send-udp-in-chrome.js

const speedometer = require('speedometer')

const speed = speedometer()

setInterval(function () {
  console.log(speed())
}, 1000)

const udp = chrome.sockets.udp
udp.create({}, function (res) {
  const sid = res.socketId
  udp.onReceive.addListener(function (res) {
    speed(res.data.byteLength)
  })
  udp.bind(sid, '0.0.0.0', 9999, function () {
    console.log('bound')
    const buf = new ArrayBuffer(1000)
    setInterval(loop, 5)
    function loop () {
      udp.send(sid, buf, '159.65.107.57', 10000, noop)
    }
    function noop () {}
  })
})