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40 lines
800 B

'use strict';
var common = require('../common');
var dgram = require('dgram');
var callbacks = 0;
var client;
var timer;
if (common.isOSX) {
common.skip('because of 17894467 Apple bug');
return;
}
client = dgram.createSocket('udp4');
client.bind(0, function() {
function callback() {
callbacks++;
if (callbacks == 2) {
clearTimeout(timer);
client.close();
} else if (callbacks > 2) {
throw new Error('the callbacks should be called only two times');
}
}
client.on('message', function(buffer, bytes) {
callback();
});
const port = this.address().port;
client.send(
Buffer.allocUnsafe(1), 0, 0, port, '127.0.0.1', (err, len) => {
callback();
});
timer = setTimeout(function() {
throw new Error('Timeout');
}, 200);
});