Moddable SDK - UDP example

main.js

import {Socket} from "socket";
import Timer from "timer"

const socket = new Socket({kind: "UDP"});
socket.callback = function(message, value) {
	if (Socket.readable !== message)
		return;

	const buffer = this.read(ArrayBuffer);
	const longs = new Uint32Array(buffer);
	trace(`Received ${longs[0]}\n`);
}

let count = 0;
Timer.repeat(() => {
	const longs = Uint32Array.of(count++);
	socket.write("10.0.1.8", 31337, longs.buffer);
}, 100)

manifest.json

{
	"include": [
		"$(MODDABLE)/examples/manifest_base.json",
		"$(MODDABLE)/examples/manifest_net.json"
	],
	"modules": {
		"main": "./main"
	}
}

reply-to-empty-udp.py

#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# Author: David Manouchehri <manouchehri@protonmail.com>
# This script will always echo back data on the UDP port of your choice.
# Useful if you want nmap to report a UDP port as "open" instead of "open|filtered" on a standard scan.
# Works with both Python 2 & 3.

import socket

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

server_address = '0.0.0.0'
server_port = 31337

server = (server_address, server_port)
sock.bind(server)
print("Listening on " + server_address + ":" + str(server_port))

while True:
	payload, client_address = sock.recvfrom(1024)
	print("Echoing data back to " + str(client_address))
	sent = sock.sendto(payload, client_address)