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'use strict';
const common = require('../common');
const assert = require('assert');
const dgram = require('dgram');
function pingPongTest(port, host) {
const server = dgram.createSocket('udp4', common.mustCall((msg, rinfo) => {
assert.strictEqual(msg.toString('ascii'), 'PING');
server.send('PONG', 0, 4, rinfo.port, rinfo.address);
}));
server.on('error', function(e) {
throw e;
});
server.on('listening', function() {
console.log(`server listening on ${port}`);
const client = dgram.createSocket('udp4');
client.on('message', function(msg) {
assert.strictEqual(msg.toString('ascii'), 'PONG');
client.close();
server.close();
});
client.on('error', function(e) {
throw e;
});
console.log(`Client sending to ${port}`);
function clientSend() {
client.send('PING', 0, 4, port, 'localhost');
}
clientSend();
});
server.bind(port, host);
return server;
}
const server = pingPongTest(common.PORT, 'localhost');
server.on('close', common.mustCall(pingPongTest.bind(undefined, common.PORT)));