failed to connect: %d : %s\n", rc, str)
        return
    end
    state.mqtt_connected = true
end

broker = arg[1] -- defaults to "localhost" if arg not set

mqtt.ON_CONNECT = handle_ON_CONNECT
mqtt:connect(broker)
mqtt:loop_start()
while state.should_run do
	if state.mqtt_connected then
		print("send")
        	send_ip6neigh(mqtt,"eth1")
		send_ip6neigh(mqtt,"eth0.1")
		send_ip6neigh(mqtt,"eth0.2")
	end
        os.execute("sleep 1")
        print("tick tock...\n")
end
mqtt:disconnect()
mqtt:loop_stop()